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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/gpio
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/gpio')
-rw-r--r--kernel/drivers/gpio/Kconfig229
-rw-r--r--kernel/drivers/gpio/Makefile11
-rw-r--r--kernel/drivers/gpio/devres.c18
-rw-r--r--kernel/drivers/gpio/gpio-104-idio-16.c216
-rw-r--r--kernel/drivers/gpio/gpio-74x164.c1
-rw-r--r--kernel/drivers/gpio/gpio-74xx-mmio.c9
-rw-r--r--kernel/drivers/gpio/gpio-adp5588.c10
-rw-r--r--kernel/drivers/gpio/gpio-altera.c28
-rw-r--r--kernel/drivers/gpio/gpio-amdpt.c261
-rw-r--r--kernel/drivers/gpio/gpio-arizona.c2
-rw-r--r--kernel/drivers/gpio/gpio-ath79.c205
-rw-r--r--kernel/drivers/gpio/gpio-bcm-kona.c52
-rw-r--r--kernel/drivers/gpio/gpio-brcmstb.c554
-rw-r--r--kernel/drivers/gpio/gpio-crystalcove.c4
-rw-r--r--kernel/drivers/gpio/gpio-davinci.c23
-rw-r--r--kernel/drivers/gpio/gpio-dln2.c1
-rw-r--r--kernel/drivers/gpio/gpio-dwapb.c8
-rw-r--r--kernel/drivers/gpio/gpio-em.c37
-rw-r--r--kernel/drivers/gpio/gpio-ep93xx.c9
-rw-r--r--kernel/drivers/gpio/gpio-etraxfs.c486
-rw-r--r--kernel/drivers/gpio/gpio-f7188x.c4
-rw-r--r--kernel/drivers/gpio/gpio-generic.c121
-rw-r--r--kernel/drivers/gpio/gpio-grgpio.c25
-rw-r--r--kernel/drivers/gpio/gpio-intel-mid.c2
-rw-r--r--kernel/drivers/gpio/gpio-it87.c411
-rw-r--r--kernel/drivers/gpio/gpio-it8761e.c230
-rw-r--r--kernel/drivers/gpio/gpio-lpc18xx.c170
-rw-r--r--kernel/drivers/gpio/gpio-lynxpoint.c4
-rw-r--r--kernel/drivers/gpio/gpio-max7301.c1
-rw-r--r--kernel/drivers/gpio/gpio-max730x.c1
-rw-r--r--kernel/drivers/gpio/gpio-max732x.c33
-rw-r--r--kernel/drivers/gpio/gpio-mc33880.c1
-rw-r--r--kernel/drivers/gpio/gpio-mcp23s08.c6
-rw-r--r--kernel/drivers/gpio/gpio-moxart.c31
-rw-r--r--kernel/drivers/gpio/gpio-mpc8xxx.c125
-rw-r--r--kernel/drivers/gpio/gpio-msic.c5
-rw-r--r--kernel/drivers/gpio/gpio-msm-v2.c462
-rw-r--r--kernel/drivers/gpio/gpio-mvebu.c22
-rw-r--r--kernel/drivers/gpio/gpio-mxc.c43
-rw-r--r--kernel/drivers/gpio/gpio-mxs.c23
-rw-r--r--kernel/drivers/gpio/gpio-omap.c235
-rw-r--r--kernel/drivers/gpio/gpio-palmas.c2
-rw-r--r--kernel/drivers/gpio/gpio-pca953x.c72
-rw-r--r--kernel/drivers/gpio/gpio-pcf857x.c68
-rw-r--r--kernel/drivers/gpio/gpio-pch.c4
-rw-r--r--kernel/drivers/gpio/gpio-pl061.c114
-rw-r--r--kernel/drivers/gpio/gpio-pxa.c10
-rw-r--r--kernel/drivers/gpio/gpio-rcar.c24
-rw-r--r--kernel/drivers/gpio/gpio-sa1100.c9
-rw-r--r--kernel/drivers/gpio/gpio-sodaville.c4
-rw-r--r--kernel/drivers/gpio/gpio-sta2x11.c2
-rw-r--r--kernel/drivers/gpio/gpio-stp-xway.c29
-rw-r--r--kernel/drivers/gpio/gpio-sx150x.c32
-rw-r--r--kernel/drivers/gpio/gpio-syscon.c6
-rw-r--r--kernel/drivers/gpio/gpio-tb10x.c15
-rw-r--r--kernel/drivers/gpio/gpio-tc3589x.c10
-rw-r--r--kernel/drivers/gpio/gpio-tegra.c122
-rw-r--r--kernel/drivers/gpio/gpio-timberdale.c14
-rw-r--r--kernel/drivers/gpio/gpio-ts5500.c2
-rw-r--r--kernel/drivers/gpio/gpio-tz1090-pdc.c14
-rw-r--r--kernel/drivers/gpio/gpio-tz1090.c8
-rw-r--r--kernel/drivers/gpio/gpio-vf610.c54
-rw-r--r--kernel/drivers/gpio/gpio-xgene-sb.c22
-rw-r--r--kernel/drivers/gpio/gpio-xilinx.c8
-rw-r--r--kernel/drivers/gpio/gpio-xlp.c428
-rw-r--r--kernel/drivers/gpio/gpio-zx.c304
-rw-r--r--kernel/drivers/gpio/gpio-zynq.c238
-rw-r--r--kernel/drivers/gpio/gpiolib-acpi.c214
-rw-r--r--kernel/drivers/gpio/gpiolib-legacy.c8
-rw-r--r--kernel/drivers/gpio/gpiolib-of.c56
-rw-r--r--kernel/drivers/gpio/gpiolib-sysfs.c567
-rw-r--r--kernel/drivers/gpio/gpiolib.c416
-rw-r--r--kernel/drivers/gpio/gpiolib.h29
73 files changed, 4988 insertions, 2036 deletions
diff --git a/kernel/drivers/gpio/Kconfig b/kernel/drivers/gpio/Kconfig
index caefe806d..b18bea08f 100644
--- a/kernel/drivers/gpio/Kconfig
+++ b/kernel/drivers/gpio/Kconfig
@@ -113,19 +113,34 @@ config GPIO_74XX_MMIO
config GPIO_ALTERA
tristate "Altera GPIO"
depends on OF_GPIO
- select GPIO_GENERIC
select GPIOLIB_IRQCHIP
help
Say Y or M here to build support for the Altera PIO device.
If driver is built as a module it will be called gpio-altera.
+config GPIO_AMDPT
+ tristate "AMD Promontory GPIO support"
+ depends on ACPI
+ help
+ driver for GPIO functionality on Promontory IOHub
+ Require ACPI ASL code to enumerate as a platform device.
+
config GPIO_BCM_KONA
bool "Broadcom Kona GPIO"
depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
help
Turn on GPIO support for Broadcom "Kona" chips.
+config GPIO_BRCMSTB
+ tristate "BRCMSTB GPIO support"
+ default y if ARCH_BRCMSTB
+ depends on OF_GPIO && (ARCH_BRCMSTB || COMPILE_TEST)
+ select GPIO_GENERIC
+ select GPIOLIB_IRQCHIP
+ help
+ Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
+
config GPIO_CLPS711X
tristate "CLPS711X GPIO support"
depends on ARCH_CLPS711X || COMPILE_TEST
@@ -159,15 +174,14 @@ config GPIO_EP93XX
depends on ARCH_EP93XX
select GPIO_GENERIC
-config GPIO_F7188X
- tristate "F71869, F71869A, F71882FG and F71889F GPIO support"
- depends on X86
+config GPIO_ETRAXFS
+ bool "Axis ETRAX FS General I/O"
+ depends on CRIS || COMPILE_TEST
+ depends on OF
+ select GPIO_GENERIC
+ select GPIOLIB_IRQCHIP
help
- This option enables support for GPIOs found on Fintek Super-I/O
- chips F71869, F71869A, F71882FG and F71889F.
-
- To compile this driver as a module, choose M here: the module will
- be called f7188x-gpio.
+ Say yes here to support the GPIO controller on Axis ETRAX FS SoCs.
config GPIO_GE_FPGA
bool "GE FPGA based GPIO"
@@ -218,18 +232,20 @@ config GPIO_IOP
If unsure, say N.
-config GPIO_IT8761E
- tristate "IT8761E GPIO support"
- depends on X86 # unconditional access to IO space.
- help
- Say yes here to support GPIO functionality of IT8761E super I/O chip.
-
config GPIO_LOONGSON
bool "Loongson-2/3 GPIO support"
depends on CPU_LOONGSON2 || CPU_LOONGSON3
help
driver for GPIO functionality on Loongson-2F/3A/3B processors.
+config GPIO_LPC18XX
+ bool "NXP LPC18XX/43XX GPIO support"
+ default y if ARCH_LPC18XX
+ depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
+ help
+ Select this option to enable GPIO driver for
+ NXP LPC18XX/43XX devices.
+
config GPIO_LYNXPOINT
tristate "Intel Lynxpoint GPIO support"
depends on ACPI && X86
@@ -272,19 +288,10 @@ config GPIO_MPC8XXX
Say Y here if you're going to use hardware that connects to the
MPC512x/831x/834x/837x/8572/8610 GPIOs.
-config GPIO_MSM_V2
- tristate "Qualcomm MSM GPIO v2"
- depends on GPIOLIB && OF && ARCH_QCOM
- help
- Say yes here to support the GPIO interface on ARM v7 based
- Qualcomm MSM chips. Most of the pins on the MSM can be
- selected for GPIO, and are controlled by this driver.
-
config GPIO_MVEBU
def_bool y
depends on PLAT_ORION
depends on OF
- select GPIO_GENERIC
select GENERIC_IRQ_CHIP
config GPIO_MXC
@@ -308,7 +315,7 @@ config GPIO_OCTEON
family of SOCs.
config GPIO_OMAP
- bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS
+ tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
default y if ARCH_OMAP
depends on ARM
select GENERIC_IRQ_CHIP
@@ -332,7 +339,7 @@ config GPIO_PXA
config GPIO_RCAR
tristate "Renesas R-Car GPIO"
- depends on ARM && (ARCH_SHMOBILE || COMPILE_TEST)
+ depends on ARCH_SHMOBILE || COMPILE_TEST
select GPIOLIB_IRQCHIP
help
Say yes here to support GPIO on Renesas R-Car SoCs.
@@ -344,42 +351,6 @@ config GPIO_SAMSUNG
Legacy GPIO support. Use only for platforms without support for
pinctrl.
-config GPIO_SCH
- tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
- depends on PCI && X86
- select MFD_CORE
- select LPC_SCH
- help
- Say yes here to support GPIO interface on Intel Poulsbo SCH,
- Intel Tunnel Creek processor, Intel Centerton processor or
- Intel Quark X1000 SoC.
-
- The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
- powered by the core power rail and are turned off during sleep
- modes (S3 and higher). The remaining four GPIOs are powered by
- the Intel SCH suspend power supply. These GPIOs remain
- active during S3. The suspend powered GPIOs can be used to wake the
- system from the Suspend-to-RAM state.
-
- The Intel Tunnel Creek processor has 5 GPIOs powered by the
- core power rail and 9 from suspend power supply.
-
- The Intel Centerton processor has a total of 30 GPIO pins.
- Twenty-one are powered by the core power rail and 9 from the
- suspend power supply.
-
- The Intel Quark X1000 SoC has 2 GPIOs powered by the core
- power well and 6 from the suspend power well.
-
-config GPIO_SCH311X
- tristate "SMSC SCH311x SuperI/O GPIO"
- help
- Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
- SCH3116 "Super I/O" chipsets.
-
- To compile this driver as a module, choose M here: the module will
- be called gpio-sch311x.
-
config GPIO_SPEAR_SPICS
bool "ST SPEAr13xx SPI Chip Select as GPIO support"
depends on PLAT_SPEAR
@@ -416,15 +387,6 @@ config GPIO_TB10X
select GENERIC_IRQ_CHIP
select OF_GPIO
-config GPIO_TS5500
- tristate "TS-5500 DIO blocks and compatibles"
- depends on TS5500 || COMPILE_TEST
- help
- This driver supports Digital I/O exposed by pin blocks found on some
- Technologic Systems platforms. It includes, but is not limited to, 3
- blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
- LCD port.
-
config GPIO_TZ1090
bool "Toumaz Xenif TZ1090 GPIO support"
depends on SOC_TZ1090
@@ -484,10 +446,21 @@ config GPIO_XGENE_SB
config GPIO_XILINX
tristate "Xilinx GPIO support"
- depends on OF_GPIO && (PPC || MICROBLAZE || ARCH_ZYNQ || X86)
+ depends on OF_GPIO
help
Say yes here to support the Xilinx FPGA GPIO device
+config GPIO_XLP
+ tristate "Netlogic XLP GPIO support"
+ depends on CPU_XLP && OF_GPIO
+ select GPIOLIB_IRQCHIP
+ help
+ This driver provides support for GPIO interface on Netlogic XLP MIPS64
+ SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
+ XLP9XX and XLP5XX.
+
+ If unsure, say N.
+
config GPIO_XTENSA
bool "Xtensa GPIO32 support"
depends on XTENSA
@@ -505,11 +478,92 @@ config GPIO_ZEVIO
config GPIO_ZYNQ
tristate "Xilinx Zynq GPIO support"
- depends on ARCH_ZYNQ
+ depends on ARCH_ZYNQ || ARCH_ZYNQMP
select GPIOLIB_IRQCHIP
help
Say yes here to support Xilinx Zynq GPIO controller.
+config GPIO_ZX
+ bool "ZTE ZX GPIO support"
+ select GPIOLIB_IRQCHIP
+ help
+ Say yes here to support the GPIO device on ZTE ZX SoCs.
+
+endmenu
+
+menu "Port-mapped I/O GPIO drivers"
+ depends on X86 # Unconditional I/O space access
+
+config GPIO_104_IDIO_16
+ tristate "ACCES 104-IDIO-16 GPIO support"
+ help
+ Enables GPIO support for the ACCES 104-IDIO-16 family.
+
+config GPIO_F7188X
+ tristate "F71869, F71869A, F71882FG and F71889F GPIO support"
+ help
+ This option enables support for GPIOs found on Fintek Super-I/O
+ chips F71869, F71869A, F71882FG and F71889F.
+
+ To compile this driver as a module, choose M here: the module will
+ be called f7188x-gpio.
+
+config GPIO_IT87
+ tristate "IT87xx GPIO support"
+ help
+ Say yes here to support GPIO functionality of IT87xx Super I/O chips.
+
+ This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
+ supports the IT8761E Super I/O chip as well.
+
+ To compile this driver as a module, choose M here: the module will
+ be called gpio_it87
+
+config GPIO_SCH
+ tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
+ depends on PCI
+ select MFD_CORE
+ select LPC_SCH
+ help
+ Say yes here to support GPIO interface on Intel Poulsbo SCH,
+ Intel Tunnel Creek processor, Intel Centerton processor or
+ Intel Quark X1000 SoC.
+
+ The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
+ powered by the core power rail and are turned off during sleep
+ modes (S3 and higher). The remaining four GPIOs are powered by
+ the Intel SCH suspend power supply. These GPIOs remain
+ active during S3. The suspend powered GPIOs can be used to wake the
+ system from the Suspend-to-RAM state.
+
+ The Intel Tunnel Creek processor has 5 GPIOs powered by the
+ core power rail and 9 from suspend power supply.
+
+ The Intel Centerton processor has a total of 30 GPIO pins.
+ Twenty-one are powered by the core power rail and 9 from the
+ suspend power supply.
+
+ The Intel Quark X1000 SoC has 2 GPIOs powered by the core
+ power well and 6 from the suspend power well.
+
+config GPIO_SCH311X
+ tristate "SMSC SCH311x SuperI/O GPIO"
+ help
+ Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
+ SCH3116 "Super I/O" chipsets.
+
+ To compile this driver as a module, choose M here: the module will
+ be called gpio-sch311x.
+
+config GPIO_TS5500
+ tristate "TS-5500 DIO blocks and compatibles"
+ depends on TS5500 || COMPILE_TEST
+ help
+ This driver supports Digital I/O exposed by pin blocks found on some
+ Technologic Systems platforms. It includes, but is not limited to, 3
+ blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
+ LCD port.
+
endmenu
menu "I2C GPIO expanders"
@@ -517,7 +571,6 @@ menu "I2C GPIO expanders"
config GPIO_ADP5588
tristate "ADP5588 I2C GPIO expander"
- depends on I2C
help
This option enables support for 18 GPIOs found
on Analog Devices ADP5588 GPIO Expanders.
@@ -531,7 +584,7 @@ config GPIO_ADP5588_IRQ
config GPIO_ADNP
tristate "Avionic Design N-bit GPIO expander"
- depends on I2C && OF_GPIO
+ depends on OF_GPIO
select GPIOLIB_IRQCHIP
help
This option enables support for N GPIOs found on Avionic Design
@@ -543,14 +596,12 @@ config GPIO_ADNP
config GPIO_MAX7300
tristate "Maxim MAX7300 GPIO expander"
- depends on I2C
select GPIO_MAX730X
help
GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
config GPIO_MAX732X
tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
- depends on I2C
help
Say yes here to support the MAX7319, MAX7320-7327 series of I2C
Port Expanders. Each IO port on these chips has a fixed role of
@@ -583,7 +634,6 @@ config GPIO_MC9S08DZ60
config GPIO_PCA953X
tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
- depends on I2C
help
Say yes here to provide access to several register-oriented
SMBus I/O expanders, made mostly by NXP or TI. Compatible
@@ -611,7 +661,6 @@ config GPIO_PCA953X_IRQ
config GPIO_PCF857X
tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
- depends on I2C
select GPIOLIB_IRQCHIP
select IRQ_DOMAIN
help
@@ -941,7 +990,7 @@ menu "SPI GPIO expanders"
config GPIO_74X164
tristate "74x164 serial-in/parallel-out 8-bits shift register"
- depends on SPI_MASTER && OF
+ depends on OF
help
Driver for 74x164 compatible serial-in/parallel-out 8-outputs
shift registers. This driver can be used to provide access
@@ -949,27 +998,29 @@ config GPIO_74X164
config GPIO_MAX7301
tristate "Maxim MAX7301 GPIO expander"
- depends on SPI_MASTER
select GPIO_MAX730X
help
GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
+config GPIO_MC33880
+ tristate "Freescale MC33880 high-side/low-side switch"
+ help
+ SPI driver for Freescale MC33880 high-side/low-side switch.
+ This provides GPIO interface supporting inputs and outputs.
+
+endmenu
+
+menu "SPI or I2C GPIO expanders"
+ depends on (SPI_MASTER && !I2C) || I2C
+
config GPIO_MCP23S08
tristate "Microchip MCP23xxx I/O expander"
- depends on (SPI_MASTER && !I2C) || I2C
help
SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
I/O expanders.
This provides a GPIO interface supporting inputs and outputs.
The I2C versions of the chips can be used as interrupt-controller.
-config GPIO_MC33880
- tristate "Freescale MC33880 high-side/low-side switch"
- depends on SPI_MASTER
- help
- SPI driver for Freescale MC33880 high-side/low-side switch.
- This provides GPIO interface supporting inputs and outputs.
-
endmenu
menu "USB GPIO expanders"
diff --git a/kernel/drivers/gpio/Makefile b/kernel/drivers/gpio/Makefile
index f71bb9713..986dbd838 100644
--- a/kernel/drivers/gpio/Makefile
+++ b/kernel/drivers/gpio/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o
# Device drivers. Generally keep list sorted alphabetically
obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o
+obj-$(CONFIG_GPIO_104_IDIO_16) += gpio-104-idio-16.o
obj-$(CONFIG_GPIO_74X164) += gpio-74x164.o
obj-$(CONFIG_GPIO_74XX_MMIO) += gpio-74xx-mmio.o
obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o
@@ -19,8 +20,11 @@ obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o
obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o
obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o
+obj-$(CONFIG_GPIO_AMDPT) += gpio-amdpt.o
obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o
+obj-$(CONFIG_ATH79) += gpio-ath79.o
obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o
+obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o
obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
@@ -32,18 +36,20 @@ obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o
obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o
obj-$(CONFIG_GPIO_EM) += gpio-em.o
obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
+obj-$(CONFIG_GPIO_ETRAXFS) += gpio-etraxfs.o
obj-$(CONFIG_GPIO_F7188X) += gpio-f7188x.o
obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o
obj-$(CONFIG_GPIO_GRGPIO) += gpio-grgpio.o
obj-$(CONFIG_GPIO_ICH) += gpio-ich.o
obj-$(CONFIG_GPIO_IOP) += gpio-iop.o
-obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o
+obj-$(CONFIG_GPIO_IT87) += gpio-it87.o
obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o
obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o
obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o
obj-$(CONFIG_GPIO_INTEL_MID) += gpio-intel-mid.o
obj-$(CONFIG_GPIO_LOONGSON) += gpio-loongson.o
obj-$(CONFIG_GPIO_LP3943) += gpio-lp3943.o
+obj-$(CONFIG_GPIO_LPC18XX) += gpio-lpc18xx.o
obj-$(CONFIG_ARCH_LPC32XX) += gpio-lpc32xx.o
obj-$(CONFIG_GPIO_LYNXPOINT) += gpio-lynxpoint.o
obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o
@@ -60,7 +66,6 @@ obj-$(CONFIG_GPIO_MOXART) += gpio-moxart.o
obj-$(CONFIG_GPIO_MPC5200) += gpio-mpc5200.o
obj-$(CONFIG_GPIO_MPC8XXX) += gpio-mpc8xxx.o
obj-$(CONFIG_GPIO_MSIC) += gpio-msic.o
-obj-$(CONFIG_GPIO_MSM_V2) += gpio-msm-v2.o
obj-$(CONFIG_GPIO_MVEBU) += gpio-mvebu.o
obj-$(CONFIG_GPIO_MXC) += gpio-mxc.o
obj-$(CONFIG_GPIO_MXS) += gpio-mxs.o
@@ -109,6 +114,8 @@ obj-$(CONFIG_GPIO_WM8994) += gpio-wm8994.o
obj-$(CONFIG_GPIO_XGENE) += gpio-xgene.o
obj-$(CONFIG_GPIO_XGENE_SB) += gpio-xgene-sb.o
obj-$(CONFIG_GPIO_XILINX) += gpio-xilinx.o
+obj-$(CONFIG_GPIO_XLP) += gpio-xlp.o
obj-$(CONFIG_GPIO_XTENSA) += gpio-xtensa.o
obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o
obj-$(CONFIG_GPIO_ZYNQ) += gpio-zynq.o
+obj-$(CONFIG_GPIO_ZX) += gpio-zx.o
diff --git a/kernel/drivers/gpio/devres.c b/kernel/drivers/gpio/devres.c
index 07ba82317..903fcf4d0 100644
--- a/kernel/drivers/gpio/devres.c
+++ b/kernel/drivers/gpio/devres.c
@@ -59,13 +59,13 @@ static int devm_gpiod_match_array(struct device *dev, void *res, void *data)
* automatically disposed on driver detach. See gpiod_get() for detailed
* information about behavior and return values.
*/
-struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
+struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
const char *con_id,
enum gpiod_flags flags)
{
return devm_gpiod_get_index(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL(__devm_gpiod_get);
+EXPORT_SYMBOL(devm_gpiod_get);
/**
* devm_gpiod_get_optional - Resource-managed gpiod_get_optional()
@@ -77,13 +77,13 @@ EXPORT_SYMBOL(__devm_gpiod_get);
* are automatically disposed on driver detach. See gpiod_get_optional() for
* detailed information about behavior and return values.
*/
-struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
+struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
const char *con_id,
enum gpiod_flags flags)
{
return devm_gpiod_get_index_optional(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL(__devm_gpiod_get_optional);
+EXPORT_SYMBOL(devm_gpiod_get_optional);
/**
* devm_gpiod_get_index - Resource-managed gpiod_get_index()
@@ -96,7 +96,7 @@ EXPORT_SYMBOL(__devm_gpiod_get_optional);
* automatically disposed on driver detach. See gpiod_get_index() for detailed
* information about behavior and return values.
*/
-struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
const char *con_id,
unsigned int idx,
enum gpiod_flags flags)
@@ -120,7 +120,7 @@ struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
return desc;
}
-EXPORT_SYMBOL(__devm_gpiod_get_index);
+EXPORT_SYMBOL(devm_gpiod_get_index);
/**
* devm_get_gpiod_from_child - get a GPIO descriptor from a device's child node
@@ -182,10 +182,10 @@ EXPORT_SYMBOL(devm_get_gpiod_from_child);
* gpiod_get_index_optional() for detailed information about behavior and
* return values.
*/
-struct gpio_desc *__must_check __devm_gpiod_get_index_optional(struct device *dev,
+struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev,
const char *con_id,
unsigned int index,
- enum gpiod_flags flags)
+ enum gpiod_flags flags)
{
struct gpio_desc *desc;
@@ -197,7 +197,7 @@ struct gpio_desc *__must_check __devm_gpiod_get_index_optional(struct device *de
return desc;
}
-EXPORT_SYMBOL(__devm_gpiod_get_index_optional);
+EXPORT_SYMBOL(devm_gpiod_get_index_optional);
/**
* devm_gpiod_get_array - Resource-managed gpiod_get_array()
diff --git a/kernel/drivers/gpio/gpio-104-idio-16.c b/kernel/drivers/gpio/gpio-104-idio-16.c
new file mode 100644
index 000000000..5400d7d4d
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-104-idio-16.c
@@ -0,0 +1,216 @@
+/*
+ * GPIO driver for the ACCES 104-IDIO-16 family
+ * Copyright (C) 2015 William Breathitt Gray
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+static unsigned idio_16_base;
+module_param(idio_16_base, uint, 0);
+MODULE_PARM_DESC(idio_16_base, "ACCES 104-IDIO-16 base address");
+
+/**
+ * struct idio_16_gpio - GPIO device private data structure
+ * @chip: instance of the gpio_chip
+ * @lock: synchronization lock to prevent gpio_set race conditions
+ * @base: base port address of the GPIO device
+ * @extent: extent of port address region of the GPIO device
+ * @out_state: output bits state
+ */
+struct idio_16_gpio {
+ struct gpio_chip chip;
+ spinlock_t lock;
+ unsigned base;
+ unsigned extent;
+ unsigned out_state;
+};
+
+static int idio_16_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+{
+ if (offset > 15)
+ return 1;
+
+ return 0;
+}
+
+static int idio_16_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ return 0;
+}
+
+static int idio_16_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ chip->set(chip, offset, value);
+ return 0;
+}
+
+static struct idio_16_gpio *to_idio16gpio(struct gpio_chip *gc)
+{
+ return container_of(gc, struct idio_16_gpio, chip);
+}
+
+static int idio_16_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct idio_16_gpio *const idio16gpio = to_idio16gpio(chip);
+ const unsigned BIT_MASK = 1U << (offset-16);
+
+ if (offset < 16)
+ return -EINVAL;
+
+ if (offset < 24)
+ return !!(inb(idio16gpio->base + 1) & BIT_MASK);
+
+ return !!(inb(idio16gpio->base + 5) & (BIT_MASK>>8));
+}
+
+static void idio_16_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct idio_16_gpio *const idio16gpio = to_idio16gpio(chip);
+ const unsigned BIT_MASK = 1U << offset;
+ unsigned long flags;
+
+ if (offset > 15)
+ return;
+
+ spin_lock_irqsave(&idio16gpio->lock, flags);
+
+ if (value)
+ idio16gpio->out_state |= BIT_MASK;
+ else
+ idio16gpio->out_state &= ~BIT_MASK;
+
+ if (offset > 7)
+ outb(idio16gpio->out_state >> 8, idio16gpio->base + 4);
+ else
+ outb(idio16gpio->out_state, idio16gpio->base);
+
+ spin_unlock_irqrestore(&idio16gpio->lock, flags);
+}
+
+static int __init idio_16_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct idio_16_gpio *idio16gpio;
+ int err;
+
+ const unsigned BASE = idio_16_base;
+ const unsigned EXTENT = 8;
+ const char *const NAME = dev_name(dev);
+
+ idio16gpio = devm_kzalloc(dev, sizeof(*idio16gpio), GFP_KERNEL);
+ if (!idio16gpio)
+ return -ENOMEM;
+
+ if (!request_region(BASE, EXTENT, NAME)) {
+ dev_err(dev, "Unable to lock %s port addresses (0x%X-0x%X)\n",
+ NAME, BASE, BASE + EXTENT);
+ err = -EBUSY;
+ goto err_lock_io_port;
+ }
+
+ idio16gpio->chip.label = NAME;
+ idio16gpio->chip.dev = dev;
+ idio16gpio->chip.owner = THIS_MODULE;
+ idio16gpio->chip.base = -1;
+ idio16gpio->chip.ngpio = 32;
+ idio16gpio->chip.get_direction = idio_16_gpio_get_direction;
+ idio16gpio->chip.direction_input = idio_16_gpio_direction_input;
+ idio16gpio->chip.direction_output = idio_16_gpio_direction_output;
+ idio16gpio->chip.get = idio_16_gpio_get;
+ idio16gpio->chip.set = idio_16_gpio_set;
+ idio16gpio->base = BASE;
+ idio16gpio->extent = EXTENT;
+ idio16gpio->out_state = 0xFFFF;
+
+ spin_lock_init(&idio16gpio->lock);
+
+ dev_set_drvdata(dev, idio16gpio);
+
+ err = gpiochip_add(&idio16gpio->chip);
+ if (err) {
+ dev_err(dev, "GPIO registering failed (%d)\n", err);
+ goto err_gpio_register;
+ }
+
+ return 0;
+
+err_gpio_register:
+ release_region(BASE, EXTENT);
+err_lock_io_port:
+ return err;
+}
+
+static int idio_16_remove(struct platform_device *pdev)
+{
+ struct idio_16_gpio *const idio16gpio = platform_get_drvdata(pdev);
+
+ gpiochip_remove(&idio16gpio->chip);
+ release_region(idio16gpio->base, idio16gpio->extent);
+
+ return 0;
+}
+
+static struct platform_device *idio_16_device;
+
+static struct platform_driver idio_16_driver = {
+ .driver = {
+ .name = "104-idio-16"
+ },
+ .remove = idio_16_remove
+};
+
+static void __exit idio_16_exit(void)
+{
+ platform_device_unregister(idio_16_device);
+ platform_driver_unregister(&idio_16_driver);
+}
+
+static int __init idio_16_init(void)
+{
+ int err;
+
+ idio_16_device = platform_device_alloc(idio_16_driver.driver.name, -1);
+ if (!idio_16_device)
+ return -ENOMEM;
+
+ err = platform_device_add(idio_16_device);
+ if (err)
+ goto err_platform_device;
+
+ err = platform_driver_probe(&idio_16_driver, idio_16_probe);
+ if (err)
+ goto err_platform_driver;
+
+ return 0;
+
+err_platform_driver:
+ platform_device_del(idio_16_device);
+err_platform_device:
+ platform_device_put(idio_16_device);
+ return err;
+}
+
+module_init(idio_16_init);
+module_exit(idio_16_exit);
+
+MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
+MODULE_DESCRIPTION("ACCES 104-IDIO-16 GPIO driver");
+MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/gpio/gpio-74x164.c b/kernel/drivers/gpio/gpio-74x164.c
index e3d968f75..60172f835 100644
--- a/kernel/drivers/gpio/gpio-74x164.c
+++ b/kernel/drivers/gpio/gpio-74x164.c
@@ -183,7 +183,6 @@ MODULE_DEVICE_TABLE(of, gen_74x164_dt_ids);
static struct spi_driver gen_74x164_driver = {
.driver = {
.name = "74x164",
- .owner = THIS_MODULE,
.of_match_table = gen_74x164_dt_ids,
},
.probe = gen_74x164_probe,
diff --git a/kernel/drivers/gpio/gpio-74xx-mmio.c b/kernel/drivers/gpio/gpio-74xx-mmio.c
index 0763655cc..6b1868290 100644
--- a/kernel/drivers/gpio/gpio-74xx-mmio.c
+++ b/kernel/drivers/gpio/gpio-74xx-mmio.c
@@ -113,13 +113,16 @@ static int mmio_74xx_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
static int mmio_74xx_gpio_probe(struct platform_device *pdev)
{
- const struct of_device_id *of_id =
- of_match_device(mmio_74xx_gpio_ids, &pdev->dev);
+ const struct of_device_id *of_id;
struct mmio_74xx_gpio_priv *priv;
struct resource *res;
void __iomem *dat;
int err;
+ of_id = of_match_device(mmio_74xx_gpio_ids, &pdev->dev);
+ if (!of_id)
+ return -ENODEV;
+
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@@ -129,7 +132,7 @@ static int mmio_74xx_gpio_probe(struct platform_device *pdev)
if (IS_ERR(dat))
return PTR_ERR(dat);
- priv->flags = (unsigned)of_id->data;
+ priv->flags = (uintptr_t) of_id->data;
err = bgpio_init(&priv->bgc, &pdev->dev,
DIV_ROUND_UP(MMIO_74XX_BIT_CNT(priv->flags), 8),
diff --git a/kernel/drivers/gpio/gpio-adp5588.c b/kernel/drivers/gpio/gpio-adp5588.c
index d3fe6a677..984186ee5 100644
--- a/kernel/drivers/gpio/gpio-adp5588.c
+++ b/kernel/drivers/gpio/gpio-adp5588.c
@@ -305,15 +305,7 @@ static int adp5588_irq_setup(struct adp5588_gpio *dev)
irq_set_chip_and_handler(irq, &adp5588_irq_chip,
handle_level_irq);
irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
- /*
- * ARM needs us to explicitly flag the IRQ as VALID,
- * once we do so, it will also set the noprobe.
- */
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
+ irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
}
ret = request_threaded_irq(client->irq,
diff --git a/kernel/drivers/gpio/gpio-altera.c b/kernel/drivers/gpio/gpio-altera.c
index 449fb46cb..3e6661bab 100644
--- a/kernel/drivers/gpio/gpio-altera.c
+++ b/kernel/drivers/gpio/gpio-altera.c
@@ -42,6 +42,11 @@ struct altera_gpio_chip {
int mapped_irq;
};
+static struct altera_gpio_chip *to_altera(struct gpio_chip *gc)
+{
+ return container_of(gc, struct altera_gpio_chip, mmchip.gc);
+}
+
static void altera_gpio_irq_unmask(struct irq_data *d)
{
struct altera_gpio_chip *altera_gc;
@@ -49,7 +54,7 @@ static void altera_gpio_irq_unmask(struct irq_data *d)
unsigned long flags;
u32 intmask;
- altera_gc = irq_data_get_irq_chip_data(d);
+ altera_gc = to_altera(irq_data_get_irq_chip_data(d));
mm_gc = &altera_gc->mmchip;
spin_lock_irqsave(&altera_gc->gpio_lock, flags);
@@ -67,7 +72,7 @@ static void altera_gpio_irq_mask(struct irq_data *d)
unsigned long flags;
u32 intmask;
- altera_gc = irq_data_get_irq_chip_data(d);
+ altera_gc = to_altera(irq_data_get_irq_chip_data(d));
mm_gc = &altera_gc->mmchip;
spin_lock_irqsave(&altera_gc->gpio_lock, flags);
@@ -87,7 +92,7 @@ static int altera_gpio_irq_set_type(struct irq_data *d,
{
struct altera_gpio_chip *altera_gc;
- altera_gc = irq_data_get_irq_chip_data(d);
+ altera_gc = to_altera(irq_data_get_irq_chip_data(d));
if (type == IRQ_TYPE_NONE)
return 0;
@@ -107,7 +112,8 @@ static int altera_gpio_irq_set_type(struct irq_data *d,
return -EINVAL;
}
-static unsigned int altera_gpio_irq_startup(struct irq_data *d) {
+static unsigned int altera_gpio_irq_startup(struct irq_data *d)
+{
altera_gpio_irq_unmask(d);
return 0;
@@ -200,8 +206,7 @@ static int altera_gpio_direction_output(struct gpio_chip *gc,
return 0;
}
-static void altera_gpio_irq_edge_handler(unsigned int irq,
- struct irq_desc *desc)
+static void altera_gpio_irq_edge_handler(struct irq_desc *desc)
{
struct altera_gpio_chip *altera_gc;
struct irq_chip *chip;
@@ -210,7 +215,7 @@ static void altera_gpio_irq_edge_handler(unsigned int irq,
unsigned long status;
int i;
- altera_gc = irq_desc_get_handler_data(desc);
+ altera_gc = to_altera(irq_desc_get_handler_data(desc));
chip = irq_desc_get_chip(desc);
mm_gc = &altera_gc->mmchip;
irqdomain = altera_gc->mmchip.gc.irqdomain;
@@ -230,8 +235,7 @@ static void altera_gpio_irq_edge_handler(unsigned int irq,
}
-static void altera_gpio_irq_leveL_high_handler(unsigned int irq,
- struct irq_desc *desc)
+static void altera_gpio_irq_leveL_high_handler(struct irq_desc *desc)
{
struct altera_gpio_chip *altera_gc;
struct irq_chip *chip;
@@ -240,7 +244,7 @@ static void altera_gpio_irq_leveL_high_handler(unsigned int irq,
unsigned long status;
int i;
- altera_gc = irq_desc_get_handler_data(desc);
+ altera_gc = to_altera(irq_desc_get_handler_data(desc));
chip = irq_desc_get_chip(desc);
mm_gc = &altera_gc->mmchip;
irqdomain = altera_gc->mmchip.gc.irqdomain;
@@ -337,9 +341,9 @@ static int altera_gpio_remove(struct platform_device *pdev)
{
struct altera_gpio_chip *altera_gc = platform_get_drvdata(pdev);
- gpiochip_remove(&altera_gc->mmchip.gc);
+ of_mm_gpiochip_remove(&altera_gc->mmchip);
- return -EIO;
+ return 0;
}
static const struct of_device_id altera_gpio_of_match[] = {
diff --git a/kernel/drivers/gpio/gpio-amdpt.c b/kernel/drivers/gpio/gpio-amdpt.c
new file mode 100644
index 000000000..cbbb966d4
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-amdpt.c
@@ -0,0 +1,261 @@
+/*
+ * AMD Promontory GPIO driver
+ *
+ * Copyright (C) 2015 ASMedia Technology Inc.
+ * Author: YD Tseng <yd_tseng@asmedia.com.tw>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/gpio/driver.h>
+#include <linux/spinlock.h>
+#include <linux/acpi.h>
+#include <linux/platform_device.h>
+
+#define PT_TOTAL_GPIO 8
+
+/* PCI-E MMIO register offsets */
+#define PT_DIRECTION_REG 0x00
+#define PT_INPUTDATA_REG 0x04
+#define PT_OUTPUTDATA_REG 0x08
+#define PT_CLOCKRATE_REG 0x0C
+#define PT_SYNC_REG 0x28
+
+struct pt_gpio_chip {
+ struct gpio_chip gc;
+ void __iomem *reg_base;
+ spinlock_t lock;
+};
+
+#define to_pt_gpio(c) container_of(c, struct pt_gpio_chip, gc)
+
+static int pt_gpio_request(struct gpio_chip *gc, unsigned offset)
+{
+ struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc);
+ unsigned long flags;
+ u32 using_pins;
+
+ dev_dbg(gc->dev, "pt_gpio_request offset=%x\n", offset);
+
+ spin_lock_irqsave(&pt_gpio->lock, flags);
+
+ using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
+ if (using_pins & BIT(offset)) {
+ dev_warn(gc->dev, "PT GPIO pin %x reconfigured\n",
+ offset);
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+ return -EINVAL;
+ }
+
+ writel(using_pins | BIT(offset), pt_gpio->reg_base + PT_SYNC_REG);
+
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+
+ return 0;
+}
+
+static void pt_gpio_free(struct gpio_chip *gc, unsigned offset)
+{
+ struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc);
+ unsigned long flags;
+ u32 using_pins;
+
+ spin_lock_irqsave(&pt_gpio->lock, flags);
+
+ using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
+ using_pins &= ~BIT(offset);
+ writel(using_pins, pt_gpio->reg_base + PT_SYNC_REG);
+
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+
+ dev_dbg(gc->dev, "pt_gpio_free offset=%x\n", offset);
+}
+
+static void pt_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
+{
+ struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc);
+ unsigned long flags;
+ u32 data;
+
+ dev_dbg(gc->dev, "pt_gpio_set_value offset=%x, value=%x\n",
+ offset, value);
+
+ spin_lock_irqsave(&pt_gpio->lock, flags);
+
+ data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG);
+ data &= ~BIT(offset);
+ if (value)
+ data |= BIT(offset);
+ writel(data, pt_gpio->reg_base + PT_OUTPUTDATA_REG);
+
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+}
+
+static int pt_gpio_get_value(struct gpio_chip *gc, unsigned offset)
+{
+ struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc);
+ unsigned long flags;
+ u32 data;
+
+ spin_lock_irqsave(&pt_gpio->lock, flags);
+
+ data = readl(pt_gpio->reg_base + PT_DIRECTION_REG);
+
+ /* configure as output */
+ if (data & BIT(offset))
+ data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG);
+ else /* configure as input */
+ data = readl(pt_gpio->reg_base + PT_INPUTDATA_REG);
+
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+
+ data >>= offset;
+ data &= 1;
+
+ dev_dbg(gc->dev, "pt_gpio_get_value offset=%x, value=%x\n",
+ offset, data);
+
+ return data;
+}
+
+static int pt_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc);
+ unsigned long flags;
+ u32 data;
+
+ dev_dbg(gc->dev, "pt_gpio_dirction_input offset=%x\n", offset);
+
+ spin_lock_irqsave(&pt_gpio->lock, flags);
+
+ data = readl(pt_gpio->reg_base + PT_DIRECTION_REG);
+ data &= ~BIT(offset);
+ writel(data, pt_gpio->reg_base + PT_DIRECTION_REG);
+
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+
+ return 0;
+}
+
+static int pt_gpio_direction_output(struct gpio_chip *gc,
+ unsigned offset, int value)
+{
+ struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc);
+ unsigned long flags;
+ u32 data;
+
+ dev_dbg(gc->dev, "pt_gpio_direction_output offset=%x, value=%x\n",
+ offset, value);
+
+ spin_lock_irqsave(&pt_gpio->lock, flags);
+
+ data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG);
+ if (value)
+ data |= BIT(offset);
+ else
+ data &= ~BIT(offset);
+ writel(data, pt_gpio->reg_base + PT_OUTPUTDATA_REG);
+
+ data = readl(pt_gpio->reg_base + PT_DIRECTION_REG);
+ data |= BIT(offset);
+ writel(data, pt_gpio->reg_base + PT_DIRECTION_REG);
+
+ spin_unlock_irqrestore(&pt_gpio->lock, flags);
+
+ return 0;
+}
+
+static int pt_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct acpi_device *acpi_dev;
+ acpi_handle handle = ACPI_HANDLE(dev);
+ struct pt_gpio_chip *pt_gpio;
+ struct resource *res_mem;
+ int ret = 0;
+
+ if (acpi_bus_get_device(handle, &acpi_dev)) {
+ dev_err(dev, "PT GPIO device node not found\n");
+ return -ENODEV;
+ }
+
+ pt_gpio = devm_kzalloc(dev, sizeof(struct pt_gpio_chip), GFP_KERNEL);
+ if (!pt_gpio)
+ return -ENOMEM;
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res_mem) {
+ dev_err(&pdev->dev, "Failed to get MMIO resource for PT GPIO.\n");
+ return -EINVAL;
+ }
+ pt_gpio->reg_base = devm_ioremap_resource(dev, res_mem);
+ if (IS_ERR(pt_gpio->reg_base)) {
+ dev_err(&pdev->dev, "Failed to map MMIO resource for PT GPIO.\n");
+ return PTR_ERR(pt_gpio->reg_base);
+ }
+
+ spin_lock_init(&pt_gpio->lock);
+
+ pt_gpio->gc.label = pdev->name;
+ pt_gpio->gc.owner = THIS_MODULE;
+ pt_gpio->gc.dev = dev;
+ pt_gpio->gc.request = pt_gpio_request;
+ pt_gpio->gc.free = pt_gpio_free;
+ pt_gpio->gc.direction_input = pt_gpio_direction_input;
+ pt_gpio->gc.direction_output = pt_gpio_direction_output;
+ pt_gpio->gc.get = pt_gpio_get_value;
+ pt_gpio->gc.set = pt_gpio_set_value;
+ pt_gpio->gc.base = -1;
+ pt_gpio->gc.ngpio = PT_TOTAL_GPIO;
+#if defined(CONFIG_OF_GPIO)
+ pt_gpio->gc.of_node = pdev->dev.of_node;
+#endif
+ ret = gpiochip_add(&pt_gpio->gc);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register GPIO lib\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, pt_gpio);
+
+ /* initialize register setting */
+ writel(0, pt_gpio->reg_base + PT_SYNC_REG);
+ writel(0, pt_gpio->reg_base + PT_CLOCKRATE_REG);
+
+ dev_dbg(&pdev->dev, "PT GPIO driver loaded\n");
+ return ret;
+}
+
+static int pt_gpio_remove(struct platform_device *pdev)
+{
+ struct pt_gpio_chip *pt_gpio = platform_get_drvdata(pdev);
+
+ gpiochip_remove(&pt_gpio->gc);
+
+ return 0;
+}
+
+static const struct acpi_device_id pt_gpio_acpi_match[] = {
+ { "AMDF030", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, pt_gpio_acpi_match);
+
+static struct platform_driver pt_gpio_driver = {
+ .driver = {
+ .name = "pt-gpio",
+ .acpi_match_table = ACPI_PTR(pt_gpio_acpi_match),
+ },
+ .probe = pt_gpio_probe,
+ .remove = pt_gpio_remove,
+};
+
+module_platform_driver(pt_gpio_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("YD Tseng <yd_tseng@asmedia.com.tw>");
+MODULE_DESCRIPTION("AMD Promontory GPIO Driver");
diff --git a/kernel/drivers/gpio/gpio-arizona.c b/kernel/drivers/gpio/gpio-arizona.c
index 052fbc8fd..ca0027396 100644
--- a/kernel/drivers/gpio/gpio-arizona.c
+++ b/kernel/drivers/gpio/gpio-arizona.c
@@ -118,6 +118,8 @@ static int arizona_gpio_probe(struct platform_device *pdev)
case WM5110:
case WM8280:
case WM8997:
+ case WM8998:
+ case WM1814:
arizona_gpio->gpio_chip.ngpio = 5;
break;
default:
diff --git a/kernel/drivers/gpio/gpio-ath79.c b/kernel/drivers/gpio/gpio-ath79.c
new file mode 100644
index 000000000..5eaea8b81
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-ath79.c
@@ -0,0 +1,205 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X GPIO API support
+ *
+ * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/platform_data/gpio-ath79.h>
+#include <linux/of_device.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+struct ath79_gpio_ctrl {
+ struct gpio_chip chip;
+ void __iomem *base;
+ spinlock_t lock;
+};
+
+#define to_ath79_gpio_ctrl(c) container_of(c, struct ath79_gpio_ctrl, chip)
+
+static void ath79_gpio_set_value(struct gpio_chip *chip,
+ unsigned gpio, int value)
+{
+ struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
+
+ if (value)
+ __raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_SET);
+ else
+ __raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_CLEAR);
+}
+
+static int ath79_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+ struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
+
+ return (__raw_readl(ctrl->base + AR71XX_GPIO_REG_IN) >> gpio) & 1;
+}
+
+static int ath79_gpio_direction_input(struct gpio_chip *chip,
+ unsigned offset)
+{
+ struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+
+ __raw_writel(
+ __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & ~BIT(offset),
+ ctrl->base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return 0;
+}
+
+static int ath79_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+
+ if (value)
+ __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET);
+ else
+ __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR);
+
+ __raw_writel(
+ __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset),
+ ctrl->base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return 0;
+}
+
+static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+
+ __raw_writel(
+ __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset),
+ ctrl->base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return 0;
+}
+
+static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+ int value)
+{
+ struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->lock, flags);
+
+ if (value)
+ __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET);
+ else
+ __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR);
+
+ __raw_writel(
+ __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & ~BIT(offset),
+ ctrl->base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ctrl->lock, flags);
+
+ return 0;
+}
+
+static const struct gpio_chip ath79_gpio_chip = {
+ .label = "ath79",
+ .get = ath79_gpio_get_value,
+ .set = ath79_gpio_set_value,
+ .direction_input = ath79_gpio_direction_input,
+ .direction_output = ath79_gpio_direction_output,
+ .base = 0,
+};
+
+static const struct of_device_id ath79_gpio_of_match[] = {
+ { .compatible = "qca,ar7100-gpio" },
+ { .compatible = "qca,ar9340-gpio" },
+ {},
+};
+
+static int ath79_gpio_probe(struct platform_device *pdev)
+{
+ struct ath79_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
+ struct ath79_gpio_ctrl *ctrl;
+ struct resource *res;
+ u32 ath79_gpio_count;
+ bool oe_inverted;
+ int err;
+
+ ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return -ENOMEM;
+
+ if (np) {
+ err = of_property_read_u32(np, "ngpios", &ath79_gpio_count);
+ if (err) {
+ dev_err(&pdev->dev, "ngpios property is not valid\n");
+ return err;
+ }
+ if (ath79_gpio_count >= 32) {
+ dev_err(&pdev->dev, "ngpios must be less than 32\n");
+ return -EINVAL;
+ }
+ oe_inverted = of_device_is_compatible(np, "qca,ar9340-gpio");
+ } else if (pdata) {
+ ath79_gpio_count = pdata->ngpios;
+ oe_inverted = pdata->oe_inverted;
+ } else {
+ dev_err(&pdev->dev, "No DT node or platform data found\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctrl->base = devm_ioremap_nocache(
+ &pdev->dev, res->start, resource_size(res));
+ if (!ctrl->base)
+ return -ENOMEM;
+
+ spin_lock_init(&ctrl->lock);
+ memcpy(&ctrl->chip, &ath79_gpio_chip, sizeof(ctrl->chip));
+ ctrl->chip.dev = &pdev->dev;
+ ctrl->chip.ngpio = ath79_gpio_count;
+ if (oe_inverted) {
+ ctrl->chip.direction_input = ar934x_gpio_direction_input;
+ ctrl->chip.direction_output = ar934x_gpio_direction_output;
+ }
+
+ err = gpiochip_add(&ctrl->chip);
+ if (err) {
+ dev_err(&pdev->dev,
+ "cannot add AR71xx GPIO chip, error=%d", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static struct platform_driver ath79_gpio_driver = {
+ .driver = {
+ .name = "ath79-gpio",
+ .of_match_table = ath79_gpio_of_match,
+ },
+ .probe = ath79_gpio_probe,
+};
+
+module_platform_driver(ath79_gpio_driver);
diff --git a/kernel/drivers/gpio/gpio-bcm-kona.c b/kernel/drivers/gpio/gpio-bcm-kona.c
index b164ce837..33a1f9779 100644
--- a/kernel/drivers/gpio/gpio-bcm-kona.c
+++ b/kernel/drivers/gpio/gpio-bcm-kona.c
@@ -122,6 +122,16 @@ static void bcm_kona_gpio_unlock_gpio(struct bcm_kona_gpio *kona_gpio,
spin_unlock_irqrestore(&kona_gpio->lock, flags);
}
+static int bcm_kona_gpio_get_dir(struct gpio_chip *chip, unsigned gpio)
+{
+ struct bcm_kona_gpio *kona_gpio = to_kona_gpio(chip);
+ void __iomem *reg_base = kona_gpio->reg_base;
+ u32 val;
+
+ val = readl(reg_base + GPIO_CONTROL(gpio)) & GPIO_GPCTR0_IOTR_MASK;
+ return val ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
+}
+
static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
{
struct bcm_kona_gpio *kona_gpio;
@@ -135,12 +145,8 @@ static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
reg_base = kona_gpio->reg_base;
spin_lock_irqsave(&kona_gpio->lock, flags);
- /* determine the GPIO pin direction */
- val = readl(reg_base + GPIO_CONTROL(gpio));
- val &= GPIO_GPCTR0_IOTR_MASK;
-
/* this function only applies to output pin */
- if (GPIO_GPCTR0_IOTR_CMD_INPUT == val)
+ if (bcm_kona_gpio_get_dir(chip, gpio) == GPIOF_DIR_IN)
goto out;
reg_offset = value ? GPIO_OUT_SET(bank_id) : GPIO_OUT_CLEAR(bank_id);
@@ -166,13 +172,12 @@ static int bcm_kona_gpio_get(struct gpio_chip *chip, unsigned gpio)
reg_base = kona_gpio->reg_base;
spin_lock_irqsave(&kona_gpio->lock, flags);
- /* determine the GPIO pin direction */
- val = readl(reg_base + GPIO_CONTROL(gpio));
- val &= GPIO_GPCTR0_IOTR_MASK;
+ if (bcm_kona_gpio_get_dir(chip, gpio) == GPIOF_DIR_IN)
+ reg_offset = GPIO_IN_STATUS(bank_id);
+ else
+ reg_offset = GPIO_OUT_STATUS(bank_id);
/* read the GPIO bank status */
- reg_offset = (GPIO_GPCTR0_IOTR_CMD_INPUT == val) ?
- GPIO_IN_STATUS(bank_id) : GPIO_OUT_STATUS(bank_id);
val = readl(reg_base + reg_offset);
spin_unlock_irqrestore(&kona_gpio->lock, flags);
@@ -310,6 +315,7 @@ static struct gpio_chip template_chip = {
.owner = THIS_MODULE,
.request = bcm_kona_gpio_request,
.free = bcm_kona_gpio_free,
+ .get_direction = bcm_kona_gpio_get_dir,
.direction_input = bcm_kona_gpio_direction_input,
.get = bcm_kona_gpio_get,
.direction_output = bcm_kona_gpio_direction_output,
@@ -427,12 +433,12 @@ static int bcm_kona_gpio_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
-static void bcm_kona_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void bcm_kona_gpio_irq_handler(struct irq_desc *desc)
{
void __iomem *reg_base;
int bit, bank_id;
unsigned long sta;
- struct bcm_kona_gpio_bank *bank = irq_get_handler_data(irq);
+ struct bcm_kona_gpio_bank *bank = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
chained_irq_enter(chip, desc);
@@ -519,11 +525,7 @@ static int bcm_kona_gpio_irq_map(struct irq_domain *d, unsigned int irq,
return ret;
irq_set_lockdep_class(irq, &gpio_lock_class);
irq_set_chip_and_handler(irq, &bcm_gpio_irq_chip, handle_simple_irq);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
irq_set_noprobe(irq);
-#endif
return 0;
}
@@ -534,7 +536,7 @@ static void bcm_kona_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
irq_set_chip_data(irq, NULL);
}
-static struct irq_domain_ops bcm_kona_irq_ops = {
+static const struct irq_domain_ops bcm_kona_irq_ops = {
.map = bcm_kona_gpio_irq_map,
.unmap = bcm_kona_gpio_irq_unmap,
.xlate = irq_domain_xlate_twocell,
@@ -638,21 +640,11 @@ static int bcm_kona_gpio_probe(struct platform_device *pdev)
dev_err(dev, "Couldn't add GPIO chip -- %d\n", ret);
goto err_irq_domain;
}
- for (i = 0; i < chip->ngpio; i++) {
- int irq = bcm_kona_gpio_to_irq(chip, i);
- irq_set_lockdep_class(irq, &gpio_lock_class);
- irq_set_chip_and_handler(irq, &bcm_gpio_irq_chip,
- handle_simple_irq);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
- }
for (i = 0; i < kona_gpio->num_bank; i++) {
bank = &kona_gpio->banks[i];
- irq_set_chained_handler(bank->irq, bcm_kona_gpio_irq_handler);
- irq_set_handler_data(bank->irq, bank);
+ irq_set_chained_handler_and_data(bank->irq,
+ bcm_kona_gpio_irq_handler,
+ bank);
}
spin_lock_init(&kona_gpio->lock);
diff --git a/kernel/drivers/gpio/gpio-brcmstb.c b/kernel/drivers/gpio/gpio-brcmstb.c
new file mode 100644
index 000000000..4c64627c6
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-brcmstb.c
@@ -0,0 +1,554 @@
+/*
+ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bitops.h>
+#include <linux/gpio/driver.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/module.h>
+#include <linux/basic_mmio_gpio.h>
+#include <linux/irqdomain.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+
+#define GIO_BANK_SIZE 0x20
+#define GIO_ODEN(bank) (((bank) * GIO_BANK_SIZE) + 0x00)
+#define GIO_DATA(bank) (((bank) * GIO_BANK_SIZE) + 0x04)
+#define GIO_IODIR(bank) (((bank) * GIO_BANK_SIZE) + 0x08)
+#define GIO_EC(bank) (((bank) * GIO_BANK_SIZE) + 0x0c)
+#define GIO_EI(bank) (((bank) * GIO_BANK_SIZE) + 0x10)
+#define GIO_MASK(bank) (((bank) * GIO_BANK_SIZE) + 0x14)
+#define GIO_LEVEL(bank) (((bank) * GIO_BANK_SIZE) + 0x18)
+#define GIO_STAT(bank) (((bank) * GIO_BANK_SIZE) + 0x1c)
+
+struct brcmstb_gpio_bank {
+ struct list_head node;
+ int id;
+ struct bgpio_chip bgc;
+ struct brcmstb_gpio_priv *parent_priv;
+ u32 width;
+ struct irq_chip irq_chip;
+};
+
+struct brcmstb_gpio_priv {
+ struct list_head bank_list;
+ void __iomem *reg_base;
+ struct platform_device *pdev;
+ int parent_irq;
+ int gpio_base;
+ bool can_wake;
+ int parent_wake_irq;
+ struct notifier_block reboot_notifier;
+};
+
+#define MAX_GPIO_PER_BANK 32
+#define GPIO_BANK(gpio) ((gpio) >> 5)
+/* assumes MAX_GPIO_PER_BANK is a multiple of 2 */
+#define GPIO_BIT(gpio) ((gpio) & (MAX_GPIO_PER_BANK - 1))
+
+static inline struct brcmstb_gpio_bank *
+brcmstb_gpio_gc_to_bank(struct gpio_chip *gc)
+{
+ struct bgpio_chip *bgc = to_bgpio_chip(gc);
+ return container_of(bgc, struct brcmstb_gpio_bank, bgc);
+}
+
+static inline struct brcmstb_gpio_priv *
+brcmstb_gpio_gc_to_priv(struct gpio_chip *gc)
+{
+ struct brcmstb_gpio_bank *bank = brcmstb_gpio_gc_to_bank(gc);
+ return bank->parent_priv;
+}
+
+static void brcmstb_gpio_set_imask(struct brcmstb_gpio_bank *bank,
+ unsigned int offset, bool enable)
+{
+ struct bgpio_chip *bgc = &bank->bgc;
+ struct brcmstb_gpio_priv *priv = bank->parent_priv;
+ u32 mask = bgc->pin2mask(bgc, offset);
+ u32 imask;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bgc->lock, flags);
+ imask = bgc->read_reg(priv->reg_base + GIO_MASK(bank->id));
+ if (enable)
+ imask |= mask;
+ else
+ imask &= ~mask;
+ bgc->write_reg(priv->reg_base + GIO_MASK(bank->id), imask);
+ spin_unlock_irqrestore(&bgc->lock, flags);
+}
+
+/* -------------------- IRQ chip functions -------------------- */
+
+static void brcmstb_gpio_irq_mask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct brcmstb_gpio_bank *bank = brcmstb_gpio_gc_to_bank(gc);
+
+ brcmstb_gpio_set_imask(bank, d->hwirq, false);
+}
+
+static void brcmstb_gpio_irq_unmask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct brcmstb_gpio_bank *bank = brcmstb_gpio_gc_to_bank(gc);
+
+ brcmstb_gpio_set_imask(bank, d->hwirq, true);
+}
+
+static int brcmstb_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct brcmstb_gpio_bank *bank = brcmstb_gpio_gc_to_bank(gc);
+ struct brcmstb_gpio_priv *priv = bank->parent_priv;
+ u32 mask = BIT(d->hwirq);
+ u32 edge_insensitive, iedge_insensitive;
+ u32 edge_config, iedge_config;
+ u32 level, ilevel;
+ unsigned long flags;
+
+ switch (type) {
+ case IRQ_TYPE_LEVEL_LOW:
+ level = 0;
+ edge_config = 0;
+ edge_insensitive = 0;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ level = mask;
+ edge_config = 0;
+ edge_insensitive = 0;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ level = 0;
+ edge_config = 0;
+ edge_insensitive = 0;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ level = 0;
+ edge_config = mask;
+ edge_insensitive = 0;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ level = 0;
+ edge_config = 0; /* don't care, but want known value */
+ edge_insensitive = mask;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&bank->bgc.lock, flags);
+
+ iedge_config = bank->bgc.read_reg(priv->reg_base +
+ GIO_EC(bank->id)) & ~mask;
+ iedge_insensitive = bank->bgc.read_reg(priv->reg_base +
+ GIO_EI(bank->id)) & ~mask;
+ ilevel = bank->bgc.read_reg(priv->reg_base +
+ GIO_LEVEL(bank->id)) & ~mask;
+
+ bank->bgc.write_reg(priv->reg_base + GIO_EC(bank->id),
+ iedge_config | edge_config);
+ bank->bgc.write_reg(priv->reg_base + GIO_EI(bank->id),
+ iedge_insensitive | edge_insensitive);
+ bank->bgc.write_reg(priv->reg_base + GIO_LEVEL(bank->id),
+ ilevel | level);
+
+ spin_unlock_irqrestore(&bank->bgc.lock, flags);
+ return 0;
+}
+
+static int brcmstb_gpio_priv_set_wake(struct brcmstb_gpio_priv *priv,
+ unsigned int enable)
+{
+ int ret = 0;
+
+ /*
+ * Only enable wake IRQ once for however many hwirqs can wake
+ * since they all use the same wake IRQ. Mask will be set
+ * up appropriately thanks to IRQCHIP_MASK_ON_SUSPEND flag.
+ */
+ if (enable)
+ ret = enable_irq_wake(priv->parent_wake_irq);
+ else
+ ret = disable_irq_wake(priv->parent_wake_irq);
+ if (ret)
+ dev_err(&priv->pdev->dev, "failed to %s wake-up interrupt\n",
+ enable ? "enable" : "disable");
+ return ret;
+}
+
+static int brcmstb_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct brcmstb_gpio_priv *priv = brcmstb_gpio_gc_to_priv(gc);
+
+ return brcmstb_gpio_priv_set_wake(priv, enable);
+}
+
+static irqreturn_t brcmstb_gpio_wake_irq_handler(int irq, void *data)
+{
+ struct brcmstb_gpio_priv *priv = data;
+
+ if (!priv || irq != priv->parent_wake_irq)
+ return IRQ_NONE;
+ pm_wakeup_event(&priv->pdev->dev, 0);
+ return IRQ_HANDLED;
+}
+
+static void brcmstb_gpio_irq_bank_handler(struct brcmstb_gpio_bank *bank)
+{
+ struct brcmstb_gpio_priv *priv = bank->parent_priv;
+ struct irq_domain *irq_domain = bank->bgc.gc.irqdomain;
+ void __iomem *reg_base = priv->reg_base;
+ unsigned long status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->bgc.lock, flags);
+ while ((status = bank->bgc.read_reg(reg_base + GIO_STAT(bank->id)) &
+ bank->bgc.read_reg(reg_base + GIO_MASK(bank->id)))) {
+ int bit;
+
+ for_each_set_bit(bit, &status, 32) {
+ u32 stat = bank->bgc.read_reg(reg_base +
+ GIO_STAT(bank->id));
+ if (bit >= bank->width)
+ dev_warn(&priv->pdev->dev,
+ "IRQ for invalid GPIO (bank=%d, offset=%d)\n",
+ bank->id, bit);
+ bank->bgc.write_reg(reg_base + GIO_STAT(bank->id),
+ stat | BIT(bit));
+ generic_handle_irq(irq_find_mapping(irq_domain, bit));
+ }
+ }
+ spin_unlock_irqrestore(&bank->bgc.lock, flags);
+}
+
+/* Each UPG GIO block has one IRQ for all banks */
+static void brcmstb_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct brcmstb_gpio_priv *priv = brcmstb_gpio_gc_to_priv(gc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct list_head *pos;
+
+ /* Interrupts weren't properly cleared during probe */
+ BUG_ON(!priv || !chip);
+
+ chained_irq_enter(chip, desc);
+ list_for_each(pos, &priv->bank_list) {
+ struct brcmstb_gpio_bank *bank =
+ list_entry(pos, struct brcmstb_gpio_bank, node);
+ brcmstb_gpio_irq_bank_handler(bank);
+ }
+ chained_irq_exit(chip, desc);
+}
+
+static int brcmstb_gpio_reboot(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct brcmstb_gpio_priv *priv =
+ container_of(nb, struct brcmstb_gpio_priv, reboot_notifier);
+
+ /* Enable GPIO for S5 cold boot */
+ if (action == SYS_POWER_OFF)
+ brcmstb_gpio_priv_set_wake(priv, 1);
+
+ return NOTIFY_DONE;
+}
+
+/* Make sure that the number of banks matches up between properties */
+static int brcmstb_gpio_sanity_check_banks(struct device *dev,
+ struct device_node *np, struct resource *res)
+{
+ int res_num_banks = resource_size(res) / GIO_BANK_SIZE;
+ int num_banks =
+ of_property_count_u32_elems(np, "brcm,gpio-bank-widths");
+
+ if (res_num_banks != num_banks) {
+ dev_err(dev, "Mismatch in banks: res had %d, bank-widths had %d\n",
+ res_num_banks, num_banks);
+ return -EINVAL;
+ } else {
+ return 0;
+ }
+}
+
+static int brcmstb_gpio_remove(struct platform_device *pdev)
+{
+ struct brcmstb_gpio_priv *priv = platform_get_drvdata(pdev);
+ struct list_head *pos;
+ struct brcmstb_gpio_bank *bank;
+ int ret = 0;
+
+ if (!priv) {
+ dev_err(&pdev->dev, "called %s without drvdata!\n", __func__);
+ return -EFAULT;
+ }
+
+ /*
+ * You can lose return values below, but we report all errors, and it's
+ * more important to actually perform all of the steps.
+ */
+ list_for_each(pos, &priv->bank_list) {
+ bank = list_entry(pos, struct brcmstb_gpio_bank, node);
+ ret = bgpio_remove(&bank->bgc);
+ if (ret)
+ dev_err(&pdev->dev, "gpiochip_remove fail in cleanup\n");
+ }
+ if (priv->reboot_notifier.notifier_call) {
+ ret = unregister_reboot_notifier(&priv->reboot_notifier);
+ if (ret)
+ dev_err(&pdev->dev,
+ "failed to unregister reboot notifier\n");
+ }
+ return ret;
+}
+
+static int brcmstb_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec, u32 *flags)
+{
+ struct brcmstb_gpio_priv *priv = brcmstb_gpio_gc_to_priv(gc);
+ struct brcmstb_gpio_bank *bank = brcmstb_gpio_gc_to_bank(gc);
+ int offset;
+
+ if (gc->of_gpio_n_cells != 2) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+ return -EINVAL;
+
+ offset = gpiospec->args[0] - (gc->base - priv->gpio_base);
+ if (offset >= gc->ngpio || offset < 0)
+ return -EINVAL;
+
+ if (unlikely(offset >= bank->width)) {
+ dev_warn_ratelimited(&priv->pdev->dev,
+ "Received request for invalid GPIO offset %d\n",
+ gpiospec->args[0]);
+ }
+
+ if (flags)
+ *flags = gpiospec->args[1];
+
+ return offset;
+}
+
+/* Before calling, must have bank->parent_irq set and gpiochip registered */
+static int brcmstb_gpio_irq_setup(struct platform_device *pdev,
+ struct brcmstb_gpio_bank *bank)
+{
+ struct brcmstb_gpio_priv *priv = bank->parent_priv;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+
+ bank->irq_chip.name = dev_name(dev);
+ bank->irq_chip.irq_mask = brcmstb_gpio_irq_mask;
+ bank->irq_chip.irq_unmask = brcmstb_gpio_irq_unmask;
+ bank->irq_chip.irq_set_type = brcmstb_gpio_irq_set_type;
+
+ /* Ensures that all non-wakeup IRQs are disabled at suspend */
+ bank->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND;
+
+ if (IS_ENABLED(CONFIG_PM_SLEEP) && !priv->can_wake &&
+ of_property_read_bool(np, "wakeup-source")) {
+ priv->parent_wake_irq = platform_get_irq(pdev, 1);
+ if (priv->parent_wake_irq < 0) {
+ dev_warn(dev,
+ "Couldn't get wake IRQ - GPIOs will not be able to wake from sleep");
+ } else {
+ int err;
+
+ /*
+ * Set wakeup capability before requesting wakeup
+ * interrupt, so we can process boot-time "wakeups"
+ * (e.g., from S5 cold boot)
+ */
+ device_set_wakeup_capable(dev, true);
+ device_wakeup_enable(dev);
+ err = devm_request_irq(dev, priv->parent_wake_irq,
+ brcmstb_gpio_wake_irq_handler, 0,
+ "brcmstb-gpio-wake", priv);
+
+ if (err < 0) {
+ dev_err(dev, "Couldn't request wake IRQ");
+ return err;
+ }
+
+ priv->reboot_notifier.notifier_call =
+ brcmstb_gpio_reboot;
+ register_reboot_notifier(&priv->reboot_notifier);
+ priv->can_wake = true;
+ }
+ }
+
+ if (priv->can_wake)
+ bank->irq_chip.irq_set_wake = brcmstb_gpio_irq_set_wake;
+
+ gpiochip_irqchip_add(&bank->bgc.gc, &bank->irq_chip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
+ gpiochip_set_chained_irqchip(&bank->bgc.gc, &bank->irq_chip,
+ priv->parent_irq, brcmstb_gpio_irq_handler);
+
+ return 0;
+}
+
+static int brcmstb_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ void __iomem *reg_base;
+ struct brcmstb_gpio_priv *priv;
+ struct resource *res;
+ struct property *prop;
+ const __be32 *p;
+ u32 bank_width;
+ int num_banks = 0;
+ int err;
+ static int gpio_base;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, priv);
+ INIT_LIST_HEAD(&priv->bank_list);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ reg_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(reg_base))
+ return PTR_ERR(reg_base);
+
+ priv->gpio_base = gpio_base;
+ priv->reg_base = reg_base;
+ priv->pdev = pdev;
+
+ if (of_property_read_bool(np, "interrupt-controller")) {
+ priv->parent_irq = platform_get_irq(pdev, 0);
+ if (priv->parent_irq <= 0) {
+ dev_err(dev, "Couldn't get IRQ");
+ return -ENOENT;
+ }
+ } else {
+ priv->parent_irq = -ENOENT;
+ }
+
+ if (brcmstb_gpio_sanity_check_banks(dev, np, res))
+ return -EINVAL;
+
+ of_property_for_each_u32(np, "brcm,gpio-bank-widths", prop, p,
+ bank_width) {
+ struct brcmstb_gpio_bank *bank;
+ struct bgpio_chip *bgc;
+ struct gpio_chip *gc;
+
+ bank = devm_kzalloc(dev, sizeof(*bank), GFP_KERNEL);
+ if (!bank) {
+ err = -ENOMEM;
+ goto fail;
+ }
+
+ bank->parent_priv = priv;
+ bank->id = num_banks;
+ if (bank_width <= 0 || bank_width > MAX_GPIO_PER_BANK) {
+ dev_err(dev, "Invalid bank width %d\n", bank_width);
+ goto fail;
+ } else {
+ bank->width = bank_width;
+ }
+
+ /*
+ * Regs are 4 bytes wide, have data reg, no set/clear regs,
+ * and direction bits have 0 = output and 1 = input
+ */
+ bgc = &bank->bgc;
+ err = bgpio_init(bgc, dev, 4,
+ reg_base + GIO_DATA(bank->id),
+ NULL, NULL, NULL,
+ reg_base + GIO_IODIR(bank->id), 0);
+ if (err) {
+ dev_err(dev, "bgpio_init() failed\n");
+ goto fail;
+ }
+
+ gc = &bgc->gc;
+ gc->of_node = np;
+ gc->owner = THIS_MODULE;
+ gc->label = np->full_name;
+ gc->base = gpio_base;
+ gc->of_gpio_n_cells = 2;
+ gc->of_xlate = brcmstb_gpio_of_xlate;
+ /* not all ngpio lines are valid, will use bank width later */
+ gc->ngpio = MAX_GPIO_PER_BANK;
+
+ /*
+ * Mask all interrupts by default, since wakeup interrupts may
+ * be retained from S5 cold boot
+ */
+ bank->bgc.write_reg(reg_base + GIO_MASK(bank->id), 0);
+
+ err = gpiochip_add(gc);
+ if (err) {
+ dev_err(dev, "Could not add gpiochip for bank %d\n",
+ bank->id);
+ goto fail;
+ }
+ gpio_base += gc->ngpio;
+
+ if (priv->parent_irq > 0) {
+ err = brcmstb_gpio_irq_setup(pdev, bank);
+ if (err)
+ goto fail;
+ }
+
+ dev_dbg(dev, "bank=%d, base=%d, ngpio=%d, width=%d\n", bank->id,
+ gc->base, gc->ngpio, bank->width);
+
+ /* Everything looks good, so add bank to list */
+ list_add(&bank->node, &priv->bank_list);
+
+ num_banks++;
+ }
+
+ dev_info(dev, "Registered %d banks (GPIO(s): %d-%d)\n",
+ num_banks, priv->gpio_base, gpio_base - 1);
+
+ return 0;
+
+fail:
+ (void) brcmstb_gpio_remove(pdev);
+ return err;
+}
+
+static const struct of_device_id brcmstb_gpio_of_match[] = {
+ { .compatible = "brcm,brcmstb-gpio" },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, brcmstb_gpio_of_match);
+
+static struct platform_driver brcmstb_gpio_driver = {
+ .driver = {
+ .name = "brcmstb-gpio",
+ .of_match_table = brcmstb_gpio_of_match,
+ },
+ .probe = brcmstb_gpio_probe,
+ .remove = brcmstb_gpio_remove,
+};
+module_platform_driver(brcmstb_gpio_driver);
+
+MODULE_AUTHOR("Gregory Fong");
+MODULE_DESCRIPTION("Driver for Broadcom BRCMSTB SoC UPG GPIO");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/gpio/gpio-crystalcove.c b/kernel/drivers/gpio/gpio-crystalcove.c
index ab457fc00..fddd204dc 100644
--- a/kernel/drivers/gpio/gpio-crystalcove.c
+++ b/kernel/drivers/gpio/gpio-crystalcove.c
@@ -16,6 +16,7 @@
*/
#include <linux/interrupt.h>
+#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/seq_file.h>
@@ -94,9 +95,8 @@ static inline int to_reg(int gpio, enum ctrl_register reg_type)
{
int reg;
- if (gpio == 94) {
+ if (gpio == 94)
return GPIOPANELCTL;
- }
if (reg_type == CTRL_IN) {
if (gpio < 8)
diff --git a/kernel/drivers/gpio/gpio-davinci.c b/kernel/drivers/gpio/gpio-davinci.c
index c5e05c82d..5e7153888 100644
--- a/kernel/drivers/gpio/gpio-davinci.c
+++ b/kernel/drivers/gpio/gpio-davinci.c
@@ -65,11 +65,11 @@ static struct davinci_gpio_regs __iomem *gpio2regs(unsigned gpio)
return ptr;
}
-static inline struct davinci_gpio_regs __iomem *irq2regs(int irq)
+static inline struct davinci_gpio_regs __iomem *irq2regs(struct irq_data *d)
{
struct davinci_gpio_regs __iomem *g;
- g = (__force struct davinci_gpio_regs __iomem *)irq_get_chip_data(irq);
+ g = (__force struct davinci_gpio_regs __iomem *)irq_data_get_irq_chip_data(d);
return g;
}
@@ -287,7 +287,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
static void gpio_irq_disable(struct irq_data *d)
{
- struct davinci_gpio_regs __iomem *g = irq2regs(d->irq);
+ struct davinci_gpio_regs __iomem *g = irq2regs(d);
u32 mask = (u32) irq_data_get_irq_handler_data(d);
writel_relaxed(mask, &g->clr_falling);
@@ -296,7 +296,7 @@ static void gpio_irq_disable(struct irq_data *d)
static void gpio_irq_enable(struct irq_data *d)
{
- struct davinci_gpio_regs __iomem *g = irq2regs(d->irq);
+ struct davinci_gpio_regs __iomem *g = irq2regs(d);
u32 mask = (u32) irq_data_get_irq_handler_data(d);
unsigned status = irqd_get_trigger_type(d);
@@ -326,9 +326,9 @@ static struct irq_chip gpio_irqchip = {
.flags = IRQCHIP_SET_TYPE_MASKED,
};
-static void
-gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+static void gpio_irq_handler(struct irq_desc *desc)
{
+ unsigned int irq = irq_desc_get_irq(desc);
struct davinci_gpio_regs __iomem *g;
u32 mask = 0xffff;
struct davinci_gpio_controller *d;
@@ -396,7 +396,7 @@ static int gpio_irq_type_unbanked(struct irq_data *data, unsigned trigger)
struct davinci_gpio_regs __iomem *g;
u32 mask;
- d = (struct davinci_gpio_controller *)data->handler_data;
+ d = (struct davinci_gpio_controller *)irq_data_get_irq_handler_data(data);
g = (struct davinci_gpio_regs __iomem *)d->regs;
mask = __gpio_mask(data->irq - d->gpio_irq);
@@ -422,7 +422,6 @@ davinci_gpio_irq_map(struct irq_domain *d, unsigned int irq,
irq_set_irq_type(irq, IRQ_TYPE_NONE);
irq_set_chip_data(irq, (__force void *)g);
irq_set_handler_data(irq, (void *)__gpio_mask(hw));
- set_irq_flags(irq, IRQF_VALID);
return 0;
}
@@ -545,7 +544,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
chips[0].chip.to_irq = gpio_to_irq_unbanked;
chips[0].gpio_irq = bank_irq;
chips[0].gpio_unbanked = pdata->gpio_unbanked;
- binten = BIT(0);
+ binten = GENMASK(pdata->gpio_unbanked / 16, 0);
/* AINTC handles mask/unmask; GPIO handles triggering */
irq = bank_irq;
@@ -578,15 +577,13 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
writel_relaxed(~0, &g->clr_falling);
writel_relaxed(~0, &g->clr_rising);
- /* set up all irqs in this bank */
- irq_set_chained_handler(bank_irq, gpio_irq_handler);
-
/*
* Each chip handles 32 gpios, and each irq bank consists of 16
* gpio irqs. Pass the irq bank's corresponding controller to
* the chained irq handler.
*/
- irq_set_handler_data(bank_irq, &chips[gpio / 32]);
+ irq_set_chained_handler_and_data(bank_irq, gpio_irq_handler,
+ &chips[gpio / 32]);
binten |= BIT(bank);
}
diff --git a/kernel/drivers/gpio/gpio-dln2.c b/kernel/drivers/gpio/gpio-dln2.c
index dbdb4de82..6685712c1 100644
--- a/kernel/drivers/gpio/gpio-dln2.c
+++ b/kernel/drivers/gpio/gpio-dln2.c
@@ -466,7 +466,6 @@ static int dln2_gpio_probe(struct platform_device *pdev)
dln2->gpio.owner = THIS_MODULE;
dln2->gpio.base = -1;
dln2->gpio.ngpio = pins;
- dln2->gpio.exported = true;
dln2->gpio.can_sleep = true;
dln2->gpio.irq_not_threaded = true;
dln2->gpio.set = dln2_gpio_set;
diff --git a/kernel/drivers/gpio/gpio-dwapb.c b/kernel/drivers/gpio/gpio-dwapb.c
index 58faf04fc..fcd5b0acf 100644
--- a/kernel/drivers/gpio/gpio-dwapb.c
+++ b/kernel/drivers/gpio/gpio-dwapb.c
@@ -147,9 +147,9 @@ static u32 dwapb_do_irq(struct dwapb_gpio *gpio)
return ret;
}
-static void dwapb_irq_handler(u32 irq, struct irq_desc *desc)
+static void dwapb_irq_handler(struct irq_desc *desc)
{
- struct dwapb_gpio *gpio = irq_get_handler_data(irq);
+ struct dwapb_gpio *gpio = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
dwapb_do_irq(gpio);
@@ -348,8 +348,8 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
irq_gc->chip_types[1].handler = handle_edge_irq;
if (!pp->irq_shared) {
- irq_set_chained_handler(pp->irq, dwapb_irq_handler);
- irq_set_handler_data(pp->irq, gpio);
+ irq_set_chained_handler_and_data(pp->irq, dwapb_irq_handler,
+ gpio);
} else {
/*
* Request a shared IRQ since where MFD would have devices
diff --git a/kernel/drivers/gpio/gpio-em.c b/kernel/drivers/gpio/gpio-em.c
index 3cfcfc620..6bca1e125 100644
--- a/kernel/drivers/gpio/gpio-em.c
+++ b/kernel/drivers/gpio/gpio-em.c
@@ -31,7 +31,6 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
-#include <linux/platform_data/gpio-em.h>
struct em_gio_priv {
void __iomem *base0;
@@ -262,24 +261,22 @@ static int em_gio_irq_domain_map(struct irq_domain *h, unsigned int irq,
irq_set_chip_data(irq, h->host_data);
irq_set_chip_and_handler(irq, &p->irq_chip, handle_level_irq);
- set_irq_flags(irq, IRQF_VALID); /* kill me now */
return 0;
}
-static struct irq_domain_ops em_gio_irq_domain_ops = {
+static const struct irq_domain_ops em_gio_irq_domain_ops = {
.map = em_gio_irq_domain_map,
.xlate = irq_domain_xlate_twocell,
};
static int em_gio_probe(struct platform_device *pdev)
{
- struct gpio_em_config pdata_dt;
- struct gpio_em_config *pdata = dev_get_platdata(&pdev->dev);
struct em_gio_priv *p;
struct resource *io[2], *irq[2];
struct gpio_chip *gpio_chip;
struct irq_chip *irq_chip;
const char *name = dev_name(&pdev->dev);
+ unsigned int ngpios;
int ret;
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
@@ -319,18 +316,10 @@ static int em_gio_probe(struct platform_device *pdev)
goto err0;
}
- if (!pdata) {
- memset(&pdata_dt, 0, sizeof(pdata_dt));
- pdata = &pdata_dt;
-
- if (of_property_read_u32(pdev->dev.of_node, "ngpios",
- &pdata->number_of_pins)) {
- dev_err(&pdev->dev, "Missing ngpios OF property\n");
- ret = -EINVAL;
- goto err0;
- }
-
- pdata->gpio_base = -1;
+ if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
+ dev_err(&pdev->dev, "Missing ngpios OF property\n");
+ ret = -EINVAL;
+ goto err0;
}
gpio_chip = &p->gpio_chip;
@@ -345,8 +334,8 @@ static int em_gio_probe(struct platform_device *pdev)
gpio_chip->label = name;
gpio_chip->dev = &pdev->dev;
gpio_chip->owner = THIS_MODULE;
- gpio_chip->base = pdata->gpio_base;
- gpio_chip->ngpio = pdata->number_of_pins;
+ gpio_chip->base = -1;
+ gpio_chip->ngpio = ngpios;
irq_chip = &p->irq_chip;
irq_chip->name = name;
@@ -357,9 +346,7 @@ static int em_gio_probe(struct platform_device *pdev)
irq_chip->irq_release_resources = em_gio_irq_relres;
irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
- p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,
- pdata->number_of_pins,
- pdata->irq_base,
+ p->irq_domain = irq_domain_add_simple(pdev->dev.of_node, ngpios, 0,
&em_gio_irq_domain_ops, p);
if (!p->irq_domain) {
ret = -ENXIO;
@@ -387,12 +374,6 @@ static int em_gio_probe(struct platform_device *pdev)
goto err1;
}
- if (pdata->pctl_name) {
- ret = gpiochip_add_pin_range(gpio_chip, pdata->pctl_name, 0,
- gpio_chip->base, gpio_chip->ngpio);
- if (ret < 0)
- dev_warn(&pdev->dev, "failed to add pin range\n");
- }
return 0;
err1:
diff --git a/kernel/drivers/gpio/gpio-ep93xx.c b/kernel/drivers/gpio/gpio-ep93xx.c
index 45684f36d..3e3947b35 100644
--- a/kernel/drivers/gpio/gpio-ep93xx.c
+++ b/kernel/drivers/gpio/gpio-ep93xx.c
@@ -78,7 +78,7 @@ static void ep93xx_gpio_int_debounce(unsigned int irq, bool enable)
EP93XX_GPIO_REG(int_debounce_register_offset[port]));
}
-static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc)
{
unsigned char status;
int i;
@@ -100,13 +100,14 @@ static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc)
}
}
-static void ep93xx_gpio_f_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc)
{
/*
* map discontiguous hw irq range to continuous sw irq range:
*
* IRQ_EP93XX_GPIO{0..7}MUX -> gpio_to_irq(EP93XX_GPIO_LINE_F({0..7})
*/
+ unsigned int irq = irq_desc_get_irq(desc);
int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */
int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_F(0)) + port_f_idx;
@@ -208,7 +209,7 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}
- __irq_set_handler_locked(d->irq, handler);
+ irq_set_handler_locked(d, handler);
gpio_int_enabled[port] |= port_mask;
@@ -234,7 +235,7 @@ static void ep93xx_gpio_init_irq(void)
gpio_irq <= gpio_to_irq(EP93XX_GPIO_LINE_MAX_IRQ); ++gpio_irq) {
irq_set_chip_and_handler(gpio_irq, &ep93xx_gpio_irq_chip,
handle_level_irq);
- set_irq_flags(gpio_irq, IRQF_VALID);
+ irq_clear_status_flags(gpio_irq, IRQ_NOREQUEST);
}
irq_set_chained_handler(IRQ_EP93XX_GPIO_AB,
diff --git a/kernel/drivers/gpio/gpio-etraxfs.c b/kernel/drivers/gpio/gpio-etraxfs.c
new file mode 100644
index 000000000..5c15dd121
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-etraxfs.c
@@ -0,0 +1,486 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
+#include <linux/of_gpio.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/basic_mmio_gpio.h>
+
+#define ETRAX_FS_rw_pa_dout 0
+#define ETRAX_FS_r_pa_din 4
+#define ETRAX_FS_rw_pa_oe 8
+#define ETRAX_FS_rw_intr_cfg 12
+#define ETRAX_FS_rw_intr_mask 16
+#define ETRAX_FS_rw_ack_intr 20
+#define ETRAX_FS_r_intr 24
+#define ETRAX_FS_r_masked_intr 28
+#define ETRAX_FS_rw_pb_dout 32
+#define ETRAX_FS_r_pb_din 36
+#define ETRAX_FS_rw_pb_oe 40
+#define ETRAX_FS_rw_pc_dout 48
+#define ETRAX_FS_r_pc_din 52
+#define ETRAX_FS_rw_pc_oe 56
+#define ETRAX_FS_rw_pd_dout 64
+#define ETRAX_FS_r_pd_din 68
+#define ETRAX_FS_rw_pd_oe 72
+#define ETRAX_FS_rw_pe_dout 80
+#define ETRAX_FS_r_pe_din 84
+#define ETRAX_FS_rw_pe_oe 88
+
+#define ARTPEC3_r_pa_din 0
+#define ARTPEC3_rw_pa_dout 4
+#define ARTPEC3_rw_pa_oe 8
+#define ARTPEC3_r_pb_din 44
+#define ARTPEC3_rw_pb_dout 48
+#define ARTPEC3_rw_pb_oe 52
+#define ARTPEC3_r_pc_din 88
+#define ARTPEC3_rw_pc_dout 92
+#define ARTPEC3_rw_pc_oe 96
+#define ARTPEC3_r_pd_din 116
+#define ARTPEC3_rw_intr_cfg 120
+#define ARTPEC3_rw_intr_pins 124
+#define ARTPEC3_rw_intr_mask 128
+#define ARTPEC3_rw_ack_intr 132
+#define ARTPEC3_r_masked_intr 140
+
+#define GIO_CFG_OFF 0
+#define GIO_CFG_HI 1
+#define GIO_CFG_LO 2
+#define GIO_CFG_SET 3
+#define GIO_CFG_POSEDGE 5
+#define GIO_CFG_NEGEDGE 6
+#define GIO_CFG_ANYEDGE 7
+
+struct etraxfs_gpio_info;
+
+struct etraxfs_gpio_block {
+ spinlock_t lock;
+ u32 mask;
+ u32 cfg;
+ u32 pins;
+ unsigned int group[8];
+
+ void __iomem *regs;
+ const struct etraxfs_gpio_info *info;
+};
+
+struct etraxfs_gpio_chip {
+ struct bgpio_chip bgc;
+ struct etraxfs_gpio_block *block;
+};
+
+struct etraxfs_gpio_port {
+ const char *label;
+ unsigned int oe;
+ unsigned int dout;
+ unsigned int din;
+ unsigned int ngpio;
+};
+
+struct etraxfs_gpio_info {
+ unsigned int num_ports;
+ const struct etraxfs_gpio_port *ports;
+
+ unsigned int rw_ack_intr;
+ unsigned int rw_intr_mask;
+ unsigned int rw_intr_cfg;
+ unsigned int rw_intr_pins;
+ unsigned int r_masked_intr;
+};
+
+static const struct etraxfs_gpio_port etraxfs_gpio_etraxfs_ports[] = {
+ {
+ .label = "A",
+ .ngpio = 8,
+ .oe = ETRAX_FS_rw_pa_oe,
+ .dout = ETRAX_FS_rw_pa_dout,
+ .din = ETRAX_FS_r_pa_din,
+ },
+ {
+ .label = "B",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pb_oe,
+ .dout = ETRAX_FS_rw_pb_dout,
+ .din = ETRAX_FS_r_pb_din,
+ },
+ {
+ .label = "C",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pc_oe,
+ .dout = ETRAX_FS_rw_pc_dout,
+ .din = ETRAX_FS_r_pc_din,
+ },
+ {
+ .label = "D",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pd_oe,
+ .dout = ETRAX_FS_rw_pd_dout,
+ .din = ETRAX_FS_r_pd_din,
+ },
+ {
+ .label = "E",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pe_oe,
+ .dout = ETRAX_FS_rw_pe_dout,
+ .din = ETRAX_FS_r_pe_din,
+ },
+};
+
+static const struct etraxfs_gpio_info etraxfs_gpio_etraxfs = {
+ .num_ports = ARRAY_SIZE(etraxfs_gpio_etraxfs_ports),
+ .ports = etraxfs_gpio_etraxfs_ports,
+ .rw_ack_intr = ETRAX_FS_rw_ack_intr,
+ .rw_intr_mask = ETRAX_FS_rw_intr_mask,
+ .rw_intr_cfg = ETRAX_FS_rw_intr_cfg,
+ .r_masked_intr = ETRAX_FS_r_masked_intr,
+};
+
+static const struct etraxfs_gpio_port etraxfs_gpio_artpec3_ports[] = {
+ {
+ .label = "A",
+ .ngpio = 32,
+ .oe = ARTPEC3_rw_pa_oe,
+ .dout = ARTPEC3_rw_pa_dout,
+ .din = ARTPEC3_r_pa_din,
+ },
+ {
+ .label = "B",
+ .ngpio = 32,
+ .oe = ARTPEC3_rw_pb_oe,
+ .dout = ARTPEC3_rw_pb_dout,
+ .din = ARTPEC3_r_pb_din,
+ },
+ {
+ .label = "C",
+ .ngpio = 16,
+ .oe = ARTPEC3_rw_pc_oe,
+ .dout = ARTPEC3_rw_pc_dout,
+ .din = ARTPEC3_r_pc_din,
+ },
+ {
+ .label = "D",
+ .ngpio = 32,
+ .din = ARTPEC3_r_pd_din,
+ },
+};
+
+static const struct etraxfs_gpio_info etraxfs_gpio_artpec3 = {
+ .num_ports = ARRAY_SIZE(etraxfs_gpio_artpec3_ports),
+ .ports = etraxfs_gpio_artpec3_ports,
+ .rw_ack_intr = ARTPEC3_rw_ack_intr,
+ .rw_intr_mask = ARTPEC3_rw_intr_mask,
+ .rw_intr_cfg = ARTPEC3_rw_intr_cfg,
+ .r_masked_intr = ARTPEC3_r_masked_intr,
+ .rw_intr_pins = ARTPEC3_rw_intr_pins,
+};
+
+static struct etraxfs_gpio_chip *to_etraxfs(struct gpio_chip *gc)
+{
+ return container_of(gc, struct etraxfs_gpio_chip, bgc.gc);
+}
+
+static unsigned int etraxfs_gpio_chip_to_port(struct gpio_chip *gc)
+{
+ return gc->label[0] - 'A';
+}
+
+static int etraxfs_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ /*
+ * Port numbers are A to E, and the properties are integers, so we
+ * specify them as 0xA - 0xE.
+ */
+ if (etraxfs_gpio_chip_to_port(gc) + 0xA != gpiospec->args[2])
+ return -EINVAL;
+
+ return of_gpio_simple_xlate(gc, gpiospec, flags);
+}
+
+static const struct of_device_id etraxfs_gpio_of_table[] = {
+ {
+ .compatible = "axis,etraxfs-gio",
+ .data = &etraxfs_gpio_etraxfs,
+ },
+ {
+ .compatible = "axis,artpec3-gio",
+ .data = &etraxfs_gpio_artpec3,
+ },
+ {},
+};
+
+static unsigned int etraxfs_gpio_to_group_irq(unsigned int gpio)
+{
+ return gpio % 8;
+}
+
+static unsigned int etraxfs_gpio_to_group_pin(struct etraxfs_gpio_chip *chip,
+ unsigned int gpio)
+{
+ return 4 * etraxfs_gpio_chip_to_port(&chip->bgc.gc) + gpio / 8;
+}
+
+static void etraxfs_gpio_irq_ack(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ to_etraxfs(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ writel(BIT(grpirq), block->regs + block->info->rw_ack_intr);
+}
+
+static void etraxfs_gpio_irq_mask(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ to_etraxfs(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ spin_lock(&block->lock);
+ block->mask &= ~BIT(grpirq);
+ writel(block->mask, block->regs + block->info->rw_intr_mask);
+ spin_unlock(&block->lock);
+}
+
+static void etraxfs_gpio_irq_unmask(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ to_etraxfs(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ spin_lock(&block->lock);
+ block->mask |= BIT(grpirq);
+ writel(block->mask, block->regs + block->info->rw_intr_mask);
+ spin_unlock(&block->lock);
+}
+
+static int etraxfs_gpio_irq_set_type(struct irq_data *d, u32 type)
+{
+ struct etraxfs_gpio_chip *chip =
+ to_etraxfs(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+ u32 cfg;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ cfg = GIO_CFG_POSEDGE;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ cfg = GIO_CFG_NEGEDGE;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ cfg = GIO_CFG_ANYEDGE;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ cfg = GIO_CFG_LO;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ cfg = GIO_CFG_HI;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ spin_lock(&block->lock);
+ block->cfg &= ~(0x7 << (grpirq * 3));
+ block->cfg |= (cfg << (grpirq * 3));
+ writel(block->cfg, block->regs + block->info->rw_intr_cfg);
+ spin_unlock(&block->lock);
+
+ return 0;
+}
+
+static int etraxfs_gpio_irq_request_resources(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ to_etraxfs(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+ int ret = -EBUSY;
+
+ spin_lock(&block->lock);
+ if (block->group[grpirq])
+ goto out;
+
+ ret = gpiochip_lock_as_irq(&chip->bgc.gc, d->hwirq);
+ if (ret)
+ goto out;
+
+ block->group[grpirq] = d->irq;
+ if (block->info->rw_intr_pins) {
+ unsigned int pin = etraxfs_gpio_to_group_pin(chip, d->hwirq);
+
+ block->pins &= ~(0xf << (grpirq * 4));
+ block->pins |= (pin << (grpirq * 4));
+
+ writel(block->pins, block->regs + block->info->rw_intr_pins);
+ }
+
+out:
+ spin_unlock(&block->lock);
+ return ret;
+}
+
+static void etraxfs_gpio_irq_release_resources(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ to_etraxfs(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ spin_lock(&block->lock);
+ block->group[grpirq] = 0;
+ gpiochip_unlock_as_irq(&chip->bgc.gc, d->hwirq);
+ spin_unlock(&block->lock);
+}
+
+static struct irq_chip etraxfs_gpio_irq_chip = {
+ .name = "gpio-etraxfs",
+ .irq_ack = etraxfs_gpio_irq_ack,
+ .irq_mask = etraxfs_gpio_irq_mask,
+ .irq_unmask = etraxfs_gpio_irq_unmask,
+ .irq_set_type = etraxfs_gpio_irq_set_type,
+ .irq_request_resources = etraxfs_gpio_irq_request_resources,
+ .irq_release_resources = etraxfs_gpio_irq_release_resources,
+};
+
+static irqreturn_t etraxfs_gpio_interrupt(int irq, void *dev_id)
+{
+ struct etraxfs_gpio_block *block = dev_id;
+ unsigned long intr = readl(block->regs + block->info->r_masked_intr);
+ int bit;
+
+ for_each_set_bit(bit, &intr, 8)
+ generic_handle_irq(block->group[bit]);
+
+ return IRQ_RETVAL(intr & 0xff);
+}
+
+static int etraxfs_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct etraxfs_gpio_info *info;
+ const struct of_device_id *match;
+ struct etraxfs_gpio_block *block;
+ struct etraxfs_gpio_chip *chips;
+ struct resource *res, *irq;
+ bool allportsirq = false;
+ void __iomem *regs;
+ int ret;
+ int i;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ match = of_match_node(etraxfs_gpio_of_table, dev->of_node);
+ if (!match)
+ return -EINVAL;
+
+ info = match->data;
+
+ chips = devm_kzalloc(dev, sizeof(*chips) * info->num_ports, GFP_KERNEL);
+ if (!chips)
+ return -ENOMEM;
+
+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!irq)
+ return -EINVAL;
+
+ block = devm_kzalloc(dev, sizeof(*block), GFP_KERNEL);
+ if (!block)
+ return -ENOMEM;
+
+ spin_lock_init(&block->lock);
+
+ block->regs = regs;
+ block->info = info;
+
+ writel(0, block->regs + info->rw_intr_mask);
+ writel(0, block->regs + info->rw_intr_cfg);
+ if (info->rw_intr_pins) {
+ allportsirq = true;
+ writel(0, block->regs + info->rw_intr_pins);
+ }
+
+ ret = devm_request_irq(dev, irq->start, etraxfs_gpio_interrupt,
+ IRQF_SHARED, dev_name(dev), block);
+ if (ret) {
+ dev_err(dev, "Unable to request irq %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < info->num_ports; i++) {
+ struct etraxfs_gpio_chip *chip = &chips[i];
+ struct bgpio_chip *bgc = &chip->bgc;
+ const struct etraxfs_gpio_port *port = &info->ports[i];
+ unsigned long flags = BGPIOF_READ_OUTPUT_REG_SET;
+ void __iomem *dat = regs + port->din;
+ void __iomem *set = regs + port->dout;
+ void __iomem *dirout = regs + port->oe;
+
+ chip->block = block;
+
+ if (dirout == set) {
+ dirout = set = NULL;
+ flags = BGPIOF_NO_OUTPUT;
+ }
+
+ ret = bgpio_init(bgc, dev, 4,
+ dat, set, NULL, dirout, NULL,
+ flags);
+ if (ret) {
+ dev_err(dev, "Unable to init port %s\n",
+ port->label);
+ continue;
+ }
+
+ bgc->gc.ngpio = port->ngpio;
+ bgc->gc.label = port->label;
+
+ bgc->gc.of_node = dev->of_node;
+ bgc->gc.of_gpio_n_cells = 3;
+ bgc->gc.of_xlate = etraxfs_gpio_of_xlate;
+
+ ret = gpiochip_add(&bgc->gc);
+ if (ret) {
+ dev_err(dev, "Unable to register port %s\n",
+ bgc->gc.label);
+ continue;
+ }
+
+ if (i > 0 && !allportsirq)
+ continue;
+
+ ret = gpiochip_irqchip_add(&bgc->gc, &etraxfs_gpio_irq_chip, 0,
+ handle_level_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "Unable to add irqchip to port %s\n",
+ bgc->gc.label);
+ }
+ }
+
+ return 0;
+}
+
+static struct platform_driver etraxfs_gpio_driver = {
+ .driver = {
+ .name = "etraxfs-gpio",
+ .of_match_table = of_match_ptr(etraxfs_gpio_of_table),
+ },
+ .probe = etraxfs_gpio_probe,
+};
+
+static int __init etraxfs_gpio_init(void)
+{
+ return platform_driver_register(&etraxfs_gpio_driver);
+}
+
+device_initcall(etraxfs_gpio_init);
diff --git a/kernel/drivers/gpio/gpio-f7188x.c b/kernel/drivers/gpio/gpio-f7188x.c
index dbda8433c..5e3c4fa67 100644
--- a/kernel/drivers/gpio/gpio-f7188x.c
+++ b/kernel/drivers/gpio/gpio-f7188x.c
@@ -172,7 +172,7 @@ static struct f7188x_gpio_bank f71869a_gpio_bank[] = {
};
static struct f7188x_gpio_bank f71882_gpio_bank[] = {
- F7188X_GPIO_BANK(0 , 8, 0xF0),
+ F7188X_GPIO_BANK(0, 8, 0xF0),
F7188X_GPIO_BANK(10, 8, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 4, 0xC0),
@@ -180,7 +180,7 @@ static struct f7188x_gpio_bank f71882_gpio_bank[] = {
};
static struct f7188x_gpio_bank f71889_gpio_bank[] = {
- F7188X_GPIO_BANK(0 , 7, 0xF0),
+ F7188X_GPIO_BANK(0, 7, 0xF0),
F7188X_GPIO_BANK(10, 7, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 8, 0xC0),
diff --git a/kernel/drivers/gpio/gpio-generic.c b/kernel/drivers/gpio/gpio-generic.c
index b92a690f5..88ae70ddb 100644
--- a/kernel/drivers/gpio/gpio-generic.c
+++ b/kernel/drivers/gpio/gpio-generic.c
@@ -135,6 +135,17 @@ static unsigned long bgpio_pin2mask_be(struct bgpio_chip *bgc,
return 1 << (bgc->bits - 1 - pin);
}
+static int bgpio_get_set(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct bgpio_chip *bgc = to_bgpio_chip(gc);
+ unsigned long pinmask = bgc->pin2mask(bgc, gpio);
+
+ if (bgc->dir & pinmask)
+ return !!(bgc->read_reg(bgc->reg_set) & pinmask);
+ else
+ return !!(bgc->read_reg(bgc->reg_dat) & pinmask);
+}
+
static int bgpio_get(struct gpio_chip *gc, unsigned int gpio)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
@@ -142,6 +153,10 @@ static int bgpio_get(struct gpio_chip *gc, unsigned int gpio)
return !!(bgc->read_reg(bgc->reg_dat) & bgc->pin2mask(bgc, gpio));
}
+static void bgpio_set_none(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+}
+
static void bgpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
@@ -268,6 +283,12 @@ static int bgpio_simple_dir_in(struct gpio_chip *gc, unsigned int gpio)
return 0;
}
+static int bgpio_dir_out_err(struct gpio_chip *gc, unsigned int gpio,
+ int val)
+{
+ return -EINVAL;
+}
+
static int bgpio_simple_dir_out(struct gpio_chip *gc, unsigned int gpio,
int val)
{
@@ -291,6 +312,14 @@ static int bgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
return 0;
}
+static int bgpio_get_dir(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct bgpio_chip *bgc = to_bgpio_chip(gc);
+
+ return (bgc->read_reg(bgc->reg_dir) & bgc->pin2mask(bgc, gpio)) ?
+ GPIOF_DIR_OUT : GPIOF_DIR_IN;
+}
+
static int bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
@@ -340,6 +369,14 @@ static int bgpio_dir_out_inv(struct gpio_chip *gc, unsigned int gpio, int val)
return 0;
}
+static int bgpio_get_dir_inv(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct bgpio_chip *bgc = to_bgpio_chip(gc);
+
+ return (bgc->read_reg(bgc->reg_dir) & bgc->pin2mask(bgc, gpio)) ?
+ GPIOF_DIR_IN : GPIOF_DIR_OUT;
+}
+
static int bgpio_setup_accessors(struct device *dev,
struct bgpio_chip *bgc,
bool bit_be,
@@ -416,7 +453,8 @@ static int bgpio_setup_accessors(struct device *dev,
static int bgpio_setup_io(struct bgpio_chip *bgc,
void __iomem *dat,
void __iomem *set,
- void __iomem *clr)
+ void __iomem *clr,
+ unsigned long flags)
{
bgc->reg_dat = dat;
@@ -432,19 +470,27 @@ static int bgpio_setup_io(struct bgpio_chip *bgc,
bgc->reg_set = set;
bgc->gc.set = bgpio_set_set;
bgc->gc.set_multiple = bgpio_set_multiple_set;
+ } else if (flags & BGPIOF_NO_OUTPUT) {
+ bgc->gc.set = bgpio_set_none;
+ bgc->gc.set_multiple = NULL;
} else {
bgc->gc.set = bgpio_set;
bgc->gc.set_multiple = bgpio_set_multiple;
}
- bgc->gc.get = bgpio_get;
+ if (!(flags & BGPIOF_UNREADABLE_REG_SET) &&
+ (flags & BGPIOF_READ_OUTPUT_REG_SET))
+ bgc->gc.get = bgpio_get_set;
+ else
+ bgc->gc.get = bgpio_get;
return 0;
}
static int bgpio_setup_direction(struct bgpio_chip *bgc,
void __iomem *dirout,
- void __iomem *dirin)
+ void __iomem *dirin,
+ unsigned long flags)
{
if (dirout && dirin) {
return -EINVAL;
@@ -452,12 +498,17 @@ static int bgpio_setup_direction(struct bgpio_chip *bgc,
bgc->reg_dir = dirout;
bgc->gc.direction_output = bgpio_dir_out;
bgc->gc.direction_input = bgpio_dir_in;
+ bgc->gc.get_direction = bgpio_get_dir;
} else if (dirin) {
bgc->reg_dir = dirin;
bgc->gc.direction_output = bgpio_dir_out_inv;
bgc->gc.direction_input = bgpio_dir_in_inv;
+ bgc->gc.get_direction = bgpio_get_dir_inv;
} else {
- bgc->gc.direction_output = bgpio_simple_dir_out;
+ if (flags & BGPIOF_NO_OUTPUT)
+ bgc->gc.direction_output = bgpio_dir_out_err;
+ else
+ bgc->gc.direction_output = bgpio_simple_dir_out;
bgc->gc.direction_input = bgpio_simple_dir_in;
}
@@ -500,7 +551,7 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
bgc->gc.ngpio = bgc->bits;
bgc->gc.request = bgpio_request;
- ret = bgpio_setup_io(bgc, dat, set, clr);
+ ret = bgpio_setup_io(bgc, dat, set, clr, flags);
if (ret)
return ret;
@@ -509,7 +560,7 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
if (ret)
return ret;
- ret = bgpio_setup_direction(bgc, dirout, dirin);
+ ret = bgpio_setup_direction(bgc, dirout, dirin, flags);
if (ret)
return ret;
@@ -528,40 +579,20 @@ EXPORT_SYMBOL_GPL(bgpio_init);
static void __iomem *bgpio_map(struct platform_device *pdev,
const char *name,
- resource_size_t sane_sz,
- int *err)
+ resource_size_t sane_sz)
{
- struct device *dev = &pdev->dev;
struct resource *r;
- resource_size_t start;
resource_size_t sz;
- void __iomem *ret;
-
- *err = 0;
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
if (!r)
return NULL;
sz = resource_size(r);
- if (sz != sane_sz) {
- *err = -EINVAL;
- return NULL;
- }
-
- start = r->start;
- if (!devm_request_mem_region(dev, start, sz, r->name)) {
- *err = -EBUSY;
- return NULL;
- }
-
- ret = devm_ioremap(dev, start, sz);
- if (!ret) {
- *err = -ENOMEM;
- return NULL;
- }
+ if (sz != sane_sz)
+ return IOMEM_ERR_PTR(-EINVAL);
- return ret;
+ return devm_ioremap_resource(&pdev->dev, r);
}
static int bgpio_pdev_probe(struct platform_device *pdev)
@@ -585,25 +616,25 @@ static int bgpio_pdev_probe(struct platform_device *pdev)
sz = resource_size(r);
- dat = bgpio_map(pdev, "dat", sz, &err);
- if (!dat)
- return err ? err : -EINVAL;
+ dat = bgpio_map(pdev, "dat", sz);
+ if (IS_ERR(dat))
+ return PTR_ERR(dat);
- set = bgpio_map(pdev, "set", sz, &err);
- if (err)
- return err;
+ set = bgpio_map(pdev, "set", sz);
+ if (IS_ERR(set))
+ return PTR_ERR(set);
- clr = bgpio_map(pdev, "clr", sz, &err);
- if (err)
- return err;
+ clr = bgpio_map(pdev, "clr", sz);
+ if (IS_ERR(clr))
+ return PTR_ERR(clr);
- dirout = bgpio_map(pdev, "dirout", sz, &err);
- if (err)
- return err;
+ dirout = bgpio_map(pdev, "dirout", sz);
+ if (IS_ERR(dirout))
+ return PTR_ERR(dirout);
- dirin = bgpio_map(pdev, "dirin", sz, &err);
- if (err)
- return err;
+ dirin = bgpio_map(pdev, "dirin", sz);
+ if (IS_ERR(dirin))
+ return PTR_ERR(dirin);
bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
if (!bgc)
diff --git a/kernel/drivers/gpio/gpio-grgpio.c b/kernel/drivers/gpio/gpio-grgpio.c
index 35a02770c..801423fe8 100644
--- a/kernel/drivers/gpio/gpio-grgpio.c
+++ b/kernel/drivers/gpio/gpio-grgpio.c
@@ -104,17 +104,12 @@ static void grgpio_set_imask(struct grgpio_priv *priv, unsigned int offset,
{
struct bgpio_chip *bgc = &priv->bgc;
unsigned long mask = bgc->pin2mask(bgc, offset);
- unsigned long flags;
-
- spin_lock_irqsave(&bgc->lock, flags);
if (val)
priv->imask |= mask;
else
priv->imask &= ~mask;
bgc->write_reg(priv->regs + GRGPIO_IMASK, priv->imask);
-
- spin_unlock_irqrestore(&bgc->lock, flags);
}
static int grgpio_to_irq(struct gpio_chip *gc, unsigned offset)
@@ -180,16 +175,26 @@ static void grgpio_irq_mask(struct irq_data *d)
{
struct grgpio_priv *priv = irq_data_get_irq_chip_data(d);
int offset = d->hwirq;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
grgpio_set_imask(priv, offset, 0);
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
}
static void grgpio_irq_unmask(struct irq_data *d)
{
struct grgpio_priv *priv = irq_data_get_irq_chip_data(d);
int offset = d->hwirq;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
grgpio_set_imask(priv, offset, 1);
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
}
static struct irq_chip grgpio_irq_chip = {
@@ -281,12 +286,7 @@ static int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
irq_set_chip_data(irq, priv);
irq_set_chip_and_handler(irq, &grgpio_irq_chip,
handle_simple_irq);
- irq_clear_status_flags(irq, IRQ_NOREQUEST);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
irq_set_noprobe(irq);
-#endif
return ret;
}
@@ -301,9 +301,6 @@ static void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
int ngpio = priv->bgc.gc.ngpio;
int i;
-#ifdef CONFIG_ARM
- set_irq_flags(irq, 0);
-#endif
irq_set_chip_and_handler(irq, NULL, NULL);
irq_set_chip_data(irq, NULL);
@@ -332,7 +329,7 @@ static void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
spin_unlock_irqrestore(&priv->bgc.lock, flags);
}
-static struct irq_domain_ops grgpio_irq_domain_ops = {
+static const struct irq_domain_ops grgpio_irq_domain_ops = {
.map = grgpio_irq_map,
.unmap = grgpio_irq_unmap,
};
diff --git a/kernel/drivers/gpio/gpio-intel-mid.c b/kernel/drivers/gpio/gpio-intel-mid.c
index aa28c65eb..70097472b 100644
--- a/kernel/drivers/gpio/gpio-intel-mid.c
+++ b/kernel/drivers/gpio/gpio-intel-mid.c
@@ -301,7 +301,7 @@ static const struct pci_device_id intel_gpio_ids[] = {
};
MODULE_DEVICE_TABLE(pci, intel_gpio_ids);
-static void intel_mid_irq_handler(unsigned irq, struct irq_desc *desc)
+static void intel_mid_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct intel_mid_gpio *priv = to_intel_gpio_priv(gc);
diff --git a/kernel/drivers/gpio/gpio-it87.c b/kernel/drivers/gpio/gpio-it87.c
new file mode 100644
index 000000000..21f6f7c0e
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-it87.c
@@ -0,0 +1,411 @@
+/*
+ * GPIO interface for IT87xx Super I/O chips
+ *
+ * Author: Diego Elio Pettenò <flameeyes@flameeyes.eu>
+ *
+ * Based on it87_wdt.c by Oliver Schuster
+ * gpio-it8761e.c by Denis Turischev
+ * gpio-stmpe.c by Rabin Vincent
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+
+/* Chip Id numbers */
+#define NO_DEV_ID 0xffff
+#define IT8728_ID 0x8728
+#define IT8732_ID 0x8732
+#define IT8761_ID 0x8761
+
+/* IO Ports */
+#define REG 0x2e
+#define VAL 0x2f
+
+/* Logical device Numbers LDN */
+#define GPIO 0x07
+
+/* Configuration Registers and Functions */
+#define LDNREG 0x07
+#define CHIPID 0x20
+#define CHIPREV 0x22
+
+/**
+ * struct it87_gpio - it87-specific GPIO chip
+ * @chip the underlying gpio_chip structure
+ * @lock a lock to avoid races between operations
+ * @io_base base address for gpio ports
+ * @io_size size of the port rage starting from io_base.
+ * @output_base Super I/O register address for Output Enable register
+ * @simple_base Super I/O 'Simple I/O' Enable register
+ * @simple_size Super IO 'Simple I/O' Enable register size; this is
+ * required because IT87xx chips might only provide Simple I/O
+ * switches on a subset of lines, whereas the others keep the
+ * same status all time.
+ */
+struct it87_gpio {
+ struct gpio_chip chip;
+ spinlock_t lock;
+ u16 io_base;
+ u16 io_size;
+ u8 output_base;
+ u8 simple_base;
+ u8 simple_size;
+};
+
+static struct it87_gpio it87_gpio_chip = {
+ .lock = __SPIN_LOCK_UNLOCKED(it87_gpio_chip.lock),
+};
+
+static inline struct it87_gpio *to_it87_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct it87_gpio, chip);
+}
+
+/* Superio chip access functions; copied from wdt_it87 */
+
+static inline int superio_enter(void)
+{
+ /*
+ * Try to reserve REG and REG + 1 for exclusive access.
+ */
+ if (!request_muxed_region(REG, 2, KBUILD_MODNAME))
+ return -EBUSY;
+
+ outb(0x87, REG);
+ outb(0x01, REG);
+ outb(0x55, REG);
+ outb(0x55, REG);
+ return 0;
+}
+
+static inline void superio_exit(void)
+{
+ outb(0x02, REG);
+ outb(0x02, VAL);
+ release_region(REG, 2);
+}
+
+static inline void superio_select(int ldn)
+{
+ outb(LDNREG, REG);
+ outb(ldn, VAL);
+}
+
+static inline int superio_inb(int reg)
+{
+ outb(reg, REG);
+ return inb(VAL);
+}
+
+static inline void superio_outb(int val, int reg)
+{
+ outb(reg, REG);
+ outb(val, VAL);
+}
+
+static inline int superio_inw(int reg)
+{
+ int val;
+
+ outb(reg++, REG);
+ val = inb(VAL) << 8;
+ outb(reg, REG);
+ val |= inb(VAL);
+ return val;
+}
+
+static inline void superio_outw(int val, int reg)
+{
+ outb(reg++, REG);
+ outb(val >> 8, VAL);
+ outb(reg, REG);
+ outb(val, VAL);
+}
+
+static inline void superio_set_mask(int mask, int reg)
+{
+ u8 curr_val = superio_inb(reg);
+ u8 new_val = curr_val | mask;
+
+ if (curr_val != new_val)
+ superio_outb(new_val, reg);
+}
+
+static inline void superio_clear_mask(int mask, int reg)
+{
+ u8 curr_val = superio_inb(reg);
+ u8 new_val = curr_val & ~mask;
+
+ if (curr_val != new_val)
+ superio_outb(new_val, reg);
+}
+
+static int it87_gpio_request(struct gpio_chip *chip, unsigned gpio_num)
+{
+ u8 mask, group;
+ int rc = 0;
+ struct it87_gpio *it87_gpio = to_it87_gpio(chip);
+
+ mask = 1 << (gpio_num % 8);
+ group = (gpio_num / 8);
+
+ spin_lock(&it87_gpio->lock);
+
+ rc = superio_enter();
+ if (rc)
+ goto exit;
+
+ /* not all the IT87xx chips support Simple I/O and not all of
+ * them allow all the lines to be set/unset to Simple I/O.
+ */
+ if (group < it87_gpio->simple_size)
+ superio_set_mask(mask, group + it87_gpio->simple_base);
+
+ /* clear output enable, setting the pin to input, as all the
+ * newly-exported GPIO interfaces are set to input.
+ */
+ superio_clear_mask(mask, group + it87_gpio->output_base);
+
+ superio_exit();
+
+exit:
+ spin_unlock(&it87_gpio->lock);
+ return rc;
+}
+
+static int it87_gpio_get(struct gpio_chip *chip, unsigned gpio_num)
+{
+ u16 reg;
+ u8 mask;
+ struct it87_gpio *it87_gpio = to_it87_gpio(chip);
+
+ mask = 1 << (gpio_num % 8);
+ reg = (gpio_num / 8) + it87_gpio->io_base;
+
+ return !!(inb(reg) & mask);
+}
+
+static int it87_gpio_direction_in(struct gpio_chip *chip, unsigned gpio_num)
+{
+ u8 mask, group;
+ int rc = 0;
+ struct it87_gpio *it87_gpio = to_it87_gpio(chip);
+
+ mask = 1 << (gpio_num % 8);
+ group = (gpio_num / 8);
+
+ spin_lock(&it87_gpio->lock);
+
+ rc = superio_enter();
+ if (rc)
+ goto exit;
+
+ /* clear the output enable bit */
+ superio_clear_mask(mask, group + it87_gpio->output_base);
+
+ superio_exit();
+
+exit:
+ spin_unlock(&it87_gpio->lock);
+ return rc;
+}
+
+static void it87_gpio_set(struct gpio_chip *chip,
+ unsigned gpio_num, int val)
+{
+ u8 mask, curr_vals;
+ u16 reg;
+ struct it87_gpio *it87_gpio = to_it87_gpio(chip);
+
+ mask = 1 << (gpio_num % 8);
+ reg = (gpio_num / 8) + it87_gpio->io_base;
+
+ curr_vals = inb(reg);
+ if (val)
+ outb(curr_vals | mask, reg);
+ else
+ outb(curr_vals & ~mask, reg);
+}
+
+static int it87_gpio_direction_out(struct gpio_chip *chip,
+ unsigned gpio_num, int val)
+{
+ u8 mask, group;
+ int rc = 0;
+ struct it87_gpio *it87_gpio = to_it87_gpio(chip);
+
+ mask = 1 << (gpio_num % 8);
+ group = (gpio_num / 8);
+
+ spin_lock(&it87_gpio->lock);
+
+ rc = superio_enter();
+ if (rc)
+ goto exit;
+
+ /* set the output enable bit */
+ superio_set_mask(mask, group + it87_gpio->output_base);
+
+ it87_gpio_set(chip, gpio_num, val);
+
+ superio_exit();
+
+exit:
+ spin_unlock(&it87_gpio->lock);
+ return rc;
+}
+
+static struct gpio_chip it87_template_chip = {
+ .label = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ .request = it87_gpio_request,
+ .get = it87_gpio_get,
+ .direction_input = it87_gpio_direction_in,
+ .set = it87_gpio_set,
+ .direction_output = it87_gpio_direction_out,
+ .base = -1
+};
+
+static int __init it87_gpio_init(void)
+{
+ int rc = 0, i;
+ u16 chip_type;
+ u8 chip_rev, gpio_ba_reg;
+ char *labels, **labels_table;
+
+ struct it87_gpio *it87_gpio = &it87_gpio_chip;
+
+ rc = superio_enter();
+ if (rc)
+ return rc;
+
+ chip_type = superio_inw(CHIPID);
+ chip_rev = superio_inb(CHIPREV) & 0x0f;
+ superio_exit();
+
+ it87_gpio->chip = it87_template_chip;
+
+ switch (chip_type) {
+ case IT8728_ID:
+ case IT8732_ID:
+ gpio_ba_reg = 0x62;
+ it87_gpio->io_size = 8;
+ it87_gpio->output_base = 0xc8;
+ it87_gpio->simple_base = 0xc0;
+ it87_gpio->simple_size = 5;
+ it87_gpio->chip.ngpio = 64;
+ break;
+ case IT8761_ID:
+ gpio_ba_reg = 0x60;
+ it87_gpio->io_size = 4;
+ it87_gpio->output_base = 0xf0;
+ it87_gpio->simple_size = 0;
+ it87_gpio->chip.ngpio = 16;
+ break;
+ case NO_DEV_ID:
+ pr_err("no device\n");
+ return -ENODEV;
+ default:
+ pr_err("Unknown Chip found, Chip %04x Revision %x\n",
+ chip_type, chip_rev);
+ return -ENODEV;
+ }
+
+ rc = superio_enter();
+ if (rc)
+ return rc;
+
+ superio_select(GPIO);
+
+ /* fetch GPIO base address */
+ it87_gpio->io_base = superio_inw(gpio_ba_reg);
+
+ superio_exit();
+
+ pr_info("Found Chip IT%04x rev %x. %u GPIO lines starting at %04xh\n",
+ chip_type, chip_rev, it87_gpio->chip.ngpio,
+ it87_gpio->io_base);
+
+ if (!request_region(it87_gpio->io_base, it87_gpio->io_size,
+ KBUILD_MODNAME))
+ return -EBUSY;
+
+ /* Set up aliases for the GPIO connection.
+ *
+ * ITE documentation for recent chips such as the IT8728F
+ * refers to the GPIO lines as GPxy, with a coordinates system
+ * where x is the GPIO group (starting from 1) and y is the
+ * bit within the group.
+ *
+ * By creating these aliases, we make it easier to understand
+ * to which GPIO pin we're referring to.
+ */
+ labels = kcalloc(it87_gpio->chip.ngpio, sizeof("it87_gpXY"),
+ GFP_KERNEL);
+ labels_table = kcalloc(it87_gpio->chip.ngpio, sizeof(const char *),
+ GFP_KERNEL);
+
+ if (!labels || !labels_table) {
+ rc = -ENOMEM;
+ goto labels_free;
+ }
+
+ for (i = 0; i < it87_gpio->chip.ngpio; i++) {
+ char *label = &labels[i * sizeof("it87_gpXY")];
+
+ sprintf(label, "it87_gp%u%u", 1+(i/8), i%8);
+ labels_table[i] = label;
+ }
+
+ it87_gpio->chip.names = (const char *const*)labels_table;
+
+ rc = gpiochip_add(&it87_gpio->chip);
+ if (rc)
+ goto labels_free;
+
+ return 0;
+
+labels_free:
+ kfree(labels_table);
+ kfree(labels);
+ release_region(it87_gpio->io_base, it87_gpio->io_size);
+ return rc;
+}
+
+static void __exit it87_gpio_exit(void)
+{
+ struct it87_gpio *it87_gpio = &it87_gpio_chip;
+
+ gpiochip_remove(&it87_gpio->chip);
+ release_region(it87_gpio->io_base, it87_gpio->io_size);
+ kfree(it87_gpio->chip.names[0]);
+ kfree(it87_gpio->chip.names);
+}
+
+module_init(it87_gpio_init);
+module_exit(it87_gpio_exit);
+
+MODULE_AUTHOR("Diego Elio Pettenò <flameeyes@flameeyes.eu>");
+MODULE_DESCRIPTION("GPIO interface for IT87xx Super I/O chips");
+MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/gpio/gpio-it8761e.c b/kernel/drivers/gpio/gpio-it8761e.c
deleted file mode 100644
index dadfc245c..000000000
--- a/kernel/drivers/gpio/gpio-it8761e.c
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- * GPIO interface for IT8761E Super I/O chip
- *
- * Author: Denis Turischev <denis@compulab.co.il>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License 2 as published
- * by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-
-#include <linux/gpio.h>
-
-#define SIO_CHIP_ID 0x8761
-#define CHIP_ID_HIGH_BYTE 0x20
-#define CHIP_ID_LOW_BYTE 0x21
-
-static u8 ports[2] = { 0x2e, 0x4e };
-static u8 port;
-
-static DEFINE_SPINLOCK(sio_lock);
-
-#define GPIO_NAME "it8761-gpio"
-#define GPIO_BA_HIGH_BYTE 0x60
-#define GPIO_BA_LOW_BYTE 0x61
-#define GPIO_IOSIZE 4
-#define GPIO1X_IO 0xf0
-#define GPIO2X_IO 0xf1
-
-static u16 gpio_ba;
-
-static u8 read_reg(u8 addr, u8 port)
-{
- outb(addr, port);
- return inb(port + 1);
-}
-
-static void write_reg(u8 data, u8 addr, u8 port)
-{
- outb(addr, port);
- outb(data, port + 1);
-}
-
-static void enter_conf_mode(u8 port)
-{
- outb(0x87, port);
- outb(0x61, port);
- outb(0x55, port);
- outb((port == 0x2e) ? 0x55 : 0xaa, port);
-}
-
-static void exit_conf_mode(u8 port)
-{
- outb(0x2, port);
- outb(0x2, port + 1);
-}
-
-static void enter_gpio_mode(u8 port)
-{
- write_reg(0x2, 0x7, port);
-}
-
-static int it8761e_gpio_get(struct gpio_chip *gc, unsigned gpio_num)
-{
- u16 reg;
- u8 bit;
-
- bit = gpio_num % 8;
- reg = (gpio_num >= 8) ? gpio_ba + 1 : gpio_ba;
-
- return !!(inb(reg) & (1 << bit));
-}
-
-static int it8761e_gpio_direction_in(struct gpio_chip *gc, unsigned gpio_num)
-{
- u8 curr_dirs;
- u8 io_reg, bit;
-
- bit = gpio_num % 8;
- io_reg = (gpio_num >= 8) ? GPIO2X_IO : GPIO1X_IO;
-
- spin_lock(&sio_lock);
-
- enter_conf_mode(port);
- enter_gpio_mode(port);
-
- curr_dirs = read_reg(io_reg, port);
-
- if (curr_dirs & (1 << bit))
- write_reg(curr_dirs & ~(1 << bit), io_reg, port);
-
- exit_conf_mode(port);
-
- spin_unlock(&sio_lock);
- return 0;
-}
-
-static void it8761e_gpio_set(struct gpio_chip *gc,
- unsigned gpio_num, int val)
-{
- u8 curr_vals, bit;
- u16 reg;
-
- bit = gpio_num % 8;
- reg = (gpio_num >= 8) ? gpio_ba + 1 : gpio_ba;
-
- spin_lock(&sio_lock);
-
- curr_vals = inb(reg);
- if (val)
- outb(curr_vals | (1 << bit) , reg);
- else
- outb(curr_vals & ~(1 << bit), reg);
-
- spin_unlock(&sio_lock);
-}
-
-static int it8761e_gpio_direction_out(struct gpio_chip *gc,
- unsigned gpio_num, int val)
-{
- u8 curr_dirs, io_reg, bit;
-
- bit = gpio_num % 8;
- io_reg = (gpio_num >= 8) ? GPIO2X_IO : GPIO1X_IO;
-
- it8761e_gpio_set(gc, gpio_num, val);
-
- spin_lock(&sio_lock);
-
- enter_conf_mode(port);
- enter_gpio_mode(port);
-
- curr_dirs = read_reg(io_reg, port);
-
- if (!(curr_dirs & (1 << bit)))
- write_reg(curr_dirs | (1 << bit), io_reg, port);
-
- exit_conf_mode(port);
-
- spin_unlock(&sio_lock);
- return 0;
-}
-
-static struct gpio_chip it8761e_gpio_chip = {
- .label = GPIO_NAME,
- .owner = THIS_MODULE,
- .get = it8761e_gpio_get,
- .direction_input = it8761e_gpio_direction_in,
- .set = it8761e_gpio_set,
- .direction_output = it8761e_gpio_direction_out,
-};
-
-static int __init it8761e_gpio_init(void)
-{
- int i, id, err;
-
- /* chip and port detection */
- for (i = 0; i < ARRAY_SIZE(ports); i++) {
- spin_lock(&sio_lock);
- enter_conf_mode(ports[i]);
-
- id = (read_reg(CHIP_ID_HIGH_BYTE, ports[i]) << 8) +
- read_reg(CHIP_ID_LOW_BYTE, ports[i]);
-
- exit_conf_mode(ports[i]);
- spin_unlock(&sio_lock);
-
- if (id == SIO_CHIP_ID) {
- port = ports[i];
- break;
- }
- }
-
- if (!port)
- return -ENODEV;
-
- /* fetch GPIO base address */
- enter_conf_mode(port);
- enter_gpio_mode(port);
- gpio_ba = (read_reg(GPIO_BA_HIGH_BYTE, port) << 8) +
- read_reg(GPIO_BA_LOW_BYTE, port);
- exit_conf_mode(port);
-
- if (!request_region(gpio_ba, GPIO_IOSIZE, GPIO_NAME))
- return -EBUSY;
-
- it8761e_gpio_chip.base = -1;
- it8761e_gpio_chip.ngpio = 16;
-
- err = gpiochip_add(&it8761e_gpio_chip);
- if (err < 0)
- goto gpiochip_add_err;
-
- return 0;
-
-gpiochip_add_err:
- release_region(gpio_ba, GPIO_IOSIZE);
- gpio_ba = 0;
- return err;
-}
-
-static void __exit it8761e_gpio_exit(void)
-{
- if (gpio_ba) {
- gpiochip_remove(&it8761e_gpio_chip);
- release_region(gpio_ba, GPIO_IOSIZE);
- gpio_ba = 0;
- }
-}
-module_init(it8761e_gpio_init);
-module_exit(it8761e_gpio_exit);
-
-MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
-MODULE_DESCRIPTION("GPIO interface for IT8761E Super I/O chip");
-MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/gpio/gpio-lpc18xx.c b/kernel/drivers/gpio/gpio-lpc18xx.c
new file mode 100644
index 000000000..e39dcb0af
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-lpc18xx.c
@@ -0,0 +1,170 @@
+/*
+ * GPIO driver for NXP LPC18xx/43xx.
+ *
+ * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+
+/* LPC18xx GPIO register offsets */
+#define LPC18XX_REG_DIR(n) (0x2000 + n * sizeof(u32))
+
+#define LPC18XX_MAX_PORTS 8
+#define LPC18XX_PINS_PER_PORT 32
+
+struct lpc18xx_gpio_chip {
+ struct gpio_chip gpio;
+ void __iomem *base;
+ struct clk *clk;
+ spinlock_t lock;
+};
+
+static inline struct lpc18xx_gpio_chip *to_lpc18xx_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct lpc18xx_gpio_chip, gpio);
+}
+
+static void lpc18xx_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip);
+ writeb(value ? 1 : 0, gc->base + offset);
+}
+
+static int lpc18xx_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip);
+ return !!readb(gc->base + offset);
+}
+
+static int lpc18xx_gpio_direction(struct gpio_chip *chip, unsigned offset,
+ bool out)
+{
+ struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip);
+ unsigned long flags;
+ u32 port, pin, dir;
+
+ port = offset / LPC18XX_PINS_PER_PORT;
+ pin = offset % LPC18XX_PINS_PER_PORT;
+
+ spin_lock_irqsave(&gc->lock, flags);
+ dir = readl(gc->base + LPC18XX_REG_DIR(port));
+ if (out)
+ dir |= BIT(pin);
+ else
+ dir &= ~BIT(pin);
+ writel(dir, gc->base + LPC18XX_REG_DIR(port));
+ spin_unlock_irqrestore(&gc->lock, flags);
+
+ return 0;
+}
+
+static int lpc18xx_gpio_direction_input(struct gpio_chip *chip,
+ unsigned offset)
+{
+ return lpc18xx_gpio_direction(chip, offset, false);
+}
+
+static int lpc18xx_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ lpc18xx_gpio_set(chip, offset, value);
+ return lpc18xx_gpio_direction(chip, offset, true);
+}
+
+static struct gpio_chip lpc18xx_chip = {
+ .label = "lpc18xx/43xx-gpio",
+ .request = gpiochip_generic_request,
+ .free = gpiochip_generic_free,
+ .direction_input = lpc18xx_gpio_direction_input,
+ .direction_output = lpc18xx_gpio_direction_output,
+ .set = lpc18xx_gpio_set,
+ .get = lpc18xx_gpio_get,
+ .ngpio = LPC18XX_MAX_PORTS * LPC18XX_PINS_PER_PORT,
+ .owner = THIS_MODULE,
+};
+
+static int lpc18xx_gpio_probe(struct platform_device *pdev)
+{
+ struct lpc18xx_gpio_chip *gc;
+ struct resource *res;
+ int ret;
+
+ gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
+ if (!gc)
+ return -ENOMEM;
+
+ gc->gpio = lpc18xx_chip;
+ platform_set_drvdata(pdev, gc);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ gc->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(gc->base))
+ return PTR_ERR(gc->base);
+
+ gc->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(gc->clk)) {
+ dev_err(&pdev->dev, "input clock not found\n");
+ return PTR_ERR(gc->clk);
+ }
+
+ ret = clk_prepare_enable(gc->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to enable clock\n");
+ return ret;
+ }
+
+ spin_lock_init(&gc->lock);
+
+ gc->gpio.dev = &pdev->dev;
+
+ ret = gpiochip_add(&gc->gpio);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add gpio chip\n");
+ clk_disable_unprepare(gc->clk);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lpc18xx_gpio_remove(struct platform_device *pdev)
+{
+ struct lpc18xx_gpio_chip *gc = platform_get_drvdata(pdev);
+
+ gpiochip_remove(&gc->gpio);
+ clk_disable_unprepare(gc->clk);
+
+ return 0;
+}
+
+static const struct of_device_id lpc18xx_gpio_match[] = {
+ { .compatible = "nxp,lpc1850-gpio" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lpc18xx_gpio_match);
+
+static struct platform_driver lpc18xx_gpio_driver = {
+ .probe = lpc18xx_gpio_probe,
+ .remove = lpc18xx_gpio_remove,
+ .driver = {
+ .name = "lpc18xx-gpio",
+ .of_match_table = lpc18xx_gpio_match,
+ },
+};
+module_platform_driver(lpc18xx_gpio_driver);
+
+MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
+MODULE_DESCRIPTION("GPIO driver for LPC18xx/43xx");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/gpio/gpio-lynxpoint.c b/kernel/drivers/gpio/gpio-lynxpoint.c
index 127c755b3..127c37b38 100644
--- a/kernel/drivers/gpio/gpio-lynxpoint.c
+++ b/kernel/drivers/gpio/gpio-lynxpoint.c
@@ -72,7 +72,7 @@ struct lp_gpio {
*
* per gpio specific registers consist of two 32bit registers per gpio
* (LP_CONFIG1 and LP_CONFIG2), with 94 gpios there's a total of
- * 188 config registes.
+ * 188 config registers.
*
* A simplified view of the register layout look like this:
*
@@ -234,7 +234,7 @@ static int lp_gpio_direction_output(struct gpio_chip *chip,
return 0;
}
-static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
+static void lp_gpio_irq_handler(struct irq_desc *desc)
{
struct irq_data *data = irq_desc_get_irq_data(desc);
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
diff --git a/kernel/drivers/gpio/gpio-max7301.c b/kernel/drivers/gpio/gpio-max7301.c
index 6e1c984a7..05813fbf3 100644
--- a/kernel/drivers/gpio/gpio-max7301.c
+++ b/kernel/drivers/gpio/gpio-max7301.c
@@ -87,7 +87,6 @@ MODULE_DEVICE_TABLE(spi, max7301_id);
static struct spi_driver max7301_driver = {
.driver = {
.name = "max7301",
- .owner = THIS_MODULE,
},
.probe = max7301_probe,
.remove = max7301_remove,
diff --git a/kernel/drivers/gpio/gpio-max730x.c b/kernel/drivers/gpio/gpio-max730x.c
index 18ab89e20..0f57d2d24 100644
--- a/kernel/drivers/gpio/gpio-max730x.c
+++ b/kernel/drivers/gpio/gpio-max730x.c
@@ -236,7 +236,6 @@ int __max730x_remove(struct device *dev)
ts->write(dev, 0x04, 0x00);
gpiochip_remove(&ts->chip);
mutex_destroy(&ts->lock);
- kfree(ts);
return 0;
}
EXPORT_SYMBOL_GPL(__max730x_remove);
diff --git a/kernel/drivers/gpio/gpio-max732x.c b/kernel/drivers/gpio/gpio-max732x.c
index 0fa4543c5..8c5252c6c 100644
--- a/kernel/drivers/gpio/gpio-max732x.c
+++ b/kernel/drivers/gpio/gpio-max732x.c
@@ -429,6 +429,14 @@ static int max732x_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
+static int max732x_irq_set_wake(struct irq_data *data, unsigned int on)
+{
+ struct max732x_chip *chip = irq_data_get_irq_chip_data(data);
+
+ irq_set_irq_wake(chip->client->irq, on);
+ return 0;
+}
+
static struct irq_chip max732x_irq_chip = {
.name = "max732x",
.irq_mask = max732x_irq_mask,
@@ -436,6 +444,7 @@ static struct irq_chip max732x_irq_chip = {
.irq_bus_lock = max732x_irq_bus_lock,
.irq_bus_sync_unlock = max732x_irq_bus_sync_unlock,
.irq_set_type = max732x_irq_set_type,
+ .irq_set_wake = max732x_irq_set_wake,
};
static uint8_t max732x_irq_pending(struct max732x_chip *chip)
@@ -507,12 +516,10 @@ static int max732x_irq_setup(struct max732x_chip *chip,
chip->irq_features = has_irq;
mutex_init(&chip->irq_lock);
- ret = devm_request_threaded_irq(&client->dev,
- client->irq,
- NULL,
- max732x_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- dev_name(&client->dev), chip);
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, max732x_irq_handler, IRQF_ONESHOT |
+ IRQF_TRIGGER_FALLING | IRQF_SHARED,
+ dev_name(&client->dev), chip);
if (ret) {
dev_err(&client->dev, "failed to request irq %d\n",
client->irq);
@@ -521,7 +528,7 @@ static int max732x_irq_setup(struct max732x_chip *chip,
ret = gpiochip_irqchip_add(&chip->gpio_chip,
&max732x_irq_chip,
irq_base,
- handle_edge_irq,
+ handle_simple_irq,
IRQ_TYPE_NONE);
if (ret) {
dev_err(&client->dev,
@@ -596,6 +603,7 @@ static int max732x_setup_gpio(struct max732x_chip *chip,
gc->base = gpio_start;
gc->ngpio = port;
gc->label = chip->client->name;
+ gc->dev = &chip->client->dev;
gc->owner = THIS_MODULE;
return port;
@@ -677,9 +685,14 @@ static int max732x_probe(struct i2c_client *client,
mutex_init(&chip->lock);
- max732x_readb(chip, is_group_a(chip, 0), &chip->reg_out[0]);
- if (nr_port > 8)
- max732x_readb(chip, is_group_a(chip, 8), &chip->reg_out[1]);
+ ret = max732x_readb(chip, is_group_a(chip, 0), &chip->reg_out[0]);
+ if (ret)
+ goto out_failed;
+ if (nr_port > 8) {
+ ret = max732x_readb(chip, is_group_a(chip, 8), &chip->reg_out[1]);
+ if (ret)
+ goto out_failed;
+ }
ret = gpiochip_add(&chip->gpio_chip);
if (ret)
diff --git a/kernel/drivers/gpio/gpio-mc33880.c b/kernel/drivers/gpio/gpio-mc33880.c
index a431604c9..2853731db 100644
--- a/kernel/drivers/gpio/gpio-mc33880.c
+++ b/kernel/drivers/gpio/gpio-mc33880.c
@@ -163,7 +163,6 @@ static int mc33880_remove(struct spi_device *spi)
static struct spi_driver mc33880_driver = {
.driver = {
.name = DRIVER_NAME,
- .owner = THIS_MODULE,
},
.probe = mc33880_probe,
.remove = mc33880_remove,
diff --git a/kernel/drivers/gpio/gpio-mcp23s08.c b/kernel/drivers/gpio/gpio-mcp23s08.c
index 2fc7ff852..4a4169491 100644
--- a/kernel/drivers/gpio/gpio-mcp23s08.c
+++ b/kernel/drivers/gpio/gpio-mcp23s08.c
@@ -507,11 +507,7 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
irq_set_chip_data(irq, mcp);
irq_set_chip(irq, &mcp23s08_irq_chip);
irq_set_nested_thread(irq, true);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
irq_set_noprobe(irq);
-#endif
}
return 0;
}
@@ -852,7 +848,6 @@ MODULE_DEVICE_TABLE(i2c, mcp230xx_id);
static struct i2c_driver mcp230xx_driver = {
.driver = {
.name = "mcp230xx",
- .owner = THIS_MODULE,
.of_match_table = of_match_ptr(mcp23s08_i2c_of_match),
},
.probe = mcp230xx_probe,
@@ -1025,7 +1020,6 @@ static struct spi_driver mcp23s08_driver = {
.id_table = mcp23s08_ids,
.driver = {
.name = "mcp23s08",
- .owner = THIS_MODULE,
.of_match_table = of_match_ptr(mcp23s08_spi_of_match),
},
};
diff --git a/kernel/drivers/gpio/gpio-moxart.c b/kernel/drivers/gpio/gpio-moxart.c
index c3ab46e59..d3355a6dc 100644
--- a/kernel/drivers/gpio/gpio-moxart.c
+++ b/kernel/drivers/gpio/gpio-moxart.c
@@ -29,27 +29,6 @@
#define GPIO_DATA_IN 0x04
#define GPIO_PIN_DIRECTION 0x08
-static int moxart_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
- return pinctrl_request_gpio(offset);
-}
-
-static void moxart_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- pinctrl_free_gpio(offset);
-}
-
-static int moxart_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- struct bgpio_chip *bgc = to_bgpio_chip(chip);
- u32 ret = bgc->read_reg(bgc->reg_dir);
-
- if (ret & BIT(offset))
- return !!(bgc->read_reg(bgc->reg_set) & BIT(offset));
- else
- return !!(bgc->read_reg(bgc->reg_dat) & BIT(offset));
-}
-
static int moxart_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -68,17 +47,17 @@ static int moxart_gpio_probe(struct platform_device *pdev)
return PTR_ERR(base);
ret = bgpio_init(bgc, dev, 4, base + GPIO_DATA_IN,
- base + GPIO_DATA_OUT, NULL,
- base + GPIO_PIN_DIRECTION, NULL, 0);
+ base + GPIO_DATA_OUT, NULL,
+ base + GPIO_PIN_DIRECTION, NULL,
+ BGPIOF_READ_OUTPUT_REG_SET);
if (ret) {
dev_err(&pdev->dev, "bgpio_init failed\n");
return ret;
}
bgc->gc.label = "moxart-gpio";
- bgc->gc.request = moxart_gpio_request;
- bgc->gc.free = moxart_gpio_free;
- bgc->gc.get = moxart_gpio_get;
+ bgc->gc.request = gpiochip_generic_request;
+ bgc->gc.free = gpiochip_generic_free;
bgc->data = bgc->read_reg(bgc->reg_set);
bgc->gc.base = 0;
bgc->gc.ngpio = 32;
diff --git a/kernel/drivers/gpio/gpio-mpc8xxx.c b/kernel/drivers/gpio/gpio-mpc8xxx.c
index a65b75161..48ef36834 100644
--- a/kernel/drivers/gpio/gpio-mpc8xxx.c
+++ b/kernel/drivers/gpio/gpio-mpc8xxx.c
@@ -32,7 +32,7 @@
struct mpc8xxx_gpio_chip {
struct of_mm_gpio_chip mm_gc;
- spinlock_t lock;
+ raw_spinlock_t lock;
/*
* shadowed data register to be able to clear/set output pins in
@@ -95,7 +95,7 @@ static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
unsigned long flags;
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
if (val)
mpc8xxx_gc->data |= mpc8xxx_gpio2mask(gpio);
@@ -104,7 +104,7 @@ static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc,
@@ -115,7 +115,7 @@ static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc,
unsigned long flags;
int i;
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
for (i = 0; i < gc->ngpio; i++) {
if (*mask == 0)
@@ -130,7 +130,7 @@ static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc,
out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
@@ -139,11 +139,11 @@ static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
unsigned long flags;
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
return 0;
}
@@ -156,11 +156,11 @@ static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val
mpc8xxx_gpio_set(gc, gpio, val);
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
return 0;
}
@@ -174,6 +174,15 @@ static int mpc5121_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val
return mpc8xxx_gpio_dir_out(gc, gpio, val);
}
+static int mpc5125_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+ /* GPIO 0..3 are input only on MPC5125 */
+ if (gpio <= 3)
+ return -EINVAL;
+
+ return mpc8xxx_gpio_dir_out(gc, gpio, val);
+}
+
static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
@@ -185,7 +194,7 @@ static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
return -ENXIO;
}
-static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
+static void mpc8xxx_gpio_irq_cascade(struct irq_desc *desc)
{
struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -206,11 +215,11 @@ static void mpc8xxx_irq_unmask(struct irq_data *d)
struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
unsigned long flags;
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
setbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
static void mpc8xxx_irq_mask(struct irq_data *d)
@@ -219,11 +228,11 @@ static void mpc8xxx_irq_mask(struct irq_data *d)
struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
unsigned long flags;
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
clrbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
static void mpc8xxx_irq_ack(struct irq_data *d)
@@ -242,17 +251,17 @@ static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
switch (flow_type) {
case IRQ_TYPE_EDGE_FALLING:
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
setbits32(mm->regs + GPIO_ICR,
mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
case IRQ_TYPE_EDGE_BOTH:
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
clrbits32(mm->regs + GPIO_ICR,
mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
default:
@@ -282,22 +291,22 @@ static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
switch (flow_type) {
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_LEVEL_LOW:
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
clrsetbits_be32(reg, 3 << shift, 2 << shift);
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_LEVEL_HIGH:
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
clrsetbits_be32(reg, 3 << shift, 1 << shift);
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
case IRQ_TYPE_EDGE_BOTH:
- spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
clrbits32(reg, 3 << shift);
- spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
default:
@@ -312,33 +321,56 @@ static struct irq_chip mpc8xxx_irq_chip = {
.irq_unmask = mpc8xxx_irq_unmask,
.irq_mask = mpc8xxx_irq_mask,
.irq_ack = mpc8xxx_irq_ack,
+ /* this might get overwritten in mpc8xxx_probe() */
.irq_set_type = mpc8xxx_irq_set_type,
};
static int mpc8xxx_gpio_irq_map(struct irq_domain *h, unsigned int irq,
irq_hw_number_t hwirq)
{
- struct mpc8xxx_gpio_chip *mpc8xxx_gc = h->host_data;
-
- if (mpc8xxx_gc->of_dev_id_data)
- mpc8xxx_irq_chip.irq_set_type = mpc8xxx_gc->of_dev_id_data;
-
irq_set_chip_data(irq, h->host_data);
irq_set_chip_and_handler(irq, &mpc8xxx_irq_chip, handle_level_irq);
return 0;
}
-static struct irq_domain_ops mpc8xxx_gpio_irq_ops = {
+static const struct irq_domain_ops mpc8xxx_gpio_irq_ops = {
.map = mpc8xxx_gpio_irq_map,
.xlate = irq_domain_xlate_twocell,
};
-static struct of_device_id mpc8xxx_gpio_ids[] = {
+struct mpc8xxx_gpio_devtype {
+ int (*gpio_dir_out)(struct gpio_chip *, unsigned int, int);
+ int (*gpio_get)(struct gpio_chip *, unsigned int);
+ int (*irq_set_type)(struct irq_data *, unsigned int);
+};
+
+static const struct mpc8xxx_gpio_devtype mpc512x_gpio_devtype = {
+ .gpio_dir_out = mpc5121_gpio_dir_out,
+ .irq_set_type = mpc512x_irq_set_type,
+};
+
+static const struct mpc8xxx_gpio_devtype mpc5125_gpio_devtype = {
+ .gpio_dir_out = mpc5125_gpio_dir_out,
+ .irq_set_type = mpc512x_irq_set_type,
+};
+
+static const struct mpc8xxx_gpio_devtype mpc8572_gpio_devtype = {
+ .gpio_get = mpc8572_gpio_get,
+};
+
+static const struct mpc8xxx_gpio_devtype mpc8xxx_gpio_devtype_default = {
+ .gpio_dir_out = mpc8xxx_gpio_dir_out,
+ .gpio_get = mpc8xxx_gpio_get,
+ .irq_set_type = mpc8xxx_irq_set_type,
+};
+
+static const struct of_device_id mpc8xxx_gpio_ids[] = {
{ .compatible = "fsl,mpc8349-gpio", },
- { .compatible = "fsl,mpc8572-gpio", },
+ { .compatible = "fsl,mpc8572-gpio", .data = &mpc8572_gpio_devtype, },
{ .compatible = "fsl,mpc8610-gpio", },
- { .compatible = "fsl,mpc5121-gpio", .data = mpc512x_irq_set_type, },
+ { .compatible = "fsl,mpc5121-gpio", .data = &mpc512x_gpio_devtype, },
+ { .compatible = "fsl,mpc5125-gpio", .data = &mpc5125_gpio_devtype, },
{ .compatible = "fsl,pq3-gpio", },
{ .compatible = "fsl,qoriq-gpio", },
{}
@@ -351,6 +383,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
struct of_mm_gpio_chip *mm_gc;
struct gpio_chip *gc;
const struct of_device_id *id;
+ const struct mpc8xxx_gpio_devtype *devtype =
+ of_device_get_match_data(&pdev->dev);
int ret;
mpc8xxx_gc = devm_kzalloc(&pdev->dev, sizeof(*mpc8xxx_gc), GFP_KERNEL);
@@ -359,7 +393,7 @@ static int mpc8xxx_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mpc8xxx_gc);
- spin_lock_init(&mpc8xxx_gc->lock);
+ raw_spin_lock_init(&mpc8xxx_gc->lock);
mm_gc = &mpc8xxx_gc->mm_gc;
gc = &mm_gc->gc;
@@ -367,10 +401,18 @@ static int mpc8xxx_probe(struct platform_device *pdev)
mm_gc->save_regs = mpc8xxx_gpio_save_regs;
gc->ngpio = MPC8XXX_GPIO_PINS;
gc->direction_input = mpc8xxx_gpio_dir_in;
- gc->direction_output = of_device_is_compatible(np, "fsl,mpc5121-gpio") ?
- mpc5121_gpio_dir_out : mpc8xxx_gpio_dir_out;
- gc->get = of_device_is_compatible(np, "fsl,mpc8572-gpio") ?
- mpc8572_gpio_get : mpc8xxx_gpio_get;
+
+ if (!devtype)
+ devtype = &mpc8xxx_gpio_devtype_default;
+
+ /*
+ * It's assumed that only a single type of gpio controller is available
+ * on the current machine, so overwriting global data is fine.
+ */
+ mpc8xxx_irq_chip.irq_set_type = devtype->irq_set_type;
+
+ gc->direction_output = devtype->gpio_dir_out ?: mpc8xxx_gpio_dir_out;
+ gc->get = devtype->gpio_get ?: mpc8xxx_gpio_get;
gc->set = mpc8xxx_gpio_set;
gc->set_multiple = mpc8xxx_gpio_set_multiple;
gc->to_irq = mpc8xxx_gpio_to_irq;
@@ -396,8 +438,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
out_be32(mm_gc->regs + GPIO_IER, 0xffffffff);
out_be32(mm_gc->regs + GPIO_IMR, 0);
- irq_set_handler_data(mpc8xxx_gc->irqn, mpc8xxx_gc);
- irq_set_chained_handler(mpc8xxx_gc->irqn, mpc8xxx_gpio_irq_cascade);
+ irq_set_chained_handler_and_data(mpc8xxx_gc->irqn,
+ mpc8xxx_gpio_irq_cascade, mpc8xxx_gc);
return 0;
}
@@ -407,8 +449,7 @@ static int mpc8xxx_remove(struct platform_device *pdev)
struct mpc8xxx_gpio_chip *mpc8xxx_gc = platform_get_drvdata(pdev);
if (mpc8xxx_gc->irq) {
- irq_set_handler_data(mpc8xxx_gc->irqn, NULL);
- irq_set_chained_handler(mpc8xxx_gc->irqn, NULL);
+ irq_set_chained_handler_and_data(mpc8xxx_gc->irqn, NULL, NULL);
irq_domain_remove(mpc8xxx_gc->irq);
}
diff --git a/kernel/drivers/gpio/gpio-msic.c b/kernel/drivers/gpio/gpio-msic.c
index 01acf0a8c..22523aae8 100644
--- a/kernel/drivers/gpio/gpio-msic.c
+++ b/kernel/drivers/gpio/gpio-msic.c
@@ -232,7 +232,7 @@ static struct irq_chip msic_irqchip = {
.irq_bus_sync_unlock = msic_bus_sync_unlock,
};
-static void msic_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+static void msic_gpio_irq_handler(struct irq_desc *desc)
{
struct irq_data *data = irq_desc_get_irq_data(desc);
struct msic_gpio *mg = irq_data_get_irq_handler_data(data);
@@ -309,8 +309,7 @@ static int platform_msic_gpio_probe(struct platform_device *pdev)
&msic_irqchip,
handle_simple_irq);
}
- irq_set_chained_handler(mg->irq, msic_gpio_irq_handler);
- irq_set_handler_data(mg->irq, mg);
+ irq_set_chained_handler_and_data(mg->irq, msic_gpio_irq_handler, mg);
return 0;
err:
diff --git a/kernel/drivers/gpio/gpio-msm-v2.c b/kernel/drivers/gpio/gpio-msm-v2.c
deleted file mode 100644
index 52ff18229..000000000
--- a/kernel/drivers/gpio/gpio-msm-v2.c
+++ /dev/null
@@ -1,462 +0,0 @@
-/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- */
-#define pr_fmt(fmt) "%s: " fmt, __func__
-
-#include <linux/bitmap.h>
-#include <linux/bitops.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irqchip/chained_irq.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-
-#define MAX_NR_GPIO 300
-
-/* Bits of interest in the GPIO_IN_OUT register.
- */
-enum {
- GPIO_IN = 0,
- GPIO_OUT = 1
-};
-
-/* Bits of interest in the GPIO_INTR_STATUS register.
- */
-enum {
- INTR_STATUS = 0,
-};
-
-/* Bits of interest in the GPIO_CFG register.
- */
-enum {
- GPIO_OE = 9,
-};
-
-/* Bits of interest in the GPIO_INTR_CFG register.
- * When a GPIO triggers, two separate decisions are made, controlled
- * by two separate flags.
- *
- * - First, INTR_RAW_STATUS_EN controls whether or not the GPIO_INTR_STATUS
- * register for that GPIO will be updated to reflect the triggering of that
- * gpio. If this bit is 0, this register will not be updated.
- * - Second, INTR_ENABLE controls whether an interrupt is triggered.
- *
- * If INTR_ENABLE is set and INTR_RAW_STATUS_EN is NOT set, an interrupt
- * can be triggered but the status register will not reflect it.
- */
-enum {
- INTR_ENABLE = 0,
- INTR_POL_CTL = 1,
- INTR_DECT_CTL = 2,
- INTR_RAW_STATUS_EN = 3,
-};
-
-/* Codes of interest in GPIO_INTR_CFG_SU.
- */
-enum {
- TARGET_PROC_SCORPION = 4,
- TARGET_PROC_NONE = 7,
-};
-
-/**
- * struct msm_gpio_dev: the MSM8660 SoC GPIO device structure
- *
- * @enabled_irqs: a bitmap used to optimize the summary-irq handler. By
- * keeping track of which gpios are unmasked as irq sources, we avoid
- * having to do readl calls on hundreds of iomapped registers each time
- * the summary interrupt fires in order to locate the active interrupts.
- *
- * @wake_irqs: a bitmap for tracking which interrupt lines are enabled
- * as wakeup sources. When the device is suspended, interrupts which are
- * not wakeup sources are disabled.
- *
- * @dual_edge_irqs: a bitmap used to track which irqs are configured
- * as dual-edge, as this is not supported by the hardware and requires
- * some special handling in the driver.
- */
-struct msm_gpio_dev {
- struct gpio_chip gpio_chip;
- DECLARE_BITMAP(enabled_irqs, MAX_NR_GPIO);
- DECLARE_BITMAP(wake_irqs, MAX_NR_GPIO);
- DECLARE_BITMAP(dual_edge_irqs, MAX_NR_GPIO);
- struct irq_domain *domain;
- int summary_irq;
- void __iomem *msm_tlmm_base;
-};
-
-static struct msm_gpio_dev msm_gpio;
-
-#define GPIO_INTR_CFG_SU(gpio) (msm_gpio.msm_tlmm_base + 0x0400 + \
- (0x04 * (gpio)))
-#define GPIO_CONFIG(gpio) (msm_gpio.msm_tlmm_base + 0x1000 + \
- (0x10 * (gpio)))
-#define GPIO_IN_OUT(gpio) (msm_gpio.msm_tlmm_base + 0x1004 + \
- (0x10 * (gpio)))
-#define GPIO_INTR_CFG(gpio) (msm_gpio.msm_tlmm_base + 0x1008 + \
- (0x10 * (gpio)))
-#define GPIO_INTR_STATUS(gpio) (msm_gpio.msm_tlmm_base + 0x100c + \
- (0x10 * (gpio)))
-
-static DEFINE_SPINLOCK(tlmm_lock);
-
-static inline struct msm_gpio_dev *to_msm_gpio_dev(struct gpio_chip *chip)
-{
- return container_of(chip, struct msm_gpio_dev, gpio_chip);
-}
-
-static inline void set_gpio_bits(unsigned n, void __iomem *reg)
-{
- writel(readl(reg) | n, reg);
-}
-
-static inline void clear_gpio_bits(unsigned n, void __iomem *reg)
-{
- writel(readl(reg) & ~n, reg);
-}
-
-static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- return readl(GPIO_IN_OUT(offset)) & BIT(GPIO_IN);
-}
-
-static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
-{
- writel(val ? BIT(GPIO_OUT) : 0, GPIO_IN_OUT(offset));
-}
-
-static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
- unsigned long irq_flags;
-
- spin_lock_irqsave(&tlmm_lock, irq_flags);
- clear_gpio_bits(BIT(GPIO_OE), GPIO_CONFIG(offset));
- spin_unlock_irqrestore(&tlmm_lock, irq_flags);
- return 0;
-}
-
-static int msm_gpio_direction_output(struct gpio_chip *chip,
- unsigned offset,
- int val)
-{
- unsigned long irq_flags;
-
- spin_lock_irqsave(&tlmm_lock, irq_flags);
- msm_gpio_set(chip, offset, val);
- set_gpio_bits(BIT(GPIO_OE), GPIO_CONFIG(offset));
- spin_unlock_irqrestore(&tlmm_lock, irq_flags);
- return 0;
-}
-
-static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
- return 0;
-}
-
-static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- return;
-}
-
-static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct msm_gpio_dev *g_dev = to_msm_gpio_dev(chip);
- struct irq_domain *domain = g_dev->domain;
-
- return irq_create_mapping(domain, offset);
-}
-
-static inline int msm_irq_to_gpio(struct gpio_chip *chip, unsigned irq)
-{
- struct irq_data *irq_data = irq_get_irq_data(irq);
-
- return irq_data->hwirq;
-}
-
-
-/* For dual-edge interrupts in software, since the hardware has no
- * such support:
- *
- * At appropriate moments, this function may be called to flip the polarity
- * settings of both-edge irq lines to try and catch the next edge.
- *
- * The attempt is considered successful if:
- * - the status bit goes high, indicating that an edge was caught, or
- * - the input value of the gpio doesn't change during the attempt.
- * If the value changes twice during the process, that would cause the first
- * test to fail but would force the second, as two opposite
- * transitions would cause a detection no matter the polarity setting.
- *
- * The do-loop tries to sledge-hammer closed the timing hole between
- * the initial value-read and the polarity-write - if the line value changes
- * during that window, an interrupt is lost, the new polarity setting is
- * incorrect, and the first success test will fail, causing a retry.
- *
- * Algorithm comes from Google's msmgpio driver, see mach-msm/gpio.c.
- */
-static void msm_gpio_update_dual_edge_pos(unsigned gpio)
-{
- int loop_limit = 100;
- unsigned val, val2, intstat;
-
- do {
- val = readl(GPIO_IN_OUT(gpio)) & BIT(GPIO_IN);
- if (val)
- clear_gpio_bits(BIT(INTR_POL_CTL), GPIO_INTR_CFG(gpio));
- else
- set_gpio_bits(BIT(INTR_POL_CTL), GPIO_INTR_CFG(gpio));
- val2 = readl(GPIO_IN_OUT(gpio)) & BIT(GPIO_IN);
- intstat = readl(GPIO_INTR_STATUS(gpio)) & BIT(INTR_STATUS);
- if (intstat || val == val2)
- return;
- } while (loop_limit-- > 0);
- pr_err("%s: dual-edge irq failed to stabilize, "
- "interrupts dropped. %#08x != %#08x\n",
- __func__, val, val2);
-}
-
-static void msm_gpio_irq_ack(struct irq_data *d)
-{
- int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
-
- writel(BIT(INTR_STATUS), GPIO_INTR_STATUS(gpio));
- if (test_bit(gpio, msm_gpio.dual_edge_irqs))
- msm_gpio_update_dual_edge_pos(gpio);
-}
-
-static void msm_gpio_irq_mask(struct irq_data *d)
-{
- int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
- unsigned long irq_flags;
-
- spin_lock_irqsave(&tlmm_lock, irq_flags);
- writel(TARGET_PROC_NONE, GPIO_INTR_CFG_SU(gpio));
- clear_gpio_bits(BIT(INTR_RAW_STATUS_EN) | BIT(INTR_ENABLE), GPIO_INTR_CFG(gpio));
- __clear_bit(gpio, msm_gpio.enabled_irqs);
- spin_unlock_irqrestore(&tlmm_lock, irq_flags);
-}
-
-static void msm_gpio_irq_unmask(struct irq_data *d)
-{
- int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
- unsigned long irq_flags;
-
- spin_lock_irqsave(&tlmm_lock, irq_flags);
- __set_bit(gpio, msm_gpio.enabled_irqs);
- set_gpio_bits(BIT(INTR_RAW_STATUS_EN) | BIT(INTR_ENABLE), GPIO_INTR_CFG(gpio));
- writel(TARGET_PROC_SCORPION, GPIO_INTR_CFG_SU(gpio));
- spin_unlock_irqrestore(&tlmm_lock, irq_flags);
-}
-
-static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
-{
- int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
- unsigned long irq_flags;
- uint32_t bits;
-
- spin_lock_irqsave(&tlmm_lock, irq_flags);
-
- bits = readl(GPIO_INTR_CFG(gpio));
-
- if (flow_type & IRQ_TYPE_EDGE_BOTH) {
- bits |= BIT(INTR_DECT_CTL);
- __irq_set_handler_locked(d->irq, handle_edge_irq);
- if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
- __set_bit(gpio, msm_gpio.dual_edge_irqs);
- else
- __clear_bit(gpio, msm_gpio.dual_edge_irqs);
- } else {
- bits &= ~BIT(INTR_DECT_CTL);
- __irq_set_handler_locked(d->irq, handle_level_irq);
- __clear_bit(gpio, msm_gpio.dual_edge_irqs);
- }
-
- if (flow_type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_LEVEL_HIGH))
- bits |= BIT(INTR_POL_CTL);
- else
- bits &= ~BIT(INTR_POL_CTL);
-
- writel(bits, GPIO_INTR_CFG(gpio));
-
- if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
- msm_gpio_update_dual_edge_pos(gpio);
-
- spin_unlock_irqrestore(&tlmm_lock, irq_flags);
-
- return 0;
-}
-
-/*
- * When the summary IRQ is raised, any number of GPIO lines may be high.
- * It is the job of the summary handler to find all those GPIO lines
- * which have been set as summary IRQ lines and which are triggered,
- * and to call their interrupt handlers.
- */
-static void msm_summary_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
- unsigned long i;
- struct irq_chip *chip = irq_desc_get_chip(desc);
-
- chained_irq_enter(chip, desc);
-
- for_each_set_bit(i, msm_gpio.enabled_irqs, MAX_NR_GPIO) {
- if (readl(GPIO_INTR_STATUS(i)) & BIT(INTR_STATUS))
- generic_handle_irq(irq_find_mapping(msm_gpio.domain,
- i));
- }
-
- chained_irq_exit(chip, desc);
-}
-
-static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
-{
- int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
-
- if (on) {
- if (bitmap_empty(msm_gpio.wake_irqs, MAX_NR_GPIO))
- irq_set_irq_wake(msm_gpio.summary_irq, 1);
- set_bit(gpio, msm_gpio.wake_irqs);
- } else {
- clear_bit(gpio, msm_gpio.wake_irqs);
- if (bitmap_empty(msm_gpio.wake_irqs, MAX_NR_GPIO))
- irq_set_irq_wake(msm_gpio.summary_irq, 0);
- }
-
- return 0;
-}
-
-static struct irq_chip msm_gpio_irq_chip = {
- .name = "msmgpio",
- .irq_mask = msm_gpio_irq_mask,
- .irq_unmask = msm_gpio_irq_unmask,
- .irq_ack = msm_gpio_irq_ack,
- .irq_set_type = msm_gpio_irq_set_type,
- .irq_set_wake = msm_gpio_irq_set_wake,
-};
-
-static struct lock_class_key msm_gpio_lock_class;
-
-static int msm_gpio_irq_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- irq_set_lockdep_class(irq, &msm_gpio_lock_class);
- irq_set_chip_and_handler(irq, &msm_gpio_irq_chip,
- handle_level_irq);
- set_irq_flags(irq, IRQF_VALID);
-
- return 0;
-}
-
-static const struct irq_domain_ops msm_gpio_irq_domain_ops = {
- .xlate = irq_domain_xlate_twocell,
- .map = msm_gpio_irq_domain_map,
-};
-
-static int msm_gpio_probe(struct platform_device *pdev)
-{
- int ret, ngpio;
- struct resource *res;
-
- if (of_property_read_u32(pdev->dev.of_node, "ngpio", &ngpio)) {
- dev_err(&pdev->dev, "%s: ngpio property missing\n", __func__);
- return -EINVAL;
- }
-
- if (ngpio > MAX_NR_GPIO)
- WARN(1, "ngpio exceeds the MAX_NR_GPIO. Increase MAX_NR_GPIO\n");
-
- bitmap_zero(msm_gpio.enabled_irqs, MAX_NR_GPIO);
- bitmap_zero(msm_gpio.wake_irqs, MAX_NR_GPIO);
- bitmap_zero(msm_gpio.dual_edge_irqs, MAX_NR_GPIO);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- msm_gpio.msm_tlmm_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(msm_gpio.msm_tlmm_base))
- return PTR_ERR(msm_gpio.msm_tlmm_base);
-
- msm_gpio.gpio_chip.ngpio = ngpio;
- msm_gpio.gpio_chip.label = pdev->name;
- msm_gpio.gpio_chip.dev = &pdev->dev;
- msm_gpio.gpio_chip.base = 0;
- msm_gpio.gpio_chip.direction_input = msm_gpio_direction_input;
- msm_gpio.gpio_chip.direction_output = msm_gpio_direction_output;
- msm_gpio.gpio_chip.get = msm_gpio_get;
- msm_gpio.gpio_chip.set = msm_gpio_set;
- msm_gpio.gpio_chip.to_irq = msm_gpio_to_irq;
- msm_gpio.gpio_chip.request = msm_gpio_request;
- msm_gpio.gpio_chip.free = msm_gpio_free;
-
- ret = gpiochip_add(&msm_gpio.gpio_chip);
- if (ret < 0) {
- dev_err(&pdev->dev, "gpiochip_add failed with error %d\n", ret);
- return ret;
- }
-
- msm_gpio.summary_irq = platform_get_irq(pdev, 0);
- if (msm_gpio.summary_irq < 0) {
- dev_err(&pdev->dev, "No Summary irq defined for msmgpio\n");
- return msm_gpio.summary_irq;
- }
-
- msm_gpio.domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
- &msm_gpio_irq_domain_ops,
- &msm_gpio);
- if (!msm_gpio.domain)
- return -ENODEV;
-
- irq_set_chained_handler(msm_gpio.summary_irq, msm_summary_irq_handler);
-
- return 0;
-}
-
-static const struct of_device_id msm_gpio_of_match[] = {
- { .compatible = "qcom,msm-gpio", },
- { },
-};
-MODULE_DEVICE_TABLE(of, msm_gpio_of_match);
-
-static int msm_gpio_remove(struct platform_device *dev)
-{
- gpiochip_remove(&msm_gpio.gpio_chip);
-
- irq_set_handler(msm_gpio.summary_irq, NULL);
-
- return 0;
-}
-
-static struct platform_driver msm_gpio_driver = {
- .probe = msm_gpio_probe,
- .remove = msm_gpio_remove,
- .driver = {
- .name = "msmgpio",
- .of_match_table = msm_gpio_of_match,
- },
-};
-
-module_platform_driver(msm_gpio_driver)
-
-MODULE_AUTHOR("Gregory Bean <gbean@codeaurora.org>");
-MODULE_DESCRIPTION("Driver for Qualcomm MSM TLMMv2 SoC GPIOs");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:msmgpio");
diff --git a/kernel/drivers/gpio/gpio-mvebu.c b/kernel/drivers/gpio/gpio-mvebu.c
index 1a5420586..d428b9787 100644
--- a/kernel/drivers/gpio/gpio-mvebu.c
+++ b/kernel/drivers/gpio/gpio-mvebu.c
@@ -185,16 +185,6 @@ static void __iomem *mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip)
* Functions implementing the gpio_chip methods
*/
-static int mvebu_gpio_request(struct gpio_chip *chip, unsigned pin)
-{
- return pinctrl_request_gpio(chip->base + pin);
-}
-
-static void mvebu_gpio_free(struct gpio_chip *chip, unsigned pin)
-{
- pinctrl_free_gpio(chip->base + pin);
-}
-
static void mvebu_gpio_set(struct gpio_chip *chip, unsigned pin, int value)
{
struct mvebu_gpio_chip *mvchip =
@@ -458,9 +448,9 @@ static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
-static void mvebu_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void mvebu_gpio_irq_handler(struct irq_desc *desc)
{
- struct mvebu_gpio_chip *mvchip = irq_get_handler_data(irq);
+ struct mvebu_gpio_chip *mvchip = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
u32 cause, type;
int i;
@@ -709,8 +699,8 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
mvchip->soc_variant = soc_variant;
mvchip->chip.label = dev_name(&pdev->dev);
mvchip->chip.dev = &pdev->dev;
- mvchip->chip.request = mvebu_gpio_request;
- mvchip->chip.free = mvebu_gpio_free;
+ mvchip->chip.request = gpiochip_generic_request;
+ mvchip->chip.free = gpiochip_generic_free;
mvchip->chip.direction_input = mvebu_gpio_direction_input;
mvchip->chip.get = mvebu_gpio_get;
mvchip->chip.direction_output = mvebu_gpio_direction_output;
@@ -787,8 +777,8 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
if (irq < 0)
continue;
- irq_set_handler_data(irq, mvchip);
- irq_set_chained_handler(irq, mvebu_gpio_irq_handler);
+ irq_set_chained_handler_and_data(irq, mvebu_gpio_irq_handler,
+ mvchip);
}
mvchip->irqbase = irq_alloc_descs(-1, 0, ngpios, -1);
diff --git a/kernel/drivers/gpio/gpio-mxc.c b/kernel/drivers/gpio/gpio-mxc.c
index 9f7446a7a..6ea8df6c7 100644
--- a/kernel/drivers/gpio/gpio-mxc.c
+++ b/kernel/drivers/gpio/gpio-mxc.c
@@ -33,7 +33,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/module.h>
-#include <asm-generic/bug.h>
+#include <linux/bug.h>
enum mxc_gpio_hwtype {
IMX1_GPIO, /* runs on i.mx1 */
@@ -131,7 +131,7 @@ static struct mxc_gpio_hwdata *mxc_gpio_hwdata;
#define GPIO_INT_FALL_EDGE (mxc_gpio_hwdata->fall_edge)
#define GPIO_INT_BOTH_EDGES 0x4
-static struct platform_device_id mxc_gpio_devtype[] = {
+static const struct platform_device_id mxc_gpio_devtype[] = {
{
.name = "imx1-gpio",
.driver_data = IMX1_GPIO,
@@ -272,11 +272,11 @@ static void mxc_gpio_irq_handler(struct mxc_gpio_port *port, u32 irq_stat)
}
/* MX1 and MX3 has one interrupt *per* gpio port */
-static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+static void mx3_gpio_irq_handler(struct irq_desc *desc)
{
u32 irq_stat;
- struct mxc_gpio_port *port = irq_get_handler_data(irq);
- struct irq_chip *chip = irq_get_chip(irq);
+ struct mxc_gpio_port *port = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
chained_irq_enter(chip, desc);
@@ -288,11 +288,11 @@ static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
}
/* MX2 has one interrupt *for all* gpio ports */
-static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+static void mx2_gpio_irq_handler(struct irq_desc *desc)
{
u32 irq_msk, irq_stat;
struct mxc_gpio_port *port;
- struct irq_chip *chip = irq_get_chip(irq);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
chained_irq_enter(chip, desc);
@@ -339,13 +339,15 @@ static int gpio_set_wake_irq(struct irq_data *d, u32 enable)
return 0;
}
-static void __init mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
+static int mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
gc = irq_alloc_generic_chip("gpio-mxc", 1, irq_base,
port->base, handle_level_irq);
+ if (!gc)
+ return -ENOMEM;
gc->private = port;
ct = gc->chip_types;
@@ -354,11 +356,14 @@ static void __init mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_set_irq_type;
ct->chip.irq_set_wake = gpio_set_wake_irq;
+ ct->chip.flags = IRQCHIP_MASK_ON_SUSPEND;
ct->regs.ack = GPIO_ISR;
ct->regs.mask = GPIO_IMR;
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
IRQ_NOREQUEST, 0);
+
+ return 0;
}
static void mxc_gpio_get_hw(struct platform_device *pdev)
@@ -437,20 +442,20 @@ static int mxc_gpio_probe(struct platform_device *pdev)
irq_set_chained_handler(port->irq, mx2_gpio_irq_handler);
} else {
/* setup one handler for each entry */
- irq_set_chained_handler(port->irq, mx3_gpio_irq_handler);
- irq_set_handler_data(port->irq, port);
- if (port->irq_high > 0) {
+ irq_set_chained_handler_and_data(port->irq,
+ mx3_gpio_irq_handler, port);
+ if (port->irq_high > 0)
/* setup handler for GPIO 16 to 31 */
- irq_set_chained_handler(port->irq_high,
- mx3_gpio_irq_handler);
- irq_set_handler_data(port->irq_high, port);
- }
+ irq_set_chained_handler_and_data(port->irq_high,
+ mx3_gpio_irq_handler,
+ port);
}
err = bgpio_init(&port->bgc, &pdev->dev, 4,
port->base + GPIO_PSR,
port->base + GPIO_DR, NULL,
- port->base + GPIO_GDIR, NULL, 0);
+ port->base + GPIO_GDIR, NULL,
+ BGPIOF_READ_OUTPUT_REG_SET);
if (err)
goto out_bgio;
@@ -476,12 +481,16 @@ static int mxc_gpio_probe(struct platform_device *pdev)
}
/* gpio-mxc can be a generic irq chip */
- mxc_gpio_init_gc(port, irq_base);
+ err = mxc_gpio_init_gc(port, irq_base);
+ if (err < 0)
+ goto out_irqdomain_remove;
list_add_tail(&port->node, &mxc_gpio_ports);
return 0;
+out_irqdomain_remove:
+ irq_domain_remove(port->domain);
out_irqdesc_free:
irq_free_descs(irq_base, 32);
out_gpiochip_remove:
diff --git a/kernel/drivers/gpio/gpio-mxs.c b/kernel/drivers/gpio/gpio-mxs.c
index 84cbda6ac..a4288f428 100644
--- a/kernel/drivers/gpio/gpio-mxs.c
+++ b/kernel/drivers/gpio/gpio-mxs.c
@@ -154,10 +154,10 @@ static void mxs_flip_edge(struct mxs_gpio_port *port, u32 gpio)
}
/* MXS has one interrupt *per* gpio port */
-static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+static void mxs_gpio_irq_handler(struct irq_desc *desc)
{
u32 irq_stat;
- struct mxs_gpio_port *port = irq_get_handler_data(irq);
+ struct mxs_gpio_port *port = irq_desc_get_handler_data(desc);
desc->irq_data.chip->irq_ack(&desc->irq_data);
@@ -196,13 +196,16 @@ static int mxs_gpio_set_wake_irq(struct irq_data *d, unsigned int enable)
return 0;
}
-static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
+static int __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
gc = irq_alloc_generic_chip("gpio-mxs", 1, irq_base,
port->base, handle_level_irq);
+ if (!gc)
+ return -ENOMEM;
+
gc->private = port;
ct = gc->chip_types;
@@ -216,6 +219,8 @@ static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
IRQ_NOREQUEST, 0);
+
+ return 0;
}
static int mxs_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
@@ -239,7 +244,7 @@ static int mxs_gpio_get_direction(struct gpio_chip *gc, unsigned offset)
return !(dir & mask);
}
-static struct platform_device_id mxs_gpio_ids[] = {
+static const struct platform_device_id mxs_gpio_ids[] = {
{
.name = "imx23-gpio",
.driver_data = IMX23_GPIO,
@@ -317,11 +322,13 @@ static int mxs_gpio_probe(struct platform_device *pdev)
}
/* gpio-mxs can be a generic irq chip */
- mxs_gpio_init_gc(port, irq_base);
+ err = mxs_gpio_init_gc(port, irq_base);
+ if (err < 0)
+ goto out_irqdomain_remove;
/* setup one handler for each entry */
- irq_set_chained_handler(port->irq, mxs_gpio_irq_handler);
- irq_set_handler_data(port->irq, port);
+ irq_set_chained_handler_and_data(port->irq, mxs_gpio_irq_handler,
+ port);
err = bgpio_init(&port->bgc, &pdev->dev, 4,
port->base + PINCTRL_DIN(port),
@@ -343,6 +350,8 @@ static int mxs_gpio_probe(struct platform_device *pdev)
out_bgpio_remove:
bgpio_remove(&port->bgc);
+out_irqdomain_remove:
+ irq_domain_remove(port->domain);
out_irqdesc_free:
irq_free_descs(irq_base, 32);
return err;
diff --git a/kernel/drivers/gpio/gpio-omap.c b/kernel/drivers/gpio/gpio-omap.c
index a0ace2758..f7fbb46d5 100644
--- a/kernel/drivers/gpio/gpio-omap.c
+++ b/kernel/drivers/gpio/gpio-omap.c
@@ -29,6 +29,7 @@
#include <linux/platform_data/gpio-omap.h>
#define OFF_MODE 1
+#define OMAP4_GPIO_DEBOUNCINGTIME_MASK 0xFF
static LIST_HEAD(omap_gpio_list);
@@ -50,7 +51,7 @@ struct gpio_regs {
struct gpio_bank {
struct list_head node;
void __iomem *base;
- u16 irq;
+ int irq;
u32 non_wakeup_gpios;
u32 enabled_non_wakeup_gpios;
struct gpio_regs context;
@@ -58,6 +59,7 @@ struct gpio_bank {
u32 level_mask;
u32 toggle_mask;
raw_spinlock_t lock;
+ raw_spinlock_t wa_lock;
struct gpio_chip chip;
struct clk *dbck;
u32 mod_usage;
@@ -175,7 +177,7 @@ static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set
static inline void omap_gpio_dbck_enable(struct gpio_bank *bank)
{
if (bank->dbck_enable_mask && !bank->dbck_enabled) {
- clk_prepare_enable(bank->dbck);
+ clk_enable(bank->dbck);
bank->dbck_enabled = true;
writel_relaxed(bank->dbck_enable_mask,
@@ -193,7 +195,7 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank)
*/
writel_relaxed(0, bank->base + bank->regs->debounce_en);
- clk_disable_unprepare(bank->dbck);
+ clk_disable(bank->dbck);
bank->dbck_enabled = false;
}
}
@@ -204,8 +206,9 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank)
* @offset: the gpio number on this @bank
* @debounce: debounce time to use
*
- * OMAP's debounce time is in 31us steps so we need
- * to convert and round up to the closest unit.
+ * OMAP's debounce time is in 31us steps
+ * <debounce time> = (GPIO_DEBOUNCINGTIME[7:0].DEBOUNCETIME + 1) x 31
+ * so we need to convert and round up to the closest unit.
*/
static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset,
unsigned debounce)
@@ -213,34 +216,33 @@ static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset,
void __iomem *reg;
u32 val;
u32 l;
+ bool enable = !!debounce;
if (!bank->dbck_flag)
return;
- if (debounce < 32)
- debounce = 0x01;
- else if (debounce > 7936)
- debounce = 0xff;
- else
- debounce = (debounce / 0x1f) - 1;
+ if (enable) {
+ debounce = DIV_ROUND_UP(debounce, 31) - 1;
+ debounce &= OMAP4_GPIO_DEBOUNCINGTIME_MASK;
+ }
l = BIT(offset);
- clk_prepare_enable(bank->dbck);
+ clk_enable(bank->dbck);
reg = bank->base + bank->regs->debounce;
writel_relaxed(debounce, reg);
reg = bank->base + bank->regs->debounce_en;
val = readl_relaxed(reg);
- if (debounce)
+ if (enable)
val |= l;
else
val &= ~l;
bank->dbck_enable_mask = val;
writel_relaxed(val, reg);
- clk_disable_unprepare(bank->dbck);
+ clk_disable(bank->dbck);
/*
* Enable debounce clock per module.
* This call is mandatory because in omap_gpio_request() when
@@ -285,7 +287,7 @@ static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset)
bank->context.debounce = 0;
writel_relaxed(bank->context.debounce, bank->base +
bank->regs->debounce);
- clk_disable_unprepare(bank->dbck);
+ clk_disable(bank->dbck);
bank->dbck_enabled = false;
}
}
@@ -488,9 +490,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
unsigned long flags;
unsigned offset = d->hwirq;
- if (!BANK_USED(bank))
- pm_runtime_get_sync(bank->dev);
-
if (type & ~IRQ_TYPE_SENSE_MASK)
return -EINVAL;
@@ -500,18 +499,26 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
raw_spin_lock_irqsave(&bank->lock, flags);
retval = omap_set_gpio_triggering(bank, offset, type);
+ if (retval) {
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+ goto error;
+ }
omap_gpio_init_irq(bank, offset);
if (!omap_gpio_is_input(bank, offset)) {
raw_spin_unlock_irqrestore(&bank->lock, flags);
- return -EINVAL;
+ retval = -EINVAL;
+ goto error;
}
raw_spin_unlock_irqrestore(&bank->lock, flags);
if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
- __irq_set_handler_locked(d->irq, handle_level_irq);
+ irq_set_handler_locked(d, handle_level_irq);
else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
- __irq_set_handler_locked(d->irq, handle_edge_irq);
+ irq_set_handler_locked(d, handle_edge_irq);
+
+ return 0;
+error:
return retval;
}
@@ -638,22 +645,18 @@ static int omap_set_gpio_wakeup(struct gpio_bank *bank, unsigned offset,
return 0;
}
-static void omap_reset_gpio(struct gpio_bank *bank, unsigned offset)
-{
- omap_set_gpio_direction(bank, offset, 1);
- omap_set_gpio_irqenable(bank, offset, 0);
- omap_clear_gpio_irqstatus(bank, offset);
- omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
- omap_clear_gpio_debounce(bank, offset);
-}
-
/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable)
{
struct gpio_bank *bank = omap_irq_data_get_bank(d);
unsigned offset = d->hwirq;
+ int ret;
+
+ ret = omap_set_gpio_wakeup(bank, offset, enable);
+ if (!ret)
+ ret = irq_set_irq_wake(bank->irq, enable);
- return omap_set_gpio_wakeup(bank, offset, enable);
+ return ret;
}
static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
@@ -669,14 +672,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
pm_runtime_get_sync(bank->dev);
raw_spin_lock_irqsave(&bank->lock, flags);
- /* Set trigger to none. You need to enable the desired trigger with
- * request_irq() or set_irq_type(). Only do this if the IRQ line has
- * not already been requested.
- */
- if (!LINE_USED(bank->irq_usage, offset)) {
- omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
- omap_enable_gpio_module(bank, offset);
- }
+ omap_enable_gpio_module(bank, offset);
bank->mod_usage |= BIT(offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
@@ -690,8 +686,11 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
raw_spin_lock_irqsave(&bank->lock, flags);
bank->mod_usage &= ~(BIT(offset));
+ if (!LINE_USED(bank->irq_usage, offset)) {
+ omap_set_gpio_direction(bank, offset, 1);
+ omap_clear_gpio_debounce(bank, offset);
+ }
omap_disable_gpio_module(bank, offset);
- omap_reset_gpio(bank, offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
/*
@@ -711,29 +710,27 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
* line's interrupt handler has been run, we may miss some nested
* interrupts.
*/
-static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank)
{
void __iomem *isr_reg = NULL;
u32 isr;
unsigned int bit;
- struct gpio_bank *bank;
- int unmasked = 0;
- struct irq_chip *irqchip = irq_desc_get_chip(desc);
- struct gpio_chip *chip = irq_get_handler_data(irq);
+ struct gpio_bank *bank = gpiobank;
+ unsigned long wa_lock_flags;
+ unsigned long lock_flags;
- chained_irq_enter(irqchip, desc);
-
- bank = container_of(chip, struct gpio_bank, chip);
isr_reg = bank->base + bank->regs->irqstatus;
- pm_runtime_get_sync(bank->dev);
-
if (WARN_ON(!isr_reg))
goto exit;
+ pm_runtime_get_sync(bank->dev);
+
while (1) {
u32 isr_saved, level_mask = 0;
u32 enabled;
+ raw_spin_lock_irqsave(&bank->lock, lock_flags);
+
enabled = omap_get_gpio_irqbank_mask(bank);
isr_saved = isr = readl_relaxed(isr_reg) & enabled;
@@ -747,12 +744,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
omap_clear_gpio_irqbank(bank, isr_saved & ~level_mask);
omap_enable_gpio_irqbank(bank, isr_saved & ~level_mask);
- /* if there is only edge sensitive GPIO pin interrupts
- configured, we could unmask GPIO bank interrupt immediately */
- if (!level_mask && !unmasked) {
- unmasked = 1;
- chained_irq_exit(irqchip, desc);
- }
+ raw_spin_unlock_irqrestore(&bank->lock, lock_flags);
if (!isr)
break;
@@ -761,6 +753,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
bit = __ffs(isr);
isr &= ~(BIT(bit));
+ raw_spin_lock_irqsave(&bank->lock, lock_flags);
/*
* Some chips can't respond to both rising and falling
* at the same time. If this irq was requested with
@@ -771,18 +764,20 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
if (bank->toggle_mask & (BIT(bit)))
omap_toggle_gpio_edge_triggering(bank, bit);
+ raw_spin_unlock_irqrestore(&bank->lock, lock_flags);
+
+ raw_spin_lock_irqsave(&bank->wa_lock, wa_lock_flags);
+
generic_handle_irq(irq_find_mapping(bank->chip.irqdomain,
bit));
+
+ raw_spin_unlock_irqrestore(&bank->wa_lock,
+ wa_lock_flags);
}
}
- /* if bank has any level sensitive GPIO pin interrupt
- configured, we must unmask the bank interrupt only after
- handler(s) are executed in order to avoid spurious bank
- interrupt */
exit:
- if (!unmasked)
- chained_irq_exit(irqchip, desc);
pm_runtime_put(bank->dev);
+ return IRQ_HANDLED;
}
static unsigned int omap_gpio_irq_startup(struct irq_data *d)
@@ -791,15 +786,22 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d)
unsigned long flags;
unsigned offset = d->hwirq;
- if (!BANK_USED(bank))
- pm_runtime_get_sync(bank->dev);
-
raw_spin_lock_irqsave(&bank->lock, flags);
- omap_gpio_init_irq(bank, offset);
+
+ if (!LINE_USED(bank->mod_usage, offset))
+ omap_set_gpio_direction(bank, offset, 1);
+ else if (!omap_gpio_is_input(bank, offset))
+ goto err;
+ omap_enable_gpio_module(bank, offset);
+ bank->irq_usage |= BIT(offset);
+
raw_spin_unlock_irqrestore(&bank->lock, flags);
omap_gpio_unmask_irq(d);
return 0;
+err:
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+ return -EINVAL;
}
static void omap_gpio_irq_shutdown(struct irq_data *d)
@@ -810,9 +812,26 @@ static void omap_gpio_irq_shutdown(struct irq_data *d)
raw_spin_lock_irqsave(&bank->lock, flags);
bank->irq_usage &= ~(BIT(offset));
+ omap_set_gpio_irqenable(bank, offset, 0);
+ omap_clear_gpio_irqstatus(bank, offset);
+ omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
+ if (!LINE_USED(bank->mod_usage, offset))
+ omap_clear_gpio_debounce(bank, offset);
omap_disable_gpio_module(bank, offset);
- omap_reset_gpio(bank, offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+static void omap_gpio_irq_bus_lock(struct irq_data *data)
+{
+ struct gpio_bank *bank = omap_irq_data_get_bank(data);
+
+ if (!BANK_USED(bank))
+ pm_runtime_get_sync(bank->dev);
+}
+
+static void gpio_irq_bus_sync_unlock(struct irq_data *data)
+{
+ struct gpio_bank *bank = omap_irq_data_get_bank(data);
/*
* If this is the last IRQ to be freed in the bank,
@@ -1048,10 +1067,6 @@ static void omap_gpio_mod_init(struct gpio_bank *bank)
/* Initialize interface clk ungated, module enabled */
if (bank->regs->ctrl)
writel_relaxed(0, base + bank->regs->ctrl);
-
- bank->dbck = clk_get(bank->dev, "dbclk");
- if (IS_ERR(bank->dbck))
- dev_err(bank->dev, "Could not get gpio dbck\n");
}
static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
@@ -1080,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
} else {
bank->chip.label = "gpio";
bank->chip.base = gpio;
- gpio += bank->width;
}
bank->chip.ngpio = bank->width;
@@ -1090,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
return ret;
}
+ if (!bank->is_mpuio)
+ gpio += bank->width;
+
#ifdef CONFIG_ARCH_OMAP1
/*
* REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
@@ -1105,14 +1122,12 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
/* MPUIO is a bit different, reading IRQ status clears it */
if (bank->is_mpuio) {
irqc->irq_ack = dummy_irq_chip.irq_ack;
- irqc->irq_mask = irq_gc_mask_set_bit;
- irqc->irq_unmask = irq_gc_mask_clr_bit;
if (!bank->regs->wkup_en)
irqc->irq_set_wake = NULL;
}
ret = gpiochip_irqchip_add(&bank->chip, irqc,
- irq_base, omap_gpio_irq_handler,
+ irq_base, handle_bad_irq,
IRQ_TYPE_NONE);
if (ret) {
@@ -1121,10 +1136,14 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
return -ENODEV;
}
- gpiochip_set_chained_irqchip(&bank->chip, irqc,
- bank->irq, omap_gpio_irq_handler);
+ gpiochip_set_chained_irqchip(&bank->chip, irqc, bank->irq, NULL);
- return 0;
+ ret = devm_request_irq(bank->dev, bank->irq, omap_gpio_irq_handler,
+ 0, dev_name(bank->dev), bank);
+ if (ret)
+ gpiochip_remove(&bank->chip);
+
+ return ret;
}
static const struct of_device_id omap_gpio_match[];
@@ -1163,17 +1182,23 @@ static int omap_gpio_probe(struct platform_device *pdev)
irqc->irq_unmask = omap_gpio_unmask_irq,
irqc->irq_set_type = omap_gpio_irq_type,
irqc->irq_set_wake = omap_gpio_wake_enable,
+ irqc->irq_bus_lock = omap_gpio_irq_bus_lock,
+ irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock,
irqc->name = dev_name(&pdev->dev);
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (unlikely(!res)) {
- dev_err(dev, "Invalid IRQ resource\n");
- return -ENODEV;
+ bank->irq = platform_get_irq(pdev, 0);
+ if (bank->irq <= 0) {
+ if (!bank->irq)
+ bank->irq = -ENXIO;
+ if (bank->irq != -EPROBE_DEFER)
+ dev_err(dev,
+ "can't get irq resource ret=%d\n", bank->irq);
+ return bank->irq;
}
- bank->irq = res->start;
bank->dev = dev;
bank->chip.dev = dev;
+ bank->chip.owner = THIS_MODULE;
bank->dbck_flag = pdata->dbck_flag;
bank->stride = pdata->bank_stride;
bank->width = pdata->bank_width;
@@ -1200,15 +1225,26 @@ static int omap_gpio_probe(struct platform_device *pdev)
bank->set_dataout = omap_set_gpio_dataout_mask;
raw_spin_lock_init(&bank->lock);
+ raw_spin_lock_init(&bank->wa_lock);
/* Static mapping, never released */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
bank->base = devm_ioremap_resource(dev, res);
if (IS_ERR(bank->base)) {
- irq_domain_remove(bank->chip.irqdomain);
return PTR_ERR(bank->base);
}
+ if (bank->dbck_flag) {
+ bank->dbck = devm_clk_get(bank->dev, "dbclk");
+ if (IS_ERR(bank->dbck)) {
+ dev_err(bank->dev,
+ "Could not get gpio dbck. Disable debounce\n");
+ bank->dbck_flag = false;
+ } else {
+ clk_prepare(bank->dbck);
+ }
+ }
+
platform_set_drvdata(pdev, bank);
pm_runtime_enable(bank->dev);
@@ -1221,8 +1257,11 @@ static int omap_gpio_probe(struct platform_device *pdev)
omap_gpio_mod_init(bank);
ret = omap_gpio_chip_init(bank, irqc);
- if (ret)
+ if (ret) {
+ pm_runtime_put_sync(bank->dev);
+ pm_runtime_disable(bank->dev);
return ret;
+ }
omap_gpio_show_rev(bank);
@@ -1233,6 +1272,19 @@ static int omap_gpio_probe(struct platform_device *pdev)
return 0;
}
+static int omap_gpio_remove(struct platform_device *pdev)
+{
+ struct gpio_bank *bank = platform_get_drvdata(pdev);
+
+ list_del(&bank->node);
+ gpiochip_remove(&bank->chip);
+ pm_runtime_disable(bank->dev);
+ if (bank->dbck_flag)
+ clk_unprepare(bank->dbck);
+
+ return 0;
+}
+
#ifdef CONFIG_ARCH_OMAP2PLUS
#if defined(CONFIG_PM)
@@ -1418,6 +1470,7 @@ static int omap_gpio_runtime_resume(struct device *dev)
}
#endif /* CONFIG_PM */
+#if IS_BUILTIN(CONFIG_GPIO_OMAP)
void omap2_gpio_prepare_for_idle(int pwr_mode)
{
struct gpio_bank *bank;
@@ -1443,6 +1496,7 @@ void omap2_gpio_resume_after_idle(void)
pm_runtime_get_sync(bank->dev);
}
}
+#endif
#if defined(CONFIG_PM)
static void omap_gpio_init_context(struct gpio_bank *p)
@@ -1598,6 +1652,7 @@ MODULE_DEVICE_TABLE(of, omap_gpio_match);
static struct platform_driver omap_gpio_driver = {
.probe = omap_gpio_probe,
+ .remove = omap_gpio_remove,
.driver = {
.name = "omap_gpio",
.pm = &gpio_pm_ops,
@@ -1615,3 +1670,13 @@ static int __init omap_gpio_drv_reg(void)
return platform_driver_register(&omap_gpio_driver);
}
postcore_initcall(omap_gpio_drv_reg);
+
+static void __exit omap_gpio_exit(void)
+{
+ platform_driver_unregister(&omap_gpio_driver);
+}
+module_exit(omap_gpio_exit);
+
+MODULE_DESCRIPTION("omap gpio driver");
+MODULE_ALIAS("platform:gpio-omap");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/gpio/gpio-palmas.c b/kernel/drivers/gpio/gpio-palmas.c
index 171a6389f..52b447c07 100644
--- a/kernel/drivers/gpio/gpio-palmas.c
+++ b/kernel/drivers/gpio/gpio-palmas.c
@@ -167,6 +167,8 @@ static int palmas_gpio_probe(struct platform_device *pdev)
const struct palmas_device_data *dev_data;
match = of_match_device(of_palmas_gpio_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
dev_data = match->data;
if (!dev_data)
dev_data = &palmas_dev_data;
diff --git a/kernel/drivers/gpio/gpio-pca953x.c b/kernel/drivers/gpio/gpio-pca953x.c
index e2da64abb..2d4892cc7 100644
--- a/kernel/drivers/gpio/gpio-pca953x.c
+++ b/kernel/drivers/gpio/gpio-pca953x.c
@@ -21,6 +21,7 @@
#ifdef CONFIG_OF_GPIO
#include <linux/of_platform.h>
#endif
+#include <linux/acpi.h>
#define PCA953X_INPUT 0
#define PCA953X_OUTPUT 1
@@ -42,6 +43,9 @@
#define PCA_INT 0x0100
#define PCA953X_TYPE 0x1000
#define PCA957X_TYPE 0x2000
+#define PCA_TYPE_MASK 0xF000
+
+#define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK)
static const struct i2c_device_id pca953x_id[] = {
{ "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
@@ -67,11 +71,18 @@ static const struct i2c_device_id pca953x_id[] = {
{ "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
{ "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
+ { "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
{ "xra1202", 8 | PCA953X_TYPE },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca953x_id);
+static const struct acpi_device_id pca953x_acpi_ids[] = {
+ { "INT3491", 16 | PCA953X_TYPE | PCA_INT, },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
+
#define MAX_BANK 5
#define BANK_SZ 8
@@ -95,6 +106,7 @@ struct pca953x_chip {
struct gpio_chip gpio_chip;
const char *const *names;
int chip_type;
+ unsigned long driver_data;
};
static inline struct pca953x_chip *to_pca(struct gpio_chip *gc)
@@ -443,12 +455,13 @@ static struct irq_chip pca953x_irq_chip = {
.irq_set_type = pca953x_irq_set_type,
};
-static u8 pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
+static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
{
u8 cur_stat[MAX_BANK];
u8 old_stat[MAX_BANK];
- u8 pendings = 0;
- u8 trigger[MAX_BANK], triggers = 0;
+ bool pending_seen = false;
+ bool trigger_seen = false;
+ u8 trigger[MAX_BANK];
int ret, i, offset = 0;
switch (chip->chip_type) {
@@ -461,7 +474,7 @@ static u8 pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
}
ret = pca953x_read_regs(chip, offset, cur_stat);
if (ret)
- return 0;
+ return false;
/* Remove output pins from the equation */
for (i = 0; i < NBANK(chip); i++)
@@ -471,11 +484,12 @@ static u8 pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
for (i = 0; i < NBANK(chip); i++) {
trigger[i] = (cur_stat[i] ^ old_stat[i]) & chip->irq_mask[i];
- triggers += trigger[i];
+ if (trigger[i])
+ trigger_seen = true;
}
- if (!triggers)
- return 0;
+ if (!trigger_seen)
+ return false;
memcpy(chip->irq_stat, cur_stat, NBANK(chip));
@@ -483,10 +497,11 @@ static u8 pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
pending[i] = (old_stat[i] & chip->irq_trig_fall[i]) |
(cur_stat[i] & chip->irq_trig_raise[i]);
pending[i] &= trigger[i];
- pendings += pending[i];
+ if (pending[i])
+ pending_seen = true;
}
- return pendings;
+ return pending_seen;
}
static irqreturn_t pca953x_irq_handler(int irq, void *devid)
@@ -514,14 +529,13 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
}
static int pca953x_irq_setup(struct pca953x_chip *chip,
- const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
int ret, i, offset = 0;
if (client->irq && irq_base != -1
- && (id->driver_data & PCA_INT)) {
+ && (chip->driver_data & PCA_INT)) {
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -567,6 +581,10 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
"could not connect irqchip to gpiochip\n");
return ret;
}
+
+ gpiochip_set_chained_irqchip(&chip->gpio_chip,
+ &pca953x_irq_chip,
+ client->irq, NULL);
}
return 0;
@@ -574,12 +592,11 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
#else /* CONFIG_GPIO_PCA953X_IRQ */
static int pca953x_irq_setup(struct pca953x_chip *chip,
- const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
- if (irq_base != -1 && (id->driver_data & PCA_INT))
+ if (irq_base != -1 && (chip->driver_data & PCA_INT))
dev_warn(&client->dev, "interrupt support not compiled in\n");
return 0;
@@ -628,11 +645,15 @@ static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
memset(val, 0xFF, NBANK(chip));
else
memset(val, 0, NBANK(chip));
- pca953x_write_regs(chip, PCA957X_INVRT, val);
+ ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
+ if (ret)
+ goto out;
- /* To enable register 6, 7 to controll pull up and pull down */
+ /* To enable register 6, 7 to control pull up and pull down */
memset(val, 0x02, NBANK(chip));
- pca953x_write_regs(chip, PCA957X_BKEN, val);
+ ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
+ if (ret)
+ goto out;
return 0;
out:
@@ -666,14 +687,26 @@ static int pca953x_probe(struct i2c_client *client,
chip->client = client;
- chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE);
+ if (id) {
+ chip->driver_data = id->driver_data;
+ } else {
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(pca953x_acpi_ids, &client->dev);
+ if (!id)
+ return -ENODEV;
+
+ chip->driver_data = id->driver_data;
+ }
+
+ chip->chip_type = PCA_CHIP_TYPE(chip->driver_data);
mutex_init(&chip->i2c_lock);
/* initialize cached registers from their original values.
* we can't share this chip with another i2c master.
*/
- pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK);
+ pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
if (chip->chip_type == PCA953X_TYPE)
ret = device_pca953x_init(chip, invert);
@@ -686,7 +719,7 @@ static int pca953x_probe(struct i2c_client *client,
if (ret)
return ret;
- ret = pca953x_irq_setup(chip, id, irq_base);
+ ret = pca953x_irq_setup(chip, irq_base);
if (ret)
return ret;
@@ -758,6 +791,7 @@ static struct i2c_driver pca953x_driver = {
.driver = {
.name = "pca953x",
.of_match_table = pca953x_dt_ids,
+ .acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
},
.probe = pca953x_probe,
.remove = pca953x_remove,
diff --git a/kernel/drivers/gpio/gpio-pcf857x.c b/kernel/drivers/gpio/gpio-pcf857x.c
index 945f0cda8..1d4d9bc8b 100644
--- a/kernel/drivers/gpio/gpio-pcf857x.c
+++ b/kernel/drivers/gpio/gpio-pcf857x.c
@@ -88,9 +88,10 @@ struct pcf857x {
struct gpio_chip chip;
struct i2c_client *client;
struct mutex lock; /* protect 'out' */
- spinlock_t slock; /* protect irq demux */
unsigned out; /* software latch */
unsigned status; /* current status */
+ unsigned int irq_parent;
+ unsigned irq_enabled; /* enabled irqs */
int (*write)(struct i2c_client *client, unsigned data);
int (*read)(struct i2c_client *client);
@@ -183,23 +184,21 @@ static void pcf857x_set(struct gpio_chip *chip, unsigned offset, int value)
static irqreturn_t pcf857x_irq(int irq, void *data)
{
struct pcf857x *gpio = data;
- unsigned long change, i, status, flags;
+ unsigned long change, i, status;
status = gpio->read(gpio->client);
- spin_lock_irqsave(&gpio->slock, flags);
-
/*
* call the interrupt handler iff gpio is used as
* interrupt source, just to avoid bad irqs
*/
+ mutex_lock(&gpio->lock);
+ change = (gpio->status ^ status) & gpio->irq_enabled;
+ gpio->status = status;
+ mutex_unlock(&gpio->lock);
- change = (gpio->status ^ status);
for_each_set_bit(i, &change, gpio->chip.ngpio)
handle_nested_irq(irq_find_mapping(gpio->chip.irqdomain, i));
- gpio->status = status;
-
- spin_unlock_irqrestore(&gpio->slock, flags);
return IRQ_HANDLED;
}
@@ -209,29 +208,62 @@ static irqreturn_t pcf857x_irq(int irq, void *data)
*/
static void noop(struct irq_data *data) { }
-static unsigned int noop_ret(struct irq_data *data)
+static int pcf857x_irq_set_wake(struct irq_data *data, unsigned int on)
{
- return 0;
+ struct pcf857x *gpio = irq_data_get_irq_chip_data(data);
+
+ int error = 0;
+
+ if (gpio->irq_parent) {
+ error = irq_set_irq_wake(gpio->irq_parent, on);
+ if (error) {
+ dev_dbg(&gpio->client->dev,
+ "irq %u doesn't support irq_set_wake\n",
+ gpio->irq_parent);
+ gpio->irq_parent = 0;
+ }
+ }
+ return error;
}
-static int pcf857x_irq_set_wake(struct irq_data *data, unsigned int on)
+static void pcf857x_irq_enable(struct irq_data *data)
{
struct pcf857x *gpio = irq_data_get_irq_chip_data(data);
- irq_set_irq_wake(gpio->client->irq, on);
- return 0;
+ gpio->irq_enabled |= (1 << data->hwirq);
+}
+
+static void pcf857x_irq_disable(struct irq_data *data)
+{
+ struct pcf857x *gpio = irq_data_get_irq_chip_data(data);
+
+ gpio->irq_enabled &= ~(1 << data->hwirq);
+}
+
+static void pcf857x_irq_bus_lock(struct irq_data *data)
+{
+ struct pcf857x *gpio = irq_data_get_irq_chip_data(data);
+
+ mutex_lock(&gpio->lock);
+}
+
+static void pcf857x_irq_bus_sync_unlock(struct irq_data *data)
+{
+ struct pcf857x *gpio = irq_data_get_irq_chip_data(data);
+
+ mutex_unlock(&gpio->lock);
}
static struct irq_chip pcf857x_irq_chip = {
.name = "pcf857x",
- .irq_startup = noop_ret,
- .irq_shutdown = noop,
- .irq_enable = noop,
- .irq_disable = noop,
+ .irq_enable = pcf857x_irq_enable,
+ .irq_disable = pcf857x_irq_disable,
.irq_ack = noop,
.irq_mask = noop,
.irq_unmask = noop,
.irq_set_wake = pcf857x_irq_set_wake,
+ .irq_bus_lock = pcf857x_irq_bus_lock,
+ .irq_bus_sync_unlock = pcf857x_irq_bus_sync_unlock,
};
/*-------------------------------------------------------------------------*/
@@ -258,7 +290,6 @@ static int pcf857x_probe(struct i2c_client *client,
return -ENOMEM;
mutex_init(&gpio->lock);
- spin_lock_init(&gpio->slock);
gpio->chip.base = pdata ? pdata->gpio_base : -1;
gpio->chip.can_sleep = true;
@@ -364,6 +395,7 @@ static int pcf857x_probe(struct i2c_client *client,
gpiochip_set_chained_irqchip(&gpio->chip, &pcf857x_irq_chip,
client->irq, NULL);
+ gpio->irq_parent = client->irq;
}
/* Let platform code set up the GPIOs and their users.
diff --git a/kernel/drivers/gpio/gpio-pch.c b/kernel/drivers/gpio/gpio-pch.c
index 2d9a950ca..34ed176df 100644
--- a/kernel/drivers/gpio/gpio-pch.c
+++ b/kernel/drivers/gpio/gpio-pch.c
@@ -281,9 +281,9 @@ static int pch_irq_type(struct irq_data *d, unsigned int type)
/* And the handler */
if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
- __irq_set_handler_locked(d->irq, handle_level_irq);
+ irq_set_handler_locked(d, handle_level_irq);
else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
- __irq_set_handler_locked(d->irq, handle_edge_irq);
+ irq_set_handler_locked(d, handle_edge_irq);
unlock:
spin_unlock_irqrestore(&chip->spinlock, flags);
diff --git a/kernel/drivers/gpio/gpio-pl061.c b/kernel/drivers/gpio/gpio-pl061.c
index 047561304..4d4b37676 100644
--- a/kernel/drivers/gpio/gpio-pl061.c
+++ b/kernel/drivers/gpio/gpio-pl061.c
@@ -52,36 +52,12 @@ struct pl061_gpio {
void __iomem *base;
struct gpio_chip gc;
- bool uses_pinctrl;
#ifdef CONFIG_PM
struct pl061_context_save_regs csave_regs;
#endif
};
-static int pl061_gpio_request(struct gpio_chip *gc, unsigned offset)
-{
- /*
- * Map back to global GPIO space and request muxing, the direction
- * parameter does not matter for this controller.
- */
- struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
- int gpio = gc->base + offset;
-
- if (chip->uses_pinctrl)
- return pinctrl_request_gpio(gpio);
- return 0;
-}
-
-static void pl061_gpio_free(struct gpio_chip *gc, unsigned offset)
-{
- struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
- int gpio = gc->base + offset;
-
- if (chip->uses_pinctrl)
- pinctrl_free_gpio(gpio);
-}
-
static int pl061_direction_input(struct gpio_chip *gc, unsigned offset)
{
struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
@@ -152,6 +128,17 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
if (offset < 0 || offset >= PL061_GPIO_NR)
return -EINVAL;
+ if ((trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) &&
+ (trigger & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)))
+ {
+ dev_err(gc->dev,
+ "trying to configure line %d for both level and edge "
+ "detection, choose one!\n",
+ offset);
+ return -EINVAL;
+ }
+
+
spin_lock_irqsave(&chip->lock, flags);
gpioiev = readb(chip->base + GPIOIEV);
@@ -159,23 +146,53 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
gpioibe = readb(chip->base + GPIOIBE);
if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
+ bool polarity = trigger & IRQ_TYPE_LEVEL_HIGH;
+
+ /* Disable edge detection */
+ gpioibe &= ~bit;
+ /* Enable level detection */
gpiois |= bit;
- if (trigger & IRQ_TYPE_LEVEL_HIGH)
+ /* Select polarity */
+ if (polarity)
gpioiev |= bit;
else
gpioiev &= ~bit;
- } else
+ irq_set_handler_locked(d, handle_level_irq);
+ dev_dbg(gc->dev, "line %d: IRQ on %s level\n",
+ offset,
+ polarity ? "HIGH" : "LOW");
+ } else if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
+ /* Disable level detection */
gpiois &= ~bit;
-
- if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
- /* Setting this makes GPIOEV be ignored */
+ /* Select both edges, setting this makes GPIOEV be ignored */
gpioibe |= bit;
- else {
+ irq_set_handler_locked(d, handle_edge_irq);
+ dev_dbg(gc->dev, "line %d: IRQ on both edges\n", offset);
+ } else if ((trigger & IRQ_TYPE_EDGE_RISING) ||
+ (trigger & IRQ_TYPE_EDGE_FALLING)) {
+ bool rising = trigger & IRQ_TYPE_EDGE_RISING;
+
+ /* Disable level detection */
+ gpiois &= ~bit;
+ /* Clear detection on both edges */
gpioibe &= ~bit;
- if (trigger & IRQ_TYPE_EDGE_RISING)
+ /* Select edge */
+ if (rising)
gpioiev |= bit;
- else if (trigger & IRQ_TYPE_EDGE_FALLING)
+ else
gpioiev &= ~bit;
+ irq_set_handler_locked(d, handle_edge_irq);
+ dev_dbg(gc->dev, "line %d: IRQ on %s edge\n",
+ offset,
+ rising ? "RISING" : "FALLING");
+ } else {
+ /* No trigger: disable everything */
+ gpiois &= ~bit;
+ gpioibe &= ~bit;
+ gpioiev &= ~bit;
+ irq_set_handler_locked(d, handle_bad_irq);
+ dev_warn(gc->dev, "no trigger selected for line %d\n",
+ offset);
}
writeb(gpiois, chip->base + GPIOIS);
@@ -187,7 +204,7 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
return 0;
}
-static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
+static void pl061_irq_handler(struct irq_desc *desc)
{
unsigned long pending;
int offset;
@@ -198,7 +215,6 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
chained_irq_enter(irqchip, desc);
pending = readb(chip->base + GPIOMIS);
- writeb(pending, chip->base + GPIOIC);
if (pending) {
for_each_set_bit(offset, &pending, PL061_GPIO_NR)
generic_handle_irq(irq_find_mapping(gc->irqdomain,
@@ -234,8 +250,28 @@ static void pl061_irq_unmask(struct irq_data *d)
spin_unlock(&chip->lock);
}
+/**
+ * pl061_irq_ack() - ACK an edge IRQ
+ * @d: IRQ data for this IRQ
+ *
+ * This gets called from the edge IRQ handler to ACK the edge IRQ
+ * in the GPIOIC (interrupt-clear) register. For level IRQs this is
+ * not needed: these go away when the level signal goes away.
+ */
+static void pl061_irq_ack(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
+ u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
+
+ spin_lock(&chip->lock);
+ writeb(mask, chip->base + GPIOIC);
+ spin_unlock(&chip->lock);
+}
+
static struct irq_chip pl061_irqchip = {
.name = "pl061",
+ .irq_ack = pl061_irq_ack,
.irq_mask = pl061_irq_mask,
.irq_unmask = pl061_irq_unmask,
.irq_set_type = pl061_irq_type,
@@ -269,11 +305,11 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
return PTR_ERR(chip->base);
spin_lock_init(&chip->lock);
- if (of_property_read_bool(dev->of_node, "gpio-ranges"))
- chip->uses_pinctrl = true;
+ if (of_property_read_bool(dev->of_node, "gpio-ranges")) {
+ chip->gc.request = gpiochip_generic_request;
+ chip->gc.free = gpiochip_generic_free;
+ }
- chip->gc.request = pl061_gpio_request;
- chip->gc.free = pl061_gpio_free;
chip->gc.direction_input = pl061_direction_input;
chip->gc.direction_output = pl061_direction_output;
chip->gc.get = pl061_get_value;
@@ -298,7 +334,7 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
}
ret = gpiochip_irqchip_add(&chip->gc, &pl061_irqchip,
- irq_base, handle_simple_irq,
+ irq_base, handle_bad_irq,
IRQ_TYPE_NONE);
if (ret) {
dev_info(&adev->dev, "could not add irqchip\n");
diff --git a/kernel/drivers/gpio/gpio-pxa.c b/kernel/drivers/gpio/gpio-pxa.c
index cdbbcf0fa..df2ce550f 100644
--- a/kernel/drivers/gpio/gpio-pxa.c
+++ b/kernel/drivers/gpio/gpio-pxa.c
@@ -401,7 +401,7 @@ static int pxa_gpio_irq_type(struct irq_data *d, unsigned int type)
return 0;
}
-static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
+static void pxa_gpio_demux_handler(struct irq_desc *desc)
{
struct pxa_gpio_chip *c;
int loop, gpio, gpio_base, n;
@@ -524,7 +524,7 @@ static int pxa_irq_domain_map(struct irq_domain *d, unsigned int irq,
{
irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip,
handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ irq_set_noprobe(irq);
return 0;
}
@@ -643,20 +643,20 @@ static int pxa_gpio_probe(struct platform_device *pdev)
irq = gpio_to_irq(0);
irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip,
handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
}
if (irq1 > 0) {
irq = gpio_to_irq(1);
irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip,
handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
}
for (irq = gpio_to_irq(gpio_offset);
irq <= gpio_to_irq(pxa_last_gpio); irq++) {
irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip,
handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
}
}
diff --git a/kernel/drivers/gpio/gpio-rcar.c b/kernel/drivers/gpio/gpio-rcar.c
index 1e14a6c74..2a8122444 100644
--- a/kernel/drivers/gpio/gpio-rcar.c
+++ b/kernel/drivers/gpio/gpio-rcar.c
@@ -251,17 +251,32 @@ static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip,
static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset)
{
- return pinctrl_request_gpio(chip->base + offset);
+ struct gpio_rcar_priv *p = gpio_to_priv(chip);
+ int error;
+
+ error = pm_runtime_get_sync(&p->pdev->dev);
+ if (error < 0)
+ return error;
+
+ error = pinctrl_request_gpio(chip->base + offset);
+ if (error)
+ pm_runtime_put(&p->pdev->dev);
+
+ return error;
}
static void gpio_rcar_free(struct gpio_chip *chip, unsigned offset)
{
+ struct gpio_rcar_priv *p = gpio_to_priv(chip);
+
pinctrl_free_gpio(chip->base + offset);
/* Set the GPIO as an input to ensure that the next GPIO request won't
* drive the GPIO pin as an output.
*/
gpio_rcar_config_general_input_output_mode(chip, offset, false);
+
+ pm_runtime_put(&p->pdev->dev);
}
static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset)
@@ -327,6 +342,10 @@ static const struct of_device_id gpio_rcar_of_table[] = {
.compatible = "renesas,gpio-r8a7794",
.data = &gpio_rcar_info_gen2,
}, {
+ .compatible = "renesas,gpio-r8a7795",
+ /* Gen3 GPIO is identical to Gen2. */
+ .data = &gpio_rcar_info_gen2,
+ }, {
.compatible = "renesas,gpio-rcar",
.data = &gpio_rcar_info_gen1,
}, {
@@ -405,7 +424,6 @@ static int gpio_rcar_probe(struct platform_device *pdev)
}
pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -487,7 +505,6 @@ static int gpio_rcar_probe(struct platform_device *pdev)
err1:
gpiochip_remove(gpio_chip);
err0:
- pm_runtime_put(dev);
pm_runtime_disable(dev);
return ret;
}
@@ -498,7 +515,6 @@ static int gpio_rcar_remove(struct platform_device *pdev)
gpiochip_remove(&p->gpio_chip);
- pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
diff --git a/kernel/drivers/gpio/gpio-sa1100.c b/kernel/drivers/gpio/gpio-sa1100.c
index bec397a60..990fa9023 100644
--- a/kernel/drivers/gpio/gpio-sa1100.c
+++ b/kernel/drivers/gpio/gpio-sa1100.c
@@ -155,12 +155,12 @@ static int sa1100_gpio_irqdomain_map(struct irq_domain *d,
{
irq_set_chip_and_handler(irq, &sa1100_gpio_irq_chip,
handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ irq_set_noprobe(irq);
return 0;
}
-static struct irq_domain_ops sa1100_gpio_irqdomain_ops = {
+static const struct irq_domain_ops sa1100_gpio_irqdomain_ops = {
.map = sa1100_gpio_irqdomain_map,
.xlate = irq_domain_xlate_onetwocell,
};
@@ -172,10 +172,9 @@ static struct irq_domain *sa1100_gpio_irqdomain;
* irq_controller_lock held, and IRQs disabled. Decode the IRQ
* and call the handler.
*/
-static void
-sa1100_gpio_handler(unsigned int irq, struct irq_desc *desc)
+static void sa1100_gpio_handler(struct irq_desc *desc)
{
- unsigned int mask;
+ unsigned int irq, mask;
mask = GEDR;
do {
diff --git a/kernel/drivers/gpio/gpio-sodaville.c b/kernel/drivers/gpio/gpio-sodaville.c
index d8da36cd8..34b02b42a 100644
--- a/kernel/drivers/gpio/gpio-sodaville.c
+++ b/kernel/drivers/gpio/gpio-sodaville.c
@@ -102,7 +102,7 @@ static int sdv_xlate(struct irq_domain *h, struct device_node *node,
{
u32 line, type;
- if (node != h->of_node)
+ if (node != irq_domain_get_of_node(h))
return -EINVAL;
if (intsize < 2)
@@ -125,7 +125,7 @@ static int sdv_xlate(struct irq_domain *h, struct device_node *node,
return 0;
}
-static struct irq_domain_ops irq_domain_sdv_ops = {
+static const struct irq_domain_ops irq_domain_sdv_ops = {
.xlate = sdv_xlate,
};
diff --git a/kernel/drivers/gpio/gpio-sta2x11.c b/kernel/drivers/gpio/gpio-sta2x11.c
index 18579ac65..55e47828d 100644
--- a/kernel/drivers/gpio/gpio-sta2x11.c
+++ b/kernel/drivers/gpio/gpio-sta2x11.c
@@ -346,7 +346,7 @@ static void gsta_alloc_irq_chip(struct gsta_gpio *chip)
i = chip->irq_base + j;
irq_set_chip_and_handler(i, &ct->chip, ct->handler);
irq_set_chip_data(i, gc);
- irq_modify_status(i, IRQ_NOREQUEST | IRQ_NOPROBE, 0);
+ irq_clear_status_flags(i, IRQ_NOREQUEST | IRQ_NOPROBE);
}
gc->irq_cnt = i - gc->irq_base;
}
diff --git a/kernel/drivers/gpio/gpio-stp-xway.c b/kernel/drivers/gpio/gpio-stp-xway.c
index 202361eb7..81bdbe7ba 100644
--- a/kernel/drivers/gpio/gpio-stp-xway.c
+++ b/kernel/drivers/gpio/gpio-stp-xway.c
@@ -58,7 +58,7 @@
#define XWAY_STP_ADSL_MASK 0x3
/* 2 groups of 3 bits can be driven by the phys */
-#define XWAY_STP_PHY_MASK 0x3
+#define XWAY_STP_PHY_MASK 0x7
#define XWAY_STP_PHY1_SHIFT 27
#define XWAY_STP_PHY2_SHIFT 15
@@ -200,7 +200,7 @@ static int xway_stp_hw_init(struct xway_stp *chip)
static int xway_stp_probe(struct platform_device *pdev)
{
struct resource *res;
- const __be32 *shadow, *groups, *dsl, *phy;
+ u32 shadow, groups, dsl, phy;
struct xway_stp *chip;
struct clk *clk;
int ret = 0;
@@ -223,33 +223,28 @@ static int xway_stp_probe(struct platform_device *pdev)
chip->gc.owner = THIS_MODULE;
/* store the shadow value if one was passed by the devicetree */
- shadow = of_get_property(pdev->dev.of_node, "lantiq,shadow", NULL);
- if (shadow)
- chip->shadow = be32_to_cpu(*shadow);
+ if (!of_property_read_u32(pdev->dev.of_node, "lantiq,shadow", &shadow))
+ chip->shadow = shadow;
/* find out which gpio groups should be enabled */
- groups = of_get_property(pdev->dev.of_node, "lantiq,groups", NULL);
- if (groups)
- chip->groups = be32_to_cpu(*groups) & XWAY_STP_GROUP_MASK;
+ if (!of_property_read_u32(pdev->dev.of_node, "lantiq,groups", &groups))
+ chip->groups = groups & XWAY_STP_GROUP_MASK;
else
chip->groups = XWAY_STP_GROUP0;
chip->gc.ngpio = fls(chip->groups) * 8;
/* find out which gpios are controlled by the dsl core */
- dsl = of_get_property(pdev->dev.of_node, "lantiq,dsl", NULL);
- if (dsl)
- chip->dsl = be32_to_cpu(*dsl) & XWAY_STP_ADSL_MASK;
+ if (!of_property_read_u32(pdev->dev.of_node, "lantiq,dsl", &dsl))
+ chip->dsl = dsl & XWAY_STP_ADSL_MASK;
/* find out which gpios are controlled by the phys */
if (of_machine_is_compatible("lantiq,ar9") ||
of_machine_is_compatible("lantiq,gr9") ||
of_machine_is_compatible("lantiq,vr9")) {
- phy = of_get_property(pdev->dev.of_node, "lantiq,phy1", NULL);
- if (phy)
- chip->phy1 = be32_to_cpu(*phy) & XWAY_STP_PHY_MASK;
- phy = of_get_property(pdev->dev.of_node, "lantiq,phy2", NULL);
- if (phy)
- chip->phy2 = be32_to_cpu(*phy) & XWAY_STP_PHY_MASK;
+ if (!of_property_read_u32(pdev->dev.of_node, "lantiq,phy1", &phy))
+ chip->phy1 = phy & XWAY_STP_PHY_MASK;
+ if (!of_property_read_u32(pdev->dev.of_node, "lantiq,phy2", &phy))
+ chip->phy2 = phy & XWAY_STP_PHY_MASK;
}
/* check which edge trigger we should use, default to a falling edge */
diff --git a/kernel/drivers/gpio/gpio-sx150x.c b/kernel/drivers/gpio/gpio-sx150x.c
index 458d9d795..76f920173 100644
--- a/kernel/drivers/gpio/gpio-sx150x.c
+++ b/kernel/drivers/gpio/gpio-sx150x.c
@@ -160,6 +160,11 @@ static const struct of_device_id sx150x_of_match[] = {
};
MODULE_DEVICE_TABLE(of, sx150x_of_match);
+struct sx150x_chip *to_sx150x(struct gpio_chip *gc)
+{
+ return container_of(gc, struct sx150x_chip, gpio_chip);
+}
+
static s32 sx150x_i2c_write(struct i2c_client *client, u8 reg, u8 val)
{
s32 err = i2c_smbus_write_byte_data(client, reg, val);
@@ -296,11 +301,9 @@ static int sx150x_io_output(struct sx150x_chip *chip, unsigned offset, int val)
static int sx150x_gpio_get(struct gpio_chip *gc, unsigned offset)
{
- struct sx150x_chip *chip;
+ struct sx150x_chip *chip = to_sx150x(gc);
int status = -EINVAL;
- chip = container_of(gc, struct sx150x_chip, gpio_chip);
-
if (!offset_is_oscio(chip, offset)) {
mutex_lock(&chip->lock);
status = sx150x_get_io(chip, offset);
@@ -312,9 +315,7 @@ static int sx150x_gpio_get(struct gpio_chip *gc, unsigned offset)
static void sx150x_gpio_set(struct gpio_chip *gc, unsigned offset, int val)
{
- struct sx150x_chip *chip;
-
- chip = container_of(gc, struct sx150x_chip, gpio_chip);
+ struct sx150x_chip *chip = to_sx150x(gc);
mutex_lock(&chip->lock);
if (offset_is_oscio(chip, offset))
@@ -326,11 +327,9 @@ static void sx150x_gpio_set(struct gpio_chip *gc, unsigned offset, int val)
static int sx150x_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
- struct sx150x_chip *chip;
+ struct sx150x_chip *chip = to_sx150x(gc);
int status = -EINVAL;
- chip = container_of(gc, struct sx150x_chip, gpio_chip);
-
if (!offset_is_oscio(chip, offset)) {
mutex_lock(&chip->lock);
status = sx150x_io_input(chip, offset);
@@ -343,11 +342,9 @@ static int sx150x_gpio_direction_output(struct gpio_chip *gc,
unsigned offset,
int val)
{
- struct sx150x_chip *chip;
+ struct sx150x_chip *chip = to_sx150x(gc);
int status = 0;
- chip = container_of(gc, struct sx150x_chip, gpio_chip);
-
if (!offset_is_oscio(chip, offset)) {
mutex_lock(&chip->lock);
status = sx150x_io_output(chip, offset, val);
@@ -358,7 +355,7 @@ static int sx150x_gpio_direction_output(struct gpio_chip *gc,
static void sx150x_irq_mask(struct irq_data *d)
{
- struct sx150x_chip *chip = irq_data_get_irq_chip_data(d);
+ struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d));
unsigned n = d->hwirq;
chip->irq_masked |= (1 << n);
@@ -367,7 +364,7 @@ static void sx150x_irq_mask(struct irq_data *d)
static void sx150x_irq_unmask(struct irq_data *d)
{
- struct sx150x_chip *chip = irq_data_get_irq_chip_data(d);
+ struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d));
unsigned n = d->hwirq;
chip->irq_masked &= ~(1 << n);
@@ -376,7 +373,7 @@ static void sx150x_irq_unmask(struct irq_data *d)
static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type)
{
- struct sx150x_chip *chip = irq_data_get_irq_chip_data(d);
+ struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d));
unsigned n, val = 0;
if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
@@ -431,14 +428,14 @@ static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id)
static void sx150x_irq_bus_lock(struct irq_data *d)
{
- struct sx150x_chip *chip = irq_data_get_irq_chip_data(d);
+ struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d));
mutex_lock(&chip->lock);
}
static void sx150x_irq_bus_sync_unlock(struct irq_data *d)
{
- struct sx150x_chip *chip = irq_data_get_irq_chip_data(d);
+ struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d));
unsigned n;
if (chip->irq_update == NO_UPDATE_PENDING)
@@ -706,4 +703,3 @@ module_exit(sx150x_exit);
MODULE_AUTHOR("Gregory Bean <gbean@codeaurora.org>");
MODULE_DESCRIPTION("Driver for Semtech SX150X I2C GPIO Expanders");
MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("i2c:sx150x");
diff --git a/kernel/drivers/gpio/gpio-syscon.c b/kernel/drivers/gpio/gpio-syscon.c
index 045a95257..7b25fdf64 100644
--- a/kernel/drivers/gpio/gpio-syscon.c
+++ b/kernel/drivers/gpio/gpio-syscon.c
@@ -187,11 +187,15 @@ MODULE_DEVICE_TABLE(of, syscon_gpio_ids);
static int syscon_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- const struct of_device_id *of_id = of_match_device(syscon_gpio_ids, dev);
+ const struct of_device_id *of_id;
struct syscon_gpio_priv *priv;
struct device_node *np = dev->of_node;
int ret;
+ of_id = of_match_device(syscon_gpio_ids, dev);
+ if (!of_id)
+ return -ENODEV;
+
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
diff --git a/kernel/drivers/gpio/gpio-tb10x.c b/kernel/drivers/gpio/gpio-tb10x.c
index 46b89614a..4356e6c20 100644
--- a/kernel/drivers/gpio/gpio-tb10x.c
+++ b/kernel/drivers/gpio/gpio-tb10x.c
@@ -138,16 +138,6 @@ static int tb10x_gpio_direction_out(struct gpio_chip *chip,
return 0;
}
-static int tb10x_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
- return pinctrl_request_gpio(chip->base + offset);
-}
-
-static void tb10x_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- pinctrl_free_gpio(chip->base + offset);
-}
-
static int tb10x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip);
@@ -213,8 +203,8 @@ static int tb10x_gpio_probe(struct platform_device *pdev)
tb10x_gpio->gc.get = tb10x_gpio_get;
tb10x_gpio->gc.direction_output = tb10x_gpio_direction_out;
tb10x_gpio->gc.set = tb10x_gpio_set;
- tb10x_gpio->gc.request = tb10x_gpio_request;
- tb10x_gpio->gc.free = tb10x_gpio_free;
+ tb10x_gpio->gc.request = gpiochip_generic_request;
+ tb10x_gpio->gc.free = gpiochip_generic_free;
tb10x_gpio->gc.base = -1;
tb10x_gpio->gc.ngpio = ngpio;
tb10x_gpio->gc.can_sleep = false;
@@ -292,7 +282,6 @@ static int tb10x_gpio_remove(struct platform_device *pdev)
BIT(tb10x_gpio->gc.ngpio) - 1, 0, 0);
kfree(tb10x_gpio->domain->gc);
irq_domain_remove(tb10x_gpio->domain);
- free_irq(tb10x_gpio->irq, tb10x_gpio);
}
gpiochip_remove(&tb10x_gpio->gc);
diff --git a/kernel/drivers/gpio/gpio-tc3589x.c b/kernel/drivers/gpio/gpio-tc3589x.c
index 31b244cff..d1d585ddb 100644
--- a/kernel/drivers/gpio/gpio-tc3589x.c
+++ b/kernel/drivers/gpio/gpio-tc3589x.c
@@ -102,7 +102,7 @@ static struct gpio_chip template_chip = {
static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip);
+ struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(gc);
int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -130,7 +130,7 @@ static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type)
static void tc3589x_gpio_irq_lock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip);
+ struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(gc);
mutex_lock(&tc3589x_gpio->irq_lock);
}
@@ -138,7 +138,7 @@ static void tc3589x_gpio_irq_lock(struct irq_data *d)
static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip);
+ struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(gc);
struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
static const u8 regmap[] = {
[REG_IBE] = TC3589x_GPIOIBE0,
@@ -167,7 +167,7 @@ static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d)
static void tc3589x_gpio_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip);
+ struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(gc);
int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -178,7 +178,7 @@ static void tc3589x_gpio_irq_mask(struct irq_data *d)
static void tc3589x_gpio_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip);
+ struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(gc);
int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
diff --git a/kernel/drivers/gpio/gpio-tegra.c b/kernel/drivers/gpio/gpio-tegra.c
index 1741981d5..896bf2977 100644
--- a/kernel/drivers/gpio/gpio-tegra.c
+++ b/kernel/drivers/gpio/gpio-tegra.c
@@ -252,9 +252,9 @@ static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
tegra_gpio_enable(gpio);
if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
- __irq_set_handler_locked(d->irq, handle_level_irq);
+ irq_set_handler_locked(d, handle_level_irq);
else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
- __irq_set_handler_locked(d->irq, handle_edge_irq);
+ irq_set_handler_locked(d, handle_edge_irq);
return 0;
}
@@ -266,18 +266,16 @@ static void tegra_gpio_irq_shutdown(struct irq_data *d)
gpiochip_unlock_as_irq(&tegra_gpio_chip, gpio);
}
-static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void tegra_gpio_irq_handler(struct irq_desc *desc)
{
- struct tegra_gpio_bank *bank;
int port;
int pin;
int unmasked = 0;
struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct tegra_gpio_bank *bank = irq_desc_get_handler_data(desc);
chained_irq_enter(chip, desc);
- bank = irq_get_handler_data(irq);
-
for (port = 0; port < 4; port++) {
int gpio = tegra_gpio_compose(bank->bank, port, 0);
unsigned long sta = tegra_gpio_readl(GPIO_INT_STA(gpio)) &
@@ -288,7 +286,7 @@ static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
tegra_gpio_writel(1 << pin, GPIO_INT_CLR(gpio));
/* if gpio is edge triggered, clear condition
- * before executing the hander so that we don't
+ * before executing the handler so that we don't
* miss edges
*/
if (lvl & (0x100 << pin)) {
@@ -377,6 +375,60 @@ static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
}
#endif
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static int dbg_gpio_show(struct seq_file *s, void *unused)
+{
+ int i;
+ int j;
+
+ for (i = 0; i < tegra_gpio_bank_count; i++) {
+ for (j = 0; j < 4; j++) {
+ int gpio = tegra_gpio_compose(i, j, 0);
+ seq_printf(s,
+ "%d:%d %02x %02x %02x %02x %02x %02x %06x\n",
+ i, j,
+ tegra_gpio_readl(GPIO_CNF(gpio)),
+ tegra_gpio_readl(GPIO_OE(gpio)),
+ tegra_gpio_readl(GPIO_OUT(gpio)),
+ tegra_gpio_readl(GPIO_IN(gpio)),
+ tegra_gpio_readl(GPIO_INT_STA(gpio)),
+ tegra_gpio_readl(GPIO_INT_ENB(gpio)),
+ tegra_gpio_readl(GPIO_INT_LVL(gpio)));
+ }
+ }
+ return 0;
+}
+
+static int dbg_gpio_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dbg_gpio_show, &inode->i_private);
+}
+
+static const struct file_operations debug_fops = {
+ .open = dbg_gpio_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void tegra_gpio_debuginit(void)
+{
+ (void) debugfs_create_file("tegra_gpio", S_IRUGO,
+ NULL, NULL, &debug_fops);
+}
+
+#else
+
+static inline void tegra_gpio_debuginit(void)
+{
+}
+
+#endif
+
static struct irq_chip tegra_gpio_irq_chip = {
.name = "GPIO",
.irq_ack = tegra_gpio_irq_ack,
@@ -509,19 +561,20 @@ static int tegra_gpio_probe(struct platform_device *pdev)
irq_set_chip_data(irq, bank);
irq_set_chip_and_handler(irq, &tegra_gpio_irq_chip,
handle_simple_irq);
- set_irq_flags(irq, IRQF_VALID);
}
for (i = 0; i < tegra_gpio_bank_count; i++) {
bank = &tegra_gpio_banks[i];
- irq_set_chained_handler(bank->irq, tegra_gpio_irq_handler);
- irq_set_handler_data(bank->irq, bank);
+ irq_set_chained_handler_and_data(bank->irq,
+ tegra_gpio_irq_handler, bank);
for (j = 0; j < 4; j++)
spin_lock_init(&bank->lvl_lock[j]);
}
+ tegra_gpio_debuginit();
+
return 0;
}
@@ -539,52 +592,3 @@ static int __init tegra_gpio_init(void)
return platform_driver_register(&tegra_gpio_driver);
}
postcore_initcall(tegra_gpio_init);
-
-#ifdef CONFIG_DEBUG_FS
-
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-static int dbg_gpio_show(struct seq_file *s, void *unused)
-{
- int i;
- int j;
-
- for (i = 0; i < tegra_gpio_bank_count; i++) {
- for (j = 0; j < 4; j++) {
- int gpio = tegra_gpio_compose(i, j, 0);
- seq_printf(s,
- "%d:%d %02x %02x %02x %02x %02x %02x %06x\n",
- i, j,
- tegra_gpio_readl(GPIO_CNF(gpio)),
- tegra_gpio_readl(GPIO_OE(gpio)),
- tegra_gpio_readl(GPIO_OUT(gpio)),
- tegra_gpio_readl(GPIO_IN(gpio)),
- tegra_gpio_readl(GPIO_INT_STA(gpio)),
- tegra_gpio_readl(GPIO_INT_ENB(gpio)),
- tegra_gpio_readl(GPIO_INT_LVL(gpio)));
- }
- }
- return 0;
-}
-
-static int dbg_gpio_open(struct inode *inode, struct file *file)
-{
- return single_open(file, dbg_gpio_show, &inode->i_private);
-}
-
-static const struct file_operations debug_fops = {
- .open = dbg_gpio_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int __init tegra_gpio_debuginit(void)
-{
- (void) debugfs_create_file("tegra_gpio", S_IRUGO,
- NULL, NULL, &debug_fops);
- return 0;
-}
-late_initcall(tegra_gpio_debuginit);
-#endif
diff --git a/kernel/drivers/gpio/gpio-timberdale.c b/kernel/drivers/gpio/gpio-timberdale.c
index e8f97e03c..30653e631 100644
--- a/kernel/drivers/gpio/gpio-timberdale.c
+++ b/kernel/drivers/gpio/gpio-timberdale.c
@@ -192,13 +192,14 @@ out:
return ret;
}
-static void timbgpio_irq(unsigned int irq, struct irq_desc *desc)
+static void timbgpio_irq(struct irq_desc *desc)
{
- struct timbgpio *tgpio = irq_get_handler_data(irq);
+ struct timbgpio *tgpio = irq_desc_get_handler_data(desc);
+ struct irq_data *data = irq_desc_get_irq_data(desc);
unsigned long ipr;
int offset;
- desc->irq_data.chip->irq_ack(irq_get_irq_data(irq));
+ data->chip->irq_ack(data);
ipr = ioread32(tgpio->membase + TGPIO_IPR);
iowrite32(ipr, tgpio->membase + TGPIO_ICR);
@@ -294,13 +295,10 @@ static int timbgpio_probe(struct platform_device *pdev)
irq_set_chip_and_handler(tgpio->irq_base + i,
&timbgpio_irqchip, handle_simple_irq);
irq_set_chip_data(tgpio->irq_base + i, tgpio);
-#ifdef CONFIG_ARM
- set_irq_flags(tgpio->irq_base + i, IRQF_VALID | IRQF_PROBE);
-#endif
+ irq_clear_status_flags(tgpio->irq_base + i, IRQ_NOREQUEST | IRQ_NOPROBE);
}
- irq_set_handler_data(irq, tgpio);
- irq_set_chained_handler(irq, timbgpio_irq);
+ irq_set_chained_handler_and_data(irq, timbgpio_irq, tgpio);
return 0;
}
diff --git a/kernel/drivers/gpio/gpio-ts5500.c b/kernel/drivers/gpio/gpio-ts5500.c
index 92fbabd82..b29a102d1 100644
--- a/kernel/drivers/gpio/gpio-ts5500.c
+++ b/kernel/drivers/gpio/gpio-ts5500.c
@@ -440,7 +440,7 @@ static int ts5500_dio_remove(struct platform_device *pdev)
return 0;
}
-static struct platform_device_id ts5500_dio_ids[] = {
+static const struct platform_device_id ts5500_dio_ids[] = {
{ "ts5500-dio1", TS5500_DIO1 },
{ "ts5500-dio2", TS5500_DIO2 },
{ "ts5500-dio-lcd", TS5500_LCD },
diff --git a/kernel/drivers/gpio/gpio-tz1090-pdc.c b/kernel/drivers/gpio/gpio-tz1090-pdc.c
index ede7e403f..3623d009d 100644
--- a/kernel/drivers/gpio/gpio-tz1090-pdc.c
+++ b/kernel/drivers/gpio/gpio-tz1090-pdc.c
@@ -137,16 +137,6 @@ static void tz1090_pdc_gpio_set(struct gpio_chip *chip, unsigned int offset,
__global_unlock2(lstat);
}
-static int tz1090_pdc_gpio_request(struct gpio_chip *chip, unsigned int offset)
-{
- return pinctrl_request_gpio(chip->base + offset);
-}
-
-static void tz1090_pdc_gpio_free(struct gpio_chip *chip, unsigned int offset)
-{
- pinctrl_free_gpio(chip->base + offset);
-}
-
static int tz1090_pdc_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
{
struct tz1090_pdc_gpio *priv = to_pdc(chip);
@@ -203,8 +193,8 @@ static int tz1090_pdc_gpio_probe(struct platform_device *pdev)
priv->chip.direction_output = tz1090_pdc_gpio_direction_output;
priv->chip.get = tz1090_pdc_gpio_get;
priv->chip.set = tz1090_pdc_gpio_set;
- priv->chip.free = tz1090_pdc_gpio_free;
- priv->chip.request = tz1090_pdc_gpio_request;
+ priv->chip.free = gpiochip_generic_free;
+ priv->chip.request = gpiochip_generic_request;
priv->chip.to_irq = tz1090_pdc_gpio_to_irq;
priv->chip.of_node = np;
diff --git a/kernel/drivers/gpio/gpio-tz1090.c b/kernel/drivers/gpio/gpio-tz1090.c
index 445660adc..87bb1b1ee 100644
--- a/kernel/drivers/gpio/gpio-tz1090.c
+++ b/kernel/drivers/gpio/gpio-tz1090.c
@@ -375,7 +375,7 @@ static int gpio_set_irq_wake(struct irq_data *data, unsigned int on)
#define gpio_set_irq_wake NULL
#endif
-static void tz1090_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void tz1090_gpio_irq_handler(struct irq_desc *desc)
{
irq_hw_number_t hw;
unsigned int irq_stat, irq_no;
@@ -400,7 +400,7 @@ static void tz1090_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
== IRQ_TYPE_EDGE_BOTH)
tz1090_gpio_irq_next_edge(bank, hw);
- generic_handle_irq_desc(irq_no, child_desc);
+ generic_handle_irq_desc(child_desc);
}
}
@@ -510,8 +510,8 @@ static int tz1090_gpio_bank_probe(struct tz1090_gpio_bank_info *info)
gc->chip_types[1].chip.flags = IRQCHIP_MASK_ON_SUSPEND;
/* Setup chained handler for this GPIO bank */
- irq_set_handler_data(bank->irq, bank);
- irq_set_chained_handler(bank->irq, tz1090_gpio_irq_handler);
+ irq_set_chained_handler_and_data(bank->irq, tz1090_gpio_irq_handler,
+ bank);
return 0;
}
diff --git a/kernel/drivers/gpio/gpio-vf610.c b/kernel/drivers/gpio/gpio-vf610.c
index 7bd9f209f..87b950cec 100644
--- a/kernel/drivers/gpio/gpio-vf610.c
+++ b/kernel/drivers/gpio/gpio-vf610.c
@@ -60,6 +60,13 @@ struct vf610_gpio_port {
#define PORT_INT_EITHER_EDGE 0xb
#define PORT_INT_LOGIC_ONE 0xc
+static struct irq_chip vf610_gpio_irq_chip;
+
+static struct vf610_gpio_port *to_vf610_gp(struct gpio_chip *gc)
+{
+ return container_of(gc, struct vf610_gpio_port, gc);
+}
+
static const struct of_device_id vf610_gpio_dt_ids[] = {
{ .compatible = "fsl,vf610-gpio" },
{ /* sentinel */ }
@@ -75,28 +82,16 @@ static inline u32 vf610_gpio_readl(void __iomem *reg)
return readl_relaxed(reg);
}
-static int vf610_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
- return pinctrl_request_gpio(chip->base + offset);
-}
-
-static void vf610_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- pinctrl_free_gpio(chip->base + offset);
-}
-
static int vf610_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
- struct vf610_gpio_port *port =
- container_of(gc, struct vf610_gpio_port, gc);
+ struct vf610_gpio_port *port = to_vf610_gp(gc);
return !!(vf610_gpio_readl(port->gpio_base + GPIO_PDIR) & BIT(gpio));
}
static void vf610_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
- struct vf610_gpio_port *port =
- container_of(gc, struct vf610_gpio_port, gc);
+ struct vf610_gpio_port *port = to_vf610_gp(gc);
unsigned long mask = BIT(gpio);
if (val)
@@ -118,9 +113,10 @@ static int vf610_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
return pinctrl_gpio_direction_output(chip->base + gpio);
}
-static void vf610_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+static void vf610_gpio_irq_handler(struct irq_desc *desc)
{
- struct vf610_gpio_port *port = irq_get_handler_data(irq);
+ struct vf610_gpio_port *port =
+ to_vf610_gp(irq_desc_get_handler_data(desc));
struct irq_chip *chip = irq_desc_get_chip(desc);
int pin;
unsigned long irq_isfr;
@@ -140,7 +136,8 @@ static void vf610_gpio_irq_handler(u32 irq, struct irq_desc *desc)
static void vf610_gpio_irq_ack(struct irq_data *d)
{
- struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d);
+ struct vf610_gpio_port *port =
+ to_vf610_gp(irq_data_get_irq_chip_data(d));
int gpio = d->hwirq;
vf610_gpio_writel(BIT(gpio), port->base + PORT_ISFR);
@@ -148,7 +145,8 @@ static void vf610_gpio_irq_ack(struct irq_data *d)
static int vf610_gpio_irq_set_type(struct irq_data *d, u32 type)
{
- struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d);
+ struct vf610_gpio_port *port =
+ to_vf610_gp(irq_data_get_irq_chip_data(d));
u8 irqc;
switch (type) {
@@ -173,12 +171,18 @@ static int vf610_gpio_irq_set_type(struct irq_data *d, u32 type)
port->irqc[d->hwirq] = irqc;
+ if (type & IRQ_TYPE_LEVEL_MASK)
+ irq_set_handler_locked(d, handle_level_irq);
+ else
+ irq_set_handler_locked(d, handle_edge_irq);
+
return 0;
}
static void vf610_gpio_irq_mask(struct irq_data *d)
{
- struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d);
+ struct vf610_gpio_port *port =
+ to_vf610_gp(irq_data_get_irq_chip_data(d));
void __iomem *pcr_base = port->base + PORT_PCR(d->hwirq);
vf610_gpio_writel(0, pcr_base);
@@ -186,7 +190,8 @@ static void vf610_gpio_irq_mask(struct irq_data *d)
static void vf610_gpio_irq_unmask(struct irq_data *d)
{
- struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d);
+ struct vf610_gpio_port *port =
+ to_vf610_gp(irq_data_get_irq_chip_data(d));
void __iomem *pcr_base = port->base + PORT_PCR(d->hwirq);
vf610_gpio_writel(port->irqc[d->hwirq] << PORT_PCR_IRQC_OFFSET,
@@ -195,7 +200,8 @@ static void vf610_gpio_irq_unmask(struct irq_data *d)
static int vf610_gpio_irq_set_wake(struct irq_data *d, u32 enable)
{
- struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d);
+ struct vf610_gpio_port *port =
+ to_vf610_gp(irq_data_get_irq_chip_data(d));
if (enable)
enable_irq_wake(port->irq);
@@ -248,8 +254,8 @@ static int vf610_gpio_probe(struct platform_device *pdev)
gc->ngpio = VF610_GPIO_PER_PORT;
gc->base = of_alias_get_id(np, "gpio") * VF610_GPIO_PER_PORT;
- gc->request = vf610_gpio_request;
- gc->free = vf610_gpio_free;
+ gc->request = gpiochip_generic_request;
+ gc->free = gpiochip_generic_free;
gc->direction_input = vf610_gpio_direction_input;
gc->get = vf610_gpio_get;
gc->direction_output = vf610_gpio_direction_output;
@@ -263,7 +269,7 @@ static int vf610_gpio_probe(struct platform_device *pdev)
vf610_gpio_writel(~0, port->base + PORT_ISFR);
ret = gpiochip_irqchip_add(gc, &vf610_gpio_irq_chip, 0,
- handle_simple_irq, IRQ_TYPE_NONE);
+ handle_edge_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(dev, "failed to add irqchip\n");
gpiochip_remove(gc);
diff --git a/kernel/drivers/gpio/gpio-xgene-sb.c b/kernel/drivers/gpio/gpio-xgene-sb.c
index fb9d29a5d..d57068b90 100644
--- a/kernel/drivers/gpio/gpio-xgene-sb.c
+++ b/kernel/drivers/gpio/gpio-xgene-sb.c
@@ -25,8 +25,11 @@
#include <linux/of_gpio.h>
#include <linux/gpio.h>
#include <linux/gpio/driver.h>
+#include <linux/acpi.h>
#include <linux/basic_mmio_gpio.h>
+#include "gpiolib.h"
+
#define XGENE_MAX_GPIO_DS 22
#define XGENE_MAX_GPIO_DS_IRQ 6
@@ -112,7 +115,6 @@ static int xgene_gpio_sb_probe(struct platform_device *pdev)
GFP_KERNEL);
if (!priv->irq)
return -ENOMEM;
- memset(priv->irq, 0, sizeof(u32) * XGENE_MAX_GPIO_DS);
for (i = 0; i < priv->nirq; i++) {
priv->irq[default_lines[i]] = platform_get_irq(pdev, i);
@@ -129,6 +131,11 @@ static int xgene_gpio_sb_probe(struct platform_device *pdev)
else
dev_info(&pdev->dev, "X-Gene GPIO Standby driver registered\n");
+ if (priv->nirq > 0) {
+ /* Register interrupt handlers for gpio signaled acpi events */
+ acpi_gpiochip_request_interrupts(&priv->bgc.gc);
+ }
+
return ret;
}
@@ -136,6 +143,10 @@ static int xgene_gpio_sb_remove(struct platform_device *pdev)
{
struct xgene_gpio_sb *priv = platform_get_drvdata(pdev);
+ if (priv->nirq > 0) {
+ acpi_gpiochip_free_interrupts(&priv->bgc.gc);
+ }
+
return bgpio_remove(&priv->bgc);
}
@@ -145,10 +156,19 @@ static const struct of_device_id xgene_gpio_sb_of_match[] = {
};
MODULE_DEVICE_TABLE(of, xgene_gpio_sb_of_match);
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_gpio_sb_acpi_match[] = {
+ {"APMC0D15", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, xgene_gpio_sb_acpi_match);
+#endif
+
static struct platform_driver xgene_gpio_sb_driver = {
.driver = {
.name = "xgene-gpio-sb",
.of_match_table = xgene_gpio_sb_of_match,
+ .acpi_match_table = ACPI_PTR(xgene_gpio_sb_acpi_match),
},
.probe = xgene_gpio_sb_probe,
.remove = xgene_gpio_sb_remove,
diff --git a/kernel/drivers/gpio/gpio-xilinx.c b/kernel/drivers/gpio/gpio-xilinx.c
index 61243d177..d5284dfe0 100644
--- a/kernel/drivers/gpio/gpio-xilinx.c
+++ b/kernel/drivers/gpio/gpio-xilinx.c
@@ -41,10 +41,10 @@
/**
* struct xgpio_instance - Stores information about GPIO device
* @mmchip: OF GPIO chip for memory mapped banks
+ * @gpio_width: GPIO width for every channel
* @gpio_state: GPIO state shadow register
* @gpio_dir: GPIO direction shadow register
* @gpio_lock: Lock used for synchronization
- * @inited: True if the port has been inited
*/
struct xgpio_instance {
struct of_mm_gpio_chip mmchip;
@@ -220,9 +220,9 @@ static void xgpio_save_regs(struct of_mm_gpio_chip *mm_gc)
if (!chip->gpio_width[1])
return;
- xgpio_writereg(mm_gc->regs + XGPIO_DATA_OFFSET + XGPIO_TRI_OFFSET,
+ xgpio_writereg(mm_gc->regs + XGPIO_DATA_OFFSET + XGPIO_CHANNEL_OFFSET,
chip->gpio_state[1]);
- xgpio_writereg(mm_gc->regs + XGPIO_TRI_OFFSET + XGPIO_TRI_OFFSET,
+ xgpio_writereg(mm_gc->regs + XGPIO_TRI_OFFSET + XGPIO_CHANNEL_OFFSET,
chip->gpio_dir[1]);
}
@@ -231,6 +231,8 @@ static void xgpio_save_regs(struct of_mm_gpio_chip *mm_gc)
* @pdev: pointer to the platform device
*
* This function remove gpiochips and frees all the allocated resources.
+ *
+ * Return: 0 always
*/
static int xgpio_remove(struct platform_device *pdev)
{
diff --git a/kernel/drivers/gpio/gpio-xlp.c b/kernel/drivers/gpio/gpio-xlp.c
new file mode 100644
index 000000000..bc06a2cd2
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-xlp.c
@@ -0,0 +1,428 @@
+/*
+ * Copyright (C) 2003-2015 Broadcom Corporation
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
+
+/*
+ * XLP GPIO has multiple 32 bit registers for each feature where each register
+ * controls 32 pins. So, pins up to 64 require 2 32-bit registers and up to 96
+ * require 3 32-bit registers for each feature.
+ * Here we only define offset of the first register for each feature. Offset of
+ * the registers for pins greater than 32 can be calculated as following(Use
+ * GPIO_INT_STAT as example):
+ *
+ * offset = (gpio / XLP_GPIO_REGSZ) * 4;
+ * reg_addr = addr + offset;
+ *
+ * where addr is base address of the that feature register and gpio is the pin.
+ */
+#define GPIO_OUTPUT_EN 0x00
+#define GPIO_PADDRV 0x08
+#define GPIO_INT_EN00 0x18
+#define GPIO_INT_EN10 0x20
+#define GPIO_INT_EN20 0x28
+#define GPIO_INT_EN30 0x30
+#define GPIO_INT_POL 0x38
+#define GPIO_INT_TYPE 0x40
+#define GPIO_INT_STAT 0x48
+
+#define GPIO_9XX_BYTESWAP 0X00
+#define GPIO_9XX_CTRL 0X04
+#define GPIO_9XX_OUTPUT_EN 0x14
+#define GPIO_9XX_PADDRV 0x24
+/*
+ * Only for 4 interrupt enable reg are defined for now,
+ * total reg available are 12.
+ */
+#define GPIO_9XX_INT_EN00 0x44
+#define GPIO_9XX_INT_EN10 0x54
+#define GPIO_9XX_INT_EN20 0x64
+#define GPIO_9XX_INT_EN30 0x74
+#define GPIO_9XX_INT_POL 0x104
+#define GPIO_9XX_INT_TYPE 0x114
+#define GPIO_9XX_INT_STAT 0x124
+
+#define GPIO_3XX_INT_EN00 0x18
+#define GPIO_3XX_INT_EN10 0x20
+#define GPIO_3XX_INT_EN20 0x28
+#define GPIO_3XX_INT_EN30 0x30
+#define GPIO_3XX_INT_POL 0x78
+#define GPIO_3XX_INT_TYPE 0x80
+#define GPIO_3XX_INT_STAT 0x88
+
+/* Interrupt type register mask */
+#define XLP_GPIO_IRQ_TYPE_LVL 0x0
+#define XLP_GPIO_IRQ_TYPE_EDGE 0x1
+
+/* Interrupt polarity register mask */
+#define XLP_GPIO_IRQ_POL_HIGH 0x0
+#define XLP_GPIO_IRQ_POL_LOW 0x1
+
+#define XLP_GPIO_REGSZ 32
+#define XLP_GPIO_IRQ_BASE 768
+#define XLP_MAX_NR_GPIO 96
+
+/* XLP variants supported by this driver */
+enum {
+ XLP_GPIO_VARIANT_XLP832 = 1,
+ XLP_GPIO_VARIANT_XLP316,
+ XLP_GPIO_VARIANT_XLP208,
+ XLP_GPIO_VARIANT_XLP980,
+ XLP_GPIO_VARIANT_XLP532
+};
+
+struct xlp_gpio_priv {
+ struct gpio_chip chip;
+ DECLARE_BITMAP(gpio_enabled_mask, XLP_MAX_NR_GPIO);
+ void __iomem *gpio_intr_en; /* pointer to first intr enable reg */
+ void __iomem *gpio_intr_stat; /* pointer to first intr status reg */
+ void __iomem *gpio_intr_type; /* pointer to first intr type reg */
+ void __iomem *gpio_intr_pol; /* pointer to first intr polarity reg */
+ void __iomem *gpio_out_en; /* pointer to first output enable reg */
+ void __iomem *gpio_paddrv; /* pointer to first pad drive reg */
+ spinlock_t lock;
+};
+
+static struct xlp_gpio_priv *gpio_chip_to_xlp_priv(struct gpio_chip *gc)
+{
+ return container_of(gc, struct xlp_gpio_priv, chip);
+}
+
+static int xlp_gpio_get_reg(void __iomem *addr, unsigned gpio)
+{
+ u32 pos, regset;
+
+ pos = gpio % XLP_GPIO_REGSZ;
+ regset = (gpio / XLP_GPIO_REGSZ) * 4;
+ return !!(readl(addr + regset) & BIT(pos));
+}
+
+static void xlp_gpio_set_reg(void __iomem *addr, unsigned gpio, int state)
+{
+ u32 value, pos, regset;
+
+ pos = gpio % XLP_GPIO_REGSZ;
+ regset = (gpio / XLP_GPIO_REGSZ) * 4;
+ value = readl(addr + regset);
+
+ if (state)
+ value |= BIT(pos);
+ else
+ value &= ~BIT(pos);
+
+ writel(value, addr + regset);
+}
+
+static void xlp_gpio_irq_disable(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ xlp_gpio_set_reg(priv->gpio_intr_en, d->hwirq, 0x0);
+ __clear_bit(d->hwirq, priv->gpio_enabled_mask);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static void xlp_gpio_irq_mask_ack(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ xlp_gpio_set_reg(priv->gpio_intr_en, d->hwirq, 0x0);
+ xlp_gpio_set_reg(priv->gpio_intr_stat, d->hwirq, 0x1);
+ __clear_bit(d->hwirq, priv->gpio_enabled_mask);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static void xlp_gpio_irq_unmask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ xlp_gpio_set_reg(priv->gpio_intr_en, d->hwirq, 0x1);
+ __set_bit(d->hwirq, priv->gpio_enabled_mask);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int xlp_gpio_set_irq_type(struct irq_data *d, unsigned int type)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+ int pol, irq_type;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ irq_type = XLP_GPIO_IRQ_TYPE_EDGE;
+ pol = XLP_GPIO_IRQ_POL_HIGH;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ irq_type = XLP_GPIO_IRQ_TYPE_EDGE;
+ pol = XLP_GPIO_IRQ_POL_LOW;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ irq_type = XLP_GPIO_IRQ_TYPE_LVL;
+ pol = XLP_GPIO_IRQ_POL_HIGH;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ irq_type = XLP_GPIO_IRQ_TYPE_LVL;
+ pol = XLP_GPIO_IRQ_POL_LOW;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ xlp_gpio_set_reg(priv->gpio_intr_type, d->hwirq, irq_type);
+ xlp_gpio_set_reg(priv->gpio_intr_pol, d->hwirq, pol);
+
+ return 0;
+}
+
+static struct irq_chip xlp_gpio_irq_chip = {
+ .name = "XLP-GPIO",
+ .irq_mask_ack = xlp_gpio_irq_mask_ack,
+ .irq_disable = xlp_gpio_irq_disable,
+ .irq_set_type = xlp_gpio_set_irq_type,
+ .irq_unmask = xlp_gpio_irq_unmask,
+ .flags = IRQCHIP_ONESHOT_SAFE,
+};
+
+static void xlp_gpio_generic_handler(struct irq_desc *desc)
+{
+ struct xlp_gpio_priv *priv = irq_desc_get_handler_data(desc);
+ struct irq_chip *irqchip = irq_desc_get_chip(desc);
+ int gpio, regoff;
+ u32 gpio_stat;
+
+ regoff = -1;
+ gpio_stat = 0;
+
+ chained_irq_enter(irqchip, desc);
+ for_each_set_bit(gpio, priv->gpio_enabled_mask, XLP_MAX_NR_GPIO) {
+ if (regoff != gpio / XLP_GPIO_REGSZ) {
+ regoff = gpio / XLP_GPIO_REGSZ;
+ gpio_stat = readl(priv->gpio_intr_stat + regoff * 4);
+ }
+
+ if (gpio_stat & BIT(gpio % XLP_GPIO_REGSZ))
+ generic_handle_irq(irq_find_mapping(
+ priv->chip.irqdomain, gpio));
+ }
+ chained_irq_exit(irqchip, desc);
+}
+
+static int xlp_gpio_dir_output(struct gpio_chip *gc, unsigned gpio, int state)
+{
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+
+ BUG_ON(gpio >= gc->ngpio);
+ xlp_gpio_set_reg(priv->gpio_out_en, gpio, 0x1);
+
+ return 0;
+}
+
+static int xlp_gpio_dir_input(struct gpio_chip *gc, unsigned gpio)
+{
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+
+ BUG_ON(gpio >= gc->ngpio);
+ xlp_gpio_set_reg(priv->gpio_out_en, gpio, 0x0);
+
+ return 0;
+}
+
+static int xlp_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+
+ BUG_ON(gpio >= gc->ngpio);
+ return xlp_gpio_get_reg(priv->gpio_paddrv, gpio);
+}
+
+static void xlp_gpio_set(struct gpio_chip *gc, unsigned gpio, int state)
+{
+ struct xlp_gpio_priv *priv = gpio_chip_to_xlp_priv(gc);
+
+ BUG_ON(gpio >= gc->ngpio);
+ xlp_gpio_set_reg(priv->gpio_paddrv, gpio, state);
+}
+
+static const struct of_device_id xlp_gpio_of_ids[] = {
+ {
+ .compatible = "netlogic,xlp832-gpio",
+ .data = (void *)XLP_GPIO_VARIANT_XLP832,
+ },
+ {
+ .compatible = "netlogic,xlp316-gpio",
+ .data = (void *)XLP_GPIO_VARIANT_XLP316,
+ },
+ {
+ .compatible = "netlogic,xlp208-gpio",
+ .data = (void *)XLP_GPIO_VARIANT_XLP208,
+ },
+ {
+ .compatible = "netlogic,xlp980-gpio",
+ .data = (void *)XLP_GPIO_VARIANT_XLP980,
+ },
+ {
+ .compatible = "netlogic,xlp532-gpio",
+ .data = (void *)XLP_GPIO_VARIANT_XLP532,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, xlp_gpio_of_ids);
+
+static int xlp_gpio_probe(struct platform_device *pdev)
+{
+ struct gpio_chip *gc;
+ struct resource *iores;
+ struct xlp_gpio_priv *priv;
+ const struct of_device_id *of_id;
+ void __iomem *gpio_base;
+ int irq_base, irq, err;
+ int ngpio;
+ u32 soc_type;
+
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!iores)
+ return -ENODEV;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ gpio_base = devm_ioremap_resource(&pdev->dev, iores);
+ if (IS_ERR(gpio_base))
+ return PTR_ERR(gpio_base);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ of_id = of_match_device(xlp_gpio_of_ids, &pdev->dev);
+ if (!of_id) {
+ dev_err(&pdev->dev, "Failed to get soc type!\n");
+ return -ENODEV;
+ }
+
+ soc_type = (uintptr_t) of_id->data;
+
+ switch (soc_type) {
+ case XLP_GPIO_VARIANT_XLP832:
+ priv->gpio_out_en = gpio_base + GPIO_OUTPUT_EN;
+ priv->gpio_paddrv = gpio_base + GPIO_PADDRV;
+ priv->gpio_intr_stat = gpio_base + GPIO_INT_STAT;
+ priv->gpio_intr_type = gpio_base + GPIO_INT_TYPE;
+ priv->gpio_intr_pol = gpio_base + GPIO_INT_POL;
+ priv->gpio_intr_en = gpio_base + GPIO_INT_EN00;
+ ngpio = 41;
+ break;
+ case XLP_GPIO_VARIANT_XLP208:
+ case XLP_GPIO_VARIANT_XLP316:
+ priv->gpio_out_en = gpio_base + GPIO_OUTPUT_EN;
+ priv->gpio_paddrv = gpio_base + GPIO_PADDRV;
+ priv->gpio_intr_stat = gpio_base + GPIO_3XX_INT_STAT;
+ priv->gpio_intr_type = gpio_base + GPIO_3XX_INT_TYPE;
+ priv->gpio_intr_pol = gpio_base + GPIO_3XX_INT_POL;
+ priv->gpio_intr_en = gpio_base + GPIO_3XX_INT_EN00;
+
+ ngpio = (soc_type == XLP_GPIO_VARIANT_XLP208) ? 42 : 57;
+ break;
+ case XLP_GPIO_VARIANT_XLP980:
+ case XLP_GPIO_VARIANT_XLP532:
+ priv->gpio_out_en = gpio_base + GPIO_9XX_OUTPUT_EN;
+ priv->gpio_paddrv = gpio_base + GPIO_9XX_PADDRV;
+ priv->gpio_intr_stat = gpio_base + GPIO_9XX_INT_STAT;
+ priv->gpio_intr_type = gpio_base + GPIO_9XX_INT_TYPE;
+ priv->gpio_intr_pol = gpio_base + GPIO_9XX_INT_POL;
+ priv->gpio_intr_en = gpio_base + GPIO_9XX_INT_EN00;
+
+ ngpio = (soc_type == XLP_GPIO_VARIANT_XLP980) ? 66 : 67;
+ break;
+ default:
+ dev_err(&pdev->dev, "Unknown Processor type!\n");
+ return -ENODEV;
+ }
+
+ bitmap_zero(priv->gpio_enabled_mask, XLP_MAX_NR_GPIO);
+
+ gc = &priv->chip;
+
+ gc->owner = THIS_MODULE;
+ gc->label = dev_name(&pdev->dev);
+ gc->base = 0;
+ gc->dev = &pdev->dev;
+ gc->ngpio = ngpio;
+ gc->of_node = pdev->dev.of_node;
+ gc->direction_output = xlp_gpio_dir_output;
+ gc->direction_input = xlp_gpio_dir_input;
+ gc->set = xlp_gpio_set;
+ gc->get = xlp_gpio_get;
+
+ spin_lock_init(&priv->lock);
+ irq_base = irq_alloc_descs(-1, XLP_GPIO_IRQ_BASE, gc->ngpio, 0);
+ if (irq_base < 0) {
+ dev_err(&pdev->dev, "Failed to allocate IRQ numbers\n");
+ return -ENODEV;
+ }
+
+ err = gpiochip_add(gc);
+ if (err < 0)
+ goto out_free_desc;
+
+ err = gpiochip_irqchip_add(gc, &xlp_gpio_irq_chip, irq_base,
+ handle_level_irq, IRQ_TYPE_NONE);
+ if (err) {
+ dev_err(&pdev->dev, "Could not connect irqchip to gpiochip!\n");
+ goto out_gpio_remove;
+ }
+
+ gpiochip_set_chained_irqchip(gc, &xlp_gpio_irq_chip, irq,
+ xlp_gpio_generic_handler);
+
+ dev_info(&pdev->dev, "registered %d GPIOs\n", gc->ngpio);
+
+ return 0;
+
+out_gpio_remove:
+ gpiochip_remove(gc);
+out_free_desc:
+ irq_free_descs(irq_base, gc->ngpio);
+ return err;
+}
+
+static struct platform_driver xlp_gpio_driver = {
+ .driver = {
+ .name = "xlp-gpio",
+ .of_match_table = xlp_gpio_of_ids,
+ },
+ .probe = xlp_gpio_probe,
+};
+module_platform_driver(xlp_gpio_driver);
+
+MODULE_AUTHOR("Kamlakant Patel <kamlakant.patel@broadcom.com>");
+MODULE_AUTHOR("Ganesan Ramalingam <ganesanr@broadcom.com>");
+MODULE_DESCRIPTION("Netlogic XLP GPIO Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/gpio/gpio-zx.c b/kernel/drivers/gpio/gpio-zx.c
new file mode 100644
index 000000000..1dcf7a66d
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-zx.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (C) 2015 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/gpio/driver.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#define ZX_GPIO_DIR 0x00
+#define ZX_GPIO_IVE 0x04
+#define ZX_GPIO_IV 0x08
+#define ZX_GPIO_IEP 0x0C
+#define ZX_GPIO_IEN 0x10
+#define ZX_GPIO_DI 0x14
+#define ZX_GPIO_DO1 0x18
+#define ZX_GPIO_DO0 0x1C
+#define ZX_GPIO_DO 0x20
+
+#define ZX_GPIO_IM 0x28
+#define ZX_GPIO_IE 0x2C
+
+#define ZX_GPIO_MIS 0x30
+#define ZX_GPIO_IC 0x34
+
+#define ZX_GPIO_NR 16
+
+struct zx_gpio {
+ spinlock_t lock;
+
+ void __iomem *base;
+ struct gpio_chip gc;
+};
+
+static inline struct zx_gpio *to_zx(struct gpio_chip *gc)
+{
+ return container_of(gc, struct zx_gpio, gc);
+}
+
+static int zx_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ struct zx_gpio *chip = to_zx(gc);
+ unsigned long flags;
+ u16 gpiodir;
+
+ if (offset >= gc->ngpio)
+ return -EINVAL;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ gpiodir = readw_relaxed(chip->base + ZX_GPIO_DIR);
+ gpiodir &= ~BIT(offset);
+ writew_relaxed(gpiodir, chip->base + ZX_GPIO_DIR);
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ return 0;
+}
+
+static int zx_direction_output(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct zx_gpio *chip = to_zx(gc);
+ unsigned long flags;
+ u16 gpiodir;
+
+ if (offset >= gc->ngpio)
+ return -EINVAL;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ gpiodir = readw_relaxed(chip->base + ZX_GPIO_DIR);
+ gpiodir |= BIT(offset);
+ writew_relaxed(gpiodir, chip->base + ZX_GPIO_DIR);
+
+ if (value)
+ writew_relaxed(BIT(offset), chip->base + ZX_GPIO_DO1);
+ else
+ writew_relaxed(BIT(offset), chip->base + ZX_GPIO_DO0);
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ return 0;
+}
+
+static int zx_get_value(struct gpio_chip *gc, unsigned offset)
+{
+ struct zx_gpio *chip = to_zx(gc);
+
+ return !!(readw_relaxed(chip->base + ZX_GPIO_DI) & BIT(offset));
+}
+
+static void zx_set_value(struct gpio_chip *gc, unsigned offset, int value)
+{
+ struct zx_gpio *chip = to_zx(gc);
+
+ if (value)
+ writew_relaxed(BIT(offset), chip->base + ZX_GPIO_DO1);
+ else
+ writew_relaxed(BIT(offset), chip->base + ZX_GPIO_DO0);
+}
+
+static int zx_irq_type(struct irq_data *d, unsigned trigger)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct zx_gpio *chip = to_zx(gc);
+ int offset = irqd_to_hwirq(d);
+ unsigned long flags;
+ u16 gpiois, gpioi_epos, gpioi_eneg, gpioiev;
+ u16 bit = BIT(offset);
+
+ if (offset < 0 || offset >= ZX_GPIO_NR)
+ return -EINVAL;
+
+ spin_lock_irqsave(&chip->lock, flags);
+
+ gpioiev = readw_relaxed(chip->base + ZX_GPIO_IV);
+ gpiois = readw_relaxed(chip->base + ZX_GPIO_IVE);
+ gpioi_epos = readw_relaxed(chip->base + ZX_GPIO_IEP);
+ gpioi_eneg = readw_relaxed(chip->base + ZX_GPIO_IEN);
+
+ if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
+ gpiois |= bit;
+ if (trigger & IRQ_TYPE_LEVEL_HIGH)
+ gpioiev |= bit;
+ else
+ gpioiev &= ~bit;
+ } else
+ gpiois &= ~bit;
+
+ if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
+ gpioi_epos |= bit;
+ gpioi_eneg |= bit;
+ } else {
+ if (trigger & IRQ_TYPE_EDGE_RISING) {
+ gpioi_epos |= bit;
+ gpioi_eneg &= ~bit;
+ } else if (trigger & IRQ_TYPE_EDGE_FALLING) {
+ gpioi_eneg |= bit;
+ gpioi_epos &= ~bit;
+ }
+ }
+
+ writew_relaxed(gpiois, chip->base + ZX_GPIO_IVE);
+ writew_relaxed(gpioi_epos, chip->base + ZX_GPIO_IEP);
+ writew_relaxed(gpioi_eneg, chip->base + ZX_GPIO_IEN);
+ writew_relaxed(gpioiev, chip->base + ZX_GPIO_IV);
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ return 0;
+}
+
+static void zx_irq_handler(struct irq_desc *desc)
+{
+ unsigned long pending;
+ int offset;
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct zx_gpio *chip = to_zx(gc);
+ struct irq_chip *irqchip = irq_desc_get_chip(desc);
+
+ chained_irq_enter(irqchip, desc);
+
+ pending = readw_relaxed(chip->base + ZX_GPIO_MIS);
+ writew_relaxed(pending, chip->base + ZX_GPIO_IC);
+ if (pending) {
+ for_each_set_bit(offset, &pending, ZX_GPIO_NR)
+ generic_handle_irq(irq_find_mapping(gc->irqdomain,
+ offset));
+ }
+
+ chained_irq_exit(irqchip, desc);
+}
+
+static void zx_irq_mask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct zx_gpio *chip = to_zx(gc);
+ u16 mask = BIT(irqd_to_hwirq(d) % ZX_GPIO_NR);
+ u16 gpioie;
+
+ spin_lock(&chip->lock);
+ gpioie = readw_relaxed(chip->base + ZX_GPIO_IM) | mask;
+ writew_relaxed(gpioie, chip->base + ZX_GPIO_IM);
+ gpioie = readw_relaxed(chip->base + ZX_GPIO_IE) & ~mask;
+ writew_relaxed(gpioie, chip->base + ZX_GPIO_IE);
+ spin_unlock(&chip->lock);
+}
+
+static void zx_irq_unmask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct zx_gpio *chip = to_zx(gc);
+ u16 mask = BIT(irqd_to_hwirq(d) % ZX_GPIO_NR);
+ u16 gpioie;
+
+ spin_lock(&chip->lock);
+ gpioie = readw_relaxed(chip->base + ZX_GPIO_IM) & ~mask;
+ writew_relaxed(gpioie, chip->base + ZX_GPIO_IM);
+ gpioie = readw_relaxed(chip->base + ZX_GPIO_IE) | mask;
+ writew_relaxed(gpioie, chip->base + ZX_GPIO_IE);
+ spin_unlock(&chip->lock);
+}
+
+static struct irq_chip zx_irqchip = {
+ .name = "zx-gpio",
+ .irq_mask = zx_irq_mask,
+ .irq_unmask = zx_irq_unmask,
+ .irq_set_type = zx_irq_type,
+};
+
+static int zx_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct zx_gpio *chip;
+ struct resource *res;
+ int irq, id, ret;
+
+ chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ chip->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(chip->base))
+ return PTR_ERR(chip->base);
+
+ spin_lock_init(&chip->lock);
+ if (of_property_read_bool(dev->of_node, "gpio-ranges")) {
+ chip->gc.request = gpiochip_generic_request;
+ chip->gc.free = gpiochip_generic_free;
+ }
+
+ id = of_alias_get_id(dev->of_node, "gpio");
+ chip->gc.direction_input = zx_direction_input;
+ chip->gc.direction_output = zx_direction_output;
+ chip->gc.get = zx_get_value;
+ chip->gc.set = zx_set_value;
+ chip->gc.base = ZX_GPIO_NR * id;
+ chip->gc.ngpio = ZX_GPIO_NR;
+ chip->gc.label = dev_name(dev);
+ chip->gc.dev = dev;
+ chip->gc.owner = THIS_MODULE;
+
+ ret = gpiochip_add(&chip->gc);
+ if (ret)
+ return ret;
+
+ /*
+ * irq_chip support
+ */
+ writew_relaxed(0xffff, chip->base + ZX_GPIO_IM);
+ writew_relaxed(0, chip->base + ZX_GPIO_IE);
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "invalid IRQ\n");
+ gpiochip_remove(&chip->gc);
+ return -ENODEV;
+ }
+
+ ret = gpiochip_irqchip_add(&chip->gc, &zx_irqchip,
+ 0, handle_simple_irq,
+ IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "could not add irqchip\n");
+ gpiochip_remove(&chip->gc);
+ return ret;
+ }
+ gpiochip_set_chained_irqchip(&chip->gc, &zx_irqchip,
+ irq, zx_irq_handler);
+
+ platform_set_drvdata(pdev, chip);
+ dev_info(dev, "ZX GPIO chip registered\n");
+
+ return 0;
+}
+
+static const struct of_device_id zx_gpio_match[] = {
+ {
+ .compatible = "zte,zx296702-gpio",
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, zx_gpio_match);
+
+static struct platform_driver zx_gpio_driver = {
+ .probe = zx_gpio_probe,
+ .driver = {
+ .name = "zx_gpio",
+ .of_match_table = of_match_ptr(zx_gpio_match),
+ },
+};
+
+module_platform_driver(zx_gpio_driver)
+
+MODULE_AUTHOR("Jun Nie <jun.nie@linaro.org>");
+MODULE_DESCRIPTION("ZTE ZX296702 GPIO driver");
+MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/gpio/gpio-zynq.c b/kernel/drivers/gpio/gpio-zynq.c
index 184c4b1b2..8abeacac5 100644
--- a/kernel/drivers/gpio/gpio-zynq.c
+++ b/kernel/drivers/gpio/gpio-zynq.c
@@ -18,34 +18,47 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
#define DRIVER_NAME "zynq-gpio"
/* Maximum banks */
#define ZYNQ_GPIO_MAX_BANK 4
+#define ZYNQMP_GPIO_MAX_BANK 6
#define ZYNQ_GPIO_BANK0_NGPIO 32
#define ZYNQ_GPIO_BANK1_NGPIO 22
#define ZYNQ_GPIO_BANK2_NGPIO 32
#define ZYNQ_GPIO_BANK3_NGPIO 32
-#define ZYNQ_GPIO_NR_GPIOS (ZYNQ_GPIO_BANK0_NGPIO + \
- ZYNQ_GPIO_BANK1_NGPIO + \
- ZYNQ_GPIO_BANK2_NGPIO + \
- ZYNQ_GPIO_BANK3_NGPIO)
-
-#define ZYNQ_GPIO_BANK0_PIN_MIN 0
-#define ZYNQ_GPIO_BANK0_PIN_MAX (ZYNQ_GPIO_BANK0_PIN_MIN + \
- ZYNQ_GPIO_BANK0_NGPIO - 1)
-#define ZYNQ_GPIO_BANK1_PIN_MIN (ZYNQ_GPIO_BANK0_PIN_MAX + 1)
-#define ZYNQ_GPIO_BANK1_PIN_MAX (ZYNQ_GPIO_BANK1_PIN_MIN + \
- ZYNQ_GPIO_BANK1_NGPIO - 1)
-#define ZYNQ_GPIO_BANK2_PIN_MIN (ZYNQ_GPIO_BANK1_PIN_MAX + 1)
-#define ZYNQ_GPIO_BANK2_PIN_MAX (ZYNQ_GPIO_BANK2_PIN_MIN + \
- ZYNQ_GPIO_BANK2_NGPIO - 1)
-#define ZYNQ_GPIO_BANK3_PIN_MIN (ZYNQ_GPIO_BANK2_PIN_MAX + 1)
-#define ZYNQ_GPIO_BANK3_PIN_MAX (ZYNQ_GPIO_BANK3_PIN_MIN + \
- ZYNQ_GPIO_BANK3_NGPIO - 1)
+#define ZYNQMP_GPIO_BANK0_NGPIO 26
+#define ZYNQMP_GPIO_BANK1_NGPIO 26
+#define ZYNQMP_GPIO_BANK2_NGPIO 26
+#define ZYNQMP_GPIO_BANK3_NGPIO 32
+#define ZYNQMP_GPIO_BANK4_NGPIO 32
+#define ZYNQMP_GPIO_BANK5_NGPIO 32
+
+#define ZYNQ_GPIO_NR_GPIOS 118
+#define ZYNQMP_GPIO_NR_GPIOS 174
+
+#define ZYNQ_GPIO_BANK0_PIN_MIN(str) 0
+#define ZYNQ_GPIO_BANK0_PIN_MAX(str) (ZYNQ_GPIO_BANK0_PIN_MIN(str) + \
+ ZYNQ##str##_GPIO_BANK0_NGPIO - 1)
+#define ZYNQ_GPIO_BANK1_PIN_MIN(str) (ZYNQ_GPIO_BANK0_PIN_MAX(str) + 1)
+#define ZYNQ_GPIO_BANK1_PIN_MAX(str) (ZYNQ_GPIO_BANK1_PIN_MIN(str) + \
+ ZYNQ##str##_GPIO_BANK1_NGPIO - 1)
+#define ZYNQ_GPIO_BANK2_PIN_MIN(str) (ZYNQ_GPIO_BANK1_PIN_MAX(str) + 1)
+#define ZYNQ_GPIO_BANK2_PIN_MAX(str) (ZYNQ_GPIO_BANK2_PIN_MIN(str) + \
+ ZYNQ##str##_GPIO_BANK2_NGPIO - 1)
+#define ZYNQ_GPIO_BANK3_PIN_MIN(str) (ZYNQ_GPIO_BANK2_PIN_MAX(str) + 1)
+#define ZYNQ_GPIO_BANK3_PIN_MAX(str) (ZYNQ_GPIO_BANK3_PIN_MIN(str) + \
+ ZYNQ##str##_GPIO_BANK3_NGPIO - 1)
+#define ZYNQ_GPIO_BANK4_PIN_MIN(str) (ZYNQ_GPIO_BANK3_PIN_MAX(str) + 1)
+#define ZYNQ_GPIO_BANK4_PIN_MAX(str) (ZYNQ_GPIO_BANK4_PIN_MIN(str) + \
+ ZYNQ##str##_GPIO_BANK4_NGPIO - 1)
+#define ZYNQ_GPIO_BANK5_PIN_MIN(str) (ZYNQ_GPIO_BANK4_PIN_MAX(str) + 1)
+#define ZYNQ_GPIO_BANK5_PIN_MAX(str) (ZYNQ_GPIO_BANK5_PIN_MIN(str) + \
+ ZYNQ##str##_GPIO_BANK5_NGPIO - 1)
/* Register offsets for the GPIO device */
@@ -89,16 +102,40 @@
* @base_addr: base address of the GPIO device
* @clk: clock resource for this controller
* @irq: interrupt for the GPIO device
+ * @p_data: pointer to platform data
*/
struct zynq_gpio {
struct gpio_chip chip;
void __iomem *base_addr;
struct clk *clk;
int irq;
+ const struct zynq_platform_data *p_data;
+};
+
+/**
+ * struct zynq_platform_data - zynq gpio platform data structure
+ * @label: string to store in gpio->label
+ * @ngpio: max number of gpio pins
+ * @max_bank: maximum number of gpio banks
+ * @bank_min: this array represents bank's min pin
+ * @bank_max: this array represents bank's max pin
+*/
+struct zynq_platform_data {
+ const char *label;
+ u16 ngpio;
+ int max_bank;
+ int bank_min[ZYNQMP_GPIO_MAX_BANK];
+ int bank_max[ZYNQMP_GPIO_MAX_BANK];
};
static struct irq_chip zynq_gpio_level_irqchip;
static struct irq_chip zynq_gpio_edge_irqchip;
+
+static struct zynq_gpio *to_zynq_gpio(struct gpio_chip *gc)
+{
+ return container_of(gc, struct zynq_gpio, chip);
+}
+
/**
* zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank
* for a given pin in the GPIO device
@@ -112,39 +149,26 @@ static struct irq_chip zynq_gpio_edge_irqchip;
*/
static inline void zynq_gpio_get_bank_pin(unsigned int pin_num,
unsigned int *bank_num,
- unsigned int *bank_pin_num)
+ unsigned int *bank_pin_num,
+ struct zynq_gpio *gpio)
{
- switch (pin_num) {
- case ZYNQ_GPIO_BANK0_PIN_MIN ... ZYNQ_GPIO_BANK0_PIN_MAX:
- *bank_num = 0;
- *bank_pin_num = pin_num;
- break;
- case ZYNQ_GPIO_BANK1_PIN_MIN ... ZYNQ_GPIO_BANK1_PIN_MAX:
- *bank_num = 1;
- *bank_pin_num = pin_num - ZYNQ_GPIO_BANK1_PIN_MIN;
- break;
- case ZYNQ_GPIO_BANK2_PIN_MIN ... ZYNQ_GPIO_BANK2_PIN_MAX:
- *bank_num = 2;
- *bank_pin_num = pin_num - ZYNQ_GPIO_BANK2_PIN_MIN;
- break;
- case ZYNQ_GPIO_BANK3_PIN_MIN ... ZYNQ_GPIO_BANK3_PIN_MAX:
- *bank_num = 3;
- *bank_pin_num = pin_num - ZYNQ_GPIO_BANK3_PIN_MIN;
- break;
- default:
- WARN(true, "invalid GPIO pin number: %u", pin_num);
- *bank_num = 0;
- *bank_pin_num = 0;
- break;
+ int bank;
+
+ for (bank = 0; bank < gpio->p_data->max_bank; bank++) {
+ if ((pin_num >= gpio->p_data->bank_min[bank]) &&
+ (pin_num <= gpio->p_data->bank_max[bank])) {
+ *bank_num = bank;
+ *bank_pin_num = pin_num -
+ gpio->p_data->bank_min[bank];
+ return;
+ }
}
-}
-static const unsigned int zynq_gpio_bank_offset[] = {
- ZYNQ_GPIO_BANK0_PIN_MIN,
- ZYNQ_GPIO_BANK1_PIN_MIN,
- ZYNQ_GPIO_BANK2_PIN_MIN,
- ZYNQ_GPIO_BANK3_PIN_MIN,
-};
+ /* default */
+ WARN(true, "invalid GPIO pin number: %u", pin_num);
+ *bank_num = 0;
+ *bank_pin_num = 0;
+}
/**
* zynq_gpio_get_value - Get the state of the specified pin of GPIO device
@@ -159,9 +183,9 @@ static int zynq_gpio_get_value(struct gpio_chip *chip, unsigned int pin)
{
u32 data;
unsigned int bank_num, bank_pin_num;
- struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+ struct zynq_gpio *gpio = to_zynq_gpio(chip);
- zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
data = readl_relaxed(gpio->base_addr +
ZYNQ_GPIO_DATA_RO_OFFSET(bank_num));
@@ -183,9 +207,9 @@ static void zynq_gpio_set_value(struct gpio_chip *chip, unsigned int pin,
int state)
{
unsigned int reg_offset, bank_num, bank_pin_num;
- struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+ struct zynq_gpio *gpio = to_zynq_gpio(chip);
- zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
if (bank_pin_num >= ZYNQ_GPIO_MID_PIN_NUM) {
/* only 16 data bits in bit maskable reg */
@@ -220,9 +244,9 @@ static int zynq_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)
{
u32 reg;
unsigned int bank_num, bank_pin_num;
- struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+ struct zynq_gpio *gpio = to_zynq_gpio(chip);
- zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
/* bank 0 pins 7 and 8 are special and cannot be used as inputs */
if (bank_num == 0 && (bank_pin_num == 7 || bank_pin_num == 8))
@@ -253,9 +277,9 @@ static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin,
{
u32 reg;
unsigned int bank_num, bank_pin_num;
- struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+ struct zynq_gpio *gpio = to_zynq_gpio(chip);
- zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
/* set the GPIO pin as output */
reg = readl_relaxed(gpio->base_addr + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
@@ -283,10 +307,11 @@ static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin,
static void zynq_gpio_irq_mask(struct irq_data *irq_data)
{
unsigned int device_pin_num, bank_num, bank_pin_num;
- struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+ struct zynq_gpio *gpio =
+ to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
device_pin_num = irq_data->hwirq;
- zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
writel_relaxed(BIT(bank_pin_num),
gpio->base_addr + ZYNQ_GPIO_INTDIS_OFFSET(bank_num));
}
@@ -303,10 +328,11 @@ static void zynq_gpio_irq_mask(struct irq_data *irq_data)
static void zynq_gpio_irq_unmask(struct irq_data *irq_data)
{
unsigned int device_pin_num, bank_num, bank_pin_num;
- struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+ struct zynq_gpio *gpio =
+ to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
device_pin_num = irq_data->hwirq;
- zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
writel_relaxed(BIT(bank_pin_num),
gpio->base_addr + ZYNQ_GPIO_INTEN_OFFSET(bank_num));
}
@@ -322,10 +348,11 @@ static void zynq_gpio_irq_unmask(struct irq_data *irq_data)
static void zynq_gpio_irq_ack(struct irq_data *irq_data)
{
unsigned int device_pin_num, bank_num, bank_pin_num;
- struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+ struct zynq_gpio *gpio =
+ to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
device_pin_num = irq_data->hwirq;
- zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
writel_relaxed(BIT(bank_pin_num),
gpio->base_addr + ZYNQ_GPIO_INTSTS_OFFSET(bank_num));
}
@@ -335,7 +362,7 @@ static void zynq_gpio_irq_ack(struct irq_data *irq_data)
* @irq_data: irq data containing irq number of gpio pin for the interrupt
* to enable
*
- * Clears the INTSTS bit and unmasks the given interrrupt.
+ * Clears the INTSTS bit and unmasks the given interrupt.
*/
static void zynq_gpio_irq_enable(struct irq_data *irq_data)
{
@@ -372,10 +399,11 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
{
u32 int_type, int_pol, int_any;
unsigned int device_pin_num, bank_num, bank_pin_num;
- struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+ struct zynq_gpio *gpio =
+ to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
device_pin_num = irq_data->hwirq;
- zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
int_type = readl_relaxed(gpio->base_addr +
ZYNQ_GPIO_INTTYPE_OFFSET(bank_num));
@@ -423,10 +451,10 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
gpio->base_addr + ZYNQ_GPIO_INTANY_OFFSET(bank_num));
if (type & IRQ_TYPE_LEVEL_MASK) {
- __irq_set_chip_handler_name_locked(irq_data->irq,
+ irq_set_chip_handler_name_locked(irq_data,
&zynq_gpio_level_irqchip, handle_fasteoi_irq, NULL);
} else {
- __irq_set_chip_handler_name_locked(irq_data->irq,
+ irq_set_chip_handler_name_locked(irq_data,
&zynq_gpio_edge_irqchip, handle_level_irq, NULL);
}
@@ -435,7 +463,8 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on)
{
- struct zynq_gpio *gpio = irq_data_get_irq_chip_data(data);
+ struct zynq_gpio *gpio =
+ to_zynq_gpio(irq_data_get_irq_chip_data(data));
irq_set_irq_wake(gpio->irq, on);
@@ -470,7 +499,7 @@ static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio,
unsigned int bank_num,
unsigned long pending)
{
- unsigned int bank_offset = zynq_gpio_bank_offset[bank_num];
+ unsigned int bank_offset = gpio->p_data->bank_min[bank_num];
struct irq_domain *irqdomain = gpio->chip.irqdomain;
int offset;
@@ -496,16 +525,17 @@ static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio,
* application for that pin.
* Note: A bug is reported if no handler is set for the gpio pin.
*/
-static void zynq_gpio_irqhandler(unsigned int irq, struct irq_desc *desc)
+static void zynq_gpio_irqhandler(struct irq_desc *desc)
{
u32 int_sts, int_enb;
unsigned int bank_num;
- struct zynq_gpio *gpio = irq_get_handler_data(irq);
+ struct zynq_gpio *gpio =
+ to_zynq_gpio(irq_desc_get_handler_data(desc));
struct irq_chip *irqchip = irq_desc_get_chip(desc);
chained_irq_enter(irqchip, desc);
- for (bank_num = 0; bank_num < ZYNQ_GPIO_MAX_BANK; bank_num++) {
+ for (bank_num = 0; bank_num < gpio->p_data->max_bank; bank_num++) {
int_sts = readl_relaxed(gpio->base_addr +
ZYNQ_GPIO_INTSTS_OFFSET(bank_num));
int_enb = readl_relaxed(gpio->base_addr +
@@ -582,6 +612,46 @@ static const struct dev_pm_ops zynq_gpio_dev_pm_ops = {
zynq_gpio_runtime_resume, NULL)
};
+static const struct zynq_platform_data zynqmp_gpio_def = {
+ .label = "zynqmp_gpio",
+ .ngpio = ZYNQMP_GPIO_NR_GPIOS,
+ .max_bank = ZYNQMP_GPIO_MAX_BANK,
+ .bank_min[0] = ZYNQ_GPIO_BANK0_PIN_MIN(MP),
+ .bank_max[0] = ZYNQ_GPIO_BANK0_PIN_MAX(MP),
+ .bank_min[1] = ZYNQ_GPIO_BANK1_PIN_MIN(MP),
+ .bank_max[1] = ZYNQ_GPIO_BANK1_PIN_MAX(MP),
+ .bank_min[2] = ZYNQ_GPIO_BANK2_PIN_MIN(MP),
+ .bank_max[2] = ZYNQ_GPIO_BANK2_PIN_MAX(MP),
+ .bank_min[3] = ZYNQ_GPIO_BANK3_PIN_MIN(MP),
+ .bank_max[3] = ZYNQ_GPIO_BANK3_PIN_MAX(MP),
+ .bank_min[4] = ZYNQ_GPIO_BANK4_PIN_MIN(MP),
+ .bank_max[4] = ZYNQ_GPIO_BANK4_PIN_MAX(MP),
+ .bank_min[5] = ZYNQ_GPIO_BANK5_PIN_MIN(MP),
+ .bank_max[5] = ZYNQ_GPIO_BANK5_PIN_MAX(MP),
+};
+
+static const struct zynq_platform_data zynq_gpio_def = {
+ .label = "zynq_gpio",
+ .ngpio = ZYNQ_GPIO_NR_GPIOS,
+ .max_bank = ZYNQ_GPIO_MAX_BANK,
+ .bank_min[0] = ZYNQ_GPIO_BANK0_PIN_MIN(),
+ .bank_max[0] = ZYNQ_GPIO_BANK0_PIN_MAX(),
+ .bank_min[1] = ZYNQ_GPIO_BANK1_PIN_MIN(),
+ .bank_max[1] = ZYNQ_GPIO_BANK1_PIN_MAX(),
+ .bank_min[2] = ZYNQ_GPIO_BANK2_PIN_MIN(),
+ .bank_max[2] = ZYNQ_GPIO_BANK2_PIN_MAX(),
+ .bank_min[3] = ZYNQ_GPIO_BANK3_PIN_MIN(),
+ .bank_max[3] = ZYNQ_GPIO_BANK3_PIN_MAX(),
+};
+
+static const struct of_device_id zynq_gpio_of_match[] = {
+ { .compatible = "xlnx,zynq-gpio-1.0", .data = (void *)&zynq_gpio_def },
+ { .compatible = "xlnx,zynqmp-gpio-1.0",
+ .data = (void *)&zynqmp_gpio_def },
+ { /* end of table */ }
+};
+MODULE_DEVICE_TABLE(of, zynq_gpio_of_match);
+
/**
* zynq_gpio_probe - Initialization method for a zynq_gpio device
* @pdev: platform device instance
@@ -599,11 +669,18 @@ static int zynq_gpio_probe(struct platform_device *pdev)
struct zynq_gpio *gpio;
struct gpio_chip *chip;
struct resource *res;
+ const struct of_device_id *match;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
+ match = of_match_node(zynq_gpio_of_match, pdev->dev.of_node);
+ if (!match) {
+ dev_err(&pdev->dev, "of_match_node() failed\n");
+ return -EINVAL;
+ }
+ gpio->p_data = match->data;
platform_set_drvdata(pdev, gpio);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -619,7 +696,7 @@ static int zynq_gpio_probe(struct platform_device *pdev)
/* configure the gpio chip */
chip = &gpio->chip;
- chip->label = "zynq_gpio";
+ chip->label = gpio->p_data->label;
chip->owner = THIS_MODULE;
chip->dev = &pdev->dev;
chip->get = zynq_gpio_get_value;
@@ -629,7 +706,7 @@ static int zynq_gpio_probe(struct platform_device *pdev)
chip->direction_input = zynq_gpio_dir_in;
chip->direction_output = zynq_gpio_dir_out;
chip->base = -1;
- chip->ngpio = ZYNQ_GPIO_NR_GPIOS;
+ chip->ngpio = gpio->p_data->ngpio;
/* Enable GPIO clock */
gpio->clk = devm_clk_get(&pdev->dev, NULL);
@@ -651,7 +728,7 @@ static int zynq_gpio_probe(struct platform_device *pdev)
}
/* disable interrupts for all banks */
- for (bank_num = 0; bank_num < ZYNQ_GPIO_MAX_BANK; bank_num++)
+ for (bank_num = 0; bank_num < gpio->p_data->max_bank; bank_num++)
writel_relaxed(ZYNQ_GPIO_IXR_DISABLE_ALL, gpio->base_addr +
ZYNQ_GPIO_INTDIS_OFFSET(bank_num));
@@ -692,15 +769,10 @@ static int zynq_gpio_remove(struct platform_device *pdev)
gpiochip_remove(&gpio->chip);
clk_disable_unprepare(gpio->clk);
device_set_wakeup_capable(&pdev->dev, 0);
+ pm_runtime_disable(&pdev->dev);
return 0;
}
-static struct of_device_id zynq_gpio_of_match[] = {
- { .compatible = "xlnx,zynq-gpio-1.0", },
- { /* end of table */ }
-};
-MODULE_DEVICE_TABLE(of, zynq_gpio_of_match);
-
static struct platform_driver zynq_gpio_driver = {
.driver = {
.name = DRIVER_NAME,
@@ -722,6 +794,12 @@ static int __init zynq_gpio_init(void)
}
postcore_initcall(zynq_gpio_init);
+static void __exit zynq_gpio_exit(void)
+{
+ platform_driver_unregister(&zynq_gpio_driver);
+}
+module_exit(zynq_gpio_exit);
+
MODULE_AUTHOR("Xilinx Inc.");
MODULE_DESCRIPTION("Zynq GPIO driver");
MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/gpio/gpiolib-acpi.c b/kernel/drivers/gpio/gpiolib-acpi.c
index 725d16138..16a7b6816 100644
--- a/kernel/drivers/gpio/gpiolib-acpi.c
+++ b/kernel/drivers/gpio/gpiolib-acpi.c
@@ -68,7 +68,7 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
* GPIO controller driver.
*
* Typically the returned offset is same as @pin, but if the GPIO
- * controller uses pin controller and the mapping is not contigous the
+ * controller uses pin controller and the mapping is not contiguous the
* offset might be different.
*/
static int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip, int pin)
@@ -114,10 +114,11 @@ static inline int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip,
* @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
* @pin: ACPI GPIO pin number (0-based, controller-relative)
*
- * Returns GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR
- * error value
+ * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR
+ * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO
+ * controller does not have gpiochip registered at the moment. This is to
+ * support probe deferral.
*/
-
static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
{
struct gpio_chip *chip;
@@ -131,7 +132,7 @@ static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
chip = gpiochip_find(handle, acpi_gpiochip_find);
if (!chip)
- return ERR_PTR(-ENODEV);
+ return ERR_PTR(-EPROBE_DEFER);
offset = acpi_gpiochip_pin_to_gpio_offset(chip, pin);
if (offset < 0)
@@ -303,10 +304,10 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
if (ACPI_FAILURE(status))
return;
- INIT_LIST_HEAD(&acpi_gpio->events);
acpi_walk_resources(handle, "_AEI",
acpi_gpiochip_request_interrupt, acpi_gpio);
}
+EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts);
/**
* acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
@@ -346,6 +347,7 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
kfree(event);
}
}
+EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts);
int acpi_dev_add_driver_gpios(struct acpi_device *adev,
const struct acpi_gpio_mapping *gpios)
@@ -386,6 +388,8 @@ struct acpi_gpio_lookup {
struct acpi_gpio_info info;
int index;
int pin_index;
+ bool active_low;
+ struct acpi_device *adev;
struct gpio_desc *desc;
int n;
};
@@ -422,6 +426,65 @@ static int acpi_find_gpio(struct acpi_resource *ares, void *data)
return 1;
}
+static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup,
+ struct acpi_gpio_info *info)
+{
+ struct list_head res_list;
+ int ret;
+
+ INIT_LIST_HEAD(&res_list);
+
+ ret = acpi_dev_get_resources(lookup->adev, &res_list, acpi_find_gpio,
+ lookup);
+ if (ret < 0)
+ return ret;
+
+ acpi_dev_free_resource_list(&res_list);
+
+ if (!lookup->desc)
+ return -ENOENT;
+
+ if (info) {
+ *info = lookup->info;
+ if (lookup->active_low)
+ info->active_low = lookup->active_low;
+ }
+ return 0;
+}
+
+static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
+ const char *propname, int index,
+ struct acpi_gpio_lookup *lookup)
+{
+ struct acpi_reference_args args;
+ int ret;
+
+ memset(&args, 0, sizeof(args));
+ ret = acpi_node_get_property_reference(fwnode, propname, index, &args);
+ if (ret) {
+ struct acpi_device *adev = to_acpi_device_node(fwnode);
+
+ if (!adev)
+ return ret;
+
+ if (!acpi_get_driver_gpio_data(adev, propname, index, &args))
+ return ret;
+ }
+ /*
+ * The property was found and resolved, so need to lookup the GPIO based
+ * on returned args.
+ */
+ lookup->adev = args.adev;
+ if (args.nargs >= 2) {
+ lookup->index = args.args[0];
+ lookup->pin_index = args.args[1];
+ /* 3rd argument, if present is used to specify active_low. */
+ if (args.nargs >= 3)
+ lookup->active_low = !!args.args[2];
+ }
+ return 0;
+}
+
/**
* acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources
* @adev: pointer to a ACPI device to get GPIO from
@@ -449,8 +512,6 @@ struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev,
struct acpi_gpio_info *info)
{
struct acpi_gpio_lookup lookup;
- struct list_head resource_list;
- bool active_low = false;
int ret;
if (!adev)
@@ -460,59 +521,94 @@ struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev,
lookup.index = index;
if (propname) {
- struct acpi_reference_args args;
-
dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname);
- memset(&args, 0, sizeof(args));
- ret = acpi_dev_get_property_reference(adev, propname,
- index, &args);
- if (ret) {
- bool found = acpi_get_driver_gpio_data(adev, propname,
- index, &args);
- if (!found)
- return ERR_PTR(ret);
- }
-
- /*
- * The property was found and resolved so need to
- * lookup the GPIO based on returned args instead.
- */
- adev = args.adev;
- if (args.nargs >= 2) {
- lookup.index = args.args[0];
- lookup.pin_index = args.args[1];
- /*
- * 3rd argument, if present is used to
- * specify active_low.
- */
- if (args.nargs >= 3)
- active_low = !!args.args[2];
- }
+ ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev),
+ propname, index, &lookup);
+ if (ret)
+ return ERR_PTR(ret);
- dev_dbg(&adev->dev, "GPIO: _DSD returned %s %zd %llu %llu %llu\n",
- dev_name(&adev->dev), args.nargs,
- args.args[0], args.args[1], args.args[2]);
+ dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %d %u\n",
+ dev_name(&lookup.adev->dev), lookup.index,
+ lookup.pin_index, lookup.active_low);
} else {
dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index);
+ lookup.adev = adev;
}
- INIT_LIST_HEAD(&resource_list);
- ret = acpi_dev_get_resources(adev, &resource_list, acpi_find_gpio,
- &lookup);
- if (ret < 0)
+ ret = acpi_gpio_resource_lookup(&lookup, info);
+ return ret ? ERR_PTR(ret) : lookup.desc;
+}
+
+/**
+ * acpi_node_get_gpiod() - get a GPIO descriptor from ACPI resources
+ * @fwnode: pointer to an ACPI firmware node to get the GPIO information from
+ * @propname: Property name of the GPIO
+ * @index: index of GpioIo/GpioInt resource (starting from %0)
+ * @info: info pointer to fill in (optional)
+ *
+ * If @fwnode is an ACPI device object, call %acpi_get_gpiod_by_index() for it.
+ * Otherwise (ie. it is a data-only non-device object), use the property-based
+ * GPIO lookup to get to the GPIO resource with the relevant information and use
+ * that to obtain the GPIO descriptor to return.
+ */
+struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
+ const char *propname, int index,
+ struct acpi_gpio_info *info)
+{
+ struct acpi_gpio_lookup lookup;
+ struct acpi_device *adev;
+ int ret;
+
+ adev = to_acpi_device_node(fwnode);
+ if (adev)
+ return acpi_get_gpiod_by_index(adev, propname, index, info);
+
+ if (!is_acpi_data_node(fwnode))
+ return ERR_PTR(-ENODEV);
+
+ if (!propname)
+ return ERR_PTR(-EINVAL);
+
+ memset(&lookup, 0, sizeof(lookup));
+ lookup.index = index;
+
+ ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup);
+ if (ret)
return ERR_PTR(ret);
- acpi_dev_free_resource_list(&resource_list);
+ ret = acpi_gpio_resource_lookup(&lookup, info);
+ return ret ? ERR_PTR(ret) : lookup.desc;
+}
- if (lookup.desc && info) {
- *info = lookup.info;
- if (active_low)
- info->active_low = active_low;
- }
+/**
+ * acpi_dev_gpio_irq_get() - Find GpioInt and translate it to Linux IRQ number
+ * @adev: pointer to a ACPI device to get IRQ from
+ * @index: index of GpioInt resource (starting from %0)
+ *
+ * If the device has one or more GpioInt resources, this function can be
+ * used to translate from the GPIO offset in the resource to the Linux IRQ
+ * number.
+ *
+ * Return: Linux IRQ number (>%0) on success, negative errno on failure.
+ */
+int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
+{
+ int idx, i;
- return lookup.desc ? lookup.desc : ERR_PTR(-ENOENT);
+ for (i = 0, idx = 0; idx <= index; i++) {
+ struct acpi_gpio_info info;
+ struct gpio_desc *desc;
+
+ desc = acpi_get_gpiod_by_index(adev, NULL, i, &info);
+ if (IS_ERR(desc))
+ break;
+ if (info.gpioint && idx++ == index)
+ return gpiod_to_irq(desc);
+ }
+ return -ENOENT;
}
+EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get);
static acpi_status
acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
@@ -571,6 +667,25 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
break;
}
}
+
+ /*
+ * The same GPIO can be shared between operation region and
+ * event but only if the access here is ACPI_READ. In that
+ * case we "borrow" the event GPIO instead.
+ */
+ if (!found && agpio->sharable == ACPI_SHARED &&
+ function == ACPI_READ) {
+ struct acpi_gpio_event *event;
+
+ list_for_each_entry(event, &achip->events, node) {
+ if (event->pin == pin) {
+ desc = event->desc;
+ found = true;
+ break;
+ }
+ }
+ }
+
if (!found) {
desc = gpiochip_request_own_desc(chip, pin,
"ACPI:OpRegion");
@@ -687,6 +802,7 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
}
acpi_gpio->chip = chip;
+ INIT_LIST_HEAD(&acpi_gpio->events);
status = acpi_attach_data(handle, acpi_gpio_chip_dh, acpi_gpio);
if (ACPI_FAILURE(status)) {
diff --git a/kernel/drivers/gpio/gpiolib-legacy.c b/kernel/drivers/gpio/gpiolib-legacy.c
index 8b830996f..3a5c7011a 100644
--- a/kernel/drivers/gpio/gpiolib-legacy.c
+++ b/kernel/drivers/gpio/gpiolib-legacy.c
@@ -28,10 +28,6 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
if (!desc && gpio_is_valid(gpio))
return -EPROBE_DEFER;
- err = gpiod_request(desc, label);
- if (err)
- return err;
-
if (flags & GPIOF_OPEN_DRAIN)
set_bit(FLAG_OPEN_DRAIN, &desc->flags);
@@ -41,6 +37,10 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
if (flags & GPIOF_ACTIVE_LOW)
set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+ err = gpiod_request(desc, label);
+ if (err)
+ return err;
+
if (flags & GPIOF_DIR_IN)
err = gpiod_direction_input(desc);
else
diff --git a/kernel/drivers/gpio/gpiolib-of.c b/kernel/drivers/gpio/gpiolib-of.c
index a6c67c6b4..5fe34a9df 100644
--- a/kernel/drivers/gpio/gpiolib-of.c
+++ b/kernel/drivers/gpio/gpiolib-of.c
@@ -119,24 +119,23 @@ int of_get_named_gpio_flags(struct device_node *np, const char *list_name,
EXPORT_SYMBOL(of_get_named_gpio_flags);
/**
- * of_get_gpio_hog() - Get a GPIO hog descriptor, names and flags for GPIO API
+ * of_parse_own_gpio() - Get a GPIO hog descriptor, names and flags for GPIO API
* @np: device node to get GPIO from
* @name: GPIO line name
* @lflags: gpio_lookup_flags - returned from of_find_gpio() or
- * of_get_gpio_hog()
+ * of_parse_own_gpio()
* @dflags: gpiod_flags - optional GPIO initialization flags
*
* Returns GPIO descriptor to use with Linux GPIO API, or one of the errno
* value on the error condition.
*/
-static struct gpio_desc *of_get_gpio_hog(struct device_node *np,
- const char **name,
- enum gpio_lookup_flags *lflags,
- enum gpiod_flags *dflags)
+static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
+ const char **name,
+ enum gpio_lookup_flags *lflags,
+ enum gpiod_flags *dflags)
{
struct device_node *chip_np;
enum of_gpio_flags xlate_flags;
- struct gpio_desc *desc;
struct gg_data gg_data = {
.flags = &xlate_flags,
};
@@ -193,19 +192,17 @@ static struct gpio_desc *of_get_gpio_hog(struct device_node *np,
if (name && of_property_read_string(np, "line-name", name))
*name = np->name;
- desc = gg_data.out_gpio;
-
- return desc;
+ return gg_data.out_gpio;
}
/**
- * of_gpiochip_scan_hogs - Scan gpio-controller and apply GPIO hog as requested
+ * of_gpiochip_scan_gpios - Scan gpio-controller for gpio definitions
* @chip: gpio chip to act on
*
* This is only used by of_gpiochip_add to request/set GPIO initial
* configuration.
*/
-static void of_gpiochip_scan_hogs(struct gpio_chip *chip)
+static void of_gpiochip_scan_gpios(struct gpio_chip *chip)
{
struct gpio_desc *desc = NULL;
struct device_node *np;
@@ -217,7 +214,7 @@ static void of_gpiochip_scan_hogs(struct gpio_chip *chip)
if (!of_property_read_bool(np, "gpio-hog"))
continue;
- desc = of_get_gpio_hog(np, &name, &lflags, &dflags);
+ desc = of_parse_own_gpio(np, &name, &lflags, &dflags);
if (IS_ERR(desc))
continue;
@@ -242,7 +239,7 @@ int of_gpio_simple_xlate(struct gpio_chip *gc,
{
/*
* We're discouraging gpio_cells < 2, since that way you'll have to
- * write your own xlate function (that will have to retrive the GPIO
+ * write your own xlate function (that will have to retrieve the GPIO
* number and the flags from a single gpio cell -- this is possible,
* but not recommended).
*/
@@ -338,7 +335,7 @@ void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc)
EXPORT_SYMBOL(of_mm_gpiochip_remove);
#ifdef CONFIG_PINCTRL
-static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
+static int of_gpiochip_add_pin_range(struct gpio_chip *chip)
{
struct device_node *np = chip->of_node;
struct of_phandle_args pinspec;
@@ -349,7 +346,7 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
struct property *group_names;
if (!np)
- return;
+ return 0;
group_names = of_find_property(np, group_names_propname, NULL);
@@ -361,11 +358,11 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
pctldev = of_pinctrl_get(pinspec.np);
if (!pctldev)
- break;
+ return -EPROBE_DEFER;
if (pinspec.args[2]) {
if (group_names) {
- ret = of_property_read_string_index(np,
+ of_property_read_string_index(np,
group_names_propname,
index, &name);
if (strlen(name)) {
@@ -381,7 +378,7 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
pinspec.args[1],
pinspec.args[2]);
if (ret)
- break;
+ return ret;
} else {
/* npins == 0: special range */
if (pinspec.args[1]) {
@@ -411,32 +408,41 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
ret = gpiochip_add_pingroup_range(chip, pctldev,
pinspec.args[0], name);
if (ret)
- break;
+ return ret;
}
}
+
+ return 0;
}
#else
-static void of_gpiochip_add_pin_range(struct gpio_chip *chip) {}
+static int of_gpiochip_add_pin_range(struct gpio_chip *chip) { return 0; }
#endif
-void of_gpiochip_add(struct gpio_chip *chip)
+int of_gpiochip_add(struct gpio_chip *chip)
{
+ int status;
+
if ((!chip->of_node) && (chip->dev))
chip->of_node = chip->dev->of_node;
if (!chip->of_node)
- return;
+ return 0;
if (!chip->of_xlate) {
chip->of_gpio_n_cells = 2;
chip->of_xlate = of_gpio_simple_xlate;
}
- of_gpiochip_add_pin_range(chip);
+ status = of_gpiochip_add_pin_range(chip);
+ if (status)
+ return status;
+
of_node_get(chip->of_node);
- of_gpiochip_scan_hogs(chip);
+ of_gpiochip_scan_gpios(chip);
+
+ return 0;
}
void of_gpiochip_remove(struct gpio_chip *chip)
diff --git a/kernel/drivers/gpio/gpiolib-sysfs.c b/kernel/drivers/gpio/gpiolib-sysfs.c
index af3bc7a80..b57ed8e55 100644
--- a/kernel/drivers/gpio/gpiolib-sysfs.c
+++ b/kernel/drivers/gpio/gpiolib-sysfs.c
@@ -6,14 +6,29 @@
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/kdev_t.h>
+#include <linux/slab.h>
#include "gpiolib.h"
-static DEFINE_IDR(dirent_idr);
+#define GPIO_IRQF_TRIGGER_FALLING BIT(0)
+#define GPIO_IRQF_TRIGGER_RISING BIT(1)
+#define GPIO_IRQF_TRIGGER_BOTH (GPIO_IRQF_TRIGGER_FALLING | \
+ GPIO_IRQF_TRIGGER_RISING)
+struct gpiod_data {
+ struct gpio_desc *desc;
+
+ struct mutex mutex;
+ struct kernfs_node *value_kn;
+ int irq;
+ unsigned char irq_flags;
-/* lock protects against unexport_gpio() being called while
- * sysfs files are active.
+ bool direction_can_change;
+};
+
+/*
+ * Lock to serialise gpiod export and unexport, and prevent re-export of
+ * gpiod whose chip is being unregistered.
*/
static DEFINE_MUTEX(sysfs_lock);
@@ -38,38 +53,35 @@ static DEFINE_MUTEX(sysfs_lock);
* /edge configuration
*/
-static ssize_t gpio_direction_show(struct device *dev,
+static ssize_t direction_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
ssize_t status;
- mutex_lock(&sysfs_lock);
+ mutex_lock(&data->mutex);
- if (!test_bit(FLAG_EXPORT, &desc->flags)) {
- status = -EIO;
- } else {
- gpiod_get_direction(desc);
- status = sprintf(buf, "%s\n",
+ gpiod_get_direction(desc);
+ status = sprintf(buf, "%s\n",
test_bit(FLAG_IS_OUT, &desc->flags)
? "out" : "in");
- }
- mutex_unlock(&sysfs_lock);
+ mutex_unlock(&data->mutex);
+
return status;
}
-static ssize_t gpio_direction_store(struct device *dev,
+static ssize_t direction_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
- struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
ssize_t status;
- mutex_lock(&sysfs_lock);
+ mutex_lock(&data->mutex);
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else if (sysfs_streq(buf, "high"))
+ if (sysfs_streq(buf, "high"))
status = gpiod_direction_output_raw(desc, 1);
else if (sysfs_streq(buf, "out") || sysfs_streq(buf, "low"))
status = gpiod_direction_output_raw(desc, 0);
@@ -78,43 +90,40 @@ static ssize_t gpio_direction_store(struct device *dev,
else
status = -EINVAL;
- mutex_unlock(&sysfs_lock);
+ mutex_unlock(&data->mutex);
+
return status ? : size;
}
+static DEVICE_ATTR_RW(direction);
-static /* const */ DEVICE_ATTR(direction, 0644,
- gpio_direction_show, gpio_direction_store);
-
-static ssize_t gpio_value_show(struct device *dev,
+static ssize_t value_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
ssize_t status;
- mutex_lock(&sysfs_lock);
+ mutex_lock(&data->mutex);
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else
- status = sprintf(buf, "%d\n", gpiod_get_value_cansleep(desc));
+ status = sprintf(buf, "%d\n", gpiod_get_value_cansleep(desc));
+
+ mutex_unlock(&data->mutex);
- mutex_unlock(&sysfs_lock);
return status;
}
-static ssize_t gpio_value_store(struct device *dev,
+static ssize_t value_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
- struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
ssize_t status;
- mutex_lock(&sysfs_lock);
+ mutex_lock(&data->mutex);
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else if (!test_bit(FLAG_IS_OUT, &desc->flags))
+ if (!test_bit(FLAG_IS_OUT, &desc->flags)) {
status = -EPERM;
- else {
+ } else {
long value;
status = kstrtol(buf, 0, &value);
@@ -124,172 +133,168 @@ static ssize_t gpio_value_store(struct device *dev,
}
}
- mutex_unlock(&sysfs_lock);
+ mutex_unlock(&data->mutex);
+
return status;
}
-
-static DEVICE_ATTR(value, 0644,
- gpio_value_show, gpio_value_store);
+static DEVICE_ATTR_RW(value);
static irqreturn_t gpio_sysfs_irq(int irq, void *priv)
{
- struct kernfs_node *value_sd = priv;
+ struct gpiod_data *data = priv;
+
+ sysfs_notify_dirent(data->value_kn);
- sysfs_notify_dirent(value_sd);
return IRQ_HANDLED;
}
-static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
- unsigned long gpio_flags)
+/* Caller holds gpiod-data mutex. */
+static int gpio_sysfs_request_irq(struct device *dev, unsigned char flags)
{
- struct kernfs_node *value_sd;
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
unsigned long irq_flags;
- int ret, irq, id;
+ int ret;
- if ((desc->flags & GPIO_TRIGGER_MASK) == gpio_flags)
- return 0;
-
- irq = gpiod_to_irq(desc);
- if (irq < 0)
+ data->irq = gpiod_to_irq(desc);
+ if (data->irq < 0)
return -EIO;
- id = desc->flags >> ID_SHIFT;
- value_sd = idr_find(&dirent_idr, id);
- if (value_sd)
- free_irq(irq, value_sd);
-
- desc->flags &= ~GPIO_TRIGGER_MASK;
-
- if (!gpio_flags) {
- gpiochip_unlock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
- ret = 0;
- goto free_id;
- }
+ data->value_kn = sysfs_get_dirent(dev->kobj.sd, "value");
+ if (!data->value_kn)
+ return -ENODEV;
irq_flags = IRQF_SHARED;
- if (test_bit(FLAG_TRIG_FALL, &gpio_flags))
+ if (flags & GPIO_IRQF_TRIGGER_FALLING)
irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
- if (test_bit(FLAG_TRIG_RISE, &gpio_flags))
+ if (flags & GPIO_IRQF_TRIGGER_RISING)
irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
- if (!value_sd) {
- value_sd = sysfs_get_dirent(dev->kobj.sd, "value");
- if (!value_sd) {
- ret = -ENODEV;
- goto err_out;
- }
-
- ret = idr_alloc(&dirent_idr, value_sd, 1, 0, GFP_KERNEL);
- if (ret < 0)
- goto free_sd;
- id = ret;
-
- desc->flags &= GPIO_FLAGS_MASK;
- desc->flags |= (unsigned long)id << ID_SHIFT;
-
- if (desc->flags >> ID_SHIFT != id) {
- ret = -ERANGE;
- goto free_id;
- }
- }
+ /*
+ * FIXME: This should be done in the irq_request_resources callback
+ * when the irq is requested, but a few drivers currently fail
+ * to do so.
+ *
+ * Remove this redundant call (along with the corresponding
+ * unlock) when those drivers have been fixed.
+ */
+ ret = gpiochip_lock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
+ if (ret < 0)
+ goto err_put_kn;
- ret = request_any_context_irq(irq, gpio_sysfs_irq, irq_flags,
- "gpiolib", value_sd);
+ ret = request_any_context_irq(data->irq, gpio_sysfs_irq, irq_flags,
+ "gpiolib", data);
if (ret < 0)
- goto free_id;
+ goto err_unlock;
- ret = gpiochip_lock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
- if (ret < 0) {
- gpiod_warn(desc, "failed to flag the GPIO for IRQ\n");
- goto free_id;
- }
+ data->irq_flags = flags;
- desc->flags |= gpio_flags;
return 0;
-free_id:
- idr_remove(&dirent_idr, id);
- desc->flags &= GPIO_FLAGS_MASK;
-free_sd:
- if (value_sd)
- sysfs_put(value_sd);
-err_out:
+err_unlock:
+ gpiochip_unlock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
+err_put_kn:
+ sysfs_put(data->value_kn);
+
return ret;
}
+/*
+ * Caller holds gpiod-data mutex (unless called after class-device
+ * deregistration).
+ */
+static void gpio_sysfs_free_irq(struct device *dev)
+{
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
+
+ data->irq_flags = 0;
+ free_irq(data->irq, data);
+ gpiochip_unlock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
+ sysfs_put(data->value_kn);
+}
+
static const struct {
const char *name;
- unsigned long flags;
+ unsigned char flags;
} trigger_types[] = {
{ "none", 0 },
- { "falling", BIT(FLAG_TRIG_FALL) },
- { "rising", BIT(FLAG_TRIG_RISE) },
- { "both", BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE) },
+ { "falling", GPIO_IRQF_TRIGGER_FALLING },
+ { "rising", GPIO_IRQF_TRIGGER_RISING },
+ { "both", GPIO_IRQF_TRIGGER_BOTH },
};
-static ssize_t gpio_edge_show(struct device *dev,
+static ssize_t edge_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ ssize_t status = 0;
+ int i;
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else {
- int i;
+ mutex_lock(&data->mutex);
- status = 0;
- for (i = 0; i < ARRAY_SIZE(trigger_types); i++)
- if ((desc->flags & GPIO_TRIGGER_MASK)
- == trigger_types[i].flags) {
- status = sprintf(buf, "%s\n",
- trigger_types[i].name);
- break;
- }
+ for (i = 0; i < ARRAY_SIZE(trigger_types); i++) {
+ if (data->irq_flags == trigger_types[i].flags) {
+ status = sprintf(buf, "%s\n", trigger_types[i].name);
+ break;
+ }
}
- mutex_unlock(&sysfs_lock);
+ mutex_unlock(&data->mutex);
+
return status;
}
-static ssize_t gpio_edge_store(struct device *dev,
+static ssize_t edge_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
- struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
- int i;
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ unsigned char flags;
+ ssize_t status = size;
+ int i;
- for (i = 0; i < ARRAY_SIZE(trigger_types); i++)
+ for (i = 0; i < ARRAY_SIZE(trigger_types); i++) {
if (sysfs_streq(trigger_types[i].name, buf))
- goto found;
- return -EINVAL;
+ break;
+ }
-found:
- mutex_lock(&sysfs_lock);
+ if (i == ARRAY_SIZE(trigger_types))
+ return -EINVAL;
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else {
- status = gpio_setup_irq(desc, dev, trigger_types[i].flags);
+ flags = trigger_types[i].flags;
+
+ mutex_lock(&data->mutex);
+
+ if (flags == data->irq_flags) {
+ status = size;
+ goto out_unlock;
+ }
+
+ if (data->irq_flags)
+ gpio_sysfs_free_irq(dev);
+
+ if (flags) {
+ status = gpio_sysfs_request_irq(dev, flags);
if (!status)
status = size;
}
- mutex_unlock(&sysfs_lock);
+out_unlock:
+ mutex_unlock(&data->mutex);
return status;
}
+static DEVICE_ATTR_RW(edge);
-static DEVICE_ATTR(edge, 0644, gpio_edge_show, gpio_edge_store);
-
-static int sysfs_set_active_low(struct gpio_desc *desc, struct device *dev,
- int value)
+/* Caller holds gpiod-data mutex. */
+static int gpio_sysfs_set_active_low(struct device *dev, int value)
{
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
int status = 0;
+ unsigned int flags = data->irq_flags;
if (!!test_bit(FLAG_ACTIVE_LOW, &desc->flags) == !!value)
return 0;
@@ -300,69 +305,59 @@ static int sysfs_set_active_low(struct gpio_desc *desc, struct device *dev,
clear_bit(FLAG_ACTIVE_LOW, &desc->flags);
/* reconfigure poll(2) support if enabled on one edge only */
- if (dev != NULL && (!!test_bit(FLAG_TRIG_RISE, &desc->flags) ^
- !!test_bit(FLAG_TRIG_FALL, &desc->flags))) {
- unsigned long trigger_flags = desc->flags & GPIO_TRIGGER_MASK;
-
- gpio_setup_irq(desc, dev, 0);
- status = gpio_setup_irq(desc, dev, trigger_flags);
+ if (flags == GPIO_IRQF_TRIGGER_FALLING ||
+ flags == GPIO_IRQF_TRIGGER_RISING) {
+ gpio_sysfs_free_irq(dev);
+ status = gpio_sysfs_request_irq(dev, flags);
}
return status;
}
-static ssize_t gpio_active_low_show(struct device *dev,
+static ssize_t active_low_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
ssize_t status;
- mutex_lock(&sysfs_lock);
+ mutex_lock(&data->mutex);
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else
- status = sprintf(buf, "%d\n",
+ status = sprintf(buf, "%d\n",
!!test_bit(FLAG_ACTIVE_LOW, &desc->flags));
- mutex_unlock(&sysfs_lock);
+ mutex_unlock(&data->mutex);
return status;
}
-static ssize_t gpio_active_low_store(struct device *dev,
+static ssize_t active_low_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
- struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
ssize_t status;
+ long value;
- mutex_lock(&sysfs_lock);
+ mutex_lock(&data->mutex);
- if (!test_bit(FLAG_EXPORT, &desc->flags)) {
- status = -EIO;
- } else {
- long value;
+ status = kstrtol(buf, 0, &value);
+ if (status == 0)
+ status = gpio_sysfs_set_active_low(dev, value);
- status = kstrtol(buf, 0, &value);
- if (status == 0)
- status = sysfs_set_active_low(desc, dev, value != 0);
- }
-
- mutex_unlock(&sysfs_lock);
+ mutex_unlock(&data->mutex);
return status ? : size;
}
-
-static DEVICE_ATTR(active_low, 0644,
- gpio_active_low_show, gpio_active_low_store);
+static DEVICE_ATTR_RW(active_low);
static umode_t gpio_is_visible(struct kobject *kobj, struct attribute *attr,
int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
- struct gpio_desc *desc = dev_get_drvdata(dev);
+ struct gpiod_data *data = dev_get_drvdata(dev);
+ struct gpio_desc *desc = data->desc;
umode_t mode = attr->mode;
- bool show_direction = test_bit(FLAG_SYSFS_DIR, &desc->flags);
+ bool show_direction = data->direction_can_change;
if (attr == &dev_attr_direction.attr) {
if (!show_direction)
@@ -402,32 +397,32 @@ static const struct attribute_group *gpio_groups[] = {
* /ngpio ... matching gpio_chip.ngpio
*/
-static ssize_t chip_base_show(struct device *dev,
+static ssize_t base_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
const struct gpio_chip *chip = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", chip->base);
}
-static DEVICE_ATTR(base, 0444, chip_base_show, NULL);
+static DEVICE_ATTR_RO(base);
-static ssize_t chip_label_show(struct device *dev,
+static ssize_t label_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
const struct gpio_chip *chip = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", chip->label ? : "");
}
-static DEVICE_ATTR(label, 0444, chip_label_show, NULL);
+static DEVICE_ATTR_RO(label);
-static ssize_t chip_ngpio_show(struct device *dev,
+static ssize_t ngpio_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
const struct gpio_chip *chip = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", chip->ngpio);
}
-static DEVICE_ATTR(ngpio, 0444, chip_ngpio_show, NULL);
+static DEVICE_ATTR_RO(ngpio);
static struct attribute *gpiochip_attrs[] = {
&dev_attr_base.attr,
@@ -552,6 +547,7 @@ static struct class gpio_class = {
int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
{
struct gpio_chip *chip;
+ struct gpiod_data *data;
unsigned long flags;
int status;
const char *ioname = NULL;
@@ -574,9 +570,9 @@ int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
mutex_lock(&sysfs_lock);
/* check if chip is being removed */
- if (!chip || !chip->exported) {
+ if (!chip || !chip->cdev) {
status = -ENODEV;
- goto fail_unlock;
+ goto err_unlock;
}
spin_lock_irqsave(&gpio_lock, flags);
@@ -588,43 +584,54 @@ int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
test_bit(FLAG_REQUESTED, &desc->flags),
test_bit(FLAG_EXPORT, &desc->flags));
status = -EPERM;
- goto fail_unlock;
+ goto err_unlock;
}
+ spin_unlock_irqrestore(&gpio_lock, flags);
- if (desc->chip->direction_input && desc->chip->direction_output &&
- direction_may_change) {
- set_bit(FLAG_SYSFS_DIR, &desc->flags);
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ status = -ENOMEM;
+ goto err_unlock;
}
- spin_unlock_irqrestore(&gpio_lock, flags);
+ data->desc = desc;
+ mutex_init(&data->mutex);
+ if (chip->direction_input && chip->direction_output)
+ data->direction_can_change = direction_may_change;
+ else
+ data->direction_can_change = false;
offset = gpio_chip_hwgpio(desc);
- if (desc->chip->names && desc->chip->names[offset])
- ioname = desc->chip->names[offset];
+ if (chip->names && chip->names[offset])
+ ioname = chip->names[offset];
- dev = device_create_with_groups(&gpio_class, desc->chip->dev,
- MKDEV(0, 0), desc, gpio_groups,
+ dev = device_create_with_groups(&gpio_class, chip->dev,
+ MKDEV(0, 0), data, gpio_groups,
ioname ? ioname : "gpio%u",
desc_to_gpio(desc));
if (IS_ERR(dev)) {
status = PTR_ERR(dev);
- goto fail_unlock;
+ goto err_free_data;
}
set_bit(FLAG_EXPORT, &desc->flags);
mutex_unlock(&sysfs_lock);
return 0;
-fail_unlock:
+err_free_data:
+ kfree(data);
+err_unlock:
mutex_unlock(&sysfs_lock);
gpiod_dbg(desc, "%s: status %d\n", __func__, status);
return status;
}
EXPORT_SYMBOL_GPL(gpiod_export);
-static int match_export(struct device *dev, const void *data)
+static int match_export(struct device *dev, const void *desc)
{
- return dev_get_drvdata(dev) == data;
+ struct gpiod_data *data = dev_get_drvdata(dev);
+
+ return data->desc == desc;
}
/**
@@ -641,82 +648,26 @@ static int match_export(struct device *dev, const void *data)
int gpiod_export_link(struct device *dev, const char *name,
struct gpio_desc *desc)
{
- int status = -EINVAL;
+ struct device *cdev;
+ int ret;
if (!desc) {
pr_warn("%s: invalid GPIO\n", __func__);
return -EINVAL;
}
- mutex_lock(&sysfs_lock);
-
- if (test_bit(FLAG_EXPORT, &desc->flags)) {
- struct device *tdev;
-
- tdev = class_find_device(&gpio_class, NULL, desc, match_export);
- if (tdev != NULL) {
- status = sysfs_create_link(&dev->kobj, &tdev->kobj,
- name);
- put_device(tdev);
- } else {
- status = -ENODEV;
- }
- }
-
- mutex_unlock(&sysfs_lock);
+ cdev = class_find_device(&gpio_class, NULL, desc, match_export);
+ if (!cdev)
+ return -ENODEV;
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+ ret = sysfs_create_link(&dev->kobj, &cdev->kobj, name);
+ put_device(cdev);
- return status;
+ return ret;
}
EXPORT_SYMBOL_GPL(gpiod_export_link);
/**
- * gpiod_sysfs_set_active_low - set the polarity of gpio sysfs value
- * @gpio: gpio to change
- * @value: non-zero to use active low, i.e. inverted values
- *
- * Set the polarity of /sys/class/gpio/gpioN/value sysfs attribute.
- * The GPIO does not have to be exported yet. If poll(2) support has
- * been enabled for either rising or falling edge, it will be
- * reconfigured to follow the new polarity.
- *
- * Returns zero on success, else an error.
- */
-int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
-{
- struct device *dev = NULL;
- int status = -EINVAL;
-
- if (!desc) {
- pr_warn("%s: invalid GPIO\n", __func__);
- return -EINVAL;
- }
-
- mutex_lock(&sysfs_lock);
-
- if (test_bit(FLAG_EXPORT, &desc->flags)) {
- dev = class_find_device(&gpio_class, NULL, desc, match_export);
- if (dev == NULL) {
- status = -ENODEV;
- goto unlock;
- }
- }
-
- status = sysfs_set_active_low(desc, dev, value);
- put_device(dev);
-unlock:
- mutex_unlock(&sysfs_lock);
-
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
-
- return status;
-}
-EXPORT_SYMBOL_GPL(gpiod_sysfs_set_active_low);
-
-/**
* gpiod_unexport - reverse effect of gpio_export()
* @gpio: gpio to make unavailable
*
@@ -724,8 +675,8 @@ EXPORT_SYMBOL_GPL(gpiod_sysfs_set_active_low);
*/
void gpiod_unexport(struct gpio_desc *desc)
{
- int status = 0;
- struct device *dev = NULL;
+ struct gpiod_data *data;
+ struct device *dev;
if (!desc) {
pr_warn("%s: invalid GPIO\n", __func__);
@@ -734,82 +685,79 @@ void gpiod_unexport(struct gpio_desc *desc)
mutex_lock(&sysfs_lock);
- if (test_bit(FLAG_EXPORT, &desc->flags)) {
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ goto err_unlock;
- dev = class_find_device(&gpio_class, NULL, desc, match_export);
- if (dev) {
- gpio_setup_irq(desc, dev, 0);
- clear_bit(FLAG_SYSFS_DIR, &desc->flags);
- clear_bit(FLAG_EXPORT, &desc->flags);
- } else
- status = -ENODEV;
- }
+ dev = class_find_device(&gpio_class, NULL, desc, match_export);
+ if (!dev)
+ goto err_unlock;
+
+ data = dev_get_drvdata(dev);
+
+ clear_bit(FLAG_EXPORT, &desc->flags);
+
+ device_unregister(dev);
+
+ /*
+ * Release irq after deregistration to prevent race with edge_store.
+ */
+ if (data->irq_flags)
+ gpio_sysfs_free_irq(dev);
mutex_unlock(&sysfs_lock);
- if (dev) {
- device_unregister(dev);
- put_device(dev);
- }
+ put_device(dev);
+ kfree(data);
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+ return;
+
+err_unlock:
+ mutex_unlock(&sysfs_lock);
}
EXPORT_SYMBOL_GPL(gpiod_unexport);
-int gpiochip_export(struct gpio_chip *chip)
+int gpiochip_sysfs_register(struct gpio_chip *chip)
{
- int status;
struct device *dev;
- /* Many systems register gpio chips for SOC support very early,
+ /*
+ * Many systems add gpio chips for SOC support very early,
* before driver model support is available. In those cases we
- * export this later, in gpiolib_sysfs_init() ... here we just
+ * register later, in gpiolib_sysfs_init() ... here we just
* verify that _some_ field of gpio_class got initialized.
*/
if (!gpio_class.p)
return 0;
/* use chip->base for the ID; it's already known to be unique */
- mutex_lock(&sysfs_lock);
dev = device_create_with_groups(&gpio_class, chip->dev, MKDEV(0, 0),
chip, gpiochip_groups,
"gpiochip%d", chip->base);
if (IS_ERR(dev))
- status = PTR_ERR(dev);
- else
- status = 0;
- chip->exported = (status == 0);
- mutex_unlock(&sysfs_lock);
+ return PTR_ERR(dev);
- if (status)
- chip_dbg(chip, "%s: status %d\n", __func__, status);
+ mutex_lock(&sysfs_lock);
+ chip->cdev = dev;
+ mutex_unlock(&sysfs_lock);
- return status;
+ return 0;
}
-void gpiochip_unexport(struct gpio_chip *chip)
+void gpiochip_sysfs_unregister(struct gpio_chip *chip)
{
- int status;
- struct device *dev;
struct gpio_desc *desc;
unsigned int i;
+ if (!chip->cdev)
+ return;
+
+ device_unregister(chip->cdev);
+
+ /* prevent further gpiod exports */
mutex_lock(&sysfs_lock);
- dev = class_find_device(&gpio_class, NULL, chip, match_export);
- if (dev) {
- put_device(dev);
- device_unregister(dev);
- /* prevent further gpiod exports */
- chip->exported = false;
- status = 0;
- } else
- status = -ENODEV;
+ chip->cdev = NULL;
mutex_unlock(&sysfs_lock);
- if (status)
- chip_dbg(chip, "%s: status %d\n", __func__, status);
-
/* unregister gpiod class devices owned by sysfs */
for (i = 0; i < chip->ngpio; i++) {
desc = &chip->desc[i];
@@ -836,19 +784,20 @@ static int __init gpiolib_sysfs_init(void)
*/
spin_lock_irqsave(&gpio_lock, flags);
list_for_each_entry(chip, &gpio_chips, list) {
- if (chip->exported)
+ if (chip->cdev)
continue;
/*
- * TODO we yield gpio_lock here because gpiochip_export()
- * acquires a mutex. This is unsafe and needs to be fixed.
+ * TODO we yield gpio_lock here because
+ * gpiochip_sysfs_register() acquires a mutex. This is unsafe
+ * and needs to be fixed.
*
* Also it would be nice to use gpiochip_find() here so we
* can keep gpio_chips local to gpiolib.c, but the yield of
* gpio_lock prevents us from doing this.
*/
spin_unlock_irqrestore(&gpio_lock, flags);
- status = gpiochip_export(chip);
+ status = gpiochip_sysfs_register(chip);
spin_lock_irqsave(&gpio_lock, flags);
}
spin_unlock_irqrestore(&gpio_lock, flags);
diff --git a/kernel/drivers/gpio/gpiolib.c b/kernel/drivers/gpio/gpiolib.c
index 6bc612b8a..4e4c3083a 100644
--- a/kernel/drivers/gpio/gpiolib.c
+++ b/kernel/drivers/gpio/gpiolib.c
@@ -15,6 +15,7 @@
#include <linux/acpi.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
+#include <linux/pinctrl/consumer.h>
#include "gpiolib.h"
@@ -47,8 +48,6 @@
*/
DEFINE_SPINLOCK(gpio_lock);
-#define GPIO_OFFSET_VALID(chip, offset) (offset >= 0 && offset < chip->ngpio)
-
static DEFINE_MUTEX(gpio_lookup_lock);
static LIST_HEAD(gpio_lookup_list);
LIST_HEAD(gpio_chips);
@@ -190,7 +189,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_direction);
*/
static int gpiochip_add_to_list(struct gpio_chip *chip)
{
- struct list_head *pos = &gpio_chips;
+ struct list_head *pos;
struct gpio_chip *_chip;
int err = 0;
@@ -219,6 +218,68 @@ static int gpiochip_add_to_list(struct gpio_chip *chip)
}
/**
+ * Convert a GPIO name to its descriptor
+ */
+static struct gpio_desc *gpio_name_to_desc(const char * const name)
+{
+ struct gpio_chip *chip;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ list_for_each_entry(chip, &gpio_chips, list) {
+ int i;
+
+ for (i = 0; i != chip->ngpio; ++i) {
+ struct gpio_desc *gpio = &chip->desc[i];
+
+ if (!gpio->name || !name)
+ continue;
+
+ if (!strcmp(gpio->name, name)) {
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return gpio;
+ }
+ }
+ }
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+ return NULL;
+}
+
+/*
+ * Takes the names from gc->names and checks if they are all unique. If they
+ * are, they are assigned to their gpio descriptors.
+ *
+ * Returns -EEXIST if one of the names is already used for a different GPIO.
+ */
+static int gpiochip_set_desc_names(struct gpio_chip *gc)
+{
+ int i;
+
+ if (!gc->names)
+ return 0;
+
+ /* First check all names if they are unique */
+ for (i = 0; i != gc->ngpio; ++i) {
+ struct gpio_desc *gpio;
+
+ gpio = gpio_name_to_desc(gc->names[i]);
+ if (gpio)
+ dev_warn(gc->dev, "Detected name collision for "
+ "GPIO name '%s'\n",
+ gc->names[i]);
+ }
+
+ /* Then add all names to the GPIO descriptors */
+ for (i = 0; i != gc->ngpio; ++i)
+ gc->desc[i].name = gc->names[i];
+
+ return 0;
+}
+
+/**
* gpiochip_add() - register a gpio_chip
* @chip: the chip to register, with chip->base initialized
* Context: potentially before irqs will work
@@ -287,10 +348,20 @@ int gpiochip_add(struct gpio_chip *chip)
INIT_LIST_HEAD(&chip->pin_ranges);
#endif
- of_gpiochip_add(chip);
+ if (!chip->owner && chip->dev && chip->dev->driver)
+ chip->owner = chip->dev->driver->owner;
+
+ status = gpiochip_set_desc_names(chip);
+ if (status)
+ goto err_remove_from_list;
+
+ status = of_gpiochip_add(chip);
+ if (status)
+ goto err_remove_chip;
+
acpi_gpiochip_add(chip);
- status = gpiochip_export(chip);
+ status = gpiochip_sysfs_register(chip);
if (status)
goto err_remove_chip;
@@ -304,6 +375,7 @@ err_remove_chip:
acpi_gpiochip_remove(chip);
gpiochip_free_hogs(chip);
of_gpiochip_remove(chip);
+err_remove_from_list:
spin_lock_irqsave(&gpio_lock, flags);
list_del(&chip->list);
spin_unlock_irqrestore(&gpio_lock, flags);
@@ -327,10 +399,12 @@ EXPORT_SYMBOL_GPL(gpiochip_add);
*/
void gpiochip_remove(struct gpio_chip *chip)
{
+ struct gpio_desc *desc;
unsigned long flags;
unsigned id;
+ bool requested = false;
- gpiochip_unexport(chip);
+ gpiochip_sysfs_unregister(chip);
gpiochip_irqchip_remove(chip);
@@ -341,15 +415,17 @@ void gpiochip_remove(struct gpio_chip *chip)
spin_lock_irqsave(&gpio_lock, flags);
for (id = 0; id < chip->ngpio; id++) {
- if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags))
- dev_crit(chip->dev, "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n");
+ desc = &chip->desc[id];
+ desc->chip = NULL;
+ if (test_bit(FLAG_REQUESTED, &desc->flags))
+ requested = true;
}
- for (id = 0; id < chip->ngpio; id++)
- chip->desc[id].chip = NULL;
-
list_del(&chip->list);
spin_unlock_irqrestore(&gpio_lock, flags);
+ if (requested)
+ dev_crit(chip->dev, "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n");
+
kfree(chip->desc);
chip->desc = NULL;
}
@@ -439,8 +515,10 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
* The parent irqchip is already using the chip_data for this
* irqchip, so our callbacks simply use the handler_data.
*/
- irq_set_handler_data(parent_irq, gpiochip);
- irq_set_chained_handler(parent_irq, parent_handler);
+ irq_set_chained_handler_and_data(parent_irq, parent_handler,
+ gpiochip);
+
+ gpiochip->irq_parent = parent_irq;
}
/* Set the parent IRQ for all affected IRQs */
@@ -450,12 +528,6 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
}
EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip);
-/*
- * This lock class tells lockdep that GPIO irqs are in a different
- * category than their parents, so it won't report false recursion.
- */
-static struct lock_class_key gpiochip_irq_lock_class;
-
/**
* gpiochip_irq_map() - maps an IRQ into a GPIO irqchip
* @d: the irqdomain used by this irqchip
@@ -472,16 +544,17 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
struct gpio_chip *chip = d->host_data;
irq_set_chip_data(irq, chip);
- irq_set_lockdep_class(irq, &gpiochip_irq_lock_class);
+ /*
+ * This lock class tells lockdep that GPIO irqs are in a different
+ * category than their parents, so it won't report false recursion.
+ */
+ irq_set_lockdep_class(irq, chip->lock_key);
irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
/* Chips that can sleep need nested thread handlers */
if (chip->can_sleep && !chip->irq_not_threaded)
irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
irq_set_noprobe(irq);
-#endif
+
/*
* No set-up of the hardware will happen if IRQ_TYPE_NONE
* is passed as default type.
@@ -496,9 +569,6 @@ static void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq)
{
struct gpio_chip *chip = d->host_data;
-#ifdef CONFIG_ARM
- set_irq_flags(irq, 0);
-#endif
if (chip->can_sleep)
irq_set_nested_thread(irq, 0);
irq_set_chip_and_handler(irq, NULL, NULL);
@@ -516,10 +586,14 @@ static int gpiochip_irq_reqres(struct irq_data *d)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
+ if (!try_module_get(chip->owner))
+ return -ENODEV;
+
if (gpiochip_lock_as_irq(chip, d->hwirq)) {
chip_err(chip,
"unable to lock HW IRQ %lu for IRQ\n",
d->hwirq);
+ module_put(chip->owner);
return -EINVAL;
}
return 0;
@@ -530,6 +604,7 @@ static void gpiochip_irq_relres(struct irq_data *d)
struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
gpiochip_unlock_as_irq(chip, d->hwirq);
+ module_put(chip->owner);
}
static int gpiochip_to_irq(struct gpio_chip *chip, unsigned offset)
@@ -549,6 +624,11 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
acpi_gpiochip_free_interrupts(gpiochip);
+ if (gpiochip->irq_parent) {
+ irq_set_chained_handler(gpiochip->irq_parent, NULL);
+ irq_set_handler_data(gpiochip->irq_parent, NULL);
+ }
+
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irqdomain) {
for (offset = 0; offset < gpiochip->ngpio; offset++)
@@ -573,6 +653,7 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
* @handler: the irq handler to use (often a predefined irq core function)
* @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE
* to have the core avoid setting up any default type in the hardware.
+ * @lock_key: lockdep class
*
* This function closely associates a certain irqchip with a certain
* gpiochip, providing an irq domain to translate the local IRQs to
@@ -588,11 +669,12 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
* the pins on the gpiochip can generate a unique IRQ. Everything else
* need to be open coded.
*/
-int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
- struct irq_chip *irqchip,
- unsigned int first_irq,
- irq_flow_handler_t handler,
- unsigned int type)
+int _gpiochip_irqchip_add(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type,
+ struct lock_class_key *lock_key)
{
struct device_node *of_node;
unsigned int offset;
@@ -608,7 +690,7 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
of_node = gpiochip->dev->of_node;
#ifdef CONFIG_OF_GPIO
/*
- * If the gpiochip has an assigned OF node this takes precendence
+ * If the gpiochip has an assigned OF node this takes precedence
* FIXME: get rid of this and use gpiochip->dev->of_node everywhere
*/
if (gpiochip->of_node)
@@ -618,6 +700,7 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
gpiochip->irq_handler = handler;
gpiochip->irq_default_type = type;
gpiochip->to_irq = gpiochip_to_irq;
+ gpiochip->lock_key = lock_key;
gpiochip->irqdomain = irq_domain_add_simple(of_node,
gpiochip->ngpio, first_irq,
&gpiochip_domain_ops, gpiochip);
@@ -625,8 +708,16 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
gpiochip->irqchip = NULL;
return -EINVAL;
}
- irqchip->irq_request_resources = gpiochip_irq_reqres;
- irqchip->irq_release_resources = gpiochip_irq_relres;
+
+ /*
+ * It is possible for a driver to override this, but only if the
+ * alternative functions are both implemented.
+ */
+ if (!irqchip->irq_request_resources &&
+ !irqchip->irq_release_resources) {
+ irqchip->irq_request_resources = gpiochip_irq_reqres;
+ irqchip->irq_release_resources = gpiochip_irq_relres;
+ }
/*
* Prepare the mapping since the irqchip shall be orthogonal to
@@ -647,7 +738,7 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
return 0;
}
-EXPORT_SYMBOL_GPL(gpiochip_irqchip_add);
+EXPORT_SYMBOL_GPL(_gpiochip_irqchip_add);
#else /* CONFIG_GPIOLIB_IRQCHIP */
@@ -655,12 +746,34 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) {}
#endif /* CONFIG_GPIOLIB_IRQCHIP */
+/**
+ * gpiochip_generic_request() - request the gpio function for a pin
+ * @chip: the gpiochip owning the GPIO
+ * @offset: the offset of the GPIO to request for GPIO function
+ */
+int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_request_gpio(chip->base + offset);
+}
+EXPORT_SYMBOL_GPL(gpiochip_generic_request);
+
+/**
+ * gpiochip_generic_free() - free the gpio function from a pin
+ * @chip: the gpiochip to request the gpio function for
+ * @offset: the offset of the GPIO to free from GPIO function
+ */
+void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset)
+{
+ pinctrl_free_gpio(chip->base + offset);
+}
+EXPORT_SYMBOL_GPL(gpiochip_generic_free);
+
#ifdef CONFIG_PINCTRL
/**
* gpiochip_add_pingroup_range() - add a range for GPIO <-> pin mapping
* @chip: the gpiochip to add the range for
- * @pinctrl: the dev_name() of the pin controller to map to
+ * @pctldev: the pin controller to map to
* @gpio_offset: the start offset in the current gpio_chip number space
* @pin_group: name of the pin group inside the pin controller
*/
@@ -814,6 +927,14 @@ static int __gpiod_request(struct gpio_desc *desc, const char *label)
spin_lock_irqsave(&gpio_lock, flags);
}
done:
+ if (status < 0) {
+ /* Clear flags that might have been set by the caller before
+ * requesting the GPIO.
+ */
+ clear_bit(FLAG_ACTIVE_LOW, &desc->flags);
+ clear_bit(FLAG_OPEN_DRAIN, &desc->flags);
+ clear_bit(FLAG_OPEN_SOURCE, &desc->flags);
+ }
spin_unlock_irqrestore(&gpio_lock, flags);
return status;
}
@@ -903,7 +1024,7 @@ const char *gpiochip_is_requested(struct gpio_chip *chip, unsigned offset)
{
struct gpio_desc *desc;
- if (!GPIO_OFFSET_VALID(chip, offset))
+ if (offset >= chip->ngpio)
return NULL;
desc = &chip->desc[offset];
@@ -1149,15 +1270,22 @@ EXPORT_SYMBOL_GPL(gpiod_is_active_low);
* that the GPIO was actually requested.
*/
-static bool _gpiod_get_raw_value(const struct gpio_desc *desc)
+static int _gpiod_get_raw_value(const struct gpio_desc *desc)
{
struct gpio_chip *chip;
- bool value;
int offset;
+ int value;
chip = desc->chip;
offset = gpio_chip_hwgpio(desc);
- value = chip->get ? chip->get(chip, offset) : false;
+ value = chip->get ? chip->get(chip, offset) : -EIO;
+ /*
+ * FIXME: fix all drivers to clamp to [0,1] or return negative,
+ * then change this to:
+ * value = value < 0 ? value : !!value;
+ * so we can properly propagate error codes.
+ */
+ value = !!value;
trace_gpio_value(desc_to_gpio(desc), 1, value);
return value;
}
@@ -1167,7 +1295,7 @@ static bool _gpiod_get_raw_value(const struct gpio_desc *desc)
* @desc: gpio whose value will be returned
*
* Return the GPIO's raw value, i.e. the value of the physical line disregarding
- * its ACTIVE_LOW status.
+ * its ACTIVE_LOW status, or negative errno on failure.
*
* This function should be called from contexts where we cannot sleep, and will
* complain if the GPIO chip functions potentially sleep.
@@ -1187,7 +1315,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_raw_value);
* @desc: gpio whose value will be returned
*
* Return the GPIO's logical value, i.e. taking the ACTIVE_LOW status into
- * account.
+ * account, or negative errno on failure.
*
* This function should be called from contexts where we cannot sleep, and will
* complain if the GPIO chip functions potentially sleep.
@@ -1201,6 +1329,9 @@ int gpiod_get_value(const struct gpio_desc *desc)
WARN_ON(desc->chip->can_sleep);
value = _gpiod_get_raw_value(desc);
+ if (value < 0)
+ return value;
+
if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
value = !value;
@@ -1211,7 +1342,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_value);
/*
* _gpio_set_open_drain_value() - Set the open drain gpio's value.
* @desc: gpio descriptor whose state need to be set.
- * @value: Non-zero for setting it HIGH otherise it will set to LOW.
+ * @value: Non-zero for setting it HIGH otherwise it will set to LOW.
*/
static void _gpio_set_open_drain_value(struct gpio_desc *desc, bool value)
{
@@ -1238,7 +1369,7 @@ static void _gpio_set_open_drain_value(struct gpio_desc *desc, bool value)
/*
* _gpio_set_open_source_value() - Set the open source gpio's value.
* @desc: gpio descriptor whose state need to be set.
- * @value: Non-zero for setting it HIGH otherise it will set to LOW.
+ * @value: Non-zero for setting it HIGH otherwise it will set to LOW.
*/
static void _gpio_set_open_source_value(struct gpio_desc *desc, bool value)
{
@@ -1300,17 +1431,16 @@ static void gpio_chip_set_multiple(struct gpio_chip *chip,
continue;
}
/* set outputs if the corresponding mask bit is set */
- if (__test_and_clear_bit(i, mask)) {
+ if (__test_and_clear_bit(i, mask))
chip->set(chip, i, test_bit(i, bits));
- }
}
}
}
-static void gpiod_set_array_priv(bool raw, bool can_sleep,
- unsigned int array_size,
- struct gpio_desc **desc_array,
- int *value_array)
+static void gpiod_set_array_value_priv(bool raw, bool can_sleep,
+ unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
{
int i = 0;
@@ -1320,9 +1450,9 @@ static void gpiod_set_array_priv(bool raw, bool can_sleep,
unsigned long bits[BITS_TO_LONGS(chip->ngpio)];
int count = 0;
- if (!can_sleep) {
+ if (!can_sleep)
WARN_ON(chip->can_sleep);
- }
+
memset(mask, 0, sizeof(mask));
do {
struct gpio_desc *desc = desc_array[i];
@@ -1337,24 +1467,22 @@ static void gpiod_set_array_priv(bool raw, bool can_sleep,
* open drain and open source outputs are set individually
*/
if (test_bit(FLAG_OPEN_DRAIN, &desc->flags)) {
- _gpio_set_open_drain_value(desc,value);
+ _gpio_set_open_drain_value(desc, value);
} else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) {
_gpio_set_open_source_value(desc, value);
} else {
__set_bit(hwgpio, mask);
- if (value) {
+ if (value)
__set_bit(hwgpio, bits);
- } else {
+ else
__clear_bit(hwgpio, bits);
- }
count++;
}
i++;
} while ((i < array_size) && (desc_array[i]->chip == chip));
/* push collected bits to outputs */
- if (count != 0) {
+ if (count != 0)
gpio_chip_set_multiple(chip, mask, bits);
- }
}
}
@@ -1403,7 +1531,7 @@ void gpiod_set_value(struct gpio_desc *desc, int value)
EXPORT_SYMBOL_GPL(gpiod_set_value);
/**
- * gpiod_set_raw_array() - assign values to an array of GPIOs
+ * gpiod_set_raw_array_value() - assign values to an array of GPIOs
* @array_size: number of elements in the descriptor / value arrays
* @desc_array: array of GPIO descriptors whose values will be assigned
* @value_array: array of values to assign
@@ -1414,17 +1542,18 @@ EXPORT_SYMBOL_GPL(gpiod_set_value);
* This function should be called from contexts where we cannot sleep, and will
* complain if the GPIO chip functions potentially sleep.
*/
-void gpiod_set_raw_array(unsigned int array_size,
+void gpiod_set_raw_array_value(unsigned int array_size,
struct gpio_desc **desc_array, int *value_array)
{
if (!desc_array)
return;
- gpiod_set_array_priv(true, false, array_size, desc_array, value_array);
+ gpiod_set_array_value_priv(true, false, array_size, desc_array,
+ value_array);
}
-EXPORT_SYMBOL_GPL(gpiod_set_raw_array);
+EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value);
/**
- * gpiod_set_array() - assign values to an array of GPIOs
+ * gpiod_set_array_value() - assign values to an array of GPIOs
* @array_size: number of elements in the descriptor / value arrays
* @desc_array: array of GPIO descriptors whose values will be assigned
* @value_array: array of values to assign
@@ -1435,14 +1564,15 @@ EXPORT_SYMBOL_GPL(gpiod_set_raw_array);
* This function should be called from contexts where we cannot sleep, and will
* complain if the GPIO chip functions potentially sleep.
*/
-void gpiod_set_array(unsigned int array_size,
- struct gpio_desc **desc_array, int *value_array)
+void gpiod_set_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array, int *value_array)
{
if (!desc_array)
return;
- gpiod_set_array_priv(false, false, array_size, desc_array, value_array);
+ gpiod_set_array_value_priv(false, false, array_size, desc_array,
+ value_array);
}
-EXPORT_SYMBOL_GPL(gpiod_set_array);
+EXPORT_SYMBOL_GPL(gpiod_set_array_value);
/**
* gpiod_cansleep() - report whether gpio value access may sleep
@@ -1524,7 +1654,7 @@ EXPORT_SYMBOL_GPL(gpiochip_unlock_as_irq);
* @desc: gpio whose value will be returned
*
* Return the GPIO's raw value, i.e. the value of the physical line disregarding
- * its ACTIVE_LOW status.
+ * its ACTIVE_LOW status, or negative errno on failure.
*
* This function is to be called from contexts that can sleep.
*/
@@ -1542,7 +1672,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_raw_value_cansleep);
* @desc: gpio whose value will be returned
*
* Return the GPIO's logical value, i.e. taking the ACTIVE_LOW status into
- * account.
+ * account, or negative errno on failure.
*
* This function is to be called from contexts that can sleep.
*/
@@ -1555,6 +1685,9 @@ int gpiod_get_value_cansleep(const struct gpio_desc *desc)
return 0;
value = _gpiod_get_raw_value(desc);
+ if (value < 0)
+ return value;
+
if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
value = !value;
@@ -1604,7 +1737,7 @@ void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
EXPORT_SYMBOL_GPL(gpiod_set_value_cansleep);
/**
- * gpiod_set_raw_array_cansleep() - assign values to an array of GPIOs
+ * gpiod_set_raw_array_value_cansleep() - assign values to an array of GPIOs
* @array_size: number of elements in the descriptor / value arrays
* @desc_array: array of GPIO descriptors whose values will be assigned
* @value_array: array of values to assign
@@ -1614,19 +1747,20 @@ EXPORT_SYMBOL_GPL(gpiod_set_value_cansleep);
*
* This function is to be called from contexts that can sleep.
*/
-void gpiod_set_raw_array_cansleep(unsigned int array_size,
- struct gpio_desc **desc_array,
- int *value_array)
+void gpiod_set_raw_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
{
might_sleep_if(extra_checks);
if (!desc_array)
return;
- gpiod_set_array_priv(true, true, array_size, desc_array, value_array);
+ gpiod_set_array_value_priv(true, true, array_size, desc_array,
+ value_array);
}
-EXPORT_SYMBOL_GPL(gpiod_set_raw_array_cansleep);
+EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value_cansleep);
/**
- * gpiod_set_array_cansleep() - assign values to an array of GPIOs
+ * gpiod_set_array_value_cansleep() - assign values to an array of GPIOs
* @array_size: number of elements in the descriptor / value arrays
* @desc_array: array of GPIO descriptors whose values will be assigned
* @value_array: array of values to assign
@@ -1636,16 +1770,17 @@ EXPORT_SYMBOL_GPL(gpiod_set_raw_array_cansleep);
*
* This function is to be called from contexts that can sleep.
*/
-void gpiod_set_array_cansleep(unsigned int array_size,
- struct gpio_desc **desc_array,
- int *value_array)
+void gpiod_set_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
{
might_sleep_if(extra_checks);
if (!desc_array)
return;
- gpiod_set_array_priv(false, true, array_size, desc_array, value_array);
+ gpiod_set_array_value_priv(false, true, array_size, desc_array,
+ value_array);
}
-EXPORT_SYMBOL_GPL(gpiod_set_array_cansleep);
+EXPORT_SYMBOL_GPL(gpiod_set_array_value_cansleep);
/**
* gpiod_add_lookup_table() - register GPIO device consumers
@@ -1660,6 +1795,19 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table)
mutex_unlock(&gpio_lookup_lock);
}
+/**
+ * gpiod_remove_lookup_table() - unregister GPIO device consumers
+ * @table: table of consumers to unregister
+ */
+void gpiod_remove_lookup_table(struct gpiod_lookup_table *table)
+{
+ mutex_lock(&gpio_lookup_lock);
+
+ list_del(&table->list);
+
+ mutex_unlock(&gpio_lookup_lock);
+}
+
static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
unsigned int idx,
enum gpio_lookup_flags *flags)
@@ -1689,6 +1837,13 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
if (of_flags & OF_GPIO_ACTIVE_LOW)
*flags |= GPIO_ACTIVE_LOW;
+ if (of_flags & OF_GPIO_SINGLE_ENDED) {
+ if (of_flags & OF_GPIO_ACTIVE_LOW)
+ *flags |= GPIO_OPEN_DRAIN;
+ else
+ *flags |= GPIO_OPEN_SOURCE;
+ }
+
return desc;
}
@@ -1880,14 +2035,14 @@ EXPORT_SYMBOL_GPL(gpiod_count);
*
* Return the GPIO descriptor corresponding to the function con_id of device
* dev, -ENOENT if no GPIO has been assigned to the requested function, or
- * another IS_ERR() code if an error occured while trying to acquire the GPIO.
+ * another IS_ERR() code if an error occurred while trying to acquire the GPIO.
*/
-struct gpio_desc *__must_check __gpiod_get(struct device *dev, const char *con_id,
+struct gpio_desc *__must_check gpiod_get(struct device *dev, const char *con_id,
enum gpiod_flags flags)
{
return gpiod_get_index(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL_GPL(__gpiod_get);
+EXPORT_SYMBOL_GPL(gpiod_get);
/**
* gpiod_get_optional - obtain an optional GPIO for a given GPIO function
@@ -1899,21 +2054,36 @@ EXPORT_SYMBOL_GPL(__gpiod_get);
* the requested function it will return NULL. This is convenient for drivers
* that need to handle optional GPIOs.
*/
-struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev,
+struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
const char *con_id,
enum gpiod_flags flags)
{
return gpiod_get_index_optional(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL_GPL(__gpiod_get_optional);
+EXPORT_SYMBOL_GPL(gpiod_get_optional);
+/**
+ * gpiod_parse_flags - helper function to parse GPIO lookup flags
+ * @desc: gpio to be setup
+ * @lflags: gpio_lookup_flags - returned from of_find_gpio() or
+ * of_get_gpio_hog()
+ *
+ * Set the GPIO descriptor flags based on the given GPIO lookup flags.
+ */
+static void gpiod_parse_flags(struct gpio_desc *desc, unsigned long lflags)
+{
+ if (lflags & GPIO_ACTIVE_LOW)
+ set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+ if (lflags & GPIO_OPEN_DRAIN)
+ set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+ if (lflags & GPIO_OPEN_SOURCE)
+ set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+}
/**
* gpiod_configure_flags - helper function to configure a given GPIO
* @desc: gpio whose value will be assigned
* @con_id: function within the GPIO consumer
- * @lflags: gpio_lookup_flags - returned from of_find_gpio() or
- * of_get_gpio_hog()
* @dflags: gpiod_flags - optional GPIO initialization flags
*
* Return 0 on success, -ENOENT if no GPIO has been assigned to the
@@ -1921,17 +2091,10 @@ EXPORT_SYMBOL_GPL(__gpiod_get_optional);
* occurred while trying to acquire the GPIO.
*/
static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
- unsigned long lflags, enum gpiod_flags dflags)
+ enum gpiod_flags dflags)
{
int status;
- if (lflags & GPIO_ACTIVE_LOW)
- set_bit(FLAG_ACTIVE_LOW, &desc->flags);
- if (lflags & GPIO_OPEN_DRAIN)
- set_bit(FLAG_OPEN_DRAIN, &desc->flags);
- if (lflags & GPIO_OPEN_SOURCE)
- set_bit(FLAG_OPEN_SOURCE, &desc->flags);
-
/* No particular flag request, return here... */
if (!(dflags & GPIOD_FLAGS_BIT_DIR_SET)) {
pr_debug("no flags found for %s\n", con_id);
@@ -1960,9 +2123,9 @@ static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
*
* Return a valid GPIO descriptor, -ENOENT if no GPIO has been assigned to the
* requested function and/or index, or another IS_ERR() code if an error
- * occured while trying to acquire the GPIO.
+ * occurred while trying to acquire the GPIO.
*/
-struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
const char *con_id,
unsigned int idx,
enum gpiod_flags flags)
@@ -1998,11 +2161,13 @@ struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
return desc;
}
+ gpiod_parse_flags(desc, lookupflags);
+
status = gpiod_request(desc, con_id);
if (status < 0)
return ERR_PTR(status);
- status = gpiod_configure_flags(desc, con_id, lookupflags, flags);
+ status = gpiod_configure_flags(desc, con_id, flags);
if (status < 0) {
dev_dbg(dev, "setup of GPIO %s failed\n", con_id);
gpiod_put(desc);
@@ -2011,7 +2176,7 @@ struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
return desc;
}
-EXPORT_SYMBOL_GPL(__gpiod_get_index);
+EXPORT_SYMBOL_GPL(gpiod_get_index);
/**
* fwnode_get_named_gpiod - obtain a GPIO from firmware node
@@ -2032,6 +2197,7 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
{
struct gpio_desc *desc = ERR_PTR(-ENODEV);
bool active_low = false;
+ bool single_ended = false;
int ret;
if (!fwnode)
@@ -2040,15 +2206,16 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
if (is_of_node(fwnode)) {
enum of_gpio_flags flags;
- desc = of_get_named_gpiod_flags(of_node(fwnode), propname, 0,
+ desc = of_get_named_gpiod_flags(to_of_node(fwnode), propname, 0,
&flags);
- if (!IS_ERR(desc))
+ if (!IS_ERR(desc)) {
active_low = flags & OF_GPIO_ACTIVE_LOW;
+ single_ended = flags & OF_GPIO_SINGLE_ENDED;
+ }
} else if (is_acpi_node(fwnode)) {
struct acpi_gpio_info info;
- desc = acpi_get_gpiod_by_index(acpi_node(fwnode), propname, 0,
- &info);
+ desc = acpi_node_get_gpiod(fwnode, propname, 0, &info);
if (!IS_ERR(desc))
active_low = info.active_low;
}
@@ -2056,14 +2223,20 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
if (IS_ERR(desc))
return desc;
+ if (active_low)
+ set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+
+ if (single_ended) {
+ if (active_low)
+ set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+ else
+ set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+ }
+
ret = gpiod_request(desc, NULL);
if (ret)
return ERR_PTR(ret);
- /* Only value flag can be set from both DT and ACPI is active_low */
- if (active_low)
- set_bit(FLAG_ACTIVE_LOW, &desc->flags);
-
return desc;
}
EXPORT_SYMBOL_GPL(fwnode_get_named_gpiod);
@@ -2080,7 +2253,7 @@ EXPORT_SYMBOL_GPL(fwnode_get_named_gpiod);
* specified index was assigned to the requested function it will return NULL.
* This is convenient for drivers that need to handle optional GPIOs.
*/
-struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
+struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
const char *con_id,
unsigned int index,
enum gpiod_flags flags)
@@ -2095,7 +2268,7 @@ struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
return desc;
}
-EXPORT_SYMBOL_GPL(__gpiod_get_index_optional);
+EXPORT_SYMBOL_GPL(gpiod_get_index_optional);
/**
* gpiod_hog - Hog the specified GPIO desc given the provided flags
@@ -2116,15 +2289,19 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
chip = gpiod_to_chip(desc);
hwnum = gpio_chip_hwgpio(desc);
+ gpiod_parse_flags(desc, lflags);
+
local_desc = gpiochip_request_own_desc(chip, hwnum, name);
if (IS_ERR(local_desc)) {
- pr_debug("requesting own GPIO %s failed\n", name);
+ pr_err("requesting hog GPIO %s (chip %s, offset %d) failed\n",
+ name, chip->label, hwnum);
return PTR_ERR(local_desc);
}
- status = gpiod_configure_flags(desc, name, lflags, dflags);
+ status = gpiod_configure_flags(desc, name, dflags);
if (status < 0) {
- pr_debug("setup of GPIO %s failed\n", name);
+ pr_err("setup of hog GPIO %s (chip %s, offset %d) failed\n",
+ name, chip->label, hwnum);
gpiochip_free_own_desc(desc);
return status;
}
@@ -2261,14 +2438,19 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
int is_irq;
for (i = 0; i < chip->ngpio; i++, gpio++, gdesc++) {
- if (!test_bit(FLAG_REQUESTED, &gdesc->flags))
+ if (!test_bit(FLAG_REQUESTED, &gdesc->flags)) {
+ if (gdesc->name) {
+ seq_printf(s, " gpio-%-3d (%-20.20s)\n",
+ gpio, gdesc->name);
+ }
continue;
+ }
gpiod_get_direction(gdesc);
is_out = test_bit(FLAG_IS_OUT, &gdesc->flags);
is_irq = test_bit(FLAG_USED_AS_IRQ, &gdesc->flags);
- seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s",
- gpio, gdesc->label,
+ seq_printf(s, " gpio-%-3d (%-20.20s|%-20.20s) %s %s %s",
+ gpio, gdesc->name ? gdesc->name : "", gdesc->label,
is_out ? "out" : "in ",
chip->get
? (chip->get(chip, i) ? "hi" : "lo")
diff --git a/kernel/drivers/gpio/gpiolib.h b/kernel/drivers/gpio/gpiolib.h
index 594b1798c..98ab08c0a 100644
--- a/kernel/drivers/gpio/gpiolib.h
+++ b/kernel/drivers/gpio/gpiolib.h
@@ -42,6 +42,9 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev,
const char *propname, int index,
struct acpi_gpio_info *info);
+struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
+ const char *propname, int index,
+ struct acpi_gpio_info *info);
int acpi_gpio_count(struct device *dev, const char *con_id);
#else
@@ -60,7 +63,12 @@ acpi_get_gpiod_by_index(struct acpi_device *adev, const char *propname,
{
return ERR_PTR(-ENOSYS);
}
-
+static inline struct gpio_desc *
+acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
+ int index, struct acpi_gpio_info *info)
+{
+ return ERR_PTR(-ENXIO);
+}
static inline int acpi_gpio_count(struct device *dev, const char *con_id)
{
return -ENODEV;
@@ -83,21 +91,16 @@ struct gpio_desc {
#define FLAG_IS_OUT 1
#define FLAG_EXPORT 2 /* protected by sysfs_lock */
#define FLAG_SYSFS 3 /* exported via /sys/class/gpio/control */
-#define FLAG_TRIG_FALL 4 /* trigger on falling edge */
-#define FLAG_TRIG_RISE 5 /* trigger on rising edge */
#define FLAG_ACTIVE_LOW 6 /* value has active low */
#define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */
#define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */
#define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */
-#define FLAG_SYSFS_DIR 10 /* show sysfs direction attribute */
#define FLAG_IS_HOGGED 11 /* GPIO is hogged */
-#define ID_SHIFT 16 /* add new flags before this one */
-
-#define GPIO_FLAGS_MASK ((1 << ID_SHIFT) - 1)
-#define GPIO_TRIGGER_MASK (BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE))
-
+ /* Connection label */
const char *label;
+ /* Name of the GPIO */
+ const char *name;
};
int gpiod_request(struct gpio_desc *desc, const char *label);
@@ -151,17 +154,17 @@ static int __maybe_unused gpio_chip_hwgpio(const struct gpio_desc *desc)
#ifdef CONFIG_GPIO_SYSFS
-int gpiochip_export(struct gpio_chip *chip);
-void gpiochip_unexport(struct gpio_chip *chip);
+int gpiochip_sysfs_register(struct gpio_chip *chip);
+void gpiochip_sysfs_unregister(struct gpio_chip *chip);
#else
-static inline int gpiochip_export(struct gpio_chip *chip)
+static inline int gpiochip_sysfs_register(struct gpio_chip *chip)
{
return 0;
}
-static inline void gpiochip_unexport(struct gpio_chip *chip)
+static inline void gpiochip_sysfs_unregister(struct gpio_chip *chip)
{
}