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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/leds')
10 files changed, 693 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/leds/common.txt b/kernel/Documentation/devicetree/bindings/leds/common.txt new file mode 100644 index 000000000..747c53805 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/common.txt @@ -0,0 +1,55 @@ +Common leds properties. + +LED and flash LED devices provide the same basic functionality as current +regulators, but extended with LED and flash LED specific features like +blinking patterns, flash timeout, flash faults and external flash strobe mode. + +Many LED devices expose more than one current output that can be connected +to one or more discrete LED component. Since the arrangement of connections +can influence the way of the LED device initialization, the LED components +have to be tightly coupled with the LED device binding. They are represented +by child nodes of the parent LED device binding. + +Optional properties for child nodes: +- led-sources : List of device current outputs the LED is connected to. The + outputs are identified by the numbers that must be defined + in the LED device binding documentation. +- label : The label for this LED. If omitted, the label is taken from the node + name (excluding the unit address). It has to uniquely identify + a device, i.e. no other LED class device can be assigned the same + label. + +- linux,default-trigger : This parameter, if present, is a + string defining the trigger assigned to the LED. Current triggers are: + "backlight" - LED will act as a back-light, controlled by the framebuffer + system + "default-on" - LED will turn on (but for leds-gpio see "default-state" + property in Documentation/devicetree/bindings/gpio/led.txt) + "heartbeat" - LED "double" flashes at a load average based rate + "ide-disk" - LED indicates disk activity + "timer" - LED flashes at a fixed, configurable rate + +- max-microamp : maximum intensity in microamperes of the LED + (torch LED for flash devices) +- flash-max-microamp : maximum intensity in microamperes of the + flash LED; it is mandatory if the LED should + support the flash mode +- flash-timeout-us : timeout in microseconds after which the flash + LED is turned off + + +Examples: + +system-status { + label = "Status"; + linux,default-trigger = "heartbeat"; + ... +}; + +camera-flash { + label = "Flash"; + led-sources = <0>, <1>; + max-microamp = <50000>; + flash-max-microamp = <320000>; + flash-timeout-us = <500000>; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-gpio.txt b/kernel/Documentation/devicetree/bindings/leds/leds-gpio.txt new file mode 100644 index 000000000..fea1ebfe2 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/leds-gpio.txt @@ -0,0 +1,66 @@ +LEDs connected to GPIO lines + +Required properties: +- compatible : should be "gpio-leds". + +Each LED is represented as a sub-node of the gpio-leds device. Each +node's name represents the name of the corresponding LED. + +LED sub-node properties: +- gpios : Should specify the LED's GPIO, see "gpios property" in + Documentation/devicetree/bindings/gpio/gpio.txt. Active low LEDs should be + indicated using flags in the GPIO specifier. +- label : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- default-state: (optional) The initial state of the LED. Valid + values are "on", "off", and "keep". If the LED is already on or off + and the default-state property is set the to same value, then no + glitch should be produced where the LED momentarily turns off (or + on). The "keep" setting will keep the LED at whatever its current + state is, without producing a glitch. The default is off if this + property is not present. +- retain-state-suspended: (optional) The suspend state can be retained.Such + as charge-led gpio. + +Examples: + +#include <dt-bindings/gpio/gpio.h> + +leds { + compatible = "gpio-leds"; + hdd { + label = "IDE Activity"; + gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>; + linux,default-trigger = "ide-disk"; + }; + + fault { + gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>; + /* Keep LED on if BIOS detected hardware fault */ + default-state = "keep"; + }; +}; + +run-control { + compatible = "gpio-leds"; + red { + gpios = <&mpc8572 6 GPIO_ACTIVE_HIGH>; + default-state = "off"; + }; + green { + gpios = <&mpc8572 7 GPIO_ACTIVE_HIGH>; + default-state = "on"; + }; +}; + +leds { + compatible = "gpio-leds"; + + charger-led { + gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>; + linux,default-trigger = "max8903-charger-charging"; + retain-state-suspended; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/kernel/Documentation/devicetree/bindings/leds/leds-lp55xx.txt new file mode 100644 index 000000000..1b66a413f --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/leds-lp55xx.txt @@ -0,0 +1,228 @@ +Binding for TI/National Semiconductor LP55xx Led Drivers + +Required properties: +- compatible: one of + national,lp5521 + national,lp5523 + ti,lp55231 + ti,lp5562 + ti,lp8501 + +- reg: I2C slave address +- clock-mode: Input clock mode, (0: automode, 1: internal, 2: external) + +Each child has own specific current settings +- led-cur: Current setting at each led channel (mA x10, 0 if led is not connected) +- max-cur: Maximun current at each led channel. + +Optional properties: +- enable-gpio: GPIO attached to the chip's enable pin +- label: Used for naming LEDs +- pwr-sel: LP8501 specific property. Power selection for output channels. + 0: D1~9 are connected to VDD + 1: D1~6 with VDD, D7~9 with VOUT + 2: D1~6 with VOUT, D7~9 with VDD + 3: D1~9 are connected to VOUT + +Alternatively, each child can have a specific channel name and trigger: +- chan-name (optional): name of channel +- linux,default-trigger (optional): see + Documentation/devicetree/bindings/leds/common.txt + +example 1) LP5521 +3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0', +'lp5521_pri:channel1' and 'lp5521_pri:channel2', with a heartbeat trigger +on channel 0. + +lp5521@32 { + compatible = "national,lp5521"; + reg = <0x32>; + label = "lp5521_pri"; + clock-mode = /bits/ 8 <2>; + + chan0 { + led-cur = /bits/ 8 <0x2f>; + max-cur = /bits/ 8 <0x5f>; + linux,default-trigger = "heartbeat"; + }; + + chan1 { + led-cur = /bits/ 8 <0x2f>; + max-cur = /bits/ 8 <0x5f>; + }; + + chan2 { + led-cur = /bits/ 8 <0x2f>; + max-cur = /bits/ 8 <0x5f>; + }; +}; + +example 2) LP5523 +9 LED channels with specific name. Internal clock used. +The I2C slave address is configurable with ASEL1 and ASEL0 pins. +Available addresses are 32/33/34/35h. + +ASEL1 ASEL0 Address +------------------------- + GND GND 32h + GND VEN 33h + VEN GND 34h + VEN VEN 35h + +lp5523@32 { + compatible = "national,lp5523"; + reg = <0x32>; + clock-mode = /bits/ 8 <1>; + + chan0 { + chan-name = "d1"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan1 { + chan-name = "d2"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan2 { + chan-name = "d3"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan3 { + chan-name = "d4"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan4 { + chan-name = "d5"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan5 { + chan-name = "d6"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan6 { + chan-name = "d7"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan7 { + chan-name = "d8"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan8 { + chan-name = "d9"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; +}; + +example 3) LP5562 +4 channels are defined. + +lp5562@30 { + compatible = "ti,lp5562"; + reg = <0x30>; + clock-mode = /bits/8 <2>; + + chan0 { + chan-name = "R"; + led-cur = /bits/ 8 <0x20>; + max-cur = /bits/ 8 <0x60>; + }; + + chan1 { + chan-name = "G"; + led-cur = /bits/ 8 <0x20>; + max-cur = /bits/ 8 <0x60>; + }; + + chan2 { + chan-name = "B"; + led-cur = /bits/ 8 <0x20>; + max-cur = /bits/ 8 <0x60>; + }; + + chan3 { + chan-name = "W"; + led-cur = /bits/ 8 <0x20>; + max-cur = /bits/ 8 <0x60>; + }; +}; + +example 4) LP8501 +9 channels are defined. The 'pwr-sel' is LP8501 specific property. +Others are same as LP5523. + +lp8501@32 { + compatible = "ti,lp8501"; + reg = <0x32>; + clock-mode = /bits/ 8 <2>; + pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */ + + chan0 { + chan-name = "d1"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan1 { + chan-name = "d2"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan2 { + chan-name = "d3"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan3 { + chan-name = "d4"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan4 { + chan-name = "d5"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan5 { + chan-name = "d6"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan6 { + chan-name = "d7"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan7 { + chan-name = "d8"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan8 { + chan-name = "d9"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-lp8860.txt b/kernel/Documentation/devicetree/bindings/leds/leds-lp8860.txt new file mode 100644 index 000000000..aad38dd94 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/leds-lp8860.txt @@ -0,0 +1,29 @@ +* Texas Instruments - lp8860 4-Channel LED Driver + +The LP8860-Q1 is an high-efficiency LED +driver with boost controller. It has 4 high-precision +current sinks that can be controlled by a PWM input +signal, a SPI/I2C master, or both. + +Required properties: + - compatible: + "ti,lp8860" + - reg - I2C slave address + - label - Used for naming LEDs + +Optional properties: + - enable-gpio - gpio pin to enable/disable the device. + - supply - "vled" - LED supply + +Example: + +leds: leds@6 { + compatible = "ti,lp8860"; + reg = <0x2d>; + label = "display_cluster"; + enable-gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>; + vled-supply = <&vbatt>; +} + +For more product information please see the link below: +http://www.ti.com/product/lp8860-q1 diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-ns2.txt b/kernel/Documentation/devicetree/bindings/leds/leds-ns2.txt new file mode 100644 index 000000000..aef3aca34 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/leds-ns2.txt @@ -0,0 +1,26 @@ +Binding for dual-GPIO LED found on Network Space v2 (and parents). + +Required properties: +- compatible: "lacie,ns2-leds". + +Each LED is represented as a sub-node of the ns2-leds device. + +Required sub-node properties: +- cmd-gpio: Command LED GPIO. See OF device-tree GPIO specification. +- slow-gpio: Slow LED GPIO. See OF device-tree GPIO specification. + +Optional sub-node properties: +- label: Name for this LED. If omitted, the label is taken from the node name. +- linux,default-trigger: Trigger assigned to the LED. + +Example: + +ns2-leds { + compatible = "lacie,ns2-leds"; + + blue-sata { + label = "ns2:blue:sata"; + slow-gpio = <&gpio0 29 0>; + cmd-gpio = <&gpio0 30 0>; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt b/kernel/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt new file mode 100644 index 000000000..a85a964d6 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt @@ -0,0 +1,43 @@ +Binding for Qualcomm PM8941 WLED driver + +Required properties: +- compatible: should be "qcom,pm8941-wled" +- reg: slave address + +Optional properties: +- label: The label for this led + See Documentation/devicetree/bindings/leds/common.txt +- linux,default-trigger: Default trigger assigned to the LED + See Documentation/devicetree/bindings/leds/common.txt +- qcom,cs-out: bool; enable current sink output +- qcom,cabc: bool; enable content adaptive backlight control +- qcom,ext-gen: bool; use externally generated modulator signal to dim +- qcom,current-limit: mA; per-string current limit; value from 0 to 25 + default: 20mA +- qcom,current-boost-limit: mA; boost current limit; one of: + 105, 385, 525, 805, 980, 1260, 1400, 1680 + default: 805mA +- qcom,switching-freq: kHz; switching frequency; one of: + 600, 640, 685, 738, 800, 872, 960, 1066, 1200, 1371, + 1600, 1920, 2400, 3200, 4800, 9600, + default: 1600kHz +- qcom,ovp: V; Over-voltage protection limit; one of: + 27, 29, 32, 35 + default: 29V +- qcom,num-strings: #; number of led strings attached; value from 1 to 3 + default: 2 + +Example: + +pm8941-wled@d800 { + compatible = "qcom,pm8941-wled"; + reg = <0xd800>; + label = "backlight"; + + qcom,cs-out; + qcom,current-limit = <20>; + qcom,current-boost-limit = <805>; + qcom,switching-freq = <1600>; + qcom,ovp = <29>; + qcom,num-strings = <2>; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-pwm.txt b/kernel/Documentation/devicetree/bindings/leds/leds-pwm.txt new file mode 100644 index 000000000..6c6583c35 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/leds-pwm.txt @@ -0,0 +1,50 @@ +LED connected to PWM + +Required properties: +- compatible : should be "pwm-leds". + +Each LED is represented as a sub-node of the pwm-leds device. Each +node's name represents the name of the corresponding LED. + +LED sub-node properties: +- pwms : PWM property to point to the PWM device (phandle)/port (id) and to + specify the period time to be used: <&phandle id period_ns>; +- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device + For the pwms and pwm-names property please refer to: + Documentation/devicetree/bindings/pwm/pwm.txt +- max-brightness : Maximum brightness possible for the LED +- active-low : (optional) For PWMs where the LED is wired to supply + rather than ground. +- label : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt + +Example: + +twl_pwm: pwm { + /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */ + compatible = "ti,twl6030-pwm"; + #pwm-cells = <2>; +}; + +twl_pwmled: pwmled { + /* provides one PWM (id 0 for Charing indicator LED) */ + compatible = "ti,twl6030-pwmled"; + #pwm-cells = <2>; +}; + +pwmleds { + compatible = "pwm-leds"; + kpad { + label = "omap4::keypad"; + pwms = <&twl_pwm 0 7812500>; + max-brightness = <127>; + }; + + charging { + label = "omap4:green:chrg"; + pwms = <&twl_pwmled 0 7812500>; + max-brightness = <255>; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/pca963x.txt b/kernel/Documentation/devicetree/bindings/leds/pca963x.txt new file mode 100644 index 000000000..dafbe9931 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/pca963x.txt @@ -0,0 +1,48 @@ +LEDs connected to pca9632, pca9633 or pca9634 + +Required properties: +- compatible : should be : "nxp,pca9632", "nxp,pca9633", "nxp,pca9634" or "nxp,pca9635" + +Optional properties: +- nxp,totem-pole : use totem pole (push-pull) instead of open-drain (pca9632 defaults + to open-drain, newer chips to totem pole) +- nxp,hw-blink : use hardware blinking instead of software blinking + +Each led is represented as a sub-node of the nxp,pca963x device. + +LED sub-node properties: +- label : (optional) see Documentation/devicetree/bindings/leds/common.txt +- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633, + 0 to 7 in pca9634, or 0 to 15 in pca9635) +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt + +Examples: + +pca9632: pca9632 { + compatible = "nxp,pca9632"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x62>; + + red@0 { + label = "red"; + reg = <0>; + linux,default-trigger = "none"; + }; + green@1 { + label = "green"; + reg = <1>; + linux,default-trigger = "none"; + }; + blue@2 { + label = "blue"; + reg = <2>; + linux,default-trigger = "none"; + }; + unused@3 { + label = "unused"; + reg = <3>; + linux,default-trigger = "none"; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/register-bit-led.txt b/kernel/Documentation/devicetree/bindings/leds/register-bit-led.txt new file mode 100644 index 000000000..379cefdc0 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/register-bit-led.txt @@ -0,0 +1,99 @@ +Device Tree Bindings for Register Bit LEDs + +Register bit leds are used with syscon multifunctional devices +where single bits in a certain register can turn on/off a +single LED. The register bit LEDs appear as children to the +syscon device, with the proper compatible string. For the +syscon bindings see: +Documentation/devicetree/bindings/mfd/syscon.txt + +Each LED is represented as a sub-node of the syscon device. Each +node's name represents the name of the corresponding LED. + +LED sub-node properties: + +Required properties: +- compatible : must be "register-bit-led" +- offset : register offset to the register controlling this LED +- mask : bit mask for the bit controlling this LED in the register + typically 0x01, 0x02, 0x04 ... + +Optional properties: +- label : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- default-state: (optional) The initial state of the LED. Valid + values are "on", "off", and "keep". If the LED is already on or off + and the default-state property is set the to same value, then no + glitch should be produced where the LED momentarily turns off (or + on). The "keep" setting will keep the LED at whatever its current + state is, without producing a glitch. The default is off if this + property is not present. + +Example: + +syscon: syscon@10000000 { + compatible = "arm,realview-pb1176-syscon", "syscon"; + reg = <0x10000000 0x1000>; + + led@08.0 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x01>; + label = "versatile:0"; + linux,default-trigger = "heartbeat"; + default-state = "on"; + }; + led@08.1 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x02>; + label = "versatile:1"; + linux,default-trigger = "mmc0"; + default-state = "off"; + }; + led@08.2 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x04>; + label = "versatile:2"; + linux,default-trigger = "cpu0"; + default-state = "off"; + }; + led@08.3 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x08>; + label = "versatile:3"; + default-state = "off"; + }; + led@08.4 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x10>; + label = "versatile:4"; + default-state = "off"; + }; + led@08.5 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x20>; + label = "versatile:5"; + default-state = "off"; + }; + led@08.6 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x40>; + label = "versatile:6"; + default-state = "off"; + }; + led@08.7 { + compatible = "register-bit-led"; + offset = <0x08>; + mask = <0x80>; + label = "versatile:7"; + default-state = "off"; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/leds/tca6507.txt b/kernel/Documentation/devicetree/bindings/leds/tca6507.txt new file mode 100644 index 000000000..bad910279 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/leds/tca6507.txt @@ -0,0 +1,49 @@ +LEDs connected to tca6507 + +Required properties: +- compatible : should be : "ti,tca6507". +- #address-cells: must be 1 +- #size-cells: must be 0 +- reg: typically 0x45. + +Optional properties: +- gpio-controller: allows lines to be used as output-only GPIOs. +- #gpio-cells: if present, must not be 0. + +Each led is represented as a sub-node of the ti,tca6507 device. + +LED sub-node properties: +- label : (optional) see Documentation/devicetree/bindings/leds/common.txt +- reg : number of LED line (could be from 0 to 6) +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- compatible: either "led" (the default) or "gpio". + +Examples: + +tca6507@45 { + compatible = "ti,tca6507"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x45>; + + gpio-controller; + #gpio-cells = <2>; + + led0: red-aux@0 { + label = "red:aux"; + reg = <0x0>; + }; + + led1: green-aux@1 { + label = "green:aux"; + reg = <0x5>; + linux,default-trigger = "default-on"; + }; + + wifi-reset@6 { + reg = <0x6>; + compatible = "gpio"; + }; +}; + |