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>

27 files changed, 1472 insertions, 162 deletions

diff --git a/kernel/drivers/iio/adc/Kconfig b/kernel/drivers/iio/adc/Kconfig
index 1bcb65b8d..1e7aded53 100644
--- a/kernel/drivers/iio/adc/Kconfig
+++ b/kernel/drivers/iio/adc/Kconfig
@@ -20,6 +20,9 @@ config AD7266
 	  Say yes here to build support for Analog Devices AD7265 and AD7266
 	  ADCs.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called ad7266.
+
 config AD7291
 	tristate "Analog Devices AD7291 ADC driver"
 	depends on I2C
@@ -52,8 +55,6 @@ config AD7476
 	  AD7277, AD7278, AD7475, AD7476, AD7477, AD7478, AD7466, AD7467, AD7468,
 	  AD7495, AD7910, AD7920, AD7920 SPI analog to digital converters (ADC).
 
-	  If unsure, say N (but it's safe to say "Y").
-
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad7476.
 
@@ -63,8 +64,7 @@ config AD7791
 	select AD_SIGMA_DELTA
 	help
 	  Say yes here to build support for Analog Devices AD7787, AD7788, AD7789,
-	  AD7790 and AD7791 SPI analog to digital converters (ADC). If unsure, say
-	  N (but it is safe to say "Y").
+	  AD7790 and AD7791 SPI analog to digital converters (ADC).
 
 	  To compile this driver as a module, choose M here: the module will be
 	  called ad7791.
@@ -76,7 +76,6 @@ config AD7793
 	help
 	  Say yes here to build support for Analog Devices AD7785, AD7792, AD7793,
 	  AD7794 and AD7795 SPI analog to digital converters (ADC).
-	  If unsure, say N (but it's safe to say "Y").
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called AD7793.
@@ -89,7 +88,6 @@ config AD7887
 	help
 	  Say yes here to build support for Analog Devices
 	  AD7887 SPI analog to digital converter (ADC).
-	  If unsure, say N (but it's safe to say "Y").
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad7887.
@@ -117,6 +115,9 @@ config AD799X
 	  i2c analog to digital converters (ADC). Provides direct access
 	  via sysfs.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called ad799x.
+
 config AT91_ADC
 	tristate "Atmel AT91 ADC"
 	depends on ARCH_AT91
@@ -127,6 +128,9 @@ config AT91_ADC
 	help
 	  Say yes here to build support for Atmel AT91 ADC.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called at91_adc.
+
 config AXP288_ADC
 	tristate "X-Powers AXP288 ADC driver"
 	depends on MFD_AXP20X
@@ -135,14 +139,15 @@ config AXP288_ADC
 	  device. Depending on platform configuration, this general purpose ADC can
 	  be used for sampling sensors such as thermal resistors.
 
-config DA9150_GPADC
-	tristate "Dialog DA9150 GPADC driver support"
-	depends on MFD_DA9150
-	help
-	  Say yes here to build support for Dialog DA9150 GPADC.
+	  To compile this driver as a module, choose M here: the module will be
+	  called axp288_adc.
 
-	  This driver can also be built as a module. If chosen, the module name
-	  will be da9150-gpadc.
+config BERLIN2_ADC
+	tristate "Marvell Berlin2 ADC driver"
+	depends on ARCH_BERLIN
+	help
+	  Marvell Berlin2 ADC driver. This ADC has 8 channels, with one used for
+	  temperature measurement.
 
 config CC10001_ADC
 	tristate "Cosmic Circuits 10001 ADC driver"
@@ -155,6 +160,18 @@ config CC10001_ADC
 	  This driver can also be built as a module. If so, the module will be
 	  called cc10001_adc.
 
+config DA9150_GPADC
+	tristate "Dialog DA9150 GPADC driver support"
+	depends on MFD_DA9150
+	help
+	  Say yes here to build support for Dialog DA9150 GPADC.
+
+	  This driver can also be built as a module. If chosen, the module name
+	  will be da9150-gpadc.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called berlin2-adc.
+
 config EXYNOS_ADC
 	tristate "Exynos ADC driver support"
 	depends on ARCH_EXYNOS || ARCH_S3C24XX || ARCH_S3C64XX || (OF && COMPILE_TEST)
@@ -163,12 +180,29 @@ config EXYNOS_ADC
 	  of SoCs for drivers such as the touchscreen and hwmon to use to share
 	  this resource.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called exynos_adc.
+
+config HI8435
+	tristate "Holt Integrated Circuits HI-8435 threshold detector"
+	select IIO_TRIGGERED_EVENT
+	depends on SPI
+	help
+	  If you say yes here you get support for Holt Integrated Circuits
+	  HI-8435 chip.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called hi8435.
+
 config LP8788_ADC
 	tristate "LP8788 ADC driver"
 	depends on MFD_LP8788
 	help
 	  Say yes here to build support for TI LP8788 ADC.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called lp8788_adc.
+
 config MAX1027
 	tristate "Maxim max1027 ADC driver"
 	depends on SPI
@@ -178,6 +212,9 @@ config MAX1027
 	  Say yes here to build support for Maxim SPI ADC models
 	  max1027, max1029 and max1031.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called max1027.
+
 config MAX1363
 	tristate "Maxim max1363 ADC driver"
 	depends on I2C
@@ -194,13 +231,16 @@ config MAX1363
 	  max11646, max11647) Provides direct access via sysfs and buffered
 	  data via the iio dev interface.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called max1363.
+
 config MCP320X
 	tristate "Microchip Technology MCP3x01/02/04/08"
 	depends on SPI
 	help
 	  Say yes here to build support for Microchip Technology's
-	  MCP3001, MCP3002, MCP3004, MCP3008, MCP3201, MCP3202, MCP3204 or
-	  MCP3208 analog to digital converter.
+	  MCP3001, MCP3002, MCP3004, MCP3008, MCP3201, MCP3202, MCP3204,
+	  MCP3208 or MCP3301 analog to digital converter.
 
 	  This driver can also be built as a module. If so, the module will be
 	  called mcp320x.
@@ -284,11 +324,11 @@ config TI_ADC081C
 	  called ti-adc081c.
 
 config TI_ADC128S052
-	tristate "Texas Instruments ADC128S052"
+	tristate "Texas Instruments ADC128S052/ADC122S021"
 	depends on SPI
 	help
 	  If you say yes here you get support for Texas Instruments ADC128S052
-	  chip.
+	  and ADC122S021 chips.
 
 	  This driver can also be built as a module. If so, the module will be
 	  called ti-adc128s052.
@@ -302,15 +342,18 @@ config TI_AM335X_ADC
 	  Say yes here to build support for Texas Instruments ADC
 	  driver which is also a MFD client.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called ti_am335x_adc.
+
 config TWL4030_MADC
 	tristate "TWL4030 MADC (Monitoring A/D Converter)"
 	depends on TWL4030_CORE
 	help
-	This driver provides support for Triton TWL4030-MADC. The
-	driver supports both RT and SW conversion methods.
+	  This driver provides support for Triton TWL4030-MADC. The
+	  driver supports both RT and SW conversion methods.
 
-	This driver can also be built as a module. If so, the module will be
-	called twl4030-madc.
+	  This driver can also be built as a module. If so, the module will be
+	  called twl4030-madc.
 
 config TWL6030_GPADC
 	tristate "TWL6030 GPADC (General Purpose A/D Converter) Support"
@@ -329,6 +372,9 @@ config TWL6030_GPADC
 config VF610_ADC
 	tristate "Freescale vf610 ADC driver"
 	depends on OF
+	depends on HAS_IOMEM
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to support for Vybrid board analog-to-digital converter.
 	  Since the IP is used for i.MX6SLX, the driver also support i.MX6SLX.
@@ -343,6 +389,9 @@ config VIPERBOARD_ADC
 	  Say yes here to access the ADC part of the Nano River
 	  Technologies Viperboard.
 
+	  To compile this driver as a module, choose M here: the module will be
+	  called viperboard_adc.
+
 config XILINX_XADC
 	tristate "Xilinx XADC driver"
 	depends on ARCH_ZYNQ || MICROBLAZE || COMPILE_TEST
diff --git a/kernel/drivers/iio/adc/Makefile b/kernel/drivers/iio/adc/Makefile
index 3930e63e8..99b37a963 100644
--- a/kernel/drivers/iio/adc/Makefile
+++ b/kernel/drivers/iio/adc/Makefile
@@ -15,9 +15,11 @@ obj-$(CONFIG_AD7887) += ad7887.o
 obj-$(CONFIG_AD799X) += ad799x.o
 obj-$(CONFIG_AT91_ADC) += at91_adc.o
 obj-$(CONFIG_AXP288_ADC) += axp288_adc.o
-obj-$(CONFIG_DA9150_GPADC) += da9150-gpadc.o
+obj-$(CONFIG_BERLIN2_ADC) += berlin2-adc.o
 obj-$(CONFIG_CC10001_ADC) += cc10001_adc.o
+obj-$(CONFIG_DA9150_GPADC) += da9150-gpadc.o
 obj-$(CONFIG_EXYNOS_ADC) += exynos_adc.o
+obj-$(CONFIG_HI8435) += hi8435.o
 obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
 obj-$(CONFIG_MAX1027) += max1027.o
 obj-$(CONFIG_MAX1363) += max1363.o
diff --git a/kernel/drivers/iio/adc/ad7266.c b/kernel/drivers/iio/adc/ad7266.c
index 70f78c306..21e19b60e 100644
--- a/kernel/drivers/iio/adc/ad7266.c
+++ b/kernel/drivers/iio/adc/ad7266.c
@@ -509,7 +509,6 @@ MODULE_DEVICE_TABLE(spi, ad7266_id);
 static struct spi_driver ad7266_driver = {
 	.driver = {
 		.name	= "ad7266",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7266_probe,
 	.remove		= ad7266_remove,
diff --git a/kernel/drivers/iio/adc/ad7298.c b/kernel/drivers/iio/adc/ad7298.c
index 4a8c0a2f4..62bb8f7ce 100644
--- a/kernel/drivers/iio/adc/ad7298.c
+++ b/kernel/drivers/iio/adc/ad7298.c
@@ -378,7 +378,6 @@ MODULE_DEVICE_TABLE(spi, ad7298_id);
 static struct spi_driver ad7298_driver = {
 	.driver = {
 		.name	= "ad7298",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7298_probe,
 	.remove		= ad7298_remove,
diff --git a/kernel/drivers/iio/adc/ad7476.c b/kernel/drivers/iio/adc/ad7476.c
index ce400ec17..be85c2a0a 100644
--- a/kernel/drivers/iio/adc/ad7476.c
+++ b/kernel/drivers/iio/adc/ad7476.c
@@ -302,7 +302,6 @@ MODULE_DEVICE_TABLE(spi, ad7476_id);
 static struct spi_driver ad7476_driver = {
 	.driver = {
 		.name	= "ad7476",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7476_probe,
 	.remove		= ad7476_remove,
diff --git a/kernel/drivers/iio/adc/ad7791.c b/kernel/drivers/iio/adc/ad7791.c
index c19f8fd1b..cf172d58c 100644
--- a/kernel/drivers/iio/adc/ad7791.c
+++ b/kernel/drivers/iio/adc/ad7791.c
@@ -440,7 +440,6 @@ MODULE_DEVICE_TABLE(spi, ad7791_spi_ids);
 static struct spi_driver ad7791_driver = {
 	.driver = {
 		.name	= "ad7791",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7791_probe,
 	.remove		= ad7791_remove,
diff --git a/kernel/drivers/iio/adc/ad7793.c b/kernel/drivers/iio/adc/ad7793.c
index b84922a4b..4d960d3b9 100644
--- a/kernel/drivers/iio/adc/ad7793.c
+++ b/kernel/drivers/iio/adc/ad7793.c
@@ -101,7 +101,7 @@
 #define AD7795_CH_AIN1M_AIN1M	8 /* AIN1(-) - AIN1(-) */
 
 /* ID Register Bit Designations (AD7793_REG_ID) */
-#define AD7785_ID		0xB
+#define AD7785_ID		0x3
 #define AD7792_ID		0xA
 #define AD7793_ID		0xB
 #define AD7794_ID		0xF
@@ -852,7 +852,6 @@ MODULE_DEVICE_TABLE(spi, ad7793_id);
 static struct spi_driver ad7793_driver = {
 	.driver = {
 		.name	= "ad7793",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7793_probe,
 	.remove		= ad7793_remove,
diff --git a/kernel/drivers/iio/adc/ad7887.c b/kernel/drivers/iio/adc/ad7887.c
index 2fd012ee9..2d3c397e6 100644
--- a/kernel/drivers/iio/adc/ad7887.c
+++ b/kernel/drivers/iio/adc/ad7887.c
@@ -356,7 +356,6 @@ MODULE_DEVICE_TABLE(spi, ad7887_id);
 static struct spi_driver ad7887_driver = {
 	.driver = {
 		.name	= "ad7887",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7887_probe,
 	.remove		= ad7887_remove,
diff --git a/kernel/drivers/iio/adc/ad7923.c b/kernel/drivers/iio/adc/ad7923.c
index 28732c28e..45e29ccd8 100644
--- a/kernel/drivers/iio/adc/ad7923.c
+++ b/kernel/drivers/iio/adc/ad7923.c
@@ -357,7 +357,6 @@ MODULE_DEVICE_TABLE(spi, ad7923_id);
 static struct spi_driver ad7923_driver = {
 	.driver = {
 		.name	= "ad7923",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7923_probe,
 	.remove		= ad7923_remove,
diff --git a/kernel/drivers/iio/adc/ad799x.c b/kernel/drivers/iio/adc/ad799x.c
index b99de00e5..01d71588d 100644
--- a/kernel/drivers/iio/adc/ad799x.c
+++ b/kernel/drivers/iio/adc/ad799x.c
@@ -528,7 +528,6 @@ static struct attribute *ad799x_event_attributes[] = {
 
 static struct attribute_group ad799x_event_attrs_group = {
 	.attrs = ad799x_event_attributes,
-	.name = "events",
 };
 
 static const struct iio_info ad7991_info = {
diff --git a/kernel/drivers/iio/adc/axp288_adc.c b/kernel/drivers/iio/adc/axp288_adc.c
index 56008a86b..0c904edd6 100644
--- a/kernel/drivers/iio/adc/axp288_adc.c
+++ b/kernel/drivers/iio/adc/axp288_adc.c
@@ -238,7 +238,7 @@ static int axp288_adc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_device_id axp288_adc_id_table[] = {
+static const struct platform_device_id axp288_adc_id_table[] = {
 	{ .name = "axp288_adc" },
 	{},
 };
diff --git a/kernel/drivers/iio/adc/berlin2-adc.c b/kernel/drivers/iio/adc/berlin2-adc.c
new file mode 100644
index 000000000..71c806ecc
--- /dev/null
+++ b/kernel/drivers/iio/adc/berlin2-adc.c
@@ -0,0 +1,381 @@
+/*
+ * Marvell Berlin2 ADC driver
+ *
+ * Copyright (C) 2015 Marvell Technology Group Ltd.
+ *
+ * Antoine Tenart <antoine.tenart@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/iio/iio.h>
+#include <linux/iio/driver.h>
+#include <linux/iio/machine.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+
+#define BERLIN2_SM_CTRL				0x14
+#define  BERLIN2_SM_CTRL_SM_SOC_INT		BIT(1)
+#define  BERLIN2_SM_CTRL_SOC_SM_INT		BIT(2)
+#define  BERLIN2_SM_CTRL_ADC_SEL(x)		((x) << 5)	/* 0-15 */
+#define  BERLIN2_SM_CTRL_ADC_SEL_MASK		GENMASK(8, 5)
+#define  BERLIN2_SM_CTRL_ADC_POWER		BIT(9)
+#define  BERLIN2_SM_CTRL_ADC_CLKSEL_DIV2	(0x0 << 10)
+#define  BERLIN2_SM_CTRL_ADC_CLKSEL_DIV3	(0x1 << 10)
+#define  BERLIN2_SM_CTRL_ADC_CLKSEL_DIV4	(0x2 << 10)
+#define  BERLIN2_SM_CTRL_ADC_CLKSEL_DIV8	(0x3 << 10)
+#define  BERLIN2_SM_CTRL_ADC_CLKSEL_MASK	GENMASK(11, 10)
+#define  BERLIN2_SM_CTRL_ADC_START		BIT(12)
+#define  BERLIN2_SM_CTRL_ADC_RESET		BIT(13)
+#define  BERLIN2_SM_CTRL_ADC_BANDGAP_RDY	BIT(14)
+#define  BERLIN2_SM_CTRL_ADC_CONT_SINGLE	(0x0 << 15)
+#define  BERLIN2_SM_CTRL_ADC_CONT_CONTINUOUS	(0x1 << 15)
+#define  BERLIN2_SM_CTRL_ADC_BUFFER_EN		BIT(16)
+#define  BERLIN2_SM_CTRL_ADC_VREF_EXT		(0x0 << 17)
+#define  BERLIN2_SM_CTRL_ADC_VREF_INT		(0x1 << 17)
+#define  BERLIN2_SM_CTRL_ADC_ROTATE		BIT(19)
+#define  BERLIN2_SM_CTRL_TSEN_EN		BIT(20)
+#define  BERLIN2_SM_CTRL_TSEN_CLK_SEL_125	(0x0 << 21)	/* 1.25 MHz */
+#define  BERLIN2_SM_CTRL_TSEN_CLK_SEL_250	(0x1 << 21)	/* 2.5 MHz */
+#define  BERLIN2_SM_CTRL_TSEN_MODE_0_125	(0x0 << 22)	/* 0-125 C */
+#define  BERLIN2_SM_CTRL_TSEN_MODE_10_50	(0x1 << 22)	/* 10-50 C */
+#define  BERLIN2_SM_CTRL_TSEN_RESET		BIT(29)
+#define BERLIN2_SM_ADC_DATA			0x20
+#define  BERLIN2_SM_ADC_MASK			GENMASK(9, 0)
+#define BERLIN2_SM_ADC_STATUS			0x1c
+#define  BERLIN2_SM_ADC_STATUS_DATA_RDY(x)	BIT(x)		/* 0-15 */
+#define  BERLIN2_SM_ADC_STATUS_DATA_RDY_MASK	GENMASK(15, 0)
+#define  BERLIN2_SM_ADC_STATUS_INT_EN(x)	(BIT(x) << 16)	/* 0-15 */
+#define  BERLIN2_SM_ADC_STATUS_INT_EN_MASK	GENMASK(31, 16)
+#define BERLIN2_SM_TSEN_STATUS			0x24
+#define  BERLIN2_SM_TSEN_STATUS_DATA_RDY	BIT(0)
+#define  BERLIN2_SM_TSEN_STATUS_INT_EN		BIT(1)
+#define BERLIN2_SM_TSEN_DATA			0x28
+#define  BERLIN2_SM_TSEN_MASK			GENMASK(9, 0)
+#define BERLIN2_SM_TSEN_CTRL			0x74
+#define  BERLIN2_SM_TSEN_CTRL_START		BIT(8)
+#define  BERLIN2_SM_TSEN_CTRL_SETTLING_4	(0x0 << 21)	/* 4 us */
+#define  BERLIN2_SM_TSEN_CTRL_SETTLING_12	(0x1 << 21)	/* 12 us */
+#define  BERLIN2_SM_TSEN_CTRL_SETTLING_MASK	BIT(21)
+#define  BERLIN2_SM_TSEN_CTRL_TRIM(x)		((x) << 22)
+#define  BERLIN2_SM_TSEN_CTRL_TRIM_MASK		GENMASK(25, 22)
+
+struct berlin2_adc_priv {
+	struct regmap		*regmap;
+	struct mutex		lock;
+	wait_queue_head_t	wq;
+	bool			data_available;
+	int			data;
+};
+
+#define BERLIN2_ADC_CHANNEL(n, t)					\
+	{								\
+		.channel		= n,				\
+		.datasheet_name		= "channel"#n,			\
+		.type			= t,				\
+		.indexed		= 1,				\
+		.info_mask_separate	= BIT(IIO_CHAN_INFO_RAW),	\
+	}
+
+static const struct iio_chan_spec berlin2_adc_channels[] = {
+	BERLIN2_ADC_CHANNEL(0, IIO_VOLTAGE),	/* external input */
+	BERLIN2_ADC_CHANNEL(1, IIO_VOLTAGE),	/* external input */
+	BERLIN2_ADC_CHANNEL(2, IIO_VOLTAGE),	/* external input */
+	BERLIN2_ADC_CHANNEL(3, IIO_VOLTAGE),	/* external input */
+	BERLIN2_ADC_CHANNEL(4, IIO_VOLTAGE),	/* reserved */
+	BERLIN2_ADC_CHANNEL(5, IIO_VOLTAGE),	/* reserved */
+	{					/* temperature sensor */
+		.channel		= 6,
+		.datasheet_name		= "channel6",
+		.type			= IIO_TEMP,
+		.indexed		= 0,
+		.info_mask_separate	= BIT(IIO_CHAN_INFO_PROCESSED),
+	},
+	BERLIN2_ADC_CHANNEL(7, IIO_VOLTAGE),	/* reserved */
+	IIO_CHAN_SOFT_TIMESTAMP(8),		/* timestamp */
+};
+
+static int berlin2_adc_read(struct iio_dev *indio_dev, int channel)
+{
+	struct berlin2_adc_priv *priv = iio_priv(indio_dev);
+	int data, ret;
+
+	mutex_lock(&priv->lock);
+
+	/* Enable the interrupts */
+	regmap_write(priv->regmap, BERLIN2_SM_ADC_STATUS,
+		     BERLIN2_SM_ADC_STATUS_INT_EN(channel));
+
+	/* Configure the ADC */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
+			   BERLIN2_SM_CTRL_ADC_RESET |
+			   BERLIN2_SM_CTRL_ADC_SEL_MASK |
+			   BERLIN2_SM_CTRL_ADC_START,
+			   BERLIN2_SM_CTRL_ADC_SEL(channel) |
+			   BERLIN2_SM_CTRL_ADC_START);
+
+	ret = wait_event_interruptible_timeout(priv->wq, priv->data_available,
+					       msecs_to_jiffies(1000));
+
+	/* Disable the interrupts */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_ADC_STATUS,
+			   BERLIN2_SM_ADC_STATUS_INT_EN(channel), 0);
+
+	if (ret == 0)
+		ret = -ETIMEDOUT;
+	if (ret < 0) {
+		mutex_unlock(&priv->lock);
+		return ret;
+	}
+
+	regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
+			   BERLIN2_SM_CTRL_ADC_START, 0);
+
+	data = priv->data;
+	priv->data_available = false;
+
+	mutex_unlock(&priv->lock);
+
+	return data;
+}
+
+static int berlin2_adc_tsen_read(struct iio_dev *indio_dev)
+{
+	struct berlin2_adc_priv *priv = iio_priv(indio_dev);
+	int data, ret;
+
+	mutex_lock(&priv->lock);
+
+	/* Enable interrupts */
+	regmap_write(priv->regmap, BERLIN2_SM_TSEN_STATUS,
+		     BERLIN2_SM_TSEN_STATUS_INT_EN);
+
+	/* Configure the ADC */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
+			   BERLIN2_SM_CTRL_TSEN_RESET |
+			   BERLIN2_SM_CTRL_ADC_ROTATE,
+			   BERLIN2_SM_CTRL_ADC_ROTATE);
+
+	/* Configure the temperature sensor */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_TSEN_CTRL,
+			   BERLIN2_SM_TSEN_CTRL_TRIM_MASK |
+			   BERLIN2_SM_TSEN_CTRL_SETTLING_MASK |
+			   BERLIN2_SM_TSEN_CTRL_START,
+			   BERLIN2_SM_TSEN_CTRL_TRIM(3) |
+			   BERLIN2_SM_TSEN_CTRL_SETTLING_12 |
+			   BERLIN2_SM_TSEN_CTRL_START);
+
+	ret = wait_event_interruptible_timeout(priv->wq, priv->data_available,
+					       msecs_to_jiffies(1000));
+
+	/* Disable interrupts */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_TSEN_STATUS,
+			   BERLIN2_SM_TSEN_STATUS_INT_EN, 0);
+
+	if (ret == 0)
+		ret = -ETIMEDOUT;
+	if (ret < 0) {
+		mutex_unlock(&priv->lock);
+		return ret;
+	}
+
+	regmap_update_bits(priv->regmap, BERLIN2_SM_TSEN_CTRL,
+			   BERLIN2_SM_TSEN_CTRL_START, 0);
+
+	data = priv->data;
+	priv->data_available = false;
+
+	mutex_unlock(&priv->lock);
+
+	return data;
+}
+
+static int berlin2_adc_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan, int *val,
+				int *val2, long mask)
+{
+	int temp;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (chan->type != IIO_VOLTAGE)
+			return -EINVAL;
+
+		*val = berlin2_adc_read(indio_dev, chan->channel);
+		if (*val < 0)
+			return *val;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_PROCESSED:
+		if (chan->type != IIO_TEMP)
+			return -EINVAL;
+
+		temp = berlin2_adc_tsen_read(indio_dev);
+		if (temp < 0)
+			return temp;
+
+		if (temp > 2047)
+			temp -= 4096;
+
+		/* Convert to milli Celsius */
+		*val = ((temp * 100000) / 264 - 270000);
+		return IIO_VAL_INT;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static irqreturn_t berlin2_adc_irq(int irq, void *private)
+{
+	struct berlin2_adc_priv *priv = iio_priv(private);
+	unsigned val;
+
+	regmap_read(priv->regmap, BERLIN2_SM_ADC_STATUS, &val);
+	if (val & BERLIN2_SM_ADC_STATUS_DATA_RDY_MASK) {
+		regmap_read(priv->regmap, BERLIN2_SM_ADC_DATA, &priv->data);
+		priv->data &= BERLIN2_SM_ADC_MASK;
+
+		val &= ~BERLIN2_SM_ADC_STATUS_DATA_RDY_MASK;
+		regmap_write(priv->regmap, BERLIN2_SM_ADC_STATUS, val);
+
+		priv->data_available = true;
+		wake_up_interruptible(&priv->wq);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t berlin2_adc_tsen_irq(int irq, void *private)
+{
+	struct berlin2_adc_priv *priv = iio_priv(private);
+	unsigned val;
+
+	regmap_read(priv->regmap, BERLIN2_SM_TSEN_STATUS, &val);
+	if (val & BERLIN2_SM_TSEN_STATUS_DATA_RDY) {
+		regmap_read(priv->regmap, BERLIN2_SM_TSEN_DATA, &priv->data);
+		priv->data &= BERLIN2_SM_TSEN_MASK;
+
+		val &= ~BERLIN2_SM_TSEN_STATUS_DATA_RDY;
+		regmap_write(priv->regmap, BERLIN2_SM_TSEN_STATUS, val);
+
+		priv->data_available = true;
+		wake_up_interruptible(&priv->wq);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static const struct iio_info berlin2_adc_info = {
+	.driver_module	= THIS_MODULE,
+	.read_raw	= berlin2_adc_read_raw,
+};
+
+static int berlin2_adc_probe(struct platform_device *pdev)
+{
+	struct iio_dev *indio_dev;
+	struct berlin2_adc_priv *priv;
+	struct device_node *parent_np = of_get_parent(pdev->dev.of_node);
+	int irq, tsen_irq;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	priv = iio_priv(indio_dev);
+	platform_set_drvdata(pdev, indio_dev);
+
+	priv->regmap = syscon_node_to_regmap(parent_np);
+	of_node_put(parent_np);
+	if (IS_ERR(priv->regmap))
+		return PTR_ERR(priv->regmap);
+
+	irq = platform_get_irq_byname(pdev, "adc");
+	if (irq < 0)
+		return irq;
+
+	tsen_irq = platform_get_irq_byname(pdev, "tsen");
+	if (tsen_irq < 0)
+		return tsen_irq;
+
+	ret = devm_request_irq(&pdev->dev, irq, berlin2_adc_irq, 0,
+			       pdev->dev.driver->name, indio_dev);
+	if (ret)
+		return ret;
+
+	ret = devm_request_irq(&pdev->dev, tsen_irq, berlin2_adc_tsen_irq,
+			       0, pdev->dev.driver->name, indio_dev);
+	if (ret)
+		return ret;
+
+	init_waitqueue_head(&priv->wq);
+	mutex_init(&priv->lock);
+
+	indio_dev->dev.parent = &pdev->dev;
+	indio_dev->name = dev_name(&pdev->dev);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &berlin2_adc_info;
+
+	indio_dev->channels = berlin2_adc_channels;
+	indio_dev->num_channels = ARRAY_SIZE(berlin2_adc_channels);
+
+	/* Power up the ADC */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
+			   BERLIN2_SM_CTRL_ADC_POWER,
+			   BERLIN2_SM_CTRL_ADC_POWER);
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		/* Power down the ADC */
+		regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
+				   BERLIN2_SM_CTRL_ADC_POWER, 0);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int berlin2_adc_remove(struct platform_device *pdev)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct berlin2_adc_priv *priv = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	/* Power down the ADC */
+	regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
+			   BERLIN2_SM_CTRL_ADC_POWER, 0);
+
+	return 0;
+}
+
+static const struct of_device_id berlin2_adc_match[] = {
+	{ .compatible = "marvell,berlin2-adc", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, berlin2_adc_match);
+
+static struct platform_driver berlin2_adc_driver = {
+	.driver	= {
+		.name		= "berlin2-adc",
+		.of_match_table	= berlin2_adc_match,
+	},
+	.probe	= berlin2_adc_probe,
+	.remove	= berlin2_adc_remove,
+};
+module_platform_driver(berlin2_adc_driver);
+
+MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
+MODULE_DESCRIPTION("Marvell Berlin2 ADC driver");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/iio/adc/cc10001_adc.c b/kernel/drivers/iio/adc/cc10001_adc.c
index 115f6e99a..8254f529b 100644
--- a/kernel/drivers/iio/adc/cc10001_adc.c
+++ b/kernel/drivers/iio/adc/cc10001_adc.c
@@ -62,6 +62,7 @@ struct cc10001_adc_device {
 	struct regulator *reg;
 	u16 *buf;
 
+	bool shared;
 	struct mutex lock;
 	unsigned int start_delay_ns;
 	unsigned int eoc_delay_ns;
@@ -153,7 +154,8 @@ static irqreturn_t cc10001_adc_trigger_h(int irq, void *p)
 
 	mutex_lock(&adc_dev->lock);
 
-	cc10001_adc_power_up(adc_dev);
+	if (!adc_dev->shared)
+		cc10001_adc_power_up(adc_dev);
 
 	/* Calculate delay step for eoc and sampled data */
 	delay_ns = adc_dev->eoc_delay_ns / CC10001_MAX_POLL_COUNT;
@@ -177,7 +179,8 @@ static irqreturn_t cc10001_adc_trigger_h(int irq, void *p)
 	}
 
 done:
-	cc10001_adc_power_down(adc_dev);
+	if (!adc_dev->shared)
+		cc10001_adc_power_down(adc_dev);
 
 	mutex_unlock(&adc_dev->lock);
 
@@ -196,7 +199,8 @@ static u16 cc10001_adc_read_raw_voltage(struct iio_dev *indio_dev,
 	unsigned int delay_ns;
 	u16 val;
 
-	cc10001_adc_power_up(adc_dev);
+	if (!adc_dev->shared)
+		cc10001_adc_power_up(adc_dev);
 
 	/* Calculate delay step for eoc and sampled data */
 	delay_ns = adc_dev->eoc_delay_ns / CC10001_MAX_POLL_COUNT;
@@ -205,7 +209,8 @@ static u16 cc10001_adc_read_raw_voltage(struct iio_dev *indio_dev,
 
 	val = cc10001_adc_poll_done(indio_dev, chan->channel, delay_ns);
 
-	cc10001_adc_power_down(adc_dev);
+	if (!adc_dev->shared)
+		cc10001_adc_power_down(adc_dev);
 
 	return val;
 }
@@ -322,8 +327,10 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 	adc_dev = iio_priv(indio_dev);
 
 	channel_map = GENMASK(CC10001_ADC_NUM_CHANNELS - 1, 0);
-	if (!of_property_read_u32(node, "adc-reserved-channels", &ret))
+	if (!of_property_read_u32(node, "adc-reserved-channels", &ret)) {
+		adc_dev->shared = true;
 		channel_map &= ~ret;
+	}
 
 	adc_dev->reg = devm_regulator_get(&pdev->dev, "vref");
 	if (IS_ERR(adc_dev->reg))
@@ -368,6 +375,14 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 	adc_dev->eoc_delay_ns = NSEC_PER_SEC / adc_clk_rate;
 	adc_dev->start_delay_ns = adc_dev->eoc_delay_ns * CC10001_WAIT_CYCLES;
 
+	/*
+	 * There is only one register to power-up/power-down the AUX ADC.
+	 * If the ADC is shared among multiple CPUs, always power it up here.
+	 * If the ADC is used only by the MIPS, power-up/power-down at runtime.
+	 */
+	if (adc_dev->shared)
+		cc10001_adc_power_up(adc_dev);
+
 	/* Setup the ADC channels available on the device */
 	ret = cc10001_adc_channel_init(indio_dev, channel_map);
 	if (ret < 0)
@@ -402,6 +417,7 @@ static int cc10001_adc_remove(struct platform_device *pdev)
 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 	struct cc10001_adc_device *adc_dev = iio_priv(indio_dev);
 
+	cc10001_adc_power_down(adc_dev);
 	iio_device_unregister(indio_dev);
 	iio_triggered_buffer_cleanup(indio_dev);
 	clk_disable_unprepare(adc_dev->adc_clk);
diff --git a/kernel/drivers/iio/adc/hi8435.c b/kernel/drivers/iio/adc/hi8435.c
new file mode 100644
index 000000000..c73c6c62a
--- /dev/null
+++ b/kernel/drivers/iio/adc/hi8435.c
@@ -0,0 +1,534 @@
+/*
+ * Holt Integrated Circuits HI-8435 threshold detector driver
+ *
+ * Copyright (C) 2015 Zodiac Inflight Innovations
+ * Copyright (C) 2015 Cogent Embedded, Inc.
+ *
+ * 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;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_event.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/gpio/consumer.h>
+
+#define DRV_NAME "hi8435"
+
+/* Register offsets for HI-8435 */
+#define HI8435_CTRL_REG		0x02
+#define HI8435_PSEN_REG		0x04
+#define HI8435_TMDATA_REG	0x1E
+#define HI8435_GOCENHYS_REG	0x3A
+#define HI8435_SOCENHYS_REG	0x3C
+#define HI8435_SO7_0_REG	0x10
+#define HI8435_SO15_8_REG	0x12
+#define HI8435_SO23_16_REG	0x14
+#define HI8435_SO31_24_REG	0x16
+#define HI8435_SO31_0_REG	0x78
+
+#define HI8435_WRITE_OPCODE	0x00
+#define HI8435_READ_OPCODE	0x80
+
+/* CTRL register bits */
+#define HI8435_CTRL_TEST	0x01
+#define HI8435_CTRL_SRST	0x02
+
+struct hi8435_priv {
+	struct spi_device *spi;
+	struct mutex lock;
+
+	unsigned long event_scan_mask; /* soft mask/unmask channels events */
+	unsigned int event_prev_val;
+
+	unsigned threshold_lo[2]; /* GND-Open and Supply-Open thresholds */
+	unsigned threshold_hi[2]; /* GND-Open and Supply-Open thresholds */
+	u8 reg_buffer[3] ____cacheline_aligned;
+};
+
+static int hi8435_readb(struct hi8435_priv *priv, u8 reg, u8 *val)
+{
+	reg |= HI8435_READ_OPCODE;
+	return spi_write_then_read(priv->spi, &reg, 1, val, 1);
+}
+
+static int hi8435_readw(struct hi8435_priv *priv, u8 reg, u16 *val)
+{
+	int ret;
+	__be16 be_val;
+
+	reg |= HI8435_READ_OPCODE;
+	ret = spi_write_then_read(priv->spi, &reg, 1, &be_val, 2);
+	*val = be16_to_cpu(be_val);
+
+	return ret;
+}
+
+static int hi8435_readl(struct hi8435_priv *priv, u8 reg, u32 *val)
+{
+	int ret;
+	__be32 be_val;
+
+	reg |= HI8435_READ_OPCODE;
+	ret = spi_write_then_read(priv->spi, &reg, 1, &be_val, 4);
+	*val = be32_to_cpu(be_val);
+
+	return ret;
+}
+
+static int hi8435_writeb(struct hi8435_priv *priv, u8 reg, u8 val)
+{
+	priv->reg_buffer[0] = reg | HI8435_WRITE_OPCODE;
+	priv->reg_buffer[1] = val;
+
+	return spi_write(priv->spi, priv->reg_buffer, 2);
+}
+
+static int hi8435_writew(struct hi8435_priv *priv, u8 reg, u16 val)
+{
+	priv->reg_buffer[0] = reg | HI8435_WRITE_OPCODE;
+	priv->reg_buffer[1] = (val >> 8) & 0xff;
+	priv->reg_buffer[2] = val & 0xff;
+
+	return spi_write(priv->spi, priv->reg_buffer, 3);
+}
+
+static int hi8435_read_event_config(struct iio_dev *idev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+
+	return !!(priv->event_scan_mask & BIT(chan->channel));
+}
+
+static int hi8435_write_event_config(struct iio_dev *idev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir, int state)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+
+	priv->event_scan_mask &= ~BIT(chan->channel);
+	if (state)
+		priv->event_scan_mask |= BIT(chan->channel);
+
+	return 0;
+}
+
+static int hi8435_read_event_value(struct iio_dev *idev,
+				   const struct iio_chan_spec *chan,
+				   enum iio_event_type type,
+				   enum iio_event_direction dir,
+				   enum iio_event_info info,
+				   int *val, int *val2)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+	int ret;
+	u8 mode, psen;
+	u16 reg;
+
+	ret = hi8435_readb(priv, HI8435_PSEN_REG, &psen);
+	if (ret < 0)
+		return ret;
+
+	/* Supply-Open or GND-Open sensing mode */
+	mode = !!(psen & BIT(chan->channel / 8));
+
+	ret = hi8435_readw(priv, mode ? HI8435_SOCENHYS_REG :
+				 HI8435_GOCENHYS_REG, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (dir == IIO_EV_DIR_FALLING)
+		*val = ((reg & 0xff) - (reg >> 8)) / 2;
+	else if (dir == IIO_EV_DIR_RISING)
+		*val = ((reg & 0xff) + (reg >> 8)) / 2;
+
+	return IIO_VAL_INT;
+}
+
+static int hi8435_write_event_value(struct iio_dev *idev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int val, int val2)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+	int ret;
+	u8 mode, psen;
+	u16 reg;
+
+	ret = hi8435_readb(priv, HI8435_PSEN_REG, &psen);
+	if (ret < 0)
+		return ret;
+
+	/* Supply-Open or GND-Open sensing mode */
+	mode = !!(psen & BIT(chan->channel / 8));
+
+	ret = hi8435_readw(priv, mode ? HI8435_SOCENHYS_REG :
+				 HI8435_GOCENHYS_REG, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (dir == IIO_EV_DIR_FALLING) {
+		/* falling threshold range 2..21V, hysteresis minimum 2V */
+		if (val < 2 || val > 21 || (val + 2) > priv->threshold_hi[mode])
+			return -EINVAL;
+
+		if (val == priv->threshold_lo[mode])
+			return 0;
+
+		priv->threshold_lo[mode] = val;
+
+		/* hysteresis must not be odd */
+		if ((priv->threshold_hi[mode] - priv->threshold_lo[mode]) % 2)
+			priv->threshold_hi[mode]--;
+	} else if (dir == IIO_EV_DIR_RISING) {
+		/* rising threshold range 3..22V, hysteresis minimum 2V */
+		if (val < 3 || val > 22 || val < (priv->threshold_lo[mode] + 2))
+			return -EINVAL;
+
+		if (val == priv->threshold_hi[mode])
+			return 0;
+
+		priv->threshold_hi[mode] = val;
+
+		/* hysteresis must not be odd */
+		if ((priv->threshold_hi[mode] - priv->threshold_lo[mode]) % 2)
+			priv->threshold_lo[mode]++;
+	}
+
+	/* program thresholds */
+	mutex_lock(&priv->lock);
+
+	ret = hi8435_readw(priv, mode ? HI8435_SOCENHYS_REG :
+				 HI8435_GOCENHYS_REG, &reg);
+	if (ret < 0) {
+		mutex_unlock(&priv->lock);
+		return ret;
+	}
+
+	/* hysteresis */
+	reg = priv->threshold_hi[mode] - priv->threshold_lo[mode];
+	reg <<= 8;
+	/* threshold center */
+	reg |= (priv->threshold_hi[mode] + priv->threshold_lo[mode]);
+
+	ret = hi8435_writew(priv, mode ? HI8435_SOCENHYS_REG :
+				  HI8435_GOCENHYS_REG, reg);
+
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int hi8435_debugfs_reg_access(struct iio_dev *idev,
+				     unsigned reg, unsigned writeval,
+				     unsigned *readval)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+	int ret;
+	u8 val;
+
+	if (readval != NULL) {
+		ret = hi8435_readb(priv, reg, &val);
+		*readval = val;
+	} else {
+		val = (u8)writeval;
+		ret = hi8435_writeb(priv, reg, val);
+	}
+
+	return ret;
+}
+
+static const struct iio_event_spec hi8435_events[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE),
+	}, {
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE),
+	}, {
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
+static int hi8435_get_sensing_mode(struct iio_dev *idev,
+				   const struct iio_chan_spec *chan)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+	int ret;
+	u8 reg;
+
+	ret = hi8435_readb(priv, HI8435_PSEN_REG, &reg);
+	if (ret < 0)
+		return ret;
+
+	return !!(reg & BIT(chan->channel / 8));
+}
+
+static int hi8435_set_sensing_mode(struct iio_dev *idev,
+				   const struct iio_chan_spec *chan,
+				   unsigned int mode)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+	int ret;
+	u8 reg;
+
+	mutex_lock(&priv->lock);
+
+	ret = hi8435_readb(priv, HI8435_PSEN_REG, &reg);
+	if (ret < 0) {
+		mutex_unlock(&priv->lock);
+		return ret;
+	}
+
+	reg &= ~BIT(chan->channel / 8);
+	if (mode)
+		reg |= BIT(chan->channel / 8);
+
+	ret = hi8435_writeb(priv, HI8435_PSEN_REG, reg);
+
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static const char * const hi8435_sensing_modes[] = { "GND-Open",
+						     "Supply-Open" };
+
+static const struct iio_enum hi8435_sensing_mode = {
+	.items = hi8435_sensing_modes,
+	.num_items = ARRAY_SIZE(hi8435_sensing_modes),
+	.get = hi8435_get_sensing_mode,
+	.set = hi8435_set_sensing_mode,
+};
+
+static const struct iio_chan_spec_ext_info hi8435_ext_info[] = {
+	IIO_ENUM("sensing_mode", IIO_SEPARATE, &hi8435_sensing_mode),
+	{},
+};
+
+#define HI8435_VOLTAGE_CHANNEL(num)			\
+{							\
+	.type = IIO_VOLTAGE,				\
+	.indexed = 1,					\
+	.channel = num,					\
+	.event_spec = hi8435_events,			\
+	.num_event_specs = ARRAY_SIZE(hi8435_events),	\
+	.ext_info = hi8435_ext_info,			\
+}
+
+static const struct iio_chan_spec hi8435_channels[] = {
+	HI8435_VOLTAGE_CHANNEL(0),
+	HI8435_VOLTAGE_CHANNEL(1),
+	HI8435_VOLTAGE_CHANNEL(2),
+	HI8435_VOLTAGE_CHANNEL(3),
+	HI8435_VOLTAGE_CHANNEL(4),
+	HI8435_VOLTAGE_CHANNEL(5),
+	HI8435_VOLTAGE_CHANNEL(6),
+	HI8435_VOLTAGE_CHANNEL(7),
+	HI8435_VOLTAGE_CHANNEL(8),
+	HI8435_VOLTAGE_CHANNEL(9),
+	HI8435_VOLTAGE_CHANNEL(10),
+	HI8435_VOLTAGE_CHANNEL(11),
+	HI8435_VOLTAGE_CHANNEL(12),
+	HI8435_VOLTAGE_CHANNEL(13),
+	HI8435_VOLTAGE_CHANNEL(14),
+	HI8435_VOLTAGE_CHANNEL(15),
+	HI8435_VOLTAGE_CHANNEL(16),
+	HI8435_VOLTAGE_CHANNEL(17),
+	HI8435_VOLTAGE_CHANNEL(18),
+	HI8435_VOLTAGE_CHANNEL(19),
+	HI8435_VOLTAGE_CHANNEL(20),
+	HI8435_VOLTAGE_CHANNEL(21),
+	HI8435_VOLTAGE_CHANNEL(22),
+	HI8435_VOLTAGE_CHANNEL(23),
+	HI8435_VOLTAGE_CHANNEL(24),
+	HI8435_VOLTAGE_CHANNEL(25),
+	HI8435_VOLTAGE_CHANNEL(26),
+	HI8435_VOLTAGE_CHANNEL(27),
+	HI8435_VOLTAGE_CHANNEL(28),
+	HI8435_VOLTAGE_CHANNEL(29),
+	HI8435_VOLTAGE_CHANNEL(30),
+	HI8435_VOLTAGE_CHANNEL(31),
+	IIO_CHAN_SOFT_TIMESTAMP(32),
+};
+
+static const struct iio_info hi8435_info = {
+	.driver_module = THIS_MODULE,
+	.read_event_config = &hi8435_read_event_config,
+	.write_event_config = hi8435_write_event_config,
+	.read_event_value = &hi8435_read_event_value,
+	.write_event_value = &hi8435_write_event_value,
+	.debugfs_reg_access = &hi8435_debugfs_reg_access,
+};
+
+static void hi8435_iio_push_event(struct iio_dev *idev, unsigned int val)
+{
+	struct hi8435_priv *priv = iio_priv(idev);
+	enum iio_event_direction dir;
+	unsigned int i;
+	unsigned int status = priv->event_prev_val ^ val;
+
+	if (!status)
+		return;
+
+	for_each_set_bit(i, &priv->event_scan_mask, 32) {
+		if (status & BIT(i)) {
+			dir = val & BIT(i) ? IIO_EV_DIR_RISING :
+					     IIO_EV_DIR_FALLING;
+			iio_push_event(idev,
+				       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, i,
+						    IIO_EV_TYPE_THRESH, dir),
+				       iio_get_time_ns());
+		}
+	}
+
+	priv->event_prev_val = val;
+}
+
+static irqreturn_t hi8435_trigger_handler(int irq, void *private)
+{
+	struct iio_poll_func *pf = private;
+	struct iio_dev *idev = pf->indio_dev;
+	struct hi8435_priv *priv = iio_priv(idev);
+	u32 val;
+	int ret;
+
+	ret = hi8435_readl(priv, HI8435_SO31_0_REG, &val);
+	if (ret < 0)
+		goto err_read;
+
+	hi8435_iio_push_event(idev, val);
+
+err_read:
+	iio_trigger_notify_done(idev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int hi8435_probe(struct spi_device *spi)
+{
+	struct iio_dev *idev;
+	struct hi8435_priv *priv;
+	struct gpio_desc *reset_gpio;
+	int ret;
+
+	idev = devm_iio_device_alloc(&spi->dev, sizeof(*priv));
+	if (!idev)
+		return -ENOMEM;
+
+	priv = iio_priv(idev);
+	priv->spi = spi;
+
+	reset_gpio = devm_gpiod_get(&spi->dev, NULL, GPIOD_OUT_LOW);
+	if (IS_ERR(reset_gpio)) {
+		/* chip s/w reset if h/w reset failed */
+		hi8435_writeb(priv, HI8435_CTRL_REG, HI8435_CTRL_SRST);
+		hi8435_writeb(priv, HI8435_CTRL_REG, 0);
+	} else {
+		udelay(5);
+		gpiod_set_value(reset_gpio, 1);
+	}
+
+	spi_set_drvdata(spi, idev);
+	mutex_init(&priv->lock);
+
+	idev->dev.parent	= &spi->dev;
+	idev->name		= spi_get_device_id(spi)->name;
+	idev->modes		= INDIO_DIRECT_MODE;
+	idev->info		= &hi8435_info;
+	idev->channels		= hi8435_channels;
+	idev->num_channels	= ARRAY_SIZE(hi8435_channels);
+
+	/* unmask all events */
+	priv->event_scan_mask = ~(0);
+	/*
+	 * There is a restriction in the chip - the hysteresis can not be odd.
+	 * If the hysteresis is set to odd value then chip gets into lock state
+	 * and not functional anymore.
+	 * After chip reset the thresholds are in undefined state, so we need to
+	 * initialize thresholds to some initial values and then prevent
+	 * userspace setting odd hysteresis.
+	 *
+	 * Set threshold low voltage to 2V, threshold high voltage to 4V
+	 * for both GND-Open and Supply-Open sensing modes.
+	 */
+	priv->threshold_lo[0] = priv->threshold_lo[1] = 2;
+	priv->threshold_hi[0] = priv->threshold_hi[1] = 4;
+	hi8435_writew(priv, HI8435_GOCENHYS_REG, 0x206);
+	hi8435_writew(priv, HI8435_SOCENHYS_REG, 0x206);
+
+	ret = iio_triggered_event_setup(idev, NULL, hi8435_trigger_handler);
+	if (ret)
+		return ret;
+
+	ret = iio_device_register(idev);
+	if (ret < 0) {
+		dev_err(&spi->dev, "unable to register device\n");
+		goto unregister_triggered_event;
+	}
+
+	return 0;
+
+unregister_triggered_event:
+	iio_triggered_event_cleanup(idev);
+	return ret;
+}
+
+static int hi8435_remove(struct spi_device *spi)
+{
+	struct iio_dev *idev = spi_get_drvdata(spi);
+
+	iio_device_unregister(idev);
+	iio_triggered_event_cleanup(idev);
+
+	return 0;
+}
+
+static const struct of_device_id hi8435_dt_ids[] = {
+	{ .compatible = "holt,hi8435" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, hi8435_dt_ids);
+
+static const struct spi_device_id hi8435_id[] = {
+	{ "hi8435", 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, hi8435_id);
+
+static struct spi_driver hi8435_driver = {
+	.driver	= {
+		.name		= DRV_NAME,
+		.of_match_table	= of_match_ptr(hi8435_dt_ids),
+	},
+	.probe		= hi8435_probe,
+	.remove		= hi8435_remove,
+	.id_table	= hi8435_id,
+};
+module_spi_driver(hi8435_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Vladimir Barinov");
+MODULE_DESCRIPTION("HI-8435 threshold detector");
diff --git a/kernel/drivers/iio/adc/max1027.c b/kernel/drivers/iio/adc/max1027.c
index 44bf815ad..41d495c60 100644
--- a/kernel/drivers/iio/adc/max1027.c
+++ b/kernel/drivers/iio/adc/max1027.c
@@ -508,7 +508,7 @@ static int max1027_remove(struct spi_device *spi)
 static struct spi_driver max1027_driver = {
 	.driver = {
 		.name	= "max1027",
-		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(max1027_adc_dt_ids),
 	},
 	.probe		= max1027_probe,
 	.remove		= max1027_remove,
diff --git a/kernel/drivers/iio/adc/max1363.c b/kernel/drivers/iio/adc/max1363.c
index 1b3b74be5..929508e52 100644
--- a/kernel/drivers/iio/adc/max1363.c
+++ b/kernel/drivers/iio/adc/max1363.c
@@ -1007,7 +1007,6 @@ static struct attribute *max1363_event_attributes[] = {
 
 static struct attribute_group max1363_event_attribute_group = {
 	.attrs = max1363_event_attributes,
-	.name = "events",
 };
 
 static int max1363_update_scan_mode(struct iio_dev *indio_dev,
diff --git a/kernel/drivers/iio/adc/mcp320x.c b/kernel/drivers/iio/adc/mcp320x.c
index 8d9c9b921..8569c8e1f 100644
--- a/kernel/drivers/iio/adc/mcp320x.c
+++ b/kernel/drivers/iio/adc/mcp320x.c
@@ -25,6 +25,7 @@
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21290D.pdf  mcp3201
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21034D.pdf  mcp3202
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf  mcp3204/08
+ * http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf  mcp3301
  *
  * 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
@@ -47,6 +48,7 @@ enum {
 	mcp3202,
 	mcp3204,
 	mcp3208,
+	mcp3301,
 };
 
 struct mcp320x_chip_info {
@@ -76,6 +78,7 @@ static int mcp320x_channel_to_tx_data(int device_index,
 	switch (device_index) {
 	case mcp3001:
 	case mcp3201:
+	case mcp3301:
 		return 0;
 	case mcp3002:
 	case mcp3202:
@@ -102,7 +105,7 @@ static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel,
 	adc->tx_buf = mcp320x_channel_to_tx_data(device_index,
 						channel, differential);
 
-	if (device_index != mcp3001 && device_index != mcp3201) {
+	if (device_index != mcp3001 && device_index != mcp3201 && device_index != mcp3301) {
 		ret = spi_sync(adc->spi, &adc->msg);
 		if (ret < 0)
 			return ret;
@@ -125,6 +128,8 @@ static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel,
 	case mcp3204:
 	case mcp3208:
 		return (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4);
+	case mcp3301:
+		return sign_extend32((adc->rx_buf[0] & 0x1f) << 8 | adc->rx_buf[1], 12);
 	default:
 		return -EINVAL;
 	}
@@ -274,6 +279,11 @@ static const struct mcp320x_chip_info mcp320x_chip_infos[] = {
 		.num_channels = ARRAY_SIZE(mcp3208_channels),
 		.resolution = 12
 	},
+	[mcp3301] = {
+		.channels = mcp3201_channels,
+		.num_channels = ARRAY_SIZE(mcp3201_channels),
+		.resolution = 13
+	},
 };
 
 static int mcp320x_probe(struct spi_device *spi)
@@ -299,6 +309,8 @@ static int mcp320x_probe(struct spi_device *spi)
 	indio_dev->channels = chip_info->channels;
 	indio_dev->num_channels = chip_info->num_channels;
 
+	adc->chip_info = chip_info;
+
 	adc->transfer[0].tx_buf = &adc->tx_buf;
 	adc->transfer[0].len = sizeof(adc->tx_buf);
 	adc->transfer[1].rx_buf = adc->rx_buf;
@@ -367,6 +379,9 @@ static const struct of_device_id mcp320x_dt_ids[] = {
 		.compatible = "mcp3208",
 		.data = &mcp320x_chip_infos[mcp3208],
 	}, {
+		.compatible = "mcp3301",
+		.data = &mcp320x_chip_infos[mcp3301],
+	}, {
 	}
 };
 MODULE_DEVICE_TABLE(of, mcp320x_dt_ids);
@@ -381,6 +396,7 @@ static const struct spi_device_id mcp320x_id[] = {
 	{ "mcp3202", mcp3202 },
 	{ "mcp3204", mcp3204 },
 	{ "mcp3208", mcp3208 },
+	{ "mcp3301", mcp3301 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, mcp320x_id);
@@ -388,7 +404,7 @@ MODULE_DEVICE_TABLE(spi, mcp320x_id);
 static struct spi_driver mcp320x_driver = {
 	.driver = {
 		.name = "mcp320x",
-		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(mcp320x_dt_ids),
 	},
 	.probe = mcp320x_probe,
 	.remove = mcp320x_remove,
diff --git a/kernel/drivers/iio/adc/mcp3422.c b/kernel/drivers/iio/adc/mcp3422.c
index b96c63647..355512200 100644
--- a/kernel/drivers/iio/adc/mcp3422.c
+++ b/kernel/drivers/iio/adc/mcp3422.c
@@ -404,7 +404,6 @@ MODULE_DEVICE_TABLE(of, mcp3422_of_match);
 static struct i2c_driver mcp3422_driver = {
 	.driver = {
 		.name = "mcp3422",
-		.owner = THIS_MODULE,
 		.of_match_table = of_match_ptr(mcp3422_of_match),
 	},
 	.probe = mcp3422_probe,
diff --git a/kernel/drivers/iio/adc/qcom-spmi-vadc.c b/kernel/drivers/iio/adc/qcom-spmi-vadc.c
index 0c4618b4d..c2babe50a 100644
--- a/kernel/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/kernel/drivers/iio/adc/qcom-spmi-vadc.c
@@ -839,8 +839,10 @@ static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
 
 	for_each_available_child_of_node(node, child) {
 		ret = vadc_get_dt_channel_data(vadc->dev, &prop, child);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			return ret;
+		}
 
 		vadc->chan_props[index] = prop;
 
diff --git a/kernel/drivers/iio/adc/ti-adc081c.c b/kernel/drivers/iio/adc/ti-adc081c.c
index b3a82b4d1..2c8374f86 100644
--- a/kernel/drivers/iio/adc/ti-adc081c.c
+++ b/kernel/drivers/iio/adc/ti-adc081c.c
@@ -140,7 +140,6 @@ MODULE_DEVICE_TABLE(of, adc081c_of_match);
 static struct i2c_driver adc081c_driver = {
 	.driver = {
 		.name = "adc081c",
-		.owner = THIS_MODULE,
 		.of_match_table = of_match_ptr(adc081c_of_match),
 	},
 	.probe = adc081c_probe,
diff --git a/kernel/drivers/iio/adc/ti-adc128s052.c b/kernel/drivers/iio/adc/ti-adc128s052.c
index 655cb564e..ff6f7f63c 100644
--- a/kernel/drivers/iio/adc/ti-adc128s052.c
+++ b/kernel/drivers/iio/adc/ti-adc128s052.c
@@ -1,9 +1,10 @@
 /*
  * Copyright (C) 2014 Angelo Compagnucci <angelo.compagnucci@gmail.com>
  *
- * Driver for Texas Instruments' ADC128S052 ADC chip.
- * Datasheet can be found here:
+ * Driver for Texas Instruments' ADC128S052 and ADC122S021 ADC chip.
+ * Datasheets can be found here:
  * http://www.ti.com/lit/ds/symlink/adc128s052.pdf
+ * http://www.ti.com/lit/ds/symlink/adc122s021.pdf
  *
  * 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
@@ -16,6 +17,11 @@
 #include <linux/iio/iio.h>
 #include <linux/regulator/consumer.h>
 
+struct adc128_configuration {
+	const struct iio_chan_spec	*channels;
+	u8				num_channels;
+};
+
 struct adc128 {
 	struct spi_device *spi;
 
@@ -92,7 +98,7 @@ static int adc128_read_raw(struct iio_dev *indio_dev,
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \
 	}
 
-static const struct iio_chan_spec adc128_channels[] = {
+static const struct iio_chan_spec adc128s052_channels[] = {
 	ADC128_VOLTAGE_CHANNEL(0),
 	ADC128_VOLTAGE_CHANNEL(1),
 	ADC128_VOLTAGE_CHANNEL(2),
@@ -103,6 +109,16 @@ static const struct iio_chan_spec adc128_channels[] = {
 	ADC128_VOLTAGE_CHANNEL(7),
 };
 
+static const struct iio_chan_spec adc122s021_channels[] = {
+	ADC128_VOLTAGE_CHANNEL(0),
+	ADC128_VOLTAGE_CHANNEL(1),
+};
+
+static const struct adc128_configuration adc128_config[] = {
+	{ adc128s052_channels, ARRAY_SIZE(adc128s052_channels) },
+	{ adc122s021_channels, ARRAY_SIZE(adc122s021_channels) },
+};
+
 static const struct iio_info adc128_info = {
 	.read_raw = adc128_read_raw,
 	.driver_module = THIS_MODULE,
@@ -112,6 +128,7 @@ static int adc128_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
 	struct adc128 *adc;
+	int config = spi_get_device_id(spi)->driver_data;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
@@ -128,8 +145,8 @@ static int adc128_probe(struct spi_device *spi)
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &adc128_info;
 
-	indio_dev->channels = adc128_channels;
-	indio_dev->num_channels = ARRAY_SIZE(adc128_channels);
+	indio_dev->channels = adc128_config[config].channels;
+	indio_dev->num_channels = adc128_config[config].num_channels;
 
 	adc->reg = devm_regulator_get(&spi->dev, "vref");
 	if (IS_ERR(adc->reg))
@@ -157,8 +174,16 @@ static int adc128_remove(struct spi_device *spi)
 	return 0;
 }
 
+static const struct of_device_id adc128_of_match[] = {
+	{ .compatible = "ti,adc128s052", },
+	{ .compatible = "ti,adc122s021", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, adc128_of_match);
+
 static const struct spi_device_id adc128_id[] = {
-	{ "adc128s052", 0},
+	{ "adc128s052", 0},	/* index into adc128_config */
+	{ "adc122s021",	1},
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, adc128_id);
@@ -166,7 +191,7 @@ MODULE_DEVICE_TABLE(spi, adc128_id);
 static struct spi_driver adc128_driver = {
 	.driver = {
 		.name = "adc128s052",
-		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(adc128_of_match),
 	},
 	.probe = adc128_probe,
 	.remove = adc128_remove,
diff --git a/kernel/drivers/iio/adc/ti_am335x_adc.c b/kernel/drivers/iio/adc/ti_am335x_adc.c
index a0e7161f0..c1e05532d 100644
--- a/kernel/drivers/iio/adc/ti_am335x_adc.c
+++ b/kernel/drivers/iio/adc/ti_am335x_adc.c
@@ -37,6 +37,7 @@ struct tiadc_device {
 	u8 channel_step[8];
 	int buffer_en_ch_steps;
 	u16 data[8];
+	u32 open_delay[8], sample_delay[8], step_avg[8];
 };
 
 static unsigned int tiadc_readl(struct tiadc_device *adc, unsigned int reg)
@@ -85,6 +86,7 @@ static u32 get_adc_step_bit(struct tiadc_device *adc_dev, int chan)
 static void tiadc_step_config(struct iio_dev *indio_dev)
 {
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
+	struct device *dev = adc_dev->mfd_tscadc->dev;
 	unsigned int stepconfig;
 	int i, steps = 0;
 
@@ -98,20 +100,47 @@ static void tiadc_step_config(struct iio_dev *indio_dev)
 	 * needs to be given to ADC to digitalize data.
 	 */
 
-	if (iio_buffer_enabled(indio_dev))
-		stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1
-					| STEPCONFIG_MODE_SWCNT;
-	else
-		stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1;
 
 	for (i = 0; i < adc_dev->channels; i++) {
 		int chan;
 
 		chan = adc_dev->channel_line[i];
+
+		if (adc_dev->step_avg[i] > STEPCONFIG_AVG_16) {
+			dev_warn(dev, "chan %d step_avg truncating to %d\n",
+				 chan, STEPCONFIG_AVG_16);
+			adc_dev->step_avg[i] = STEPCONFIG_AVG_16;
+		}
+
+		if (adc_dev->step_avg[i])
+			stepconfig =
+			STEPCONFIG_AVG(ffs(adc_dev->step_avg[i]) - 1) |
+			STEPCONFIG_FIFO1;
+		else
+			stepconfig = STEPCONFIG_FIFO1;
+
+		if (iio_buffer_enabled(indio_dev))
+			stepconfig |= STEPCONFIG_MODE_SWCNT;
+
 		tiadc_writel(adc_dev, REG_STEPCONFIG(steps),
 				stepconfig | STEPCONFIG_INP(chan));
+
+		if (adc_dev->open_delay[i] > STEPDELAY_OPEN_MASK) {
+			dev_warn(dev, "chan %d open delay truncating to 0x3FFFF\n",
+				 chan);
+			adc_dev->open_delay[i] = STEPDELAY_OPEN_MASK;
+		}
+
+		if (adc_dev->sample_delay[i] > 0xFF) {
+			dev_warn(dev, "chan %d sample delay truncating to 0xFF\n",
+				 chan);
+			adc_dev->sample_delay[i] = 0xFF;
+		}
+
 		tiadc_writel(adc_dev, REG_STEPDELAY(steps),
-				STEPCONFIG_OPENDLY);
+				STEPDELAY_OPEN(adc_dev->open_delay[i]) |
+				STEPDELAY_SAMPLE(adc_dev->sample_delay[i]));
+
 		adc_dev->channel_step[i] = steps;
 		steps++;
 	}
@@ -260,7 +289,7 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev,
 		goto error_kfifo_free;
 
 	indio_dev->setup_ops = setup_ops;
-	indio_dev->modes |= INDIO_BUFFER_HARDWARE;
+	indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
 
 	return 0;
 
@@ -395,16 +424,43 @@ static const struct iio_info tiadc_info = {
 	.driver_module = THIS_MODULE,
 };
 
+static int tiadc_parse_dt(struct platform_device *pdev,
+			  struct tiadc_device *adc_dev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct property *prop;
+	const __be32 *cur;
+	int channels = 0;
+	u32 val;
+
+	of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) {
+		adc_dev->channel_line[channels] = val;
+
+		/* Set Default values for optional DT parameters */
+		adc_dev->open_delay[channels] = STEPCONFIG_OPENDLY;
+		adc_dev->sample_delay[channels] = STEPCONFIG_SAMPLEDLY;
+		adc_dev->step_avg[channels] = 16;
+
+		channels++;
+	}
+
+	of_property_read_u32_array(node, "ti,chan-step-avg",
+				   adc_dev->step_avg, channels);
+	of_property_read_u32_array(node, "ti,chan-step-opendelay",
+				   adc_dev->open_delay, channels);
+	of_property_read_u32_array(node, "ti,chan-step-sampledelay",
+				   adc_dev->sample_delay, channels);
+
+	adc_dev->channels = channels;
+	return 0;
+}
+
 static int tiadc_probe(struct platform_device *pdev)
 {
 	struct iio_dev		*indio_dev;
 	struct tiadc_device	*adc_dev;
 	struct device_node	*node = pdev->dev.of_node;
-	struct property		*prop;
-	const __be32		*cur;
 	int			err;
-	u32			val;
-	int			channels = 0;
 
 	if (!node) {
 		dev_err(&pdev->dev, "Could not find valid DT data.\n");
@@ -420,12 +476,7 @@ static int tiadc_probe(struct platform_device *pdev)
 	adc_dev = iio_priv(indio_dev);
 
 	adc_dev->mfd_tscadc = ti_tscadc_dev_get(pdev);
-
-	of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) {
-		adc_dev->channel_line[channels] = val;
-		channels++;
-	}
-	adc_dev->channels = channels;
+	tiadc_parse_dt(pdev, adc_dev);
 
 	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = dev_name(&pdev->dev);
diff --git a/kernel/drivers/iio/adc/twl4030-madc.c b/kernel/drivers/iio/adc/twl4030-madc.c
index 4caecbea4..0c74869a5 100644
--- a/kernel/drivers/iio/adc/twl4030-madc.c
+++ b/kernel/drivers/iio/adc/twl4030-madc.c
@@ -45,13 +45,18 @@
 #include <linux/types.h>
 #include <linux/gfp.h>
 #include <linux/err.h>
+#include <linux/regulator/consumer.h>
 
 #include <linux/iio/iio.h>
 
+#define TWL4030_USB_SEL_MADC_MCPC	(1<<3)
+#define TWL4030_USB_CARKIT_ANA_CTRL	0xBB
+
 /**
  * struct twl4030_madc_data - a container for madc info
  * @dev:		Pointer to device structure for madc
  * @lock:		Mutex protecting this data structure
+ * @regulator:		Pointer to bias regulator for madc
  * @requests:		Array of request struct corresponding to SW1, SW2 and RT
  * @use_second_irq:	IRQ selection (main or co-processor)
  * @imr:		Interrupt mask register of MADC
@@ -60,6 +65,7 @@
 struct twl4030_madc_data {
 	struct device *dev;
 	struct mutex lock;	/* mutex protecting this data structure */
+	struct regulator *usb3v1;
 	struct twl4030_madc_request requests[TWL4030_MADC_NUM_METHODS];
 	bool use_second_irq;
 	u8 imr;
@@ -235,7 +241,7 @@ static int twl4030battery_temperature(int raw_volt)
 	if (ret < 0)
 		return ret;
 
-	curr = ((val & TWL4030_BCI_ITHEN) + 1) * 10;
+	curr = ((val & TWL4030_BCI_ITHSENS) + 1) * 10;
 	/* Getting and calculating the thermistor resistance in ohms */
 	res = volt * 1000 / curr;
 	/* calculating temperature */
@@ -662,10 +668,8 @@ EXPORT_SYMBOL_GPL(twl4030_get_madc_conversion);
  *
  * @madc:	pointer to twl4030_madc_data struct
  * @chan:	can be one of the two values:
- *		TWL4030_BCI_ITHEN
- *		Enables bias current for main battery type reading
- *		TWL4030_BCI_TYPEN
- *		Enables bias current for main battery temperature sensing
+ *		0 - Enables bias current for main battery type reading
+ *		1 - Enables bias current for main battery temperature sensing
  * @on:		enable or disable chan.
  *
  * Function to enable or disable bias current for
@@ -843,6 +847,32 @@ static int twl4030_madc_probe(struct platform_device *pdev)
 	}
 	twl4030_madc = madc;
 
+	/* Configure MADC[3:6] */
+	ret = twl_i2c_read_u8(TWL_MODULE_USB, &regval,
+			TWL4030_USB_CARKIT_ANA_CTRL);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to read reg CARKIT_ANA_CTRL  0x%X\n",
+				TWL4030_USB_CARKIT_ANA_CTRL);
+		goto err_i2c;
+	}
+	regval |= TWL4030_USB_SEL_MADC_MCPC;
+	ret = twl_i2c_write_u8(TWL_MODULE_USB, regval,
+				 TWL4030_USB_CARKIT_ANA_CTRL);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to write reg CARKIT_ANA_CTRL 0x%X\n",
+				TWL4030_USB_CARKIT_ANA_CTRL);
+		goto err_i2c;
+	}
+
+	/* Enable 3v1 bias regulator for MADC[3:6] */
+	madc->usb3v1 = devm_regulator_get(madc->dev, "vusb3v1");
+	if (IS_ERR(madc->usb3v1))
+		return -ENODEV;
+
+	ret = regulator_enable(madc->usb3v1);
+	if (ret)
+		dev_err(madc->dev, "could not enable 3v1 bias regulator\n");
+
 	ret = iio_device_register(iio_dev);
 	if (ret) {
 		dev_err(&pdev->dev, "could not register iio device\n");
@@ -868,6 +898,8 @@ static int twl4030_madc_remove(struct platform_device *pdev)
 	twl4030_madc_set_current_generator(madc, 0, 0);
 	twl4030_madc_set_power(madc, 0);
 
+	regulator_disable(madc->usb3v1);
+
 	return 0;
 }
 
diff --git a/kernel/drivers/iio/adc/twl6030-gpadc.c b/kernel/drivers/iio/adc/twl6030-gpadc.c
index df12c57e6..becbb0aef 100644
--- a/kernel/drivers/iio/adc/twl6030-gpadc.c
+++ b/kernel/drivers/iio/adc/twl6030-gpadc.c
@@ -875,6 +875,7 @@ static const struct of_device_id of_twl6030_match_tbl[] = {
 	},
 	{ /* end */ }
 };
+MODULE_DEVICE_TABLE(of, of_twl6030_match_tbl);
 
 static int twl6030_gpadc_probe(struct platform_device *pdev)
 {
diff --git a/kernel/drivers/iio/adc/vf610_adc.c b/kernel/drivers/iio/adc/vf610_adc.c
index 56292ae45..b10f629cc 100644
--- a/kernel/drivers/iio/adc/vf610_adc.c
+++ b/kernel/drivers/iio/adc/vf610_adc.c
@@ -34,8 +34,11 @@
 #include <linux/err.h>
 
 #include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
 #include <linux/iio/sysfs.h>
-#include <linux/iio/driver.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
 
 /* This will be the driver name the kernel reports */
 #define DRIVER_NAME "vf610-adc"
@@ -68,6 +71,9 @@
 #define VF610_ADC_CLK_DIV8		0x60
 #define VF610_ADC_CLK_MASK		0x60
 #define VF610_ADC_ADLSMP_LONG		0x10
+#define VF610_ADC_ADSTS_SHORT   0x100
+#define VF610_ADC_ADSTS_NORMAL  0x200
+#define VF610_ADC_ADSTS_LONG    0x300
 #define VF610_ADC_ADSTS_MASK		0x300
 #define VF610_ADC_ADLPC_EN		0x80
 #define VF610_ADC_ADHSC_EN		0x400
@@ -98,6 +104,15 @@
 #define VF610_ADC_CALF			0x2
 #define VF610_ADC_TIMEOUT		msecs_to_jiffies(100)
 
+#define DEFAULT_SAMPLE_TIME		1000
+
+/* V at 25°C of 696 mV */
+#define VF610_VTEMP25_3V0		950
+/* V at 25°C of 699 mV */
+#define VF610_VTEMP25_3V3		867
+/* Typical sensor slope coefficient at all temperatures */
+#define VF610_TEMP_SLOPE_COEFF		1840
+
 enum clk_sel {
 	VF610_ADCIOC_BUSCLK_SET,
 	VF610_ADCIOC_ALTCLK_SET,
@@ -118,15 +133,34 @@ enum average_sel {
 	VF610_ADC_SAMPLE_32,
 };
 
+enum conversion_mode_sel {
+	VF610_ADC_CONV_NORMAL,
+	VF610_ADC_CONV_HIGH_SPEED,
+	VF610_ADC_CONV_LOW_POWER,
+};
+
+enum lst_adder_sel {
+	VF610_ADCK_CYCLES_3,
+	VF610_ADCK_CYCLES_5,
+	VF610_ADCK_CYCLES_7,
+	VF610_ADCK_CYCLES_9,
+	VF610_ADCK_CYCLES_13,
+	VF610_ADCK_CYCLES_17,
+	VF610_ADCK_CYCLES_21,
+	VF610_ADCK_CYCLES_25,
+};
+
 struct vf610_adc_feature {
 	enum clk_sel	clk_sel;
 	enum vol_ref	vol_ref;
+	enum conversion_mode_sel conv_mode;
 
 	int	clk_div;
 	int     sample_rate;
 	int	res_mode;
+	u32 lst_adder_index;
+	u32 default_sample_time;
 
-	bool	lpm;
 	bool	calibration;
 	bool	ovwren;
 };
@@ -139,55 +173,51 @@ struct vf610_adc {
 	u32 vref_uv;
 	u32 value;
 	struct regulator *vref;
+
+	u32 max_adck_rate[3];
 	struct vf610_adc_feature adc_feature;
 
 	u32 sample_freq_avail[5];
 
 	struct completion completion;
+	u16 buffer[8];
 };
 
 static const u32 vf610_hw_avgs[] = { 1, 4, 8, 16, 32 };
-
-#define VF610_ADC_CHAN(_idx, _chan_type) {			\
-	.type = (_chan_type),					\
-	.indexed = 1,						\
-	.channel = (_idx),					\
-	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
-	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |	\
-				BIT(IIO_CHAN_INFO_SAMP_FREQ),	\
-}
-
-#define VF610_ADC_TEMPERATURE_CHAN(_idx, _chan_type) {	\
-	.type = (_chan_type),	\
-	.channel = (_idx),		\
-	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),	\
-}
-
-static const struct iio_chan_spec vf610_adc_iio_channels[] = {
-	VF610_ADC_CHAN(0, IIO_VOLTAGE),
-	VF610_ADC_CHAN(1, IIO_VOLTAGE),
-	VF610_ADC_CHAN(2, IIO_VOLTAGE),
-	VF610_ADC_CHAN(3, IIO_VOLTAGE),
-	VF610_ADC_CHAN(4, IIO_VOLTAGE),
-	VF610_ADC_CHAN(5, IIO_VOLTAGE),
-	VF610_ADC_CHAN(6, IIO_VOLTAGE),
-	VF610_ADC_CHAN(7, IIO_VOLTAGE),
-	VF610_ADC_CHAN(8, IIO_VOLTAGE),
-	VF610_ADC_CHAN(9, IIO_VOLTAGE),
-	VF610_ADC_CHAN(10, IIO_VOLTAGE),
-	VF610_ADC_CHAN(11, IIO_VOLTAGE),
-	VF610_ADC_CHAN(12, IIO_VOLTAGE),
-	VF610_ADC_CHAN(13, IIO_VOLTAGE),
-	VF610_ADC_CHAN(14, IIO_VOLTAGE),
-	VF610_ADC_CHAN(15, IIO_VOLTAGE),
-	VF610_ADC_TEMPERATURE_CHAN(26, IIO_TEMP),
-	/* sentinel */
-};
+static const u32 vf610_lst_adder[] = { 3, 5, 7, 9, 13, 17, 21, 25 };
 
 static inline void vf610_adc_calculate_rates(struct vf610_adc *info)
 {
+	struct vf610_adc_feature *adc_feature = &info->adc_feature;
 	unsigned long adck_rate, ipg_rate = clk_get_rate(info->clk);
-	int i;
+	u32 adck_period, lst_addr_min;
+	int divisor, i;
+
+	adck_rate = info->max_adck_rate[adc_feature->conv_mode];
+
+	if (adck_rate) {
+		/* calculate clk divider which is within specification */
+		divisor = ipg_rate / adck_rate;
+		adc_feature->clk_div = 1 << fls(divisor + 1);
+	} else {
+		/* fall-back value using a safe divisor */
+		adc_feature->clk_div = 8;
+	}
+
+	adck_rate = ipg_rate / adc_feature->clk_div;
+
+	/*
+	 * Determine the long sample time adder value to be used based
+	 * on the default minimum sample time provided.
+	 */
+	adck_period = NSEC_PER_SEC / adck_rate;
+	lst_addr_min = adc_feature->default_sample_time / adck_period;
+	for (i = 0; i < ARRAY_SIZE(vf610_lst_adder); i++) {
+		if (vf610_lst_adder[i] > lst_addr_min) {
+			adc_feature->lst_adder_index = i;
+			break;
+		}
+	}
 
 	/*
 	 * Calculate ADC sample frequencies
@@ -198,12 +228,12 @@ static inline void vf610_adc_calculate_rates(struct vf610_adc *info)
 	 * SFCAdder: fixed to 6 ADCK cycles
 	 * AverageNum: 1, 4, 8, 16, 32 samples for hardware average.
 	 * BCT (Base Conversion Time): fixed to 25 ADCK cycles for 12 bit mode
-	 * LSTAdder(Long Sample Time): fixed to 3 ADCK cycles
+	 * LSTAdder(Long Sample Time): 3, 5, 7, 9, 13, 17, 21, 25 ADCK cycles
 	 */
-	adck_rate = ipg_rate / info->adc_feature.clk_div;
 	for (i = 0; i < ARRAY_SIZE(vf610_hw_avgs); i++)
 		info->sample_freq_avail[i] =
-			adck_rate / (6 + vf610_hw_avgs[i] * (25 + 3));
+			adck_rate / (6 + vf610_hw_avgs[i] *
+			 (25 + vf610_lst_adder[adc_feature->lst_adder_index]));
 }
 
 static inline void vf610_adc_cfg_init(struct vf610_adc *info)
@@ -219,10 +249,8 @@ static inline void vf610_adc_cfg_init(struct vf610_adc *info)
 
 	adc_feature->res_mode = 12;
 	adc_feature->sample_rate = 1;
-	adc_feature->lpm = true;
 
-	/* Use a save ADCK which is below 20MHz on all devices */
-	adc_feature->clk_div = 8;
+	adc_feature->conv_mode = VF610_ADC_CONV_LOW_POWER;
 
 	vf610_adc_calculate_rates(info);
 }
@@ -304,10 +332,12 @@ static void vf610_adc_cfg_set(struct vf610_adc *info)
 	cfg_data = readl(info->regs + VF610_REG_ADC_CFG);
 
 	cfg_data &= ~VF610_ADC_ADLPC_EN;
-	if (adc_feature->lpm)
+	if (adc_feature->conv_mode == VF610_ADC_CONV_LOW_POWER)
 		cfg_data |= VF610_ADC_ADLPC_EN;
 
 	cfg_data &= ~VF610_ADC_ADHSC_EN;
+	if (adc_feature->conv_mode == VF610_ADC_CONV_HIGH_SPEED)
+		cfg_data |= VF610_ADC_ADHSC_EN;
 
 	writel(cfg_data, info->regs + VF610_REG_ADC_CFG);
 }
@@ -363,8 +393,40 @@ static void vf610_adc_sample_set(struct vf610_adc *info)
 		break;
 	}
 
-	/* Use the short sample mode */
-	cfg_data &= ~(VF610_ADC_ADLSMP_LONG | VF610_ADC_ADSTS_MASK);
+	/*
+	 * Set ADLSMP and ADSTS based on the Long Sample Time Adder value
+	 * determined.
+	 */
+	switch (adc_feature->lst_adder_index) {
+	case VF610_ADCK_CYCLES_3:
+		break;
+	case VF610_ADCK_CYCLES_5:
+		cfg_data |= VF610_ADC_ADSTS_SHORT;
+		break;
+	case VF610_ADCK_CYCLES_7:
+		cfg_data |= VF610_ADC_ADSTS_NORMAL;
+		break;
+	case VF610_ADCK_CYCLES_9:
+		cfg_data |= VF610_ADC_ADSTS_LONG;
+		break;
+	case VF610_ADCK_CYCLES_13:
+		cfg_data |= VF610_ADC_ADLSMP_LONG;
+		break;
+	case VF610_ADCK_CYCLES_17:
+		cfg_data |= VF610_ADC_ADLSMP_LONG;
+		cfg_data |= VF610_ADC_ADSTS_SHORT;
+		break;
+	case VF610_ADCK_CYCLES_21:
+		cfg_data |= VF610_ADC_ADLSMP_LONG;
+		cfg_data |= VF610_ADC_ADSTS_NORMAL;
+		break;
+	case VF610_ADCK_CYCLES_25:
+		cfg_data |= VF610_ADC_ADLSMP_LONG;
+		cfg_data |= VF610_ADC_ADSTS_NORMAL;
+		break;
+	default:
+		dev_err(info->dev, "error in sample time select\n");
+	}
 
 	/* update hardware average selection */
 	cfg_data &= ~VF610_ADC_AVGS_MASK;
@@ -409,6 +471,94 @@ static void vf610_adc_hw_init(struct vf610_adc *info)
 	vf610_adc_cfg_set(info);
 }
 
+static int vf610_set_conversion_mode(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     unsigned int mode)
+{
+	struct vf610_adc *info = iio_priv(indio_dev);
+
+	mutex_lock(&indio_dev->mlock);
+	info->adc_feature.conv_mode = mode;
+	vf610_adc_calculate_rates(info);
+	vf610_adc_hw_init(info);
+	mutex_unlock(&indio_dev->mlock);
+
+	return 0;
+}
+
+static int vf610_get_conversion_mode(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan)
+{
+	struct vf610_adc *info = iio_priv(indio_dev);
+
+	return info->adc_feature.conv_mode;
+}
+
+static const char * const vf610_conv_modes[] = { "normal", "high-speed",
+						 "low-power" };
+
+static const struct iio_enum vf610_conversion_mode = {
+	.items = vf610_conv_modes,
+	.num_items = ARRAY_SIZE(vf610_conv_modes),
+	.get = vf610_get_conversion_mode,
+	.set = vf610_set_conversion_mode,
+};
+
+static const struct iio_chan_spec_ext_info vf610_ext_info[] = {
+	IIO_ENUM("conversion_mode", IIO_SHARED_BY_DIR, &vf610_conversion_mode),
+	{},
+};
+
+#define VF610_ADC_CHAN(_idx, _chan_type) {			\
+	.type = (_chan_type),					\
+	.indexed = 1,						\
+	.channel = (_idx),					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |	\
+				BIT(IIO_CHAN_INFO_SAMP_FREQ),	\
+	.ext_info = vf610_ext_info,				\
+	.scan_index = (_idx),			\
+	.scan_type = {					\
+		.sign = 'u',				\
+		.realbits = 12,				\
+		.storagebits = 16,			\
+	},						\
+}
+
+#define VF610_ADC_TEMPERATURE_CHAN(_idx, _chan_type) {	\
+	.type = (_chan_type),	\
+	.channel = (_idx),		\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),	\
+	.scan_index = (_idx),					\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = 12,					\
+		.storagebits = 16,				\
+	},							\
+}
+
+static const struct iio_chan_spec vf610_adc_iio_channels[] = {
+	VF610_ADC_CHAN(0, IIO_VOLTAGE),
+	VF610_ADC_CHAN(1, IIO_VOLTAGE),
+	VF610_ADC_CHAN(2, IIO_VOLTAGE),
+	VF610_ADC_CHAN(3, IIO_VOLTAGE),
+	VF610_ADC_CHAN(4, IIO_VOLTAGE),
+	VF610_ADC_CHAN(5, IIO_VOLTAGE),
+	VF610_ADC_CHAN(6, IIO_VOLTAGE),
+	VF610_ADC_CHAN(7, IIO_VOLTAGE),
+	VF610_ADC_CHAN(8, IIO_VOLTAGE),
+	VF610_ADC_CHAN(9, IIO_VOLTAGE),
+	VF610_ADC_CHAN(10, IIO_VOLTAGE),
+	VF610_ADC_CHAN(11, IIO_VOLTAGE),
+	VF610_ADC_CHAN(12, IIO_VOLTAGE),
+	VF610_ADC_CHAN(13, IIO_VOLTAGE),
+	VF610_ADC_CHAN(14, IIO_VOLTAGE),
+	VF610_ADC_CHAN(15, IIO_VOLTAGE),
+	VF610_ADC_TEMPERATURE_CHAN(26, IIO_TEMP),
+	IIO_CHAN_SOFT_TIMESTAMP(32),
+	/* sentinel */
+};
+
 static int vf610_adc_read_data(struct vf610_adc *info)
 {
 	int result;
@@ -434,13 +584,20 @@ static int vf610_adc_read_data(struct vf610_adc *info)
 
 static irqreturn_t vf610_adc_isr(int irq, void *dev_id)
 {
-	struct vf610_adc *info = (struct vf610_adc *)dev_id;
+	struct iio_dev *indio_dev = (struct iio_dev *)dev_id;
+	struct vf610_adc *info = iio_priv(indio_dev);
 	int coco;
 
 	coco = readl(info->regs + VF610_REG_ADC_HS);
 	if (coco & VF610_ADC_HS_COCO0) {
 		info->value = vf610_adc_read_data(info);
-		complete(&info->completion);
+		if (iio_buffer_enabled(indio_dev)) {
+			info->buffer[0] = info->value;
+			iio_push_to_buffers_with_timestamp(indio_dev,
+					info->buffer, iio_get_time_ns());
+			iio_trigger_notify_done(indio_dev->trig);
+		} else
+			complete(&info->completion);
 	}
 
 	return IRQ_HANDLED;
@@ -488,8 +645,12 @@ static int vf610_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_RAW:
 	case IIO_CHAN_INFO_PROCESSED:
 		mutex_lock(&indio_dev->mlock);
-		reinit_completion(&info->completion);
+		if (iio_buffer_enabled(indio_dev)) {
+			mutex_unlock(&indio_dev->mlock);
+			return -EBUSY;
+		}
 
+		reinit_completion(&info->completion);
 		hc_cfg = VF610_ADC_ADCHC(chan->channel);
 		hc_cfg |= VF610_ADC_AIEN;
 		writel(hc_cfg, info->regs + VF610_REG_ADC_HC0);
@@ -510,11 +671,13 @@ static int vf610_read_raw(struct iio_dev *indio_dev,
 			break;
 		case IIO_TEMP:
 			/*
-			* Calculate in degree Celsius times 1000
-			* Using sensor slope of 1.84 mV/°C and
-			* V at 25°C of 696 mV
-			*/
-			*val = 25000 - ((int)info->value - 864) * 1000000 / 1840;
+			 * Calculate in degree Celsius times 1000
+			 * Using the typical sensor slope of 1.84 mV/°C
+			 * and VREFH_ADC at 3.3V, V at 25°C of 699 mV
+			 */
+			*val = 25000 - ((int)info->value - VF610_VTEMP25_3V3) *
+					1000000 / VF610_TEMP_SLOPE_COEFF;
+
 			break;
 		default:
 			mutex_unlock(&indio_dev->mlock);
@@ -569,6 +732,56 @@ static int vf610_write_raw(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
+static int vf610_adc_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct vf610_adc *info = iio_priv(indio_dev);
+	unsigned int channel;
+	int ret;
+	int val;
+
+	ret = iio_triggered_buffer_postenable(indio_dev);
+	if (ret)
+		return ret;
+
+	val = readl(info->regs + VF610_REG_ADC_GC);
+	val |= VF610_ADC_ADCON;
+	writel(val, info->regs + VF610_REG_ADC_GC);
+
+	channel = find_first_bit(indio_dev->active_scan_mask,
+						indio_dev->masklength);
+
+	val = VF610_ADC_ADCHC(channel);
+	val |= VF610_ADC_AIEN;
+
+	writel(val, info->regs + VF610_REG_ADC_HC0);
+
+	return 0;
+}
+
+static int vf610_adc_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct vf610_adc *info = iio_priv(indio_dev);
+	unsigned int hc_cfg = 0;
+	int val;
+
+	val = readl(info->regs + VF610_REG_ADC_GC);
+	val &= ~VF610_ADC_ADCON;
+	writel(val, info->regs + VF610_REG_ADC_GC);
+
+	hc_cfg |= VF610_ADC_CONV_DISABLE;
+	hc_cfg &= ~VF610_ADC_AIEN;
+
+	writel(hc_cfg, info->regs + VF610_REG_ADC_HC0);
+
+	return iio_triggered_buffer_predisable(indio_dev);
+}
+
+static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
+	.postenable = &vf610_adc_buffer_postenable,
+	.predisable = &vf610_adc_buffer_predisable,
+	.validate_scan_mask = &iio_validate_scan_mask_onehot,
+};
+
 static int vf610_adc_reg_access(struct iio_dev *indio_dev,
 			unsigned reg, unsigned writeval,
 			unsigned *readval)
@@ -576,7 +789,7 @@ static int vf610_adc_reg_access(struct iio_dev *indio_dev,
 	struct vf610_adc *info = iio_priv(indio_dev);
 
 	if ((readval == NULL) ||
-		(!(reg % 4) || (reg > VF610_REG_ADC_PCTL)))
+		((reg % 4) || (reg > VF610_REG_ADC_PCTL)))
 		return -EINVAL;
 
 	*readval = readl(info->regs + reg);
@@ -628,7 +841,7 @@ static int vf610_adc_probe(struct platform_device *pdev)
 
 	ret = devm_request_irq(info->dev, irq,
 				vf610_adc_isr, 0,
-				dev_name(&pdev->dev), info);
+				dev_name(&pdev->dev), indio_dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed requesting irq, irq = %d\n", irq);
 		return ret;
@@ -651,6 +864,14 @@ static int vf610_adc_probe(struct platform_device *pdev)
 
 	info->vref_uv = regulator_get_voltage(info->vref);
 
+	of_property_read_u32_array(pdev->dev.of_node, "fsl,adck-max-frequency",
+			info->max_adck_rate, 3);
+
+	ret = of_property_read_u32(pdev->dev.of_node, "min-sample-time",
+			&info->adc_feature.default_sample_time);
+	if (ret)
+		info->adc_feature.default_sample_time = DEFAULT_SAMPLE_TIME;
+
 	platform_set_drvdata(pdev, indio_dev);
 
 	init_completion(&info->completion);
@@ -673,15 +894,23 @@ static int vf610_adc_probe(struct platform_device *pdev)
 	vf610_adc_cfg_init(info);
 	vf610_adc_hw_init(info);
 
+	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+					NULL, &iio_triggered_buffer_setup_ops);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Couldn't initialise the buffer\n");
+		goto error_iio_device_register;
+	}
+
 	ret = iio_device_register(indio_dev);
 	if (ret) {
 		dev_err(&pdev->dev, "Couldn't register the device.\n");
-		goto error_iio_device_register;
+		goto error_adc_buffer_init;
 	}
 
 	return 0;
 
-
+error_adc_buffer_init:
+	iio_triggered_buffer_cleanup(indio_dev);
 error_iio_device_register:
 	clk_disable_unprepare(info->clk);
 error_adc_clk_enable:
@@ -696,6 +925,7 @@ static int vf610_adc_remove(struct platform_device *pdev)
 	struct vf610_adc *info = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
 	regulator_disable(info->vref);
 	clk_disable_unprepare(info->clk);
 
diff --git a/kernel/drivers/iio/adc/xilinx-xadc-core.c b/kernel/drivers/iio/adc/xilinx-xadc-core.c
index ce93bd8e3..02e636a1c 100644
--- a/kernel/drivers/iio/adc/xilinx-xadc-core.c
+++ b/kernel/drivers/iio/adc/xilinx-xadc-core.c
@@ -273,33 +273,13 @@ static void xadc_zynq_unmask_worker(struct work_struct *work)
 		schedule_delayed_work(&xadc->zynq_unmask_work,
 				msecs_to_jiffies(XADC_ZYNQ_UNMASK_TIMEOUT));
 	}
-}
-
-static irqreturn_t xadc_zynq_threaded_interrupt_handler(int irq, void *devid)
-{
-	struct iio_dev *indio_dev = devid;
-	struct xadc *xadc = iio_priv(indio_dev);
-	unsigned int alarm;
-
-	spin_lock_irq(&xadc->lock);
-	alarm = xadc->zynq_alarm;
-	xadc->zynq_alarm = 0;
-	spin_unlock_irq(&xadc->lock);
-
-	xadc_handle_events(indio_dev, xadc_zynq_transform_alarm(alarm));
 
-	/* unmask the required interrupts in timer. */
-	schedule_delayed_work(&xadc->zynq_unmask_work,
-			msecs_to_jiffies(XADC_ZYNQ_UNMASK_TIMEOUT));
-
-	return IRQ_HANDLED;
 }
 
 static irqreturn_t xadc_zynq_interrupt_handler(int irq, void *devid)
 {
 	struct iio_dev *indio_dev = devid;
 	struct xadc *xadc = iio_priv(indio_dev);
-	irqreturn_t ret = IRQ_HANDLED;
 	uint32_t status;
 
 	xadc_read_reg(xadc, XADC_ZYNQ_REG_INTSTS, &status);
@@ -321,18 +301,23 @@ static irqreturn_t xadc_zynq_interrupt_handler(int irq, void *devid)
 
 	status &= XADC_ZYNQ_INT_ALARM_MASK;
 	if (status) {
-		xadc->zynq_alarm |= status;
 		xadc->zynq_masked_alarm |= status;
 		/*
 		 * mask the current event interrupt,
 		 * unmask it when the interrupt is no more active.
 		 */
 		xadc_zynq_update_intmsk(xadc, 0, 0);
-		ret = IRQ_WAKE_THREAD;
+
+		xadc_handle_events(indio_dev,
+				xadc_zynq_transform_alarm(status));
+
+		/* unmask the required interrupts in timer. */
+		schedule_delayed_work(&xadc->zynq_unmask_work,
+				msecs_to_jiffies(XADC_ZYNQ_UNMASK_TIMEOUT));
 	}
 	spin_unlock(&xadc->lock);
 
-	return ret;
+	return IRQ_HANDLED;
 }
 
 #define XADC_ZYNQ_TCK_RATE_MAX 50000000
@@ -437,7 +422,6 @@ static const struct xadc_ops xadc_zynq_ops = {
 	.setup = xadc_zynq_setup,
 	.get_dclk_rate = xadc_zynq_get_dclk_rate,
 	.interrupt_handler = xadc_zynq_interrupt_handler,
-	.threaded_interrupt_handler = xadc_zynq_threaded_interrupt_handler,
 	.update_alarm = xadc_zynq_update_alarm,
 };
 
@@ -857,6 +841,7 @@ static int xadc_read_raw(struct iio_dev *indio_dev,
 			case XADC_REG_VCCINT:
 			case XADC_REG_VCCAUX:
 			case XADC_REG_VREFP:
+			case XADC_REG_VREFN:
 			case XADC_REG_VCCBRAM:
 			case XADC_REG_VCCPINT:
 			case XADC_REG_VCCPAUX:
@@ -1225,9 +1210,8 @@ static int xadc_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_free_samplerate_trigger;
 
-	ret = request_threaded_irq(irq, xadc->ops->interrupt_handler,
-				xadc->ops->threaded_interrupt_handler,
-				0, dev_name(&pdev->dev), indio_dev);
+	ret = request_irq(irq, xadc->ops->interrupt_handler, 0,
+			dev_name(&pdev->dev), indio_dev);
 	if (ret)
 		goto err_clk_disable_unprepare;
 
diff --git a/kernel/drivers/iio/adc/xilinx-xadc.h b/kernel/drivers/iio/adc/xilinx-xadc.h
index 54adc5087..f6f081965 100644
--- a/kernel/drivers/iio/adc/xilinx-xadc.h
+++ b/kernel/drivers/iio/adc/xilinx-xadc.h
@@ -60,7 +60,6 @@ struct xadc {
 
 	enum xadc_external_mux_mode external_mux_mode;
 
-	unsigned int zynq_alarm;
 	unsigned int zynq_masked_alarm;
 	unsigned int zynq_intmask;
 	struct delayed_work zynq_unmask_work;
@@ -79,7 +78,6 @@ struct xadc_ops {
 	void (*update_alarm)(struct xadc *, unsigned int);
 	unsigned long (*get_dclk_rate)(struct xadc *);
 	irqreturn_t (*interrupt_handler)(int, void *);
-	irqreturn_t (*threaded_interrupt_handler)(int, void *);
 
 	unsigned int flags;
 };