Merge tag 'iio-for-4.3b-2' of...

Merge tag 'iio-for-4.3b-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of new device support, features and cleanup for the 4.3 cycle.
Take 2 also includes a fix set that was too late for the 4.2 cycle.

As we had a lot of tools and docs work in this set, I have broken those
out into their own categories in this description.

Fixes from the pull request '4th set of IIO fixes for the 4.2 cycle'.
* Poll functions for both event chardev and the buffer one were returning
  negative error codes (via a positive value).
* A recent change to lsiio adding some error handling that was wrong and
  stopped the tool working.
* bmg160 was missing some dependencies in Kconfig
* berlin2-adc had a misshandled register (wrote a value rather than a bitmap)

New device support
* TI opt3001 light sensor
* TXC PA12 ALS and proximity sensor.
* mcp3301 ADC support (in mcp320x driver)
* ST lsm303agr accelerometer and magnetometer drivers (plus some st-sensors
  common support to allow different WHOAMI register addresses, devices with
  fixed scale and allow interrupt equiped magnetometers).
* ADIS16305, ADIS16367, ADIS16445IMUs (in the adis16400 driver)
* ADIS16266 gyro (in the adis16260 driver)
* ADIS16137 gyro (in the adis16136 driver)

New functionality
* mmc35240 DT bindings.
* Inverse unit conversion macros to aid handing of values written to sysfs
  attributes.

Core cleanup
* Forward declaration of struct iio_trigger to avoid a compile warning.

Driver cleanup / fixes
* mxs-lradc
  - Clarify which parts are supported.
  - Fix spelling erorrs.
  - Missing/extra includes
  - reorder includes
  - add datasheet name listings for all usable channels (to allow them
    to be bound by name from consumer drivers)
* acpi-als - add some function prefixes as per general iio style.
* bmc150_magn - replace a magic value with the existing define.
* vf610 - determine possible sample frequencies taking into account the
  electrical characteristics (defining a minimum sample time)
* dht11
  - whitespace
  - additional docs
  - avoid mulitple assignments in one line
  - Use the new funciton ktime_get_resolution_ns to cleanup a nasty trick
    previously used for timing.
* Fix all drivers that consider 0 a valid IRQ for historical reasons.
* Export I2C module alias info where previously missing (to allow autoprobing)
* Export OF module alias info where previously missing.
* mmc35240 - switch some variables into arrays to improve readability.
* mlx90614 - define some magic numbers for readability.
* bmc150_magn
  - expand area locked by a mutex to cover all the use of the
    data->buffer.
  - use descriptive naming for a mask instead of a magic value.
* berin2-adc
  - pass up an error code rather that a generic error
  - constify the iio_chan_spec
  - some other little tidy ups.
* stk8312
  - fix a dependency on triggered buffers in kconfig
  - add a check for invalid attribute values
  - improve error handling by returning error codes where possible and
    return immediately where relevant
  - rework macro defs to use GENMASK etc
  - change some variable types to reduce unnecessary casting
  - clean up code style
  - drop a local buffer copy for bulk reads and use the one in data->buffer
     instead.
* adis16400 - the adis16448 gyroscope scale was wrong.
* adis16480 - some more wrong scales for various parts.
* adis16300 - has an undocumented product id and serial number registers so
  use them.
* iio_simple_dummy - fix some wrong code indentation.
* bmc150-accel - use the chip ID to detect the chip present rather than
  verifying the expected part was there.  This was in response to a wrong
  ACPI entry on the WinBook TW100.
* mma8452
  - fix _get_hp_filter_index
  - drop a double include
  - pass up an error code rather than rewriting it
  - range check input values to attribute writes
  - register defs tidy up using GENMASK and reordering them to be easier to
    follow.
  - various coding style cleanups
  - put the Kconfig entry in the write place (alphabetically).

Tools related
* Tools cleanup - drop an explicity NULL comparison, some unnecessary braces,
  use the ARRAY_SIZE macro, send error messages to stderr instead of dropping
  them in the middle of normal output.
* Fix tools to allow that scale and offset attributes are optional.
* More tools fixes including allowing true 32bit data (previously an overflow
  prevented more than 31bits)
* Drop a stray header guard that ended up in a c file.
* Make calc_digits static as it isn't exported or in the header.
* Set ci_array pointer to NULL after free as a protection against non safe
  usage of the tools core code.  Also convert a double pointer to a single
  one as the extra level of indirection was unnecessary.

Docs
* DocBook introduction by Daniel Baluta.  Glad we are beginning to
  draw together some more introductory docs to suplement the various
  tools / examples.
* Drop bytes_per_datum sysfs attribute docs as it no longer exists.
* A whole load of missing / fixing of kernel-doc for the core of IIO.
* Document the trigger name sysfs attribute in the ABI docs.
* Minor typos in the ABI docs related to power down modes.

Documentation/ABI/testing/sysfs-bus-iio

@@ -493,7 +493,7 @@ Contact:	linux-iio@vger.kernel.org
 Description:
 		Specifies the output powerdown mode.
 		DAC output stage is disconnected from the amplifier and
-		1kohm_to_gnd: connected	to ground via an 1kOhm resistor,
+		1kohm_to_gnd: connected to ground via an 1kOhm resistor,
 		6kohm_to_gnd: connected to ground via a 6kOhm resistor,
 		20kohm_to_gnd: connected to ground via a 20kOhm resistor,
 		100kohm_to_gnd: connected to ground via an 100kOhm resistor,
@@ -503,9 +503,9 @@ Description:
 		outX_powerdown_mode_available. If Y is not present the
 		mode is shared across all outputs.
 
-What:		/sys/.../iio:deviceX/out_votlageY_powerdown_mode_available
+What:		/sys/.../iio:deviceX/out_voltageY_powerdown_mode_available
 What:		/sys/.../iio:deviceX/out_voltage_powerdown_mode_available
-What:		/sys/.../iio:deviceX/out_altvotlageY_powerdown_mode_available
+What:		/sys/.../iio:deviceX/out_altvoltageY_powerdown_mode_available
 What:		/sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
 KernelVersion:	2.6.38
 Contact:	linux-iio@vger.kernel.org
@@ -1040,13 +1040,6 @@ Contact:	linux-iio@vger.kernel.org
 Description:
 		Number of scans contained by the buffer.
 
-What:		/sys/bus/iio/devices/iio:deviceX/buffer/bytes_per_datum
-KernelVersion:	2.6.37
-Contact:	linux-iio@vger.kernel.org
-Description:
-		Bytes per scan.  Due to alignment fun, the scan may be larger
-		than implied directly by the scan_element parameters.
-
 What:		/sys/bus/iio/devices/iio:deviceX/buffer/enable
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org

Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs

@@ -9,3 +9,12 @@ Description:
 		automated testing or in situations, where other trigger methods
 		are not applicable. For example no RTC or spare GPIOs.
 		X is the IIO index of the trigger.
+
+What:		/sys/bus/iio/devices/triggerX/name
+KernelVersion:	2.6.39
+Contact:	linux-iio@vger.kernel.org
+Description:
+		The name attribute holds a description string for the current
+		trigger. In order to associate the trigger with an IIO device
+		one should write this name string to
+		/sys/bus/iio/devices/iio:deviceY/trigger/current_trigger.

Documentation/DocBook/Makefile

@@ -15,7 +15,7 @@ DOCBOOKS := z8530book.xml device-drivers.xml \
 	    80211.xml debugobjects.xml sh.xml regulator.xml \
 	    alsa-driver-api.xml writing-an-alsa-driver.xml \
 	    tracepoint.xml drm.xml media_api.xml w1.xml \
-	    writing_musb_glue_layer.xml crypto-API.xml
+	    writing_musb_glue_layer.xml crypto-API.xml iio.xml
 
 include Documentation/DocBook/media/Makefile
 

Documentation/devicetree/bindings/iio/adc/mcp320x.txt

@@ -18,6 +18,7 @@ Required properties:
 				"mcp3202"
 				"mcp3204"
 				"mcp3208"
+				"mcp3301"
 
 
 Examples:

Documentation/devicetree/bindings/iio/adc/vf610-adc.txt

@@ -17,6 +17,11 @@ Recommended properties:
   - Frequency in normal mode (ADLPC=0, ADHSC=0)
   - Frequency in high-speed mode (ADLPC=0, ADHSC=1)
   - Frequency in low-power mode (ADLPC=1, ADHSC=0)
+- min-sample-time: Minimum sampling time in nanoseconds. This value has
+  to be chosen according to the conversion mode and the connected analog
+  source resistance (R_as) and capacitance (C_as). Refer the datasheet's
+  operating requirements. A safe default across a wide range of R_as and
+  C_as as well as conversion modes is 1000ns.
 
 Example:
 adc0: adc@4003b000 {

Documentation/devicetree/bindings/iio/magnetometer/mmc35240.txt

+* MEMSIC MMC35240 magnetometer sensor
+
+Required properties:
+
+  - compatible : should be "memsic,mmc35240"
+  - reg : the I2C address of the magnetometer
+
+Example:
+
+mmc35240@30 {
+        compatible = "memsic,mmc35240";
+        reg = <0x30>;
+};

Documentation/devicetree/bindings/iio/st-sensors.txt

@@ -35,6 +35,7 @@ Accelerometers:
 - st,lsm303dl-accel
 - st,lsm303dlm-accel
 - st,lsm330-accel
+- st,lsm303agr-accel
 
 Gyroscopes:
 - st,l3g4200d-gyro
@@ -46,6 +47,7 @@ Gyroscopes:
 - st,lsm330-gyro
 
 Magnetometers:
+- st,lsm303agr-magn
 - st,lsm303dlh-magn
 - st,lsm303dlhc-magn
 - st,lsm303dlm-magn

Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt

-* Freescale i.MX28 LRADC device driver
+* Freescale MXS LRADC device driver
 
 Required properties:
 - compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc"

drivers/iio/accel/Kconfig

@@ -86,18 +86,6 @@ config KXSD9
 	  To compile this driver as a module, choose M here: the module
 	  will be called kxsd9.
 
-config MMA8452
-	tristate "Freescale MMA8452Q Accelerometer Driver"
-	depends on I2C
-	select IIO_BUFFER
-	select IIO_TRIGGERED_BUFFER
-	help
-	  Say yes here to build support for the Freescale MMA8452Q 3-axis
-	  accelerometer.
-
-	  To compile this driver as a module, choose M here: the module
-	  will be called mma8452.
-
 config KXCJK1013
 	tristate "Kionix 3-Axis Accelerometer Driver"
 	depends on I2C
@@ -111,6 +99,18 @@ config KXCJK1013
 	  To compile this driver as a module, choose M here: the module will
 	  be called kxcjk-1013.
 
+config MMA8452
+	tristate "Freescale MMA8452Q Accelerometer Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to build support for the Freescale MMA8452Q 3-axis
+	  accelerometer.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma8452.
+
 config MMA9551_CORE
 	tristate
 
@@ -140,6 +140,8 @@ config MMA9553
 config STK8312
 	tristate "Sensortek STK8312 3-Axis Accelerometer Driver"
 	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to get support for the Sensortek STK8312 3-axis
 	  accelerometer.

drivers/iio/accel/bmc150-accel.c

@@ -151,6 +151,7 @@ struct bmc150_scale_info {
 };
 
 struct bmc150_accel_chip_info {
+	const char *name;
 	u8 chip_id;
 	const struct iio_chan_spec *channels;
 	int num_channels;
@@ -345,63 +346,6 @@ static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t,
 	return 0;
 }
 
-static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
-{
-	int ret;
-
-	ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error: Reading chip id\n");
-		return ret;
-	}
-
-	dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
-	if (ret != data->chip_info->chip_id) {
-		dev_err(&data->client->dev, "Invalid chip %x\n", ret);
-		return -ENODEV;
-	}
-
-	ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
-	if (ret < 0)
-		return ret;
-
-	/* Set Bandwidth */
-	ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0);
-	if (ret < 0)
-		return ret;
-
-	/* Set Default Range */
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_PMU_RANGE,
-					BMC150_ACCEL_DEF_RANGE_4G);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_pmu_range\n");
-		return ret;
-	}
-
-	data->range = BMC150_ACCEL_DEF_RANGE_4G;
-
-	/* Set default slope duration and thresholds */
-	data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
-	data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
-	ret = bmc150_accel_update_slope(data);
-	if (ret < 0)
-		return ret;
-
-	/* Set default as latched interrupts */
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_RST_LATCH,
-					BMC150_ACCEL_INT_MODE_LATCH_INT |
-					BMC150_ACCEL_INT_MODE_LATCH_RESET);
-	if (ret < 0) {
-		dev_err(&data->client->dev,
-			"Error writing reg_int_rst_latch\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val,
 			       int *val2)
 {
@@ -1119,6 +1063,7 @@ enum {
 
 static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
 	[bmc150] = {
+		.name = "BMC150A",
 		.chip_id = 0xFA,
 		.channels = bmc150_accel_channels,
 		.num_channels = ARRAY_SIZE(bmc150_accel_channels),
@@ -1128,6 +1073,7 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
 				 {76590, BMC150_ACCEL_DEF_RANGE_16G} },
 	},
 	[bmi055] = {
+		.name = "BMI055A",
 		.chip_id = 0xFA,
 		.channels = bmc150_accel_channels,
 		.num_channels = ARRAY_SIZE(bmc150_accel_channels),
@@ -1137,6 +1083,7 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
 				 {76590, BMC150_ACCEL_DEF_RANGE_16G} },
 	},
 	[bma255] = {
+		.name = "BMA0255",
 		.chip_id = 0xFA,
 		.channels = bmc150_accel_channels,
 		.num_channels = ARRAY_SIZE(bmc150_accel_channels),
@@ -1146,6 +1093,7 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
 				 {76590, BMC150_ACCEL_DEF_RANGE_16G} },
 	},
 	[bma250e] = {
+		.name = "BMA250E",
 		.chip_id = 0xF9,
 		.channels = bma250e_accel_channels,
 		.num_channels = ARRAY_SIZE(bma250e_accel_channels),
@@ -1155,6 +1103,7 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
 				 {306457, BMC150_ACCEL_DEF_RANGE_16G} },
 	},
 	[bma222e] = {
+		.name = "BMA222E",
 		.chip_id = 0xF8,
 		.channels = bma222e_accel_channels,
 		.num_channels = ARRAY_SIZE(bma222e_accel_channels),
@@ -1164,6 +1113,7 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
 				 {1225831, BMC150_ACCEL_DEF_RANGE_16G} },
 	},
 	[bma280] = {
+		.name = "BMA0280",
 		.chip_id = 0xFB,
 		.channels = bma280_accel_channels,
 		.num_channels = ARRAY_SIZE(bma280_accel_channels),
@@ -1410,20 +1360,6 @@ static irqreturn_t bmc150_accel_irq_handler(int irq, void *private)
 	return IRQ_NONE;
 }
 
-static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data)
-{
-	const struct acpi_device_id *id;
-
-	id = acpi_match_device(dev->driver->acpi_match_table, dev);
-
-	if (!id)
-		return NULL;
-
-	*data = (int)id->driver_data;
-
-	return dev_name(dev);
-}
-
 static int bmc150_accel_gpio_probe(struct i2c_client *client,
 				   struct bmc150_accel_data *data)
 {
@@ -1618,6 +1554,70 @@ static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
 	.postdisable = bmc150_accel_buffer_postdisable,
 };
 
+static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
+{
+	int ret, i;
+
+	ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error: Reading chip id\n");
+		return ret;
+	}
+
+	dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
+	for (i = 0; i < ARRAY_SIZE(bmc150_accel_chip_info_tbl); i++) {
+		if (bmc150_accel_chip_info_tbl[i].chip_id == ret) {
+			data->chip_info = &bmc150_accel_chip_info_tbl[i];
+			break;
+		}
+	}
+
+	if (!data->chip_info) {
+		dev_err(&data->client->dev, "Unsupported chip %x\n", ret);
+		return -ENODEV;
+	}
+
+	ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Set Bandwidth */
+	ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Set Default Range */
+	ret = i2c_smbus_write_byte_data(data->client,
+					BMC150_ACCEL_REG_PMU_RANGE,
+					BMC150_ACCEL_DEF_RANGE_4G);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_pmu_range\n");
+		return ret;
+	}
+
+	data->range = BMC150_ACCEL_DEF_RANGE_4G;
+
+	/* Set default slope duration and thresholds */
+	data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
+	data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
+	ret = bmc150_accel_update_slope(data);
+	if (ret < 0)
+		return ret;
+
+	/* Set default as latched interrupts */
+	ret = i2c_smbus_write_byte_data(data->client,
+					BMC150_ACCEL_REG_INT_RST_LATCH,
+					BMC150_ACCEL_INT_MODE_LATCH_INT |
+					BMC150_ACCEL_INT_MODE_LATCH_RESET);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"Error writing reg_int_rst_latch\n");
+		return ret;
+	}
+
+	return 0;
+}
+
 static int bmc150_accel_probe(struct i2c_client *client,
 			      const struct i2c_device_id *id)
 {
@@ -1625,7 +1625,6 @@ static int bmc150_accel_probe(struct i2c_client *client,
 	struct iio_dev *indio_dev;
 	int ret;
 	const char *name = NULL;
-	int chip_id = 0;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 	if (!indio_dev)
@@ -1635,15 +1634,8 @@ static int bmc150_accel_probe(struct i2c_client *client,
 	i2c_set_clientdata(client, indio_dev);
 	data->client = client;
 
-	if (id) {
+	if (id)
 		name = id->name;
-		chip_id = id->driver_data;
-	}
-
-	if (ACPI_HANDLE(&client->dev))
-		name = bmc150_accel_match_acpi_device(&client->dev, &chip_id);
-
-	data->chip_info = &bmc150_accel_chip_info_tbl[chip_id];
 
 	ret = bmc150_accel_chip_init(data);
 	if (ret < 0)
@@ -1654,7 +1646,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
 	indio_dev->dev.parent = &client->dev;
 	indio_dev->channels = data->chip_info->channels;
 	indio_dev->num_channels = data->chip_info->num_channels;
-	indio_dev->name = name;
+	indio_dev->name = name ? name : data->chip_info->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &bmc150_accel_info;
 
@@ -1670,7 +1662,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
 	if (client->irq < 0)
 		client->irq = bmc150_accel_gpio_probe(client, data);
 
-	if (client->irq >= 0) {
+	if (client->irq > 0) {
 		ret = devm_request_threaded_irq(
 						&client->dev, client->irq,
 						bmc150_accel_irq_handler,

drivers/iio/accel/kxcjk-1013.c

@@ -1240,7 +1240,7 @@ static int kxcjk1013_probe(struct i2c_client *client,
 	if (client->irq < 0)
 		client->irq = kxcjk1013_gpio_probe(client, data);
 
-	if (client->irq >= 0) {
+	if (client->irq > 0) {
 		ret = devm_request_threaded_irq(&client->dev, client->irq,
 						kxcjk1013_data_rdy_trig_poll,
 						kxcjk1013_event_handler,

drivers/iio/accel/mma9553.c

@@ -1149,7 +1149,7 @@ static int mma9553_probe(struct i2c_client *client,
 	if (client->irq < 0)
 		client->irq = mma9553_gpio_probe(client);
 
-	if (client->irq >= 0) {
+	if (client->irq > 0) {
 		ret = devm_request_threaded_irq(&client->dev, client->irq,
 						mma9553_irq_handler,
 						mma9553_event_handler,

drivers/iio/accel/st_accel.h

@@ -26,6 +26,7 @@
 #define LSM303DLH_ACCEL_DEV_NAME	"lsm303dlh_accel"
 #define LSM303DLM_ACCEL_DEV_NAME	"lsm303dlm_accel"
 #define LSM330_ACCEL_DEV_NAME		"lsm330_accel"
+#define LSM303AGR_ACCEL_DEV_NAME	"lsm303agr_accel"
 
 /**
 * struct st_sensors_platform_data - default accel platform data

drivers/iio/accel/st_accel_core.c

@@ -226,12 +226,14 @@ static const struct iio_chan_spec st_accel_16bit_channels[] = {
 static const struct st_sensor_settings st_accel_sensors_settings[] = {
 	{
 		.wai = ST_ACCEL_1_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LIS3DH_ACCEL_DEV_NAME,
 			[1] = LSM303DLHC_ACCEL_DEV_NAME,
 			[2] = LSM330D_ACCEL_DEV_NAME,
 			[3] = LSM330DL_ACCEL_DEV_NAME,
 			[4] = LSM330DLC_ACCEL_DEV_NAME,
+			[5] = LSM303AGR_ACCEL_DEV_NAME,
 		},
 		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 		.odr = {
@@ -297,6 +299,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 	},
 	{
 		.wai = ST_ACCEL_2_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LIS331DLH_ACCEL_DEV_NAME,
 			[1] = LSM303DL_ACCEL_DEV_NAME,
@@ -359,6 +362,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 	},
 	{
 		.wai = ST_ACCEL_3_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LSM330_ACCEL_DEV_NAME,
 		},
@@ -437,6 +441,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 	},
 	{
 		.wai = ST_ACCEL_4_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LIS3LV02DL_ACCEL_DEV_NAME,
 		},
@@ -494,6 +499,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 	},
 	{
 		.wai = ST_ACCEL_5_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LIS331DL_ACCEL_DEV_NAME,
 		},

drivers/iio/accel/st_accel_i2c.c

@@ -68,6 +68,10 @@ static const struct of_device_id st_accel_of_match[] = {
 		.compatible = "st,lsm330-accel",
 		.data = LSM330_ACCEL_DEV_NAME,
 	},
+	{
+		.compatible = "st,lsm303agr-accel",
+		.data = LSM303AGR_ACCEL_DEV_NAME,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_accel_of_match);
@@ -116,6 +120,7 @@ static const struct i2c_device_id st_accel_id_table[] = {
 	{ LSM303DL_ACCEL_DEV_NAME },
 	{ LSM303DLM_ACCEL_DEV_NAME },
 	{ LSM330_ACCEL_DEV_NAME },
+	{ LSM303AGR_ACCEL_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_accel_id_table);

drivers/iio/accel/st_accel_spi.c

@@ -57,6 +57,7 @@ static const struct spi_device_id st_accel_id_table[] = {
 	{ LSM303DL_ACCEL_DEV_NAME },
 	{ LSM303DLM_ACCEL_DEV_NAME },
 	{ LSM330_ACCEL_DEV_NAME },
+	{ LSM303AGR_ACCEL_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_accel_id_table);

drivers/iio/accel/stk8312.c

@@ -37,16 +37,16 @@
 #define STK8312_REG_OTPDATA		0x3E
 #define STK8312_REG_OTPCTRL		0x3F
 
-#define STK8312_MODE_ACTIVE		0x01
+#define STK8312_MODE_ACTIVE		BIT(0)
 #define STK8312_MODE_STANDBY		0x00
-#define STK8312_DREADY_BIT		0x10
-#define STK8312_INT_MODE		0xC0
-#define STK8312_RNG_MASK		0xC0
-#define STK8312_SR_MASK			0x07
-#define STK8312_SR_400HZ_IDX		0
+#define STK8312_MODE_INT_AH_PP		0xC0	/* active-high, push-pull */
+#define STK8312_DREADY_BIT		BIT(4)
+#define STK8312_RNG_6G			1
 #define STK8312_RNG_SHIFT		6
-#define STK8312_READ_RETRIES		16
-#define STK8312_ALL_CHANNEL_MASK	7
+#define STK8312_RNG_MASK		GENMASK(7, 6)
+#define STK8312_SR_MASK			GENMASK(2, 0)
+#define STK8312_SR_400HZ_IDX		0
+#define STK8312_ALL_CHANNEL_MASK	GENMASK(2, 0)
 #define STK8312_ALL_CHANNEL_SIZE	3
 
 #define STK8312_DRIVER_NAME		"stk8312"
@@ -69,8 +69,8 @@ static const int stk8312_scale_table[][2] = {
 };
 
 static const struct {
-	u16 val;
-	u32 val2;
+	int val;
+	int val2;
 } stk8312_samp_freq_table[] = {
 	{400, 0}, {200, 0}, {100, 0}, {50, 0}, {25, 0},
 	{12, 500000}, {6, 250000}, {3, 125000}
@@ -103,7 +103,7 @@ static const struct iio_chan_spec stk8312_channels[] = {
 struct stk8312_data {
 	struct i2c_client *client;
 	struct mutex lock;
-	int range;
+	u8 range;
 	u8 sample_rate_idx;
 	u8 mode;
 	struct iio_trigger *dready_trig;
@@ -144,22 +144,25 @@ static int stk8312_otp_init(struct stk8312_data *data)
 		if (ret < 0)
 			goto exit_err;
 		count--;
-	} while (!(ret & 0x80) && count > 0);
+	} while (!(ret & BIT(7)) && count > 0);
 
-	if (count == 0)
+	if (count == 0) {
+		ret = -ETIMEDOUT;
 		goto exit_err;
+	}
 
 	ret = i2c_smbus_read_byte_data(client, STK8312_REG_OTPDATA);
+	if (ret == 0)
+		ret = -EINVAL;
 	if (ret < 0)
 		goto exit_err;
 
-	ret = i2c_smbus_write_byte_data(data->client,
-			STK8312_REG_AFECTRL, ret);
+	ret = i2c_smbus_write_byte_data(data->client, STK8312_REG_AFECTRL, ret);
 	if (ret < 0)
 		goto exit_err;
 	msleep(150);
 
-	return ret;
+	return 0;
 
 exit_err:
 	dev_err(&client->dev, "failed to initialize sensor\n");
@@ -203,8 +206,11 @@ static int stk8312_set_interrupts(struct stk8312_data *data, u8 int_mask)
 		return ret;
 
 	ret = i2c_smbus_write_byte_data(client, STK8312_REG_INTSU, int_mask);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(&client->dev, "failed to set interrupts\n");
+		stk8312_set_mode(data, mode);
+		return ret;
+	}
 
 	return stk8312_set_mode(data, mode);
 }
@@ -228,7 +234,7 @@ static int stk8312_data_rdy_trigger_set_state(struct iio_trigger *trig,
 
 	data->dready_trigger_on = state;
 
-	return ret;
+	return 0;
 }
 
 static const struct iio_trigger_ops stk8312_trigger_ops = {
@@ -236,7 +242,7 @@ static const struct iio_trigger_ops stk8312_trigger_ops = {
 	.owner = THIS_MODULE,
 };
 
-static int stk8312_set_sample_rate(struct stk8312_data *data, int rate)
+static int stk8312_set_sample_rate(struct stk8312_data *data, u8 rate)
 {
 	int ret;
 	u8 masked_reg;
@@ -253,20 +259,24 @@ static int stk8312_set_sample_rate(struct stk8312_data *data, int rate)
 		return ret;
 
 	ret = i2c_smbus_read_byte_data(client, STK8312_REG_SR);
-	if (ret < 0) {
-		dev_err(&client->dev, "failed to set sampling rate\n");
-		return ret;
-	}
+	if (ret < 0)
+		goto err_activate;
 
 	masked_reg = (ret & (~STK8312_SR_MASK)) | rate;
 
 	ret = i2c_smbus_write_byte_data(client, STK8312_REG_SR, masked_reg);
 	if (ret < 0)
-		dev_err(&client->dev, "failed to set sampling rate\n");
-	else
-		data->sample_rate_idx = rate;
+		goto err_activate;
+
+	data->sample_rate_idx = rate;
 
 	return stk8312_set_mode(data, mode);
+
+err_activate:
+	dev_err(&client->dev, "failed to set sampling rate\n");
+	stk8312_set_mode(data, mode);
+
+	return ret;
 }
 
 static int stk8312_set_range(struct stk8312_data *data, u8 range)
@@ -288,21 +298,25 @@ static int stk8312_set_range(struct stk8312_data *data, u8 range)
 		return ret;
 
 	ret = i2c_smbus_read_byte_data(client, STK8312_REG_STH);
-	if (ret < 0) {
-		dev_err(&client->dev, "failed to change sensor range\n");
-		return ret;
-	}
+	if (ret < 0)
+		goto err_activate;
 
 	masked_reg = ret & (~STK8312_RNG_MASK);
 	masked_reg |= range << STK8312_RNG_SHIFT;
 
 	ret = i2c_smbus_write_byte_data(client, STK8312_REG_STH, masked_reg);
 	if (ret < 0)
-		dev_err(&client->dev, "failed to change sensor range\n");
-	else
-		data->range = range;
+		goto err_activate;
+
+	data->range = range;
 
 	return stk8312_set_mode(data, mode);
+
+err_activate:
+	dev_err(&client->dev, "failed to change sensor range\n");
+	stk8312_set_mode(data, mode);
+
+	return ret;
 }
 
 static int stk8312_read_accel(struct stk8312_data *data, u8 address)
@@ -335,18 +349,21 @@ static int stk8312_read_raw(struct iio_dev *indio_dev,
 		ret = stk8312_set_mode(data, data->mode | STK8312_MODE_ACTIVE);
 		if (ret < 0) {
 			mutex_unlock(&data->lock);
-			return -EINVAL;
+			return ret;
 		}
 		ret = stk8312_read_accel(data, chan->address);
 		if (ret < 0) {
 			stk8312_set_mode(data,
 					 data->mode & (~STK8312_MODE_ACTIVE));
 			mutex_unlock(&data->lock);
-			return -EINVAL;
+			return ret;
 		}
 		*val = sign_extend32(ret, 7);
-		stk8312_set_mode(data, data->mode & (~STK8312_MODE_ACTIVE));
+		ret = stk8312_set_mode(data,
+				       data->mode & (~STK8312_MODE_ACTIVE));
 		mutex_unlock(&data->lock);
+		if (ret < 0)
+			return ret;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		*val = stk8312_scale_table[data->range - 1][0];
@@ -418,7 +435,6 @@ static irqreturn_t stk8312_trigger_handler(int irq, void *p)
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct stk8312_data *data = iio_priv(indio_dev);
 	int bit, ret, i = 0;
-	u8 buffer[STK8312_ALL_CHANNEL_SIZE];
 
 	mutex_lock(&data->lock);
 	/*
@@ -429,18 +445,15 @@ static irqreturn_t stk8312_trigger_handler(int irq, void *p)
 		ret = i2c_smbus_read_i2c_block_data(data->client,
 						    STK8312_REG_XOUT,
 						    STK8312_ALL_CHANNEL_SIZE,
-						    buffer);
+						    data->buffer);
 		if (ret < STK8312_ALL_CHANNEL_SIZE) {
 			dev_err(&data->client->dev, "register read failed\n");
 			mutex_unlock(&data->lock);
 			goto err;
 		}
-		data->buffer[0] = buffer[0];
-		data->buffer[1] = buffer[1];
-		data->buffer[2] = buffer[2];
 	} else {
 		for_each_set_bit(bit, indio_dev->active_scan_mask,
-			   indio_dev->masklength) {
+				 indio_dev->masklength) {
 			ret = stk8312_read_accel(data, bit);
 			if (ret < 0) {
 				mutex_unlock(&data->lock);
@@ -547,11 +560,12 @@ static int stk8312_probe(struct i2c_client *client,
 		return ret;
 	}
 	data->sample_rate_idx = STK8312_SR_400HZ_IDX;
-	ret = stk8312_set_range(data, 1);
+	ret = stk8312_set_range(data, STK8312_RNG_6G);
 	if (ret < 0)
 		return ret;
 
-	ret = stk8312_set_mode(data, STK8312_INT_MODE | STK8312_MODE_ACTIVE);
+	ret = stk8312_set_mode(data,
+			       STK8312_MODE_INT_AH_PP | STK8312_MODE_ACTIVE);
 	if (ret < 0)
 		return ret;
 
@@ -606,7 +620,7 @@ static int stk8312_probe(struct i2c_client *client,
 		goto err_buffer_cleanup;
 	}
 
-	return ret;
+	return 0;
 
 err_buffer_cleanup:
 	iio_triggered_buffer_cleanup(indio_dev);
@@ -662,6 +676,7 @@ static const struct i2c_device_id stk8312_i2c_id[] = {
 	{"STK8312", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(i2c, stk8312_i2c_id);
 
 static const struct acpi_device_id stk8312_acpi_id[] = {
 	{"STK8312", 0},
@@ -672,7 +687,7 @@ MODULE_DEVICE_TABLE(acpi, stk8312_acpi_id);
 
 static struct i2c_driver stk8312_driver = {
 	.driver = {
-		.name = "stk8312",
+		.name = STK8312_DRIVER_NAME,
 		.pm = STK8312_PM_OPS,
 		.acpi_match_table = ACPI_PTR(stk8312_acpi_id),
 	},

drivers/iio/accel/stk8ba50.c

@@ -572,6 +572,7 @@ static const struct i2c_device_id stk8ba50_i2c_id[] = {
 	{"stk8ba50", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(i2c, stk8ba50_i2c_id);
 
 static const struct acpi_device_id stk8ba50_acpi_id[] = {
 	{"STK8BA50", 0},

drivers/iio/adc/Kconfig

@@ -228,8 +228,8 @@ config MCP320X
 	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.

drivers/iio/adc/berlin2-adc.c

@@ -26,7 +26,7 @@
 #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)		(BIT(x) << 5)	/* 0-15 */
+#define  BERLIN2_SM_CTRL_ADC_SEL(x)		((x) << 5)	/* 0-15 */
 #define  BERLIN2_SM_CTRL_ADC_SEL_MASK		(0xf << 5)
 #define  BERLIN2_SM_CTRL_ADC_POWER		BIT(9)
 #define  BERLIN2_SM_CTRL_ADC_CLKSEL_DIV2	(0x0 << 10)
@@ -53,14 +53,14 @@
 #define  BERLIN2_SM_ADC_MASK			0x3ff
 #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	0xf
+#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	(0xf << 16)
+#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			0xfff
+#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 */
@@ -86,7 +86,7 @@ struct berlin2_adc_priv {
 			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
 		}
 
-static struct iio_chan_spec berlin2_adc_channels[] = {
+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 */
@@ -103,7 +103,6 @@ static struct iio_chan_spec berlin2_adc_channels[] = {
 	BERLIN2_ADC_CHANNEL(7, IIO_VOLTAGE),	/* reserved */
 	IIO_CHAN_SOFT_TIMESTAMP(8),		/* timestamp */
 };
-#define BERLIN2_N_CHANNELS	ARRAY_SIZE(berlin2_adc_channels)
 
 static int berlin2_adc_read(struct iio_dev *indio_dev, int channel)
 {
@@ -221,7 +220,7 @@ static int berlin2_adc_read_raw(struct iio_dev *indio_dev,
 			return temp;
 
 		if (temp > 2047)
-			temp = -(4096 - temp);
+			temp -= 4096;
 
 		/* Convert to milli Celsius */
 		*val = ((temp * 100000) / 264 - 270000);
@@ -286,8 +285,7 @@ static int berlin2_adc_probe(struct platform_device *pdev)
 	int irq, tsen_irq;
 	int ret;
 
-	indio_dev = devm_iio_device_alloc(&pdev->dev,
-					  sizeof(struct berlin2_adc_priv));
+	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
 	if (!indio_dev)
 		return -ENOMEM;
 
@@ -301,11 +299,11 @@ static int berlin2_adc_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq_byname(pdev, "adc");
 	if (irq < 0)
-		return -ENODEV;
+		return irq;
 
 	tsen_irq = platform_get_irq_byname(pdev, "tsen");
 	if (tsen_irq < 0)
-		return -ENODEV;
+		return tsen_irq;
 
 	ret = devm_request_irq(&pdev->dev, irq, berlin2_adc_irq, 0,
 			pdev->dev.driver->name, indio_dev);
@@ -325,8 +323,8 @@ static int berlin2_adc_probe(struct platform_device *pdev)
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &berlin2_adc_info;
 
-	indio_dev->num_channels = BERLIN2_N_CHANNELS;
 	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,

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)
@@ -368,6 +378,9 @@ static const struct of_device_id mcp320x_dt_ids[] = {
 	}, {
 		.compatible = "mcp3208",
 		.data = &mcp320x_chip_infos[mcp3208],
+	}, {
+		.compatible = "mcp3301",
+		.data = &mcp320x_chip_infos[mcp3301],
 	}, {
 	}
 };
@@ -383,6 +396,7 @@ static const struct spi_device_id mcp320x_id[] = {
 	{ "mcp3202", mcp3202 },
 	{ "mcp3204", mcp3204 },
 	{ "mcp3208", mcp3208 },
+	{ "mcp3301", mcp3301 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, mcp320x_id);

drivers/iio/adc/vf610_adc.c

@@ -68,6 +68,9 @@
 #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 +101,8 @@
 #define VF610_ADC_CALF			0x2
 #define VF610_ADC_TIMEOUT		msecs_to_jiffies(100)
 
+#define DEFAULT_SAMPLE_TIME		1000
+
 enum clk_sel {
 	VF610_ADCIOC_BUSCLK_SET,
 	VF610_ADCIOC_ALTCLK_SET,
@@ -124,6 +129,17 @@ enum conversion_mode_sel {
 	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;
@@ -132,6 +148,8 @@ struct vf610_adc_feature {
 	int	clk_div;
 	int     sample_rate;
 	int	res_mode;
+	u32 lst_adder_index;
+	u32 default_sample_time;
 
 	bool	calibration;
 	bool	ovwren;
@@ -155,11 +173,13 @@ struct vf610_adc {
 };
 
 static const u32 vf610_hw_avgs[] = { 1, 4, 8, 16, 32 };
+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);
+	u32 adck_period, lst_addr_min;
 	int divisor, i;
 
 	adck_rate = info->max_adck_rate[adc_feature->conv_mode];
@@ -173,6 +193,19 @@ static inline void vf610_adc_calculate_rates(struct vf610_adc *info)
 		adc_feature->clk_div = 8;
 	}
 
+	/*
+	 * 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
 	 * Sample time unit is ADCK cycles. ADCK clk source is ipg clock,
@@ -182,12 +215,13 @@ 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)
@@ -347,8 +381,40 @@ 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;
@@ -713,6 +779,11 @@ static int vf610_adc_probe(struct platform_device *pdev)
 	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);

drivers/iio/common/st_sensors/st_sensors_core.c

@@ -126,6 +126,9 @@ static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs)
 	int err, i = 0;
 	struct st_sensor_data *sdata = iio_priv(indio_dev);
 
+	if (sdata->sensor_settings->fs.addr == 0)
+		return 0;
+
 	err = st_sensors_match_fs(sdata->sensor_settings, fs, &i);
 	if (err < 0)
 		goto st_accel_set_fullscale_error;
@@ -479,46 +482,43 @@ int st_sensors_check_device_support(struct iio_dev *indio_dev,
 			int num_sensors_list,
 			const struct st_sensor_settings *sensor_settings)
 {
-	u8 wai;
 	int i, n, err;
+	u8 wai;
 	struct st_sensor_data *sdata = iio_priv(indio_dev);
 
-	err = sdata->tf->read_byte(&sdata->tb, sdata->dev,
-					ST_SENSORS_DEFAULT_WAI_ADDRESS, &wai);
-	if (err < 0) {
-		dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n");
-		goto read_wai_error;
-	}
-
 	for (i = 0; i < num_sensors_list; i++) {
-		if (sensor_settings[i].wai == wai)
+		for (n = 0; n < ST_SENSORS_MAX_4WAI; n++) {
+			if (strcmp(indio_dev->name,
+				sensor_settings[i].sensors_supported[n]) == 0) {
+				break;
+			}
+		}
+		if (n < ST_SENSORS_MAX_4WAI)
 			break;
 	}
-	if (i == num_sensors_list)
-		goto device_not_supported;
+	if (i == num_sensors_list) {
+		dev_err(&indio_dev->dev, "device name %s not recognized.\n",
+							indio_dev->name);
+		return -ENODEV;
+	}
 
-	for (n = 0; n < ARRAY_SIZE(sensor_settings[i].sensors_supported); n++) {
-		if (strcmp(indio_dev->name,
-				&sensor_settings[i].sensors_supported[n][0]) == 0)
-			break;
+	err = sdata->tf->read_byte(&sdata->tb, sdata->dev,
+					sensor_settings[i].wai_addr, &wai);
+	if (err < 0) {
+		dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n");
+		return err;
 	}
-	if (n == ARRAY_SIZE(sensor_settings[i].sensors_supported)) {
-		dev_err(&indio_dev->dev, "device name \"%s\" and WhoAmI (0x%02x) mismatch",
-			indio_dev->name, wai);
-		goto sensor_name_mismatch;
+
+	if (sensor_settings[i].wai != wai) {
+		dev_err(&indio_dev->dev, "%s: WhoAmI mismatch (0x%x).\n",
+						indio_dev->name, wai);
+		return -EINVAL;
 	}
 
 	sdata->sensor_settings =
 			(struct st_sensor_settings *)&sensor_settings[i];
 
 	return i;
-
-device_not_supported:
-	dev_err(&indio_dev->dev, "device not supported: WhoAmI (0x%x).\n", wai);
-sensor_name_mismatch:
-	err = -ENODEV;
-read_wai_error:
-	return err;
 }
 EXPORT_SYMBOL(st_sensors_check_device_support);
 

drivers/iio/gyro/Kconfig

@@ -53,7 +53,8 @@ config ADXRS450
 config BMG160
 	tristate "BOSCH BMG160 Gyro Sensor"
 	depends on I2C
-	select IIO_TRIGGERED_BUFFER if IIO_BUFFER
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
 	  driver. This driver also supports BMI055 gyroscope.

drivers/iio/gyro/adis16136.c

@@ -473,6 +473,7 @@ enum adis16136_id {
 	ID_ADIS16133,
 	ID_ADIS16135,
 	ID_ADIS16136,
+	ID_ADIS16137,
 };
 
 static const struct adis16136_chip_info adis16136_chip_info[] = {
@@ -488,6 +489,10 @@ static const struct adis16136_chip_info adis16136_chip_info[] = {
 		.precision = IIO_DEGREE_TO_RAD(450),
 		.fullscale = 24623,
 	},
+	[ID_ADIS16137] = {
+		.precision = IIO_DEGREE_TO_RAD(1000),
+		.fullscale = 24609,
+	},
 };
 
 static int adis16136_probe(struct spi_device *spi)
@@ -557,6 +562,7 @@ static const struct spi_device_id adis16136_ids[] = {
 	{ "adis16133", ID_ADIS16133 },
 	{ "adis16135", ID_ADIS16135 },
 	{ "adis16136", ID_ADIS16136 },
+	{ "adis16137", ID_ADIS16137 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, adis16136_ids);

drivers/iio/gyro/adis16260.c

@@ -101,19 +101,24 @@
 #define ADIS16260_SCAN_TEMP	3
 #define ADIS16260_SCAN_ANGL	4
 
-/* Power down the device */
-static int adis16260_stop_device(struct iio_dev *indio_dev)
-{
-	struct adis *adis = iio_priv(indio_dev);
-	int ret;
-	u16 val = ADIS16260_SLP_CNT_POWER_OFF;
+struct adis16260_chip_info {
+	unsigned int gyro_max_val;
+	unsigned int gyro_max_scale;
+	const struct iio_chan_spec *channels;
+	unsigned int num_channels;
+};
 
-	ret = adis_write_reg_16(adis, ADIS16260_SLP_CNT, val);
-	if (ret)
-		dev_err(&indio_dev->dev, "problem with turning device off: SLP_CNT");
+struct adis16260 {
+	const struct adis16260_chip_info *info;
 
-	return ret;
-}
+	struct adis adis;
+};
+
+enum adis16260_type {
+	ADIS16251,
+	ADIS16260,
+	ADIS16266,
+};
 
 static const struct iio_chan_spec adis16260_channels[] = {
 	ADIS_GYRO_CHAN(X, ADIS16260_GYRO_OUT, ADIS16260_SCAN_GYRO,
@@ -131,6 +136,55 @@ static const struct iio_chan_spec adis16260_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(5),
 };
 
+static const struct iio_chan_spec adis16266_channels[] = {
+	ADIS_GYRO_CHAN(X, ADIS16260_GYRO_OUT, ADIS16260_SCAN_GYRO,
+		BIT(IIO_CHAN_INFO_CALIBBIAS) |
+		BIT(IIO_CHAN_INFO_CALIBSCALE),
+		BIT(IIO_CHAN_INFO_SAMP_FREQ), 14),
+	ADIS_TEMP_CHAN(ADIS16260_TEMP_OUT, ADIS16260_SCAN_TEMP,
+		BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
+	ADIS_SUPPLY_CHAN(ADIS16260_SUPPLY_OUT, ADIS16260_SCAN_SUPPLY,
+		BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
+	ADIS_AUX_ADC_CHAN(ADIS16260_AUX_ADC, ADIS16260_SCAN_AUX_ADC,
+		BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct adis16260_chip_info adis16260_chip_info_table[] = {
+	[ADIS16251] = {
+		.gyro_max_scale = 80,
+		.gyro_max_val = IIO_RAD_TO_DEGREE(4368),
+		.channels = adis16260_channels,
+		.num_channels = ARRAY_SIZE(adis16260_channels),
+	},
+	[ADIS16260] = {
+		.gyro_max_scale = 320,
+		.gyro_max_val = IIO_RAD_TO_DEGREE(4368),
+		.channels = adis16260_channels,
+		.num_channels = ARRAY_SIZE(adis16260_channels),
+	},
+	[ADIS16266] = {
+		.gyro_max_scale = 14000,
+		.gyro_max_val = IIO_RAD_TO_DEGREE(3357),
+		.channels = adis16266_channels,
+		.num_channels = ARRAY_SIZE(adis16266_channels),
+	},
+};
+
+/* Power down the device */
+static int adis16260_stop_device(struct iio_dev *indio_dev)
+{
+	struct adis16260 *adis16260 = iio_priv(indio_dev);
+	int ret;
+	u16 val = ADIS16260_SLP_CNT_POWER_OFF;
+
+	ret = adis_write_reg_16(&adis16260->adis, ADIS16260_SLP_CNT, val);
+	if (ret)
+		dev_err(&indio_dev->dev, "problem with turning device off: SLP_CNT");
+
+	return ret;
+}
+
 static const u8 adis16260_addresses[][2] = {
 	[ADIS16260_SCAN_GYRO] = { ADIS16260_GYRO_OFF, ADIS16260_GYRO_SCALE },
 };
@@ -140,7 +194,9 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 			      int *val, int *val2,
 			      long mask)
 {
-	struct adis *adis = iio_priv(indio_dev);
+	struct adis16260 *adis16260 = iio_priv(indio_dev);
+	const struct adis16260_chip_info *info = adis16260->info;
+	struct adis *adis = &adis16260->adis;
 	int ret;
 	u8 addr;
 	s16 val16;
@@ -152,15 +208,9 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
-			*val = 0;
-			if (spi_get_device_id(adis->spi)->driver_data) {
-				/* 0.01832 degree / sec */
-				*val2 = IIO_DEGREE_TO_RAD(18320);
-			} else {
-				/* 0.07326 degree / sec */
-				*val2 = IIO_DEGREE_TO_RAD(73260);
-			}
-			return IIO_VAL_INT_PLUS_MICRO;
+			*val = info->gyro_max_scale;
+			*val2 = info->gyro_max_val;
+			return IIO_VAL_FRACTIONAL;
 		case IIO_INCLI:
 			*val = 0;
 			*val2 = IIO_DEGREE_TO_RAD(36630);
@@ -224,7 +274,8 @@ static int adis16260_write_raw(struct iio_dev *indio_dev,
 			       int val2,
 			       long mask)
 {
-	struct adis *adis = iio_priv(indio_dev);
+	struct adis16260 *adis16260 = iio_priv(indio_dev);
+	struct adis *adis = &adis16260->adis;
 	int ret;
 	u8 addr;
 	u8 t;
@@ -305,35 +356,42 @@ static const struct adis_data adis16260_data = {
 
 static int adis16260_probe(struct spi_device *spi)
 {
+	const struct spi_device_id *id;
+	struct adis16260 *adis16260;
 	struct iio_dev *indio_dev;
-	struct adis *adis;
 	int ret;
 
+	id = spi_get_device_id(spi);
+	if (!id)
+		return -ENODEV;
+
 	/* setup the industrialio driver allocated elements */
-	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adis));
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adis16260));
 	if (!indio_dev)
 		return -ENOMEM;
-	adis = iio_priv(indio_dev);
+	adis16260 = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
 	spi_set_drvdata(spi, indio_dev);
 
-	indio_dev->name = spi_get_device_id(spi)->name;
+	adis16260->info = &adis16260_chip_info_table[id->driver_data];
+
+	indio_dev->name = id->name;
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->info = &adis16260_info;
-	indio_dev->channels = adis16260_channels;
-	indio_dev->num_channels = ARRAY_SIZE(adis16260_channels);
+	indio_dev->channels = adis16260->info->channels;
+	indio_dev->num_channels = adis16260->info->num_channels;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis_init(adis, indio_dev, spi, &adis16260_data);
+	ret = adis_init(&adis16260->adis, indio_dev, spi, &adis16260_data);
 	if (ret)
 		return ret;
 
-	ret = adis_setup_buffer_and_trigger(adis, indio_dev, NULL);
+	ret = adis_setup_buffer_and_trigger(&adis16260->adis, indio_dev, NULL);
 	if (ret)
 		return ret;
 
 	/* Get the device into a sane initial state */
-	ret = adis_initial_startup(adis);
+	ret = adis_initial_startup(&adis16260->adis);
 	if (ret)
 		goto error_cleanup_buffer_trigger;
 	ret = iio_device_register(indio_dev);
@@ -343,18 +401,18 @@ static int adis16260_probe(struct spi_device *spi)
 	return 0;
 
 error_cleanup_buffer_trigger:
-	adis_cleanup_buffer_and_trigger(adis, indio_dev);
+	adis_cleanup_buffer_and_trigger(&adis16260->adis, indio_dev);
 	return ret;
 }
 
 static int adis16260_remove(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct adis *adis = iio_priv(indio_dev);
+	struct adis16260 *adis16260 = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
 	adis16260_stop_device(indio_dev);
-	adis_cleanup_buffer_and_trigger(adis, indio_dev);
+	adis_cleanup_buffer_and_trigger(&adis16260->adis, indio_dev);
 
 	return 0;
 }
@@ -364,11 +422,12 @@ static int adis16260_remove(struct spi_device *spi)
  * support for the on chip filtering.
  */
 static const struct spi_device_id adis16260_id[] = {
-	{"adis16260", 0},
-	{"adis16265", 0},
-	{"adis16250", 0},
-	{"adis16255", 0},
-	{"adis16251", 1},
+	{"adis16260", ADIS16260},
+	{"adis16265", ADIS16260},
+	{"adis16266", ADIS16266},
+	{"adis16250", ADIS16260},
+	{"adis16255", ADIS16260},
+	{"adis16251", ADIS16251},
 	{}
 };
 MODULE_DEVICE_TABLE(spi, adis16260_id);

drivers/iio/gyro/st_gyro_core.c

@@ -131,6 +131,7 @@ static const struct iio_chan_spec st_gyro_16bit_channels[] = {
 static const struct st_sensor_settings st_gyro_sensors_settings[] = {
 	{
 		.wai = ST_GYRO_1_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = L3G4200D_GYRO_DEV_NAME,
 			[1] = LSM330DL_GYRO_DEV_NAME,
@@ -190,6 +191,7 @@ static const struct st_sensor_settings st_gyro_sensors_settings[] = {
 	},
 	{
 		.wai = ST_GYRO_2_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = L3GD20_GYRO_DEV_NAME,
 			[1] = LSM330D_GYRO_DEV_NAME,
@@ -252,6 +254,7 @@ static const struct st_sensor_settings st_gyro_sensors_settings[] = {
 	},
 	{
 		.wai = ST_GYRO_3_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = L3GD20_GYRO_DEV_NAME,
 		},

drivers/iio/humidity/dht11.c

@@ -33,6 +33,7 @@
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
+#include <linux/timekeeping.h>
 
 #include <linux/iio/iio.h>
 
@@ -46,7 +47,8 @@
  * Note that when reading the sensor actually 84 edges are detected, but
  * since the last edge is not significant, we only store 83:
  */
-#define DHT11_EDGES_PER_READ (2*DHT11_BITS_PER_READ + DHT11_EDGES_PREAMBLE + 1)
+#define DHT11_EDGES_PER_READ (2 * DHT11_BITS_PER_READ + \
+			      DHT11_EDGES_PREAMBLE + 1)
 
 /* Data transmission timing (nano seconds) */
 #define DHT11_START_TRANSMISSION	18  /* ms */
@@ -62,6 +64,7 @@ struct dht11 {
 	int				irq;
 
 	struct completion		completion;
+	/* The iio sysfs interface doesn't prevent concurrent reads: */
 	struct mutex			lock;
 
 	s64				timestamp;
@@ -87,32 +90,20 @@ static unsigned char dht11_decode_byte(int *timing, int threshold)
 	return ret;
 }
 
-static int dht11_decode(struct dht11 *dht11, int offset)
+static int dht11_decode(struct dht11 *dht11, int offset, int timeres)
 {
-	int i, t, timing[DHT11_BITS_PER_READ], threshold,
-		timeres = DHT11_SENSOR_RESPONSE;
+	int i, t, timing[DHT11_BITS_PER_READ], threshold;
 	unsigned char temp_int, temp_dec, hum_int, hum_dec, checksum;
 
-	/* Calculate timestamp resolution */
-	for (i = 1; i < dht11->num_edges; ++i) {
-		t = dht11->edges[i].ts - dht11->edges[i-1].ts;
-		if (t > 0 && t < timeres)
-			timeres = t;
-	}
-	if (2*timeres > DHT11_DATA_BIT_HIGH) {
-		pr_err("dht11: timeresolution %d too bad for decoding\n",
-			timeres);
-		return -EIO;
-	}
 	threshold = DHT11_DATA_BIT_HIGH / timeres;
-	if (DHT11_DATA_BIT_LOW/timeres + 1 >= threshold)
+	if (DHT11_DATA_BIT_LOW / timeres + 1 >= threshold)
 		pr_err("dht11: WARNING: decoding ambiguous\n");
 
 	/* scale down with timeres and check validity */
 	for (i = 0; i < DHT11_BITS_PER_READ; ++i) {
-		t = dht11->edges[offset + 2*i + 2].ts -
-			dht11->edges[offset + 2*i + 1].ts;
-		if (!dht11->edges[offset + 2*i + 1].value)
+		t = dht11->edges[offset + 2 * i + 2].ts -
+			dht11->edges[offset + 2 * i + 1].ts;
+		if (!dht11->edges[offset + 2 * i + 1].value)
 			return -EIO;  /* lost synchronisation */
 		timing[i] = t / timeres;
 	}
@@ -126,7 +117,7 @@ static int dht11_decode(struct dht11 *dht11, int offset)
 	if (((hum_int + hum_dec + temp_int + temp_dec) & 0xff) != checksum)
 		return -EIO;
 
-	dht11->timestamp = iio_get_time_ns();
+	dht11->timestamp = ktime_get_real_ns();
 	if (hum_int < 20) {  /* DHT22 */
 		dht11->temperature = (((temp_int & 0x7f) << 8) + temp_dec) *
 					((temp_int & 0x80) ? -100 : 100);
@@ -154,7 +145,7 @@ static irqreturn_t dht11_handle_irq(int irq, void *data)
 
 	/* TODO: Consider making the handler safe for IRQ sharing */
 	if (dht11->num_edges < DHT11_EDGES_PER_READ && dht11->num_edges >= 0) {
-		dht11->edges[dht11->num_edges].ts = iio_get_time_ns();
+		dht11->edges[dht11->num_edges].ts = ktime_get_real_ns();
 		dht11->edges[dht11->num_edges++].value =
 						gpio_get_value(dht11->gpio);
 
@@ -166,14 +157,26 @@ static irqreturn_t dht11_handle_irq(int irq, void *data)
 }
 
 static int dht11_read_raw(struct iio_dev *iio_dev,
-			const struct iio_chan_spec *chan,
+			  const struct iio_chan_spec *chan,
 			int *val, int *val2, long m)
 {
 	struct dht11 *dht11 = iio_priv(iio_dev);
-	int ret;
+	int ret, timeres;
 
 	mutex_lock(&dht11->lock);
-	if (dht11->timestamp + DHT11_DATA_VALID_TIME < iio_get_time_ns()) {
+	if (dht11->timestamp + DHT11_DATA_VALID_TIME < ktime_get_real_ns()) {
+		timeres = ktime_get_resolution_ns();
+		if (DHT11_DATA_BIT_HIGH < 2 * timeres) {
+			dev_err(dht11->dev, "timeresolution %dns too low\n",
+				timeres);
+			/* In theory a better clock could become available
+			 * at some point ... and there is no error code
+			 * that really fits better.
+			 */
+			ret = -EAGAIN;
+			goto err;
+		}
+
 		reinit_completion(&dht11->completion);
 
 		dht11->num_edges = 0;
@@ -192,13 +195,13 @@ static int dht11_read_raw(struct iio_dev *iio_dev,
 			goto err;
 
 		ret = wait_for_completion_killable_timeout(&dht11->completion,
-								 HZ);
+							   HZ);
 
 		free_irq(dht11->irq, iio_dev);
 
 		if (ret == 0 && dht11->num_edges < DHT11_EDGES_PER_READ - 1) {
 			dev_err(&iio_dev->dev,
-					"Only %d signal edges detected\n",
+				"Only %d signal edges detected\n",
 					dht11->num_edges);
 			ret = -ETIMEDOUT;
 		}
@@ -206,9 +209,10 @@ static int dht11_read_raw(struct iio_dev *iio_dev,
 			goto err;
 
 		ret = dht11_decode(dht11,
-				dht11->num_edges == DHT11_EDGES_PER_READ ?
+				   dht11->num_edges == DHT11_EDGES_PER_READ ?
 					DHT11_EDGES_PREAMBLE :
-					DHT11_EDGES_PREAMBLE - 2);
+					DHT11_EDGES_PREAMBLE - 2,
+				timeres);
 		if (ret)
 			goto err;
 	}
@@ -261,9 +265,10 @@ static int dht11_probe(struct platform_device *pdev)
 	dht11 = iio_priv(iio);
 	dht11->dev = dev;
 
-	dht11->gpio = ret = of_get_gpio(node, 0);
+	ret = of_get_gpio(node, 0);
 	if (ret < 0)
 		return ret;
+	dht11->gpio = ret;
 	ret = devm_gpio_request_one(dev, dht11->gpio, GPIOF_IN, pdev->name);
 	if (ret)
 		return ret;
@@ -274,7 +279,7 @@ static int dht11_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	dht11->timestamp = iio_get_time_ns() - DHT11_DATA_VALID_TIME - 1;
+	dht11->timestamp = ktime_get_real_ns() - DHT11_DATA_VALID_TIME - 1;
 	dht11->num_edges = -1;
 
 	platform_set_drvdata(pdev, iio);

drivers/iio/imu/adis16400_core.c

@@ -139,7 +139,9 @@ enum adis16400_chip_variant {
 	ADIS16360,
 	ADIS16362,
 	ADIS16364,
+	ADIS16367,
 	ADIS16400,
+	ADIS16445,
 	ADIS16448,
 };
 
@@ -622,6 +624,17 @@ static const struct iio_chan_spec adis16400_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
 };
 
+static const struct iio_chan_spec adis16445_channels[] = {
+	ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 16),
+	ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 16),
+	ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 16),
+	ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 16),
+	ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 16),
+	ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 16),
+	ADIS16400_TEMP_CHAN(ADIS16448_TEMP_OUT, 12),
+	IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
+};
+
 static const struct iio_chan_spec adis16448_channels[] = {
 	ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 16),
 	ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 16),
@@ -696,7 +709,8 @@ static struct adis16400_chip_info adis16400_chips[] = {
 	[ADIS16300] = {
 		.channels = adis16300_channels,
 		.num_channels = ARRAY_SIZE(adis16300_channels),
-		.flags = ADIS16400_HAS_SLOW_MODE,
+		.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
+				ADIS16400_HAS_SERIAL_NUMBER,
 		.gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
 		.accel_scale_micro = 5884,
 		.temp_scale_nano = 140000000, /* 0.14 C */
@@ -763,6 +777,18 @@ static struct adis16400_chip_info adis16400_chips[] = {
 		.set_freq = adis16400_set_freq,
 		.get_freq = adis16400_get_freq,
 	},
+	[ADIS16367] = {
+		.channels = adis16350_channels,
+		.num_channels = ARRAY_SIZE(adis16350_channels),
+		.flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
+				ADIS16400_HAS_SERIAL_NUMBER,
+		.gyro_scale_micro = IIO_DEGREE_TO_RAD(2000), /* 0.2 deg/s */
+		.accel_scale_micro = IIO_G_TO_M_S_2(3333), /* 3.333 mg */
+		.temp_scale_nano = 136000000, /* 0.136 C */
+		.temp_offset = 25000000 / 136000, /* 25 C = 0x00 */
+		.set_freq = adis16400_set_freq,
+		.get_freq = adis16400_get_freq,
+	},
 	[ADIS16400] = {
 		.channels = adis16400_channels,
 		.num_channels = ARRAY_SIZE(adis16400_channels),
@@ -774,13 +800,26 @@ static struct adis16400_chip_info adis16400_chips[] = {
 		.set_freq = adis16400_set_freq,
 		.get_freq = adis16400_get_freq,
 	},
+	[ADIS16445] = {
+		.channels = adis16445_channels,
+		.num_channels = ARRAY_SIZE(adis16445_channels),
+		.flags = ADIS16400_HAS_PROD_ID |
+				ADIS16400_HAS_SERIAL_NUMBER |
+				ADIS16400_BURST_DIAG_STAT,
+		.gyro_scale_micro = IIO_DEGREE_TO_RAD(10000), /* 0.01 deg/s */
+		.accel_scale_micro = IIO_G_TO_M_S_2(250), /* 1/4000 g */
+		.temp_scale_nano = 73860000, /* 0.07386 C */
+		.temp_offset = 31000000 / 73860, /* 31 C = 0x00 */
+		.set_freq = adis16334_set_freq,
+		.get_freq = adis16334_get_freq,
+	},
 	[ADIS16448] = {
 		.channels = adis16448_channels,
 		.num_channels = ARRAY_SIZE(adis16448_channels),
 		.flags = ADIS16400_HAS_PROD_ID |
 				ADIS16400_HAS_SERIAL_NUMBER |
 				ADIS16400_BURST_DIAG_STAT,
-		.gyro_scale_micro = IIO_DEGREE_TO_RAD(10000), /* 0.01 deg/s */
+		.gyro_scale_micro = IIO_DEGREE_TO_RAD(40000), /* 0.04 deg/s */
 		.accel_scale_micro = IIO_G_TO_M_S_2(833), /* 1/1200 g */
 		.temp_scale_nano = 73860000, /* 0.07386 C */
 		.temp_offset = 31000000 / 73860, /* 31 C = 0x00 */
@@ -926,6 +965,7 @@ static int adis16400_remove(struct spi_device *spi)
 
 static const struct spi_device_id adis16400_id[] = {
 	{"adis16300", ADIS16300},
+	{"adis16305", ADIS16300},
 	{"adis16334", ADIS16334},
 	{"adis16350", ADIS16350},
 	{"adis16354", ADIS16350},
@@ -934,8 +974,10 @@ static const struct spi_device_id adis16400_id[] = {
 	{"adis16362", ADIS16362},
 	{"adis16364", ADIS16364},
 	{"adis16365", ADIS16360},
+	{"adis16367", ADIS16367},
 	{"adis16400", ADIS16400},
 	{"adis16405", ADIS16400},
+	{"adis16445", ADIS16445},
 	{"adis16448", ADIS16448},
 	{}
 };

drivers/iio/imu/adis16480.c

@@ -110,6 +110,10 @@
 struct adis16480_chip_info {
 	unsigned int num_channels;
 	const struct iio_chan_spec *channels;
+	unsigned int gyro_max_val;
+	unsigned int gyro_max_scale;
+	unsigned int accel_max_val;
+	unsigned int accel_max_scale;
 };
 
 struct adis16480 {
@@ -497,19 +501,21 @@ static int adis16480_set_filter_freq(struct iio_dev *indio_dev,
 static int adis16480_read_raw(struct iio_dev *indio_dev,
 	const struct iio_chan_spec *chan, int *val, int *val2, long info)
 {
+	struct adis16480 *st = iio_priv(indio_dev);
+
 	switch (info) {
 	case IIO_CHAN_INFO_RAW:
 		return adis_single_conversion(indio_dev, chan, 0, val);
 	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
-			*val = 0;
-			*val2 = IIO_DEGREE_TO_RAD(20000); /* 0.02 degree/sec */
-			return IIO_VAL_INT_PLUS_MICRO;
+			*val = st->chip_info->gyro_max_scale;
+			*val2 = st->chip_info->gyro_max_val;
+			return IIO_VAL_FRACTIONAL;
 		case IIO_ACCEL:
-			*val = 0;
-			*val2 = IIO_G_TO_M_S_2(800); /* 0.8 mg */
-			return IIO_VAL_INT_PLUS_MICRO;
+			*val = st->chip_info->accel_max_scale;
+			*val2 = st->chip_info->accel_max_val;
+			return IIO_VAL_FRACTIONAL;
 		case IIO_MAGN:
 			*val = 0;
 			*val2 = 100; /* 0.0001 gauss */
@@ -674,18 +680,39 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
 	[ADIS16375] = {
 		.channels = adis16485_channels,
 		.num_channels = ARRAY_SIZE(adis16485_channels),
+		/*
+		 * storing the value in rad/degree and the scale in degree
+		 * gives us the result in rad and better precession than
+		 * storing the scale directly in rad.
+		 */
+		.gyro_max_val = IIO_RAD_TO_DEGREE(22887),
+		.gyro_max_scale = 300,
+		.accel_max_val = IIO_M_S_2_TO_G(21973),
+		.accel_max_scale = 18,
 	},
 	[ADIS16480] = {
 		.channels = adis16480_channels,
 		.num_channels = ARRAY_SIZE(adis16480_channels),
+		.gyro_max_val = IIO_RAD_TO_DEGREE(22500),
+		.gyro_max_scale = 450,
+		.accel_max_val = IIO_M_S_2_TO_G(12500),
+		.accel_max_scale = 5,
 	},
 	[ADIS16485] = {
 		.channels = adis16485_channels,
 		.num_channels = ARRAY_SIZE(adis16485_channels),
+		.gyro_max_val = IIO_RAD_TO_DEGREE(22500),
+		.gyro_max_scale = 450,
+		.accel_max_val = IIO_M_S_2_TO_G(20000),
+		.accel_max_scale = 5,
 	},
 	[ADIS16488] = {
 		.channels = adis16480_channels,
 		.num_channels = ARRAY_SIZE(adis16480_channels),
+		.gyro_max_val = IIO_RAD_TO_DEGREE(22500),
+		.gyro_max_scale = 450,
+		.accel_max_val = IIO_M_S_2_TO_G(22500),
+		.accel_max_scale = 18,
 	},
 };
 

drivers/iio/imu/kmx61.c

@@ -1363,7 +1363,7 @@ static int kmx61_probe(struct i2c_client *client,
 	if (client->irq < 0)
 		client->irq = kmx61_gpio_probe(client, data);
 
-	if (client->irq >= 0) {
+	if (client->irq > 0) {
 		ret = devm_request_threaded_irq(&client->dev, client->irq,
 						kmx61_data_rdy_trig_poll,
 						kmx61_event_handler,
@@ -1445,10 +1445,10 @@ static int kmx61_probe(struct i2c_client *client,
 err_iio_unregister_acc:
 	iio_device_unregister(data->acc_indio_dev);
 err_buffer_cleanup_mag:
-	if (client->irq >= 0)
+	if (client->irq > 0)
 		iio_triggered_buffer_cleanup(data->mag_indio_dev);
 err_buffer_cleanup_acc:
-	if (client->irq >= 0)
+	if (client->irq > 0)
 		iio_triggered_buffer_cleanup(data->acc_indio_dev);
 err_trigger_unregister_motion:
 	iio_trigger_unregister(data->motion_trig);
@@ -1472,7 +1472,7 @@ static int kmx61_remove(struct i2c_client *client)
 	iio_device_unregister(data->acc_indio_dev);
 	iio_device_unregister(data->mag_indio_dev);
 
-	if (client->irq >= 0) {
+	if (client->irq > 0) {
 		iio_triggered_buffer_cleanup(data->acc_indio_dev);
 		iio_triggered_buffer_cleanup(data->mag_indio_dev);
 		iio_trigger_unregister(data->acc_dready_trig);

drivers/iio/industrialio-buffer.c

@@ -91,9 +91,16 @@ static bool iio_buffer_ready(struct iio_dev *indio_dev, struct iio_buffer *buf,
 
 /**
  * iio_buffer_read_first_n_outer() - chrdev read for buffer access
+ * @filp:	File structure pointer for the char device
+ * @buf:	Destination buffer for iio buffer read
+ * @n:		First n bytes to read
+ * @f_ps:	Long offset provided by the user as a seek position
  *
  * This function relies on all buffer implementations having an
  * iio_buffer as their first element.
+ *
+ * Return: negative values corresponding to error codes or ret != 0
+ *	   for ending the reading activity
  **/
 ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
 				      size_t n, loff_t *f_ps)
@@ -143,6 +150,12 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
 
 /**
  * iio_buffer_poll() - poll the buffer to find out if it has data
+ * @filp:	File structure pointer for device access
+ * @wait:	Poll table structure pointer for which the driver adds
+ *		a wait queue
+ *
+ * Return: (POLLIN | POLLRDNORM) if data is available for reading
+ *	   or 0 for other cases
  */
 unsigned int iio_buffer_poll(struct file *filp,
 			     struct poll_table_struct *wait)
@@ -151,7 +164,7 @@ unsigned int iio_buffer_poll(struct file *filp,
 	struct iio_buffer *rb = indio_dev->buffer;
 
 	if (!indio_dev->info)
-		return -ENODEV;
+		return 0;
 
 	poll_wait(filp, &rb->pollq, wait);
 	if (iio_buffer_ready(indio_dev, rb, rb->watermark, 0))
@@ -1136,7 +1149,7 @@ int iio_scan_mask_query(struct iio_dev *indio_dev,
 EXPORT_SYMBOL_GPL(iio_scan_mask_query);
 
 /**
- * struct iio_demux_table() - table describing demux memcpy ops
+ * struct iio_demux_table - table describing demux memcpy ops
  * @from:	index to copy from
  * @to:		index to copy to
  * @length:	how many bytes to copy

drivers/iio/industrialio-core.c

@@ -406,10 +406,16 @@ EXPORT_SYMBOL_GPL(iio_enum_write);
 
 /**
  * iio_format_value() - Formats a IIO value into its string representation
- * @buf: The buffer to which the formated value gets written
- * @type: One of the IIO_VAL_... constants. This decides how the val and val2
- *        parameters are formatted.
- * @vals: pointer to the values, exact meaning depends on the type parameter.
+ * @buf:	The buffer to which the formatted value gets written
+ * @type:	One of the IIO_VAL_... constants. This decides how the val
+ *		and val2 parameters are formatted.
+ * @size:	Number of IIO value entries contained in vals
+ * @vals:	Pointer to the values, exact meaning depends on the
+ *		type parameter.
+ *
+ * Return: 0 by default, a negative number on failure or the
+ *	   total number of characters written for a type that belongs
+ *	   to the IIO_VAL_... constant.
  */
 ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals)
 {
@@ -1096,6 +1102,11 @@ EXPORT_SYMBOL_GPL(devm_iio_device_free);
 
 /**
  * iio_chrdev_open() - chrdev file open for buffer access and ioctls
+ * @inode:	Inode structure for identifying the device in the file system
+ * @filp:	File structure for iio device used to keep and later access
+ *		private data
+ *
+ * Return: 0 on success or -EBUSY if the device is already opened
  **/
 static int iio_chrdev_open(struct inode *inode, struct file *filp)
 {
@@ -1114,7 +1125,11 @@ static int iio_chrdev_open(struct inode *inode, struct file *filp)
 
 /**
  * iio_chrdev_release() - chrdev file close buffer access and ioctls
- **/
+ * @inode:	Inode structure pointer for the char device
+ * @filp:	File structure pointer for the char device
+ *
+ * Return: 0 for successful release
+ */
 static int iio_chrdev_release(struct inode *inode, struct file *filp)
 {
 	struct iio_dev *indio_dev = container_of(inode->i_cdev,

drivers/iio/industrialio-event.c

@@ -32,6 +32,7 @@
  * @dev_attr_list:	list of event interface sysfs attribute
  * @flags:		file operations related flags including busy flag.
  * @group:		event interface sysfs attribute group
+ * @read_lock:		lock to protect kfifo read operations
  */
 struct iio_event_interface {
 	wait_queue_head_t	wait;
@@ -75,6 +76,11 @@ EXPORT_SYMBOL(iio_push_event);
 
 /**
  * iio_event_poll() - poll the event queue to find out if it has data
+ * @filep:	File structure pointer to identify the device
+ * @wait:	Poll table pointer to add the wait queue on
+ *
+ * Return: (POLLIN | POLLRDNORM) if data is available for reading
+ *	   or a negative error code on failure
  */
 static unsigned int iio_event_poll(struct file *filep,
 			     struct poll_table_struct *wait)
@@ -84,7 +90,7 @@ static unsigned int iio_event_poll(struct file *filep,
 	unsigned int events = 0;
 
 	if (!indio_dev->info)
-		return -ENODEV;
+		return events;
 
 	poll_wait(filep, &ev_int->wait, wait);
 

drivers/iio/industrialio-trigger.c

@@ -40,7 +40,14 @@ static DEFINE_MUTEX(iio_trigger_list_lock);
 
 /**
  * iio_trigger_read_name() - retrieve useful identifying name
- **/
+ * @dev:	device associated with the iio_trigger
+ * @attr:	pointer to the device_attribute structure that is
+ *		being processed
+ * @buf:	buffer to print the name into
+ *
+ * Return: a negative number on failure or the number of written
+ *	   characters on success.
+ */
 static ssize_t iio_trigger_read_name(struct device *dev,
 				     struct device_attribute *attr,
 				     char *buf)
@@ -288,10 +295,17 @@ EXPORT_SYMBOL_GPL(iio_dealloc_pollfunc);
 
 /**
  * iio_trigger_read_current() - trigger consumer sysfs query current trigger
+ * @dev:	device associated with an industrial I/O device
+ * @attr:	pointer to the device_attribute structure that
+ *		is being processed
+ * @buf:	buffer where the current trigger name will be printed into
  *
  * For trigger consumers the current_trigger interface allows the trigger
  * used by the device to be queried.
- **/
+ *
+ * Return: a negative number on failure, the number of characters written
+ *	   on success or 0 if no trigger is available
+ */
 static ssize_t iio_trigger_read_current(struct device *dev,
 					struct device_attribute *attr,
 					char *buf)
@@ -305,11 +319,18 @@ static ssize_t iio_trigger_read_current(struct device *dev,
 
 /**
  * iio_trigger_write_current() - trigger consumer sysfs set current trigger
+ * @dev:	device associated with an industrial I/O device
+ * @attr:	device attribute that is being processed
+ * @buf:	string buffer that holds the name of the trigger
+ * @len:	length of the trigger name held by buf
  *
  * For trigger consumers the current_trigger interface allows the trigger
  * used for this device to be specified at run time based on the trigger's
  * name.
- **/
+ *
+ * Return: negative error code on failure or length of the buffer
+ *	   on success
+ */
 static ssize_t iio_trigger_write_current(struct device *dev,
 					 struct device_attribute *attr,
 					 const char *buf,

drivers/iio/light/Kconfig

@@ -210,6 +210,27 @@ config LTR501
 	 This driver can also be built as a module.  If so, the module
          will be called ltr501.
 
+config OPT3001
+	tristate "Texas Instruments OPT3001 Light Sensor"
+	depends on I2C
+	help
+	  If you say Y or M here, you get support for Texas Instruments
+	  OPT3001 Ambient Light Sensor.
+
+	  If built as a dynamically linked module, it will be called
+	  opt3001.
+
+config PA12203001
+        tristate "TXC PA12203001 light and proximity sensor"
+        depends on I2C
+        select REGMAP_I2C
+        help
+         If you say yes here you get support for the TXC PA12203001
+         ambient light and proximity sensor.
+
+         This driver can also be built as a module.  If so, the module
+         will be called pa12203001.
+
 config STK3310
 	tristate "STK3310 ALS and proximity sensor"
 	depends on I2C

drivers/iio/light/Makefile

@@ -19,6 +19,8 @@ obj-$(CONFIG_ISL29125)		+= isl29125.o
 obj-$(CONFIG_JSA1212)		+= jsa1212.o
 obj-$(CONFIG_SENSORS_LM3533)	+= lm3533-als.o
 obj-$(CONFIG_LTR501)		+= ltr501.o
+obj-$(CONFIG_OPT3001)		+= opt3001.o
+obj-$(CONFIG_PA12203001)	+= pa12203001.o
 obj-$(CONFIG_RPR0521)		+= rpr0521.o
 obj-$(CONFIG_SENSORS_TSL2563)	+= tsl2563.o
 obj-$(CONFIG_STK3310)          += stk3310.o

drivers/iio/light/acpi-als.c

@@ -65,20 +65,20 @@ static const struct iio_chan_spec acpi_als_channels[] = {
  * to acpi_als_channels[], the evt_buffer below will grow
  * automatically.
  */
-#define EVT_NR_SOURCES		ARRAY_SIZE(acpi_als_channels)
-#define EVT_BUFFER_SIZE		\
-	(sizeof(s64) + (EVT_NR_SOURCES * sizeof(s32)))
+#define ACPI_ALS_EVT_NR_SOURCES		ARRAY_SIZE(acpi_als_channels)
+#define ACPI_ALS_EVT_BUFFER_SIZE		\
+	(sizeof(s64) + (ACPI_ALS_EVT_NR_SOURCES * sizeof(s32)))
 
 struct acpi_als {
 	struct acpi_device	*device;
 	struct mutex		lock;
 
-	s32			evt_buffer[EVT_BUFFER_SIZE];
+	s32			evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE];
 };
 
 /*
  * All types of properties the ACPI0008 block can report. The ALI, ALC, ALT
- * and ALP can all be handled by als_read_value() below, while the ALR is
+ * and ALP can all be handled by acpi_als_read_value() below, while the ALR is
  * special.
  *
  * The _ALR property returns tables that can be used to fine-tune the values
@@ -93,7 +93,7 @@ struct acpi_als {
 #define ACPI_ALS_POLLING	"_ALP"
 #define ACPI_ALS_TABLES		"_ALR"
 
-static int als_read_value(struct acpi_als *als, char *prop, s32 *val)
+static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val)
 {
 	unsigned long long temp_val;
 	acpi_status status;
@@ -122,11 +122,11 @@ static void acpi_als_notify(struct acpi_device *device, u32 event)
 
 	mutex_lock(&als->lock);
 
-	memset(buffer, 0, EVT_BUFFER_SIZE);
+	memset(buffer, 0, ACPI_ALS_EVT_BUFFER_SIZE);
 
 	switch (event) {
 	case ACPI_ALS_NOTIFY_ILLUMINANCE:
-		ret = als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
+		ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
 		if (ret < 0)
 			goto out;
 		*buffer++ = val;
@@ -159,7 +159,7 @@ static int acpi_als_read_raw(struct iio_dev *indio_dev,
 	if (chan->type != IIO_LIGHT)
 		return -EINVAL;
 
-	ret = als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);
+	ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);
 	if (ret < 0)
 		return ret;
 

drivers/iio/light/cm32181.c

@@ -353,6 +353,7 @@ static const struct of_device_id cm32181_of_match[] = {
 	{ .compatible = "capella,cm32181" },
 	{ }
 };
+MODULE_DEVICE_TABLE(of, cm32181_of_match);
 
 static struct i2c_driver cm32181_driver = {
 	.driver = {

drivers/iio/light/cm3232.c

@@ -417,6 +417,7 @@ static const struct of_device_id cm3232_of_match[] = {
 	{.compatible = "capella,cm3232"},
 	{}
 };
+MODULE_DEVICE_TABLE(of, cm3232_of_match);
 
 static struct i2c_driver cm3232_driver = {
 	.driver = {

drivers/iio/light/cm36651.c

@@ -731,6 +731,7 @@ static const struct of_device_id cm36651_of_match[] = {
 	{ .compatible = "capella,cm36651" },
 	{ }
 };
+MODULE_DEVICE_TABLE(of, cm36651_of_match);
 
 static struct i2c_driver cm36651_driver = {
 	.driver = {

drivers/iio/light/gp2ap020a00f.c

@@ -1634,6 +1634,7 @@ static const struct of_device_id gp2ap020a00f_of_match[] = {
 	{ .compatible = "sharp,gp2ap020a00f" },
 	{ }
 };
+MODULE_DEVICE_TABLE(of, gp2ap020a00f_of_match);
 #endif
 
 static struct i2c_driver gp2ap020a00f_driver = {

drivers/iio/light/stk3310.c

@@ -676,6 +676,7 @@ static const struct i2c_device_id stk3310_i2c_id[] = {
 	{"STK3311", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(i2c, stk3310_i2c_id);
 
 static const struct acpi_device_id stk3310_acpi_id[] = {
 	{"STK3310", 0},

drivers/iio/magnetometer/bmc150_magn.c

@@ -85,6 +85,7 @@
 #define BMC150_MAGN_REG_HIGH_THRESH		0x50
 #define BMC150_MAGN_REG_REP_XY			0x51
 #define BMC150_MAGN_REG_REP_Z			0x52
+#define BMC150_MAGN_REG_REP_DATAMASK		GENMASK(7, 0)
 
 #define BMC150_MAGN_REG_TRIM_START		0x5D
 #define BMC150_MAGN_REG_TRIM_END		0x71
@@ -559,7 +560,7 @@ static int bmc150_magn_write_raw(struct iio_dev *indio_dev,
 			}
 			ret = regmap_update_bits(data->regmap,
 						 BMC150_MAGN_REG_REP_XY,
-						 0xFF,
+						 BMC150_MAGN_REG_REP_DATAMASK,
 						 BMC150_MAGN_REPXY_TO_REGVAL
 						 (val));
 			mutex_unlock(&data->mutex);
@@ -575,7 +576,7 @@ static int bmc150_magn_write_raw(struct iio_dev *indio_dev,
 			}
 			ret = regmap_update_bits(data->regmap,
 						 BMC150_MAGN_REG_REP_Z,
-						 0xFF,
+						 BMC150_MAGN_REG_REP_DATAMASK,
 						 BMC150_MAGN_REPZ_TO_REGVAL
 						 (val));
 			mutex_unlock(&data->mutex);
@@ -651,7 +652,9 @@ static const struct iio_info bmc150_magn_info = {
 	.driver_module = THIS_MODULE,
 };
 
-static const unsigned long bmc150_magn_scan_masks[] = {0x07, 0};
+static const unsigned long bmc150_magn_scan_masks[] = {
+					BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
+					0};
 
 static irqreturn_t bmc150_magn_trigger_handler(int irq, void *p)
 {
@@ -662,7 +665,6 @@ static irqreturn_t bmc150_magn_trigger_handler(int irq, void *p)
 
 	mutex_lock(&data->mutex);
 	ret = bmc150_magn_read_xyz(data, data->buffer);
-	mutex_unlock(&data->mutex);
 	if (ret < 0)
 		goto err;
 
@@ -670,6 +672,7 @@ static irqreturn_t bmc150_magn_trigger_handler(int irq, void *p)
 					   pf->timestamp);
 
 err:
+	mutex_unlock(&data->mutex);
 	iio_trigger_notify_done(indio_dev->trig);
 
 	return IRQ_HANDLED;
@@ -781,29 +784,23 @@ static int bmc150_magn_data_rdy_trigger_set_state(struct iio_trigger *trig,
 	if (state == data->dready_trigger_on)
 		goto err_unlock;
 
-	ret = bmc150_magn_set_power_state(data, state);
-	if (ret < 0)
-		goto err_unlock;
-
 	ret = regmap_update_bits(data->regmap, BMC150_MAGN_REG_INT_DRDY,
 				 BMC150_MAGN_MASK_DRDY_EN,
 				 state << BMC150_MAGN_SHIFT_DRDY_EN);
 	if (ret < 0)
-		goto err_poweroff;
+		goto err_unlock;
 
 	data->dready_trigger_on = state;
 
 	if (state) {
 		ret = bmc150_magn_reset_intr(data);
 		if (ret < 0)
-			goto err_poweroff;
+			goto err_unlock;
 	}
 	mutex_unlock(&data->mutex);
 
 	return 0;
 
-err_poweroff:
-	bmc150_magn_set_power_state(data, false);
 err_unlock:
 	mutex_unlock(&data->mutex);
 	return ret;
@@ -1041,6 +1038,9 @@ static int bmc150_magn_runtime_suspend(struct device *dev)
 	return 0;
 }
 
+/*
+ * Should be called with data->mutex held.
+ */
 static int bmc150_magn_runtime_resume(struct device *dev)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));

drivers/iio/magnetometer/mmc35240.c

@@ -316,31 +316,31 @@ static int mmc35240_read_measurement(struct mmc35240_data *data, __le16 buf[3])
 static int mmc35240_raw_to_mgauss(struct mmc35240_data *data, int index,
 				  __le16 buf[], int *val)
 {
-	int raw_x, raw_y, raw_z;
-	int sens_x, sens_y, sens_z;
+	int raw[3];
+	int sens[3];
 	int nfo;
 
-	raw_x = le16_to_cpu(buf[AXIS_X]);
-	raw_y = le16_to_cpu(buf[AXIS_Y]);
-	raw_z = le16_to_cpu(buf[AXIS_Z]);
+	raw[AXIS_X] = le16_to_cpu(buf[AXIS_X]);
+	raw[AXIS_Y] = le16_to_cpu(buf[AXIS_Y]);
+	raw[AXIS_Z] = le16_to_cpu(buf[AXIS_Z]);
 
-	sens_x = mmc35240_props_table[data->res].sens[AXIS_X];
-	sens_y = mmc35240_props_table[data->res].sens[AXIS_Y];
-	sens_z = mmc35240_props_table[data->res].sens[AXIS_Z];
+	sens[AXIS_X] = mmc35240_props_table[data->res].sens[AXIS_X];
+	sens[AXIS_Y] = mmc35240_props_table[data->res].sens[AXIS_Y];
+	sens[AXIS_Z] = mmc35240_props_table[data->res].sens[AXIS_Z];
 
 	nfo = mmc35240_props_table[data->res].nfo;
 
 	switch (index) {
 	case AXIS_X:
-		*val = (raw_x - nfo) * 1000 / sens_x;
+		*val = (raw[AXIS_X] - nfo) * 1000 / sens[AXIS_X];
 		break;
 	case AXIS_Y:
-		*val = (raw_y - nfo) * 1000 / sens_y -
-			(raw_z - nfo)  * 1000 / sens_z;
+		*val = (raw[AXIS_Y] - nfo) * 1000 / sens[AXIS_Y] -
+			(raw[AXIS_Z] - nfo)  * 1000 / sens[AXIS_Z];
 		break;
 	case AXIS_Z:
-		*val = (raw_y - nfo) * 1000 / sens_y +
-			(raw_z - nfo) * 1000 / sens_z;
+		*val = (raw[AXIS_Y] - nfo) * 1000 / sens[AXIS_Y] +
+			(raw[AXIS_Z] - nfo) * 1000 / sens[AXIS_Z];
 		break;
 	default:
 		return -EINVAL;
@@ -559,6 +559,12 @@ static const struct dev_pm_ops mmc35240_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(mmc35240_suspend, mmc35240_resume)
 };
 
+static const struct of_device_id mmc35240_of_match[] = {
+	{ .compatible = "memsic,mmc35240", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mmc35240_of_match);
+
 static const struct acpi_device_id mmc35240_acpi_match[] = {
 	{"MMC35240", 0},
 	{ },
@@ -574,6 +580,7 @@ MODULE_DEVICE_TABLE(i2c, mmc35240_id);
 static struct i2c_driver mmc35240_driver = {
 	.driver = {
 		.name = MMC35240_DRV_NAME,
+		.of_match_table = mmc35240_of_match,
 		.pm = &mmc35240_pm_ops,
 		.acpi_match_table = ACPI_PTR(mmc35240_acpi_match),
 	},

drivers/iio/magnetometer/st_magn.h

@@ -18,6 +18,7 @@
 #define LSM303DLHC_MAGN_DEV_NAME	"lsm303dlhc_magn"
 #define LSM303DLM_MAGN_DEV_NAME		"lsm303dlm_magn"
 #define LIS3MDL_MAGN_DEV_NAME		"lis3mdl"
+#define LSM303AGR_MAGN_DEV_NAME		"lsm303agr_magn"
 
 int st_magn_common_probe(struct iio_dev *indio_dev);
 void st_magn_common_remove(struct iio_dev *indio_dev);
@@ -25,6 +26,8 @@ void st_magn_common_remove(struct iio_dev *indio_dev);
 #ifdef CONFIG_IIO_BUFFER
 int st_magn_allocate_ring(struct iio_dev *indio_dev);
 void st_magn_deallocate_ring(struct iio_dev *indio_dev);
+int st_magn_trig_set_state(struct iio_trigger *trig, bool state);
+#define ST_MAGN_TRIGGER_SET_STATE (&st_magn_trig_set_state)
 #else /* CONFIG_IIO_BUFFER */
 static inline int st_magn_probe_trigger(struct iio_dev *indio_dev, int irq)
 {

drivers/iio/magnetometer/st_magn_buffer.c

@@ -23,6 +23,13 @@
 #include <linux/iio/common/st_sensors.h>
 #include "st_magn.h"
 
+int st_magn_trig_set_state(struct iio_trigger *trig, bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+
+	return st_sensors_set_dataready_irq(indio_dev, state);
+}
+
 static int st_magn_buffer_preenable(struct iio_dev *indio_dev)
 {
 	return st_sensors_set_enable(indio_dev, true);

drivers/iio/magnetometer/st_magn_core.c

@@ -43,6 +43,7 @@
 #define ST_MAGN_FS_AVL_8000MG			8000
 #define ST_MAGN_FS_AVL_8100MG			8100
 #define ST_MAGN_FS_AVL_12000MG			12000
+#define ST_MAGN_FS_AVL_15000MG			15000
 #define ST_MAGN_FS_AVL_16000MG			16000
 
 /* CUSTOM VALUES FOR SENSOR 0 */
@@ -157,6 +158,29 @@
 #define ST_MAGN_2_OUT_Y_L_ADDR			0x2a
 #define ST_MAGN_2_OUT_Z_L_ADDR			0x2c
 
+/* CUSTOM VALUES FOR SENSOR 3 */
+#define ST_MAGN_3_WAI_ADDR			0x4f
+#define ST_MAGN_3_WAI_EXP			0x40
+#define ST_MAGN_3_ODR_ADDR			0x60
+#define ST_MAGN_3_ODR_MASK			0x0c
+#define ST_MAGN_3_ODR_AVL_10HZ_VAL		0x00
+#define ST_MAGN_3_ODR_AVL_20HZ_VAL		0x01
+#define ST_MAGN_3_ODR_AVL_50HZ_VAL		0x02
+#define ST_MAGN_3_ODR_AVL_100HZ_VAL		0x03
+#define ST_MAGN_3_PW_ADDR			0x60
+#define ST_MAGN_3_PW_MASK			0x03
+#define ST_MAGN_3_PW_ON				0x00
+#define ST_MAGN_3_PW_OFF			0x03
+#define ST_MAGN_3_BDU_ADDR			0x62
+#define ST_MAGN_3_BDU_MASK			0x10
+#define ST_MAGN_3_DRDY_IRQ_ADDR			0x62
+#define ST_MAGN_3_DRDY_INT_MASK			0x01
+#define ST_MAGN_3_FS_AVL_15000_GAIN		1500
+#define ST_MAGN_3_MULTIREAD_BIT			false
+#define ST_MAGN_3_OUT_X_L_ADDR			0x68
+#define ST_MAGN_3_OUT_Y_L_ADDR			0x6a
+#define ST_MAGN_3_OUT_Z_L_ADDR			0x6c
+
 static const struct iio_chan_spec st_magn_16bit_channels[] = {
 	ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
 			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
@@ -189,9 +213,26 @@ static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(3)
 };
 
+static const struct iio_chan_spec st_magn_3_16bit_channels[] = {
+	ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
+			ST_MAGN_3_OUT_X_L_ADDR),
+	ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
+			ST_MAGN_3_OUT_Y_L_ADDR),
+	ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
+			ST_MAGN_3_OUT_Z_L_ADDR),
+	IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
 static const struct st_sensor_settings st_magn_sensors_settings[] = {
 	{
 		.wai = 0, /* This sensor has no valid WhoAmI report 0 */
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LSM303DLH_MAGN_DEV_NAME,
 		},
@@ -268,6 +309,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 	},
 	{
 		.wai = ST_MAGN_1_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LSM303DLHC_MAGN_DEV_NAME,
 			[1] = LSM303DLM_MAGN_DEV_NAME,
@@ -346,6 +388,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 	},
 	{
 		.wai = ST_MAGN_2_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LIS3MDL_MAGN_DEV_NAME,
 		},
@@ -399,6 +442,48 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 		.multi_read_bit = ST_MAGN_2_MULTIREAD_BIT,
 		.bootime = 2,
 	},
+	{
+		.wai = ST_MAGN_3_WAI_EXP,
+		.wai_addr = ST_MAGN_3_WAI_ADDR,
+		.sensors_supported = {
+			[0] = LSM303AGR_MAGN_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_magn_3_16bit_channels,
+		.odr = {
+			.addr = ST_MAGN_3_ODR_ADDR,
+			.mask = ST_MAGN_3_ODR_MASK,
+			.odr_avl = {
+				{ 10, ST_MAGN_3_ODR_AVL_10HZ_VAL, },
+				{ 20, ST_MAGN_3_ODR_AVL_20HZ_VAL, },
+				{ 50, ST_MAGN_3_ODR_AVL_50HZ_VAL, },
+				{ 100, ST_MAGN_3_ODR_AVL_100HZ_VAL, },
+			},
+		},
+		.pw = {
+			.addr = ST_MAGN_3_PW_ADDR,
+			.mask = ST_MAGN_3_PW_MASK,
+			.value_on = ST_MAGN_3_PW_ON,
+			.value_off = ST_MAGN_3_PW_OFF,
+		},
+		.fs = {
+			.fs_avl = {
+				[0] = {
+					.num = ST_MAGN_FS_AVL_15000MG,
+					.gain = ST_MAGN_3_FS_AVL_15000_GAIN,
+				},
+			},
+		},
+		.bdu = {
+			.addr = ST_MAGN_3_BDU_ADDR,
+			.mask = ST_MAGN_3_BDU_MASK,
+		},
+		.drdy_irq = {
+			.addr = ST_MAGN_3_DRDY_IRQ_ADDR,
+			.mask_int1 = ST_MAGN_3_DRDY_INT_MASK,
+		},
+		.multi_read_bit = ST_MAGN_3_MULTIREAD_BIT,
+		.bootime = 2,
+	},
 };
 
 static int st_magn_read_raw(struct iio_dev *indio_dev,
@@ -477,6 +562,16 @@ static const struct iio_info magn_info = {
 	.write_raw = &st_magn_write_raw,
 };
 
+#ifdef CONFIG_IIO_TRIGGER
+static const struct iio_trigger_ops st_magn_trigger_ops = {
+	.owner = THIS_MODULE,
+	.set_trigger_state = ST_MAGN_TRIGGER_SET_STATE,
+};
+#define ST_MAGN_TRIGGER_OPS (&st_magn_trigger_ops)
+#else
+#define ST_MAGN_TRIGGER_OPS NULL
+#endif
+
 int st_magn_common_probe(struct iio_dev *indio_dev)
 {
 	struct st_sensor_data *mdata = iio_priv(indio_dev);
@@ -513,7 +608,8 @@ int st_magn_common_probe(struct iio_dev *indio_dev)
 		return err;
 
 	if (irq > 0) {
-		err = st_sensors_allocate_trigger(indio_dev, NULL);
+		err = st_sensors_allocate_trigger(indio_dev,
+						ST_MAGN_TRIGGER_OPS);
 		if (err < 0)
 			goto st_magn_probe_trigger_error;
 	}

drivers/iio/magnetometer/st_magn_i2c.c

@@ -36,6 +36,10 @@ static const struct of_device_id st_magn_of_match[] = {
 		.compatible = "st,lis3mdl-magn",
 		.data = LIS3MDL_MAGN_DEV_NAME,
 	},
+	{
+		.compatible = "st,lsm303agr-magn",
+		.data = LSM303AGR_MAGN_DEV_NAME,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_magn_of_match);
@@ -79,6 +83,7 @@ static const struct i2c_device_id st_magn_id_table[] = {
 	{ LSM303DLHC_MAGN_DEV_NAME },
 	{ LSM303DLM_MAGN_DEV_NAME },
 	{ LIS3MDL_MAGN_DEV_NAME },
+	{ LSM303AGR_MAGN_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);

drivers/iio/magnetometer/st_magn_spi.c

@@ -51,6 +51,7 @@ static const struct spi_device_id st_magn_id_table[] = {
 	{ LSM303DLHC_MAGN_DEV_NAME },
 	{ LSM303DLM_MAGN_DEV_NAME },
 	{ LIS3MDL_MAGN_DEV_NAME },
+	{ LSM303AGR_MAGN_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_magn_id_table);

drivers/iio/pressure/st_pressure_core.c

@@ -178,6 +178,7 @@ static const struct iio_chan_spec st_press_lps001wp_channels[] = {
 static const struct st_sensor_settings st_press_sensors_settings[] = {
 	{
 		.wai = ST_PRESS_LPS331AP_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LPS331AP_PRESS_DEV_NAME,
 		},
@@ -225,6 +226,7 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
 	},
 	{
 		.wai = ST_PRESS_LPS001WP_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LPS001WP_PRESS_DEV_NAME,
 		},
@@ -260,6 +262,7 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
 	},
 	{
 		.wai = ST_PRESS_LPS25H_WAI_EXP,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LPS25H_PRESS_DEV_NAME,
 		},

drivers/iio/temperature/mlx90614.c

@@ -65,6 +65,13 @@
 
 #define MLX90614_AUTOSLEEP_DELAY 5000 /* default autosleep delay */
 
+/* Magic constants */
+#define MLX90614_CONST_OFFSET_DEC -13657 /* decimal part of the Kelvin offset */
+#define MLX90614_CONST_OFFSET_REM 500000 /* remainder of offset (273.15*50) */
+#define MLX90614_CONST_SCALE 20 /* Scale in milliKelvin (0.02 * 1000) */
+#define MLX90614_CONST_RAW_EMISSIVITY_MAX 65535 /* max value for emissivity */
+#define MLX90614_CONST_EMISSIVITY_RESOLUTION 15259 /* 1/65535 ~ 0.000015259 */
+
 struct mlx90614_data {
 	struct i2c_client *client;
 	struct mutex lock; /* for EEPROM access only */
@@ -204,11 +211,11 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
 		*val = ret;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_OFFSET:
-		*val = -13657;
-		*val2 = 500000;
+		*val = MLX90614_CONST_OFFSET_DEC;
+		*val2 = MLX90614_CONST_OFFSET_REM;
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_SCALE:
-		*val = 20;
+		*val = MLX90614_CONST_SCALE;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_CALIBEMISSIVITY: /* 1/65535 / LSB */
 		mlx90614_power_get(data, false);
@@ -221,12 +228,12 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 
-		if (ret == 65535) {
+		if (ret == MLX90614_CONST_RAW_EMISSIVITY_MAX) {
 			*val = 1;
 			*val2 = 0;
 		} else {
 			*val = 0;
-			*val2 = ret * 15259; /* 1/65535 ~ 0.000015259 */
+			*val2 = ret * MLX90614_CONST_EMISSIVITY_RESOLUTION;
 		}
 		return IIO_VAL_INT_PLUS_NANO;
 	default:
@@ -245,7 +252,8 @@ static int mlx90614_write_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_CALIBEMISSIVITY: /* 1/65535 / LSB */
 		if (val < 0 || val2 < 0 || val > 1 || (val == 1 && val2 != 0))
 			return -EINVAL;
-		val = val * 65535 + val2 / 15259; /* 1/65535 ~ 0.000015259 */
+		val = val * MLX90614_CONST_RAW_EMISSIVITY_MAX +
+			val2 / MLX90614_CONST_EMISSIVITY_RESOLUTION;
 
 		mlx90614_power_get(data, false);
 		mutex_lock(&data->lock);

include/linux/iio/common/st_sensors.h

@@ -166,6 +166,7 @@ struct st_sensor_transfer_function {
 /**
  * struct st_sensor_settings - ST specific sensor settings
  * @wai: Contents of WhoAmI register.
+ * @wai_addr: The address of WhoAmI register.
  * @sensors_supported: List of supported sensors by struct itself.
  * @ch: IIO channels for the sensor.
  * @odr: Output data rate register and ODR list available.
@@ -179,6 +180,7 @@ struct st_sensor_transfer_function {
  */
 struct st_sensor_settings {
 	u8 wai;
+	u8 wai_addr;
 	char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME];
 	struct iio_chan_spec *ch;
 	int num_ch;

include/linux/iio/consumer.h

@@ -100,7 +100,7 @@ void iio_channel_stop_all_cb(struct iio_cb_buffer *cb_buff);
 
 /**
  * iio_channel_cb_get_channels() - get access to the underlying channels.
- * @cb_buff:		The callback buffer from whom we want the channel
+ * @cb_buffer:		The callback buffer from whom we want the channel
  *			information.
  *
  * This function allows one to obtain information about the channels.

include/linux/iio/iio.h

@@ -644,6 +644,15 @@ int iio_str_to_fixpoint(const char *str, int fract_mult, int *integer,
  */
 #define IIO_DEGREE_TO_RAD(deg) (((deg) * 314159ULL + 9000000ULL) / 18000000ULL)
 
+/**
+ * IIO_RAD_TO_DEGREE() - Convert rad to degree
+ * @rad: A value in rad
+ *
+ * Returns the given value converted from rad to degree
+ */
+#define IIO_RAD_TO_DEGREE(rad) \
+	(((rad) * 18000000ULL + 314159ULL / 2) / 314159ULL)
+
 /**
  * IIO_G_TO_M_S_2() - Convert g to meter / second**2
  * @g: A value in g
@@ -652,4 +661,12 @@ int iio_str_to_fixpoint(const char *str, int fract_mult, int *integer,
  */
 #define IIO_G_TO_M_S_2(g) ((g) * 980665ULL / 100000ULL)
 
+/**
+ * IIO_M_S_2_TO_G() - Convert meter / second**2 to g
+ * @ms2: A value in meter / second**2
+ *
+ * Returns the given value converted from meter / second**2 to g
+ */
+#define IIO_M_S_2_TO_G(ms2) (((ms2) * 100000ULL + 980665ULL / 2) / 980665ULL)
+
 #endif /* _INDUSTRIAL_IO_H_ */

include/linux/iio/sysfs.h

@@ -18,7 +18,8 @@ struct iio_chan_spec;
  * struct iio_dev_attr - iio specific device attribute
  * @dev_attr:	underlying device attribute
  * @address:	associated register address
- * @l:		list head for maintaining list of dynamically created attrs.
+ * @l:		list head for maintaining list of dynamically created attrs
+ * @c:		specification for the underlying channel
  */
 struct iio_dev_attr {
 	struct device_attribute dev_attr;

include/linux/iio/trigger.h

@@ -18,6 +18,9 @@ struct iio_subirq {
 	bool enabled;
 };
 
+struct iio_dev;
+struct iio_trigger;
+
 /**
  * struct iio_trigger_ops - operations structure for an iio_trigger.
  * @owner:		used to monitor usage count of the trigger.

tools/iio/iio_utils.h

@@ -18,6 +18,8 @@
 #define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
 #define FORMAT_TYPE_FILE "%s_type"
 
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+
 extern const char *iio_dir;
 
 /**
@@ -58,7 +60,7 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
 int iioutils_get_param_float(float *output, const char *param_name,
 			     const char *device_dir, const char *name,
 			     const char *generic_name);
-void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt);
+void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt);
 int build_channel_array(const char *device_dir,
 			struct iio_channel_info **ci_array, int *counter);
 int find_type_by_name(const char *name, const char *type);