Merge tag 'iio-for-3.15a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of new drivers and cleanups for IIO in the 3.15 cycle.

New drivers:
* si7005 relative humidity and temperature sensor
* Lite-on ltr501 ambient light and proximity sensor

Cleanups
* Clean up some dead comments in max1363
* Drop some obsolete variables in adjd_s311 and tcs3472 left over from
  the introduction of iio_push_to_buffers_with_timestamp.
* Drop some unneeded linux/init.h includes
* Squish a sparse warning in mpl3115 by correctly specifying a be32 variable.
* A number of cleanups and fixes for sca3000
* Drop an unneed checks in mxs-lradc, ad7303 and adis16400.
* Drop a platform_set_drvdata in viperboard after the only use of it was
  removed during a devm conversion.
* Add a missing device name for ak8975 to comply with the ABI.
* Put mpu6050 into the IMU menu as it slipped out into the main menu.
* Fix a typo and some comment formatting in mpu6050.
* Document at91 ADC clock properties.

26 files changed, 781 insertions, 158 deletions

diff --git a/Documentation/devicetree/bindings/arm/atmel-adc.txt b/Documentation/devicetree/bindings/arm/atmel-adc.txt
index d1061469f63..9a1175b46f4 100644
--- a/Documentation/devicetree/bindings/arm/atmel-adc.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-adc.txt
@@ -5,6 +5,9 @@ Required properties:
     <chip> can be "at91sam9260", "at91sam9g45" or "at91sam9x5"
   - reg: Should contain ADC registers location and length
   - interrupts: Should contain the IRQ line for the ADC
+  - clock-names: tuple listing input clock names.
+	Required elements: "adc_clk", "adc_op_clk".
+  - clocks: phandles to input clocks.
   - atmel,adc-channels-used: Bitmask of the channels muxed and enable for this
     device
   - atmel,adc-startup-time: Startup Time of the ADC in microseconds as
@@ -44,6 +47,8 @@ adc0: adc@fffb0000 {
 	compatible = "atmel,at91sam9260-adc";
 	reg = <0xfffb0000 0x100>;
 	interrupts = <20 4>;
+	clocks = <&adc_clk>, <&adc_op_clk>;
+	clock-names = "adc_clk", "adc_op_clk";
 	atmel,adc-channel-base = <0x30>;
 	atmel,adc-channels-used = <0xff>;
 	atmel,adc-drdy-mask = <0x10000>;
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index 360259266d4..ce84b012f7d 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -8,17 +8,11 @@
   * based on linux/drivers/acron/char/pcf8583.c
   * Copyright (C) 2000 Russell King
   *
+  * Driver for max1363 and similar chips.
+  *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
-  *
-  * max1363.c
-  *
-  * Partial support for max1363 and similar chips.
-  *
-  * Not currently implemented.
-  *
-  * - Control of internal reference.
   */
 
 #include <linux/interrupt.h>
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 31e786e3999..a4db3026bec 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -13,7 +13,6 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/err.h>
 #include <linux/module.h>
diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
index 53a24ebb92c..15282f148b3 100644
--- a/drivers/iio/adc/twl6030-gpadc.c
+++ b/drivers/iio/adc/twl6030-gpadc.c
@@ -28,7 +28,6 @@
  * 02110-1301 USA
  *
  */
-#include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
index d0add8f9416..9acf6b6d705 100644
--- a/drivers/iio/adc/viperboard_adc.c
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -139,8 +139,6 @@ static int vprbrd_adc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	platform_set_drvdata(pdev, indio_dev);
-
 	return 0;
 }
 
diff --git a/drivers/iio/dac/ad7303.c b/drivers/iio/dac/ad7303.c
index d0505fd22ef..fa281003296 100644
--- a/drivers/iio/dac/ad7303.c
+++ b/drivers/iio/dac/ad7303.c
@@ -92,7 +92,7 @@ static ssize_t ad7303_write_dac_powerdown(struct iio_dev *indio_dev,
 	ad7303_write(st, chan->channel, st->dac_cache[chan->channel]);
 
 	mutex_unlock(&indio_dev->mlock);
-	return ret ? ret : len;
+	return len;
 }
 
 static int ad7303_get_vref(struct ad7303_state *st,
diff --git a/drivers/iio/dac/max517.c b/drivers/iio/dac/max517.c
index de76e6a34c1..9a82a7255eb 100644
--- a/drivers/iio/dac/max517.c
+++ b/drivers/iio/dac/max517.c
@@ -19,7 +19,6 @@
  */
 
 #include <linux/module.h>
-#include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <linux/i2c.h>
diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c
index 7d9f5c31d2f..43d14588448 100644
--- a/drivers/iio/dac/mcp4725.c
+++ b/drivers/iio/dac/mcp4725.c
@@ -15,7 +15,6 @@
  */
 
 #include <linux/module.h>
-#include <linux/init.h>
 #include <linux/i2c.h>
 #include <linux/err.h>
 #include <linux/delay.h>
diff --git a/drivers/iio/humidity/Kconfig b/drivers/iio/humidity/Kconfig
index 463c4d9da79..e116bd8dd0e 100644
--- a/drivers/iio/humidity/Kconfig
+++ b/drivers/iio/humidity/Kconfig
@@ -12,4 +12,14 @@ config DHT11
 	  Other sensors should work as well as long as they speak the
 	  same protocol.
 
+config SI7005
+	tristate "SI7005 relative humidity and temperature sensor"
+	depends on I2C
+	help
+	  Say yes here to build support for the Silabs Si7005 relative
+	  humidity and temperature sensor.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called si7005.
+
 endmenu
diff --git a/drivers/iio/humidity/Makefile b/drivers/iio/humidity/Makefile
index d5d36c0c95f..e3f3d942e64 100644
--- a/drivers/iio/humidity/Makefile
+++ b/drivers/iio/humidity/Makefile
@@ -3,3 +3,4 @@
 #
 
 obj-$(CONFIG_DHT11) += dht11.o
+obj-$(CONFIG_SI7005) += si7005.o
diff --git a/drivers/iio/humidity/si7005.c b/drivers/iio/humidity/si7005.c
new file mode 100644
index 00000000000..bdd586e6d95
--- /dev/null
+++ b/drivers/iio/humidity/si7005.c
@@ -0,0 +1,189 @@
+/*
+ * si7005.c - Support for Silabs Si7005 humidity and temperature sensor
+ *
+ * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License.  See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * (7-bit I2C slave address 0x40)
+ *
+ * TODO: heater, fast mode, processed mode (temp. / linearity compensation)
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define SI7005_STATUS 0x00
+#define SI7005_DATA 0x01 /* 16-bit, MSB */
+#define SI7005_CONFIG 0x03
+#define SI7005_ID 0x11
+
+#define SI7005_STATUS_NRDY BIT(0)
+#define SI7005_CONFIG_TEMP BIT(4)
+#define SI7005_CONFIG_START BIT(0)
+
+#define SI7005_ID_7005 0x50
+#define SI7005_ID_7015 0xf0
+
+struct si7005_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	u8 config;
+};
+
+static int si7005_read_measurement(struct si7005_data *data, bool temp)
+{
+	int tries = 50;
+	int ret;
+
+	mutex_lock(&data->lock);
+
+	ret = i2c_smbus_write_byte_data(data->client, SI7005_CONFIG,
+		data->config | SI7005_CONFIG_START |
+		(temp ? SI7005_CONFIG_TEMP : 0));
+	if (ret < 0)
+		goto done;
+
+	while (tries-- > 0) {
+		msleep(20);
+		ret = i2c_smbus_read_byte_data(data->client, SI7005_STATUS);
+		if (ret < 0)
+			goto done;
+		if (!(ret & SI7005_STATUS_NRDY))
+			break;
+	}
+	if (tries < 0) {
+		ret = -EIO;
+		goto done;
+	}
+
+	ret = i2c_smbus_read_word_swapped(data->client, SI7005_DATA);
+
+done:
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int si7005_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan, int *val,
+			    int *val2, long mask)
+{
+	struct si7005_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = si7005_read_measurement(data, chan->type == IIO_TEMP);
+		if (ret < 0)
+			return ret;
+		*val = ret;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		if (chan->type == IIO_TEMP) {
+			*val = 7;
+			*val2 = 812500;
+		} else {
+			*val = 3;
+			*val2 = 906250;
+		}
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OFFSET:
+		if (chan->type == IIO_TEMP)
+			*val = -50 * 32 * 4;
+		else
+			*val = -24 * 16 * 16;
+		return IIO_VAL_INT;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_chan_spec si7005_channels[] = {
+	{
+		.type = IIO_HUMIDITYRELATIVE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+			BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),
+	},
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+			BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),
+	}
+};
+
+static const struct iio_info si7005_info = {
+	.read_raw = si7005_read_raw,
+	.driver_module = THIS_MODULE,
+};
+
+static int si7005_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct iio_dev *indio_dev;
+	struct si7005_data *data;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
+		return -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+	mutex_init(&data->lock);
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->name = dev_name(&client->dev);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &si7005_info;
+
+	indio_dev->channels = si7005_channels;
+	indio_dev->num_channels = ARRAY_SIZE(si7005_channels);
+
+	ret = i2c_smbus_read_byte_data(client, SI7005_ID);
+	if (ret < 0)
+		return ret;
+	if (ret != SI7005_ID_7005 && ret != SI7005_ID_7015)
+		return -ENODEV;
+
+	ret = i2c_smbus_read_byte_data(client, SI7005_CONFIG);
+	if (ret < 0)
+		return ret;
+	data->config = ret;
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id si7005_id[] = {
+	{ "si7005", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, si7005_id);
+
+static struct i2c_driver si7005_driver = {
+	.driver = {
+		.name	= "si7005",
+		.owner	= THIS_MODULE,
+	},
+	.probe = si7005_probe,
+	.id_table = si7005_id,
+};
+module_i2c_driver(si7005_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Silabs Si7005 humidity and temperature sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/imu/Kconfig b/drivers/iio/imu/Kconfig
index 663e88a1a3c..2b0e45133e9 100644
--- a/drivers/iio/imu/Kconfig
+++ b/drivers/iio/imu/Kconfig
@@ -25,6 +25,8 @@ config ADIS16480
 	  Say yes here to build support for Analog Devices ADIS16375, ADIS16480,
 	  ADIS16485, ADIS16488 inertial sensors.
 
+source "drivers/iio/imu/inv_mpu6050/Kconfig"
+
 endmenu
 
 config IIO_ADIS_LIB
@@ -38,5 +40,3 @@ config IIO_ADIS_LIB_BUFFER
 	help
 	  A set of buffer helper functions for the Analog Devices ADIS* device
 	  family.
-
-source "drivers/iio/imu/inv_mpu6050/Kconfig"
diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c
index 7c582f7ae34..433583b6f80 100644
--- a/drivers/iio/imu/adis16400_core.c
+++ b/drivers/iio/imu/adis16400_core.c
@@ -281,7 +281,7 @@ static ssize_t adis16400_write_frequency(struct device *dev,
 	st->variant->set_freq(st, val);
 	mutex_unlock(&indio_dev->mlock);
 
-	return ret ? ret : len;
+	return len;
 }
 
 /* Power down the device */
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index df7f1e1157a..cb9f96b446a 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -12,7 +12,6 @@
 */
 
 #include <linux/module.h>
-#include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/err.h>
@@ -117,7 +116,7 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
 		return result;
 
 	if (en) {
-		/* Wait for output stablize */
+		/* Wait for output stabilize */
 		msleep(INV_MPU6050_TEMP_UP_TIME);
 		if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
 			/* switch internal clock to PLL */
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index f38395529a4..0ab382be1e6 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -126,35 +126,35 @@ struct inv_mpu6050_state {
 #define INV_MPU6050_REG_SAMPLE_RATE_DIV     0x19
 #define INV_MPU6050_REG_CONFIG              0x1A
 #define INV_MPU6050_REG_GYRO_CONFIG         0x1B
-#define INV_MPU6050_REG_ACCEL_CONFIG	    0x1C
+#define INV_MPU6050_REG_ACCEL_CONFIG        0x1C
 
 #define INV_MPU6050_REG_FIFO_EN             0x23
-#define INV_MPU6050_BIT_ACCEL_OUT                   0x08
-#define INV_MPU6050_BITS_GYRO_OUT                   0x70
+#define INV_MPU6050_BIT_ACCEL_OUT           0x08
+#define INV_MPU6050_BITS_GYRO_OUT           0x70
 
 #define INV_MPU6050_REG_INT_ENABLE          0x38
-#define INV_MPU6050_BIT_DATA_RDY_EN                 0x01
-#define INV_MPU6050_BIT_DMP_INT_EN                  0x02
+#define INV_MPU6050_BIT_DATA_RDY_EN         0x01
+#define INV_MPU6050_BIT_DMP_INT_EN          0x02
 
 #define INV_MPU6050_REG_RAW_ACCEL           0x3B
 #define INV_MPU6050_REG_TEMPERATURE         0x41
 #define INV_MPU6050_REG_RAW_GYRO            0x43
 
 #define INV_MPU6050_REG_USER_CTRL           0x6A
-#define INV_MPU6050_BIT_FIFO_RST                    0x04
-#define INV_MPU6050_BIT_DMP_RST                     0x08
-#define INV_MPU6050_BIT_I2C_MST_EN                  0x20
-#define INV_MPU6050_BIT_FIFO_EN                     0x40
-#define INV_MPU6050_BIT_DMP_EN                      0x80
+#define INV_MPU6050_BIT_FIFO_RST            0x04
+#define INV_MPU6050_BIT_DMP_RST             0x08
+#define INV_MPU6050_BIT_I2C_MST_EN          0x20
+#define INV_MPU6050_BIT_FIFO_EN             0x40
+#define INV_MPU6050_BIT_DMP_EN              0x80
 
 #define INV_MPU6050_REG_PWR_MGMT_1          0x6B
-#define INV_MPU6050_BIT_H_RESET                     0x80
-#define INV_MPU6050_BIT_SLEEP                       0x40
-#define INV_MPU6050_BIT_CLK_MASK                    0x7
+#define INV_MPU6050_BIT_H_RESET             0x80
+#define INV_MPU6050_BIT_SLEEP               0x40
+#define INV_MPU6050_BIT_CLK_MASK            0x7
 
 #define INV_MPU6050_REG_PWR_MGMT_2          0x6C
-#define INV_MPU6050_BIT_PWR_ACCL_STBY               0x38
-#define INV_MPU6050_BIT_PWR_GYRO_STBY               0x07
+#define INV_MPU6050_BIT_PWR_ACCL_STBY       0x38
+#define INV_MPU6050_BIT_PWR_GYRO_STBY       0x07
 
 #define INV_MPU6050_REG_FIFO_COUNT_H        0x72
 #define INV_MPU6050_REG_FIFO_R_W            0x74
@@ -180,10 +180,10 @@ struct inv_mpu6050_state {
 
 /* init parameters */
 #define INV_MPU6050_INIT_FIFO_RATE           50
-#define INV_MPU6050_TIME_STAMP_TOR                        5
-#define INV_MPU6050_MAX_FIFO_RATE                         1000
-#define INV_MPU6050_MIN_FIFO_RATE                         4
-#define INV_MPU6050_ONE_K_HZ                              1000
+#define INV_MPU6050_TIME_STAMP_TOR           5
+#define INV_MPU6050_MAX_FIFO_RATE            1000
+#define INV_MPU6050_MIN_FIFO_RATE            4
+#define INV_MPU6050_ONE_K_HZ                 1000
 
 /* scan element definition */
 enum inv_mpu6050_scan {
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
index 429517117ef..0cd306a72a6 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
@@ -12,7 +12,6 @@
 */
 
 #include <linux/module.h>
-#include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/err.h>
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index d12b2a0dbfb..3a7a5d9f03a 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -90,6 +90,18 @@ config SENSORS_LM3533
 	  changes. The ALS-control output values can be set per zone for the
 	  three current output channels.
 
+config LTR501
+	tristate "LTR-501ALS-01 light sensor"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	 If you say yes here you get support for the Lite-On LTR-501ALS-01
+	 ambient light and proximity sensor.
+
+	 This driver can also be built as a module.  If so, the module
+         will be called ltr501.
+
 config TCS3472
 	tristate "TAOS TCS3472 color light-to-digital converter"
 	depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 60e35ac07ff..924530597f8 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_CM36651)		+= cm36651.o
 obj-$(CONFIG_GP2AP020A00F)	+= gp2ap020a00f.o
 obj-$(CONFIG_HID_SENSOR_ALS)	+= hid-sensor-als.o
 obj-$(CONFIG_SENSORS_LM3533)	+= lm3533-als.o
+obj-$(CONFIG_LTR501)		+= ltr501.o
 obj-$(CONFIG_SENSORS_TSL2563)	+= tsl2563.o
 obj-$(CONFIG_TCS3472)		+= tcs3472.o
 obj-$(CONFIG_TSL4531)		+= tsl4531.o
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
index f3068477b46..09ad5f1ce53 100644
--- a/drivers/iio/light/adjd_s311.c
+++ b/drivers/iio/light/adjd_s311.c
@@ -14,7 +14,6 @@
  */
 
 #include <linux/module.h>
-#include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
@@ -120,7 +119,6 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct adjd_s311_data *data = iio_priv(indio_dev);
 	s64 time_ns = iio_get_time_ns();
-	int len = 0;
 	int i, j = 0;
 
 	int ret = adjd_s311_req_data(indio_dev);
@@ -135,7 +133,6 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
 			goto done;
 
 		data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
-		len += 2;
 	}
 
 	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns);
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
new file mode 100644
index 00000000000..62b7072af4d
--- /dev/null
+++ b/drivers/iio/light/ltr501.c
@@ -0,0 +1,445 @@
+/*
+ * ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor
+ *
+ * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License.  See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * 7-bit I2C slave address 0x23
+ *
+ * TODO: interrupt, threshold, measurement rate, IR LED characteristics
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define LTR501_DRV_NAME "ltr501"
+
+#define LTR501_ALS_CONTR 0x80 /* ALS operation mode, SW reset */
+#define LTR501_PS_CONTR 0x81 /* PS operation mode */
+#define LTR501_PART_ID 0x86
+#define LTR501_MANUFAC_ID 0x87
+#define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */
+#define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */
+#define LTR501_ALS_PS_STATUS 0x8c
+#define LTR501_PS_DATA 0x8d /* 16-bit, little endian */
+
+#define LTR501_ALS_CONTR_SW_RESET BIT(2)
+#define LTR501_CONTR_PS_GAIN_MASK (BIT(3) | BIT(2))
+#define LTR501_CONTR_PS_GAIN_SHIFT 2
+#define LTR501_CONTR_ALS_GAIN_MASK BIT(3)
+#define LTR501_CONTR_ACTIVE BIT(1)
+
+#define LTR501_STATUS_ALS_RDY BIT(2)
+#define LTR501_STATUS_PS_RDY BIT(0)
+
+#define LTR501_PS_DATA_MASK 0x7ff
+
+struct ltr501_data {
+	struct i2c_client *client;
+	struct mutex lock_als, lock_ps;
+	u8 als_contr, ps_contr;
+};
+
+static int ltr501_drdy(struct ltr501_data *data, u8 drdy_mask)
+{
+	int tries = 100;
+	int ret;
+
+	while (tries--) {
+		ret = i2c_smbus_read_byte_data(data->client,
+			LTR501_ALS_PS_STATUS);
+		if (ret < 0)
+			return ret;
+		if ((ret & drdy_mask) == drdy_mask)
+			return 0;
+		msleep(25);
+	}
+
+	dev_err(&data->client->dev, "ltr501_drdy() failed, data not ready\n");
+	return -EIO;
+}
+
+static int ltr501_read_als(struct ltr501_data *data, __le16 buf[2])
+{
+	int ret = ltr501_drdy(data, LTR501_STATUS_ALS_RDY);
+	if (ret < 0)
+		return ret;
+	/* always read both ALS channels in given order */
+	return i2c_smbus_read_i2c_block_data(data->client,
+		LTR501_ALS_DATA1, 2 * sizeof(__le16), (u8 *) buf);
+}
+
+static int ltr501_read_ps(struct ltr501_data *data)
+{
+	int ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY);
+	if (ret < 0)
+		return ret;
+	return i2c_smbus_read_word_data(data->client, LTR501_PS_DATA);
+}
+
+#define LTR501_INTENSITY_CHANNEL(_idx, _addr, _mod, _shared) { \
+	.type = IIO_INTENSITY, \
+	.modified = 1, \
+	.address = (_addr), \
+	.channel2 = (_mod), \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+	.info_mask_shared_by_type = (_shared), \
+	.scan_index = (_idx), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = 16, \
+		.storagebits = 16, \
+		.endianness = IIO_CPU, \
+	} \
+}
+
+static const struct iio_chan_spec ltr501_channels[] = {
+	LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0),
+	LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,
+		BIT(IIO_CHAN_INFO_SCALE)),
+	{
+		.type = IIO_PROXIMITY,
+		.address = LTR501_PS_DATA,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+			BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 2,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 11,
+			.storagebits = 16,
+			.endianness = IIO_CPU,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const int ltr501_ps_gain[4][2] = {
+	{1, 0}, {0, 250000}, {0, 125000}, {0, 62500}
+};
+
+static int ltr501_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct ltr501_data *data = iio_priv(indio_dev);
+	__le16 buf[2];
+	int ret, i;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (iio_buffer_enabled(indio_dev))
+			return -EBUSY;
+
+		switch (chan->type) {
+		case IIO_INTENSITY:
+			mutex_lock(&data->lock_als);
+			ret = ltr501_read_als(data, buf);
+			mutex_unlock(&data->lock_als);
+			if (ret < 0)
+				return ret;
+			*val = le16_to_cpu(chan->address == LTR501_ALS_DATA1 ?
+				buf[0] : buf[1]);
+			return IIO_VAL_INT;
+		case IIO_PROXIMITY:
+			mutex_lock(&data->lock_ps);
+			ret = ltr501_read_ps(data);
+			mutex_unlock(&data->lock_ps);
+			if (ret < 0)
+				return ret;
+			*val = ret & LTR501_PS_DATA_MASK;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_INTENSITY:
+			if (data->als_contr & LTR501_CONTR_ALS_GAIN_MASK) {
+				*val = 0;
+				*val2 = 5000;
+				return IIO_VAL_INT_PLUS_MICRO;
+			} else {
+				*val = 1;
+				*val2 = 0;
+				return IIO_VAL_INT;
+			}
+		case IIO_PROXIMITY:
+			i = (data->ps_contr & LTR501_CONTR_PS_GAIN_MASK) >>
+				LTR501_CONTR_PS_GAIN_SHIFT;
+			*val = ltr501_ps_gain[i][0];
+			*val2 = ltr501_ps_gain[i][1];
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
+	}
+	return -EINVAL;
+}
+
+static int ltr501_get_ps_gain_index(int val, int val2)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ltr501_ps_gain); i++)
+		if (val == ltr501_ps_gain[i][0] && val2 == ltr501_ps_gain[i][1])
+			return i;
+
+	return -1;
+}
+
+static int ltr501_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val, int val2, long mask)
+{
+	struct ltr501_data *data = iio_priv(indio_dev);
+	int i;
+
+	if (iio_buffer_enabled(indio_dev))
+		return -EBUSY;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_INTENSITY:
+			if (val == 0 && val2 == 5000)
+				data->als_contr |= LTR501_CONTR_ALS_GAIN_MASK;
+			else if (val == 1 && val2 == 0)
+				data->als_contr &= ~LTR501_CONTR_ALS_GAIN_MASK;
+			else
+				return -EINVAL;
+			return i2c_smbus_write_byte_data(data->client,
+				LTR501_ALS_CONTR, data->als_contr);
+		case IIO_PROXIMITY:
+			i = ltr501_get_ps_gain_index(val, val2);
+			if (i < 0)
+				return -EINVAL;
+			data->ps_contr &= ~LTR501_CONTR_PS_GAIN_MASK;
+			data->ps_contr |= i << LTR501_CONTR_PS_GAIN_SHIFT;
+			return i2c_smbus_write_byte_data(data->client,
+				LTR501_PS_CONTR, data->ps_contr);
+		default:
+			return -EINVAL;
+		}
+	}
+	return -EINVAL;
+}
+
+static IIO_CONST_ATTR(in_proximity_scale_available, "1 0.25 0.125 0.0625");
+static IIO_CONST_ATTR(in_intensity_scale_available, "1 0.005");
+
+static struct attribute *ltr501_attributes[] = {
+	&iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+	&iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group ltr501_attribute_group = {
+	.attrs = ltr501_attributes,
+};
+
+static const struct iio_info ltr501_info = {
+	.read_raw = ltr501_read_raw,
+	.write_raw = ltr501_write_raw,
+	.attrs = &ltr501_attribute_group,
+	.driver_module = THIS_MODULE,
+};
+
+static int ltr501_write_contr(struct i2c_client *client, u8 als_val, u8 ps_val)
+{
+	int ret = i2c_smbus_write_byte_data(client, LTR501_ALS_CONTR, als_val);
+	if (ret < 0)
+		return ret;
+
+	return i2c_smbus_write_byte_data(client, LTR501_PS_CONTR, ps_val);
+}
+
+static irqreturn_t ltr501_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct ltr501_data *data = iio_priv(indio_dev);
+	u16 buf[8];
+	__le16 als_buf[2];
+	u8 mask = 0;
+	int j = 0;
+	int ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	/* figure out which data needs to be ready */
+	if (test_bit(0, indio_dev->active_scan_mask) ||
+		test_bit(1, indio_dev->active_scan_mask))
+		mask |= LTR501_STATUS_ALS_RDY;
+	if (test_bit(2, indio_dev->active_scan_mask))
+		mask |= LTR501_STATUS_PS_RDY;
+
+	ret = ltr501_drdy(data, mask);
+	if (ret < 0)
+		goto done;
+
+	if (mask & LTR501_STATUS_ALS_RDY) {
+		ret = i2c_smbus_read_i2c_block_data(data->client,
+			LTR501_ALS_DATA1, sizeof(als_buf), (u8 *) als_buf);
+		if (ret < 0)
+			return ret;
+		if (test_bit(0, indio_dev->active_scan_mask))
+			buf[j++] = le16_to_cpu(als_buf[1]);
+		if (test_bit(1, indio_dev->active_scan_mask))
+			buf[j++] = le16_to_cpu(als_buf[0]);
+	}
+
+	if (mask & LTR501_STATUS_PS_RDY) {
+		ret = i2c_smbus_read_word_data(data->client, LTR501_PS_DATA);
+		if (ret < 0)
+			goto done;
+		buf[j++] = ret & LTR501_PS_DATA_MASK;
+	}
+
+	iio_push_to_buffers_with_timestamp(indio_dev, buf,
+		iio_get_time_ns());
+
+done:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int ltr501_init(struct ltr501_data *data)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, LTR501_ALS_CONTR);
+	if (ret < 0)
+		return ret;
+	data->als_contr = ret | LTR501_CONTR_ACTIVE;
+
+	ret = i2c_smbus_read_byte_data(data->client, LTR501_PS_CONTR);
+	if (ret < 0)
+		return ret;
+	data->ps_contr = ret | LTR501_CONTR_ACTIVE;
+
+	return ltr501_write_contr(data->client, data->als_contr,
+		data->ps_contr);
+}
+
+static int ltr501_probe(struct i2c_client *client,
+			  const struct i2c_device_id *id)
+{
+	struct ltr501_data *data;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+	mutex_init(&data->lock_als);
+	mutex_init(&data->lock_ps);
+
+	ret = i2c_smbus_read_byte_data(data->client, LTR501_PART_ID);
+	if (ret < 0)
+		return ret;
+	if ((ret >> 4) != 0x8)
+		return -ENODEV;
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &ltr501_info;
+	indio_dev->channels = ltr501_channels;
+	indio_dev->num_channels = ARRAY_SIZE(ltr501_channels);
+	indio_dev->name = LTR501_DRV_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = ltr501_init(data);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_triggered_buffer_setup(indio_dev, NULL,
+		ltr501_trigger_handler, NULL);
+	if (ret)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto error_unreg_buffer;
+
+	return 0;
+
+error_unreg_buffer:
+	iio_triggered_buffer_cleanup(indio_dev);
+	return ret;
+}
+
+static int ltr501_powerdown(struct ltr501_data *data)
+{
+	return ltr501_write_contr(data->client,
+		data->als_contr & ~LTR501_CONTR_ACTIVE,
+		data->ps_contr & ~LTR501_CONTR_ACTIVE);
+}
+
+static int ltr501_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+	ltr501_powerdown(iio_priv(indio_dev));
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ltr501_suspend(struct device *dev)
+{
+	struct ltr501_data *data = iio_priv(i2c_get_clientdata(
+		to_i2c_client(dev)));
+	return ltr501_powerdown(data);
+}
+
+static int ltr501_resume(struct device *dev)
+{
+	struct ltr501_data *data = iio_priv(i2c_get_clientdata(
+		to_i2c_client(dev)));
+
+	return ltr501_write_contr(data->client, data->als_contr,
+		data->ps_contr);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);
+
+static const struct i2c_device_id ltr501_id[] = {
+	{ "ltr501", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, ltr501_id);
+
+static struct i2c_driver ltr501_driver = {
+	.driver = {
+		.name   = LTR501_DRV_NAME,
+		.pm	= &ltr501_pm_ops,
+		.owner  = THIS_MODULE,
+	},
+	.probe  = ltr501_probe,
+	.remove	= ltr501_remove,
+	.id_table = ltr501_id,
+};
+
+module_i2c_driver(ltr501_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Lite-On LTR501 ambient light and proximity sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tcs3472.c b/drivers/iio/light/tcs3472.c
index 887fecf1f9b..fe063a0a21c 100644
--- a/drivers/iio/light/tcs3472.c
+++ b/drivers/iio/light/tcs3472.c
@@ -179,7 +179,6 @@ static irqreturn_t tcs3472_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct tcs3472_data *data = iio_priv(indio_dev);
-	int len = 0;
 	int i, j = 0;
 
 	int ret = tcs3472_req_data(data);
@@ -194,7 +193,6 @@ static irqreturn_t tcs3472_trigger_handler(int irq, void *p)
 			goto done;
 
 		data->buffer[j++] = ret;
-		len += 2;
 	}
 
 	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 05423543f89..74866d1efd1 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -513,6 +513,7 @@ static int ak8975_probe(struct i2c_client *client,
 	indio_dev->channels = ak8975_channels;
 	indio_dev->num_channels = ARRAY_SIZE(ak8975_channels);
 	indio_dev->info = &ak8975_info;
+	indio_dev->name = id->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	err = iio_device_register(indio_dev);
diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c
index ac8c8ab723e..ba6d0c520e6 100644
--- a/drivers/iio/pressure/mpl3115.c
+++ b/drivers/iio/pressure/mpl3115.c
@@ -77,7 +77,7 @@ static int mpl3115_read_raw(struct iio_dev *indio_dev,
 			    int *val, int *val2, long mask)
 {
 	struct mpl3115_data *data = iio_priv(indio_dev);
-	s32 tmp = 0;
+	__be32 tmp = 0;
 	int ret;
 
 	switch (mask) {
diff --git a/drivers/staging/iio/accel/sca3000.h b/drivers/staging/iio/accel/sca3000.h
index c1016c510da..b284e5a6cac 100644
--- a/drivers/staging/iio/accel/sca3000.h
+++ b/drivers/staging/iio/accel/sca3000.h
@@ -65,7 +65,8 @@
 
 #define SCA3000_RING_BUF_ENABLE			0x80
 #define SCA3000_RING_BUF_8BIT			0x40
-/* Free fall detection triggers an interrupt if the acceleration
+/*
+ * Free fall detection triggers an interrupt if the acceleration
  * is below a threshold for equivalent of 25cm drop
  */
 #define SCA3000_FREE_FALL_DETECT		0x10
@@ -73,8 +74,9 @@
 #define SCA3000_MEAS_MODE_OP_1			0x01
 #define SCA3000_MEAS_MODE_OP_2			0x02
 
-/* In motion detection mode the accelerations are band pass filtered
- * (aprox 1 - 25Hz) and then a programmable threshold used to trigger
+/*
+ * In motion detection mode the accelerations are band pass filtered
+ * (approx 1 - 25Hz) and then a programmable threshold used to trigger
  * and interrupt.
  */
 #define SCA3000_MEAS_MODE_MOT_DET		0x03
@@ -99,8 +101,10 @@
 #define SCA3000_REG_CTRL_SEL_MD_Y_TH		0x03
 #define SCA3000_REG_CTRL_SEL_MD_X_TH		0x04
 #define SCA3000_REG_CTRL_SEL_MD_Z_TH		0x05
-/* BE VERY CAREFUL WITH THIS, IF 3 BITS ARE NOT SET the device
-   will not function */
+/*
+ * BE VERY CAREFUL WITH THIS, IF 3 BITS ARE NOT SET the device
+ * will not function
+ */
 #define SCA3000_REG_CTRL_SEL_OUT_CTRL		0x0B
 #define SCA3000_OUT_CTRL_PROT_MASK		0xE0
 #define SCA3000_OUT_CTRL_BUF_X_EN		0x10
@@ -109,8 +113,9 @@
 #define SCA3000_OUT_CTRL_BUF_DIV_4		0x02
 #define SCA3000_OUT_CTRL_BUF_DIV_2		0x01
 
-/* Control which motion detector interrupts are on.
- * For now only OR combinations are supported.x
+/*
+ * Control which motion detector interrupts are on.
+ * For now only OR combinations are supported.
  */
 #define SCA3000_MD_CTRL_PROT_MASK		0xC0
 #define SCA3000_MD_CTRL_OR_Y			0x01
@@ -121,7 +126,8 @@
 #define SCA3000_MD_CTRL_AND_X			0x10
 #define SAC3000_MD_CTRL_AND_Z			0x20
 
-/* Some control registers of complex access methods requiring this register to
+/*
+ * Some control registers of complex access methods requiring this register to
  * be used to remove a lock.
  */
 #define SCA3000_REG_ADDR_UNLOCK			0x1e
@@ -139,7 +145,8 @@
 /* Values of multiplexed registers (write to ctrl_data after select) */
 #define SCA3000_REG_ADDR_CTRL_DATA		0x22
 
-/* Measurement modes available on some sca3000 series chips. Code assumes others
+/*
+ * Measurement modes available on some sca3000 series chips. Code assumes others
  * may become available in the future.
  *
  * Bypass - Bypass the low-pass filter in the signal channel so as to increase
@@ -160,7 +167,6 @@
  * struct sca3000_state - device instance state information
  * @us:			the associated spi device
  * @info:			chip variant information
- * @indio_dev:			device information used by the IIO core
  * @interrupt_handler_ws:	event interrupt handler for all events
  * @last_timestamp:		the timestamp of the last event
  * @mo_det_use_count:		reference counter for the motion detection unit
diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
index 7f6ccdfaf16..ed30e32e60d 100644
--- a/drivers/staging/iio/accel/sca3000_core.c
+++ b/drivers/staging/iio/accel/sca3000_core.c
@@ -32,7 +32,8 @@ enum sca3000_variant {
 	e05,
 };
 
-/* Note where option modes are not defined, the chip simply does not
+/*
+ * Note where option modes are not defined, the chip simply does not
  * support any.
  * Other chips in the sca3000 series use i2c and are not included here.
  *
@@ -191,7 +192,6 @@ error_ret:
 	return ret;
 }
 
-/* Crucial that lock is called before calling this */
 /**
  * sca3000_read_ctrl_reg() read from lock protected control register.
  *
@@ -250,9 +250,8 @@ error_ret:
 }
 #endif /* SCA3000_DEBUG */
 
-
 /**
- * sca3000_show_reg() - sysfs interface to read the chip revision number
+ * sca3000_show_rev() - sysfs interface to read the chip revision number
  **/
 static ssize_t sca3000_show_rev(struct device *dev,
 				struct device_attribute *attr,
@@ -312,7 +311,7 @@ sca3000_show_available_measurement_modes(struct device *dev,
 }
 
 /**
- * sca3000_show_measurmenet_mode() sysfs read of current mode
+ * sca3000_show_measurement_mode() sysfs read of current mode
  **/
 static ssize_t
 sca3000_show_measurement_mode(struct device *dev,
@@ -403,7 +402,8 @@ error_ret:
 }
 
 
-/* Not even vaguely standard attributes so defined here rather than
+/*
+ * Not even vaguely standard attributes so defined here rather than
  * in the relevant IIO core headers
  */
 static IIO_DEVICE_ATTR(measurement_mode_available, S_IRUGO,
@@ -450,6 +450,18 @@ static const struct iio_chan_spec sca3000_channels[] = {
 	SCA3000_CHAN(2, IIO_MOD_Z),
 };
 
+static const struct iio_chan_spec sca3000_channels_with_temp[] = {
+	SCA3000_CHAN(0, IIO_MOD_X),
+	SCA3000_CHAN(1, IIO_MOD_Y),
+	SCA3000_CHAN(2, IIO_MOD_Z),
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
+			BIT(IIO_CHAN_INFO_OFFSET),
+	},
+};
+
 static u8 sca3000_addresses[3][3] = {
 	[0] = {SCA3000_REG_ADDR_X_MSB, SCA3000_REG_CTRL_SEL_MD_X_TH,
 	       SCA3000_MD_CTRL_OR_X},
@@ -472,19 +484,30 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		mutex_lock(&st->lock);
-		if (st->mo_det_use_count) {
-			mutex_unlock(&st->lock);
-			return -EBUSY;
-		}
-		address = sca3000_addresses[chan->address][0];
-		ret = sca3000_read_data_short(st, address, 2);
-		if (ret < 0) {
-			mutex_unlock(&st->lock);
-			return ret;
+		if (chan->type == IIO_ACCEL) {
+			if (st->mo_det_use_count) {
+				mutex_unlock(&st->lock);
+				return -EBUSY;
+			}
+			address = sca3000_addresses[chan->address][0];
+			ret = sca3000_read_data_short(st, address, 2);
+			if (ret < 0) {
+				mutex_unlock(&st->lock);
+				return ret;
+			}
+			*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
+			*val = ((*val) << (sizeof(*val)*8 - 13)) >>
+				(sizeof(*val)*8 - 13);
+		} else {
+			/* get the temperature when available */
+			ret = sca3000_read_data_short(st,
+				SCA3000_REG_ADDR_TEMP_MSB, 2);
+			if (ret < 0) {
+				mutex_unlock(&st->lock);
+				return ret;
+			}
+			*val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5);
 		}
-		*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
-		*val = ((*val) << (sizeof(*val)*8 - 13)) >>
-			(sizeof(*val)*8 - 13);
 		mutex_unlock(&st->lock);
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
@@ -494,6 +517,10 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
 		else /* temperature */
 			*val2 = 555556;
 		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = -214;
+		*val2 = 600000;
+		return IIO_VAL_INT_PLUS_MICRO;
 	default:
 		return -EINVAL;
 	}
@@ -547,7 +574,7 @@ error_ret:
 	return ret;
 }
 /**
- * __sca3000_get_base_frequency() obtain mode specific base frequency
+ * __sca3000_get_base_freq() obtain mode specific base frequency
  *
  * lock must be held
  **/
@@ -663,7 +690,8 @@ error_free_lock:
 	return ret ? ret : len;
 }
 
-/* Should only really be registered if ring buffer support is compiled in.
+/*
+ * Should only really be registered if ring buffer support is compiled in.
  * Does no harm however and doing it right would add a fair bit of complexity
  */
 static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(sca3000_read_av_freq);
@@ -672,37 +700,6 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
 			      sca3000_read_frequency,
 			      sca3000_set_frequency);
 
-
-/**
- * sca3000_read_temp() sysfs interface to get the temperature when available
- *
-* The alignment of data in here is downright odd. See data sheet.
-* Converting this into a meaningful value is left to inline functions in
-* userspace part of header.
-**/
-static ssize_t sca3000_read_temp(struct device *dev,
-				 struct device_attribute *attr,
-				 char *buf)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct sca3000_state *st = iio_priv(indio_dev);
-	int ret;
-	int val;
-	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_TEMP_MSB, 2);
-	if (ret < 0)
-		goto error_ret;
-	val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5);
-
-	return sprintf(buf, "%d\n", val);
-
-error_ret:
-	return ret;
-}
-static IIO_DEV_ATTR_TEMP_RAW(sca3000_read_temp);
-
-static IIO_CONST_ATTR_TEMP_SCALE("0.555556");
-static IIO_CONST_ATTR_TEMP_OFFSET("-214.6");
-
 /**
  * sca3000_read_thresh() - query of a threshold
  **/
@@ -782,33 +779,16 @@ static struct attribute *sca3000_attributes[] = {
 	NULL,
 };
 
-static struct attribute *sca3000_attributes_with_temp[] = {
-	&iio_dev_attr_revision.dev_attr.attr,
-	&iio_dev_attr_measurement_mode_available.dev_attr.attr,
-	&iio_dev_attr_measurement_mode.dev_attr.attr,
-	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
-	&iio_dev_attr_sampling_frequency.dev_attr.attr,
-	/* Only present if temp sensor is */
-	&iio_dev_attr_in_temp_raw.dev_attr.attr,
-	&iio_const_attr_in_temp_offset.dev_attr.attr,
-	&iio_const_attr_in_temp_scale.dev_attr.attr,
-	NULL,
-};
-
 static const struct attribute_group sca3000_attribute_group = {
 	.attrs = sca3000_attributes,
 };
 
-static const struct attribute_group sca3000_attribute_group_with_temp = {
-	.attrs = sca3000_attributes_with_temp,
-};
-
-/* RING RELATED interrupt handler */
-/* depending on event, push to the ring buffer event chrdev or the event one */
-
 /**
  * sca3000_event_handler() - handling ring and non ring events
  *
+ * Ring related interrupt handler. Depending on event, push to
+ * the ring buffer event chrdev or the event one.
+ *
  * This function is complicated by the fact that the devices can signify ring
  * and non ring events via the same interrupt line and they can only
  * be distinguished via a read of the relevant status register.
@@ -820,7 +800,8 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 	int ret, val;
 	s64 last_timestamp = iio_get_time_ns();
 
-	/* Could lead if badly timed to an extra read of status reg,
+	/*
+	 * Could lead if badly timed to an extra read of status reg,
 	 * but ensures no interrupt is missed.
 	 */
 	mutex_lock(&st->lock);
@@ -935,7 +916,6 @@ static ssize_t sca3000_query_free_fall_mode(struct device *dev,
  * the device falls more than 25cm.  This has not been tested due
  * to fragile wiring.
  **/
-
 static ssize_t sca3000_set_free_fall_mode(struct device *dev,
 					  struct device_attribute *attr,
 					  const char *buf,
@@ -957,7 +937,7 @@ static ssize_t sca3000_set_free_fall_mode(struct device *dev,
 	if (ret)
 		goto error_ret;
 
-	/*if off and should be on*/
+	/* if off and should be on */
 	if (val && !(st->rx[0] & protect_mask))
 		ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
 					(st->rx[0] | SCA3000_FREE_FALL_DETECT));
@@ -972,7 +952,7 @@ error_ret:
 }
 
 /**
- * sca3000_set_mo_det() simple on off control for motion detector
+ * sca3000_write_event_config() simple on off control for motion detector
  *
  * This is a per axis control, but enabling any will result in the
  * motion detector unit being enabled.
@@ -992,13 +972,15 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev,
 	int num = chan->channel2;
 
 	mutex_lock(&st->lock);
-	/* First read the motion detector config to find out if
-	 * this axis is on*/
+	/*
+	 * First read the motion detector config to find out if
+	 * this axis is on
+	 */
 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
 	if (ret < 0)
 		goto exit_point;
 	ctrlval = ret;
-	/* Off and should be on */
+	/* if off and should be on */
 	if (state && !(ctrlval & sca3000_addresses[num][2])) {
 		ret = sca3000_write_ctrl_reg(st,
 					     SCA3000_REG_CTRL_SEL_MD_CTRL,
@@ -1021,7 +1003,7 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev,
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
 	if (ret)
 		goto exit_point;
-	/*if off and should be on*/
+	/* if off and should be on */
 	if ((st->mo_det_use_count)
 	    && ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET))
 		ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
@@ -1067,7 +1049,7 @@ static struct attribute_group sca3000_event_attribute_group = {
  * Devices use flash memory to store many of the register values
  * and hence can come up in somewhat unpredictable states.
  * Hence reset everything on driver load.
-  **/
+ **/
 static int sca3000_clean_setup(struct sca3000_state *st)
 {
 	int ret;
@@ -1107,9 +1089,11 @@ static int sca3000_clean_setup(struct sca3000_state *st)
 				| SCA3000_INT_MASK_ACTIVE_LOW);
 	if (ret)
 		goto error_ret;
-	/* Select normal measurement mode, free fall off, ring off */
-	/* Ring in 12 bit mode - it is fine to overwrite reserved bits 3,5
-	 * as that occurs in one of the example on the datasheet */
+	/*
+	 * Select normal measurement mode, free fall off, ring off
+	 * Ring in 12 bit mode - it is fine to overwrite reserved bits 3,5
+	 * as that occurs in one of the example on the datasheet
+	 */
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
 	if (ret)
 		goto error_ret;
@@ -1133,16 +1117,6 @@ static const struct iio_info sca3000_info = {
 	.driver_module = THIS_MODULE,
 };
 
-static const struct iio_info sca3000_info_with_temp = {
-	.attrs = &sca3000_attribute_group_with_temp,
-	.read_raw = &sca3000_read_raw,
-	.read_event_value = &sca3000_read_thresh,
-	.write_event_value = &sca3000_write_thresh,
-	.read_event_config = &sca3000_read_event_config,
-	.write_event_config = &sca3000_write_event_config,
-	.driver_module = THIS_MODULE,
-};
-
 static int sca3000_probe(struct spi_device *spi)
 {
 	int ret;
@@ -1162,10 +1136,12 @@ static int sca3000_probe(struct spi_device *spi)
 
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
-	if (st->info->temp_output)
-		indio_dev->info = &sca3000_info_with_temp;
-	else {
-		indio_dev->info = &sca3000_info;
+	indio_dev->info = &sca3000_info;
+	if (st->info->temp_output) {
+		indio_dev->channels = sca3000_channels_with_temp;
+		indio_dev->num_channels =
+			ARRAY_SIZE(sca3000_channels_with_temp);
+	} else {
 		indio_dev->channels = sca3000_channels;
 		indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
 	}
@@ -1236,7 +1212,7 @@ static int sca3000_remove(struct spi_device *spi)
 	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 	struct sca3000_state *st = iio_priv(indio_dev);
 
-	/* Must ensure no interrupts can be generated after this!*/
+	/* Must ensure no interrupts can be generated after this! */
 	sca3000_stop_all_interrupts(st);
 	if (spi->irq)
 		free_irq(spi->irq, indio_dev);
diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index 7fc66a6a6e3..d304156ca2f 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -897,10 +897,6 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev,
 {
 	struct mxs_lradc *lradc = iio_priv(iio_dev);
 
-	/* Check for invalid channel */
-	if (chan->channel > LRADC_MAX_TOTAL_CHANS)
-		return -EINVAL;
-
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
 		if (chan->type == IIO_TEMP)