Merge tag 'iio-for-3.14b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

2nd round of new IIO drivers, features and cleanups for the 3.14 cycle.

New drivers

* HID inclinometer driver.

* DHT11 humidity driver.  Note that previous humidity drivers have been in
  hwmon, but no one was ever entirely happy with that, and they should find
  a more comfortable home in IIO (their original placement in hwmon was my
  fault - oops).  As this is our first humidity driver, core support is also
  added.

New features

* Two of mxs-lradc channels are internally wired to a temperature sensor,
  make this explicit in the driver by providing the relevant temperature
  channel.

* Add support for blocking IO on buffers.

* Add a data_available call back to the interface between buffer implementations
  and the core.  This is much cleaner than the old, 'stufftoread' flag.
  Implemented in the kfifo buffer.

Cleanups

* Last user of the old event configuration interface is converted and the
  old interface dropped.  Nice to be rid of this thanks to Lars-Peter's hard
  work!

* Replace all remaining instances of the IIO_ST macro with explicit filling
  of the scan_type structure within struct iio_chan_spec.  This macro was a
  bad idea, that rapidly ceased to cover all elements of the structure.
  Miss reading of the macro arguements has led to a number of bugs so lets
  just get rid of it. The final removal patch is awaiting for some fixes
  to make their way into mainline.
  In a couple of drivers, no elements of scan_type were even being used so
  in those case, it has been dropped entirely.

* Drop a couple of of_match_ptr helper uses in drivers where devicetree is
  not optional and hence the structures being protected by this always exist.

* Fix up some cases where data was read from a device in a particular
  byte order, but he code placed it into a s16 or similar.  These were
  highlighted by Sparse.

* Use the new ATTRIBUTE_GROUPS macro to drop some boiler plate in the triggers
  core code.

* ad7746 and ad7280a - stop storing buffers on the stack, giving cleaner code
  and possibly avoiding issues with i2c bus drivers that assume they can dma
  directly into the buffer.  Note that this cannot currently happen as the the
  i2c_smbus_read_i2c_block_data function has a memcpy from the buffer actually
  passed to the bus driver.  I missed this element of the commit message
  and don't think it is major enough to rebase the iio tree.

* ad5791 and ad5504 stop storing buffers on the stack for an SPI driver.
  Unlike the i2c drivers, this is a real issue for SPI drivers which can dma
  directly into the buffer supplied.

38 files changed, 1042 insertions, 257 deletions

diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 90cf0cd..5dd0e12 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -65,9 +65,11 @@ source "drivers/iio/common/Kconfig"
 source "drivers/iio/dac/Kconfig"
 source "drivers/iio/frequency/Kconfig"
 source "drivers/iio/gyro/Kconfig"
+source "drivers/iio/humidity/Kconfig"
 source "drivers/iio/imu/Kconfig"
 source "drivers/iio/light/Kconfig"
 source "drivers/iio/magnetometer/Kconfig"
+source "drivers/iio/orientation/Kconfig"
 if IIO_TRIGGER
    source "drivers/iio/trigger/Kconfig"
 endif #IIO_TRIGGER
diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index bcf7e9e..887d3909 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -18,9 +18,11 @@ obj-y += common/
 obj-y += dac/
 obj-y += gyro/
 obj-y += frequency/
+obj-y += humidity/
 obj-y += imu/
 obj-y += light/
 obj-y += magnetometer/
+obj-y += orientation/
 obj-y += pressure/
 obj-y += temperature/
 obj-y += trigger/
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index 28b3928..3bec922 100644
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -455,7 +455,12 @@ static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
 		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),		\
 	.scan_index = (_index),						\
-	.scan_type = IIO_ST('s', 14, 16, 2),				\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 14,						\
+		.storagebits = 16,					\
+		.shift = 2,						\
+	},								\
 	.ext_info = bma180_ext_info,					\
 }
 
diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 58e9455..70f78c3 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -43,19 +43,22 @@ struct ad7266_state {
 	 * The buffer needs to be large enough to hold two samples (4 bytes) and
 	 * the naturally aligned timestamp (8 bytes).
 	 */
-	uint8_t data[ALIGN(4, sizeof(s64)) + sizeof(s64)] ____cacheline_aligned;
+	struct {
+		__be16 sample[2];
+		s64 timestamp;
+	} data ____cacheline_aligned;
 };
 
 static int ad7266_wakeup(struct ad7266_state *st)
 {
 	/* Any read with >= 2 bytes will wake the device */
-	return spi_read(st->spi, st->data, 2);
+	return spi_read(st->spi, &st->data.sample[0], 2);
 }
 
 static int ad7266_powerdown(struct ad7266_state *st)
 {
 	/* Any read with < 2 bytes will powerdown the device */
-	return spi_read(st->spi, st->data, 1);
+	return spi_read(st->spi, &st->data.sample[0], 1);
 }
 
 static int ad7266_preenable(struct iio_dev *indio_dev)
@@ -84,9 +87,9 @@ static irqreturn_t ad7266_trigger_handler(int irq, void *p)
 	struct ad7266_state *st = iio_priv(indio_dev);
 	int ret;
 
-	ret = spi_read(st->spi, st->data, 4);
+	ret = spi_read(st->spi, st->data.sample, 4);
 	if (ret == 0) {
-		iio_push_to_buffers_with_timestamp(indio_dev, st->data,
+		iio_push_to_buffers_with_timestamp(indio_dev, &st->data,
 			    pf->timestamp);
 	}
 
@@ -137,7 +140,7 @@ static int ad7266_read_single(struct ad7266_state *st, int *val,
 	ad7266_select_input(st, address);
 
 	ret = spi_sync(st->spi, &st->single_msg);
-	*val = be16_to_cpu(st->data[address % 2]);
+	*val = be16_to_cpu(st->data.sample[address % 2]);
 
 	return ret;
 }
@@ -442,15 +445,15 @@ static int ad7266_probe(struct spi_device *spi)
 	ad7266_init_channels(indio_dev);
 
 	/* wakeup */
-	st->single_xfer[0].rx_buf = &st->data;
+	st->single_xfer[0].rx_buf = &st->data.sample[0];
 	st->single_xfer[0].len = 2;
 	st->single_xfer[0].cs_change = 1;
 	/* conversion */
-	st->single_xfer[1].rx_buf = &st->data;
+	st->single_xfer[1].rx_buf = st->data.sample;
 	st->single_xfer[1].len = 4;
 	st->single_xfer[1].cs_change = 1;
 	/* powerdown */
-	st->single_xfer[2].tx_buf = &st->data;
+	st->single_xfer[2].tx_buf = &st->data.sample[0];
 	st->single_xfer[2].len = 1;
 
 	spi_message_init(&st->single_msg);
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index 6118dce..e283f2f 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -1039,10 +1039,10 @@ static const struct iio_info max1238_info = {
 };
 
 static const struct iio_info max1363_info = {
-	.read_event_value_new = &max1363_read_thresh,
-	.write_event_value_new = &max1363_write_thresh,
-	.read_event_config_new = &max1363_read_event_config,
-	.write_event_config_new = &max1363_write_event_config,
+	.read_event_value = &max1363_read_thresh,
+	.write_event_value = &max1363_write_thresh,
+	.read_event_config = &max1363_read_event_config,
+	.write_event_config = &max1363_write_event_config,
 	.read_raw = &max1363_read_raw,
 	.update_scan_mode = &max1363_update_scan_mode,
 	.driver_module = THIS_MODULE,
diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c
index cb9c636..f03b92f 100644
--- a/drivers/iio/dac/ad5064.c
+++ b/drivers/iio/dac/ad5064.c
@@ -299,7 +299,12 @@ static const struct iio_chan_spec_ext_info ad5064_ext_info[] = {
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
 	BIT(IIO_CHAN_INFO_SCALE),					\
 	.address = addr,					\
-	.scan_type = IIO_ST('u', (bits), 16, 20 - (bits)),	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (bits),				\
+		.storagebits = 16,				\
+		.shift = 20 - bits,				\
+	},							\
 	.ext_info = ad5064_ext_info,				\
 }
 
diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c
index b968af5..64634d7 100644
--- a/drivers/iio/dac/ad5360.c
+++ b/drivers/iio/dac/ad5360.c
@@ -107,7 +107,12 @@ enum ad5360_type {
 		BIT(IIO_CHAN_INFO_OFFSET) |				\
 		BIT(IIO_CHAN_INFO_CALIBSCALE) |			\
 		BIT(IIO_CHAN_INFO_CALIBBIAS),			\
-	.scan_type = IIO_ST('u', (bits), 16, 16 - (bits))	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (bits),				\
+		.storagebits = 16,				\
+		.shift = 16 - (bits),				\
+	},							\
 }
 
 static const struct ad5360_chip_info ad5360_chip_info_tbl[] = {
diff --git a/drivers/iio/dac/ad5380.c b/drivers/iio/dac/ad5380.c
index a59ff0e..9de4c4d 100644
--- a/drivers/iio/dac/ad5380.c
+++ b/drivers/iio/dac/ad5380.c
@@ -261,7 +261,12 @@ static struct iio_chan_spec_ext_info ad5380_ext_info[] = {
 		BIT(IIO_CHAN_INFO_CALIBSCALE) |			\
 		BIT(IIO_CHAN_INFO_CALIBBIAS),			\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
-	.scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits)),	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (_bits),				\
+		.storagebits =  16,				\
+		.shift = 14 - (_bits),				\
+	},							\
 	.ext_info = ad5380_ext_info,				\
 }
 
diff --git a/drivers/iio/dac/ad5421.c b/drivers/iio/dac/ad5421.c
index 7d1e908..787ef1d 100644
--- a/drivers/iio/dac/ad5421.c
+++ b/drivers/iio/dac/ad5421.c
@@ -75,7 +75,7 @@ struct ad5421_state {
 	 * transfer buffers to live in their own cache lines.
 	 */
 	union {
-		u32 d32;
+		__be32 d32;
 		u8 d8[4];
 	} data[2] ____cacheline_aligned;
 };
@@ -114,7 +114,11 @@ static const struct iio_chan_spec ad5421_channels[] = {
 			BIT(IIO_CHAN_INFO_CALIBBIAS),
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
 			BIT(IIO_CHAN_INFO_OFFSET),
-		.scan_type = IIO_ST('u', 16, 16, 0),
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 16,
+			.storagebits = 16,
+		},
 		.event_spec = ad5421_current_event,
 		.num_event_specs = ARRAY_SIZE(ad5421_current_event),
 	},
@@ -458,9 +462,9 @@ static int ad5421_read_event_value(struct iio_dev *indio_dev,
 static const struct iio_info ad5421_info = {
 	.read_raw =		ad5421_read_raw,
 	.write_raw =		ad5421_write_raw,
-	.read_event_config_new = ad5421_read_event_config,
-	.write_event_config_new = ad5421_write_event_config,
-	.read_event_value_new =	ad5421_read_event_value,
+	.read_event_config =	ad5421_read_event_config,
+	.write_event_config =	ad5421_write_event_config,
+	.read_event_value =	ad5421_read_event_value,
 	.driver_module =	THIS_MODULE,
 };
 
diff --git a/drivers/iio/dac/ad5446.c b/drivers/iio/dac/ad5446.c
index 1263b0e..46bb62a 100644
--- a/drivers/iio/dac/ad5446.c
+++ b/drivers/iio/dac/ad5446.c
@@ -139,14 +139,19 @@ static const struct iio_chan_spec_ext_info ad5446_ext_info_powerdown[] = {
 	{ },
 };
 
-#define _AD5446_CHANNEL(bits, storage, shift, ext) { \
+#define _AD5446_CHANNEL(bits, storage, _shift, ext) { \
 	.type = IIO_VOLTAGE, \
 	.indexed = 1, \
 	.output = 1, \
 	.channel = 0, \
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
-	.scan_type = IIO_ST('u', (bits), (storage), (shift)), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = (bits), \
+		.storagebits = (storage), \
+		.shift = (_shift), \
+		}, \
 	.ext_info = (ext), \
 }
 
diff --git a/drivers/iio/dac/ad5449.c b/drivers/iio/dac/ad5449.c
index 82e208f..64d7256 100644
--- a/drivers/iio/dac/ad5449.c
+++ b/drivers/iio/dac/ad5449.c
@@ -204,7 +204,12 @@ static const struct iio_info ad5449_info = {
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
 		BIT(IIO_CHAN_INFO_SCALE),			\
 	.address = (chan),					\
-	.scan_type = IIO_ST('u', (bits), 16, 12 - (bits)),	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (bits),				\
+		.storagebits = 16,				\
+		.shift = 12 - (bits),				\
+	},							\
 }
 
 #define DECLARE_AD5449_CHANNELS(name, bits) \
diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c
index c0957a9..1e64493 100644
--- a/drivers/iio/dac/ad5504.c
+++ b/drivers/iio/dac/ad5504.c
@@ -47,14 +47,16 @@
  * @vref_mv:		actual reference voltage used
  * @pwr_down_mask	power down mask
  * @pwr_down_mode	current power down mode
+ * @data:		transfer buffer
  */
-
 struct ad5504_state {
 	struct spi_device		*spi;
 	struct regulator		*reg;
 	unsigned short			vref_mv;
 	unsigned			pwr_down_mask;
 	unsigned			pwr_down_mode;
+
+	__be16				data[2] ____cacheline_aligned;
 };
 
 /**
@@ -66,31 +68,29 @@ enum ad5504_supported_device_ids {
 	ID_AD5501,
 };
 
-static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
+static int ad5504_spi_write(struct ad5504_state *st, u8 addr, u16 val)
 {
-	u16 tmp = cpu_to_be16(AD5504_CMD_WRITE |
-			      AD5504_ADDR(addr) |
+	st->data[0] = cpu_to_be16(AD5504_CMD_WRITE | AD5504_ADDR(addr) |
 			      (val & AD5504_RES_MASK));
 
-	return spi_write(spi, (u8 *)&tmp, 2);
+	return spi_write(st->spi, &st->data[0], 2);
 }
 
-static int ad5504_spi_read(struct spi_device *spi, u8 addr)
+static int ad5504_spi_read(struct ad5504_state *st, u8 addr)
 {
-	u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
-	u16 val;
 	int ret;
-	struct spi_transfer	t = {
-			.tx_buf		= &tmp,
-			.rx_buf		= &val,
-			.len		= 2,
-		};
-	ret = spi_sync_transfer(spi, &t, 1);
-
+	struct spi_transfer t = {
+	    .tx_buf = &st->data[0],
+	    .rx_buf = &st->data[1],
+	    .len = 2,
+	};
+
+	st->data[0] = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
+	ret = spi_sync_transfer(st->spi, &t, 1);
 	if (ret < 0)
 		return ret;
 
-	return be16_to_cpu(val) & AD5504_RES_MASK;
+	return be16_to_cpu(st->data[1]) & AD5504_RES_MASK;
 }
 
 static int ad5504_read_raw(struct iio_dev *indio_dev,
@@ -104,7 +104,7 @@ static int ad5504_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = ad5504_spi_read(st->spi, chan->address);
+		ret = ad5504_spi_read(st, chan->address);
 		if (ret < 0)
 			return ret;
 
@@ -133,7 +133,7 @@ static int ad5504_write_raw(struct iio_dev *indio_dev,
 		if (val >= (1 << chan->scan_type.realbits) || val < 0)
 			return -EINVAL;
 
-		return ad5504_spi_write(st->spi, chan->address, val);
+		return ad5504_spi_write(st, chan->address, val);
 	default:
 		ret = -EINVAL;
 	}
@@ -197,12 +197,12 @@ static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev,
 	else
 		st->pwr_down_mask &= ~(1 << chan->channel);
 
-	ret = ad5504_spi_write(st->spi, AD5504_ADDR_CTRL,
+	ret = ad5504_spi_write(st, AD5504_ADDR_CTRL,
 				AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) |
 				AD5504_DAC_PWR(st->pwr_down_mask));
 
 	/* writes to the CTRL register must be followed by a NOOP */
-	ad5504_spi_write(st->spi, AD5504_ADDR_NOOP, 0);
+	ad5504_spi_write(st, AD5504_ADDR_NOOP, 0);
 
 	return ret ? ret : len;
 }
@@ -261,7 +261,11 @@ static const struct iio_chan_spec_ext_info ad5504_ext_info[] = {
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
 	.address = AD5504_ADDR_DAC(_chan), \
-	.scan_type = IIO_ST('u', 12, 16, 0), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = 12, \
+		.storagebits = 16, \
+	}, \
 	.ext_info = ad5504_ext_info, \
 }
 
diff --git a/drivers/iio/dac/ad5624r_spi.c b/drivers/iio/dac/ad5624r_spi.c
index 774dd96..e8199cc 100644
--- a/drivers/iio/dac/ad5624r_spi.c
+++ b/drivers/iio/dac/ad5624r_spi.c
@@ -176,7 +176,12 @@ static const struct iio_chan_spec_ext_info ad5624r_ext_info[] = {
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
 	.address = (_chan), \
-	.scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = (_bits), \
+		.storagebits = 16, \
+		.shift = 16 - (_bits), \
+	}, \
 	.ext_info = ad5624r_ext_info, \
 }
 
diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index 30e506e..17aca4d 100644
--- a/drivers/iio/dac/ad5686.c
+++ b/drivers/iio/dac/ad5686.c
@@ -78,7 +78,7 @@ struct ad5686_state {
 	 */
 
 	union {
-		u32 d32;
+		__be32 d32;
 		u8 d8[4];
 	} data[3] ____cacheline_aligned;
 };
@@ -267,7 +267,7 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = {
 	{ },
 };
 
-#define AD5868_CHANNEL(chan, bits, shift) {			\
+#define AD5868_CHANNEL(chan, bits, _shift) {			\
 		.type = IIO_VOLTAGE,				\
 		.indexed = 1,					\
 		.output = 1,					\
@@ -275,7 +275,12 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = {
 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\
 		.address = AD5686_ADDR_DAC(chan),		\
-		.scan_type = IIO_ST('u', bits, 16, shift),	\
+		.scan_type = {					\
+			.sign = 'u',				\
+			.realbits = (bits),			\
+			.storagebits = 16,			\
+			.shift = (_shift),			\
+		},						\
 		.ext_info = ad5686_ext_info,			\
 }
 
diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c
index ee1e95a..a7c851f 100644
--- a/drivers/iio/dac/ad5755.c
+++ b/drivers/iio/dac/ad5755.c
@@ -97,7 +97,7 @@ struct ad5755_state {
 	 */
 
 	union {
-		u32 d32;
+		__be32 d32;
 		u8 d8[4];
 	} data[2] ____cacheline_aligned;
 };
@@ -392,7 +392,12 @@ static const struct iio_chan_spec_ext_info ad5755_ext_info[] = {
 		BIT(IIO_CHAN_INFO_OFFSET) |			\
 		BIT(IIO_CHAN_INFO_CALIBSCALE) |			\
 		BIT(IIO_CHAN_INFO_CALIBBIAS),			\
-	.scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)),	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (_bits),				\
+		.storagebits = 16,				\
+		.shift = 16 - (_bits),				\
+	},							\
 	.ext_info = ad5755_ext_info,				\
 }
 
diff --git a/drivers/iio/dac/ad5764.c b/drivers/iio/dac/ad5764.c
index a8ff5b2..d0d3816 100644
--- a/drivers/iio/dac/ad5764.c
+++ b/drivers/iio/dac/ad5764.c
@@ -83,7 +83,12 @@ enum ad5764_type {
 		BIT(IIO_CHAN_INFO_CALIBSCALE) |			\
 		BIT(IIO_CHAN_INFO_CALIBBIAS),			\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET),	\
-	.scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits))	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (_bits),				\
+		.storagebits = 16,				\
+		.shift = 16 - (_bits),				\
+	},							\
 }
 
 #define DECLARE_AD5764_CHANNELS(_name, _bits) \
diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c
index d64acbd..ae49afe 100644
--- a/drivers/iio/dac/ad5791.c
+++ b/drivers/iio/dac/ad5791.c
@@ -91,6 +91,11 @@ struct ad5791_state {
 	unsigned			ctrl;
 	unsigned			pwr_down_mode;
 	bool				pwr_down;
+
+	union {
+		__be32 d32;
+		u8 d8[4];
+	} data[3] ____cacheline_aligned;
 };
 
 /**
@@ -104,48 +109,39 @@ enum ad5791_supported_device_ids {
 	ID_AD5791,
 };
 
-static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val)
+static int ad5791_spi_write(struct ad5791_state *st, u8 addr, u32 val)
 {
-	union {
-		u32 d32;
-		u8 d8[4];
-	} data;
-
-	data.d32 = cpu_to_be32(AD5791_CMD_WRITE |
+	st->data[0].d32 = cpu_to_be32(AD5791_CMD_WRITE |
 			      AD5791_ADDR(addr) |
 			      (val & AD5791_DAC_MASK));
 
-	return spi_write(spi, &data.d8[1], 3);
+	return spi_write(st->spi, &st->data[0].d8[1], 3);
 }
 
-static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val)
+static int ad5791_spi_read(struct ad5791_state *st, u8 addr, u32 *val)
 {
-	union {
-		u32 d32;
-		u8 d8[4];
-	} data[3];
 	int ret;
 	struct spi_transfer xfers[] = {
 		{
-			.tx_buf = &data[0].d8[1],
+			.tx_buf = &st->data[0].d8[1],
 			.bits_per_word = 8,
 			.len = 3,
 			.cs_change = 1,
 		}, {
-			.tx_buf = &data[1].d8[1],
-			.rx_buf = &data[2].d8[1],
+			.tx_buf = &st->data[1].d8[1],
+			.rx_buf = &st->data[2].d8[1],
 			.bits_per_word = 8,
 			.len = 3,
 		},
 	};
 
-	data[0].d32 = cpu_to_be32(AD5791_CMD_READ |
+	st->data[0].d32 = cpu_to_be32(AD5791_CMD_READ |
 			      AD5791_ADDR(addr));
-	data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP));
+	st->data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP));
 
-	ret = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers));
+	ret = spi_sync_transfer(st->spi, xfers, ARRAY_SIZE(xfers));
 
-	*val = be32_to_cpu(data[2].d32);
+	*val = be32_to_cpu(st->data[2].d32);
 
 	return ret;
 }
@@ -210,7 +206,7 @@ static ssize_t ad5791_write_dac_powerdown(struct iio_dev *indio_dev,
 	}
 	st->pwr_down = pwr_down;
 
-	ret = ad5791_spi_write(st->spi, AD5791_ADDR_CTRL, st->ctrl);
+	ret = ad5791_spi_write(st, AD5791_ADDR_CTRL, st->ctrl);
 
 	return ret ? ret : len;
 }
@@ -263,7 +259,7 @@ static int ad5791_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = ad5791_spi_read(st->spi, chan->address, val);
+		ret = ad5791_spi_read(st, chan->address, val);
 		if (ret)
 			return ret;
 		*val &= AD5791_DAC_MASK;
@@ -297,7 +293,7 @@ static const struct iio_chan_spec_ext_info ad5791_ext_info[] = {
 	{ },
 };
 
-#define AD5791_CHAN(bits, shift) {			\
+#define AD5791_CHAN(bits, _shift) {			\
 	.type = IIO_VOLTAGE,				\
 	.output = 1,					\
 	.indexed = 1,					\
@@ -306,7 +302,12 @@ static const struct iio_chan_spec_ext_info ad5791_ext_info[] = {
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |	\
 		BIT(IIO_CHAN_INFO_OFFSET),		\
-	.scan_type = IIO_ST('u', bits, 24, shift),	\
+	.scan_type = {					\
+		.sign = 'u',				\
+		.realbits = (bits),			\
+		.storagebits = 24,			\
+		.shift = (_shift),			\
+	},						\
 	.ext_info = ad5791_ext_info,			\
 }
 
@@ -330,7 +331,7 @@ static int ad5791_write_raw(struct iio_dev *indio_dev,
 		val &= AD5791_RES_MASK(chan->scan_type.realbits);
 		val <<= chan->scan_type.shift;
 
-		return ad5791_spi_write(st->spi, chan->address, val);
+		return ad5791_spi_write(st, chan->address, val);
 
 	default:
 		return -EINVAL;
@@ -393,7 +394,7 @@ static int ad5791_probe(struct spi_device *spi)
 		dev_warn(&spi->dev, "reference voltage unspecified\n");
 	}
 
-	ret = ad5791_spi_write(spi, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET);
+	ret = ad5791_spi_write(st, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET);
 	if (ret)
 		goto error_disable_reg_neg;
 
@@ -405,7 +406,7 @@ static int ad5791_probe(struct spi_device *spi)
 		  | ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) |
 		  AD5791_CTRL_BIN2SC;
 
-	ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl |
+	ret = ad5791_spi_write(st, AD5791_ADDR_CTRL, st->ctrl |
 		AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);
 	if (ret)
 		goto error_disable_reg_neg;
diff --git a/drivers/iio/dac/max517.c b/drivers/iio/dac/max517.c
index 6e19035..de76e6a 100644
--- a/drivers/iio/dac/max517.c
+++ b/drivers/iio/dac/max517.c
@@ -146,7 +146,6 @@ static const struct iio_info max517_info = {
 	.channel = (chan),				\
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	\
 	BIT(IIO_CHAN_INFO_SCALE),			\
-	.scan_type = IIO_ST('u', 8, 8, 0),		\
 }
 
 static const struct iio_chan_spec max517_channels[] = {
diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c
index 9f57ae8..7d9f5c3 100644
--- a/drivers/iio/dac/mcp4725.c
+++ b/drivers/iio/dac/mcp4725.c
@@ -209,7 +209,6 @@ static const struct iio_chan_spec mcp4725_channel = {
 	.channel	= 0,
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
-	.scan_type	= IIO_ST('u', 12, 16, 0),
 	.ext_info	= mcp4725_ext_info,
 };
 
diff --git a/drivers/iio/humidity/Kconfig b/drivers/iio/humidity/Kconfig
new file mode 100644
index 0000000..463c4d9
--- /dev/null
+++ b/drivers/iio/humidity/Kconfig
@@ -0,0 +1,15 @@
+#
+# humidity sensor drivers
+#
+menu "Humidity sensors"
+
+config DHT11
+	tristate "DHT11 (and compatible sensors) driver"
+	depends on GPIOLIB
+	help
+	  This driver supports reading data via a single interrupt
+	  generating GPIO line. Currently tested are DHT11 and DHT22.
+	  Other sensors should work as well as long as they speak the
+	  same protocol.
+
+endmenu
diff --git a/drivers/iio/humidity/Makefile b/drivers/iio/humidity/Makefile
new file mode 100644
index 0000000..d5d36c0
--- /dev/null
+++ b/drivers/iio/humidity/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for IIO humidity sensor drivers
+#
+
+obj-$(CONFIG_DHT11) += dht11.o
diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
new file mode 100644
index 0000000..d8771f5
--- /dev/null
+++ b/drivers/iio/humidity/dht11.c
@@ -0,0 +1,294 @@
+/*
+ * DHT11/DHT22 bit banging GPIO driver
+ *
+ * Copyright (c) Harald Geyer <harald@ccbib.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/sysfs.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/wait.h>
+#include <linux/bitops.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+
+#include <linux/iio/iio.h>
+
+#define DRIVER_NAME	"dht11"
+
+#define DHT11_DATA_VALID_TIME	2000000000  /* 2s in ns */
+
+#define DHT11_EDGES_PREAMBLE 4
+#define DHT11_BITS_PER_READ 40
+#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 */
+#define DHT11_SENSOR_RESPONSE	80000
+#define DHT11_START_BIT		50000
+#define DHT11_DATA_BIT_LOW	27000
+#define DHT11_DATA_BIT_HIGH	70000
+
+struct dht11 {
+	struct device			*dev;
+
+	int				gpio;
+	int				irq;
+
+	struct completion		completion;
+
+	s64				timestamp;
+	int				temperature;
+	int				humidity;
+
+	/* num_edges: -1 means "no transmission in progress" */
+	int				num_edges;
+	struct {s64 ts; int value; }	edges[DHT11_EDGES_PER_READ];
+};
+
+static unsigned char dht11_decode_byte(int *timing, int threshold)
+{
+	unsigned char ret = 0;
+	int i;
+
+	for (i = 0; i < 8; ++i) {
+		ret <<= 1;
+		if (timing[i] >= threshold)
+			++ret;
+	}
+
+	return ret;
+}
+
+static int dht11_decode(struct dht11 *dht11, int offset)
+{
+	int i, t, timing[DHT11_BITS_PER_READ], threshold,
+		timeres = DHT11_SENSOR_RESPONSE;
+	unsigned char temp_int, temp_dec, hum_int, hum_dec, checksum;
+
+	/* Calculate timestamp resolution */
+	for (i = 0; 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)
+		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)
+			return -EIO;  /* lost synchronisation */
+		timing[i] = t / timeres;
+	}
+
+	hum_int = dht11_decode_byte(timing, threshold);
+	hum_dec = dht11_decode_byte(&timing[8], threshold);
+	temp_int = dht11_decode_byte(&timing[16], threshold);
+	temp_dec = dht11_decode_byte(&timing[24], threshold);
+	checksum = dht11_decode_byte(&timing[32], threshold);
+
+	if (((hum_int + hum_dec + temp_int + temp_dec) & 0xff) != checksum)
+		return -EIO;
+
+	dht11->timestamp = iio_get_time_ns();
+	if (hum_int < 20) {  /* DHT22 */
+		dht11->temperature = (((temp_int & 0x7f) << 8) + temp_dec) *
+					((temp_int & 0x80) ? -100 : 100);
+		dht11->humidity = ((hum_int << 8) + hum_dec) * 100;
+	} else if (temp_dec == 0 && hum_dec == 0) {  /* DHT11 */
+		dht11->temperature = temp_int * 1000;
+		dht11->humidity = hum_int * 1000;
+	} else {
+		dev_err(dht11->dev,
+			"Don't know how to decode data: %d %d %d %d\n",
+			hum_int, hum_dec, temp_int, temp_dec);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int dht11_read_raw(struct iio_dev *iio_dev,
+			const struct iio_chan_spec *chan,
+			int *val, int *val2, long m)
+{
+	struct dht11 *dht11 = iio_priv(iio_dev);
+	int ret;
+
+	if (dht11->timestamp + DHT11_DATA_VALID_TIME < iio_get_time_ns()) {
+		reinit_completion(&dht11->completion);
+
+		dht11->num_edges = 0;
+		ret = gpio_direction_output(dht11->gpio, 0);
+		if (ret)
+			goto err;
+		msleep(DHT11_START_TRANSMISSION);
+		ret = gpio_direction_input(dht11->gpio);
+		if (ret)
+			goto err;
+
+		ret = wait_for_completion_killable_timeout(&dht11->completion,
+								 HZ);
+		if (ret == 0 && dht11->num_edges < DHT11_EDGES_PER_READ - 1) {
+			dev_err(&iio_dev->dev,
+					"Only %d signal edges detected\n",
+					dht11->num_edges);
+			ret = -ETIMEDOUT;
+		}
+		if (ret < 0)
+			goto err;
+
+		ret = dht11_decode(dht11,
+				dht11->num_edges == DHT11_EDGES_PER_READ ?
+					DHT11_EDGES_PREAMBLE :
+					DHT11_EDGES_PREAMBLE - 2);
+		if (ret)
+			goto err;
+	}
+
+	ret = IIO_VAL_INT;
+	if (chan->type == IIO_TEMP)
+		*val = dht11->temperature;
+	else if (chan->type == IIO_HUMIDITYRELATIVE)
+		*val = dht11->humidity;
+	else
+		ret = -EINVAL;
+err:
+	dht11->num_edges = -1;
+	return ret;
+}
+
+static const struct iio_info dht11_iio_info = {
+	.driver_module		= THIS_MODULE,
+	.read_raw		= dht11_read_raw,
+};
+
+/*
+ * IRQ handler called on GPIO edges
+*/
+static irqreturn_t dht11_handle_irq(int irq, void *data)
+{
+	struct iio_dev *iio = data;
+	struct dht11 *dht11 = iio_priv(iio);
+
+	/* 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++].value =
+						gpio_get_value(dht11->gpio);
+
+		if (dht11->num_edges >= DHT11_EDGES_PER_READ)
+			complete(&dht11->completion);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static const struct iio_chan_spec dht11_chan_spec[] = {
+	{ .type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), },
+	{ .type = IIO_HUMIDITYRELATIVE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), }
+};
+
+static const struct of_device_id dht11_dt_ids[] = {
+	{ .compatible = "dht11", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, dht11_dt_ids);
+
+static int dht11_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct dht11 *dht11;
+	struct iio_dev *iio;
+	int ret;
+
+	iio = devm_iio_device_alloc(dev, sizeof(*dht11));
+	if (!iio) {
+		dev_err(dev, "Failed to allocate IIO device\n");
+		return -ENOMEM;
+	}
+
+	dht11 = iio_priv(iio);
+	dht11->dev = dev;
+
+	dht11->gpio = ret = of_get_gpio(node, 0);
+	if (ret < 0)
+		return ret;
+	ret = devm_gpio_request_one(dev, dht11->gpio, GPIOF_IN, pdev->name);
+	if (ret)
+		return ret;
+
+	dht11->irq = gpio_to_irq(dht11->gpio);
+	if (dht11->irq < 0) {
+		dev_err(dev, "GPIO %d has no interrupt\n", dht11->gpio);
+		return -EINVAL;
+	}
+	ret = devm_request_irq(dev, dht11->irq, dht11_handle_irq,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				pdev->name, iio);
+	if (ret)
+		return ret;
+
+	dht11->timestamp = iio_get_time_ns() - DHT11_DATA_VALID_TIME - 1;
+	dht11->num_edges = -1;
+
+	platform_set_drvdata(pdev, iio);
+
+	init_completion(&dht11->completion);
+	iio->name = pdev->name;
+	iio->dev.parent = &pdev->dev;
+	iio->info = &dht11_iio_info;
+	iio->modes = INDIO_DIRECT_MODE;
+	iio->channels = dht11_chan_spec;
+	iio->num_channels = ARRAY_SIZE(dht11_chan_spec);
+
+	return devm_iio_device_register(dev, iio);
+}
+
+static struct platform_driver dht11_driver = {
+	.driver = {
+		.name	= DRIVER_NAME,
+		.owner	= THIS_MODULE,
+		.of_match_table = dht11_dt_ids,
+	},
+	.probe  = dht11_probe,
+};
+
+module_platform_driver(dht11_driver);
+
+MODULE_AUTHOR("Harald Geyer <harald@ccbib.org>");
+MODULE_DESCRIPTION("DHT11 humidity/temperature sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 7f9152c..c67d83b 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -37,6 +37,14 @@ static bool iio_buffer_is_active(struct iio_buffer *buf)
 	return !list_empty(&buf->buffer_list);
 }
 
+static bool iio_buffer_data_available(struct iio_buffer *buf)
+{
+	if (buf->access->data_available)
+		return buf->access->data_available(buf);
+
+	return buf->stufftoread;
+}
+
 /**
  * iio_buffer_read_first_n_outer() - chrdev read for buffer access
  *
@@ -48,13 +56,34 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
 {
 	struct iio_dev *indio_dev = filp->private_data;
 	struct iio_buffer *rb = indio_dev->buffer;
+	int ret;
 
 	if (!indio_dev->info)
 		return -ENODEV;
 
 	if (!rb || !rb->access->read_first_n)
 		return -EINVAL;
-	return rb->access->read_first_n(rb, n, buf);
+
+	do {
+		if (!iio_buffer_data_available(rb)) {
+			if (filp->f_flags & O_NONBLOCK)
+				return -EAGAIN;
+
+			ret = wait_event_interruptible(rb->pollq,
+					iio_buffer_data_available(rb) ||
+					indio_dev->info == NULL);
+			if (ret)
+				return ret;
+			if (indio_dev->info == NULL)
+				return -ENODEV;
+		}
+
+		ret = rb->access->read_first_n(rb, n, buf);
+		if (ret == 0 && (filp->f_flags & O_NONBLOCK))
+			ret = -EAGAIN;
+	 } while (ret == 0);
+
+	return ret;
 }
 
 /**
@@ -70,7 +99,7 @@ unsigned int iio_buffer_poll(struct file *filp,
 		return -ENODEV;
 
 	poll_wait(filp, &rb->pollq, wait);
-	if (rb->stufftoread)
+	if (iio_buffer_data_available(rb))
 		return POLLIN | POLLRDNORM;
 	/* need a way of knowing if there may be enough data... */
 	return 0;
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 2fe88c1..acc911a 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -69,6 +69,7 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_ALTVOLTAGE] = "altvoltage",
 	[IIO_CCT] = "cct",
 	[IIO_PRESSURE] = "pressure",
+	[IIO_HUMIDITYRELATIVE] = "humidityrelative",
 };
 
 static const char * const iio_modifier_names[] = {
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index bc043fa..c9c1419 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -242,13 +242,9 @@ static ssize_t iio_ev_state_store(struct device *dev,
 	if (ret < 0)
 		return ret;
 
-	if (indio_dev->info->write_event_config)
-		ret = indio_dev->info->write_event_config(indio_dev,
-			this_attr->address, val);
-	else
-		ret = indio_dev->info->write_event_config_new(indio_dev,
-			this_attr->c, iio_ev_attr_type(this_attr),
-			iio_ev_attr_dir(this_attr), val);
+	ret = indio_dev->info->write_event_config(indio_dev,
+		this_attr->c, iio_ev_attr_type(this_attr),
+		iio_ev_attr_dir(this_attr), val);
 
 	return (ret < 0) ? ret : len;
 }
@@ -261,13 +257,9 @@ static ssize_t iio_ev_state_show(struct device *dev,
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int val;
 
-	if (indio_dev->info->read_event_config)
-		val = indio_dev->info->read_event_config(indio_dev,
-			this_attr->address);
-	else
-		val = indio_dev->info->read_event_config_new(indio_dev,
-			this_attr->c, iio_ev_attr_type(this_attr),
-			iio_ev_attr_dir(this_attr));
+	val = indio_dev->info->read_event_config(indio_dev,
+		this_attr->c, iio_ev_attr_type(this_attr),
+		iio_ev_attr_dir(this_attr));
 	if (val < 0)
 		return val;
 	else
@@ -283,21 +275,13 @@ static ssize_t iio_ev_value_show(struct device *dev,
 	int val, val2;
 	int ret;
 
-	if (indio_dev->info->read_event_value) {
-		ret = indio_dev->info->read_event_value(indio_dev,
-			this_attr->address, &val);
-		if (ret < 0)
-			return ret;
-		return sprintf(buf, "%d\n", val);
-	} else {
-		ret = indio_dev->info->read_event_value_new(indio_dev,
-			this_attr->c, iio_ev_attr_type(this_attr),
-			iio_ev_attr_dir(this_attr), iio_ev_attr_info(this_attr),
-			&val, &val2);
-		if (ret < 0)
-			return ret;
-		return iio_format_value(buf, ret, val, val2);
-	}
+	ret = indio_dev->info->read_event_value(indio_dev,
+		this_attr->c, iio_ev_attr_type(this_attr),
+		iio_ev_attr_dir(this_attr), iio_ev_attr_info(this_attr),
+		&val, &val2);
+	if (ret < 0)
+		return ret;
+	return iio_format_value(buf, ret, val, val2);
 }
 
 static ssize_t iio_ev_value_store(struct device *dev,
@@ -310,25 +294,16 @@ static ssize_t iio_ev_value_store(struct device *dev,
 	int val, val2;
 	int ret;
 
-	if (!indio_dev->info->write_event_value &&
-		!indio_dev->info->write_event_value_new)
+	if (!indio_dev->info->write_event_value)
 		return -EINVAL;
 
-	if (indio_dev->info->write_event_value) {
-		ret = kstrtoint(buf, 10, &val);
-		if (ret)
-			return ret;
-		ret = indio_dev->info->write_event_value(indio_dev,
-			this_attr->address, val);
-	} else {
-		ret = iio_str_to_fixpoint(buf, 100000, &val, &val2);
-		if (ret)
-			return ret;
-		ret = indio_dev->info->write_event_value_new(indio_dev,
-			this_attr->c, iio_ev_attr_type(this_attr),
-			iio_ev_attr_dir(this_attr), iio_ev_attr_info(this_attr),
-			val, val2);
-	}
+	ret = iio_str_to_fixpoint(buf, 100000, &val, &val2);
+	if (ret)
+		return ret;
+	ret = indio_dev->info->write_event_value(indio_dev,
+		this_attr->c, iio_ev_attr_type(this_attr),
+		iio_ev_attr_dir(this_attr), iio_ev_attr_info(this_attr),
+		val, val2);
 	if (ret < 0)
 		return ret;
 
@@ -377,7 +352,7 @@ static int iio_device_add_event(struct iio_dev *indio_dev,
 	return attrcount;
 }
 
-static int iio_device_add_event_sysfs_new(struct iio_dev *indio_dev,
+static int iio_device_add_event_sysfs(struct iio_dev *indio_dev,
 	struct iio_chan_spec const *chan)
 {
 	int ret = 0, i, attrcount = 0;
@@ -420,89 +395,6 @@ error_ret:
 	return ret;
 }
 
-static int iio_device_add_event_sysfs_old(struct iio_dev *indio_dev,
-				      struct iio_chan_spec const *chan)
-{
-	int ret = 0, i, attrcount = 0;
-	u64 mask = 0;
-	char *postfix;
-	if (!chan->event_mask)
-		return 0;
-
-	for_each_set_bit(i, &chan->event_mask, sizeof(chan->event_mask)*8) {
-		postfix = kasprintf(GFP_KERNEL, "%s_%s_en",
-				    iio_ev_type_text[i/IIO_EV_DIR_MAX],
-				    iio_ev_dir_text[i%IIO_EV_DIR_MAX]);
-		if (postfix == NULL) {
-			ret = -ENOMEM;
-			goto error_ret;
-		}
-		if (chan->modified)
-			mask = IIO_MOD_EVENT_CODE(chan->type, 0, chan->channel2,
-						  i/IIO_EV_DIR_MAX,
-						  i%IIO_EV_DIR_MAX);
-		else if (chan->differential)
-			mask = IIO_EVENT_CODE(chan->type,
-					      0, 0,
-					      i%IIO_EV_DIR_MAX,
-					      i/IIO_EV_DIR_MAX,
-					      0,
-					      chan->channel,
-					      chan->channel2);
-		else
-			mask = IIO_UNMOD_EVENT_CODE(chan->type,
-						    chan->channel,
-						    i/IIO_EV_DIR_MAX,
-						    i%IIO_EV_DIR_MAX);
-
-		ret = __iio_add_chan_devattr(postfix,
-					     chan,
-					     &iio_ev_state_show,
-					     iio_ev_state_store,
-					     mask,
-					     0,
-					     &indio_dev->dev,
-					     &indio_dev->event_interface->
-					     dev_attr_list);
-		kfree(postfix);
-		if (ret)
-			goto error_ret;
-		attrcount++;
-		postfix = kasprintf(GFP_KERNEL, "%s_%s_value",
-				    iio_ev_type_text[i/IIO_EV_DIR_MAX],
-				    iio_ev_dir_text[i%IIO_EV_DIR_MAX]);
-		if (postfix == NULL) {
-			ret = -ENOMEM;
-			goto error_ret;
-		}
-		ret = __iio_add_chan_devattr(postfix, chan,
-					     iio_ev_value_show,
-					     iio_ev_value_store,
-					     mask,
-					     0,
-					     &indio_dev->dev,
-					     &indio_dev->event_interface->
-					     dev_attr_list);
-		kfree(postfix);
-		if (ret)
-			goto error_ret;
-		attrcount++;
-	}
-	ret = attrcount;
-error_ret:
-	return ret;
-}
-
-
-static int iio_device_add_event_sysfs(struct iio_dev *indio_dev,
-				      struct iio_chan_spec const *chan)
-{
-	if (chan->event_mask)
-		return iio_device_add_event_sysfs_old(indio_dev, chan);
-	else
-		return iio_device_add_event_sysfs_new(indio_dev, chan);
-}
-
 static inline int __iio_add_event_config_attrs(struct iio_dev *indio_dev)
 {
 	int j, ret, attrcount = 0;
@@ -523,8 +415,6 @@ static bool iio_check_for_dynamic_events(struct iio_dev *indio_dev)
 	int j;
 
 	for (j = 0; j < indio_dev->num_channels; j++) {
-		if (indio_dev->channels[j].event_mask != 0)
-			return true;
 		if (indio_dev->channels[j].num_event_specs != 0)
 			return true;
 	}
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index 7ba2f00..766fab2 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -55,15 +55,7 @@ static struct attribute *iio_trig_dev_attrs[] = {
 	&dev_attr_name.attr,
 	NULL,
 };
-
-static struct attribute_group iio_trig_attr_group = {
-	.attrs	= iio_trig_dev_attrs,
-};
-
-static const struct attribute_group *iio_trig_attr_groups[] = {
-	&iio_trig_attr_group,
-	NULL
-};
+ATTRIBUTE_GROUPS(iio_trig_dev);
 
 int iio_trigger_register(struct iio_trigger *trig_info)
 {
@@ -403,7 +395,7 @@ static void iio_trig_release(struct device *device)
 
 static struct device_type iio_trig_type = {
 	.release = iio_trig_release,
-	.groups = iio_trig_attr_groups,
+	.groups = iio_trig_dev_groups,
 };
 
 static void iio_trig_subirqmask(struct irq_data *d)
diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c
index 95c6fc8..7134e8a 100644
--- a/drivers/iio/kfifo_buf.c
+++ b/drivers/iio/kfifo_buf.c
@@ -42,7 +42,6 @@ static int iio_request_update_kfifo(struct iio_buffer *r)
 	} else {
 		kfifo_reset_out(&buf->kf);
 	}
-	r->stufftoread = false;
 	mutex_unlock(&buf->user_lock);
 
 	return ret;
@@ -108,7 +107,7 @@ static int iio_store_to_kfifo(struct iio_buffer *r,
 	ret = kfifo_in(&kf->kf, data, 1);
 	if (ret != 1)
 		return -EBUSY;
-	r->stufftoread = true;
+
 	wake_up_interruptible_poll(&r->pollq, POLLIN | POLLRDNORM);
 
 	return 0;
@@ -127,13 +126,6 @@ static int iio_read_first_n_kfifo(struct iio_buffer *r,
 		ret = -EINVAL;
 	else
 		ret = kfifo_to_user(&kf->kf, buf, n, &copied);
-
-	if (kfifo_is_empty(&kf->kf))
-		r->stufftoread = false;
-	/* verify it is still empty to avoid race */
-	if (!kfifo_is_empty(&kf->kf))
-		r->stufftoread = true;
-
 	mutex_unlock(&kf->user_lock);
 	if (ret < 0)
 		return ret;
@@ -141,6 +133,18 @@ static int iio_read_first_n_kfifo(struct iio_buffer *r,
 	return copied;
 }
 
+static bool iio_kfifo_buf_data_available(struct iio_buffer *r)
+{
+	struct iio_kfifo *kf = iio_to_kfifo(r);
+	bool empty;
+
+	mutex_lock(&kf->user_lock);
+	empty = kfifo_is_empty(&kf->kf);
+	mutex_unlock(&kf->user_lock);
+
+	return !empty;
+}
+
 static void iio_kfifo_buffer_release(struct iio_buffer *buffer)
 {
 	struct iio_kfifo *kf = iio_to_kfifo(buffer);
@@ -153,6 +157,7 @@ static void iio_kfifo_buffer_release(struct iio_buffer *buffer)
 static const struct iio_buffer_access_funcs kfifo_access_funcs = {
 	.store_to = &iio_store_to_kfifo,
 	.read_first_n = &iio_read_first_n_kfifo,
+	.data_available = iio_kfifo_buf_data_available,
 	.request_update = &iio_request_update_kfifo,
 	.get_bytes_per_datum = &iio_get_bytes_per_datum_kfifo,
 	.set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo,
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
index 83d15c5..f306847 100644
--- a/drivers/iio/light/adjd_s311.c
+++ b/drivers/iio/light/adjd_s311.c
@@ -155,7 +155,12 @@ done:
 		BIT(IIO_CHAN_INFO_INT_TIME), \
 	.channel2 = (IIO_MOD_LIGHT_##_color), \
 	.scan_index = (_scan_idx), \
-	.scan_type = IIO_ST('u', 10, 16, 0), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = 10, \
+		.storagebits = 16, \
+		.endianness = IIO_CPU, \
+	}, \
 }
 
 static const struct iio_chan_spec adjd_s311_channels[] = {
diff --git a/drivers/iio/light/apds9300.c b/drivers/iio/light/apds9300.c
index 51097bb..9ddde0c 100644
--- a/drivers/iio/light/apds9300.c
+++ b/drivers/iio/light/apds9300.c
@@ -344,10 +344,10 @@ static const struct iio_info apds9300_info_no_irq = {
 static const struct iio_info apds9300_info = {
 	.driver_module		= THIS_MODULE,
 	.read_raw		= apds9300_read_raw,
-	.read_event_value_new	= apds9300_read_thresh,
-	.write_event_value_new	= apds9300_write_thresh,
-	.read_event_config_new	= apds9300_read_interrupt_config,
-	.write_event_config_new	= apds9300_write_interrupt_config,
+	.read_event_value	= apds9300_read_thresh,
+	.write_event_value	= apds9300_write_thresh,
+	.read_event_config	= apds9300_read_interrupt_config,
+	.write_event_config	= apds9300_write_interrupt_config,
 };
 
 static const struct iio_event_spec apds9300_event_spec[] = {
diff --git a/drivers/iio/light/cm36651.c b/drivers/iio/light/cm36651.c
index 0922e39..0a142af 100644
--- a/drivers/iio/light/cm36651.c
+++ b/drivers/iio/light/cm36651.c
@@ -488,7 +488,11 @@ static int cm36651_write_raw(struct iio_dev *indio_dev,
 }
 
 static int cm36651_read_prox_thresh(struct iio_dev *indio_dev,
-					u64 event_code, int *val)
+					const struct iio_chan_spec *chan,
+					enum iio_event_type type,
+					enum iio_event_direction dir,
+					enum iio_event_info info,
+					int *val, int *val2)
 {
 	struct cm36651_data *cm36651 = iio_priv(indio_dev);
 
@@ -498,7 +502,11 @@ static int cm36651_read_prox_thresh(struct iio_dev *indio_dev,
 }
 
 static int cm36651_write_prox_thresh(struct iio_dev *indio_dev,
-					u64 event_code, int val)
+					const struct iio_chan_spec *chan,
+					enum iio_event_type type,
+					enum iio_event_direction dir,
+					enum iio_event_info info,
+					int val, int val2)
 {
 	struct cm36651_data *cm36651 = iio_priv(indio_dev);
 	struct i2c_client *client = cm36651->client;
@@ -520,7 +528,10 @@ static int cm36651_write_prox_thresh(struct iio_dev *indio_dev,
 }
 
 static int cm36651_write_prox_event_config(struct iio_dev *indio_dev,
-					u64 event_code, int state)
+					const struct iio_chan_spec *chan,
+					enum iio_event_type type,
+					enum iio_event_direction dir,
+					int state)
 {
 	struct cm36651_data *cm36651 = iio_priv(indio_dev);
 	int cmd, ret = -EINVAL;
@@ -536,7 +547,9 @@ static int cm36651_write_prox_event_config(struct iio_dev *indio_dev,
 }
 
 static int cm36651_read_prox_event_config(struct iio_dev *indio_dev,
-							u64 event_code)
+					const struct iio_chan_spec *chan,
+					enum iio_event_type type,
+					enum iio_event_direction dir)
 {
 	struct cm36651_data *cm36651 = iio_priv(indio_dev);
 	int event_en;
@@ -559,12 +572,22 @@ static int cm36651_read_prox_event_config(struct iio_dev *indio_dev,
 	.channel2 = IIO_MOD_LIGHT_##_color,		\
 }							\
 
+static const struct iio_event_spec cm36651_event_spec[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+				BIT(IIO_EV_INFO_ENABLE),
+	}
+};
+
 static const struct iio_chan_spec cm36651_channels[] = {
 	{
 		.type = IIO_PROXIMITY,
 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
 				BIT(IIO_CHAN_INFO_INT_TIME),
-		.event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER)
+		.event_spec = cm36651_event_spec,
+		.num_event_specs = ARRAY_SIZE(cm36651_event_spec),
 	},
 	CM36651_LIGHT_CHANNEL(RED, CM36651_LIGHT_CHANNEL_IDX_RED),
 	CM36651_LIGHT_CHANNEL(GREEN, CM36651_LIGHT_CHANNEL_IDX_GREEN),
@@ -693,7 +716,7 @@ static const struct of_device_id cm36651_of_match[] = {
 static struct i2c_driver cm36651_driver = {
 	.driver = {
 		.name	= "cm36651",
-		.of_match_table = of_match_ptr(cm36651_of_match),
+		.of_match_table = cm36651_of_match,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= cm36651_probe,
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c
index dc79835..5ea4a03 100644
--- a/drivers/iio/light/gp2ap020a00f.c
+++ b/drivers/iio/light/gp2ap020a00f.c
@@ -1388,10 +1388,10 @@ static const struct iio_chan_spec gp2ap020a00f_channels[] = {
 
 static const struct iio_info gp2ap020a00f_info = {
 	.read_raw = &gp2ap020a00f_read_raw,
-	.read_event_value_new = &gp2ap020a00f_read_event_val,
-	.read_event_config_new = &gp2ap020a00f_read_event_config,
-	.write_event_value_new = &gp2ap020a00f_write_event_val,
-	.write_event_config_new = &gp2ap020a00f_write_event_config,
+	.read_event_value = &gp2ap020a00f_read_event_val,
+	.read_event_config = &gp2ap020a00f_read_event_config,
+	.write_event_value = &gp2ap020a00f_write_event_val,
+	.write_event_config = &gp2ap020a00f_write_event_config,
 	.driver_module = THIS_MODULE,
 };
 
diff --git a/drivers/iio/light/tcs3472.c b/drivers/iio/light/tcs3472.c
index 45df220..887fecf 100644
--- a/drivers/iio/light/tcs3472.c
+++ b/drivers/iio/light/tcs3472.c
@@ -67,7 +67,12 @@ struct tcs3472_data {
 	.channel2 = IIO_MOD_LIGHT_##_color, \
 	.address = _addr, \
 	.scan_index = _si, \
-	.scan_type = IIO_ST('u', 16, 16, 0), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = 16, \
+		.storagebits = 16, \
+		.endianness = IIO_CPU, \
+	}, \
 }
 
 static const int tcs3472_agains[] = { 1, 4, 16, 60 };
diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
index 0c6e459..3d81101 100644
--- a/drivers/iio/light/tsl2563.c
+++ b/drivers/iio/light/tsl2563.c
@@ -702,10 +702,10 @@ static const struct iio_info tsl2563_info = {
 	.driver_module = THIS_MODULE,
 	.read_raw = &tsl2563_read_raw,
 	.write_raw = &tsl2563_write_raw,
-	.read_event_value_new = &tsl2563_read_thresh,
-	.write_event_value_new = &tsl2563_write_thresh,
-	.read_event_config_new = &tsl2563_read_interrupt_config,
-	.write_event_config_new = &tsl2563_write_interrupt_config,
+	.read_event_value = &tsl2563_read_thresh,
+	.write_event_value = &tsl2563_write_thresh,
+	.read_event_config = &tsl2563_read_interrupt_config,
+	.write_event_config = &tsl2563_write_interrupt_config,
 };
 
 static int tsl2563_probe(struct i2c_client *client,
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index 384ac23..d948c47 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -56,7 +56,7 @@ static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
 				u8 rdy_mask, u8 data_reg, int *val)
 {
 	int tries = 20;
-	u16 buf;
+	__be16 buf;
 	int ret;
 
 	ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
index becf544..4b65b6d 100644
--- a/drivers/iio/magnetometer/mag3110.c
+++ b/drivers/iio/magnetometer/mag3110.c
@@ -266,7 +266,11 @@ static const struct iio_chan_spec mag3110_channels[] = {
 		.type = IIO_TEMP,
 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 		.scan_index = 3,
-		.scan_type = IIO_ST('s', 8, 8, 0),
+		.scan_type = {
+			.sign = 's',
+			.realbits = 8,
+			.storagebits = 8,
+			},
 	},
 	IIO_CHAN_SOFT_TIMESTAMP(4),
 };
diff --git a/drivers/iio/orientation/Kconfig b/drivers/iio/orientation/Kconfig
new file mode 100644
index 0000000..58c62c8
--- /dev/null
+++ b/drivers/iio/orientation/Kconfig
@@ -0,0 +1,19 @@
+#
+# Inclinometer sensors
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Inclinometer sensors"
+
+config HID_SENSOR_INCLINOMETER_3D
+	depends on HID_SENSOR_HUB
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	select HID_SENSOR_IIO_COMMON
+	select HID_SENSOR_IIO_TRIGGER
+	tristate "HID Inclinometer 3D"
+	help
+	  Say yes here to build support for the HID SENSOR
+	  Inclinometer 3D.
+
+endmenu
diff --git a/drivers/iio/orientation/Makefile b/drivers/iio/orientation/Makefile
new file mode 100644
index 0000000..2c97572
--- /dev/null
+++ b/drivers/iio/orientation/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for industrial I/O Inclinometer sensor drivers
+#
+
+# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_HID_SENSOR_INCLINOMETER_3D) += hid-sensor-incl-3d.o
diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c
new file mode 100644
index 0000000..070feab
--- /dev/null
+++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
@@ -0,0 +1,428 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2013, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum incl_3d_channel {
+	CHANNEL_SCAN_INDEX_X,
+	CHANNEL_SCAN_INDEX_Y,
+	CHANNEL_SCAN_INDEX_Z,
+	INCLI_3D_CHANNEL_MAX,
+};
+
+struct incl_3d_state {
+	struct hid_sensor_hub_callbacks callbacks;
+	struct hid_sensor_common common_attributes;
+	struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
+	u32 incl_val[INCLI_3D_CHANNEL_MAX];
+};
+
+static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
+	HID_USAGE_SENSOR_ORIENT_TILT_X,
+	HID_USAGE_SENSOR_ORIENT_TILT_Y,
+	HID_USAGE_SENSOR_ORIENT_TILT_Z
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec incl_3d_channels[] = {
+	{
+		.type = IIO_INCLI,
+		.modified = 1,
+		.channel2 = IIO_MOD_X,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_X,
+	}, {
+		.type = IIO_INCLI,
+		.modified = 1,
+		.channel2 = IIO_MOD_Y,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Y,
+	}, {
+		.type = IIO_INCLI,
+		.modified = 1,
+		.channel2 = IIO_MOD_Z,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Z,
+	}
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan,
+						int size)
+{
+	chan->scan_type.sign = 's';
+	/* Real storage bits will change based on the report desc. */
+	chan->scan_type.realbits = size * 8;
+	/* Maximum size of a sample to capture is u32 */
+	chan->scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int incl_3d_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2,
+			      long mask)
+{
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+	int report_id = -1;
+	u32 address;
+	int ret_type;
+
+	*val = 0;
+	*val2 = 0;
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		report_id =
+			incl_state->incl[chan->scan_index].report_id;
+		address = incl_3d_addresses[chan->scan_index];
+		if (report_id >= 0)
+			*val = sensor_hub_input_attr_get_raw_value(
+				incl_state->common_attributes.hsdev,
+				HID_USAGE_SENSOR_INCLINOMETER_3D, address,
+				report_id);
+		else {
+			return -EINVAL;
+		}
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		*val = incl_state->incl[CHANNEL_SCAN_INDEX_X].units;
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = hid_sensor_convert_exponent(
+			incl_state->incl[CHANNEL_SCAN_INDEX_X].unit_expo);
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret_type = hid_sensor_read_samp_freq_value(
+			&incl_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret_type = hid_sensor_read_raw_hyst_value(
+			&incl_state->common_attributes, val, val2);
+		break;
+	default:
+		ret_type = -EINVAL;
+		break;
+	}
+
+	return ret_type;
+}
+
+/* Channel write_raw handler */
+static int incl_3d_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = hid_sensor_write_samp_freq_value(
+				&incl_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret = hid_sensor_write_raw_hyst_value(
+				&incl_state->common_attributes, val, val2);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct iio_info incl_3d_info = {
+	.driver_module = THIS_MODULE,
+	.read_raw = &incl_3d_read_raw,
+	.write_raw = &incl_3d_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
+{
+	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+	iio_push_to_buffers(indio_dev, (u8 *)data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+
+	dev_dbg(&indio_dev->dev, "incl_3d_proc_event [%d]\n",
+				incl_state->common_attributes.data_ready);
+	if (incl_state->common_attributes.data_ready)
+		hid_sensor_push_data(indio_dev,
+				(u8 *)incl_state->incl_val,
+				sizeof(incl_state->incl_val));
+
+	return 0;
+}
+
+/* Capture samples in local storage */
+static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				size_t raw_len, char *raw_data,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+	int ret = 0;
+
+	switch (usage_id) {
+	case HID_USAGE_SENSOR_ORIENT_TILT_X:
+		incl_state->incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
+	break;
+	case HID_USAGE_SENSOR_ORIENT_TILT_Y:
+		incl_state->incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
+	break;
+	case HID_USAGE_SENSOR_ORIENT_TILT_Z:
+		incl_state->incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
+	break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int incl_3d_parse_report(struct platform_device *pdev,
+				struct hid_sensor_hub_device *hsdev,
+				struct iio_chan_spec *channels,
+				unsigned usage_id,
+				struct incl_3d_state *st)
+{
+	int ret;
+
+	ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ORIENT_TILT_X,
+				&st->incl[CHANNEL_SCAN_INDEX_X]);
+	if (ret)
+		return ret;
+	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X],
+				st->incl[CHANNEL_SCAN_INDEX_X].size);
+
+	ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ORIENT_TILT_Y,
+				&st->incl[CHANNEL_SCAN_INDEX_Y]);
+	if (ret)
+		return ret;
+	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y],
+				st->incl[CHANNEL_SCAN_INDEX_Y].size);
+
+	ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ORIENT_TILT_Z,
+				&st->incl[CHANNEL_SCAN_INDEX_Z]);
+	if (ret)
+		return ret;
+	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z],
+				st->incl[CHANNEL_SCAN_INDEX_Z].size);
+
+	dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n",
+			st->incl[0].index,
+			st->incl[0].report_id,
+			st->incl[1].index, st->incl[1].report_id,
+			st->incl[2].index, st->incl[2].report_id);
+
+	/* Set Sensitivity field ids, when there is no individual modifier */
+	if (st->common_attributes.sensitivity.index < 0) {
+		sensor_hub_input_get_attribute_info(hsdev,
+			HID_FEATURE_REPORT, usage_id,
+			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+			HID_USAGE_SENSOR_DATA_ORIENTATION,
+			&st->common_attributes.sensitivity);
+		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+			st->common_attributes.sensitivity.index,
+			st->common_attributes.sensitivity.report_id);
+	}
+	return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_incl_3d_probe(struct platform_device *pdev)
+{
+	int ret;
+	static char *name = "incli_3d";
+	struct iio_dev *indio_dev;
+	struct incl_3d_state *incl_state;
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+	struct iio_chan_spec *channels;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev,
+					  sizeof(struct incl_3d_state));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, indio_dev);
+
+	incl_state = iio_priv(indio_dev);
+	incl_state->common_attributes.hsdev = hsdev;
+	incl_state->common_attributes.pdev = pdev;
+
+	ret = hid_sensor_parse_common_attributes(hsdev,
+				HID_USAGE_SENSOR_INCLINOMETER_3D,
+				&incl_state->common_attributes);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup common attributes\n");
+		return ret;
+	}
+
+	channels = kmemdup(incl_3d_channels, sizeof(incl_3d_channels),
+			   GFP_KERNEL);
+	if (!channels) {
+		dev_err(&pdev->dev, "failed to duplicate channels\n");
+		return -ENOMEM;
+	}
+
+	ret = incl_3d_parse_report(pdev, hsdev, channels,
+				HID_USAGE_SENSOR_INCLINOMETER_3D, incl_state);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup attributes\n");
+		goto error_free_dev_mem;
+	}
+
+	indio_dev->channels = channels;
+	indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels);
+	indio_dev->dev.parent = &pdev->dev;
+	indio_dev->info = &incl_3d_info;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+		NULL, NULL);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+		goto error_free_dev_mem;
+	}
+	incl_state->common_attributes.data_ready = false;
+	ret = hid_sensor_setup_trigger(indio_dev, name,
+					&incl_state->common_attributes);
+	if (ret) {
+		dev_err(&pdev->dev, "trigger setup failed\n");
+		goto error_unreg_buffer_funcs;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&pdev->dev, "device register failed\n");
+		goto error_remove_trigger;
+	}
+
+	incl_state->callbacks.send_event = incl_3d_proc_event;
+	incl_state->callbacks.capture_sample = incl_3d_capture_sample;
+	incl_state->callbacks.pdev = pdev;
+	ret = sensor_hub_register_callback(hsdev,
+					HID_USAGE_SENSOR_INCLINOMETER_3D,
+					&incl_state->callbacks);
+	if (ret) {
+		dev_err(&pdev->dev, "callback reg failed\n");
+		goto error_iio_unreg;
+	}
+
+	return 0;
+
+error_iio_unreg:
+	iio_device_unregister(indio_dev);
+error_remove_trigger:
+	hid_sensor_remove_trigger(&incl_state->common_attributes);
+error_unreg_buffer_funcs:
+	iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+	kfree(indio_dev->channels);
+	return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_incl_3d_remove(struct platform_device *pdev)
+{
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+
+	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
+	iio_device_unregister(indio_dev);
+	hid_sensor_remove_trigger(&incl_state->common_attributes);
+	iio_triggered_buffer_cleanup(indio_dev);
+	kfree(indio_dev->channels);
+
+	return 0;
+}
+
+static struct platform_device_id hid_incl_3d_ids[] = {
+	{
+		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+		.name = "HID-SENSOR-200086",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids);
+
+static struct platform_driver hid_incl_3d_platform_driver = {
+	.id_table = hid_incl_3d_ids,
+	.driver = {
+		.name	= KBUILD_MODNAME,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= hid_incl_3d_probe,
+	.remove		= hid_incl_3d_remove,
+};
+module_platform_driver(hid_incl_3d_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Inclinometer 3D");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL");