diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 6be17c2c5c65..3befcb19f414 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -254,6 +254,7 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_pressure_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_humidityrelative_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_magn_offset
+What:		/sys/bus/iio/devices/iio:deviceX/in_rot_offset
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -297,6 +298,7 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_pressure_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale
+What:		/sys/bus/iio/devices/iio:deviceX/in_illuminance_scale
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -337,6 +339,7 @@ what		/sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
 what		/sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
 What:		/sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale
 What:		/sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale
+What:		/sys/bus/iio/devices/iio:deviceX/in_illuminance_calibscale
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -348,7 +351,7 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
 What:		/sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
 What:		/sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
 What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Gender of the user (e.g.: male, female) used by some pedometers
@@ -359,7 +362,7 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
 What:		/sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
 What:		/sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
 What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Lists all available gender values (e.g.: male, female).
@@ -376,7 +379,7 @@ Description:
 		type.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_energy_calibweight
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Weight of the user (in kg). It is needed by some pedometers
@@ -797,7 +800,7 @@ Description:
 
 What:		/sys/.../events/in_accel_x_thresh_rising_period
 What:		/sys/.../events/in_accel_x_thresh_falling_period
-hat:		/sys/.../events/in_accel_x_roc_rising_period
+What:		/sys/.../events/in_accel_x_roc_rising_period
 What:		/sys/.../events/in_accel_x_roc_falling_period
 What:		/sys/.../events/in_accel_y_thresh_rising_period
 What:		/sys/.../events/in_accel_y_thresh_falling_period
@@ -944,7 +947,7 @@ Description:
 		this type.
 
 What:		/sys/.../events/in_steps_change_en
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Event generated when channel passes a threshold on the absolute
@@ -953,7 +956,7 @@ Description:
 		in_steps_change_value.
 
 What:		/sys/.../events/in_steps_change_value
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Specifies the value of change threshold that the
@@ -1128,7 +1131,7 @@ Description:
 
 What:		/sys/.../iio:deviceX/in_energy_input
 What:		/sys/.../iio:deviceX/in_energy_raw
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		This attribute is used to read the energy value reported by the
@@ -1137,7 +1140,7 @@ Description:
 
 What:		/sys/.../iio:deviceX/in_distance_input
 What:		/sys/.../iio:deviceX/in_distance_raw
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		This attribute is used to read the distance covered by the user
@@ -1167,9 +1170,13 @@ Description:
 		values should behave in the same way as a distance, i.e. lower
 		values indicate something is closer to the sensor.
 
+What:		/sys/.../iio:deviceX/in_illuminance_input
+What:		/sys/.../iio:deviceX/in_illuminance_raw
 What:		/sys/.../iio:deviceX/in_illuminanceY_input
 What:		/sys/.../iio:deviceX/in_illuminanceY_raw
 What:		/sys/.../iio:deviceX/in_illuminanceY_mean_raw
+What:		/sys/.../iio:deviceX/in_illuminance_ir_raw
+What:		/sys/.../iio:deviceX/in_illuminance_clear_raw
 KernelVersion:	3.4
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -1198,7 +1205,7 @@ Description:
 		seconds.
 
 What:		/sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Number of seconds in which to compute speed.
@@ -1260,7 +1267,7 @@ Description:
 		Units after application of scale are m/s.
 
 What:		/sys/.../iio:deviceX/in_steps_debounce_count
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Specifies the number of steps that must occur within
@@ -1268,8 +1275,92 @@ Description:
 		consumer is making steps.
 
 What:		/sys/.../iio:deviceX/in_steps_debounce_time
-KernelVersion:	3.20
+KernelVersion:	4.0
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Specifies number of seconds in which we compute the steps
 		that occur in order to decide if the consumer is making steps.
+
+What:		/sys/bus/iio/devices/iio:deviceX/buffer/watermark
+KernelVersion:	4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		A single positive integer specifying the maximum number of scan
+		elements to wait for.
+		Poll will block until the watermark is reached.
+		Blocking read will wait until the minimum between the requested
+		read amount or the low water mark is available.
+		Non-blocking read will retrieve the available samples from the
+		buffer even if there are less samples then watermark level. This
+		allows the application to block on poll with a timeout and read
+		the available samples after the timeout expires and thus have a
+		maximum delay guarantee.
+
+What:		/sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_enabled
+KernelVersion: 4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		A read-only boolean value that indicates if the hardware fifo is
+		currently enabled or disabled. If the device does not have a
+		hardware fifo this entry is not present.
+		The hardware fifo is enabled when the buffer is enabled if the
+		current hardware fifo watermark level is set and other current
+		device settings allows it (e.g. if a trigger is set that samples
+		data differently that the hardware fifo does then hardware fifo
+		will not enabled).
+		If the hardware fifo is enabled and the level of the hardware
+		fifo reaches the hardware fifo watermark level the device will
+		flush its hardware fifo to the device buffer. Doing a non
+		blocking read on the device when no samples are present in the
+		device buffer will also force a flush.
+		When the hardware fifo is enabled there is no need to use a
+		trigger to use buffer mode since the watermark settings
+		guarantees that the hardware fifo is flushed to the device
+		buffer.
+
+What:		/sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark
+KernelVersion: 4.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Read-only entry that contains a single integer specifying the
+		current watermark level for the hardware fifo. If the device
+		does not have a hardware fifo this entry is not present.
+		The watermark level for the hardware fifo is set by the driver
+		based on the value set by the user in buffer/watermark but
+		taking into account hardware limitations (e.g. most hardware
+		buffers are limited to 32-64 samples, some hardware buffers
+		watermarks are fixed or have minimum levels).  A value of 0
+		means that the hardware watermark is unset.
+
+What:		/sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_min
+KernelVersion: 4.2
+Contact:       linux-iio@vger.kernel.org
+Description:
+		A single positive integer specifying the minimum watermark level
+		for the hardware fifo of this device. If the device does not
+		have a hardware fifo this entry is not present.
+		If the user sets buffer/watermark to a value less than this one,
+		then the hardware watermark will remain unset.
+
+What:	       /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_max
+KernelVersion: 4.2
+Contact:       linux-iio@vger.kernel.org
+Description:
+		A single positive integer specifying the maximum watermark level
+		for the hardware fifo of this device. If the device does not
+		have a hardware fifo this entry is not present.
+		If the user sets buffer/watermark to a value greater than this
+		one, then the hardware watermark will be capped at this value.
+
+What:	       /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_available
+KernelVersion: 4.2
+Contact:       linux-iio@vger.kernel.org
+Description:
+		A list of positive integers specifying the available watermark
+		levels for the hardware fifo. This entry is optional and if it
+		is not present it means that all the values between
+		hwfifo_watermark_min and hwfifo_watermark_max are supported.
+		If the user sets buffer/watermark to a value greater than
+		hwfifo_watermak_min but not equal to any of the values in this
+		list, the driver will chose an appropriate value for the
+		hardware fifo watermark level.
diff --git a/Documentation/devicetree/bindings/iio/st-sensors.txt b/Documentation/devicetree/bindings/iio/st-sensors.txt
index a7a0a15913ad..d2aaca974531 100644
--- a/Documentation/devicetree/bindings/iio/st-sensors.txt
+++ b/Documentation/devicetree/bindings/iio/st-sensors.txt
@@ -23,6 +23,7 @@ standard bindings from pinctrl/pinctrl-bindings.txt.
 Valid compatible strings:
 
 Accelerometers:
+- st,lis3lv02dl-accel
 - st,lsm303dlh-accel
 - st,lsm303dlhc-accel
 - st,lis3dh-accel
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
index f1b80c4c0b35..4026122a7592 100644
--- a/drivers/iio/accel/bmc150-accel.c
+++ b/drivers/iio/accel/bmc150-accel.c
@@ -70,7 +70,9 @@
 #define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE	BIT(2)
 
 #define BMC150_ACCEL_REG_INT_MAP_1		0x1A
-#define BMC150_ACCEL_INT_MAP_1_BIT_DATA	BIT(0)
+#define BMC150_ACCEL_INT_MAP_1_BIT_DATA		BIT(0)
+#define BMC150_ACCEL_INT_MAP_1_BIT_FWM		BIT(1)
+#define BMC150_ACCEL_INT_MAP_1_BIT_FFULL	BIT(2)
 
 #define BMC150_ACCEL_REG_INT_RST_LATCH		0x21
 #define BMC150_ACCEL_INT_MODE_LATCH_RESET	0x80
@@ -83,7 +85,9 @@
 #define BMC150_ACCEL_INT_EN_BIT_SLP_Z		BIT(2)
 
 #define BMC150_ACCEL_REG_INT_EN_1		0x17
-#define BMC150_ACCEL_INT_EN_BIT_DATA_EN	BIT(4)
+#define BMC150_ACCEL_INT_EN_BIT_DATA_EN		BIT(4)
+#define BMC150_ACCEL_INT_EN_BIT_FFULL_EN	BIT(5)
+#define BMC150_ACCEL_INT_EN_BIT_FWM_EN		BIT(6)
 
 #define BMC150_ACCEL_REG_INT_OUT_CTRL		0x20
 #define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL	BIT(0)
@@ -122,6 +126,12 @@
 #define BMC150_ACCEL_AXIS_TO_REG(axis)	(BMC150_ACCEL_REG_XOUT_L + (axis * 2))
 #define BMC150_AUTO_SUSPEND_DELAY_MS		2000
 
+#define BMC150_ACCEL_REG_FIFO_STATUS		0x0E
+#define BMC150_ACCEL_REG_FIFO_CONFIG0		0x30
+#define BMC150_ACCEL_REG_FIFO_CONFIG1		0x3E
+#define BMC150_ACCEL_REG_FIFO_DATA		0x3F
+#define BMC150_ACCEL_FIFO_LENGTH		32
+
 enum bmc150_accel_axis {
 	AXIS_X,
 	AXIS_Y,
@@ -179,13 +189,14 @@ struct bmc150_accel_data {
 	atomic_t active_intr;
 	struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
 	struct mutex mutex;
+	u8 fifo_mode, watermark;
 	s16 buffer[8];
 	u8 bw_bits;
 	u32 slope_dur;
 	u32 slope_thres;
 	u32 range;
 	int ev_enable_state;
-	int64_t timestamp;
+	int64_t timestamp, old_timestamp;
 	const struct bmc150_accel_chip_info *chip_info;
 };
 
@@ -470,6 +481,12 @@ static const struct bmc150_accel_interrupt_info {
 			BMC150_ACCEL_INT_EN_BIT_SLP_Y |
 			BMC150_ACCEL_INT_EN_BIT_SLP_Z
 	},
+	{ /* fifo watermark interrupt */
+		.map_reg = BMC150_ACCEL_REG_INT_MAP_1,
+		.map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM,
+		.en_reg = BMC150_ACCEL_REG_INT_EN_1,
+		.en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN,
+	},
 };
 
 static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev,
@@ -823,6 +840,214 @@ static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
+static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int wm;
+
+	mutex_lock(&data->mutex);
+	wm = data->watermark;
+	mutex_unlock(&data->mutex);
+
+	return sprintf(buf, "%d\n", wm);
+}
+
+static ssize_t bmc150_accel_get_fifo_state(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	bool state;
+
+	mutex_lock(&data->mutex);
+	state = data->fifo_mode;
+	mutex_unlock(&data->mutex);
+
+	return sprintf(buf, "%d\n", state);
+}
+
+static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
+static IIO_CONST_ATTR(hwfifo_watermark_max,
+		      __stringify(BMC150_ACCEL_FIFO_LENGTH));
+static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO,
+		       bmc150_accel_get_fifo_state, NULL, 0);
+static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO,
+		       bmc150_accel_get_fifo_watermark, NULL, 0);
+
+static const struct attribute *bmc150_accel_fifo_attributes[] = {
+	&iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
+	&iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
+	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+	NULL,
+};
+
+static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	if (val > BMC150_ACCEL_FIFO_LENGTH)
+		val = BMC150_ACCEL_FIFO_LENGTH;
+
+	mutex_lock(&data->mutex);
+	data->watermark = val;
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+/*
+ * We must read at least one full frame in one burst, otherwise the rest of the
+ * frame data is discarded.
+ */
+static int bmc150_accel_fifo_transfer(const struct i2c_client *client,
+				      char *buffer, int samples)
+{
+	int sample_length = 3 * 2;
+	u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA;
+	int ret = -EIO;
+
+	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		struct i2c_msg msg[2] = {
+			{
+				.addr = client->addr,
+				.flags = 0,
+				.buf = &reg_fifo_data,
+				.len = sizeof(reg_fifo_data),
+			},
+			{
+				.addr = client->addr,
+				.flags = I2C_M_RD,
+				.buf = (u8 *)buffer,
+				.len = samples * sample_length,
+			}
+		};
+
+		ret = i2c_transfer(client->adapter, msg, 2);
+		if (ret != 2)
+			ret = -EIO;
+		else
+			ret = 0;
+	} else {
+		int i, step = I2C_SMBUS_BLOCK_MAX / sample_length;
+
+		for (i = 0; i < samples * sample_length; i += step) {
+			ret = i2c_smbus_read_i2c_block_data(client,
+							    reg_fifo_data, step,
+							    &buffer[i]);
+			if (ret != step) {
+				ret = -EIO;
+				break;
+			}
+
+			ret = 0;
+		}
+	}
+
+	if (ret)
+		dev_err(&client->dev, "Error transferring data from fifo\n");
+
+	return ret;
+}
+
+static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
+				     unsigned samples, bool irq)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret, i;
+	u8 count;
+	u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];
+	int64_t tstamp;
+	uint64_t sample_period;
+	ret = i2c_smbus_read_byte_data(data->client,
+				       BMC150_ACCEL_REG_FIFO_STATUS);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_fifo_status\n");
+		return ret;
+	}
+
+	count = ret & 0x7F;
+
+	if (!count)
+		return 0;
+
+	/*
+	 * If we getting called from IRQ handler we know the stored timestamp is
+	 * fairly accurate for the last stored sample. Otherwise, if we are
+	 * called as a result of a read operation from userspace and hence
+	 * before the watermark interrupt was triggered, take a timestamp
+	 * now. We can fall anywhere in between two samples so the error in this
+	 * case is at most one sample period.
+	 */
+	if (!irq) {
+		data->old_timestamp = data->timestamp;
+		data->timestamp = iio_get_time_ns();
+	}
+
+	/*
+	 * Approximate timestamps for each of the sample based on the sampling
+	 * frequency, timestamp for last sample and number of samples.
+	 *
+	 * Note that we can't use the current bandwidth settings to compute the
+	 * sample period because the sample rate varies with the device
+	 * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That
+	 * small variation adds when we store a large number of samples and
+	 * creates significant jitter between the last and first samples in
+	 * different batches (e.g. 32ms vs 21ms).
+	 *
+	 * To avoid this issue we compute the actual sample period ourselves
+	 * based on the timestamp delta between the last two flush operations.
+	 */
+	sample_period = (data->timestamp - data->old_timestamp);
+	do_div(sample_period, count);
+	tstamp = data->timestamp - (count - 1) * sample_period;
+
+	if (samples && count > samples)
+		count = samples;
+
+	ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count);
+	if (ret)
+		return ret;
+
+	/*
+	 * Ideally we want the IIO core to handle the demux when running in fifo
+	 * mode but not when running in triggered buffer mode. Unfortunately
+	 * this does not seem to be possible, so stick with driver demux for
+	 * now.
+	 */
+	for (i = 0; i < count; i++) {
+		u16 sample[8];
+		int j, bit;
+
+		j = 0;
+		for_each_set_bit(bit, indio_dev->active_scan_mask,
+				 indio_dev->masklength)
+			memcpy(&sample[j++], &buffer[i * 3 + bit], 2);
+
+		iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp);
+
+		tstamp += sample_period;
+	}
+
+	return count;
+}
+
+static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = __bmc150_accel_fifo_flush(indio_dev, samples, false);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
 		"7.810000 15.630000 31.250000 62.500000 125 250 500 1000");
 
@@ -962,6 +1187,20 @@ static const struct iio_info bmc150_accel_info = {
 	.driver_module		= THIS_MODULE,
 };
 
+static const struct iio_info bmc150_accel_info_fifo = {
+	.attrs			= &bmc150_accel_attrs_group,
+	.read_raw		= bmc150_accel_read_raw,
+	.write_raw		= bmc150_accel_write_raw,
+	.read_event_value	= bmc150_accel_read_event,
+	.write_event_value	= bmc150_accel_write_event,
+	.write_event_config	= bmc150_accel_write_event_config,
+	.read_event_config	= bmc150_accel_read_event_config,
+	.validate_trigger	= bmc150_accel_validate_trigger,
+	.hwfifo_set_watermark	= bmc150_accel_set_watermark,
+	.hwfifo_flush_to_buffer	= bmc150_accel_fifo_flush,
+	.driver_module		= THIS_MODULE,
+};
+
 static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
@@ -1057,18 +1296,17 @@ static const struct iio_trigger_ops bmc150_accel_trigger_ops = {
 	.owner = THIS_MODULE,
 };
 
-static irqreturn_t bmc150_accel_event_handler(int irq, void *private)
+static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = private;
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
-	int ret;
 	int dir;
+	int ret;
 
 	ret = i2c_smbus_read_byte_data(data->client,
 				       BMC150_ACCEL_REG_INT_STATUS_2);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error reading reg_int_status_2\n");
-		goto ack_intr_status;
+		return ret;
 	}
 
 	if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN)
@@ -1097,35 +1335,73 @@ static irqreturn_t bmc150_accel_event_handler(int irq, void *private)
 							IIO_EV_TYPE_ROC,
 							dir),
 							data->timestamp);
-ack_intr_status:
-	if (!data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY].enabled)
+	return ret;
+}
+
+static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	bool ack = false;
+	int ret;
+
+	mutex_lock(&data->mutex);
+
+	if (data->fifo_mode) {
+		ret = __bmc150_accel_fifo_flush(indio_dev,
+						BMC150_ACCEL_FIFO_LENGTH, true);
+		if (ret > 0)
+			ack = true;
+	}
+
+	if (data->ev_enable_state) {
+		ret = bmc150_accel_handle_roc_event(indio_dev);
+		if (ret > 0)
+			ack = true;
+	}
+
+	if (ack) {
 		ret = i2c_smbus_write_byte_data(data->client,
 					BMC150_ACCEL_REG_INT_RST_LATCH,
 					BMC150_ACCEL_INT_MODE_LATCH_INT |
 					BMC150_ACCEL_INT_MODE_LATCH_RESET);
+		if (ret)
+			dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
+		ret = IRQ_HANDLED;
+	} else {
+		ret = IRQ_NONE;
+	}
 
-	return IRQ_HANDLED;
+	mutex_unlock(&data->mutex);
+
+	return ret;
 }
 
-static irqreturn_t bmc150_accel_data_rdy_trig_poll(int irq, void *private)
+static irqreturn_t bmc150_accel_irq_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	bool ack = false;
 	int i;
 
+	data->old_timestamp = data->timestamp;
 	data->timestamp = iio_get_time_ns();
 
 	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
 		if (data->triggers[i].enabled) {
 			iio_trigger_poll(data->triggers[i].indio_trig);
+			ack = true;
 			break;
 		}
 	}
 
-	if (data->ev_enable_state)
+	if (data->ev_enable_state || data->fifo_mode)
 		return IRQ_WAKE_THREAD;
-	else
+
+	if (ack)
 		return IRQ_HANDLED;
+
+	return IRQ_NONE;
 }
 
 static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data)
@@ -1232,6 +1508,94 @@ static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev,
 	return ret;
 }
 
+#define BMC150_ACCEL_FIFO_MODE_STREAM          0x80
+#define BMC150_ACCEL_FIFO_MODE_FIFO            0x40
+#define BMC150_ACCEL_FIFO_MODE_BYPASS          0x00
+
+static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
+{
+	u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1;
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_fifo_config1\n");
+		return ret;
+	}
+
+	if (!data->fifo_mode)
+		return 0;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					BMC150_ACCEL_REG_FIFO_CONFIG0,
+					data->watermark);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error writing reg_fifo_config0\n");
+
+	return ret;
+}
+
+static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret = 0;
+
+	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
+		return iio_triggered_buffer_postenable(indio_dev);
+
+	mutex_lock(&data->mutex);
+
+	if (!data->watermark)
+		goto out;
+
+	ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
+					 true);
+	if (ret)
+		goto out;
+
+	data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO;
+
+	ret = bmc150_accel_fifo_set_mode(data);
+	if (ret) {
+		data->fifo_mode = 0;
+		bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
+					   false);
+	}
+
+out:
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
+		return iio_triggered_buffer_predisable(indio_dev);
+
+	mutex_lock(&data->mutex);
+
+	if (!data->fifo_mode)
+		goto out;
+
+	bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false);
+	__bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false);
+	data->fifo_mode = 0;
+	bmc150_accel_fifo_set_mode(data);
+
+out:
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
+	.postenable = bmc150_accel_buffer_postenable,
+	.predisable = bmc150_accel_buffer_predisable,
+};
+
 static int bmc150_accel_probe(struct i2c_client *client,
 			      const struct i2c_device_id *id)
 {
@@ -1278,8 +1642,8 @@ static int bmc150_accel_probe(struct i2c_client *client,
 	if (client->irq >= 0) {
 		ret = devm_request_threaded_irq(
 						&client->dev, client->irq,
-						bmc150_accel_data_rdy_trig_poll,
-						bmc150_accel_event_handler,
+						bmc150_accel_irq_handler,
+						bmc150_accel_irq_thread_handler,
 						IRQF_TRIGGER_RISING,
 						BMC150_ACCEL_IRQ_NAME,
 						indio_dev);
@@ -1309,12 +1673,20 @@ static int bmc150_accel_probe(struct i2c_client *client,
 		ret = iio_triggered_buffer_setup(indio_dev,
 						 &iio_pollfunc_store_time,
 						 bmc150_accel_trigger_handler,
-						 NULL);
+						 &bmc150_accel_buffer_ops);
 		if (ret < 0) {
 			dev_err(&client->dev,
 				"Failed: iio triggered buffer setup\n");
 			goto err_trigger_unregister;
 		}
+
+		if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
+		    i2c_check_functionality(client->adapter,
+					    I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+			indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
+			indio_dev->info = &bmc150_accel_info_fifo;
+			indio_dev->buffer->attrs = bmc150_accel_fifo_attributes;
+		}
 	}
 
 	ret = iio_device_register(indio_dev);
@@ -1386,6 +1758,7 @@ static int bmc150_accel_resume(struct device *dev)
 	mutex_lock(&data->mutex);
 	if (atomic_read(&data->active_intr))
 		bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+	bmc150_accel_fifo_set_mode(data);
 	mutex_unlock(&data->mutex);
 
 	return 0;
@@ -1417,6 +1790,9 @@ static int bmc150_accel_runtime_resume(struct device *dev)
 	dev_dbg(&data->client->dev,  __func__);
 
 	ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+	if (ret < 0)
+		return ret;
+	ret = bmc150_accel_fifo_set_mode(data);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h
index fa9646034305..7ee9724b1428 100644
--- a/drivers/iio/accel/st_accel.h
+++ b/drivers/iio/accel/st_accel.h
@@ -14,6 +14,7 @@
 #include <linux/types.h>
 #include <linux/iio/common/st_sensors.h>
 
+#define LIS3LV02DL_ACCEL_DEV_NAME	"lis3lv02dl_accel"
 #define LSM303DLHC_ACCEL_DEV_NAME	"lsm303dlhc_accel"
 #define LIS3DH_ACCEL_DEV_NAME		"lis3dh"
 #define LSM330D_ACCEL_DEV_NAME		"lsm330d_accel"
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
index 53f32629283a..58d1d13d552a 100644
--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -129,6 +129,30 @@
 #define ST_ACCEL_3_IG1_EN_MASK			0x08
 #define ST_ACCEL_3_MULTIREAD_BIT		false
 
+/* CUSTOM VALUES FOR SENSOR 4 */
+#define ST_ACCEL_4_WAI_EXP			0x3a
+#define ST_ACCEL_4_ODR_ADDR			0x20
+#define ST_ACCEL_4_ODR_MASK			0x30 /* DF1 and DF0 */
+#define ST_ACCEL_4_ODR_AVL_40HZ_VAL		0x00
+#define ST_ACCEL_4_ODR_AVL_160HZ_VAL		0x01
+#define ST_ACCEL_4_ODR_AVL_640HZ_VAL		0x02
+#define ST_ACCEL_4_ODR_AVL_2560HZ_VAL		0x03
+#define ST_ACCEL_4_PW_ADDR			0x20
+#define ST_ACCEL_4_PW_MASK			0xc0
+#define ST_ACCEL_4_FS_ADDR			0x21
+#define ST_ACCEL_4_FS_MASK			0x80
+#define ST_ACCEL_4_FS_AVL_2_VAL			0X00
+#define ST_ACCEL_4_FS_AVL_6_VAL			0X01
+#define ST_ACCEL_4_FS_AVL_2_GAIN		IIO_G_TO_M_S_2(1024)
+#define ST_ACCEL_4_FS_AVL_6_GAIN		IIO_G_TO_M_S_2(340)
+#define ST_ACCEL_4_BDU_ADDR			0x21
+#define ST_ACCEL_4_BDU_MASK			0x40
+#define ST_ACCEL_4_DRDY_IRQ_ADDR		0x21
+#define ST_ACCEL_4_DRDY_IRQ_INT1_MASK		0x04
+#define ST_ACCEL_4_IG1_EN_ADDR			0x21
+#define ST_ACCEL_4_IG1_EN_MASK			0x08
+#define ST_ACCEL_4_MULTIREAD_BIT		true
+
 static const struct iio_chan_spec st_accel_12bit_channels[] = {
 	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
 			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
@@ -373,6 +397,63 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 		.multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT,
 		.bootime = 2,
 	},
+	{
+		.wai = ST_ACCEL_4_WAI_EXP,
+		.sensors_supported = {
+			[0] = LIS3LV02DL_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = ST_ACCEL_4_ODR_ADDR,
+			.mask = ST_ACCEL_4_ODR_MASK,
+			.odr_avl = {
+				{ 40, ST_ACCEL_4_ODR_AVL_40HZ_VAL },
+				{ 160, ST_ACCEL_4_ODR_AVL_160HZ_VAL, },
+				{ 640, ST_ACCEL_4_ODR_AVL_640HZ_VAL, },
+				{ 2560, ST_ACCEL_4_ODR_AVL_2560HZ_VAL, },
+			},
+		},
+		.pw = {
+			.addr = ST_ACCEL_4_PW_ADDR,
+			.mask = ST_ACCEL_4_PW_MASK,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = ST_ACCEL_4_FS_ADDR,
+			.mask = ST_ACCEL_4_FS_MASK,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = ST_ACCEL_4_FS_AVL_2_VAL,
+					.gain = ST_ACCEL_4_FS_AVL_2_GAIN,
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_6G,
+					.value = ST_ACCEL_4_FS_AVL_6_VAL,
+					.gain = ST_ACCEL_4_FS_AVL_6_GAIN,
+				},
+			},
+		},
+		.bdu = {
+			.addr = ST_ACCEL_4_BDU_ADDR,
+			.mask = ST_ACCEL_4_BDU_MASK,
+		},
+		.drdy_irq = {
+			.addr = ST_ACCEL_4_DRDY_IRQ_ADDR,
+			.mask_int1 = ST_ACCEL_4_DRDY_IRQ_INT1_MASK,
+			.ig1 = {
+				.en_addr = ST_ACCEL_4_IG1_EN_ADDR,
+				.en_mask = ST_ACCEL_4_IG1_EN_MASK,
+			},
+		},
+		.multi_read_bit = ST_ACCEL_4_MULTIREAD_BIT,
+		.bootime = 2, /* guess */
+	},
 };
 
 static int st_accel_read_raw(struct iio_dev *indio_dev,
diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c
index c7246bdd30b9..6b720c190b2d 100644
--- a/drivers/iio/accel/st_accel_i2c.c
+++ b/drivers/iio/accel/st_accel_i2c.c
@@ -20,6 +20,10 @@
 
 #ifdef CONFIG_OF
 static const struct of_device_id st_accel_of_match[] = {
+	{
+		.compatible = "st,lis3lv02dl-accel",
+		.data = LIS3LV02DL_ACCEL_DEV_NAME,
+	},
 	{
 		.compatible = "st,lsm303dlh-accel",
 		.data = LSM303DLH_ACCEL_DEV_NAME,
diff --git a/drivers/iio/common/ssp_sensors/ssp_dev.c b/drivers/iio/common/ssp_sensors/ssp_dev.c
index 55a90082a29b..9a40097e7cf8 100644
--- a/drivers/iio/common/ssp_sensors/ssp_dev.c
+++ b/drivers/iio/common/ssp_sensors/ssp_dev.c
@@ -437,7 +437,7 @@ int ssp_queue_ssp_refresh_task(struct ssp_data *data, unsigned int delay)
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id ssp_of_match[] = {
+static const struct of_device_id ssp_of_match[] = {
 	{
 		.compatible	= "samsung,sensorhub-rinato",
 		.data		= &ssp_rinato_info,
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index 2236ea22f98a..13471a76e5bf 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -143,11 +143,16 @@ config AD7303
 	  ad7303.
 
 config MAX517
-	tristate "Maxim MAX517/518/519 DAC driver"
+	tristate "Maxim MAX517/518/519/520/521 DAC driver"
 	depends on I2C
 	help
-	  If you say yes here you get support for the Maxim chips MAX517,
-	  MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs).
+	  If you say yes here you get support for the following Maxim chips
+	  (I2C 8-Bit DACs with rail-to-rail outputs):
+	  MAX517 - Single channel, single reference
+	  MAX518 - Dual channel, ref=Vdd
+	  MAX519 - Dual channel, dual reference
+	  MAX520 - Quad channel, quad reference
+	  MAX521 - Octal channel, independent ref for ch0-3, shared ref for ch4-7
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called max517.
diff --git a/drivers/iio/dac/max517.c b/drivers/iio/dac/max517.c
index 9a82a7255ebb..5507b3970b4b 100644
--- a/drivers/iio/dac/max517.c
+++ b/drivers/iio/dac/max517.c
@@ -39,11 +39,13 @@ enum max517_device_ids {
 	ID_MAX517,
 	ID_MAX518,
 	ID_MAX519,
+	ID_MAX520,
+	ID_MAX521,
 };
 
 struct max517_data {
 	struct i2c_client	*client;
-	unsigned short		vref_mv[2];
+	unsigned short		vref_mv[8];
 };
 
 /*
@@ -149,7 +151,13 @@ static const struct iio_info max517_info = {
 
 static const struct iio_chan_spec max517_channels[] = {
 	MAX517_CHANNEL(0),
-	MAX517_CHANNEL(1)
+	MAX517_CHANNEL(1),
+	MAX517_CHANNEL(2),
+	MAX517_CHANNEL(3),
+	MAX517_CHANNEL(4),
+	MAX517_CHANNEL(5),
+	MAX517_CHANNEL(6),
+	MAX517_CHANNEL(7),
 };
 
 static int max517_probe(struct i2c_client *client,
@@ -158,6 +166,7 @@ static int max517_probe(struct i2c_client *client,
 	struct max517_data *data;
 	struct iio_dev *indio_dev;
 	struct max517_platform_data *platform_data = client->dev.platform_data;
+	int chan;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 	if (!indio_dev)
@@ -169,11 +178,21 @@ static int max517_probe(struct i2c_client *client,
 	/* establish that the iio_dev is a child of the i2c device */
 	indio_dev->dev.parent = &client->dev;
 
-	/* reduced channel set for MAX517 */
-	if (id->driver_data == ID_MAX517)
-		indio_dev->num_channels = 1;
-	else
+	switch (id->driver_data) {
+	case ID_MAX521:
+		indio_dev->num_channels = 8;
+		break;
+	case ID_MAX520:
+		indio_dev->num_channels = 4;
+		break;
+	case ID_MAX519:
+	case ID_MAX518:
 		indio_dev->num_channels = 2;
+		break;
+	default:  /* single channel for MAX517 */
+		indio_dev->num_channels = 1;
+		break;
+	}
 	indio_dev->channels = max517_channels;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &max517_info;
@@ -182,11 +201,11 @@ static int max517_probe(struct i2c_client *client,
 	 * Reference voltage on MAX518 and default is 5V, else take vref_mv
 	 * from platform_data
 	 */
-	if (id->driver_data == ID_MAX518 || !platform_data) {
-		data->vref_mv[0] = data->vref_mv[1] = 5000; /* mV */
-	} else {
-		data->vref_mv[0] = platform_data->vref_mv[0];
-		data->vref_mv[1] = platform_data->vref_mv[1];
+	for (chan = 0; chan < indio_dev->num_channels; chan++) {
+		if (id->driver_data == ID_MAX518 || !platform_data)
+			data->vref_mv[chan] = 5000; /* mV */
+		else
+			data->vref_mv[chan] = platform_data->vref_mv[chan];
 	}
 
 	return iio_device_register(indio_dev);
@@ -202,6 +221,8 @@ static const struct i2c_device_id max517_id[] = {
 	{ "max517", ID_MAX517 },
 	{ "max518", ID_MAX518 },
 	{ "max519", ID_MAX519 },
+	{ "max520", ID_MAX520 },
+	{ "max521", ID_MAX521 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, max517_id);
@@ -218,5 +239,5 @@ static struct i2c_driver max517_driver = {
 module_i2c_driver(max517_driver);
 
 MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
-MODULE_DESCRIPTION("MAX517/MAX518/MAX519 8-bit DAC");
+MODULE_DESCRIPTION("MAX517/518/519/520/521 8-bit DAC");
 MODULE_LICENSE("GPL");
diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
index f07a2336f7dc..21395f26d227 100644
--- a/drivers/iio/gyro/st_gyro_core.c
+++ b/drivers/iio/gyro/st_gyro_core.c
@@ -87,6 +87,31 @@
 #define ST_GYRO_2_DRDY_IRQ_INT2_MASK		0x08
 #define ST_GYRO_2_MULTIREAD_BIT			true
 
+/* CUSTOM VALUES FOR SENSOR 3 */
+#define ST_GYRO_3_WAI_EXP			0xd7
+#define ST_GYRO_3_ODR_ADDR			0x20
+#define ST_GYRO_3_ODR_MASK			0xc0
+#define ST_GYRO_3_ODR_AVL_95HZ_VAL		0x00
+#define ST_GYRO_3_ODR_AVL_190HZ_VAL		0x01
+#define ST_GYRO_3_ODR_AVL_380HZ_VAL		0x02
+#define ST_GYRO_3_ODR_AVL_760HZ_VAL		0x03
+#define ST_GYRO_3_PW_ADDR			0x20
+#define ST_GYRO_3_PW_MASK			0x08
+#define ST_GYRO_3_FS_ADDR			0x23
+#define ST_GYRO_3_FS_MASK			0x30
+#define ST_GYRO_3_FS_AVL_250_VAL		0x00
+#define ST_GYRO_3_FS_AVL_500_VAL		0x01
+#define ST_GYRO_3_FS_AVL_2000_VAL		0x02
+#define ST_GYRO_3_FS_AVL_250_GAIN		IIO_DEGREE_TO_RAD(8750)
+#define ST_GYRO_3_FS_AVL_500_GAIN		IIO_DEGREE_TO_RAD(17500)
+#define ST_GYRO_3_FS_AVL_2000_GAIN		IIO_DEGREE_TO_RAD(70000)
+#define ST_GYRO_3_BDU_ADDR			0x23
+#define ST_GYRO_3_BDU_MASK			0x80
+#define ST_GYRO_3_DRDY_IRQ_ADDR			0x22
+#define ST_GYRO_3_DRDY_IRQ_INT2_MASK		0x08
+#define ST_GYRO_3_MULTIREAD_BIT			true
+
+
 static const struct iio_chan_spec st_gyro_16bit_channels[] = {
 	ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
 			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
@@ -225,6 +250,64 @@ static const struct st_sensor_settings st_gyro_sensors_settings[] = {
 		.multi_read_bit = ST_GYRO_2_MULTIREAD_BIT,
 		.bootime = 2,
 	},
+	{
+		.wai = ST_GYRO_3_WAI_EXP,
+		.sensors_supported = {
+			[0] = L3GD20_GYRO_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
+		.odr = {
+			.addr = ST_GYRO_3_ODR_ADDR,
+			.mask = ST_GYRO_3_ODR_MASK,
+			.odr_avl = {
+				{ 95, ST_GYRO_3_ODR_AVL_95HZ_VAL, },
+				{ 190, ST_GYRO_3_ODR_AVL_190HZ_VAL, },
+				{ 380, ST_GYRO_3_ODR_AVL_380HZ_VAL, },
+				{ 760, ST_GYRO_3_ODR_AVL_760HZ_VAL, },
+			},
+		},
+		.pw = {
+			.addr = ST_GYRO_3_PW_ADDR,
+			.mask = ST_GYRO_3_PW_MASK,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = ST_GYRO_3_FS_ADDR,
+			.mask = ST_GYRO_3_FS_MASK,
+			.fs_avl = {
+				[0] = {
+					.num = ST_GYRO_FS_AVL_250DPS,
+					.value = ST_GYRO_3_FS_AVL_250_VAL,
+					.gain = ST_GYRO_3_FS_AVL_250_GAIN,
+				},
+				[1] = {
+					.num = ST_GYRO_FS_AVL_500DPS,
+					.value = ST_GYRO_3_FS_AVL_500_VAL,
+					.gain = ST_GYRO_3_FS_AVL_500_GAIN,
+				},
+				[2] = {
+					.num = ST_GYRO_FS_AVL_2000DPS,
+					.value = ST_GYRO_3_FS_AVL_2000_VAL,
+					.gain = ST_GYRO_3_FS_AVL_2000_GAIN,
+				},
+			},
+		},
+		.bdu = {
+			.addr = ST_GYRO_3_BDU_ADDR,
+			.mask = ST_GYRO_3_BDU_MASK,
+		},
+		.drdy_irq = {
+			.addr = ST_GYRO_3_DRDY_IRQ_ADDR,
+			.mask_int2 = ST_GYRO_3_DRDY_IRQ_INT2_MASK,
+		},
+		.multi_read_bit = ST_GYRO_3_MULTIREAD_BIT,
+		.bootime = 2,
+	},
 };
 
 static int st_gyro_read_raw(struct iio_dev *indio_dev,
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index c2d5440aa226..df919f44d513 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -37,11 +37,57 @@ 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)
+static size_t iio_buffer_data_available(struct iio_buffer *buf)
 {
 	return buf->access->data_available(buf);
 }
 
+static int iio_buffer_flush_hwfifo(struct iio_dev *indio_dev,
+				   struct iio_buffer *buf, size_t required)
+{
+	if (!indio_dev->info->hwfifo_flush_to_buffer)
+		return -ENODEV;
+
+	return indio_dev->info->hwfifo_flush_to_buffer(indio_dev, required);
+}
+
+static bool iio_buffer_ready(struct iio_dev *indio_dev, struct iio_buffer *buf,
+			     size_t to_wait, int to_flush)
+{
+	size_t avail;
+	int flushed = 0;
+
+	/* wakeup if the device was unregistered */
+	if (!indio_dev->info)
+		return true;
+
+	/* drain the buffer if it was disabled */
+	if (!iio_buffer_is_active(buf)) {
+		to_wait = min_t(size_t, to_wait, 1);
+		to_flush = 0;
+	}
+
+	avail = iio_buffer_data_available(buf);
+
+	if (avail >= to_wait) {
+		/* force a flush for non-blocking reads */
+		if (!to_wait && !avail && to_flush)
+			iio_buffer_flush_hwfifo(indio_dev, buf, to_flush);
+		return true;
+	}
+
+	if (to_flush)
+		flushed = iio_buffer_flush_hwfifo(indio_dev, buf,
+						  to_wait - avail);
+	if (flushed <= 0)
+		return false;
+
+	if (avail + flushed >= to_wait)
+		return true;
+
+	return false;
+}
+
 /**
  * iio_buffer_read_first_n_outer() - chrdev read for buffer access
  *
@@ -53,6 +99,9 @@ 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;
+	size_t datum_size;
+	size_t to_wait = 0;
+	size_t to_read;
 	int ret;
 
 	if (!indio_dev->info)
@@ -61,19 +110,28 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
 	if (!rb || !rb->access->read_first_n)
 		return -EINVAL;
 
+	datum_size = rb->bytes_per_datum;
+
+	/*
+	 * If datum_size is 0 there will never be anything to read from the
+	 * buffer, so signal end of file now.
+	 */
+	if (!datum_size)
+		return 0;
+
+	to_read = min_t(size_t, n / datum_size, rb->watermark);
+
+	if (!(filp->f_flags & O_NONBLOCK))
+		to_wait = to_read;
+
 	do {
-		if (!iio_buffer_data_available(rb)) {
-			if (filp->f_flags & O_NONBLOCK)
-				return -EAGAIN;
+		ret = wait_event_interruptible(rb->pollq,
+			iio_buffer_ready(indio_dev, rb, to_wait, to_read));
+		if (ret)
+			return ret;
 
-			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;
-		}
+		if (!indio_dev->info)
+			return -ENODEV;
 
 		ret = rb->access->read_first_n(rb, n, buf);
 		if (ret == 0 && (filp->f_flags & O_NONBLOCK))
@@ -96,9 +154,8 @@ unsigned int iio_buffer_poll(struct file *filp,
 		return -ENODEV;
 
 	poll_wait(filp, &rb->pollq, wait);
-	if (iio_buffer_data_available(rb))
+	if (iio_buffer_ready(indio_dev, rb, rb->watermark, 0))
 		return POLLIN | POLLRDNORM;
-	/* need a way of knowing if there may be enough data... */
 	return 0;
 }
 
@@ -123,6 +180,7 @@ void iio_buffer_init(struct iio_buffer *buffer)
 	INIT_LIST_HEAD(&buffer->buffer_list);
 	init_waitqueue_head(&buffer->pollq);
 	kref_init(&buffer->ref);
+	buffer->watermark = 1;
 }
 EXPORT_SYMBOL(iio_buffer_init);
 
@@ -416,6 +474,11 @@ static ssize_t iio_buffer_write_length(struct device *dev,
 		buffer->access->set_length(buffer, val);
 		ret = 0;
 	}
+	if (ret)
+		goto out;
+	if (buffer->length && buffer->length < buffer->watermark)
+		buffer->watermark = buffer->length;
+out:
 	mutex_unlock(&indio_dev->mlock);
 
 	return ret ? ret : len;
@@ -472,6 +535,7 @@ static void iio_buffer_activate(struct iio_dev *indio_dev,
 static void iio_buffer_deactivate(struct iio_buffer *buffer)
 {
 	list_del_init(&buffer->buffer_list);
+	wake_up_interruptible(&buffer->pollq);
 	iio_buffer_put(buffer);
 }
 
@@ -629,19 +693,16 @@ static int __iio_update_buffers(struct iio_dev *indio_dev,
 		}
 	}
 	/* Definitely possible for devices to support both of these. */
-	if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) {
-		if (!indio_dev->trig) {
-			printk(KERN_INFO "Buffer not started: no trigger\n");
-			ret = -EINVAL;
-			/* Can only occur on first buffer */
-			goto error_run_postdisable;
-		}
+	if ((indio_dev->modes & INDIO_BUFFER_TRIGGERED) && indio_dev->trig) {
 		indio_dev->currentmode = INDIO_BUFFER_TRIGGERED;
 	} else if (indio_dev->modes & INDIO_BUFFER_HARDWARE) {
 		indio_dev->currentmode = INDIO_BUFFER_HARDWARE;
 	} else if (indio_dev->modes & INDIO_BUFFER_SOFTWARE) {
 		indio_dev->currentmode = INDIO_BUFFER_SOFTWARE;
 	} else { /* Should never be reached */
+		/* Can only occur on first buffer */
+		if (indio_dev->modes & INDIO_BUFFER_TRIGGERED)
+			pr_info("Buffer not started: no trigger\n");
 		ret = -EINVAL;
 		goto error_run_postdisable;
 	}
@@ -754,16 +815,67 @@ static ssize_t iio_buffer_store_enable(struct device *dev,
 
 static const char * const iio_scan_elements_group_name = "scan_elements";
 
+static ssize_t iio_buffer_show_watermark(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct iio_buffer *buffer = indio_dev->buffer;
+
+	return sprintf(buf, "%u\n", buffer->watermark);
+}
+
+static ssize_t iio_buffer_store_watermark(struct device *dev,
+					  struct device_attribute *attr,
+					  const char *buf,
+					  size_t len)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct iio_buffer *buffer = indio_dev->buffer;
+	unsigned int val;
+	int ret;
+
+	ret = kstrtouint(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (!val)
+		return -EINVAL;
+
+	mutex_lock(&indio_dev->mlock);
+
+	if (val > buffer->length) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (iio_buffer_is_active(indio_dev->buffer)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	buffer->watermark = val;
+
+	if (indio_dev->info->hwfifo_set_watermark)
+		indio_dev->info->hwfifo_set_watermark(indio_dev, val);
+out:
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret ? ret : len;
+}
+
 static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length,
 		   iio_buffer_write_length);
 static struct device_attribute dev_attr_length_ro = __ATTR(length,
 	S_IRUGO, iio_buffer_read_length, NULL);
 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,
 		   iio_buffer_show_enable, iio_buffer_store_enable);
+static DEVICE_ATTR(watermark, S_IRUGO | S_IWUSR,
+		   iio_buffer_show_watermark, iio_buffer_store_watermark);
 
 static struct attribute *iio_buffer_attrs[] = {
 	&dev_attr_length.attr,
 	&dev_attr_enable.attr,
+	&dev_attr_watermark.attr,
 };
 
 int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
@@ -944,8 +1056,18 @@ static const void *iio_demux(struct iio_buffer *buffer,
 static int iio_push_to_buffer(struct iio_buffer *buffer, const void *data)
 {
 	const void *dataout = iio_demux(buffer, data);
+	int ret;
 
-	return buffer->access->store_to(buffer, dataout);
+	ret = buffer->access->store_to(buffer, dataout);
+	if (ret)
+		return ret;
+
+	/*
+	 * We can't just test for watermark to decide if we wake the poll queue
+	 * because read may request less samples than the watermark.
+	 */
+	wake_up_interruptible_poll(&buffer->pollq, POLLIN | POLLRDNORM);
+	return 0;
 }
 
 static void iio_buffer_demux_free(struct iio_buffer *buffer)
diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c
index b2beea01c49b..847ca561afe0 100644
--- a/drivers/iio/kfifo_buf.c
+++ b/drivers/iio/kfifo_buf.c
@@ -83,9 +83,6 @@ static int iio_store_to_kfifo(struct iio_buffer *r,
 	ret = kfifo_in(&kf->kf, data, 1);
 	if (ret != 1)
 		return -EBUSY;
-
-	wake_up_interruptible_poll(&r->pollq, POLLIN | POLLRDNORM);
-
 	return 0;
 }
 
@@ -109,16 +106,16 @@ static int iio_read_first_n_kfifo(struct iio_buffer *r,
 	return copied;
 }
 
-static bool iio_kfifo_buf_data_available(struct iio_buffer *r)
+static size_t iio_kfifo_buf_data_available(struct iio_buffer *r)
 {
 	struct iio_kfifo *kf = iio_to_kfifo(r);
-	bool empty;
+	size_t samples;
 
 	mutex_lock(&kf->user_lock);
-	empty = kfifo_is_empty(&kf->kf);
+	samples = kfifo_len(&kf->kf);
 	mutex_unlock(&kf->user_lock);
 
-	return !empty;
+	return samples;
 }
 
 static void iio_kfifo_buffer_release(struct iio_buffer *buffer)
diff --git a/drivers/iio/temperature/mlx90614.c b/drivers/iio/temperature/mlx90614.c
index e2c6f1a0d27f..a112fc9abf43 100644
--- a/drivers/iio/temperature/mlx90614.c
+++ b/drivers/iio/temperature/mlx90614.c
@@ -2,6 +2,7 @@
  * mlx90614.c - Support for Melexis MLX90614 contactless IR temperature sensor
  *
  * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ * Copyright (c) 2015 Essensium NV
  *
  * 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
@@ -20,11 +21,35 @@
 
 #include <linux/iio/iio.h>
 
-#define MLX90614_OP_RAM 0x00
+#define MLX90614_OP_RAM		0x00
+#define MLX90614_OP_EEPROM	0x20
+#define MLX90614_OP_SLEEP	0xff
 
 /* RAM offsets with 16-bit data, MSB first */
+#define MLX90614_RAW1	(MLX90614_OP_RAM | 0x04) /* raw data IR channel 1 */
+#define MLX90614_RAW2	(MLX90614_OP_RAM | 0x05) /* raw data IR channel 2 */
 #define MLX90614_TA	(MLX90614_OP_RAM | 0x06) /* ambient temperature */
 #define MLX90614_TOBJ1	(MLX90614_OP_RAM | 0x07) /* object 1 temperature */
+#define MLX90614_TOBJ2	(MLX90614_OP_RAM | 0x08) /* object 2 temperature */
+
+/* EEPROM offsets with 16-bit data, MSB first */
+#define MLX90614_EMISSIVITY	(MLX90614_OP_EEPROM | 0x04) /* emissivity correction coefficient */
+#define MLX90614_CONFIG		(MLX90614_OP_EEPROM | 0x05) /* configuration register */
+
+/* Control bits in configuration register */
+#define MLX90614_CONFIG_IIR_SHIFT 0 /* IIR coefficient */
+#define MLX90614_CONFIG_IIR_MASK (0x7 << MLX90614_CONFIG_IIR_SHIFT)
+#define MLX90614_CONFIG_DUAL_SHIFT 6 /* single (0) or dual (1) IR sensor */
+#define MLX90614_CONFIG_DUAL_MASK (1 << MLX90614_CONFIG_DUAL_SHIFT)
+#define MLX90614_CONFIG_FIR_SHIFT 8 /* FIR coefficient */
+#define MLX90614_CONFIG_FIR_MASK (0x7 << MLX90614_CONFIG_FIR_SHIFT)
+#define MLX90614_CONFIG_GAIN_SHIFT 11 /* gain */
+#define MLX90614_CONFIG_GAIN_MASK (0x7 << MLX90614_CONFIG_GAIN_SHIFT)
+
+/* Timings (in ms) */
+#define MLX90614_TIMING_EEPROM 20 /* time for EEPROM write/erase to complete */
+#define MLX90614_TIMING_WAKEUP 34 /* time to hold SDA low for wake-up */
+#define MLX90614_TIMING_STARTUP 250 /* time before first data after wake-up */
 
 struct mlx90614_data {
 	struct i2c_client *client;
@@ -35,26 +60,34 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
 			    int *val2, long mask)
 {
 	struct mlx90614_data *data = iio_priv(indio_dev);
+	u8 cmd;
 	s32 ret;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW: /* 0.02K / LSB */
 		switch (channel->channel2) {
 		case IIO_MOD_TEMP_AMBIENT:
-			ret = i2c_smbus_read_word_data(data->client,
-			    MLX90614_TA);
-			if (ret < 0)
-				return ret;
+			cmd = MLX90614_TA;
 			break;
 		case IIO_MOD_TEMP_OBJECT:
-			ret = i2c_smbus_read_word_data(data->client,
-			    MLX90614_TOBJ1);
-			if (ret < 0)
-				return ret;
+			switch (channel->channel) {
+			case 0:
+				cmd = MLX90614_TOBJ1;
+				break;
+			case 1:
+				cmd = MLX90614_TOBJ2;
+				break;
+			default:
+				return -EINVAL;
+			}
 			break;
 		default:
 			return -EINVAL;
 		}
+
+		ret = i2c_smbus_read_word_data(data->client, cmd);
+		if (ret < 0)
+			return ret;
 		*val = ret;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_OFFSET:
@@ -86,6 +119,16 @@ static const struct iio_chan_spec mlx90614_channels[] = {
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 		    BIT(IIO_CHAN_INFO_SCALE),
 	},
+	{
+		.type = IIO_TEMP,
+		.indexed = 1,
+		.modified = 1,
+		.channel = 1,
+		.channel2 = IIO_MOD_TEMP_OBJECT,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		    BIT(IIO_CHAN_INFO_SCALE),
+	},
 };
 
 static const struct iio_info mlx90614_info = {
@@ -93,11 +136,25 @@ static const struct iio_info mlx90614_info = {
 	.driver_module = THIS_MODULE,
 };
 
+/* Return 0 for single sensor, 1 for dual sensor, <0 on error. */
+static int mlx90614_probe_num_ir_sensors(struct i2c_client *client)
+{
+	s32 ret;
+
+	ret = i2c_smbus_read_word_data(client, MLX90614_CONFIG);
+
+	if (ret < 0)
+		return ret;
+
+	return (ret & MLX90614_CONFIG_DUAL_MASK) ? 1 : 0;
+}
+
 static int mlx90614_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
 	struct iio_dev *indio_dev;
 	struct mlx90614_data *data;
+	int ret;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
 		return -ENODEV;
@@ -115,8 +172,21 @@ static int mlx90614_probe(struct i2c_client *client,
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &mlx90614_info;
 
-	indio_dev->channels = mlx90614_channels;
-	indio_dev->num_channels = ARRAY_SIZE(mlx90614_channels);
+	ret = mlx90614_probe_num_ir_sensors(client);
+	switch (ret) {
+	case 0:
+		dev_dbg(&client->dev, "Found single sensor");
+		indio_dev->channels = mlx90614_channels;
+		indio_dev->num_channels = 2;
+		break;
+	case 1:
+		dev_dbg(&client->dev, "Found dual sensor");
+		indio_dev->channels = mlx90614_channels;
+		indio_dev->num_channels = 3;
+		break;
+	default:
+		return ret;
+	}
 
 	return iio_device_register(indio_dev);
 }
@@ -146,5 +216,6 @@ static struct i2c_driver mlx90614_driver = {
 module_i2c_driver(mlx90614_driver);
 
 MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_AUTHOR("Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>");
 MODULE_DESCRIPTION("Melexis MLX90614 contactless IR temperature sensor driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c
index f76a26885808..8589eade1057 100644
--- a/drivers/staging/iio/accel/sca3000_ring.c
+++ b/drivers/staging/iio/accel/sca3000_ring.c
@@ -129,9 +129,9 @@ static int sca3000_read_first_n_hw_rb(struct iio_buffer *r,
 	return ret ? ret : num_read;
 }
 
-static bool sca3000_ring_buf_data_available(struct iio_buffer *r)
+static size_t sca3000_ring_buf_data_available(struct iio_buffer *r)
 {
-	return r->stufftoread;
+	return r->stufftoread ? r->watermark : 0;
 }
 
 /**
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
index b65850a41127..eb8622b78ec9 100644
--- a/include/linux/iio/buffer.h
+++ b/include/linux/iio/buffer.h
@@ -21,8 +21,8 @@ struct iio_buffer;
  * struct iio_buffer_access_funcs - access functions for buffers.
  * @store_to:		actually store stuff to the buffer
  * @read_first_n:	try to get a specified number of bytes (must exist)
- * @data_available:	indicates whether data for reading from the buffer is
- *			available.
+ * @data_available:	indicates how much data is available for reading from
+ *			the buffer.
  * @request_update:	if a parameter change has been marked, update underlying
  *			storage.
  * @set_bytes_per_datum:set number of bytes per datum
@@ -43,7 +43,7 @@ struct iio_buffer_access_funcs {
 	int (*read_first_n)(struct iio_buffer *buffer,
 			    size_t n,
 			    char __user *buf);
-	bool (*data_available)(struct iio_buffer *buffer);
+	size_t (*data_available)(struct iio_buffer *buffer);
 
 	int (*request_update)(struct iio_buffer *buffer);
 
@@ -72,6 +72,7 @@ struct iio_buffer_access_funcs {
  * @demux_bounce:	[INTERN] buffer for doing gather from incoming scan.
  * @buffer_list:	[INTERN] entry in the devices list of current buffers.
  * @ref:		[INTERN] reference count of the buffer.
+ * @watermark:		[INTERN] number of datums to wait for poll/read.
  */
 struct iio_buffer {
 	int					length;
@@ -90,6 +91,7 @@ struct iio_buffer {
 	void					*demux_bounce;
 	struct list_head			buffer_list;
 	struct kref				ref;
+	unsigned int				watermark;
 };
 
 /**
diff --git a/include/linux/iio/dac/max517.h b/include/linux/iio/dac/max517.h
index f6d1d252f08d..7668716cd73c 100644
--- a/include/linux/iio/dac/max517.h
+++ b/include/linux/iio/dac/max517.h
@@ -9,7 +9,7 @@
 #define IIO_DAC_MAX517_H_
 
 struct max517_platform_data {
-	u16				vref_mv[2];
+	u16				vref_mv[8];
 };
 
 #endif /* IIO_DAC_MAX517_H_ */
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 80d855061064..d86b753e9b30 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -338,6 +338,16 @@ struct iio_dev;
  *			provide a custom of_xlate function that reads the
  *			*args* and returns the appropriate index in registered
  *			IIO channels array.
+ * @hwfifo_set_watermark: function pointer to set the current hardware
+ *			fifo watermark level; see hwfifo_* entries in
+ *			Documentation/ABI/testing/sysfs-bus-iio for details on
+ *			how the hardware fifo operates
+ * @hwfifo_flush_to_buffer: function pointer to flush the samples stored
+ *			in the hardware fifo to the device buffer. The driver
+ *			should not flush more than count samples. The function
+ *			must return the number of samples flushed, 0 if no
+ *			samples were flushed or a negative integer if no samples
+ *			were flushed and there was an error.
  **/
 struct iio_info {
 	struct module			*driver_module;
@@ -399,6 +409,9 @@ struct iio_info {
 				  unsigned *readval);
 	int (*of_xlate)(struct iio_dev *indio_dev,
 			const struct of_phandle_args *iiospec);
+	int (*hwfifo_set_watermark)(struct iio_dev *indio_dev, unsigned val);
+	int (*hwfifo_flush_to_buffer)(struct iio_dev *indio_dev,
+				      unsigned count);
 };
 
 /**
diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index 2680a2e0f113..6f6452167b67 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -20,6 +20,11 @@
 
 const char *iio_dir = "/sys/bus/iio/devices/";
 
+static char * const iio_direction[] = {
+	"in",
+	"out",
+};
+
 /**
  * iioutils_break_up_name() - extract generic name from full channel name
  * @full_name: the full channel name
@@ -30,10 +35,19 @@ int iioutils_break_up_name(const char *full_name,
 {
 	char *current;
 	char *w, *r;
-	char *working;
+	char *working, *prefix = "";
+	int i;
 
-	current = strdup(full_name);
+	for (i = 0; i < sizeof(iio_direction) / sizeof(iio_direction[0]); i++)
+		if (!strncmp(full_name, iio_direction[i],
+			     strlen(iio_direction[i]))) {
+			prefix = iio_direction[i];
+			break;
+		}
+
+	current = strdup(full_name + strlen(prefix) + 1);
 	working = strtok(current, "_\0");
+
 	w = working;
 	r = working;
 
@@ -45,7 +59,7 @@ int iioutils_break_up_name(const char *full_name,
 		r++;
 	}
 	*w = '\0';
-	*generic_name = strdup(working);
+	asprintf(generic_name, "%s_%s", prefix, working);
 	free(current);
 
 	return 0;