Merge tag 'iio-for-3.17a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First round of new drivers, cleanups and functionality for the 3.17 cycle.

New drivers
* t5403 barometric pressure sensor
* kxcjk1013 accelerometer (with a locking followup fix).
* ak09911 digital compass

Documentation
* ABI docs for proximity added (interface has been there a long time but
  somehow snuck through without being documented)
* Move iio-trig-sysfs documentation out of staging (got left behind when
  the driver moved some time ago).

Cleanups
 * drop the timestamp argument from iio_trigger_poll(_chained) as
   nothing has been done with it for some time.
 * ad799x kerneldoc for ad799x_chip brought up to date.
 * replace a number of reimplementations of the GENMASK macro and
   use the BIT macro to cleanup a few locations.
 * bring the iio_event_monitor example program up to date with new
   device types.
 * fix some incorrect function prototypes in iio_utils.h example code.
 * INDIO_RING_TRIGGERED to INDIO_BUFFER_TRIGGERED fix in docs. This
   got left behind after we renamed it a long time back.
 * fix error handling in the generic_buffer example program.
 * small tidy ups in the iio-trig-periodic-rtc driver.
 * Allow reseting iio-trig-periodic-rtc frequency to 0 (default) after
   it has changed.
 * Trivial tidy ups in coding style in iio_simply_dummy

23 files changed, 1452 insertions, 61 deletions

diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 1e120fa1e156..12addf272a61 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -77,4 +77,16 @@ config MMA8452
 	  To compile this driver as a module, choose M here: the module
 	  will be called mma8452.
 
+config KXCJK1013
+	tristate "Kionix 3-Axis Accelerometer Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say Y here if you want to build a driver for the Kionix KXCJK-1013
+	  triaxial acceleration sensor.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called kxcjk-1013.
+
 endmenu
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index dc0e379c2592..6578ca1a8e09 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -5,6 +5,7 @@
 # When adding new entries keep the list in alphabetical order
 obj-$(CONFIG_BMA180) += bma180.o
 obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
+obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
 obj-$(CONFIG_KXSD9)	+= kxsd9.o
 obj-$(CONFIG_MMA8452)	+= mma8452.o
 
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
new file mode 100644
index 000000000000..72a6dbbc18d1
--- /dev/null
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -0,0 +1,764 @@
+/*
+ * KXCJK-1013 3-axis accelerometer driver
+ * Copyright (c) 2014, 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.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/accel/kxcjk_1013.h>
+
+#define KXCJK1013_DRV_NAME "kxcjk1013"
+#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
+
+#define KXCJK1013_REG_XOUT_L		0x06
+/*
+ * From low byte X axis register, all the other addresses of Y and Z can be
+ * obtained by just applying axis offset. The following axis defines are just
+ * provide clarity, but not used.
+ */
+#define KXCJK1013_REG_XOUT_H		0x07
+#define KXCJK1013_REG_YOUT_L		0x08
+#define KXCJK1013_REG_YOUT_H		0x09
+#define KXCJK1013_REG_ZOUT_L		0x0A
+#define KXCJK1013_REG_ZOUT_H		0x0B
+
+#define KXCJK1013_REG_DCST_RESP		0x0C
+#define KXCJK1013_REG_WHO_AM_I		0x0F
+#define KXCJK1013_REG_INT_SRC1		0x16
+#define KXCJK1013_REG_INT_SRC2		0x17
+#define KXCJK1013_REG_STATUS_REG	0x18
+#define KXCJK1013_REG_INT_REL		0x1A
+#define KXCJK1013_REG_CTRL1		0x1B
+#define KXCJK1013_REG_CTRL2		0x1D
+#define KXCJK1013_REG_INT_CTRL1		0x1E
+#define KXCJK1013_REG_INT_CTRL2		0x1F
+#define KXCJK1013_REG_DATA_CTRL		0x21
+#define KXCJK1013_REG_WAKE_TIMER	0x29
+#define KXCJK1013_REG_SELF_TEST		0x3A
+#define KXCJK1013_REG_WAKE_THRES	0x6A
+
+#define KXCJK1013_REG_CTRL1_BIT_PC1	BIT(7)
+#define KXCJK1013_REG_CTRL1_BIT_RES	BIT(6)
+#define KXCJK1013_REG_CTRL1_BIT_DRDY	BIT(5)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL1	BIT(4)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL0	BIT(3)
+#define KXCJK1013_REG_CTRL1_BIT_WUFE	BIT(1)
+#define KXCJK1013_REG_INT_REG1_BIT_IEA	BIT(4)
+#define KXCJK1013_REG_INT_REG1_BIT_IEN	BIT(5)
+
+#define KXCJK1013_DATA_MASK_12_BIT	0x0FFF
+#define KXCJK1013_MAX_STARTUP_TIME_US	100000
+
+struct kxcjk1013_data {
+	struct i2c_client *client;
+	struct iio_trigger *trig;
+	bool trig_mode;
+	struct mutex mutex;
+	s16 buffer[8];
+	int power_state;
+	u8 odr_bits;
+	bool active_high_intr;
+};
+
+enum kxcjk1013_axis {
+	AXIS_X,
+	AXIS_Y,
+	AXIS_Z,
+};
+
+enum kxcjk1013_mode {
+	STANDBY,
+	OPERATION,
+};
+
+static const struct {
+	int val;
+	int val2;
+	int odr_bits;
+} samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
+			{3, 125000, 0x0A}, {6, 25000, 0x0B}, {12, 5000, 0},
+			{25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
+			{200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
+			{1600, 0, 0x07} };
+
+/* Refer to section 4 of the specification */
+static const struct {
+	int odr_bits;
+	int usec;
+} odr_start_up_times[] = { {0x08, 100000}, {0x09, 100000}, {0x0A, 100000},
+			   {0x0B, 100000}, { 0, 80000}, {0x01, 41000},
+			   {0x02, 21000}, {0x03, 11000}, {0x04, 6400},
+			   {0x05, 3900}, {0x06, 2700}, {0x07, 2100} };
+
+static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
+			      enum kxcjk1013_mode mode)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (mode == STANDBY)
+		ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
+	else
+		ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_chip_ack_intr(struct kxcjk1013_data *data)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_rel\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading who_am_i\n");
+		return ret;
+	}
+
+	dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
+
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	/* Setting range to 4G */
+	ret |= KXCJK1013_REG_CTRL1_BIT_GSEL0;
+	ret &= ~KXCJK1013_REG_CTRL1_BIT_GSEL1;
+
+	/* Set 12 bit mode */
+	ret |= KXCJK1013_REG_CTRL1_BIT_RES;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
+		return ret;
+	}
+
+	data->odr_bits = ret;
+
+	/* Set up INT polarity */
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+		return ret;
+	}
+
+	if (data->active_high_intr)
+		ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
+	else
+		ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_chip_setup_interrupt(struct kxcjk1013_data *data,
+					  bool status)
+{
+	int ret;
+
+	/* This is requirement by spec to change state to STANDBY */
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
+	else
+		ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
+	else
+		ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static int kxcjk1013_convert_freq_to_bit(int val, int val2)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
+		if (samp_freq_table[i].val == val &&
+			samp_freq_table[i].val2 == val2) {
+			return samp_freq_table[i].odr_bits;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
+{
+	int ret;
+	int odr_bits;
+
+	odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
+	if (odr_bits < 0)
+		return odr_bits;
+
+	/* To change ODR, the chip must be set to STANDBY as per spec */
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
+					odr_bits);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing data_ctrl\n");
+		return ret;
+	}
+
+	data->odr_bits = odr_bits;
+
+	/* Check, if the ODR is changed after data enable */
+	if (data->power_state) {
+		/* Set the state back to operation */
+		ret = kxcjk1013_set_mode(data, OPERATION);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
+		if (samp_freq_table[i].odr_bits == data->odr_bits) {
+			*val = samp_freq_table[i].val;
+			*val2 = samp_freq_table[i].val2;
+			return IIO_VAL_INT_PLUS_MICRO;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
+{
+	u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
+	int ret;
+
+	ret = i2c_smbus_read_word_data(data->client, reg);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"failed to read accel_%c registers\n", 'x' + axis);
+		return ret;
+	}
+
+	return ret;
+}
+
+static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(odr_start_up_times); ++i) {
+		if (odr_start_up_times[i].odr_bits == data->odr_bits)
+			return odr_start_up_times[i].usec;
+	}
+
+	return KXCJK1013_MAX_STARTUP_TIME_US;
+}
+
+static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan, int *val,
+			      int *val2, long mask)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&data->mutex);
+		if (iio_buffer_enabled(indio_dev))
+			ret = -EBUSY;
+		else {
+			int sleep_val;
+
+			ret = kxcjk1013_set_mode(data, OPERATION);
+			if (ret < 0) {
+				mutex_unlock(&data->mutex);
+				return ret;
+			}
+			++data->power_state;
+			sleep_val = kxcjk1013_get_startup_times(data);
+			if (sleep_val < 20000)
+				usleep_range(sleep_val, 20000);
+			else
+				msleep_interruptible(sleep_val/1000);
+			ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
+			if (--data->power_state == 0)
+				kxcjk1013_set_mode(data, STANDBY);
+		}
+		mutex_unlock(&data->mutex);
+
+		if (ret < 0)
+			return ret;
+
+		*val = sign_extend32(ret >> 4, 11);
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = 19163; /* range +-4g (4/2047*9.806650) */
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&data->mutex);
+		ret = kxcjk1013_get_odr(data, val, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan, int val,
+			       int val2, long mask)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&data->mutex);
+		ret = kxcjk1013_set_odr(data, val, val2);
+		mutex_unlock(&data->mutex);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,
+				      struct iio_trigger *trig)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	if (data->trig != trig)
+		return -EINVAL;
+
+	return 0;
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+	"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
+
+static struct attribute *kxcjk1013_attributes[] = {
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group kxcjk1013_attrs_group = {
+	.attrs = kxcjk1013_attributes,
+};
+
+#define KXCJK1013_CHANNEL(_axis) {					\
+	.type = IIO_ACCEL,						\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##_axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+				BIT(IIO_CHAN_INFO_SAMP_FREQ),		\
+	.scan_index = AXIS_##_axis,					\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 12,						\
+		.storagebits = 16,					\
+		.shift = 4,						\
+		.endianness = IIO_LE,					\
+	},								\
+}
+
+static const struct iio_chan_spec kxcjk1013_channels[] = {
+	KXCJK1013_CHANNEL(X),
+	KXCJK1013_CHANNEL(Y),
+	KXCJK1013_CHANNEL(Z),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_info kxcjk1013_info = {
+	.attrs			= &kxcjk1013_attrs_group,
+	.read_raw		= kxcjk1013_read_raw,
+	.write_raw		= kxcjk1013_write_raw,
+	.validate_trigger	= kxcjk1013_validate_trigger,
+	.driver_module		= THIS_MODULE,
+};
+
+static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int bit, ret, i = 0;
+
+	mutex_lock(&data->mutex);
+
+	for_each_set_bit(bit, indio_dev->buffer->scan_mask,
+			 indio_dev->masklength) {
+		ret = kxcjk1013_get_acc_reg(data, bit);
+		if (ret < 0) {
+			kxcjk1013_chip_ack_intr(data);
+			mutex_unlock(&data->mutex);
+			goto err;
+		}
+		data->buffer[i++] = ret;
+	}
+
+	kxcjk1013_chip_ack_intr(data);
+
+	mutex_unlock(&data->mutex);
+
+	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+					   pf->timestamp);
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
+						bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	mutex_lock(&data->mutex);
+	if (state) {
+		kxcjk1013_chip_setup_interrupt(data, true);
+		kxcjk1013_set_mode(data, OPERATION);
+		++data->power_state;
+	} else {
+		if (--data->power_state) {
+			mutex_unlock(&data->mutex);
+			return 0;
+		}
+		kxcjk1013_chip_setup_interrupt(data, false);
+		kxcjk1013_set_mode(data, STANDBY);
+	}
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
+	.set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
+	.owner = THIS_MODULE,
+};
+
+static int kxcjk1013_acpi_gpio_probe(struct i2c_client *client,
+				     struct kxcjk1013_data *data)
+{
+	const struct acpi_device_id *id;
+	struct device *dev;
+	struct gpio_desc *gpio;
+	int ret;
+
+	if (!client)
+		return -EINVAL;
+
+	dev = &client->dev;
+	if (!ACPI_HANDLE(dev))
+		return -ENODEV;
+
+	id = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!id)
+		return -ENODEV;
+
+	/* data ready gpio interrupt pin */
+	gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);
+	if (IS_ERR(gpio)) {
+		dev_err(dev, "acpi gpio get index failed\n");
+		return PTR_ERR(gpio);
+	}
+
+	ret = gpiod_direction_input(gpio);
+	if (ret)
+		return ret;
+
+	ret = gpiod_to_irq(gpio);
+
+	dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+
+	return ret;
+}
+
+static int kxcjk1013_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	struct kxcjk1013_data *data;
+	struct iio_dev *indio_dev;
+	struct iio_trigger *trig = NULL;
+	struct kxcjk_1013_platform_data *pdata;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+
+	pdata = dev_get_platdata(&client->dev);
+	if (pdata)
+		data->active_high_intr = pdata->active_high_intr;
+	else
+		data->active_high_intr = true; /* default polarity */
+
+	ret = kxcjk1013_chip_init(data);
+	if (ret < 0)
+		return ret;
+
+	mutex_init(&data->mutex);
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->channels = kxcjk1013_channels;
+	indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
+	indio_dev->name = KXCJK1013_DRV_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &kxcjk1013_info;
+
+	if (client->irq < 0)
+		client->irq = kxcjk1013_acpi_gpio_probe(client, data);
+
+	if (client->irq >= 0) {
+		trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
+					 indio_dev->id);
+		if (!trig)
+			return -ENOMEM;
+
+		data->trig_mode = true;
+
+		ret = devm_request_irq(&client->dev, client->irq,
+					iio_trigger_generic_data_rdy_poll,
+					IRQF_TRIGGER_RISING,
+					KXCJK1013_IRQ_NAME,
+					trig);
+		if (ret) {
+			dev_err(&client->dev, "unable to request IRQ\n");
+			goto err_trigger_free;
+		}
+
+		trig->dev.parent = &client->dev;
+		trig->ops = &kxcjk1013_trigger_ops;
+		iio_trigger_set_drvdata(trig, indio_dev);
+		data->trig = trig;
+		indio_dev->trig = trig;
+
+		ret = iio_trigger_register(trig);
+		if (ret)
+			goto err_trigger_free;
+
+		ret = iio_triggered_buffer_setup(indio_dev,
+						&iio_pollfunc_store_time,
+						kxcjk1013_trigger_handler,
+						NULL);
+		if (ret < 0) {
+			dev_err(&client->dev,
+					"iio triggered buffer setup failed\n");
+			goto err_trigger_unregister;
+		}
+	}
+
+	ret = devm_iio_device_register(&client->dev, indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "unable to register iio device\n");
+		goto err_buffer_cleanup;
+	}
+
+	return 0;
+
+err_buffer_cleanup:
+	if (data->trig_mode)
+		iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+	if (data->trig_mode)
+		iio_trigger_unregister(trig);
+err_trigger_free:
+	if (data->trig_mode)
+		iio_trigger_free(trig);
+
+	return ret;
+}
+
+static int kxcjk1013_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	if (data->trig_mode) {
+		iio_triggered_buffer_cleanup(indio_dev);
+		iio_trigger_unregister(data->trig);
+		iio_trigger_free(data->trig);
+	}
+
+	mutex_lock(&data->mutex);
+	kxcjk1013_set_mode(data, STANDBY);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int kxcjk1013_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	mutex_lock(&data->mutex);
+	kxcjk1013_set_mode(data, STANDBY);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static int kxcjk1013_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	mutex_lock(&data->mutex);
+
+	if (data->power_state)
+		kxcjk1013_set_mode(data, OPERATION);
+
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(kxcjk1013_pm_ops, kxcjk1013_suspend, kxcjk1013_resume);
+#define KXCJK1013_PM_OPS (&kxcjk1013_pm_ops)
+#else
+#define KXCJK1013_PM_OPS NULL
+#endif
+
+static const struct acpi_device_id kx_acpi_match[] = {
+	{"KXCJ1013", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
+
+static const struct i2c_device_id kxcjk1013_id[] = {
+	{"kxcjk1013", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
+
+static struct i2c_driver kxcjk1013_driver = {
+	.driver = {
+		.name	= KXCJK1013_DRV_NAME,
+		.acpi_match_table = ACPI_PTR(kx_acpi_match),
+		.pm	= KXCJK1013_PM_OPS,
+	},
+	.probe		= kxcjk1013_probe,
+	.remove		= kxcjk1013_remove,
+	.id_table	= kxcjk1013_id,
+};
+module_i2c_driver(kxcjk1013_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c
index 2a3b65c74af9..4a8c0a2f49b6 100644
--- a/drivers/iio/adc/ad7298.c
+++ b/drivers/iio/adc/ad7298.c
@@ -16,6 +16,7 @@
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/bitops.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -25,23 +26,19 @@
 
 #include <linux/platform_data/ad7298.h>
 
-#define AD7298_WRITE	(1 << 15) /* write to the control register */
-#define AD7298_REPEAT	(1 << 14) /* repeated conversion enable */
-#define AD7298_CH(x)	(1 << (13 - (x))) /* channel select */
-#define AD7298_TSENSE	(1 << 5) /* temperature conversion enable */
-#define AD7298_EXTREF	(1 << 2) /* external reference enable */
-#define AD7298_TAVG	(1 << 1) /* temperature sensor averaging enable */
-#define AD7298_PDD	(1 << 0) /* partial power down enable */
+#define AD7298_WRITE	BIT(15) /* write to the control register */
+#define AD7298_REPEAT	BIT(14) /* repeated conversion enable */
+#define AD7298_CH(x)	BIT(13 - (x)) /* channel select */
+#define AD7298_TSENSE	BIT(5) /* temperature conversion enable */
+#define AD7298_EXTREF	BIT(2) /* external reference enable */
+#define AD7298_TAVG	BIT(1) /* temperature sensor averaging enable */
+#define AD7298_PDD	BIT(0) /* partial power down enable */
 
 #define AD7298_MAX_CHAN		8
-#define AD7298_BITS		12
-#define AD7298_STORAGE_BITS	16
 #define AD7298_INTREF_mV	2500
 
 #define AD7298_CH_TEMP		9
 
-#define RES_MASK(bits)	((1 << (bits)) - 1)
-
 struct ad7298_state {
 	struct spi_device		*spi;
 	struct regulator		*reg;
@@ -257,7 +254,7 @@ static int ad7298_read_raw(struct iio_dev *indio_dev,
 			return ret;
 
 		if (chan->address != AD7298_CH_TEMP)
-			*val = ret & RES_MASK(AD7298_BITS);
+			*val = ret & GENMASK(chan->scan_type.realbits - 1, 0);
 
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index d141d452c3d1..ce400ec176f1 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -14,6 +14,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/bitops.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -21,8 +22,6 @@
 #include <linux/iio/trigger_consumer.h>
 #include <linux/iio/triggered_buffer.h>
 
-#define RES_MASK(bits)	((1 << (bits)) - 1)
-
 struct ad7476_state;
 
 struct ad7476_chip_info {
@@ -117,7 +116,7 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 		*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
-			RES_MASK(st->chip_info->channel[0].scan_type.realbits);
+			GENMASK(st->chip_info->channel[0].scan_type.realbits - 1, 0);
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		if (!st->chip_info->int_vref_uv) {
diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index 749a6cadab8b..2fd012ee99f5 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -15,6 +15,7 @@
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/bitops.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -25,14 +26,14 @@
 
 #include <linux/platform_data/ad7887.h>
 
-#define AD7887_REF_DIS		(1 << 5) /* on-chip reference disable */
-#define AD7887_DUAL		(1 << 4) /* dual-channel mode */
-#define AD7887_CH_AIN1		(1 << 3) /* convert on channel 1, DUAL=1 */
-#define AD7887_CH_AIN0		(0 << 3) /* convert on channel 0, DUAL=0,1 */
-#define AD7887_PM_MODE1		(0)	 /* CS based shutdown */
-#define AD7887_PM_MODE2		(1)	 /* full on */
-#define AD7887_PM_MODE3		(2)	 /* auto shutdown after conversion */
-#define AD7887_PM_MODE4		(3)	 /* standby mode */
+#define AD7887_REF_DIS		BIT(5)	/* on-chip reference disable */
+#define AD7887_DUAL		BIT(4)	/* dual-channel mode */
+#define AD7887_CH_AIN1		BIT(3)	/* convert on channel 1, DUAL=1 */
+#define AD7887_CH_AIN0		0	/* convert on channel 0, DUAL=0,1 */
+#define AD7887_PM_MODE1		0	/* CS based shutdown */
+#define AD7887_PM_MODE2		1	/* full on */
+#define AD7887_PM_MODE3		2	/* auto shutdown after conversion */
+#define AD7887_PM_MODE4		3	/* standby mode */
 
 enum ad7887_channels {
 	AD7887_CH0,
@@ -40,8 +41,6 @@ enum ad7887_channels {
 	AD7887_CH1,
 };
 
-#define RES_MASK(bits)	((1 << (bits)) - 1)
-
 /**
  * struct ad7887_chip_info - chip specifc information
  * @int_vref_mv:	the internal reference voltage
@@ -167,7 +166,7 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 		*val = ret >> chan->scan_type.shift;
-		*val &= RES_MASK(chan->scan_type.realbits);
+		*val &= GENMASK(chan->scan_type.realbits - 1, 0);
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		if (st->reg) {
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index 39b4cb48d738..7e08c601f66e 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -105,9 +105,8 @@ enum {
  * struct ad799x_chip_info - chip specific information
  * @channel:		channel specification
  * @num_channels:	number of channels
- * @monitor_mode:	whether the chip supports monitor interrupts
  * @default_config:	device default configuration
- * @event_attrs:	pointer to the monitor event attribute group
+ * @info:		pointer to iio_info struct
  */
 struct ad799x_chip_info {
 	struct iio_chan_spec		channel[9];
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index 9a4e0e32a771..c55b81f7f970 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -410,7 +410,7 @@ static irqreturn_t ad_sd_data_rdy_trig_poll(int irq, void *private)
 	complete(&sigma_delta->completion);
 	disable_irq_nosync(irq);
 	sigma_delta->irq_dis = true;
-	iio_trigger_poll(sigma_delta->trig, iio_get_time_ns());
+	iio_trigger_poll(sigma_delta->trig);
 
 	return IRQ_HANDLED;
 }
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 3b5bacd4d8da..8a5e67c4ced1 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -272,7 +272,7 @@ void handle_adc_eoc_trigger(int irq, struct iio_dev *idev)
 
 	if (iio_buffer_enabled(idev)) {
 		disable_irq_nosync(irq);
-		iio_trigger_poll(idev->trig, iio_get_time_ns());
+		iio_trigger_poll(idev->trig);
 	} else {
 		st->last_value = at91_adc_readl(st, AT91_ADC_LCDR);
 		st->done = true;
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index ab52be29141b..fd2745c62943 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -486,7 +486,7 @@ static irqreturn_t xadc_axi_interrupt_handler(int irq, void *devid)
 		return IRQ_NONE;
 
 	if ((status & XADC_AXI_INT_EOS) && xadc->trigger)
-		iio_trigger_poll(xadc->trigger, 0);
+		iio_trigger_poll(xadc->trigger);
 
 	if (status & XADC_AXI_INT_ALARM_MASK) {
 		/*
diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c
index 1e6449346b50..c917dd24090a 100644
--- a/drivers/iio/dac/ad5504.c
+++ b/drivers/iio/dac/ad5504.c
@@ -15,17 +15,16 @@
 #include <linux/sysfs.h>
 #include <linux/regulator/consumer.h>
 #include <linux/module.h>
+#include <linux/bitops.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/iio/events.h>
 #include <linux/iio/dac/ad5504.h>
 
-#define AD5505_BITS			12
-#define AD5504_RES_MASK			((1 << (AD5505_BITS)) - 1)
-
-#define AD5504_CMD_READ			(1 << 15)
-#define AD5504_CMD_WRITE		(0 << 15)
+#define AD5504_RES_MASK			GENMASK(11, 0)
+#define AD5504_CMD_READ			BIT(15)
+#define AD5504_CMD_WRITE		0
 #define AD5504_ADDR(addr)		((addr) << 12)
 
 /* Registers */
@@ -42,7 +41,7 @@
 
 /**
  * struct ad5446_state - driver instance specific data
- * @us:			spi_device
+ * @spi:			spi_device
  * @reg:		supply regulator
  * @vref_mv:		actual reference voltage used
  * @pwr_down_mask	power down mask
diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c
index ae49afe2b380..5ba785f18589 100644
--- a/drivers/iio/dac/ad5791.c
+++ b/drivers/iio/dac/ad5791.c
@@ -16,17 +16,16 @@
 #include <linux/sysfs.h>
 #include <linux/regulator/consumer.h>
 #include <linux/module.h>
+#include <linux/bitops.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/iio/dac/ad5791.h>
 
-#define AD5791_RES_MASK(x)		((1 << (x)) - 1)
-#define AD5791_DAC_MASK			AD5791_RES_MASK(20)
-#define AD5791_DAC_MSB			(1 << 19)
+#define AD5791_DAC_MASK			GENMASK(19, 0)
 
-#define AD5791_CMD_READ			(1 << 23)
-#define AD5791_CMD_WRITE		(0 << 23)
+#define AD5791_CMD_READ			BIT(23)
+#define AD5791_CMD_WRITE		0
 #define AD5791_ADDR(addr)		((addr) << 20)
 
 /* Registers */
@@ -37,11 +36,11 @@
 #define AD5791_ADDR_SW_CTRL		4
 
 /* Control Register */
-#define AD5791_CTRL_RBUF		(1 << 1)
-#define AD5791_CTRL_OPGND		(1 << 2)
-#define AD5791_CTRL_DACTRI		(1 << 3)
-#define AD5791_CTRL_BIN2SC		(1 << 4)
-#define AD5791_CTRL_SDODIS		(1 << 5)
+#define AD5791_CTRL_RBUF		BIT(1)
+#define AD5791_CTRL_OPGND		BIT(2)
+#define AD5791_CTRL_DACTRI		BIT(3)
+#define AD5791_CTRL_BIN2SC		BIT(4)
+#define AD5791_CTRL_SDODIS		BIT(5)
 #define AD5761_CTRL_LINCOMP(x)		((x) << 6)
 
 #define AD5791_LINCOMP_0_10		0
@@ -54,9 +53,9 @@
 #define AD5780_LINCOMP_10_20		12
 
 /* Software Control Register */
-#define AD5791_SWCTRL_LDAC		(1 << 0)
-#define AD5791_SWCTRL_CLR		(1 << 1)
-#define AD5791_SWCTRL_RESET		(1 << 2)
+#define AD5791_SWCTRL_LDAC		BIT(0)
+#define AD5791_SWCTRL_CLR		BIT(1)
+#define AD5791_SWCTRL_RESET		BIT(2)
 
 #define AD5791_DAC_PWRDN_6K		0
 #define AD5791_DAC_PWRDN_3STATE		1
@@ -72,7 +71,7 @@ struct ad5791_chip_info {
 
 /**
  * struct ad5791_state - driver instance specific data
- * @us:			spi_device
+ * @spi:			spi_device
  * @reg_vdd:		positive supply regulator
  * @reg_vss:		negative supply regulator
  * @chip_info:		chip model specific constants
@@ -328,7 +327,7 @@ static int ad5791_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		val &= AD5791_RES_MASK(chan->scan_type.realbits);
+		val &= GENMASK(chan->scan_type.realbits - 1, 0);
 		val <<= chan->scan_type.shift;
 
 		return ad5791_spi_write(st, chan->address, val);
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index 3383b025f62e..d31098e0c43f 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -114,7 +114,7 @@ static struct iio_trigger *iio_trigger_find_by_name(const char *name,
 	return trig;
 }
 
-void iio_trigger_poll(struct iio_trigger *trig, s64 time)
+void iio_trigger_poll(struct iio_trigger *trig)
 {
 	int i;
 
@@ -133,12 +133,12 @@ EXPORT_SYMBOL(iio_trigger_poll);
 
 irqreturn_t iio_trigger_generic_data_rdy_poll(int irq, void *private)
 {
-	iio_trigger_poll(private, iio_get_time_ns());
+	iio_trigger_poll(private);
 	return IRQ_HANDLED;
 }
 EXPORT_SYMBOL(iio_trigger_generic_data_rdy_poll);
 
-void iio_trigger_poll_chained(struct iio_trigger *trig, s64 time)
+void iio_trigger_poll_chained(struct iio_trigger *trig)
 {
 	int i;
 
@@ -161,7 +161,7 @@ void iio_trigger_notify_done(struct iio_trigger *trig)
 		trig->ops->try_reenable)
 		if (trig->ops->try_reenable(trig))
 			/* Missed an interrupt so launch new poll now */
-			iio_trigger_poll(trig, 0);
+			iio_trigger_poll(trig);
 }
 EXPORT_SYMBOL(iio_trigger_notify_done);
 
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c
index 04bdb85d2d9f..221ed16de1f7 100644
--- a/drivers/iio/light/gp2ap020a00f.c
+++ b/drivers/iio/light/gp2ap020a00f.c
@@ -827,7 +827,7 @@ static void gp2ap020a00f_iio_trigger_work(struct irq_work *work)
 	struct gp2ap020a00f_data *data =
 		container_of(work, struct gp2ap020a00f_data, work);
 
-	iio_trigger_poll(data->trig, 0);
+	iio_trigger_poll(data->trig);
 }
 
 static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data)
diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
index 05a364c543f8..b2dba9e506ab 100644
--- a/drivers/iio/magnetometer/Kconfig
+++ b/drivers/iio/magnetometer/Kconfig
@@ -17,6 +17,16 @@ config AK8975
 	  To compile this driver as a module, choose M here: the module
 	  will be called ak8975.
 
+config AK09911
+	tristate "Asahi Kasei AK09911 3-axis Compass"
+	depends on I2C
+	help
+	  Say yes here to build support for Asahi Kasei AK09911 3-Axis
+	  Magnetometer.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called ak09911.
+
 config MAG3110
 	tristate "Freescale MAG3110 3-Axis Magnetometer"
 	depends on I2C
diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile
index 0f5d3c985799..b91315e0b826 100644
--- a/drivers/iio/magnetometer/Makefile
+++ b/drivers/iio/magnetometer/Makefile
@@ -3,6 +3,7 @@
 #
 
 # When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_AK09911)	+= ak09911.o
 obj-$(CONFIG_AK8975)	+= ak8975.o
 obj-$(CONFIG_MAG3110)	+= mag3110.o
 obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o
diff --git a/drivers/iio/magnetometer/ak09911.c b/drivers/iio/magnetometer/ak09911.c
new file mode 100644
index 000000000000..b2bc942ff6b8
--- /dev/null
+++ b/drivers/iio/magnetometer/ak09911.c
@@ -0,0 +1,326 @@
+/*
+ * AK09911 3-axis compass driver
+ * Copyright (c) 2014, 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/iio/iio.h>
+
+#define AK09911_REG_WIA1		0x00
+#define AK09911_REG_WIA2		0x01
+#define AK09911_WIA1_VALUE		0x48
+#define AK09911_WIA2_VALUE		0x05
+
+#define AK09911_REG_ST1			0x10
+#define AK09911_REG_HXL			0x11
+#define AK09911_REG_HXH			0x12
+#define AK09911_REG_HYL			0x13
+#define AK09911_REG_HYH			0x14
+#define AK09911_REG_HZL			0x15
+#define AK09911_REG_HZH			0x16
+
+#define AK09911_REG_ASAX		0x60
+#define AK09911_REG_ASAY		0x61
+#define AK09911_REG_ASAZ		0x62
+
+#define AK09911_REG_CNTL1		0x30
+#define AK09911_REG_CNTL2		0x31
+#define AK09911_REG_CNTL3		0x32
+
+#define AK09911_MODE_SNG_MEASURE	0x01
+#define AK09911_MODE_SELF_TEST		0x10
+#define AK09911_MODE_FUSE_ACCESS	0x1F
+#define AK09911_MODE_POWERDOWN		0x00
+#define AK09911_RESET_DATA		0x01
+
+#define AK09911_REG_CNTL1		0x30
+#define AK09911_REG_CNTL2		0x31
+#define AK09911_REG_CNTL3		0x32
+
+#define AK09911_RAW_TO_GAUSS(asa)	((((asa) + 128) * 6000) / 256)
+
+#define AK09911_MAX_CONVERSION_TIMEOUT_MS	500
+#define AK09911_CONVERSION_DONE_POLL_TIME_MS	10
+
+struct ak09911_data {
+	struct i2c_client	*client;
+	struct mutex		lock;
+	u8			asa[3];
+	long			raw_to_gauss[3];
+};
+
+static const int ak09911_index_to_reg[] = {
+	AK09911_REG_HXL, AK09911_REG_HYL, AK09911_REG_HZL,
+};
+
+static int ak09911_set_mode(struct i2c_client *client, u8 mode)
+{
+	int ret;
+
+	switch (mode) {
+	case AK09911_MODE_SNG_MEASURE:
+	case AK09911_MODE_SELF_TEST:
+	case AK09911_MODE_FUSE_ACCESS:
+	case AK09911_MODE_POWERDOWN:
+		ret = i2c_smbus_write_byte_data(client,
+						AK09911_REG_CNTL2, mode);
+		if (ret < 0) {
+			dev_err(&client->dev, "set_mode error\n");
+			return ret;
+		}
+		/* After mode change wait atleast 100us */
+		usleep_range(100, 500);
+		break;
+	default:
+		dev_err(&client->dev,
+			"%s: Unknown mode(%d).", __func__, mode);
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+/* Get Sensitivity Adjustment value */
+static int ak09911_get_asa(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct ak09911_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = ak09911_set_mode(client, AK09911_MODE_FUSE_ACCESS);
+	if (ret < 0)
+		return ret;
+
+	/* Get asa data and store in the device data. */
+	ret = i2c_smbus_read_i2c_block_data(client, AK09911_REG_ASAX,
+					    3, data->asa);
+	if (ret < 0) {
+		dev_err(&client->dev, "Not able to read asa data\n");
+		return ret;
+	}
+
+	ret = ak09911_set_mode(client,  AK09911_MODE_POWERDOWN);
+	if (ret < 0)
+		return ret;
+
+	data->raw_to_gauss[0] = AK09911_RAW_TO_GAUSS(data->asa[0]);
+	data->raw_to_gauss[1] = AK09911_RAW_TO_GAUSS(data->asa[1]);
+	data->raw_to_gauss[2] = AK09911_RAW_TO_GAUSS(data->asa[2]);
+
+	return 0;
+}
+
+static int ak09911_verify_chip_id(struct i2c_client *client)
+{
+	u8 wia_val[2];
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(client, AK09911_REG_WIA1,
+					    2, wia_val);
+	if (ret < 0) {
+		dev_err(&client->dev, "Error reading WIA\n");
+		return ret;
+	}
+
+	dev_dbg(&client->dev, "WIA %02x %02x\n", wia_val[0], wia_val[1]);
+
+	if (wia_val[0] != AK09911_WIA1_VALUE ||
+		wia_val[1] != AK09911_WIA2_VALUE) {
+		dev_err(&client->dev, "Device ak09911 not found\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int wait_conversion_complete_polled(struct ak09911_data *data)
+{
+	struct i2c_client *client = data->client;
+	u8 read_status;
+	u32 timeout_ms = AK09911_MAX_CONVERSION_TIMEOUT_MS;
+	int ret;
+
+	/* Wait for the conversion to complete. */
+	while (timeout_ms) {
+		msleep_interruptible(AK09911_CONVERSION_DONE_POLL_TIME_MS);
+		ret = i2c_smbus_read_byte_data(client, AK09911_REG_ST1);
+		if (ret < 0) {
+			dev_err(&client->dev, "Error in reading ST1\n");
+			return ret;
+		}
+		read_status = ret & 0x01;
+		if (read_status)
+			break;
+		timeout_ms -= AK09911_CONVERSION_DONE_POLL_TIME_MS;
+	}
+	if (!timeout_ms) {
+		dev_err(&client->dev, "Conversion timeout happened\n");
+		return -EIO;
+	}
+
+	return read_status;
+}
+
+static int ak09911_read_axis(struct iio_dev *indio_dev, int index, int *val)
+{
+	struct ak09911_data *data = iio_priv(indio_dev);
+	struct i2c_client *client = data->client;
+	int ret;
+
+	mutex_lock(&data->lock);
+
+	ret = ak09911_set_mode(client, AK09911_MODE_SNG_MEASURE);
+	if (ret < 0)
+		goto fn_exit;
+
+	ret = wait_conversion_complete_polled(data);
+	if (ret < 0)
+		goto fn_exit;
+
+	/* Read data */
+	ret = i2c_smbus_read_word_data(client, ak09911_index_to_reg[index]);
+	if (ret < 0) {
+		dev_err(&client->dev, "Read axis data fails\n");
+		goto fn_exit;
+	}
+
+	mutex_unlock(&data->lock);
+
+	/* Clamp to valid range. */
+	*val = sign_extend32(clamp_t(s16, ret, -8192, 8191), 13);
+
+	return IIO_VAL_INT;
+
+fn_exit:
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int ak09911_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2,
+			    long mask)
+{
+	struct ak09911_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		return ak09911_read_axis(indio_dev, chan->address, val);
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = data->raw_to_gauss[chan->address];
+		return IIO_VAL_INT_PLUS_MICRO;
+	}
+
+	return -EINVAL;
+}
+
+#define AK09911_CHANNEL(axis, index)					\
+	{								\
+		.type = IIO_MAGN,					\
+		.modified = 1,						\
+		.channel2 = IIO_MOD_##axis,				\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
+			     BIT(IIO_CHAN_INFO_SCALE),			\
+		.address = index,					\
+	}
+
+static const struct iio_chan_spec ak09911_channels[] = {
+	AK09911_CHANNEL(X, 0), AK09911_CHANNEL(Y, 1), AK09911_CHANNEL(Z, 2),
+};
+
+static const struct iio_info ak09911_info = {
+	.read_raw = &ak09911_read_raw,
+	.driver_module = THIS_MODULE,
+};
+
+static const struct acpi_device_id ak_acpi_match[] = {
+	{"AK009911", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
+
+static int ak09911_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct iio_dev *indio_dev;
+	struct ak09911_data *data;
+	const char *name;
+	int ret;
+
+	ret = ak09911_verify_chip_id(client);
+	if (ret) {
+		dev_err(&client->dev, "AK00911 not detected\n");
+		return -ENODEV;
+	}
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+
+	data->client = client;
+	mutex_init(&data->lock);
+
+	ret = ak09911_get_asa(client);
+	if (ret)
+		return ret;
+
+	if (id)
+		name = id->name;
+	else if (ACPI_HANDLE(&client->dev))
+		name = dev_name(&client->dev);
+	else
+		return -ENODEV;
+
+	dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->channels = ak09911_channels;
+	indio_dev->num_channels = ARRAY_SIZE(ak09911_channels);
+	indio_dev->info = &ak09911_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = name;
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id ak09911_id[] = {
+	{"ak09911", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, ak09911_id);
+
+static struct i2c_driver ak09911_driver = {
+	.driver = {
+		.name	= "ak09911",
+		.acpi_match_table = ACPI_PTR(ak_acpi_match),
+	},
+	.probe		= ak09911_probe,
+	.id_table	= ak09911_id,
+};
+module_i2c_driver(ak09911_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("AK09911 Compass driver");
diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig
index ffac8ac1efca..15afbc919521 100644
--- a/drivers/iio/pressure/Kconfig
+++ b/drivers/iio/pressure/Kconfig
@@ -70,4 +70,14 @@ config IIO_ST_PRESS_SPI
 	depends on IIO_ST_PRESS
 	depends on IIO_ST_SENSORS_SPI
 
+config T5403
+	tristate "EPCOS T5403 digital barometric pressure sensor driver"
+	depends on I2C
+	help
+	  Say yes here to build support for the EPCOS T5403 pressure sensor
+	  connected via I2C.
+
+          To compile this driver as a module, choose M here: the module
+          will be called t5403.
+
 endmenu
diff --git a/drivers/iio/pressure/Makefile b/drivers/iio/pressure/Makefile
index c53d2500737a..90a37e85cf21 100644
--- a/drivers/iio/pressure/Makefile
+++ b/drivers/iio/pressure/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_MPL3115) += mpl3115.o
 obj-$(CONFIG_IIO_ST_PRESS) += st_pressure.o
 st_pressure-y := st_pressure_core.o
 st_pressure-$(CONFIG_IIO_BUFFER) += st_pressure_buffer.o
+obj-$(CONFIG_T5403) += t5403.o
 
 obj-$(CONFIG_IIO_ST_PRESS_I2C) += st_pressure_i2c.o
 obj-$(CONFIG_IIO_ST_PRESS_SPI) += st_pressure_spi.o
diff --git a/drivers/iio/pressure/t5403.c b/drivers/iio/pressure/t5403.c
new file mode 100644
index 000000000000..e11cd3938d67
--- /dev/null
+++ b/drivers/iio/pressure/t5403.c
@@ -0,0 +1,275 @@
+/*
+ * t5403.c - Support for EPCOS T5403 pressure/temperature sensor
+ *
+ * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License.  See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * (7-bit I2C slave address 0x77)
+ *
+ * TODO: end-of-conversion irq
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/delay.h>
+
+#define T5403_DATA 0xf5 /* data, LSB first, 16 bit */
+#define T5403_CALIB_DATA 0x8e /* 10 calibration coeff., LSB first, 16 bit */
+#define T5403_SLAVE_ADDR 0x88 /* I2C slave address, 0x77 */
+#define T5403_COMMAND 0xf1
+
+/* command bits */
+#define T5403_MODE_SHIFT 3 /* conversion time: 2, 8, 16, 66 ms */
+#define T5403_PT BIT(1) /* 0 .. pressure, 1 .. temperature measurement */
+#define T5403_SCO BIT(0) /* start conversion */
+
+#define T5403_MODE_LOW 0
+#define T5403_MODE_STANDARD 1
+#define T5403_MODE_HIGH 2
+#define T5403_MODE_ULTRA_HIGH 3
+
+#define T5403_I2C_MASK (~BIT(7))
+#define T5403_I2C_ADDR 0x77
+
+static const int t5403_pressure_conv_ms[] = {2, 8, 16, 66};
+
+struct t5403_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	int mode;
+	__le16 c[10];
+};
+
+#define T5403_C_U16(i) le16_to_cpu(data->c[(i) - 1])
+#define T5403_C(i) sign_extend32(T5403_C_U16(i), 15)
+
+static int t5403_read(struct t5403_data *data, bool pressure)
+{
+	int wait_time = 3;  /* wakeup time in ms */
+
+	int ret = i2c_smbus_write_byte_data(data->client, T5403_COMMAND,
+		(pressure ? (data->mode << T5403_MODE_SHIFT) : T5403_PT) |
+		T5403_SCO);
+	if (ret < 0)
+		return ret;
+
+	wait_time += pressure ? t5403_pressure_conv_ms[data->mode] : 2;
+
+	msleep(wait_time);
+
+	return i2c_smbus_read_word_data(data->client, T5403_DATA);
+}
+
+static int t5403_comp_pressure(struct t5403_data *data, int *val, int *val2)
+{
+	int ret;
+	s16 t_r;
+	u16 p_r;
+	s32 S, O, X;
+
+	mutex_lock(&data->lock);
+
+	ret = t5403_read(data, false);
+	if (ret < 0)
+		goto done;
+	t_r = ret;
+
+	ret = t5403_read(data, true);
+	if (ret < 0)
+		goto done;
+	p_r = ret;
+
+	/* see EPCOS application note */
+	S = T5403_C_U16(3) + (s32) T5403_C_U16(4) * t_r / 0x20000 +
+		T5403_C(5) * t_r / 0x8000 * t_r / 0x80000 +
+		T5403_C(9) * t_r / 0x8000 * t_r / 0x8000 * t_r / 0x10000;
+
+	O = T5403_C(6) * 0x4000 + T5403_C(7) * t_r / 8 +
+		T5403_C(8) * t_r / 0x8000 * t_r / 16 +
+		T5403_C(9) * t_r / 0x8000 * t_r / 0x10000 * t_r;
+
+	X = (S * p_r + O) / 0x4000;
+
+	X += ((X - 75000) * (X - 75000) / 0x10000 - 9537) *
+	    T5403_C(10) / 0x10000;
+
+	*val = X / 1000;
+	*val2 = (X % 1000) * 1000;
+
+done:
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+static int t5403_comp_temp(struct t5403_data *data, int *val)
+{
+	int ret;
+	s16 t_r;
+
+	mutex_lock(&data->lock);
+	ret = t5403_read(data, false);
+	if (ret < 0)
+		goto done;
+	t_r = ret;
+
+	/* see EPCOS application note */
+	*val = ((s32) T5403_C_U16(1) * t_r / 0x100 +
+		(s32) T5403_C_U16(2) * 0x40) * 1000 / 0x10000;
+
+done:
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+static int t5403_read_raw(struct iio_dev *indio_dev,
+			  struct iio_chan_spec const *chan,
+			  int *val, int *val2, long mask)
+{
+	struct t5403_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		switch (chan->type) {
+		case IIO_PRESSURE:
+			ret = t5403_comp_pressure(data, val, val2);
+			if (ret < 0)
+				return ret;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			ret = t5403_comp_temp(data, val);
+			if (ret < 0)
+				return ret;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+	    }
+	case IIO_CHAN_INFO_INT_TIME:
+		*val = 0;
+		*val2 = t5403_pressure_conv_ms[data->mode] * 1000;
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int t5403_write_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int val, int val2, long mask)
+{
+	struct t5403_data *data = iio_priv(indio_dev);
+	int i;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		if (val != 0)
+			return -EINVAL;
+		for (i = 0; i < ARRAY_SIZE(t5403_pressure_conv_ms); i++)
+			if (val2 == t5403_pressure_conv_ms[i] * 1000) {
+				mutex_lock(&data->lock);
+				data->mode = i;
+				mutex_unlock(&data->lock);
+				return 0;
+			}
+		return -EINVAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_chan_spec t5403_channels[] = {
+	{
+		.type = IIO_PRESSURE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+		    BIT(IIO_CHAN_INFO_INT_TIME),
+	},
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+	},
+};
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.002 0.008 0.016 0.066");
+
+static struct attribute *t5403_attributes[] = {
+	&iio_const_attr_integration_time_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group t5403_attribute_group = {
+	.attrs = t5403_attributes,
+};
+
+static const struct iio_info t5403_info = {
+	.read_raw = &t5403_read_raw,
+	.write_raw = &t5403_write_raw,
+	.attrs = &t5403_attribute_group,
+	.driver_module = THIS_MODULE,
+};
+
+static int t5403_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct t5403_data *data;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA |
+	    I2C_FUNC_SMBUS_I2C_BLOCK))
+		return -ENODEV;
+
+	ret = i2c_smbus_read_byte_data(client, T5403_SLAVE_ADDR);
+	if (ret < 0)
+		return ret;
+	if ((ret & T5403_I2C_MASK) != T5403_I2C_ADDR)
+		return -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	mutex_init(&data->lock);
+
+	i2c_set_clientdata(client, indio_dev);
+	indio_dev->info = &t5403_info;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = t5403_channels;
+	indio_dev->num_channels = ARRAY_SIZE(t5403_channels);
+
+	data->mode = T5403_MODE_STANDARD;
+
+	ret = i2c_smbus_read_i2c_block_data(data->client, T5403_CALIB_DATA,
+	    sizeof(data->c), (u8 *) data->c);
+	if (ret < 0)
+		return ret;
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id t5403_id[] = {
+	{ "t5403", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, t5403_id);
+
+static struct i2c_driver t5403_driver = {
+	.driver = {
+		.name	= "t5403",
+	},
+	.probe = t5403_probe,
+	.id_table = t5403_id,
+};
+module_i2c_driver(t5403_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("EPCOS T5403 pressure/temperature sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c
index bf677bfe8eb2..5e780ef206f3 100644
--- a/drivers/iio/proximity/as3935.c
+++ b/drivers/iio/proximity/as3935.c
@@ -232,7 +232,7 @@ static void as3935_event_work(struct work_struct *work)
 
 	switch (val) {
 	case AS3935_EVENT_INT:
-		iio_trigger_poll(st->trig, iio_get_time_ns());
+		iio_trigger_poll(st->trig);
 		break;
 	case AS3935_NOISE_INT:
 		dev_warn(&st->spi->dev, "noise level is too high");
diff --git a/drivers/iio/trigger/iio-trig-interrupt.c b/drivers/iio/trigger/iio-trig-interrupt.c
index 02577ec54c6b..7a149a7822bc 100644
--- a/drivers/iio/trigger/iio-trig-interrupt.c
+++ b/drivers/iio/trigger/iio-trig-interrupt.c
@@ -24,8 +24,7 @@ struct iio_interrupt_trigger_info {
 
 static irqreturn_t iio_interrupt_trigger_poll(int irq, void *private)
 {
-	/* Timestamp not currently provided */
-	iio_trigger_poll(private, 0);
+	iio_trigger_poll(private);
 	return IRQ_HANDLED;
 }
 
diff --git a/drivers/iio/trigger/iio-trig-sysfs.c b/drivers/iio/trigger/iio-trig-sysfs.c
index 15e3b850f513..254c7e906127 100644
--- a/drivers/iio/trigger/iio-trig-sysfs.c
+++ b/drivers/iio/trigger/iio-trig-sysfs.c
@@ -96,7 +96,7 @@ static void iio_sysfs_trigger_work(struct irq_work *work)
 	struct iio_sysfs_trig *trig = container_of(work, struct iio_sysfs_trig,
 							work);
 
-	iio_trigger_poll(trig->trig, 0);
+	iio_trigger_poll(trig->trig);
 }
 
 static ssize_t iio_sysfs_trigger_poll(struct device *dev,