Merge tag 'iio-for-4.1a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of new drivers, cleanups and functionality for IIO in the 4.1 cycle.

New drivers
* CM3323 color sensor.
* MS5611 pressure and temperature sensor.

New functionality
* mup6050 - create mux clients for devices described via ACPI. The reasoning
     and approach taken in this patch are complex.  Basically there is no
     otherway of finding out what is there than by some esoteric look ups in
     the ACPI data.
* cm3232 - PM support
* itg3200 - suspend/resume support
* mcp320x - add more ADCs to the kconfig to reflect what the driver supports
     (this patch and the bindings got left behind when the support was added
      a while back).

Docs / utils
* ti-adc128s052 - DT bindings.
* mcp3422 - DT bindings.
* mcp320x - DT bindings
* ABI docs for event threshold scale attributes, in_magn_offset, proximity
  scan_element and thresh falling/rising values for accelerometers.  All
  elements long in use that have slipped by being explicitly documented.
* Tidy up the tools previously in drivers/staging/iio/Documentation and move
  them out to /tools/iio. Yet another move that should have happened long ago.
  This time Roberta Dobrescu did the leg work.  Thanks!

Core Cleanups
* Export userspace IIO headers.  We should have done the appropriate header
  splitting a long time ago. Thanks to Daniel for sorting this out.

* Refactor the registring of attributes for buffers to move all non-custom
  ones to a vector allowing easier additions to the current set in the future.

Driver Cleanups
* gpiod related cleanups.  Make use of the additional parameter to specify
  	initial direciton to avoid extra code.
* bmc150 - Various refactorings to reduce code repitition and prepare for
           hardware buffer support.  Some of these cleanups are good even
	   without the new functionality.
* kmx61 - direct use of index to an array avoiding a structure element which
          was always the index to an element in an array of that structure.
* vf610 - avoid incorrect type for return from wait_for_completion_timeout.
* gp2ap020a00f - use put_unaligned_le32 for slight code simplification.
* ade7754 - improve error handling including suppressing some build warnings.
* ade7759 - improve error handling including suppressing some build warnings.
* hmc5843 - Long line and indentation fixes. Also some constifying of various
      constant data.
* ade7854 - 80+ character line splitting.
* ad2s1210 - fix wrong printf format string.
* mxs-lradc - fix wrong printf format string.
* ade7954-i2c - code alignment fixes and other trivial but worthwhile bits.
* periodic rtc trigger - make the frequency type an unsigned int as it
  is always treated as such.
* jsa1212 - constify struct regmap_config as it is constant.
* ad7793 - typo in the MODULE_DESCRIPTION
* mma9551 - check gpiod_to_irq errors.  Note that this doesn't actually cause
    any trouble but is worth tidying up as obviously incorrect.
* mlx90614 - refactor the register symbols to make it clear which reads are to
    RAM not PROM.

29 files changed, 1498 insertions, 384 deletions

diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
index 066d0c04072c..f1b80c4c0b35 100644
--- a/drivers/iio/accel/bmc150-accel.c
+++ b/drivers/iio/accel/bmc150-accel.c
@@ -147,10 +147,37 @@ struct bmc150_accel_chip_info {
 	const struct bmc150_scale_info scale_table[4];
 };
 
+struct bmc150_accel_interrupt {
+	const struct bmc150_accel_interrupt_info *info;
+	atomic_t users;
+};
+
+struct bmc150_accel_trigger {
+	struct bmc150_accel_data *data;
+	struct iio_trigger *indio_trig;
+	int (*setup)(struct bmc150_accel_trigger *t, bool state);
+	int intr;
+	bool enabled;
+};
+
+enum bmc150_accel_interrupt_id {
+	BMC150_ACCEL_INT_DATA_READY,
+	BMC150_ACCEL_INT_ANY_MOTION,
+	BMC150_ACCEL_INT_WATERMARK,
+	BMC150_ACCEL_INTERRUPTS,
+};
+
+enum bmc150_accel_trigger_id {
+	BMC150_ACCEL_TRIGGER_DATA_READY,
+	BMC150_ACCEL_TRIGGER_ANY_MOTION,
+	BMC150_ACCEL_TRIGGERS,
+};
+
 struct bmc150_accel_data {
 	struct i2c_client *client;
-	struct iio_trigger *dready_trig;
-	struct iio_trigger *motion_trig;
+	struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
+	atomic_t active_intr;
+	struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
 	struct mutex mutex;
 	s16 buffer[8];
 	u8 bw_bits;
@@ -158,8 +185,6 @@ struct bmc150_accel_data {
 	u32 slope_thres;
 	u32 range;
 	int ev_enable_state;
-	bool dready_trigger_on;
-	bool motion_trigger_on;
 	int64_t timestamp;
 	const struct bmc150_accel_chip_info *chip_info;
 };
@@ -269,6 +294,46 @@ static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
 	return -EINVAL;
 }
 
+static int bmc150_accel_update_slope(struct bmc150_accel_data *data)
+{
+	int ret, val;
+
+	ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6,
+					data->slope_thres);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_6\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_5\n");
+		return ret;
+	}
+
+	val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur;
+	ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5,
+					val);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error write reg_int_5\n");
+		return ret;
+	}
+
+	dev_dbg(&data->client->dev, "%s: %x %x\n", __func__, data->slope_thres,
+		data->slope_dur);
+
+	return ret;
+}
+
+static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t,
+					 bool state)
+{
+	if (state)
+		return bmc150_accel_update_slope(t->data);
+
+	return 0;
+}
+
 static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
 {
 	int ret;
@@ -307,32 +372,12 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
 
 	data->range = BMC150_ACCEL_DEF_RANGE_4G;
 
-	/* Set default slope duration */
-	ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_int_5\n");
-		return ret;
-	}
-	data->slope_dur |= BMC150_ACCEL_DEF_SLOPE_DURATION;
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_5,
-					data->slope_dur);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_5\n");
-		return ret;
-	}
-	dev_dbg(&data->client->dev, "slope_dur %x\n", data->slope_dur);
-
-	/* Set default slope thresholds */
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_6,
-					BMC150_ACCEL_DEF_SLOPE_THRESHOLD);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_6\n");
-		return ret;
-	}
+	/* Set default slope duration and thresholds */
 	data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
-	dev_dbg(&data->client->dev, "slope_thres %x\n", data->slope_thres);
+	data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
+	ret = bmc150_accel_update_slope(data);
+	if (ret < 0)
+		return ret;
 
 	/* Set default as latched interrupts */
 	ret = i2c_smbus_write_byte_data(data->client,
@@ -348,155 +393,6 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
 	return 0;
 }
 
-static int bmc150_accel_setup_any_motion_interrupt(
-					struct bmc150_accel_data *data,
-					bool status)
-{
-	int ret;
-
-	/* Enable/Disable INT1 mapping */
-	ret = i2c_smbus_read_byte_data(data->client,
-				       BMC150_ACCEL_REG_INT_MAP_0);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_int_map_0\n");
-		return ret;
-	}
-	if (status)
-		ret |= BMC150_ACCEL_INT_MAP_0_BIT_SLOPE;
-	else
-		ret &= ~BMC150_ACCEL_INT_MAP_0_BIT_SLOPE;
-
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_MAP_0,
-					ret);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_map_0\n");
-		return ret;
-	}
-
-	if (status) {
-		/* Set slope duration (no of samples) */
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMC150_ACCEL_REG_INT_5,
-						data->slope_dur);
-		if (ret < 0) {
-			dev_err(&data->client->dev, "Error write reg_int_5\n");
-			return ret;
-		}
-
-		/* Set slope thresholds */
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMC150_ACCEL_REG_INT_6,
-						data->slope_thres);
-		if (ret < 0) {
-			dev_err(&data->client->dev, "Error write reg_int_6\n");
-			return ret;
-		}
-
-		/*
-		 * New data interrupt is always non-latched,
-		 * which will have higher priority, so no need
-		 * to set latched mode, we will be flooded anyway with INTR
-		 */
-		if (!data->dready_trigger_on) {
-			ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_RST_LATCH,
-					BMC150_ACCEL_INT_MODE_LATCH_INT |
-					BMC150_ACCEL_INT_MODE_LATCH_RESET);
-			if (ret < 0) {
-				dev_err(&data->client->dev,
-					"Error writing reg_int_rst_latch\n");
-				return ret;
-			}
-		}
-
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMC150_ACCEL_REG_INT_EN_0,
-						BMC150_ACCEL_INT_EN_BIT_SLP_X |
-						BMC150_ACCEL_INT_EN_BIT_SLP_Y |
-						BMC150_ACCEL_INT_EN_BIT_SLP_Z);
-	} else
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMC150_ACCEL_REG_INT_EN_0,
-						0);
-
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_en_0\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static int bmc150_accel_setup_new_data_interrupt(struct bmc150_accel_data *data,
-					   bool status)
-{
-	int ret;
-
-	/* Enable/Disable INT1 mapping */
-	ret = i2c_smbus_read_byte_data(data->client,
-				       BMC150_ACCEL_REG_INT_MAP_1);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_int_map_1\n");
-		return ret;
-	}
-	if (status)
-		ret |= BMC150_ACCEL_INT_MAP_1_BIT_DATA;
-	else
-		ret &= ~BMC150_ACCEL_INT_MAP_1_BIT_DATA;
-
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_MAP_1,
-					ret);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_map_1\n");
-		return ret;
-	}
-
-	if (status) {
-		/*
-		 * Set non latched mode interrupt and clear any latched
-		 * interrupt
-		 */
-		ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_RST_LATCH,
-					BMC150_ACCEL_INT_MODE_NON_LATCH_INT |
-					BMC150_ACCEL_INT_MODE_LATCH_RESET);
-		if (ret < 0) {
-			dev_err(&data->client->dev,
-				"Error writing reg_int_rst_latch\n");
-			return ret;
-		}
-
-		ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_EN_1,
-					BMC150_ACCEL_INT_EN_BIT_DATA_EN);
-
-	} else {
-		/* Restore default interrupt mode */
-		ret = i2c_smbus_write_byte_data(data->client,
-					BMC150_ACCEL_REG_INT_RST_LATCH,
-					BMC150_ACCEL_INT_MODE_LATCH_INT |
-					BMC150_ACCEL_INT_MODE_LATCH_RESET);
-		if (ret < 0) {
-			dev_err(&data->client->dev,
-				"Error writing reg_int_rst_latch\n");
-			return ret;
-		}
-
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMC150_ACCEL_REG_INT_EN_1,
-						0);
-	}
-
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_en_1\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val,
 			       int *val2)
 {
@@ -554,6 +450,114 @@ static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
 }
 #endif
 
+static const struct bmc150_accel_interrupt_info {
+	u8 map_reg;
+	u8 map_bitmask;
+	u8 en_reg;
+	u8 en_bitmask;
+} bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = {
+	{ /* data ready interrupt */
+		.map_reg = BMC150_ACCEL_REG_INT_MAP_1,
+		.map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA,
+		.en_reg = BMC150_ACCEL_REG_INT_EN_1,
+		.en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN,
+	},
+	{  /* motion interrupt */
+		.map_reg = BMC150_ACCEL_REG_INT_MAP_0,
+		.map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE,
+		.en_reg = BMC150_ACCEL_REG_INT_EN_0,
+		.en_bitmask =  BMC150_ACCEL_INT_EN_BIT_SLP_X |
+			BMC150_ACCEL_INT_EN_BIT_SLP_Y |
+			BMC150_ACCEL_INT_EN_BIT_SLP_Z
+	},
+};
+
+static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev,
+					  struct bmc150_accel_data *data)
+{
+	int i;
+
+	for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++)
+		data->interrupts[i].info = &bmc150_accel_interrupts[i];
+}
+
+static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i,
+				      bool state)
+{
+	struct bmc150_accel_interrupt *intr = &data->interrupts[i];
+	const struct bmc150_accel_interrupt_info *info = intr->info;
+	int ret;
+
+	if (state) {
+		if (atomic_inc_return(&intr->users) > 1)
+			return 0;
+	} else {
+		if (atomic_dec_return(&intr->users) > 0)
+			return 0;
+	}
+
+	/*
+	 * We will expect the enable and disable to do operation in
+	 * in reverse order. This will happen here anyway as our
+	 * resume operation uses sync mode runtime pm calls, the
+	 * suspend operation will be delayed by autosuspend delay
+	 * So the disable operation will still happen in reverse of
+	 * enable operation. When runtime pm is disabled the mode
+	 * is always on so sequence doesn't matter
+	 */
+	ret = bmc150_accel_set_power_state(data, state);
+	if (ret < 0)
+		return ret;
+
+	/* map the interrupt to the appropriate pins */
+	ret = i2c_smbus_read_byte_data(data->client, info->map_reg);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_map\n");
+		goto out_fix_power_state;
+	}
+	if (state)
+		ret |= info->map_bitmask;
+	else
+		ret &= ~info->map_bitmask;
+
+	ret = i2c_smbus_write_byte_data(data->client, info->map_reg,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_map\n");
+		goto out_fix_power_state;
+	}
+
+	/* enable/disable the interrupt */
+	ret = i2c_smbus_read_byte_data(data->client, info->en_reg);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_en\n");
+		goto out_fix_power_state;
+	}
+
+	if (state)
+		ret |= info->en_bitmask;
+	else
+		ret &= ~info->en_bitmask;
+
+	ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_en\n");
+		goto out_fix_power_state;
+	}
+
+	if (state)
+		atomic_inc(&data->active_intr);
+	else
+		atomic_dec(&data->active_intr);
+
+	return 0;
+
+out_fix_power_state:
+	bmc150_accel_set_power_state(data, false);
+	return ret;
+}
+
+
 static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val)
 {
 	int ret, i;
@@ -732,7 +736,7 @@ static int bmc150_accel_read_event(struct iio_dev *indio_dev,
 		*val = data->slope_thres;
 		break;
 	case IIO_EV_INFO_PERIOD:
-		*val = data->slope_dur & BMC150_ACCEL_SLOPE_DUR_MASK;
+		*val = data->slope_dur;
 		break;
 	default:
 		return -EINVAL;
@@ -755,11 +759,10 @@ static int bmc150_accel_write_event(struct iio_dev *indio_dev,
 
 	switch (info) {
 	case IIO_EV_INFO_VALUE:
-		data->slope_thres = val;
+		data->slope_thres = val & 0xFF;
 		break;
 	case IIO_EV_INFO_PERIOD:
-		data->slope_dur &= ~BMC150_ACCEL_SLOPE_DUR_MASK;
-		data->slope_dur |= val & BMC150_ACCEL_SLOPE_DUR_MASK;
+		data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK;
 		break;
 	default:
 		return -EINVAL;
@@ -788,36 +791,14 @@ static int bmc150_accel_write_event_config(struct iio_dev *indio_dev,
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
 	int ret;
 
-	if (state && data->ev_enable_state)
+	if (state == data->ev_enable_state)
 		return 0;
 
 	mutex_lock(&data->mutex);
 
-	if (!state && data->motion_trigger_on) {
-		data->ev_enable_state = 0;
-		mutex_unlock(&data->mutex);
-		return 0;
-	}
-
-	/*
-	 * We will expect the enable and disable to do operation in
-	 * in reverse order. This will happen here anyway as our
-	 * resume operation uses sync mode runtime pm calls, the
-	 * suspend operation will be delayed by autosuspend delay
-	 * So the disable operation will still happen in reverse of
-	 * enable operation. When runtime pm is disabled the mode
-	 * is always on so sequence doesn't matter
-	 */
-
-	ret = bmc150_accel_set_power_state(data, state);
-	if (ret < 0) {
-		mutex_unlock(&data->mutex);
-		return ret;
-	}
-
-	ret =  bmc150_accel_setup_any_motion_interrupt(data, state);
+	ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION,
+					 state);
 	if (ret < 0) {
-		bmc150_accel_set_power_state(data, false);
 		mutex_unlock(&data->mutex);
 		return ret;
 	}
@@ -832,11 +813,14 @@ static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev,
 				   struct iio_trigger *trig)
 {
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int i;
 
-	if (data->dready_trig != trig && data->motion_trig != trig)
-		return -EINVAL;
+	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+		if (data->triggers[i].indio_trig == trig)
+			return 0;
+	}
 
-	return 0;
+	return -EINVAL;
 }
 
 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
@@ -1008,12 +992,12 @@ err_read:
 
 static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
 {
-	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
-	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
+	struct bmc150_accel_data *data = t->data;
 	int ret;
 
 	/* new data interrupts don't need ack */
-	if (data->dready_trigger_on)
+	if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY])
 		return 0;
 
 	mutex_lock(&data->mutex);
@@ -1032,43 +1016,35 @@ static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
 	return 0;
 }
 
-static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig,
+static int bmc150_accel_trigger_set_state(struct iio_trigger *trig,
 						   bool state)
 {
-	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
-	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
+	struct bmc150_accel_data *data = t->data;
 	int ret;
 
 	mutex_lock(&data->mutex);
 
-	if (!state && data->ev_enable_state && data->motion_trigger_on) {
-		data->motion_trigger_on = false;
+	if (t->enabled == state) {
 		mutex_unlock(&data->mutex);
 		return 0;
 	}
 
-	/*
-	 * Refer to comment in bmc150_accel_write_event_config for
-	 * enable/disable operation order
-	 */
-	ret = bmc150_accel_set_power_state(data, state);
-	if (ret < 0) {
-		mutex_unlock(&data->mutex);
-		return ret;
+	if (t->setup) {
+		ret = t->setup(t, state);
+		if (ret < 0) {
+			mutex_unlock(&data->mutex);
+			return ret;
+		}
 	}
-	if (data->motion_trig == trig)
-		ret =  bmc150_accel_setup_any_motion_interrupt(data, state);
-	else
-		ret = bmc150_accel_setup_new_data_interrupt(data, state);
+
+	ret = bmc150_accel_set_interrupt(data, t->intr, state);
 	if (ret < 0) {
-		bmc150_accel_set_power_state(data, false);
 		mutex_unlock(&data->mutex);
 		return ret;
 	}
-	if (data->motion_trig == trig)
-		data->motion_trigger_on = state;
-	else
-		data->dready_trigger_on = state;
+
+	t->enabled = state;
 
 	mutex_unlock(&data->mutex);
 
@@ -1076,7 +1052,7 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig,
 }
 
 static const struct iio_trigger_ops bmc150_accel_trigger_ops = {
-	.set_trigger_state = bmc150_accel_data_rdy_trigger_set_state,
+	.set_trigger_state = bmc150_accel_trigger_set_state,
 	.try_reenable = bmc150_accel_trig_try_reen,
 	.owner = THIS_MODULE,
 };
@@ -1122,7 +1098,7 @@ static irqreturn_t bmc150_accel_event_handler(int irq, void *private)
 							dir),
 							data->timestamp);
 ack_intr_status:
-	if (!data->dready_trigger_on)
+	if (!data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY].enabled)
 		ret = i2c_smbus_write_byte_data(data->client,
 					BMC150_ACCEL_REG_INT_RST_LATCH,
 					BMC150_ACCEL_INT_MODE_LATCH_INT |
@@ -1135,13 +1111,16 @@ static irqreturn_t bmc150_accel_data_rdy_trig_poll(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int i;
 
 	data->timestamp = iio_get_time_ns();
 
-	if (data->dready_trigger_on)
-		iio_trigger_poll(data->dready_trig);
-	else if (data->motion_trigger_on)
-		iio_trigger_poll(data->motion_trig);
+	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+		if (data->triggers[i].enabled) {
+			iio_trigger_poll(data->triggers[i].indio_trig);
+			break;
+		}
+	}
 
 	if (data->ev_enable_state)
 		return IRQ_WAKE_THREAD;
@@ -1176,16 +1155,12 @@ static int bmc150_accel_gpio_probe(struct i2c_client *client,
 	dev = &client->dev;
 
 	/* data ready gpio interrupt pin */
-	gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0);
+	gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0, GPIOD_IN);
 	if (IS_ERR(gpio)) {
 		dev_err(dev, "Failed: gpio get index\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);
@@ -1193,6 +1168,70 @@ static int bmc150_accel_gpio_probe(struct i2c_client *client,
 	return ret;
 }
 
+static const struct {
+	int intr;
+	const char *name;
+	int (*setup)(struct bmc150_accel_trigger *t, bool state);
+} bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = {
+	{
+		.intr = 0,
+		.name = "%s-dev%d",
+	},
+	{
+		.intr = 1,
+		.name = "%s-any-motion-dev%d",
+		.setup = bmc150_accel_any_motion_setup,
+	},
+};
+
+static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data,
+					     int from)
+{
+	int i;
+
+	for (i = from; i >= 0; i++) {
+		if (data->triggers[i].indio_trig) {
+			iio_trigger_unregister(data->triggers[i].indio_trig);
+			data->triggers[i].indio_trig = NULL;
+		}
+	}
+}
+
+static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev,
+				       struct bmc150_accel_data *data)
+{
+	int i, ret;
+
+	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+		struct bmc150_accel_trigger *t = &data->triggers[i];
+
+		t->indio_trig = devm_iio_trigger_alloc(&data->client->dev,
+					       bmc150_accel_triggers[i].name,
+						       indio_dev->name,
+						       indio_dev->id);
+		if (!t->indio_trig) {
+			ret = -ENOMEM;
+			break;
+		}
+
+		t->indio_trig->dev.parent = &data->client->dev;
+		t->indio_trig->ops = &bmc150_accel_trigger_ops;
+		t->intr = bmc150_accel_triggers[i].intr;
+		t->data = data;
+		t->setup = bmc150_accel_triggers[i].setup;
+		iio_trigger_set_drvdata(t->indio_trig, t);
+
+		ret = iio_trigger_register(t->indio_trig);
+		if (ret)
+			break;
+	}
+
+	if (ret)
+		bmc150_accel_unregister_triggers(data, i - 1);
+
+	return ret;
+}
+
 static int bmc150_accel_probe(struct i2c_client *client,
 			      const struct i2c_device_id *id)
 {
@@ -1247,36 +1286,26 @@ static int bmc150_accel_probe(struct i2c_client *client,
 		if (ret)
 			return ret;
 
-		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
-							   "%s-dev%d",
-							   indio_dev->name,
-							   indio_dev->id);
-		if (!data->dready_trig)
-			return -ENOMEM;
-
-		data->motion_trig = devm_iio_trigger_alloc(&client->dev,
-							  "%s-any-motion-dev%d",
-							  indio_dev->name,
-							  indio_dev->id);
-		if (!data->motion_trig)
-			return -ENOMEM;
-
-		data->dready_trig->dev.parent = &client->dev;
-		data->dready_trig->ops = &bmc150_accel_trigger_ops;
-		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
-		ret = iio_trigger_register(data->dready_trig);
-		if (ret)
+		/*
+		 * Set latched mode interrupt. While certain interrupts are
+		 * non-latched regardless of this settings (e.g. new data) we
+		 * want to use latch mode when we can to prevent interrupt
+		 * flooding.
+		 */
+		ret = i2c_smbus_write_byte_data(data->client,
+						BMC150_ACCEL_REG_INT_RST_LATCH,
+					     BMC150_ACCEL_INT_MODE_LATCH_RESET);
+		if (ret < 0) {
+			dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
 			return ret;
-
-		data->motion_trig->dev.parent = &client->dev;
-		data->motion_trig->ops = &bmc150_accel_trigger_ops;
-		iio_trigger_set_drvdata(data->motion_trig, indio_dev);
-		ret = iio_trigger_register(data->motion_trig);
-		if (ret) {
-			data->motion_trig = NULL;
-			goto err_trigger_unregister;
 		}
 
+		bmc150_accel_interrupts_setup(indio_dev, data);
+
+		ret = bmc150_accel_triggers_setup(indio_dev, data);
+		if (ret)
+			return ret;
+
 		ret = iio_triggered_buffer_setup(indio_dev,
 						 &iio_pollfunc_store_time,
 						 bmc150_accel_trigger_handler,
@@ -1308,13 +1337,10 @@ static int bmc150_accel_probe(struct i2c_client *client,
 err_iio_unregister:
 	iio_device_unregister(indio_dev);
 err_buffer_cleanup:
-	if (data->dready_trig)
+	if (indio_dev->pollfunc)
 		iio_triggered_buffer_cleanup(indio_dev);
 err_trigger_unregister:
-	if (data->dready_trig)
-		iio_trigger_unregister(data->dready_trig);
-	if (data->motion_trig)
-		iio_trigger_unregister(data->motion_trig);
+	bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
 
 	return ret;
 }
@@ -1330,11 +1356,7 @@ static int bmc150_accel_remove(struct i2c_client *client)
 
 	iio_device_unregister(indio_dev);
 
-	if (data->dready_trig) {
-		iio_triggered_buffer_cleanup(indio_dev);
-		iio_trigger_unregister(data->dready_trig);
-		iio_trigger_unregister(data->motion_trig);
-	}
+	bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
 
 	mutex_lock(&data->mutex);
 	bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
@@ -1362,8 +1384,7 @@ static int bmc150_accel_resume(struct device *dev)
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
 
 	mutex_lock(&data->mutex);
-	if (data->dready_trigger_on || data->motion_trigger_on ||
-							data->ev_enable_state)
+	if (atomic_read(&data->active_intr))
 		bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
 	mutex_unlock(&data->mutex);
 
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
index 567de269cc00..a98b5d212fb3 100644
--- a/drivers/iio/accel/kxcjk-1013.c
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -1169,16 +1169,12 @@ static int kxcjk1013_gpio_probe(struct i2c_client *client,
 	dev = &client->dev;
 
 	/* data ready gpio interrupt pin */
-	gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);
+	gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0, GPIOD_IN);
 	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);
diff --git a/drivers/iio/accel/mma9551.c b/drivers/iio/accel/mma9551.c
index 46c38351c6a3..7db7cc0bf362 100644
--- a/drivers/iio/accel/mma9551.c
+++ b/drivers/iio/accel/mma9551.c
@@ -418,17 +418,18 @@ static int mma9551_gpio_probe(struct iio_dev *indio_dev)
 	struct device *dev = &data->client->dev;
 
 	for (i = 0; i < MMA9551_GPIO_COUNT; i++) {
-		gpio = devm_gpiod_get_index(dev, MMA9551_GPIO_NAME, i);
+		gpio = devm_gpiod_get_index(dev, MMA9551_GPIO_NAME, i,
+					    GPIOD_IN);
 		if (IS_ERR(gpio)) {
 			dev_err(dev, "acpi gpio get index failed\n");
 			return PTR_ERR(gpio);
 		}
 
-		ret = gpiod_direction_input(gpio);
-		if (ret)
+		ret = gpiod_to_irq(gpio);
+		if (ret < 0)
 			return ret;
 
-		data->irqs[i] = gpiod_to_irq(gpio);
+		data->irqs[i] = ret;
 		ret = devm_request_threaded_irq(dev, data->irqs[i],
 				NULL, mma9551_event_handler,
 				IRQF_TRIGGER_RISING | IRQF_ONESHOT,
diff --git a/drivers/iio/accel/mma955