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Date:   Tue, 18 Jun 2019 11:06:36 +0200
From:   Fabien Lahoudere <fabien.lahoudere@...labora.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     kernel@...labora.com,
        Fabien Lahoudere <fabien.lahoudere@...labora.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 5/8] iio: common: cros_ec_sensors: use core structure

Drivers based on cros_ec_sensors_core have structure containing the
core structure. In order to simplify, we drop all the specific and
useless structure to use the same one in all drivers.
If a future driver need specific field, we can add a private pointer
to that data.

Signed-off-by: Fabien Lahoudere <fabien.lahoudere@...labora.com>
---
 .../common/cros_ec_sensors/cros_ec_sensors.c  | 114 ++++++++----------
 .../cros_ec_sensors/cros_ec_sensors_core.c    |   3 +-
 drivers/iio/light/cros_ec_light_prox.c        |  85 ++++++-------
 drivers/iio/pressure/cros_ec_baro.c           |  62 +++++-----
 .../linux/iio/common/cros_ec_sensors_core.h   |   3 +-
 5 files changed, 121 insertions(+), 146 deletions(-)

diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
index c4bee9265246..1f0d1c614ffc 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
@@ -24,58 +24,52 @@
 
 #define CROS_EC_SENSORS_MAX_CHANNELS 4
 
-/* State data for ec_sensors iio driver. */
-struct cros_ec_sensors_state {
-	/* Shared by all sensors */
-	struct cros_ec_sensors_core_state core;
-};
-
 static int cros_ec_sensors_read(struct iio_dev *indio_dev,
 			  struct iio_chan_spec const *chan,
 			  int *val, int *val2, long mask)
 {
-	struct cros_ec_sensors_state *st = iio_priv(indio_dev);
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
 	s16 data = 0;
 	s64 val64;
 	int i;
 	int ret;
 	int idx = chan->scan_index;
 
-	mutex_lock(&st->core.cmd_lock);
+	mutex_lock(&st->cmd_lock);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = st->core.read_ec_sensors_data(indio_dev, 1 << idx, &data);
+		ret = st->read_ec_sensors_data(indio_dev, 1 << idx, &data);
 		if (ret < 0)
 			break;
 		ret = IIO_VAL_INT;
 		*val = data;
 		break;
 	case IIO_CHAN_INFO_CALIBBIAS:
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
-		st->core.param.sensor_offset.flags = 0;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
+		st->param.sensor_offset.flags = 0;
 
-		ret = cros_ec_motion_send_host_cmd(&st->core, 0);
+		ret = cros_ec_motion_send_host_cmd(st, 0);
 		if (ret < 0)
 			break;
 
 		/* Save values */
 		for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
-			st->core.calib[i] =
-				st->core.resp->sensor_offset.offset[i];
+			st->calib[i] =
+				st->resp->sensor_offset.offset[i];
 		ret = IIO_VAL_INT;
-		*val = st->core.calib[idx];
+		*val = st->calib[idx];
 		break;
 	case IIO_CHAN_INFO_SCALE:
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
-		st->core.param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+		st->param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
 
-		ret = cros_ec_motion_send_host_cmd(&st->core, 0);
+		ret = cros_ec_motion_send_host_cmd(st, 0);
 		if (ret < 0)
 			break;
 
-		val64 = st->core.resp->sensor_range.ret;
-		switch (st->core.type) {
+		val64 = st->resp->sensor_range.ret;
+		switch (st->type) {
 		case MOTIONSENSE_TYPE_ACCEL:
 			/*
 			 * EC returns data in g, iio exepects m/s^2.
@@ -110,11 +104,10 @@ static int cros_ec_sensors_read(struct iio_dev *indio_dev,
 		}
 		break;
 	default:
-		ret = cros_ec_sensors_core_read(&st->core, chan, val, val2,
-						mask);
+		ret = cros_ec_sensors_core_read(st, chan, val, val2, mask);
 		break;
 	}
-	mutex_unlock(&st->core.cmd_lock);
+	mutex_unlock(&st->cmd_lock);
 
 	return ret;
 }
@@ -123,49 +116,48 @@ static int cros_ec_sensors_write(struct iio_dev *indio_dev,
 			       struct iio_chan_spec const *chan,
 			       int val, int val2, long mask)
 {
-	struct cros_ec_sensors_state *st = iio_priv(indio_dev);
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
 	int i;
 	int ret;
 	int idx = chan->scan_index;
 
-	mutex_lock(&st->core.cmd_lock);
+	mutex_lock(&st->cmd_lock);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_CALIBBIAS:
-		st->core.calib[idx] = val;
+		st->calib[idx] = val;
 
 		/* Send to EC for each axis, even if not complete */
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
-		st->core.param.sensor_offset.flags =
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
+		st->param.sensor_offset.flags =
 			MOTION_SENSE_SET_OFFSET;
 		for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
-			st->core.param.sensor_offset.offset[i] =
-				st->core.calib[i];
-		st->core.param.sensor_offset.temp =
+			st->param.sensor_offset.offset[i] =
+				st->calib[i];
+		st->param.sensor_offset.temp =
 			EC_MOTION_SENSE_INVALID_CALIB_TEMP;
 
-		ret = cros_ec_motion_send_host_cmd(&st->core, 0);
+		ret = cros_ec_motion_send_host_cmd(st, 0);
 		break;
 	case IIO_CHAN_INFO_SCALE:
-		if (st->core.type == MOTIONSENSE_TYPE_MAG) {
+		if (st->type == MOTIONSENSE_TYPE_MAG) {
 			ret = -EINVAL;
 			break;
 		}
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
-		st->core.param.sensor_range.data = val;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+		st->param.sensor_range.data = val;
 
 		/* Always roundup, so caller gets at least what it asks for. */
-		st->core.param.sensor_range.roundup = 1;
+		st->param.sensor_range.roundup = 1;
 
-		ret = cros_ec_motion_send_host_cmd(&st->core, 0);
+		ret = cros_ec_motion_send_host_cmd(st, 0);
 		break;
 	default:
-		ret = cros_ec_sensors_core_write(
-				&st->core, chan, val, val2, mask);
+		ret = cros_ec_sensors_core_write(st, chan, val, val2, mask);
 		break;
 	}
 
-	mutex_unlock(&st->core.cmd_lock);
+	mutex_unlock(&st->cmd_lock);
 
 	return ret;
 }
@@ -175,7 +167,7 @@ static int cros_ec_sensors_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
 	struct iio_dev *indio_dev;
-	struct cros_ec_sensors_state *state;
+	struct cros_ec_sensors_core_state *state;
 	int ret, i;
 
 	if (!ec_dev || !ec_dev->ec_dev) {
@@ -183,8 +175,8 @@ static int cros_ec_sensors_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	ret = cros_ec_sensors_core_init(pdev, sizeof(*state),
-					CROS_EC_SENSORS_MAX_CHANNELS, true);
+	ret = cros_ec_sensors_core_init(pdev, CROS_EC_SENSORS_MAX_CHANNELS,
+					true);
 	if (ret)
 		return ret;
 
@@ -192,46 +184,46 @@ static int cros_ec_sensors_probe(struct platform_device *pdev)
 	state = iio_priv(indio_dev);
 	for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++) {
 		/* Common part */
-		cros_ec_core_channel_init(state->core.channels, i + 1);
-		state->core.channels[i + 1].info_mask_separate =
+		cros_ec_core_channel_init(state->channels, i + 1);
+		state->channels[i + 1].info_mask_separate =
 			BIT(IIO_CHAN_INFO_RAW) |
 			BIT(IIO_CHAN_INFO_CALIBBIAS);
-		state->core.channels[i + 1].info_mask_shared_by_all =
+		state->channels[i + 1].info_mask_shared_by_all =
 			BIT(IIO_CHAN_INFO_SCALE) |
 			BIT(IIO_CHAN_INFO_FREQUENCY) |
 			BIT(IIO_CHAN_INFO_SAMP_FREQ);
-		state->core.channels[i + 1].scan_index = i;
-		state->core.channels[i + 1].modified = 1;
-		state->core.channels[i + 1].channel2 = IIO_MOD_X + i;
-		state->core.channels[i + 1].scan_type.sign = 's';
+		state->channels[i + 1].scan_index = i;
+		state->channels[i + 1].modified = 1;
+		state->channels[i + 1].channel2 = IIO_MOD_X + i;
+		state->channels[i + 1].scan_type.sign = 's';
 
 		/* Sensor specific */
-		switch (state->core.type) {
+		switch (state->type) {
 		case MOTIONSENSE_TYPE_ACCEL:
-			state->core.channels[i + 1].type = IIO_ACCEL;
+			state->channels[i + 1].type = IIO_ACCEL;
 			break;
 		case MOTIONSENSE_TYPE_GYRO:
-			state->core.channels[i + 1].type = IIO_ANGL_VEL;
+			state->channels[i + 1].type = IIO_ANGL_VEL;
 			break;
 		case MOTIONSENSE_TYPE_MAG:
-			state->core.channels[i + 1].type = IIO_MAGN;
+			state->channels[i + 1].type = IIO_MAGN;
 			break;
 		default:
 			dev_err(&pdev->dev, "Unknown motion sensor\n");
 			return -EINVAL;
 		}
 	}
-	state->core.channels[0].scan_index = CROS_EC_SENSOR_MAX_AXIS;
+	state->channels[0].scan_index = CROS_EC_SENSOR_MAX_AXIS;
 
-	state->core.info.read_raw = &cros_ec_sensors_read;
-	state->core.info.write_raw = &cros_ec_sensors_write;
+	state->info.read_raw = &cros_ec_sensors_read;
+	state->info.write_raw = &cros_ec_sensors_write;
 
 	/* There is only enough room for accel and gyro in the io space */
-	if ((state->core.ec->cmd_readmem != NULL) &&
-	    (state->core.type != MOTIONSENSE_TYPE_MAG))
-		state->core.read_ec_sensors_data = cros_ec_sensors_read_lpc;
+	if ((state->ec->cmd_readmem != NULL) &&
+	    (state->type != MOTIONSENSE_TYPE_MAG))
+		state->read_ec_sensors_data = cros_ec_sensors_read_lpc;
 	else
-		state->core.read_ec_sensors_data = cros_ec_sensors_read_cmd;
+		state->read_ec_sensors_data = cros_ec_sensors_read_cmd;
 
 	return cros_ec_sensors_core_register(pdev, indio_dev);
 }
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index 3880849c5cca..57034e212fe1 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -27,7 +27,6 @@ static char *cros_ec_loc[] = {
 };
 
 int cros_ec_sensors_core_init(struct platform_device *pdev,
-			      int sizeof_priv,
 			      int num_channels,
 			      bool physical_device)
 {
@@ -40,7 +39,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
 	if (num_channels > CROS_EC_SENSORS_CORE_MAX_CHANNELS)
 		return -EINVAL;
 
-	indio_dev = devm_iio_device_alloc(dev, sizeof_priv);
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*state));
 	if (!indio_dev)
 		return -ENOMEM;
 
diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c
index 73f5dcbda0d5..6e1075dc6458 100644
--- a/drivers/iio/light/cros_ec_light_prox.c
+++ b/drivers/iio/light/cros_ec_light_prox.c
@@ -27,23 +27,17 @@
  */
 #define CROS_EC_LIGHT_PROX_MAX_CHANNELS (1 + 1)
 
-/* State data for ec_sensors iio driver. */
-struct cros_ec_light_prox_state {
-	/* Shared by all sensors */
-	struct cros_ec_sensors_core_state core;
-};
-
 static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
 				   struct iio_chan_spec const *chan,
 				   int *val, int *val2, long mask)
 {
-	struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
 	u16 data = 0;
 	s64 val64;
 	int ret = IIO_VAL_INT;
 	int idx = chan->scan_index;
 
-	mutex_lock(&st->core.cmd_lock);
+	mutex_lock(&st->cmd_lock);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
@@ -77,18 +71,18 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
 		}
 		break;
 	case IIO_CHAN_INFO_CALIBBIAS:
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
-		st->core.param.sensor_offset.flags = 0;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
+		st->param.sensor_offset.flags = 0;
 
-		if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
+		if (cros_ec_motion_send_host_cmd(st, 0)) {
 			ret = -EIO;
 			break;
 		}
 
 		/* Save values */
-		st->core.calib[0] = st->core.resp->sensor_offset.offset[0];
+		st->calib[0] = st->resp->sensor_offset.offset[0];
 
-		*val = st->core.calib[idx];
+		*val = st->calib[idx];
 		break;
 	case IIO_CHAN_INFO_CALIBSCALE:
 		/*
@@ -96,26 +90,26 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
 		 * scale is a number x.y, where x is coded on 16 bits,
 		 * y coded on 16 bits, between 0 and 9999.
 		 */
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
-		st->core.param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+		st->param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
 
-		if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
+		if (cros_ec_motion_send_host_cmd(st, 0)) {
 			ret = -EIO;
 			break;
 		}
 
-		val64 = st->core.resp->sensor_range.ret;
+		val64 = st->resp->sensor_range.ret;
 		*val = val64 >> 16;
 		*val2 = (val64 & 0xffff) * 100;
 		ret = IIO_VAL_INT_PLUS_MICRO;
 		break;
 	default:
-		ret = cros_ec_sensors_core_read(&st->core, chan, val, val2,
+		ret = cros_ec_sensors_core_read(st, chan, val, val2,
 						mask);
 		break;
 	}
 
-	mutex_unlock(&st->core.cmd_lock);
+	mutex_unlock(&st->cmd_lock);
 
 	return ret;
 }
@@ -124,37 +118,37 @@ static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
 			       struct iio_chan_spec const *chan,
 			       int val, int val2, long mask)
 {
-	struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
 	int ret = 0;
 	int idx = chan->scan_index;
 
-	mutex_lock(&st->core.cmd_lock);
+	mutex_lock(&st->cmd_lock);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_CALIBBIAS:
-		st->core.calib[idx] = val;
+		st->calib[idx] = val;
 		/* Send to EC for each axis, even if not complete */
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
-		st->core.param.sensor_offset.flags = MOTION_SENSE_SET_OFFSET;
-		st->core.param.sensor_offset.offset[0] = st->core.calib[0];
-		st->core.param.sensor_offset.temp =
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
+		st->param.sensor_offset.flags = MOTION_SENSE_SET_OFFSET;
+		st->param.sensor_offset.offset[0] = st->calib[0];
+		st->param.sensor_offset.temp =
 					EC_MOTION_SENSE_INVALID_CALIB_TEMP;
-		if (cros_ec_motion_send_host_cmd(&st->core, 0))
+		if (cros_ec_motion_send_host_cmd(st, 0))
 			ret = -EIO;
 		break;
 	case IIO_CHAN_INFO_CALIBSCALE:
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
-		st->core.param.sensor_range.data = (val << 16) | (val2 / 100);
-		if (cros_ec_motion_send_host_cmd(&st->core, 0))
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+		st->param.sensor_range.data = (val << 16) | (val2 / 100);
+		if (cros_ec_motion_send_host_cmd(st, 0))
 			ret = -EIO;
 		break;
 	default:
-		ret = cros_ec_sensors_core_write(&st->core, chan, val, val2,
+		ret = cros_ec_sensors_core_write(st, chan, val, val2,
 						 mask);
 		break;
 	}
 
-	mutex_unlock(&st->core.cmd_lock);
+	mutex_unlock(&st->cmd_lock);
 
 	return ret;
 }
@@ -164,7 +158,7 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
 	struct iio_dev *indio_dev;
-	struct cros_ec_light_prox_state *state;
+	struct cros_ec_sensors_core_state *state;
 	int ret;
 
 	if (!ec_dev || !ec_dev->ec_dev) {
@@ -172,36 +166,35 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	ret = cros_ec_sensors_core_init(pdev, sizeof(*state),
-					CROS_EC_LIGHT_PROX_MAX_CHANNELS, true);
+	ret = cros_ec_sensors_core_init(pdev, CROS_EC_LIGHT_PROX_MAX_CHANNELS, true);
 	if (ret)
 		return ret;
 
 	indio_dev = platform_get_drvdata(pdev);
 	state = iio_priv(indio_dev);
-	state->core.info.read_raw = &cros_ec_light_prox_read;
-	state->core.info.write_raw = &cros_ec_light_prox_write;
+	state->info.read_raw = &cros_ec_light_prox_read;
+	state->info.write_raw = &cros_ec_light_prox_write;
 
 	/* Common part */
-	cros_ec_core_channel_init(state->core.channels, 1);
-	state->core.channels[1].info_mask_shared_by_all =
+	cros_ec_core_channel_init(state->channels, 1);
+	state->channels[1].info_mask_shared_by_all =
 		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 		BIT(IIO_CHAN_INFO_FREQUENCY);
 
-	state->core.calib[0] = 0;
+	state->calib[0] = 0;
 
 	/* Sensor specific */
-	switch (state->core.type) {
+	switch (state->type) {
 	case MOTIONSENSE_TYPE_LIGHT:
-		state->core.channels[1].type = IIO_LIGHT;
-		state->core.channels[1].info_mask_separate =
+		state->channels[1].type = IIO_LIGHT;
+		state->channels[1].info_mask_separate =
 			BIT(IIO_CHAN_INFO_PROCESSED) |
 			BIT(IIO_CHAN_INFO_CALIBBIAS) |
 			BIT(IIO_CHAN_INFO_CALIBSCALE);
 		break;
 	case MOTIONSENSE_TYPE_PROX:
-		state->core.channels[1].type = IIO_PROXIMITY;
-		state->core.channels[1].info_mask_separate =
+		state->channels[1].type = IIO_PROXIMITY;
+		state->channels[1].info_mask_separate =
 			BIT(IIO_CHAN_INFO_RAW) |
 			BIT(IIO_CHAN_INFO_CALIBBIAS) |
 			BIT(IIO_CHAN_INFO_CALIBSCALE);
@@ -211,7 +204,7 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	state->core.read_ec_sensors_data = cros_ec_sensors_read_cmd;
+	state->read_ec_sensors_data = cros_ec_sensors_read_cmd;
 
 	return cros_ec_sensors_core_register(pdev, indio_dev);
 }
diff --git a/drivers/iio/pressure/cros_ec_baro.c b/drivers/iio/pressure/cros_ec_baro.c
index f8107a8b8e72..a2703771a6d1 100644
--- a/drivers/iio/pressure/cros_ec_baro.c
+++ b/drivers/iio/pressure/cros_ec_baro.c
@@ -25,22 +25,16 @@
  */
 #define CROS_EC_BARO_MAX_CHANNELS (1 + 1)
 
-/* State data for ec_sensors iio driver. */
-struct cros_ec_baro_state {
-	/* Shared by all sensors */
-	struct cros_ec_sensors_core_state core;
-};
-
 static int cros_ec_baro_read(struct iio_dev *indio_dev,
 			     struct iio_chan_spec const *chan,
 			     int *val, int *val2, long mask)
 {
-	struct cros_ec_baro_state *st = iio_priv(indio_dev);
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
 	u16 data = 0;
 	int ret = IIO_VAL_INT;
 	int idx = chan->scan_index;
 
-	mutex_lock(&st->core.cmd_lock);
+	mutex_lock(&st->cmd_lock);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
@@ -50,26 +44,26 @@ static int cros_ec_baro_read(struct iio_dev *indio_dev,
 		*val = data;
 		break;
 	case IIO_CHAN_INFO_SCALE:
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
-		st->core.param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+		st->param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
 
-		if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
+		if (cros_ec_motion_send_host_cmd(st, 0)) {
 			ret = -EIO;
 			break;
 		}
-		*val = st->core.resp->sensor_range.ret;
+		*val = st->resp->sensor_range.ret;
 
 		/* scale * in_pressure_raw --> kPa */
 		*val2 = 10 << CROS_EC_SENSOR_BITS;
 		ret = IIO_VAL_FRACTIONAL;
 		break;
 	default:
-		ret = cros_ec_sensors_core_read(&st->core, chan, val, val2,
+		ret = cros_ec_sensors_core_read(st, chan, val, val2,
 						mask);
 		break;
 	}
 
-	mutex_unlock(&st->core.cmd_lock);
+	mutex_unlock(&st->cmd_lock);
 
 	return ret;
 }
@@ -78,29 +72,28 @@ static int cros_ec_baro_write(struct iio_dev *indio_dev,
 			      struct iio_chan_spec const *chan,
 			      int val, int val2, long mask)
 {
-	struct cros_ec_baro_state *st = iio_priv(indio_dev);
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
 	int ret = 0;
 
-	mutex_lock(&st->core.cmd_lock);
+	mutex_lock(&st->cmd_lock);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
-		st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
-		st->core.param.sensor_range.data = val;
+		st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+		st->param.sensor_range.data = val;
 
 		/* Always roundup, so caller gets at least what it asks for. */
-		st->core.param.sensor_range.roundup = 1;
+		st->param.sensor_range.roundup = 1;
 
-		if (cros_ec_motion_send_host_cmd(&st->core, 0))
+		if (cros_ec_motion_send_host_cmd(st, 0))
 			ret = -EIO;
 		break;
 	default:
-		ret = cros_ec_sensors_core_write(&st->core, chan, val, val2,
-						 mask);
+		ret = cros_ec_sensors_core_write(st, chan, val, val2, mask);
 		break;
 	}
 
-	mutex_unlock(&st->core.cmd_lock);
+	mutex_unlock(&st->cmd_lock);
 
 	return ret;
 }
@@ -110,7 +103,7 @@ static int cros_ec_baro_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
 	struct iio_dev *indio_dev;
-	struct cros_ec_baro_state *state;
+	struct cros_ec_sensors_core_state *state;
 	int ret;
 
 	if (!ec_dev || !ec_dev->ec_dev) {
@@ -118,37 +111,36 @@ static int cros_ec_baro_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	ret = cros_ec_sensors_core_init(pdev, sizeof(*state),
-					CROS_EC_BARO_MAX_CHANNELS, true);
+	ret = cros_ec_sensors_core_init(pdev, CROS_EC_BARO_MAX_CHANNELS, true);
 	if (ret)
 		return ret;
 
 	indio_dev = platform_get_drvdata(pdev);
 	state = iio_priv(indio_dev);
-	state->core.info.read_raw = &cros_ec_baro_read;
-	state->core.info.write_raw = &cros_ec_baro_write;
+	state->info.read_raw = &cros_ec_baro_read;
+	state->info.write_raw = &cros_ec_baro_write;
 
 	/* Common part */
-	cros_ec_core_channel_init(state->core.channels, 1);
-	state->core.channels[1].info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
-	state->core.channels[1].info_mask_shared_by_all =
+	cros_ec_core_channel_init(state->channels, 1);
+	state->channels[1].info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+	state->channels[1].info_mask_shared_by_all =
 		BIT(IIO_CHAN_INFO_SCALE) |
 		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 		BIT(IIO_CHAN_INFO_FREQUENCY);
 
-	state->core.calib[0] = 0;
+	state->calib[0] = 0;
 
 	/* Sensor specific */
-	switch (state->core.type) {
+	switch (state->type) {
 	case MOTIONSENSE_TYPE_BARO:
-		state->core.channels[1].type = IIO_PRESSURE;
+		state->channels[1].type = IIO_PRESSURE;
 		break;
 	default:
 		dev_warn(dev, "Unknown motion sensor\n");
 		return -EINVAL;
 	}
 
-	state->core.read_ec_sensors_data = cros_ec_sensors_read_cmd;
+	state->read_ec_sensors_data = cros_ec_sensors_read_cmd;
 
 	return cros_ec_sensors_core_register(pdev, indio_dev);
 }
diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h
index 60f40d253f4a..3e6de427076e 100644
--- a/include/linux/iio/common/cros_ec_sensors_core.h
+++ b/include/linux/iio/common/cros_ec_sensors_core.h
@@ -105,14 +105,13 @@ struct platform_device;
 /**
  * cros_ec_sensors_core_init() - basic initialization of the core structure
  * @pdev:		platform device created for the sensors
- * @sizeof_priv:	size of the private structure
  * @num_channels:	Number of channel
  * @physical_device:	true if the device refers to a physical device
  *
  * Return: 0 on success, -errno on failure.
  */
 int cros_ec_sensors_core_init(struct platform_device *pdev,
-			      int sizeof_priv, int num_channels,
+			      int num_channels,
 			      bool physical_device);
 
 /**
-- 
2.20.1

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