iio: core: move @id from struct iio_dev to struct iio_dev_opaque

Continuing from Alexandru Ardelean's introduction of the split between
driver modifiable fields and those that should only be set by the core.

This could have been done in two steps to make the actual move after
introducing iio_device_id() but there seemed limited point to that
given how mechanical the majority of the patch is.

Includes fixup from Alex for missing mxs-lradc-adc conversion.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210426174911.397061-2-jic23@kernel.org

51 files changed, 89 insertions, 60 deletions

diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index 9c9a896a872a..fc9592407717 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -1223,14 +1223,14 @@ int adxl372_probe(struct device *dev, struct regmap *regmap,
 		st->dready_trig = devm_iio_trigger_alloc(dev,
 							 "%s-dev%d",
 							 indio_dev->name,
-							 indio_dev->id);
+							 iio_device_id(indio_dev));
 		if (st->dready_trig == NULL)
 			return -ENOMEM;
 
 		st->peak_datardy_trig = devm_iio_trigger_alloc(dev,
 							       "%s-dev%d-peak",
 							       indio_dev->name,
-							       indio_dev->id);
+							       iio_device_id(indio_dev));
 		if (!st->peak_datardy_trig)
 			return -ENOMEM;
 
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index b8a7469cdae4..68d91a70de03 100644
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -1045,7 +1045,7 @@ static int bma180_probe(struct i2c_client *client,
 
 	if (client->irq > 0) {
 		data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
-			indio_dev->id);
+					       iio_device_id(indio_dev));
 		if (!data->trig) {
 			ret = -ENOMEM;
 			goto err_chip_disable;
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index 04d85ce34e9f..62a164a7b852 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -1470,9 +1470,9 @@ static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev,
 		struct bmc150_accel_trigger *t = &data->triggers[i];
 
 		t->indio_trig = devm_iio_trigger_alloc(dev,
-					bmc150_accel_triggers[i].name,
+						       bmc150_accel_triggers[i].name,
 						       indio_dev->name,
-						       indio_dev->id);
+						       iio_device_id(indio_dev));
 		if (!t->indio_trig) {
 			ret = -ENOMEM;
 			break;
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
index ff724bc17a45..283e6a3feffc 100644
--- a/drivers/iio/accel/kxcjk-1013.c
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -1404,7 +1404,7 @@ static int kxcjk1013_probe(struct i2c_client *client,
 		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
 							   "%s-dev%d",
 							   indio_dev->name,
-							   indio_dev->id);
+							   iio_device_id(indio_dev));
 		if (!data->dready_trig) {
 			ret = -ENOMEM;
 			goto err_poweroff;
@@ -1413,7 +1413,7 @@ static int kxcjk1013_probe(struct i2c_client *client,
 		data->motion_trig = devm_iio_trigger_alloc(&client->dev,
 							  "%s-any-motion-dev%d",
 							  indio_dev->name,
-							  indio_dev->id);
+							  iio_device_id(indio_dev));
 		if (!data->motion_trig) {
 			ret = -ENOMEM;
 			goto err_poweroff;
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 4d307dfb9169..464a6bfe6746 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1461,7 +1461,7 @@ static int mma8452_trigger_setup(struct iio_dev *indio_dev)
 
 	trig = devm_iio_trigger_alloc(&data->client->dev, "%s-dev%d",
 				      indio_dev->name,
-				      indio_dev->id);
+				      iio_device_id(indio_dev));
 	if (!trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/accel/mxc4005.c b/drivers/iio/accel/mxc4005.c
index fb3cbaa62bd8..98c7f5f59011 100644
--- a/drivers/iio/accel/mxc4005.c
+++ b/drivers/iio/accel/mxc4005.c
@@ -433,7 +433,7 @@ static int mxc4005_probe(struct i2c_client *client,
 		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
 							   "%s-dev%d",
 							   indio_dev->name,
-							   indio_dev->id);
+							   iio_device_id(indio_dev));
 		if (!data->dready_trig)
 			return -ENOMEM;
 
diff --git a/drivers/iio/accel/stk8312.c b/drivers/iio/accel/stk8312.c
index 60aecfa9fd92..aeab108c457d 100644
--- a/drivers/iio/accel/stk8312.c
+++ b/drivers/iio/accel/stk8312.c
@@ -552,7 +552,7 @@ static int stk8312_probe(struct i2c_client *client,
 		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
 							   "%s-dev%d",
 							   indio_dev->name,
-							   indio_dev->id);
+							   iio_device_id(indio_dev));
 		if (!data->dready_trig) {
 			ret = -ENOMEM;
 			goto err_power_off;
diff --git a/drivers/iio/accel/stk8ba50.c b/drivers/iio/accel/stk8ba50.c
index 7cf9cb7e8666..3e7cf23be7e1 100644
--- a/drivers/iio/accel/stk8ba50.c
+++ b/drivers/iio/accel/stk8ba50.c
@@ -448,7 +448,7 @@ static int stk8ba50_probe(struct i2c_client *client,
 		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
 							   "%s-dev%d",
 							   indio_dev->name,
-							   indio_dev->id);
+							   iio_device_id(indio_dev));
 		if (!data->dready_trig) {
 			ret = -ENOMEM;
 			goto err_power_off;
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 0af0bb4d5a7f..0a60ecc69d38 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -663,7 +663,8 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 	}
 
 	st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
-					  indio_dev->name, indio_dev->id);
+					  indio_dev->name,
+					  iio_device_id(indio_dev));
 	if (!st->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/adc/ad7766.c b/drivers/iio/adc/ad7766.c
index 1e41759f3ee5..236a455aaa18 100644
--- a/drivers/iio/adc/ad7766.c
+++ b/drivers/iio/adc/ad7766.c
@@ -248,7 +248,8 @@ static int ad7766_probe(struct spi_device *spi)
 
 	if (spi->irq > 0) {
 		ad7766->trig = devm_iio_trigger_alloc(&spi->dev, "%s-dev%d",
-			indio_dev->name, indio_dev->id);
+						      indio_dev->name,
+						      iio_device_id(indio_dev));
 		if (!ad7766->trig)
 			return -ENOMEM;
 
diff --git a/drivers/iio/adc/ad7768-1.c b/drivers/iio/adc/ad7768-1.c
index c945f1349623..41752777e96c 100644
--- a/drivers/iio/adc/ad7768-1.c
+++ b/drivers/iio/adc/ad7768-1.c
@@ -626,7 +626,8 @@ static int ad7768_probe(struct spi_device *spi)
 	}
 
 	st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-dev%d",
-					  indio_dev->name, indio_dev->id);
+					  indio_dev->name,
+					  iio_device_id(indio_dev));
 	if (!st->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index e777ec718973..69b979331ccd 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -477,7 +477,7 @@ static int ad_sd_probe_trigger(struct iio_dev *indio_dev)
 
 	sigma_delta->trig = iio_trigger_alloc(&sigma_delta->spi->dev,
 					      "%s-dev%d", indio_dev->name,
-					      indio_dev->id);
+					      iio_device_id(indio_dev));
 	if (sigma_delta->trig == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index a7826f097b95..6e8c28675947 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -997,7 +997,7 @@ static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *indio,
 	int ret;
 
 	trig = devm_iio_trigger_alloc(&indio->dev, "%s-dev%d-%s", indio->name,
-				      indio->id, trigger_name);
+				iio_device_id(indio), trigger_name);
 	if (!trig)
 		return NULL;
 
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 0b5f0c91d0d7..5a7d3a3a5fa8 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -547,7 +547,7 @@ static int at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
 		char *name = kasprintf(GFP_KERNEL,
 				"%s-dev%d-%s",
 				idev->name,
-				idev->id,
+				iio_device_id(idev),
 				triggers[i].name);
 		if (!name)
 			return -ENOMEM;
@@ -626,7 +626,7 @@ static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *idev,
 	int ret;
 
 	trig = iio_trigger_alloc(idev->dev.parent, "%s-dev%d-%s", idev->name,
-				 idev->id, trigger->name);
+				 iio_device_id(idev), trigger->name);
 	if (trig == NULL)
 		return NULL;
 
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
index 0d53ef18e045..16407664182c 100644
--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -649,7 +649,8 @@ static int dln2_adc_probe(struct platform_device *pdev)
 	indio_dev->setup_ops = &dln2_adc_buffer_setup_ops;
 
 	dln2->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
-					    indio_dev->name, indio_dev->id);
+					    indio_dev->name,
+					    iio_device_id(indio_dev));
 	if (!dln2->trig) {
 		dev_err(dev, "failed to allocate trigger\n");
 		return -ENOMEM;
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index 2ae54258b221..a4b2ff9e0dd5 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -843,7 +843,8 @@ static int ina2xx_buffer_enable(struct iio_dev *indio_dev)
 		chip->allow_async_readout);
 
 	task = kthread_create(ina2xx_capture_thread, (void *)indio_dev,
-			      "%s:%d-%uus", indio_dev->name, indio_dev->id,
+			      "%s:%d-%uus", indio_dev->name,
+			      iio_device_id(indio_dev),
 			      sampling_us);
 	if (IS_ERR(task))
 		return PTR_ERR(task);
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index 30e29f44ebd2..1d99170d3328 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -455,7 +455,7 @@ static int mxs_lradc_adc_trigger_init(struct iio_dev *iio)
 	struct mxs_lradc_adc *adc = iio_priv(iio);
 
 	trig = devm_iio_trigger_alloc(&iio->dev, "%s-dev%i", iio->name,
-				      iio->id);
+				      iio_device_id(iio));
 	if (!trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/adc/ti-ads131e08.c b/drivers/iio/adc/ti-ads131e08.c
index 2c20dbed8ada..0c2025a22575 100644
--- a/drivers/iio/adc/ti-ads131e08.c
+++ b/drivers/iio/adc/ti-ads131e08.c
@@ -849,7 +849,7 @@ static int ads131e08_probe(struct spi_device *spi)
 	}
 
 	st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-dev%d",
-		indio_dev->name, indio_dev->id);
+		indio_dev->name, iio_device_id(indio_dev));
 	if (!st->trig) {
 		dev_err(&spi->dev, "failed to allocate IIO trigger\n");
 		return -ENOMEM;
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 6914c1900ed0..198d2916266d 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -743,7 +743,7 @@ static struct iio_trigger *xadc_alloc_trigger(struct iio_dev *indio_dev,
 	int ret;
 
 	trig = devm_iio_trigger_alloc(dev, "%s%d-%s", indio_dev->name,
-				      indio_dev->id, name);
+				      iio_device_id(indio_dev), name);
 	if (trig == NULL)
 		return ERR_PTR(-ENOMEM);
 
diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c
index ebb4520ac291..f77c4538141e 100644
--- a/drivers/iio/buffer/industrialio-triggered-buffer.c
+++ b/drivers/iio/buffer/industrialio-triggered-buffer.c
@@ -56,7 +56,7 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev,
 						 indio_dev,
 						 "%s_consumer%d",
 						 indio_dev->name,
-						 indio_dev->id);
+						 iio_device_id(indio_dev));
 	if (indio_dev->pollfunc == NULL) {
 		ret = -ENOMEM;
 		goto error_kfifo_free;
diff --git a/drivers/iio/chemical/atlas-sensor.c b/drivers/iio/chemical/atlas-sensor.c
index 56ba6c82b501..d10f921b233a 100644
--- a/drivers/iio/chemical/atlas-sensor.c
+++ b/drivers/iio/chemical/atlas-sensor.c
@@ -640,7 +640,7 @@ static int atlas_probe(struct i2c_client *client,
 	indio_dev->modes = INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE;
 
 	trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
-				      indio_dev->name, indio_dev->id);
+				      indio_dev->name, iio_device_id(indio_dev));
 
 	if (!trig)
 		return -ENOMEM;
diff --git a/drivers/iio/chemical/ccs811.c b/drivers/iio/chemical/ccs811.c
index 886e96496dbf..847194fa1e46 100644
--- a/drivers/iio/chemical/ccs811.c
+++ b/drivers/iio/chemical/ccs811.c
@@ -491,7 +491,7 @@ static int ccs811_probe(struct i2c_client *client,
 		data->drdy_trig = devm_iio_trigger_alloc(&client->dev,
 							 "%s-dev%d",
 							 indio_dev->name,
-							 indio_dev->id);
+							 iio_device_id(indio_dev));
 		if (!data->drdy_trig) {
 			ret = -ENOMEM;
 			goto err_poweroff;
diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c
index d89f117dd0ef..9fe6bbe9ee04 100644
--- a/drivers/iio/chemical/scd30_core.c
+++ b/drivers/iio/chemical/scd30_core.c
@@ -640,7 +640,8 @@ static int scd30_setup_trigger(struct iio_dev *indio_dev)
 	struct iio_trigger *trig;
 	int ret;
 
-	trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, indio_dev->id);
+	trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
+				      iio_device_id(indio_dev));
 	if (!trig) {
 		dev_err(dev, "failed to allocate trigger\n");
 		return -ENOMEM;
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 95ddccb44f1c..5a7b3e253e58 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -256,7 +256,7 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
 	}
 
 	trig = iio_trigger_alloc(indio_dev->dev.parent,
-				 "%s-dev%d", name, indio_dev->id);
+				 "%s-dev%d", name, iio_device_id(indio_dev));
 	if (trig == NULL) {
 		dev_err(&indio_dev->dev, "Trigger Allocate Failed\n");
 		ret = -ENOMEM;
diff --git a/drivers/iio/gyro/adxrs290.c b/drivers/iio/gyro/adxrs290.c
index cec5e1f17c22..3e0734ddafe3 100644
--- a/drivers/iio/gyro/adxrs290.c
+++ b/drivers/iio/gyro/adxrs290.c
@@ -589,7 +589,7 @@ static int adxrs290_probe_trigger(struct iio_dev *indio_dev)
 
 	st->dready_trig = devm_iio_trigger_alloc(&st->spi->dev, "%s-dev%d",
 						 indio_dev->name,
-						 indio_dev->id);
+						 iio_device_id(indio_dev));
 	if (!st->dready_trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c
index b11ebd9bb7a4..26a9ed5770c6 100644
--- a/drivers/iio/gyro/bmg160_core.c
+++ b/drivers/iio/gyro/bmg160_core.c
@@ -1137,14 +1137,14 @@ int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
 		data->dready_trig = devm_iio_trigger_alloc(dev,
 							   "%s-dev%d",
 							   indio_dev->name,
-							   indio_dev->id);
+							   iio_device_id(indio_dev));
 		if (!data->dready_trig)
 			return -ENOMEM;
 
 		data->motion_trig = devm_iio_trigger_alloc(dev,
 							  "%s-any-motion-dev%d",
 							  indio_dev->name,
-							  indio_dev->id);
+							  iio_device_id(indio_dev));
 		if (!data->motion_trig)
 			return -ENOMEM;
 
diff --git a/drivers/iio/gyro/fxas21002c_core.c b/drivers/iio/gyro/fxas21002c_core.c
index 1a20c6b88e7d..5af7b48ff01a 100644
--- a/drivers/iio/gyro/fxas21002c_core.c
+++ b/drivers/iio/gyro/fxas21002c_core.c
@@ -852,7 +852,7 @@ static int fxas21002c_trigger_probe(struct fxas21002c_data *data)
 
 	data->dready_trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
 						   indio_dev->name,
-						   indio_dev->id);
+						   iio_device_id(indio_dev));
 	if (!data->dready_trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/gyro/itg3200_buffer.c b/drivers/iio/gyro/itg3200_buffer.c
index af0aaa146f0c..04dd6a7969ea 100644
--- a/drivers/iio/gyro/itg3200_buffer.c
+++ b/drivers/iio/gyro/itg3200_buffer.c
@@ -114,7 +114,7 @@ int itg3200_probe_trigger(struct iio_dev *indio_dev)
 	struct itg3200 *st = iio_priv(indio_dev);
 
 	st->trig = iio_trigger_alloc(&st->i2c->dev, "%s-dev%d", indio_dev->name,
-				     indio_dev->id);
+				     iio_device_id(indio_dev));
 	if (!st->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/gyro/mpu3050-core.c b/drivers/iio/gyro/mpu3050-core.c
index f17a93519535..2b930c7f4d86 100644
--- a/drivers/iio/gyro/mpu3050-core.c
+++ b/drivers/iio/gyro/mpu3050-core.c
@@ -1058,7 +1058,7 @@ static int mpu3050_trigger_probe(struct iio_dev *indio_dev, int irq)
 	mpu3050->trig = devm_iio_trigger_alloc(&indio_dev->dev,
 					       "%s-dev%d",
 					       indio_dev->name,
-					       indio_dev->id);
+					       iio_device_id(indio_dev));
 	if (!mpu3050->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/health/afe4403.c b/drivers/iio/health/afe4403.c
index 1fa8d51d5080..d4921385aaf7 100644
--- a/drivers/iio/health/afe4403.c
+++ b/drivers/iio/health/afe4403.c
@@ -521,7 +521,7 @@ static int afe4403_probe(struct spi_device *spi)
 		afe->trig = devm_iio_trigger_alloc(afe->dev,
 						   "%s-dev%d",
 						   indio_dev->name,
-						   indio_dev->id);
+						   iio_device_id(indio_dev));
 		if (!afe->trig) {
 			dev_err(afe->dev, "Unable to allocate IIO trigger\n");
 			ret = -ENOMEM;
diff --git a/drivers/iio/health/afe4404.c b/drivers/iio/health/afe4404.c
index e1476bf79fe2..d8a27dfe074a 100644
--- a/drivers/iio/health/afe4404.c
+++ b/drivers/iio/health/afe4404.c
@@ -528,7 +528,7 @@ static int afe4404_probe(struct i2c_client *client,
 		afe->trig = devm_iio_trigger_alloc(afe->dev,
 						   "%s-dev%d",
 						   indio_dev->name,
-						   indio_dev->id);
+						   iio_device_id(indio_dev));
 		if (!afe->trig) {
 			dev_err(afe->dev, "Unable to allocate IIO trigger\n");
 			ret = -ENOMEM;
diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
index fa5540fabacc..48eedc29b28a 100644
--- a/drivers/iio/imu/adis_trigger.c
+++ b/drivers/iio/imu/adis_trigger.c
@@ -62,7 +62,8 @@ int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
 	int ret;
 
 	adis->trig = devm_iio_trigger_alloc(&adis->spi->dev, "%s-dev%d",
-					    indio_dev->name, indio_dev->id);
+					    indio_dev->name,
+					    iio_device_id(indio_dev));
 	if (!adis->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c
index 290b5ef83f77..b63bd7e5e5e5 100644
--- a/drivers/iio/imu/bmi160/bmi160_core.c
+++ b/drivers/iio/imu/bmi160/bmi160_core.c
@@ -785,7 +785,8 @@ int bmi160_probe_trigger(struct iio_dev *indio_dev, int irq, u32 irq_type)
 	int ret;
 
 	data->trig = devm_iio_trigger_alloc(&indio_dev->dev, "%s-dev%d",
-					    indio_dev->name, indio_dev->id);
+					    indio_dev->name,
+					    iio_device_id(indio_dev));
 
 	if (data->trig == NULL)
 		return -ENOMEM;
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
index de8ed1446d60..e21ba778595a 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
@@ -238,7 +238,7 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
 	st->trig = devm_iio_trigger_alloc(&indio_dev->dev,
 					  "%s-dev%d",
 					  indio_dev->name,
-					  indio_dev->id);
+					  iio_device_id(indio_dev));
 	if (!st->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c
index fc5a60fcfec0..d3e06ce99c1e 100644
--- a/drivers/iio/imu/kmx61.c
+++ b/drivers/iio/imu/kmx61.c
@@ -1264,7 +1264,7 @@ static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data,
 				      "%s-%s-dev%d",
 				      indio_dev->name,
 				      tag,
-				      indio_dev->id);
+				      iio_device_id(indio_dev));
 	if (!trig)
 		return ERR_PTR(-ENOMEM);
 
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 3fdcf2d4997a..ec21341c6322 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -169,6 +169,20 @@ static const char * const iio_chan_info_postfix[] = {
 	[IIO_CHAN_INFO_THERMOCOUPLE_TYPE] = "thermocouple_type",
 	[IIO_CHAN_INFO_CALIBAMBIENT] = "calibambient",
 };
+/**
+ * iio_device_id() - query the unique ID for the device
+ * @indio_dev:		Device structure whose ID is being queried
+ *
+ * The IIO device ID is a unique index used for example for the naming
+ * of the character device /dev/iio\:device[ID]
+ */
+int iio_device_id(struct iio_dev *indio_dev)
+{
+	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
+
+	return iio_dev_opaque->id;
+}
+EXPORT_SYMBOL_GPL(iio_device_id);
 
 /**
  * iio_sysfs_match_string_with_gaps - matches given string in an array with gaps
@@ -1588,7 +1602,7 @@ static void iio_dev_release(struct device *device)
 
 	iio_device_detach_buffers(indio_dev);
 
-	ida_simple_remove(&iio_ida, indio_dev->id);
+	ida_simple_remove(&iio_ida, iio_dev_opaque->id);
 	kfree(iio_dev_opaque);
 }
 
@@ -1631,14 +1645,14 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
 	mutex_init(&indio_dev->info_exist_lock);
 	INIT_LIST_HEAD(&iio_dev_opaque->channel_attr_list);
 
-	indio_dev->id = ida_simple_get(&iio_ida, 0, 0, GFP_KERNEL);
-	if (indio_dev->id < 0) {
+	iio_dev_opaque->id = ida_simple_get(&iio_ida, 0, 0, GFP_KERNEL);
+	if (iio_dev_opaque->id < 0) {
 		/* cannot use a dev_err as the name isn't available */
 		pr_err("failed to get device id\n");
 		kfree(iio_dev_opaque);
 		return NULL;
 	}
-	dev_set_name(&indio_dev->dev, "iio:device%d", indio_dev->id);
+	dev_set_name(&indio_dev->dev, "iio:device%d", iio_dev_opaque->id);
 	INIT_LIST_HEAD(&iio_dev_opaque->buffer_list);
 	INIT_LIST_HEAD(&iio_dev_opaque->ioctl_handlers);
 
@@ -1891,7 +1905,7 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
 		cdev_init(&indio_dev->chrdev, &iio_event_fileops);
 
 	if (iio_dev_opaque->attached_buffers_cnt || iio_dev_opaque->event_interface) {
-		indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), indio_dev->id);
+		indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), iio_dev_opaque->id);
 		indio_dev->chrdev.owner = this_mod;
 	}
 
diff --git a/drivers/iio/industrialio-triggered-event.c b/drivers/iio/industrialio-triggered-event.c
index 53da9ab17a62..4bedc65c9fe3 100644
--- a/drivers/iio/industrialio-triggered-event.c
+++ b/drivers/iio/industrialio-triggered-event.c
@@ -37,7 +37,7 @@ int iio_triggered_event_setup(struct iio_dev *indio_dev,
 						       indio_dev,
 						       "%s_consumer%d",
 						       indio_dev->name,
-						       indio_dev->id);
+						       iio_device_id(indio_dev));
 	if (indio_dev->pollfunc_event == NULL)
 		return -ENOMEM;
 
diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
index 0a6ab5761eec..e1ff6f524f4b 100644
--- a/drivers/iio/light/acpi-als.c
+++ b/drivers/iio/light/acpi-als.c
@@ -204,7 +204,8 @@ static int acpi_als_add(struct acpi_device *device)
 	indio_dev->channels = acpi_als_channels;
 	indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
 
-	als->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, indio_dev->id);
+	als->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
+					   iio_device_id(indio_dev));
 	if (!als->trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/light/rpr0521.c b/drivers/iio/light/rpr0521.c
index 033578f444e4..7e332de0e6a5 100644
--- a/drivers/iio/light/rpr0521.c
+++ b/drivers/iio/light/rpr0521.c
@@ -985,7 +985,7 @@ static int rpr0521_probe(struct i2c_client *client,
 		/* Trigger0 producer setup */
 		data->drdy_trigger0 = devm_iio_trigger_alloc(
 			indio_dev->dev.parent,
-			"%s-dev%d", indio_dev->name, indio_dev->id);
+			"%s-dev%d", indio_dev->name, iio_device_id(indio_dev));
 		if (!data->drdy_trigger0) {
 			ret = -ENOMEM;
 			goto err_pm_disable;
diff --git a/drivers/iio/light/si1145.c b/drivers/iio/light/si1145.c
index 9b5c99823943..3fb52402fcc3 100644
--- a/drivers/iio/light/si1145.c
+++ b/drivers/iio/light/si1145.c
@@ -1243,7 +1243,7 @@ static int si1145_probe_trigger(struct iio_dev *indio_dev)
 	int ret;
 
 	trig = devm_iio_trigger_alloc(&client->dev,
-			"%s-dev%d", indio_dev->name, indio_dev->id);
+			"%s-dev%d", indio_dev->name, iio_device_id(indio_dev));
 	if (!trig)
 		return -ENOMEM;
 
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index 2f7916f95689..4a61865d01cd 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -998,7 +998,8 @@ static int vcnl4010_probe_trigger(struct iio_dev *indio_dev)
 	struct iio_trigger *trigger;
 
 	trigger = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
-					 indio_dev->name, indio_dev->id);
+					 indio_dev->name,
+					 iio_device_id(indio_dev));
 	if (!trigger)
 		return -ENOMEM;
 
diff --git a/drivers/iio/light/vcnl4035.c b/drivers/iio/light/vcnl4035.c
index ae87740d9cef..691a54b763e1 100644
--- a/drivers/iio/light/vcnl4035.c
+++ b/drivers/iio/light/vcnl4035.c
@@ -507,7 +507,7 @@ static int vcnl4035_probe_trigger(struct iio_dev *indio_dev)
 
 	data->drdy_trigger0 = devm_iio_trigger_alloc(
 			indio_dev->dev.parent,
-			"%s-dev%d", indio_dev->name, indio_dev->id);
+			"%s-dev%d", indio_dev->name, iio_device_id(indio_dev));
 	if (!data->drdy_trigger0)
 		return -ENOMEM;
 
diff --git a/drivers/iio/magnetometer/bmc150_magn.c b/drivers/iio/magnetometer/bmc150_magn.c
index 00f9766bad5c..d75b437a43f2 100644
--- a/drivers/iio/magnetometer/bmc150_magn.c
+++ b/drivers/iio/magnetometer/bmc150_magn.c
@@ -915,7 +915,7 @@ int bmc150_magn_probe(struct device *dev, struct regmap *regmap,
 		data->dready_trig = devm_iio_trigger_alloc(dev,
 							   "%s-dev%d",
 							   indio_dev->name,
-							   indio_dev->id);
+							   iio_device_id(indio_dev));
 		if (!data->dready_trig) {
 			ret = -ENOMEM;
 			dev_err(dev, "iio trigger alloc failed\n");
diff --git a/drivers/iio/magnetometer/rm3100-core.c b/drivers/iio/magnetometer/rm3100-core.c
index dd811da9cb6d..4df5887fd04c 100644
--- a/drivers/iio/magnetometer/rm3100-core.c
+++ b/drivers/iio/magnetometer/rm3100-core.c
@@ -575,7 +575,7 @@ int rm3100_common_probe(struct device *dev, struct regmap *regmap, int irq)
 
 		data->drdy_trig = devm_iio_trigger_alloc(dev, "%s-drdy%d",
 							 indio_dev->name,
-							 indio_dev->id);
+							 iio_device_id(indio_dev));
 		if (!data->drdy_trig)
 			return -ENOMEM;
 
diff --git a/drivers/iio/potentiostat/lmp91000.c b/drivers/iio/potentiostat/lmp91000.c
index 8a9c576616ee..1948e2d22c27 100644
--- a/drivers/iio/potentiostat/lmp91000.c
+++ b/drivers/iio/potentiostat/lmp91000.c
@@ -323,7 +323,8 @@ static int lmp91000_probe(struct i2c_client *client,
 	}
 
 	data->trig = devm_iio_trigger_alloc(dev, "%s-mux%d",
-					    indio_dev->name, indio_dev->id);
+					    indio_dev->name,
+					    iio_device_id(indio_dev));
 	if (!data->trig) {
 		dev_err(dev, "cannot allocate iio trigger.\n");
 		return -ENOMEM;
diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
index a93411216aee..89295c90f801 100644
--- a/drivers/iio/pressure/zpa2326.c
+++ b/drivers/iio/pressure/zpa2326.c
@@ -1408,7 +1408,8 @@ static int zpa2326_init_managed_trigger(struct device          *parent,
 		return 0;
 
 	trigger = devm_iio_trigger_alloc(parent, "%s-dev%d",
-					 indio_dev->name, indio_dev->id);
+					 indio_dev->name,
+					 iio_device_id(indio_dev));
 	if (!trigger)
 		return -ENOMEM;
 
diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c
index edc4a35ae66d..dc20fe81232c 100644
--- a/drivers/iio/proximity/as3935.c
+++ b/drivers/iio/proximity/as3935.c
@@ -404,7 +404,8 @@ static int as3935_probe(struct spi_device *spi)
 	indio_dev->info = &as3935_info;
 
 	trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
-				      indio_dev->name, indio_dev->id);
+				      indio_dev->name,
+				      iio_device_id(indio_dev));
 
 	if (!trig)
 		return -ENOMEM;
diff --git a/drivers/iio/proximity/sx9310.c b/drivers/iio/proximity/sx9310.c
index 327ebb7ddbb9..175f3b7c61d7 100644
--- a/drivers/iio/proximity/sx9310.c
+++ b/drivers/iio/proximity/sx9310.c
@@ -1473,7 +1473,7 @@ static int sx9310_probe(struct i2c_client *client)
 
 		data->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
 						    indio_dev->name,
-						    indio_dev->id);
+						    iio_device_id(indio_dev));
 		if (!data->trig)
 			return -ENOMEM;
 
diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c
index a87f4a8e4327..3e4ddb2e8c2b 100644
--- a/drivers/iio/proximity/sx9500.c
+++ b/drivers/iio/proximity/sx9500.c
@@ -946,7 +946,7 @@ static int sx9500_probe(struct i2c_client *client,
 			return ret;
 
 		data->trig = devm_iio_trigger_alloc(&client->dev,
-				"%s-dev%d", indio_dev->name, indio_dev->id);
+				"%s-dev%d", indio_dev->name, iio_device_id(indio_dev));
 		if (!data->trig)
 			return -ENOMEM;
 
diff --git a/include/linux/iio/iio-opaque.h b/include/linux/iio/iio-opaque.h
index 32addd5e790e..e66b029d99de 100644
--- a/include/linux/iio/iio-opaque.h
+++ b/include/linux/iio/iio-opaque.h
@@ -6,6 +6,7 @@
 /**
  * struct iio_dev_opaque - industrial I/O device opaque information
  * @indio_dev:			public industrial I/O device information
+ * @id:			used to identify device internally
  * @event_interface:		event chrdevs associated with interrupt lines
  * @attached_buffers:		array of buffers statically attached by the driver
  * @attached_buffers_cnt:	number of buffers in the array of statically attached buffers
@@ -26,6 +27,7 @@
  */
 struct iio_dev_opaque {
 	struct iio_dev			indio_dev;
+	int				id;
 	struct iio_event_interface	*event_interface;
 	struct iio_buffer		**attached_buffers;
 	unsigned int			attached_buffers_cnt;
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index f2d65e2e88b6..569861d5887a 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -488,7 +488,6 @@ struct iio_buffer_setup_ops {
 
 /**
  * struct iio_dev - industrial I/O device
- * @id:			[INTERN] used to identify device internally
  * @driver_module:	[INTERN] used to make it harder to undercut users
  * @modes:		[DRIVER] operating modes supported by device
  * @currentmode:	[DRIVER] current operating mode
@@ -523,7 +522,6 @@ struct iio_buffer_setup_ops {
  *			**MUST** be accessed **ONLY** via iio_priv() helper
  */
 struct iio_dev {
-	int				id;
 	struct module			*driver_module;
 
 	int				modes;
@@ -559,6 +557,8 @@ struct iio_dev {
 	void				*priv;
 };
 
+int iio_device_id(struct iio_dev *indio_dev);
+
 const struct iio_chan_spec
 *iio_find_channel_from_si(struct iio_dev *indio_dev, int si);
 /**