Merge tag 'iio-for-5.16a-split-take4' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

First set of IIO new device and feature support for the 5.16 cycle

Counter subsystem changes now sent separately.

This has been a busy cycle, so lots here and a few more stragglers to
come next week.

Big new feature in this cycle is probably output buffer support.
This has been in the works for a very long time so it's great to see
Mihail pick up the challenge and build upon his predecessors work to finally
bring this feature to mainline.

New device support
------------------

* adi,adxl313
  - New driver and dt bindings for this low power accelerometer.
* adi,adxl355
  - New driver and dt bindings for this accelerometer.
  - Later series adds buffer support.
* asahi-kasei,ak8975
  - Minor additions to driver to support ak09916
* aspeed,aspeed-adc
  - Substantial rework plus feature additions to add support for the
    ast2600 including a new dt bindings doc.
* atmel,at91_sama5d2
  - Rework and support introduced for the sama7g5 parts.
* maxim,max31865
  - New driver and bindings for this RTD temperature sensor chip.
* nxp,imx8qxp
  - New driver and bindings for the ADC found on the i.MX 8QuadXPlus Soc.
* senseair,sunrise
  - New driver and bindings for this family of carbon dioxide gas sensors.
* sensiron,scd4x
  - New driver and bindings for this carbon dioxide gas sensor.

New features
------------

* Output buffer support.  Works in a similar fashion to input buffers, but
  in this case userspace pushes data into the kfifo which is then drained
  to the device when a trigger occurs.  Support added to the ad5766 DAC
  driver.
* Core, devm_iio_map_array_register() to avoid need for
  devm_add_action_or_reset() based cleanup in fully managed allocation
  drivers.
* Core iio_push_to_buffers_with_ts_unaligned() function to safely handle a
  few drivers where it really hard to ensure the correct data alignment in
  an iio_push_to_buffers_with_timestamp() call. Note this uses a bounce
  buffer so should be avoided whenever possible.  Used in the ti,adc108s102,
  invense,mpu3050 and adi,adis16400.  This closes the last   known set
  of drivers with alignment issues at this interface.
* maxim,max1027
  - Substantial rework to this driver main target of which was supporting
    use of other triggers than it's own EOC interrupt.
  - Transfer optimization.
* nxp,fxls8962af
  - Threshold even support including using it as a wakeup source.

Cleanups, minor fixes etc
-------------------------

Chances of a common type to multiple drivers:

* devm_ conversion and drop of .remove() callbacks in:
  - adi,ad5064
  - adi,ad7291
  - adi,ad7303
  - adi,ad7746
  - adi,ad9832
  - adi,adis16080
  - dialog,da9150-gpadc
  - intel,mrfld_adc
  - marvell,berlin2
  - maxim,max1363
  - maxim,max44000
  - nuvoton,nau7802
  - st_sensors (includes a lot of rework!)
  - ti,ads8344
  - ti,lp8788

* devm_platform_ioremap_resource() used to reduce boilerplate
  - cirrus,ep93xx
  - rockchip,saradc
  - stm,stm32-dac

* Use dev_err_probe() in more places to both not print on deferred probe and
  ensure a reason for the deferral is available for debug purposes.
  - adi,ad8801
  - capella,cm36651
  - linear,ltc1660
  - maxim,ds4424
  - maxim,max5821
  - microchip,mcp4922
  - nxp,lpc18xx
  - onnn,noa1305
  - st,lsm9ds0
  - st,st_sensors
  - st,stm32-dac
  - ti,afe4403
  - ti,afe4404
  - ti,dac7311

* Drop error returns in SPI and I2C remove() functions as they are ignored and
  long term plan is to change these all over to returning void. In some cases
  these patches just make it 'obvious' they always return 0 where it was the
  case before but not easy to tell.
  - adi,ad5380
  - adi,ad5446
  - adi,ad5686
  - adi,ad5592r
  - bosch,bma400
  - bosch,bmc150
  - fsl,mma7455
  - honeywell,hmc5843
  - kionix,kxsd9
  - maxim,max5487
  - meas,ms5611
  - ti,afe4403

Driver specific changes

* adi,ad5770r
  - Bring driver inline with documented bindings.
* adi,ad7746
  - Trivial style fix
* adi,ad7949
  - Express some magic values as the underlying parts via new #defines.
  - Make it work with SPI controllers that don't support 14 or 16 bit messages
  - Support selection of voltage reference from dt including expanding the
    dt-bindings to cover this new functionality.
* adi,ad799x
  - Implement selection of external reference voltage on AD7991, AD7995 and
    AD7999.
  - Add missing dt-bindings doc for devices supported by this driver.
* adi,adislib
  - Move interrupt startup to better location in startup flow.
  - Handle devices that cannot mask/unmask the drdy pin and must instead mask
    at the interrupt controller.  Applies to the adis16460 and adis16475 from
    which we then drop equivalent code.
* adi,ltc2983
  - Add support for optional reset pin.
  - Fail to probe if no channels specified in dt binding.
* asahi-kasei,ak8975
  - dt-binding additions of missing vid-supply regulator.
* aspeed,aspeed-adc
  - Typo fix.
* fsl,mma7660
  - Mark acpi_device_id table __maybe_unused to avoid build warning.
* fsl,imx25-gcq
  - Avoid initializing regulators that aren't used.
* invensense,mpu3050
  - Drop a dead protection against a clash with the old input driver.
* invensense,mpu6050
  - Rework code to not use strcpy() and hence avoid possibility of wrong sized
    buffers. Note this wasn't a bug, but the new code is a lot more readable.
  - Mark acpi_device_id table __maybe_unused to avoid build warning.
* kionix,kxcjk1013
  - dt-binding addition to note it supports interrupts.
* marvell,berlin2-adc
  - Enable COMPILE_TEST building.
* maxim,max1027
  - Avoid returning success in an error path.
* nxp,imx8qxp
  - Fix warning when runtime pm not enabled via __maybe_unused.
* ricoh,rn5t618
  - Use the new devm_iio_map_array_register() instead of open coding the same.
* samsung,exynos_adc
  - Improve kconfig help text.
* st,lsm6dsx
  - Move max_fifo_size into the fifo_ops structure where the other configuration
    parameters are found.
* st,st_sensors:
  - Reorder to ensure we turn the power off after removing userspace interfaces.
* senseair,sunrise
  - Add missing I2C dependency.
* ti,twl6030
  - Small code tidy up.

* tag 'iio-for-5.16a-split-take4' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (148 commits)
  iio: imx8qxp-adc: mark PM functions as __maybe_unused
  iio: pressure: ms5611: Make ms5611_remove() return void
  iio: potentiometer: max5487: Don't return an error in .remove()
  iio: magn: hmc5843: Make hmc5843_common_remove() return void
  iio: health: afe4403: Don't return an error in .remove()
  iio: dac: ad5686: Make ad5686_remove() return void
  iio: dac: ad5592r: Make ad5592r_remove() return void
  iio: dac: ad5446: Make ad5446_remove() return void
  iio: dac: ad5380: Make ad5380_remove() return void
  iio: accel: mma7455: Make mma7455_core_remove() return void
  iio: accel: kxsd9: Make kxsd9_common_remove() return void
  iio: accel: bmi088: Make bmi088_accel_core_remove() return void
  iio: accel: bmc150: Make bmc150_accel_core_remove() return void
  iio: accel: bma400: Make bma400_remove() return void
  drivers:iio:dac:ad5766.c: Add trigger buffer
  iio: triggered-buffer: extend support to configure output buffers
  iio: kfifo-buffer: Add output buffer support
  iio: Add output buffer support
  iio: documentation: Document scd4x calibration use
  drivers: iio: chemical: Add support for Sensirion SCD4x CO2 sensor
  ...

13 files changed, 77 insertions, 101 deletions

diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index b9a06ca29bee..cb0d66bf6561 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -286,6 +286,13 @@ int adis_enable_irq(struct adis *adis, bool enable)
 	if (adis->data->enable_irq) {
 		ret = adis->data->enable_irq(adis, enable);
 		goto out_unlock;
+	} else if (adis->data->unmasked_drdy) {
+		if (enable)
+			enable_irq(adis->spi->irq);
+		else
+			disable_irq(adis->spi->irq);
+
+		goto out_unlock;
 	}
 
 	ret = __adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
@@ -430,6 +437,14 @@ int __adis_initial_startup(struct adis *adis)
 	if (ret)
 		return ret;
 
+	/*
+	 * don't bother calling this if we can't unmask the IRQ as in this case
+	 * the IRQ is most likely not yet requested and we will request it
+	 * with 'IRQF_NO_AUTOEN' anyways.
+	 */
+	if (!adis->data->unmasked_drdy)
+		adis_enable_irq(adis, false);
+
 	if (!adis->data->prod_id_reg)
 		return 0;
 
@@ -526,7 +541,7 @@ int adis_init(struct adis *adis, struct iio_dev *indio_dev,
 		adis->current_page = 0;
 	}
 
-	return adis_enable_irq(adis, false);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(adis_init);
 
diff --git a/drivers/iio/imu/adis16400.c b/drivers/iio/imu/adis16400.c
index b12917a7cb60..9fd30e62d6e8 100644
--- a/drivers/iio/imu/adis16400.c
+++ b/drivers/iio/imu/adis16400.c
@@ -641,13 +641,23 @@ static irqreturn_t adis16400_trigger_handler(int irq, void *p)
 	if (ret)
 		dev_err(&adis->spi->dev, "Failed to read data: %d\n", ret);
 
-	if (st->variant->flags & ADIS16400_BURST_DIAG_STAT)
+	if (st->variant->flags & ADIS16400_BURST_DIAG_STAT) {
 		buffer = adis->buffer + sizeof(u16);
-	else
-		buffer = adis->buffer;
+		/*
+		 * The size here is always larger than, or equal to the true
+		 * size of the channel data. This may result in a larger copy
+		 * than necessary, but as the target buffer will be
+		 * buffer->scan_bytes this will be safe.
+		 */
+		iio_push_to_buffers_with_ts_unaligned(indio_dev, buffer,
+						      indio_dev->scan_bytes - sizeof(pf->timestamp),
+						      pf->timestamp);
+	} else {
+		iio_push_to_buffers_with_timestamp(indio_dev,
+						   adis->buffer,
+						   pf->timestamp);
+	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buffer,
-		pf->timestamp);
 
 	iio_trigger_notify_done(indio_dev->trig);
 
diff --git a/drivers/iio/imu/adis16460.c b/drivers/iio/imu/adis16460.c
index a6f9fba3e03f..b01988170118 100644
--- a/drivers/iio/imu/adis16460.c
+++ b/drivers/iio/imu/adis16460.c
@@ -319,20 +319,6 @@ static const struct iio_info adis16460_info = {
 	.debugfs_reg_access = adis_debugfs_reg_access,
 };
 
-static int adis16460_enable_irq(struct adis *adis, bool enable)
-{
-	/*
-	 * There is no way to gate the data-ready signal internally inside the
-	 * ADIS16460 :(
-	 */
-	if (enable)
-		enable_irq(adis->spi->irq);
-	else
-		disable_irq(adis->spi->irq);
-
-	return 0;
-}
-
 #define ADIS16460_DIAG_STAT_IN_CLK_OOS	7
 #define ADIS16460_DIAG_STAT_FLASH_MEM	6
 #define ADIS16460_DIAG_STAT_SELF_TEST	5
@@ -373,7 +359,7 @@ static const struct adis_data adis16460_data = {
 		BIT(ADIS16460_DIAG_STAT_OVERRANGE) |
 		BIT(ADIS16460_DIAG_STAT_SPI_COMM) |
 		BIT(ADIS16460_DIAG_STAT_FLASH_UPT),
-	.enable_irq = adis16460_enable_irq,
+	.unmasked_drdy = true,
 	.timeouts = &adis16460_timeouts,
 };
 
@@ -400,8 +386,6 @@ static int adis16460_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
-	/* We cannot mask the interrupt, so ensure it isn't auto enabled */
-	st->adis.irq_flag |= IRQF_NO_AUTOEN;
 	ret = devm_adis_setup_buffer_and_trigger(&st->adis, indio_dev, NULL);
 	if (ret)
 		return ret;
diff --git a/drivers/iio/imu/adis16475.c b/drivers/iio/imu/adis16475.c
index 287fff39a927..ea91d127077d 100644
--- a/drivers/iio/imu/adis16475.c
+++ b/drivers/iio/imu/adis16475.c
@@ -607,20 +607,6 @@ static const char * const adis16475_status_error_msgs[] = {
 	[ADIS16475_DIAG_STAT_CLK] = "Clock error",
 };
 
-static int adis16475_enable_irq(struct adis *adis, bool enable)
-{
-	/*
-	 * There is no way to gate the data-ready signal internally inside the
-	 * ADIS16475. We can only control it's polarity...
-	 */
-	if (enable)
-		enable_irq(adis->spi->irq);
-	else
-		disable_irq(adis->spi->irq);
-
-	return 0;
-}
-
 #define ADIS16475_DATA(_prod_id, _timeouts)				\
 {									\
 	.msc_ctrl_reg = ADIS16475_REG_MSG_CTRL,				\
@@ -641,7 +627,7 @@ static int adis16475_enable_irq(struct adis *adis, bool enable)
 		BIT(ADIS16475_DIAG_STAT_SENSOR) |			\
 		BIT(ADIS16475_DIAG_STAT_MEMORY) |			\
 		BIT(ADIS16475_DIAG_STAT_CLK),				\
-	.enable_irq = adis16475_enable_irq,				\
+	.unmasked_drdy = true,						\
 	.timeouts = (_timeouts),					\
 	.burst_reg_cmd = ADIS16475_REG_GLOB_CMD,			\
 	.burst_len = ADIS16475_BURST_MAX_DATA,				\
@@ -1255,9 +1241,6 @@ static int adis16475_config_irq_pin(struct adis16475 *st)
 		return -EINVAL;
 	}
 
-	/* We cannot mask the interrupt so ensure it's not enabled at request */
-	st->adis.irq_flag |= IRQF_NO_AUTOEN;
-
 	val = ADIS16475_MSG_CTRL_DR_POL(polarity);
 	ret = __adis_update_bits(&st->adis, ADIS16475_REG_MSG_CTRL,
 				 ADIS16475_MSG_CTRL_DR_POL_MASK, val);
diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
index 48eedc29b28a..c461bd1e8e69 100644
--- a/drivers/iio/imu/adis_trigger.c
+++ b/drivers/iio/imu/adis_trigger.c
@@ -30,6 +30,10 @@ static const struct iio_trigger_ops adis_trigger_ops = {
 static int adis_validate_irq_flag(struct adis *adis)
 {
 	unsigned long direction = adis->irq_flag & IRQF_TRIGGER_MASK;
+
+	/* We cannot mask the interrupt so ensure it's not enabled at request */
+	if (adis->data->unmasked_drdy)
+		adis->irq_flag |= IRQF_NO_AUTOEN;
 	/*
 	 * Typically this devices have data ready either on the rising edge or
 	 * on the falling edge of the data ready pin. This checks enforces that
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
index 95f16951c8f4..3ef17e3f50e2 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
@@ -249,7 +249,7 @@ static const struct of_device_id inv_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, inv_of_match);
 
-static const struct acpi_device_id inv_acpi_match[] = {
+static const struct acpi_device_id __maybe_unused inv_acpi_match[] = {
 	{"INVN6500", INV_MPU6500},
 	{ },
 };
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c
index f282e9cc34c5..6aee6c989485 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c
@@ -261,6 +261,7 @@ int inv_mpu_magn_set_rate(const struct inv_mpu6050_state *st, int fifo_rate)
  */
 int inv_mpu_magn_set_orient(struct inv_mpu6050_state *st)
 {
+	struct device *dev = regmap_get_device(st->map);
 	const char *orient;
 	char *str;
 	int i;
@@ -279,22 +280,27 @@ int inv_mpu_magn_set_orient(struct inv_mpu6050_state *st)
 		st->magn_orient.rotation[4] = st->orientation.rotation[1];
 		st->magn_orient.rotation[5] = st->orientation.rotation[2];
 		/* z <- -z */
-		for (i = 0; i < 3; ++i) {
-			orient = st->orientation.rotation[6 + i];
-			/* use length + 2 for adding minus sign if needed */
-			str = devm_kzalloc(regmap_get_device(st->map),
-					   strlen(orient) + 2, GFP_KERNEL);
-			if (str == NULL)
+		for (i = 6; i < 9; ++i) {
+			orient = st->orientation.rotation[i];
+
+			/*
+			 * The value is negated according to one of the following
+			 * rules:
+			 *
+			 * 1) Drop leading minus.
+			 * 2) Leave 0 as is.
+			 * 3) Add leading minus.
+			 */
+			if (orient[0] == '-')
+				str = devm_kstrdup(dev, orient + 1, GFP_KERNEL);
+			else if (!strcmp(orient, "0"))
+				str = devm_kstrdup(dev, orient, GFP_KERNEL);
+			else
+				str = devm_kasprintf(dev, GFP_KERNEL, "-%s", orient);
+			if (!str)
 				return -ENOMEM;
-			if (strcmp(orient, "0") == 0) {
-				strcpy(str, orient);
-			} else if (orient[0] == '-') {
-				strcpy(str, &orient[1]);
-			} else {
-				str[0] = '-';
-				strcpy(&str[1], orient);
-			}
-			st->magn_orient.rotation[6 + i] = str;
+
+			st->magn_orient.rotation[i] = str;
 		}
 		break;
 	default:
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
index 5ef55763a6cc..6ac4eac36458 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
@@ -143,6 +143,7 @@ struct st_lsm6dsx_fs_table_entry {
  * @read_fifo: Read FIFO callback.
  * @fifo_th: FIFO threshold register info (addr + mask).
  * @fifo_diff: FIFO diff status register info (addr + mask).
+ * @max_size: Sensor max fifo length in FIFO words.
  * @th_wl: FIFO threshold word length.
  */
 struct st_lsm6dsx_fifo_ops {
@@ -156,6 +157,7 @@ struct st_lsm6dsx_fifo_ops {
 		u8 addr;
 		u16 mask;
 	} fifo_diff;
+	u16 max_size;
 	u8 th_wl;
 };
 
@@ -271,7 +273,6 @@ struct st_lsm6dsx_ext_dev_settings {
  * @reset: register address for reset.
  * @boot: register address for boot.
  * @bdu: register address for Block Data Update.
- * @max_fifo_size: Sensor max fifo length in FIFO words.
  * @id: List of hw id/device name supported by the driver configuration.
  * @channels: IIO channels supported by the device.
  * @irq_config: interrupts related registers.
@@ -288,7 +289,6 @@ struct st_lsm6dsx_settings {
 	struct st_lsm6dsx_reg reset;
 	struct st_lsm6dsx_reg boot;
 	struct st_lsm6dsx_reg bdu;
-	u16 max_fifo_size;
 	struct {
 		enum st_lsm6dsx_hw_id hw_id;
 		const char *name;
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index db45f1fc0b81..0f54df85134a 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -102,7 +102,6 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			.addr = 0x22,
 			.mask = BIT(6),
 		},
-		.max_fifo_size = 32,
 		.id = {
 			{
 				.hw_id = ST_LSM9DS1_ID,
@@ -194,6 +193,9 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = BIT(4),
 			},
 		},
+		.fifo_ops = {
+			.max_size = 32,
+		},
 	},
 	{
 		.reset = {
@@ -208,7 +210,6 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			.addr = 0x12,
 			.mask = BIT(6),
 		},
-		.max_fifo_size = 1365,
 		.id = {
 			{
 				.hw_id = ST_LSM6DS3_ID,
@@ -329,6 +330,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.addr = 0x3a,
 				.mask = GENMASK(11, 0),
 			},
+			.max_size = 1365,
 			.th_wl = 3, /* 1LSB = 2B */
 		},
 		.ts_settings = {
@@ -374,7 +376,6 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			.addr = 0x12,
 			.mask = BIT(6),
 		},
-		.max_fifo_size = 682,
 		.id = {
 			{
 				.hw_id = ST_LSM6DS3H_ID,
@@ -495,6 +496,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.addr = 0x3a,
 				.mask = GENMASK(11, 0),
 			},
+			.max_size = 682,
 			.th_wl = 3, /* 1LSB = 2B */
 		},
 		.ts_settings = {
@@ -540,7 +542,6 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			.addr = 0x12,
 			.mask = BIT(6),
 		},
-		.max_fifo_size = 682,
 		.id = {
 			{
 				.hw_id = ST_LSM6DSL_ID,
@@ -677,6 +678,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.addr = 0x3a,
 				.mask = GENMASK(10, 0),
 			},
+			.max_size = 682,
 			.th_wl = 3, /* 1LSB = 2B */
 		},
 		.ts_settings = {
@@ -759,7 +761,6 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			.addr = 0x12,
 			.mask = BIT(6),
 		},
-		.max_fifo_size = 512,
 		.id = {
 			{
 				.hw_id = ST_LSM6DSR_ID,
@@ -910,6 +911,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.addr = 0x3a,
 				.mask = GENMASK(9, 0),
 			},
+			.max_size = 512,
 			.th_wl = 1,
 		},
 		.ts_settings = {
@@ -984,7 +986,6 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			.addr = 0x12,
 			.mask = BIT(6),
 		},
-		.max_fifo_size = 512,
 		.id = {
 			{
 				.hw_id = ST_ASM330LHH_ID,
@@ -1119,6 +1120,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.addr = 0x3a,
 				.mask = GENMASK(9, 0),
 			},
+			.max_size = 512,
 			.th_wl = 1,
 		},
 		.ts_settings = {
@@ -1603,7 +1605,7 @@ int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val)
 	struct st_lsm6dsx_hw *hw = sensor->hw;
 	int err;
 
-	if (val < 1 || val > hw->settings->max_fifo_size)
+	if (val < 1 || val > hw->settings->fifo_ops.max_size)
 		return -EINVAL;
 
 	mutex_lock(&hw->conf_lock);
diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0.h b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0.h
index 146393afd9a7..76678cdefb07 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0.h
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0.h
@@ -18,6 +18,5 @@ struct st_lsm9ds0 {
 };
 
 int st_lsm9ds0_probe(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap);
-int st_lsm9ds0_remove(struct st_lsm9ds0 *lsm9ds0);
 
 #endif /* ST_LSM9DS0_H */
diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c
index 5e6625140db7..9fb06b7cde3c 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c
@@ -24,10 +24,10 @@ static int st_lsm9ds0_power_enable(struct device *dev, struct st_lsm9ds0 *lsm9ds
 
 	/* Regulators not mandatory, but if requested we should enable them. */
 	lsm9ds0->vdd = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(lsm9ds0->vdd)) {
-		dev_err(dev, "unable to get Vdd supply\n");
-		return PTR_ERR(lsm9ds0->vdd);
-	}
+	if (IS_ERR(lsm9ds0->vdd))
+		return dev_err_probe(dev, PTR_ERR(lsm9ds0->vdd),
+				     "unable to get Vdd supply\n");
+
 	ret = regulator_enable(lsm9ds0->vdd);
 	if (ret) {
 		dev_warn(dev, "Failed to enable specified Vdd supply\n");
@@ -36,9 +36,9 @@ static int st_lsm9ds0_power_enable(struct device *dev, struct st_lsm9ds0 *lsm9ds
 
 	lsm9ds0->vdd_io = devm_regulator_get(dev, "vddio");
 	if (IS_ERR(lsm9ds0->vdd_io)) {
-		dev_err(dev, "unable to get Vdd_IO supply\n");
 		regulator_disable(lsm9ds0->vdd);
-		return PTR_ERR(lsm9ds0->vdd_io);
+		return dev_err_probe(dev, PTR_ERR(lsm9ds0->vdd_io),
+				     "unable to get Vdd_IO supply\n");
 	}
 	ret = regulator_enable(lsm9ds0->vdd_io);
 	if (ret) {
@@ -90,7 +90,6 @@ static int st_lsm9ds0_probe_accel(struct st_lsm9ds0 *lsm9ds0, struct regmap *reg
 
 	data = iio_priv(lsm9ds0->accel);
 	data->sensor_settings = (struct st_sensor_settings *)settings;
-	data->dev = dev;
 	data->irq = lsm9ds0->irq;
 	data->regmap = regmap;
 	data->vdd = lsm9ds0->vdd;
@@ -119,7 +118,6 @@ static int st_lsm9ds0_probe_magn(struct st_lsm9ds0 *lsm9ds0, struct regmap *regm
 
 	data = iio_priv(lsm9ds0->magn);
 	data->sensor_settings = (struct st_sensor_settings *)settings;
-	data->dev = dev;
 	data->irq = lsm9ds0->irq;
 	data->regmap = regmap;
 	data->vdd = lsm9ds0->vdd;
@@ -142,23 +140,10 @@ int st_lsm9ds0_probe(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
 		return ret;
 
 	/* Setup magnetometer device */
-	ret = st_lsm9ds0_probe_magn(lsm9ds0, regmap);
-	if (ret)
-		st_accel_common_remove(lsm9ds0->accel);
-
-	return ret;
+	return st_lsm9ds0_probe_magn(lsm9ds0, regmap);
 }
 EXPORT_SYMBOL_GPL(st_lsm9ds0_probe);
 
-int st_lsm9ds0_remove(struct st_lsm9ds0 *lsm9ds0)
-{
-	st_magn_common_remove(lsm9ds0->magn);
-	st_accel_common_remove(lsm9ds0->accel);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(st_lsm9ds0_remove);
-
 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU core driver");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
index 78bede358747..8f205c477e6f 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
@@ -64,18 +64,12 @@ static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
 	return st_lsm9ds0_probe(lsm9ds0, regmap);
 }
 
-static int st_lsm9ds0_i2c_remove(struct i2c_client *client)
-{
-	return st_lsm9ds0_remove(i2c_get_clientdata(client));
-}
-
 static struct i2c_driver st_lsm9ds0_driver = {
 	.driver = {
 		.name = "st-lsm9ds0-i2c",
 		.of_match_table = st_lsm9ds0_of_match,
 	},
 	.probe_new = st_lsm9ds0_i2c_probe,
-	.remove = st_lsm9ds0_i2c_remove,
 	.id_table = st_lsm9ds0_id_table,
 };
 module_i2c_driver(st_lsm9ds0_driver);
diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
index 180b54e66438..0ddfa53166af 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
@@ -63,18 +63,12 @@ static int st_lsm9ds0_spi_probe(struct spi_device *spi)
 	return st_lsm9ds0_probe(lsm9ds0, regmap);
 }
 
-static int st_lsm9ds0_spi_remove(struct spi_device *spi)
-{
-	return st_lsm9ds0_remove(spi_get_drvdata(spi));
-}
-
 static struct spi_driver st_lsm9ds0_driver = {
 	.driver = {
 		.name = "st-lsm9ds0-spi",
 		.of_match_table = st_lsm9ds0_of_match,
 	},
 	.probe = st_lsm9ds0_spi_probe,
-	.remove = st_lsm9ds0_spi_remove,
 	.id_table = st_lsm9ds0_id_table,
 };
 module_spi_driver(st_lsm9ds0_driver);