Merge branch 'togreg' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git

22 files changed, 650 insertions, 67 deletions

diff --git a/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml b/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml
index 7f79a06e76f5..6168b44ea72c 100644
--- a/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml
@@ -26,6 +26,7 @@ properties:
           - mediatek,mt2712-auxadc
           - mediatek,mt6765-auxadc
           - mediatek,mt7622-auxadc
+          - mediatek,mt7986-auxadc
           - mediatek,mt8173-auxadc
       - items:
           - enum:
diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
index bd6e0d6f6e0c..ad7d6fc49de5 100644
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
@@ -54,7 +54,7 @@ required:
   - '#io-channel-cells'
 
 patternProperties:
-  "^.*@[0-9a-f]+$":
+  "^channel@[0-9a-f]+$":
     type: object
     additionalProperties: false
     description: |
@@ -101,7 +101,7 @@ patternProperties:
         oneOf:
           - items:
               - const: 1
-              - enum: [ 1, 3, 4, 6, 20, 8, 10 ]
+              - enum: [ 1, 3, 4, 6, 20, 8, 10, 16 ]
           - items:
               - const: 10
               - const: 81
@@ -148,7 +148,7 @@ allOf:
 
     then:
       patternProperties:
-        "^.*@[0-9a-f]+$":
+        "^channel@[0-9a-f]+$":
           properties:
             qcom,decimation:
               enum: [ 512, 1024, 2048, 4096 ]
@@ -171,7 +171,7 @@ allOf:
 
     then:
       patternProperties:
-        "^.*@[0-9a-f]+$":
+        "^channel@[0-9a-f]+$":
           properties:
             qcom,decimation:
               enum: [ 256, 512, 1024 ]
@@ -194,7 +194,7 @@ allOf:
 
     then:
       patternProperties:
-        "^.*@[0-9a-f]+$":
+        "^channel@[0-9a-f]+$":
           properties:
             qcom,decimation:
               enum: [ 250, 420, 840 ]
@@ -217,7 +217,7 @@ allOf:
 
     then:
       patternProperties:
-        "^.*@[0-9a-f]+$":
+        "^channel@[0-9a-f]+$":
           properties:
             qcom,decimation:
               enum: [ 85, 340, 1360 ]
@@ -249,7 +249,7 @@ examples:
             #io-channel-cells = <1>;
 
             /* Channel node */
-            adc-chan@39 {
+            channel@39 {
                 reg = <0x39>;
                 qcom,decimation = <512>;
                 qcom,ratiometric;
@@ -258,19 +258,19 @@ examples:
                 qcom,pre-scaling = <1 3>;
             };
 
-            adc-chan@9 {
+            channel@9 {
                 reg = <0x9>;
             };
 
-            adc-chan@a {
+            channel@a {
                 reg = <0xa>;
             };
 
-            adc-chan@e {
+            channel@e {
                 reg = <0xe>;
             };
 
-            adc-chan@f {
+            channel@f {
                 reg = <0xf>;
             };
         };
@@ -292,16 +292,18 @@ examples:
             #io-channel-cells = <1>;
 
             /* Other properties are omitted */
-            xo-therm@44 {
+            channel@44 {
                 reg = <PMK8350_ADC7_AMUX_THM1_100K_PU>;
                 qcom,ratiometric;
                 qcom,hw-settle-time = <200>;
+                label = "xo_therm";
             };
 
-            conn-therm@47 {
+            channel@47 {
                 reg = <PM8350_ADC7_AMUX_THM4_100K_PU(1)>;
                 qcom,ratiometric;
                 qcom,hw-settle-time = <200>;
+                label = "conn_therm";
             };
         };
     };
diff --git a/Documentation/devicetree/bindings/iio/light/ti,opt4001.yaml b/Documentation/devicetree/bindings/iio/light/ti,opt4001.yaml
new file mode 100644
index 000000000000..12b0c7ed5d72
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/ti,opt4001.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/ti,opt4001.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments OPT4001 Ambient Light Sensor
+
+maintainers:
+  - Stefan Windfeldt-Prytz <stefan.windfeldt-prytz@axis.com>
+
+description:
+  Ambient light sensor with an i2c interface.
+  Last part of compatible is for the packaging used.
+  Picostar is a 4 pinned SMT and sot-5x3 is a 8 pinned SOT.
+  https://www.ti.com/lit/gpn/opt4001
+
+properties:
+  compatible:
+    enum:
+      - ti,opt4001-picostar
+      - ti,opt4001-sot-5x3
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that provides power to the sensor
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,opt4001-sot-5x3
+    then:
+      properties:
+        interrupts:
+          maxItems: 1
+    else:
+      properties:
+        interrupts: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light-sensor@44 {
+            compatible = "ti,opt4001-sot-5x3";
+            reg = <0x44>;
+            vdd-supply = <&vdd_reg>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <28 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/st,st-sensors.yaml b/Documentation/devicetree/bindings/iio/st,st-sensors.yaml
index 1ff3afca9149..e450821a741d 100644
--- a/Documentation/devicetree/bindings/iio/st,st-sensors.yaml
+++ b/Documentation/devicetree/bindings/iio/st,st-sensors.yaml
@@ -84,6 +84,7 @@ properties:
           - st,lps35hw
       - description: IMUs
         enum:
+          - st,lsm303d-imu
           - st,lsm9ds0-imu
       - description: Deprecated bindings
         enum:
diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
index a68b845f5b4f..e90e2f01550a 100644
--- a/drivers/iio/accel/bma400_core.c
+++ b/drivers/iio/accel/bma400_core.c
@@ -868,8 +868,7 @@ static int bma400_init(struct bma400_data *data)
 					     ARRAY_SIZE(regulator_names),
 					     regulator_names);
 	if (ret)
-		return dev_err_probe(data->dev, ret, "Failed to get regulators: %d\n",
-				     ret);
+		return dev_err_probe(data->dev, ret, "Failed to get regulators\n");
 
 	/* Try to read chip_id register. It must return 0x90. */
 	ret = regmap_read(data->regmap, BMA400_CHIP_ID_REG, &val);
diff --git a/drivers/iio/accel/kionix-kx022a-i2c.c b/drivers/iio/accel/kionix-kx022a-i2c.c
index e6fd02d931b6..ee982206e5dd 100644
--- a/drivers/iio/accel/kionix-kx022a-i2c.c
+++ b/drivers/iio/accel/kionix-kx022a-i2c.c
@@ -40,6 +40,7 @@ static struct i2c_driver kx022a_i2c_driver = {
 	.driver = {
 		.name  = "kx022a-i2c",
 		.of_match_table = kx022a_of_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	  },
 	.probe_new    = kx022a_i2c_probe,
 };
diff --git a/drivers/iio/accel/kionix-kx022a-spi.c b/drivers/iio/accel/kionix-kx022a-spi.c
index 9cd047f7b346..f45a46899a5f 100644
--- a/drivers/iio/accel/kionix-kx022a-spi.c
+++ b/drivers/iio/accel/kionix-kx022a-spi.c
@@ -46,6 +46,7 @@ static struct spi_driver kx022a_spi_driver = {
 	.driver = {
 		.name   = "kx022a-spi",
 		.of_match_table = kx022a_of_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe = kx022a_spi_probe,
 	.id_table = kx022a_id,
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
index 282e539157f8..d2104e14e255 100644
--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -1007,6 +1007,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LSM9DS0_IMU_DEV_NAME,
+			[1] = LSM303D_IMU_DEV_NAME,
 		},
 		.ch = (struct iio_chan_spec *)st_accel_16bit_channels,
 		.odr = {
diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index 7dfc9c927a23..27b2632c1037 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -14,7 +14,6 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
-#include <linux/i2c.h>
 #include <linux/pm.h>
 #include <linux/mfd/palmas.h>
 #include <linux/completion.h>
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index bd7e2408bf28..f7613efb870d 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -1993,6 +1993,8 @@ static int stm32_adc_get_legacy_chan_count(struct iio_dev *indio_dev, struct stm
 	const struct stm32_adc_info *adc_info = adc->cfg->adc_info;
 	int num_channels = 0, ret;
 
+	dev_dbg(&indio_dev->dev, "using legacy channel config\n");
+
 	ret = device_property_count_u32(dev, "st,adc-channels");
 	if (ret > adc_info->max_channels) {
 		dev_err(&indio_dev->dev, "Bad st,adc-channels?\n");
diff --git a/drivers/iio/imu/st_lsm9ds0/Kconfig b/drivers/iio/imu/st_lsm9ds0/Kconfig
index d29558edee60..7aef714b6ecb 100644
--- a/drivers/iio/imu/st_lsm9ds0/Kconfig
+++ b/drivers/iio/imu/st_lsm9ds0/Kconfig
@@ -10,7 +10,8 @@ config IIO_ST_LSM9DS0
 
 	help
 	  Say yes here to build support for STMicroelectronics LSM9DS0 IMU
-	  sensor. Supported devices: accelerometer/magnetometer of lsm9ds0.
+	  sensor. Supported devices: accelerometer/magnetometer of lsm9ds0
+	  and lsm303d.
 
 	  To compile this driver as a module, choose M here: the module
 	  will be called st_lsm9ds0.
diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
index a90138d8b06a..a0b9b2df11ce 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
@@ -19,6 +19,10 @@
 
 static const struct of_device_id st_lsm9ds0_of_match[] = {
 	{
+		.compatible = "st,lsm303d-imu",
+		.data = LSM303D_IMU_DEV_NAME,
+	},
+	{
 		.compatible = "st,lsm9ds0-imu",
 		.data = LSM9DS0_IMU_DEV_NAME,
 	},
@@ -27,11 +31,18 @@ static const struct of_device_id st_lsm9ds0_of_match[] = {
 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
 
 static const struct i2c_device_id st_lsm9ds0_id_table[] = {
+	{ LSM303D_IMU_DEV_NAME },
 	{ LSM9DS0_IMU_DEV_NAME },
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
 
+static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
+	{"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);
+
 static const struct regmap_config st_lsm9ds0_regmap_config = {
 	.reg_bits	= 8,
 	.val_bits	= 8,
@@ -68,6 +79,7 @@ static struct i2c_driver st_lsm9ds0_driver = {
 	.driver = {
 		.name = "st-lsm9ds0-i2c",
 		.of_match_table = st_lsm9ds0_of_match,
+		.acpi_match_table = st_lsm9ds0_acpi_match,
 	},
 	.probe_new = st_lsm9ds0_i2c_probe,
 	.id_table = st_lsm9ds0_id_table,
diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
index b743bf3546a7..8cc041d56cf7 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
@@ -19,6 +19,10 @@
 
 static const struct of_device_id st_lsm9ds0_of_match[] = {
 	{
+		.compatible = "st,lsm303d-imu",
+		.data = LSM303D_IMU_DEV_NAME,
+	},
+	{
 		.compatible = "st,lsm9ds0-imu",
 		.data = LSM9DS0_IMU_DEV_NAME,
 	},
@@ -27,6 +31,7 @@ static const struct of_device_id st_lsm9ds0_of_match[] = {
 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
 
 static const struct spi_device_id st_lsm9ds0_id_table[] = {
+	{ LSM303D_IMU_DEV_NAME },
 	{ LSM9DS0_IMU_DEV_NAME },
 	{}
 };
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index a7a080bed180..176d31d9f9d8 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -194,7 +194,7 @@ static ssize_t iio_buffer_write(struct file *filp, const char __user *buf,
 	written = 0;
 	add_wait_queue(&rb->pollq, &wait);
 	do {
-		if (indio_dev->info == NULL)
+		if (!indio_dev->info)
 			return -ENODEV;
 
 		if (!iio_buffer_space_available(rb)) {
@@ -210,7 +210,7 @@ static ssize_t iio_buffer_write(struct file *filp, const char __user *buf,
 			}
 
 			wait_woken(&wait, TASK_INTERRUPTIBLE,
-					MAX_SCHEDULE_TIMEOUT);
+				   MAX_SCHEDULE_TIMEOUT);
 			continue;
 		}
 
@@ -242,7 +242,7 @@ static __poll_t iio_buffer_poll(struct file *filp,
 	struct iio_buffer *rb = ib->buffer;
 	struct iio_dev *indio_dev = ib->indio_dev;
 
-	if (!indio_dev->info || rb == NULL)
+	if (!indio_dev->info || !rb)
 		return 0;
 
 	poll_wait(filp, &rb->pollq, wait);
@@ -407,9 +407,9 @@ static ssize_t iio_scan_el_show(struct device *dev,
 
 /* Note NULL used as error indicator as it doesn't make sense. */
 static const unsigned long *iio_scan_mask_match(const unsigned long *av_masks,
-					  unsigned int masklength,
-					  const unsigned long *mask,
-					  bool strict)
+						unsigned int masklength,
+						const unsigned long *mask,
+						bool strict)
 {
 	if (bitmap_empty(mask, masklength))
 		return NULL;
@@ -427,7 +427,7 @@ static const unsigned long *iio_scan_mask_match(const unsigned long *av_masks,
 }
 
 static bool iio_validate_scan_mask(struct iio_dev *indio_dev,
-	const unsigned long *mask)
+				   const unsigned long *mask)
 {
 	if (!indio_dev->setup_ops->validate_scan_mask)
 		return true;
@@ -446,7 +446,7 @@ static bool iio_validate_scan_mask(struct iio_dev *indio_dev,
  * individual buffers request is plausible.
  */
 static int iio_scan_mask_set(struct iio_dev *indio_dev,
-		      struct iio_buffer *buffer, int bit)
+			     struct iio_buffer *buffer, int bit)
 {
 	const unsigned long *mask;
 	unsigned long *trialmask;
@@ -539,7 +539,6 @@ error_ret:
 	mutex_unlock(&iio_dev_opaque->mlock);
 
 	return ret < 0 ? ret : len;
-
 }
 
 static ssize_t iio_scan_el_ts_show(struct device *dev,
@@ -706,7 +705,7 @@ static unsigned int iio_storage_bytes_for_timestamp(struct iio_dev *indio_dev)
 }
 
 static int iio_compute_scan_bytes(struct iio_dev *indio_dev,
-				const unsigned long *mask, bool timestamp)
+				  const unsigned long *mask, bool timestamp)
 {
 	unsigned int bytes = 0;
 	int length, i, largest = 0;
@@ -732,7 +731,7 @@ static int iio_compute_scan_bytes(struct iio_dev *indio_dev,
 }
 
 static void iio_buffer_activate(struct iio_dev *indio_dev,
-	struct iio_buffer *buffer)
+				struct iio_buffer *buffer)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 
@@ -753,12 +752,12 @@ static void iio_buffer_deactivate_all(struct iio_dev *indio_dev)
 	struct iio_buffer *buffer, *_buffer;
 
 	list_for_each_entry_safe(buffer, _buffer,
-			&iio_dev_opaque->buffer_list, buffer_list)
+				 &iio_dev_opaque->buffer_list, buffer_list)
 		iio_buffer_deactivate(buffer);
 }
 
 static int iio_buffer_enable(struct iio_buffer *buffer,
-	struct iio_dev *indio_dev)
+			     struct iio_dev *indio_dev)
 {
 	if (!buffer->access->enable)
 		return 0;
@@ -766,7 +765,7 @@ static int iio_buffer_enable(struct iio_buffer *buffer,
 }
 
 static int iio_buffer_disable(struct iio_buffer *buffer,
-	struct iio_dev *indio_dev)
+			      struct iio_dev *indio_dev)
 {
 	if (!buffer->access->disable)
 		return 0;
@@ -774,7 +773,7 @@ static int iio_buffer_disable(struct iio_buffer *buffer,
 }
 
 static void iio_buffer_update_bytes_per_datum(struct iio_dev *indio_dev,
-	struct iio_buffer *buffer)
+					      struct iio_buffer *buffer)
 {
 	unsigned int bytes;
 
@@ -782,13 +781,13 @@ static void iio_buffer_update_bytes_per_datum(struct iio_dev *indio_dev,
 		return;
 
 	bytes = iio_compute_scan_bytes(indio_dev, buffer->scan_mask,
-		buffer->scan_timestamp);
+				       buffer->scan_timestamp);
 
 	buffer->access->set_bytes_per_datum(buffer, bytes);
 }
 
 static int iio_buffer_request_update(struct iio_dev *indio_dev,
-	struct iio_buffer *buffer)
+				     struct iio_buffer *buffer)
 {
 	int ret;
 
@@ -797,7 +796,7 @@ static int iio_buffer_request_update(struct iio_dev *indio_dev,
 		ret = buffer->access->request_update(buffer);
 		if (ret) {
 			dev_dbg(&indio_dev->dev,
-			       "Buffer not started: buffer parameter update failed (%d)\n",
+				"Buffer not started: buffer parameter update failed (%d)\n",
 				ret);
 			return ret;
 		}
@@ -807,7 +806,7 @@ static int iio_buffer_request_update(struct iio_dev *indio_dev,
 }
 
 static void iio_free_scan_mask(struct iio_dev *indio_dev,
-	const unsigned long *mask)
+			       const unsigned long *mask)
 {
 	/* If the mask is dynamically allocated free it, otherwise do nothing */
 	if (!indio_dev->available_scan_masks)
@@ -823,8 +822,9 @@ struct iio_device_config {
 };
 
 static int iio_verify_update(struct iio_dev *indio_dev,
-	struct iio_buffer *insert_buffer, struct iio_buffer *remove_buffer,
-	struct iio_device_config *config)
+			     struct iio_buffer *insert_buffer,
+			     struct iio_buffer *remove_buffer,
+			     struct iio_device_config *config)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 	unsigned long *compound_mask;
@@ -864,7 +864,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
 	if (insert_buffer) {
 		modes &= insert_buffer->access->modes;
 		config->watermark = min(config->watermark,
-			insert_buffer->watermark);
+					insert_buffer->watermark);
 	}
 
 	/* Definitely possible for devices to support both of these. */
@@ -890,7 +890,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
 
 	/* What scan mask do we actually have? */
 	compound_mask = bitmap_zalloc(indio_dev->masklength, GFP_KERNEL);
-	if (compound_mask == NULL)
+	if (!compound_mask)
 		return -ENOMEM;
 
 	scan_timestamp = false;
@@ -911,18 +911,18 @@ static int iio_verify_update(struct iio_dev *indio_dev,
 
 	if (indio_dev->available_scan_masks) {
 		scan_mask = iio_scan_mask_match(indio_dev->available_scan_masks,
-				    indio_dev->masklength,
-				    compound_mask,
-				    strict_scanmask);
+						indio_dev->masklength,
+						compound_mask,
+						strict_scanmask);
 		bitmap_free(compound_mask);
-		if (scan_mask == NULL)
+		if (!scan_mask)
 			return -EINVAL;
 	} else {
 		scan_mask = compound_mask;
 	}
 
 	config->scan_bytes = iio_compute_scan_bytes(indio_dev,
-				    scan_mask, scan_timestamp);
+						    scan_mask, scan_timestamp);
 	config->scan_mask = scan_mask;
 	config->scan_timestamp = scan_timestamp;
 
@@ -954,16 +954,16 @@ static void iio_buffer_demux_free(struct iio_buffer *buffer)
 }
 
 static int iio_buffer_add_demux(struct iio_buffer *buffer,
-	struct iio_demux_table **p, unsigned int in_loc, unsigned int out_loc,
-	unsigned int length)
+				struct iio_demux_table **p, unsigned int in_loc,
+				unsigned int out_loc,
+				unsigned int length)
 {
-
 	if (*p && (*p)->from + (*p)->length == in_loc &&
-		(*p)->to + (*p)->length == out_loc) {
+	    (*p)->to + (*p)->length == out_loc) {
 		(*p)->length += length;
 	} else {
 		*p = kmalloc(sizeof(**p), GFP_KERNEL);
-		if (*p == NULL)
+		if (!(*p))
 			return -ENOMEM;
 		(*p)->from = in_loc;
 		(*p)->to = out_loc;
@@ -1027,7 +1027,7 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
 		out_loc += length;
 	}
 	buffer->demux_bounce = kzalloc(out_loc, GFP_KERNEL);
-	if (buffer->demux_bounce == NULL) {
+	if (!buffer->demux_bounce) {
 		ret = -ENOMEM;
 		goto error_clear_mux_table;
 	}
@@ -1060,7 +1060,7 @@ error_clear_mux_table:
 }
 
 static int iio_enable_buffers(struct iio_dev *indio_dev,
-	struct iio_device_config *config)
+			      struct iio_device_config *config)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 	struct iio_buffer *buffer, *tmp = NULL;
@@ -1078,7 +1078,7 @@ static int iio_enable_buffers(struct iio_dev *indio_dev,
 		ret = indio_dev->setup_ops->preenable(indio_dev);
 		if (ret) {
 			dev_dbg(&indio_dev->dev,
-			       "Buffer not started: buffer preenable failed (%d)\n", ret);
+				"Buffer not started: buffer preenable failed (%d)\n", ret);
 			goto err_undo_config;
 		}
 	}
@@ -1118,7 +1118,7 @@ static int iio_enable_buffers(struct iio_dev *indio_dev,
 		ret = indio_dev->setup_ops->postenable(indio_dev);
 		if (ret) {
 			dev_dbg(&indio_dev->dev,
-			       "Buffer not started: postenable failed (%d)\n", ret);
+				"Buffer not started: postenable failed (%d)\n", ret);
 			goto err_detach_pollfunc;
 		}
 	}
@@ -1194,15 +1194,15 @@ static int iio_disable_buffers(struct iio_dev *indio_dev)
 }
 
 static int __iio_update_buffers(struct iio_dev *indio_dev,
-		       struct iio_buffer *insert_buffer,
-		       struct iio_buffer *remove_buffer)
+				struct iio_buffer *insert_buffer,
+				struct iio_buffer *remove_buffer)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 	struct iio_device_config new_config;
 	int ret;
 
 	ret = iio_verify_update(indio_dev, insert_buffer, remove_buffer,
-		&new_config);
+				&new_config);
 	if (ret)
 		return ret;
 
@@ -1258,7 +1258,7 @@ int iio_update_buffers(struct iio_dev *indio_dev,
 		return 0;
 
 	if (insert_buffer &&
-	    (insert_buffer->direction == IIO_BUFFER_DIRECTION_OUT))
+	    insert_buffer->direction == IIO_BUFFER_DIRECTION_OUT)
 		return -EINVAL;
 
 	mutex_lock(&iio_dev_opaque->info_exist_lock);
@@ -1275,7 +1275,7 @@ int iio_update_buffers(struct iio_dev *indio_dev,
 		goto out_unlock;
 	}
 
-	if (indio_dev->info == NULL) {
+	if (!indio_dev->info) {
 		ret = -ENODEV;
 		goto out_unlock;
 	}
@@ -1615,7 +1615,7 @@ static int __iio_buffer_alloc_sysfs_and_mask(struct iio_buffer *buffer,
 
 	buffer_attrcount = 0;
 	if (buffer->attrs) {
-		while (buffer->attrs[buffer_attrcount] != NULL)
+		while (buffer->attrs[buffer_attrcount])
 			buffer_attrcount++;
 	}
 	buffer_attrcount += ARRAY_SIZE(iio_buffer_attrs);
@@ -1643,7 +1643,7 @@ static int __iio_buffer_alloc_sysfs_and_mask(struct iio_buffer *buffer,
 			}
 
 			ret = iio_buffer_add_channel_sysfs(indio_dev, buffer,
-							 &channels[i]);
+							   &channels[i]);
 			if (ret < 0)
 				goto error_cleanup_dynamic;
 			scan_el_attrcount += ret;
@@ -1651,10 +1651,10 @@ static int __iio_buffer_alloc_sysfs_and_mask(struct iio_buffer *buffer,
 				iio_dev_opaque->scan_index_timestamp =
 					channels[i].scan_index;
 		}
-		if (indio_dev->masklength && buffer->scan_mask == NULL) {
+		if (indio_dev->masklength && !buffer->scan_mask) {
 			buffer->scan_mask = bitmap_zalloc(indio_dev->masklength,
 							  GFP_KERNEL);
-			if (buffer->scan_mask == NULL) {
+			if (!buffer->scan_mask) {
 				ret = -ENOMEM;
 				goto error_cleanup_dynamic;
 			}
@@ -1771,7 +1771,7 @@ int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
 			goto error_unwind_sysfs_and_mask;
 	}
 
-	sz = sizeof(*(iio_dev_opaque->buffer_ioctl_handler));
+	sz = sizeof(*iio_dev_opaque->buffer_ioctl_handler);
 	iio_dev_opaque->buffer_ioctl_handler = kzalloc(sz, GFP_KERNEL);
 	if (!iio_dev_opaque->buffer_ioctl_handler) {
 		ret = -ENOMEM;
@@ -1820,14 +1820,14 @@ void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev)
  * a time.
  */
 bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev,
-	const unsigned long *mask)
+				   const unsigned long *mask)
 {
 	return bitmap_weight(mask, indio_dev->masklength) == 1;
 }
 EXPORT_SYMBOL_GPL(iio_validate_scan_mask_onehot);
 
 static const void *iio_demux(struct iio_buffer *buffer,
-				 const void *datain)
+			     const void *datain)
 {
 	struct iio_demux_table *t;
 
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 6fa31fcd71a1..811fa9599abc 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -413,6 +413,17 @@ config OPT3001
 	  If built as a dynamically linked module, it will be called
 	  opt3001.
 
+config OPT4001
+	tristate "Texas Instruments OPT4001 Light Sensor"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  If you say Y or M here, you get support for Texas Instruments
+	  OPT4001 Ambient Light Sensor.
+
+	  If built as a dynamically linked module, it will be called
+	  opt4001.
+
 config PA12203001
 	tristate "TXC PA12203001 light and proximity sensor"
 	depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 985f6feaccd4..810ed6ffd9c4 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_MAX44000)		+= max44000.o
 obj-$(CONFIG_MAX44009)		+= max44009.o
 obj-$(CONFIG_NOA1305)		+= noa1305.o
 obj-$(CONFIG_OPT3001)		+= opt3001.o
+obj-$(CONFIG_OPT4001)		+= opt4001.o
 obj-$(CONFIG_PA12203001)	+= pa12203001.o
 obj-$(CONFIG_ROHM_BU27034)	+= rohm-bu27034.o
 obj-$(CONFIG_RPR0521)		+= rpr0521.o
diff --git a/drivers/iio/light/al3320a.c b/drivers/iio/light/al3320a.c
index 9ff28bbf34bb..36214d790f71 100644
--- a/drivers/iio/light/al3320a.c
+++ b/drivers/iio/light/al3320a.c
@@ -16,6 +16,7 @@
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/mod_devicetable.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -247,11 +248,18 @@ static const struct of_device_id al3320a_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, al3320a_of_match);
 
+static const struct acpi_device_id al3320a_acpi_match[] = {
+	{"CALS0001"},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, al3320a_acpi_match);
+
 static struct i2c_driver al3320a_driver = {
 	.driver = {
 		.name = AL3320A_DRV_NAME,
 		.of_match_table = al3320a_of_match,
 		.pm = pm_sleep_ptr(&al3320a_pm_ops),
+		.acpi_match_table = al3320a_acpi_match,
 	},
 	.probe_new	= al3320a_probe,
 	.id_table	= al3320a_id,
diff --git a/drivers/iio/light/opt4001.c b/drivers/iio/light/opt4001.c
new file mode 100644
index 000000000000..feb57cb99aa4
--- /dev/null
+++ b/drivers/iio/light/opt4001.c
@@ -0,0 +1,467 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Axis Communications AB
+ *
+ * Datasheet: https://www.ti.com/lit/gpn/opt4001
+ *
+ * Device driver for the Texas Instruments OPT4001.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+/* OPT4001 register set */
+#define OPT4001_LIGHT1_MSB    0x00
+#define OPT4001_LIGHT1_LSB    0x01
+#define OPT4001_CTRL          0x0A
+#define OPT4001_DEVICE_ID     0x11
+
+/* OPT4001 register mask */
+#define OPT4001_EXPONENT_MASK    GENMASK(15, 12)
+#define OPT4001_MSB_MASK         GENMASK(11, 0)
+#define OPT4001_LSB_MASK         GENMASK(15, 8)
+#define OPT4001_COUNTER_MASK     GENMASK(7, 4)
+#define OPT4001_CRC_MASK         GENMASK(3, 0)
+
+/* OPT4001 device id mask */
+#define OPT4001_DEVICE_ID_MASK   GENMASK(11, 0)
+
+/* OPT4001 control registers mask */
+#define OPT4001_CTRL_QWAKE_MASK          GENMASK(15, 15)
+#define OPT4001_CTRL_RANGE_MASK          GENMASK(13, 10)
+#define OPT4001_CTRL_CONV_TIME_MASK      GENMASK(9, 6)
+#define OPT4001_CTRL_OPER_MODE_MASK      GENMASK(5, 4)
+#define OPT4001_CTRL_LATCH_MASK          GENMASK(3, 3)
+#define OPT4001_CTRL_INT_POL_MASK        GENMASK(2, 2)
+#define OPT4001_CTRL_FAULT_COUNT         GENMASK(0, 1)
+
+/* OPT4001 constants */
+#define OPT4001_DEVICE_ID_VAL            0x121
+
+/* OPT4001 operating modes */
+#define OPT4001_CTRL_OPER_MODE_OFF        0x0
+#define OPT4001_CTRL_OPER_MODE_FORCED     0x1
+#define OPT4001_CTRL_OPER_MODE_ONE_SHOT   0x2
+#define OPT4001_CTRL_OPER_MODE_CONTINUOUS 0x3
+
+/* OPT4001 conversion control register definitions */
+#define OPT4001_CTRL_CONVERSION_0_6MS   0x0
+#define OPT4001_CTRL_CONVERSION_1MS     0x1
+#define OPT4001_CTRL_CONVERSION_1_8MS   0x2
+#define OPT4001_CTRL_CONVERSION_3_4MS   0x3
+#define OPT4001_CTRL_CONVERSION_6_5MS   0x4
+#define OPT4001_CTRL_CONVERSION_12_7MS  0x5
+#define OPT4001_CTRL_CONVERSION_25MS    0x6
+#define OPT4001_CTRL_CONVERSION_50MS    0x7
+#define OPT4001_CTRL_CONVERSION_100MS   0x8
+#define OPT4001_CTRL_CONVERSION_200MS   0x9
+#define OPT4001_CTRL_CONVERSION_400MS   0xa
+#define OPT4001_CTRL_CONVERSION_800MS   0xb
+
+/* OPT4001 scale light level range definitions */
+#define OPT4001_CTRL_LIGHT_SCALE_AUTO   12
+
+/* OPT4001 default values */
+#define OPT4001_DEFAULT_CONVERSION_TIME OPT4001_CTRL_CONVERSION_800MS
+
+/*
+ * The different packaging of OPT4001 has different constants used when calculating
+ * lux values.
+ */
+struct opt4001_chip_info {
+	int mul;
+	int div;
+	const char *name;
+};
+
+struct opt4001_chip {
+	struct regmap *regmap;
+	struct i2c_client *client;
+	u8 int_time;
+	const struct opt4001_chip_info *chip_info;
+};
+
+static const struct opt4001_chip_info opt4001_sot_5x3_info = {
+	.mul = 4375,
+	.div = 10000000,
+	.name = "opt4001-sot-5x3"
+};
+
+static const struct opt4001_chip_info opt4001_picostar_info = {
+	.mul = 3125,
+	.div = 10000000,
+	.name = "opt4001-picostar"
+};
+
+static const int opt4001_int_time_available[][2] = {
+	{ 0,    600 },
+	{ 0,   1000 },
+	{ 0,   1800 },
+	{ 0,   3400 },
+	{ 0,   6500 },
+	{ 0,  12700 },
+	{ 0,  25000 },
+	{ 0,  50000 },
+	{ 0, 100000 },
+	{ 0, 200000 },
+	{ 0, 400000 },
+	{ 0, 800000 },
+};
+
+/*
+ * Conversion time is integration time + time to set register
+ * this is used as integration time.
+ */
+static const int opt4001_int_time_reg[][2] = {
+	{    600,  OPT4001_CTRL_CONVERSION_0_6MS  },
+	{   1000,  OPT4001_CTRL_CONVERSION_1MS    },
+	{   1800,  OPT4001_CTRL_CONVERSION_1_8MS  },
+	{   3400,  OPT4001_CTRL_CONVERSION_3_4MS  },
+	{   6500,  OPT4001_CTRL_CONVERSION_6_5MS  },
+	{  12700,  OPT4001_CTRL_CONVERSION_12_7MS },
+	{  25000,  OPT4001_CTRL_CONVERSION_25MS   },
+	{  50000,  OPT4001_CTRL_CONVERSION_50MS   },
+	{ 100000,  OPT4001_CTRL_CONVERSION_100MS  },
+	{ 200000,  OPT4001_CTRL_CONVERSION_200MS  },
+	{ 400000,  OPT4001_CTRL_CONVERSION_400MS  },
+	{ 800000,  OPT4001_CTRL_CONVERSION_800MS  },
+};
+
+static int opt4001_als_time_to_index(const u32 als_integration_time)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(opt4001_int_time_available); i++) {
+		if (als_integration_time == opt4001_int_time_available[i][1])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static u8 opt4001_calculate_crc(u8 exp, u32 mantissa, u8 count)
+{
+	u8 crc;
+
+	crc = (hweight32(mantissa) + hweight32(exp) + hweight32(count)) % 2;
+	crc |= ((hweight32(mantissa & 0xAAAAA) + hweight32(exp & 0xA)
+		 + hweight32(count & 0xA)) % 2) << 1;
+	crc |= ((hweight32(mantissa & 0x88888) + hweight32(exp & 0x8)
+		 + hweight32(count & 0x8)) % 2) << 2;
+	crc |= (hweight32(mantissa & 0x80808) % 2) << 3;
+
+	return crc;
+}
+
+static int opt4001_read_lux_value(struct iio_dev *indio_dev,
+				  int *val, int *val2)
+{
+	struct opt4001_chip *chip = iio_priv(indio_dev);
+	struct device *dev = &chip->client->dev;
+	unsigned int light1;
+	unsigned int light2;
+	u16 msb;
+	u16 lsb;
+	u8 exp;
+	u8 count;
+	u8 crc;
+	u8 calc_crc;
+	u64 lux_raw;
+	int ret;
+
+	ret = regmap_read(chip->regmap, OPT4001_LIGHT1_MSB, &light1);
+	if (ret < 0) {
+		dev_err(dev, "Failed to read data bytes");
+		return ret;
+	}
+
+	ret = regmap_read(chip->regmap, OPT4001_LIGHT1_LSB, &light2);
+	if (ret < 0) {
+		dev_err(dev, "Failed to read data bytes");
+		return ret;
+	}
+
+	count = FIELD_GET(OPT4001_COUNTER_MASK, light2);
+	exp = FIELD_GET(OPT4001_EXPONENT_MASK, light1);
+	crc = FIELD_GET(OPT4001_CRC_MASK, light2);
+	msb = FIELD_GET(OPT4001_MSB_MASK, light1);
+	lsb = FIELD_GET(OPT4001_LSB_MASK, light2);
+	lux_raw = (msb << 8) + lsb;
+	calc_crc = opt4001_calculate_crc(exp, lux_raw, count);
+	if (calc_crc != crc)
+		return -EIO;
+
+	lux_raw = lux_raw << exp;
+	lux_raw = lux_raw * chip->chip_info->mul;
+	*val = div_u64_rem(lux_raw, chip->chip_info->div, val2);
+	*val2 = *val2 * 100;
+
+	return IIO_VAL_INT_PLUS_NANO;
+}
+
+static int opt4001_set_conf(struct opt4001_chip *chip)
+{
+	struct device *dev = &chip->client->dev;
+	u16 reg;
+	int ret;
+
+	reg = FIELD_PREP(OPT4001_CTRL_RANGE_MASK, OPT4001_CTRL_LIGHT_SCALE_AUTO);
+	reg |= FIELD_PREP(OPT4001_CTRL_CONV_TIME_MASK, chip->int_time);
+	reg |= FIELD_PREP(OPT4001_CTRL_OPER_MODE_MASK, OPT4001_CTRL_OPER_MODE_CONTINUOUS);
+
+	ret = regmap_write(chip->regmap, OPT4001_CTRL, reg);
+	if (ret)
+		dev_err(dev, "Failed to set configuration\n");
+
+	return ret;
+}
+
+static int opt4001_power_down(struct opt4001_chip *chip)
+{
+	struct device *dev = &chip->client->dev;
+	int ret;
+	unsigned int reg;
+
+	ret = regmap_read(chip->regmap, OPT4001_DEVICE_ID, &reg);
+	if (ret) {
+		dev_err(dev, "Failed to read configuration\n");
+		return ret;
+	}
+
+	/* MODE_OFF is 0x0 so just set bits to 0 */
+	reg &= ~OPT4001_CTRL_OPER_MODE_MASK;
+
+	ret = regmap_write(chip->regmap, OPT4001_CTRL, reg);
+	if (ret)
+		dev_err(dev, "Failed to set configuration to power down\n");
+
+	return ret;
+}
+
+static void opt4001_chip_off_action(void *data)
+{
+	struct opt4001_chip *chip = data;
+
+	opt4001_power_down(chip);
+}
+
+static const struct iio_chan_spec opt4001_channels[] = {
+	{
+		.type = IIO_LIGHT,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+		.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME),
+		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME)
+	},
+};
+
+static int opt4001_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct opt4001_chip *chip = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		return opt4001_read_lux_value(indio_dev, val, val2);
+	case IIO_CHAN_INFO_INT_TIME:
+		*val = 0;
+		*val2 = opt4001_int_time_reg[chip->int_time][0];
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int opt4001_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct opt4001_chip *chip = iio_priv(indio_dev);
+	int int_time;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		int_time = opt4001_als_time_to_index(val2);
+		if (int_time < 0)
+			return int_time;
+		chip->int_time = int_time;
+		return opt4001_set_conf(chip);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int opt4001_read_available(struct iio_dev *indio_dev,
+				  struct iio_chan_spec const *chan,
+				  const int **vals, int *type, int *length,
+				  long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		*length = ARRAY_SIZE(opt4001_int_time_available) * 2;
+		*vals = (const int *)opt4001_int_time_available;
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		return IIO_AVAIL_LIST;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info opt4001_info_no_irq = {
+	.read_raw = opt4001_read_raw,
+	.write_raw = opt4001_write_raw,
+	.read_avail = opt4001_read_available,
+};
+
+static int opt4001_load_defaults(struct opt4001_chip *chip)
+{
+	chip->int_time = OPT4001_DEFAULT_CONVERSION_TIME;
+
+	return opt4001_set_conf(chip);
+}
+
+static bool opt4001_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case OPT4001_LIGHT1_MSB:
+	case OPT4001_LIGHT1_LSB:
+	case OPT4001_CTRL:
+	case OPT4001_DEVICE_ID:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool opt4001_writable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case OPT4001_CTRL:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool opt4001_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case OPT4001_LIGHT1_MSB:
+	case OPT4001_LIGHT1_LSB:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config opt4001_regmap_config = {
+	.name = "opt4001",
+	.reg_bits = 8,
+	.val_bits = 16,
+	.cache_type = REGCACHE_RBTREE,
+	.max_register = OPT4001_DEVICE_ID,
+	.readable_reg = opt4001_readable_reg,
+	.writeable_reg = opt4001_writable_reg,
+	.volatile_reg = opt4001_volatile_reg,
+	.val_format_endian = REGMAP_ENDIAN_BIG,
+};
+
+static int opt4001_probe(struct i2c_client *client)
+{
+	struct opt4001_chip *chip;
+	struct iio_dev *indio_dev;
+	int ret;
+	uint dev_id;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	chip = iio_priv(indio_dev);
+
+	ret = devm_regulator_get_enable(&client->dev, "vdd");
+	if (ret)
+		return dev_err_probe(&client->dev, ret, "Failed to enable vdd supply\n");
+
+	chip->regmap = devm_regmap_init_i2c(client, &opt4001_regmap_config);
+	if (IS_ERR(chip->regmap))
+		return dev_err_probe(&client->dev, PTR_ERR(chip->regmap),
+				     "regmap initialization failed\n");
+	chip->client = client;
+
+	indio_dev->info = &opt4001_info_no_irq;
+
+	ret = regmap_reinit_cache(chip->regmap, &opt4001_regmap_config);
+	if (ret)
+		return dev_err_probe(&client->dev, ret,
+				     "failed to reinit regmap cache\n");
+
+	ret = regmap_read(chip->regmap, OPT4001_DEVICE_ID, &dev_id);
+	if (ret < 0)
+		return dev_err_probe(&client->dev, ret,
+			"Failed to read the device ID register\n");
+
+	dev_id = FIELD_GET(OPT4001_DEVICE_ID_MASK, dev_id);
+	if (dev_id != OPT4001_DEVICE_ID_VAL)
+		dev_warn(&client->dev, "Device ID: %#04x unknown\n", dev_id);
+
+	chip->chip_info = device_get_match_data(&client->dev);
+
+	indio_dev->channels = opt4001_channels;
+	indio_dev->num_channels = ARRAY_SIZE(opt4001_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = chip->chip_info->name;
+
+	ret = opt4001_load_defaults(chip);
+	if (ret < 0)
+		return dev_err_probe(&client->dev, ret,
+				     "Failed to set sensor defaults\n");
+
+	ret = devm_add_action_or_reset(&client->dev,
+					opt4001_chip_off_action,
+					chip);
+	if (ret < 0)
+		return dev_err_probe(&client->dev, ret,
+				     "Failed to setup power off action\n");
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+/*
+ * The compatible string determines which constants to use depending on
+ * opt4001 packaging
+ */
+static const struct i2c_device_id opt4001_id[] = {
+	{ "opt4001-sot-5x3", (kernel_ulong_t)&opt4001_sot_5x3_info },
+	{ "opt4001-picostar", (kernel_ulong_t)&opt4001_picostar_info },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, opt4001_id);
+
+static const struct of_device_id opt4001_of_match[] = {
+	{ .compatible = "ti,opt4001-sot-5x3", .data = &opt4001_sot_5x3_info},
+	{ .compatible = "ti,opt4001-picostar", .data = &opt4001_picostar_info},
+	{}
+};
+MODULE_DEVICE_TABLE(of, opt4001_of_match);
+
+static struct i2c_driver opt4001_driver = {
+	.driver = {
+		.name = "opt4001",
+		.of_match_table = opt4001_of_match,
+	},
+	.probe_new = opt4001_probe,
+	.id_table = opt4001_id,
+};
+module_i2c_driver(opt4001_driver);
+
+MODULE_AUTHOR("Stefan Windfeldt-Prytz <stefan.windfeldt-prytz@axis.com>");
+MODULE_DESCRIPTION("Texas Instruments opt4001 ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/rohm-bu27034.c b/drivers/iio/light/rohm-bu27034.c
index f85194fda6b0..183cf550af13 100644
--- a/drivers/iio/light/rohm-bu27034.c
+++ b/drivers/iio/light/rohm-bu27034.c
@@ -1500,6 +1500,7 @@ static struct i2c_driver bu27034_i2c_driver = {
 	.driver = {
 		.name = "bu27034-als",
 		.of_match_table = bu27034_of_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe_new = bu27034_probe,
 };
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 8faa7409d9e1..6cc0dfd31821 100644
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -427,6 +427,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 		.sensors_supported = {
 			[0] = LSM9DS0_IMU_DEV_NAME,
+			[1] = LSM303D_IMU_DEV_NAME,
 		},
 		.ch = (struct iio_chan_spec *)st_magn_4_16bit_channels,
 		.odr = {
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
index f5f3ee57bc70..607c3a89a647 100644
--- a/include/linux/iio/common/st_sensors.h
+++ b/include/linux/iio/common/st_sensors.h
@@ -22,6 +22,7 @@
 #include <linux/platform_data/st_sensors_pdata.h>
 
 #define LSM9DS0_IMU_DEV_NAME		"lsm9ds0"
+#define LSM303D_IMU_DEV_NAME		"lsm303d"
 
 /*
  * Buffer size max case: 2bytes per channel, 3 channels in total +
diff --git a/include/linux/platform_data/st_sensors_pdata.h b/include/linux/platform_data/st_sensors_pdata.h
index 897051e51b78..a657830232ae 100644
--- a/include/linux/platform_data/st_sensors_pdata.h
+++ b/include/linux/platform_data/st_sensors_pdata.h
@@ -15,7 +15,7 @@
  * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2).
  *	Available only for accelerometer, magnetometer and pressure sensors.
  *	Accelerometer DRDY on LSM330 available only on pin 1 (see datasheet).
- *	Magnetometer DRDY is supported only on LSM9DS0.
+ *	Magnetometer DRDY is supported only on LSM9DS0 and LSM303D.
  * @open_drain: set the interrupt line to be open drain if possible.
  * @spi_3wire: enable spi-3wire mode.
  * @pullups: enable/disable i2c controller pullup resistors.