Merge tag 'iio-for-5.4a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of new device support, features and cleanups for IIO in the 5.4 cycle

Note includes a merge from i3c tree to get support needed for stm_lsm6dsx driver
support for l3c devices.  Done from immutable branch.

A counter subsystem patche in here as well.

Alongside the new device support (which is always good), Chuhong's work
on using devres managed APIs has cleaned up a number of drivers.

New device support
* adis16460
  - New driver based on ADIS framework which needed addition of support
    for cs_change_delay. Includes device tree binding.
* cros_ec
  - Support fo the veyron-minnie which uses an older interface.
* lsm6dsx
  - Support for LSM6DSTR-C gyro + magnetometer sensor (new IDs mainly)
  - Support for ISM330DHCX acc + gyro sensor (extensive rework needed!)
* Maxim 5432
  - New driver support MAX5432-MAX5435 family of potentiometers.
* noa1305
  - New driver for this ON Semiconductor Ambient light sensor.

Features and cleanups
* tree wide
  - Drop error prints after platform_get_irq as already prints errors
    internally if any occur.
* docs
  - Document mounting matrix.
  - Fix a missing newline at end of file.
* ad2s1210
  - Switch to device managed APIs for all of probe and drop explicit remove.
* ad7192
  - Add of_device_id array to explicity handling DT bindings.
* ad7606
  - Lots of rework leading to support for software configure modes in ad7616
    parts.
  - Debugfs register access support.
* am2315
  - Switch to device managed APIs for all of probe and drop explicit remove.
* apds9960
  - Typo in module description.
* cm36651
  - Convert to i2c_new_dummy_device.
  - Swithc to device managed APIs for all of probe adn drop explicit remove.
* cros_ec
  - Calibscale support for accel, gyro and magnetometer.
  - Tidy up some error codes to return the error from the stack rather than
    -EIO.
  - Determine protocol version.
  - Add a sign vector to the core to fix sensor rotation if necessary.
    Cannot just be done with mount matrix as already in use in many devices.
  - Tidy up INFO_SCALE being in both the separate and shared lists.
  - Drop a lot of dplicate code from the cros-ec-accel-legacy driver
    and use the core provided code instead.
  - Make frequency range available to userspace.
* counter / ftm-quaddec
  - Switch to device managed APIs for all of probe adn drop explicit remove.
* hdc100x
  - Switch to device managed APIs for all of probe and drop explicit remove.
* hi8435
  - Use gpiod_set_value_cansleep as we don't care here and there is a
    board out there where it needs to sleep.
  - Switch to device managed APIs for all of probe and drop explict remove.
* hp03
  - Convert to i2c_new_dummy_device.
* maxim thermocouple
  - Switch to device managed APIs for all of probe and drop explicit remove.
* mmc35240
  - Fix typo in constant naming.
* mpu6050
  - Use devm_add_action_or_reset in place of explicit error handling.
  - Make text in Kconfig more explicit about which parts are supported.
* mxc4005
  - Switch to device managed APIs for all of probe and drop explicit remove.
* pms7003
  - Convert device tree bindings to yaml.
  - Add a MAINTAINERS entry
* sc27xx
  - Introduce a local struct device *dev pointer to avoid lots of deref.
  - Use devm_add_action_or_reset in place of explicit error handling.
* sca3000
  - Typo fix in naming.
* si1145
  - Switch to device managed APIs for all of probe and drop explicit remove.
* st_sensors
  - Lots of rework to enable switch to regmap.
  - Regmap conversion at the end.
  - Tidy up some inconsistencies in buffer setup ops.
  - Tidy up an oddity by dropping get_irq_data_ready function in favour
    of direct access.
  - Stop allocating buffer in buffer enable in favour of just embedding
    a large enough constant size buffer in the iio_priv accessed structure.
* st_lsm6dsx
  - l3c device support (LSM6DSO and LSM6DSR)
  - tidy up irq return logic which was strangely written.
  - fix up an ABI quirk where this driver used separate scale
    attributes, even though they were always shared by type.
* stk33xx
  - Device tree bindings include manufacturer ID.
* stm32-adc
  - Add control for supply to analog switches including DT bindings.
* stm32 timer
  - Drop the quadrature mode support.  Believed there were no users so
    take this opportunity to drop this unwanted ABI.
* tsl2772
  - Switch to device mangage APIs for all of probe and drop explicit remove.
  - Use regulator_bulk_* APIs to reduce repitition.
* veml6070
  - Convert to i2c_new_dummy_device.

* tag 'iio-for-5.4a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (84 commits)
  iio: hi8435: Drop hi8435_remove() by using devres for remaining elements
  iio: hi8435: Use gpiod_set_value_cansleep()
  iio:st_sensors: remove buffer allocation at each buffer enable
  iio: imu: inv_mpu6050: be more explicit on supported chips
  iio: light: noa1305: Add support for NOA1305
  dt-bindings: Add binding document for NOA1305
  iio: remove get_irq_data_ready() function pointer and use IRQ number directly
  iio: imu: st_lsm6dsx: make IIO_CHAN_INFO_SCALE shared by type
  iio: tsl2772: Use regulator_bulk_() APIs
  iio: tsl2772: Use devm_iio_device_register
  iio: tsl2772: Use devm_add_action_or_reset for tsl2772_chip_off
  iio: tsl2772: Use devm_add_action_or_reset
  iio: Remove dev_err() usage after platform_get_irq()
  iio: light: si1145: Use device-managed APIs
  iio:pressure: preenable/postenable/predisable fixup for ST press buffer
  iio:magn: preenable/postenable/predisable fixup for ST magn buffer
  iio:gyro: preenable/postenable/predisable fixup for ST gyro buffer
  iio:accel: preenable/postenable/predisable fixup for ST accel buffer
  dt-bindings: iio: imu: st_lsm6dsx: add ism330dhcx device bindings
  iio: imu: st_lsm6dsx: add support to ISM330DHCX
  ...

12 files changed, 455 insertions, 50 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
index da9822309f07..0e66ae9b0071 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
+++ b/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
@@ -13,4 +13,4 @@ Description:
 			error on writing
 		If DFSDM input is SPI Slave:
 			Reading returns value previously set.
-			Writing value before starting conversions.
\ No newline at end of file
+			Writing value before starting conversions.
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
index 161c147d3c40..b7259234ad70 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
+++ b/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
@@ -91,29 +91,6 @@ Description:
 		When counting down the counter start from preset value
 		and fire event when reach 0.
 
-What:		/sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
-KernelVersion:	4.12
-Contact:	benjamin.gaignard@st.com
-Description:
-		Reading returns the list possible quadrature modes.
-
-What:		/sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
-KernelVersion:	4.12
-Contact:	benjamin.gaignard@st.com
-Description:
-		Configure the device counter quadrature modes:
-		channel_A:
-			Encoder A input servers as the count input and B as
-			the UP/DOWN direction control input.
-
-		channel_B:
-			Encoder B input serves as the count input and A as
-			the UP/DOWN direction control input.
-
-		quadrature:
-			Encoder A and B inputs are mixed to get direction
-			and count with a scale of 0.25.
-
 What:		/sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
 KernelVersion:	4.12
 Contact:	benjamin.gaignard@st.com
diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
index 93a0bd2efc05..4c0da8c74bb2 100644
--- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
@@ -47,6 +47,12 @@ Required properties:
 Optional properties:
 - A pinctrl state named "default" for each ADC channel may be defined to set
   inX ADC pins in mode of operation for analog input on external pin.
+- booster-supply: Phandle to the embedded booster regulator that can be used
+  to supply ADC analog input switches on stm32h7 and stm32mp1.
+- vdd-supply: Phandle to the vdd input voltage. It can be used to supply ADC
+  analog input switches on stm32mp1.
+- st,syscfg: Phandle to system configuration controller. It can be used to
+  control the analog circuitry on stm32mp1.
 
 Contents of a stm32 adc child node:
 -----------------------------------
diff --git a/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt b/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt
deleted file mode 100644
index c52ea2126eaa..000000000000
--- a/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-* Plantower PMS7003 particulate matter sensor
-
-Required properties:
-- compatible: must one of:
-   "plantower,pms1003"
-   "plantower,pms3003"
-   "plantower,pms5003"
-   "plantower,pms6003"
-   "plantower,pms7003"
-   "plantower,pmsa003"
-- vcc-supply: phandle to the regulator that provides power to the sensor
-
-Optional properties:
-- plantower,set-gpios: phandle to the GPIO connected to the SET line
-- reset-gpios: phandle to the GPIO connected to the RESET line
-
-Refer to serial/slave-device.txt for generic serial attached device bindings.
-
-Example:
-
-&uart0 {
-	air-pollution-sensor {
-		compatible = "plantower,pms7003";
-		vcc-supply = <&reg_vcc5v0>;
-	};
-};
diff --git a/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml b/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml
new file mode 100644
index 000000000000..a551d3101f93
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/chemical/plantower,pms7003.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Plantower PMS7003 air pollution sensor
+
+maintainers:
+  - Tomasz Duszynski <tduszyns@gmail.com>
+
+description: |
+  Air pollution sensor capable of measuring mass concentration of dust
+  particles.
+
+properties:
+  compatible:
+    enum:
+      - plantower,pms1003
+      - plantower,pms3003
+      - plantower,pms5003
+      - plantower,pms6003
+      - plantower,pms7003
+      - plantower,pmsa003
+
+  vcc-supply:
+    description: regulator that provides power to the sensor
+    maxItems: 1
+
+  plantower,set-gpios:
+    description: GPIO connected to the SET line
+    maxItems: 1
+
+  reset-gpios:
+    description: GPIO connected to the RESET line
+    maxItems: 1
+
+required:
+  - compatible
+  - vcc-supply
+
+examples:
+  - |
+    serial {
+      air-pollution-sensor {
+        compatible = "plantower,pms7003";
+        vcc-supply = <&reg_vcc5v0>;
+      };
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml b/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
new file mode 100644
index 000000000000..0c53009ba7d6
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/imu/adi,adis16460.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADIS16460 and similar IMUs
+
+maintainers:
+  - Dragos Bogdan <dragos.bogdan@analog.com>
+
+description: |
+  Analog Devices ADIS16460 and similar IMUs
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ADIS16460.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,adis16460
+
+  reg:
+    maxItems: 1
+
+  spi-cpha: true
+
+  spi-cpol: true
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        imu@0 {
+            compatible = "adi,adis16460";
+            reg = <0>;
+            spi-max-frequency = <5000000>;
+            spi-cpol;
+            spi-cpha;
+            interrupt-parent = <&gpio0>;
+            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt b/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
index efec9ece034a..87407d110bb7 100644
--- a/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
+++ b/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
@@ -11,6 +11,8 @@ Required properties:
   "st,asm330lhh"
   "st,lsm6dsox"
   "st,lsm6dsr"
+  "st,lsm6ds3tr-c"
+  "st,ism330dhcx"
 - reg: i2c address of the sensor / spi cs line
 
 Optional properties:
diff --git a/Documentation/devicetree/bindings/iio/light/noa1305.yaml b/Documentation/devicetree/bindings/iio/light/noa1305.yaml
new file mode 100644
index 000000000000..17e7f140b69b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/noa1305.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/noa1305.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ON Semiconductor NOA1305 Ambient Light Sensor
+
+maintainers:
+  - Martyn Welch <martyn.welch@collabora.com>
+
+description: |
+  Ambient sensing with an i2c interface.
+
+  https://www.onsemi.com/pub/Collateral/NOA1305-D.PDF
+
+properties:
+  compatible:
+    enum:
+      - onnn,noa1305
+
+  reg:
+    maxItems: 1
+
+  vin-supply:
+    description: Regulator that provides power to the sensor
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c {
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light@39 {
+                compatible = "onnn,noa1305";
+                reg = <0x39>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/light/stk33xx.yaml b/Documentation/devicetree/bindings/iio/light/stk33xx.yaml
new file mode 100644
index 000000000000..aae8a6d627c9
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/stk33xx.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/stk33xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: |
+  Sensortek STK33xx I2C Ambient Light and Proximity sensor
+
+maintainers:
+  - Jonathan Cameron <jic23@kernel.org>
+
+description: |
+  Ambient light and proximity sensor over an i2c interface.
+
+properties:
+  compatible:
+    enum:
+      - sensortek,stk3310
+      - sensortek,stk3311
+      - sensortek,stk3335
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        stk3310@48 {
+                compatible = "sensortek,stk3310";
+                reg = <0x48>;
+                interrupt-parent = <&gpio1>;
+                interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/mount-matrix.txt b/Documentation/devicetree/bindings/iio/mount-matrix.txt
new file mode 100644
index 000000000000..c3344ab509a3
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/mount-matrix.txt
@@ -0,0 +1,203 @@
+For discussion. Unclear are:
+* is the definition of +/- values practical or counterintuitive?
+* are the definitions unambiguous and easy to follow?
+* are the examples correct?
+* should we have HOWTO engineer a correct matrix for a new device (without comparing to a different one)?
+
+====
+
+
+Mounting matrix
+
+The mounting matrix is a device tree property used to orient any device
+that produce three-dimensional data in relation to the world where it is
+deployed.
+
+The purpose of the mounting matrix is to translate the sensor frame of
+reference into the device frame of reference using a translation matrix as
+defined in linear algebra.
+
+The typical usecase is that where a component has an internal representation
+of the (x,y,z) triplets, such as different registers to read these coordinates,
+and thus implying that the component should be mounted in a certain orientation
+relative to some specific device frame of reference.
+
+For example a device with some kind of screen, where the user is supposed to
+interact with the environment using an accelerometer, gyroscope or magnetometer
+mounted on the same chassis as this screen, will likely take the screen as
+reference to (x,y,z) orientation, with (x,y) corresponding to these axes on the
+screen and (z) being depth, the axis perpendicular to the screen.
+
+For a screen you probably want (x) coordinates to go from negative on the left
+to positive on the right, (y) from negative on the bottom to positive on top
+and (z) depth to be negative under the screen and positive in front of it,
+toward the face of the user.
+
+A sensor can be mounted in any angle along the axes relative to the frame of
+reference. This means that the sensor may be flipped upside-down, left-right,
+or tilted at any angle relative to the frame of reference.
+
+Another frame of reference is how the device with its sensor relates to the
+external world, the environment where the device is deployed. Usually the data
+from the sensor is used to figure out how the device is oriented with respect
+to this world. When using the mounting matrix, the sensor and device orientation
+becomes identical and we can focus on the data as it relates to the surrounding
+world.
+
+Device-to-world examples for some three-dimensional sensor types:
+
+- Accelerometers have their world frame of reference toward the center of
+  gravity, usually to the core of the planet. A reading of the (x,y,z) values
+  from the sensor will give a projection of the gravity vector through the
+  device relative to the center of the planet, i.e. relative to its surface at
+  this point. Up and down in the world relative to the device frame of
+  reference can thus be determined. and users would likely expect a value of
+  9.81 m/s^2 upwards along the (z) axis, i.e. out of the screen when the device
+  is held with its screen flat on the planets surface and 0 on the other axes,
+  as the gravity vector is projected 1:1 onto the sensors (z)-axis.
+
+  If you tilt the device, the g vector virtually coming out of the display
+  is projected onto the (x,y) plane of the display panel.
+
+  Example:
+
+         ^ z: +g                   ^ z: > 0
+         !                        /!
+         ! x=y=0                 / ! x: > 0
+     +--------+             +--------+
+     !        !             !        !
+     +--------+             +--------+
+         !                    /
+         !                   /
+         v                  v
+      center of         center of
+       gravity           gravity
+
+
+  If the device is tilted to the left, you get a positive x value. If you point
+  its top towards surface, you get a negative y axis.
+
+     (---------)
+     !         !           y: -g
+     !         !             ^
+     !         !             !
+     !         !
+     !         !  x: +g <- z: +g  -> x: -g
+     ! 1  2  3 !
+     ! 4  5  6 !             !
+     ! 7  8  9 !             v
+     ! *  0  # !           y: +g
+     (---------)
+
+
+- Magnetometers (compasses) have their world frame of reference relative to the
+  geomagnetic field. The system orientation vis-a-vis the world is defined with
+  respect to the local earth geomagnetic reference frame where (y) is in the
+  ground plane and positive towards magnetic North, (x) is in the ground plane,
+  perpendicular to the North axis and positive towards the East and (z) is
+  perpendicular to the ground plane and positive upwards.
+
+
+     ^^^ North: y > 0
+
+     (---------)
+     !         !
+     !         !
+     !         !
+     !         !  >
+     !         !  > North: x > 0
+     ! 1  2  3 !  >
+     ! 4  5  6 !
+     ! 7  8  9 !
+     ! *  0  # !
+     (---------)
+
+  Since the geomagnetic field is not uniform this definition fails if we come
+  closer to the poles.
+
+  Sensors and driver can not and should not take care of this because there
+  are complex calculations and empirical data to be taken care of. We leave
+  this up to user space.
+
+  The definition we take:
+
+  If the device is placed at the equator and the top is pointing north, the
+  display is readable by a person standing upright on the earth surface, this
+  defines a positive y value.
+
+
+- Gyroscopes detects the movement relative the device itself. The angular
+  velocity is defined as orthogonal to the plane of rotation, so if you put the
+  device on a flat surface and spin it around the z axis (such as rotating a
+  device with a screen lying flat on a table), you should get a negative value
+  along the (z) axis if rotated clockwise, and a positive value if rotated
+  counter-clockwise according to the right-hand rule.
+
+
+     (---------)     y > 0
+     !         !     v---\
+     !         !
+     !         !
+     !         !      <--\
+     !         !         ! z > 0
+     ! 1  2  3 !       --/
+     ! 4  5  6 !
+     ! 7  8  9 !
+     ! *  0  # !
+     (---------)
+
+
+So unless the sensor is ideally mounted, we need a means to indicate the
+relative orientation of any given sensor of this type with respect to the
+frame of reference.
+
+To achieve this, use the device tree property "mount-matrix" for the sensor.
+
+This supplies a 3x3 rotation matrix in the strict linear algebraic sense,
+to orient the senor axes relative to a desired point of reference. This means
+the resulting values from the sensor, after scaling to proper units, should be
+multiplied by this matrix to give the proper vectors values in three-dimensional
+space, relative to the device or world point of reference.
+
+For more information, consult:
+https://en.wikipedia.org/wiki/Rotation_matrix
+
+The mounting matrix has the layout:
+
+ (mxx, myx, mzx)
+ (mxy, myy, mzy)
+ (mxz, myz, mzz)
+
+Values are intended to be multiplied as:
+
+  x' = mxx * x + myx * y + mzx * z
+  y' = mxy * x + myy * y + mzy * z
+  z' = mxz * x + myz * y + mzz * z
+
+It is represented as an array of strings containing the real values for
+producing the transformation matrix.
+
+Examples:
+
+Identity matrix (nothing happens to the coordinates, which means the device was
+mechanically mounted in an ideal way and we need no transformation):
+
+mount-matrix = "1", "0", "0",
+               "0", "1", "0",
+               "0", "0", "1";
+
+The sensor is mounted 30 degrees (Pi/6 radians) tilted along the X axis, so we
+compensate by performing a -30 degrees rotation around the X axis:
+
+mount-matrix = "1", "0", "0",
+               "0", "0.866", "0.5",
+               "0", "-0.5", "0.866";
+
+The sensor is flipped 180 degrees (Pi radians) around the Z axis, i.e. mounted
+upside-down:
+
+mount-matrix = "0.998", "0.054", "0",
+               "-0.054", "0.998", "0",
+               "0", "0", "1";
+
+???: this does not match "180 degrees" - factors indicate ca. 3 degrees compensation
diff --git a/Documentation/devicetree/bindings/iio/potentiometer/max5432.yaml b/Documentation/devicetree/bindings/iio/potentiometer/max5432.yaml
new file mode 100644
index 000000000000..5082f919df2a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/potentiometer/max5432.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/potentiometer/max5432.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated MAX5432-MAX5435 Digital Potentiometers
+
+maintainers:
+  - Martin Kaiser <martin@kaiser.cx>
+
+description: |
+  Maxim Integrated MAX5432-MAX5435 Digital Potentiometers connected via I2C
+
+  Datasheet:
+    https://datasheets.maximintegrated.com/en/ds/MAX5432-MAX5435.pdf
+
+properties:
+  compatible:
+    enum:
+      - maxim,max5432
+      - maxim,max5433
+      - maxim,max5434
+      - maxim,max5435
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      max5434@28 {
+        compatible = "maxim,max5434";
+        reg = <0x28>;
+      };
+    };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 6992bbbbffab..30e222193164 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -813,6 +813,8 @@ patternProperties:
     description: Semtech Corporation
   "^sensirion,.*":
     description: Sensirion AG
+  "^sensortek,.*":
+    description: Sensortek Technology Corporation
   "^sff,.*":
     description: Small Form Factor Committee
   "^sgd,.*":