dt-bindings:iio:st,st-sensors: txt to yaml conversion.

This binding document covers a very large number of different sensors.
As such the existing documentation is less specific than it could
be (such as which devices have 2 interrupt pin options).
That can be improved later.

Denis, are you happy to be listed as maintainer for this one?
If not feel free to suggestion someone else.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Cc: Denis Ciocca <denis.ciocca@st.com>
Link: https://lore.kernel.org/r/20201031184854.745828-45-jic23@kernel.org

Documentation/devicetree/bindings/iio/st,st-sensors.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/st,st-sensors.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics MEMS sensors
+
+description: |
+  Note that whilst this covers many STMicro MEMs sensors, some more complex
+  IMUs need their own bindings.
+  The STMicroelectronics sensor devices are pretty straight-forward I2C or
+  SPI devices, all sharing the same device tree descriptions no matter what
+  type of sensor it is.
+
+maintainers:
+  - Denis Ciocca <denis.ciocca@st.com>
+
+properties:
+  compatible:
+    description: |
+      Some values are deprecated.
+      st,lis3lv02d (deprecated, use st,lis3lv02dl-accel)
+      st,lis302dl-spi (deprecated, use st,lis3lv02dl-accel)
+    enum:
+        # Accelerometers
+      - st,lis3lv02d
+      - st,lis302dl-spi
+      - st,lis3lv02dl-accel
+      - st,lsm303dlh-accel
+      - st,lsm303dlhc-accel
+      - st,lis3dh-accel
+      - st,lsm330d-accel
+      - st,lsm330dl-accel
+      - st,lsm330dlc-accel
+      - st,lis331dl-accel
+      - st,lis331dlh-accel
+      - st,lsm303dl-accel
+      - st,lsm303dlm-accel
+      - st,lsm330-accel
+      - st,lsm303agr-accel
+      - st,lis2dh12-accel
+      - st,h3lis331dl-accel
+      - st,lng2dm-accel
+      - st,lis3l02dq
+      - st,lis2dw12
+      - st,lis3dhh
+      - st,lis3de
+      - st,lis2de12
+      - st,lis2hh12
+        # Gyroscopes
+      - st,l3g4200d-gyro
+      - st,lsm330d-gyro
+      - st,lsm330dl-gyro
+      - st,lsm330dlc-gyro
+      - st,l3gd20-gyro
+      - st,l3gd20h-gyro
+      - st,l3g4is-gyro
+      - st,lsm330-gyro
+      - st,lsm9ds0-gyro
+        # Magnetometers
+      - st,lsm303agr-magn
+      - st,lsm303dlh-magn
+      - st,lsm303dlhc-magn
+      - st,lsm303dlm-magn
+      - st,lis3mdl-magn
+      - st,lis2mdl
+      - st,lsm9ds1-magn
+        # Pressure sensors
+      - st,lps001wp-press
+      - st,lps25h-press
+      - st,lps331ap-press
+      - st,lps22hb-press
+      - st,lps33hw
+      - st,lps35hw
+      - st,lps22hh
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+
+  vdd-supply: true
+  vddio-supply: true
+
+  st,drdy-int-pin:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Some sensors have multiple possible pins via which they can provide
+      a data ready interrupt.  This selects which one.
+    enum:
+      - 1
+      - 2
+
+  drive-open-drain:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      The interrupt/data ready line will be configured as open drain, which
+      is useful if several sensors share the same interrupt line.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        accelerometer@1d {
+            compatible = "st,lis3lv02dl-accel";
+            reg = <0x1d>;
+            interrupt-parent = <&gpio2>;
+            interrupts = <18 IRQ_TYPE_EDGE_RISING>;
+            pinctrl-0 = <&lis3lv02dl_nhk_mode>;
+            pinctrl-names = "default";
+        };
+    };
+...

Documentation/devicetree/bindings/iio/st-sensors.txt

-STMicroelectronics MEMS sensors
-
-The STMicroelectronics sensor devices are pretty straight-forward I2C or
-SPI devices, all sharing the same device tree descriptions no matter what
-type of sensor it is.
-
-Required properties:
-- compatible: see the list of valid compatible strings below
-- reg: the I2C or SPI address the device will respond to
-
-Optional properties:
-- vdd-supply: an optional regulator that needs to be on to provide VDD
-  power to the sensor.
-- vddio-supply: an optional regulator that needs to be on to provide the
-  VDD IO power to the sensor.
-- st,drdy-int-pin: the pin on the package that will be used to signal
-  "data ready" (valid values: 1 or 2). This property is not configurable
-  on all sensors.
-- drive-open-drain: the interrupt/data ready line will be configured
-  as open drain, which is useful if several sensors share the same
-  interrupt line. (This binding is taken from pinctrl/pinctrl-bindings.txt)
-  This is a boolean property.
-
-Sensors may also have applicable pin control settings, those use the
-standard bindings from pinctrl/pinctrl-bindings.txt.
-
-Valid compatible strings:
-
-Accelerometers:
-- st,lis3lv02d (deprecated, use st,lis3lv02dl-accel)
-- st,lis302dl-spi (deprecated, use st,lis3lv02dl-accel)
-- st,lis3lv02dl-accel
-- st,lsm303dlh-accel
-- st,lsm303dlhc-accel
-- st,lis3dh-accel
-- st,lsm330d-accel
-- st,lsm330dl-accel
-- st,lsm330dlc-accel
-- st,lis331dl-accel
-- st,lis331dlh-accel
-- st,lsm303dl-accel
-- st,lsm303dlm-accel
-- st,lsm330-accel
-- st,lsm303agr-accel
-- st,lis2dh12-accel
-- st,h3lis331dl-accel
-- st,lng2dm-accel
-- st,lis3l02dq
-- st,lis2dw12
-- st,lis3dhh
-- st,lis3de
-- st,lis2de12
-- st,lis2hh12
-
-Gyroscopes:
-- st,l3g4200d-gyro
-- st,lsm330d-gyro
-- st,lsm330dl-gyro
-- st,lsm330dlc-gyro
-- st,l3gd20-gyro
-- st,l3gd20h-gyro
-- st,l3g4is-gyro
-- st,lsm330-gyro
-- st,lsm9ds0-gyro
-
-Magnetometers:
-- st,lsm303agr-magn
-- st,lsm303dlh-magn
-- st,lsm303dlhc-magn
-- st,lsm303dlm-magn
-- st,lis3mdl-magn
-- st,lis2mdl
-- st,lsm9ds1-magn
-
-Pressure sensors:
-- st,lps001wp-press
-- st,lps25h-press
-- st,lps331ap-press
-- st,lps22hb-press
-- st,lps33hw
-- st,lps35hw
-- st,lps22hh