[PATCH 1/3] dt-bindings: staging: iio: cdc: ad7746: add binding documentation for AD7746

[Lucas Stankus <lucas.p.stankus@gmail.com>]

Add device tree binding documentation for AD7746 cdc in YAML format.

Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
---
 .../bindings/iio/cdc/adi,ad7746.yaml          | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml

diff --git a/Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml b/Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml
new file mode 100644
index 000000000000..5de86f4374e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/cdc/adi,ad7746.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor
+
+maintainers:
+  - Michael Hennerich <michael.hennerich@analog.com>
+
+description: |
+  AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor
+
+  Specifications about the part can be found at:
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad7291.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7745
+      - adi,ad7746
+      - adi,ad7747
+
+  reg:
+    description: |
+      Physiscal address of the EXC set-up register.
+    maxItems: 1
+
+  adi,excitation-voltage-level:
+    description: |
+      Select the reference excitation voltage level used by the device.
+      With VDD being the power supply voltage, valid values are:
+      0: +-VDD / 8
+      1: +-VDD / 4
+      2: +-VDD * 3 / 8
+      3: +-VDD / 2
+      If left empty option 3 is selected.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3]
+
+  adi,exca-output:
+    description: |
+      Sets the excitation output in the exca pin.
+      Valid values are:
+      0: Disables output in the EXCA pin.
+      1: Enables EXCA pin as the excitation output.
+      2: Enables EXCA pin as the inverted excitation output.
+      If left empty the output is disabled.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2]
+
+  adi,excb-output:
+    description: |
+      Analoguos to the adi,exca-output for the EXCB pin.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2]
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      ad7746: cdc@0 {
+        compatible = "adi,ad7746";
+        reg = <0>;
+        adi,excitation-voltage-level = <3>;
+        adi,exca-output = <0>;
+        adi,excb-output = <0>;
+      };
+    };
+...
-- 
2.31.1