[PATCH 02/10] dt-bindings: i2c: Add documentation for ad242x i2c controllers

[Daniel Mack <daniel@xxxxxxxxxx>]

This device must be placed as a sub-device of an AD242x MFD node.

Signed-off-by: Daniel Mack <daniel@xxxxxxxxxx>
---
 .../bindings/i2c/adi,ad242x-i2c.yaml          | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/adi,ad242x-i2c.yaml

diff --git a/Documentation/devicetree/bindings/i2c/adi,ad242x-i2c.yaml b/Documentation/devicetree/bindings/i2c/adi,ad242x-i2c.yaml
new file mode 100644
index 000000000000..ded92f8a791b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/adi,ad242x-i2c.yaml
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/adi,ad242x-i2c.yaml#";
+$schema: "http://devicetree.org/meta-schemas/core.yaml#";
+
+title: Analog Devices AD242x I2C controller
+
+maintainers:
+  - Daniel Mack <daniel@xxxxxxxxxx>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+description: |
+  This module is part of the AD242x MFD device. For more details and an example
+  refer to Documentation/devicetree/bindings/mfd/ad242x.yaml.
+
+properties:
+  compatible:
+    enum:
+      - adi,ad2428w-i2c
+
+  clock-frequency:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
+    default: 100000
+    enum: [100000, 400000]
+    description: Specifies the I²C clock frequency in Hz.
+
+required:
+  - compatible
-- 
2.23.0