Add "mclk" support for maxim,max9867

Merge series from richard.leitner@linux.dev:

This series adds support for the clocks properties in the
maxim,max9867 bindings. Furthermore the binding definitions are
converted from txt to yaml.

The clock property is needed to define the mclk for one of our
boards which uses the the i.MX8MP SAI MCLK as clock for the
maxim,max9867.

2 files changed, 66 insertions, 17 deletions

diff --git a/Documentation/devicetree/bindings/sound/max9867.txt b/Documentation/devicetree/bindings/sound/max9867.txt
deleted file mode 100644
index b8bd914ee697..000000000000
--- a/Documentation/devicetree/bindings/sound/max9867.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-max9867 codec
-
-This device supports I2C mode only.
-
-Required properties:
-
-- compatible : "maxim,max9867"
-- reg : The chip select number on the I2C bus
-
-Example:
-
-&i2c {
-	max9867: max9867@18 {
-		compatible = "maxim,max9867";
-		reg = <0x18>;
-	};
-};
diff --git a/Documentation/devicetree/bindings/sound/maxim,max9867.yaml b/Documentation/devicetree/bindings/sound/maxim,max9867.yaml
new file mode 100644
index 000000000000..6f27029b137d
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/maxim,max9867.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/maxim,max9867.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated MAX9867 CODEC
+
+description: |
+  This device supports I2C only.
+  Pins on the device (for linking into audio routes):
+      * LOUT
+      * ROUT
+      * LINL
+      * LINR
+      * MICL
+      * MICR
+      * DMICL
+      * DMICR
+
+maintainers:
+  - Ladislav Michl <ladis@linux-mips.org>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - maxim,max9867
+
+  '#sound-dai-cells':
+    const: 0
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec@18 {
+            compatible = "maxim,max9867";
+            #sound-dai-cells = <0>;
+            reg = <0x18>;
+            clocks = <&codec_clk>;
+        };
+    };
+
+    codec_clk: clock {
+        compatible = "fixed-clock";
+        #clock-cells = <0>;
+        clock-frequency = <12288000>;
+    };
+...