ASoC: dt-bindings: ak4613: switch to yaml base Documentation

This patch switches from .txt base to .yaml base Document.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/87mu4cxlo2.wl-kuninori.morimoto.gx@renesas.com
Link: https://lore.kernel.org/r/87o8pf3923.wl-kuninori.morimoto.gx@renesas.com
Link: https://lore.kernel.org/r/873659bpbk.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/ak4613.txt

-AK4613 I2C transmitter
-
-This device supports I2C mode only.
-
-Required properties:
-
-- compatible : "asahi-kasei,ak4613"
-- reg : The chip select number on the I2C bus
-
-Optional properties:
-- asahi-kasei,in1-single-end	: Boolean. Indicate input / output pins are single-ended.
-- asahi-kasei,in2-single-end	  rather than differential.
-- asahi-kasei,out1-single-end
-- asahi-kasei,out2-single-end
-- asahi-kasei,out3-single-end
-- asahi-kasei,out4-single-end
-- asahi-kasei,out5-single-end
-- asahi-kasei,out6-single-end
-
-Example:
-
-&i2c {
-	ak4613: ak4613@10 {
-		compatible = "asahi-kasei,ak4613";
-		reg = <0x10>;
-	};
-};

Documentation/devicetree/bindings/sound/ak4613.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ak4613.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AK4613 I2C transmitter Device Tree Bindings
+
+maintainers:
+  - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+properties:
+  compatible:
+    const: asahi-kasei,ak4613
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+patternProperties:
+  "^asahi-kasei,in[1-2]-single-end$":
+    description: Input Pin 1 - 2.
+    $ref: /schemas/types.yaml#/definitions/flag
+
+  "^asahi-kasei,out[1-6]-single-end$":
+    description: Output Pin 1 - 6.
+    $ref: /schemas/types.yaml#/definitions/flag
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        ak4613: codec@10 {
+            compatible = "asahi-kasei,ak4613";
+            reg = <0x10>;
+        };
+    };