ASoC: dt-bindings: ak4104: convert to dt schema

Convert ak4104 binding to DT schema
Signed-off-by: Xiaxi Shen <shenxiaxi26@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://msgid.link/r/20240517051317.466764-1-shenxiaxi26@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/ak4104.txt

-AK4104 S/PDIF transmitter
-
-This device supports SPI mode only.
-
-Required properties:
-
-  - compatible : "asahi-kasei,ak4104"
-
-  - reg : The chip select number on the SPI bus
-
-  - vdd-supply : A regulator node, providing 2.7V - 3.6V
-
-Optional properties:
-
-  - reset-gpios : a GPIO spec for the reset pin. If specified, it will be
-		  deasserted before communication to the device starts.
-
-Example:
-
-spdif: ak4104@0 {
-	compatible = "asahi-kasei,ak4104";
-	reg = <0>;
-	spi-max-frequency = <5000000>;
-	vdd-supply = <&vdd_3v3_reg>;
-};

Documentation/devicetree/bindings/sound/asahi-kasei,ak4104.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/asahi-kasei,ak4104.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AK4104 S/PDIF transmitter
+
+allOf:
+  - $ref: dai-common.yaml#
+
+maintainers:
+  - Daniel Mack <github@zonque.org>
+  - Xiaxi Shen <shenxiaxi26@gmail.com>
+
+properties:
+  compatible:
+    const: asahi-kasei,ak4104
+
+  reg:
+    description: Chip select number on the SPI bus 
+    maxItems: 1
+
+  vdd-supply:
+    description: A regulator node providing between 2.7V and 3.6V.
+
+  reset-gpios:
+    maxItems: 1
+    description: Optional GPIO spec for the reset pin, deasserted 
+                  before communication starts.
+    
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec@0 {
+            compatible = "asahi-kasei,ak4104";
+            reg = <0>;
+            vdd-supply = <&vdd_3v3_reg>;
+        };
+    };