ASoC: dt-bindings: ak5558: Convert to dtschema

Convert the AK5558 ADC audio codec bindings to DT schema.

Signed-off-by: Saalim Quadri <danascape@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230322200949.8986-1-danascape@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/ak5558.txt

@@ -1,24 +0,0 @@
-AK5558 8 channel differential 32-bit delta-sigma ADC
-
-This device supports I2C mode only.
-
-Required properties:
-
-- compatible : "asahi-kasei,ak5558" or "asahi-kasei,ak5552".
-- reg : The I2C address of the device.
-
-Optional properties:
-
-- reset-gpios: A GPIO specifier for the power down & reset pin.
-- AVDD-supply: Analog power supply
-- DVDD-supply: Digital power supply
-
-Example:
-
-&i2c {
-	ak5558: adc@10 {
-		compatible = "asahi-kasei,ak5558";
-		reg = <0x10>;
-		reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
-	};
-};

Documentation/devicetree/bindings/sound/asahi-kasei,ak5558.yaml

@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/asahi-kasei,ak5558.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AK5558 8 channel differential 32-bit delta-sigma ADC
+
+maintainers:
+  - Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>
+  - Mihai Serban <mihai.serban@nxp.com>
+
+properties:
+  compatible:
+    enum:
+      - asahi-kasei,ak5552
+      - asahi-kasei,ak5558
+
+  reg:
+    maxItems: 1
+
+  avdd-supply:
+    description: A 1.8V supply that powers up the AVDD pin.
+
+  dvdd-supply:
+    description: A 1.2V supply that powers up the DVDD pin.
+
+  reset-gpios:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        ak5558: codec@10 {
+            compatible = "asahi-kasei,ak5558";
+            reg = <0x10>;
+            reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
+        };
+    };