ASoC: dt-bindings: cirrus,cs42xx8: Convert to dtschema

Convert the Cirrus Logic CS42448/CS42888 audio CODEC bindings to DT
schema format. Set power supply properties to required only for CS42888.

Cc: Daniel Baluta <[email protected]>
Signed-off-by: Animesh Agarwal <[email protected]>
Reviewed-by: Rob Herring (Arm) <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: AnimeshAgarwal28

Documentation/devicetree/bindings/sound/cirrus,cs42xx8.yaml

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/cirrus,cs42xx8.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic CS42448/CS42888 audio CODEC
+
+maintainers:
+  - [email protected]
+
+properties:
+  compatible:
+    enum:
+      - cirrus,cs42448
+      - cirrus,cs42888
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    const: mclk
+
+  VA-supply:
+    description: Analog power supply.
+
+  VD-supply:
+    description: Digital power supply.
+
+  VLC-supply:
+    description: Control port power supply
+
+  VLS-supply:
+    description: Serial port interface power supply.
+
+  reset-gpios:
+    description: This pin is connected to the chip's RESET pin.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: cirrus,cs42888
+then:
+  required:
+    - VA-supply
+    - VD-supply
+    - VLC-supply
+    - VLS-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      codec@48 {
+          compatible = "cirrus,cs42888";
+          reg = <0x48>;
+          clocks = <&codec_mclk 0>;
+          clock-names = "mclk";
+          VA-supply = <&reg_audio>;
+          VD-supply = <&reg_audio>;
+          VLS-supply = <&reg_audio>;
+          VLC-supply = <&reg_audio>;
+          reset-gpios = <&gpio 1>;
+      };
+    };