ASoC: dt-bindings: maxim,max98357a: Convert to DT schema

Convert the Maxim Integrated MAX98357A/MAX98360A amplifier bindings to
DT schema. Add missing properties ('#sound-dai-cells' and
'sound-name-prefix' from common DAI properties).

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/max98357a.txt

···
-Maxim MAX98357A/MAX98360A audio DAC
-
-This node models the Maxim MAX98357A/MAX98360A DAC.
-
-Required properties:
-- compatible   : "maxim,max98357a" for MAX98357A.
-                 "maxim,max98360a" for MAX98360A.
-
-Optional properties:
-- sdmode-gpios : GPIO specifier for the chip's SD_MODE pin.
-        If this option is not specified then driver does not manage
-        the pin state (e.g. chip is always on).
-- sdmode-delay : specify delay time for SD_MODE pin.
-        If this option is specified, which means it's required i2s clocks
-        ready before SD_MODE is unmuted in order to avoid the speaker pop noise.
-        It's observed that 5ms is sufficient.
-
-Example:
-
-max98357a {
-	compatible = "maxim,max98357a";
-	sdmode-gpios = <&qcom_pinmux 25 0>;
-};
-
-max98360a {
-	compatible = "maxim,max98360a";
-	sdmode-gpios = <&qcom_pinmux 25 0>;
-};

Documentation/devicetree/bindings/sound/maxim,max98357a.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/maxim,max98357a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated MAX98357A/MAX98360A amplifier
+
+maintainers:
+  - Tzung-Bi Shih <[e-mail]>
+
+description:
+  Maxim Integrated MAX98357A/MAX98360A is a digital pulse-code modulation (PCM)
+  input Class D amplifier.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - maxim,max98357a
+      - maxim,max98360a
+
+  '#sound-dai-cells':
+    const: 0
+
+  sdmode-gpios:
+    maxItems: 1
+    description:
+      Chip's SD_MODE pin.  If missing the chip is always on.
+
+  sdmode-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Delay time for SD_MODE pin changes intended to make I2S clocks ready
+      before SD_MODE is unmuted in order to avoid the speaker pop noise.
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    amplifier {
+        compatible = "maxim,max98360a";
+        #sound-dai-cells = <0>;
+        sdmode-gpios = <&qcom_pinmux 25 GPIO_ACTIVE_HIGH>;
+    };