ASoC: dt-bindings: meson: convert axg pdm to schema

Convert the DT binding documentation for the Amlogic axg PDM device to
schema.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230206153449.596326-4-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/amlogic,axg-pdm.txt

@@ -1,29 +0,0 @@
-* Amlogic Audio PDM input
-
-Required properties:
-- compatible: 'amlogic,axg-pdm' or
-	      'amlogic,g12a-pdm' or
-	      'amlogic,sm1-pdm'
-- reg: physical base address of the controller and length of memory
-       mapped region.
-- clocks: list of clock phandle, one for each entry clock-names.
-- clock-names: should contain the following:
-  * "pclk"   : peripheral clock.
-  * "dclk"   : pdm digital clock
-  * "sysclk" : dsp system clock
-- #sound-dai-cells: must be 0.
-
-Optional property:
-- resets: phandle to the dedicated reset line of the pdm input.
-
-Example of PDM on the A113 SoC:
-
-pdm: audio-controller@ff632000 {
-	compatible = "amlogic,axg-pdm";
-	reg = <0x0 0xff632000 0x0 0x34>;
-	#sound-dai-cells = <0>;
-	clocks = <&clkc_audio AUD_CLKID_PDM>,
-		 <&clkc_audio AUD_CLKID_PDM_DCLK>,
-		 <&clkc_audio AUD_CLKID_PDM_SYSCLK>;
-	clock-names = "pclk", "dclk", "sysclk";
-};

Documentation/devicetree/bindings/sound/amlogic,axg-pdm.yaml

@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/amlogic,axg-pdm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Audio AXG PDM input
+
+maintainers:
+  - Jerome Brunet <jbrunet@baylibre.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - amlogic,g12a-pdm
+              - amlogic,sm1-pdm
+          - const: amlogic,axg-pdm
+      - const: amlogic,axg-pdm
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  clocks:
+    items:
+      - description: Peripheral clock
+      - description: PDM digital clock
+      - description: DSP system clock
+
+  clock-names:
+    items:
+      - const: pclk
+      - const: dclk
+      - const: sysclk
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+  - clocks
+  - clock-names
+
+allOf:
+  - $ref: dai-common.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - amlogic,g12a-pdm
+              - amlogic,sm1-pdm
+    then:
+      required:
+        - resets
+
+    else:
+      properties:
+        resets: false
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/axg-audio-clkc.h>
+
+    audio-controller@ff632000 {
+        compatible = "amlogic,axg-pdm";
+        reg = <0xff632000 0x34>;
+        #sound-dai-cells = <0>;
+        clocks = <&clkc_audio AUD_CLKID_PDM>,
+                 <&clkc_audio AUD_CLKID_PDM_DCLK>,
+                 <&clkc_audio AUD_CLKID_PDM_SYSCLK>;
+        clock-names = "pclk", "dclk", "sysclk";
+    };