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

Convert the DT binding documentation for the Amlogic axg audio FIFOs to
schema.

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

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

···
-* Amlogic Audio FIFO controllers
-
-Required properties:
-- compatible: 'amlogic,axg-toddr' or
-	      'amlogic,axg-toddr' or
-	      'amlogic,g12a-frddr' or
-	      'amlogic,g12a-toddr' or
-	      'amlogic,sm1-frddr' or
-	      'amlogic,sm1-toddr'
-- reg: physical base address of the controller and length of memory
-       mapped region.
-- interrupts: interrupt specifier for the fifo.
-- clocks: phandle to the fifo peripheral clock provided by the audio
-	  clock controller.
-- resets: list of reset phandle, one for each entry reset-names.
-- reset-names: should contain the following:
-  * "arb" : memory ARB line (required)
-  * "rst" : dedicated device reset line (optional)
-- #sound-dai-cells: must be 0.
-- amlogic,fifo-depth: The size of the controller's fifo in bytes. This
-  		      is useful for determining certain configuration such
-		      as the flush threshold of the fifo
-
-Example of FRDDR A on the A113 SoC:
-
-frddr_a: audio-controller@1c0 {
-	compatible = "amlogic,axg-frddr";
-	reg = <0x0 0x1c0 0x0 0x1c>;
-	#sound-dai-cells = <0>;
-	interrupts = <GIC_SPI 88 IRQ_TYPE_EDGE_RISING>;
-	clocks = <&clkc_audio AUD_CLKID_FRDDR_A>;
-	resets = <&arb AXG_ARB_FRDDR_A>;
-	fifo-depth = <512>;
-};

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

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/amlogic,axg-fifo.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic AXG Audio FIFO controllers
+
+maintainers:
+  - Jerome Brunet <[e-mail]>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - amlogic,axg-toddr
+          - amlogic,axg-frddr
+      - items:
+          - enum:
+              - amlogic,g12a-toddr
+              - amlogic,sm1-toddr
+          - const: amlogic,axg-toddr
+      - items:
+          - enum:
+              - amlogic,g12a-frddr
+              - amlogic,sm1-frddr
+          - const: amlogic,axg-frddr
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  clocks:
+    items:
+      - description: Peripheral clock
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    minItems: 1
+    maxItems: 2
+
+  reset-names:
+    minItems: 1
+    maxItems: 2
+
+  amlogic,fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Size of the controller's fifo in bytes
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+  - clocks
+  - interrupts
+  - resets
+  - amlogic,fifo-depth
+
+allOf:
+  - $ref: dai-common.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - amlogic,g12a-toddr
+              - amlogic,sm1-toddr
+              - amlogic,g12a-frddr
+              - amlogic,sm1-frddr
+
+    then:
+      properties:
+        resets:
+          minItems: 2
+        reset-names:
+          items:
+            - const: arb
+            - const: rst
+      required:
+        - reset-names
+
+    else:
+      properties:
+        resets:
+          maxItems: 1
+        reset-names:
+          const: arb
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/axg-audio-clkc.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/amlogic,meson-axg-audio-arb.h>
+    #include <dt-bindings/reset/amlogic,meson-g12a-audio-reset.h>
+
+    audio-controller@1c0 {
+        compatible = "amlogic,g12a-frddr", "amlogic,axg-frddr";
+        reg = <0x1c0 0x1c>;
+        #sound-dai-cells = <0>;
+        clocks = <&clkc_audio AUD_CLKID_FRDDR_A>;
+        interrupts = <GIC_SPI 88 IRQ_TYPE_EDGE_RISING>;
+        resets = <&arb>, <&clkc_audio AUD_RESET_FRDDR_A>;
+        reset-names = "arb", "rst";
+        amlogic,fifo-depth = <512>;
+    };