ASoC: dt-bindings: sprd,pcm-platform: convert to YAML

Convert the Spreadtrum DMA platform bindings to DT schema.
Adjust filename to match compatible.

Signed-off-by: Stanislav Jakubek <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://patch.msgid.link/9fc64[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/sprd,pcm-platform.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/sprd,pcm-platform.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spreadtrum DMA platform
+
+maintainers:
+  - Orson Zhai <[e-mail]>
+  - Baolin Wang <[e-mail]>
+  - Chunyan Zhang <[e-mail]>
+
+properties:
+  compatible:
+    const: sprd,pcm-platform
+
+  dmas:
+    maxItems: 10
+
+  dma-names:
+    items:
+      - const: normal_p_l
+      - const: normal_p_r
+      - const: normal_c_l
+      - const: normal_c_r
+      - const: voice_c
+      - const: fast_p
+      - const: loop_c
+      - const: loop_p
+      - const: voip_c
+      - const: voip_p
+
+required:
+  - compatible
+  - dmas
+  - dma-names
+
+additionalProperties: false
+
+examples:
+  - |
+    platform {
+      compatible = "sprd,pcm-platform";
+      dmas = <&agcp_dma 1 1>, <&agcp_dma 2 2>,
+             <&agcp_dma 3 3>, <&agcp_dma 4 4>,
+             <&agcp_dma 5 5>, <&agcp_dma 6 6>,
+             <&agcp_dma 7 7>, <&agcp_dma 8 8>,
+             <&agcp_dma 9 9>, <&agcp_dma 10 10>;
+      dma-names = "normal_p_l", "normal_p_r",
+                  "normal_c_l", "normal_c_r",
+                  "voice_c", "fast_p",
+                  "loop_c", "loop_p",
+                  "voip_c", "voip_p";
+    };
+...

Documentation/devicetree/bindings/sound/sprd-pcm.txt

···
-* Spreadtrum DMA platform bindings
-
-Required properties:
-- compatible: Should be "sprd,pcm-platform".
-- dmas: Specify the list of DMA controller phandle and DMA request line ordered pairs.
-- dma-names: Identifier string for each DMA request line in the dmas property.
-  These strings correspond 1:1 with the ordered pairs in dmas.
-
-Example:
-
-	audio_platform:platform@0 {
-		compatible = "sprd,pcm-platform";
-		dmas = <&agcp_dma 1 1>, <&agcp_dma 2 2>,
-		     <&agcp_dma 3 3>, <&agcp_dma 4 4>,
-		     <&agcp_dma 5 5>, <&agcp_dma 6 6>,
-		     <&agcp_dma 7 7>, <&agcp_dma 8 8>,
-		     <&agcp_dma 9 9>, <&agcp_dma 10 10>;
-		dma-names = "normal_p_l", "normal_p_r",
-			"normal_c_l", "normal_c_r",
-			"voice_c", "fast_p",
-			"loop_c", "loop_p",
-			"voip_c", "voip_p";
-	};