ASoC: dt-bindings: rockchip: Convert pdm bindings to yaml

This patch converts pdm bindings to yaml.
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1630675438-3418-2-git-send-email-sugar.zhang@rock-chips.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rockchip,pdm.txt

-* Rockchip PDM controller
-
-Required properties:
-
-- compatible: "rockchip,pdm"
-  - "rockchip,px30-pdm"
-  - "rockchip,rk1808-pdm"
-  - "rockchip,rk3308-pdm"
-  - "rockchip,rk3568-pdm"
-  - "rockchip,rv1126-pdm"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- dmas: DMA specifiers for rx dma. See the DMA client binding,
-	Documentation/devicetree/bindings/dma/dma.txt
-- dma-names: should include "rx".
-- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
-- clock-names: should contain following:
-   - "pdm_hclk": clock for PDM BUS
-   - "pdm_clk" : clock for PDM controller
-- resets: a list of phandle + reset-specifer paris, one for each entry in reset-names.
-- reset-names: reset names, should include "pdm-m".
-- pinctrl-names: Must contain a "default" entry.
-- pinctrl-N: One property must exist for each entry in
-	     pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
-	     for details of the property values.
-
-Optional properties:
-- rockchip,path-map: This is a variable length array, that shows the mapping
-  of SDIx to PATHx. By default, they are one-to-one mapping as follows:
-
-   path0 <-- sdi0
-   path1 <-- sdi1
-   path2 <-- sdi2
-   path3 <-- sdi3
-
-  e.g. "rockchip,path-map = <3 2 1 0>" means the mapping as follows:
-
-   path0 <-- sdi3
-   path1 <-- sdi2
-   path2 <-- sdi1
-   path3 <-- sdi0
-
-Example for rk3328 PDM controller:
-
-pdm: pdm@ff040000 {
-	compatible = "rockchip,pdm";
-	reg = <0x0 0xff040000 0x0 0x1000>;
-	clocks = <&clk_pdm>, <&clk_gates28 0>;
-	clock-names = "pdm_clk", "pdm_hclk";
-	dmas = <&pdma 16>;
-	#dma-cells = <1>;
-	dma-names = "rx";
-	pinctrl-names = "default", "sleep";
-	pinctrl-0 = <&pdmm0_clk
-		     &pdmm0_sdi0
-		     &pdmm0_sdi1
-		     &pdmm0_sdi2
-		     &pdmm0_sdi3>;
-	pinctrl-1 = <&pdmm0_clk_sleep
-		     &pdmm0_sdi0_sleep
-		     &pdmm0_sdi1_sleep
-		     &pdmm0_sdi2_sleep
-		     &pdmm0_sdi3_sleep>;
-};

Documentation/devicetree/bindings/sound/rockchip,pdm.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/rockchip,pdm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip PDM controller
+
+description:
+  The Pulse Density Modulation Interface Controller (PDMC) is
+  a PDM interface controller and decoder that support PDM format.
+  It integrates a clock generator driving the PDM microphone
+  and embeds filters which decimate the incoming bit stream to
+  obtain most common audio rates.
+
+maintainers:
+  - Heiko Stuebner <heiko@sntech.de>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,pdm
+      - rockchip,px30-pdm
+      - rockchip,rk1808-pdm
+      - rockchip,rk3308-pdm
+      - rockchip,rk3568-pdm
+      - rockchip,rv1126-pdm
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: clock for PDM controller
+      - description: clock for PDM BUS
+
+  clock-names:
+    items:
+      - const: pdm_clk
+      - const: pdm_hclk
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    items:
+      - const: rx
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    items:
+      - description: reset for PDM controller
+
+  reset-names:
+    items:
+      - const: pdm-m
+
+  rockchip,path-map:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      Defines the mapping of PDM SDIx to PDM PATHx.
+      By default, they are mapped one-to-one.
+    maxItems: 4
+    uniqueItems: true
+    items:
+      enum: [ 0, 1, 2, 3 ]
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - dmas
+  - dma-names
+  - "#sound-dai-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3328-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/pinctrl/rockchip.h>
+
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pdm@ff040000 {
+            compatible = "rockchip,pdm";
+            reg = <0x0 0xff040000 0x0 0x1000>;
+            interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cru SCLK_PDM>, <&cru HCLK_PDM>;
+            clock-names = "pdm_clk", "pdm_hclk";
+            dmas = <&dmac 16>;
+            dma-names = "rx";
+            #sound-dai-cells = <0>;
+            pinctrl-names = "default", "sleep";
+            pinctrl-0 = <&pdmm0_clk
+                         &pdmm0_sdi0
+                         &pdmm0_sdi1
+                         &pdmm0_sdi2
+                         &pdmm0_sdi3>;
+            pinctrl-1 = <&pdmm0_clk_sleep
+                         &pdmm0_sdi0_sleep
+                         &pdmm0_sdi1_sleep
+                         &pdmm0_sdi2_sleep
+                         &pdmm0_sdi3_sleep>;
+        };
+    };