dt-bindings: phy: rockchip-emmc-phy: Convert to dtschema

Convert txt bindings of Rockchip EMMC PHY to dtschema to allow
for validation.

Signed-off-by: Shresth Prasad <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: Yttrium-32

Documentation/devicetree/bindings/phy/rockchip,rk3399-emmc-phy.yaml

@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/rockchip,rk3399-emmc-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip EMMC PHY
+
+maintainers:
+  - Heiko Stuebner <[email protected]>
+
+properties:
+  compatible:
+    const: rockchip,rk3399-emmc-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: emmcclk
+
+  drive-impedance-ohm:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Specifies the drive impedance in Ohm.
+    enum: [33, 40, 50, 66, 100]
+    default: 50
+
+  rockchip,enable-strobe-pulldown:
+    type: boolean
+    description: |
+      Enable internal pull-down for the strobe
+      line.  If not set, pull-down is not used.
+
+  rockchip,output-tapdelay-select:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Specifies the phyctrl_otapdlysec register.
+    default: 0x4
+    maximum: 0xf
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@f780 {
+      compatible = "rockchip,rk3399-emmc-phy";
+      reg = <0xf780 0x20>;
+      clocks = <&sdhci>;
+      clock-names = "emmcclk";
+      drive-impedance-ohm = <50>;
+      #phy-cells = <0>;
+    };

Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt

@@ -176,9 +176,10 @@ allOf:
             Documentation/devicetree/bindings/phy/rockchip-pcie-phy.txt
 
       patternProperties:
-        "phy@[0-9a-f]+$":
-          description:
-            Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
+        "^phy@[0-9a-f]+$":
+          type: object
+          $ref: /schemas/phy/rockchip,rk3399-emmc-phy.yaml#
+          unevaluatedProperties: false
 
   - if:
       properties:
@@ -292,6 +293,15 @@ examples:
         #phy-cells = <0>;
       };
 
+      phy@f780 {
+        compatible = "rockchip,rk3399-emmc-phy";
+        reg = <0xf780 0x20>;
+        clocks = <&sdhci>;
+        clock-names = "emmcclk";
+        drive-impedance-ohm = <50>;
+        #phy-cells = <0>;
+      };
+
       u2phy0: usb2phy@e450 {
         compatible = "rockchip,rk3399-usb2phy";
         reg = <0xe450 0x10>;