dt-bindings: usb: Convert Allwinner A80 USB PHY controller to a schema

The Allwinner A80 SoCs have a USB PHY controller that is used by Linux,
with a matching Device Tree binding.

Now that we have the DT validation in place, let's convert the device tree
bindings for that controller over to a YAML schemas.

Reviewed-by: Chen-Yu Tsai <[email protected]>
Signed-off-by: Maxime Ripard <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Kishon Vijay Abraham I <[email protected]>

Author: mripard

Documentation/devicetree/bindings/phy/allwinner,sun9i-a80-usb-phy.yaml

@@ -0,0 +1,135 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/allwinner,sun9i-a80-usb-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A80 USB PHY Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <[email protected]>
+  - Maxime Ripard <[email protected]>
+
+properties:
+  "#phy-cells":
+    const: 0
+
+  compatible:
+    const: allwinner,sun9i-a80-usb-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    anyOf:
+      - description: Main PHY Clock
+
+      - items:
+          - description: Main PHY clock
+          - description: HSIC 12MHz clock
+          - description: HSIC 480MHz clock
+
+  clock-names:
+    oneOf:
+      - const: phy
+
+      - items:
+          - const: phy
+          - const: hsic_12M
+          - const: hsic_480M
+
+  resets:
+    anyOf:
+      - description: Normal USB PHY reset
+
+      - items:
+          - description: Normal USB PHY reset
+          - description: HSIC Reset
+
+  reset-names:
+    oneOf:
+      - const: phy
+
+      - items:
+          - const: phy
+          - const: hsic
+
+  phy_type:
+    const: hsic
+    description:
+      When absent, the PHY type will be assumed to be normal USB.
+
+  phy-supply:
+    description:
+      Regulator that powers VBUS
+
+required:
+  - "#phy-cells"
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+
+additionalProperties: false
+
+if:
+  properties:
+    phy_type:
+      const: hsic
+
+  required:
+    - phy_type
+
+then:
+  properties:
+    clocks:
+      maxItems: 3
+
+    clock-names:
+      maxItems: 3
+
+    resets:
+      maxItems: 2
+
+    reset-names:
+      maxItems: 2
+
+examples:
+  - |
+    #include <dt-bindings/clock/sun9i-a80-usb.h>
+    #include <dt-bindings/reset/sun9i-a80-usb.h>
+
+    usbphy1: phy@a00800 {
+        compatible = "allwinner,sun9i-a80-usb-phy";
+        reg = <0x00a00800 0x4>;
+        clocks = <&usb_clocks CLK_USB0_PHY>;
+        clock-names = "phy";
+        resets = <&usb_clocks RST_USB0_PHY>;
+        reset-names = "phy";
+        phy-supply = <&reg_usb1_vbus>;
+        #phy-cells = <0>;
+    };
+
+  - |
+    #include <dt-bindings/clock/sun9i-a80-usb.h>
+    #include <dt-bindings/reset/sun9i-a80-usb.h>
+
+    usbphy3: phy@a02800 {
+        compatible = "allwinner,sun9i-a80-usb-phy";
+        reg = <0x00a02800 0x4>;
+        clocks = <&usb_clocks CLK_USB2_PHY>,
+                 <&usb_clocks CLK_USB_HSIC>,
+                 <&usb_clocks CLK_USB2_HSIC>;
+        clock-names = "phy",
+                      "hsic_12M",
+                      "hsic_480M";
+        resets = <&usb_clocks RST_USB2_PHY>,
+                 <&usb_clocks RST_USB2_HSIC>;
+        reset-names = "phy",
+                      "hsic";
+        phy_type = "hsic";
+        phy-supply = <&reg_usb3_vbus>;
+        #phy-cells = <0>;
+    };