dt-bindings: usb: renesas: usb3-peri: convert bindings to json-schema

Convert Renesas USB 3.0 Peripheral controller bindings documentation
to json-schema.

Signed-off-by: Yoshihiro Shimoda <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/renesas,usb3-peri.txt

···
-Renesas Electronics USB3.0 Peripheral driver
-
-Required properties:
-  - compatible: Must contain one of the following:
-	- "renesas,r8a774a1-usb3-peri"
-	- "renesas,r8a774b1-usb3-peri"
-	- "renesas,r8a774c0-usb3-peri"
-	- "renesas,r8a7795-usb3-peri"
-	- "renesas,r8a7796-usb3-peri"
-	- "renesas,r8a77965-usb3-peri"
-	- "renesas,r8a77990-usb3-peri"
-	- "renesas,rcar-gen3-usb3-peri" for a generic R-Car Gen3 or RZ/G2
-	  compatible device
-
-    When compatible with the generic version, nodes must list the
-    SoC-specific version corresponding to the platform first
-    followed by the generic version.
-
-  - reg: Base address and length of the register for the USB3.0 Peripheral
-  - interrupts: Interrupt specifier for the USB3.0 Peripheral
-  - clocks: clock phandle and specifier pair
-
-Optional properties:
-  - phys: phandle + phy specifier pair
-  - phy-names: must be "usb"
-  - usb-role-switch: support role switch. see usb/generic.txt
-
-Sub-nodes:
-- any connector to the data bus of this controller should be modelled using the
-  OF graph bindings specified in bindings/graph.txt, if the "usb-role-switch"
-  property is used.
-
-Example of R-Car H3 ES1.x:
-	usb3_peri0: usb@ee020000 {
-		compatible = "renesas,r8a7795-usb3-peri",
-			     "renesas,rcar-gen3-usb3-peri";
-		reg = <0 0xee020000 0 0x400>;
-		interrupts = <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 328>;
-	};
-
-	usb3_peri1: usb@ee060000 {
-		compatible = "renesas,r8a7795-usb3-peri",
-			     "renesas,rcar-gen3-usb3-peri";
-		reg = <0 0xee060000 0 0x400>;
-		interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 327>;
-	};
-
-Example of RZ/G2E:
-	usb3_peri0: usb@ee020000 {
-		compatible = "renesas,r8a774c0-usb3-peri",
-			     "renesas,rcar-gen3-usb3-peri";
-		reg = <0 0xee020000 0 0x400>;
-		interrupts = <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 328>;
-		companion = <&xhci0>;
-		usb-role-switch;
-
-		port {
-			usb3_role_switch: endpoint {
-				remote-endpoint = <&hd3ss3220_ep>;
-			};
-		};
-	};

Documentation/devicetree/bindings/usb/renesas,usb3-peri.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/renesas,usb3-peri.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas USB 3.0 Peripheral controller
+
+maintainers:
+  - Yoshihiro Shimoda <[e-mail]>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r8a774a1-usb3-peri # RZ/G2M
+          - renesas,r8a774b1-usb3-peri # RZ/G2N
+          - renesas,r8a774c0-usb3-peri # RZ/G2E
+          - renesas,r8a7795-usb3-peri  # R-Car H3
+          - renesas,r8a7796-usb3-peri  # R-Car M3-W
+          - renesas,r8a77965-usb3-peri # R-Car M3-N
+          - renesas,r8a77990-usb3-peri # R-Car E3
+      - const: renesas,rcar-gen3-usb3-peri
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  phys:
+    maxItems: 1
+
+  phy-names:
+    const: usb
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  usb-role-switch:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: Support role switch.
+
+  companion:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle of a companion.
+
+  port:
+    description: |
+      any connector to the data bus of this controller should be modelled
+      using the OF graph bindings specified, if the "usb-role-switch"
+      property is used.
+
+required:
+  - compatible
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a774c0-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a774c0-sysc.h>
+
+    usb3_peri0: usb@ee020000 {
+        compatible = "renesas,r8a774c0-usb3-peri", "renesas,rcar-gen3-usb3-peri";
+        reg = <0 0xee020000 0 0x400>;
+        interrupts = <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD 328>;
+        companion = <&xhci0>;
+        usb-role-switch;
+
+        port {
+            usb3_role_switch: endpoint {
+                remote-endpoint = <&hd3ss3220_ep>;
+            };
+        };
+    };