dt-binding: Add JH7110 USB wrapper layer doc.

The dt-binding doc of Cadence USBSS-DRD controller wrapper
layer.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
Reviewed-by: Peter Chen <peter.chen@kernel.org>

diff --git a/Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml b/Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml
new file mode 100644 (file)
index 0000000..b1a8dc6
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml
@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/starfive,jh7110-usb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7110 wrapper module for the Cadence USBSS-DRD controller
+
+maintainers:
+  - Minda Chen <minda.chen@starfivetech.com>
+
+properties:
+  compatible:
+    const: starfive,jh7110-usb
+
+  clocks:
+    items:
+      - description: lpm clock
+      - description: stb clock
+      - description: apb clock
+      - description: axi clock
+      - description: utmi apb clock
+
+  clock-names:
+    items:
+      - const: lpm
+      - const: stb
+      - const: apb
+      - const: axi
+      - const: utmi_apb
+
+  resets:
+    items:
+      - description: PWRUP reset
+      - description: APB reset
+      - description: AXI reset
+      - description: UTMI_APB reset
+
+  starfive,sys-syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      items:
+        - description: phandle to System Register Controller sys_syscon node.
+        - description: offset of SYS_SYSCONSAIF__SYSCFG register for USB.
+    description:
+      The phandle to System Register Controller syscon node and the offset
+      of SYS_SYSCONSAIF__SYSCFG register for USB.
+
+  starfive,stg-syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      items:
+        - description: phandle to System Register Controller stg_syscon node.
+        - description: register0 offset of STG_SYSCONSAIF__SYSCFG register for USB.
+        - description: register1 offset of STG_SYSCONSAIF__SYSCFG register for USB.
+        - description: register2 offset of STG_SYSCONSAIF__SYSCFG register for USB.
+        - description: register3 offset of STG_SYSCONSAIF__SYSCFG register for USB.
+    description:
+      The phandle to System Register Controller syscon node and the offset
+      of STG_SYSCONSAIF__SYSCFG register for USB. Total 4 regsisters offset
+      for USB.
+
+  "#address-cells":
+    maximum: 2
+
+  "#size-cells":
+    maximum: 2
+
+  ranges: true
+
+patternProperties:
+  "^usb@[0-9a-f]+$":
+    type: object
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - resets
+  - starfive,sys-syscon
+  - starfive,stg-syscon
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    usb@10100000 {
+      compatible = "starfive,jh7110-usb";
+      clocks = <&syscrg 4>,
+               <&stgcrg 5>,
+               <&stgcrg 1>,
+               <&stgcrg 3>,
+               <&stgcrg 2>;
+      clock-names = "lpm", "stb", "apb", "axi", "utmi_apb";
+      resets = <&stgcrg 10>,
+               <&stgcrg 8>,
+               <&stgcrg 7>,
+               <&stgcrg 9>;
+      starfive,stg-syscon = <&stg_syscon 0x4 0xc4 0x148 0x1f4>;
+      starfive,sys-syscon = <&sys_syscon 0x18>;
+      #address-cells = <1>;
+      #size-cells = <1>;
+      ranges = <0x0 0x10100000 0x100000>;
+
+      usb@0 {
+        compatible = "cdns,usb3";
+        reg = <0x0 0x10000>,
+              <0x10000 0x10000>,
+              <0x20000 0x10000>;
+        reg-names = "otg", "xhci", "dev";
+        interrupts = <100>, <108>, <110>;
+        interrupt-names = "host", "peripheral", "otg";
+        maximum-speed = "super-speed";
+        dr_mode = "host";
+      };
+    };