dt-bindings: phy: Add StarFive JH7110 USB document

Add StarFive JH7110 SoC USB 2.0 PHY dt-binding.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
[Backported from https://github.com/starfive-tech/linux/tree/JH7110_VisionFive2_upstream]
Change-Id: I402d255181b5ff3a14e2faea7f54753f83757cd2
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>

diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
new file mode 100644 (file)
index 0000000..80604df
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/starfive,jh7110-usb-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive USB 2.0 PHY
+
+maintainers:
+  - Minda Chen <minda.chen@starfivetech.com>
+
+properties:
+  compatible:
+    const: starfive,jh7110-usb-phy
+
+  reg:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+  clocks:
+    items:
+      - description: usb 125m clock
+      - description: app 125m clock
+
+  clock-names:
+    items:
+      - const: 125m
+      - const: app_125
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@10200000 {
+      compatible = "starfive,jh7110-usb-phy";
+      reg = <0x10200000 0x10000>;
+      clocks = <&syscrg 95>,
+               <&stgcrg 6>;
+      clock-names = "125m", "app_125";
+      #phy-cells = <0>;
+    };