diff --git a/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
index 68498d560354..a86deddefd86 100644
--- a/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
+++ b/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
@@ -5,6 +5,7 @@ Required properties:
      "rockchip,rk3066a-usb-phy"
      "rockchip,rk3188-usb-phy"
      "rockchip,rk3288-usb-phy"
+     "rockchip,rk336x-usb-phy"
  - rockchip,grf : phandle to the syscon managing the "general
    register files"
  - #address-cells: should be 1