diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
index 5c2b4296f886..996a76c7fd19 100644
--- a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
+++ b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
@@ -89,6 +89,7 @@ grf: syscon@ff770000 {
 Required properties (usb2phy grf node):
  - compatible : should be one of the listed compatibles:
 		"rockchip,px30-usb2phy-grf", "syscon", "simple-mfd";
+		"rockchip,rk1808-usb2phy-grf", "syscon", "simple-mfd";
 		"rockchip,rk3308-usb2phy-grf", "syscon", "simple-mfd";
 		"rockchip,rk3328-usb2phy-grf", "syscon", "simple-mfd";
  - reg : the address offset of grf for usb-phy configuration.