diff --git a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
index 43c288708f6752187136efb262cc18581abb8c68..8c1c46fef1578bda3d534ac364dac3fa6198480d 100644
--- a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
+++ b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
@@ -31,6 +31,7 @@ properties:
               - rockchip,rk3308-core-grf
               - rockchip,rk3308-detect-grf
               - rockchip,rk3308-grf
+              - rockchip,rk3308-usb2phy-grf
               - rockchip,rk3328-grf
               - rockchip,rk3328-usb2phy-grf
               - rockchip,rk3368-grf
@@ -174,6 +175,7 @@ allOf:
             enum:
               - rockchip,px30-usb2phy-grf
               - rockchip,rk3228-grf
+              - rockchip,rk3308-usb2phy-grf
               - rockchip,rk3328-usb2phy-grf
               - rockchip,rk3399-grf
               - rockchip,rv1108-grf