diff --git a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
index c53f0f5a0b31..2ed8cca79b59 100644
--- a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
+++ b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
@@ -31,6 +31,7 @@ properties:
               - rockchip,px30-usb2phy-grf
               - rockchip,rk3036-grf
               - rockchip,rk3066-grf
+              - rockchip,rk3128-grf
               - rockchip,rk3188-grf
               - rockchip,rk3228-grf
               - rockchip,rk3288-grf
@@ -183,6 +184,7 @@ allOf:
           contains:
             enum:
               - rockchip,px30-usb2phy-grf
+              - rockchip,rk3128-grf
               - rockchip,rk3228-grf
               - rockchip,rk3308-usb2phy-grf
               - rockchip,rk3328-usb2phy-grf