diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revB.dts b/arch/arm/dts/zynqmp-sck-kr-g-revB.dts
index 401de9e..f9d8755 100644
--- a/arch/arm/dts/zynqmp-sck-kr-g-revB.dts
+++ b/arch/arm/dts/zynqmp-sck-kr-g-revB.dts
@@ -188,6 +188,7 @@
 	phy-handle = <&phy0>;
 	phy-mode = "sgmii";
 	is-internal-pcspma;
+	assigned-clock-rates = <250000000>;
 };
 
 &gem1 { /* mdio mio50/51, gem mio38 - mio49 */
@@ -196,6 +197,7 @@
 	pinctrl-0 = <&pinctrl_gem1_default>;
 	phy-handle = <&phy1>;
 	phy-mode = "rgmii-id";
+	assigned-clock-rates = <250000000>;
 
 	mdio: mdio {
 		#address-cells = <1>;