diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
index 1ff374a577ee..98c2ac781f8a 100644
--- a/arch/arm/boot/dts/aspeed-ast2600-evb.dts
+++ b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
@@ -154,6 +154,21 @@ &mac3 {
 	pinctrl-0 = <&pinctrl_rgmii4_default>;
 };
 
+&syscon {
+	mac0-clk-delay = <0x10 0x0a
+			  0x10 0x10
+			  0x10 0x10>;
+	mac1-clk-delay = <0x10 0x0a
+			  0x10 0x10
+			  0x10 0x10>;
+	mac2-clk-delay = <0x08 0x04
+			  0x08 0x04
+			  0x08 0x04>;
+	mac3-clk-delay = <0x08 0x04
+			  0x08 0x04
+			  0x08 0x04>;
+};
+
 &emmc_controller {
 	status = "okay";
 };