diff --git a/arch/arm64/boot/dts/rockchip/rk3566-bigtreetech-cb2.dtsi b/arch/arm64/boot/dts/rockchip/rk3566-bigtreetech-cb2.dtsi
index e7ba477e75f9..5db1b3ca294d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-bigtreetech-cb2.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3566-bigtreetech-cb2.dtsi
@@ -265,6 +313,8 @@ &gmac1m0_rx_bus2
 			&gmac1m0_rgmii_clk
 			&gmac1m0_clkinout
 			&gmac1m0_rgmii_bus>;
+	tx_delay = <0x19>;
+	rx_delay = <0x05>;
 	status = "okay";
 };