diff --git a/arch/arm/boot/dts/rk3288-phycore-som.dtsi b/arch/arm/boot/dts/rk3288-phycore-som.dtsi
index f13bcb1cd3d9..aaab2d171ffe 100644
--- a/arch/arm/boot/dts/rk3288-phycore-som.dtsi
+++ b/arch/arm/boot/dts/rk3288-phycore-som.dtsi
@@ -151,6 +151,7 @@
 			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 			enet-phy-lane-no-swap;
+			ti,clk-output-sel = <DP83867_CLK_O_SEL_CHN_A_TCLK>;
 		};
 	};
 };