diff --git a/arch/arm/boot/dts/orion5x-lacie-ethernet-disk-mini-v2.dts b/arch/arm/boot/dts/orion5x-lacie-ethernet-disk-mini-v2.dts
index 83f45a722055..ba43197d0873 100644
--- a/arch/arm/boot/dts/orion5x-lacie-ethernet-disk-mini-v2.dts
+++ b/arch/arm/boot/dts/orion5x-lacie-ethernet-disk-mini-v2.dts
@@ -73,6 +73,5 @@ &sata {
 };
 
 &uart0 {
-	clock-frequency = <166666667>;
 	status = "okay";
 };
diff --git a/arch/arm/boot/dts/orion5x.dtsi b/arch/arm/boot/dts/orion5x.dtsi
index ad23ff40e0d1..88df8a811ad3 100644
--- a/arch/arm/boot/dts/orion5x.dtsi
+++ b/arch/arm/boot/dts/orion5x.dtsi
@@ -65,7 +65,7 @@ uart0: serial@12000 {
 				reg = <0x12000 0x100>;
 				reg-shift = <2>;
 				interrupts = <3>;
-				/* set clock-frequency in board dts */
+				clocks = <&core_clk 0>;
 				status = "disabled";
 			};
 
@@ -74,7 +74,7 @@ uart1: serial@12100 {
 				reg = <0x12100 0x100>;
 				reg-shift = <2>;
 				interrupts = <4>;
-				/* set clock-frequency in board dts */
+				clocks = <&core_clk 0>;
 				status = "disabled";
 			};