diff --git a/arch/arm64/boot/dts/amlogic/mesonsm1_odroid_common.dtsi b/arch/arm64/boot/dts/amlogic/mesonsm1_odroid_common.dtsi
index fbea3a3a52e4..609314e59f41 100644
--- a/arch/arm64/boot/dts/amlogic/mesonsm1_odroid_common.dtsi
+++ b/arch/arm64/boot/dts/amlogic/mesonsm1_odroid_common.dtsi
@@ -166,6 +166,14 @@
 	clock-frequency = <100000>;		/* default 100k */
 };
 
+&a_uart_pins {
+	mux{
+		groups = "uart_tx_a",
+			"uart_rx_a";
+		function = "uart_a";
+	};
+};
+
 &usb2_phy_v2 {
 	status = "okay";
 	portnum = <2>;