diff --git a/arch/arm64/boot/dts/mediatek/mt6797-x20-dev.dts b/arch/arm64/boot/dts/mediatek/mt6797-x20-dev.dts
index 742938a1a548..13939d55b85b 100644
--- a/arch/arm64/boot/dts/mediatek/mt6797-x20-dev.dts
+++ b/arch/arm64/boot/dts/mediatek/mt6797-x20-dev.dts
@@ -30,4 +30,6 @@ chosen {
 
 &uart1 {
 	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins_a>;
 };
diff --git a/arch/arm64/boot/dts/mediatek/mt6797.dtsi b/arch/arm64/boot/dts/mediatek/mt6797.dtsi
index 231230d32d09..a64bb84bdec3 100644
--- a/arch/arm64/boot/dts/mediatek/mt6797.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt6797.dtsi
@@ -141,6 +141,13 @@ pio: pinctrl@10005000 {
 			    "iocfgr", "iocfgt";
 		gpio-controller;
 		#gpio-cells = <2>;
+
+		uart1_pins_a: uart1 {
+			pins1 {
+				pinmux = <MT6797_GPIO232__FUNC_URXD1>,
+					 <MT6797_GPIO233__FUNC_UTXD1>;
+			};
+		};
 	};
 
 	scpsys: scpsys@10006000 {