diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
index eaa3fdbb0c02..48da77e3cb1f 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
@@ -1910,6 +1910,15 @@
 						};
 					};
 
+					uart_ao_b_pins: uart-b-ao {
+						mux {
+							groups = "uart_ao_b_tx_8",
+								 "uart_ao_b_rx_9";
+							function = "uart_ao_b";
+							bias-disable;
+						};
+					};
+
 					uart_ao_a_pins: uart-a-ao {
 						mux {
 							groups = "uart_ao_a_tx",
diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi
index b993de83e970..29d7c768dec2 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi
@@ -459,6 +459,12 @@
 	pinctrl-names = "default";
 };
 
+&uart_AO_B {
+	status = "disabled";
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart_ao_b_pins>;
+};
+
 &uart_A {
 	status = "disabled";
 	pinctrl-names = "default";