diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index f7bcd6435f39..d51608d30ede 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -766,6 +766,39 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	usart1_pins_b: usart1-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 8, AF6)>; /* USART1_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 10, AF6)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
+	/omit-if-no-ref/
+	usart1_idle_pins_b: usart1-idle-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 8, ANALOG)>; /* USART1_TX */
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 10, AF6)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
+	/omit-if-no-ref/
+	usart1_sleep_pins_b: usart1-sleep-1 {
+		pins {
+			pinmux = <STM32_PINMUX('B', 8, ANALOG)>, /* USART1_TX */
+				 <STM32_PINMUX('B', 10, ANALOG)>; /* USART1_RX */
+		};
+	};
+
 	/omit-if-no-ref/
 	usart2_pins_a: usart2-0 {
 		pins1 {