samples/boards/stm32/power_mgmt/serial_wakeup/boards/stm32l562e_dk.overlay

/ {
	chosen {
		/* Comment out these lines to use usart1 as console/shell */
		zephyr,console = &lpuart1;
		zephyr,shell-uart = &lpuart1;
	};
};

&clk_lse {
	status = "okay";
};

&clk_hsi {
	/* Comment out this line to use HSI as clk source */
	status = "disabled";
};

&lpuart1 {
	pinctrl-0 = <&lpuart1_rx_pb10 &lpuart1_tx_pb11>;
	pinctrl-1 = <&analog_pb10 &analog_pb11>;
	pinctrl-names = "default", "sleep";

	clocks = <&rcc STM32_CLOCK_BUS_APB1_2 0x00000001>,
		 <&rcc STM32_SRC_LSE LPUART1_SEL(3)>;

	current-speed = <9600>;

	wakeup-source;

	status = "okay";
};

&usart1 {
	pinctrl-1 = <&analog_pa9 &analog_pa10>;
	pinctrl-names = "default", "sleep";

	/* Uncomment out this line to use usart1 as wakeup source */
	/* wakeup-source; */

	clocks = <&rcc STM32_CLOCK_BUS_APB2 0x00004000>,
		 <&rcc STM32_SRC_HSI USART1_SEL(2)>;

	status = "okay";
};

&usart3 {
	status = "okay";
	pinctrl-1 = <&analog_pc10 &analog_pc11>;
	pinctrl-names = "default", "sleep";
};