/ { aliases { led0 = &user_led; }; leds { compatible = "gpio-leds"; user_led: user_led_0 { gpios = <&gpiob 0 GPIO_ACTIVE_HIGH>; label = "USER_LED_0"; }; }; }; &uart4 { status = "okay"; current-speed = <921600>; pinctrl-0 = <&uart4_tx_pa0 &uart4_rx_pd0>; pinctrl-names = "default"; }; &usart3 { status = "okay"; }; &timers1 { status = "okay"; st,prescaler = <0>; /* Required */ pwm0: pwm { compatible = "st,stm32-pwm"; status = "okay"; pinctrl-0 = <&tim1_ch1_pa8>; pinctrl-names = "default"; }; };