Linux preempt-rt

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/*
 * Copyright (c) 2018 Centaur Analytics, Inc
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;
#include <st/l4/stm32l496Xg.dtsi>
#include <st/l4/stm32l496z(e-g)tx-pinctrl.dtsi>
#include "arduino_r3_connector.dtsi"

/ {
	model = "STMicroelectronics STM32L496ZG-NUCLEO board";
	compatible = "st,stm32l496zg-nucleo";

	chosen {
		zephyr,console = &lpuart1;
		zephyr,shell-uart = &lpuart1;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
	};

	leds {
		compatible = "gpio-leds";
		green_led_1: led_1 {
			gpios = <&gpioc 7 GPIO_ACTIVE_HIGH>;
			label = "User LD1";
		};
		blue_led_2: led_2 {
			gpios = <&gpiob 7 GPIO_ACTIVE_HIGH>;
			label = "User LD2";
		};
		red_led_3: led_3 {
			gpios = <&gpiob 14 GPIO_ACTIVE_HIGH>;
			label = "User LD3";
		};
	};

	pwmleds {
		compatible = "pwm-leds";

		red_pwm_led: red_pwm_led {
			pwms = <&pwm15 1 4 PWM_POLARITY_NORMAL>;
		};
	};

	gpio_keys {
		compatible = "gpio-keys";
		user_button: button {
			label = "User Button";
			gpios = <&gpioc 13 GPIO_ACTIVE_HIGH>;
		};
	};

	aliases {
		led0 = &green_led_1;
		led1 = &blue_led_2;
		led2 = &red_led_3;
		pwm-led0 = &red_pwm_led;
		sw0 = &user_button;
	};
};

&clk_hsi {
	status = "okay";
};

&pll {
	div-m = <1>;
	mul-n = <20>;
	div-p = <7>;
	div-q = <2>;
	div-r = <4>;
	clocks = <&clk_hsi>;
	status = "okay";
};

&rcc {
	clocks = <&pll>;
	clock-frequency = <DT_FREQ_M(80)>;
	ahb-prescaler = <1>;
	apb1-prescaler = <1>;
	apb2-prescaler = <1>;
};

&usart2 {
	pinctrl-0 = <&usart2_tx_pd5 &usart2_rx_pd6>;
	current-speed = <115200>;
	status = "okay";
};

&usart3 {
	current-speed = <115200>;
	status = "okay";
};

&lpuart1 {
	pinctrl-0 = <&lpuart1_tx_pg7 &lpuart1_rx_pg8>;
	current-speed = <115200>;
	status = "okay";
};

&timers1 {
	status = "okay";

	pwm1: pwm {
		status = "okay";
		st,prescaler = <10000>;
		pinctrl-0 = <&tim1_ch1_pe9
			     &tim1_ch2_pe11
			     &tim1_ch3_pe13>;
	};
};

&timers2 {
	status = "okay";

	pwm2: pwm {
		status = "okay";
		pinctrl-0 = <&tim2_ch1_pa0>;
	};
};

&timers15 {
	status = "okay";

	pwm15: pwm {
		status = "okay";
		st,prescaler = <10000>;
		pinctrl-0 = <&tim15_ch1_pb14>;
	};
};

&i2c1 {
	pinctrl-0 = <&i2c1_scl_pb8 &i2c1_sda_pb9>;
	status = "okay";
	clock-frequency = <I2C_BITRATE_FAST>;
};

&spi1 {
	pinctrl-0 = <&spi1_sck_pa5 &spi1_miso_pa6 &spi1_mosi_pa7>;
	cs-gpios = <&gpiod 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
	status = "okay";
};

&rtc {
	status = "okay";
};

&wwdg {
	status = "okay";
};