Linux preempt-rt

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/*
 * Copyright (c) 2017 Linaro Limited
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;
#include <st/l4/stm32l496Xg.dtsi>

/ {
	model = "STMicroelectronics STM32L496G-DISCO board";
	compatible = "st,stm32l496g-disco", "st,stm32l496";

	chosen {
		zephyr,console = &usart2;
		zephyr,shell-uart = &usart2;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
	};

	leds {
		compatible = "gpio-leds";
		green_led_2: led_2 {
			gpios = <&gpiob 13 GPIO_ACTIVE_HIGH>;
			label = "User LD2";
		};
	};

	gpio_keys {
		compatible = "gpio-keys";
		joy_sel: joystick_select {
			label = "joystick select";
			gpios = <&gpioc 13 GPIO_ACTIVE_LOW>;
		};
		joy_down: joystick_down {
			label = "joystick down";
			gpios = <&gpioi 10 GPIO_ACTIVE_LOW>;
		};
		joy_up: joystick_up {
			label = "joystick up";
			gpios = <&gpioi 8 GPIO_ACTIVE_LOW>;
		};
		joy_left: joystick_left {
			label = "joystick left";
			gpios = <&gpioi 9 GPIO_ACTIVE_LOW>;
		};
		joy_right: joystick_right {
			label = "joystick right";
			gpios = <&gpiof 11 GPIO_ACTIVE_LOW>;
		};
	};

	aliases {
		led0 = &green_led_2;
		sw0 = &joy_sel;
	};
};

arduino_i2c: &i2c1 {};
arduino_spi: &spi1 {};
arduino_serial: &lpuart1 {};

&usart1 {
	current-speed = <115200>;
	status = "okay";
};

&usart2 {
	current-speed = <115200>;
	status = "okay";
};

&lpuart1 {
	current-speed = <115200>;
	status = "okay";
};

&timers2 {
	status = "okay";

	pwm {
		status = "okay";
	};
};

&i2c1 {
	status = "okay";
	clock-frequency = <I2C_BITRATE_FAST>;
};

&spi1 {
	status = "okay";
};

&rtc {
	status = "okay";
};