Linux preempt-rt

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/*
 * Copyright (c) 2018 LEDCity AG
 * Copyright (c) 2017 Linaro Limited
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;
#include <nordic/nrf52832_qfaa.dtsi>
#include "feather_connector.dtsi"

/ {
	model = "nRF52 Adafruit Feather";
	compatible = "adafruit,nrf52_adafruit_feather";

	aliases {
		pwm-led0 = &red_pwm_led;
	};

	chosen {
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,bt-mon-uart = &uart0;
		zephyr,bt-c2h-uart = &uart0;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
	};

	/* These aliases are provided for compatibility with samples */
	aliases {
		led0 = &led0;
		led1 = &led1;
		sw0 = &button0;
	};

	leds {
		compatible = "gpio-leds";
		led0: led_0 {
			gpios = <&gpio0 17 0>;
			label = "Red LED";
		};
		led1: led_1 {
			gpios = <&gpio0 19 0>;
			label = "Blue LED";
		};
	};

	pwmleds {
		compatible = "pwm-leds";
		red_pwm_led: pwm_led_0 {
			pwms = <&pwm0 17>;
		};
		blue_pwm_led: pwm_led_1 {
			pwms = <&pwm0 19>;
		};
	};

	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			gpios = <&gpio0 20 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
			label = "Button";
		};
	};
};

&gpiote {
	status = "okay";
};

&gpio0 {
	status = "okay";
};

&uart0 {
	compatible = "nordic,nrf-uart";
	current-speed = <115200>;
	status = "okay";
	tx-pin = <6>;
	rx-pin = <8>;
};

&i2c0 {
	compatible = "nordic,nrf-twi";
	sda-pin = <25>;
	scl-pin = <26>;
};

&flash0 {

	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x00000000 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0x0000C000 0x32000>;
		};
		slot1_partition: partition@3e000 {
			label = "image-1";
			reg = <0x0003E000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x00070000 0xa000>;
		};
		storage_partition: partition@7a000 {
			label = "storage";
			reg = <0x0007a000 0x00006000>;
		};
	};
};

&pwm0 {
	status = "okay";
	ch0-pin = <17>;
	ch0-inverted;
};