Linux preempt-rt

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/*
 * Copyright (c) 2020 Analog Life LLC
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;
#include <nordic/nrf52840_qiaa.dtsi>

/ {
	model = "nRF52840 BLE Cell";
	compatible = "nordic,nrf52840-ble-cell";

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

&gpiote {
	status = "okay";
};

&gpio0 {
	status = "okay";
};

&gpio1 {
	status = "okay";
};

&uart0 {
	compatible = "nordic,nrf-uart";
	status = "okay";
	current-speed = <115200>;

	tx-pin = <7>;
	rx-pin = <6>;
};

arduino_serial: &uart1 {
	status = "okay";
	current-speed = <115200>;

	/* UART Pin info. */
	rx-pin  = <20>;
	tx-pin  = <24>;
	rts-pin = <17>;
	cts-pin = <16>;

	/* Use hardware flow control. */
	hw-flow-control;

	/* BG9x description. */
	quectel_bg9x {
		compatible = "quectel,bg9x";
		label      = "quectel-bg9x";
		status     = "okay";

		mdm-power-gpios = <&gpio1 5  0>;
		mdm-reset-gpios = <&gpio1 6  0>;
		mdm-dtr-gpios   = <&gpio0 22 0>;
	};
};

arduino_i2c: &i2c0 {
	compatible = "nordic,nrf-twi";
	status = "okay";
	sda-pin = <27>;
	scl-pin = <26>;
};

&spi2 {
	compatible = "nordic,nrf-spi";
	status = "okay";
	sck-pin  = <19>;
	mosi-pin = <23>;
	miso-pin = <21>;

	/* This SPI device is interfaced with the SD card. */
};

&flash0 {

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

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x000000000 0x0000C000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0x0000C000 0x00067000>;
		};
		slot1_partition: partition@73000 {
			label = "image-1";
			reg = <0x00073000 0x00067000>;
		};
		scratch_partition: partition@da000 {
			label = "image-scratch";
			reg = <0x000da000 0x0001e000>;
		};

		/*
		 * The flash starting at 0x000f8000 and ending at
		 * 0x000fffff is reserved for use by the application.
		 */

		/*
		 * Storage partition will be used by FCB/LittleFS/NVS
		 * if enabled.
		 */
		storage_partition: partition@f8000 {
			label = "storage";
			reg = <0x000f8000 0x00008000>;
		};
	};
};