arch/arm64/boot/dts/freescale/fsl-imx8mm-evk-m4.dts

/*
 * Copyright 2018 NXP
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include "fsl-imx8mm-evk.dts"

/ {
	reserved-memory {
		#address-cells = <2>;
		#size-cells = <2>;
		ranges;

		m4_reserved: m4@0x80000000 {
			no-map;
			reg = <0 0x80000000 0 0x1000000>;
		};

	};

	rpmsg_i2s: rpmsg-i2s {
		compatible = "fsl,imx8mq-rpmsg-i2s";
		/* the audio device index in m4 domain */
		fsl,audioindex = <0> ;
		fsl,dma-buffer-size = <0x6000000>;
		fsl,enable-lpa;
		status = "okay";
	};

	sound-rpmsg {
		compatible = "fsl,imx-audio-rpmsg";
		model = "ak4497-audio";
		cpu-dai = <&rpmsg_i2s>;
		rpmsg-out;
	};

};

/*
 * ATTENTION: M4 may use IPs like below
 * ECSPI0/ECSPI2, GPIO1/GPIO5, GPT1, I2C3, I2S3, WDOG1, UART4, PWM3, SDMA1
 */

&i2c3 {
	status = "disabled";
};

&rpmsg{
	/*
	 * 64K for one rpmsg instance:
	 * --0xb8000000~0xb800ffff: pingpong
	 */
	vdev-nums = <1>;
	reg = <0x0 0xb8000000 0x0 0x10000>;
	status = "okay";
};

&sdma1{
	status = "disabled";
};

&uart4 {
	status = "disabled";
};

&sdma3 {
	status = "disabled";
};

&sai1 {
	status = "disabled";
};

&flexspi {
	status = "disabled";
};