linux_dsm_epyc7002/arch/arm/boot/dts/armada-xp-db-dxbc2.dts

/*
 * Device Tree file for DB-DXBC2 board
 *
 * Copyright (C) 2016 Allied Telesis Labs
 *
 * Based on armada-xp-db.dts
 *
 * This file is dual-licensed: you can use it either under the terms
 * of the GPL or the X11 license, at your option. Note that this dual
 * licensing only applies to this file, and not this project as a
 * whole.
 *
 *  a) This file 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 file 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.
 *
 * Or, alternatively,
 *
 *  b) Permission is hereby granted, free of charge, to any person
 *     obtaining a copy of this software and associated documentation
 *     files (the "Software"), to deal in the Software without
 *     restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or
 *     sell copies of the Software, and to permit persons to whom the
 *     Software is furnished to do so, subject to the following
 *     conditions:
 *
 *     The above copyright notice and this permission notice shall be
 *     included in all copies or substantial portions of the Software.
 *
 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *     OTHER DEALINGS IN THE SOFTWARE.
 *
 * Note: this Device Tree assumes that the bootloader has remapped the
 * internal registers to 0xf1000000 (instead of the default
 * 0xd0000000). The 0xf1000000 is the default used by the recent,
 * DT-capable, U-Boot bootloaders provided by Marvell. Some earlier
 * boards were delivered with an older version of the bootloader that
 * left internal registers mapped at 0xd0000000. If you are in this
 * situation, you should either update your bootloader (preferred
 * solution) or the below Device Tree should be adjusted.
 */

/dts-v1/;
#include "armada-xp-98dx4251.dtsi"

/ {
	model = "Marvell Bobcat2 Evaluation Board";
	compatible = "marvell,db-dxbc2", "marvell,armadaxp-98dx4251", "marvell,armadaxp", "marvell,armada-370-xp";

	chosen {
		bootargs = "console=ttyS0,115200 earlyprintk";
	};

	memory {
		device_type = "memory";
		reg = <0 0x00000000 0 0x20000000>; /* 512 MB */
	};

};

&devbus_bootcs {
	status = "okay";

	/* Device Bus parameters are required */

	/* Read parameters */
	devbus,bus-width    = <16>;
	devbus,turn-off-ps  = <60000>;
	devbus,badr-skew-ps = <0>;
	devbus,acc-first-ps = <124000>;
	devbus,acc-next-ps  = <248000>;
	devbus,rd-setup-ps  = <0>;
	devbus,rd-hold-ps   = <0>;

	/* Write parameters */
	devbus,sync-enable = <0>;
	devbus,wr-high-ps  = <60000>;
	devbus,wr-low-ps   = <60000>;
	devbus,ale-wr-ps   = <60000>;
};

&i2c0 {
	clock-frequency = <100000>;
	status = "okay";
};

&uart0 {
	status = "okay";
};

&uart1 {
	status = "okay";
};

&nand {
	status = "okay";
	num-cs = <1>;
	marvell,nand-keep-config;
	marvell,nand-enable-arbiter;
	nand-on-flash-bbt;
	nand-ecc-strength = <4>;
	nand-ecc-step-size = <512>;
};

&sdio {
	pinctrl-0 = <&sdio_pins>;
	pinctrl-names = "default";
	status = "okay";
	/* No CD or WP GPIOs */
	broken-cd;
};

&spi0 {
	status = "okay";

	spi-flash@0 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "m25p64";
		reg = <0>; /* Chip select 0 */
		spi-max-frequency = <20000000>;
		m25p,fast-read;

		partition@u-boot {
			reg = <0x00000000 0x00100000>;
			label = "u-boot";
		};
		partition@u-boot-env {
			reg = <0x00100000 0x00040000>;
			label = "u-boot-env";
		};
		partition@unused {
			reg = <0x00140000 0x00ec0000>;
			label = "unused";
		};

	};
};