u-boot/arch/arm/dts/stm32h743i-disco.dts

/*
 * Copyright 2017 - Patrice Chotard <patrice.chotard@st.com>
 *
 * 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.
 */

/dts-v1/;
#include "stm32h743.dtsi"
#include "stm32h743-pinctrl.dtsi"
#include <dt-bindings/memory/stm32-sdram.h>

/ {
	model = "STMicroelectronics STM32H743i-Discovery board";
	compatible = "st,stm32h743i-disco", "st,stm32h743";

	chosen {
		bootargs = "root=/dev/ram";
		stdout-path = "serial0:115200n8";
	};

	memory {
		reg = <0xd0000000 0x2000000>;
	};

	aliases {
		serial0 = &usart2;
		mmc0 = &sdmmc1;
		gpio0 = &gpioa;
		gpio1 = &gpiob;
		gpio2 = &gpioc;
		gpio3 = &gpiod;
		gpio4 = &gpioe;
		gpio5 = &gpiof;
		gpio6 = &gpiog;
		gpio7 = &gpioh;
		gpio8 = &gpioi;
		gpio9 = &gpioj;
		gpio10 = &gpiok;
	};
};

&usart2 {
	pinctrl-0 = <&usart2_pins>;
	pinctrl-names = "default";
	status = "okay";
};

&fmc {
	pinctrl-0 = <&fmc_pins>;
	pinctrl-names = "default";
	status = "okay";

	/*
	 * Memory configuration from sdram datasheet IS42S32800G-6BLI
	 * firsct bank is bank@0
	 * second bank is bank@1
	 */
	bank1: bank@1 {
		st,sdram-control = /bits/ 8 <NO_COL_9 NO_ROW_12 MWIDTH_32 BANKS_4
				  CAS_2 SDCLK_3 RD_BURST_EN RD_PIPE_DL_0>;
		st,sdram-timing = /bits/ 8 <TMRD_1 TXSR_1 TRAS_1 TRC_6 TRP_2
				  TWR_1 TRCD_1>;
		st,sdram-refcount = <1539>;
	};
};

&sdmmc1 {
	status = "okay";
	pinctrl-0 = <&sdmmc1_pins>;
	pinctrl-names = "default";
	bus-width = <4>;
	cd-gpios = <&gpioi 8 1>;
};