1 /* 2 * Copyright 2017 - Patrice Chotard <patrice.chotard (at) st.com> 3 * 4 * This file is dual-licensed: you can use it either under the terms 5 * of the GPL or the X11 license, at your option. Note that this dual 6 * licensing only applies to this file, and not this project as a 7 * whole. 8 * 9 * a) This file is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of the 12 * License, or (at your option) any later version. 13 * 14 * This file is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * Or, alternatively, 20 * 21 * b) Permission is hereby granted, free of charge, to any person 22 * obtaining a copy of this software and associated documentation 23 * files (the "Software"), to deal in the Software without 24 * restriction, including without limitation the rights to use, 25 * copy, modify, merge, publish, distribute, sublicense, and/or 26 * sell copies of the Software, and to permit persons to whom the 27 * Software is furnished to do so, subject to the following 28 * conditions: 29 * 30 * The above copyright notice and this permission notice shall be 31 * included in all copies or substantial portions of the Software. 32 * 33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 34 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 35 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 36 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 37 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 38 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 39 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 40 * OTHER DEALINGS IN THE SOFTWARE. 41 */ 42 43 /dts-v1/; 44 #include "stm32h743.dtsi" 45 #include "stm32h743-pinctrl.dtsi" 46 #include <dt-bindings/memory/stm32-sdram.h> 47 48 / { 49 model = "STMicroelectronics STM32H743i-Discovery board"; 50 compatible = "st,stm32h743i-disco", "st,stm32h743"; 51 52 chosen { 53 bootargs = "root=/dev/ram"; 54 stdout-path = "serial0:115200n8"; 55 }; 56 57 memory { 58 reg = <0xd0000000 0x2000000>; 59 }; 60 61 aliases { 62 serial0 = &usart2; 63 mmc0 = &sdmmc1; 64 gpio0 = &gpioa; 65 gpio1 = &gpiob; 66 gpio2 = &gpioc; 67 gpio3 = &gpiod; 68 gpio4 = &gpioe; 69 gpio5 = &gpiof; 70 gpio6 = &gpiog; 71 gpio7 = &gpioh; 72 gpio8 = &gpioi; 73 gpio9 = &gpioj; 74 gpio10 = &gpiok; 75 }; 76 }; 77 78 &usart2 { 79 pinctrl-0 = <&usart2_pins>; 80 pinctrl-names = "default"; 81 status = "okay"; 82 }; 83 84 &fmc { 85 pinctrl-0 = <&fmc_pins>; 86 pinctrl-names = "default"; 87 status = "okay"; 88 89 /* 90 * Memory configuration from sdram datasheet IS42S32800G-6BLI 91 * firsct bank is bank@0 92 * second bank is bank@1 93 */ 94 bank1: bank@1 { 95 st,sdram-control = /bits/ 8 <NO_COL_9 NO_ROW_12 MWIDTH_32 BANKS_4 96 CAS_2 SDCLK_3 RD_BURST_EN RD_PIPE_DL_0>; 97 st,sdram-timing = /bits/ 8 <TMRD_1 TXSR_1 TRAS_1 TRC_6 TRP_2 98 TWR_1 TRCD_1>; 99 st,sdram-refcount = <1539>; 100 }; 101 }; 102 103 &sdmmc1 { 104 status = "okay"; 105 pinctrl-0 = <&sdmmc1_pins>; 106 pinctrl-names = "default"; 107 bus-width = <4>; 108 cd-gpios = <&gpioi 8 1>; 109 }; 110
