1/*
2 * Copyright 2017 - Patrice Chotard <patrice.chotard@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