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		gpio0 = &gpioa;
64		gpio1 = &gpiob;
65		gpio2 = &gpioc;
66		gpio3 = &gpiod;
67		gpio4 = &gpioe;
68		gpio5 = &gpiof;
69		gpio6 = &gpiog;
70		gpio7 = &gpioh;
71		gpio8 = &gpioi;
72		gpio9 = &gpioj;
73		gpio10 = &gpiok;
74	};
75};
76
77&usart2 {
78	pinctrl-0 = <&usart2_pins>;
79	pinctrl-names = "default";
80	status = "okay";
81};
82
83&fmc {
84	pinctrl-0 = <&fmc_pins>;
85	pinctrl-names = "default";
86	status = "okay";
87
88	/*
89	 * Memory configuration from sdram datasheet IS42S32800G-6BLI
90	 * firsct bank is bank@0
91	 * second bank is bank@1
92	 */
93	bank1: bank@1 {
94		st,sdram-control = /bits/ 8 <NO_COL_9 NO_ROW_12 MWIDTH_32 BANKS_4
95				  CAS_2 SDCLK_3 RD_BURST_EN RD_PIPE_DL_0>;
96		st,sdram-timing = /bits/ 8 <TMRD_1 TXSR_1 TRAS_1 TRC_6 TRP_2
97				  TWR_1 TRCD_1>;
98		st,sdram-refcount = <1539>;
99	};
100};
101