1 /*
2 * Samsung's S3C64XX flattened device tree enabled machine
3 *
4 * Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/of_platform.h>
12
13 #include <asm/mach/arch.h>
14 #include <asm/mach/map.h>
15 #include <asm/system_misc.h>
16
17 #include <plat/cpu.h>
18 #include <mach/map.h>
19
20 #include "common.h"
21 #include "watchdog-reset.h"
22
23 /*
24 * IO mapping for shared system controller IP.
25 *
26 * FIXME: Make remaining drivers use dynamic mapping.
27 */
28 static struct map_desc s3c64xx_dt_iodesc[] __initdata = {
29 {
30 .virtual = (unsigned long)S3C_VA_SYS,
31 .pfn = __phys_to_pfn(S3C64XX_PA_SYSCON),
32 .length = SZ_4K,
33 .type = MT_DEVICE,
34 },
35 };
36
s3c64xx_dt_map_io(void)37 static void __init s3c64xx_dt_map_io(void)
38 {
39 debug_ll_io_init();
40 iotable_init(s3c64xx_dt_iodesc, ARRAY_SIZE(s3c64xx_dt_iodesc));
41
42 s3c64xx_init_cpu();
43
44 if (!soc_is_s3c64xx())
45 panic("SoC is not S3C64xx!");
46 }
47
s3c64xx_dt_init_machine(void)48 static void __init s3c64xx_dt_init_machine(void)
49 {
50 samsung_wdt_reset_of_init();
51 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
52 }
53
s3c64xx_dt_restart(enum reboot_mode mode,const char * cmd)54 static void s3c64xx_dt_restart(enum reboot_mode mode, const char *cmd)
55 {
56 if (mode != REBOOT_SOFT)
57 samsung_wdt_reset();
58
59 /* if all else fails, or mode was for soft, jump to 0 */
60 soft_restart(0);
61 }
62
63 static const char *const s3c64xx_dt_compat[] __initconst = {
64 "samsung,s3c6400",
65 "samsung,s3c6410",
66 NULL
67 };
68
69 DT_MACHINE_START(S3C6400_DT, "Samsung S3C64xx (Flattened Device Tree)")
70 /* Maintainer: Tomasz Figa <tomasz.figa@gmail.com> */
71 .dt_compat = s3c64xx_dt_compat,
72 .map_io = s3c64xx_dt_map_io,
73 .init_machine = s3c64xx_dt_init_machine,
74 .restart = s3c64xx_dt_restart,
75 MACHINE_END
76