arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Samsung's S3C64XX flattened device tree enabled machine
   4 //
   5 // Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
   6
   7 #include <asm/mach/arch.h>
   8 #include <asm/mach/map.h>
   9 #include <asm/system_misc.h>
  10
  11 #include <plat/cpu.h>
  12 #include <mach/map.h>
  13
  14 #include "common.h"
  15 #include "watchdog-reset.h"
  16
  17 /*
  18  * IO mapping for shared system controller IP.
  19  *
  20  * FIXME: Make remaining drivers use dynamic mapping.
  21  */
  22 static struct map_desc s3c64xx_dt_iodesc[] __initdata = {
  23         {
  24                 .virtual        = (unsigned long)S3C_VA_SYS,
  25                 .pfn            = __phys_to_pfn(S3C64XX_PA_SYSCON),
  26                 .length         = SZ_4K,
  27                 .type           = MT_DEVICE,
  28         },
  29 };
  30
  31 static void __init s3c64xx_dt_map_io(void)
  32 {
  33         debug_ll_io_init();
  34         iotable_init(s3c64xx_dt_iodesc, ARRAY_SIZE(s3c64xx_dt_iodesc));
  35
  36         s3c64xx_init_cpu();
  37
  38         if (!soc_is_s3c64xx())
  39                 panic("SoC is not S3C64xx!");
  40 }
  41
  42 static void __init s3c64xx_dt_init_machine(void)
  43 {
  44         samsung_wdt_reset_of_init();
  45 }
  46
  47 static void s3c64xx_dt_restart(enum reboot_mode mode, const char *cmd)
  48 {
  49         if (mode != REBOOT_SOFT)
  50                 samsung_wdt_reset();
  51
  52         /* if all else fails, or mode was for soft, jump to 0 */
  53         soft_restart(0);
  54 }
  55
  56 static const char *const s3c64xx_dt_compat[] __initconst = {
  57         "samsung,s3c6400",
  58         "samsung,s3c6410",
  59         NULL
  60 };
  61
  62 DT_MACHINE_START(S3C6400_DT, "Samsung S3C64xx (Flattened Device Tree)")
  63         /* Maintainer: Tomasz Figa <tomasz.figa@gmail.com> */
  64         .dt_compat      = s3c64xx_dt_compat,
  65         .map_io         = s3c64xx_dt_map_io,
  66         .init_machine   = s3c64xx_dt_init_machine,
  67         .restart        = s3c64xx_dt_restart,
  68 MACHINE_END