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

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