LXR linux/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 */
  26static 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
  35static 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
  46static void __init s3c64xx_dt_init_machine(void)
  47{
  48        samsung_wdt_reset_of_init();
  49}
  50
  51static 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
  60static const char *const s3c64xx_dt_compat[] __initconst = {
  61        "samsung,s3c6400",
  62        "samsung,s3c6410",
  63        NULL
  64};
  65
  66DT_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,
  72MACHINE_END
  73