LXR linux/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 */
  22static 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
  31static 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
  42static void __init s3c64xx_dt_init_machine(void)
  43{
  44        samsung_wdt_reset_of_init();
  45}
  46
  47static 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
  56static const char *const s3c64xx_dt_compat[] __initconst = {
  57        "samsung,s3c6400",
  58        "samsung,s3c6410",
  59        NULL
  60};
  61
  62DT_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,
  68MACHINE_END
  69