arch/arm/mach-s5pv210/s5pv210.c

   1 /*
   2  * Samsung's S5PC110/S5PV210 flattened device tree enabled machine.
   3  *
   4  * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
   5  * Mateusz Krawczuk <m.krawczuk@partner.samsung.com>
   6  * Tomasz Figa <t.figa@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/of_fdt.h>
  14 #include <linux/of_platform.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <asm/system_misc.h>
  19
  20 #include <plat/map-base.h>
  21
  22 #include "common.h"
  23 #include "regs-clock.h"
  24
  25 static int __init s5pv210_fdt_map_sys(unsigned long node, const char *uname,
  26                                         int depth, void *data)
  27 {
  28         struct map_desc iodesc;
  29         const __be32 *reg;
  30         int len;
  31
  32         if (!of_flat_dt_is_compatible(node, "samsung,s5pv210-clock"))
  33                 return 0;
  34
  35         reg = of_get_flat_dt_prop(node, "reg", &len);
  36         if (reg == NULL || len != (sizeof(unsigned long) * 2))
  37                 return 0;
  38
  39         iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
  40         iodesc.length = be32_to_cpu(reg[1]) - 1;
  41         iodesc.virtual = (unsigned long)S3C_VA_SYS;
  42         iodesc.type = MT_DEVICE;
  43         iotable_init(&iodesc, 1);
  44
  45         return 1;
  46 }
  47
  48 static void __init s5pv210_dt_map_io(void)
  49 {
  50         debug_ll_io_init();
  51
  52         of_scan_flat_dt(s5pv210_fdt_map_sys, NULL);
  53 }
  54
  55 static void s5pv210_dt_restart(enum reboot_mode mode, const char *cmd)
  56 {
  57         __raw_writel(0x1, S5P_SWRESET);
  58 }
  59
  60 static void __init s5pv210_dt_init_late(void)
  61 {
  62         platform_device_register_simple("s5pv210-cpufreq", -1, NULL, 0);
  63         s5pv210_pm_init();
  64 }
  65
  66 static char const *const s5pv210_dt_compat[] __initconst = {
  67         "samsung,s5pc110",
  68         "samsung,s5pv210",
  69         NULL
  70 };
  71
  72 DT_MACHINE_START(S5PV210_DT, "Samsung S5PC110/S5PV210-based board")
  73         .dt_compat = s5pv210_dt_compat,
  74         .map_io = s5pv210_dt_map_io,
  75         .restart = s5pv210_dt_restart,
  76         .init_late = s5pv210_dt_init_late,
  77 MACHINE_END