arch/arm/mach-s5pv210/s5pv210.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Samsung's S5PC110/S5PV210 flattened device tree enabled machine.
   4 //
   5 // Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
   6 // Mateusz Krawczuk <m.krawczuk@partner.samsung.com>
   7 // Tomasz Figa <t.figa@samsung.com>
   8
   9 #include <linux/of_fdt.h>
  10 #include <linux/of_platform.h>
  11
  12 #include <asm/mach/arch.h>
  13 #include <asm/mach/map.h>
  14 #include <asm/system_misc.h>
  15
  16 #include "common.h"
  17 #include "regs-clock.h"
  18
  19 static int __init s5pv210_fdt_map_sys(unsigned long node, const char *uname,
  20                                         int depth, void *data)
  21 {
  22         struct map_desc iodesc;
  23         const __be32 *reg;
  24         int len;
  25
  26         if (!of_flat_dt_is_compatible(node, "samsung,s5pv210-clock"))
  27                 return 0;
  28
  29         reg = of_get_flat_dt_prop(node, "reg", &len);
  30         if (reg == NULL || len != (sizeof(unsigned long) * 2))
  31                 return 0;
  32
  33         iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
  34         iodesc.length = be32_to_cpu(reg[1]) - 1;
  35         iodesc.virtual = (unsigned long)S3C_VA_SYS;
  36         iodesc.type = MT_DEVICE;
  37         iotable_init(&iodesc, 1);
  38
  39         return 1;
  40 }
  41
  42 static void __init s5pv210_dt_map_io(void)
  43 {
  44         debug_ll_io_init();
  45
  46         of_scan_flat_dt(s5pv210_fdt_map_sys, NULL);
  47 }
  48
  49 static void s5pv210_dt_restart(enum reboot_mode mode, const char *cmd)
  50 {
  51         __raw_writel(0x1, S5P_SWRESET);
  52 }
  53
  54 static void __init s5pv210_dt_init_late(void)
  55 {
  56         platform_device_register_simple("s5pv210-cpufreq", -1, NULL, 0);
  57         s5pv210_pm_init();
  58 }
  59
  60 static char const *const s5pv210_dt_compat[] __initconst = {
  61         "samsung,s5pc110",
  62         "samsung,s5pv210",
  63         NULL
  64 };
  65
  66 DT_MACHINE_START(S5PV210_DT, "Samsung S5PC110/S5PV210-based board")
  67         .dt_compat = s5pv210_dt_compat,
  68         .map_io = s5pv210_dt_map_io,
  69         .restart = s5pv210_dt_restart,
  70         .init_late = s5pv210_dt_init_late,
  71 MACHINE_END