LXR linux/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
  19static 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
  42static 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
  49static void s5pv210_dt_restart(enum reboot_mode mode, const char *cmd)
  50{
  51        __raw_writel(0x1, S5P_SWRESET);
  52}
  53
  54static void __init s5pv210_dt_init_late(void)
  55{
  56        platform_device_register_simple("s5pv210-cpufreq", -1, NULL, 0);
  57        s5pv210_pm_init();
  58}
  59
  60static char const *const s5pv210_dt_compat[] __initconst = {
  61        "samsung,s5pc110",
  62        "samsung,s5pv210",
  63        NULL
  64};
  65
  66DT_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,
  71MACHINE_END
  72