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 <plat/map-base.h>
  17
  18#include "common.h"
  19#include "regs-clock.h"
  20
  21static int __init s5pv210_fdt_map_sys(unsigned long node, const char *uname,
  22                                        int depth, void *data)
  23{
  24        struct map_desc iodesc;
  25        const __be32 *reg;
  26        int len;
  27
  28        if (!of_flat_dt_is_compatible(node, "samsung,s5pv210-clock"))
  29                return 0;
  30
  31        reg = of_get_flat_dt_prop(node, "reg", &len);
  32        if (reg == NULL || len != (sizeof(unsigned long) * 2))
  33                return 0;
  34
  35        iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
  36        iodesc.length = be32_to_cpu(reg[1]) - 1;
  37        iodesc.virtual = (unsigned long)S3C_VA_SYS;
  38        iodesc.type = MT_DEVICE;
  39        iotable_init(&iodesc, 1);
  40
  41        return 1;
  42}
  43
  44static void __init s5pv210_dt_map_io(void)
  45{
  46        debug_ll_io_init();
  47
  48        of_scan_flat_dt(s5pv210_fdt_map_sys, NULL);
  49}
  50
  51static void s5pv210_dt_restart(enum reboot_mode mode, const char *cmd)
  52{
  53        __raw_writel(0x1, S5P_SWRESET);
  54}
  55
  56static void __init s5pv210_dt_init_late(void)
  57{
  58        platform_device_register_simple("s5pv210-cpufreq", -1, NULL, 0);
  59        s5pv210_pm_init();
  60}
  61
  62static char const *const s5pv210_dt_compat[] __initconst = {
  63        "samsung,s5pc110",
  64        "samsung,s5pv210",
  65        NULL
  66};
  67
  68DT_MACHINE_START(S5PV210_DT, "Samsung S5PC110/S5PV210-based board")
  69        .dt_compat = s5pv210_dt_compat,
  70        .map_io = s5pv210_dt_map_io,
  71        .restart = s5pv210_dt_restart,
  72        .init_late = s5pv210_dt_init_late,
  73MACHINE_END
  74