arch/mips/loongson1/common/reset.c

   1 /*
   2  * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
   3  *
   4  * This program is free software; you can redistribute  it and/or modify it
   5  * under  the terms of  the GNU General  Public License as published by the
   6  * Free Software Foundation;  either version 2 of the  License, or (at your
   7  * option) any later version.
   8  */
   9
  10 #include <linux/io.h>
  11 #include <linux/pm.h>
  12 #include <asm/idle.h>
  13 #include <asm/reboot.h>
  14
  15 #include <loongson1.h>
  16
  17 static void ls1x_restart(char *command)
  18 {
  19         __raw_writel(0x1, LS1X_WDT_EN);
  20         __raw_writel(0x5000000, LS1X_WDT_TIMER);
  21         __raw_writel(0x1, LS1X_WDT_SET);
  22 }
  23
  24 static void ls1x_halt(void)
  25 {
  26         while (1) {
  27                 if (cpu_wait)
  28                         cpu_wait();
  29         }
  30 }
  31
  32 static void ls1x_power_off(void)
  33 {
  34         ls1x_halt();
  35 }
  36
  37 static int __init ls1x_reboot_setup(void)
  38 {
  39         _machine_restart = ls1x_restart;
  40         _machine_halt = ls1x_halt;
  41         pm_power_off = ls1x_power_off;
  42
  43         return 0;
  44 }
  45
  46 arch_initcall(ls1x_reboot_setup);