LXR linux/arch/mips/sgi-ip30/ip30-power.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * ip30-power.c: Software powerdown and reset handling for IP30 architecture.
   4 *
   5 * Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
   6 *               2014 Joshua Kinard <kumba@gentoo.org>
   7 *               2009 Johannes Dickgreber <tanzy@gmx.de>
   8 */
   9
  10#include <linux/init.h>
  11#include <linux/kernel.h>
  12#include <linux/module.h>
  13#include <linux/sched.h>
  14#include <linux/notifier.h>
  15#include <linux/delay.h>
  16#include <linux/rtc/ds1685.h>
  17#include <linux/interrupt.h>
  18#include <linux/pm.h>
  19
  20#include <asm/reboot.h>
  21#include <asm/sgi/heart.h>
  22
  23static void __noreturn ip30_machine_restart(char *cmd)
  24{
  25        /*
  26         * Execute HEART cold reset
  27         *   Yes, it's cold-HEARTed!
  28         */
  29        heart_write((heart_read(&heart_regs->mode) | HM_COLD_RST),
  30                    &heart_regs->mode);
  31        unreachable();
  32}
  33
  34static int __init ip30_reboot_setup(void)
  35{
  36        _machine_restart = ip30_machine_restart;
  37
  38        return 0;
  39}
  40
  41subsys_initcall(ip30_reboot_setup);
  42