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 <linux@kumba.dev>
 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);