| 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 | |
| 23 | static 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 | |
| 34 | static int __init ip30_reboot_setup(void) |
| 35 | { |
| 36 | _machine_restart = ip30_machine_restart; |
| 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | subsys_initcall(ip30_reboot_setup); |
| 42 |