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