1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com> 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #include <linux/io.h> 7*4882a593Smuzhiyun #include <linux/pm.h> 8*4882a593Smuzhiyun #include <linux/sizes.h> 9*4882a593Smuzhiyun #include <asm/idle.h> 10*4882a593Smuzhiyun #include <asm/reboot.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <loongson1.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun static void __iomem *wdt_reg_base; 15*4882a593Smuzhiyun ls1x_halt(void)16*4882a593Smuzhiyunstatic void ls1x_halt(void) 17*4882a593Smuzhiyun { 18*4882a593Smuzhiyun while (1) { 19*4882a593Smuzhiyun if (cpu_wait) 20*4882a593Smuzhiyun cpu_wait(); 21*4882a593Smuzhiyun } 22*4882a593Smuzhiyun } 23*4882a593Smuzhiyun ls1x_restart(char * command)24*4882a593Smuzhiyunstatic void ls1x_restart(char *command) 25*4882a593Smuzhiyun { 26*4882a593Smuzhiyun __raw_writel(0x1, wdt_reg_base + WDT_EN); 27*4882a593Smuzhiyun __raw_writel(0x1, wdt_reg_base + WDT_TIMER); 28*4882a593Smuzhiyun __raw_writel(0x1, wdt_reg_base + WDT_SET); 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun ls1x_halt(); 31*4882a593Smuzhiyun } 32*4882a593Smuzhiyun ls1x_power_off(void)33*4882a593Smuzhiyunstatic void ls1x_power_off(void) 34*4882a593Smuzhiyun { 35*4882a593Smuzhiyun ls1x_halt(); 36*4882a593Smuzhiyun } 37*4882a593Smuzhiyun ls1x_reboot_setup(void)38*4882a593Smuzhiyunstatic int __init ls1x_reboot_setup(void) 39*4882a593Smuzhiyun { 40*4882a593Smuzhiyun wdt_reg_base = ioremap(LS1X_WDT_BASE, (SZ_4 + SZ_8)); 41*4882a593Smuzhiyun if (!wdt_reg_base) 42*4882a593Smuzhiyun panic("Failed to remap watchdog registers"); 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun _machine_restart = ls1x_restart; 45*4882a593Smuzhiyun _machine_halt = ls1x_halt; 46*4882a593Smuzhiyun pm_power_off = ls1x_power_off; 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun return 0; 49*4882a593Smuzhiyun } 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun arch_initcall(ls1x_reboot_setup); 52