Commit a13f0795 authored by Kelvin Cheung's avatar Kelvin Cheung Committed by Ralf Baechle

MIPS: Loongson1B: Fix reboot problem on LS1B

- Correct the header file of watchdog registers
 - Use ioremap_nocache() to access watchdog registers instead
Signed-off-by: default avatarKelvin Cheung <keguang.zhang@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8022/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0dc294c0
/*
* Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
*
* Loongson 1 watchdog register definitions.
* Loongson 1 Watchdog Register Definitions.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
......@@ -12,11 +12,8 @@
#ifndef __ASM_MACH_LOONGSON1_REGS_WDT_H
#define __ASM_MACH_LOONGSON1_REGS_WDT_H
#define LS1X_WDT_REG(x) \
((void __iomem *)KSEG1ADDR(LS1X_WDT_BASE + (x)))
#define LS1X_WDT_EN LS1X_WDT_REG(0x0)
#define LS1X_WDT_SET LS1X_WDT_REG(0x4)
#define LS1X_WDT_TIMER LS1X_WDT_REG(0x8)
#define WDT_EN 0x0
#define WDT_TIMER 0x4
#define WDT_SET 0x8
#endif /* __ASM_MACH_LOONGSON1_REGS_WDT_H */
......@@ -14,12 +14,7 @@
#include <loongson1.h>
static void ls1x_restart(char *command)
{
__raw_writel(0x1, LS1X_WDT_EN);
__raw_writel(0x5000000, LS1X_WDT_TIMER);
__raw_writel(0x1, LS1X_WDT_SET);
}
static void __iomem *wdt_base;
static void ls1x_halt(void)
{
......@@ -29,6 +24,15 @@ static void ls1x_halt(void)
}
}
static void ls1x_restart(char *command)
{
__raw_writel(0x1, wdt_base + WDT_EN);
__raw_writel(0x1, wdt_base + WDT_TIMER);
__raw_writel(0x1, wdt_base + WDT_SET);
ls1x_halt();
}
static void ls1x_power_off(void)
{
ls1x_halt();
......@@ -36,6 +40,10 @@ static void ls1x_power_off(void)
static int __init ls1x_reboot_setup(void)
{
wdt_base = ioremap_nocache(LS1X_WDT_BASE, 0x0f);
if (!wdt_base)
panic("Failed to remap watchdog registers");
_machine_restart = ls1x_restart;
_machine_halt = ls1x_halt;
pm_power_off = ls1x_power_off;
......
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