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| author | Kelvin Cheung <keguang.zhang@gmail.com> | 2014-10-10 11:39:59 +0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-11-24 07:45:09 +0100 |
| commit | a13f0795752389f84bc31b9171cb79ad6759e4db (patch) | |
| tree | 3bfb346e0e22c9b4b64d4504342d496282266ef1 /arch | |
| parent | 0dc294c05d9df09ca4a65071e370247eaab8638d (diff) | |
| download | linux-stable-a13f0795752389f84bc31b9171cb79ad6759e4db.tar.gz linux-stable-a13f0795752389f84bc31b9171cb79ad6759e4db.tar.bz2 linux-stable-a13f0795752389f84bc31b9171cb79ad6759e4db.zip | |
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: Kelvin Cheung <keguang.zhang@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8022/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/include/asm/mach-loongson1/regs-wdt.h | 11 | ||||
| -rw-r--r-- | arch/mips/loongson1/common/reset.c | 20 |
2 files changed, 18 insertions, 13 deletions
diff --git a/arch/mips/include/asm/mach-loongson1/regs-wdt.h b/arch/mips/include/asm/mach-loongson1/regs-wdt.h index 6574568c2084..c39ee982ad3b 100644 --- a/arch/mips/include/asm/mach-loongson1/regs-wdt.h +++ b/arch/mips/include/asm/mach-loongson1/regs-wdt.h @@ -1,7 +1,7 @@ /* * 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 */ diff --git a/arch/mips/loongson1/common/reset.c b/arch/mips/loongson1/common/reset.c index 547f34b69e4c..c41e4ca56ab4 100644 --- a/arch/mips/loongson1/common/reset.c +++ b/arch/mips/loongson1/common/reset.c @@ -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; |