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Ben Dooks
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May 17, 2009
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refs/heads/master: 3f7ea467be1bad860c0f71ba7373dd3cf76b485a | ||
refs/heads/master: 3cba5ef862bc2c2a0cf2841d993bfb99b9a6c476 |
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/* arch/arm/plat-s3c/include/plat/watchdog-reset.h | ||
* | ||
* Copyright (c) 2008 Simtec Electronics | ||
* Ben Dooks <ben@simtec.co.uk> | ||
* | ||
* S3C2410 - System define for arch_reset() function | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License version 2 as | ||
* published by the Free Software Foundation. | ||
*/ | ||
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#include <plat/regs-watchdog.h> | ||
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#include <linux/clk.h> | ||
#include <linux/err.h> | ||
#include <linux/io.h> | ||
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static inline void arch_wdt_reset(void) | ||
{ | ||
struct clk *wdtclk; | ||
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printk("arch_reset: attempting watchdog reset\n"); | ||
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__raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */ | ||
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wdtclk = clk_get(NULL, "watchdog"); | ||
if (!IS_ERR(wdtclk)) { | ||
clk_enable(wdtclk); | ||
} else | ||
printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__); | ||
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/* put initial values into count and data */ | ||
__raw_writel(0x80, S3C2410_WTCNT); | ||
__raw_writel(0x80, S3C2410_WTDAT); | ||
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/* set the watchdog to go and reset... */ | ||
__raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN | | ||
S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON); | ||
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/* wait for reset to assert... */ | ||
mdelay(500); | ||
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printk(KERN_ERR "Watchdog reset failed to assert reset\n"); | ||
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/* delay to allow the serial port to show the message */ | ||
mdelay(50); | ||
} |