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yaml
---
r: 149261
b: refs/heads/master
c: 3cba5ef
h: refs/heads/master
i:
  149259: 89f442e
v: v3
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Ben Dooks committed May 17, 2009
1 parent d06d951 commit 37cbdd9
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Showing 3 changed files with 51 additions and 35 deletions.
2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: 3f7ea467be1bad860c0f71ba7373dd3cf76b485a
refs/heads/master: 3cba5ef862bc2c2a0cf2841d993bfb99b9a6c476
36 changes: 2 additions & 34 deletions trunk/arch/arm/mach-s3c2410/include/mach/system-reset.h
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*/

#include <mach/hardware.h>
#include <linux/io.h>

#include <plat/regs-watchdog.h>
#include <mach/regs-clock.h>

#include <linux/clk.h>
#include <linux/err.h>
#include <plat/watchdog-reset.h>

extern void (*s3c24xx_reset_hook)(void);

static void
arch_reset(char mode, const char *cmd)
{
struct clk *wdtclk;

if (mode == 's') {
cpu_reset(0);
}

if (s3c24xx_reset_hook)
s3c24xx_reset_hook();

printk("arch_reset: attempting watchdog reset\n");

__raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */

wdtclk = clk_get(NULL, "watchdog");
if (!IS_ERR(wdtclk)) {
clk_enable(wdtclk);
} else
printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);

/* put initial values into count and data */
__raw_writel(0x80, S3C2410_WTCNT);
__raw_writel(0x80, S3C2410_WTDAT);

/* set the watchdog to go and reset... */
__raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON);

/* wait for reset to assert... */
mdelay(500);

printk(KERN_ERR "Watchdog reset failed to assert reset\n");

/* delay to allow the serial port to show the message */
mdelay(50);
arch_wdt_reset();

/* we'll take a jump through zero as a poor second */
cpu_reset(0);
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48 changes: 48 additions & 0 deletions trunk/arch/arm/plat-s3c/include/plat/watchdog-reset.h
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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.
*/

#include <plat/regs-watchdog.h>

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>

static inline void arch_wdt_reset(void)
{
struct clk *wdtclk;

printk("arch_reset: attempting watchdog reset\n");

__raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */

wdtclk = clk_get(NULL, "watchdog");
if (!IS_ERR(wdtclk)) {
clk_enable(wdtclk);
} else
printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);

/* put initial values into count and data */
__raw_writel(0x80, S3C2410_WTCNT);
__raw_writel(0x80, S3C2410_WTDAT);

/* set the watchdog to go and reset... */
__raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON);

/* wait for reset to assert... */
mdelay(500);

printk(KERN_ERR "Watchdog reset failed to assert reset\n");

/* delay to allow the serial port to show the message */
mdelay(50);
}

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