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[ARM] S3C: Move watchdog system reset to own file.

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Move the watchdog reset code from <mach/system-reset.h> to
a new file <plat/watchdog-reset.h> as this code is needed
by both s3c2410, s3c64xx and soon-to-be added s3c24a0.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2009-05-17 23:30:45 +01:00
parent 3f7ea467be
commit 3cba5ef862
2 changed files with 50 additions and 34 deletions
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36
arch/arm/mach-s3c2410/include/mach/system-reset.h
View File

@ -11,21 +11,13 @@
*/
#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);
}
@ -33,31 +25,7 @@ arch_reset(char mode, const char *cmd)
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);

48
arch/arm/plat-s3c/include/plat/watchdog-reset.h Normal file
View File

@ -0,0 +1,48 @@
/* 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);
}