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watchdog-reset.h
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1 /* arch/arm/plat-s3c/include/plat/watchdog-reset.h
2  *
3  * Copyright (c) 2008 Simtec Electronics
4  * Ben Dooks <[email protected]>
5  *
6  * S3C2410 - System define for arch_reset() function
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11 */
12 
13 #include <plat/clock.h>
14 #include <plat/regs-watchdog.h>
15 #include <mach/map.h>
16 
17 #include <linux/clk.h>
18 #include <linux/err.h>
19 #include <linux/io.h>
20 #include <linux/delay.h>
21 
22 static inline void arch_wdt_reset(void)
23 {
24  printk("arch_reset: attempting watchdog reset\n");
25 
26  __raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */
27 
28  if (!IS_ERR(s3c2410_wdtclk))
30 
31  /* put initial values into count and data */
34 
35  /* set the watchdog to go and reset... */
38 
39  /* wait for reset to assert... */
40  mdelay(500);
41 
42  printk(KERN_ERR "Watchdog reset failed to assert reset\n");
43 
44  /* delay to allow the serial port to show the message */
45  mdelay(50);
46 }