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[WATCHDOG] w83627hf_wdt.c-initialized_bios_bug

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Attached is a small update to the w83627hf watchdog driver
to initialise appropriately if it was already initialised
in the BIOS. On tyan motherboards for e.g. you can init
the watchdog to 4 mins, then when the driver is loaded it
sets the watchdog to "seconds" mode, and then machine will
reboot within 4 seconds. So this patch resets the timeout
to the configured value if the watchdog is already running.

Signed-off-by: P@draig Brady <P@draigBrady.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
P@Draig Brady 2005-08-17 09:06:07 +02:00 committed by Wim Van Sebroeck
parent 94f1e9f316
commit 93642ecd46
1 changed files with 6 additions and 0 deletions
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6
drivers/char/watchdog/w83627hf_wdt.c
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@ -93,6 +93,12 @@ w83627hf_init(void)
w83627hf_select_wd_register();
outb_p(0xF6, WDT_EFER); /* Select CRF6 */
t=inb_p(WDT_EFDR); /* read CRF6 */
if (t != 0) {
printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
outb_p(timeout, WDT_EFDR); /* Write back to CRF6 */
}
outb_p(0xF5, WDT_EFER); /* Select CRF5 */
t=inb_p(WDT_EFDR); /* read CRF5 */
t&=~0x0C; /* set second mode & disable keyboard turning off watchdog */