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authorP@Draig Brady <P@draigBrady.com>2005-08-17 07:06:07 (GMT)
committerWim Van Sebroeck <wim@iguana.be>2005-09-03 11:58:03 (GMT)
commit93642ecd463df30d032da8ac37c2676cee4ad876 (patch)
tree11b4a099cf920a8d5ef639a4b8a6a3b23f6a15c9 /drivers/char/watchdog
parent94f1e9f316b10972b77a64344006c3bf8a4929b4 (diff)
downloadlinux-93642ecd463df30d032da8ac37c2676cee4ad876.tar.xz
[WATCHDOG] w83627hf_wdt.c-initialized_bios_bug
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>
Diffstat (limited to 'drivers/char/watchdog')
-rw-r--r--drivers/char/watchdog/w83627hf_wdt.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/char/watchdog/w83627hf_wdt.c b/drivers/char/watchdog/w83627hf_wdt.c
index 465e0fd..b5d8210 100644
--- a/drivers/char/watchdog/w83627hf_wdt.c
+++ b/drivers/char/watchdog/w83627hf_wdt.c
@@ -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 */