watchdog: Fix reboot on W83627ehf chipset.

The watchdog driver for the SUPERIO chip winbond w83627ehf does not work.
If you open /dev/watchdog and write a character to /dev/watchdog then
the watchdog will be triggered. However the watchdog will not trigger
the hardware RESET after the timeout, because the watchdog has never been
enabled.

Signed-off-by: Herman Morsink Vollenbroek <h.morsinkvollenbroek@home.nl>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 48f2e0148bb4..e5c91d4404ed 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -129,6 +129,8 @@ static void w83627hf_init(void)
         t = inb_p(WDT_EFDR);      /* read CRF5 */
         t &= ~0x0C;               /* set second mode & disable keyboard
                                     turning off watchdog */
+        t |= 0x02;                /* enable the WDTO# output low pulse
+                                    to the KBRST# pin (PIN60) */
         outb_p(t, WDT_EFDR);    /* Write back to CRF5 */
 
         outb_p(0xF7, WDT_EFER); /* Select CRF7 */