diff options
Diffstat (limited to 'drivers/watchdog/it8712f_wdt.c')
| -rw-r--r-- | drivers/watchdog/it8712f_wdt.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c index f52c162b1bea..b32c6c045b1a 100644 --- a/drivers/watchdog/it8712f_wdt.c +++ b/drivers/watchdog/it8712f_wdt.c @@ -75,15 +75,23 @@ static unsigned short address; #define WDT_CONFIG 0x72 /* WDT Register: Configuration */ #define WDT_TIMEOUT 0x73 /* WDT Register: Timeout Value */ -#define WDT_RESET_GAME 0x10 -#define WDT_RESET_KBD 0x20 -#define WDT_RESET_MOUSE 0x40 -#define WDT_RESET_CIR 0x80 +#define WDT_RESET_GAME 0x10 /* Reset timer on read or write to game port */ +#define WDT_RESET_KBD 0x20 /* Reset timer on keyboard interrupt */ +#define WDT_RESET_MOUSE 0x40 /* Reset timer on mouse interrupt */ +#define WDT_RESET_CIR 0x80 /* Reset timer on consumer IR interrupt */ #define WDT_UNIT_SEC 0x80 /* If 0 in MINUTES */ -#define WDT_OUT_PWROK 0x10 -#define WDT_OUT_KRST 0x40 +#define WDT_OUT_PWROK 0x10 /* Pulse PWROK on timeout */ +#define WDT_OUT_KRST 0x40 /* Pulse reset on timeout */ + +static int wdt_control_reg = WDT_RESET_GAME; +module_param(wdt_control_reg, int, 0); +MODULE_PARM_DESC(wdt_control_reg, "Value to write to watchdog control " + "register. The default WDT_RESET_GAME resets the timer on " + "game port reads that this driver generates. You can also " + "use KBD, MOUSE or CIR if you have some external way to " + "generate those interrupts."); static int superio_inb(int reg) { @@ -131,7 +139,8 @@ static inline void superio_exit(void) static inline void it8712f_wdt_ping(void) { - inb(address); + if (wdt_control_reg & WDT_RESET_GAME) + inb(address); } static void it8712f_wdt_update_margin(void) @@ -170,7 +179,7 @@ static void it8712f_wdt_enable(void) superio_enter(); superio_select(LDN_GPIO); - superio_outb(WDT_RESET_GAME, WDT_CONTROL); + superio_outb(wdt_control_reg, WDT_CONTROL); it8712f_wdt_update_margin(); |