watchdog: it8712f_wdt: Add module parameter for alternative reset sources
On iEi PCISA-9652-R10 (BIOS version 1.5) single board computer reads
from the game port do not seem to reset the watchdog timer. This patch
adds a module parameter wdt_config_reg to specify alternative reset
sources. At least WDT_RESET_KBD has been tested, even just running
while true; do
setleds -L +scroll
sleep 1
setleds -L -scroll
sleep 1
done
is enough to keep the watchdog happy.
Signed-off-by: Timo Juhani Lindfors <timo.lindfors@iki.fi>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
index b08fae6..b32c6c0 100644
--- a/drivers/watchdog/it8712f_wdt.c
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -85,6 +85,14 @@
#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)
{
outb(reg, REG);
@@ -131,7 +139,8 @@
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 @@
superio_enter();
superio_select(LDN_GPIO);
- superio_outb(WDT_RESET_GAME, WDT_CONTROL);
+ superio_outb(wdt_control_reg, WDT_CONTROL);
it8712f_wdt_update_margin();