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authorTimo Juhani Lindfors <timo.lindfors@iki.fi>2010-09-30 17:08:04 +0300
committerWim Van Sebroeck <wim@iguana.be>2010-10-28 21:42:32 +0000
commita422088db21333ba02a0f4fe4f5abfb08c802d35 (patch)
tree8ace538437914668ab3060c275cb3d7a0c5de61a /drivers/watchdog
parentf0fc10745a48c766ea5d6d83a6a371a223986bb0 (diff)
downloadlinux-a422088db21333ba02a0f4fe4f5abfb08c802d35.tar.bz2
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>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/it8712f_wdt.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
index b08fae65bb0e..b32c6c045b1a 100644
--- a/drivers/watchdog/it8712f_wdt.c
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -85,6 +85,14 @@ static unsigned short address;
#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 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();