WDT_HEARTBEAT      69 drivers/watchdog/at91sam9_wdt.c #define WDT_HEARTBEAT 15
WDT_HEARTBEAT      38 drivers/watchdog/pika_wdt.c #define WDT_HEARTBEAT 15
WDT_HEARTBEAT      65 drivers/watchdog/tegra_wdt.c #define WDT_HEARTBEAT 120
WDT_HEARTBEAT      51 drivers/watchdog/via_wdt.c #define WDT_HEARTBEAT	(HZ/2)	/* should be <= ((WDT_HW_HEARTBEAT*HZ)/2) */