AT91SAM9X / AT91CAP9 watchdog

modulename: at91sam9_wdt.ko

configname: CONFIG_AT91SAM9X_WATCHDOG

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>AT91SAM9X / AT91CAP9 watchdog
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Watchdog timer embedded into AT91SAM9X and AT91CAP9 chips. This will
reboot your system when the timeout is reached.

source code:
drivers/watchdog/at91sam9_wdt.c

depends
CONFIG_WATCHDOG
CONFIG_ARCH_AT91 or CONFIG_COMPILE_TEST