Atheros AR71XX/AR724X/AR913X hardware watchdog

modulename: ath79_wdt.ko

configname: CONFIG_ATH79_WDT

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>Atheros AR71XX/AR724X/AR913X hardware watchdog
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
Hardware driver for the built-in watchdog timer on the Atheros
AR71XX/AR724X/AR913X SoCs.

source code:
drivers/watchdog/ath79_wdt.c