Atmel SAMA5D4 Watchdog Timer

modulename: sama5d4_wdt.ko

configname: CONFIG_SAMA5D4_WATCHDOG

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>Atmel SAMA5D4 Watchdog Timer
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Atmel SAMA5D4 watchdog timer is embedded into SAMA5D4 chips.
Its Watchdog Timer Mode Register can be written more than once.
This will reboot your system when the timeout is reached.

source code:

depends
CONFIG_WATCHDOG
CONFIG_ARCH_AT91 or CONFIG_COMPILE_TEST