ARM Secure Monitor Call based watchdog support

modulename: arm_smc_wdt.ko

configname: CONFIG_ARM_SMC_WATCHDOG

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>Device Tree and Open Firmware support
└─>ARM Secure Monitor Call based watchdog support
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Say Y here to include support for a watchdog timer
implemented by the EL3 Secure Monitor on ARM platforms.
Requires firmware support.
To compile this driver as a module, choose M here: the
module will be called arm_smc_wdt.

source code: