Timeout value for opening watchdog device

configname: CONFIG_WATCHDOG_OPEN_TIMEOUT

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>Timeout value for opening watchdog device
In linux kernel since version 5.1 (release Date: 2019-05-05)  
The maximum time, in seconds, for which the watchdog framework takes
care of pinging a hardware watchdog. A value of 0 means infinite. The
value set here can be overridden by the commandline parameter
"watchdog.open_timeout".

depends
CONFIG_WATCHDOG