I wrote a program to control Watchdog in Linux, and I believe it will come in handy for anyone who mine in Linux.
In version 1.1 I added support for new types of watchdogs, v3.2 (black) and v5.0 (red):
Installation instruction:
https://www.youtube.com/watch?v=VN_Kk9RTEpA&t=3s
Download link:
https://github.com/delevic/USB-Wathchdog-Control-Linux