[L4T 32.3.1] Add second watchdog timer to Nano


We are trying to add custom watchdog functionality to our product.
By default, we have /dev/watchdog and /dev/watchdog0, but based on this documentation, it seems those both refer to the same timer: https://www.kernel.org/doc/Documentation/watchdog/watchdog-kernel-api.txt.

I believe there are 5 WDTs on the Nano, so how do I go about adding another one?

Not sure if you want to add another WDT HW to the system?
If so you need to driver for the chip and device tree configure to enable it.