default or selected kernelversion does not have config value CONFIG_GEMINI_WATCHDOG.
Result is shown for kernelversion 6.7-rc3

Gemini watchdog

modulename: gemini_wdt.ko


Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>Gemini watchdog
In linux kernel since version 4.5.1 (release Date: 2016-04-12)  
Say Y here if to include support for the watchdog timer
embedded in the Cortina Systems Gemini family of devices.

To compile this driver as a module, choose M here: the
module will be called gemini_wdt.

source code: