default or selected kernelversion does not have config value CONFIG_RTC_DRV_GEMINI.
Result is shown for kernelversion 6.4.14

Gemini SoC RTC

modulename: rtc-gemini.ko

configname: CONFIG_RTC_DRV_GEMINI

Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>Gemini SoC RTC
In linux kernel since version 4.1 (release Date: 2015-06-21)  
If you say Y here you will get support for the
RTC found on Gemini SoC's.

This driver can also be built as a module. If so, the module
will be called rtc-gemini.

source code:
depends
CONFIG_HAS_IOMEM
CONFIG_RTC_CLASS
CONFIG_ARCH_GEMINI or CONFIG_COMPILE_TEST