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

Blackfin Rotary support

modulename: bfin_rotary.ko

configname: CONFIG_INPUT_BFIN_ROTARY

Linux Kernel Configuration
└─>Device Drivers
└─>Input device support
└─>Miscellaneous devices
└─>Blackfin Rotary support
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Say Y here if you want to use the Blackfin Rotary.

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

source code: