kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_KEYBOARD_TOSA.
Result is shown for kernelversion 5.4.194

Tosa keyboard

modulename: tosakbd.ko
configname: CONFIG_KEYBOARD_TOSA

Linux Kernel Configuration
└─> Device Drivers
└─> Input device support
└─> Keyboards
└─> Tosa keyboard

In linux kernel since version 2.6.25 (release Date: 2008-04-16)  

Say Y here to enable the keyboard on the Sharp Zaurus SL-6000x (Tosa)

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


source code:


drivers/input/keyboard/tosakbd.c