CONFIG_I8254 (not configurable)

modulename: i8254.ko

configname: CONFIG_I8254

Linux Kernel Configuration
└─>Device Drivers
└─>I8254
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Enables support for the i8254 interface library functions. The i8254
interface library provides functions to facilitate communication with
interfaces compatible with the venerable Intel 8254 Programmable
Interval Timer (PIT). The Intel 825x family of chips was first
released in the early 1980s but compatible interfaces are nowadays
typically found embedded in larger VLSI processing chips and FPGA
components.

If built as a module its name will be i8254.

source code: