On System76 laptops with Clevo proprietary firmware, these drivers control some of the hotkeys and allow for custom fan control.
This project targets 5.15, the last LTS of the 5.x series.
To install this as a kernel module:
# Compile the module
make
# Remove any old instances
sudo modprobe -r system76
# Insert the new module
sudo insmod src/system76.ko dyndbg=+p
# View log messages
dmesg | grep system76