HID Remapper is a useful open-source programmable adapter for USB input devices, with a recent release adding support for Valve's new Steam Controller.
Yeah, all USB gamepads and controllers that I'm aware of follow the USB HID (human interface device) standard, and so should work with Linux. The only exception is the Microsoft XBox controller, which ...
Linux 6.9-rc7 is now available. It could be the final release candidate before the final release. It adds support for the ASUS ROG Raikiri controller and improves support for the upcoming Lunar Lake.