This is a necessary addon for gamepad / joystick support for kodi media center. Without it, gamepads for controlling the application won't work.
For Ubuntu this addon is provided by the kodi devs via their ppa: http://kodi.wiki/view/Official_Ubuntu_PPA
Solus currently has no gamepad support for kodi. It used to work on the previous beta versions but the latest update (kodi beta 6) broke compatibility with the older plugin.
More info & source can be found here: https://github.com/kodi-game/peripheral.joystick