The RetroArch Flatpak package supports the following controller drivers via the Settings -> Drivers -> Controller menu: linuxraw parport sdl2 udev The directory /app/share/libretro/autoconfig contains sub-directories for various controll...
Shell script to set up a Raspberry Pi/Odroid/PC with RetroArch emulator and various cores - RetroPie-Setup/scriptmodules/supplementary/configedit.sh at 04a74980e27b23102c015a930e25ad5dcb1f219e · RetroPie/RetroPie-Setup