systemd-boot controller support

[Pandapip1]

Component

systemd-boot

Is your feature request related to a problem? Please describe

I would like to be able to use the controllers on my Steam deck to switch between boot options.

Describe the solution you'd like

Controller support in systemd-boot.

Describe alternatives you've considered

See #32827

The systemd version you checked that didn't have the feature you are asking for

No response

[Pandapip1]

Turns out the D-pad emulates the arrow keys. So this isn't needed. Would still be nice to be able to use the normal controller though!

[poettering]

We aren't really in the business of writing drivers.

We do support loading drivers from a drop-in dir in the ESP though. Hence if this requires a new driver, feel free to write it, and put it in that drop-in dir and things should just work.

or are you just asking for us to react to certain keys that are already handled by the uefi input drivers? if so, figure out which those are and we can add it.

either way, this is not really actionable for us, we do not have such hw, and gaming is not our world, hence please send patches in case this is about handling keypresses.