Re: Proposal to support pressure sensitive "analog" buttons in evdev

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Hey,

On Mon, 2018-07-30 at 23:44 +0000, Roderick.Colenbrander@xxxxxxxx
wrote:
> Hi all,
> 
> I would like to share a proposal to extend evdev with support for
> pressure sensitive "analog" buttons. It is a feature common on gaming
> peripherals (arcade sticks, gamepads, wii guitar) as well now on
> analog
> keyboards such as Wooting One / Two keyboards on which every button
> is
> both analog and digital (so ~100 analog keys).
> 
<snip>
> 
> This is an initial proposal to address limitations in evdev to
> improve
> device support in existing drivers such as hid-sony, hid-betopff,
> psxpad-spi, hid-wii and probably others as well as new devices such
> as
> Wooting keyboards

Are there already user-space APIs, such as SDL, or the Steam joypad
user-space gunk, that support those types of input (even if that's not
implemented on Linux yet)?

What do those user-space APIs look like? Would they be a good fit for
this kernel API, and would the chatter/amount of data to process be too
much?

Cheers
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