[Gta04-owner] Detecting headset plug: twl4030-madc IRQ issue

[PaulK]

After bringing audio output to Replicant on GTA04, I'm back to work on
headset plug detect. For now, I'm going with hw-validation kernel just
to make sure the ADCs are handled correctly. 

So apparently, ADC7 is MICSENSE (no headset / short / headset) [1],
exactly what I need. After trying some user-space madc code [2], it
seems that ADC7 reports pretty-much the same value (around raw=10)
regardless of headset plug state. 

What am I missing here? Any help would be greatly appreciated!

[1]: http://projects.goldelico.com/p/gta04-kernel/page/Devices-Overview/
[2]: https://github.com/scottellis/madc

-- 
Paul Kocialkowski, Replicant developer

Replicant is a fully free Android distribution

Website:        http://www.replicant.us
Wiki/Tracker:   http://redmine.replicant.us