headset-button

[Alastair Johnson]

Andy Green wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Somebody in the thread at some point said:
> | moinmoin,
> |
> | is there a possibility to get a status of the wired-headset-button?
> | maybe some dbus-signals from fso?
> 
> Just a tip about that button, it is a bit of a hack that shorts out the
> mic.  To see a press, it needs the Mic to be powered which is not always
> the case.

Power switching would be MICB in the Wolfson power management register I 
guess. Is that exposed directly anywhere? I can't see anything that 
looks a likely match in the alsa state file, but I haven't searched the 
driver code yet.