[alsa-devel] GPIO control from ALSA

[Petr Kulhavy]

On 20.04.2016 11:06, Lars-Peter Clausen wrote:
> On 04/20/2016 10:51 AM, Petr Kulhavy wrote:
>>
>> Thanks, Lars, for the good pointers! I will check that out.
>>
>> Is there also a way to map GPIO to a control which then appears e.g. in
>> alsamixer? That would be useful for the mic/line selection.
> Rather than exposing the GPIO itself you'd expose the logical function of
> the GPIO. E.g. in your case a ENUM control that allows to switch between
> microphone and capture and in the background this sets the GPIO according to
> the selection.

I understand that, my question was more how to hook the enum to a 
function rather to a codec register?

Thanks
Petr