From mboxrd@z Thu Jan  1 00:00:00 1970
From: Petr Kulhavy <petr@barix.com>
Subject: GPIO control from ALSA
Date: Wed, 20 Apr 2016 10:03:48 +0200
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Hello,

I'm writing a driver for ASoC "sound card" hardware which uses CPU GPIO 
to mute/unmute an analogue amplifier and another GPIO to control an 
analogue switch for line/mic switching. Is there an abstraction in ALSA 
to model this kind of hardware?

Thanks
Petr