20 Apr
2016
20 Apr
'16
10:33 a.m.
On 04/20/2016 10:03 AM, Petr Kulhavy wrote:
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?
There is no abstraction. Use controls and/or DAPM and the standard GPIO API, if you grep the sources you'll find a few examples of drivers using GPIOs to mute amplifiers and similar (e.g. qi_lb60).
- Lars