[alsa-devel] [PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[Mark Brown]

On Mon, May 07, 2018 at 02:57:28PM +0800, John Hsu wrote:

> Yes, you are right. In the driver, we suppose that the input of codec
> is microphone always. Therefore, we make the micbias on to provide the
> power of microphone automatically if any input path is enabled.
> What advice do you have to deal with micbias? Thank you.

Like I say you should just provide the MICBIAS pin and leave it up to
the machine drivers to connect it to whatever microphones it is being
used with.  This means deleting the route from the driver and (in order
to avoid breaking them) adding the relevant route to any machine drivers
that are in mainline already.
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