[alsa-devel] [PATCH v4] ASoC: tlv320aic31xx: Add basic codec driver implementation

[Mark Brown]

On Mon, Mar 10, 2014 at 12:09:38PM +0000, Mark Rutland wrote:
> On Mon, Mar 10, 2014 at 08:52:21AM +0000, Jyri Sarha wrote:

> > +        1 or MICBIAS_2_0V - MICBIAS output is powered to 2.0V
> > +        2 or MICBIAS_2_5V - MICBIAS output is powered to 2.5V
> > +        3 or MICBIAS_AVDD - MICBIAS output is connected to AVDD
> > +       If this node is not mentioned or if the value is unknown, then
> > +       micbias is set to 2.0V.

> Why does the dts write need to select these -- what prevents this
> getting selected dynamically?

It's a property of the system integration - the board will be designed
to bias the microphone at some voltage.
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