[alsa-devel] [PATCH V2 08/11] ARM: dts: imx6q-sabrelite: add sound device imx6q-sabrelite-sgtl5000

[Shawn Guo]

On Thu, May 10, 2012 at 10:45:08AM +0100, Mark Brown wrote:
> On Thu, May 10, 2012 at 05:41:15PM +0800, Shawn Guo wrote:
> 
> > The "Mic Bias" here is really a SGTL5000 internal supply.
> 
> If it is then what's providing the bias to the mic?  It's common for
> chips to have a micbias supply which comes out of the chip and is used
> by mics, this is my understanding of what this circuit is.

I did not make myself clear, but you made :)  Yes, this is exactly the
thing on my mind, and the circuit will look like:

     STGTL5000        BOARD
		|
      MIC_IN ---+--- JACK
	^	|     ^
	|	|     |
	|	|     |
    MIC_BAIS----+-----/
		|

Isn't you helped me create this understanding? [1]

Regards,
Shawn

[1] http://article.gmane.org/gmane.linux.alsa.devel/96351