[alsa-devel] [PATCH v3 1/2] ASoC: codecs: add TA5720 digital amplifier DT bindings

[Andreas Dannenberg]

On Tue, Apr 26, 2016 at 04:37:07PM +0100, Mark Brown wrote:
> On Mon, Apr 25, 2016 at 03:17:35PM -0500, Andreas Dannenberg wrote:
> 
> > +Optional properties:
> > +
> > +- dvdd-supply : phandle to a 3.3-V supply for the digital circuitry
> > +- pvdd-supply : phandle to a supply used for the Class-D amp and the analog
> 
> This suggests that the device doesn't need power...  

Hi Mark,
no power, now that would be nice! :)  What this was supposed to mean is
that the properties are optional, the power of course is not. The DT has
really no control over how I wire up my HW and I'd argue most folks just
permanently power the TAS5720 since the shutdown current is just a few
uAs IIRC in order to save some BOM cost. But I suppose the DT description
is such that the Kernel can more intelligently handle things based on
what the driver is doing if somebody choses and implements additional
regulator/power switch HW. Or did I misunderstand your point?

Thanks,
Andreas