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Date: Tue, 26 Apr 2016 11:14:25 -0500
From: Andreas Dannenberg <dannenberg@ti.com>
To: Mark Brown <broonie@kernel.org>
CC: <alsa-devel@alsa-project.org>, <devicetree@vger.kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>, Jaroslav Kysela <perex@perex.cz>,
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        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 1/2] ASoC: codecs: add TA5720 digital amplifier DT
 bindings
Message-ID: <20160426161425.GA2885@borg.dal.design.ti.com>
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 <20160426153707.GZ3217@sirena.org.uk>
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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