linux-kernel - Re: [PATCH 2/3] ASoC: tas571x: New driver for TI TAS571x power amplifiers

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Message-ID: <20150420201401.GP6023@sirena.org.uk>
Date:	Mon, 20 Apr 2015 21:14:01 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Kevin Cernekee <cernekee@...omium.org>
Cc:	Liam Girdwood <lgirdwood@...il.com>, dgreid@...omium.org,
	Andrew Bresticker <abrestic@...omium.org>,
	Olof Johansson <olofj@...omium.org>,
	alsa-devel@...a-project.org, devicetree@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] ASoC: tas571x: New driver for TI TAS571x power
 amplifiers

On Mon, Apr 20, 2015 at 08:12:36AM -0700, Kevin Cernekee wrote:
> On Mon, Apr 20, 2015 at 5:21 AM, Mark Brown <broonie@...nel.org> wrote:

> >> The same check shows up in numerous other drivers, including the one
> >> for the audio controller on my board.

> > Sounds like either that (undisclosed) driver has a problem or you're
> > using it inappropriately.

> I don't think this driver has been posted on the list yet, but the
> checks show up in these two functions:

> https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-3.14/sound/soc/img/concerto-audio.c#108
> https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-3.14/sound/soc/img/concerto-audio.c#147

> Any suggestions on what to change?

That driver has not been posted previously (and looks like it could use
some rework for mainline).  If it doesn't care if it set the clock and
is just trying for information it should be handling -ENOTSUPP, that's
why the core returns that value.

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