linux-kernel - Re: [PATCH V2 3/3] ASoC: fsl_asrc: spba clock is needed by asrc device

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Message-ID: <20151120220015.GA10156@Asurada>
Date:	Fri, 20 Nov 2015 14:00:16 -0800
From:	Nicolin Chen <nicoleotsuka@...il.com>
To:	Rob Herring <robh@...nel.org>
Cc:	Shengjiu Wang <shengjiu.wang@...escale.com>, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, timur@...i.org, Xiubo.Lee@...il.com,
	lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
	tiwai@...e.com, shawnguo@...nel.org, alsa-devel@...a-project.org,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH V2 3/3] ASoC: fsl_asrc: spba clock is needed by asrc
 device

On Fri, Nov 20, 2015 at 08:29:46AM -0600, Rob Herring wrote:
> On Fri, Nov 20, 2015 at 02:17:53PM +0800, Shengjiu Wang wrote:
> > ASRC need to enable the spba clock, when sdma is using share peripheral
> > script. In this case, there is two spba master port is used, if don't
> > enable the clock, the spba bus will have arbitration issue, which may
> > cause read/write wrong data from/to ASRC registers
> > 
> > Signed-off-by: Shengjiu Wang <shengjiu.wang@...escale.com>
> > ---
> >  Documentation/devicetree/bindings/sound/fsl,asrc.txt |  2 ++
> >  sound/soc/fsl/fsl_asrc.c                             | 10 ++++++++++
> >  sound/soc/fsl/fsl_asrc.h                             |  1 +
> >  3 files changed, 13 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/sound/fsl,asrc.txt b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> > index b93362a..d8eeee3 100644
> > --- a/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> > +++ b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> > @@ -25,6 +25,8 @@ Required properties:
> >  	"mem"		  Peripheral access clock to access registers.
> >  	"ipg"		  Peripheral clock to driver module.
> >  	"asrck_<0-f>"	  Clock sources for input and output clock.
> > +	"spba"		  The spba clock is needed when two spba master port
> > +			  is used.
> 
> I'm assuming the same comments on patch 1 apply to all 3.

Yes. I should have mentioned that.

Nicolin
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