linux-kernel - Re: [PATCH v2] ASoC: cs42888: Add codec driver support

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Message-ID: <20140312020334.GD1177@MrMyself>
Date:	Wed, 12 Mar 2014 10:03:35 +0800
From:	Nicolin Chen <Guangyu.Chen@...escale.com>
To:	"Austin, Brian" <Brian.Austin@...rus.com>
CC:	Mark Brown <broonie@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	"Handrigan, Paul" <Paul.Handrigan@...rus.com>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	"rob@...dley.net" <rob@...dley.net>,
	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
Subject: Re: [PATCH v2] ASoC: cs42888: Add codec driver support

Hi Brian,

On Wed, Mar 12, 2014 at 02:05:00AM +0000, Austin, Brian wrote:
> 
> 
> >> On Mar 11, 2014, at 13:46, "Mark Brown" <broonie@...nel.org> wrote:
> >> 
> >> On Tue, Mar 11, 2014 at 04:55:58PM +0100, Lars-Peter Clausen wrote:
> >> On 03/11/2014 04:41 PM, Brian Austin wrote:
> > 
> >>> So WRT the CS42888, this is one device in a series of 2 devices that are
> >>> register compatible with the only difference being that the CS42488 has 2
> >>> extra ADC's. Same die and same DeviceID.
> > 
> >>> Would it make more sense to submit the driver with the extra ADC's to make
> >>> it feature complete for both devices? Wouldn't be odd to have 2 drivers that
> >>> do the same for 98% of the code.
> > 
> >> This should be in one driver. But support for the second device can
> >> always be added in a follow up patch.
> > 
> > Yes, we can add support later.  It might be helpful to name the driver
> > with some generic name I guess.
> CS42xx8 would work.
> 
> We have a CS42448 and the CS42888. The difference is the 2 extra ADC's on the CS42448. I can add those later.
> 
> I still would like to go over some of the v2 code though before a v3 is sent.

Actually I've already sent v3 right after this v2 due to some doc updating.

Anyway, I'd love to wait for your comments against the patch before I send v3.

Thank you,
Nicolin


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