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

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Date:	Tue, 11 Mar 2014 16:55:58 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Brian Austin <brian.austin@...rus.com>
CC:	Nicolin Chen <Guangyu.Chen@...escale.com>, broonie@...nel.org,
	Paul.Handrigan@...rus.com, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, rob@...dley.net, lgirdwood@...il.com,
	grant.likely@...aro.org, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org
Subject: Re: [PATCH v2] ASoC: cs42888: Add codec driver support

On 03/11/2014 04:41 PM, Brian Austin wrote:
>
> On Tue, 11 Mar 2014, Nicolin Chen wrote:
>
>> This patch adds support for the Cirrus Logic CS42888 Audio CODEC that
>> has four 24-bit A/D and eight 24-bit D/A converters.
>>
>> [ CS42888 supports both I2C and SPI control ports. As initial patch,
>>  this patch only adds the support for I2C. ]
>>
>> Signed-off-by: Nicolin Chen <Guangyu.Chen@...escale.com>
>> ---
> 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.

- Lars

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