[alsa-devel] [PATCH] ASoC: add RT5639 CODEC driver

[Stephen Warren]

On 03/25/2014 07:30 AM, Mark Brown wrote:
> On Mon, Mar 24, 2014 at 10:16:37AM +0800, oder_chiou at realtek.com wrote:
>> From: Oder Chiou <oder_chiou at realtek.com>
>>
>> This patch adds the RT5639 codec driver.
> 
> Looking at the level of code similiarity between this and the rt5640
> driver I can't help but think that these should be supported from a
> single driver - a few quick spot checks of the register map suggests
> that there's at least some overlap.  There will need to be some device
> specific handling but it looks like there's more shared than not shared.
> What are the issues that prevent the code being shared, there may be
> something I've missed?

FWIW, I was informed internally (although this certainly isn't
normative) that RT5639 is RT5640 plus a DSP, and otherwise compatible.
Related, I have a board that has a RT5639 and I'm running the RT5640
driver on it for at least a simple use-case, without issue.