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

[Mark Brown]

On Tue, Mar 25, 2014 at 09:33:42AM -0600, Stephen Warren wrote:
> On 03/25/2014 07:30 AM, Mark Brown wrote:

> > 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.

OK, it looked to be something like that - in that case the two
definitely should be sharing code.  Something like the current Wolfson
drivers or wm8994 for example, though probably even more sharing is
possible if it's just the addition of the DSP.
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