[alsa-devel] [PATCH] ASoC: io: Remove hw_read() operation

[Mark Brown]

On Tue, Mar 04, 2014 at 10:45:47AM +0100, Lars-Peter Clausen wrote:

> Yea, but we are not in a hurry. My plan was to get all the small

YM "yes".  :)

> independent driver cleanups necessary for componetization merged for
> 3.15 and then for 3.16 do the componetnization in the ASoC core.

I'm keen to avoid getting lots of people sitting on unmerged patches,
it's a risk source due to interaction issues.  

> So what the patchset does is add a regmap pointer to the component
> struct. For now it also adds
> snd_soc_component_{read,write,update_bits,
> update_bits_async} wrapper functions which have the same signature
> as the matching regmap function. Internally it does check if the
> regmap field of the component is set, if yes, just forwards the call
> to the matching regmap function. If not it falls back to the read,
> write callbacks setup by CODEC or platform drivers. Once every
> driver has been converted to regmap we can remove the fallback and
> make the function static inline.

Yes, that's what I'd expect and roughly what I was suggesting doing
anyway inside the existing implementation (ie, not the new function
but making the edit inside the existing functions).

I'm not sure I like the _component_ naming since it's getting a bit
verbose, but on the other hand it probably should only be the core 
using this stuff (the drivers ought to be able to find their own
regmaps, or at least doing the same lookup) so probably it doesn't
matter terribly much.
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