[alsa-devel] [PATCH 3/3] ASoC: tlv320aic3x: Complete the soc-cache conversion

Jarkko Nikula jhnikula at gmail.com
Tue Sep 14 14:14:45 CEST 2010

On Tue, 14 Sep 2010 13:04:58 +0100
Mark Brown <broonie at opensource.wolfsonmicro.com> wrote:

> On Tue, Sep 14, 2010 at 02:54:49PM +0300, Jarkko Nikula wrote:
> > Complete the phasing out of aic3x_read_reg_cache, aic3x_write_reg_cache,
> > aic3x_read and aic3x_write calls.
> > 
> > This patch replaces the aic3x_read with codec->hw_read that points to a
> > function implemented by soc-cache. There is no need to cache the value from
> > chip since the functions using aic3x_read are interested only read-only
> > bits.
> > 
> > Signed-off-by: Jarkko Nikula <jhnikula at gmail.com>
> It'd be a bit nicer to do this by using snd_soc_read() here also and
> marking the registers as volatile.  This makes the process much less
> error prone since users can just use snd_soc_read() and the register
> cache code will work out if it needs to go to the chip or not.

Actually I looked that but problem with aic3x is that most of the
volatile bits are with r/w configuration bits in the same registers.
There are a few completely volatile read-only registers but currently
there is no use for them.


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