[alsa-devel] [PATCH] [v3] ASoC: cs4270: use the built-in register cache support

[Mark Brown]

On Mon, Jan 10, 2011 at 01:28:32PM -0600, Timur Tabi wrote:
> Update the CS4270 driver to use ASoC's internal codec register cache feature.
> This change allows ASoC to perform the low-level I2C operations necessary to
> read the register cache.  Support is also added for initializing the register
> cache with an array of known power-on default values.
> 
> The CS4270 driver was handling the register cache itself, but somwhere along
> the conversion to multi-compaonent, this feature broke.
> 
> Signed-off-by: Timur Tabi <timur at freescale.com>

Applied, thanks.

> Mark, I don't have power-management support working on my hardware, so I can't
> test cs4270_soc_resume(), but I have a suspicion that the call to
> i2c_smbus_write_byte_data() should be replaced with codec->hw_write().

Like Liam said snd_soc_cache_sync() is probably what you're looking for
here.