On 02/07/2012 03:29 PM, Mark Brown wrote:
and it looks like you'll save a bunch more code if you're able to convert over to using a regmap cache. Note that as a first pass you just need to define which registers are volatile and enable a cache type
- if defaults are omitted then the values will be read back from the
device to start off with.
There's one thing which I need to sort out before I enable the regmap cache for the twl6040 MFD (and remove all other caching of vibra controls in the MFD, and from the ASoC codec driver): In the codec driver I have one 'shadow' register which does not exist on the HW. I'm going to need to have access to that shadow register's bits in the future transparently. I was wondering if we could add support to regmap for such SW only registers. This would only make sens if the cache is enabled. We could have a callback let's say shadow_reg() in remap_config struct. If it is a shadow reg we never reach out for the HW and operate only on the cache. Is this something we can add to regmap?