On Mon, Nov 07, 2022 at 12:37:00PM +0200, Andy Shevchenko wrote: > On Thu, Nov 03, 2022 at 07:20:46AM -0400, William Breathitt Gray wrote: > > The regmap API supports IO port accessors so we can take advantage of > > regmap abstractions rather than handling access to the device registers > > directly in the driver. > > > > Precursor patches are provided for 104-dio-48e and 104-idi-48 to migrate > > their respective device-specific registers first in order to simplify > > the subsequent patch migrating the i8255 library and its dependents. > > > > The struct i8255 control_state member serves as a cache of the i8255 > > device's control register. Does the regmap API support caching such that > > we won't need to manually update a control_state member? > > Yes, regmap supports caching and IIRC it's opt-out. Looks like it's disabled by default if I understand correctly: the cache_type member of struct regmap_config has a default value of REGCACHE_NONE if not explicitly set. I'll set cache_type to enable caching and remove the control_state member in v2 then. William Breathitt Gray
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