9dfd338198
Some I2C controllers have high overheads for setting up I2C operations which makes the register cache setup on startup excessively slow since it does a lot of small transactions. Reduce this overhead by doing a bulk read of the entire register bank and filtering out what we don't need later. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@openedhand.com>