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The "regulator-initial-mode" and "regulator-mode" DT properties allows to configure the regulator operating modes at startup or when a system enters into a susend state. But these properties use as valid values the operating modes supported by each device while the core deals with the standard operating modes. So a mapping function is needed to translate from the hardware specific modes to the standard ones. This mapping is a non-varying configuration for each regulator, so add a function pointer to struct regulator_desc that will allow drivers to define their callback to do the modes translation. Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Signed-off-by: Mark Brown <broonie@kernel.org>