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Since the enable(), disable() and is_enabled() operations for most regmap based regulators come down to reading and updating a single register bit we can factor out the code and allow these drivers to just define which bit to update using the enable_reg and enable_mask fields in their desc and then use operations provided by the core. As well as the code saving this opens the door to future optimisation of the bulk operations - if the core can realise that we are updating a single register for multiple regulators then it should be able to combine these updates into a single physical operation. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>