regulator: enable/disable refcounting
Make the <linux/regulator.h> framework treat enable/disable call pairs like the <linux/clk.h> and <linux/interrupt.h> frameworks do: they're refcounted, so that different parts of a driver don't need to put work into coordination that frameworks normally handle. It's a minor object code shrink. It also makes the regulator_is_disabled() kerneldoc say what it's actually returning: return value is not a refcount, and may report an error (e.g. I/O error from I2C). It also fixes some minor regulator_put() goofage: removing unlocked access to the enable state. (But still not making regulator put/get match the refcounting pattern they invoke.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
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