regulator: Report actual configured voltage to set_voltage()

Change the interface used by set_voltage() to report the selected value
to the regulator core in terms of a selector used by list_voltage().
This allows the regulator core to know the voltage that was chosen
without having to do an explict get_voltage(), which would be much more
expensive as it will generally access hardware.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 592cd7c642c2..4275cd475eac 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -79,7 +79,8 @@ struct regulator_ops {
         int (*list_voltage) (struct regulator_dev *, unsigned selector);
 
         /* get/set regulator voltage */
-        int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV);
+        int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
+                            unsigned *selector);
         int (*get_voltage) (struct regulator_dev *);
 
         /* get/set regulator current  */