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, 4 insertions, 1 deletions

diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index db6b70f20511..2f4ec0facef1 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -215,7 +215,8 @@ static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
 }
 
 static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
-                int min_uV, int max_uV)
+                                        int min_uV, int max_uV,
+                                        unsigned *selector)
 {
         int regulator_id, ret;
         struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
@@ -232,6 +233,8 @@ static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
                 return ret;
         }
 
+        *selector = ret;
+
         /* set the registers for the request */
         ret = abx500_mask_and_set_register_interruptible(info->dev,
                 info->voltage_bank, info->voltage_reg,