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/drivers/regulator/max8649.c b/drivers/regulator/max8649.c
index 6b60a9c0366b..30eb9e54f7ec 100644
--- a/drivers/regulator/max8649.c
+++ b/drivers/regulator/max8649.c
@@ -155,7 +155,7 @@ static int max8649_get_voltage(struct regulator_dev *rdev)
 }
 
 static int max8649_set_voltage(struct regulator_dev *rdev,
-                               int min_uV, int max_uV)
+                               int min_uV, int max_uV, unsigned *selector)
 {
         struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
         unsigned char data, mask;
@@ -168,6 +168,7 @@ static int max8649_set_voltage(struct regulator_dev *rdev,
         data = (min_uV - MAX8649_DCDC_VMIN + MAX8649_DCDC_STEP - 1)
                 / MAX8649_DCDC_STEP;
         mask = MAX8649_VOL_MASK;
+        *selector = data & mask;
 
         return max8649_set_bits(info->i2c, info->vol_reg, mask, data);
 }