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/88pm8607.c b/drivers/regulator/88pm8607.c
index 2ce2eb71d0f5..dd6308499bd4 100644
--- a/drivers/regulator/88pm8607.c
+++ b/drivers/regulator/88pm8607.c
@@ -249,7 +249,7 @@ static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
 }
 
 static int pm8607_set_voltage(struct regulator_dev *rdev,
-                              int min_uV, int max_uV)
+                              int min_uV, int max_uV, unsigned *selector)
 {
         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
         uint8_t val, mask;
@@ -263,6 +263,7 @@ static int pm8607_set_voltage(struct regulator_dev *rdev,
         ret = choose_voltage(rdev, min_uV, max_uV);
         if (ret < 0)
                 return -EINVAL;
+        *selector = ret;
         val = (uint8_t)(ret << info->vol_shift);
         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;