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/max8952.c b/drivers/regulator/max8952.c
index 0d5dda4fd911..a8f4ecfb0843 100644
--- a/drivers/regulator/max8952.c
+++ b/drivers/regulator/max8952.c
@@ -133,7 +133,7 @@ static int max8952_get_voltage(struct regulator_dev *rdev)
 }
 
 static int max8952_set_voltage(struct regulator_dev *rdev,
-                                int min_uV, int max_uV)
+                               int min_uV, int max_uV, unsigned *selector)
 {
         struct max8952_data *max8952 = rdev_get_drvdata(rdev);
         s8 vid = -1, i;
@@ -156,6 +156,7 @@ static int max8952_set_voltage(struct regulator_dev *rdev,
         if (vid >= 0 && vid < MAX8952_NUM_DVS_MODE) {
                 max8952->vid0 = (vid % 2 == 1);
                 max8952->vid1 = (((vid >> 1) % 2) == 1);
+                *selector = vid;
                 gpio_set_value(max8952->pdata->gpio_vid0, max8952->vid0);
                 gpio_set_value(max8952->pdata->gpio_vid1, max8952->vid1);
         } else