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/ab3100.c b/drivers/regulator/ab3100.c
index b349266a43de..ed6feaf9398d 100644
--- a/drivers/regulator/ab3100.c
+++ b/drivers/regulator/ab3100.c
@@ -362,7 +362,8 @@ static int ab3100_get_best_voltage_index(struct regulator_dev *reg,
 }
 
 static int ab3100_set_voltage_regulator(struct regulator_dev *reg,
-                                        int min_uV, int max_uV)
+                                        int min_uV, int max_uV,
+                                        unsigned *selector)
 {
         struct ab3100_regulator *abreg = reg->reg_data;
         u8 regval;
@@ -373,6 +374,8 @@ static int ab3100_set_voltage_regulator(struct regulator_dev *reg,
         if (bestindex < 0)
                 return bestindex;
 
+        *selector = bestindex;
+
         err = abx500_get_register_interruptible(abreg->dev, 0,
                                                 abreg->regreg, &regval);
         if (err) {