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, 8 insertions, 2 deletions

diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c
index 3bb82b624e19..0f22ef12601c 100644
--- a/drivers/regulator/lp3971.c
+++ b/drivers/regulator/lp3971.c
@@ -168,7 +168,8 @@ static int lp3971_ldo_get_voltage(struct regulator_dev *dev)
 }
 
 static int lp3971_ldo_set_voltage(struct regulator_dev *dev,
-                                  int min_uV, int max_uV)
+                                  int min_uV, int max_uV,
+                                  unsigned int *selector)
 {
         struct lp3971 *lp3971 = rdev_get_drvdata(dev);
         int ldo = rdev_get_id(dev) - LP3971_LDO1;
@@ -187,6 +188,8 @@ static int lp3971_ldo_set_voltage(struct regulator_dev *dev,
         if (val > LDO_VOL_MAX_IDX || vol_map[val] > max_vol)
                 return -EINVAL;
 
+        *selector = val;
+
         return lp3971_set_bits(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo),
                         LDO_VOL_CONTR_MASK << LDO_VOL_CONTR_SHIFT(ldo),
                         val << LDO_VOL_CONTR_SHIFT(ldo));
@@ -256,7 +259,8 @@ static int lp3971_dcdc_get_voltage(struct regulator_dev *dev)
 }
 
 static int lp3971_dcdc_set_voltage(struct regulator_dev *dev,
-                                  int min_uV, int max_uV)
+                                   int min_uV, int max_uV,
+                                   unsigned int *selector)
 {
         struct lp3971 *lp3971 = rdev_get_drvdata(dev);
         int buck = rdev_get_id(dev) - LP3971_DCDC1;
@@ -277,6 +281,8 @@ static int lp3971_dcdc_set_voltage(struct regulator_dev *dev,
         if (val > BUCK_TARGET_VOL_MAX_IDX || vol_map[val] > max_vol)
                 return -EINVAL;
 
+        *selector = val;
+
         ret = lp3971_set_bits(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck),
                BUCK_TARGET_VOL_MASK, val);
         if (ret)