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, 6 insertions, 2 deletions

diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index fe4b8a8a9dfd..7e45b0ddd710 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -360,7 +360,7 @@ int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode,
 EXPORT_SYMBOL_GPL(wm8350_isink_set_flash);
 
 static int wm8350_dcdc_set_voltage(struct regulator_dev *rdev, int min_uV,
-        int max_uV)
+                                   int max_uV, unsigned *selector)
 {
         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
         int volt_reg, dcdc = rdev_get_id(rdev), mV,
@@ -397,6 +397,8 @@ static int wm8350_dcdc_set_voltage(struct regulator_dev *rdev, int min_uV,
                 return -EINVAL;
         }
 
+        *selector = mV;
+
         /* all DCDCs have same mV bits */
         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK;
         wm8350_reg_write(wm8350, volt_reg, val | mV);
@@ -754,7 +756,7 @@ static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev)
 }
 
 static int wm8350_ldo_set_voltage(struct regulator_dev *rdev, int min_uV,
-        int max_uV)
+                                  int max_uV, unsigned *selector)
 {
         struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
         int volt_reg, ldo = rdev_get_id(rdev), mV, min_mV = min_uV / 1000,
@@ -797,6 +799,8 @@ static int wm8350_ldo_set_voltage(struct regulator_dev *rdev, int min_uV,
                 return -EINVAL;
         }
 
+        *selector = mV;
+
         /* all LDOs have same mV bits */
         val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK;
         wm8350_reg_write(wm8350, volt_reg, val | mV);