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>
diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
index a57262a..bd332cf 100644
--- a/drivers/regulator/twl-regulator.c
+++ b/drivers/regulator/twl-regulator.c
@@ -329,7 +329,8 @@
}
static int
-twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
+twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
+ unsigned *selector)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel;
@@ -345,9 +346,11 @@
/* REVISIT for VAUX2, first match may not be best/lowest */
/* use the first in-range value */
- if (min_uV <= uV && uV <= max_uV)
+ if (min_uV <= uV && uV <= max_uV) {
+ *selector = vsel;
return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
VREG_VOLTAGE, vsel);
+ }
}
return -EDOM;
@@ -389,7 +392,8 @@
}
static int
-twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
+twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
+ unsigned *selector)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel;
@@ -402,6 +406,7 @@
* mV = 1000mv + 100mv * (vsel - 1)
*/
vsel = (min_uV/1000 - 1000)/100 + 1;
+ *selector = vsel;
return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel);
}