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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-11-10 14:38:29 +0000
committerLiam Girdwood <lrg@slimlogic.co.uk>2011-01-12 14:32:59 +0000
commit3a93f2a9f4d8f73d74c0e552feb68a10f778a219 (patch)
tree8a9f503f2f061ad3fe9712b0986b0da346f4c8d2 /drivers/regulator/twl-regulator.c
parent63cee946148821bca42be10130b061c2d0f5af7e (diff)
downloadlinaro-lsk-3a93f2a9f4d8f73d74c0e552feb68a10f778a219.tar.gz
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>
Diffstat (limited to 'drivers/regulator/twl-regulator.c')
-rw-r--r--drivers/regulator/twl-regulator.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
index a57262a4fa6..bd332cf1cc3 100644
--- a/drivers/regulator/twl-regulator.c
+++ b/drivers/regulator/twl-regulator.c
@@ -329,7 +329,8 @@ static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
}
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 @@ twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
/* 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_list_voltage(struct regulator_dev *rdev, unsigned index)
}
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 @@ twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
* 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);
}