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authorAxel Lin <axel.lin@gmail.com>2012-03-05 20:27:56 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-03-11 20:39:10 +0000
commit9365121869a15da99d6091802f11a82d59024d62 (patch)
tree2cb60af6d279a16cf76e560e40982eb0bb7904c4
parent7b95765495d0b296cf35e97e68c780b208c85ad5 (diff)
downloadlinux-sh-9365121869a15da99d6091802f11a82d59024d62.tar.gz
regulator: da9052: Ensure the selected voltage falls within the specified range
Integer division may truncate the result, use DIV_ROUND_UP to ensure the selected voltage falls within the specified range. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-rw-r--r--drivers/regulator/da9052-regulator.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index 319ba51fe61d..09915e89705d 100644
--- a/drivers/regulator/da9052-regulator.c
+++ b/drivers/regulator/da9052-regulator.c
@@ -226,7 +226,7 @@ static int da9052_regulator_set_voltage_int(struct regulator_dev *rdev,
if (min_uV < info->min_uV)
min_uV = info->min_uV;
- *selector = (min_uV - info->min_uV) / info->step_uV;
+ *selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
ret = da9052_list_voltage(rdev, *selector);
if (ret < 0)
@@ -318,10 +318,10 @@ static int da9052_set_buckperi_voltage(struct regulator_dev *rdev, int min_uV,
if ((regulator->da9052->chip_id == DA9052) &&
(min_uV >= DA9052_CONST_3uV))
*selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
- ((min_uV - DA9052_CONST_3uV) /
- (DA9052_BUCK_PERI_3uV_STEP));
+ DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
+ DA9052_BUCK_PERI_3uV_STEP);
else
- *selector = (min_uV - info->min_uV) / info->step_uV;
+ *selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
ret = da9052_list_buckperi_voltage(rdev, *selector);
if (ret < 0)