regulator: wm831x-dcdc: Ensure selected voltage falls within requested range

Use DIV_ROUND_UP to ensure selected voltage won't less than min_uV due to
integer truncation.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 782c228..411cb12 100644 (file)
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -223,7 +223,7 @@ static int wm831x_buckv_map_voltage(struct regulator_dev *rdev,
        if (min_uV < 600000)
                vsel = 0;
        else if (min_uV <= 1800000)
-               vsel = ((min_uV - 600000) / 12500) + 8;
+               vsel = DIV_ROUND_UP(min_uV - 600000, 12500) + 8;
        else
                return -EINVAL;