regulator: Simplify the code to get selector in isl6271a_set_voltage

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 3 insertions, 11 deletions

diff --git a/drivers/regulator/isl6271a-regulator.c b/drivers/regulator/isl6271a-regulator.c
index c1a456c4257c..775f5fd208c3 100644
--- a/drivers/regulator/isl6271a-regulator.c
+++ b/drivers/regulator/isl6271a-regulator.c
@@ -63,23 +63,15 @@ static int isl6271a_set_voltage(struct regulator_dev *dev,
                                 unsigned *selector)
 {
         struct isl_pmic *pmic = rdev_get_drvdata(dev);
-        int vsel, err, data;
+        int err, data;
 
         if (minuV < ISL6271A_VOLTAGE_MIN || minuV > ISL6271A_VOLTAGE_MAX)
                 return -EINVAL;
         if (maxuV < ISL6271A_VOLTAGE_MIN || maxuV > ISL6271A_VOLTAGE_MAX)
                 return -EINVAL;
 
-        /* Align to 50000 mV */
-        vsel = minuV - (minuV % ISL6271A_VOLTAGE_STEP);
-
-        /* If the result fell out of [minuV,maxuV] range, put it back */
-        if (vsel < minuV)
-                vsel += ISL6271A_VOLTAGE_STEP;
-
-        /* Convert the microvolts to data for the chip */
-        data = (vsel - ISL6271A_VOLTAGE_MIN) / ISL6271A_VOLTAGE_STEP;
-
+        data = DIV_ROUND_UP(minuV - ISL6271A_VOLTAGE_MIN,
+                            ISL6271A_VOLTAGE_STEP);
         *selector = data;
 
         mutex_lock(&pmic->mtx);