diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 3592ccb4e603..9d5d9159040f 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -294,11 +294,11 @@ static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
 	return val;
 }
 
-static inline int s5m8767_convert_voltage(
+static int s5m8767_convert_voltage_to_sel(
 		const struct s5m_voltage_desc *desc,
 		int min_vol, int max_vol)
 {
-	int out_vol = 0;
+	int selector = 0;
 
 	if (desc == NULL)
 		return -EINVAL;
@@ -306,19 +306,18 @@ static inline int s5m8767_convert_voltage(
 	if (max_vol < desc->min || min_vol > desc->max)
 		return -EINVAL;
 
-	out_vol = (min_vol - desc->min) / desc->step;
+	selector = (min_vol - desc->min) / desc->step;
 
-	if (desc->min + desc->step * out_vol > max_vol)
+	if (desc->min + desc->step * selector > max_vol)
 		return -EINVAL;
 
-	return out_vol;
+	return selector;
 }
 
 static int s5m8767_set_voltage(struct regulator_dev *rdev,
 				int min_uV, int max_uV, unsigned *selector)
 {
 	struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
-	int min_vol = min_uV, max_vol = max_uV;
 	const struct s5m_voltage_desc *desc;
 	int reg_id = rdev_get_id(rdev);
 	int reg, mask, ret;
@@ -343,7 +342,7 @@ static int s5m8767_set_voltage(struct regulator_dev *rdev,
 
 	desc = reg_voltage_map[reg_id];
 
-	i = s5m8767_convert_voltage(desc, min_vol, max_vol);
+	i = s5m8767_convert_voltage_to_sel(desc, min_uV, max_uV);
 	if (i < 0)
 		return i;
 
@@ -385,7 +384,6 @@ static int s5m8767_set_voltage_buck(struct regulator_dev *rdev,
 	int reg_id = rdev_get_id(rdev);
 	const struct s5m_voltage_desc *desc;
 	int new_val, old_val, i = 0;
-	int min_vol = min_uV, max_vol = max_uV;
 
 	if (reg_id < S5M8767_BUCK1 || reg_id > S5M8767_BUCK6)
 		return -EINVAL;
@@ -402,7 +400,7 @@ static int s5m8767_set_voltage_buck(struct regulator_dev *rdev,
 	}
 
 	desc = reg_voltage_map[reg_id];
-	new_val = s5m8767_convert_voltage(desc, min_vol, max_vol);
+	new_val = s5m8767_convert_voltage_to_sel(desc, min_uV, max_uV);
 	if (new_val < 0)
 		return new_val;
 
@@ -580,7 +578,7 @@ static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
 	for (i = 0; i < 8; i++) {
 		if (s5m8767->buck2_gpiodvs) {
 			s5m8767->buck2_vol[i] =
-				s5m8767_convert_voltage(
+				s5m8767_convert_voltage_to_sel(
 						&buck_voltage_val2,
 						pdata->buck2_voltage[i],
 						pdata->buck2_voltage[i] +
@@ -589,7 +587,7 @@ static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
 
 		if (s5m8767->buck3_gpiodvs) {
 			s5m8767->buck3_vol[i] =
-				s5m8767_convert_voltage(
+				s5m8767_convert_voltage_to_sel(
 						&buck_voltage_val2,
 						pdata->buck3_voltage[i],
 						pdata->buck3_voltage[i] +
@@ -598,7 +596,7 @@ static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
 
 		if (s5m8767->buck4_gpiodvs) {
 			s5m8767->buck4_vol[i] =
-				s5m8767_convert_voltage(
+				s5m8767_convert_voltage_to_sel(
 						&buck_voltage_val2,
 						pdata->buck4_voltage[i],
 						pdata->buck4_voltage[i] +