diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
index 2d38c2493a07..634f2575b93f 100644
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -112,16 +112,11 @@ static const struct voltage_map_desc *ldo_voltage_map[] = {
 	&buck4_voltage_map_desc,	/* BUCK4 */
 };
 
-static inline int max8998_get_ldo(struct regulator_dev *rdev)
-{
-	return rdev_get_id(rdev);
-}
-
 static int max8998_list_voltage(struct regulator_dev *rdev,
 				unsigned int selector)
 {
 	const struct voltage_map_desc *desc;
-	int ldo = max8998_get_ldo(rdev);
+	int ldo = rdev_get_id(rdev);
 	int val;
 
 	if (ldo >= ARRAY_SIZE(ldo_voltage_map))
@@ -141,7 +136,7 @@ static int max8998_list_voltage(struct regulator_dev *rdev,
 static int max8998_get_enable_register(struct regulator_dev *rdev,
 					int *reg, int *shift)
 {
-	int ldo = max8998_get_ldo(rdev);
+	int ldo = rdev_get_id(rdev);
 
 	switch (ldo) {
 	case MAX8998_LDO2 ... MAX8998_LDO5:
@@ -222,7 +217,7 @@ static int max8998_ldo_disable(struct regulator_dev *rdev)
 static int max8998_get_voltage_register(struct regulator_dev *rdev,
 				int *_reg, int *_shift, int *_mask)
 {
-	int ldo = max8998_get_ldo(rdev);
+	int ldo = rdev_get_id(rdev);
 	struct max8998_data *max8998 = rdev_get_drvdata(rdev);
 	int reg, shift = 0, mask = 0xff;
 
@@ -310,7 +305,7 @@ static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
 	struct i2c_client *i2c = max8998->iodev->i2c;
 	int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
 	const struct voltage_map_desc *desc;
-	int ldo = max8998_get_ldo(rdev);
+	int ldo = rdev_get_id(rdev);
 	int reg, shift = 0, mask, ret;
 	int i = 0;
 
@@ -362,7 +357,7 @@ static int max8998_set_voltage_buck(struct regulator_dev *rdev,
 	struct i2c_client *i2c = max8998->iodev->i2c;
 	int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
 	const struct voltage_map_desc *desc;
-	int buck = max8998_get_ldo(rdev);
+	int buck = rdev_get_id(rdev);
 	int reg, shift = 0, mask, ret;
 	int difference = 0, i = 0, j = 0, previous_vol = 0;
 	u8 val = 0;