diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c
index 0a4fd449c27d..3315994d7e31 100644
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -936,6 +936,8 @@ static int da9121_assign_chip_model(struct i2c_client *i2c,
 		chip->variant_id = DA9121_TYPE_DA9220_DA9132;
 		regmap = &da9121_2ch_regmap_config;
 		break;
+	default:
+		return -EINVAL;
 	}
 
 	/* Set these up for of_regulator_match call which may want .of_map_modes */