diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 42d5cb0f503f..26af93a2595d 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -500,6 +500,12 @@ struct regmap *regmap_init(struct device *dev,
 		}
 		break;
 
+	case 24:
+		if (reg_endian != REGMAP_ENDIAN_BIG)
+			goto err_map;
+		map->format.format_reg = regmap_format_24;
+		break;
+
 	case 32:
 		switch (reg_endian) {
 		case REGMAP_ENDIAN_BIG: