diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index c22b04b2ca1724b26df4440ad1003fbd7d15e796..5c79526245c2e3309a28766b781a9f2bccc850d5 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -273,4 +273,10 @@ static inline unsigned int regmap_get_offset(const struct regmap *map,
 		return index * map->reg_stride;
 }
 
+static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
+						       unsigned int reg)
+{
+	return reg >> map->reg_stride_order;
+}
+
 #endif