diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 42c69e75b131..33d5f1d9f882 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -280,6 +280,13 @@ static inline int regcache_sync(struct regmap *map)
 	return -EINVAL;
 }
 
+static inline int regcache_sync_region(struct regmap *map, unsigned int min,
+				       unsigned int max)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline void regcache_cache_only(struct regmap *map, bool enable)
 {
 	WARN_ONCE(1, "regmap API is disabled");