diff --git a/[refs] b/[refs]
index 9f374a659a9c..aca019b55426 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c212acccc368a087a53559aac2b7d3be941b1252
+refs/heads/master: 4191f19792bf91267835eb090d970e9cd6277a65
diff --git a/trunk/drivers/base/regmap/regmap.c b/trunk/drivers/base/regmap/regmap.c
index 3c34526091da..b7198f57b69c 100644
--- a/trunk/drivers/base/regmap/regmap.c
+++ b/trunk/drivers/base/regmap/regmap.c
@@ -36,6 +36,9 @@ bool regmap_readable(struct regmap *map, unsigned int reg)
 	if (map->max_register && reg > map->max_register)
 		return false;
 
+	if (map->format.format_write)
+		return false;
+
 	if (map->readable_reg)
 		return map->readable_reg(map->dev, reg);
 
@@ -44,7 +47,7 @@ bool regmap_readable(struct regmap *map, unsigned int reg)
 
 bool regmap_volatile(struct regmap *map, unsigned int reg)
 {
-	if (map->max_register && reg > map->max_register)
+	if (!regmap_readable(map, reg))
 		return false;
 
 	if (map->volatile_reg)
@@ -55,7 +58,7 @@ bool regmap_volatile(struct regmap *map, unsigned int reg)
 
 bool regmap_precious(struct regmap *map, unsigned int reg)
 {
-	if (map->max_register && reg > map->max_register)
+	if (!regmap_readable(map, reg))
 		return false;
 
 	if (map->precious_reg)