diff --git a/[refs] b/[refs]
index a560a12fa4c7..6fa40fda03cb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: de2d808f4de091321978d05a85ef0819e8f3561a
+refs/heads/master: 7cccbdc84487616c3dbe493b04bfa1f362f4bc56
diff --git a/trunk/drivers/mfd/wm831x-core.c b/trunk/drivers/mfd/wm831x-core.c
index e758c89ac5bb..0a2b8d41a702 100644
--- a/trunk/drivers/mfd/wm831x-core.c
+++ b/trunk/drivers/mfd/wm831x-core.c
@@ -1602,6 +1602,8 @@ struct regmap_config wm831x_regmap_config = {
 	.reg_bits = 16,
 	.val_bits = 16,
 
+	.cache_type = REGCACHE_RBTREE,
+
 	.max_register = WM831X_DBE_CHECK_DATA,
 	.readable_reg = wm831x_reg_readable,
 	.writeable_reg = wm831x_reg_writeable,