mfd: Enable rbtree cache for wm831x devices
Most useful with the regulators where we're doing a lot of read/modify/write
updates in potentially performance critical paths. Providing some defaults
would make this slightly better but this is a win right now.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index e758c89..0a2b8d4 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1602,6 +1602,8 @@
.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,