tree fea01da763018049a4d3cfeefcbea4958e2550ef
parent 5ab49db8e007c4479be1a682ea64d9b562aa4880
author Mika Westerberg <mika.westerberg@linux.intel.com> 1438689794 +0300
committer Linus Walleij <linus.walleij@linaro.org> 1439468774 +0200

pinctrl: baytrail: Serialize all register access

There is a hardware issue in Intel Baytrail where concurrent GPIO register
access might result reads of 0xffffffff and writes might get dropped
completely.

Prevent this from happening by taking the serializing lock in all places
where it is possible that more than one thread might be accessing the
hardware concurrently.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>