pinctrl: cherryview: prevent concurrent access to GPIO controllers
authorDan O'Donovan <dan@emutex.com>
Fri, 10 Jun 2016 12:23:34 +0000 (13:23 +0100)
committerLinus Walleij <linus.walleij@linaro.org>
Wed, 15 Jun 2016 06:37:39 +0000 (08:37 +0200)
commit0bd50d719b004110e791800450ad204399100a86
tree66e7d62be093590ebee00f7c148b1cf15b0230cd
parent38c1e5e7b91dfa82547657269cabf5fba66c7a2b
pinctrl: cherryview: prevent concurrent access to GPIO controllers

Due to a silicon issue on the Atom X5-Z8000 "Cherry Trail" processor
series, a common lock must be used to prevent concurrent accesses
across the 4 GPIO controllers managed by this driver.

See Intel Atom Z8000 Processor Series Specification Update
(Rev. 005), errata #CHT34, for further information.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Dan O'Donovan <dan@emutex.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/pinctrl/intel/pinctrl-cherryview.c