Add Generic GPIO driver
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This patch adds generic memory-mapped GPIO controller support.
Code taken from Linux Kernel and adopted for barebox.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Alexander Shiyan
authored
on 11 Mar 2013
Sascha Hauer
committed
on 11 Mar 2013