From: David Brownell <dbrownell@users.sourceforge.net>
Date: Mon, 21 Jul 2008 21:21:34 +0000 (-0700)
Subject: gpio: pcf857x: add lock and handle more chips
X-Git-Tag: v2.6.27-rc1~943
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1673ad52bd9a3c747e596a76e65c55981ea651e3;p=pandora-kernel.git

gpio: pcf857x: add lock and handle more chips

Two small updates to the pcf857x driver: (a) the max732[89] chips are
also second sources for the pcf8574/a, and (b) add a mutex to prevent
trashing the cached state.  Adding the lock is effectively a bugfix,
although it seems unlikely that anyone would have run into the issue it
protects against.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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