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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-07-21 14:21:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-22 09:59:41 -0700
commit1673ad52bd9a3c747e596a76e65c55981ea651e3 (patch)
tree9e018b1d511a96f745fc870bfdf8bf53759c25ae /kernel
parent0c36ec31473593aa937ff04f3b3b630e81512734 (diff)
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>
Diffstat (limited to 'kernel')
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