pcf857x: support working w/o platform data
Provide sane defaults for pcf857x, so the driver can be used w/o providing platform data (and thus can be simply bound via OF tree). Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <david-b@pacbell.net> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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