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authorJani Nikula <ext-jani.1.nikula@nokia.com>2009-12-15 16:46:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 07:20:01 -0800
commit0769746183caff9d4334be48c7b0e7d2ec8716c4 (patch)
treee23768be82bd84cf8331709ecc1fd36c3d468f33 /Documentation/pps
parent35570ac6039ef490b9c5abde1fee4803a39bf4e1 (diff)
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gpiolib: add support for changing value polarity in sysfs
Drivers may use gpiolib sysfs as part of their public user space interface. The GPIO number and polarity might change from board to board. The gpio_export_link() call can be used to hide the GPIO number from user space. Add support for also hiding the GPIO line polarity changes from user space. Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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