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authorLinus Walleij <linus.walleij@linaro.org>2011-11-14 10:06:22 +0100
committerLinus Walleij <linus.walleij@linaro.org>2012-01-03 09:10:01 +0100
commit542e704f3ffee1dc4539c9e8191e4dc215220f5e (patch)
treeda2f8aae8bedb6e3216b4808dc743eb94c3270e3 /fs
parent75d6642a3ee1dfe2552028997cdcc2c4207bec8f (diff)
pinctrl: GPIO direction support for muxing
When requesting a single GPIO pin to be muxed in, some controllers will need to poke a different value into the control register depending on whether the pin will be used for GPIO output or GPIO input. So create pinmux counterparts to gpio_direction_[input|output] in the pinctrl framework. ChangeLog v1->v2: - This also amends the documentation to make it clear the this function and associated machinery is *ONLY* intended as a backend to gpiolib machinery, not for everyone and his dog to start playing around with pins. ChangeLog v2->v3: - Don't pass an argument to the common request function, instead provide pinmux_* counterparts to the gpio_direction_[input|output] calls, simpler and anyone can understand it. ChangeLog v3->v4: - Fix numerous spelling mistakes and dangling text in documentation. Add Ack and Rewewed-by. Cc: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Thomas Abraham <thomas.abraham@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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