From: Alexandre Courbot <acourbot@nvidia.com>
Date: Thu, 17 Oct 2013 17:21:36 +0000 (-0700)
Subject: gpiolib: export descriptor-based GPIO interface
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~12^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79a9becda8940deb2274b5aa4577c86d52ee7ecb;p=pandora-kernel.git

gpiolib: export descriptor-based GPIO interface

This patch exports the gpiod_* family of API functions, a safer
alternative to the legacy GPIO interface. Differences between the gpiod
and legacy gpio APIs are:

- gpio works with integers, whereas gpiod operates on opaque handlers
  which cannot be forged or used before proper acquisition
- gpiod get/set functions are aware of the active low state of a GPIO
- gpio consumers should now include <linux/gpio/consumer.h> to access
  the new interface, whereas chips drivers will use
  <linux/gpio/driver.h>

The legacy gpio API is now built as inline functions on top of gpiod.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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