Signed-off-by: NSeongJae Park <sj38.park@gmail.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Remove gpiod_sysfs_set_active_low (and gpio_sysfs_set_active_low) which
allowed code to change the polarity of a gpio line even after it had
been exported through sysfs.

Drivers should not care, and generally does not know, about gpio-line
polarity which is a hardware feature that needs to be described by
firmware.

It is currently possible to define gpio-line polarity in device-tree and
acpi firmware or using platform data. Userspace can also change the
polarity through sysfs.

Note that drivers using the legacy gpio interface could still use
GPIOF_ACTIVE_LOW to change the polarity before exporting the gpio.

There are no in-kernel users of this interface.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Harry Wei <harryxiyou@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@zh-kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: NJohan Hovold <johan@kernel.org>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Since the GENERIC_GPIO has been removed and the documentation of it
has been modified, this patch updates the corresponding documentation of
gpio in Chinese.
Signed-off-by: NChen Baozi <baozich@gmail.com>
Acked-by: NAlexandre Courbot <acourbot@nvidia.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>

Fixes some translation error in Documentation/zh_CN/gpio.txt
The modification is based on Dong Aisheng <b29396@freescale.com>'s
corrections:
    1.Two "OUTPUT" is incorrectly translated as "输入";
    2.five improvement of translation;
    3.Delete a redundant paragraph,
Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
Acked-by: NHarry Wei <harryxiyou@gmail.com>
Acked-by: NDong Aisheng <b29396@freescale.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This is a Chinese translated version of Documentation/gpio.txt
Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
Acked-by: NHarry Wei <harryxiyou@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>