Re: [PATCH v2 08/23] gpio: remove gpiod_sysfs_set_active_low

[Linus Walleij <linus.walleij@linaro.org>]

On Mon, May 4, 2015 at 5:10 PM, Johan Hovold <johan@kernel.org> wrote:

> 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: Johan Hovold <johan@kernel.org>

GOOD RIDDANCE.

Patch applied.

Yours,
Linus Walleij