Commit c2746a1e authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

docs: gpio: add sysfs interface to the admin-guide 



While this is stated as obsoleted, the sysfs interface described
there is still valid, and belongs to the admin-guide.

Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4c68060b

Documentation/ABI/obsolete/sysfs-gpio

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@@ -11,7 +11,7 @@ Description: 
  Kernel code may export it for complete or partial access.



  GPIOs are identified as they are inside the kernel, using integers in

  the range 0..INT_MAX.  See Documentation/gpio for more information.

  the range 0..INT_MAX.  See Documentation/admin-guide/gpio for more information.



    /sys/class/gpio

	/export ... asks the kernel to export a GPIO to userspace

Documentation/gpio/index.rst→Documentation/admin-guide/gpio/index.rst

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:orphan:

.. SPDX-License-Identifier: GPL-2.0



====

gpio

Documentation/admin-guide/index.rst

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@@ -91,6 +91,7 @@ configure specific aspects of kernel behavior to your liking. 
   cputopology

   device-mapper/index

   efi-stub

   gpio/index

   highuid

   hw_random

   iostats

Documentation/firmware-guide/acpi/enumeration.rst

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@@ -316,7 +316,7 @@ specifies the path to the controller. In order to use these GPIOs in Linux 
we need to translate them to the corresponding Linux GPIO descriptors.



There is a standard GPIO API for that and is documented in

Documentation/gpio/.

Documentation/admin-guide/gpio/.



In the above example we can get the corresponding two GPIO descriptors with

a code like this::

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