linux.git/Documentation/gpio, branch v4.3

Documentation: gpio: Explain that -gpio is also supported

2015-09-14T07:12:03+00:00

The GPIO documentation mentions that GPIOs are mapped by defining a
-gpios property in the consumer device's node but a -gpio
sufix is also supported after commit:

dd34c37aa3e8 ("gpio: of: Allow -gpio suffix for property names")

Update the documentation to match the implementation.

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Linus Walleij

Documentation: gpio: board: describe the con_id parameter

2015-09-14T07:12:03+00:00

The con_id parameter has to match the GPIO description and is automatically
extended by the GPIO suffix if not NULL. I had to look into the code to
understand this and properly find the GPIO I've been looking for, so document
this.

Signed-off-by: Dirk Behme 
Acked-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

Documentation: gpio: board: add flags parameter to gpiod_get*() functions

2015-09-14T07:12:03+00:00

With commit 39b2bbe3d715 ("gpio: add flags argument to gpiod_get*()
functions") the gpiod_get*() functions got a 'flags' parameter. Reflect
this in the documentation, too.

Signed-off-by: Dirk Behme 
Signed-off-by: Linus Walleij

Documentation: gpio: consumer: describe active low property

2015-08-17T08:38:52+00:00

I've been searching for any documentation of 'the active-low property of a GPIO'
already mentioned in this documenation. But couldn't find any. Add it.

Sigend-off-by: Dirk Behme 
Acked-by: Alexandre Courbot 
[Spelling, grammar fixes]
Signed-off-by: Linus Walleij

gpio: document interaction with other subsystems

2015-07-21T09:39:32+00:00

Now I am very fed up with people reinventing kernel wheels in
userspace "just because they can" (read, sysfs). Put in a angry
blurb in sysfs doc and put in a new file with pointers to other
subsystem drivers utilizing GPIOs.

Signed-off-by: Linus Walleij

Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6

2015-06-25T03:01:36+00:00

Pull documentation updates from Jonathan Corbet:
 "The main thing here is Ingo's big subdirectory documenting feature
  support for each architecture.  Beyond that, it's the usual pile of
  fixes, tweaks, and small additions"

* tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (79 commits)
  doc:md: fix typo in md.txt.
  Documentation/mic/mpssd: don't build x86 userspace when cross compiling
  Documentation/prctl: don't build tsc tests when cross compiling
  Documentation/vDSO: don't build tests when cross compiling
  Doc:ABI/testing: Fix typo in sysfs-bus-fcoe
  Doc: Docbook: Change wikipedia's URL from http to https in scsi.tmpl
  Doc: Change wikipedia's URL from http to https
  Documentation/kernel-parameters: add missing pciserial to the earlyprintk
  Doc:pps: Fix typo in pps.txt
  kbuild : Fix documentation of INSTALL_HDR_PATH
  Documentation: filesystems: updated struct file_operations documentation in vfs.txt
  kbuild: edit explanation of clean-files variable
  Doc: ja_JP: Fix typo in HOWTO
  Move freefall program from Documentation/ to tools/
  Documentation: ARM: EXYNOS: Describe boot loaders interface
  Doc:nfc: Fix typo in nfc-hci.txt
  vfs: Minor documentation fix
  Doc: networking: txtimestamp: fix printf format warning
  Documentation, intel_pstate: Improve legacy mode internal governors description
  Documentation: extend use case for EXPORT_SYMBOL_GPL()
  ...

fix documentation after renaming gpiod_set_array to gpiod_set_array_value

2015-06-04T08:46:43+00:00

Patch "gpiolib: rename gpiod_set_array to gpiod_set_array_value" omitted
to also change the function names in the documentation. Let's fix that.

Signed-off-by: Rojhalat Ibrahim 
Signed-off-by: Linus Walleij

gpiolib: Grammar s/an negative/a negative/

2015-05-22T15:31:15+00:00

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Jonathan Corbet

gpio: remove gpiod_sysfs_set_active_low

2015-05-12T08:46:53+00:00

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 
Cc: Harry Wei 
Cc: Arnd Bergmann 
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@zh-kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: Johan Hovold 
Reviewed-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6

2015-04-18T15:10:49+00:00

Pull documentation updates from Jonathan Corbet:
 "Numerous fixes, the overdue removal of the i2o docs, some new Chinese
  translations, and, hopefully, the README fix that will end the flow of
  identical patches to that file"

* tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (34 commits)
  Documentation/memcg: update memcg/kmem status
  Documentation: blackfin: Makefile: Typo building issue
  Documentation/vm/pagemap.txt: correct location of page-types tool
  Documentation/memory-barriers.txt: typo fix
  doc: Add guest_nice column to example output of `cat /proc/stat'
  Documentation/kernel-parameters: Move "eagerfpu" to its right place
  Documentation: gpio: Update ACPI part of the document to mention _DSD
  docs/completion.txt: Various tweaks and corrections
  doc: completion: context, scope and language fixes
  Documentation:Update Documentation/zh_CN/arm64/memory.txt
  Documentation:Update Documentation/zh_CN/arm64/booting.txt
  Documentation: Chinese translation of arm64/legacy_instructions.txt
  DocBook media: fix broken EIA hyperlink
  Documentation: tweak the maintainers entry
  README: Change gzip/bzip2 to xz compression format
  README: Update version number reference
  doc:pci: Fix typo in Documentation/PCI
  Documentation: drm: Use '->' when describing access through pointers.
  Documentation: Remove mentioning of block barriers
  Documentation/email-clients.txt: Fix one grammar mistake, add extra info about TB
  ...