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| author | Linus Walleij <linus.walleij@linaro.org> | 2015-10-22 09:58:34 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-02-09 11:09:55 +0100 |
| commit | fe95046e960b4b76e73dc1486955d93f47276134 (patch) | |
| tree | 8f4fbd0faab1ac26968ae6ac28ea9554dcfd1fff /Documentation/ABI/testing | |
| parent | 40c159b776f882f2e2cbe20c9e29832841e5c0f9 (diff) | |
| download | linux-fe95046e960b4b76e73dc1486955d93f47276134.tar.bz2 | |
gpio: ABI: mark the sysfs ABI as obsolete
This marks the (optional) sysfs GPIO ABI as obsolete and schedules
it for removal in 2020.
Cc: Johan Hovold <johan@kernel.org>
Cc: Michael Welling <mwelling@ieee.org>
Cc: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-gpio | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/Documentation/ABI/testing/sysfs-gpio b/Documentation/ABI/testing/sysfs-gpio deleted file mode 100644 index 55ffa2df1c10..000000000000 --- a/Documentation/ABI/testing/sysfs-gpio +++ /dev/null @@ -1,28 +0,0 @@ -What: /sys/class/gpio/ -Date: July 2008 -KernelVersion: 2.6.27 -Contact: David Brownell <dbrownell@users.sourceforge.net> -Description: - - As a Kconfig option, individual GPIO signals may be accessed from - userspace. GPIOs are only made available to userspace by an explicit - "export" operation. If a given GPIO is not claimed for use by - kernel code, it may be exported by userspace (and unexported later). - 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.txt for more information. - - /sys/class/gpio - /export ... asks the kernel to export a GPIO to userspace - /unexport ... to return a GPIO to the kernel - /gpioN ... for each exported GPIO #N OR - /<LINE-NAME> ... for a properly named GPIO line - /value ... always readable, writes fail for input GPIOs - /direction ... r/w as: in, out (default low); write: high, low - /edge ... r/w as: none, falling, rising, both - /gpiochipN ... for each gpiochip; #N is its first GPIO - /base ... (r/o) same as N - /label ... (r/o) descriptive, not necessarily unique - /ngpio ... (r/o) number of GPIOs; numbered N to N + (ngpio - 1) - |