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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
commit | d635711daa98be86d4c7fd01499c34f566b54ccb (patch) | |
tree | aa5cc3760a27c3d57146498cb82fa549547de06c /Documentation/ABI/testing/sysfs-gpio | |
parent | c91265cd0efb83778f015b4d4b1129bd2cfd075e (diff) |
Linux-libre 4.6.2-gnu
Diffstat (limited to 'Documentation/ABI/testing/sysfs-gpio')
-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 55ffa2df1..000000000 --- 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) - |