diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-04-11 19:21:06 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-04-11 19:25:13 +0200 |
| commit | 39702853197b191bda32315260255053aa3e57f7 (patch) | |
| tree | 00185427bd7c5e6a335c9ea99ed7ee65b9ceaa9c /Documentation/ABI/testing/gpio-cdev | |
| parent | fb8621d3bee88badeb25dccce0fb59ad145dba9e (diff) | |
| parent | bf16200689118d19de1b8d2a3c314fc21f5dc7bb (diff) | |
| download | linux-39702853197b191bda32315260255053aa3e57f7.tar.gz | |
Merge tag 'v4.6-rc3' into drm-intel-next-queued
Linux 4.6-rc3
Backmerge requested by Chris Wilson to make his patches apply cleanly.
Tiny conflict in vmalloc.c with the (properly acked and all) patch in
drm-intel-next:
commit 4da56b99d99e5a7df2b7f11e87bfea935f909732
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon Apr 4 14:46:42 2016 +0100
mm/vmap: Add a notifier for when we run out of vmap address space
and Linus' tree.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'Documentation/ABI/testing/gpio-cdev')
| -rw-r--r-- | Documentation/ABI/testing/gpio-cdev | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/gpio-cdev b/Documentation/ABI/testing/gpio-cdev new file mode 100644 index 000000000000..7b265fbb47e3 --- /dev/null +++ b/Documentation/ABI/testing/gpio-cdev @@ -0,0 +1,26 @@ +What: /dev/gpiochip[0-9]+ +Date: November 2015 +KernelVersion: 4.4 +Contact: linux-gpio@vger.kernel.org +Description: + The character device files /dev/gpiochip* are the interface + between GPIO chips and userspace. + + The ioctl(2)-based ABI is defined and documented in + [include/uapi]<linux/gpio.h>. + + The following file operations are supported: + + open(2) + Currently the only useful flags are O_RDWR. + + ioctl(2) + Initiate various actions. + See the inline documentation in [include/uapi]<linux/gpio.h> + for descriptions of all ioctls. + + close(2) + Stops and free up the I/O contexts that was associated + with the file descriptor. + +Users: TBD |