diff options
Diffstat (limited to 'Documentation/ABI/testing/gpio-cdev')
| -rw-r--r-- | Documentation/ABI/testing/gpio-cdev | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/gpio-cdev b/Documentation/ABI/testing/gpio-cdev index 7b265fbb47e3..c9689b2a6fed 100644 --- a/Documentation/ABI/testing/gpio-cdev +++ b/Documentation/ABI/testing/gpio-cdev @@ -6,21 +6,23 @@ 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 ioctl(2)-based ABI is defined in + [include/uapi]<linux/gpio.h> and documented in + Documentation/userspace-api/gpio/chardev.rst. The following file operations are supported: open(2) - Currently the only useful flags are O_RDWR. + 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. + Initiate various actions. + + See Documentation/userspace-api/gpio/chardev.rst + for a description of all ioctls. close(2) - Stops and free up the I/O contexts that was associated - with the file descriptor. + Stops and free up the I/O contexts that was associated + with the file descriptor. Users: TBD |