diff options
Diffstat (limited to 'Documentation/userspace-api/gpio/gpio-get-lineevent-ioctl.rst')
| -rw-r--r-- | Documentation/userspace-api/gpio/gpio-get-lineevent-ioctl.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/userspace-api/gpio/gpio-get-lineevent-ioctl.rst b/Documentation/userspace-api/gpio/gpio-get-lineevent-ioctl.rst index 7d0b932925c6..09a9254f38cf 100644 --- a/Documentation/userspace-api/gpio/gpio-get-lineevent-ioctl.rst +++ b/Documentation/userspace-api/gpio/gpio-get-lineevent-ioctl.rst @@ -48,6 +48,12 @@ to its default state. Requesting a line already in use is an error (**EBUSY**). +Requesting edge detection on a line that does not support interrupts is an +error (**ENXIO**). + +As with the :ref:`line handle<gpio-get-linehandle-config-support>`, the +bias configuration is best effort. + Closing the ``chip_fd`` has no effect on existing line events. Configuration Rules |