| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849 |
- .. SPDX-License-Identifier: GPL-2.0
- .. _GPIO_GET_LINEINFO_UNWATCH_IOCTL:
- *******************************
- GPIO_GET_LINEINFO_UNWATCH_IOCTL
- *******************************
- Name
- ====
- GPIO_GET_LINEINFO_UNWATCH_IOCTL - Disable watching a line for changes to its
- requested state and configuration information.
- Synopsis
- ========
- .. c:macro:: GPIO_GET_LINEINFO_UNWATCH_IOCTL
- ``int ioctl(int chip_fd, GPIO_GET_LINEINFO_UNWATCH_IOCTL, u32 *offset)``
- Arguments
- =========
- ``chip_fd``
- The file descriptor of the GPIO character device returned by `open()`.
- ``offset``
- The offset of the line to no longer watch.
- Description
- ===========
- Remove the line from the list of lines being watched on this ``chip_fd``.
- This is the reverse of gpio-v2-get-lineinfo-watch-ioctl.rst (v2) and
- gpio-get-lineinfo-watch-ioctl.rst (v1).
- Unwatching a line that is not watched is an error (**EBUSY**).
- First added in 5.7.
- Return Value
- ============
- On success 0.
- On error -1 and the ``errno`` variable is set appropriately.
- Common error codes are described in error-codes.rst.
|
