| .. 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. |
