.. SPDX-License-Identifier: GPL-2.0

.. _GPIO_GET_LINEINFO_UNWATCH_IOCTL:

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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.