1 .. SPDX-License-Identifier: GPL-2.0 2 3 .. _GPIO_GET_LINEINFO_UNWATCH_IOCTL: 4 5 ******************************* 6 GPIO_GET_LINEINFO_UNWATCH_IOCTL 7 ******************************* 8 9 Name 10 ==== 11 12 GPIO_GET_LINEINFO_UNWATCH_IOCTL - Disable watching a line for changes to its 13 requested state and configuration information. 14 15 Synopsis 16 ======== 17 18 .. c:macro:: GPIO_GET_LINEINFO_UNWATCH_IOCTL 19 20 ``int ioctl(int chip_fd, GPIO_GET_LINEINFO_UNWATCH_IOCTL, u32 *offset)`` 21 22 Arguments 23 ========= 24 25 ``chip_fd`` 26 The file descriptor of the GPIO character device returned by `open()`. 27 28 ``offset`` 29 The offset of the line to no longer watch. 30 31 Description 32 =========== 33 34 Remove the line from the list of lines being watched on this ``chip_fd``. 35 36 This is the reverse of gpio-v2-get-lineinfo-watch-ioctl.rst (v2) and 37 gpio-get-lineinfo-watch-ioctl.rst (v1). 38 39 Unwatching a line that is not watched is an error (**EBUSY**). 40 41 First added in 5.7. 42 43 Return Value 44 ============ 45 46 On success 0. 47 48 On error -1 and the ``errno`` variable is set appropriately. 49 Common error codes are described in error-codes.rst.
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