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¶
- 
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 (v2) and GPIO_GET_LINEINFO_WATCH_IOCTL (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 GPIO Error Codes.