GPIO_GET_LINEINFO_IOCTL

Warning

This ioctl is part of GPIO Character Device Userspace API (v1) and is obsoleted by GPIO_V2_GET_LINEINFO_IOCTL.

Name

GPIO_GET_LINEINFO_IOCTL - Get the publicly available information for a line.

Synopsis

GPIO_GET_LINEINFO_IOCTL

int ioctl(int chip_fd, GPIO_GET_LINEINFO_IOCTL, struct gpioline_info *info)

Arguments

chip_fd

The file descriptor of the GPIO character device returned by open().

info

The line_info to be populated, with the offset field set to indicate the line to be collected.

Description

Get the publicly available information for a line.

This information is available independent of whether the line is in use.

Note

The line info does not include the line value.

The line must be requested using GPIO_GET_LINEHANDLE_IOCTL or GPIO_GET_LINEEVENT_IOCTL to access its value.

Return Value

On success 0 and info is populated with the chip info.

On error -1 and the errno variable is set appropriately. Common error codes are described in GPIO Error Codes.