GPIO_V2_GET_LINEINFO_IOCTL¶

Name¶

GPIO_V2_GET_LINEINFO_IOCTL - Get the publicly available information for a line.

int ioctl(int chip_fd, GPIO_V2_GET_LINEINFO_IOCTL, struct gpio_v2_line_info *info)

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.

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_V2_GET_LINE_IOCTL to access its 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.