Module v1

Expand description

This module implements GPIO ABI v1 which was released in Linux v4.8.

This ABI version is deprecated.

ABI v2 adds features and overcomes a number of bugs and limitations present in v1. Use ABI v2 instead where possible.

Structs§

ChipInfo: Information about a particular GPIO chip.
Errno: An error number returned by a kernel ioctl call.
EventRequest: Information about a GPIO event request.
EventRequestFlags: Additional configuration flags for event requests.
HandleConfig: Updated configuration for an existing GPIO handle request.
HandleRequest: Information about a GPIO line handle request.
HandleRequestFlags: Configuration flags for requested lines.
LineEdgeEvent: Information about an edge event on a requested line.
LineInfo: Information about a certain GPIO line.
LineInfoChangeEvent: Information about a change in status of a GPIO line.
LineInfoFlags: Flags indicating the configuration of a line.
LineValues: The logical values of the requested lines.
Name: A uAPI name string, common to ABI v1 and v2.
Offsets: A collection of line offsets.
UnderReadError: A failure to read sufficient bytes to construct an object.
ValidationError: A failure to validate a struct returned from a system call.

NAME_LEN_MAX: The maximum number of bytes stored in a Name.
NUM_LINES_MAX: The maximum number of lines that may be requested in a single request.

get_chip_info: Get the publicly available information for a chip.
get_line_event: Request a line with edge detection enabled.
get_line_handle: Request a line or set of lines for exclusive access.
get_line_info: Get the publicly available information for a line.
get_line_values: Read the values of requested lines.
has_event: Check if the file has an event available to read.
read_event: Read an event from a chip or request file descriptor.
set_line_config: Update the configuration of an existing handle or event request.
set_line_values: Set the values of requested lines.
unwatch_line_info: Remove any watch on changes to the LineInfo for a line.
wait_event: Wait for the file to have an event available to read.
watch_line_info: Add a watch on changes to the LineInfo for a line.