Documentation/userspace-api/media/rc/lirc-get-timeout.rst

File Facts

System

Linux kernel

Corpus path

Documentation/userspace-api/media/rc/lirc-get-timeout.rst

Extension

.rst

Size

1435 bytes

Lines

58

Domain

Support Tooling And Documentation

Bucket

Documentation

Inferred role

Support Tooling And Documentation: documentation

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
.. c:namespace:: RC

.. _lirc_get_min_timeout:
.. _lirc_get_max_timeout:

****************************************************
ioctls LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT
****************************************************

Name
====

LIRC_GET_MIN_TIMEOUT / LIRC_GET_MAX_TIMEOUT - Obtain the possible timeout
range for IR receive.

Synopsis
========

.. c:macro:: LIRC_GET_MIN_TIMEOUT

``int ioctl(int fd, LIRC_GET_MIN_TIMEOUT, __u32 *timeout)``

.. c:macro:: LIRC_GET_MAX_TIMEOUT

``int ioctl(int fd, LIRC_GET_MAX_TIMEOUT, __u32 *timeout)``

Arguments
=========

``fd``
    File descriptor returned by open().

``timeout``
    Timeout, in microseconds.

Description
===========

Some devices have internal timers that can be used to detect when
there's no IR activity for a long time. This can help lircd in
detecting that a IR signal is finished and can speed up the decoding
process. Returns an integer value with the minimum/maximum timeout
that can be set.

.. note::

   Some devices have a fixed timeout, in that case
   both ioctls will return the same value even though the timeout
   cannot be changed via :ref:`LIRC_SET_REC_TIMEOUT`.

Return Value
============

On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.

Annotation

• Atlas domain: Support Tooling And Documentation / Documentation.
• Implementation status: atlas-only.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.