Documentation/userspace-api/media/rc/lirc-set-wideband-receiver.rst

Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/rc/lirc-set-wideband-receiver.rst

File Facts

System: Linux kernel
Corpus path: Documentation/userspace-api/media/rc/lirc-set-wideband-receiver.rst
Extension: .rst
Size: 1510 bytes
Lines: 57
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_set_wideband_receiver:

********************************
ioctl LIRC_SET_WIDEBAND_RECEIVER
********************************

Name
====

LIRC_SET_WIDEBAND_RECEIVER - enable wide band receiver.

Synopsis
========

.. c:macro:: LIRC_SET_WIDEBAND_RECEIVER

``int ioctl(int fd, LIRC_SET_WIDEBAND_RECEIVER, __u32 *enable)``

Arguments
=========

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

``enable``
    enable = 1 means enable wideband receiver, enable = 0 means disable
    wideband receiver.

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

Some receivers are equipped with special wide band receiver which is
intended to be used to learn output of existing remote. This ioctl
allows enabling or disabling it.

This might be useful of receivers that have otherwise narrow band receiver
that prevents them to be used with some remotes. Wide band receiver might
also be more precise. On the other hand its disadvantage it usually
reduced range of reception.

.. note::

    Wide band receiver might be implicitly enabled if you enable
    carrier reports. In that case it will be disabled as soon as you disable
    carrier reports. Trying to disable wide band receiver while carrier
    reports are active will do nothing.

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.