1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/userspace-api/media/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _lirc_set_rec_carrier_range:
11
12********************************
13ioctl LIRC_SET_REC_CARRIER_RANGE
14********************************
15
16Name
17====
18
19LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate
20IR receive.
21
22Synopsis
23========
24
25.. c:function:: int ioctl( int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency )
26    :name: LIRC_SET_REC_CARRIER_RANGE
27
28Arguments
29=========
30
31``fd``
32    File descriptor returned by open().
33
34``frequency``
35    Frequency of the carrier that modulates PWM data, in Hz.
36
37Description
38===========
39
40This ioctl sets the upper range of carrier frequency that will be recognized
41by the IR receiver.
42
43.. note::
44
45   To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE
46   <LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call
47   :ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound.
48
49Return Value
50============
51
52On success 0 is returned, on error -1 and the ``errno`` variable is set
53appropriately. The generic error codes are described at the
54:ref:`Generic Error Codes <gen-errors>` chapter.
55