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1.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later2.. c:namespace:: RC3 4.. _lirc_set_rec_carrier:5 6**************************7ioctl LIRC_SET_REC_CARRIER8**************************9 10Name11====12 13LIRC_SET_REC_CARRIER - Set carrier used to modulate IR receive.14 15Synopsis16========17 18.. c:macro:: LIRC_SET_REC_CARRIER19 20``int ioctl(int fd, LIRC_SET_REC_CARRIER, __u32 *frequency)``21 22Arguments23=========24 25``fd``26 File descriptor returned by open().27 28``frequency``29 Frequency of the carrier that modulates PWM data, in Hz.30 31Description32===========33 34Set receive carrier used to modulate IR PWM pulses and spaces.35 36.. note::37 38 If called together with :ref:`LIRC_SET_REC_CARRIER_RANGE`, this ioctl39 sets the upper bound frequency that will be recognized by the device.40 41Return Value42============43 44On success 0 is returned, on error -1 and the ``errno`` variable is set45appropriately. The generic error codes are described at the46:ref:`Generic Error Codes <gen-errors>` chapter.47