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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst')
-rw-r--r-- | Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst b/Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst new file mode 100644 index 000000000..530bc2239 --- /dev/null +++ b/Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst @@ -0,0 +1,49 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: RC + +.. _lirc_set_rec_carrier_range: + +******************************** +ioctl LIRC_SET_REC_CARRIER_RANGE +******************************** + +Name +==== + +LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate +IR receive. + +Synopsis +======== + +.. c:macro:: LIRC_SET_REC_CARRIER_RANGE + +``int ioctl(int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency)`` + +Arguments +========= + +``fd`` + File descriptor returned by open(). + +``frequency`` + Frequency of the carrier that modulates PWM data, in Hz. + +Description +=========== + +This ioctl sets the upper range of carrier frequency that will be recognized +by the IR receiver. + +.. note:: + + To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE + <LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call + :ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound. + +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. |