diff options
author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-12 07:21:23 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-12 09:42:54 -0300 |
commit | 910f4461d1af2e72919517d4df76fc12796c9f58 (patch) | |
tree | 275e6c67cca818c5defd9cd3f2fa7a682fb6e578 /Documentation/media/uapi/rc/lirc-set-rec-carrier.rst | |
parent | 5413b648d057103d58cf531e8e109b259b0abea0 (diff) |
[media] doc-rst: document LIRC set carrier ioctls
Put each ioctl on its own page and improve documentation, adding
cross-references for LIRC_SET_REC_CARRIER_RANGE and LIRC_SET_REC_CARRIER,
with can be used together to set a carrier frequency range.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media/uapi/rc/lirc-set-rec-carrier.rst')
-rw-r--r-- | Documentation/media/uapi/rc/lirc-set-rec-carrier.rst | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Documentation/media/uapi/rc/lirc-set-rec-carrier.rst b/Documentation/media/uapi/rc/lirc-set-rec-carrier.rst new file mode 100644 index 000000000000..17ddb4723caa --- /dev/null +++ b/Documentation/media/uapi/rc/lirc-set-rec-carrier.rst @@ -0,0 +1,48 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _lirc_set_rec_carrier: + +************************** +ioctl LIRC_SET_REC_CARRIER +************************** + +Name +==== + +LIRC_SET_REC_CARRIER - Set carrier used to modulate IR receive. + + +Synopsis +======== + +.. cpp:function:: int ioctl( int fd, int request, __u32 *frequency ) + +Arguments +========= + +``fd`` + File descriptor returned by open(). + +``request`` + LIRC_SET_REC_CARRIER + +``frequency`` + Frequency of the carrier that modulates PWM data, in Hz. + +Description +=========== + +Set receive carrier used to modulate IR PWM pulses and spaces. + +.. note:: + + If called together with :ref:`LIRC_SET_REC_CARRIER_RANGE`, this ioctl + sets the upper bound frequency that will be recognized by the device. + + +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. |