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Diffstat (limited to 'Documentation/media/uapi/rc/lirc-set-rec-carrier.rst')
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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 000000000..17ddb4723 --- /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. |