From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../media/rc/lirc-set-send-duty-cycle.rst | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst (limited to 'Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst') diff --git a/Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst b/Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst new file mode 100644 index 000000000..52a072529 --- /dev/null +++ b/Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst @@ -0,0 +1,47 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: RC + +.. _lirc_set_send_duty_cycle: + +****************************** +ioctl LIRC_SET_SEND_DUTY_CYCLE +****************************** + +Name +==== + +LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for +IR transmit. + +Synopsis +======== + +.. c:macro:: LIRC_SET_SEND_DUTY_CYCLE + +``int ioctl(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)`` + +Arguments +========= + +``fd`` + File descriptor returned by open(). + +``duty_cycle`` + Duty cicle, describing the pulse width in percent (from 1 to 99) of + the total cycle. Values 0 and 100 are reserved. + +Description +=========== + +Get/set the duty cycle of the carrier signal for IR transmit. + +Currently, no special meaning is defined for 0 or 100, but this +could be used to switch off carrier generation in the future, so +these values should be reserved. + +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 ` chapter. -- cgit v1.2.3