Add proper documentation for this ioctl, providing some
additional information about its usage.
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
---
.../media/uapi/rc/lirc-set-transmitter-mask.rst | 53 ++++++++++++++++++++++
.../media/uapi/rc/lirc_device_interface.rst | 1 +
Documentation/media/uapi/rc/lirc_ioctl.rst | 10 ----
3 files changed, 54 insertions(+), 10 deletions(-)
create mode 100644 Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst
diff --git a/Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst
b/Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst
new file mode 100644
index 000000000000..2b35e21b9bb9
--- /dev/null
+++ b/Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst
@@ -0,0 +1,53 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _lirc_set_transmitter_mask:
+
+*******************************
+ioctl LIRC_SET_TRANSMITTER_MASK
+*******************************
+
+Name
+====
+
+LIRC_SET_TRANSMITTER_MASK - Enables send codes on a given set of transmitters
+
+Synopsis
+========
+
+.. cpp:function:: int ioctl( int fd, int request, __u32 *mask )
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by open().
+
+``request``
+ LIRC_SET_TRANSMITTER_MASK
+
+``mask``
+ Mask with channels to enable tx. Channel 0 is the least significant bit.
+
+
+Description
+===========
+
+Some IR TX devices have multiple output channels, in such case,
+:ref:`LIRC_CAN_SET_TRANSMITTER_MASK <LIRC-CAN-SET-TRANSMITTER-MASK>` is
+returned via :ref:`LIRC_GET_FEATURES` and this ioctl sets what channels will
+send IR codes.
+
+This ioctl enables the given set of transmitters. The first transmitter is
+encoded by the least significant bit and so on.
+
+When an invalid bit mask is given, i.e. a bit is set, even though the device
+does not have so many transitters, then this ioctl returns the number of
+available transitters and does nothing otherwise.
+
+
+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.
diff --git a/Documentation/media/uapi/rc/lirc_device_interface.rst
b/Documentation/media/uapi/rc/lirc_device_interface.rst
index 06257caa82db..96765eccaa69 100644
--- a/Documentation/media/uapi/rc/lirc_device_interface.rst
+++ b/Documentation/media/uapi/rc/lirc_device_interface.rst
@@ -22,4 +22,5 @@ LIRC Device Interface
lirc-set-rec-carrier
lirc-set-rec-carrier-range
lirc-set-send-carrier
+ lirc-set-transmitter-mask
lirc_ioctl
diff --git a/Documentation/media/uapi/rc/lirc_ioctl.rst
b/Documentation/media/uapi/rc/lirc_ioctl.rst
index b1cca1465997..86bd70dba290 100644
--- a/Documentation/media/uapi/rc/lirc_ioctl.rst
+++ b/Documentation/media/uapi/rc/lirc_ioctl.rst
@@ -54,16 +54,6 @@ device can rely on working with the default settings
initially.
Set send/receive mode. Largely obsolete for send, as only
``LIRC_MODE_PULSE`` is supported.
-.. _LIRC_SET_TRANSMITTER_MASK:
-
-``LIRC_SET_TRANSMITTER_MASK``
-
- This enables the given set of transmitters. The first transmitter is
- encoded by the least significant bit, etc. When an invalid bit mask
- is given, i.e. a bit is set, even though the device does not have so
- many transitters, then this ioctl returns the number of available
- transitters and does nothing otherwise.
-
.. _LIRC_SET_REC_TIMEOUT:
``LIRC_SET_REC_TIMEOUT``
--
2.7.4
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