lirc.4: Document remaining ioctl (LIRC_GET_REC_TIMEOUT)

Now all ioctls are documented.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man4/lirc.4

@@ -132,11 +132,6 @@ The protocol or scancode is invalid, or the
 device cannot transmit.
 .SH IOCTL COMMANDS
 .PP
-The complete list of ioctl commands is maintained in the kernel
-documentation, see SEE ALSO.
-The ioctl commands presented here is a subset of the kernel
-documentation.
-.PP
 The LIRC device's ioctl definition is bound by the ioctl function
 definition of struct file_operations, leaving us with an unsigned
 int for the ioctl command and an unsigned long for the argument.
@@ -155,12 +150,6 @@ Many require a third argument, usually an
 .IR int .
 referred to below as
 .IR val .
-.PP
-In general, each driver should have a default set of settings.
-The driver implementation is expected to re-apply the default settings
-when the device is closed by user space, so that every application
-opening the device can rely on working with the default settings
-initially.
 .\"
 .SS Always Supported Commands
 .PP
@@ -284,6 +273,10 @@ If the exact value cannot be set, then the next possible value
 .I greater
 than the given value should be set.
 .TP
+.BR LIRC_GET_REC_TIMEOUT " (\fivoid\fP)"
+Return the current inactivity timeout (microseconds).
+Available in kernel release 4.18 and later.
+.TP
 .BR LIRC_SET_REC_TIMEOUT_REPORTS " (\fIint\fP)"
 Enable
 .RI ( val
@@ -334,7 +327,7 @@ By default this should be turned off.
 .BR LIRC_GET_REC_RESOLUTION " (\fIvoid\fP)"
 Return the driver resolution (microseconds).
 .TP
-.BR LIRC_SET_TRANSMITTER_MASK
+.BR LIRC_SET_TRANSMITTER_MASK " (\fIint\fP)"
 Enable the set of transmitters specified in
 .IR val ,
 which contains a bit mask where each enabled transmitter is a 1.