Add atrtc(4) manual page.

5 files changed, 61 insertions, 0 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index 3bb4e90..0310f0d9 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -50,6 +50,7 @@ MAN=	aac.4 \
 	atkbd.4 \
 	atkbdc.4 \
 	${_atp.4} \
+	${_atrtc.4} \
 	${_attimer.4} \
 	audit.4 \
 	auditpipe.4 \
@@ -645,6 +646,7 @@ _acpi_sony.4=	acpi_sony.4
 _acpi_toshiba.4=acpi_toshiba.4
 _acpi_wmi.4=	acpi_wmi.4
 _aesni.4=	aesni.4
+_atrtc.4=	atrtc.4
 _attimer.4=	attimer.4
 _aibs.4=	aibs.4
 _amdsbwd.4=	amdsbwd.4
diff --git a/share/man/man4/atrtc.4 b/share/man/man4/atrtc.4
new file mode 100644
index 0000000..35e770d
--- /dev/null
+++ b/share/man/man4/atrtc.4
@@ -0,0 +1,56 @@
+.\" Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd September 17, 2010
+.Dt atrtc 4
+.Os
+.Sh NAME
+.Nm atrtc
+.Nd AT Real-Time Clock (RTC) driver
+.Sh SYNOPSIS
+This driver is a mandatory part of i386/amd64 kernels.
+.Pp
+The following tunable is settable from the
+.Xr loader 8 :
+.Bl -ohang
+.It Va hint.atrtc. Ns Ar X Ns Va .clock
+controls event timers functionality support. Setting to 0, disables it.
+Default value is 1.
+.El
+.Sh DESCRIPTION
+This driver uses RTC hardware to supply kernel with time-of-day clock
+with 1 second resolution and one event timer.
+This hardware uses base frequency of 32768Hz for advancing time-of-day clock
+and generating periodic interrupts.
+Interrupts could be generated with fixed number of frequencies, from 2Hz to
+8192Hz, obtained by dividing base frequency by one of supported power-of-2
+divisors.
+.Pp
+Event timer provided by the driver is irrelevant to CPU power states.
+.Sh SEE ALSO
+.Xr attimer 4 ,
+.Xr hpet 4 ,
+.Xr eventtimers 7
diff --git a/share/man/man4/attimer.4 b/share/man/man4/attimer.4
index c5ca05b..b149a08 100644
--- a/share/man/man4/attimer.4
+++ b/share/man/man4/attimer.4
@@ -65,5 +65,6 @@ functionality is disabled.
 .Pp
 Event timer provided by the driver is irrelevant to CPU power states.
 .Sh SEE ALSO
+.Xr atrtc 4 ,
 .Xr hpet 4 ,
 .Xr eventtimers 7
diff --git a/share/man/man4/hpet.4 b/share/man/man4/hpet.4
index f6d324e..f787895 100644
--- a/share/man/man4/hpet.4
+++ b/share/man/man4/hpet.4
@@ -94,6 +94,7 @@ group is bound to specific CPU core. This is possible only when each
 of these comparators has own unsharable IRQ.
 .Sh SEE ALSO
 .Xr acpi 4 ,
+.Xr atrtc 4 ,
 .Xr attimer 4 ,
 .Xr eventtimers 7
 .Sh HISTORY
diff --git a/share/man/man7/eventtimers.7 b/share/man/man7/eventtimers.7
index 102ce45..6c9552a 100644
--- a/share/man/man7/eventtimers.7
+++ b/share/man/man7/eventtimers.7
@@ -129,4 +129,5 @@ always generating.
 .El
 .Sh SEE ALSO
 .Xr attimer 4 ,
+.Xr atrtc 4 ,
 .Xr hpet 4