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+.\" $NetBSD: s390rtc.4,v 1.1 2011/04/05 11:24:46 phx Exp $
+.\"
+.\" Copyright (c) 2011 The NetBSD Foundation, Inc.
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd April 5, 2011
+.Dt S390RTC 4
+.Os
+.Sh NAME
+.Nm s390rtc
+.Nd Seiko Instruments S-35390 real-time clock
+.Sh SYNOPSIS
+.Cd "s390rtc* at iic? addr 0x30"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the
+.Tn Seiko Instruments
+S-xx390 real-time clock chip.
+.Pp
+Access methods to retrieve and set date and time
+are provided through the
+.Em TODR
+interface defined in
+.Xr todr 9 .
+.Sh SEE ALSO
+.Xr iic 4 ,
+.Xr todr 9
+.Sh HISTORY
+The
+.Nm
+device appeared in
+.Nx 6.0 .
+.Sh BUGS
+The driver does not support the chip's alarm features.