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-.\" Copyright (c) 1998, Nicolas Souchu
-.\" 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.
-.\"
-.\"
-.Dd August 10, 1998
-.Dt SMBBUS 4
-.Os FreeBSD
-.Sh NAME
-.Nm smbus
-.Nd
-System Management Bus
-.Sh SYNOPSIS
-.Cd "controller smbus"
-.Pp
-.Cd "device iicsmb0 at iicbus?"
-.Cd "device bktr0"
-.Sh DESCRIPTION
-The
-.Em smbus
-system provides a uniform, modular and architecture-independent
-system for the implementation of drivers to control various SMB devices
-and to utilize different SMB controllers (I2C, PIIX4, Brooktree848, vm86...).
-.Sh System Management Bus
-The
-.Em System Management Bus
-is a two-wire interface through which simple power-related chips can communicate
-with rest of the system. It uses I2C as its backbone (see
-.Xr iicbus 4 ).
-
-A system using SMB passes messages to and from devices instead of tripping
-individual control lines.
-
-With the SMBus, a device can provide manufacturer information, tell the
-system what its model/part number is, save its state for a suspend event,
-report different types of errors, accept control parameters, and return its
-status.
-
-The SMBus may share the same host device and physical bus as ACCESS bus
-components provided that an appropriate electrical bridge is provided
-between the internal SMB devices and external ACCESS bus devices.
-.Sh SEE ALSO
-.Xr iicbus 4 ,
-.Xr iicsmb 4 ,
-.Xr bktr 4 ,
-.Xr smb 4
-.Sh HISTORY
-The
-.Nm
-manual page first appeared in
-.Fx 3.0 .
-.Sh AUTHOR
-This
-manual page was written by
-.An Nicolas Souchu .