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+.\" $NetBSD: piixpm.4,v 1.8 2020/01/14 15:43:19 msaitoh Exp $
+.\" $OpenBSD: piixpm.4,v 1.9 2006/01/18 03:06:33 brad Exp $
+.\"
+.\" Copyright (c) 2004, 2005 Alexander Yurchenko <grange@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd January 14, 2020
+.Dt PIIXPM 4
+.Os
+.Sh NAME
+.Nm piixpm
+.Nd Intel PIIX and compatible Power Management controller
+.Sh SYNOPSIS
+.Cd "piixpm* at pci? dev ? function ?"
+.Cd "iic* at piixpm?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the Intel PIIX and compatible Power Management
+controller.
+Only the SMBus host interface is supported and can be used with the
+.Xr iic 4
+framework.
+.Pp
+Supported chipsets:
+.Pp
+.Bl -bullet -compact -offset indent
+.It
+ATI SB200, SB300, SB400, SB600, SB700, SB800
+.It
+Intel 82371AB (PIIX4), 82440MX
+.It
+Serverworks OSB4, OSB5, OSB6, HT1000SB
+.It
+AMD FCHs (HUDSON, BOLTON and KERNCZ)
+.El
+.Sh SEE ALSO
+.Xr iic 4 ,
+.Xr intro 4 ,
+.Xr pci 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 3.9
+and then in
+.Nx 4.0 .
+.Sh AUTHORS
+.An -nosplit
+The current
+.Nm
+driver was written by
+.An Alexander Yurchenko Aq Mt grange@openbsd.org .
+It was ported to
+.Nx
+by
+.An Jared D. McNeill Aq Mt jmcneill@netbsd.org .
+.Sh BUGS
+The driver doesn't support I2C commands with a data buffer size of more
+than 2 bytes.