OpenBSD-4.6/share/man/man4/piixpm.4

.\"	$OpenBSD: piixpm.4,v 1.17 2009/06/24 13:49:49 deraadt Exp $
.\"
.\" Copyright (c) 2004, 2005 Alexander Yurchenko <grange@openbsd.org>
.\"
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.Dd $Mdocdate: June 24 2009 $
.Dt PIIXPM 4
.Os
.Sh NAME
.Nm piixpm
.Nd Intel PIIX SMBus controller
.Sh SYNOPSIS
.Cd "piixpm* at pci?"
.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, CSB5, CSB6, HT-1000, HT-1100
.It
SMSC Victory66
.El
.Sh SEE ALSO
.Xr iic 4 ,
.Xr intro 4 ,
.Xr pci 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 3.7
to provide support for the power management (ACPI) timer.
In
.Ox 3.9 ,
power management support was dropped in favor of
.Xr acpitimer 4
and SMBus functionality was added.
.Sh AUTHORS
.An -nosplit
The current
.Nm
driver was written by
.An Alexander Yurchenko Aq grange@openbsd.org .
.Sh BUGS
The driver doesn't support I2C commands with a data buffer size of more
than 2 bytes.