1.\" $OpenBSD: piixpm.4,v 1.16 2008/09/17 06:26:13 brad Exp $ 2.\" 3.\" Copyright (c) 2004, 2005 Alexander Yurchenko <grange@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: September 17 2008 $ 18.Dt PIIXPM 4 19.Os 20.Sh NAME 21.Nm piixpm 22.Nd Intel PIIX SMBus controller 23.Sh SYNOPSIS 24.Cd "piixpm* at pci?" 25.Cd "iic* at piixpm?" 26.Sh DESCRIPTION 27The 28.Nm 29driver provides support for the Intel PIIX and compatible Power Management 30controller. 31Only the SMBus host interface is supported and can be used with the 32.Xr iic 4 33framework. 34.Pp 35Supported chipsets: 36.Pp 37.Bl -bullet -compact -offset indent 38.It 39ATI SB200, SB300, SB400, SB600, SB700, SB800 40.It 41Intel 82371AB (PIIX4), 82440MX 42.It 43ServerWorks OSB4, CSB5, CSB6, HT-1000 44.It 45SMSC Victory66 46.El 47.Sh SEE ALSO 48.Xr iic 4 , 49.Xr intro 4 , 50.Xr pci 4 51.Sh HISTORY 52The 53.Nm 54driver first appeared in 55.Ox 3.7 56to provide support for the power management (ACPI) timer. 57In 58.Ox 3.9 , 59power management support was dropped in favor of 60.Xr acpitimer 4 61and SMBus functionality was added. 62.Sh AUTHORS 63.An -nosplit 64The current 65.Nm 66driver was written by 67.An Alexander Yurchenko Aq grange@openbsd.org . 68.Sh BUGS 69The driver doesn't support I2C commands with a data buffer size of more 70than 2 bytes. 71