1.\" $OpenBSD: piixpm.4,v 1.20 2019/12/16 21:46:44 claudio 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: December 16 2019 $ 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 39AMD Hudson-2, FCH (KERNCZ) 40.It 41ATI SB200, SB300, SB400, SB600, SB700, SB800 42.It 43Intel 82371AB (PIIX4), 82440MX 44.It 45ServerWorks OSB4, CSB5, CSB6, HT-1000, HT-1100 46.It 47SMSC Victory66 48.El 49.Sh SEE ALSO 50.Xr iic 4 , 51.Xr intro 4 , 52.Xr pci 4 53.Sh HISTORY 54The 55.Nm 56driver first appeared in 57.Ox 3.7 58to provide support for the power management (ACPI) timer. 59In 60.Ox 3.9 , 61power management support was dropped in favor of 62.Xr acpitimer 4 63and SMBus functionality was added. 64.Sh AUTHORS 65.An -nosplit 66The current 67.Nm 68driver was written by 69.An Alexander Yurchenko Aq Mt grange@openbsd.org . 70.Sh BUGS 71The driver doesn't support I2C commands with a data buffer size of more 72than 2 bytes. 73