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

.\"	$OpenBSD: acpi.4,v 1.35 2009/06/29 20:21:43 jmc Exp $
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.\" Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
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.Dd $Mdocdate: June 29 2009 $
.Dt ACPI 4
.Os
.Sh NAME
.Nm acpi
.Nd Advanced Configuration and Power Interface
.Sh SYNOPSIS
.Cd "acpi0 at bios?"
.Sh DESCRIPTION
The
.Nm
driver provides basic support for ACPI including loading ACPI tables from
the firmware, parsing and interpreting AML code, event handling,
suspending and powering off, and attaching device drivers.
Userland may access
.Nm
by using the
.Xr apm 4
device.
.Pp
The following devices can attach to
.Nm :
.Pp
.Bl -tag -width "acpithinkpad(4)XXX" -offset indent -compact
.It Xr acpiac 4
ACPI AC adapter
.It Xr acpiasus 4
ASUS ACPI hotkeys
.It Xr acpibat 4
ACPI control method battery
.It Xr acpibtn 4
ACPI button
.It Xr acpicpu 4
ACPI processor power and performance state
.It Xr acpidock 4
ACPI docking station
.It Xr acpiec 4
ACPI embedded controller
.It Xr acpihpet 4
ACPI high precision event timer
.It Xr acpimadt 4
ACPI APIC configuration
.It Xr acpiprt 4
ACPI PCI routing table configuration
.It Xr acpipwrres 4
ACPI power resources
.It Xr acpithinkpad 4
IBM/Lenovo ThinkPad ACPI support
.It Xr acpitimer 4
ACPI power management timer
.It Xr acpitz 4
ACPI thermal zone
.It Xr acpivideo 4
ACPI video
.It Xr acpivout 4
ACPI video output
.El
.Sh FILES
.Bl -tag -width "/dev/apmctlXXX"
.It /dev/apm
Power management data device.
May only be opened read-only.
May be opened by multiple concurrent users.
.It /dev/apmctl
Power management control device.
May be opened read-write or write-only.
May only be opened by one user at a time.
An attempt to open the file when in use will fail, returning
.Er EBUSY .
.El
.Sh SEE ALSO
.Xr apm 4 ,
.Xr intro 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 3.8 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Thorsten Lockert Aq tholo@sigmasoft.com
and
.An Jordan Hargrave Aq jordan@openbsd.org .