91 lines
3.4 KiB
Groff
91 lines
3.4 KiB
Groff
.\" $NetBSD: pmu.4,v 1.3 2009/03/09 19:24:28 joerg Exp $
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.\"
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.\" Copyright (c) 2007
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.\" Michael Lorenz. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd May 14, 2007
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.Dt PMU 4
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.Os
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.Sh NAME
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.Nm pmu
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.Nd support for Power Management Units found in all Apple laptops and some
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desktop Power Macintosh computers
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.Sh SYNOPSIS
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.Cd "pmu* at obio?"
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.Cd "nadb* at pmu?"
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.Cd "battery* at pmu?"
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.Cd "smartbat* at pmu?"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the Power Management Unit found in
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Apple laptops and some desktop Power Macintosh computers.
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Functions controlled by the PMU include the real time clock, ADB,
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power, batteries, on some laptops like the PowerBook 3400c and
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similar machines it also controls hotkeys and display brightness,
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on others it provides an
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.Xr iic 9
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bus and on some it controls CPU speed.
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On many older machines it also provides access to some non-volatile
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memory and thermal sensors.
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Not all those features are present on all machines, for instance
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Power Macintosh G4 and later machines don't have ADB, many more
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recent laptops have display brightness and backlight control built
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into the graphics controller instead of the PMU, only a few older
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PowerBooks use the PMU for CPU speed control and newer machines
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use a different way to access non-volatile memory.
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However, all known PMUs so far provide a real time clock and power
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control.
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.Ss Notes by model
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Real time clock and power control are present and supported on all
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machines that can run
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.Nx Ns Tn /macppc ,
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ADB is supported when present.
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.Bl -tag
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.It Dv PowerBook 2400, 3400c, and 3500
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Battery status and thermal sensors found on the mainboard and in
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the battery pack are supported by the
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.Xr battery 4
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driver, values can be read via
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.Xr envsys 4 .
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Hotkeys for brightness control are supported, CPU speed control
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and parameter RAM are present but unsupported.
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.It Dv Power Macintosh G4
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ADB is not present,
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.Xr iic 9
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is present but unsupported.
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.El
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.Sh SEE ALSO
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.Xr battery 4 ,
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.Xr cuda 4 ,
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.Xr nadb 4 ,
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.Xr nvram 4 ,
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.Xr obio 4 ,
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.Xr iic 9
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.\" .Xr smartbat 4
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.Sh BUGS
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Some features are currently unsupported, like the
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.Xr iic 9
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bus, access to parameter RAM and CPU speed control.
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