81 lines
3.4 KiB
Groff
81 lines
3.4 KiB
Groff
.\" $NetBSD: pmu.4,v 1.1 2007/05/15 14:12:09 macallan 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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.Os
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.Dt PMU 4
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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 Apple laptops
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and some desktop Power Macintosh computers. Functions controlled by the PMU
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include the real time clock, ADB, power, batteries, on some laptops like the
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PowerBook 3400c and similar machines it also controls hotkeys and display brightness, on others it provides an
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.Xr iic 4 bus and on some it controls CPU speed. On many older machines it also provides access to some non-volatile memory and thermal sensors. Not all those
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features are present on all machines, for instance Power Macintosh G4 and later
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machines don't have ADB, many more recent laptops have display brightness and
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backlight control built into the graphics controller instead of the PMU, only a
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few older PowerBooks use the PMU for CPU speed control and newer machines use a
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different way to access non-volatile memory. However, all known PMUs so far
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provide a real time clock and power control.
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.Sh Notes by model
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Real time clock and power control are present and supported on all machines
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that can run NetBSD/macppc, 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 the battery
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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 . Hotkeys for brightness control are supported, CPU speed control 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 4
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is present but unsupported.
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.El
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.Sh BUGS
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Some features are currently unsupported, like the
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.Xr iic 4
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bus, access to parameter RAM and CPU speed control.
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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 iic 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 pmu 4 ,
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.Xr smartbat 4
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