1.\" $NetBSD: pmu.4,v 1.3 2009/03/09 19:24:28 joerg Exp $ 2.\" 3.\" Copyright (c) 2007 4.\" Michael Lorenz. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.Dd May 14, 2007 28.Dt PMU 4 29.Os 30.Sh NAME 31.Nm pmu 32.Nd support for Power Management Units found in all Apple laptops and some 33desktop Power Macintosh computers 34.Sh SYNOPSIS 35.Cd "pmu* at obio?" 36.Cd "nadb* at pmu?" 37.Cd "battery* at pmu?" 38.Cd "smartbat* at pmu?" 39.Sh DESCRIPTION 40The 41.Nm 42driver provides support for the Power Management Unit found in 43Apple laptops and some desktop Power Macintosh computers. 44Functions controlled by the PMU include the real time clock, ADB, 45power, batteries, on some laptops like the PowerBook 3400c and 46similar machines it also controls hotkeys and display brightness, 47on others it provides an 48.Xr iic 9 49bus and on some it controls CPU speed. 50On many older machines it also provides access to some non-volatile 51memory and thermal sensors. 52Not all those features are present on all machines, for instance 53Power Macintosh G4 and later machines don't have ADB, many more 54recent laptops have display brightness and backlight control built 55into the graphics controller instead of the PMU, only a few older 56PowerBooks use the PMU for CPU speed control and newer machines 57use a different way to access non-volatile memory. 58However, all known PMUs so far provide a real time clock and power 59control. 60.Ss Notes by model 61Real time clock and power control are present and supported on all 62machines that can run 63.Nx Ns Tn /macppc , 64ADB is supported when present. 65.Bl -tag 66.It Dv PowerBook 2400, 3400c, and 3500 67Battery status and thermal sensors found on the mainboard and in 68the battery pack are supported by the 69.Xr battery 4 70driver, values can be read via 71.Xr envsys 4 . 72Hotkeys for brightness control are supported, CPU speed control 73and parameter RAM are present but unsupported. 74.It Dv Power Macintosh G4 75ADB is not present, 76.Xr iic 9 77is present but unsupported. 78.El 79.Sh SEE ALSO 80.Xr battery 4 , 81.Xr cuda 4 , 82.Xr nadb 4 , 83.Xr nvram 4 , 84.Xr obio 4 , 85.Xr iic 9 86.\" .Xr smartbat 4 87.Sh BUGS 88Some features are currently unsupported, like the 89.Xr iic 9 90bus, access to parameter RAM and CPU speed control. 91