Date: Tue, 23 Feb 2010 04:56:07 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r204241 - head/share/man/man4/man4.powerpc Message-ID: <201002230456.o1N4u7C2062927@svn.freebsd.org>
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Author: nwhitehorn Date: Tue Feb 23 04:56:06 2010 New Revision: 204241 URL: http://svn.freebsd.org/changeset/base/204241 Log: Add a manpage for smu(4) now that it does something useful. Added: head/share/man/man4/man4.powerpc/smu.4 (contents, props changed) Modified: head/share/man/man4/man4.powerpc/Makefile Modified: head/share/man/man4/man4.powerpc/Makefile ============================================================================== --- head/share/man/man4/man4.powerpc/Makefile Tue Feb 23 01:24:01 2010 (r204240) +++ head/share/man/man4/man4.powerpc/Makefile Tue Feb 23 04:56:06 2010 (r204241) @@ -7,6 +7,7 @@ MAN= adb.4 \ cuda.4 \ pmu.4 \ powermac_nvram.4 \ + smu.4 \ snd_ai2s.4 \ snd_davbus.4 \ tsec.4 Added: head/share/man/man4/man4.powerpc/smu.4 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/share/man/man4/man4.powerpc/smu.4 Tue Feb 23 04:56:06 2010 (r204241) @@ -0,0 +1,122 @@ +.\"- +.\" Copyright (c) 2010 Nathan Whitehorn <nwhitehorn@FreeBSD.org> +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, +.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +.\" POSSIBILITY OF SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd February 22, 2010 +.Dt SMU 4 +.Os +.Sh NAME +.Nm smu +.Nd Apple System Management Unit Driver +.Sh SYNOPSIS +To compile this driver into the kernel, +place the following lines in your +kernel configuration file: +.Bd -ragged -offset indent +.Cd "device smu" +.Ed +.Sh DESCRIPTION +The +.Nm +driver provides support for the System Management Unit (PMU) found in many +Apple G5 systems. +This includes most Power Macintosh G5 and all iMac G5 systems. +.Pp +The Apple SMU controller provides software power management and thermal +control functionality, and is responsible for managing system cooling +devices. +.Sh HARDWARE +Chips supported by the +.Nm +driver include: +.Pp +.Bl -bullet -compact +.It +Apple System Management Unit +.El +.Sh THERMAL MANAGEMENT +The +.Nm +driver provides basic automatic thermal management. Without a userspace +daemon providing more advanced control, the driver will attempt to maintain +system temperatures in a conservative range through coarse-grained control of +system cooling devices (see below). Automatic kernel-level thermal control +will take over if more than 3 seconds elapses between userspace cooling +setting adjustments. +.Sh SYSCTL VARIABLES +The +.Nm +driver provides power management services and thermal readout through a +sysctl interface. +The following sysctls can be used to control the +power management behavior and to examine current system power and +thermal conditions. +.Bl -tag -width indent +.It Va dev.smu.%d.target_temp +Target system temperature, in degrees Celsius. The +.Nm +driver will attempt to adjust fans to maintain the temperature of the +warmest component in the system at or below this level. +.It Va dev.smu.%d.critical_temp +System critical temperature, in degrees Celsius. If any component in +the system exceeds this temperature, the machine will be shut down within +500 ms. +.It Va dev.smu.%d.fans.%s.minrpm +Minimum allowed speed for this fan. +.It Va dev.smu.%d.fans.%s.maxrpm +Maximum allowed speed for this fan. +.It Va dev.smu.%d.fans.%s.rpm +Current speed for this fan. The fan speed can be adjusted by changing this +sysctl. If more than 3 seconds elapses between fan speed adjustments, the +kernel will resume automatic control of the fan. +.It Va dev.smu.%d.sensors.%s +Current reading from this sensor. Four sensor types are supported. Temperature +sensors are in units of degrees Celsius, current sensors in milliamps, voltage +sensors in millivolts, and power sensors in milliwatts. +.El +.Sh LED INTERFACE +The +.Nm +driver provides an +.Xr led 4 +annunciator interface at +.Pa /dev/led/sleepled . +.Sh SEE ALSO +.Xr acpi 4 , +.Xr pmu 4 , +.Xr led 4 +.Sh HISTORY +The +.Nm +device driver appeared in +.Fx 9.0 . +.Sh AUTHORS +.An -nosplit +The +.Nm +driver was written by +.An Nathan Whitehorn +.Aq nwhitehorn@FreeBSD.org .
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