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PMU(4) FreeBSD Kernel Interfaces Manual PMU(4) NAME pmu - Apple PMU99 Power Management Driver SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: device adb device pmu DESCRIPTION The pmu driver provides support for the Power Management Unit (PMU) found in Apple Core99 hardware. This includes late G3 laptops, all G4 machines, early G5 desktops and all G5 XServes. The Apple PMU controller is a multi-purpose ASIC that provides power management and thermal control, as well as an ADB bus for the internal keyboard and mouse on laptops. HARDWARE Chips supported by the pmu driver include: o Apple KeyLargo PMU o Apple K2-KeyLargo PMU SYSCTL VARIABLES The pmu driver provides power management services in addition to an adb(4) interface. The following sysctls can be used to control the power management behavior and to examine current system power and thermal conditions. dev.pmu.%d.server_mode Restart after power failure behavior (1 causes system to reboot after power cut, 0 causes system to remain off). dev.pmu.%d.batteries.%d.present Indicates whether the relevant battery is inserted. dev.pmu.%d.batteries.%d.charging Indicates whether the battery is currently charging. dev.pmu.%d.batteries.%d.charge The current battery charge, in milliamp hours. dev.pmu.%d.batteries.%d.maxcharge The battery's self-reported maximum charge, in milliamp hours. dev.pmu.%d.batteries.%d.rate The current into the battery, in milliamps. While the battery is discharging, this will be negative. dev.pmu.%d.batteries.%d.voltage Battery voltage, in millivolts. dev.pmu.%d.batteries.%d.time Estimated time until full battery charge (or discharge), in minutes. HISTORY The pmu device driver appeared in NetBSD 4.0, and then in FreeBSD 8.0. AUTHORS The pmu driver was written by Michael Lorenz <macallan@NetBSD.org> and ported to FreeBSD by Nathan Whitehorn <nwhitehorn@FreeBSD.org>. FreeBSD 14.0-RELEASE-p11 December 6, 2008 FreeBSD 14.0-RELEASE-p11