PMU(4) | Device Drivers Manual | PMU(4) |
pmu
— support for
Power Management Units found in all Apple laptops and some desktop Power
Macintosh computers
pmu* at obio?
nadb* at pmu?
battery* at pmu?
smartbat* at pmu?
The pmu
driver provides support for the
Power Management Unit found in Apple laptops and some desktop Power
Macintosh computers. Functions controlled by the PMU include the real time
clock, ADB, power, batteries, on some laptops like the PowerBook 3400c and
similar machines it also controls hotkeys and display brightness, on others
it provides an iic(9) 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 features are
present on all machines, for instance Power Macintosh G4 and later machines
don't have ADB, many more recent laptops have display brightness and
backlight control built into the graphics controller instead of the PMU,
only a few older PowerBooks use the PMU for CPU speed control and newer
machines use a different way to access non-volatile memory. However, all
known PMUs so far provide a real time clock and power control.
Real time clock and power control are present and supported on all machines that can run NetBSD/macppc, ADB is supported when present.
PowerBook
2400, 3400c, and 3500
Power
Macintosh G4
Some features are currently unsupported, like the iic(9) bus, access to parameter RAM and CPU speed control.
May 14, 2007 | NetBSD 10.99 |