NAME
ichlpcib
- Intel ICH LPC Interface Bridge
SYNOPSIS
ichlpcib* at pci? dev ? function ?
hpet0 at ichlpcib?
isa0 at ichlpcib?
DESCRIPTION
The
ichlpcib
driver supports the Intel ICH LPC Interface Bridges on compatible
chipsets. Supported functions include:
-
Watchdog timer.
The watchdog timer may be configured for a 2 seconds (on ICH6 or newer)
and 4 seconds (on ICH5 or older) min period and for a 39 seconds
(on ICH5 or older) or 613 seconds max period (on ICH6 or newer).
-
Power Management timer. A 24-bit timer available to be used by the
timecounters framework.
-
SpeedStep.
In some systems the SpeedStep function is also available, and can be
used to switch between high and low frequency (to reduce power consumption)
via the
machdep.speedstep_state
sysctl(8)
node. A value of 0 will use the low frequency (low power) and a 1 will
enable the high frequency (full power).
SEE ALSO
sysctl(8),
wdogctl(8)
HISTORY
The
ichlpcib
driver first appeared in
NetBSD3.0.
AUTHORS
The
ichlpcib
driver was written by
Minoura Makoto
and
Matthew R. Green
.