March 28, 2008 ICHLPCIB 4

### 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
.