ICHLPCIB(4) |
Kernel Interfaces Manual (x86) |
ICHLPCIB(4) |
NAME
ichlpcib — Intel ICH LPC Interface Bridge
SYNOPSIS
ichlpcib* at pci? dev ? function ?
fwhrng* at ichlpcib?
hpet0 at ichlpcib?
isa0 at ichlpcib?
gpio* 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 older 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).
-
General Purpose Input/Output. The ICH provides up to 64 I/O pins which can be accessed through the gpio(4) framework.
SEE ALSO
est(4),
fwhrng(4),
gpio(4),
hpet(4),
ioapic(4),
sysctl(8),
wdogctl(8)
Intel Corporation, Intel I/O Controller Hub 6 (ICH6) Family, January, 2005, http://www.intel.com/assets/pdf/datasheet/301473.pdf.
Intel Corporation, Intel I/O Controller Hub 7 (ICH7) Family, April, 2007, http://www.intel.com/Assets/PDF/datasheet/307013.pdf.
Intel Corporation, Intel I/O Controller Hub 8 (ICH8) Family, May, 2007, http://www.intel.com/assets/pdf/datasheet/313056.pdf.
Intel Corporation, Using the Intel ICH Family Watchdog Timer (WDT), September, 2002, ftp://download.intel.com/design/chipsets/applnots/29227301.pdf.
HISTORY
The ichlpcib driver first appeared in NetBSD 3.0.
AUTHORS
The ichlpcib driver was written by Minoura Makoto and Matthew R. Green.