ichlpcib(4)
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ICHLPCIB(4) NetBSD/x86 Kernel Interfaces Manual 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 com-
patible 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,
http://www.intel.com/assets/pdf/datasheet/301473.pdf, January, 2005.
Intel Corporation, Intel I/O Controller Hub 7 (ICH7) Family,
http://www.intel.com/Assets/PDF/datasheet/307013.pdf, April, 2007.
Intel Corporation, Intel I/O Controller Hub 8 (ICH8) Family,
http://www.intel.com/assets/pdf/datasheet/313056.pdf, May, 2007.
Intel Corporation, Using the Intel ICH Family Watchdog Timer (WDT),
ftp://download.intel.com/design/chipsets/applnots/29227301.pdf,
September, 2002.
HISTORY
The ichlpcib driver first appeared in NetBSD 3.0.
AUTHORS
The ichlpcib driver was written by Minoura Makoto and
Matthew R. Green.
NetBSD 7.1_STABLE March 18, 2011 NetBSD 7.1_STABLE
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