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ICHLPCIB(4) NetBSD/x86 Kernel Interfaces Manual ICHLPCIB(4)
Powered by man-cgi (2021-06-01).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
ichlpcib -- Intel ICH LPC Interface Bridge
ichlpcib* at pci? dev ? function ?
fwhrng* at ichlpcib?
hpet0 at ichlpcib?
isa0 at ichlpcib?
gpio* at ichlpcib?
tco* at ichlpcib?
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 1 seconds
(on ICH6 or newer) and 2 seconds (on ICH5 or older) min period and
for a 23 seconds (on ICH5 or older) or 367 seconds max period (on
ICH6 or newer).
Prior to NetBSD 8.0, the x86/tco(4) watchdog timer was included as
part of the ichlpcib driver, and did not require explicit configura-
· Power Management timer. A 24-bit timer available to be used by the
· 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.
gpio(4), x86/est(4), x86/fwhrng(4), x86/hpet(4), x86/ioapic(4),
x86/tco(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),
The ichlpcib driver first appeared in NetBSD 3.0.
The ichlpcib driver was written by Minoura Makoto and
Matthew R. Green.
NetBSD 9.2 February 17, 2017 NetBSD 9.2