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?
tco* 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 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-
tion.
· 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
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),
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 9.4_STABLE February 17, 2017 NetBSD 9.4_STABLE
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