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), hpet(4), x86/est(4), x86/fwhrng(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 7.0                       April 4, 2015                      NetBSD 7.0

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