ichlpcib(4) - NetBSD Manual Pages

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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 7.1.2                    March 18, 2011                    NetBSD 7.1.2