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PIIXPM(4)                BSD Kernel Interfaces Manual                PIIXPM(4)

NAME
     piixpm -- Intel PIIX SMBus controller

SYNOPSIS
     piixpm* at pci?
     iic* at piixpm?

DESCRIPTION
     The piixpm driver provides support for the Intel PIIX and compatible
     Power Management controller.  Only the SMBus host interface is supported
     and can be used with the iic(4) framework.

     Supported chipsets:

           o   AMD Hudson-2
           o   ATI SB200, SB300, SB400, SB600, SB700, SB800
           o   Intel 82371AB (PIIX4), 82440MX
           o   ServerWorks OSB4, CSB5, CSB6, HT-1000, HT-1100
           o   SMSC Victory66

SEE ALSO
     iic(4), intro(4), pci(4)

HISTORY
     The piixpm driver first appeared in OpenBSD 3.7 to provide support for
     the power management (ACPI) timer.  In OpenBSD 3.9, power management sup-
     port was dropped in favor of acpitimer(4) and SMBus functionality was
     added.

AUTHORS
     The current piixpm driver was written by Alexander Yurchenko
     <grange@openbsd.org>.

BUGS
     The driver doesn't support I2C commands with a data buffer size of more
     than 2 bytes.

BSD                              May 25, 2017                              BSD