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:
- AMD Hudson-2, FCH (KERNCZ)
- ATI SB200, SB300, SB400, SB600, SB700, SB800
- Intel 82371AB (PIIX4), 82440MX
- ServerWorks OSB4, CSB5, CSB6, HT-1000, HT-1100
- SMSC Victory66
SEE ALSO
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 support 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.