Intel PIIX SMBus controller
piixpm* at pci?
iic* at piixpm?
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
- 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
iic(4), intro(4), pci(4)
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.
piixpm driver was written by
The driver doesn't support I2C commands with a data buffer size of more than 2 bytes.