PIIXPM(4) FreeBSD 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, FCH (KERNCZ)
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
support was dropped in favor of acpitimer(4) and SMBus functionality was
added.
AUTHORS
The current piixpm driver was written by Alexander Yurchenko
<
[email protected]>.
BUGS
The driver doesn't support I2C commands with a data buffer size of more
than 2 bytes.
FreeBSD 14.1-RELEASE-p8 December 16, 2019 FreeBSD 14.1-RELEASE-p8