Intel ICHx/ICHx-M LPC
ichpcib* at pci?
isa* at ichpcib?
ichpcib driver supports Intel ICH,
ICH0, ICH2, ICH2-M, ICH3-S, ICH3-M, ICH4, ICH4-M, ICH5, ICH6, ICH7, ICH7-M,
ICH8, ICH8-M, ICH9, 6300ESB and 6321ESB LPC bridges. These devices are
mostly usual PCI-ISA bridges but with some additional power management and
monitoring capabilities. Besides the core functionality, the
ichpcib driver provides support for the Intel
SpeedStep technology, available for the ICH2-M, ICH3-M, and ICH4-M chipsets,
and power management timer available for all chipsets. It allows the user to
control CPU frequency with the
cpu(4), intro(4), isa(4), pci(4), sysctl(8)
Intel SpeedStep support for the ICHx-M chipsets first appeared in
OpenBSD 3.5 as part of the
ichpcib driver first appeared in
ichpcib driver was written by
On some old machines with the ICH2-M chipset, Intel SpeedStep isn't available.