priority of some of the drivers that manage the same state (e.g. ichss0
vs est0). Specifically, powernow, est, and p4tcc are added at order 10,
ichss at order 20, and smist at order 30. Previously, some laptops were
seeing both ichss0 and est0 attaching and stomping on each other.
XXX: This isn't quite ideal, but works with the existing hacks, I think
what we really want instead is a single "speedstep0" device for CPUs
that the ichss, est, and smist drivers probe (but with differing
priorities).
MFC after: 1 week
o remove errata_a0 and introduce the corresponding flags into 'errata'.
o introduce a new errata for K8, namely some platform might set the
PENDING_BIT but aren't able to unset it, also don't loop forever
waiting PENDING_BIT being cleared.
o try to introduce a workaround for the PENDING_BIT stuck problem,
o support now half multipliers for K8.
Tested by: Abdullah Al-Marrie
Approved by: njl
checks, including cpuid_is_k7(), will catch CPUs that really don't support
this method.
Submitted by: Bruno Ducrot
Tested by: Jari Kirma (kirma cs.hut.fi)
and AMD Cool&Quiet PowerNow! (k8) cpufreq control. This driver is enabled
for both i386 and amd64 architectures. It has both acpi and legacy BIOS
attachments. Thanks to Bruno Ducrot for writing this driver and Jung-uk
Kim for testing.
Submitted by: Bruno Ducrot (ducrot:poupinou.org)
