ACPI: cpufreq, processor: Detect old BIOS, not supporting CPU freq on a recent CPU.

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On Intel CPUs it is rather common and a good hint that BIOSes which do provide
_PPC func, but not the frequencies itself in _PSS function, are old and need
to be updated for CPU freq support.

Tell the user/vendor he has a BIOS/firmware problem.
Make use of FW_BUG interface to give vendors and users the ability to
automatically check with (or let linuxfirmwarekit do that):
dmesg |grep "Firmware Bug"

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

...

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Thomas Renninger 2008-09-01 14:27:04 +02:00 • committed by Len Brown

parent a0ad05c75a

commit 910dfae298

1 changed files with 15 additions and 3 deletions

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drivers/acpi/processor_perflib.c

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