linux/arch/x86/kernel/cpu/cpufreq
Naga Chumbalkar 0f1d683fb3 [CPUFREQ] Processor Clocking Control interface driver
Processor Clocking Control (PCC) is an interface between the BIOS and OSPM.
Based on the server workload, OSPM can request what frequency it expects
from a logical CPU, and the BIOS will achieve that frequency transparently.

This patch introduces driver support for PCC. OSPM uses the PCC driver to
communicate with the BIOS via the PCC interface.

There is a Documentation file that provides a link to the PCC
Specification, and also provides a summary of the PCC interface.

Currently, certain HP ProLiant platforms implement the PCC interface. However,
any platform whose BIOS implements the PCC Specification, can utilize this
driver.

V2 --> V1 changes (based on Dominik's suggestions):
- Removed the dependency on CPU_FREQ_TABLE
- "cpufreq_stats" will no longer PANIC. Actually, it will not load anymore
because it is not applicable.
- Removed the sanity check for target frequency in the ->target routine.

NOTE: A patch to sanitize the target frequency requested by "ondemand" is
needed to ensure that the target freq < policy->min.

Can this driver be queued up for the 2.6.33 tree?

Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-01-13 10:55:16 -05:00
..
acpi-cpufreq.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-12-14 09:58:24 -08:00
cpufreq-nforce2.c [CPUFREQ] Make cpufreq-nforce2 less obnoxious 2009-02-24 22:47:32 -05:00
e_powersaver.c Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
elanfreq.c [CPUFREQ] checkpatch cleanups for elanfreq 2009-02-24 22:47:28 -05:00
gx-suspmod.c [CPUFREQ] checkpatch cleanups for gx-suspmod 2009-02-24 22:47:29 -05:00
Kconfig [CPUFREQ] Processor Clocking Control interface driver 2010-01-13 10:55:16 -05:00
longhaul.c ACPICA: Add post-order callback to acpi_walk_namespace 2009-11-24 21:31:10 -05:00
longhaul.h [CPUFREQ] checkpatch cleanups for longhaul 2009-02-24 22:47:29 -05:00
longrun.c [CPUFREQ] checkpatch cleanups for longrun 2009-02-24 22:47:29 -05:00
Makefile [CPUFREQ] Processor Clocking Control interface driver 2010-01-13 10:55:16 -05:00
p4-clockmod.c [CPUFREQ] add atom family to p4-clockmod 2009-05-26 12:04:50 -04:00
pcc-cpufreq.c [CPUFREQ] Processor Clocking Control interface driver 2010-01-13 10:55:16 -05:00
powernow-k6.c [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used 2009-11-24 13:33:33 -05:00
powernow-k7.c [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface 2009-11-24 13:33:34 -05:00
powernow-k7.h [CPUFREQ] cpufreq: remove CVS keywords 2008-05-19 18:17:49 -04:00
powernow-k8.c [CPUFREQ] Fix use after free of struct powernow_k8_data 2010-01-13 10:55:15 -05:00
powernow-k8.h [CPUFREQ] Powernow-k8: support family 0xf with 2 low p-states 2009-07-06 21:38:29 -04:00
sc520_freq.c [CPUFREQ] checkpatch cleanups for sc520 2009-02-24 22:47:29 -05:00
speedstep-centrino.c [CPUFREQ] cpumask: avoid cpumask games in arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c 2009-06-15 11:49:43 -04:00
speedstep-ich.c [CPUFREQ] use an enum for speedstep processor identification 2009-11-24 13:33:34 -05:00
speedstep-lib.c [CPUFREQ] use an enum for speedstep processor identification 2009-11-24 13:33:34 -05:00
speedstep-lib.h [CPUFREQ] use an enum for speedstep processor identification 2009-11-24 13:33:34 -05:00
speedstep-smi.c [CPUFREQ] use an enum for speedstep processor identification 2009-11-24 13:33:34 -05:00