cpufreq: Add stop CPU callback to cpufreq_driver interface

Browse source

This callback allows the driver to do clean up before the CPU is
completely down and its state cannot be modified.  This is used
by the intel_pstate driver to reduce the requested P state prior to
the core going away.  This is required because the requested P state
of the offline core is used to select the package P state. This
effectively sets the floor package P state to the requested P state on
the offline core.

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
[rjw: Minor modifications]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

This commit is contained in:

Dirk Brandewie 2014-03-19 08:45:53 -07:00 • committed by Rafael J. Wysocki

parent bda9f552f9

commit 367dc4aa93

3 changed files with 10 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

Documentation/cpu-freq/cpu-drivers.txt

View file

2

drivers/cpufreq/cpufreq.c

View file

1

include/linux/cpufreq.h

View file