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authorDirk Brandewie <dirk.j.brandewie@intel.com>2014-03-19 19:45:53 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-03-20 06:50:12 +0400
commit367dc4aa932bfb33a3189064d33f7890a8ec1ca8 (patch)
treefde9bd6004ff7852da144a373dd1c0536521efef /include/linux/cpufreq.h
parentbda9f552f9826313ef8a477fc8e4891de9ae5e73 (diff)
downloadlinux-367dc4aa932bfb33a3189064d33f7890a8ec1ca8.tar.xz
cpufreq: Add stop CPU callback to cpufreq_driver interface
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>
Diffstat (limited to 'include/linux/cpufreq.h')
-rw-r--r--include/linux/cpufreq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 70929bcf1a9d..2d2e62c8666a 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -227,6 +227,7 @@ struct cpufreq_driver {
int (*bios_limit) (int cpu, unsigned int *limit);
int (*exit) (struct cpufreq_policy *policy);
+ void (*stop_cpu) (struct cpufreq_policy *policy);
int (*suspend) (struct cpufreq_policy *policy);
int (*resume) (struct cpufreq_policy *policy);
struct freq_attr **attr;