Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...

[~andy/linux] / Documentation / ABI / testing / sysfs-devices-system-cpu

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 2447698aed41d73a98326f8ae67e89062ab29889..468e4d48f88437916117e3377147f51951db7982 100644 (file)
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -144,6 +144,21 @@ Description:       Discover and change clock speed of CPUs
                to learn how to control the knobs.
 
 
+What:          /sys/devices/system/cpu/cpu#/cpufreq/freqdomain_cpus
+Date:          June 2013
+Contact:       cpufreq@vger.kernel.org
+Description:   Discover CPUs in the same CPU frequency coordination domain
+
+               freqdomain_cpus is the list of CPUs (online+offline) that share
+               the same clock/freq domain (possibly at the hardware level).
+               That information may be hidden from the cpufreq core and the
+               value of related_cpus may be different from freqdomain_cpus. This
+               attribute is useful for user space DVFS controllers to get better
+               power/performance results for platforms using acpi-cpufreq.
+
+               This file is only present if the acpi-cpufreq driver is in use.
+
+
 What:          /sys/devices/system/cpu/cpu*/cache/index3/cache_disable_{0,1}
 Date:          August 2008
 KernelVersion: 2.6.27