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Diffstat (limited to 'Documentation/cpu-freq/cpu-drivers.txt')
| -rw-r--r-- | Documentation/cpu-freq/cpu-drivers.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/cpu-drivers.txt b/Documentation/cpu-freq/cpu-drivers.txt index c436096351f..72f70b16d29 100644 --- a/Documentation/cpu-freq/cpu-drivers.txt +++ b/Documentation/cpu-freq/cpu-drivers.txt @@ -111,6 +111,12 @@ policy->governor must contain the "default policy" for For setting some of these values, the frequency table helpers might be helpful. See the section 2 for more information on them. +SMP systems normally have same clock source for a group of cpus. For these the +.init() would be called only once for the first online cpu. Here the .init() +routine must initialize policy->cpus with mask of all possible cpus (Online + +Offline) that share the clock. Then the core would copy this mask onto +policy->related_cpus and will reset policy->cpus to carry only online cpus. + 1.3 verify ------------ |