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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 c436096351f8..72f70b16d299 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 | |||
| 111 | For setting some of these values, the frequency table helpers might be | 111 | For setting some of these values, the frequency table helpers might be |
| 112 | helpful. See the section 2 for more information on them. | 112 | helpful. See the section 2 for more information on them. |
| 113 | 113 | ||
| 114 | SMP systems normally have same clock source for a group of cpus. For these the | ||
| 115 | .init() would be called only once for the first online cpu. Here the .init() | ||
| 116 | routine must initialize policy->cpus with mask of all possible cpus (Online + | ||
| 117 | Offline) that share the clock. Then the core would copy this mask onto | ||
| 118 | policy->related_cpus and will reset policy->cpus to carry only online cpus. | ||
| 119 | |||
| 114 | 120 | ||
| 115 | 1.3 verify | 121 | 1.3 verify |
| 116 | ------------ | 122 | ------------ |