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| author |   Dirk Brandewie <dirk.brandewie@gmail.com> | 2013-02-06 09:02:08 -0800 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-02-09 12:55:03 +0100 |
| commit | 9e21ba8bd849251c8ba22ddf39308a5227134fdc (patch) | |
| tree | 5e7066d016fcd32589146bee014bca8d91366658 /drivers/cpufreq/cpufreq.c | |
| parent | cpufreq: Fix locking issues (diff) | |
| download | linux-dev-9e21ba8bd849251c8ba22ddf39308a5227134fdc.tar.xz linux-dev-9e21ba8bd849251c8ba22ddf39308a5227134fdc.zip | |
cpufreq: Retrieve current frequency from scaling drivers with internal governors
Scaling drivers that implement the cpufreq_driver.setpolicy() versus
the cpufreq_driver.target() interface do not set policy->cur.
Normally policy->cur is set during the call to cpufreq_driver.target()
when the frequnecy request is made by the governor.
If the scaling driver implements cpufreq_driver.setpolicy() and
cpufreq_driver.get() interfaces use cpufreq_driver.get() to retrieve
the current frequency.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index e000f3691661..e98035dc2265 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1156,9 +1156,13 @@ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq, */ unsigned int cpufreq_quick_get(unsigned int cpu) { - struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + struct cpufreq_policy *policy; unsigned int ret_freq = 0; + if (cpufreq_driver && cpufreq_driver->setpolicy && cpufreq_driver->get) + return cpufreq_driver->get(cpu); + + policy = cpufreq_cpu_get(cpu); if (policy) { ret_freq = policy->cur; cpufreq_cpu_put(policy); |