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cpufreq: acpi-cpufreq: use cached frequency mapping when possible 

A call to cpufreq_driver_resolve_freq will cache the mapping from
the desired target frequency to the frequency table index. If there
is a mapping for the desired target frequency then use it instead of
looking up the mapping again.

Signed-off-by: Steve Muckle <smuckle@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Steve Muckle 2016-07-13 13:25:27 -07:00 committed by Rafael J. Wysocki
parent 5cbea46984
commit 5b6667c76d
1 changed files with 4 additions and 1 deletions
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5
drivers/cpufreq/acpi-cpufreq.c
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@ -473,7 +473,10 @@ unsigned int acpi_cpufreq_fast_switch(struct cpufreq_policy *policy,
/*
* Find the closest frequency above target_freq.
*/
index = cpufreq_table_find_index_dl(policy, target_freq);
if (policy->cached_target_freq == target_freq)
index = policy->cached_resolved_idx;
else
index = cpufreq_table_find_index_dl(policy, target_freq);
entry = &policy->freq_table[index];
next_freq = entry->frequency;