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| author | Stratos Karafotis <stratosk@semaphore.gr> | 2014-06-30 20:59:33 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-07-21 15:43:19 +0400 |
| commit | 5b0c0b16d48d20e26859907df4dd449e3b3c7f4c (patch) | |
| tree | 39a03f932232701615350efba56302928362f634 /drivers | |
| parent | 22d0628a226c9864fabd621ef2bf64c841219b46 (diff) | |
| download | linux-5b0c0b16d48d20e26859907df4dd449e3b3c7f4c.tar.xz | |
cpufreq: Introduce new relation for freq selection
Introduce CPUFREQ_RELATION_C for frequency selection.
It selects the frequency with the minimum euclidean distance to target.
In case of equal distance between 2 frequencies, it will select the
greater frequency.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpufreq/freq_table.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c index 1632981c4b25..df14766a8e06 100644 --- a/drivers/cpufreq/freq_table.c +++ b/drivers/cpufreq/freq_table.c @@ -117,7 +117,7 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy, .frequency = 0, }; struct cpufreq_frequency_table *pos; - unsigned int freq, i = 0; + unsigned int freq, diff, i = 0; pr_debug("request for target %u kHz (relation: %u) for cpu %u\n", target_freq, relation, policy->cpu); @@ -127,6 +127,7 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy, suboptimal.frequency = ~0; break; case CPUFREQ_RELATION_L: + case CPUFREQ_RELATION_C: optimal.frequency = ~0; break; } @@ -168,6 +169,15 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy, } } break; + case CPUFREQ_RELATION_C: + diff = abs(freq - target_freq); + if (diff < optimal.frequency || + (diff == optimal.frequency && + freq > table[optimal.driver_data].frequency)) { + optimal.frequency = diff; + optimal.driver_data = i; + } + break; } } if (optimal.driver_data > i) { |