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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2013-04-09 22:38:18 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-10 13:42:45 +0200
commitd1b6848590af407c5d2354929ac683052d631830 (patch)
tree482ffe294513d0c6856a419f1f7cba786ea79c34 /drivers/cpufreq
parent49ded525d4486dc97fc965858bf3ddf245463670 (diff)
cpufreq / intel_pstate: Optimize intel_pstate_set_policy
This function is called quite often from other subsystems. Removed unused call to intel_pstate_get_min_max(). Also when "policy->policy == CPUFREQ_POLICY_PERFORMANCE", then no need to do calculations as the limits will be forced anyway. Also corrected filename in the header. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.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')
-rw-r--r--drivers/cpufreq/intel_pstate.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index ad72922919ed..fb382427b059 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1,5 +1,5 @@
/*
- * cpufreq_snb.c: Native P state management for Intel processors
+ * intel_pstate.c: Native P state management for Intel processors
*
* (C) Copyright 2012 Intel Corporation
* Author: Dirk Brandewie <dirk.j.brandewie@intel.com>
@@ -658,30 +658,27 @@ static unsigned int intel_pstate_get(unsigned int cpu_num)
static int intel_pstate_set_policy(struct cpufreq_policy *policy)
{
struct cpudata *cpu;
- int min, max;
cpu = all_cpu_data[policy->cpu];
if (!policy->cpuinfo.max_freq)
return -ENODEV;
- intel_pstate_get_min_max(cpu, &min, &max);
-
- limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
- limits.min_perf_pct = clamp_t(int, limits.min_perf_pct, 0 , 100);
- limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
-
- limits.max_perf_pct = policy->max * 100 / policy->cpuinfo.max_freq;
- limits.max_perf_pct = clamp_t(int, limits.max_perf_pct, 0 , 100);
- limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
-
if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) {
limits.min_perf_pct = 100;
limits.min_perf = int_tofp(1);
limits.max_perf_pct = 100;
limits.max_perf = int_tofp(1);
limits.no_turbo = 0;
+ return 0;
}
+ limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
+ limits.min_perf_pct = clamp_t(int, limits.min_perf_pct, 0 , 100);
+ limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
+
+ limits.max_perf_pct = policy->max * 100 / policy->cpuinfo.max_freq;
+ limits.max_perf_pct = clamp_t(int, limits.max_perf_pct, 0 , 100);
+ limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
return 0;
}