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cpufreq: Introduce cpufreq_update_current_freq()

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Move the part of cpufreq_update_policy() that obtains the current
frequency from the driver and updates policy->cur if necessary to
a separate function, cpufreq_get_current_freq().

That should not introduce functional changes and subsequent change
set will need it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2016-03-21 15:46:25 +01:00
parent 0a300767e5
commit 999f572983
1 changed files with 19 additions and 9 deletions
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28
drivers/cpufreq/cpufreq.c
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@ -1487,6 +1487,24 @@ unsigned int cpufreq_get(unsigned int cpu)
}
EXPORT_SYMBOL(cpufreq_get);
static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
{
unsigned int new_freq;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
if (!policy->cur) {
pr_debug("cpufreq: Driver did not initialize current freq\n");
policy->cur = new_freq;
} else if (policy->cur != new_freq && has_target()) {
cpufreq_out_of_sync(policy, new_freq);
}
return new_freq;
}
static struct subsys_interface cpufreq_interface = {
.name = "cpufreq",
.subsys = &cpu_subsys,
@ -2152,19 +2170,11 @@ int cpufreq_update_policy(unsigned int cpu)
* -> ask driver for current freq and notify governors about a change
*/
if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {
new_policy.cur = cpufreq_driver->get(cpu);
new_policy.cur = cpufreq_update_current_freq(policy);
if (WARN_ON(!new_policy.cur)) {
ret = -EIO;
goto unlock;
}
if (!policy->cur) {
pr_debug("Driver did not initialize current freq\n");
policy->cur = new_policy.cur;
} else {
if (policy->cur != new_policy.cur && has_target())
cpufreq_out_of_sync(policy, new_policy.cur);
}
}
ret = cpufreq_set_policy(policy, &new_policy);