linux-kernel - Re: [PATCH 2/7] cpufreq: Retrieve current frequency from scaling drivers with internal governors

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Date:	Tue, 05 Feb 2013 18:31:57 -0800
From:	Dirk Brandewie <dirk.brandewie@...il.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
CC:	Dirk Brandewie <dirk.brandewie@...il.com>,
	linux-kernel@...r.kernel.org, cpufreq@...r.kernel.org,
	Dirk Brandewie <dirk.j.brandewie@...el.com>
Subject: Re: [PATCH 2/7] cpufreq: Retrieve current frequency from scaling
 drivers with internal governors

On 02/05/2013 06:25 PM, Viresh Kumar wrote:
> On Wed, Feb 6, 2013 at 7:45 AM, Dirk Brandewie <dirk.brandewie@...il.com> wrote:
>> How about this?
>>
>> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
>> index 2817c3c..9c0eac4 100644
>> --- a/drivers/cpufreq/cpufreq.c
>> +++ b/drivers/cpufreq/cpufreq.c
>> @@ -1182,7 +1182,12 @@ unsigned int cpufreq_quick_get(unsigned int cpu)
>>
>>          unsigned int ret_freq = 0;
>>
>>          if (policy) {
>> -               ret_freq = policy->cur;
>>
>> +               if (cpufreq_driver && cpufreq_driver->setpolicy &&
>> +                       cpufreq_driver->get) {
>> +                       ret_freq = cpufreq_driver->get(cpu);
>> +               } else {
>> +                       ret_freq = policy->cur;
>> +               }
>>                  cpufreq_cpu_put(policy);

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2817c3c..7516b7d 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1178,9 +1178,14 @@ 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);


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