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authorViresh Kumar <viresh.kumar@linaro.org>2013-03-27 15:58:58 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-01 01:11:34 +0200
commit4d5dcc4211f9def4281eafb54b8ed483862e8135 (patch)
tree7f3c725675ce3042d2d2eb86b0b40f93cef73de3 /drivers/cpufreq/cpufreq.c
parent7bd353a995d9049262661d85811d6109140582a3 (diff)
cpufreq: governor: Implement per policy instances of governors
Currently, there can't be multiple instances of single governor_type. If we have a multi-package system, where we have multiple instances of struct policy (per package), we can't have multiple instances of same governor. i.e. We can't have multiple instances of ondemand governor for multiple packages. Governors directory in sysfs is created at /sys/devices/system/cpu/cpufreq/ governor-name/. Which again reflects that there can be only one instance of a governor_type in the system. This is a bottleneck for multicluster system, where we want different packages to use same governor type, but with different tunables. This patch uses the infrastructure provided by earlier patch and implements init/exit routines for ondemand and conservative governors. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r--drivers/cpufreq/cpufreq.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 08df7a19611..85963fc48a5 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -128,6 +128,11 @@ void disable_cpufreq(void)
static LIST_HEAD(cpufreq_governor_list);
static DEFINE_MUTEX(cpufreq_governor_mutex);
+bool have_governor_per_policy(void)
+{
+ return cpufreq_driver->have_governor_per_policy;
+}
+
static struct cpufreq_policy *__cpufreq_cpu_get(unsigned int cpu, bool sysfs)
{
struct cpufreq_policy *data;
@@ -1546,10 +1551,12 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
policy->cpu, event);
ret = policy->governor->governor(policy, event);
- if (event == CPUFREQ_GOV_START)
- policy->governor->initialized++;
- else if (event == CPUFREQ_GOV_STOP)
- policy->governor->initialized--;
+ if (!ret) {
+ if (event == CPUFREQ_GOV_POLICY_INIT)
+ policy->governor->initialized++;
+ else if (event == CPUFREQ_GOV_POLICY_EXIT)
+ policy->governor->initialized--;
+ }
/* we keep one module reference alive for
each CPU governed by this CPU */