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-rw-r--r--include/linux/cpufreq.h20
1 files changed, 17 insertions, 3 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 3ec6e7ff5fb..9e5f5d0c87f 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -155,6 +155,9 @@ struct cpufreq_governor {
char name[CPUFREQ_NAME_LEN];
int (*governor) (struct cpufreq_policy *policy,
unsigned int event);
+ unsigned int max_transition_latency; /* HW must be able to switch to
+ next freq faster than this value in nano secs or we
+ will fallback to performance governor */
struct list_head governor_list;
struct module *owner;
};
@@ -279,12 +282,23 @@ static inline unsigned int cpufreq_quick_get(unsigned int cpu)
*********************************************************************/
-#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+/*
+ Performance governor is fallback governor if any other gov failed to
+ auto load due latency restrictions
+*/
extern struct cpufreq_governor cpufreq_gov_performance;
-#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_performance
+#define CPUFREQ_PERFORMANCE_GOVERNOR (&cpufreq_gov_performance)
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance)
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
extern struct cpufreq_governor cpufreq_gov_userspace;
-#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_userspace
+#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND)
+extern struct cpufreq_governor cpufreq_gov_ondemand;
+#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE)
+extern struct cpufreq_governor cpufreq_gov_conservative;
+#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative)
#endif