This patch adds support to be able to use the cpufreq
'prepare-to-transition'
and 'finish-transition' nofifier lists for PowerOp transitions.
Signed-Off-by: David Singleton <dsingleton at mvista.com>
drivers/cpufreq/cpufreq.c | 36 ++++++++++++++++++++++++++++++++++++
include/linux/cpufreq.h | 2 ++
2 files changed, 38 insertions(+)
Index: linux-2.6.17/drivers/cpufreq/cpufreq.c
===================================================================
--- linux-2.6.17.orig/drivers/cpufreq/cpufreq.c
+++ linux-2.6.17/drivers/cpufreq/cpufreq.c
@@ -226,6 +226,35 @@ static void adjust_jiffies(unsigned long
static inline void adjust_jiffies(unsigned long val, struct
cpufreq_freqs *ci) { return; }
#endif
+int cpufreq_prepare_transition(struct powerop *cur, struct powerop *new)
+{
+ struct cpufreq_freqs freqs;
+
+ freqs.old = cur->frequency;
+ freqs.new = new->frequency;
+ freqs.cpu = 0;
+ freqs.flags = cpufreq_driver->flags;
+ blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+ CPUFREQ_PRECHANGE, &freqs);
+ adjust_jiffies(CPUFREQ_PRECHANGE, &freqs);
+ return 0;
+}
+EXPORT_SYMBOL(cpufreq_prepare_transition);
+
+int cpufreq_finish_transition(struct powerop *cur, struct powerop *new)
+{
+ struct cpufreq_freqs freqs;
+
+ freqs.old = cur->frequency;
+ freqs.new = new->frequency;
+ freqs.cpu = 0;
+ freqs.flags = cpufreq_driver->flags;
+ adjust_jiffies(CPUFREQ_POSTCHANGE, &freqs);
+ blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+ CPUFREQ_POSTCHANGE, &freqs);
+ return 0;
+}
+EXPORT_SYMBOL(cpufreq_finish_transition);
/**
* cpufreq_notify_transition - call notifier chain and adjust_jiffies
@@ -884,6 +913,12 @@ static void cpufreq_out_of_sync(unsigned
}
+#ifdef CONFIG_PM
+unsigned int cpufreq_quick_get(unsigned int cpu)
+{
+ return (current_state->frequency * 1000);
+}
+#else
/**
* cpufreq_quick_get - get the CPU frequency (in kHz) frpm policy->cur
* @cpu: CPU number
@@ -905,6 +940,7 @@ unsigned int cpufreq_quick_get(unsigned
return (ret);
}
+#endif
EXPORT_SYMBOL(cpufreq_quick_get);
Index: linux-2.6.17/include/linux/cpufreq.h
===================================================================
--- linux-2.6.17.orig/include/linux/cpufreq.h
+++ linux-2.6.17/include/linux/cpufreq.h
@@ -271,6 +271,8 @@ static inline unsigned int cpufreq_quick
return 0;
}
#endif
+int cpufreq_prepare_transition(struct powerop *cur, struct powerop *new);
+int cpufreq_finish_transition(struct powerop *cur, struct powerop *new);
/*********************************************************************
