Re: Dynanic On-The-Fly Operating points for PowerOP

[david singleton <dsingleton@mvista.com>]

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Here's the powerop-cpufreq.patch.  It hasn't changed from the 
2.6.18-rc1 version (I think).


David



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Signed-Off-by: David Singleton <dsingleton@mvista.com>

 drivers/cpufreq/cpufreq.c |   40 ++++++++++++++++++++++++++++++++++++++--
 include/linux/cpufreq.h   |    2 ++
 2 files changed, 40 insertions(+), 2 deletions(-)

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
@@ -213,19 +213,48 @@ static void adjust_jiffies(unsigned long
 	if (!l_p_j_ref_freq) {
 		l_p_j_ref = loops_per_jiffy;
 		l_p_j_ref_freq = ci->old;
-		dprintk("saving %lu as reference value for loops_per_jiffy; freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
+		printk("saving %lu as reference value for loops_per_jiffy; freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
 	}
 	if ((val == CPUFREQ_PRECHANGE  && ci->old < ci->new) ||
 	    (val == CPUFREQ_POSTCHANGE && ci->old > ci->new) ||
 	    (val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) {
 		loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq, ci->new);
-		dprintk("scaling loops_per_jiffy to %lu for frequency %u kHz\n", loops_per_jiffy, ci->new);
+		printk("scaling loops_per_jiffy to %lu for frequency %u kHz\n", loops_per_jiffy, ci->new);
 	}
 }
 #else
 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
@@ -920,6 +949,12 @@ 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
@@ -941,6 +976,7 @@ 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
@@ -268,6 +268,8 @@ 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);
 
 
 /*********************************************************************

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