linux-kernel - Re: OpPoint summary

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Date:	Thu, 14 Sep 2006 10:03:02 -0700
From:	"David Singleton" <daviado@...il.com>
To:	"Greg KH" <greg@...ah.com>
Cc:	linux-pm@...ts.osdl.org,
	"kernel list" <linux-kernel@...r.kernel.org>
Subject: Re: OpPoint summary

> Care to resend your patches in the proper format, through email so that
> we can see them, and possibly get some testing in -mm if they look sane?

Greg,
   here's the patch that leverages the cpufreq notifier lists for
driver PRE and POST
change functions.  I'm also rebasing to 2.6.18-rc7 and making changes Pavel
suggested about just having suspend states in /sys/power/state and moving
the operating point control file down under
/sys/power/operating_states directory.


Signed-Off-by: David Singleton <dsingleton@...sta.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 oppoint *cur, struct oppoint *new)
+{
+       struct cpufreq_freqs freqs;
+
+       freqs.old = cur->frequency;
+       freqs.new = new->frequency;
+       freqs.cpu = 0;
+       freqs.flags = new->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 oppoint *cur, struct oppoint *new)
+{
+       struct cpufreq_freqs freqs;
+
+       freqs.old = cur->frequency;
+       freqs.new = new->frequency;
+       freqs.cpu = 0;
+       freqs.flags = new->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);
+}
+#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 oppoint *cur, struct oppoint *new);
+int cpufreq_finish_transition(struct oppoint *cur, struct oppoint *new);


 /*********************************************************************



>
> thanks,
>
> greg k-h
>
-
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