[04/34] cpufreq: at32ap: remove calls to cpufreq_notify_transition()

Message ID 1507bf552f7f9f61197c599236be870e739b337c.1376619363.git.viresh.kumar@linaro.org
State New
Headers show

Commit Message

Viresh Kumar Aug. 16, 2013, 2:25 a.m.
Most of the drivers do following in their ->target_index() routines:

	struct cpufreq_freqs freqs;
	freqs.old = old freq...
	freqs.new = new freq...

	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);

	/* Change rate here */

	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);

This is replicated over all cpufreq drivers today and there doesn't exists a
good enough reason why this shouldn't be moved to cpufreq core instead.

Earlier patches have added support in cpufreq core to do cpufreq notification on
frequency change, this one removes it from this driver.

Some related minor cleanups are also done along with it.

Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/at32ap-cpufreq.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

Comments

Hans-Christian Noren Egtvedt Aug. 16, 2013, 5:58 a.m. | #1
Around Fri 16 Aug 2013 07:55:01 +0530 or thereabout, Viresh Kumar wrote:
> Most of the drivers do following in their ->target_index() routines:
> 
> 	struct cpufreq_freqs freqs;
> 	freqs.old = old freq...
> 	freqs.new = new freq...
> 
> 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
> 
> 	/* Change rate here */
> 
> 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
> 
> This is replicated over all cpufreq drivers today and there doesn't exists a
> good enough reason why this shouldn't be moved to cpufreq core instead.
> 
> Earlier patches have added support in cpufreq core to do cpufreq notification on
> frequency change, this one removes it from this driver.
> 
> Some related minor cleanups are also done along with it.
> 
> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>

> ---
>  drivers/cpufreq/at32ap-cpufreq.c | 22 +++++++++-------------
>  1 file changed, 9 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/cpufreq/at32ap-cpufreq.c b/drivers/cpufreq/at32ap-cpufreq.c

<snipp>

Patch

diff --git a/drivers/cpufreq/at32ap-cpufreq.c b/drivers/cpufreq/at32ap-cpufreq.c
index 81d0752..856ad80 100644
--- a/drivers/cpufreq/at32ap-cpufreq.c
+++ b/drivers/cpufreq/at32ap-cpufreq.c
@@ -37,27 +37,23 @@  static unsigned long	loops_per_jiffy_ref;
 
 static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
-	struct cpufreq_freqs freqs;
+	unsigned int old_freq, new_freq;
 
-	freqs.old = at32_get_speed(0);
-	freqs.new = freq_table[index].frequency;
+	old_freq = at32_get_speed(0);
+	new_freq = freq_table[index].frequency;
 
 	if (!ref_freq) {
-		ref_freq = freqs.old;
+		ref_freq = old_freq;
 		loops_per_jiffy_ref = boot_cpu_data.loops_per_jiffy;
 	}
 
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-	if (freqs.old < freqs.new)
+	if (old_freq < new_freq)
 		boot_cpu_data.loops_per_jiffy = cpufreq_scale(
-				loops_per_jiffy_ref, ref_freq, freqs.new);
-	clk_set_rate(cpuclk, freqs.new * 1000);
-	if (freqs.new < freqs.old)
+				loops_per_jiffy_ref, ref_freq, new_freq);
+	clk_set_rate(cpuclk, new_freq * 1000);
+	if (new_freq < old_freq)
 		boot_cpu_data.loops_per_jiffy = cpufreq_scale(
-				loops_per_jiffy_ref, ref_freq, freqs.new);
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
-	pr_debug("cpufreq: set frequency %u Hz\n", freqs.new * 1000);
+				loops_per_jiffy_ref, ref_freq, new_freq);
 
 	return 0;
 }