[PATCH] cpufreq: exynos: Broadcast frequency change notifications for all cores

Hi Rafael,

On Wednesday 21 of November 2012 21:47:42 Rafael J. Wysocki wrote:

On Wednesday, November 21, 2012 02:52:26 PM Tomasz Figa wrote:

quoted

On Tuesday 13 of November 2012 10:26:12 Tomasz Figa wrote:

quoted

On Exynos SoCs all cores share the same frequency setting, so
changing
frequency of one core will affect rest of cores.

This patch modifies the exynos-cpufreq driver to inform cpufreq core
about this behavior and broadcast frequency change notifications for
all cores.

Signed-off-by: Tomasz Figa <redacted>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---

 drivers/cpufreq/exynos-cpufreq.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/exynos-cpufreq.c

b/drivers/cpufreq/exynos-cpufreq.c index af2d81e..c0d54a8 100644

--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c

@@ -100,7 +100,8 @@ static int exynos_target(struct cpufreq_policy

*policy, }

 	arm_volt = volt_table[index];

-	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+	for_each_cpu(freqs.cpu, policy->cpus)
+		cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);

 	/* When the new frequency is higher than current frequency */
 	if ((freqs.new > freqs.old) && !safe_arm_volt) {

@@ -115,7 +116,8 @@ static int exynos_target(struct cpufreq_policy

*policy, if (freqs.new != freqs.old)

 		exynos_info->set_freq(old_index, index);

-	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+	for_each_cpu(freqs.cpu, policy->cpus)
+		cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);

 	/* When the new frequency is lower than current frequency */
 	if ((freqs.new < freqs.old) ||

@@ -235,6 +237,7 @@ static int exynos_cpufreq_cpu_init(struct

cpufreq_policy *policy) cpumask_copy(policy->related_cpus,
cpu_possible_mask);

 		cpumask_copy(policy->cpus, cpu_online_mask);
 	
 	} else {

+		policy->shared_type = CPUFREQ_SHARED_TYPE_ANY;

 		cpumask_setall(policy->cpus);
 	
 	}

Ping.

Am I supposed to handle this?

I guess. Would be really nice if you could apply this patch for 3.8.

Best regards,
Tomasz Figa