From mboxrd@z Thu Jan  1 00:00:00 1970
From: tomasz.figa@gmail.com (Tomasz Figa)
Date: Wed, 21 Nov 2012 22:23:02 +0100
Subject: [PATCH] cpufreq: exynos: Broadcast frequency change notifications
 for all cores
In-Reply-To: <4440154.l7bQzsqNex@vostro.rjw.lan>
References: <1887364.fvxYYNb7Mm@amdc1227> <1758658.Qt0SyRnJmS@amdc1227>
 <4440154.l7bQzsqNex@vostro.rjw.lan>
Message-ID: <3562672.u4N3XIHFEC@flatron>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

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:
> > On Tuesday 13 of November 2012 10:26:12 Tomasz Figa wrote:
> > > 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 <t.figa@samsung.com>
> > > 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