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@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
> 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.
Best regards,
--
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform
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