On 1 February 2013 12:17, Santosh Shilimkar <santosh.shilim...@ti.com> wrote:
> I haven't looked at the cpufreq code recently but remember
> that it was needed to ensure that all the CPU which
> share clock/voltage gets updated (affected cpus) on
> freq change. The CPUs which needs SW co-ordination, should
> have this flag enabled and OMAP was falling in that category.
Freq change are done by the target routines of platform cpufreq drivers
and they do something like:
for_each_cpu(freqs.cpu, policy->cpus)
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
The only requirement from cpufreq core is to keep cpus sharing clock
in policy->cpus.
> May be I miss-understood its use, but can you confirm that
> SW co-ordination logic continues to work without this flag ?
I believe it should work. It works for the systems i worked on:
SPEAr13xx: Dual Cortex A9
ARM TC2: two clusters of A15s and A7s.
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