On 1 February 2013 12:17, Santosh Shilimkar santosh.shilimkar@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.