I'm using the standard firmware with an OpenEmbedded filesystem on a Juno Development Platform
I believe that this early release includes no thermal protection and the CPU clock speeds are fixed and under-clocked. Currently, the SCP firmware limits the clocks to Cortex-A57 600MHz and Cortex-A53 600MHz.
The Juno Software Release Interim3 made earlier this week includes DVFS support for the CPUs with the following higher frequency operating points;
Hi,markn,
Do you know how to change the cpufreq? do need modify SCP firmware? and, how to get the source code? @markn sudeep.holla
thanks.
Hi,
Have you tried sysfs operations to change governor and frequency mentioned
in my earlier response on this thread ?
Also you must not require any change in SCP if you are using interim3 and above
releases, but it's always good to use latest firmware binaries. If you prefer to compile
and run your own kernel and modules, you can do so from the source hosted in the
GitHub[1]
Regards,
Sudeep
[1] ARM-software/linux · GitHub
Hi Sudeep Holla,
I see, thanks a lot.
Best wishes.