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Every transfer that > waits for the completion interrupt therefore times out, scmi-cpufreq > fails to probe with -110, and the machine ends up with no cpufreq at all > -- all CPUs pinned at their boot OPP. I'm not seeing this issue, but I heard others hit it, possibly due to some timing bug. If you set your kernel config to build all drivers in (i.e. change =m to =y), do you still face this? Konrad