cpufreq on PandaBoard

[Ben Gamari]

Booting a PandaBoard with a recent kernel and devicetree appears to be a
rather messy process. There are dozens of devicetree-related warnings
spewed on boot (many pertaining to missing regulators). At the moment,
however, I'm most interested in this,

    cpufreq-cpu0 cpufreq-cpu0.0: no of_node; not parsing pinctrl DT
    cpu cpu0: dummy supplies not allowed
    cpufreq_cpu0: failed to get cpu0 regulator: -19
    cpufreq_cpu0: failed to get cpu0 clock: -2
    cpufreq-cpu0: probe of cpufreq-cpu0.0 failed with error -2

What is the status of cpufreq on the PandaBoard? Is this expected to
work?

More generally, if one wants a fairly recent kernel supporting the
PandaBoard's hardware what kernel tree should be used? Is mainline not
yet appropriate? Is linux-next preferred? Perhaps a ti-maintained tree?

Cheers,

- Ben
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