Eric Anholt <e...@anholt.net> writes: > The hardware clocks are not controllable by the ARM, so we have to > make requests to the firmware to do so from the VPU side. This will > let us replace fixed clocks in our DT with actual clock control (and > correct frequency information).
Gordon from the Raspberry Pi Foundation just asked me "what do you mean, you can't access the clocks from the ARM?" I'd been assured I couldn't by another developer (who was originally going to write a Linux driver for this), and my own testing had also indicated I couldn't, but after a new round of hacking together some tests, I see things that look a lot like clockman registers. Looks like we're going to get a native driver, instead.
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