Re: [PATCH v5 1/3] clk: bcm2835: Add binding docs for the Raspberry Pi clock provider

Eric Anholt
2015-08-25T00:31:43Z

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Eric Anholt <eric@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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