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SubjectRe: [PATCH 4/4] cpu_cooling: Drop static-power related stuff
On Tue, Nov 21, 2017 at 07:05:46PM +0100, Daniel Lezcano wrote:
> On 21/11/2017 19:00, Javi Merino wrote:
> > Hi,
> >
> > On Tue, Nov 21, 2017 at 08:57:06AM -0800, Eduardo Valentin wrote:
> >
> > [snip]
> >
> >> As I said before, the minimal you guys (ARM and Linaro) can do is to at
> >> least upstream the Juno code! as a reference. Come on guys? what is
> >> preventing you to upstream Juno model?
> >
> > As Ionela pointed out earlier in the thread, the cpufreq driver for Juno
> > was not acceptable for mainline because it used platform specific code.
> > When it was converted to cpufreq-dt, the static power was left behind
> > because it can't be represented in device tree. This is because there
> > isn't a function that works for every SoC, different process nodes
> > (among other things) will need different functions. So it can't be just
> > a bunch of coefficients in DT, we need a function. Hence the callback.
>
> The DT could contain the coef and a compatible string for a specific
> polynomial computation callback. I imagine we should not have a lot of
> different equations, no ?
>

Yeah, that would be another way of doing it. If there is no equation
that correlates all processes, then we need a vendor specific entry, or
a compatible string, as Daniel said.

>
>
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