On 23-02-22, 11:22, Lukasz Luba wrote: > On 2/23/22 10:43, Viresh Kumar wrote: > > On 23-02-22, 10:52, Daniel Lezcano wrote: > > > why not extend the energy model to any kind of devices? > > > > FWIW, the OPP core supports a wide range of devices now, not just CPUs. There are many other devices which still use Freq. > Is that the "opp-level" thing which would allow that? For power supplies/regulators, we don't have freq and they use level, right. Also for interconnect we use bandwidth, in a similar way. > I can see some DT files with regulators(?) using it e.g. [1]. > It looks flexible, the opp-hz is not hard requirement, > the opp-level can be used instead IIUC. Right. > It might be a next step which might meet Daniel's needs. > If that 'level' can be any number and frequency is not available > then EM must have 'level' filed in the struct em_perf_state > for this kind of new devices. I'm open for such change. > We can discuss this as a next step. We would need to find some examples > how this new thing would be used. > > [1] https://elixir.bootlin.com/linux/v5.17-rc5/source/arch/arm/boot/dts/tegra20-peripherals-opp.dtsi#L4 -- viresh
