Many cpufreq drivers register with the energy model for each policy and do exactly the same thing. Follow the footsteps of thermal-cooling, to get it done from the cpufreq core itself. Provide a new callback, which will be called, if present, by the cpufreq core at the right moment (more on that in the code's comment). Also provide a generic implementation that uses dev_pm_opp_of_register_em(). This also allows us to register with the EM at a later point of time, compared to ->init(), from where the EM core can access cpufreq policy directly using cpufreq_cpu_get() type of helpers and perform other work, like marking few frequencies inefficient, this will be done separately. This is build/boot tested by the bot for a couple of boards. https://gitlab.com/vireshk/pmko/-/pipelines/351965580 FWIW, I have queued up the series for linux-next to get more testing, but your reviews are welcome. Thanks. V2->V3: - Drop the auto-register part from all logs, this isn't called auto registration anymore. - Call register_em() only for new policies. - Update scmi driver to register with EM only when required. - Add Rby tags. V1->V2: - Add a callback instead of flag. - Register before governor is initialized. - Update scmi driver as well. - Don't unregister from the EM core. -- Viresh Viresh Kumar (9): cpufreq: Add callback to register with energy model cpufreq: dt: Use .register_em() to register with energy model cpufreq: imx6q: Use .register_em() to register with energy model cpufreq: mediatek: Use .register_em() to register with energy model cpufreq: omap: Use .register_em() to register with energy model cpufreq: qcom-cpufreq-hw: Use .register_em() to register with energy model cpufreq: scpi: Use .register_em() to register with energy model cpufreq: vexpress: Use .register_em() to register with energy model cpufreq: scmi: Use .register_em() to register with energy model drivers/cpufreq/cpufreq-dt.c | 3 +- drivers/cpufreq/cpufreq.c | 13 ++++++ drivers/cpufreq/imx6q-cpufreq.c | 2 +- drivers/cpufreq/mediatek-cpufreq.c | 3 +- drivers/cpufreq/omap-cpufreq.c | 2 +- drivers/cpufreq/qcom-cpufreq-hw.c | 3 +- drivers/cpufreq/scmi-cpufreq.c | 65 +++++++++++++++++--------- drivers/cpufreq/scpi-cpufreq.c | 3 +- drivers/cpufreq/vexpress-spc-cpufreq.c | 3 +- include/linux/cpufreq.h | 14 ++++++ 10 files changed, 76 insertions(+), 35 deletions(-) -- 2.31.1.272.g89b43f80a514
