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    Subject[PATCH 0/7] Register an Energy Model for Arm reference platforms
    Date
    The Energy Model (EM) framework feeds interested subsystems (the
    scheduler/EAS as of now) with power costs provided by drivers. Yet, no
    driver is actually doing that upstream yet. This series updates a set of
    CPUFreq drivers and DT files in order to register power costs in the EM
    framework for some of the Arm reference platforms for EAS: Hikey960,
    Juno and TC2.

    The series is split as follows:

    * Patch 01 introduces in PM_OPP a helper function which estimates the
    CPU power using the P=CV²f equation also used by IPA. It should be
    noted that this introduces duplicate code with IPA, which will
    eventually be fixed by migrating IPA to using PM_EM. The ideal plan
    would be to do so later, in a separate patch series. I would indeed
    prefer to keep the thermal and CPUFreq discussion separate at this
    stage, if deemed acceptable.

    * Patches 02-04 make use of that PM_OPP helper function from the
    following CPUFreq drivers: cpufreq-dt, scpi-cpufreq and
    arm_big_little.

    * Patch 05 modifies the SCMI cpufreq driver to pass the power costs
    obtained from firmware to PM_EM.

    * Patches 06-07 provide the dynamic-power-coefficient values for Juno
    and TC2.

    Thanks,
    Quentin

    Dietmar Eggemann (3):
    cpufreq: arm_big_little: Register an Energy Model
    arm64: dts: juno: Add cpu dynamic-power-coefficient information
    arm: dts: vexpress-v2p-ca15_a7: Add cpu dynamic-power-coefficient
    information

    Quentin Perret (4):
    PM / OPP: Introduce a power estimation helper
    cpufreq: dt: Register an Energy Model
    cpufreq: scpi: Register an Energy Model
    cpufreq: scmi: Register an Energy Model

    arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts | 5 ++
    arch/arm64/boot/dts/arm/juno-r2.dts | 6 +++
    arch/arm64/boot/dts/arm/juno.dts | 6 +++
    drivers/cpufreq/arm_big_little.c | 10 ++++
    drivers/cpufreq/cpufreq-dt.c | 7 ++-
    drivers/cpufreq/scmi-cpufreq.c | 36 ++++++++++++-
    drivers/cpufreq/scpi-cpufreq.c | 8 ++-
    drivers/opp/of.c | 60 ++++++++++++++++++++++
    include/linux/pm_opp.h | 5 ++
    9 files changed, 140 insertions(+), 3 deletions(-)

    --
    2.20.1

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