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    Subject[PATCH v4 0/5] Register an Energy Model for Arm reference platforms
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    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 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. This patch is independent from the
    rest of the series.


    Changes since v3 (20190201093101.31869-1-quentin.perret@arm.com)
    - Moved the OPP count inside dev_pm_opp_of_register_em() (Matthias,
    Sudeep)

    Changes since v2 (20190130170506.20450-1-quentin.perret@arm.com)
    - Added comment to explain why we check only the dynamic-power-coeff
    property and not voltages in dev_pm_opp_of_register_em() (Viresh)
    - Fixed comments/docstrings of new functions in opp/of.c (Matthias)
    - Added Matthias' Tested-by to patch 01

    Changes since v1 (20190128165522.31749-1-quentin.perret@arm.com):
    - Dropped the DT patches that have been queued by Sudeep
    - Introduced dev_pm_opp_of_register_em() helper to check the presence
    of the DT coeff before calling PM_EM (Viresh, Matthias)
    - Coding-style improvements (Viresh, Matthias)

    Thanks,
    Quentin

    Dietmar Eggemann (1):
    cpufreq: arm_big_little: Register an Energy Model

    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

    drivers/cpufreq/arm_big_little.c | 2 +
    drivers/cpufreq/cpufreq-dt.c | 2 +
    drivers/cpufreq/scmi-cpufreq.c | 39 ++++++++++++-
    drivers/cpufreq/scpi-cpufreq.c | 3 +
    drivers/opp/of.c | 99 ++++++++++++++++++++++++++++++++
    include/linux/pm_opp.h | 6 ++
    6 files changed, 148 insertions(+), 3 deletions(-)

    --
    2.20.1

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