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    Subject[PATCH 0/4] powercap/dtpm: Add the DTPM framework
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    The density of components greatly increased the last decade bringing a
    numerous number of heating sources which are monitored by more than 20
    sensors on recent SoC. The skin temperature, which is the case
    temperature of the device, must stay below approximately 45°C in order
    to comply with the legal requirements.

    The skin temperature is managed as a whole by an user space daemon,
    which is catching the current application profile, to allocate a power
    budget to the different components where the resulting heating effect
    will comply with the skin temperature constraint.

    This technique is called the Dynamic Thermal Power Management.

    The Linux kernel does not provide any unified interface to act on the
    power of the different devices. Currently, the thermal framework is
    changed to export artificially the performance states of different
    devices via the cooling device software component with opaque values.
    This change is done regardless of the in-kernel logic to mitigate the
    temperature. The user space daemon uses all the available knobs to act
    on the power limit and those differ from one platform to another.

    This series provides a Dynamic Thermal Power Management framework to
    provide an unified way to act on the power of the devices.

    Daniel Lezcano (4):
    units: Add Watt units
    Documentation/powercap/dtpm: Add documentation for dtpm
    powercap/drivers/dtpm: Add API for dynamic thermal power management
    powercap/drivers/dtpm: Add CPU energy model based support

    Documentation/power/powercap/dtpm.rst | 222 +++++++++++++
    drivers/powercap/Kconfig | 14 +
    drivers/powercap/Makefile | 2 +
    drivers/powercap/dtpm.c | 430 ++++++++++++++++++++++++++
    drivers/powercap/dtpm_cpu.c | 242 +++++++++++++++
    include/asm-generic/vmlinux.lds.h | 11 +
    include/linux/cpuhotplug.h | 1 +
    include/linux/dtpm.h | 76 +++++
    include/linux/units.h | 4 +
    9 files changed, 1002 insertions(+)
    create mode 100644 Documentation/power/powercap/dtpm.rst
    create mode 100644 drivers/powercap/dtpm.c
    create mode 100644 drivers/powercap/dtpm_cpu.c
    create mode 100644 include/linux/dtpm.h

    --
    2.17.1

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