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The Energy Model framework provides an API to register the active power of CPUs. Call this API from the cpufreq-dt driver with an estimation of the power as P = C * V^2 * f with C, V, and f respectively the capacitance of the CPU and the voltage and frequency of the OPP. The CPU capacitance is read from the "dynamic-power-coefficient" DT binding (originally introduced for thermal/IPA), and the voltage and frequency values from PM_OPP. Change-Id: Id7b79ae3aafcc53574b850cb91a25240ebffbdd4 Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Viresh Kumar <viresh.kumar@linaro.org> (Removed "OPTIONAL" label from title. Applied from https://lore.kernel.org/lkml/20180912091309.7551-15-quentin.perret@arm.com/) Signed-off-by: Quentin Perret <quentin.perret@arm.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.