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Andre Przywara
fa5aec9561
The opp_supported_hw DT property allows the DT to specify a mask of chip revisions that a certain OPP is eligible for. This allows for easy limiting of maximum frequencies, for instance. Add support for that in the sun50i-cpufreq-nvmem driver. We support both the existing opp-microvolt suffix properties as well as the opp-supported-hw property, the generic code figures out which is needed automatically. However if none of the DT OPP nodes contain an opp-supported-hw property, the core code will ignore all OPPs and the driver will fail probing. So check the DT's eligibility first before using that feature. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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 reStructuredText markup notation.
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.