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Both NVIDIA Tegra20 and Tegra30 SoCs should be blacklisted because CPU
OPPs use supported_hw and thus platdev isn't suitable for these SoCs.
Currently cpufreq-dt driver produces a bit annoying warning splats
during boot because valid OPPs are not found, this will be fixed once
tegra20-cpufreq driver will be update to support cpufreq-dt. The warnings
will also happen on older stable kernels using newer device-trees, thus
this patch should be backported to stable kernels as well.
Cc: <stable@vger.kernel.org>
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Fixes: 4053aa65c5 ("ARM: tegra: cardhu-a04: Add CPU Operating Performance Points")
Signed-off-by: Dmitry Osipenko <digetx@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 Restructured Text 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.