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Running cpufreq-hw driver on Lenovo Yoga C630 laptop, the following warning messages will be seen. [ 3.415340] cpu cpu4: Voltage update failed freq=2841600 [ 3.418755] cpu cpu4: failed to update OPP for freq=2841600 [ 3.422949] cpu cpu4: Voltage update failed freq=2956800 [ 3.427086] cpu cpu4: failed to update OPP for freq=2956800 This is because the cpufreq-hw lookup table of SDM850 provides these two set-points, but they are missing from OPP table in DT. Let's create sdm850.dtsi to add the OPP for them, so that the warning will be gone. Signed-off-by: Steev Klimaszewski <steev@kali.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Link: https://lore.kernel.org/r/20210112090640.20062-1-shawn.guo@linaro.org Signed-off-by: Bjorn Andersson <bjorn.andersson@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.