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Currently, when a controller is configured to use filtered mode, thermal readings are valid only about 30% of the time. Upon testing, it was noticed that lowering any of the interval settings resulted in an improved rate of valid data. The same was observed when decreasing the number of samples for each sensor (which also results in quicker measurements). Retrying the read with a timeout longer than the time it takes to resample (about 344us with these settings and 4 sensors) also improves the rate. Lower all timing settings to the minimum, configure the filtering to single sample, and poll the measurement register for at least one period to improve the data validity on filtered mode. With these changes in place, out of 100000 reads, a single one failed, ie 99.999% of the data was valid. Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Tested-by: Chen-Yu Tsai <wenst@chromium.org> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20230713154743.611870-1-nfraprado@collabora.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.
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.