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Collision of writing rf registers could occur if the driver writes rf registers by direct write while the hardware is writing other rf registers by pi write simultaneously. Hardware pi write can be triggered by rf calibrations sometimes, so the driver can not always write rf registers by direct write protection. Direct write protection can make sure that there is no hardware pi write during the direct write. According to some experiments, if we add direct write protection when switching channel, the performance of rf calibration will not be affected. Signed-off-by: Chien-Hsun Liao <ben.liao@realtek.com> Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.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.