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The fingerprint sensor, hidden in the power button, is connected to one of the USB multiport ports; while the other port is unused. Describe the USB controller, the four phys and the repeater involved to make the fingerprint sensor operational. Tested-by: Stefan Schmidt <stefan.schmidt@linaro.org> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Tested-by: Aleksandrs Vinarskis <alex.vinarskis@gmail.com> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250605-xps13-fingerprint-v2-1-eebf84c172f2@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.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.