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4ef027d5a3
This adds debugfs interface that can be used for debugging possible hardware/software issues. It currently exposes the following debugfs entries for each SPI device probed: /sys/kernel/debug/pi433/<DEVICE>/regs ... The 'regs' file contains all rf69 uC registers values that are useful for troubleshooting misconfigurations between 2 devices. It contains one register per line so it should be easy to use normal filtering tools to find the registers of interest if needed. Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@gmail.com> Link: https://lore.kernel.org/r/YfzeEHJcd+qvYGZ8@mail.google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.