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Marc Zyngier
fddd408ad4
The validity of the ftdi CBUS GPIO is pretty hidden so far, and finding out *why* some GPIOs don't work is sometimes hard to identify. So let's help the user by displaying the map of the CBUS pins that are valid for a GPIO. Suggested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20201204164739.781812-4-maz@kernel.org Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> [johan: demote to KERN_DEBUG, rephrase messages, drop ftx-prog warning] Signed-off-by: Johan Hovold <johan@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 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.