9003aacb9c
The px30-evb exposes uart2 through a uart-to-usb converter on the board but these pins are shared with the sdmmc controller. With both activated this results in a race condition depending in the probe order. Whichever of the two probes first will break the other peripheral. The px30-evb also exposes uart5 through pin its pin headers, so it's way saner to use these pins for serial output and keep the sdmmc working in all cases. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20190917082659.25549-7-heiko@sntech.de
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.