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222ef7050b1f013b38d7272258383c83e94e834e
Ethernet cables with faulty or missing pairs (specifically pairs C and D) allow auto-negotiation to 1000Mbs, but do not support the successful establishment of a link. Add a DT property, "microchip,downshift-after", to configure the number of auto-negotiation failures after which it falls back to 100Mbs. Valid values are 2, 3, 4, 5 and 0, where 0 means never downshift. Signed-off-by: Phil Elwell <phil@raspberrypi.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.
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