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The user ports use RSGMII, but we don't have that, and DT doesn't specify a phy interface mode, so phylib defaults to GMII. These support 1G, 100M and 10M with flow control. It is unknown whether asymetric pause is supported at all speeds. The CPU port uses MII/GMII/RGMII/REVMII by hardware pin strapping, and support speeds specific to each, with full duplex only supported in some modes. Flow control may be supported again by hardware pin strapping, and theoretically is readable through a register but no information is given in the datasheet for that. So, we do a best efforts - and be lenient. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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.