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5c61db08d9
SGMII mode does not require port-speed to be specified; this only switches SGMII to use the MAC configuration register speed settings and the actual value is irrelevant when the link comes up. As it seems the intention was to support "reverse SGMII" with this setting, but the code didn't actually configure that due to a typo, the warning and bad DT binding documentation has led people to specify snps,ps-speed in their DT files inappropriately. If mac_port_sel_speed is zero, then don't complain that the speed is invalid, as this means we're using "normal" SGMII. This does _not_ obsolete snps,ps-speed, nor does it change the behaviour of that property, with the exception of not making people mistakenly believe that they need to specify this option to use normal SGMII. There is no need to modify the binding. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://patch.msgid.link/E1v9P6n-0000000Aom9-2LuZ@rmk-PC.armlinux.org.uk Signed-off-by: Jakub Kicinski <kuba@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 reStructuredText 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.