26dd2974c5
The ksz9477 DSA switch driver is currently updating some MMD registers on the internal port PHYs to address some chip errata. However, these errata are really a property of the PHY itself, not the switch they are part of, so this is kind of a layering violation. It makes more sense for these writes to be done inside the driver which binds to the PHY and not the driver for the containing device. This also addresses some issues where the ordering of when these writes are done may have been incorrect, causing the link to erratically fail to come up at the proper speed or at all. Doing this in the PHY driver during config_init ensures that they happen before anything else tries to change the state of the PHY on the port. The new code also ensures that autonegotiation is disabled during the register writes and re-enabled afterwards, as indicated by the latest version of the errata documentation from Microchip. Signed-off-by: Robert Hancock <robert.hancock@calian.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> 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 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.