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Each ENETC has a set of external MDIO registers to access its external PHY based on its port EMDIO bus, these registers are used for MDIO bus access, such as setting the PHY address, PHY register address and value, read or write operations, C22 or C45 format, etc. The base address of this set of registers has been modified in ENETC v4 and is different from that in ENETC v1. So the base address needs to be updated so that ENETC v4 can use port MDIO to manage its own external PHY. Additionally, if ENETC has the PCS layer, it also has a set of internal MDIO registers for managing its on-die PHY (PCS/Serdes). The base address of this set of registers is also different from that of ENETC v1, so the base address also needs to be updated so that ENETC v4 can support the management of on-die PHY through the internal MDIO bus. Signed-off-by: Wei Fang <wei.fang@nxp.com> Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com> Link: https://patch.msgid.link/20251119102557.1041881-4-wei.fang@nxp.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 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.