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In order for us to support a PCS device we need to add an MDIO bus to allow the drivers to have access to the registers for the device. This change adds such an interface. The interface will consist of 2 PHY addrs, the first one consisting of a PMD and PCS, and the second just being a PCS. There is a need for 2 PHYs addrs due to the fact that in order to support the 50GBase-CR2 mode we will need to access and configure the PCS vendor registers and RSFEC registers from the second lane identical to the first. Signed-off-by: Alexander Duyck <alexanderduyck@fb.com> Link: https://patch.msgid.link/176374324532.959489.15389723111560978054.stgit@ahduyck-xeon-server.home.arpa Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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.