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Dan Murphy says: ==================== Enable Fiber on DP83822 PHY The DP83822 Ethernet PHY has the ability to connect via a Fiber port. The derivative PHYs DP83825 and DP83826 do not have this ability. In fiber mode the DP83822 disables auto negotiation and has a fixed 100Mbps speed with support for full or half duplex modes. A devicetree binding was added to set the signal polarity for the fiber connection. This property is only applicable if the FX_EN strap is set in hardware other wise the signal loss detection is disabled on the PHY. If the FX_EN is not strapped the device can be configured to run in fiber mode via the device tree. All be it the PHY will not perform signal loss detection. v2 review from a long time ago can be found here - https://lore.kernel.org/patchwork/patch/1270958/ ==================== 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.