943bbe1de5
Andrew Lunn says: ==================== Raw PHY TDR data Some ethernet PHYs allow access to raw TDR data in addition to summary diagnostics information. Add support for retrieving this data via netlink ethtool. The basic structure in the core is the same as for normal phy diagnostics, the PHY driver simply uses different helpers to fill the netlink message with different data. There is a graphical tool under development, as well a ethtool(1) which can dump the data as text and JSON. A patched ethtool(1) can be found in https://github.com/lunn/ethtool.git feature/cable-test-v5 Thanks for Chris Healy for lots of testing. v2: See the individual patches but: Pass distances in centimeters, not meters Allow the PHY to round distances to what it supports and report what it actually used along with the results. Make the Marvell PHY use steps a multiple of 0.805 meters, its native step size. v3: Move the TDR configuration into a structure Add a range check on step Use NL_SET_ERR_MSG_ATTR() when appropriate Move TDR configuration into a nest Document attributes in the request Unsquash the last two patches ==================== 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.