ethtool: add support for ETHTOOL_A_CABLE_FAULT_LENGTH_SRC and ETHTOOL_A_CABLE_RESULT_SRC
Extend cable test output to include source information, supporting
diagnostic technologies like TDR (Time Domain Reflectometry) and ALCD
(Active Link Cable Diagnostic). The source is displayed optionally at
the end of each result or fault length line.
TDR requires interrupting the active link to measure parameters like
fault location, while ALCD can operate on an active link to provide
details like cable length without disruption.
Example output:
Pair B code Open Circuit, source: TDR
Pair B, fault length: 8.00m, source: TDR
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
2 files changed
