Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Pawel Dembicki <> | Subject | [PATCH net-next v3 2/3] net: ethtool: Add impedance mismatch result code to cable test | Date | Tue, 2 Apr 2024 22:11:19 +0200 |
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Some PHYs can recognize during a cable test if the impedance in the cable is okay. They can detect reflections caused by impedance discontinuity between a regular 100 Ohm cable and an abnormal part with a higher or lower impedance.
This commit introduces a new result code: ETHTOOL_A_CABLE_RESULT_CODE_IMPEDANCE_MISMATCH, which represents the results of a cable test indicating issues with impedance integrity.
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com> --- v3: - added enum description - improve commit message v2: - introduce patch
include/uapi/linux/ethtool_netlink.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 3f89074aa06c..accbb1a231df 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -515,6 +515,10 @@ enum { ETHTOOL_A_CABLE_RESULT_CODE_OPEN, ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT, ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT, + /* detected reflection caused by the impedance discontinuity between + * a regular 100 Ohm cable and a part with the abnormal impedance value + */ + ETHTOOL_A_CABLE_RESULT_CODE_IMPEDANCE_MISMATCH, }; enum { -- 2.25.1
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