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| author | Fidelio Lawson <lawson.fidelio@gmail.com> | 2026-06-09 18:19:56 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-06-11 15:47:56 -0700 |
| commit | 13655144ddcad532c4e9338788041654a54e5c2f (patch) | |
| tree | bab0d2b81e301cd40ff6104cbe5ecc7e78e800ff /include/uapi | |
| parent | 014f0c98cf1d9dd82c3b322fd77fa124aca03c21 (diff) | |
| download | lwn-13655144ddcad532c4e9338788041654a54e5c2f.tar.gz lwn-13655144ddcad532c4e9338788041654a54e5c2f.zip | |
net: ethtool: add KSZ87xx low-loss cable PHY tunables
Introduce vendor-specific PHY tunable identifiers to control the
KSZ87xx low-loss cable erratum handling through the ethtool PHY
tunable interface.
The following tunables are added:
- a boolean "short-cable" tunable, applying a documented and
conservative preset intended for short or low-loss Ethernet cables;
- an integer LPF bandwidth tunable, allowing advanced adjustment of the
receiver low-pass filter bandwidth;
- an integer DSP EQ initial value tunable, allowing advanced tuning of
the PHY equalizer initialization.
The actual behavior is implemented by the corresponding PHY and switch
drivers.
Reviewed-by: Marek Vasut <marex@nabladev.com>
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Signed-off-by: Fidelio Lawson <fidelio.lawson@exotec.com>
Link: https://patch.msgid.link/20260609-ksz87xx_errata_low_loss_connections-v10-2-9ba4418cf3db@exotec.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/ethtool.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 1cdfb8341df2..a2091d4e00f3 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -291,6 +291,9 @@ enum phy_tunable_id { ETHTOOL_PHY_DOWNSHIFT, ETHTOOL_PHY_FAST_LINK_DOWN, ETHTOOL_PHY_EDPD, + ETHTOOL_PHY_SHORT_CABLE_PRESET, + ETHTOOL_PHY_LPF_BW, + ETHTOOL_PHY_DSP_EQ_INIT_VALUE, /* * Add your fresh new phy tunable attribute above and remember to update * phy_tunable_strings[] in net/ethtool/common.c |