diff options
| author | Nicolai Buchwitz <nb@tipi-net.de> | 2026-04-01 14:38:44 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-04-02 18:03:03 -0700 |
| commit | e417ac73d24ae68b8dd6a1b02f9db03a7a5c184b (patch) | |
| tree | d17f8163416485286053d65e1f6f6a0d911a1bb6 /tools/testing/vma/include/git@git.tavy.me:linux.git | |
| parent | 86f5dd4e0ff282a0acf1f058e947fd5f4ba58a9d (diff) | |
net: phy: microchip: add downshift tunable support for LAN88xx
Implement the standard ETHTOOL_PHY_DOWNSHIFT tunable for the LAN88xx
PHY. This allows runtime configuration of the auto-downshift feature
via ethtool:
ethtool --set-phy-tunable eth0 downshift on count 3
The LAN88xx PHY supports downshifting from 1000BASE-T to 100BASE-TX
after 2-5 failed auto-negotiation attempts. Valid count values are
2, 3, 4 and 5.
This is based on an earlier downstream implementation by Phil Elwell.
Signed-off-by: Nicolai Buchwitz <nb@tipi-net.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20260401123848.696766-2-nb@tipi-net.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/testing/vma/include/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions