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| author | Jan Hoffmann <jan@3e8.eu> | 2026-03-29 22:11:11 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-31 02:27:44 +0300 |
| commit | 911e2c050963ccf239faec6ae9dee0f5e8f1cc5c (patch) | |
| tree | c57728091c9cdd9702bd000cf647007d5efc2af5 | |
| parent | cf0d9080c6f795bc6be08babbffa29b62c06e9b0 (diff) | |
| download | linux-911e2c050963ccf239faec6ae9dee0f5e8f1cc5c.tar.xz | |
net: sfp: add quirk for ZOERAX SFP-2.5G-T
This is a 2.5G copper module which appears to be based on a Motorcomm
YT8821 PHY. There doesn't seem to be a usable way to to access the PHY
(I2C address 0x56 provides only read-only C22 access, and Rollball is
also not working).
The module does not report the correct extended compliance code for
2.5GBase-T, and instead claims to support SONET OC-48 and Fibre Channel:
Identifier : 0x03 (SFP)
Extended identifier : 0x04 (GBIC/SFP defined by 2-wire interface ID)
Connector : 0x07 (LC)
Transceiver codes : 0x00 0x01 0x00 0x00 0x40 0x40 0x04 0x00 0x00
Transceiver type : FC: Multimode, 50um (M5)
Encoding : 0x05 (SONET Scrambled)
BR Nominal : 2500MBd
Despite this, the kernel still enables the correct 2500Base-X interface
mode. However, for the module to actually work, it is also necessary to
disable inband auto-negotiation.
Enable the existing "sfp_quirk_oem_2_5g" for this module, which handles
that and also sets the bit for 2500Base-T link mode.
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20260329191304.720160-1-jan@3e8.eu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/phy/sfp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 5db841377199..0a455a2daccb 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -567,6 +567,8 @@ static const struct sfp_quirk sfp_quirks[] = { SFP_QUIRK_F("Turris", "RTSFP-2.5G", sfp_fixup_rollball), SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball), SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball), + + SFP_QUIRK_S("ZOERAX", "SFP-2.5G-T", sfp_quirk_oem_2_5g), }; static size_t sfp_strlen(const char *str, size_t maxlen) |