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    Subject[PATCH net-next] net: sfp: add 2500base-X quirk for Lantech SFP module
    Date
    The Lantech 8330-262D-E module is 2500base-X capable, but it reports the
    nominal bitrate as 2500MBd instead of 3125MBd. Add a quirk for the
    module.

    The following in an EEPROM dump of such a SFP with the serial number
    redacted:

    00: 03 04 07 00 00 00 01 20 40 0c 05 01 19 00 00 00 ???...? @????...
    10: 1e 0f 00 00 4c 61 6e 74 65 63 68 20 20 20 20 20 ??..Lantech
    20: 20 20 20 20 00 00 00 00 38 33 33 30 2d 32 36 32 ....8330-262
    30: 44 2d 45 20 20 20 20 20 56 31 2e 30 03 52 00 cb D-E V1.0?R.?
    40: 00 1a 00 00 46 43 XX XX XX XX XX XX XX XX XX XX .?..FCXXXXXXXXXX
    50: 20 20 20 20 32 32 30 32 31 34 20 20 68 b0 01 98 220214 h???
    60: 45 58 54 52 45 4d 45 4c 59 20 43 4f 4d 50 41 54 EXTREMELY COMPAT
    70: 49 42 4c 45 20 20 20 20 20 20 20 20 20 20 20 20 IBLE

    Signed-off-by: Michael Walle <michael@walle.cc>
    ---
    drivers/net/phy/sfp-bus.c | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
    index c1512c9925a6..15aa5ac1ff49 100644
    --- a/drivers/net/phy/sfp-bus.c
    +++ b/drivers/net/phy/sfp-bus.c
    @@ -74,6 +74,12 @@ static const struct sfp_quirk sfp_quirks[] = {
    .vendor = "HUAWEI",
    .part = "MA5671A",
    .modes = sfp_quirk_2500basex,
    + }, {
    + // Lantech 8330-262D-E can operate at 2500base-X, but
    + // incorrectly report 2500MBd NRZ in their EEPROM
    + .vendor = "Lantech",
    + .part = "8330-262D-E",
    + .modes = sfp_quirk_2500basex,
    }, {
    .vendor = "UBNT",
    .part = "UF-INSTANT",
    --
    2.30.2
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