net: sfp: add quirk enabling 2500Base-x for HG MXPD-483II

The HG MXPD-483II 1310nm SFP module is meant to operate with 2500Base-X,
however, in their EEPROM they incorrectly specify:
    Transceiver type                          : Ethernet: 1000BASE-LX
    ...
    BR, Nominal                               : 2600MBd

Use sfp_quirk_2500basex for this module to allow 2500Base-X mode anyway.

https://forum.banana-pi.org/t/bpi-r3-sfp-module-compatibility/14573/60

Reported-by: chowtom <chowtom@gmail.com>
Tested-by: chowtom <chowtom@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index fb98db6..8af10bb 100644 (file)
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -387,6 +387,10 @@ static const struct sfp_quirk sfp_quirks[] = {
 
        SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp),
 
+       // HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports
+       // 2600MBd in their EERPOM
+       SFP_QUIRK_M("HG GENUINE", "MXPD-483II", sfp_quirk_2500basex),
+
        // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd NRZ in
        // their EEPROM
        SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex,