target/linux/generic/backport-5.15/789-v6.3-net-sfp-add-quirk-enabling-2500Base-x-for-HG-MXPD-48.patch

   1 From ad651d68cee75e9ac20002254c4e5d09ee67a84b Mon Sep 17 00:00:00 2001
   2 From: Daniel Golle <daniel@makrotopia.org>
   3 Date: Sun, 2 Apr 2023 12:44:37 +0100
   4 Subject: [PATCH] net: sfp: add quirk enabling 2500Base-x for HG MXPD-483II
   5
   6 The HG MXPD-483II 1310nm SFP module is meant to operate with 2500Base-X,
   7 however, in their EEPROM they incorrectly specify:
   8     Transceiver type                          : Ethernet: 1000BASE-LX
   9     ...
  10     BR, Nominal                               : 2600MBd
  11
  12 Use sfp_quirk_2500basex for this module to allow 2500Base-X mode anyway.
  13
  14 https://forum.banana-pi.org/t/bpi-r3-sfp-module-compatibility/14573/60
  15
  16 Reported-by: chowtom <chowtom@gmail.com>
  17 Tested-by: chowtom <chowtom@gmail.com>
  18 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  19 Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
  20 Signed-off-by: David S. Miller <davem@davemloft.net>
  21 ---
  22  drivers/net/phy/sfp.c | 4 ++++
  23  1 file changed, 4 insertions(+)
  24
  25 --- a/drivers/net/phy/sfp.c
  26 +++ b/drivers/net/phy/sfp.c
  27 @@ -372,6 +372,10 @@ static const struct sfp_quirk sfp_quirks
  28                 .part = "HL-GSFP",
  29                 .fixup = sfp_fixup_halny_gsfp,
  30         }, {
  31 +               .vendor = "HG GENUINE",
  32 +               .part = "MXPD-483II",
  33 +               .modes = sfp_quirk_2500basex,
  34 +       }, {
  35                 // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd
  36                 // NRZ in their EEPROM
  37                 .vendor = "HUAWEI",