netdev - [PATCH net-next] net: sfp: add quirk for 2.5G OEM BX SFP

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Message-ID: <96223803-95a8-4879-8a26-bc13b66a6e6b@birger-koblitz.de>
Date: Sun, 9 Feb 2025 12:01:55 +0100
From: Birger Koblitz <mail@...ger-koblitz.de>
To: netdev@...r.kernel.org
Cc: Daniel Golle <daniel@...rotopia.org>, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next] net: sfp: add quirk for 2.5G OEM BX SFP

The OEM SFP-2.5G-BX10-D/U SFP module pair is meant to operate with
2500Base-X. However, in their EEPROM they incorrectly specify:
Transceiver codes   : 0x00 0x12 0x00 0x00 0x12 0x00 0x01 0x05 0x00
BR, Nominal         : 2500MBd

Use sfp_quirk_2500basex for this module to allow 2500Base-X mode anyway.
Run-tested on BananaPi R3.

Signed-off-by: Birger Koblitz <mail@...ger-koblitz.de>
---
  drivers/net/phy/sfp.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 7dbcbf0a4ee2..9369f5297769 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -515,6 +515,8 @@ static const struct sfp_quirk sfp_quirks[] = {
   	SFP_QUIRK_F("OEM", "SFP-10G-T", sfp_fixup_rollball_cc),
  	SFP_QUIRK_M("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g),
+	SFP_QUIRK_M("OEM", "SFP-2.5G-BX10-D", sfp_quirk_2500basex),
+	SFP_QUIRK_M("OEM", "SFP-2.5G-BX10-U", sfp_quirk_2500basex),
  	SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc),
  	SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc),
  	SFP_QUIRK_F("Turris", "RTSFP-2.5G", sfp_fixup_rollball),
-- 
2.39.5