netdev - [PATCH net-next] net: sfp: add quirk for Lantech 8330-265D

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Message-ID: <20260128170044.15576-1-kabel@kernel.org>
Date: Wed, 28 Jan 2026 18:00:44 +0100
From: Marek Behún <kabel@...nel.org>
To: netdev@...r.kernel.org,
	Russell King <linux@...linux.org.uk>
Cc: Paolo Abeni <pabeni@...hat.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Marek Behún <kabel@...nel.org>
Subject: [PATCH net-next] net: sfp: add quirk for Lantech 8330-265D

Similar to Lantech 8330-262D-E, the Lantech 8330-265D also reports
2500MBd instead of 3125MBd.

Also, all 8330-265D report normal RX_LOS in EEPROM, but some signal
inverted RX_LOS. We therefore need to ignore RX_LOS on these modules.

Signed-off-by: Marek Behún <kabel@...nel.org>
---
 drivers/net/phy/sfp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 47f095bd91ce..4746a8af3a8d 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -530,9 +530,13 @@ static const struct sfp_quirk sfp_quirks[] = {
 	SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex,
 		  sfp_fixup_ignore_tx_fault),
 
-	// Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report
-	// 2500MBd NRZ in their EEPROM
+	// Lantech 8330-262D-E and 8330-265D can operate at 2500base-X, but
+	// incorrectly report 2500MBd NRZ in their EEPROM.
+	// Some 8330-265D modules have inverted LOS, while all of them report
+	// normal LOS in EEPROM. Therefore we need to ignore LOS entirely.
 	SFP_QUIRK_S("Lantech", "8330-262D-E", sfp_quirk_2500basex),
+	SFP_QUIRK("Lantech", "8330-265D", sfp_quirk_2500basex,
+		  sfp_fixup_ignore_los),
 
 	SFP_QUIRK_S("UBNT", "UF-INSTANT", sfp_quirk_ubnt_uf_instant),
 
-- 
2.52.0