net: sfp: add quirk for FS's 2.5G copper SFP

[ Upstream commit e27aca3760c08b7b05aea71068bd609aa93e7b35 ]

Add a quirk for a copper SFP that identifies itself as "FS" "SFP-2.5G-T".
This module's PHY is inaccessible, and can only run at 2500base-X with the
host without negotiation. Add a quirk to enable the 2500base-X interface mode
with 2500base-T support and disable auto negotiation.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Link: https://lore.kernel.org/r/20230925080059.266240-1-Raju.Lakkaraju@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index a50038a4525073b02b6ca74ff0dab9f323d41f04..3679a43f4eb024d9ee605a5ed0fac6f84543a983 100644 (file)
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -468,6 +468,9 @@ static const struct sfp_quirk sfp_quirks[] = {
        SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex,
                  sfp_fixup_ignore_tx_fault),
 
+       // FS 2.5G Base-T
+       SFP_QUIRK_M("FS", "SFP-2.5G-T", sfp_quirk_oem_2_5g),
+
        // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report
        // 2500MBd NRZ in their EEPROM
        SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex),