diff mbox series

[net-next,v5,6/7] net: tn40xx: prepare tn40xx driver to find phy of the TN9510 card

Message ID 20250222-tn9510-v3a-v5-6-99365047e309@gmx.net (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series net: tn40xx: add support for AQR105 based cards | expand

Commit Message

Hans-Frieder Vogt via B4 Relay Feb. 22, 2025, 9:49 a.m. UTC 
From: Hans-Frieder Vogt <hfdevel@gmx.net>

Prepare the tn40xx driver to load for Tehuti TN9510 cards, which require
bit 3 in the register TN40_REG_MDIO_CMD_STAT to be set. The function of bit
3 is unclear, but may have something to do with the length of the preamble
in the MDIO communication. If bit 3 is not set, the PHY will not be found
when performing a scan for PHYs. Use the available tn40_mdio_set_speed
function which includes setting bit 3. Just move the function to before the
devm_mdio_register function, which scans the mdio bus for PHYs.

Signed-off-by: Hans-Frieder Vogt <hfdevel@gmx.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
---
 drivers/net/ethernet/tehuti/tn40_mdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/tehuti/tn40_mdio.c b/drivers/net/ethernet/tehuti/tn40_mdio.c
index 173551ace1941bf825c9b3d1acd16be24b35eb84..f08e6d5cf2bb0091e209214ef6aca186503c48de 100644
--- a/drivers/net/ethernet/tehuti/tn40_mdio.c
+++ b/drivers/net/ethernet/tehuti/tn40_mdio.c
@@ -199,13 +199,13 @@  int tn40_mdiobus_init(struct tn40_priv *priv)
 		}
 	}
 
+	tn40_mdio_set_speed(priv, TN40_MDIO_SPEED_6MHZ);
 	ret = devm_mdiobus_register(&pdev->dev, bus);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register mdiobus %d %u %u\n",
 			ret, bus->state, MDIOBUS_UNREGISTERED);
 		goto err_swnodes_cleanup;
 	}
-	tn40_mdio_set_speed(priv, TN40_MDIO_SPEED_6MHZ);
 	return 0;
 
 err_swnodes_cleanup: