From 4d98bb0d7ec2d0b417df6207b0bafe1868bad9f8 Mon Sep 17 00:00:00 2001 From: Sean Anderson Date: Fri, 22 Oct 2021 12:35:48 -0400 Subject: [PATCH] net: macb: Use mdio child node for MDIO bus if it exists This allows explicitly specifying which children are present on the mdio bus. Additionally, it allows for non-phy MDIO devices on the bus. Signed-off-by: Sean Anderson Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/ethernet/cadence/macb_main.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 029dea2873e3..30a65cac9e87 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -898,6 +898,17 @@ static int macb_mdiobus_register(struct macb *bp) { struct device_node *child, *np = bp->pdev->dev.of_node; + /* If we have a child named mdio, probe it instead of looking for PHYs + * directly under the MAC node + */ + child = of_get_child_by_name(np, "mdio"); + if (np) { + int ret = of_mdiobus_register(bp->mii_bus, child); + + of_node_put(child); + return ret; + } + if (of_phy_is_fixed_link(np)) return mdiobus_register(bp->mii_bus); -- 2.11.0