[PATCH v1 2/2] net: arc: rockchip: fix emac mdio node support

[Andy Yan]

Hello Johan,
    Thanks for your patch.  Maybe we need a Fixes tag here?
    And for the patch itself:
  
   Tested-by: Andy Yan <andyshrk at 163.com>

At 2024-10-27 17:42:45, "Johan Jonker" <jbx6244 at gmail.com> wrote:
>The binding emac_rockchip.txt is converted to YAML.
>Changed against the original binding is an added MDIO subnode.
>Fix emac_mdio.c so that it can handle both old and new
>device trees.
>
>Signed-off-by: Johan Jonker <jbx6244 at gmail.com>
>---
> drivers/net/ethernet/arc/emac_mdio.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/net/ethernet/arc/emac_mdio.c b/drivers/net/ethernet/arc/emac_mdio.c
>index 87f40c2ba904..078b1a72c161 100644
>--- a/drivers/net/ethernet/arc/emac_mdio.c
>+++ b/drivers/net/ethernet/arc/emac_mdio.c
>@@ -133,6 +133,7 @@ int arc_mdio_probe(struct arc_emac_priv *priv)
> 	struct arc_emac_mdio_bus_data *data = &priv->bus_data;
> 	struct device_node *np = priv->dev->of_node;
> 	const char *name = "Synopsys MII Bus";
>+	struct device_node *mdio_node;
> 	struct mii_bus *bus;
> 	int error;
>
>@@ -164,7 +165,13 @@ int arc_mdio_probe(struct arc_emac_priv *priv)
>
> 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", bus->name);
>
>-	error = of_mdiobus_register(bus, priv->dev->of_node);
>+	/* Backwards compatibility for EMAC nodes without MDIO subnode. */
>+	mdio_node = of_get_child_by_name(np, "mdio");
>+	if (!mdio_node)
>+		mdio_node = of_node_get(np);
>+
>+	error = of_mdiobus_register(bus, mdio_node);
>+	of_node_put(mdio_node);
> 	if (error) {
> 		mdiobus_free(bus);
> 		return dev_err_probe(priv->dev, error,
>--
>2.39.2
>
>
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