[PATCH 1/2] mt7530: register OF node for internal MDIO bus

David Bauer
2023-04-30T11:29:21Z

The MT753x switches provide a switch-internal MDIO bus for the embedded
PHYs.

Register a OF sub-node on the switch OF-node for this internal MDIO bus.
This allows to configure the embedded PHYs using device-tree.

Signed-off-by: David Bauer <mail@david-bauer.net>
---
drivers/net/dsa/mt7530.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index c680873819b0..7e8ea5b75c3e 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2119,10 +2119,13 @@ mt7530_setup_mdio(struct mt7530_priv *priv)
{
struct dsa_switch *ds = priv->ds;
struct device *dev = priv->dev;
+ struct device_node *np, *mnp;
struct mii_bus *bus;
static int idx;
int ret;

+ np = priv->dev->of_node;
+
bus = devm_mdiobus_alloc(dev);
if (!bus)
return -ENOMEM;
@@ -2141,7 +2144,9 @@ mt7530_setup_mdio(struct mt7530_priv *priv)
if (priv->irq)
mt7530_setup_mdio_irq(priv);

- ret = devm_mdiobus_register(dev, bus);
+ mnp = of_get_child_by_name(np, "mdio");
+ ret = devm_of_mdiobus_register(dev, bus, mnp);
+ of_node_put(mnp);
if (ret) {
dev_err(dev, "failed to register MDIO bus: %d\n", ret);
if (priv->irq)
--
2.39.2