[RFC PATCH 2/5] net: airoha: bind MDIO controller on Ethernet load

[Christian Marangi]

Bind MDIO controller on Ethernet Controller load. The Airoha AN7581 SoC
have an integrated Switch based on MT7531 (or more saying MT7988).

Attach it to the switch node to support scanning for MDIO devices on the
BUS.

Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 drivers/net/Kconfig      |  1 +
 drivers/net/airoha_eth.c | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 9ac9bee46c9..f7ea12f9b37 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -126,6 +126,7 @@ config AIROHA_ETH
 	depends on ARCH_AIROHA
 	select PHYLIB
 	select DM_RESET
+	select MDIO_MT7531
 	help
 	  This Driver support Airoha Ethernet QDMA Driver
 	  Say Y to enable support for the Airoha Ethernet QDMA.
diff --git a/drivers/net/airoha_eth.c b/drivers/net/airoha_eth.c
index 6588eb3a806..6be6ec2845b 100644
--- a/drivers/net/airoha_eth.c
+++ b/drivers/net/airoha_eth.c
@@ -971,6 +971,31 @@ static int arht_eth_write_hwaddr(struct udevice *dev)
 	return 0;
 }
 
+static int airoha_eth_bind(struct udevice *dev)
+{
+	struct airoha_eth_soc_data *data = (void *)dev_get_driver_data(dev);
+	struct udevice *mdio_dev;
+	ofnode switch_node;
+	int ret = 0;
+
+	if (!CONFIG_IS_ENABLED(MDIO_MT7531))
+		return 0;
+
+	switch_node = ofnode_by_compatible(ofnode_null(),
+					   "airoha,en7581-switch");
+	if (!ofnode_valid(switch_node)) {
+		debug("Warning: missing switch node\n");
+		return 0;
+	}
+
+	ret = device_bind_driver_to_node(dev, "mt7531-mdio", "mdio",
+					 switch_node, &mdio_dev);
+	if (ret)
+		debug("Warning: failed to bind mdio controller\n");
+
+	return 0;
+}
+
 static const struct udevice_id airoha_eth_ids[] = {
 	{ .compatible = "airoha,en7581-eth" },
 	{ }
@@ -990,6 +1015,7 @@ U_BOOT_DRIVER(airoha_eth) = {
 	.id = UCLASS_ETH,
 	.of_match = airoha_eth_ids,
 	.probe = airoha_eth_probe,
+	.bind = airoha_eth_bind,
 	.ops = &airoha_eth_ops,
 	.priv_auto = sizeof(struct airoha_eth),
 	.plat_auto = sizeof(struct eth_pdata),
-- 
2.50.0