[PATCH 16/19] net: airoha: bind MDIO controller on Ethernet load

[Mikhail Kshevetskiy]

From: Christian Marangi <ansuelsmth at gmail.com>

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 | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 1356ca36722..943305155c4 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -130,6 +130,7 @@ config AIROHA_ETH
 	select PHYLIB
 	select DM_ETH_PHY
 	select DM_RESET
+	select MDIO_MT7531_MMIO
 	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 a0644f63366..63f57d299ed 100644
--- a/drivers/net/airoha_eth.c
+++ b/drivers/net/airoha_eth.c
@@ -11,6 +11,7 @@
 #include <dm.h>
 #include <dm/device-internal.h>
 #include <dm/devres.h>
+#include <dm/lists.h>
 #include <mapmem.h>
 #include <miiphy.h>
 #include <net.h>
@@ -1203,12 +1204,38 @@ static int arht_eth_write_hwaddr(struct udevice *dev)
 
 static int airoha_eth_bind(struct udevice *dev)
 {
+	struct airoha_eth_soc_data *data = (void *)dev_get_driver_data(dev);
+	ofnode switch_node, mdio_node;
+	struct udevice *mdio_dev;
+	int ret;
+
 	/*
 	 * Force Probe as we set the Main ETH driver as misc
 	 * to register multiple eth port for each GDM
 	 */
 	dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND);
 
+	if (!CONFIG_IS_ENABLED(MDIO_MT7531_MMIO))
+		return 0;
+
+	switch_node = ofnode_by_compatible(ofnode_null(),
+					   data->switch_compatible);
+	if (!ofnode_valid(switch_node)) {
+		debug("Warning: missing switch node\n");
+		return 0;
+	}
+
+	mdio_node = ofnode_find_subnode(switch_node, "mdio");
+	if (!ofnode_valid(mdio_node)) {
+		debug("Warning: missing mdio node\n");
+		return 0;
+	}
+
+	ret = device_bind_driver_to_node(dev, "mt7531-mdio-mmio", "mdio",
+					 mdio_node, &mdio_dev);
+	if (ret)
+		debug("Warning: failed to bind mdio controller\n");
+
 	return 0;
 }
 
-- 
2.51.0