[PATCH 1/3] net: xilinx: axi_emac: Use shared MDIO bus support for axi emac driver

[Michal Simek]

From: T Karthik Reddy <t.karthik.reddy at xilinx.com>

CONFIG_DM_ETH_PHY enables support to utilize generic ethernet phy
framework. Though if ethernet PHY node is in other ethernet node, it
will use shared MDIO to access the PHY of other ethernet. Move ethernet
print info statement from plat function to probe function, as phyaddr is
not enumerated when CONFIG_DM_ETH_PHY is enabled.

Signed-off-by: T Karthik Reddy <t.karthik.reddy at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at amd.com>
---

 drivers/net/xilinx_axi_emac.c | 38 ++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 12 deletions(-)

diff --git a/drivers/net/xilinx_axi_emac.c b/drivers/net/xilinx_axi_emac.c
index a4715735c3c4..04277b1269f3 100644
--- a/drivers/net/xilinx_axi_emac.c
+++ b/drivers/net/xilinx_axi_emac.c
@@ -19,6 +19,7 @@
 #include <miiphy.h>
 #include <wait_bit.h>
 #include <linux/delay.h>
+#include <eth_phy.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -295,6 +296,9 @@ static int axiemac_phy_init(struct udevice *dev)
 	/* Set default MDIO divisor */
 	writel(XAE_MDIO_DIV_DFT | XAE_MDIO_MC_MDIOEN_MASK, &regs->mdio_mc);
 
+	if (IS_ENABLED(CONFIG_DM_ETH_PHY))
+		priv->phyaddr = eth_phy_get_addr(dev);
+
 	if (priv->phyaddr == -1) {
 		/* Detect the PHY address */
 		for (i = 31; i >= 0; i--) {
@@ -778,18 +782,29 @@ static int axi_emac_probe(struct udevice *dev)
 		priv->phy_of_handle = plat->phy_of_handle;
 		priv->interface = pdata->phy_interface;
 
-		priv->bus = mdio_alloc();
-		priv->bus->read = axiemac_miiphy_read;
-		priv->bus->write = axiemac_miiphy_write;
-		priv->bus->priv = priv;
+		if (IS_ENABLED(CONFIG_DM_ETH_PHY))
+			priv->bus = eth_phy_get_mdio_bus(dev);
 
-		ret = mdio_register_seq(priv->bus, dev_seq(dev));
-		if (ret)
-			return ret;
+		if (!priv->bus) {
+			priv->bus = mdio_alloc();
+			priv->bus->read = axiemac_miiphy_read;
+			priv->bus->write = axiemac_miiphy_write;
+			priv->bus->priv = priv;
+
+			ret = mdio_register_seq(priv->bus, dev_seq(dev));
+			if (ret)
+				return ret;
+		}
+
+		if (IS_ENABLED(CONFIG_DM_ETH_PHY))
+			eth_phy_set_mdio_bus(dev, priv->bus);
 
 		axiemac_phy_init(dev);
 	}
 
+	printf("AXI EMAC: %lx, phyaddr %d, interface %s\n", (ulong)pdata->iobase,
+	       priv->phyaddr, phy_string_for_interface(pdata->phy_interface));
+
 	return 0;
 }
 
@@ -844,8 +859,10 @@ static int axi_emac_of_to_plat(struct udevice *dev)
 		offset = fdtdec_lookup_phandle(gd->fdt_blob, node,
 					       "phy-handle");
 		if (offset > 0) {
-			plat->phyaddr = fdtdec_get_int(gd->fdt_blob, offset,
-						       "reg", -1);
+			if (!(IS_ENABLED(CONFIG_DM_ETH_PHY)))
+				plat->phyaddr = fdtdec_get_int(gd->fdt_blob,
+							       offset,
+							       "reg", -1);
 			plat->phy_of_handle = offset;
 		}
 
@@ -857,9 +874,6 @@ static int axi_emac_of_to_plat(struct udevice *dev)
 						     "xlnx,eth-hasnobuf");
 	}
 
-	printf("AXI EMAC: %lx, phyaddr %d, interface %s\n", (ulong)pdata->iobase,
-	       plat->phyaddr, phy_string_for_interface(pdata->phy_interface));
-
 	return 0;
 }
 
-- 
2.36.0