[PATCH] net: gem: Add support for more PHYs on MDIO bus

[Michal Simek]

Find out MDIO bus and enable MDIO access to it if this is done via
different GEM controller. Only works across GEM instances.

Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 drivers/net/zynq_gem.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c
index da4b6fba9ff6..8afec8bbfcff 100644
--- a/drivers/net/zynq_gem.c
+++ b/drivers/net/zynq_gem.c
@@ -758,6 +758,9 @@ static int zynq_gem_ofdata_to_platdata(struct udevice *dev)
 
 	if (!dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
 					&phandle_args)) {
+		fdt_addr_t addr;
+		ofnode parent;
+
 		debug("phy-handle does exist %s\n", dev->name);
 		priv->phyaddr = ofnode_read_u32_default(phandle_args.node,
 							"reg", -1);
@@ -765,6 +768,13 @@ static int zynq_gem_ofdata_to_platdata(struct udevice *dev)
 		priv->max_speed = ofnode_read_u32_default(phandle_args.node,
 							  "max-speed",
 							  SPEED_1000);
+
+		parent = ofnode_get_parent(phandle_args.node);
+		addr = ofnode_get_addr(parent);
+		if (addr != FDT_ADDR_T_NONE) {
+			debug("MDIO bus not found %s\n", dev->name);
+			priv->mdiobase = (struct zynq_gem_regs *)addr;
+		}
 	}
 
 	phy_mode = dev_read_prop(dev, "phy-mode", NULL);
-- 
2.28.0