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net: gem: Add support for more PHYs on MDIO bus

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@xilinx.com>
Michal Simek %!s(int64=8) %!d(string=hai) anos
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Modificáronse 1 ficheiros con 10 adicións e 0 borrados
  1. 10 0
      drivers/net/zynq_gem.c

+ 10 - 0
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);