zynqmp pl端eth phy选用ar8035

zynqmp pl选用 ar8035

zynqmp的ps端链接ar8035phy时只需要更改dts，增加rgmii-id的方式即可

&gem0 {
	status = "okay";
	local-mac-address = [00 00 12 34 56 70];
	phy-handle = <&phy1>;
	phy-mode = "rgmii-id";
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_gem0_default>;
	phy1: phy@4 {
		reg = <4>;
	};
};

但是如果通过pl的axi eth tri mode链接ar8035时，只更改此项是不可以的，通过内核部分的打印，和查看内核的源码很容易就可以看到 axi的驱动并没有增加delay的支持
因此需要更改内核代码
在xilinx_axienet_mdio.c中的axienet_mdio_setup函数添加
实际上就是调整phy侧的delay来适应，4是我的板子上的phy addr

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c b/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c
index 55c0ea9..4d9bbb8 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c
@@ -72,6 +72,8 @@ static int axienet_mdio_read(struct mii_bus *bus, int phy_id, int reg)
        dev_dbg(lp->dev, "axienet_mdio_read(phy_id=%i, reg=%x) == %x\n",
                phy_id, reg, rc);
 
+       printk("axienet_mdio_read(phy_id=%i, reg=%x) == %x\n",
+               phy_id, reg, rc);
        return rc;
 }
 
@@ -96,7 +98,8 @@ static int axienet_mdio_write(struct mii_bus *bus, int phy_id, int reg,
 
        dev_dbg(lp->dev, "axienet_mdio_write(phy_id=%i, reg=%x, val=%x)\n",
                phy_id, reg, val);
-
+       printk("axienet_mdio_write(phy_id=%i, reg=%x, val=%x)\n",
+               phy_id, reg, val);
        ret = axienet_mdio_wait_until_ready(lp);
        if (ret < 0)
                return ret;
@@ -222,6 +225,16 @@ int axienet_mdio_setup(struct axienet_local *lp, struct device_node *np)
        lp->mii_bus = bus;
 
        ret = of_mdiobus_register(bus, np1);
+
+       printk("axienet_mdio_setup in \r\n");
+
+       axienet_mdio_read(bus, 4, 0x1d);
+       axienet_mdio_write(bus, 4, 0x1d, 0x0b);
+       axienet_mdio_read(bus, 4, 0x1d);
+       axienet_mdio_read(bus, 4, 0x1e);
+       axienet_mdio_write(bus, 4, 0x1e, 0xbc00);
+       axienet_mdio_read(bus, 4, 0x1e);
+
        if (ret) {
                mdiobus_free(bus);
                lp->mii_bus = NULL;

重新 build 上板，调试通过