各位好，遇到一个问题：petalinux 2019.2，zynq7010，通过gmii_to_rgmii 连接挂外EMIO管脚上的PHY，kernel启动没有识别PHY的动作。

在非linux环境下测试过网络是OK的，u-boot下也能够正常识别phy id，但是linux内核启动整个过程到外部PHY的MDIO总线上都没有任何读写的动作(示波器观测的)，启动log如下：

U-Boot 2019.01 (Dec 16 2019 - 12:14:00 +0000) Xilinx Zynq ZC702

CPU: Zynq 7z010

Silicon: v3.1

DRAM: ECC disabled 256 MiB

NAND: 128 MiB

MMC: mmc@e0100000: 0

Loading Environment from FAT... OK

In: serial@e0001000

Out: serial@e0001000

Err: serial@e0001000

Net: ZYNQ GEM: e000b000, phyaddr 0, interface rgmii-id

eth0: ethernet@e000b000

Hit any key to stop autoboot: 0

Device: mmc@e0100000

Manufacturer ID: 1b

OEM: 534d

Name: 00000

Bus Speed: 50000000

Mode : SD High Speed (50MHz)

Rd Block Len: 512

SD version 3.0

。。。。

dma-pl330 f8003000.dmac: DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16

brd: module loaded

loop: module loaded

libphy: Fixed MDIO Bus: probed

CAN device driver interface

libphy: MACB_mii_bus: probed

xgmiitorgmii e000b000.ethernet-ffffffff:08: Couldn't find phydev

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

ehci-pci: EHCI PCI platform driver

usbcore: registered new interface driver usb-storage

i2c /dev entries driver

。。。

看起来好像gmii2rgmii都没有正常挂载上？

pcw.dtsi中描述如下：

&gem0 {

phy-handle = ;        //这里尝试过改成

phy-mode = "gmii";              //这里也尝试过改成"rgmii"和“rgmii-id”

status = "okay";

xlnx,ptp-enet-clock = <0x69f6bcb>;

ps7_ethernet_0_mdio: mdio {

#address-cells = <1>;

#size-cells = <0>;

gmii_to_rgmii_0: gmii_to_rgmii_0@8 {

compatible = "xlnx,gmii-to-rgmii-1.0";

phy-handle = ;

reg = <8>;

};

phy1: phy@0 {

device_type = "ethernet-phy";

reg = <0>;

};

};

};

其中rgmii2gmii的phy地址，vivado中确认过确为8。

实在没招了，请指点下.