问题现象：
PHY芯片用的IP101GR，kernel已经根据手册把phy 驱动icplus等都添加了。不知道是不是硬件有问题，量了PE10（ephy_25M）没有时钟信号。
原理图与全志开源社区V853的一致，
gmac_pins_a: gmac@0 {
pins = "PE0", "PE1", "PE2", "PE3",
"PE4", "PE5", "PE6", "PE7",
"PE8", "PE9";
function = "gmac0";
drive-strength = <10>;
};
开机与网络有关的只有这些，ifconfig -a是有eth0网卡的
[ 0.863954] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pe not found, using dummy regulator
[ 0.875201] sunxi gmac driver's version: 1.0.0
[ 0.880315] gmac-power0: NULL
[ 0.883664] gmac-power1: NULL
[ 0.886967] gmac-power2: NULL
root@TinaLinux:/# ifconfig eth0 192.168.2.1
[ 34.543389] libphy: 4500000.eth: probed
[ 34.547686] sunxi-gmac 4500000.eth eth0: No PHY found!
[ 34.703390] libphy: 4500000.eth: probed
[ 34.707685] sunxi-gmac 4500000.eth eth0: No PHY found!
[ 34.716027] sunxi-gmac 4500000.eth eth0: phy init failed
ifconfig: SIOCSIFFLAGS: Invalid argument
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