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imx6ull dual lan8720a cannot use fec1

Question asked by Mingyang Liu on Oct 24, 2018
Latest reply on Nov 8, 2018 by Mingyang Liu

My board is imx6ull with two lan8720a phy.The dts file i have modified for two weeks but still cannot use the second ethernet phy.But sometime it work well for both two ethernet phy.

I have checked the clk pin.It output 50Mhz pwm.

the reset pins are right.but when i high or lower level on reset pin of the second phy,there is no logs printed..

Can somebody help me about this problem?