IMX6UL - RMII to marvell switch

[pietercardoen]

Dear

I am trying to start a custom board with a marvell mv88e6171 switch connected via RMII to the imx6ul controller. The TX clock is provided by the switch towards the imx6ul controller. I've configured the imx6ul to use an external clock for the TX clock (GPR1 bits 17 and 13). The clock is 50 MHz. If I measure the data on ENET1_TXDATA0/1, It seems that the data is clocked out at a 5MHz rate. What could be the reason of this?

PS. The network communication is not yet working.

Best regards

Pieter Cardoen

[pietercardoen]

This issue is solved: The fec driver was reading at a wrong address of the marvell chip. By this, the driver was configured to 10Mbit mode but 100Mbit mode was required. I needed to use indirect addressing to force the fec driver to use the correct phy registers.

[igorpadykov]

Hi Pieter

had you added switch dts records like

linux-2.6-imx.git - Freescale i.MX Linux Tree 

linux-2.6-imx.git - Freescale i.MX Linux Tree 

one can try to debug starting driver probe in

linux/drivers/net/dsa/mv88e6171.c

Best regards
igor
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