i.MX6UL Ethernet Driver

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i.MX6UL Ethernet Driver

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TerryMcHenry
Contributor II

The Ethernet from Freescale states;

* The dual fec interfaces are not equivalent with enet-mac.

* Here are the differences:

*

* - fec0 supports MII & RMII modes while fec1 only supports RMII

* - fec0 acts as the 1588 time master while fec1 is slave

* - external phys can only be configured by fec0

*

* That is to say fec1 can not work independently. It only works

* when fec0 is working. The reason behind this design is that the

* second interface is added primarily for Switch mode.

*

* Because of the last point above, both phys are attached on fec

* mdio interface in board design, and need to be configured by

* fec0 mii_bus.

Does this means that 1588 timing synchronization can only be achieved from the ENET1 input?

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Yuri
NXP Employee
NXP Employee

Hello,

  The mentioned comments (restrictions) relate to i.MX28 device (with hardware switch support).

As for i.MX6UL, please refer to its documentation

i.MX 6UltraLite Applications Processor|NXP

i.MX 6 Series Software and Development Tool|NXP

Have a great day,
Yuri

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