Please take a look at the following regarding the ATK.
The ATK Toolkit is not supported anymore.
The customer will have to switch to the Manufacturing Tool called MFG.
MFG Tool will be the main tool to flash / run images on a board.
MFG Tool is available now in a version that supports Win7 in 64bit.
In the recent MFG release there are 2 .exe files: mfgtool and mfgtool2.
mfgtool is intended for I.MX25,27,28,31,35, 50,53.
mfgtool2 is for i.mx6 seriels
mfgtool.exe can work at USB3.0 and 2.0
For example the following link contains i.MX25 MFG.
MX25 3stack HAB (High Assurance Boot)
As for Ethernet - it is usual way to load U-boot via UART and use U-boot Ethernet options for further operations.
Sorry, direct OS deployment via Ethernet is not supported under i.MX bootloaders.
Have a great day,
Yuri
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------