Dear Javier Martin,
In message eedb5540910160633o81b1ae3sf37b2a00a5474584@mail.gmail.com you wrote:
I could finally test this in an original LogicPD i.mx27 litekit board and found the same problems. System gets stuck when issuing a ping command.
- I am using u-boot-arm repository "commit
617da90c1dcf65428ddfb63fef897439950bc915" without any modifications.
Can you please use mainline, i. e. the master branch at git://git.denx.de/u-boot.git instead?
Please, do you have an idea of what could I be missing?
Well, there is a "Possible iMX27 intermittent Ethernet connection issue rework" issued by LPD on 7/8/2008; in essence the PHY's internal 1.8V core regulator may shut off at power up.
To work around this, try and implement the following two hardware modifications:
1) Populate R841 with a 4.7K resistor. (This forces the internal core regulator off for the LAN8700. R841 is located on top of the PCB just "above" the LAN8700 IC.
2) Add a jumper wire from U125.5 to C561.1. This connects the on board 1.8V rail to the core ensuring that it is always powered.
And no, I don't guarantee you for anything.
Best regards,
Wolfgang Denk