IMX53 read Mac Address from IIM

IMX53 read Mac Address from IIM

[Simone]

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Hello,

Actually we have a problem with the MAC address of the network on our IMX53
board.

The MAC id is actually stored on the SD card, instead of the IIM (inside
CPU).

This cause that if we change the SD card, without writing the correct MACid
in the bootloader env. variables,  the DHCP server give me a different IP
address.

 

There is a way to load the Mac from IIM fuses?

How to do this?

 

I am able to write in the IIM but I don't know how to tell bootloader to
load from IIM instead of boot variable.

 

Many Thanks

Simone


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Re: IMX53 read Mac Address from IIM

[Fabio Estevam]

On Thu, Nov 21, 2013 at 7:59 AM, Simone <cjb.sw.nospam@gmail.com> wrote:
> Hello,
>
> Actually we have a problem with the MAC address of the network on our IMX53
> board.
>
> The MAC id is actually stored on the SD card, instead of the IIM (inside
> CPU).
>
> This cause that if we change the SD card, without writing the correct MACid
> in the bootloader env. variables,  the DHCP server give me a different IP
> address.
>
>
>
> There is a way to load the Mac from IIM fuses?
>
> How to do this?
>
>
>
> I am able to write in the IIM but I don’t know how to tell bootloader to
> load from IIM instead of boot variable…

This is not related to meta-fsl-arm, so it would be better to post
U-boot related questions into the U-boot list.

By default the MAC address is read from the fuses in mainline U-boot.

If you delete the ethaddr manually, ie: 'setenv ethaddr', then you
will notice that during the next boot the ethaddr will be read from
the fuses and then stored into the SD card.

Regards,

Fabio Estevam