[U-Boot] Force setting of ethact

[Wolfgang Denk]

Dear DUNDA Matthias,

In message <27800_1290086146_4CE52702_27800_13178_1_3CF34B583782C147807E09365F884DA42F058FDF03 at THSNCOA06MXS02P.ONE-06.GRP> you wrote:
> 
> I've been struggeling with the ethact setting in U-Boot: I want U-Boot to load from eTSEC0 on our board, but it always comes up with ethact = UEC0 or FSL UEC0 in older versions.
> 
> As ethact is not persistent, my only workaround so far was to change net/eth.c so that at all occasions, where ethact is set, it is set to eTSEC0 - during development, this was OK for me, but now I am cleaning up!

Why don't you use "ethprime" ?

> What's the intended/desired function of ethact, and how should it be initialized? Even using CONFIG_ETHPRIME has no effect.

These variabes are documented in the README.

> From my understanding of something named "ethact", I would expect, that it finds the (first) active ethernet device - active in a sense of connected or usable or whatever.

"active" as "currently active", i. e. what will be used when you issue
a network command.

> Although eTSEC0 is the only connected port on our device, it comes up with UEC0 - so, even if this interface in "on" in some way, this does not help here.
> 
> How can I force ethact to be eTSEC0 (or whichever I want), without tampering U-Boot base files?

"ethact" is the wrong variable for what you are trying to do. Use
"ethprime" instead.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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