LXT972 FEC problem on MPC855

Xiaogeng (Shawn) Jin xjin at redswitch.com
Wed Aug 28 10:19:31 EST 2002

>>In the code which defines 'phy_info_lxt971', it says that somehow LXT971
>>tells me that the link is down when the first read after power-up. So
>>you have to read MII_REG_SR to set 'fep->phy_status' accordingly. But in
>>my case, the read action occurred too early to wait till the link is up.
>>So what I did is to delay 5s before reading MII_REG_SR during opening
>>FEC device. I guess it takes the link a while to autonegotiate the speed.
> Hmm. I suppose PHY should interrupt when link status change, and therefore
> phy_status would be updated accordingly. So, maybe you have a problem with
> your board's PHY interrupt signal.

Yeah, I think so. So I have to check whether the PHY interrupt is
enabled or not. Thanks for your thoughts.

- Shawn.

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