AMCC 440EP phy detection

Stefan Roese sr at
Thu Apr 9 02:01:27 EST 2009

On Wednesday 08 April 2009, Eddie Dawydiuk wrote:
> > I found the ibm_newemac driver(2.6.29) makes the assumption that the
> > bootloader has already configured the tx enable pin as it is a
> > multiplexed pin. Unfortuantley I am not using U-Boot and our minimal
> > bootloader does not do this.  After finding tx enable was never
> > asserting for Eth0 a quick user space program verified tx enable was
> > configured as a GPIO pin.
> I would like to eventually submit our changes for upstream support. Based
> on this would you recommend ensuring tx enable is configured properly in
> the initialization of the ibm_newemac driver or the platform
> initialization?

This GPIO multiplexing configuration does not belong into the ibm_newemac 
driver since it is very platform/board specific. The platform code is 
definitely a better place.

Best regards,

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