Wolfgang, As long as you are not using only one FEC's mdio/mdc to communicate the both PHY at address 1.
Best Regards, TsiChung -----Original Message----- From: u-boot-boun...@lists.denx.de [mailto:u-boot-boun...@lists.denx.de] On Behalf Of w.weg...@astro-kom.de Sent: Tuesday, March 23, 2010 10:40 AM To: John Schmoller; u-boot@lists.denx.de Subject: Re: [U-Boot] several problems with ethernet on MCF5445x Dear John, On 23 Mar 2010 at 10:11, John Schmoller wrote: > On Tue, 2010-03-23 at 15:50 +0100, w.weg...@astro-kom.de wrote: > > I have a DP83848J PHY connected in MII mode to each of the FEC0 and > > FEC1 ports (seperate MDIO connection). Both PHYs are set to address > > 0x0. *) > > Are you sure this is what you want? From the data sheet: > > Strapping PHY Address 0 puts the part into Isolate Mode. [...] sorry, my fault... I forgot about the internal pullup and did not read carefully that U-Boot correctly identified the PHY at address 1. So, both PHYs are strapped to address 0x01. My concern was, if there is any problem arising from two PHYs sharing the same address while being accessed through different physical interfaces. E.g., it seems I can only access one of the PHYs via the "mii" commands - I am not sure if this is a limitation originating from the identical addresses, or some other problem with my setup. Thanks for pointing out that mistake! Regards, Wolfgang _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
