Jean-Christophe PLAGNIOL-VILLARD wrote: > > On the EVK1100 board, the CPU (UC3A0512) is connected to the PHY via an > > RMII bus. This requires the CPU clock to be at least 50 MHz. > > Unfortunately, the chip on current EVK1100 boards may be unable to run > > at more than 50 MHz, and with the oscillator on the board, the closest > > frequency we can generate is 48 MHz. > IMHO It's a HW design error to not use the MII
Some people want to use the extra pins for other things... Unfortunately, there are quite a few boards with early engineering samples around, and they have various issues. The chips that are in production are capable of running fast enough to support RMII. > > This patch makes it possible to limit the macb to 10 MBit for this > > case. We are open for suggestions for other solutions. > I guest you may need to disable the phy auto config mode and force him to be > see as a 10Mbps phy evenif it's a 10/100 No need to disable autonegotiation -- you still want to select between half an full duplex, for example. But you'll need to limit the available options to the ones that actually work. That said, I kind of like Ben's suggestion -- it's a more general solution to all sorts of board/phy/chip/whatever limitations. As for a better name, how about CONFIG_MACB_ADVERTISE? Haavard _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
