[U-Boot-Users] Is there anyone worked on ppc440EPx?

Hi, I encounter a weird problems, I found my code works fine on the 440EPX iic0, while I can't make the iic1 work, why? Is the IIC1 need additional initialzation to make it work? however so far I found IIC0 and IIC1 are using the same code. No answer I found from the CPU user manual. ,Thanks- Denny