In message 43D44482.7030300@paulidav.org you wrote:
It looks like the basic SPI I/O function, spi_xfer() has two different prototypes in U-boot.
This is what happens when two groups of people solve the same problem independently.
On the other hand, the code for the "eeprom" command, which is another way to access an SPI EEPROM uses functions spi_read() and spi_write, which are implemented only in cpu/mpc{8xx, 8260, 5xxx}/spi.c. However, these functions are very basic. Fore example they do not allow you to control SPI chip select.
That's because they just deal with that: accessing a SPI EEPROM device.
Can someone tell me what is going on. Is it that MPC drivers became outdated and should be modified? How do other people use them then? Or I am simply missing something?
They are not "outdated". It's just a different (and incompatible) implementation. If you can come up with a patch tp cleanup please do so.
Best regards,
Wolfgang Denk