I recently finished work on u-boot to get it to read a compact flash properly on the AU1500. Now I need to get it working under Linux as well, but have a few questions. Is root fs on CF supported under 2.4.22?
I guess you mean a CF card in a PCMCIA slot. There are boards that use a CF through a CPLD connected to the processor bus, which works with the usual custom IDE setup functions.
The kernel isn't going to support CF on PCMCIA the way you are asking without some, ummm..."customizations" :-) You have to modify the PCMCIA functions so they don't try to use the slot, but you still need to initialize the I/O. Then you need a set of IDE setup/support functions in your board specific files.
This can be done, but isn't pretty and I doubt would ever be selected as something to be part of a standard kernel. You may also want to consider some kind of initrd or small flash file system that has the PCMCIA services. You would boot up using something else as the root file system, then activate the CF on PCMCIA as a source of additional mounted file systems.
Good Luck!
-- Dan
