[U-Boot-Users] Multiple Flash Devices
wd at denx.de
Thu Feb 24 23:31:48 CET 2005
In message <a04f56da05022109345c7fb8fc at mail.gmail.com> you wrote:
> I want to be able to access two (very different) flash devices. I
Just do it, then.
> Is there a good method of setting up two flash devices at once? As
Yes, U-Boot has always been capable of doing this. Your flash devices
will form spearate "banks" of flash memory. Thee is no requirement
that all banks must be identical. In fact, several boards use
different flash types on different banks.
> far as I can tell, all the flash functions (like flash_print_info, for
> example) can only be defined for one type of flash at a time.
You are wrong.
> There are two solutions I have thought of so far. One of them is pick
> whichever flash device is used the most and set that up normally. For
> the other flash, I could create different functions for it and in the
This is not accetable, and not necessary.
> The other option might be to create my own flash function wrappers
> that call the appropriate flash function based on, for example, the
> address passed into the function.
You don't have to create any new interfaces. The existing code which
provides a flash_info struncture per bank of flash memory is
> Has anyone else ran into this problem? Perhaps that is another board
It's not a problem. It's somthiong that is working fine on several
> config that already deals with this? I looked around, but there are a
> lot of configs and I easily could have missed what I was looking for.
See for example "board/cpu86/flash.c"
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