Re: [RM9200] Using data bus and address bus through Linux Kernel

Hello Frederic,
> The main problem is that during the init step, it seems that an access to
> flash memory is done (input/output error in shell, JFFS2 notice in debug).
>   
As far as I remember, CS7 memory region works well for me.
> So I have several question about all of this.
> - Is this possible to access to data and address bus such as I/O's even if
> SDRAM, Flash memory and so on are connected?
>   
Yes, I'm doing that, it works fine with CS7 memory region.
> - If data bus can be used through writeb, is there any possibilty for
> address bus to be accessed in a similar way?
>   
When you use writeb on the CS regions - than that involves the address 
bus. writeb in the CS7 region puts the adress to the adress bus...
Furthermore there are some address bus pins that are multiplexed with 
the GPIO's, a21-a23, I believe.

For me, it worked well, even without:

- disable internal pullup for the data bus
- configure chip select timing


Greets,
Ole
> With kinds of regards,
>
> Frederic
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