[U-Boot] [PATCH 5/5 v1] integrator: make flash writeable on boot

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

Le 18/09/2011 15:24, Wolfgang Denk a ?crit :
> Dear Albert ARIBAUD,
>
> In message<4E75C4A4.20604@aribaud.net>  you wrote:
>>
>> Le 18/09/2011 09:52, Linus Walleij a =E9crit :
>>> This reconfigures the EBI (External Bus Interface) on the
>>> integrator so that chip select 1, handling the flash memory, is
>>> set to writeable. Without this it is not possible for U-Boot to
>>> access flash memory and it crashes on startup since CFI won't
>>> work properly.
>>
>> Do you mean that U-Boot writes to the flash at each boot on this board?
>
> I think this is a misunderstanding of terms.  When we try to
> identify the flash type and geomentry in the CFI driver, we do send
> certain commands to the flash, and read the returned data.  This
> "sending commands" includes write cycles to the flash address space,
> so it is necessary that the memory controller setup allows write
> cycles on the bus.
>
> This does however NOT mean that any data are programmed into the
> flash.

Indeed, I had misunderstood the commit message. Apologies.

> Best regards,
>
> Wolfgang Denk

Amicalement,
-- 
Albert.