[U-Boot] [PATCH] Disable unused chip-select for DDR controller interleaving

[Wolfgang Denk]

Dear York Sun,

In message <1286988197.5737.6.camel at oslab-l1> you wrote:
>
> > Would it not be helpful to inform the user that we disabled a memory
> > bank? Eventually this wa snot intentional...
> 
> I can add a message but maybe not necessary. The only case the CS left
> disable is the incomplete interleaving. For example the controller
> interleaving is enabled, but the bank interleaving is disabled or less
> than all populated CS are interleaving. In these cases, the unused CSs
> (or maybe CS'es, my bad English) are not accessible, even enabled. This
> patch doesn't change the hardware behavior, but to disable those unused
> CS to avoid confusion.

I understand this.  But I think the conditions that cause such
behaviour are pretty unusual, and most probably not something that is
actually intended by the end user - for example, he might have
installed an incompatible DIMM or such.  It would be nice if he was
made aware that somthing unusual is going on, so he can double-check
his configuration.

Best regards,

Wolfgang Denk

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