[U-Boot] RAM Probing for ads5121rev4

[Michele De Candia (VT) <michele.decandia@valueteam.com>]

Wolfgang Denk wrote:
> Dear "Michele De Candia (VT)",
>
> In message <49D23E30.4060205@valueteam.com> you wrote:
>   
>> The issue concerns the possibility to identify DDR chips type (e.g. by 
>> VendorId) before initialize them.
>> It doesn't concern configuration parameters (size, bus frequency, ecc..).
>> There isn't a DDR command to read this information, do you think it is 
>> possible to solve this problem in other ways?
>>     
>
> Yes, of course it is possible to solve this problem otherwise.
>
> In a sane hardware design you can read  this  information  from  some
> board configuration register or so; for example, on the ADS5121 there
> could  be  such  a  register implemented in the CPLD. But alas, there
> ain't none.
>
> Martha Marx posted pretty good patches (identifyung  board  revisions
> based  on  the MAC address) more than a month ago, but then failed to
> address the last review comments.
>
> If you want to get that fixed, please pick up her patches  (or  nudge
> her to do it for you).
>   
Hi Mr. Denk,
thanks for the suggestions, we've already picked up Martha Marx patches 
and they work fine on ADS5121.
We want to avoid DDR identification by board revisions because we don't 
know which DDR will be used in the future and it isn't a flexible way to 
do that.
After all, if it is the only way, we'll use this one.

Thanks,
Michele De Candia
> Best regards,
>
> Wolfgang Denk
>
>   


-- 

*Michele Jr **De Candia*

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