[U-Boot] [PATCH] i.MX6: nitrogen6x: update memory configuration files to use macros

[Eric Nelson <eric.nelson@boundarydevices.com>]

On 11/18/2013 02:32 AM, Stefano Babic wrote:
> Hi Eric,
>
> On 14/11/2013 22:28, Eric Nelson wrote:
>>> I dont mind either way, but just an idea for discussion:
>>>
>>> What do you say to implementing the DRAM controller programming in
>>> SPL? That
>>> way, we can even do proper DRAM calibration on boot and other such
>>> nice things.
>>> And we'd also get rid of these static magic numbers all around.
>>>
>>
>> We can (and hopefully will very soon) implement some of the
>> configuration in C under SPL, but we can't (and shouldn't) get
>> rid of all of the magic numbers.
>>
>> Some of these numbers come from testing large numbers of devices
>> under a variety of temperature conditions. The best that the
>> automagic calibration facilities can do is set things up based
>> on nominal current conditions.
>>
>> That said, I'm sure we can cut down on the total number.
>>
>> My immediate goal is simply to set the stage for SPL and
>> a single binary.
>
> I agree on this roadmap. Of course, it will be very nice to allow
> runtime DDR calibration, but we can do this in a second step.
>

Thanks Stefano,

BTW, I did some additional work yesterday to complete the compilation
of a single SPL image with multiple DDR configurations.

A V2 of this patch will be needed.

Regards,


Eric