RFC cpm2_devices DPRAM resource

[Allen Curtis]

>> Should the DPRAM appear as it's own platform_device?
>
> No.
>
>> Option 1) Specify the portion of the DPRAM used by each device with 
>> that platform_device definition. (current)
>
> You mean the parameter space?  That's different from DPRAM.
>
>> Option 2) Define the whole DPRAM region as its own platform_device 
>> entry. Move the device DPRAM information to the device specific 
>> platform structure.
>
> How is this any different from using the dpalloc() as it is today?
>
> The problem is that for the few standard devices we publicly support in
> Linux it is easy to think of DPRAM as a "general" resource.  However, 
> for
> more challenging devices and implementation, there are sometimes 
> specific
> regions of DPRAM that must be used with various additional 
> restrictions.
> For many of the "real world" devices I have done, drivers would manage
> their own, well known, DPRAM areas.  It isn't something that is easy
> to generalize or configure in advance.
>
Time for code.

- Allen