standard property to convey device dma address width?

[Scott Wood]

On Tue, 17 Aug 2010 15:55:04 -0500
Kumar Gala <galak at kernel.crashing.org> wrote:

> As I said to Stuart.  On the Freescale SOCs we have different device
> blocks w/varying dma address capabilities.  Some are limited to 32-bits
> some are capable of 36-bits on the same SOC.

Is this something that the driver would not know about, just based on
the compatible that it is matching?

-Scott