On Thu, Oct 31, 2013 at 05:40:29PM +0000, Mark Rutland wrote: > For the ARM SMMU binding, each device has a #stream-id-cells property > describing how many IDs it has, and then the SMMU node has a phandle+args > linkage to each of the devices attached to it, describing their stream IDs. > While this does have some limitations (a device can't be plugged into multiple > SMMUs with a different number of IDs), it seems generally sane. If a device masters through two separate SMMUs, I think you need to describe it as two devices. Even if you could describe the thing in DT, the Linux driver/iommu model will quickly fall over. Will -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html