On Friday 20 June 2014 13:17:43 Santosh Shilimkar wrote:
> >> + dma-coherent;
> >> + dma-ranges;
> >> +
> >> + dwc3@2690000 {
> >> + compatible = "synopsys,dwc3";
> >> + [...]
> >> + };
> >
> > This example is a bit strange. I don't understand the relationship
> > between keystone-dwc3 and synopsys,dwc3, nor do I want to. I'd prefer
> > to see a simple example here.
> > dma-ranges is a property of the parent which you show, but
> > dma-coherent originally was a property of the bus master itself. While
> > we need to support that, are we changing that? We need to be clear on
> > where the property belongs even if the kernel is more lax.
> >
> I don't think we are changing it fundamentally but may be I missing
> your point. The dma-coherent as is now a per-device property.
> USB is one of the bus master supports coherency and hence showed
> up in above example.
I think it's enough if you just drop the "synopsys,dwc3" node and the
intermediate dma-ranges property from the example, leaving the
dma-coherent property in the "ti,keystone-dwc3" node.
Arnd
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