PCI bus node location

[Rafal Jaworowski]

Hi,
I have a couple of questions regarding host/PCI bridges nodes location:

- What is the reason most of the DTS definitions have the host/PCI  
bridges hanging off the root node, even though they are most often  
really part of the soc?
- Is this is some OF heritage (I couldn't find anything explicit about  
it in the original PCI bindings docs)?
- Is this convention enforced in FDT, or could PCI bus nodes be  
children of the soc node as well?

Rafal