On 12/10/2012 06:20 AM, Michal Simek wrote:

Hi Grant and others,

I have a question regarding number of cells in ranges property
for pci and pcie nodes.

Linux pci/pcie powerpc DTSes contain 7 cells (xpedite5370.dts,
sequoia.dts, etc)
but also 6 cells format too (mpc832x_mds.dts)

Here is shown 6 cells ranges format and describe
http://devicetree.org/Device_Tree_Usage#PCI_Host_Bridge

And also in documentation in the linux
Documentation/devicetree/bindings/pci/83xx-512x-pci.txt

Both format uses:
#size-cells = <2>;
#address-cells = <3>;

What is valid format?

Both. 7 cells are valid when the host (parent) bus is 64-bit and 6 cells
are valid when the host bus is 32-bit. The ranges property is <<child
address> <parent address> <size>>. The parent address #address-cells is
taken from the parent node.

Rob