Re: PMU node location

On 01/12/2013 08:54 AM, Rob Herring wrote:

On 01/10/2013 07:47 AM, Michal Simek wrote:

quoted

Hi Rob, Mark, Grant and others,

I want to check with you the location of ARM pmu node
I see that
1) highbank and dbx5x0 have it in soc node

2) vexpress and tegra have no main bus and pmu is in root like all
others devices.
(Any reason no to have main bus? Does it mean that there is no bus or
that all
devices are accessible?)

That seems really wrong in general. Any memory mapped device is on a bus
of some kind. I'm not sure the reasoning. Perhaps Stephen can explain.

I saw no need to have add a bus node (there wasn't one before I started
touching DT on Tegra); the top-level of the DT represents the CPU's
entire view of the address space and has #address-cells/#size-cells, so
devices get probed there just fine, whether they're addressed MMIO
devices or not.