PMU node location

[Stephen Warren]

On 01/12/2013 08:54 AM, Rob Herring wrote:
> On 01/10/2013 07:47 AM, Michal Simek wrote:
>> 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.