[PATCH 6/9] ARM: dt: dove: add Dove PMU DT entry to dove.dtsi

Russell King - ARM Linux linux at arm.linux.org.uk
Tue Mar 17 06:43:35 PDT 2015

On Mon, Mar 16, 2015 at 07:27:30PM +0100, Gregory CLEMENT wrote:
> > +			pmu: power-management at d0000 {
> > +				compatible = "marvell,dove-pmu";
> > +				reg = <0xd0000 0x8000>, <0xd8000 0x8000>;
> Here you overlap some other nodes such as the thermal one (from 0xd001c
> to 0xd0028), the clock gate one (from 0xd0038 to 0xd003c), the gpio one,
> the pinctrl one ...

Yes, I'm well aware of that, but here's the thing...

I'm describing the hardware here.

The real problem is that Dove (etc) went down the path of breaking up
the PMU device into multiple smaller devices each specifying a sub-set
of the register range.  By doing that, Dove moved away from describing
the hardware - instead, we've described the Linux _implementation_ with
its separate (sub-)devices - its the implementation's choice that we'd
break up the PMU into these separate devices, almost to the point of
specifying each individual register.

What could be done to work around this oversight is to mvoe these
devices beneath the PMU node, which IMHO makes complete sense as these
are sub-devices of the PMU/PMC rather than separate devices.

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