Re: [PATCH v4 3/4] dt-bindings: PCI: rockchip: Add support for pcie wake irq

Brian Norris
2017-08-28T22:44:54Z

On Mon, Aug 28, 2017 at 04:32:55PM -0500, Rob Herring wrote:
> On Fri, Aug 25, 2017 at 1:20 PM, Brian Norris <briannorris@chromium.org> wrote:
> > On Fri, Aug 25, 2017 at 01:14:39PM -0500, Rob Herring wrote:
> >> Use the wakeup source binding:
> >> Documentation/devicetree/bindings/power/wakeup-source.txt
> >
> > And I suppose this means we'd fall under this paragraph?
> >
> > "However if the devices have dedicated interrupt as the wakeup source
> > then they need to specify/identify the same using device specific
> > interrupt name. In such cases only that interrupt can be used as wakeup
> > interrupt."
> >
> > We don't expect *any* interrupt to qualify as PCI WAKE#; so we should
> > still also document the interrupt name ("wake"?) in
> > Documentation/devicetree/bindings/pci/pci.txt as Bjorn suggested, in
> > addition to using the 'wakeup-source' property documented there.
>
> I believe the defined interrupt name is "wakeup" as example 1 shows.

That's an example, not a definition. And the definition I quoted
literally says "device specific interrupt name". The PCIe specification
calls it "WAKE#" all over the place, so I figured that's a good name to
use.

"wakeup" is also fine I suppose, as long as we document that it must be
PCIe WAKE# signal, as per the PCIe specfication.

Brian