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

Brian Norris
2017-08-25T18:20:07Z

On Fri, Aug 25, 2017 at 01:14:39PM -0500, Rob Herring wrote:
> On Tue, Aug 22, 2017 at 11:19:33AM +0800, Jeffy Chen wrote:
> > Add an optional interrupt for PCIE_WAKE pin.
> >
> > Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
> > ---
> >
> > Changes in v4: None
> > Changes in v3: None
> > Changes in v2: None
> >
> > .../devicetree/bindings/pci/rockchip-pcie.txt | 20 ++++++++++++--------
> > 1 file changed, 12 insertions(+), 8 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/pci/rockchip-pcie.txt b/Documentation/devicetree/bindings/pci/rockchip-pcie.txt
> > index 5678be82530d..9f6504129e80 100644
> > --- a/Documentation/devicetree/bindings/pci/rockchip-pcie.txt
> > +++ b/Documentation/devicetree/bindings/pci/rockchip-pcie.txt
> > @@ -20,10 +20,13 @@ Required properties:
> > - msi-map: Maps a Requester ID to an MSI controller and associated
> > msi-specifier data. See ./pci-msi.txt
> > - interrupts: Three interrupt entries must be specified.
> > -- interrupt-names: Must include the following names
> > - - "sys"
> > - - "legacy"
> > - - "client"
> > +- interrupt-names: Include the following names
> > + Required:
> > + - "sys"
> > + - "legacy"
> > + - "client"
> > + Optional:
> > + - "wake"
>
> 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.

Brian