linux-kernel - Re: [PATCH v3 2/2] PCI/portdrv: Add support for PCIe wake interrupt

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Message-ID: <20250609162930.GA749610@bhelgaas>
Date: Mon, 9 Jun 2025 11:29:30 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	cros-qcom-dts-watchers@...omium.org,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, quic_vbadigan@...cinc.com,
	quic_mrana@...cinc.com, Sherry Sun <sherry.sun@....com>
Subject: Re: [PATCH v3 2/2] PCI/portdrv: Add support for PCIe wake interrupt

On Mon, Jun 09, 2025 at 11:27:49AM +0530, Krishna Chaitanya Chundru wrote:
> On 6/6/2025 1:56 AM, Bjorn Helgaas wrote:
> > On Thu, Jun 05, 2025 at 10:54:45AM +0530, Krishna Chaitanya Chundru wrote:
> > > PCIe wake interrupt is needed for bringing back PCIe device state
> > > from D3cold to D0.

> > > +	wake = devm_fwnode_gpiod_get(&pdev->dev, of_fwnode_handle(dn),
> > > +				     "wake", GPIOD_IN, NULL);
> > 
> > I guess this finds "wake-gpio" or "wake-gpios", as used in
> > Documentation/devicetree/bindings/pci/qcom,pcie.yaml,
> > qcom,pcie-sa8775p.yaml, etc?  Are these names specified in any generic
> > place, e.g.,
> > https://github.com/devicetree-org/dt-schema/tree/main/dtschema/schemas/pci?
> > 
> I created a patch to add them in common schemas:
> https://lore.kernel.org/all/20250515090517.3506772-1-krishna.chundru@oss.qualcomm.com/

Thanks.  I think it will help other DT writers if we can include a
link to the relevant dtschema commit in this commit log.