linux-kernel - Re: [PATCH v3 2/3] dt-bindings: PCI: qcom: Document msi-map and msi-map-mask properties

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Date:   Sun, 8 Jan 2023 14:33:40 -0600
From:   Rob Herring <robh@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     andersson@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        bhelgaas@...gle.com, konrad.dybcio@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        lpieralisi@...nel.org
Subject: Re: [PATCH v3 2/3] dt-bindings: PCI: qcom: Document msi-map and
 msi-map-mask properties

On Mon, Jan 02, 2023 at 04:28:20PM +0530, Manivannan Sadhasivam wrote:
> The Qcom PCIe controller is capable of using either internal MSI controller
> or the external GIC-ITS for signaling MSIs sent by endpoint devices.
> Currently, the binding only documents the internal MSI implementation.
> 
> Let's document the GIC-ITS imeplementation by making use of msi-map and
> msi-map-mask properties. Only one of the implementation should be used
> at a time.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  Documentation/devicetree/bindings/pci/qcom,pcie.yaml | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> index a3639920fcbb..01208450e05c 100644
> --- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
> @@ -114,14 +114,20 @@ required:
>    - compatible
>    - reg
>    - reg-names
> -  - interrupts
> -  - interrupt-names
> -  - "#interrupt-cells"
>    - interrupt-map-mask
>    - interrupt-map
>    - clocks
>    - clock-names
>  
> +oneOf:

anyOf

The OS should have the option of both being present and pick which MSI 
path it wants to use. 

Rob