[PATCH v6 1/3] dt-bindings: imx6q-pcie: Add optional intr/aer/pme interrupts for i.MX95

[Rob Herring]

On Wed, Jun 03, 2026 at 02:25:08PM +0800, hongxing.zhu at oss.nxp.com wrote:
> From: Richard Zhu <hongxing.zhu at nxp.com>
> 
> The i.MX95 PCIe controller introduces three additional dedicated hardware
> interrupt lines for specific events:
> - intr: general controller events
> - aer: Advanced Error Reporting events
> - pme: Power Management Events
> 
> These interrupts are optional on i.MX95. PCIe basic functionality
> (enumeration, configuration, and data transfer) works correctly without
> them, as the controller can operate using only the existing msi interrupt.
> 
> Earlier i.MX PCIe variants (imx6q, imx6sx, imx6qp, imx7d, imx8mm, imx8mp,
> imx8mq, imx8q) do not have these three dedicated interrupt lines.
> 
> Update the binding to allow up to 5 interrupts for i.MX95, while
> restricting earlier variants to a maximum of 2 interrupts using
> conditional constraints (if/then schema). This ensures the schema
> accurately reflects the hardware capabilities of each SoC variant.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu at nxp.com>
> Reviewed-by: Frank Li <Frank.Li at nxp.com>
> ---
>  .../bindings/pci/fsl,imx6q-pcie.yaml          | 29 +++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> index e8b8131f5f23..9b5d4e59dfff 100644
> --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> @@ -58,12 +58,18 @@ properties:
>      items:
>        - description: builtin MSI controller.
>        - description: builtin DMA controller.
> +      - description: PCIe event interrupt.
> +      - description: builtin AER SPI standalone interrupt line.
> +      - description: builtin PME SPI standalone interrupt line.
>  
>    interrupt-names:
>      minItems: 1
>      items:
>        - const: msi
>        - const: dma
> +      - const: intr
> +      - const: aer
> +      - const: pme
>  
>    reset-gpio:
>      deprecated: true
> @@ -248,6 +254,29 @@ allOf:
>              - const: pcie_aux
>              - const: ref
>              - const: extref  # Optional
> +        interrupts:
> +          maxItems: 5
> +        interrupt-names:
> +          maxItems: 5

5 is already the max.

> +
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - fsl,imx6q-pcie
> +            - fsl,imx6sx-pcie
> +            - fsl,imx6qp-pcie
> +            - fsl,imx7d-pcie
> +            - fsl,imx8mm-pcie
> +            - fsl,imx8mp-pcie
> +            - fsl,imx8mq-pcie
> +            - fsl,imx8q-pcie
> +    then:
> +      properties:
> +        interrupts:
> +          maxItems: 2
> +        interrupt-names:
> +          maxItems: 2
>  
>  unevaluatedProperties: false
>  
> -- 
> 2.34.1
>