linux-kernel - Re: [PATCH 1/1] dt-bindings: PCI: layerscape-pci: Fix property 'fsl,pcie-scfg' type

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Date: Fri, 28 Jun 2024 13:45:30 -0600
From: Rob Herring <robh@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	"open list:PCI SUBSYSTEM" <linux-pci@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>, imx@...ts.linux.dev
Subject: Re: [PATCH 1/1] dt-bindings: PCI: layerscape-pci: Fix property
 'fsl,pcie-scfg' type

On Fri, Jun 28, 2024 at 10:48:57AM -0400, Frank Li wrote:
> fsl,pcie-scfg actually need an argument when there are more than one PCIe
> instances. Change it to phandle-array and use items to describe each field
> means.
> 
> Fix below warning.
> 
> arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dtb: pcie@...0000: fsl,pcie-scfg:0: [22, 0] is too long
>         from schema $id: http://devicetree.org/schemas/pci/fsl,layerscape-pcie.yaml#
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> Change from v1 to v2
> - update commit message.
> ---
>  .../devicetree/bindings/pci/fsl,layerscape-pcie.yaml      | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml
> index 793986c5af7ff..679c2989de7a2 100644
> --- a/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml
> @@ -43,10 +43,16 @@ properties:
>        - const: config
>  
>    fsl,pcie-scfg:
> -    $ref: /schemas/types.yaml#/definitions/phandle
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>      description: A phandle to the SCFG device node. The second entry is the
>        physical PCIe controller index starting from '0'. This is used to get
>        SCFG PEXN registers.
> +    items:
> +      items:
> +        - description: A phandle to the SCFG device node
> +        - description: PCIe controller index starting from '0'
> +      minItems: 1

Are there any cases with only the phandle? I don't see any in tree and 
looks like the driver requires the 2nd entry.

> +    maxItems: 1
>  
>    big-endian:
>      $ref: /schemas/types.yaml#/definitions/flag
> -- 
> 2.34.1
>