linux-kernel - Re: [PATCH v6 3/3] dt-bindings: pci: layerscape-pci-ep: Add snps,dw-pcie-ep.yaml reference

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Message-ID: <20240304182049.GA851904-robh@kernel.org>
Date: Mon, 4 Mar 2024 12:20:49 -0600
From: Rob Herring <robh@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: conor@...nel.org, bhelgaas@...gle.com, conor+dt@...nel.org,
	devicetree@...r.kernel.org, helgaas@...nel.org, imx@...ts.linux.dev,
	krzysztof.kozlowski+dt@...aro.org, kw@...ux.com,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	lpieralisi@...nel.org
Subject: Re: [PATCH v6 3/3] dt-bindings: pci: layerscape-pci-ep: Add
 snps,dw-pcie-ep.yaml reference

On Fri, Mar 01, 2024 at 11:27:41AM -0500, Frank Li wrote:
> Add snps,dw-pcie-ep.yaml.
> 
> Remove context that exist in snps,dw-pcie-ep.yaml.
> 
> Add an example for pcie-ep.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  .../bindings/pci/fsl,layerscape-pcie-ep.yaml  | 54 ++++++++++---------
>  1 file changed, 29 insertions(+), 25 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml
> index cf517e4e46a33..07965683beece 100644
> --- a/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml
> +++ b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml
> @@ -10,8 +10,7 @@ maintainers:
>    - Frank Li <Frank.Li@....com>
>  
>  description:
> -  This PCIe RC controller is based on the Synopsys DesignWare PCIe IP
> -  and thus inherits all the common properties defined in snps,dw-pcie.yaml.
> +  This PCIe RC controller is based on the Synopsys DesignWare PCIe IP.
>  
>    This controller derives its clocks from the Reset Configuration Word (RCW)
>    which is used to describe the PLL settings at the time of chip-reset.
> @@ -35,31 +34,18 @@ properties:
>        - const: fsl,ls-pcie-ep
>  
>    reg:
> -    description: base addresses and lengths of the PCIe controller register blocks.
> +    maxItems: 2
> +
> +  reg-names:
> +    maxItems: 2
>  
>    interrupts:
> -    description: A list of interrupt outputs of the controller. Must contain an
> -      entry for each entry in the interrupt-names property.
> +    minItems: 1
> +    maxItems: 3
>  
>    interrupt-names:
>      minItems: 1
>      maxItems: 3
> -    description: It could include the following entries.
> -    items:
> -      oneOf:
> -        - description:
> -            Used for interrupt line which reports AER events when
> -            non MSI/MSI-X/INTx mode is used.
> -          const: aer
> -        - description:
> -            Used for interrupt line which reports PME events when
> -            non MSI/MSI-X/INTx mode is used.
> -          const: pme
> -        - description:
> -            Used for SoCs(like ls2080a, lx2160a, ls2080a, ls2088a, ls1088a)
> -            which has a single interrupt line for miscellaneous controller
> -            events(could include AER and PME events).
> -          const: intr
>  
>    fsl,pcie-scfg:
>      $ref: /schemas/types.yaml#/definitions/phandle
> @@ -68,10 +54,7 @@ properties:
>        The second entry is the physical PCIe controller index starting from '0'.
>        This is used to get SCFG PEXN registers
>  
> -  dma-coherent:
> -    description: Indicates that the hardware IP block can ensure the coherency
> -      of the data transferred from/to the IP block. This can avoid the software
> -      cache flush/invalid actions, and improve the performance significantly
> +  dma-coherent: true
>  
>    big-endian:
>      $ref: /schemas/types.yaml#/definitions/flag
> @@ -85,3 +68,24 @@ required:
>    - reg
>    - interrupt-names
>  
> +allOf:
> +  - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      pcie-ep@...0000 {
> +        compatible = "fsl,ls1028a-pcie-ep", "fsl,ls-pcie-ep";
> +        reg = <0x00 0x03400000 0x0 0x00100000
> +              0x80 0x00000000 0x8 0x00000000>;
> +        reg-names = "dbi", "addr_space";
> +        interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* PME interrupt */

PME or...

> +        interrupt-names = "app";

app? You seem to just be changing the names to make the example happy. 
What do the dts files have? You need to make those pass.

Rob