linux-kernel - Re: [PATCH 4/6] dt-bindings: memory: fsl: Add compatible string nxp, imx9-memory-controller

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Message-ID: <6068670.lOV4Wx5bFT@steina-w>
Date: Wed, 10 Jul 2024 09:18:16 +0200
From: Alexander Stein <alexander.stein@...tq-group.com>
To: York Sun <york.sun@....com>, Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>, James Morse <james.morse@....com>, Mauro Carvalho Chehab <mchehab@...nel.org>, Robert Richter <rric@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, linux-arm-kernel@...ts.infradead.org
Cc: linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org, Borislav Petkov <bp@...e.de>, devicetree@...r.kernel.org, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, Frank Li <Frank.Li@....com>, Frank Li <Frank.Li@....com>
Subject: Re: [PATCH 4/6] dt-bindings: memory: fsl: Add compatible string nxp, imx9-memory-controller

Hi Frank,

Am Dienstag, 9. Juli 2024, 22:23:05 CEST schrieb Frank Li:
> iMX9 memory controller is similar with other layerscape chips. But some
> register layout has a little bit difference, so add new compatible string
> 'nxp,imx9-memory-controller' for it.

Is this controller the same for all i.MX9 SoC? E.g. i.MX91, i.MX93,
i.MX95 and any future variants?

Best regards,
Alexander

> imx9 need two 'reg', one for DDR controller and the other is ECC inject
> engine register space. Keep the same restriction for other compatible
> string.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  .../bindings/memory-controllers/fsl/fsl,ddr.yaml   | 31 +++++++++++++++++++++-
>  1 file changed, 30 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml b/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml
> index 84f778a99546b..e0786153eec73 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml
> @@ -40,6 +40,7 @@ properties:
>            - fsl,p1021-memory-controller
>            - fsl,p2020-memory-controller
>            - fsl,qoriq-memory-controller
> +          - nxp,imx9-memory-controller
>  
>    interrupts:
>      maxItems: 1
> @@ -51,13 +52,41 @@ properties:
>      type: boolean
>  
>    reg:
> -    maxItems: 1
> +    items:
> +      - description: Controller register space
> +      - description: Inject register space
> +    minItems: 1
> +
> +  reg-names:
> +    items:
> +      - const: ctrl
> +      - const: inject
> +    minItems: 1
>  
>  required:
>    - compatible
>    - interrupts
>    - reg
>  
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - nxp,imx9-memory-controller
> +    then:
> +      properties:
> +        reg:
> +          minItems: 2
> +        reg-names:
> +          minItems: 2
> +    else:
> +      properties:
> +        reg:
> +          maxItems: 1
> +        reg-names: false
> +
>  additionalProperties: false
>  
>  examples:
> 
> 


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