linux-kernel - Re: [PATCH v1 2/2] dt-bindings: edac: Add cadence ddr mc support

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Date:   Tue, 10 Mar 2020 13:44:47 -0500
From:   Rob Herring <robh@...nel.org>
To:     Dhananjay Kangude <dkangude@...ence.com>
Cc:     linux-edac@...r.kernel.org, bp@...en8.de, mchehab@...nel.org,
        tony.luck@...el.com, james.morse@....com,
        linux-kernel@...r.kernel.org, mparab@...ence.com,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v1 2/2] dt-bindings: edac: Add cadence ddr mc support

On Fri, Feb 28, 2020 at 10:43:22AM +0100, Dhananjay Kangude wrote:
> Add documentation for cadence ddr memory controller EDAC DTS bindings
> 
> Signed-off-by: Dhananjay Kangude <dkangude@...ence.com>
> ---
>  .../devicetree/bindings/edac/cdns,ddr-edac.yaml    | 59 ++++++++++++++++++++++
>  1 file changed, 59 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/edac/cdns,ddr-edac.yaml
> 
> diff --git a/Documentation/devicetree/bindings/edac/cdns,ddr-edac.yaml b/Documentation/devicetree/bindings/edac/cdns,ddr-edac.yaml
> new file mode 100644
> index 000000000000..d83d8840d57b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/edac/cdns,ddr-edac.yaml
> @@ -0,0 +1,59 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/edac/cdns,ddr-edac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cadence DDR IP with ECC support (EDAC)
> +
> +description:
> +  This binding describes the Cadence DDR/LPDDR IP with ECC feature enabled
> +  to detect and correct CE/UE errors.
> +
> +maintainers:
> +  - Dhananjay Kangdue <dkangude@...ence.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - cdns,cadence-ddr4-mc-edac

You have Cadence twice effectively.

'edac' is a linuxism. The binding should be for the DDR controller 
unless this block only does ECC. Name it based on what the h/w is 
called.

> +
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 1
> +
> +  ranges: true

You don't have any children defined, so you don't need these 3 
properties.

> +
> +  reg:
> +    minItems: 1
> +    maxItems: 2
> +    items:
> +      - description:
> +          Register block of DDR/LPDDR apb registers up to mapped area.
> +          Mapped area contains the register set for memory controller,
> +          phy and PI module register set doesn't part of this mapping.
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - ranges
> +  - reg
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    edac: edac@...00000 {
> +        compatible = "cdns,cadence-ddr4-mc-edac";
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        ranges;
> +        reg = <0xfd100000 0x4000>;
> +        interrupts = <0x00 0x01 0x04>;
> +        };

Wrong indent.

> +...
> -- 
> 2.15.0
>