linux-kernel - Re: [PATCH net-next] dt-bindings: net: xilinx: document xilinx emaclite driver binding

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Message-ID: <5c426fdc-6250-60fe-6c10-109a0ceb3e0c@linaro.org>
Date:   Sat, 21 May 2022 17:43:52 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, harini.katakam@....com,
        michal.simek@....com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, git@....com
Subject: Re: [PATCH net-next] dt-bindings: net: xilinx: document xilinx
 emaclite driver binding

On 20/05/2022 09:24, Radhey Shyam Pandey wrote:
> Add basic description for the xilinx emaclite driver DT bindings.
> 
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
> ---
> Changes since RFC:
> - Add ethernet-controller yaml reference.
> - 4 space indent for DTS example.
> ---
>  .../bindings/net/xlnx,emaclite.yaml           | 63 +++++++++++++++++++
>  1 file changed, 63 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/xlnx,emaclite.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/xlnx,emaclite.yaml b/Documentation/devicetree/bindings/net/xlnx,emaclite.yaml
> new file mode 100644
> index 000000000000..6105122ad583
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/xlnx,emaclite.yaml
> @@ -0,0 +1,63 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/xlnx,emaclite.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Xilinx Emaclite Ethernet controller
> +
> +allOf:
> +  - $ref: ethernet-controller.yaml#

This goes just before properties (so after maintainers).

> +
> +maintainers:
> +  - Radhey Shyam Pandey <radhey.shyam.pandey@....com>
> +  - Harini Katakam <harini.katakam@....com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - xlnx,opb-ethernetlite-1.01.a
> +      - xlnx,opb-ethernetlite-1.01.b
> +      - xlnx,xps-ethernetlite-1.00.a
> +      - xlnx,xps-ethernetlite-2.00.a
> +      - xlnx,xps-ethernetlite-2.01.a
> +      - xlnx,xps-ethernetlite-3.00.a
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  phy-handle: true
> +
> +  local-mac-address: true
> +
> +  xlnx,tx-ping-pong:
> +    type: boolean
> +    description: hardware supports tx ping pong buffer.
> +
> +  xlnx,rx-ping-pong:
> +    type: boolean
> +    description: hardware supports rx ping pong buffer.
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - phy-handle
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    axi_ethernetlite_1: ethernet@...00000 {
> +        compatible = "xlnx,xps-ethernetlite-3.00.a";
> +        interrupt-parent = <&axi_intc_1>;
> +        interrupts = <1 0>;

Is "0" an interrupt none type? If yes, then this should be rather a
define and a proper type, not none.

> +        local-mac-address = [00 0a 35 00 00 00];

Each device should get it's own MAC address, right? I understand you
leave it for bootloader, then just fill it with 0.

> +        phy-handle = <&phy0>;
> +        reg = <0x40e00000 0x10000>;

Put the reg after compatible in DTS code.

> +        xlnx,rx-ping-pong;
> +        xlnx,tx-ping-pong;
> +    };


Best regards,
Krzysztof