linux-kernel - Re: [PATCH] dt-bindings: net: qcom,emac: convert to dtschema

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Message-ID: <20240717163959.GA182655-robh@kernel.org>
Date: Wed, 17 Jul 2024 10:39:59 -0600
From: Rob Herring <robh@...nel.org>
To: Rayyan Ansari <rayyan.ansari@...aro.org>
Cc: devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Timur Tabi <timur@...nel.org>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: net: qcom,emac: convert to dtschema

On Wed, Jul 17, 2024 at 10:09:27AM +0100, Rayyan Ansari wrote:
> Convert the bindings for the Qualcomm EMAC Ethernet Controller from the
> old text format to yaml.
> 
> Also move the phy node of the controller to be within an mdio block so
> we can use mdio.yaml.
> 
> Signed-off-by: Rayyan Ansari <rayyan.ansari@...aro.org>
> ---
>  .../devicetree/bindings/net/qcom,emac.yaml    |  98 ++++++++++++++++
>  .../devicetree/bindings/net/qcom-emac.txt     | 111 ------------------
>  2 files changed, 98 insertions(+), 111 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/net/qcom,emac.yaml
>  delete mode 100644 Documentation/devicetree/bindings/net/qcom-emac.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/qcom,emac.yaml b/Documentation/devicetree/bindings/net/qcom,emac.yaml
> new file mode 100644
> index 000000000000..cef65130578f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/qcom,emac.yaml
> @@ -0,0 +1,98 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +---
> +$id: http://devicetree.org/schemas/net/qcom,emac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm EMAC Gigabit Ethernet Controller
> +
> +maintainers:
> +  - Timur Tabi <timur@...nel.org>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: qcom,fsm9900-emac
> +      - enum:
> +          - qcom,fsm9900-emac-sgmii
> +          - qcom,qdf2432-emac-sgmii

You just need a single enum for all 3 compatibles.
 
> +  reg:
> +    minItems: 1
> +    maxItems: 2

Need to define what each entry is and perhaps constraints on when it 1 
vs. 2 entries.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +if:
> +  properties:
> +    compatible:
> +      const: qcom,fsm9900-emac
> +then:
> +  allOf:
> +    - $ref: ethernet-controller.yaml#

This goes at the top level and the 'if' schema should be under the 
'allOf'.

> +  properties:
> +    clocks:
> +      minItems: 7
> +      maxItems: 7
> +
> +    clock-names:
> +      items:
> +        - const: axi_clk
> +        - const: cfg_ahb_clk
> +        - const: high_speed_clk
> +        - const: mdio_clk
> +        - const: tx_clk
> +        - const: rx_clk
> +        - const: sys_clk

Define these at the top level and then exclude them in the if schema.

> +
> +    internal-phy:
> +      maxItems: 1

This needs a type ref.

> +
> +    mdio:
> +      $ref: mdio.yaml#
> +      unevaluatedProperties: false
> +
> +  required:
> +    - clocks
> +    - clock-names
> +    - internal-phy
> +    - phy-handle
> +    - mdio
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    emac0: ethernet@...20000 {

Drop unused labels.

> +        compatible = "qcom,fsm9900-emac";
> +        reg = <0xfeb20000 0x10000>,
> +              <0xfeb36000 0x1000>;
> +        interrupts = <76>;
> +
> +        clocks = <&gcc 0>, <&gcc 1>, <&gcc 3>, <&gcc 4>, <&gcc 5>,
> +                 <&gcc 6>, <&gcc 7>;
> +        clock-names = "axi_clk", "cfg_ahb_clk", "high_speed_clk",
> +                      "mdio_clk", "tx_clk", "rx_clk", "sys_clk";
> +
> +        internal-phy = <&emac_sgmii>;
> +        phy-handle = <&phy0>;
> +
> +        mdio {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            phy0: ethernet-phy@0 {
> +                reg = <0>;
> +            };
> +        };
> +    };
> +
> +    emac_sgmii: ethernet@...38000 {

This should be a separate entry. (You need '- |' above it.)

> +        compatible = "qcom,fsm9900-emac-sgmii";
> +        reg = <0xfeb38000 0x1000>;
> +        interrupts = <80>;
> +    };