linux-kernel - Re: [PATCH 1/4] dt-bindings: net: Add aspeed,ast2600-mdio binding

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Message-ID: <CAL_JsqLytwfsoyS6TSnpPgTjRTOR0TeQwroX21AHqj3A1mPJ5Q@mail.gmail.com>
Date:   Mon, 29 Jul 2019 17:37:19 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Andrew Jeffery <andrew@...id.au>
Cc:     netdev <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Mark Rutland <mark.rutland@....com>,
        Joel Stanley <joel@....id.au>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        devicetree@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed@...ts.ozlabs.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] dt-bindings: net: Add aspeed,ast2600-mdio binding

On Sun, Jul 28, 2019 at 10:39 PM Andrew Jeffery <andrew@...id.au> wrote:
>
> The AST2600 splits out the MDIO bus controller from the MAC into its own
> IP block and rearranges the register layout. Add a new binding to
> describe the new hardware.
>
> Signed-off-by: Andrew Jeffery <andrew@...id.au>
> ---
>  .../bindings/net/aspeed,ast2600-mdio.yaml     | 61 +++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
>
> diff --git a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
> new file mode 100644
> index 000000000000..fa86f6438473
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
> @@ -0,0 +1,61 @@
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/aspeed,ast2600-mdio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ASPEED AST2600 MDIO Controller
> +
> +maintainers:
> +  - Andrew Jeffery <andrew@...id.au>
> +
> +description: |+
> +  The ASPEED AST2600 MDIO controller is the third iteration of ASPEED's MDIO
> +  bus register interface, this time also separating out the controller from the
> +  MAC.
> +

Should have a:

allOf:
  - $ref: "mdio.yaml#"

> +properties:
> +  compatible:
> +    const: aspeed,ast2600-mdio
> +  reg:
> +    maxItems: 1
> +    description: The register range of the MDIO controller instance

> +  "#address-cells":
> +    const: 1
> +  "#size-cells":
> +    const: 0

Then you can drop these 2.

> +
> +patternProperties:
> +  "^ethernet-phy@[a-f0-9]$":
> +    properties:
> +      reg:
> +        description:
> +          The MDIO bus index of the PHY

And this.

> +      compatible:
> +        enum:
> +          - ethernet-phy-ieee802.3-c22
> +          - ethernet-phy-ieee802.3-c45

This isn't specific to ASpeed either and is already covered by
ethernet-phy.yaml.

So that means none of the child node schema is needed here.

> +    required:
> +      - reg
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#address-cells"
> +  - "#size-cells"
> +
> +examples:
> +  - |
> +    mdio0: mdio@...50000 {
> +            compatible = "aspeed,ast2600-mdio";
> +            reg = <0x1e650000 0x8>;
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            status = "okay";

Don't show status in examples.

> +
> +            ethphy0: ethernet-phy@0 {
> +                    compatible = "ethernet-phy-ieee802.3-c22";
> +                    reg = <0>;
> +            };
> +    };
> --
> 2.20.1
>