netdev - Re: [PATCH v3 03/16] dt-bindings: net: Add a YAML schemas for the generic MDIO options

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Date:   Wed, 19 Jun 2019 08:17:52 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Mark Rutland <mark.rutland@....com>,
        Frank Rowand <frowand.list@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Chen-Yu Tsai <wens@...e.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        netdev <netdev@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>, devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        Maxime Chevallier <maxime.chevallier@...tlin.com>,
        Antoine Ténart <antoine.tenart@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH v3 03/16] dt-bindings: net: Add a YAML schemas for the
 generic MDIO options

On Wed, Jun 19, 2019 at 3:47 AM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
>
> The MDIO buses have a number of available device tree properties that can
> be used in their device tree node. Add a YAML schemas for those.
>
> Suggested-by: Andrew Lunn <andrew@...n.ch>
> Signed-off-by: Maxime Ripard <maxime.ripard@...tlin.com>
>
> ---
>
> Changes from v2:
>   - New patch
> ---
>  Documentation/devicetree/bindings/net/mdio.txt  | 38 +-------------
>  Documentation/devicetree/bindings/net/mdio.yaml | 51 ++++++++++++++++++-
>  2 files changed, 52 insertions(+), 37 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/net/mdio.yaml
>
> diff --git a/Documentation/devicetree/bindings/net/mdio.txt b/Documentation/devicetree/bindings/net/mdio.txt
> index e3e1603f256c..cf8a0105488e 100644
> --- a/Documentation/devicetree/bindings/net/mdio.txt
> +++ b/Documentation/devicetree/bindings/net/mdio.txt
> @@ -1,37 +1 @@
> -Common MDIO bus properties.
> -
> -These are generic properties that can apply to any MDIO bus.
> -
> -Optional properties:
> -- reset-gpios: One GPIO that control the RESET lines of all PHYs on that MDIO
> -  bus.
> -- reset-delay-us: RESET pulse width in microseconds.
> -
> -A list of child nodes, one per device on the bus is expected. These
> -should follow the generic phy.txt, or a device specific binding document.
> -
> -The 'reset-delay-us' indicates the RESET signal pulse width in microseconds and
> -applies to all PHY devices. It must therefore be appropriately determined based
> -on all PHY requirements (maximum value of all per-PHY RESET pulse widths).
> -
> -Example :
> -This example shows these optional properties, plus other properties
> -required for the TI Davinci MDIO driver.
> -
> -       davinci_mdio: ethernet@...30000 {
> -               compatible = "ti,davinci_mdio";
> -               reg = <0x5c030000 0x1000>;
> -               #address-cells = <1>;
> -               #size-cells = <0>;
> -
> -               reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
> -               reset-delay-us = <2>;
> -
> -               ethphy0: ethernet-phy@1 {
> -                       reg = <1>;
> -               };
> -
> -               ethphy1: ethernet-phy@3 {
> -                       reg = <3>;
> -               };
> -       };
> +This file has moved to mdio.yaml.
> diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml
> new file mode 100644
> index 000000000000..8f4f9d0a2882
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/mdio.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/mdio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MDIO Bus Generic Binding
> +
> +maintainers:
> +  - Andrew Lunn <andrew@...n.ch>
> +  - Florian Fainelli <f.fainelli@...il.com>
> +  - Heiner Kallweit <hkallweit1@...il.com>
> +
> +description:
> +  These are generic properties that can apply to any MDIO bus. Any
> +  MDIO bus must have a list of child nodes, one per device on the
> +  bus. These should follow the generic ethernet-phy.yaml document, or
> +  a device specific binding document.
> +
> +properties:
> +  reset-gpios:
> +    maxItems: 1
> +    description:
> +      The phandle and specifier for the GPIO that controls the RESET
> +      lines of all PHYs on that MDIO bus.
> +
> +  reset-delay-us:
> +    description:
> +      RESET pulse width in microseconds. It applies to all PHY devices
> +      and must therefore be appropriately determined based on all PHY
> +      requirements (maximum value of all per-PHY RESET pulse widths).
> +
> +examples:
> +  - |
> +    davinci_mdio: ethernet@...30000 {

Shouldn't this be mdio@... ?

> +        compatible = "ti,davinci_mdio";
> +        reg = <0x5c030000 0x1000>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        reset-gpios = <&gpio2 5 1>;
> +        reset-delay-us = <2>;
> +
> +        ethphy0: ethernet-phy@1 {

Would be good to have some unit-address checks. Could be a follow-up though.

> +            reg = <1>;
> +        };
> +
> +        ethphy1: ethernet-phy@3 {
> +            reg = <3>;
> +        };
> +    };
> --
> git-series 0.9.1