linux-kernel - Re: [PATCH 1/2] dt-bindings: phy: add Amlogic G12A Analog MIPI D-PHY bindings

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Message-ID: <20201207224736.GB978231@robh.at.kernel.org>
Date:   Mon, 7 Dec 2020 16:47:36 -0600
From:   Rob Herring <robh@...nel.org>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     vkoul@...nel.org, kishon@...com, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: phy: add Amlogic G12A Analog MIPI D-PHY
 bindings

On Mon, Nov 23, 2020 at 03:51:56PM +0100, Neil Armstrong wrote:
> The Amlogic G12A SoCs embeds an Analog MIPI D-PHY to communicate with DSI
> panels, this adds the bindings.
> 
> This Analog D-PHY works with a separate Digital MIPI D-PHY.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  .../phy/amlogic,g12a-mipi-dphy-analog.yaml    | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/amlogic,g12a-mipi-dphy-analog.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/amlogic,g12a-mipi-dphy-analog.yaml b/Documentation/devicetree/bindings/phy/amlogic,g12a-mipi-dphy-analog.yaml
> new file mode 100644
> index 000000000000..28663552f05b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/amlogic,g12a-mipi-dphy-analog.yaml
> @@ -0,0 +1,40 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/phy/amlogic,g12a-mipi-dphy-analog.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Amlogic G12A MIPI analog PHY
> +
> +maintainers:
> +  - Neil Armstrong <narmstrong@...libre.com>
> +
> +description: |+
> +  The Everything-Else Power Domains node should be the child of a syscon
> +  node with the required property:
> +
> +  - compatible: Should be the following:
> +                "amlogic,meson-gx-hhi-sysctrl", "simple-mfd", "syscon"
> +
> +  Refer to the the bindings described in
> +  Documentation/devicetree/bindings/mfd/syscon.yaml

This schema should be referenced from the parent schema and if you have 
child nodes, you shouldn't be using syscon.yaml.

> +
> +properties:
> +  compatible:
> +    const: amlogic,g12a-mipi-dphy-analog
> +
> +  "#phy-cells":
> +    const: 0
> +
> +required:
> +  - compatible
> +  - "#phy-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    mpphy: phy {
> +          compatible = "amlogic,g12a-mipi-dphy-analog";
> +          #phy-cells = <0>;

Looks like a dedicated subset of registers, add 'reg' even if Linux 
doesn't use it (currently).

> +    };
> -- 
> 2.25.1
>