linux-kernel - Re: [PATCH v1 1/1] dt-bindings: phy: ocelot-serdes: convert to YAML

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Message-ID: <ee93aa8a-d704-9d67-ad33-c81654c90ca2@linaro.org>
Date:   Tue, 23 Aug 2022 11:36:29 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Colin Foster <colin.foster@...advantage.com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-phy@...ts.infradead.org
Cc:     UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH v1 1/1] dt-bindings: phy: ocelot-serdes: convert to YAML

On 23/08/2022 09:00, Colin Foster wrote:
> Convert the phy-ocelot-serdes device tree binding to the new YAML format.
> 
> Additionally, add the file to MAINTAINERS since the original file didn't
> exist.
> 
> Signed-off-by: Colin Foster <colin.foster@...advantage.com>
> ---
>  .../bindings/phy/phy-ocelot-serdes.txt        | 43 -------------
>  .../bindings/phy/phy-ocelot-serdes.yaml       | 61 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  3 files changed, 62 insertions(+), 43 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/phy/phy-ocelot-serdes.txt
>  create mode 100644 Documentation/devicetree/bindings/phy/phy-ocelot-serdes.yaml

Filename based on compatible, so
mscc,vsc7514-serdes.yaml

> 


> diff --git a/Documentation/devicetree/bindings/phy/phy-ocelot-serdes.yaml b/Documentation/devicetree/bindings/phy/phy-ocelot-serdes.yaml
> new file mode 100644
> index 000000000000..0666974d886a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/phy-ocelot-serdes.yaml
> @@ -0,0 +1,61 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/phy-ocelot-serdes.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microsemi Ocelot SerDes muxing driver

s/driver//

Bindings are for hardware, not for Linux drivers.

> +
> +maintainers:
> +  - Alexandre Belloni <alexandre.belloni@...tlin.com>
> +  - UNGLinuxDriver@...rochip.com
> +
> +description: |
> +  On Microsemi Ocelot, there is a handful of registers in HSIO address
> +  space for setting up the SerDes to switch port muxing.
> +
> +  A SerDes X can be "muxed" to work with switch port Y or Z for example.
> +  One specific SerDes can also be used as a PCIe interface.
> +
> +  Hence, a SerDes represents an interface, be it an Ethernet or a PCIe one.
> +
> +  There are two kinds of SerDes: SERDES1G supports 10/100Mbps in
> +  half/full-duplex and 1000Mbps in full-duplex mode while SERDES6G supports
> +  10/100Mbps in half/full-duplex and 1000/2500Mbps in full-duplex mode.
> +
> +  Also, SERDES6G number (aka "macro") 0 is the only interface supporting
> +  QSGMII.
> +
> +  This is a child of the HSIO syscon ("mscc,ocelot-hsio", see
> +  Documentation/devicetree/bindings/mips/mscc.txt) on the Microsemi Ocelot.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mscc,vsc7514-serdes

Missing blank line

> +  "#phy-cells":
> +    const: 2
> +    description: |
> +      from the generic phy bindings, must be 2. 

Skip first sentence, it's obvious.

The first number
> +      defines the input port to use for a given SerDes macro. The
> +      second defines the macro to use. They are defined in
> +      dt-bindings/phy/phy-ocelot-serdes.h
> +
> +required:
> +  - compatible
> +  - "#phy-cells"

Missing additionalProperties: false

Base your YAML on example-schema.

> +
> +examlpes:

Typo.


> +  - |
> +    serdes: serdes {
> +      compatible = "mscc,vsc7514-serdes";
> +      #phy-cells = <2>;
> +    };
> +
> +    ethernet {
> +      port1 {
> +        phy-handle = <&phy_foo>;
> +        /* Link SERDES1G_5 to port1 */
> +        phys = <&serdes 1 SERDES1G_5>;
> +      };
> +    };

Skip consumer examples in provider bindings. They're obvious.

> diff --git a/MAINTAINERS b/MAINTAINERS
> index 714fd8b45e5a..10dd3c6ad6ad 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -13481,6 +13481,7 @@ M:	UNGLinuxDriver@...rochip.com
>  L:	linux-mips@...r.kernel.org
>  S:	Supported
>  F:	Documentation/devicetree/bindings/mips/mscc.txt
> +F:	Documentation/devicetree/bindings/phy/phy-ocelot-serdes.yaml
>  F:	Documentation/devicetree/bindings/pinctrl/mscc,ocelot-pinctrl.yaml
>  F:	Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
>  F:	arch/mips/boot/dts/mscc/


Best regards,
Krzysztof