Message-ID: <f7752f68-11a6-cbf4-2f28-1de4c7ff9da2@linaro.org>
Date:   Fri, 17 Mar 2023 09:39:14 +0100
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Subject: Re: [PATCH v3 1/5] dt-bindings: phy: Add StarFive JH7110 USB/PCIe
 document
Content-Language: en-US
To:     Minda Chen <minda.chen@starfivetech.com>,
        Emil Renner Berthing <emil.renner.berthing@canonical.com>,
        Conor Dooley <conor@kernel.org>, Vinod Koul <vkoul@kernel.org>,
        Kishon Vijay Abraham I <kishon@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Pawel Laszczak <pawell@cadence.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Peter Chen <peter.chen@kernel.org>,
        Roger Quadros <rogerq@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>
Cc:     devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-phy@lists.infradead.org, linux-usb@vger.kernel.org,
        linux-riscv@lists.infradead.org,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>
References: <20230315104411.73614-1-minda.chen@starfivetech.com>
 <20230315104411.73614-2-minda.chen@starfivetech.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20230315104411.73614-2-minda.chen@starfivetech.com>
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Precedence: bulk

On 15/03/2023 11:44, Minda Chen wrote:
> Add StarFive JH7110 SoC USB 2.0/3.0 and PCIe 2.0 PHY dt-binding.
> PCIe 2.0 phy can use as USB 3.0 PHY.
> 
> Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
> ---
>  .../phy/starfive,jh7110-usb-pcie-phy.yaml     | 62 +++++++++++++++++++
>  1 file changed, 62 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-usb-pcie-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-pcie-phy.yaml
> new file mode 100644
> index 000000000000..aa1c3fe93100
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-pcie-phy.yaml
> @@ -0,0 +1,62 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/starfive,jh7110-usb-pcie-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive USB 2.0 and PCIe 2.0 PHY
> +
> +maintainers:
> +  - Minda Chen <minda.chen@starfivetech.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - starfive,jh7110-usb-phy
> +      - starfive,jh7110-pcie-phy
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#phy-cells":
> +    const: 0
> +
> +  clocks:
> +    items:
> +      - description: usb 125m clock
> +      - description: app 125m clock
> +
> +  clock-names:
> +    items:
> +      - const: 125m
> +      - const: app_125
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#phy-cells"
> +

It seems pci phy does not take these clocks, thus you should have
allOf:if:then which will customize it per variant. Otherwise binding is
incorrect for the pci.

> +additionalProperties: false
> +
> +examples:
> +  - |
> +    phy@10200000 {
> +      compatible = "starfive,jh7110-usb-phy";
> +      reg = <0x10200000 0x10000>;
> +      clocks = <&syscrg 95>,
> +               <&stgcrg 6>;
> +      clock-names = "125m", "app_125";
> +      #phy-cells = <0>;
> +    };
> +
> +    phy@10210000 {
> +      compatible = "starfive,jh7110-pcie-phy";
> +      reg = <0x10210000 0x10000>;
> +      #phy-cells = <0>;
> +    };
> +
> +    phy@10220000 {
> +      compatible = "starfive,jh7110-pcie-phy";
> +      reg = <0x10220000 0x10000>;
> +      #phy-cells = <0>;
> +    };

Drop duplicated examples. Keep usb and maybe one phy.

Best regards,
Krzysztof