linux-kernel - Re: [PATCH v3 2/6] dt-bindings: phy: qcom,m31: Document qcom,m31 USB phy

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Message-ID: <8e5a51cb-c726-1027-1f4c-7870b10bc706@linaro.org>
Date:   Tue, 11 Jul 2023 11:03:38 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Varadarajan Narayanan <quic_varada@...cinc.com>, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...aro.org, vkoul@...nel.org,
        kishon@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        gregkh@...uxfoundation.org, catalin.marinas@....com,
        will@...nel.org, p.zabel@...gutronix.de, arnd@...db.de,
        geert+renesas@...der.be, neil.armstrong@...aro.org,
        nfraprado@...labora.com, broonie@...nel.org, rafal@...ecki.pl,
        quic_srichara@...cinc.com, quic_varada@...cinc.org,
        quic_wcheng@...cinc.com, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 2/6] dt-bindings: phy: qcom,m31: Document qcom,m31 USB
 phy

On 11/07/2023 10:51, Varadarajan Narayanan wrote:
> Document the M31 USB2 phy present in IPQ5332.
> 
> Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
> Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> ---
> v3:
> 	Incorporate review comments. Will bring in ipq5018 compatible
> 	string while posting ipq5018 usb patchset.
> 
> v1:
> 	Rename qcom,m31.yaml -> qcom,ipq5332-usb-hsphy.yaml
> 	Drop default binding "m31,usb-hsphy"
> 	Add clock
> 	Remove 'oneOf' from compatible
> 	Remove 'qscratch' region from register space as it is not needed
> 	Remove reset-names
> 	Fix the example definition
> ---
>  .../bindings/phy/qcom,ipq5332-usb-hsphy.yaml       | 49 ++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml b/Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml
> new file mode 100644
> index 0000000..2cfdd73
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml
> @@ -0,0 +1,49 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/qcom,ipq5332-usb-hsphy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: M31 (https://www.m31tech.com) USB PHY

The URL should rather go to description, not the title. Title is like
document title.

> +
> +maintainers:
> +  - Sricharan Ramabadhran <quic_srichara@...cinc.com>
> +  - Varadarajan Narayanan <quic_varada@...cinc.org>
> +
> +description:
> +  USB M31 PHY found in Qualcomm IPQ5018, IPQ5332 SoCs.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,ipq5332-usb-hsphy
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    maxItems: 1

Drop

> +    contains:

Drop

> +      items:
> +        - const: cfg_ahb
> +
> +  resets:
> +    maxItems: 1
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,ipq5332-gcc.h>
> +    usbphy0: ipq5332-hsphy@...00 {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

Best regards,
Krzysztof