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Message-ID: <ddd97ecd-bf4b-85c8-1f0b-8ca175799076@linaro.org>
Date:   Tue, 11 Jul 2023 11:01:03 +0200
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Subject: Re: [PATCH v3 4/6] arm64: dts: qcom: ipq5332: Add USB related nodes
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To:     Varadarajan Narayanan <quic_varada@quicinc.com>, agross@kernel.org,
        andersson@kernel.org, konrad.dybcio@linaro.org, vkoul@kernel.org,
        kishon@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        gregkh@linuxfoundation.org, catalin.marinas@arm.com,
        will@kernel.org, p.zabel@pengutronix.de, arnd@arndb.de,
        geert+renesas@glider.be, neil.armstrong@linaro.org,
        nfraprado@collabora.com, broonie@kernel.org, rafal@milecki.pl,
        quic_srichara@quicinc.com, quic_varada@quicinc.org,
        quic_wcheng@quicinc.com, linux-arm-msm@vger.kernel.org,
        linux-phy@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
References: <cover.1689065318.git.quic_varada@quicinc.com>
 <23b259b72c8f6faad99f09c37ac8b7b6b027cea1.1689065318.git.quic_varada@quicinc.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <23b259b72c8f6faad99f09c37ac8b7b6b027cea1.1689065318.git.quic_varada@quicinc.com>
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Precedence: bulk

On 11/07/2023 10:51, Varadarajan Narayanan wrote:
> Add USB phy and controller nodes.
> 
> Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> ---
> v1:
> 	Rename phy node

I don't see any improvements.

> 	Change compatible from m31,ipq5332-usb-hsphy -> qcom,ipq5332-usb-hsphy
> 	Remove 'qscratch' from phy node
> 	Fix alignment and upper-case hex no.s
> 	Add clock definition for the phy
> 	Remove snps,ref-clock-period-ns as it is not used. dwc3_ref_clk_period()
> 	in dwc3/core.c takes the frequency from ref clock and calculates fladj
> 	as appropriate.
> ---
>  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 54 +++++++++++++++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> index 8bfc2db..c945ff6 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> @@ -405,6 +405,60 @@
>  				status = "disabled";
>  			};
>  		};
> +
> +		usbphy0: ipq5332-hsphy@7b000 {

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

"phy"


> +			compatible = "qcom,ipq5332-usb-hsphy";
> +			reg = <0x0007b000 0x12c>;
> +
> +			clocks = <&gcc GCC_USB0_PHY_CFG_AHB_CLK>;
> +			clock-names = "cfg_ahb";
> +
> +			resets = <&gcc GCC_QUSB2_0_PHY_BCR>;
> +
> +			status = "disabled";
> +		};
> +
> +		usb2: usb2@8a00000 {

It does not look like you tested the DTS against bindings. Please run
`make dtbs_check` (see
Documentation/devicetree/bindings/writing-schema.rst or
https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/
for instructions).

> +			compatible = "qcom,ipq5332-dwc3", "qcom,dwc3";
> +

No need for blank line.

> +			reg = <0x08af8800 0x400>;
> +
> +			interrupts = <GIC_SPI 62 IRQ_


Best regards,
Krzysztof