linux-kernel - Re: [PATCH 7/9] arm64: dts: qcom: ipq5332: Add USB related nodes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230615065240.GI22186@varda-linux.qualcomm.com>
Date:   Thu, 15 Jun 2023 12:22:41 +0530
From:   Varadarajan Narayanan <quic_varada@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
CC:     <agross@...nel.org>, <andersson@...nel.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>, <mturquette@...libre.com>, <sboyd@...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>, <linux-clk@...r.kernel.org>
Subject: Re: [PATCH 7/9] arm64: dts: qcom: ipq5332: Add USB related nodes

On Wed, Jun 07, 2023 at 08:24:04PM +0200, Konrad Dybcio wrote:
>
>
> On 7.06.2023 12:56, Varadarajan Narayanan wrote:
> > Add USB phy and controller nodes
> >
> > Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> > ---
> >  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 55 +++++++++++++++++++++++++++++++++++
> >  1 file changed, 55 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > index c2d6cc65..3183357 100644
> > --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > @@ -383,6 +383,61 @@
> >  				status = "disabled";
> >  			};
> >  		};
> > +
> > +		usb_0_m31phy: hs_m31phy@...00 {
> > +			compatible = "qcom,ipq5332-m31-usb-hsphy";
> > +			reg = <0x0007b000 0x12C>,
> random uppercase hex

Ok.

> > +			      <0x08af8800 0x400>;
> > +			reg-names = "m31usb_phy_base",
> > +				    "qscratch_base";
> > +			phy_type= "utmi";
> Missing space before '='

Ok.

> > +
> > +			resets = <&gcc GCC_QUSB2_0_PHY_BCR>;
> > +			reset-names = "usb2_phy_reset";
> > +
> > +			status = "okay";
> If you're only defining the node, it's enabled by default
>
> In this case, you'd probably want to disable it by default.

Ok.

> > +		};
> > +
> > +		usb2: usb2@...0000 {
> > +			compatible = "qcom,ipq5332-dwc3", "qcom,dwc3";
> > +			#address-cells = <1>;
> > +			#size-cells = <1>;
> > +			ranges;
> Please push these 3 properties to the end
>
> And add status = "disabled" below them.

Ok.

> > +
> > +			reg = <0x08af8800 0x100>;
> > +
> > +			clocks = <&gcc GCC_USB0_MASTER_CLK>,
> > +				<&gcc GCC_SNOC_USB_CLK>,
> > +				<&gcc GCC_USB0_SLEEP_CLK>,
> > +				<&gcc GCC_USB0_MOCK_UTMI_CLK>;
> > +
> Please remove this newline.
>
> > +			clock-names = "core",
> > +				"iface",
> > +				"sleep",
> > +				"mock_utmi";
> Please align this, and all other similar lists.

Ok.

> > +
> > +			interrupts-extended = <&intc GIC_SPI 134 IRQ_TYPE_LEVEL_HIGH>;
> interrupts-extended is unnecessary with just a single interrupt
> source.. you can make it `interrupts` and drop the GIC reference.
>
> It would also be nice to push the interrupt properties below 'reg'.
> We're working on documenting and automating checking the preferred
> property order.

Ok.

> > +			interrupt-names = "pwr_event";
> > +
> > +			resets = <&gcc GCC_USB_BCR>;
> > +
> > +			qcom,select-utmi-as-pipe-clk;
> > +
> > +			usb2_0_dwc: usb@...0000 {
> > +				compatible = "snps,dwc3";
> > +				reg = <0x08a00000 0xe000>;
> > +				clocks = <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> > +				clock-names = "ref";
> > +				interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
> > +				usb-phy = <&usb_0_m31phy>;
> > +				tx-fifo-resize;
> > +				snps,is-utmi-l1-suspend;
> > +				snps,hird-threshold = /bits/ 8 <0x0>;
> > +				snps,dis_u2_susphy_quirk;
> > +				snps,dis_u3_susphy_quirk;
> > +				snps,ref-clock-period-ns = <21>;
> 1/21 is 0.0476..  that doesn't seem to correspond to the ref
> clk frequency?

dwc3_ref_clk_period() prefers ref clock's rate over ref-clock-period-ns.
Since ref clock is available this is not used. Will remove this.

Thanks
Varada

> Konrad
> > +			};
> > +		};
> >  	};
> >
> >  	timer {