linux-kernel - Re: [PATCH v1] usb: dwc3: enable otg mode for dwc3 usb ip on layerscape

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Date:   Sat, 5 Oct 2019 21:58:12 -0500
From:   Li Yang <leoyang.li@....com>
To:     Shawn Guo <shawnguo@...nel.org>
Cc:     Yinbo Zhu <yinbo.zhu@....com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Xiaobo Xie <xiaobo.xie@....com>,
        Jiafei Pan <jiafei.pan@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org>,
        Ran Wang <ran.wang_1@....com>
Subject: Re: [PATCH v1] usb: dwc3: enable otg mode for dwc3 usb ip on layerscape

On Sat, Oct 5, 2019 at 9:56 PM Shawn Guo <shawnguo@...nel.org> wrote:
>
> On Mon, Sep 09, 2019 at 05:02:44PM +0800, Yinbo Zhu wrote:
> > layerscape otg function should be supported HNP SRP and ADP protocol
> > accroing to rm doc, but dwc3 code not realize it and use id pin to
> > detect who is host or device(0 is host 1 is device) this patch is to
> > enable OTG mode on ls1028ardb ls1088ardb and ls1046ardb in dts
> >
> > Signed-off-by: Yinbo Zhu <yinbo.zhu@....com>
>
> The patch prefix should be something like: 'arm64: dts: ...'
>
> @Leo, do you agree with the changes?

No.  The USB mode of operation should be defined at board level.

>
> Shawn
>
> > ---
> >  arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 2 +-
> >  arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi | 2 +-
> >  arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi | 2 +-
> >  3 files changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> > index 7975519b4f56..5810d0400dbc 100644
> > --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> > @@ -320,7 +320,7 @@
> >                       compatible = "fsl,ls1028a-dwc3", "snps,dwc3";
> >                       reg = <0x0 0x3110000 0x0 0x10000>;
> >                       interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
> > -                     dr_mode = "host";
> > +                     dr_mode = "otg";
> >                       snps,dis_rxdet_inp3_quirk;
> >                       snps,quirk-frame-length-adjustment = <0x20>;
> >                       snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
> > diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > index b0ef08b090dd..ecce6151b9b0 100644
> > --- a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > @@ -582,7 +582,7 @@
> >                       compatible = "snps,dwc3";
> >                       reg = <0x0 0x3000000 0x0 0x10000>;
> >                       interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
> > -                     dr_mode = "host";
> > +                     dr_mode = "otg";
> >                       snps,quirk-frame-length-adjustment = <0x20>;
> >                       snps,dis_rxdet_inp3_quirk;
> >                       snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
> > diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
> > index dacd8cf03a7f..4b5413f7c90c 100644
> > --- a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
> > @@ -385,7 +385,7 @@
> >                       compatible = "snps,dwc3";
> >                       reg = <0x0 0x3110000 0x0 0x10000>;
> >                       interrupts = <0 81 IRQ_TYPE_LEVEL_HIGH>;
> > -                     dr_mode = "host";
> > +                     dr_mode = "otg";
> >                       snps,quirk-frame-length-adjustment = <0x20>;
> >                       snps,dis_rxdet_inp3_quirk;
> >                       status = "disabled";
> > --
> > 2.17.1
> >