linux-kernel - Re: [PATCH v2] usb: dwc3: enable otg mode for dwc3 usb ip on layerscape

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Message-ID: <20191014065210.GE12262@dragon>
Date:   Mon, 14 Oct 2019 14:52:12 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Yinbo Zhu <yinbo.zhu@....com>
Cc:     Li Yang <leoyang.li@....com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, xiaobo.xie@....com,
        jiafei.pan@....com, Ran Wang <ran.wang_1@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] usb: dwc3: enable otg mode for dwc3 usb ip on
 layerscape

On Tue, Sep 24, 2019 at 11:29:03AM +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>
> ---
>  arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts | 4 ++++
>  arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts | 4 ++++
>  arch/arm64/boot/dts/freescale/fsl-ls1088a-rdb.dts | 1 +

This is an arm64 DTS patch, so the patch prefix should be something
like 'arm64 dts: fsl: ...'

Shawn

>  3 files changed, 9 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> index 9fb9113..076cac6 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> @@ -171,3 +171,7 @@
>  &sata {
>  	status = "okay";
>  };
> +
> +&usb1 {
> +	dr_mode = "otg";
> +};
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
> index 6a6514d..0c742be 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
> @@ -122,6 +122,10 @@
>  	};
>  };
>  
> +&usb1 {
> +	dr_mode = "otg";
> +};
> +
>  #include "fsl-ls1046-post.dtsi"
>  
>  &fman0 {
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1088a-rdb.dts
> index 8e925df..90b1989 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1088a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a-rdb.dts
> @@ -95,5 +95,6 @@
>  };
>  
>  &usb1 {
> +	dr_mode = "otg";
>  	status = "okay";
>  };
> -- 
> 2.9.5
>