linux-kernel - Re: [PATCH v2] arm64: allwinner: a64: orangepi-zero-plus2: add usb otg

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Date:   Mon, 15 Jan 2018 09:01:39 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, Icenowy Zheng <icenowy@...c.io>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2] arm64: allwinner: a64: orangepi-zero-plus2: add usb
 otg

Hi,

On Fri, Jan 12, 2018 at 02:39:04PM +0530, Jagan Teki wrote:
> Add usb otg support for orangepi-zero-plus2 board:
> - Add usb_otg node with dr_mode as 'otg'
> - USB0-IDDET connected to PA21
> - VBUS connected through DCIN which always on
> 
> Tested mass storage function.
> 
> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> ---
> Changes for v2:
> - Change dr_mode to peripheral
> 
>  .../dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts    | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts
> index af43533..6511190 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts
> @@ -73,6 +73,10 @@
>  	};
>  };
>  
> +&ehci0 {
> +	status = "okay";
> +};
> +
>  &mmc0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&mmc0_pins_a>;
> @@ -111,6 +115,10 @@
>  	status = "okay";
>  };
>  
> +&ohci0 {
> +	status = "okay";
> +};
> +
>  &uart0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&uart0_pins_a>;
> @@ -122,3 +130,13 @@
>  	pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
>  	status = "okay";
>  };
> +
> +&usb_otg {
> +	dr_mode = "peripheral";

If VBUS is always on, this can only operate safely in host mode, not
peripheral.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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