linux-kernel - Re: [linux-sunxi] [PATCH v4 7/8] ARM: sun8i: h2+: enable USB OTG for Orange Pi Zero board

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Message-ID: <CAGb2v65sWjn9RWTgv4U00_1h9bgmYPY8mNbx9hAy5Cd0dyxxyA@mail.gmail.com>
Date:   Fri, 24 Mar 2017 10:57:54 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Icenowy Zheng <icenowy@...c.xyz>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Hans de Goede <hdegoede@...hat.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH v4 7/8] ARM: sun8i: h2+: enable USB OTG for
 Orange Pi Zero board

On Mon, Mar 20, 2017 at 12:31 AM, Icenowy Zheng <icenowy@...c.xyz> wrote:
> Orange Pi Zero board features a USB OTG port, which has a ID pin, and
> can be used to power up the board. However, even if the board is powered
> via +5V pin in GPIO/expansion headers, the VBUS in the OTG port cannot
> be powered up, thus it's impossible to use it in host mode with simple
> OTG cables.
>
> Add support for it in peripheral mode.
>
> If someone really want to use it in host mode, the mode of PHY can be
> switch via sysfs, then use a powered USB OTG cable or powered USB HUB to
> power up external USB devices.
>
> Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>

Acked-by: Chen-Yu Tsai <wens@...e.org>