From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Subject: Re: [linux-sunxi] Re: [PATCH 4/6] ARM: dts: sun7i: Enable USB DRC on pcDuino 3 Date: Thu, 20 Aug 2015 09:36:33 +0200 Message-ID: <55D58381.7040801@redhat.com> References: <1439563477-12295-1-git-send-email-hdegoede@redhat.com> <1439563477-12295-5-git-send-email-hdegoede@redhat.com> <20150820064545.GM30520@lukather> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150820064545.GM30520@lukather> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Maxime Ripard Cc: Jelle van der Waa , Ralph Willekes , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree , linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org List-Id: devicetree@vger.kernel.org Hi, On 08/20/2015 08:45 AM, Maxime Ripard wrote: > On Fri, Aug 14, 2015 at 04:44:35PM +0200, Hans de Goede wrote: >> From: Jelle van der Waa >> >> Enable the otg/drc usb controller on the pcDuino 3. >> >> Note this board has the otg-vbus connected directly to the 5v-dcc of >> the board, so there is no vbus0 regulator, nor vbus0-det. > > Can it do OTG then? Yes. > If VBUS is tied to the 5v, there's no way for the > board to shut it down when acting as peripheral, right? Correct, the idea is to power it over otg when using it as a peripheral, or at least power it from a usb port of the machine for which it is a peripheral. Note that the original cubieboard (both A10 and A20 versions) have the same issue. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html