From mboxrd@z Thu Jan 1 00:00:00 1970 From: hdegoede@redhat.com (Hans de Goede) Date: Fri, 2 Dec 2016 15:30:26 +0100 Subject: [PATCH v2 2/3] ARM: dts: sunxi: add support for Orange Pi Zero board In-Reply-To: <11498641480688550@web2g.yandex.ru> References: <20161121162421.800-1-icenowy@aosc.xyz> <20161121162421.800-2-icenowy@aosc.xyz> <5373671480239408@web31m.yandex.ru> <20161201093619.gs6lmoxtlptp2jr6@lukather> <11498641480688550@web2g.yandex.ru> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, On 02-12-16 15:22, Icenowy Zheng wrote: > > > 01.12.2016, 17:36, "Maxime Ripard" : >> On Mon, Nov 28, 2016 at 12:29:07AM +0000, Andr? Przywara wrote: >>> > Something more interesting happened. >>> > >>> > Xunlong made a add-on board for Orange Pi Zero, which exposes the >>> > two USB Controllers exported at expansion bus as USB Type-A >>> > connectors. >>> > >>> > Also it exposes a analog A/V jack and a microphone. >>> > >>> > Should I enable {e,o}hci{2.3} in the device tree? >>> >>> Actually we should do this regardless of this extension board. The USB >>> pins are not multiplexed and are exposed on user accessible pins (just >>> not soldered, but that's a detail), so I think they qualify for DT >>> enablement. And even if a user can't use them, it doesn't hurt to have >>> them (since they are not multiplexed). >> >> My main concern about this is that we'll leave regulators enabled by >> default, for a minority of users. And that minority will prevent to do >> a proper power management when the times come since we'll have to keep >> that behaviour forever. > > I think these users can add a 'fdt set /xxx/xxx status "disabled" ' . I don't think that will be necessary I'm pretty sure these extra usb ports do not have a regulator for the Vbus, they just hook directly to the 5V rail, can someone with a schematic check ? Regards, Hans