From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Chen <peter.chen@freescale.com>
Subject: Re: [PATCH] ARM: dts: imx5: Add dts files for USB armory.
Date: Thu, 30 Apr 2015 16:51:12 +0800
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To: Fabio Estevam <festevam@gmail.com>
Cc: Shawn Guo <shawn.guo@linaro.org>, Vagrant Cascadian <vagrant@debian.org>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Kumar Gala <galak@codeaurora.org>, Russell King <linux@arm.linux.org.uk>, Sascha Hauer <kernel@pengutronix.de>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, linux-kernel <linux-kernel@vger.kernel.org>
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On Wed, Apr 29, 2015 at 11:22:11PM -0300, Fabio Estevam wrote:
> Hi Peter,
> 
> On Tue, Apr 28, 2015 at 5:20 AM, Peter Chen <peter.chen@freescale.com> wrote:
> 
> > Current chipidea usb driver supports role switch function well, if you
> > have a gpio or id pin for it.
> 
> On mx6 we are able to perform OTG role-switch funtion as they have the
> OTG_ID pins.
> 
> We are talking about mx53 here, which does not have such OTG_ID pins,
> so not sure how they can perform role-switch in run-time?
> 

Using gpio as extcon, lvan is working on patch for that

http://www.spinics.net/lists/linux-usb/msg123903.html

-- 

Best Regards,
Peter Chen