linux-kernel - Re: [PATCH] ARM: dts: imx5: Add dts files for USB armory.

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Message-ID: <20150430085111.GB12957@shlinux2>
Date:	Thu, 30 Apr 2015 16:51:12 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Fabio Estevam <festevam@...il.com>
CC:	Shawn Guo <shawn.guo@...aro.org>,
	Vagrant Cascadian <vagrant@...ian.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	"Sascha Hauer" <kernel@...gutronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: imx5: Add dts files for USB armory.

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@...escale.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
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