linux-kernel - Re: [PATCH] Allow MUSB DSPS to use "force host" mode

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Message-ID: <528F8741.1060406@linutronix.de>
Date:	Fri, 22 Nov 2013 17:33:05 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Mark Jackson <mpfj-list@...flow.co.uk>
CC:	linux-usb@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	Felipe Balbi <balbi@...com>,
	Greg KH <gregkh@...uxfoundation.org>, jkosina@...e.cz,
	anatol.pomozov@...il.com,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	Bin Liu <binmlist@...il.com>
Subject: Re: [PATCH] Allow MUSB DSPS to use "force host" mode

On 11/22/2013 04:55 PM, Mark Jackson wrote:
> The IDDIG input pin is normally used to determine the USB mode
> (i.e. HOST or DEVICE).
> 
> On some systems (e.g. AM335x) leaving this pin floating allows
> the USB mode to be set via software.

So you have a board where musb is used only as host or only as device
and the ID pin not on ground or 3.3V?
What are the side effects? I remember correctly Bin wanted to avoid
settings this if it could be avoided.

Sebastian
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