linux-kernel - Re: [PATCH] musb: move usb_add_hcd to the core init code from gadget code (v2)

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Message-ID: <20110110115714.GA5573@legolas.emea.dhcp.ti.com>
Date:	Mon, 10 Jan 2011 13:57:14 +0200
From:	Felipe Balbi <balbi@...com>
To:	Brad Parker <brad@...ltoe.com>
Cc:	bryan.wu@...onical.com, felipe.balbi@...ia.com,
	linux-usb@...r.kernel.org, david-b@...bell.net,
	kernel-team@...ts.ubuntu.com, linux-kernel@...r.kernel.org,
	ricardo.salveti@...onical.com, linux-omap@...r.kernel.org
Subject: Re: [PATCH] musb: move usb_add_hcd to the core init code from
 gadget code (v2)

Hi,

On Mon, Jan 10, 2011 at 06:47:58AM -0500, Brad Parker wrote:
> I know this is a top post, and a comment on a post from August, but I'd like
> to point out that without this patch I can't get musb host mode to work
> on the beagle board xm (3630).
> 
> With this patch, host mode works.  If I disconnect and reconnect the port
> goes into "a_idle", which is almost right, and will go into host mode if
> I "echo >/sys/devices/platform/musb_hdrc/mode".
> 
> (my expectation is that the mode should toggle from "b_idle" to "a_host"
> when I plug in an a connector with the id pin tied correctly, and
> back to "b_idle"
> when I disconnect)
> 
> It seems like few people people test host mode on the omap twl otg port,
> but I have applications which use it...
> 
> should this patch get more attention?  (there was no response to the
> initial post I could find)

What's the problem in simply insmoding a gadget driver ? If you have OTG
enabled, you _need_ a gadget driver to have a fully working setup. If
you want host only, then change Kconfig.

-- 
balbi
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