linux-kernel - Re: USB Ethernet gadget on Nokia n900

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Date:	Tue, 28 Oct 2014 15:11:25 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Felipe Balbi <balbi@...com>, sre@...ian.org, sre@...g0.de,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org
Subject: Re: USB Ethernet gadget on Nokia n900

* Pavel Machek <pavel@....cz> [141028 15:06]:
> Hi!
> 
> > Here's a patch that should fix the issues for built-in USB
> > gadgets.
> > 
> > Pavel, care to see if this gets NFSroot over USB working again
> > for you?
> 
> It seems to have did the trick for me. (Plus I needed to add
> 
> +CONFIG_ARM_ATAG_DTB_COMPAT=y
> +CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER=y
> +# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
> 
> to be able to control the command line, that's why testing took me a
> while.)

Hmm I think I have a patch somewhere here to enable the standard
bootz command for n900 mainline u-boot.. That way you can just do

# bootz ${loadaddr} - ${fdtaddr}
 
> Networking now works against 3.17-based kernel. Thanks!

Right on! Ideally the gadget probe would be event driven and called
after USB controller driver probe. But that would mean keeping a
list of all the gadgets as Felipe told me.
 
> Tested-by: Pavel Machek <pavel@....cz>

Thanks for testing,

Tony
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