linux-kernel - Re: [PATCH] ARM: tegra: colibri t30: fix on-module ethernet

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Date:	Fri, 21 Nov 2014 12:57:52 +0100
From:	Marcel Ziswiler <marcel@...wiler.com>
To:	swarren@...dotorg.org
Cc:	thierry.reding@...il.com, linux@....linux.org.uk,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
	stefan@...er.ch
Subject: Re: [PATCH] ARM: tegra: colibri t30: fix on-module ethernet

On Fri, 2014-11-21 at 11:41 +0100, Marcel Ziswiler wrote:
> Looks like Ethernet only ever worked if U-Boot properly brought it up
> as both the reset as well as the VBUS lines were not actively handled
> in-kernel.
> This patch fixes this by just pulling up the reset GPIO

Doing automatic power-cycle tests revealed that this is still not enough
and a proper reset-cycle might be required. However I don't know as of
yet how one can easily do that in mainline with a USB device otherwise
not mentioned anywhere in the device tree. Any ideas?

> and properly
> enabling VBUS via a GPIO enabled fixed regulator VBUS supply.
> 
> Signed-off-by: Marcel Ziswiler <marcel@...wiler.com>

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