From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
Date: Thu, 17 Feb 2011 11:49:16 +0000
Subject: [PATCH 1/2] omap4: 4430sdp: drop ehci support
In-Reply-To: <1297855040-1337-1-git-send-email-gadiyar@ti.com>
References: <1297855040-1337-1-git-send-email-gadiyar@ti.com>
Message-ID: <20110217114916.GA24989@n2100.arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Feb 16, 2011 at 04:47:19PM +0530, Anand Gadiyar wrote:
> Most revisions of the OMAP4 Blaze/SDP platform do not have
> the EHCI signals routed by default. The pads are routed
> for the alternate HSI functionality instead, and explicit
> board modifications are needed to route the signals to
> the USB PHY on the board.
> 
> Also, turning on the PHY connected to the EHCI port causes
> a board reboot during bootup due to an unintended short
> on the rails - this affects many initial revisions of the
> board, and needs a minor board mod to fix (or as a
> workaround, one should not attempt to power on the
> USB PHY).

It's probably a good idea to put some comment in the code to that
effect - people don't generally look at the history when adding new
features.  It's probably also a good idea to claim the GPIO for the
PHY power control and ensure that it's set to 'off' mode - that code
can then be a placeholder for the comment.