From mboxrd@z Thu Jan  1 00:00:00 1970
From: Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCH 2/2] drivers/amba: probe via device tree
Date: Wed, 25 May 2011 11:07:18 +0200
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To: Rob Herring <robherring2@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>, Russell King - ARM Linux <linux@arm.linux.org.uk>, Kevin Hilman <khilman@ti.com>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "Rafael J. Wysocki" <rjw@sisk.pl>, Jeremy Kerr <jeremy.kerr@canonical.com>, devicetree-discuss@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org
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2011/5/24 Rob Herring <robherring2@gmail.com>:

> I think having "arm,amba-deviceid" is not needed. The current code does
> nothing but warn if it doesn't match the h/w value. The drivers already have
> a list of id's that they support and the amba bus only matches against the
> h/w id value. The only use I can see is overriding a broken h/w value.

We have this usecase in the Ux500. See these patches:
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=6829/1
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=6830/1

Alas, it's not yet merged for the old boardfile world usecase, and
causing us problems to drive our hardware already.

Yours,
Linus Walleij