linux-kernel - Re: [PATCH] of: address: Don't fail a lookup just because a node has no reg property

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Date:	Thu, 5 Jul 2012 16:38:04 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	STEricsson_nomadik_linux@...t.st.com, linus.walleij@...ricsson.com,
	arnd@...db.de, grant.likely@...retlab.ca, rob.herring@...xeda.com,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH] of: address: Don't fail a lookup just because a node has
 no reg property

On Thu, Jul 5, 2012 at 4:32 PM, Lee Jones <lee.jones@...aro.org> wrote:

> Sometimes it doesn't make any sense for a node to have an address.
> In this case device lookup will always be unsuccessful because we
> currently assume every node will have a reg property. This patch
> changes the semantics so that the resource address and the lookup
> address will only be compared if one exists.
>
> Things like AUXDATA() rely on of_dev_lookup to return the lookup
> entry of a particular device in order to do things like apply
> platform_data to a device. However, this is currently broken for
> nodes which do not have a reg property, meaning that platform_data
> can not be passed in those cases.
>
> Acked-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>

I sure see the problem!
Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij
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