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Re: [PATCH v6 2/2] of: Make of_find_node_by_path() traverse /aliases for

To: Grant Likely <>
Subject: Re: [PATCH v6 2/2] of: Make of_find_node_by_path() traverse /aliases for relative paths.
From: David Daney <>
Date: Fri, 09 Mar 2012 09:59:01 -0800
Cc: David Daney <>, "" <>, "" <>, "" <>, Rob Herring <>, "" <>
In-reply-to: <20120309013324.64DF53E0901@localhost>
References: <> <> <20120309013324.64DF53E0901@localhost>
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On 03/08/2012 05:33 PM, Grant Likely wrote:
On Wed, 29 Feb 2012 11:21:04 -0800, David Daney<>  wrote:
From: David Daney<>

Currently all paths passed to of_find_node_by_path() must begin with a
'/', indicating a full path to the desired node.

Augment the look-up code so that if a path does *not* begin with '/',
the path is used as the name of an /aliases property.  The value of
this alias is then used as the full node path to be found.

Signed-off-by: David Daney<>

All the aliases are already decoded at boot time now.  See
of_alias_scan().  Instead of open-coding this, you can add an
of_alias_lookup() function something like this (untested):

After objections from davem, and a bit of thought, I already indicated on a different branch of this thread that we should drop this patch.

I have improved my code so that it is no longer needed.

David Daney

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