linux-kernel - of overlay: how to insert new nodes with references to it

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Message-ID: <9b5a8e1f-6359-7658-4851-00d77d1cb8e5@metux.net>
Date:   Thu, 18 Feb 2021 10:14:03 +0100
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: of overlay: how to insert new nodes with references to it

Hello folks,

I'm trying to use an overlay to add several new nodes with references
between them (eg. a gpio controller and devices using the gpios).

Problem: dtc adds my new 'gpio1' node to the __fixups__ list, which is
used for resolving symbols against the live tree - obviously it can't
exist there, since it's added by the overlay. Therefore applying the
overlay fails:

     "OF: resolver: node label 'gpio1' not found in live devicetree
      symbols table"

Shouldn't the symbol be added to __local_fixups__ instead of __fixups__
?
How can I force dtc to do that ?

--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@...ux.net -- +49-151-27565287