From: "Robert P. J. Day" <rpjday@crashcourse.ca>
To: Linux PPC Mailing List <linuxppc-dev@lists.ozlabs.org>
Subject: for muram in DTS file, why change #address-cells from <1> to <2>?
Date: Tue, 17 May 2016 08:43:46 -0400 (EDT) [thread overview]
Message-ID: <alpine.LFD.2.20.1605170839440.3461@localhost.localdomain> (raw)
currently working on a project involving MPC8360 board, and was
handed a patch to the system .dts file that contained the following
snippet for the muram node:
muram@10000 {
- #address-cells = <1>;
+ #address-cells = <2>;
#size-cells = <1>;
compatible = "fsl,qe-muram", "fsl,cpm-muram";
- ranges = <0 0x10000 0xc000>;
+ ranges = <0 0 0x10000 0xc000>;
data-only@0 {
compatible = "fsl,qe-muram-data","fsl,cpm-muram-data";
- reg = <0 0xc000>;
+ reg = <0 0x4000 0x4000>, <0 0x9400 0x1c00>;
};
};
i'm not a .dts file expert, but i'm baffled by the change in the
value of #address-cells. how does that make any sense? it seems to me
that that kind of change is a *really* fundamental change in the
specification of the underlying architecture.
can someone explain what that might mean? thanks.
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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reply other threads:[~2016-05-17 12:44 UTC|newest]
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