From: Scott Wood <scottwood@freescale.com>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: Linuxppc-dev Development <linuxppc-dev@ozlabs.org>,
Timur Tabi <timur@freescale.com>
Subject: Re: removing get_immrbase()??
Date: Wed, 22 Apr 2009 16:38:02 -0500 [thread overview]
Message-ID: <49EF8E3A.4060304@freescale.com> (raw)
In-Reply-To: <282847E1-AE1A-44EF-9D18-AF2884105FA5@kernel.crashing.org>
Kumar Gala wrote:
> I disagree. If you update your kernel you should update your device
> tree (thus we have .dts in the kernel tree and not somewhere else).
No. The device tree is a means to pass information from the firmware to
the kernel. It is part of the firmware. That the repository of trees
is in the Linux kernel for any boards which are not including the tree
inside a bootwrapper is a historical accident.
Updating the dtb with the kernel just shifts the risk of incompatibility
to interactions between the firmware and the dtb. The same backwards
compatibility considerations when making kernel changes that depend on
firmware changes should be made when making kernel changes that depend
on dts changes.
-Scott
next prev parent reply other threads:[~2009-04-22 21:38 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-22 18:38 removing get_immrbase()?? Kumar Gala
2009-04-22 19:35 ` Timur Tabi
2009-04-22 20:16 ` Scott Wood
2009-04-22 20:16 ` Timur Tabi
2009-04-22 20:20 ` Scott Wood
2009-04-22 21:31 ` Kumar Gala
2009-04-22 21:33 ` Timur Tabi
2009-04-22 21:39 ` Kumar Gala
2009-04-22 21:46 ` Timur Tabi
2009-04-22 21:54 ` Kumar Gala
2009-04-22 21:57 ` Timur Tabi
2009-04-22 22:07 ` Kumar Gala
2009-04-22 22:00 ` Scott Wood
2009-04-22 22:00 ` Timur Tabi
2009-04-23 13:54 ` Grant Likely
2009-04-22 21:38 ` Scott Wood [this message]
2009-04-22 21:55 ` Kumar Gala
2009-04-22 22:33 ` Scott Wood
2009-04-23 0:03 ` Timur Tabi
2009-04-23 2:26 ` David Gibson
2009-04-23 3:36 ` Kumar Gala
2009-04-23 4:06 ` David Gibson
2009-04-23 4:41 ` Kumar Gala
2009-04-28 4:12 ` David Gibson
2009-04-28 13:48 ` Timur Tabi
2009-04-23 13:07 ` Timur Tabi
2009-04-23 15:56 ` Scott Wood
2009-04-23 13:02 ` Timur Tabi
2009-04-23 13:50 ` Anton Vorontsov
2009-04-23 14:02 ` Timur Tabi
2009-04-23 14:06 ` Kumar Gala
2009-04-23 14:09 ` Timur Tabi
2009-04-24 14:40 ` Wrobel Heinz-R39252
2009-04-23 14:13 ` Anton Vorontsov
2009-04-23 16:00 ` Scott Wood
2009-04-23 16:54 ` Anton Vorontsov
2009-04-23 17:03 ` Scott Wood
2009-04-23 17:26 ` Anton Vorontsov
2009-04-23 17:59 ` Scott Wood
2009-04-28 4:25 ` David Gibson
2009-04-28 4:21 ` David Gibson
2009-04-23 13:53 ` Grant Likely
2009-04-23 14:03 ` Anton Vorontsov
2009-04-28 4:26 ` David Gibson
2009-04-22 19:44 ` Scott Wood
2009-04-22 20:00 ` Kumar Gala
2009-04-22 20:30 ` Scott Wood
2009-04-23 13:53 ` Arnd Bergmann
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