From: Segher Boessenkool <segher@kernel•crashing.org>
To: Paul Mackerras <paulus@samba•org>
Cc: David Gibson <david@gibson•dropbear.id.au>,
Yoder Stuart-B08248 <stuart.yoder@freescale•com>,
linuxppc-dev@ozlabs•org
Subject: Re: [PATCH 15/16] Add device tree for Ebony
Date: Thu, 15 Feb 2007 03:43:05 +0100 [thread overview]
Message-ID: <6c90a73251f09d619498c77264a15fef@kernel.crashing.org> (raw)
In-Reply-To: <17875.49565.444870.924729@cargo.ozlabs.ibm.com>
>> Exactly. The "separate device tree" imitates a real OF,
>> so you will lose much of its value if you start to deviate
>> from how real OF works.
>
> I disagree. It was never (and isn't now) the intention to put all of
> the OF requirements on the device tree supplied on OF-less systems.
That's not my point; I'm saying that you shouldn't do the
same (or similar) things in different ways than "real OF"
does.
> In other words, "we should do X because the bindings require it" isn't
> of itself an argument for making X a requirement on the device tree.
It's a pretty strong indicator though; all other things
being equal, you should do what the bindings say. There
can be good reasons to do differently, but then you better
have those reasons :-)
> "We should do X because there are good technical reasons for doing it
> that way" is. "We should do X because if we don't then device trees
> from real OF systems won't be compatible" is also a reasonable
> argument.
You're turning the argument around, but hey :-)
> The device tree is required because it is a flexible way to give
> useful information to the kernel. Thus the focus is quite properly on
> what is useful (or at least potentially useful) to the Linux kernel,
> not on what some binding document says.
Still, if you want to be compatible to "real OF" (and you
do, otherwise you would have chosen a structure that is
more appropriate for this goal), you better *be* compatible
to OF.
Segher
next prev parent reply other threads:[~2007-02-15 2:43 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-13 6:09 [0/16] Preliminary Ebony (440GP) support for arch/powerpc David Gibson
2007-02-13 6:10 ` [PATCH 4/16] powerpc: Allow duplicate lmb_reserve() calls David Gibson
2007-02-13 7:05 ` Michael Neuling
2007-02-13 8:48 ` Michael Ellerman
2007-02-13 20:44 ` Benjamin Herrenschmidt
2007-02-13 6:10 ` [PATCH 5/16] powerpc: Add zImage platform hook for kernel address David Gibson
2007-02-13 6:10 ` [PATCH 1/16] Remove ibm4{xx,4x}.h from arch/powerpc David Gibson
2007-02-13 14:19 ` Josh Boyer
2007-02-13 6:10 ` [PATCH 3/16] [powerpc] Use udbg_early_init() on ppc32 David Gibson
2007-02-13 6:22 ` Benjamin Herrenschmidt
2007-02-13 6:10 ` [PATCH 7/16] Early serial debug support for PPC44x David Gibson
2007-02-13 15:04 ` Josh Boyer
2007-02-14 0:16 ` David Gibson
2007-02-14 1:02 ` Josh Boyer
2007-02-14 1:00 ` David Gibson
2007-02-14 2:00 ` Alan Modra
2007-02-14 2:02 ` David Gibson
2007-02-14 2:38 ` Alan Modra
2007-02-14 15:41 ` Josh Boyer
2007-02-14 23:05 ` David Gibson
2007-02-13 6:10 ` [PATCH 6/16] Port 44x MMU definitions to ARCH=powerpc David Gibson
2007-02-13 6:24 ` Benjamin Herrenschmidt
2007-02-13 17:13 ` Roland Dreier
2007-02-13 17:45 ` Josh Boyer
2007-02-13 21:36 ` Benjamin Herrenschmidt
2007-02-13 6:10 ` [PATCH 2/16] More DCR native fixups David Gibson
2007-02-13 6:22 ` Benjamin Herrenschmidt
2007-02-13 6:10 ` [PATCH 8/16] Define FIXED_PORT flag for serial_core David Gibson
2007-02-13 6:10 ` [PATCH 10/16] Add support for BSS stack for zImage wrapper David Gibson
2007-02-13 6:10 ` [PATCH 12/16] Automatically lmb_reserve() initrd David Gibson
2007-02-13 7:14 ` Michael Neuling
2007-02-13 6:10 ` [PATCH 13/16] Add initrd properties to device tree from zImage David Gibson
2007-02-13 6:10 ` [PATCH 9/16] Use resource_size_t for serial port IO addresses David Gibson
2007-02-13 6:10 ` [PATCH 11/16] zImage wrapper for Ebony David Gibson
2007-02-13 17:05 ` Geoff Levand
2007-02-14 0:17 ` David Gibson
2007-02-13 6:10 ` [PATCH 14/16] Add arch/powerpc driver for UIC, PPC4xx interrupt controller David Gibson
2007-02-13 6:10 ` [PATCH 16/16] Support for Ebony in arch/powerpc David Gibson
2007-02-13 17:18 ` Roland Dreier
2007-02-14 0:20 ` David Gibson
2007-02-13 6:10 ` [PATCH 15/16] Add device tree for Ebony David Gibson
2007-02-13 20:08 ` Segher Boessenkool
2007-02-14 0:22 ` David Gibson
2007-02-14 1:51 ` Benjamin Herrenschmidt
2007-02-14 4:46 ` David Gibson
2007-02-14 17:54 ` Segher Boessenkool
2007-02-14 23:18 ` David Gibson
2007-02-15 0:25 ` Segher Boessenkool
2007-02-14 17:51 ` Segher Boessenkool
2007-02-14 17:48 ` Segher Boessenkool
2007-02-14 21:30 ` Benjamin Herrenschmidt
2007-02-15 0:03 ` Segher Boessenkool
2007-02-15 0:53 ` Benjamin Herrenschmidt
2007-02-15 1:00 ` Segher Boessenkool
2007-02-15 2:22 ` Benjamin Herrenschmidt
2007-02-15 2:51 ` Segher Boessenkool
2007-02-14 23:17 ` David Gibson
2007-02-15 0:27 ` Segher Boessenkool
2007-02-15 14:02 ` Jon Loeliger
2007-02-15 14:56 ` Segher Boessenkool
2007-02-15 17:02 ` Yoder Stuart-B08248
2007-02-15 17:10 ` Scott Wood
2007-02-16 9:20 ` Segher Boessenkool
2007-02-14 16:14 ` Yoder Stuart-B08248
2007-02-14 16:32 ` Josh Boyer
2007-02-14 17:58 ` Segher Boessenkool
2007-02-14 20:08 ` Yoder Stuart-B08248
2007-02-14 21:12 ` Segher Boessenkool
2007-02-14 21:35 ` Yoder Stuart-B08248
2007-02-14 21:42 ` Benjamin Herrenschmidt
2007-02-14 21:59 ` Scott Wood
2007-02-15 0:20 ` Segher Boessenkool
2007-02-14 22:50 ` Yoder Stuart-B08248
2007-02-14 22:57 ` Benjamin Herrenschmidt
2007-02-15 0:17 ` Segher Boessenkool
2007-02-15 2:12 ` Paul Mackerras
2007-02-15 2:43 ` Segher Boessenkool [this message]
2007-02-15 3:15 ` Paul Mackerras
2007-02-15 14:40 ` Segher Boessenkool
2007-02-16 1:17 ` Paul Mackerras
2007-02-16 9:41 ` Segher Boessenkool
2007-02-15 0:10 ` Segher Boessenkool
2007-02-14 23:32 ` David Gibson
2007-02-14 23:27 ` David Gibson
2007-02-14 23:22 ` David Gibson
2007-02-14 23:51 ` Benjamin Herrenschmidt
2007-02-15 0:36 ` Segher Boessenkool
2007-02-15 0:31 ` Segher Boessenkool
2007-02-15 1:53 ` David Gibson
2007-02-15 3:09 ` Segher Boessenkool
2007-02-15 3:33 ` David Gibson
2007-02-15 14:47 ` Segher Boessenkool
2007-02-15 10:52 ` Benjamin Herrenschmidt
2007-02-15 14:52 ` Segher Boessenkool
2007-02-15 20:43 ` Benjamin Herrenschmidt
2007-02-16 9:23 ` Segher Boessenkool
2007-02-15 16:37 ` Yoder Stuart-B08248
2007-02-15 21:41 ` Benjamin Herrenschmidt
2007-02-16 9:25 ` Segher Boessenkool
2007-02-16 15:32 ` Hartmut Penner
2007-02-16 16:47 ` Yoder Stuart-B08248
2007-02-19 12:02 ` Hartmut Penner
2007-02-14 21:29 ` Benjamin Herrenschmidt
2007-02-13 14:37 ` [0/16] Preliminary Ebony (440GP) support for arch/powerpc Josh Boyer
2007-02-13 20:21 ` Josh Boyer
2007-02-13 15:46 ` Josh Boyer
2007-02-14 16:06 ` Josh Boyer
2007-02-14 23:12 ` David Gibson
2007-02-16 2:19 ` Josh Boyer
2007-02-16 2:53 ` David Gibson
2007-02-16 4:33 ` Josh Boyer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6c90a73251f09d619498c77264a15fef@kernel.crashing.org \
--to=segher@kernel$(echo .)crashing.org \
--cc=david@gibson$(echo .)dropbear.id.au \
--cc=linuxppc-dev@ozlabs$(echo .)org \
--cc=paulus@samba$(echo .)org \
--cc=stuart.yoder@freescale$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox