From: Pantelis Antoniou <panto@antoniou-consulting.com>
To: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: Guenter Roeck <linux@roeck-us.net>,
Grant Likely <grant.likely@secretlab.ca>,
Rob Herring <robherring2@gmail.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Matt Porter <matt.porter@linaro.org>,
Koen Kooi <koen@dominion.thruhere.net>,
Alison Chaiken <Alison_Chaiken@mentor.com>,
Dinh Nguyen <dinh.linux@gmail.com>, Jan Lubbe <jluebbe@lasnet.de>,
Alexander Sverdlin <alexander.sverdlin@nsn.com>,
Michael Stickel <ms@mycable.de>,
Dirk Behme <dirk.behme@gmail.com>,
Alan Tull <delicious.quinoa@gmail.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Michael Bohan <mbohan@codeaurora.org>,
Ionut Nicu <ioan.nicu.ext@nsn.com>,
Michal Simek <monstr@monstr.eu>,
Matt Ranostay <mranostay@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3 - V2] Introducing Device Tree Overlays
Date: Thu, 7 Nov 2013 22:06:31 +0200 [thread overview]
Message-ID: <4F47D5F8-F3C7-45CA-9D88-2D814BDC1BC7@antoniou-consulting.com> (raw)
In-Reply-To: <20131107192558.GA11453@breakpoint.cc>
Hi Sebastian,
On Nov 7, 2013, at 9:25 PM, Sebastian Andrzej Siewior wrote:
> On 06.11.13, Guenter Roeck wrote:
> |…
> thanks for the explanation.
>
>> We use DT overlays to describe the hardware on those boards and, if necessary,
>> its configuration. For example, if there is a PCIe switch, the overlay would
>> describe its memory and bus number configuration.
>
> So have your "fix" configuration and a few overlays you switch at
> runtime. The problem you have is that you want to switch a specific part
> if your configuration at runtime. I assume you run DT on ARM. What
> happens if you swtich from ARM to x86 and you "keep" your FPGA
> configuration requirement? You can't use both, DT and ACPI, right? So
> what happens then?
>
FWIW DT has been ported to x86. And is present on arm/powerpc/mips/arc and possibly
others.
So what are we talking about again? If you care about the non-DT case, why
don't you make a patch about how you could support Guenter's use case on
the x86.
His use case is not uncommon, believe it or not, and x86 would benefit from
something this flexible.
>>
>> Guenter
>
> Sebastian
Regards
-- Pantelis
next prev parent reply other threads:[~2013-11-07 20:06 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-05 18:41 [PATCH 0/3 - V2] Introducing Device Tree Overlays Pantelis Antoniou
2013-11-05 18:41 ` [PATCH 1/3] OF: Introduce Device Tree resolve support Pantelis Antoniou
2013-11-06 15:59 ` Alexander Sverdlin
2013-11-06 16:24 ` Ionut Nicu
2013-11-05 18:41 ` [PATCH 2/3] OF: Introduce DT overlay support Pantelis Antoniou
2013-11-06 16:00 ` Alexander Sverdlin
2013-11-06 16:26 ` Ionut Nicu
2013-11-06 20:41 ` Dinh Nguyen
2013-11-07 7:10 ` Pantelis Antoniou
2013-11-05 18:41 ` [PATCH 3/3] DT: proc: Add runtime overlay interface in /proc Pantelis Antoniou
2013-11-06 9:51 ` Ionut Nicu
2013-11-06 9:57 ` Pantelis Antoniou
2013-11-06 19:10 ` Rob Herring
2013-11-06 19:24 ` Pantelis Antoniou
2013-11-06 20:16 ` Matt Porter
2013-11-07 7:44 ` Pantelis Antoniou
2013-11-07 23:38 ` delicious quinoa
2013-11-08 7:12 ` Pantelis Antoniou
2013-11-05 19:06 ` [PATCH 0/3 - V2] Introducing Device Tree Overlays Guenter Roeck
2013-11-06 0:15 ` Dinh Nguyen
2013-11-06 8:53 ` Alexander Sverdlin
2013-11-06 19:01 ` Sebastian Andrzej Siewior
2013-11-06 19:08 ` Pantelis Antoniou
2013-11-06 20:31 ` Sebastian Andrzej Siewior
2013-11-06 20:41 ` Sebastian Andrzej Siewior
2013-11-07 7:24 ` Pantelis Antoniou
2013-11-07 7:23 ` Pantelis Antoniou
2013-11-07 9:45 ` Alexander Sverdlin
2013-11-06 19:30 ` Guenter Roeck
2013-11-06 20:38 ` Sebastian Andrzej Siewior
2013-11-06 21:17 ` Guenter Roeck
2013-11-07 7:27 ` Pantelis Antoniou
2013-11-07 19:25 ` Sebastian Andrzej Siewior
2013-11-07 20:06 ` Pantelis Antoniou [this message]
2013-11-07 20:46 ` Sebastian Andrzej Siewior
2013-11-07 23:00 ` Guenter Roeck
2013-11-08 7:12 ` Pantelis Antoniou
2013-11-08 8:40 ` Sebastian Andrzej Siewior
2013-11-08 7:09 ` Pantelis Antoniou
2013-11-11 17:04 ` Grant Likely
2013-11-12 8:16 ` Pantelis Antoniou
2013-11-07 22:51 ` Guenter Roeck
2013-11-07 22:22 ` Guenter Roeck
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