From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
To: Pantelis Antoniou <panto@antoniou-consulting.com>
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 21:46:26 +0100 [thread overview]
Message-ID: <20131107204626.GA11746@breakpoint.cc> (raw)
In-Reply-To: <4F47D5F8-F3C7-45CA-9D88-2D814BDC1BC7@antoniou-consulting.com>
On 07.11.13, Pantelis Antoniou wrote:
> Hi Sebastian,
Hi Pantelis,
> FWIW DT has been ported to x86. And is present on arm/powerpc/mips/arc and possibly
> others.
Yes, I know. I am the one that did the work for CE4100, the first one
that boots with DT on x86.
> 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.
I am only saying that this "hot-plug a device at a non hot-plugagle bus at
runtime" is not limited to DT but this solution is. X86 + ACPI is not
the only limitation. ARM is (forced) going to ACPI as well as far I
know. And this solution is limited to DT. This is what I am pointing
out.
> His use case is not uncommon, believe it or not, and x86 would benefit from
> something this flexible.
I *think* a more flexible solution would be something like bus_type which is
exposed via configfs. It would be attached behind a certain device/bus where
the "physical" hotplug interface is. The user would then be able to read the
configuration based on whatever information he has and could then create
devices he likes at runtime. This wouldn't depend much on the firmware that is
used but would require a little more work I think.
> Regards
>
> -- Pantelis
Sebastian
next prev parent reply other threads:[~2013-11-07 20:46 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
2013-11-07 20:46 ` Sebastian Andrzej Siewior [this message]
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
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=20131107204626.GA11746@breakpoint.cc \
--to=sebastian@breakpoint.cc \
--cc=Alison_Chaiken@mentor.com \
--cc=alexander.sverdlin@nsn.com \
--cc=delicious.quinoa@gmail.com \
--cc=devicetree@vger.kernel.org \
--cc=dinh.linux@gmail.com \
--cc=dirk.behme@gmail.com \
--cc=grant.likely@secretlab.ca \
--cc=ioan.nicu.ext@nsn.com \
--cc=jluebbe@lasnet.de \
--cc=koen@dominion.thruhere.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=matt.porter@linaro.org \
--cc=mbohan@codeaurora.org \
--cc=monstr@monstr.eu \
--cc=mranostay@gmail.com \
--cc=ms@mycable.de \
--cc=panto@antoniou-consulting.com \
--cc=robherring2@gmail.com \
--cc=s.hauer@pengutronix.de \
--cc=swarren@wwwdotorg.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
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;
as well as URLs for NNTP newsgroup(s).