From: james.hogan@imgtec.com (James Hogan)
To: linux-arm-kernel@lists.infradead.org
Subject: [Ksummit-2013-discuss] ARM topic: Is DT on ARM the solution, or is there something better?
Date: Tue, 22 Oct 2013 11:27:32 +0100 [thread overview]
Message-ID: <52665314.2040904@imgtec.com> (raw)
In-Reply-To: <5265AFED.1040503@roeck-us.net>
On 21/10/13 23:51, Guenter Roeck wrote:
> In my opinion, not being able to describe behavior (or what people refer
> to as "describe how the hardware is used") is a severe limitation of
> devicetree usage in Linux. That is not a devicetree limitation per se,
> though, it is simply a matter of choice (or, in some cases, the ability
> of those arguing for new bindings to sell those bindings as "hardware
> description").
I agree this is a real problem, and I think it hinders upstream
submission, since platform data was permitted to describe behaviour as
well as describe the hardware, and platform data is being replaced with
DT which is only permitted to describe the hardware. How then should we
specify the behaviour to the kernel?
I've already mentioned specific examples of this on the "Clock DT
bindings" thread, and would be very interested if anybody has thoughts
about it:
http://lkml.kernel.org/r/520E1DF5.4030409 at imgtec.com
Cheers
James
WARNING: multiple messages have this Message-ID (diff)
From: James Hogan <james.hogan-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
To: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
Cc: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"ksummit-2013-discuss-cunTk1MwBs98uUxBSJOaYoYkZiVZrdSR2LY78lusg7I@public.gmane.org"
<ksummit-2013-discuss-cunTk1MwBs98uUxBSJOaYoYkZiVZrdSR2LY78lusg7I@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [Ksummit-2013-discuss] ARM topic: Is DT on ARM the solution, or is there something better?
Date: Tue, 22 Oct 2013 11:27:32 +0100 [thread overview]
Message-ID: <52665314.2040904@imgtec.com> (raw)
In-Reply-To: <5265AFED.1040503-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
On 21/10/13 23:51, Guenter Roeck wrote:
> In my opinion, not being able to describe behavior (or what people refer
> to as "describe how the hardware is used") is a severe limitation of
> devicetree usage in Linux. That is not a devicetree limitation per se,
> though, it is simply a matter of choice (or, in some cases, the ability
> of those arguing for new bindings to sell those bindings as "hardware
> description").
I agree this is a real problem, and I think it hinders upstream
submission, since platform data was permitted to describe behaviour as
well as describe the hardware, and platform data is being replaced with
DT which is only permitted to describe the hardware. How then should we
specify the behaviour to the kernel?
I've already mentioned specific examples of this on the "Clock DT
bindings" thread, and would be very interested if anybody has thoughts
about it:
http://lkml.kernel.org/r/520E1DF5.4030409-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org
Cheers
James
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next prev parent reply other threads:[~2013-10-22 10:27 UTC|newest]
Thread overview: 342+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-20 21:26 ARM topic: Is DT on ARM the solution, or is there something better? Stephen Warren
2013-10-20 21:26 ` Stephen Warren
2013-10-20 22:08 ` [Ksummit-2013-discuss] " Mark Brown
2013-10-20 22:08 ` Mark Brown
2013-10-20 22:21 ` Stephen Warren
2013-10-20 22:21 ` Stephen Warren
2013-10-21 1:00 ` Nicolas Pitre
2013-10-21 1:00 ` Nicolas Pitre
2013-10-21 9:15 ` Thierry Reding
2013-10-21 9:15 ` Thierry Reding
2013-10-21 14:57 ` Maxime Bizon
2013-10-21 14:57 ` Maxime Bizon
2013-10-21 17:07 ` Richard Cochran
2013-10-21 17:07 ` Richard Cochran
2013-10-21 20:24 ` Stephen Warren
2013-10-21 20:24 ` Stephen Warren
2013-10-22 9:24 ` Thierry Reding
2013-10-22 9:24 ` Thierry Reding
2013-10-23 17:30 ` Richard Cochran
2013-10-23 17:30 ` Richard Cochran
2013-10-23 19:06 ` Thierry Reding
2013-10-23 19:06 ` Thierry Reding
2013-10-22 17:22 ` Jason Gunthorpe
2013-10-22 17:22 ` Jason Gunthorpe
2013-10-21 20:29 ` Stephen Warren
2013-10-21 20:29 ` Stephen Warren
2013-10-21 20:40 ` Nicolas Pitre
2013-10-21 20:40 ` Nicolas Pitre
2013-10-22 9:39 ` Thierry Reding
2013-10-22 9:39 ` Thierry Reding
2013-10-22 15:04 ` Matt Porter
2013-10-22 15:04 ` Matt Porter
2013-10-22 17:13 ` Jason Gunthorpe
2013-10-22 17:13 ` Jason Gunthorpe
2013-10-22 17:49 ` Guenter Roeck
2013-10-22 17:49 ` Guenter Roeck
2013-10-23 8:06 ` Richard Cochran
2013-10-23 8:06 ` Richard Cochran
2013-10-23 9:49 ` Thierry Reding
2013-10-23 9:49 ` Thierry Reding
2013-10-23 17:16 ` Richard Cochran
2013-10-23 17:16 ` Richard Cochran
2013-10-23 17:25 ` Matt Porter
2013-10-23 17:25 ` Matt Porter
2013-10-23 18:05 ` Richard Cochran
2013-10-23 18:05 ` Richard Cochran
2013-10-23 18:57 ` Nicolas Pitre
2013-10-23 18:57 ` Nicolas Pitre
2013-10-23 20:12 ` Matt Porter
2013-10-23 20:12 ` Matt Porter
2013-10-23 17:55 ` Nicolas Pitre
2013-10-23 17:55 ` Nicolas Pitre
2013-10-23 18:13 ` Richard Cochran
2013-10-23 18:13 ` Richard Cochran
2013-10-23 20:35 ` Thierry Reding
2013-10-23 20:35 ` Thierry Reding
2013-10-23 17:29 ` Jason Gunthorpe
2013-10-23 17:29 ` Jason Gunthorpe
2013-10-23 17:45 ` Richard Cochran
2013-10-23 17:45 ` Richard Cochran
2013-10-23 18:46 ` Maxime Bizon
2013-10-23 18:46 ` Maxime Bizon
2013-10-23 18:51 ` Richard Cochran
2013-10-23 18:51 ` Richard Cochran
2013-10-23 19:12 ` Maxime Bizon
2013-10-23 19:12 ` Maxime Bizon
2013-10-24 9:52 ` Grant Likely
2013-10-24 9:52 ` Grant Likely
2013-10-24 11:33 ` Maxime Bizon
2013-10-24 11:33 ` Maxime Bizon
2013-10-24 11:47 ` David Woodhouse
2013-10-24 11:47 ` David Woodhouse
2013-10-24 12:13 ` Maxime Bizon
2013-10-24 12:13 ` Maxime Bizon
2013-10-24 12:22 ` David Woodhouse
2013-10-24 12:22 ` David Woodhouse
2013-10-24 12:22 ` David Woodhouse
2013-10-24 12:22 ` David Woodhouse
2013-10-24 13:05 ` Maxime Bizon
2013-10-24 13:05 ` Maxime Bizon
2013-10-24 13:14 ` David Woodhouse
2013-10-24 13:14 ` David Woodhouse
2013-10-24 13:46 ` Maxime Bizon
2013-10-24 13:46 ` Maxime Bizon
2013-10-24 19:52 ` Matt Porter
2013-10-24 19:52 ` Matt Porter
2013-10-24 20:11 ` Matt Sealey
2013-10-24 20:11 ` Matt Sealey
2013-10-25 9:00 ` Stephen Warren
2013-10-25 9:00 ` Stephen Warren
2013-10-24 12:23 ` Thierry Reding
2013-10-24 12:23 ` Thierry Reding
2013-10-24 12:29 ` David Woodhouse
2013-10-24 12:29 ` David Woodhouse
2013-10-24 13:00 ` Maxime Bizon
2013-10-24 13:00 ` Maxime Bizon
2013-10-24 13:10 ` David Woodhouse
2013-10-24 13:10 ` David Woodhouse
2013-10-24 13:30 ` Maxime Bizon
2013-10-24 13:30 ` Maxime Bizon
2013-10-24 14:05 ` David Woodhouse
2013-10-24 14:05 ` David Woodhouse
2013-10-24 14:19 ` Thierry Reding
2013-10-24 14:19 ` Thierry Reding
2013-10-24 14:30 ` David Woodhouse
2013-10-24 14:30 ` David Woodhouse
2013-10-24 14:38 ` Thierry Reding
2013-10-24 14:38 ` Thierry Reding
2013-10-24 16:39 ` Nicolas Pitre
2013-10-24 16:39 ` Nicolas Pitre
2013-10-24 16:45 ` David Woodhouse
2013-10-24 16:45 ` David Woodhouse
2013-10-24 17:08 ` Nicolas Pitre
2013-10-24 17:08 ` Nicolas Pitre
2013-10-24 18:15 ` jonsmirl at gmail.com
2013-10-24 18:15 ` jonsmirl-Re5JQEeQqe8AvxtiuMwx3w
2013-10-24 14:32 ` Richard Cochran
2013-10-24 14:32 ` Richard Cochran
2013-10-24 14:47 ` Thierry Reding
2013-10-24 14:47 ` Thierry Reding
2013-10-24 15:37 ` Nicolas Pitre
2013-10-24 15:37 ` Nicolas Pitre
2013-10-24 14:33 ` Maxime Bizon
2013-10-24 14:33 ` Maxime Bizon
2013-10-24 14:57 ` Thierry Reding
2013-10-24 14:57 ` Thierry Reding
2013-10-24 16:27 ` Nicolas Pitre
2013-10-24 16:27 ` Nicolas Pitre
2013-10-24 14:12 ` Thierry Reding
2013-10-24 14:12 ` Thierry Reding
2013-10-24 14:22 ` David Woodhouse
2013-10-24 14:22 ` David Woodhouse
2013-10-24 14:23 ` Thierry Reding
2013-10-24 14:23 ` Thierry Reding
2013-10-24 14:38 ` David Woodhouse
2013-10-24 14:38 ` David Woodhouse
2013-10-24 14:58 ` Thierry Reding
2013-10-24 14:58 ` Thierry Reding
2013-10-24 19:58 ` Matt Porter
2013-10-24 19:58 ` Matt Porter
2013-10-24 23:54 ` Grant Likely
2013-10-24 23:54 ` Grant Likely
2013-10-25 8:52 ` Stephen Warren
2013-10-25 8:52 ` Stephen Warren
2013-10-25 9:16 ` Thierry Reding
2013-10-25 9:16 ` Thierry Reding
2013-10-23 17:47 ` Richard Cochran
2013-10-23 17:47 ` Richard Cochran
2013-10-23 17:58 ` Nicolas Pitre
2013-10-23 17:58 ` Nicolas Pitre
2013-10-23 18:02 ` Jason Gunthorpe
2013-10-23 18:02 ` Jason Gunthorpe
2013-10-23 18:23 ` Richard Cochran
2013-10-23 18:23 ` Richard Cochran
2013-10-24 8:34 ` Thierry Reding
2013-10-24 8:34 ` Thierry Reding
2013-10-24 15:00 ` Richard Cochran
2013-10-24 15:00 ` Richard Cochran
2013-10-24 19:46 ` Matt Porter
2013-10-24 19:46 ` Matt Porter
2013-10-23 18:01 ` Guenter Roeck
2013-10-23 18:01 ` Guenter Roeck
2013-10-23 18:25 ` Jason Gunthorpe
2013-10-23 18:25 ` Jason Gunthorpe
2013-10-23 18:30 ` Richard Cochran
2013-10-23 18:30 ` Richard Cochran
2013-10-23 18:54 ` Jason Gunthorpe
2013-10-23 18:54 ` Jason Gunthorpe
2013-10-24 8:06 ` Sascha Hauer
2013-10-24 8:06 ` Sascha Hauer
2013-10-24 8:17 ` Thierry Reding
2013-10-24 8:17 ` Thierry Reding
2013-10-24 8:52 ` Sascha Hauer
2013-10-24 8:52 ` Sascha Hauer
2013-10-23 23:29 ` Ben Hutchings
2013-10-23 23:29 ` Ben Hutchings
2013-10-24 7:32 ` Richard Cochran
2013-10-24 7:32 ` Richard Cochran
2013-10-24 9:35 ` Ben Hutchings
2013-10-24 9:35 ` Ben Hutchings
2013-10-24 12:02 ` Andre Heider
2013-10-24 12:02 ` Andre Heider
2013-10-24 8:01 ` Sascha Hauer
2013-10-24 8:01 ` Sascha Hauer
2013-10-24 8:11 ` Thierry Reding
2013-10-24 8:11 ` Thierry Reding
2013-10-22 17:42 ` Nicolas Pitre
2013-10-22 17:42 ` Nicolas Pitre
2013-10-22 18:21 ` Peter Maydell
2013-10-22 18:21 ` Peter Maydell
2013-10-22 18:36 ` Nicolas Pitre
2013-10-22 18:36 ` Nicolas Pitre
2013-10-22 19:16 ` Guenter Roeck
2013-10-22 19:16 ` Guenter Roeck
2013-10-22 20:12 ` Thierry Reding
2013-10-22 20:12 ` Thierry Reding
2013-10-22 20:41 ` Nicolas Pitre
2013-10-22 20:41 ` Nicolas Pitre
2013-10-22 21:39 ` Jason Gunthorpe
2013-10-22 21:39 ` Jason Gunthorpe
2013-10-23 8:50 ` Thierry Reding
2013-10-23 8:50 ` Thierry Reding
2013-10-23 9:02 ` Thierry Reding
2013-10-23 9:02 ` Thierry Reding
2013-10-22 20:42 ` Matt Porter
2013-10-22 20:42 ` Matt Porter
2013-10-23 10:04 ` Thierry Reding
2013-10-23 10:04 ` Thierry Reding
2013-10-23 11:48 ` Peter Maydell
2013-10-23 11:48 ` Peter Maydell
2013-10-23 16:29 ` Matt Porter
2013-10-23 16:29 ` Matt Porter
2013-10-22 6:47 ` David Brown
2013-10-22 6:47 ` David Brown
2013-10-20 23:11 ` Russell King - ARM Linux
2013-10-20 23:11 ` Russell King - ARM Linux
2013-10-20 23:44 ` [Ksummit-2013-discuss] " Guenter Roeck
2013-10-20 23:44 ` Guenter Roeck
2013-10-20 23:51 ` Russell King - ARM Linux
2013-10-20 23:51 ` Russell King - ARM Linux
2013-10-21 0:13 ` Guenter Roeck
2013-10-21 0:13 ` Guenter Roeck
2013-10-21 20:05 ` Stephen Warren
2013-10-21 20:05 ` Stephen Warren
2013-10-22 9:45 ` Thierry Reding
2013-10-22 9:45 ` Thierry Reding
2013-10-21 8:32 ` Sascha Hauer
2013-10-21 8:32 ` Sascha Hauer
2013-10-21 8:48 ` Russell King - ARM Linux
2013-10-21 8:48 ` Russell King - ARM Linux
2013-10-21 9:27 ` Sascha Hauer
2013-10-21 9:27 ` Sascha Hauer
[not found] ` < CAF6AEGtt_2sStiZCNBp9btxevWghSwLZZBdN6ir8eUpX1FXrCQ@mail.gmail.com>
[not found] ` < 20131024072811.GS30088@pengutronix.de>
[not found] ` < CAF6AEGuEho9Ms7ifTE-EmBoQ-=_AXgvGcJxi5qEC0vsZ+H9C+A@mail.gmail.com>
2013-10-21 9:57 ` Russell King - ARM Linux
2013-10-21 9:57 ` Russell King - ARM Linux
2013-10-21 10:24 ` Thierry Reding
2013-10-21 10:24 ` Thierry Reding
2013-10-21 10:30 ` Russell King - ARM Linux
2013-10-21 10:30 ` Russell King - ARM Linux
2013-10-21 10:41 ` Thierry Reding
2013-10-21 10:41 ` Thierry Reding
2013-10-22 9:19 ` [Ksummit-2013-discuss] " Mark Brown
2013-10-22 9:19 ` Mark Brown
2013-10-21 20:09 ` Stephen Warren
2013-10-21 20:09 ` Stephen Warren
2013-10-21 23:18 ` Sascha Hauer
2013-10-21 23:18 ` Sascha Hauer
2013-10-24 1:14 ` Rob Clark
2013-10-24 1:14 ` Rob Clark
2013-10-24 7:28 ` Sascha Hauer
2013-10-24 7:28 ` Sascha Hauer
2013-10-24 9:00 ` Thierry Reding
2013-10-24 9:00 ` Thierry Reding
2013-10-24 9:21 ` Sascha Hauer
2013-10-24 9:21 ` Sascha Hauer
2013-10-24 21:21 ` Rob Clark
2013-10-24 21:21 ` Rob Clark
2013-10-25 9:24 ` Thierry Reding
2013-10-25 9:24 ` Thierry Reding
2013-11-18 12:45 ` Russell King - ARM Linux
2013-11-18 12:45 ` Russell King - ARM Linux
2013-11-18 15:37 ` Thierry Reding
2013-11-18 15:37 ` Thierry Reding
2013-11-18 16:11 ` Russell King - ARM Linux
2013-11-18 16:11 ` Russell King - ARM Linux
2013-11-18 16:18 ` Thierry Reding
2013-11-18 16:18 ` Thierry Reding
2013-11-18 18:43 ` Mark Brown
2013-11-18 18:43 ` Mark Brown
2013-11-19 13:54 ` Grant Likely
2013-11-19 13:54 ` Grant Likely
2013-10-21 10:04 ` Thierry Reding
2013-10-21 10:04 ` Thierry Reding
2013-10-21 10:57 ` [Ksummit-2013-discuss] " Laurent Pinchart
2013-10-21 10:57 ` Laurent Pinchart
2013-10-21 10:00 ` Laurent Pinchart
2013-10-21 10:00 ` Laurent Pinchart
2013-10-21 11:18 ` Sebastian Hesselbarth
2013-10-21 11:18 ` Sebastian Hesselbarth
2013-10-21 8:54 ` Thierry Reding
2013-10-21 8:54 ` Thierry Reding
2013-10-21 20:19 ` Stephen Warren
2013-10-21 20:19 ` Stephen Warren
2013-10-21 22:51 ` [Ksummit-2013-discuss] " Guenter Roeck
2013-10-21 22:51 ` Guenter Roeck
2013-10-22 10:27 ` James Hogan [this message]
2013-10-22 10:27 ` James Hogan
2013-10-22 16:31 ` Jonathan Cameron
2013-10-22 16:31 ` Jonathan Cameron
2013-10-22 16:49 ` Guenter Roeck
2013-10-22 16:49 ` Guenter Roeck
2013-10-22 20:35 ` Thierry Reding
2013-10-22 20:35 ` Thierry Reding
2013-10-22 21:10 ` Guenter Roeck
2013-10-22 21:10 ` Guenter Roeck
2013-10-23 7:57 ` Thierry Reding
2013-10-23 7:57 ` Thierry Reding
2013-10-23 16:01 ` Guenter Roeck
2013-10-23 16:01 ` Guenter Roeck
2013-10-23 21:07 ` Thierry Reding
2013-10-23 21:07 ` Thierry Reding
2013-10-24 15:18 ` Guenter Roeck
2013-10-24 15:18 ` Guenter Roeck
2013-11-01 10:36 ` Thierry Reding
2013-11-01 10:36 ` Thierry Reding
2013-11-01 13:30 ` Guenter Roeck
2013-11-01 13:30 ` Guenter Roeck
2013-10-22 20:48 ` Thierry Reding
2013-10-22 20:48 ` Thierry Reding
2013-10-22 10:25 ` Thierry Reding
2013-10-22 10:25 ` Thierry Reding
2013-10-22 21:44 ` Matt Sealey
2013-10-22 21:44 ` Matt Sealey
2013-10-23 11:41 ` Peter Maydell
2013-10-23 11:41 ` Peter Maydell
2013-10-23 23:02 ` [Ksummit-2013-discuss] " Rob Herring
2013-10-23 23:02 ` Rob Herring
2013-11-18 12:26 ` Thierry Reding
2013-11-18 12:26 ` Thierry Reding
2013-11-18 13:40 ` Grant Likely
2013-11-18 13:40 ` Grant Likely
2013-11-18 13:57 ` Mark Brown
2013-11-18 13:57 ` Mark Brown
2013-11-18 15:29 ` Thierry Reding
2013-11-18 15:29 ` Thierry Reding
2013-11-18 15:50 ` Mark Brown
2013-11-18 15:50 ` Mark Brown
2013-11-18 16:06 ` Thierry Reding
2013-11-18 16:06 ` Thierry Reding
2013-11-18 17:16 ` Stephen Warren
2013-11-18 17:16 ` Stephen Warren
2013-11-19 9:35 ` Thierry Reding
2013-11-19 9:35 ` Thierry Reding
2013-11-19 17:27 ` Stephen Warren
2013-11-19 17:27 ` Stephen Warren
2013-11-20 13:29 ` Thierry Reding
2013-11-20 13:29 ` Thierry Reding
2013-11-18 18:35 ` Mark Brown
2013-11-18 18:35 ` Mark Brown
2013-11-19 9:11 ` Thierry Reding
2013-11-19 9:11 ` Thierry Reding
2013-11-19 10:16 ` Mark Brown
2013-11-19 10:16 ` Mark Brown
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