From: swarren@wwwdotorg.org (Stephen Warren)
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: Fri, 25 Oct 2013 10:00:10 +0100 [thread overview]
Message-ID: <526A331A.3060200@wwwdotorg.org> (raw)
In-Reply-To: <1382616801.6040.26.camel@sakura.staff.proxad.net>
On 10/24/2013 01:13 PM, Maxime Bizon wrote:
>
> On Thu, 2013-10-24 at 12:47 +0100, David Woodhouse wrote:
>
>> If you can automatically infer the correct clock/interrupt/etc in order
>> to do DMA correctly, despite the fact that it wasn't explicitly spelled
>> out in the old DT, then the property is *not* a "required" property.
>> It's optional, and you have a default behaviour for when it's not
>> present.
>
> so inside the new version of driver-hwcrypto.c:
>
> if (irq_of_parse_and_map(...) == NO_IRQ) {
> switch (get_soc_model()) {
> case SOC1:
> irq = 51;
> break;
>
> case SOC2:
> irq = 62;
> break;
>
> [...]
> }
> }
Uggh. Then you start embedding all the per-SoC or per-board description
in the drivers. It doesn't seem scalable for every driver to know about
every HW configuration. Adding extra IRQ/DMA/... properties to DT to
enable new features should be fine.
WARNING: multiple messages have this Message-ID (diff)
From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
To: mbizon-MmRyKUhfbQ9GWvitb5QawA@public.gmane.org,
David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Grant Likely
<grant.likely-s3s/WqlpOiPyB63q8FvJNQ@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>,
Nicolas Pitre <nico-vtqb6HGKxmzR7s880joybQ@public.gmane.org>,
Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Matt Porter <matt.porter-QSEj5FYQhm4dnm+yROfE0A@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: Fri, 25 Oct 2013 10:00:10 +0100 [thread overview]
Message-ID: <526A331A.3060200@wwwdotorg.org> (raw)
In-Reply-To: <1382616801.6040.26.camel-MdnFuL0m/hCw+z8RR+d9WEZ2mhrpEnA6@public.gmane.org>
On 10/24/2013 01:13 PM, Maxime Bizon wrote:
>
> On Thu, 2013-10-24 at 12:47 +0100, David Woodhouse wrote:
>
>> If you can automatically infer the correct clock/interrupt/etc in order
>> to do DMA correctly, despite the fact that it wasn't explicitly spelled
>> out in the old DT, then the property is *not* a "required" property.
>> It's optional, and you have a default behaviour for when it's not
>> present.
>
> so inside the new version of driver-hwcrypto.c:
>
> if (irq_of_parse_and_map(...) == NO_IRQ) {
> switch (get_soc_model()) {
> case SOC1:
> irq = 51;
> break;
>
> case SOC2:
> irq = 62;
> break;
>
> [...]
> }
> }
Uggh. Then you start embedding all the per-SoC or per-board description
in the drivers. It doesn't seem scalable for every driver to know about
every HW configuration. Adding extra IRQ/DMA/... properties to DT to
enable new features should be fine.
--
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next prev parent reply other threads:[~2013-10-25 9:00 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 [this message]
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
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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