From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>,
Hans Verkuil <hverkuil@xs4all.nl>,
Sylwester Nawrocki <s.nawrocki@samsung.com>,
linux-media@vger.kernel.org, devicetree-discuss@lists.ozlabs.org,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Magnus Damm <magnus.damm@gmail.com>,
linux-sh@vger.kernel.org, Stephen Warren <swarren@wwwdotorg.org>,
Arnd Bergmann <arnd@arndb.de>,
Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH 05/14] media: add a V4L2 OF parser
Date: Fri, 05 Oct 2012 18:45:14 +0000 [thread overview]
Message-ID: <20121005184514.GF4360@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <506F2763.6050808@gmail.com>
On Fri, Oct 05, 2012 at 08:30:59PM +0200, Sylwester Nawrocki wrote:
> The deferred probing was introduced in Linux to resolve resource
> inter-dependencies in case of FDT based booting AFAIK.
It's completely unrelated to FDT, it's a general issue. There's no sane
way to use hacks like link ordering to resolve boot time dependencies -
start getting things like regulators connected to I2C or SPI controllers
which may also use GPIOs for some signals and may be parents for other
regulators and mapping out the dependency graph becomes unreasonably
complicated. Deferred probing is designed to solve this problem by
working things out dynamically at runtime.
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>,
Hans Verkuil <hverkuil@xs4all.nl>,
Sylwester Nawrocki <s.nawrocki@samsung.com>,
linux-media@vger.kernel.org, devicetree-discuss@lists.ozlabs.org,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Magnus Damm <magnus.damm@gmail.com>,
linux-sh@vger.kernel.org, Stephen Warren <swarren@wwwdotorg.org>,
Arnd Bergmann <arnd@arndb.de>,
Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH 05/14] media: add a V4L2 OF parser
Date: Fri, 5 Oct 2012 19:45:14 +0100 [thread overview]
Message-ID: <20121005184514.GF4360@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <506F2763.6050808@gmail.com>
On Fri, Oct 05, 2012 at 08:30:59PM +0200, Sylwester Nawrocki wrote:
> The deferred probing was introduced in Linux to resolve resource
> inter-dependencies in case of FDT based booting AFAIK.
It's completely unrelated to FDT, it's a general issue. There's no sane
way to use hacks like link ordering to resolve boot time dependencies -
start getting things like regulators connected to I2C or SPI controllers
which may also use GPIOs for some signals and may be parents for other
regulators and mapping out the dependency graph becomes unreasonably
complicated. Deferred probing is designed to solve this problem by
working things out dynamically at runtime.
next prev parent reply other threads:[~2012-10-05 18:45 UTC|newest]
Thread overview: 202+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-27 14:07 [PATCH 00/14] V4L2 DT support Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 01/14] i2c: add dummy inline functions for when CONFIG_OF_I2C(_MODULE) isn't defined Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 02/14] of: add a dummy inline function for when CONFIG_OF is not defined Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-28 11:05 ` [PATCH 15/14] OF: define of_*_cmp() macros also if CONFIG_OF isn't set Guennadi Liakhovetski
2012-09-28 11:05 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 04/14] media: add V4L2 DT binding documentation Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-10-01 20:45 ` Sylwester Nawrocki
2012-10-01 20:45 ` Sylwester Nawrocki
[not found] ` <1348754853-28619-5-git-send-email-g.liakhovetski-Mmb7MZpHnFY@public.gmane.org>
2012-10-02 14:15 ` Rob Herring
2012-10-02 14:15 ` Rob Herring
2012-10-02 14:15 ` Rob Herring
2012-10-02 14:33 ` Guennadi Liakhovetski
2012-10-02 14:33 ` Guennadi Liakhovetski
2012-10-03 20:54 ` Rob Herring
2012-10-03 20:54 ` Rob Herring
2012-10-05 9:43 ` Guennadi Liakhovetski
2012-10-05 9:43 ` Guennadi Liakhovetski
2012-10-05 11:31 ` Hans Verkuil
2012-10-05 11:31 ` Hans Verkuil
2012-10-05 11:37 ` Guennadi Liakhovetski
2012-10-05 11:37 ` Guennadi Liakhovetski
2012-10-08 20:00 ` Stephen Warren
2012-10-08 20:00 ` Stephen Warren
2012-10-08 20:59 ` Laurent Pinchart
2012-10-08 21:00 ` Laurent Pinchart
2012-10-08 21:14 ` Guennadi Liakhovetski
2012-10-08 21:14 ` Guennadi Liakhovetski
2012-10-08 21:14 ` Guennadi Liakhovetski
2012-10-09 9:21 ` Hans Verkuil
2012-10-09 9:21 ` Hans Verkuil
2012-10-09 9:29 ` Guennadi Liakhovetski
2012-10-09 9:29 ` Guennadi Liakhovetski
2012-10-05 15:10 ` Sascha Hauer
2012-10-05 15:10 ` Sascha Hauer
2012-10-05 15:10 ` Sascha Hauer
2012-10-05 15:41 ` Guennadi Liakhovetski
2012-10-05 15:41 ` Guennadi Liakhovetski
2012-10-05 16:02 ` Sascha Hauer
2012-10-05 16:02 ` Sascha Hauer
2012-10-08 7:58 ` Guennadi Liakhovetski
2012-10-08 7:58 ` Guennadi Liakhovetski
2012-10-10 8:40 ` Sascha Hauer
2012-10-10 8:40 ` Sascha Hauer
2012-10-10 8:51 ` Mark Brown
2012-10-10 8:51 ` Mark Brown
2012-10-10 9:21 ` Sascha Hauer
2012-10-10 9:21 ` Sascha Hauer
2012-10-10 10:46 ` Mark Brown
2012-10-10 10:46 ` Mark Brown
2012-10-08 20:12 ` Stephen Warren
2012-10-08 20:12 ` Stephen Warren
2012-09-27 14:07 ` [PATCH 05/14] media: add a V4L2 OF parser Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-10-01 21:37 ` Sylwester Nawrocki
2012-10-01 21:37 ` Sylwester Nawrocki
2012-10-02 9:49 ` Guennadi Liakhovetski
2012-10-02 9:49 ` Guennadi Liakhovetski
[not found] ` <Pine.LNX.4.64.1210021142210.15778-0199iw4Nj15frtckUFj5Ag@public.gmane.org>
2012-10-02 10:13 ` Sylwester Nawrocki
2012-10-02 10:13 ` Sylwester Nawrocki
2012-10-02 10:13 ` Sylwester Nawrocki
2012-10-02 11:04 ` Guennadi Liakhovetski
2012-10-02 11:04 ` Guennadi Liakhovetski
2012-10-05 10:41 ` Hans Verkuil
2012-10-05 10:41 ` Hans Verkuil
2012-10-05 10:58 ` Guennadi Liakhovetski
2012-10-05 10:58 ` Guennadi Liakhovetski
2012-10-05 11:23 ` Hans Verkuil
2012-10-05 11:23 ` Hans Verkuil
2012-10-05 11:35 ` Guennadi Liakhovetski
2012-10-05 11:35 ` Guennadi Liakhovetski
2012-10-08 12:23 ` Guennadi Liakhovetski
2012-10-08 12:23 ` Guennadi Liakhovetski
2012-10-08 13:48 ` Hans Verkuil
2012-10-08 13:48 ` Hans Verkuil
2012-10-08 14:30 ` Guennadi Liakhovetski
2012-10-08 14:30 ` Guennadi Liakhovetski
2012-10-08 14:53 ` Hans Verkuil
2012-10-08 14:53 ` Hans Verkuil
2012-10-08 15:15 ` Guennadi Liakhovetski
2012-10-08 15:15 ` Guennadi Liakhovetski
2012-10-08 15:41 ` Hans Verkuil
2012-10-08 15:41 ` Hans Verkuil
2012-10-08 15:53 ` Guennadi Liakhovetski
2012-10-08 15:53 ` Guennadi Liakhovetski
[not found] ` <Pine.LNX.4.64.1210081748390.14454-0199iw4Nj15frtckUFj5Ag@public.gmane.org>
2012-10-08 16:00 ` Guennadi Liakhovetski
2012-10-08 16:00 ` Guennadi Liakhovetski
2012-10-08 16:00 ` Guennadi Liakhovetski
2012-10-10 13:22 ` Laurent Pinchart
2012-10-10 13:22 ` Laurent Pinchart
2012-10-10 13:18 ` Laurent Pinchart
2012-10-10 13:18 ` Laurent Pinchart
2012-10-10 16:50 ` Stephen Warren
2012-10-10 16:50 ` Stephen Warren
2012-10-10 22:51 ` Laurent Pinchart
2012-10-10 22:51 ` Laurent Pinchart
2012-10-11 16:15 ` Stephen Warren
2012-10-11 16:15 ` Stephen Warren
2012-10-10 13:12 ` Laurent Pinchart
2012-10-10 13:12 ` Laurent Pinchart
2012-10-10 12:54 ` Laurent Pinchart
2012-10-10 12:54 ` Laurent Pinchart
2012-10-10 13:45 ` Mauro Carvalho Chehab
2012-10-10 13:45 ` Mauro Carvalho Chehab
2012-10-10 14:48 ` Laurent Pinchart
2012-10-10 14:48 ` Laurent Pinchart
2012-10-10 14:57 ` Mauro Carvalho Chehab
2012-10-10 14:57 ` Mauro Carvalho Chehab
2012-10-10 15:15 ` Laurent Pinchart
2012-10-10 15:15 ` Laurent Pinchart
2012-10-11 19:48 ` Sakari Ailus
2012-10-11 19:48 ` Sakari Ailus
2012-10-13 0:16 ` Guennadi Liakhovetski
2012-10-13 0:16 ` Guennadi Liakhovetski
2012-10-05 18:30 ` Sylwester Nawrocki
2012-10-05 18:30 ` Sylwester Nawrocki
2012-10-05 18:45 ` Mark Brown [this message]
2012-10-05 18:45 ` Mark Brown
2012-10-08 9:40 ` Guennadi Liakhovetski
2012-10-08 9:40 ` Guennadi Liakhovetski
2012-10-09 10:34 ` Sylwester Nawrocki
2012-10-09 10:34 ` Sylwester Nawrocki
2012-10-09 11:00 ` Hans Verkuil
2012-10-09 11:00 ` Hans Verkuil
2012-10-10 13:25 ` Laurent Pinchart
2012-10-10 13:25 ` Laurent Pinchart
2012-10-10 20:23 ` Sylwester Nawrocki
2012-10-10 20:23 ` Sylwester Nawrocki
2012-10-10 20:32 ` Guennadi Liakhovetski
2012-10-10 20:32 ` Guennadi Liakhovetski
2012-10-10 21:12 ` Sylwester Nawrocki
2012-10-10 21:12 ` Sylwester Nawrocki
2012-10-10 23:05 ` Laurent Pinchart
2012-10-10 23:05 ` Laurent Pinchart
[not found] ` <5075D947.3080903-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-10-10 22:58 ` Laurent Pinchart
2012-10-10 22:58 ` Laurent Pinchart
2012-10-10 22:58 ` Laurent Pinchart
2012-10-08 21:30 ` Laurent Pinchart
2012-10-08 21:30 ` Laurent Pinchart
2012-10-08 10:03 ` Sylwester Nawrocki
2012-10-08 10:03 ` Sylwester Nawrocki
2012-09-27 14:07 ` [PATCH 06/14] media: soc-camera: prepare for asynchronous client probing Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 07/14] media: soc-camera: support deferred probing of clients Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2013-04-10 10:38 ` Barry Song
2013-04-10 10:38 ` Barry Song
[not found] ` <CAGsJ_4yUY6PE0NWZ9yaOLFmRb3O-HL55=w7Y6muwL0YbkJtP0Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-04-10 12:06 ` Guennadi Liakhovetski
2013-04-10 12:06 ` Guennadi Liakhovetski
2013-04-10 12:06 ` Guennadi Liakhovetski
2013-04-10 13:53 ` Barry Song
2013-04-10 13:53 ` Barry Song
2013-04-10 13:56 ` Mark Brown
2013-04-10 13:56 ` Mark Brown
2013-04-10 14:00 ` Barry Song
2013-04-10 14:00 ` Barry Song
2013-04-10 14:03 ` Guennadi Liakhovetski
2013-04-10 14:03 ` Guennadi Liakhovetski
2013-04-10 14:30 ` Barry Song
2013-04-10 14:30 ` Barry Song
2013-04-10 14:43 ` Guennadi Liakhovetski
2013-04-10 14:43 ` Guennadi Liakhovetski
2013-04-10 15:02 ` Barry Song
2013-04-10 15:02 ` Barry Song
2012-09-27 14:07 ` [PATCH 08/14] media: soc-camera: use managed devm_regulator_bulk_get() Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 17:38 ` Sachin Kamat
2012-09-27 17:50 ` Sachin Kamat
2012-09-27 14:07 ` [PATCH 09/14] media: mt9t112: support deferred probing Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
[not found] ` <1348754853-28619-1-git-send-email-g.liakhovetski-Mmb7MZpHnFY@public.gmane.org>
2012-09-27 14:07 ` [PATCH 03/14] OF: make a function pointer argument const Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 10/14] media: soc-camera: support OF cameras Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-10-05 19:11 ` Sylwester Nawrocki
2012-10-05 19:11 ` Sylwester Nawrocki
2012-10-08 8:37 ` Guennadi Liakhovetski
2012-10-08 8:37 ` Guennadi Liakhovetski
2012-10-08 9:28 ` Sylwester Nawrocki
2012-10-08 9:28 ` Sylwester Nawrocki
2013-04-08 9:19 ` Barry Song
2013-04-08 9:19 ` Barry Song
[not found] ` <CAGsJ_4zYvF-U0_ETs9EP8i+bOJiJLkXWrJdMNnW_sXU-QwnXQw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-04-08 11:21 ` Guennadi Liakhovetski
2013-04-08 11:21 ` Guennadi Liakhovetski
2013-04-08 11:21 ` Guennadi Liakhovetski
2013-04-08 11:49 ` Barry Song
2013-04-08 11:49 ` Barry Song
2012-09-27 14:07 ` [PATCH 11/14] media: sh-mobile-ceu-camera: runtime PM suspending doesn't have to be synchronous Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 12/14] media: sh-mobile-ceu-camera: add primitive OF support Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 13/14] media: sh-mobile-ceu-driver: support max width and height in DT Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-09-27 14:07 ` [PATCH 14/14] media: sh_mobile_ceu_camera: support all standard V4L2 DT properties Guennadi Liakhovetski
2012-09-27 14:07 ` Guennadi Liakhovetski
2012-10-05 12:32 ` [PATCH 00/14] V4L2 DT support Sylwester Nawrocki
2012-10-05 12:32 ` Sylwester Nawrocki
2012-10-05 14:41 ` Guennadi Liakhovetski
2012-10-05 14:41 ` Guennadi Liakhovetski
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