From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Alexandre Belloni
<alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Subject: Re: [PATCH] spi: Force the registration of the spidev devices
Date: Wed, 30 Apr 2014 11:06:09 -0700 [thread overview]
Message-ID: <20140430180609.GC3000@lukather> (raw)
In-Reply-To: <20140429183758.GH15125-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
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Hi Mark
On Tue, Apr 29, 2014 at 11:37:58AM -0700, Mark Brown wrote:
> On Mon, Apr 28, 2014 at 10:22:54AM -0700, Maxime Ripard wrote:
>
> > spidev device registration has always been a controversial subject
> > since the move to DT.
>
> Why can we not handle this by using sysfs to bind spidev to the
> device?
I just tried it, and apparently, you can't really use this, since spi
devices are created from the device tree (or ACPI) whenever the master
registers.
As such, you still need a DT node for every spidev device you might
want to use.
It doesn't really work either for a device that would be bound to a
driver, that you unbind, and then try to bind to spidev instead. It
looks like the device is released whenever you unbind it, so you can't
really use it afterwards.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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next prev parent reply other threads:[~2014-04-30 18:06 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-28 17:22 [PATCH] spi: Force the registration of the spidev devices Maxime Ripard
[not found] ` <1398705774-12361-1-git-send-email-maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2014-04-29 18:37 ` Mark Brown
[not found] ` <20140429183758.GH15125-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-04-29 21:31 ` Martin Sperl
[not found] ` <24BF05CB-35FF-42E8-BE5C-A5E4E3D0C52A-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org>
2014-04-30 18:14 ` Maxime Ripard
2014-04-30 20:00 ` Martin Sperl
[not found] ` <DA3907EB-0C1B-42FB-B288-9E33F6E24E3E-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org>
2014-04-30 22:19 ` Maxime Ripard
2014-05-01 1:21 ` Mark Brown
2014-04-30 18:06 ` Maxime Ripard [this message]
2014-05-01 1:18 ` Mark Brown
[not found] ` <20140501011811.GF3245-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-05-01 22:36 ` Maxime Ripard
2014-05-01 23:28 ` Geert Uytterhoeven
[not found] ` <CAMuHMdUWa1_n94sDvv=L_goc+SOnD9CAKi5DzifrY7GWYRdQmw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-02 16:55 ` Mark Brown
2014-05-05 4:17 ` Maxime Ripard
2014-05-05 7:10 ` Geert Uytterhoeven
[not found] ` <CAMuHMdWZ1rvC+tkT=CbfMwZtppyJ_KpzT7JrLd5k5P2oxzA+8g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-05 13:57 ` Alexandre Belloni
[not found] ` <20140505135701.GA21940-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2014-05-05 14:22 ` Geert Uytterhoeven
2014-05-05 19:16 ` Mark Brown
2014-05-02 17:40 ` Mark Brown
2014-05-05 4:21 ` Maxime Ripard
2014-05-05 19:17 ` Mark Brown
[not found] ` <20140505191723.GK22111-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-05-08 2:22 ` Maxime Ripard
-- strict thread matches above, loose matches on Subject: below --
2015-05-12 20:33 Maxime Ripard
[not found] ` <1431462804-30467-1-git-send-email-maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2015-05-13 11:26 ` Mark Brown
[not found] ` <20150513112604.GI3066-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 12:35 ` Michal Suchanek
2015-05-13 12:51 ` Maxime Ripard
2015-05-13 14:36 ` Mark Brown
[not found] ` <20150513143610.GT2761-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 15:31 ` Michal Suchanek
[not found] ` <CAOMqctTd7xG6mwX9AojTH4uaGDY06xOgDFUP437VDiE0rp0sXA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 17:43 ` Mark Brown
2015-05-13 19:09 ` Maxime Ripard
2015-05-13 19:10 ` Geert Uytterhoeven
[not found] ` <CAMuHMdWJ730G_a6=vQgs4gV837am5KKd7zEhU2FaHw2cpv=aRA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 19:41 ` Maxime Ripard
2015-05-13 15:37 ` Greg Kroah-Hartman
[not found] ` <20150513153740.GC11677-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-05-13 15:52 ` Michal Suchanek
2015-05-13 17:13 ` Mark Brown
[not found] ` <20150513171300.GD2761-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 17:20 ` Greg Kroah-Hartman
[not found] ` <20150513172028.GA18303-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-05-13 17:39 ` Mark Brown
[not found] ` <20150513173922.GF2761-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 18:16 ` Greg Kroah-Hartman
2015-05-13 18:32 ` Mark Brown
[not found] ` <20150513183211.GK2761-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 18:36 ` Greg Kroah-Hartman
[not found] ` <20150513183653.GA879-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-05-13 18:51 ` Mark Brown
[not found] ` <20150513185149.GL2761-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-05-13 19:17 ` Maxime Ripard
2015-05-13 17:50 ` Maxime Ripard
2015-05-13 18:12 ` Mark Brown
2015-05-13 18:17 ` Greg Kroah-Hartman
[not found] ` <20150513181736.GC16811-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-05-13 19:23 ` Geert Uytterhoeven
2015-05-13 19:26 ` Maxime Ripard
2015-05-13 22:33 ` Greg Kroah-Hartman
2015-05-15 8:09 ` Maxime Ripard
[not found] ` <20150513223331.GA26748-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-05-14 14:34 ` Mark Brown
2015-07-15 6:27 ` Lucas De Marchi
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