From: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
To: "Grant Likely" <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: fabrizio.garetto-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
Segher Boessenkool
<segher-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Guennadi Liakhovetski
<g.liakhovetski-Mmb7MZpHnFY@public.gmane.org>
Subject: Re: [PATCH 3/4] spi: Add OF binding support for SPI busses
Date: Sat, 24 May 2008 00:13:27 -0700 [thread overview]
Message-ID: <200805240013.28044.david-b@pacbell.net> (raw)
In-Reply-To: <fa686aa40805232325w65d4f706i50798121a8cce263-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Friday 23 May 2008, Grant Likely wrote:
> Very good point. Okay, so we cannot assume any correlation between
> the number of CS lines and the number of child nodes to the SPI bus.
That wasn't what I was implying ... all the devices hooked
up to a given chipselect should be viewed as a single (albeit
composite) child node.
Now, the driver for that child node may want to expose lots
of substructure. But that's no different from any other
complex device, whose protocol happens to embed some notion
of component addressing.
It's just that in the case I mentioned, that addressing is
a bit more externally visible than it is in some other cases.
- Dave
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
WARNING: multiple messages have this Message-ID (diff)
From: David Brownell <david-b@pacbell.net>
To: "Grant Likely" <grant.likely@secretlab.ca>
Cc: fabrizio.garetto@gmail.com, linux-kernel@vger.kernel.org,
linuxppc-dev@ozlabs.org, spi-devel-general@lists.sourceforge.net,
Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Subject: Re: [spi-devel-general] [PATCH 3/4] spi: Add OF binding support for SPI busses
Date: Sat, 24 May 2008 00:13:27 -0700 [thread overview]
Message-ID: <200805240013.28044.david-b@pacbell.net> (raw)
In-Reply-To: <fa686aa40805232325w65d4f706i50798121a8cce263@mail.gmail.com>
On Friday 23 May 2008, Grant Likely wrote:
> Very good point. Okay, so we cannot assume any correlation between
> the number of CS lines and the number of child nodes to the SPI bus.
That wasn't what I was implying ... all the devices hooked
up to a given chipselect should be viewed as a single (albeit
composite) child node.
Now, the driver for that child node may want to expose lots
of substructure. But that's no different from any other
complex device, whose protocol happens to embed some notion
of component addressing.
It's just that in the case I mentioned, that addressing is
a bit more externally visible than it is in some other cases.
- Dave
WARNING: multiple messages have this Message-ID (diff)
From: David Brownell <david-b@pacbell.net>
To: "Grant Likely" <grant.likely@secretlab.ca>
Cc: spi-devel-general@lists.sourceforge.net,
"Segher Boessenkool" <segher@kernel.crashing.org>,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
fabrizio.garetto@gmail.com,
"Guennadi Liakhovetski" <g.liakhovetski@gmx.de>
Subject: Re: [spi-devel-general] [PATCH 3/4] spi: Add OF binding support for SPI busses
Date: Sat, 24 May 2008 00:13:27 -0700 [thread overview]
Message-ID: <200805240013.28044.david-b@pacbell.net> (raw)
In-Reply-To: <fa686aa40805232325w65d4f706i50798121a8cce263@mail.gmail.com>
On Friday 23 May 2008, Grant Likely wrote:
> Very good point. Okay, so we cannot assume any correlation between
> the number of CS lines and the number of child nodes to the SPI bus.
That wasn't what I was implying ... all the devices hooked
up to a given chipselect should be viewed as a single (albeit
composite) child node.
Now, the driver for that child node may want to expose lots
of substructure. But that's no different from any other
complex device, whose protocol happens to embed some notion
of component addressing.
It's just that in the case I mentioned, that addressing is
a bit more externally visible than it is in some other cases.
- Dave
next prev parent reply other threads:[~2008-05-24 7:13 UTC|newest]
Thread overview: 134+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 19:35 [RFC PATCH 0/4] Describe SPI devices in the OF device tree and add mpc5200-spi driver Grant Likely
2008-05-16 19:35 ` Grant Likely
2008-05-16 19:36 ` [PATCH 1/4] spi: Change modalias from a pointer to a character array Grant Likely
2008-05-16 19:36 ` Grant Likely
2008-05-16 19:36 ` [PATCH 2/4] spi: split up spi_new_device() to allow two stage registration Grant Likely
2008-05-16 19:36 ` Grant Likely
[not found] ` <20080516193608.28030.34968.stgit-8FIgwK2HfyId2tlXD8uQ6/kpB+XfMlBf@public.gmane.org>
2008-05-22 0:17 ` David Brownell
2008-05-22 0:17 ` David Brownell
2008-05-22 0:17 ` David Brownell
[not found] ` <200805211717.13206.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-24 6:43 ` Grant Likely
2008-05-24 6:43 ` Grant Likely
2008-05-24 6:43 ` Grant Likely
[not found] ` <fa686aa40805232343x20031560j5659d203e25f494-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-24 6:54 ` Grant Likely
2008-05-24 6:54 ` Grant Likely
2008-05-24 6:54 ` Grant Likely
[not found] ` <fa686aa40805232354g147acfcdx4753fce1a448ceb7-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-06-30 4:08 ` David Brownell
2008-06-30 4:08 ` David Brownell
2008-06-30 4:08 ` David Brownell
2008-06-17 7:28 ` Grant Likely
2008-06-17 7:28 ` Grant Likely
2008-06-17 7:28 ` Grant Likely
[not found] ` <fa686aa40806170028t2ccb679k22d2d3cea793ebc1-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-06-30 4:10 ` David Brownell
2008-06-30 4:10 ` David Brownell
2008-06-30 4:10 ` David Brownell
2008-05-16 19:36 ` [PATCH 3/4] spi: Add OF binding support for SPI busses Grant Likely
2008-05-16 19:36 ` Grant Likely
[not found] ` <20080516193613.28030.13950.stgit-8FIgwK2HfyId2tlXD8uQ6/kpB+XfMlBf@public.gmane.org>
2008-05-16 20:47 ` Randy Dunlap
2008-05-16 20:47 ` Randy Dunlap
2008-05-16 20:47 ` Randy Dunlap
2008-05-16 20:51 ` Grant Likely
2008-05-16 20:51 ` Grant Likely
2008-05-16 22:03 ` Anton Vorontsov
2008-05-16 22:03 ` Anton Vorontsov
2008-05-16 22:03 ` Anton Vorontsov
2008-05-16 22:14 ` Grant Likely
2008-05-16 22:14 ` Grant Likely
2008-05-16 22:14 ` Grant Likely
[not found] ` <fa686aa40805161514r513d0eebt380a76f64abe8434-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-16 22:49 ` Anton Vorontsov
2008-05-16 22:49 ` Anton Vorontsov
2008-05-16 22:49 ` Anton Vorontsov
2008-05-17 5:02 ` Grant Likely
2008-05-17 5:02 ` Grant Likely
2008-05-17 5:02 ` Grant Likely
[not found] ` <fa686aa40805162202m336aade4qd6cfa5b17d6f3892-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-22 1:16 ` David Brownell
2008-05-22 1:16 ` David Brownell
2008-05-22 1:16 ` David Brownell
[not found] ` <200805211816.10753.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-24 6:24 ` Grant Likely
2008-05-24 6:24 ` Grant Likely
2008-05-24 6:24 ` Grant Likely
2008-05-19 13:17 ` Guennadi Liakhovetski
2008-05-19 13:17 ` Guennadi Liakhovetski
2008-05-19 13:17 ` Guennadi Liakhovetski
2008-05-19 15:57 ` Grant Likely
2008-05-19 15:57 ` Grant Likely
2008-05-19 16:30 ` Guennadi Liakhovetski
2008-05-19 16:30 ` Guennadi Liakhovetski
[not found] ` <Pine.LNX.4.64.0805191811510.29559-0199iw4Nj15frtckUFj5Ag@public.gmane.org>
2008-05-20 5:13 ` Grant Likely
2008-05-20 5:13 ` Grant Likely
2008-05-20 5:13 ` Grant Likely
2008-05-20 15:26 ` Guennadi Liakhovetski
2008-05-20 15:26 ` Guennadi Liakhovetski
[not found] ` <Pine.LNX.4.64.0805201650280.5283-0199iw4Nj15frtckUFj5Ag@public.gmane.org>
2008-05-20 15:48 ` Grant Likely
2008-05-20 15:48 ` Grant Likely
2008-05-20 15:48 ` Grant Likely
2008-05-21 19:11 ` Segher Boessenkool
2008-05-21 19:11 ` Segher Boessenkool
2008-05-21 19:11 ` Segher Boessenkool
[not found] ` <716a0f1b6c9a544b480c06a329072483-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2008-05-21 19:33 ` Grant Likely
2008-05-21 19:33 ` Grant Likely
2008-05-21 19:33 ` Grant Likely
[not found] ` <fa686aa40805211233h72a258bpf8c945b9f662d6ee-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-23 2:26 ` David Brownell
2008-05-23 2:26 ` [spi-devel-general] " David Brownell
2008-05-23 2:26 ` David Brownell
[not found] ` <200805221926.24112.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-24 6:25 ` Grant Likely
2008-05-24 6:25 ` [spi-devel-general] " Grant Likely
2008-05-24 6:25 ` Grant Likely
[not found] ` <fa686aa40805232325w65d4f706i50798121a8cce263-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-24 7:13 ` David Brownell [this message]
2008-05-24 7:13 ` David Brownell
2008-05-24 7:13 ` David Brownell
2008-05-19 17:09 ` Gary Jennejohn
2008-05-19 17:09 ` Gary Jennejohn
[not found] ` <20080519190900.01ec3b2a-f7AvneZ2CE0iXleZOAq1AWD2FQJk+8+b@public.gmane.org>
2008-05-19 17:19 ` Anton Vorontsov
2008-05-19 17:19 ` Anton Vorontsov
2008-05-19 17:19 ` Anton Vorontsov
2008-05-20 12:26 ` Gary Jennejohn
2008-05-21 15:19 ` Anton Vorontsov
2008-05-21 15:19 ` Anton Vorontsov
2008-05-21 15:19 ` Anton Vorontsov
[not found] ` <20080521151928.GA28857-PHTr8nzUCjejyJ0x5qLZdcN33GVbZNy3@public.gmane.org>
2008-05-23 2:05 ` David Brownell
2008-05-23 2:05 ` David Brownell
2008-05-23 2:05 ` David Brownell
[not found] ` <200805221905.32288.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-24 6:26 ` Grant Likely
2008-05-24 6:26 ` Grant Likely
2008-05-24 6:26 ` Grant Likely
[not found] ` <fa686aa40805232326w35f455d1s274899160d47eccb-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-24 16:50 ` Grant Likely
2008-05-24 16:50 ` Grant Likely
2008-05-24 16:50 ` Grant Likely
[not found] ` <fa686aa40805240950ocd16b97y308a54c68efa28ef-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-24 17:14 ` Jochen Friedrich
2008-05-24 17:14 ` Jochen Friedrich
2008-05-24 17:14 ` Jochen Friedrich
[not found] ` <48384D13.6010608-NIgtFMG+Po8@public.gmane.org>
2008-05-24 17:33 ` Grant Likely
2008-05-24 17:33 ` Grant Likely
2008-05-24 17:33 ` Grant Likely
[not found] ` <fa686aa40805241033x128c30b0v826717cc879a712e-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-24 17:45 ` David Brownell
2008-05-24 17:45 ` David Brownell
2008-05-24 17:45 ` David Brownell
[not found] ` <200805241045.47448.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-25 4:56 ` Grant Likely
2008-05-25 4:56 ` Grant Likely
2008-05-25 4:56 ` Grant Likely
2008-05-24 17:43 ` David Brownell
2008-05-24 17:43 ` David Brownell
2008-05-24 17:43 ` David Brownell
[not found] ` <200805221915.59878.david-b@pacbell.net>
[not found] ` <200805221915.59878.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-24 6:31 ` Grant Likely
[not found] ` <fa686aa40805232331p1bf2c1bcn8c46c21a094ef01e-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-24 16:50 ` David Brownell
[not found] ` <200805240950.43394.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-05-24 16:53 ` Grant Likely
2008-05-16 19:36 ` [PATCH 4/4] [CSB] Add new mpc5200-spi (non-psc) device driver Grant Likely
2008-05-16 19:36 ` Grant Likely
2008-05-16 19:42 ` Grant Likely
[not found] ` <20080516193054.28030.35126.stgit-8FIgwK2HfyId2tlXD8uQ6/kpB+XfMlBf@public.gmane.org>
2008-05-16 20:27 ` [RFC PATCH 0/4] Describe SPI devices in the OF device tree and add mpc5200-spi driver Jon Smirl
2008-05-16 20:27 ` Jon Smirl
2008-05-16 20:27 ` Jon Smirl
[not found] ` <9e4733910805161327u4c42fd1dg5b09319d89db447c-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-16 20:48 ` Grant Likely
2008-05-16 20:48 ` Grant Likely
2008-05-16 20:48 ` Grant Likely
[not found] ` <fa686aa40805161348t52b94956w112ef6926ff30892-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-16 21:25 ` Jon Smirl
2008-05-16 21:25 ` Jon Smirl
2008-05-16 21:25 ` Jon Smirl
[not found] ` <9e4733910805161425i2d6cc034y3377af053a4198b5-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-16 21:32 ` Grant Likely
2008-05-16 21:32 ` Grant Likely
2008-05-16 21:32 ` Grant Likely
[not found] ` <fa686aa40805161432w6b5243f9nb0d0c32a87d86d02-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-05-16 21:42 ` Jon Smirl
2008-05-16 21:42 ` Jon Smirl
2008-05-16 21:42 ` Jon Smirl
2008-05-16 21:58 ` Grant Likely
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=200805240013.28044.david-b@pacbell.net \
--to=david-b-ybekhbn/0ldr7s880joybq@public.gmane.org \
--cc=fabrizio.garetto-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=g.liakhovetski-Mmb7MZpHnFY@public.gmane.org \
--cc=grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org \
--cc=segher-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org \
--cc=spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.