All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ned Forrester <nforrester-/d+BM93fTQY@public.gmane.org>
To: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
Cc: spi-devel
	<spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: Re: SPI Framework chip select
Date: Sun, 02 Mar 2008 09:08:29 -0500	[thread overview]
Message-ID: <47CAB4DD.4000007@whoi.edu> (raw)
In-Reply-To: <200803011858.14400.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>

David Brownell wrote:
> On Saturday 01 March 2008, Ned Forrester wrote:
>> You can assign spi_device.chip_select=0 for all chips, and as
>> long as you supply a unique
>> spi_device->controller_data->pxa2xx_spi_chip.cs_control for each chip,
>> chip select will work as intended.
> 
> The SPI core would reject such an atrocity.  :)

Well, if you are sure, I suppose it must be somewhere.  I could only
find a check for chip->chip_select >= master->num_chipselect in
spi_new_device(), but not any comparison between chp_select values of
different chips.  Probably I don't know where to find all the files of
the SPI core.

-- 
Ned Forrester                                       nforrester-/d+BM93fTQY@public.gmane.org
Oceanographic Systems Lab                                  508-289-2226
Applied Ocean Physics and Engineering Dept.
Woods Hole Oceanographic Institution          Woods Hole, MA 02543, USA
http://www.whoi.edu/sbl/liteSite.do?litesiteid=7212
http://www.whoi.edu/hpb/Site.do?id=1532
http://www.whoi.edu/page.do?pid=10079


-------------------------------------------------------------------------
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/

      parent reply	other threads:[~2008-03-02 14:08 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-29 18:52 SPI Framework chip select Ned Forrester
     [not found] ` <47C85451.1030809-/d+BM93fTQY@public.gmane.org>
2008-02-29 20:04   ` David Brownell
     [not found]     ` <200802291204.33911.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-02-29 20:53       ` Ned Forrester
     [not found]         ` <47C870D5.7000109-/d+BM93fTQY@public.gmane.org>
2008-02-29 21:38           ` David Brownell
     [not found]             ` <200802291338.55149.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-02-29 22:30               ` Ned Forrester
     [not found]                 ` <47C88793.1050205-/d+BM93fTQY@public.gmane.org>
2008-03-01 20:37                   ` David Brownell
     [not found]                     ` <200803011237.51349.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-03-02  1:14                       ` Ned Forrester
     [not found]                         ` <47C9FF5E.5060503-/d+BM93fTQY@public.gmane.org>
2008-03-02  2:58                           ` David Brownell
     [not found]                             ` <200803011858.14400.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-03-02 14:08                               ` Ned Forrester [this message]

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=47CAB4DD.4000007@whoi.edu \
    --to=nforrester-/d+bm93ftqy@public.gmane.org \
    --cc=david-b-yBeKhBN/0LDR7s880joybQ@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.