LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Thomas Chou <thomas@wytron.com.tw>
To: Ryan Mallon <ryan@bluewatersys.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>,
	Grant Likely <grant.likely@secretlab.ca>,
	linux-kernel@vger.kernel.org, nios2-dev@sopc.et.ntust.edu.tw,
	devicetree-discuss@lists.ozlabs.org,
	spi-devel-general@lists.sourceforge.net
Subject: Re: [PATCH v9] spi: New driver for Altera SPI
Date: Tue, 15 Feb 2011 15:04:49 +0800	[thread overview]
Message-ID: <4D5A2591.5090901@wytron.com.tw> (raw)
In-Reply-To: <4D58917E.9050408@bluewatersys.com>

Dear Ryan,

On 02/14/2011 10:20 AM, Ryan Mallon wrote:
> On 02/14/2011 03:10 PM, Thomas Chou wrote:
>> This patch adds a new SPI driver to support the Altera SOPC Builder
>> SPI component. It uses the bitbanging library.
>>
>> Signed-off-by: Thomas Chou<thomas@wytron.com.tw>
>> ---
>
>> +struct altera_spi {
>> +	/* bitbang has to be first */
>> +	struct spi_bitbang bitbang;
>
> Is this still true? I had a quick look and can't see anything which
> relies on spi_bitbang being the first entry. Things like this should be
> using container_of so that position in the struct is irrelevant.
>
> ~Ryan
>

Yes, sadly true. This is due to the implementation of the bitbanging 
library, spi_bitbang.c, which assumes the struct spi_bitbang is the 
first of drvdata. Though it could be changed in the future (beyond this 
little driver), every bitbanging library user has to follow this for now.

Best regards,
Thomas

  reply	other threads:[~2011-02-15  7:01 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-08  6:03 [PATCH] " Thomas Chou
2011-01-17  5:46 ` [PATCH v2] " Thomas Chou
2011-01-17  5:59   ` Stephen Rothwell
2011-01-17  6:22     ` Thomas Chou
2011-01-17  6:45       ` Grant Likely
2011-01-17  7:04         ` [PATCH v3] " Thomas Chou
2011-01-17  7:27           ` Sinan Akman
2011-01-18  1:33             ` Thomas Chou
2011-01-19  1:36             ` Thomas Chou
2011-01-17  6:56   ` [PATCH v2] " Grant Likely
2011-01-17  7:13     ` [PATCH v4] " Thomas Chou
2011-01-17  7:42       ` Grant Likely
2011-01-24  6:38         ` [PATCH v5] " Thomas Chou
2011-02-03 10:02           ` [PATCH v6] " Thomas Chou
2011-02-03 17:34             ` Grant Likely
2011-02-05 13:08               ` Thomas Chou
2011-02-05 14:02               ` [PATCH v7] " Thomas Chou
2011-02-06 20:23                 ` Peter Korsgaard
2011-02-08  2:43                   ` Thomas Chou
2011-02-08  5:21                   ` [PATCH v8] " Thomas Chou
2011-02-14  2:10                     ` [PATCH v9] " Thomas Chou
2011-02-14  2:20                       ` Ryan Mallon
2011-02-15  7:04                         ` Thomas Chou [this message]
2011-02-15  9:12                           ` Ryan Mallon
2011-02-15 19:42                           ` Grant Likely
2011-02-15 21:58                             ` Ryan Mallon
2011-02-16  2:47                       ` 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=4D5A2591.5090901@wytron.com.tw \
    --to=thomas@wytron.com.tw \
    --cc=dbrownell@users.sourceforge.net \
    --cc=devicetree-discuss@lists.ozlabs.org \
    --cc=grant.likely@secretlab.ca \
    --cc=linux-kernel@vger.kernel.org \
    --cc=nios2-dev@sopc.et.ntust.edu.tw \
    --cc=ryan@bluewatersys.com \
    --cc=spi-devel-general@lists.sourceforge.net \
    --subject='Re: [PATCH v9] spi: New driver for Altera SPI' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).