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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
next prev parent 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] spi: New driver for Altera SPI 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
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