lkml.org 
[lkml]   [2011]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v9] spi: New driver for Altera SPI
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


\
 
 \ /
  Last update: 2011-02-15 08:05    [W:0.282 / U:0.208 seconds]
©2003-2014 Jasper Spaans. Advertise on this site