SLAVE Side SPI kernel driver development

On Fri, Aug 24, 2012 at 11:57 AM, Bastelli Carlo (yahoo)
[off-list ref] wrote:

Hello, I'm Carlo, I have a difficult task at work, my boss asked me to
develop
 a driver SPI slave side on embedded ARM processor running Linux.
Precisely linux occur on the SPI bus as a slave, not master as required
by the hierarchical structure of the current kernel. The new driver
will
 receive via interrupt and respond when selected by its chip select. Can
 anyone suggest the best way to develop this driver?. Personally, I
have identified two main roads, the first if possible to exploit the
structure SPI master driver, with a few tricks that now I can not
define. The second most radical, write a driver for a UART like, but
managing the SPI device.
Thank you for any suggestions or examples.

Marek got spi slave running on a mx28. See his patch:
http://www.spinics.net/lists/arm-kernel/msg190860.html

Regards,

Fabio Estevam