Re: spi-omap2: AM335x SPI interface 3WIRE mode

[Daniele Nicolodi <daniele@xxxxxxxxxx>]

On 6/7/17 5:01 PM, Daniele Nicolodi wrote:
> Hello,
> 
> I would like to interface a SoC system based on an AM335x processor (in
> the specific a BeagleBone Black) to some peripherals speaking SPI in
> 3-wire mode.
> 
> Looking at the spi-omap2 driver code (kernel version 3.11.4), the 3WIRE
> mode is not supported, but a comment in the code suggests that this may
> be supported by the hardware. The TRM indeed reports that the the McSPI
> in the AM335x processors supports 3-wire SPI.
> 
> Does anyone have the code to add 3-wire SPI mode support to the driver?
> 
> No?! I guess that would have been too much luck.  In that case, can
> someone point me to what needs to be done to add this support to the
> driver?  I may figure it out by myself, but a little guidance would
> probably help to make it happen before I loose interest :-)
> 
> Thank you!  Best,
> Daniele
> 

PS: The emails to the authors of the spi-omap2 driver have bounced. This
is not too surprisingly given the domain is nokia.com.

I'm adding Mark to the recipients of this email as suggested by
get_maintainers.pl.  Who else may be interested on this driver or be
able to comment on my issue?

Thanks! Cheers,
Daniele

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