From: Daniele Nicolodi <daniele-4Vzs6UKX4iGsTnJN9+BGXg@public.gmane.org>
To: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: spi-omap2: AM335x SPI interface 3WIRE mode
Date: Wed, 7 Jun 2017 17:14:22 -0600 [thread overview]
Message-ID: <2ef4a006-5ec2-e8e8-f8f3-58e0079603b7@grinta.net> (raw)
In-Reply-To: <a5070efe-4ed7-b6e3-dd4a-95be963a63b2-4Vzs6UKX4iGsTnJN9+BGXg@public.gmane.org>
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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next prev parent reply other threads:[~2017-06-07 23:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-07 23:01 spi-omap2: AM335x SPI interface 3WIRE mode Daniele Nicolodi
[not found] ` <a5070efe-4ed7-b6e3-dd4a-95be963a63b2-4Vzs6UKX4iGsTnJN9+BGXg@public.gmane.org>
2017-06-07 23:14 ` Daniele Nicolodi [this message]
[not found] ` <2ef4a006-5ec2-e8e8-f8f3-58e0079603b7-4Vzs6UKX4iGsTnJN9+BGXg@public.gmane.org>
2017-06-19 16:32 ` Mark Brown
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