Re: [RFC PATCH 0/4] Describe SPI devices in the OF device tree and add mpc5200-spi driver

Jon Smirl
2008-05-16T21:25:38Z

On 5/16/08, Grant Likely <grant.likely@secretlab.ca> wrote:
> On Fri, May 16, 2008 at 2:27 PM, Jon Smirl <jonsmirl@gmail.com> wrote:
> > On 5/16/08, Grant Likely <grant.likely@secretlab.ca> wrote:
> >> This series is a set of changes to allow the slaves on an SPI bus to be
> >> described in the OF device tree (useful in arch/powerpc) and adds a driver
> >> that uses it (the Freescale MPC5200 SoC's SPI device).
> >
> > Right now we have SPI hooked up to PSC3. Hardware engineer is gone but
> > I'll see if I can get him to alter things to use the SPI controller. I
> > have an old mail from him where he thinks the Phytec board is missing
> > a signal needed to use the SPI controller.
>
>
> While I'd appreciate the testing, I suspect that you really don't want
> to do that. The dedicated SPI controller isn't very good. It only
> does a byte at a time and so is rather slow. A PSC is SPI mode should
> be better (but I haven't tried it personally it yet).

What is the device tree node for PSC3 supposed to look like when it
has both serial and spi enabled?

--
Jon Smirl
jonsmirl@gmail.com