[PATCH -mm][POWERPC] mpc8xxx : allow SPI without cs.

Leon Woestenberg leon.woestenberg at gmail.com
Fri Jun 19 21:45:46 EST 2009


Hello,

On Thu, Jun 18, 2009 at 4:04 PM, Kumar Gala<galak at kernel.crashing.org> wrote:
> On Jun 18, 2009, at 8:09 AM, Anton Vorontsov wrote:
>> On Thu, Jun 18, 2009 at 08:19:44AM +0200, Rini van Zetten wrote:
>>>
>>> This patch adds the possibility to have a spi device without a cs.
>>>
> That is a good question.  What HW is this for (I don't think its for eSPI
> but I could be wrong).
>
We need SPI without CS too on our MPC8313E design.

In our case having a CS line to each slave (18 of them) is too
expensive and we use a chip select which piggy backs on another
signal.
Once the slave is selected, SPI is used to send large amounts of data.

Regards,
-- 
Leon


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