[U-Boot] SPI on PPC MPC85xx

[Jens Gehrlein]

Hi Matthias,

Stefan Roese schrieb:
> Hi Matthias,
> 
> On Wednesday 27 October 2010 08:55:42 Matthias Dunda wrote:
>> unfortunately I have to push this message, as I received no comment on it,
>> yet.
>>
>> Is there a reason why the immap_t is not implemented for mpc85xx?
>>
>> I tried to copy it from mpc8360 but there are so many dependent mpc83xx
>> datatypes in that struct that I postponed the work on that, because I
>> think it'll lead to no success...
>>
>> Even trying to use the soft SPI fails, because first thing the code does is
>> using that immap_t datatype... :-(
>>
>> Does anyone have a comment on this?
> 
> I took a quick glance at this. There are different versions of SPI controllers 
> in the MPC8xxx SoC's. As it seems mpc8xxx_spi.c does "only" support the "CPU-
> mode" (meaning non-CPM/QE-mode) Freescale SPI controllers. This controller is 
> implemented for example in the MPC8349. For your SoC (MPC8568) you need to 
> implement the QE-mode which is currently not supported.

I didn't compare the MPC85xx QE SPI controller with the MPC8xx CPM SPI
controller, but maybe a look at arch/powerpc/cpu/mpc8xx/spi.c could
help you as a base for porting/creating a driver?

-- 
Kind regards,
Jens