Re: [spi-devel-general] [PATCH 7/7] [POWERPC][SPI] spi_mpc83xx: allow use on MPC85xx

[Kumar Gala <galak@kernel.crashing.org>]

On Sep 25, 2007, at 11:58 AM, David Brownell wrote:

>>>> -	depends on SPI_MASTER && PPC_83xx && EXPERIMENTAL
>>>> +	depends on SPI_MASTER && (PPC_83xx || PPC_85xx) && EXPERIMENTAL
>>>
>>> Should that really be just PPC_83xx || QUICC_ENGINE?
>>
>> Well, I thought about that. By now I'm unsure if every QE
>> implementation will be compatible with further ones.
>
> How many other QE implementations exist?  Is that sort of
> gratuitous breakage something Freescale makes a habit of?

We try not to, but HW people are know to do evil things to keep us  
software guys employed.

>> 	So far
>> I've tested this driver on MPC8323 and MPC8568. If we'll see
>> more and more compatible QE SPI controllers, of course we
>> may just do || QUICC_ENGINE.
>>
>> PPC_83xx || PPC_85xx
>> PPC_83xx || QUICC_ENGINE
>>
>> Today first option saves us four bytes. ;-)
>
> It'd be good if someone would look at the relevant docs.
>
> I'll wait for a PPC signoff before I forward this for
> merge with SPI stuff...

I'm still in favor of making it PPC_83xx || QUICC_ENGINE.

So if when we have 87xx with QUICC_ENGINE we don't have to tweak it  
again, but its a minor thing.

- k