Re: Hidden differences between hp620/660 and hp680/690

[Magnus D. <mag...@gm...>]

Hi Kristoffer,

On 8/2/07, Kristoffer Ericson <kri...@gm...> wrote:
> Greetings,
>
> Wanted some expert input on this. We are having situations where things are working perfectly fine on hp680/690 while working badly on 620/660lx.
>
> Examples:
> New alsa sounddriver works perfectly fine on hp680/hp690 but not at all on 620/660
> Pata platform driver works perfectly fine on hp680/hp690 while not at all on 620/660, we have solved this by doing polling instead.
> HP680/HP690 reports 7729 CPU, while 620/660 reports 7708. ?
>
> Any ideas anyone? Assume 7709 vs 7708 would this explain the issues?

Not sure, but 7708 is missing a few things compared to the rest of the
770x. For interrupt related stuff please have a look at the newly
added setup-sh770x.c file. I guess the most important part of it from
my interrupt point of view is that 7708 doesn't support pint. And I
remember something about CF on pint, but I'm not sure it that's true
for all models. So there you have something related to your
pata_platform polling. The DMA controller is also missing from 7708,
maybe that one is used by the sound driver?

It would be useful with more hardware information. Are there any
documents out there where people have marked out which pins that go
where? If you can find that then it should be pretty easy hack up
kernel support for all models. sh3-based models at least that is. =)

/ magnus