Problem with mini-PCI-E slot on P2020RDB

[Kushwaha Prabhakar-B32579]

Hi Felix,

> -----Original Message-----
> From: linuxppc-dev-bounces+priyanka.jain=freescale.com at lists.ozlabs.org
> [mailto:linuxppc-dev-
> bounces+priyanka.jain=freescale.com at lists.ozlabs.org] On Behalf Of Felix
> Radensky
> Sent: Tuesday, April 12, 2011 10:24 AM
> To: Aggrwal Poonam-B10812
> Cc: linuxppc-dev at ozlabs.org; Gupta Maneesh-B18878; Kushwaha Prabhakar-
> B32579
> Subject: Re: Problem with mini-PCI-E slot on P2020RDB
> 
> Hi Poonam
> 
> On 04/12/2011 07:05 AM, Aggrwal Poonam-B10812 wrote:
> > Hello Felix
> >
> > Please find some comments inline.
> >
> > Regards
> > Poonam
> >
> >> -----Original Message-----
> >> From: Kushwaha Prabhakar-B32579
> >> Sent: Tuesday, April 12, 2011 9:26 AM
> >> To: Aggrwal Poonam-B10812
> >> Subject: FW: Problem with mini-PCI-E slot on P2020RDB
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: Felix Radensky [mailto:felix at embedded-sol.com]
> >> Sent: Monday, April 11, 2011 7:16 PM
> >> To: Kushwaha Prabhakar-B32579
> >> Cc: Fabian Bertholm; Leon Woestenberg; linuxppc-dev at ozlabs.org;
> >> Mahajan Vivek-B08308; Aggrwal Poonam-B10812; Gupta Maneesh-B18878
> >> Subject: Re: Problem with mini-PCI-E slot on P2020RDB
> >>
> >> Hi Prabhakar,
> >>
> >> On 04/11/2011 02:09 PM, Kushwaha Prabhakar-B32579 wrote:
> >>> Hi,
> >>>
> >>> Yes. It wil be applicable for all revisions.
> >>>
> >>> Regards,
> >>> Prabhakar
> >>>
> >> I'm sure this is applicable to all revisions, but it doesn't
> >> necessarily makes things work. The problem I've reported back in 2009
> >> still exists on P2020RDB revC, even if I use the latest u-boot and
> >> kernel and make device tree changes that you've suggested.
> >> I've attached the boot log.
> > As such there is no hardware fix related to this issue between RevC to
> RevD. The solution was a software patch to resolve the issue related to
> IRQ0.
> 
> Are you sure ? Please take a look at Freescale document titled
> "P1020E/P2020E RDB System Errata".
> There's errata CE10, IRQ0 held low. It is fixed in Rev D. Vivek Mahajan,
> who looked at the issue back in 2009, estimated that problem can be
> related to missing pull-up on IRQ0. This is exactly what is fixed in Rev
> D.
> 

We are looking into it and are in discussion with design team.

We will keep you posted for the same..

--Prabhakar