RE: Problem with mini-PCI-E slot on P2020RDB

Hi Felix,

-----Original Message-----
From: linuxppc-dev-bounces+priyanka.jain=3Dfreescale.com@lists.ozlabs.org
[mailto:linuxppc-dev-
bounces+priyanka.jain=3Dfreescale.com@lists.ozlabs.org] On Behalf Of Feli=

x

Radensky
Sent: Tuesday, April 12, 2011 10:24 AM
To: Aggrwal Poonam-B10812
Cc: linuxppc-dev@ozlabs.org; Gupta Maneesh-B18878; Kushwaha Prabhakar-
B32579
Subject: Re: Problem with mini-PCI-E slot on P2020RDB
=20
Hi Poonam
=20
On 04/12/2011 07:05 AM, Aggrwal Poonam-B10812 wrote:

quoted

Hello Felix

Please find some comments inline.

Regards
Poonam

quoted

-----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@embedded-sol.com]
Sent: Monday, April 11, 2011 7:16 PM
To: Kushwaha Prabhakar-B32579
Cc: Fabian Bertholm; Leon Woestenberg; linuxppc-dev@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:

quoted

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.
=20
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.
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We are looking into it and are in discussion with design team.

We will keep you posted for the same..

--Prabhakar