[PATCH] powerpc/85xx: Save and restore pcie ATMU windows for PM

[Kumar Gala]

On May 19, 2011, at 6:22 AM, Kushwaha Prabhakar-B32579 wrote:

> Hi Kumar,
>  Please find my answer in-lined
> 
>> -----Original Message-----
>> From: Kumar Gala [mailto:galak at kernel.crashing.org]
>> Sent: Thursday, May 19, 2011 12:00 PM
>> To: Kushwaha Prabhakar-B32579
>> Cc: linuxppc-dev at lists.ozlabs.org; meet2prabhu at gmail.com; Jiang Yutang-
>> B14898
>> Subject: Re: [PATCH] powerpc/85xx: Save and restore pcie ATMU windows for
>> PM
>> 
>> 
>> On Apr 28, 2011, at 1:38 AM, Prabhakar Kushwaha wrote:
>> 
>>> D3-cold state indicates removal of the clock and power. however
>>> auxiliary (AUX) Power may remain available even after the main power
>> rails are powered down.
>>> 
>>> wakeup from D3-cold state requires full context restore. Other things
>>> are taken care in pci-driver except ATMUs.
>>> ATMU windows needs to be saved and restored during suspend and resume.
>>> 
>>> Signed-off-by: Jiang Yutang <b14898 at freescale.com>
>>> Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
>>> ---
>>> Based upon
>>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git(b
>>> ranch master)
>>> 
>>> arch/powerpc/sysdev/fsl_pci.c |  116
>> +++++++++++++++++++++++++++++++++++++++++
>>> arch/powerpc/sysdev/fsl_pci.h |    7 ++-
>>> 2 files changed, 121 insertions(+), 2 deletions(-)
>> 
>> Is this patch for when we are a host or agent?
> 
> This patch is independent of host or agent. It is for supporting D3 cold state for P1022.
> These functions are called during System level suspend and resume. 
> 
> --Prabhakar

I'm trying to figure out why this is limited to P1022.

- k