On May 19, 2011, at 11:41 PM, Kushwaha Prabhakar-B32579 wrote: > > >> -----Original Message----- >> From: Kumar Gala [mailto:ga...@kernel.crashing.org] >> Sent: Thursday, May 19, 2011 6:53 PM >> To: Kushwaha Prabhakar-B32579 >> Cc: linuxppc-dev@lists.ozlabs.org; meet2pra...@gmail.com; Jiang Yutang- >> B14898 >> Subject: Re: [PATCH] powerpc/85xx: Save and restore pcie ATMU windows for >> PM >> >> >> 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:ga...@kernel.crashing.org] >>>> Sent: Thursday, May 19, 2011 12:00 PM >>>> To: Kushwaha Prabhakar-B32579 >>>> Cc: linuxppc-dev@lists.ozlabs.org; meet2pra...@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 <b14...@freescale.com> >>>>> Signed-off-by: Prabhakar Kushwaha <prabha...@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. > > Till now, No SOC was supporting D3 cold state. First time P1022 supporting it. > Note: D3 cold state == PCIe block Power down > > --Prabhakar
how do we test this ? - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
