> -----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 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
