> -----Original Message----- > From: Kumar Gala [mailto:ga...@kernel.crashing.org] > Sent: Friday, July 27, 2012 9:24 PM > To: Jia Hongtao-B38951 > Cc: linuxppc-dev@lists.ozlabs.org; Wood Scott-B07421; Li Yang-R58472 > Subject: Re: [PATCH 5/6] powerpc/fsl-pci: Add pci inbound/outbound PM > support > > > On Jul 24, 2012, at 5:20 AM, Jia Hongtao wrote: > > > Power supply for PCI inbound/outbound window registers is off when > system > > go to deep-sleep state. We save the values of registers before suspend > > and restore to registers after resume. > > > > Signed-off-by: Jiang Yutang <b14...@freescale.com> > > Signed-off-by: Jia Hongtao <b38...@freescale.com> > > Signed-off-by: Li Yang <le...@freescale.com> > > --- > > arch/powerpc/include/asm/pci-bridge.h | 2 +- > > arch/powerpc/sysdev/fsl_pci.c | 121 > +++++++++++++++++++++++++++++++++ > > 2 files changed, 122 insertions(+), 1 deletions(-) > > Remind me why we need to save/restore PCI ATMUs, why not just re-parse > the device tree to restore? > > - k
Save/restore is the more efficient way. Latency of sleep/wakeup is one of most important features in power management. -Hongtao. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
