On Jul 30, 2012, at 1:09 AM, Jia Hongtao-B38951 wrote:
quoted
-----Original Message-----
From: Kumar Gala [mailto:<redacted>]
Sent: Friday, July 27, 2012 9:24 PM
To: Jia Hongtao-B38951
Cc: <redacted>; Wood Scott-B07421; Li Yang-R58472
Subject: Re: [PATCH 5/6] powerpc/fsl-pci: Add pci inbound/outbound PM
support
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On Jul 24, 2012, at 5:20 AM, Jia Hongtao wrote:
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quoted
Power supply for PCI inbound/outbound window registers is off when
system
quoted
go to deep-sleep state. We save the values of registers before =
suspend
quoted
quoted
and restore to registers after resume.
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Signed-off-by: Jiang Yutang <redacted>
Signed-off-by: Jia Hongtao <redacted>
Signed-off-by: Li Yang <redacted>
---
arch/powerpc/include/asm/pci-bridge.h | 2 +-
arch/powerpc/sysdev/fsl_pci.c | 121
+++++++++++++++++++++++++++++++++
quoted
2 files changed, 122 insertions(+), 1 deletions(-)
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Remind me why we need to save/restore PCI ATMUs, why not just =
re-parse
quoted
the device tree to restore?
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- k
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Save/restore is the more efficient way. Latency of sleep/wakeup is one =
of
most important features in power management.
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-Hongtao.
I don't think the time it takes to run through setup_pci_atmu() is that =
long compared to fsl_pci_resume().
Also, don't you need to setup PCICCSRBAR and do setup_pci_cmd() on =
resume?
- k=