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    SubjectRe: [PATCH 1/5] mrst_pmu: driver for Intel Moorestown Power Management Unit
    On 08/03/2011 12:44 PM, Len Brown wrote:
    > From: Len Brown <len.brown@intel.com>
    >
    > The Moorestown (MRST) Power Management Unit (PMU) driver
    > directs the SOC power states in the "Langwell" south complex (SCU).
    >
    > It hooks pci_platform_pm_ops[] and thus observes all PCI ".set_state"
    > requests. For devices in the SC, the pmu driver translates those
    > PCI requests into the appropriate commands for the SCU.
    >
    > The PMU driver helps implement S0i3, a deep system idle power idle state.
    > Entry into S0i3 is via cpuidle, just like regular processor c-states.
    > S0i3 depends on pre-conditions including uni-processor, graphics off,
    > and certain IO devices in the SC must be off. If those pre-conditions
    > are met, then the PMU allows cpuidle to enter S0i3, otherwise such requests
    > are demoted, either to Atom C4 or Atom C6.
    >
    > This driver is based on prototype work by Bruce Flemming,
    > Illyas Mansoor, Rajeev D. Muralidhar, Vishwesh M. Rudramuni,
    > Hari Seshadri and Sujith Thomas. The current driver also
    > includes contributions from H. Peter Anvin, Arjan van de Ven,
    > Kristen Accardi, and Yong Wang.
    >
    > Thanks for additional review feedback from Alan Cox and Randy Dunlap.
    >
    > Signed-off-by: Len Brown <len.brown@intel.com>
    > Acked-by: Alan Cox <alan@linux.intel.com>
    > ---
    > MAINTAINERS | 6 +
    > arch/x86/platform/mrst/Makefile | 1 +
    > arch/x86/platform/mrst/pmu.c | 817 +++++++++++++++++++++++++++++++++++++++
    > arch/x86/platform/mrst/pmu.h | 234 +++++++++++
    > 4 files changed, 1058 insertions(+), 0 deletions(-)
    > create mode 100644 arch/x86/platform/mrst/pmu.c
    > create mode 100644 arch/x86/platform/mrst/pmu.h
    >

    Acked-by: H. Peter Anvin <hpa@linux.intel.com>

    -hpa



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