On 08/03/2011 12:44 PM, Len Brown wrote: > From: Len Brown <len.brown@xxxxxxxxx> > > 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@xxxxxxxxx> > Acked-by: Alan Cox <alan@xxxxxxxxxxxxxxx> > --- > 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@xxxxxxxxxxxxxxx> -hpa _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
