• Linus Torvalds's avatar
    Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 43964409
    Linus Torvalds authored
    Pull power management updates from Rafael Wysocki:
     "This time (again) cpufreq gets the majority of changes which mostly
      are driver updates (including a major consolidation of intel_pstate),
      some schedutil governor modifications and core cleanups.
    
      There also are some changes in the system suspend area, mostly related
      to diagnostics and debug messages plus some renames of things related
      to suspend-to-idle. One major change here is that suspend-to-idle is
      now going to be preferred over S3 on systems where the ACPI tables
      indicate to do so and provide requsite support (the Low Power Idle S0
      _DSM in particular). The system sleep documentation and the tools
      related to it are updated too.
    
      The rest is a few cpuidle changes (nothing major), devfreq updates,
      generic power domains (genpd) framework updates and a few assorted
      modifications elsewhere.
    
      Specifics:
    
       - Drop the P-state selection algorithm based on a PID controller from
         intel_pstate and make it use the same P-state selection method
         (based on the CPU load) for all types of systems in the active mode
         (Rafael Wysocki, Srinivas Pandruvada).
    
       - Rework the cpufreq core and governors to make it possible to take
         cross-CPU utilization updates into account and modify the schedutil
         governor to actually do so (Viresh Kumar).
    
       - Clean up the handling of transition latency information in the
         cpufreq core and untangle it from the information on which drivers
         cannot do dynamic frequency switching (Viresh Kumar).
    
       - Add support for new SoCs (MT2701/MT7623 and MT7622) to the mediatek
         cpufreq driver and update its DT bindings (Sean Wang).
    
       - Modify the cpufreq dt-platdev driver to autimatically create
         cpufreq devices for the new (v2) Operating Performance Points (OPP)
         DT bindings and update its whitelist of supported systems (Viresh
         Kumar, Shubhrajyoti Datta, Marc Gonzalez, Khiem Nguyen, Finley
         Xiao).
    
       - Add support for Ux500 to the cpufreq-dt driver and drop the
         obsolete dbx500 cpufreq driver (Linus Walleij, Arnd Bergmann).
    
       - Add new SoC (R8A7795) support to the cpufreq rcar driver (Khiem
         Nguyen).
    
       - Fix and clean up assorted issues in the cpufreq drivers and core
         (Arvind Yadav, Christophe Jaillet, Colin Ian King, Gustavo Silva,
         Julia Lawall, Leonard Crestez, Rob Herring, Sudeep Holla).
    
       - Update the IO-wait boost handling in the schedutil governor to make
         it less aggressive (Joel Fernandes).
    
       - Rework system suspend diagnostics to make it print fewer messages
         to the kernel log by default, add a sysfs knob to allow more
         suspend-related messages to be printed and add Low Power S0 Idle
         constraints checks to the ACPI suspend-to-idle code (Rafael
         Wysocki, Srinivas Pandruvada).
    
       - Prefer suspend-to-idle over S3 on ACPI-based systems with the
         ACPI_FADT_LOW_POWER_S0 flag set and the Low Power Idle S0 _DSM
         interface present in the ACPI tables (Rafael Wysocki).
    
       - Update documentation related to system sleep and rename a number of
         items in the code to make it cleare that they are related to
         suspend-to-idle (Rafael Wysocki).
    
       - Export a variable allowing device drivers to check the target
         system sleep state from the core system suspend code (Florian
         Fainelli).
    
       - Clean up the cpuidle subsystem to handle the polling state on x86
         in a more straightforward way and to use %pOF instead of full_name
         (Rafael Wysocki, Rob Herring).
    
       - Update the devfreq framework to fix and clean up a few minor issues
         (Chanwoo Choi, Rob Herring).
    
       - Extend diagnostics in the generic power domains (genpd) framework
         and clean it up slightly (Thara Gopinath, Rob Herring).
    
       - Fix and clean up a couple of issues in the operating performance
         points (OPP) framework (Viresh Kumar, Waldemar Rymarkiewicz).
    
       - Add support for RV1108 to the rockchip-io Adaptive Voltage Scaling
         (AVS) driver (David Wu).
    
       - Fix the usage of notifiers in CPU power management on some
         platforms (Alex Shi).
    
       - Update the pm-graph system suspend/hibernation and boot profiling
         utility (Todd Brandt).
    
       - Make it possible to run the cpupower utility without CPU0 (Prarit
         Bhargava)"
    
    * tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (87 commits)
      cpuidle: Make drivers initialize polling state
      cpuidle: Move polling state initialization code to separate file
      cpuidle: Eliminate the CPUIDLE_DRIVER_STATE_START symbol
      cpufreq: imx6q: Fix imx6sx low frequency support
      cpufreq: speedstep-lib: make several arrays static, makes code smaller
      PM: docs: Delete the obsolete states.txt document
      PM: docs: Describe high-level PM strategies and sleep states
      PM / devfreq: Fix memory leak when fail to register device
      PM / devfreq: Add dependency on PM_OPP
      PM / devfreq: Move private devfreq_update_stats() into devfreq
      PM / devfreq: Convert to using %pOF instead of full_name
      PM / AVS: rockchip-io: add io selectors and supplies for RV1108
      cpufreq: ti: Fix 'of_node_put' being called twice in error handling path
      cpufreq: dt-platdev: Drop few entries from whitelist
      cpufreq: dt-platdev: Automatically create cpufreq device with OPP v2
      ARM: ux500: don't select CPUFREQ_DT
      cpuidle: Convert to using %pOF instead of full_name
      cpufreq: Convert to using %pOF instead of full_name
      PM / Domains: Convert to using %pOF instead of full_name
      cpufreq: Cap the default transition delay value to 10 ms
      ...
    43964409
intel_idle.c 36.4 KB