Merge tag 'pm-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These add ACPI support to the intel_idle driver along with an admin
  guide document for it, add support for CPR (Core Power Reduction) to
  the AVS (Adaptive Voltage Scaling) subsystem, add new hardware support
  in a few places, add some new sysfs attributes, debugfs files and
  tracepoints, fix bugs and clean up a bunch of things all over.

  Specifics:

   - Update the ACPI processor driver in order to export
     acpi_processor_evaluate_cst() to the code outside of it, add ACPI
     support to the intel_idle driver based on that and clean up that
     driver somewhat (Rafael Wysocki).

   - Add an admin guide document for the intel_idle driver (Rafael
     Wysocki).

   - Clean up cpuidle core and drivers, enable compilation testing for
     some of them (Benjamin Gaignard, Krzysztof Kozlowski, Rafael
     Wysocki, Yangtao Li).

   - Fix reference counting of OPP (operating performance points) table
     structures (Viresh Kumar).

   - Add support for CPR (Core Power Reduction) to the AVS (Adaptive
     Voltage Scaling) subsystem (Niklas Cassel, Colin Ian King,
     YueHaibing).

   - Add support for TigerLake Mobile and JasperLake to the Intel RAPL
     power capping driver (Zhang Rui).

   - Update cpufreq drivers:
      - Add i.MX8MP support to imx-cpufreq-dt (Anson Huang).
      - Fix usage of a macro in loongson2_cpufreq (Alexandre Oliva).
      - Fix cpufreq policy reference counting issues in s3c and
        brcmstb-avs (chenqiwu).
      - Fix ACPI table reference counting issue and HiSilicon quirk
        handling in the CPPC driver (Hanjun Guo).
      - Clean up spelling mistake in intel_pstate (Harry Pan).
      - Convert the kirkwood and tegra186 drivers to using
        devm_platform_ioremap_resource() (Yangtao Li).

   - Update devfreq core:
      - Add 'name' sysfs attribute for devfreq devices (Chanwoo Choi).
      - Clean up the handing of transition statistics and allow them to
        be reset by writing 0 to the 'trans_stat' devfreq device
        attribute in sysfs (Kamil Konieczny).
      - Add 'devfreq_summary' to debugfs (Chanwoo Choi).
      - Clean up kerneldoc comments and Kconfig indentation (Krzysztof
        Kozlowski, Randy Dunlap).

   - Update devfreq drivers:
      - Add dynamic scaling for the imx8m DDR controller and clean up
        imx8m-ddrc (Leonard Crestez, YueHaibing).
      - Fix DT node reference counting and nitialization error code path
        in rk3399_dmc and add COMPILE_TEST and HAVE_ARM_SMCCC dependency
        for it (Chanwoo Choi, Yangtao Li).
      - Fix DT node reference counting in rockchip-dfi and make it use
        devm_platform_ioremap_resource() (Yangtao Li).
      - Fix excessive stack usage in exynos-ppmu (Arnd Bergmann).
      - Fix initialization error code paths in exynos-bus (Yangtao Li).
      - Clean up exynos-bus and exynos somewhat (Artur Świgoń, Krzysztof
        Kozlowski).

   - Add tracepoints for tracking usage_count updates unrelated to
     status changes in PM-runtime (Michał Mirosław).

   - Add sysfs attribute to control the "sync on suspend" behavior
     during system-wide suspend (Jonas Meurer).

   - Switch system-wide suspend tests over to 64-bit time (Alexandre
     Belloni).

   - Make wakeup sources statistics in debugfs cover deleted ones which
     used to be the case some time ago (zhuguangqing).

   - Clean up computations carried out during hibernation, update
     messages related to hibernation and fix a spelling mistake in one
     of them (Wen Yang, Luigi Semenzato, Colin Ian King).

   - Add mailmap entry for maintainer e-mail address that has not been
     functional for several years (Rafael Wysocki)"

* tag 'pm-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (83 commits)
  cpufreq: loongson2_cpufreq: adjust cpufreq uses of LOONGSON_CHIPCFG
  intel_idle: Clean up irtl_2_usec()
  intel_idle: Move 3 functions closer to their callers
  intel_idle: Annotate initialization code and data structures
  intel_idle: Move and clean up intel_idle_cpuidle_devices_uninit()
  intel_idle: Rearrange intel_idle_cpuidle_driver_init()
  intel_idle: Clean up NULL pointer check in intel_idle_init()
  intel_idle: Fold intel_idle_probe() into intel_idle_init()
  intel_idle: Eliminate __setup_broadcast_timer()
  cpuidle: fix cpuidle_find_deepest_state() kerneldoc warnings
  cpuidle: sysfs: fix warnings when compiling with W=1
  cpuidle: coupled: fix warnings when compiling with W=1
  cpufreq: brcmstb-avs: fix imbalance of cpufreq policy refcount
  PM: suspend: Add sysfs attribute to control the "sync on suspend" behavior
  PM / devfreq: Add debugfs support with devfreq_summary file
  Documentation: admin-guide: PM: Add intel_idle document
  cpuidle: arm: Enable compile testing for some of drivers
  PM-runtime: add tracepoints for usage_count changes
  cpufreq: intel_pstate: fix spelling mistake: "Whethet" -> "Whether"
  PM: hibernate: fix spelling mistake "shapshot" -> "snapshot"
  ...

1 files changed, 19 insertions, 10 deletions

diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index fb376b5b7281..c6f82d4bec9f 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -108,6 +108,20 @@ struct devfreq_dev_profile {
 };
 
 /**
+ * struct devfreq_stats - Statistics of devfreq device behavior
+ * @total_trans:	Number of devfreq transitions.
+ * @trans_table:	Statistics of devfreq transitions.
+ * @time_in_state:	Statistics of devfreq states.
+ * @last_update:	The last time stats were updated.
+ */
+struct devfreq_stats {
+	unsigned int total_trans;
+	unsigned int *trans_table;
+	u64 *time_in_state;
+	u64 last_update;
+};
+
+/**
  * struct devfreq - Device devfreq structure
  * @node:	list node - contains the devices with devfreq that have been
  *		registered.
@@ -122,6 +136,7 @@ struct devfreq_dev_profile {
  *		devfreq.nb to the corresponding register notifier call chain.
  * @work:	delayed work for load monitoring.
  * @previous_freq:	previously configured frequency value.
+ * @last_status:	devfreq user device info, performance statistics
  * @data:	Private data of the governor. The devfreq framework does not
  *		touch this.
  * @user_min_freq_req:	PM QoS minimum frequency request from user (via sysfs)
@@ -132,15 +147,12 @@ struct devfreq_dev_profile {
  * @suspend_freq:	 frequency of a device set during suspend phase.
  * @resume_freq:	 frequency of a device set in resume phase.
  * @suspend_count:	 suspend requests counter for a device.
- * @total_trans:	Number of devfreq transitions
- * @trans_table:	Statistics of devfreq transitions
- * @time_in_state:	Statistics of devfreq states
- * @last_stat_updated:	The last time stat updated
+ * @stats:	Statistics of devfreq device behavior
  * @transition_notifier_list: list head of DEVFREQ_TRANSITION_NOTIFIER notifier
  * @nb_min:		Notifier block for DEV_PM_QOS_MIN_FREQUENCY
  * @nb_max:		Notifier block for DEV_PM_QOS_MAX_FREQUENCY
  *
- * This structure stores the devfreq information for a give device.
+ * This structure stores the devfreq information for a given device.
  *
  * Note that when a governor accesses entries in struct devfreq in its
  * functions except for the context of callbacks defined in struct
@@ -174,11 +186,8 @@ struct devfreq {
 	unsigned long resume_freq;
 	atomic_t suspend_count;
 
-	/* information for device frequency transition */
-	unsigned int total_trans;
-	unsigned int *trans_table;
-	unsigned long *time_in_state;
-	unsigned long last_stat_updated;
+	/* information for device frequency transitions */
+	struct devfreq_stats stats;
 
 	struct srcu_notifier_head transition_notifier_list;