Merge tag 'pm-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These add support for new processors (Sierra Forest, Grand Ridge and
  Meteor Lake) to the intel_idle driver, make intel_pstate run on
  Emerald Rapids without HWP support and adjust it to utilize EPP values
  supplied by the platform firmware, fix issues, clean up code and
  improve documentation.

  The most significant fix addresses deadlocks in the core system-wide
  resume code that occur if async_schedule_dev() attempts to run its
  argument function synchronously (for example, due to a memory
  allocation failure). It rearranges the code in question which may
  increase the system resume time in some cases, but this basically is a
  removal of a premature optimization. That optimization will be added
  back later, but properly this time.

  Specifics:

   - Add support for the Sierra Forest, Grand Ridge and Meteorlake SoCs
     to the intel_idle cpuidle driver (Artem Bityutskiy, Zhang Rui)

   - Do not enable interrupts when entering idle in the haltpoll cpuidle
     driver (Borislav Petkov)

   - Add Emerald Rapids support in no-HWP mode to the intel_pstate
     cpufreq driver (Zhenguo Yao)

   - Use EPP values programmed by the platform firmware as balanced
     performance ones by default in intel_pstate (Srinivas Pandruvada)

   - Add a missing function return value check to the SCMI cpufreq
     driver to avoid unexpected behavior (Alexandra Diupina)

   - Fix parameter type warning in the armada-8k cpufreq driver (Gregory
     CLEMENT)

   - Rework trans_stat_show() in the devfreq core code to avoid buffer
     overflows (Christian Marangi)

   - Synchronize devfreq_monitor_[start/stop] so as to prevent a timer
     list corruption from occurring when devfreq governors are switched
     frequently (Mukesh Ojha)

   - Fix possible deadlocks in the core system-wide PM code that occur
     if device-handling functions cannot be executed asynchronously
     during resume from system-wide suspend (Rafael J. Wysocki)

   - Clean up unnecessary local variable initializations in multiple
     places in the hibernation code (Wang chaodong, Li zeming)

   - Adjust core hibernation code to avoid missing wakeup events that
     occur after saving an image to persistent storage (Chris Feng)

   - Update hibernation code to enforce correct ordering during image
     compression and decompression (Hongchen Zhang)

   - Use kmap_local_page() instead of kmap_atomic() in copy_data_page()
     during hibernation and restore (Chen Haonan)

   - Adjust documentation and code comments to reflect recent tasks
     freezer changes (Kevin Hao)

   - Repair excess function parameter description warning in the
     hibernation image-saving code (Randy Dunlap)

   - Fix _set_required_opps when opp is NULL (Bryan O'Donoghue)

   - Use device_get_match_data() in the OPP code for TI (Rob Herring)

   - Clean up OPP level and other parts and call dev_pm_opp_set_opp()
     recursively for required OPPs (Viresh Kumar)"

* tag 'pm-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (35 commits)
  OPP: Rename 'rate_clk_single'
  OPP: Pass rounded rate to _set_opp()
  OPP: Relocate dev_pm_opp_sync_regulators()
  PM: sleep: Fix possible deadlocks in core system-wide PM code
  OPP: Move dev_pm_opp_icc_bw to internal opp.h
  async: Introduce async_schedule_dev_nocall()
  async: Split async_schedule_node_domain()
  cpuidle: haltpoll: Do not enable interrupts when entering idle
  OPP: Fix _set_required_opps when opp is NULL
  OPP: The level field is always of unsigned int type
  PM: hibernate: Repair excess function parameter description warning
  PM: sleep: Remove obsolete comment from unlock_system_sleep()
  cpufreq: intel_pstate: Add Emerald Rapids support in no-HWP mode
  Documentation: PM: Adjust freezing-of-tasks.rst to the freezer changes
  PM: hibernate: Use kmap_local_page() in copy_data_page()
  intel_idle: add Sierra Forest SoC support
  intel_idle: add Grand Ridge SoC support
  PM / devfreq: Synchronize devfreq_monitor_[start/stop]
  cpufreq: armada-8k: Fix parameter type warning
  PM: hibernate: Enforce ordering during image compression/decompression
  ...

2 files changed, 13 insertions, 17 deletions

diff --git a/include/linux/async.h b/include/linux/async.h
index cce4ad31e8fc..33c9ff4afb49 100644
--- a/include/linux/async.h
+++ b/include/linux/async.h
@@ -90,6 +90,8 @@ async_schedule_dev(async_func_t func, struct device *dev)
 	return async_schedule_node(func, dev, dev_to_node(dev));
 }
 
+bool async_schedule_dev_nocall(async_func_t func, struct device *dev);
+
 /**
  * async_schedule_dev_domain - A device specific version of async_schedule_domain
  * @func: function to execute asynchronously
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index ccd97bcef269..76dcb7f37bcd 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -45,18 +45,6 @@ struct dev_pm_opp_supply {
 	unsigned long u_watt;
 };
 
-/**
- * struct dev_pm_opp_icc_bw - Interconnect bandwidth values
- * @avg:	Average bandwidth corresponding to this OPP (in icc units)
- * @peak:	Peak bandwidth corresponding to this OPP (in icc units)
- *
- * This structure stores the bandwidth values for a single interconnect path.
- */
-struct dev_pm_opp_icc_bw {
-	u32 avg;
-	u32 peak;
-};
-
 typedef int (*config_regulators_t)(struct device *dev,
 			struct dev_pm_opp *old_opp, struct dev_pm_opp *new_opp,
 			struct regulator **regulators, unsigned int count);
@@ -74,8 +62,10 @@ typedef int (*config_clks_t)(struct device *dev, struct opp_table *opp_table,
  * @supported_hw_count: Number of elements in the array.
  * @regulator_names: Array of pointers to the names of the regulator, NULL terminated.
  * @genpd_names: Null terminated array of pointers containing names of genpd to
- *		 attach.
- * @virt_devs: Pointer to return the array of virtual devices.
+ *		attach. Mutually exclusive with required_devs.
+ * @virt_devs: Pointer to return the array of genpd virtual devices. Mutually
+ *		exclusive with required_devs.
+ * @required_devs: Required OPP devices. Mutually exclusive with genpd_names/virt_devs.
  *
  * This structure contains platform specific OPP configurations for the device.
  */
@@ -90,11 +80,15 @@ struct dev_pm_opp_config {
 	const char * const *regulator_names;
 	const char * const *genpd_names;
 	struct device ***virt_devs;
+	struct device **required_devs;
 };
 
+#define OPP_LEVEL_UNSET			U32_MAX
+
 /**
  * struct dev_pm_opp_data - The data to use to initialize an OPP.
- * @level: The performance level for the OPP.
+ * @level: The performance level for the OPP. Set level to OPP_LEVEL_UNSET if
+ * level field isn't used.
  * @freq: The clock rate in Hz for the OPP.
  * @u_volt: The voltage in uV for the OPP.
  */
@@ -157,7 +151,7 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
 					      unsigned int *level);
 
 struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
-					       unsigned long *level);
+					       unsigned int *level);
 
 struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
 					   unsigned int *bw, int index);
@@ -324,7 +318,7 @@ static inline struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
 }
 
 static inline struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
-							     unsigned long *level)
+							     unsigned int *level)
 {
 	return ERR_PTR(-EOPNOTSUPP);
 }