Merge tag 'pm-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These add sysadmin documentation for cpuidle, extend the cpuidle
  subsystem somewhat, improve the handling of performance states in the
  generic power domains (genpd) and operating performance points (OPP)
  frameworks, add a new cpufreq driver for Qualcomm SoCs, update some
  other cpufreq drivers, switch over the runtime PM framework to using
  high-res timers for device autosuspend, fix a problem with
  suspend-to-idle on ACPI-based platforms, add system-wide suspend and
  resume handling to the devfreq framework, do some janitorial cleanups
  all over and update some utilities.

  Specifics:

   - Add sysadmin documentation for cpuidle (Rafael Wysocki).

   - Make it possible to specify a cpuidle governor from kernel command
     line, add new cpuidle state sysfs attributes for governor
     evaluation, and improve the "polling" idle state handling (Rafael
     Wysocki).

   - Fix the handling of the "required-opps" DT property in the
     operating performance points (OPP) framework, improve the
     integration of it with the generic power domains (genpd) framework,
     improve the handling of performance states in them and clean up the
     idle states vs performance states separation in genpd (Viresh
     Kumar, Ulf Hansson).

   - Add a cpufreq driver called "qcom-hw" for Qualcomm SoCs using a
     hardware engine to control CPU frequency transitions along with DT
     bindings for it (Taniya Das).

   - Fix an intel_pstate driver issue related to CPU offline and update
     the documentation of it (Srinivas Pandruvada).

   - Clean up the imx6q cpufreq driver (Anson Huang).

   - Add SPDX license IDs to cpufreq schedutil governor files (Daniel
     Lezcano).

   - Switch over the runtime PM framework to using high-res timers for
     device autosuspend to allow the control of it to be more precise
     (Vincent Guittot).

   - Disable non-wakeup ACPI GPEs during suspend-to-idle so that they
     don't prevent the system from reaching the target low-power state
     and simplify the suspend-to-idle handling on ACPI platforms without
     full Low-Power S0 Idle (LPS0) support (Rafael Wysocki).

   - Add system-wide suspend and resume support to the devfreq framework
     (Lukasz Luba).

   - Clean up the SmartReflex adaptive voltage scaling (AVS) driver and
     add an SPDX license ID to it (Nishanth Menon, Uwe Kleine-König,
     Thomas Meyer).

   - Get rid of code duplication by using the DEFINE_SHOW_ATTRIBUTE
     macro in some places, fix some DT node refcount leaks, and do some
     other janitorial cleanups (Yangtao Li).

   - Update the cpupower, intel_pstate_tracer and turbosat utilities
     (Abhishek Goel, Doug Smythies, Len Brown)"

* tag 'pm-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (54 commits)
  PM / Domains: remove define_genpd_open_function() and define_genpd_debugfs_fops()
  PM-runtime: Switch autosuspend over to using hrtimers
  cpufreq: qcom-hw: Add support for QCOM cpufreq HW driver
  dt-bindings: cpufreq: Introduce QCOM cpufreq firmware bindings
  ACPI: PM: Loop in full LPS0 mode only
  ACPI: EC / PM: Disable non-wakeup GPEs for suspend-to-idle
  tools/power/x86/intel_pstate_tracer: Fix non root execution for post processing a trace file
  tools/power turbostat: consolidate duplicate model numbers
  tools/power turbostat: fix goldmont C-state limit decoding
  PM / Domains: Propagate performance state updates
  PM / Domains: Factorize dev_pm_genpd_set_performance_state()
  PM / Domains: Save OPP table pointer in genpd
  OPP: Don't return 0 on error from of_get_required_opp_performance_state()
  OPP: Add dev_pm_opp_xlate_performance_state() helper
  OPP: Improve _find_table_of_opp_np()
  PM / Domains: Make genpd performance states orthogonal to the idlestates
  PM / sleep: convert to DEFINE_SHOW_ATTRIBUTE
  cpuidle: Add 'above' and 'below' idle state metrics
  PM / AVS: SmartReflex: Switch to SPDX Licence ID
  PM / AVS: SmartReflex: NULL check before some freeing functions is not needed
  ...

7 files changed, 51 insertions, 22 deletions

diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index faed7a8977e8..4dff74f48d4b 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -33,6 +33,8 @@ struct cpuidle_state_usage {
 	unsigned long long	disable;
 	unsigned long long	usage;
 	unsigned long long	time; /* in US */
+	unsigned long long	above; /* Number of times it's been too deep */
+	unsigned long long	below; /* Number of times it's been too shallow */
 #ifdef CONFIG_SUSPEND
 	unsigned long long	s2idle_usage;
 	unsigned long long	s2idle_time; /* in US */
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index e4963b0f45da..fbffa74bfc1b 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -131,6 +131,9 @@ struct devfreq_dev_profile {
  * @scaling_min_freq:	Limit minimum frequency requested by OPP interface
  * @scaling_max_freq:	Limit maximum frequency requested by OPP interface
  * @stop_polling:	 devfreq polling status of a device.
+ * @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
@@ -167,6 +170,10 @@ struct devfreq {
 	unsigned long scaling_max_freq;
 	bool stop_polling;
 
+	unsigned long suspend_freq;
+	unsigned long resume_freq;
+	atomic_t suspend_count;
+
 	/* information for device frequency transition */
 	unsigned int total_trans;
 	unsigned int *trans_table;
@@ -198,6 +205,9 @@ extern void devm_devfreq_remove_device(struct device *dev,
 extern int devfreq_suspend_device(struct devfreq *devfreq);
 extern int devfreq_resume_device(struct devfreq *devfreq);
 
+extern void devfreq_suspend(void);
+extern void devfreq_resume(void);
+
 /**
  * update_devfreq() - Reevaluate the device and configure frequency
  * @devfreq:	the devfreq device
@@ -324,6 +334,9 @@ static inline int devfreq_resume_device(struct devfreq *devfreq)
 	return 0;
 }
 
+static inline void devfreq_suspend(void) {}
+static inline void devfreq_resume(void) {}
+
 static inline struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
 					   unsigned long *freq, u32 flags)
 {
diff --git a/include/linux/pm.h b/include/linux/pm.h
index e723b78d8357..0bd9de116826 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -26,6 +26,7 @@
 #include <linux/spinlock.h>
 #include <linux/wait.h>
 #include <linux/timer.h>
+#include <linux/hrtimer.h>
 #include <linux/completion.h>
 
 /*
@@ -608,7 +609,7 @@ struct dev_pm_info {
 	unsigned int		should_wakeup:1;
 #endif
 #ifdef CONFIG_PM
-	struct timer_list	suspend_timer;
+	struct hrtimer		suspend_timer;
 	unsigned long		timer_expires;
 	struct work_struct	work;
 	wait_queue_head_t	wait_queue;
@@ -631,7 +632,7 @@ struct dev_pm_info {
 	enum rpm_status		runtime_status;
 	int			runtime_error;
 	int			autosuspend_delay;
-	unsigned long		last_busy;
+	u64			last_busy;
 	unsigned long		active_jiffies;
 	unsigned long		suspended_jiffies;
 	unsigned long		accounting_timestamp;
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 3b5d7280e52e..dd364abb649a 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -73,6 +73,7 @@ struct genpd_power_state {
 
 struct genpd_lock_ops;
 struct dev_pm_opp;
+struct opp_table;
 
 struct generic_pm_domain {
 	struct device dev;
@@ -94,6 +95,7 @@ struct generic_pm_domain {
 	unsigned int performance_state;	/* Aggregated max performance state */
 	int (*power_off)(struct generic_pm_domain *domain);
 	int (*power_on)(struct generic_pm_domain *domain);
+	struct opp_table *opp_table;	/* OPP table of the genpd */
 	unsigned int (*opp_to_performance_state)(struct generic_pm_domain *genpd,
 						 struct dev_pm_opp *opp);
 	int (*set_performance_state)(struct generic_pm_domain *genpd,
@@ -134,6 +136,10 @@ struct gpd_link {
 	struct list_head master_node;
 	struct generic_pm_domain *slave;
 	struct list_head slave_node;
+
+	/* Sub-domain's per-master domain performance state */
+	unsigned int performance_state;
+	unsigned int prev_performance_state;
 };
 
 struct gpd_timing_data {
@@ -258,8 +264,8 @@ int of_genpd_add_subdomain(struct of_phandle_args *parent,
 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
 int of_genpd_parse_idle_states(struct device_node *dn,
 			       struct genpd_power_state **states, int *n);
-unsigned int of_genpd_opp_to_performance_state(struct device *dev,
-				struct device_node *np);
+unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev,
+					       struct dev_pm_opp *opp);
 
 int genpd_dev_pm_attach(struct device *dev);
 struct device *genpd_dev_pm_attach_by_id(struct device *dev,
@@ -300,8 +306,8 @@ static inline int of_genpd_parse_idle_states(struct device_node *dn,
 }
 
 static inline unsigned int
-of_genpd_opp_to_performance_state(struct device *dev,
-				  struct device_node *np)
+pm_genpd_opp_to_performance_state(struct device *genpd_dev,
+				  struct dev_pm_opp *opp)
 {
 	return 0;
 }
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 5d399eeef172..0a2a88e5a383 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -126,6 +126,9 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name);
 void dev_pm_opp_put_clkname(struct opp_table *opp_table);
 struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
 void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table);
+struct opp_table *dev_pm_opp_set_genpd_virt_dev(struct device *dev, struct device *virt_dev, int index);
+void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, struct device *virt_dev);
+int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
 int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
 int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
 int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
@@ -272,6 +275,18 @@ static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const
 
 static inline void dev_pm_opp_put_clkname(struct opp_table *opp_table) {}
 
+static inline struct opp_table *dev_pm_opp_set_genpd_virt_dev(struct device *dev, struct device *virt_dev, int index)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, struct device *virt_dev) {}
+
+static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate)
+{
+	return -ENOTSUPP;
+}
+
 static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 {
 	return -ENOTSUPP;
@@ -305,8 +320,8 @@ int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
 void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
 struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
-struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *dev, struct device_node *np);
 struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
+int of_get_required_opp_performance_state(struct device_node *np, int index);
 #else
 static inline int dev_pm_opp_of_add_table(struct device *dev)
 {
@@ -341,13 +356,13 @@ static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device
 	return NULL;
 }
 
-static inline struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *dev, struct device_node *np)
+static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
 {
 	return NULL;
 }
-static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
+static inline int of_get_required_opp_performance_state(struct device_node *np, int index)
 {
-	return NULL;
+	return -ENOTSUPP;
 }
 #endif
 
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index f0fc4700b6ff..54af4eef169f 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -51,7 +51,7 @@ extern void pm_runtime_no_callbacks(struct device *dev);
 extern void pm_runtime_irq_safe(struct device *dev);
 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
-extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
+extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
 extern void pm_runtime_update_max_time_suspended(struct device *dev,
 						 s64 delta_ns);
 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
@@ -105,7 +105,7 @@ static inline bool pm_runtime_callbacks_present(struct device *dev)
 
 static inline void pm_runtime_mark_last_busy(struct device *dev)
 {
-	WRITE_ONCE(dev->power.last_busy, jiffies);
+	WRITE_ONCE(dev->power.last_busy, ktime_to_ns(ktime_get()));
 }
 
 static inline bool pm_runtime_is_irq_safe(struct device *dev)
@@ -168,7 +168,7 @@ static inline void __pm_runtime_use_autosuspend(struct device *dev,
 						bool use) {}
 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
 						int delay) {}
-static inline unsigned long pm_runtime_autosuspend_expiration(
+static inline u64 pm_runtime_autosuspend_expiration(
 				struct device *dev) { return 0; }
 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
 						bool enable){}
diff --git a/include/linux/power/smartreflex.h b/include/linux/power/smartreflex.h
index 7b81dad712de..d0b37e937037 100644
--- a/include/linux/power/smartreflex.h
+++ b/include/linux/power/smartreflex.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * OMAP Smartreflex Defines and Routines
  *
@@ -11,10 +12,6 @@
  *
  * Copyright (C) 2007 Texas Instruments, Inc.
  * Lesly A M <x0080970@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #ifndef __POWER_SMARTREFLEX_H
@@ -303,9 +300,6 @@ void omap_sr_enable(struct voltagedomain *voltdm);
 void omap_sr_disable(struct voltagedomain *voltdm);
 void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
 
-/* API to register the pmic specific data with the smartreflex driver. */
-void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
-
 /* Smartreflex driver hooks to be called from Smartreflex class driver */
 int sr_enable(struct omap_sr *sr, unsigned long volt);
 void sr_disable(struct omap_sr *sr);
@@ -320,7 +314,5 @@ static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
 static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
 static inline void omap_sr_disable_reset_volt(
 		struct voltagedomain *voltdm) {}
-static inline void omap_sr_register_pmic(
-		struct omap_sr_pmic_data *pmic_data) {}
 #endif
 #endif