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
  ...

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -145,6 +145,8 @@ What:		/sys/devices/system/cpu/cpuX/cpuidle/stateN/name
 		/sys/devices/system/cpu/cpuX/cpuidle/stateN/power
 		/sys/devices/system/cpu/cpuX/cpuidle/stateN/time
 		/sys/devices/system/cpu/cpuX/cpuidle/stateN/usage
+		/sys/devices/system/cpu/cpuX/cpuidle/stateN/above
+		/sys/devices/system/cpu/cpuX/cpuidle/stateN/below
 Date:		September 2007
 KernelVersion:	v2.6.24
 Contact:	Linux power management list <linux-pm@vger.kernel.org>
@@ -166,6 +168,11 @@ Description:
 
 		usage: (RO) Number of times this state was entered (a count).
 
+		above: (RO) Number of times this state was entered, but the
+		       observed CPU idle duration was too short for it (a count).
+
+		below: (RO) Number of times this state was entered, but the
+		       observed CPU idle duration was too long for it (a count).
 
 What:		/sys/devices/system/cpu/cpuX/cpuidle/stateN/desc
 Date:		February 2008

Documentation/admin-guide/kernel-parameters.txt

@@ -674,6 +674,9 @@
 	cpuidle.off=1	[CPU_IDLE]
 			disable the cpuidle sub-system
 
+	cpuidle.governor=
+			[CPU_IDLE] Name of the cpuidle governor to use.
+
 	cpufreq.off=1	[CPU_FREQ]
 			disable the cpufreq sub-system
 

Documentation/admin-guide/pm/intel_pstate.rst

@@ -495,7 +495,15 @@ on the following rules, regardless of the current operation mode of the driver:
 
  2. Each individual CPU is affected by its own per-policy limits (that is, it
     cannot be requested to run faster than its own per-policy maximum and it
-    cannot be requested to run slower than its own per-policy minimum).
+    cannot be requested to run slower than its own per-policy minimum). The
+    effective performance depends on whether the platform supports per core
+    P-states, hyper-threading is enabled and on current performance requests
+    from other CPUs. When platform doesn't support per core P-states, the
+    effective performance can be more than the policy limits set on a CPU, if
+    other CPUs are requesting higher performance at that moment. Even with per
+    core P-states support, when hyper-threading is enabled, if the sibling CPU
+    is requesting higher performance, the other siblings will get higher
+    performance than their policy limits.
 
  3. The global and per-policy limits can be set independently.
 

Documentation/admin-guide/pm/working-state.rst

@@ -5,5 +5,6 @@ Working-State Power Management
 .. toctree::
    :maxdepth: 2
 
+   cpuidle
    cpufreq
    intel_pstate

Documentation/cpuidle/core.txt

-
-		Supporting multiple CPU idle levels in kernel
-
-				cpuidle
-
-General Information:
-
-Various CPUs today support multiple idle levels that are differentiated
-by varying exit latencies and power consumption during idle.
-cpuidle is a generic in-kernel infrastructure that separates
-idle policy (governor) from idle mechanism (driver) and provides a
-standardized infrastructure to support independent development of
-governors and drivers.
-
-cpuidle resides under drivers/cpuidle.
-
-Boot options:
-"cpuidle_sysfs_switch"
-enables current_governor interface in /sys/devices/system/cpu/cpuidle/,
-which can be used to switch governors at run time. This boot option
-is meant for developer testing only. In normal usage, kernel picks the
-best governor based on governor ratings.
-SEE ALSO: sysfs.txt in this directory.

Documentation/cpuidle/sysfs.txt

-
-
-		Supporting multiple CPU idle levels in kernel
-
-				cpuidle sysfs
-
-System global cpuidle related information and tunables are under
-/sys/devices/system/cpu/cpuidle
-
-The current interfaces in this directory has self-explanatory names:
-* current_driver
-* current_governor_ro
-
-With cpuidle_sysfs_switch boot option (meant for developer testing)
-following objects are visible instead.
-* current_driver
-* available_governors
-* current_governor
-In this case users can switch the governor at run time by writing
-to current_governor.
-
-
-Per logical CPU specific cpuidle information are under
-/sys/devices/system/cpu/cpuX/cpuidle
-for each online cpu X
-
---------------------------------------------------------------------------------
-# ls -lR /sys/devices/system/cpu/cpu0/cpuidle/
-/sys/devices/system/cpu/cpu0/cpuidle/:
-total 0
-drwxr-xr-x 2 root root 0 Feb  8 10:42 state0
-drwxr-xr-x 2 root root 0 Feb  8 10:42 state1
-drwxr-xr-x 2 root root 0 Feb  8 10:42 state2
-drwxr-xr-x 2 root root 0 Feb  8 10:42 state3
-
-/sys/devices/system/cpu/cpu0/cpuidle/state0:
-total 0
--r--r--r-- 1 root root 4096 Feb  8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb  8 10:42 disable
--r--r--r-- 1 root root 4096 Feb  8 10:42 latency
--r--r--r-- 1 root root 4096 Feb  8 10:42 name
--r--r--r-- 1 root root 4096 Feb  8 10:42 power
--r--r--r-- 1 root root 4096 Feb  8 10:42 residency
--r--r--r-- 1 root root 4096 Feb  8 10:42 time
--r--r--r-- 1 root root 4096 Feb  8 10:42 usage
-
-/sys/devices/system/cpu/cpu0/cpuidle/state1:
-total 0
--r--r--r-- 1 root root 4096 Feb  8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb  8 10:42 disable
--r--r--r-- 1 root root 4096 Feb  8 10:42 latency
--r--r--r-- 1 root root 4096 Feb  8 10:42 name
--r--r--r-- 1 root root 4096 Feb  8 10:42 power
--r--r--r-- 1 root root 4096 Feb  8 10:42 residency
--r--r--r-- 1 root root 4096 Feb  8 10:42 time
--r--r--r-- 1 root root 4096 Feb  8 10:42 usage
-
-/sys/devices/system/cpu/cpu0/cpuidle/state2:
-total 0
--r--r--r-- 1 root root 4096 Feb  8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb  8 10:42 disable
--r--r--r-- 1 root root 4096 Feb  8 10:42 latency
--r--r--r-- 1 root root 4096 Feb  8 10:42 name
--r--r--r-- 1 root root 4096 Feb  8 10:42 power
--r--r--r-- 1 root root 4096 Feb  8 10:42 residency
--r--r--r-- 1 root root 4096 Feb  8 10:42 time
--r--r--r-- 1 root root 4096 Feb  8 10:42 usage
-
-/sys/devices/system/cpu/cpu0/cpuidle/state3:
-total 0
--r--r--r-- 1 root root 4096 Feb  8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb  8 10:42 disable
--r--r--r-- 1 root root 4096 Feb  8 10:42 latency
--r--r--r-- 1 root root 4096 Feb  8 10:42 name
--r--r--r-- 1 root root 4096 Feb  8 10:42 power
--r--r--r-- 1 root root 4096 Feb  8 10:42 residency
--r--r--r-- 1 root root 4096 Feb  8 10:42 time
--r--r--r-- 1 root root 4096 Feb  8 10:42 usage
---------------------------------------------------------------------------------
-
-
-* desc : Small description about the idle state (string)
-* disable : Option to disable this idle state (bool) -> see note below
-* latency : Latency to exit out of this idle state (in microseconds)
-* residency : Time after which a state becomes more effecient than any
-  shallower state (in microseconds)
-* name : Name of the idle state (string)
-* power : Power consumed while in this idle state (in milliwatts)
-* time : Total time spent in this idle state (in microseconds)
-* usage : Number of times this state was entered (count)
-
-Note:
-The behavior and the effect of the disable variable depends on the
-implementation of a particular governor. In the ladder governor, for
-example, it is not coherent, i.e. if one is disabling a light state,
-then all deeper states are disabled as well, but the disable variable
-does not reflect it. Likewise, if one enables a deep state but a lighter
-state still is disabled, then this has no effect.

Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt

+Qualcomm Technologies, Inc. CPUFREQ Bindings
+
+CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
+SoCs to manage frequency in hardware. It is capable of controlling frequency
+for multiple clusters.
+
+Properties:
+- compatible
+	Usage:		required
+	Value type:	<string>
+	Definition:	must be "qcom,cpufreq-hw".
+
+- clocks
+	Usage:		required
+	Value type:	<phandle> From common clock binding.
+	Definition:	clock handle for XO clock and GPLL0 clock.
+
+- clock-names
+	Usage:		required
+	Value type:	<string> From common clock binding.
+	Definition:	must be "xo", "alternate".
+
+- reg
+	Usage:		required
+	Value type:	<prop-encoded-array>
+	Definition:	Addresses and sizes for the memory of the HW bases in
+			each frequency domain.
+- reg-names
+	Usage:		Optional
+	Value type:	<string>
+	Definition:	Frequency domain name i.e.
+			"freq-domain0", "freq-domain1".
+
+- #freq-domain-cells:
+	Usage:		required.
+	Definition:	Number of cells in a freqency domain specifier.
+
+* Property qcom,freq-domain
+Devices supporting freq-domain must set their "qcom,freq-domain" property with
+phandle to a cpufreq_hw followed by the Domain ID(0/1) in the CPU DT node.
+
+
+Example:
+
+Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster switch
+DCVS state together.
+
+/ {
+	cpus {
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		CPU0: cpu@0 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x0>;
+			enable-method = "psci";
+			next-level-cache = <&L2_0>;
+			qcom,freq-domain = <&cpufreq_hw 0>;
+			L2_0: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+				L3_0: l3-cache {
+				      compatible = "cache";
+				};
+			};
+		};
+
+		CPU1: cpu@100 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x100>;
+			enable-method = "psci";
+			next-level-cache = <&L2_100>;
+			qcom,freq-domain = <&cpufreq_hw 0>;
+			L2_100: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+
+		CPU2: cpu@200 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x200>;
+			enable-method = "psci";
+			next-level-cache = <&L2_200>;
+			qcom,freq-domain = <&cpufreq_hw 0>;
+			L2_200: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+
+		CPU3: cpu@300 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x300>;
+			enable-method = "psci";
+			next-level-cache = <&L2_300>;
+			qcom,freq-domain = <&cpufreq_hw 0>;
+			L2_300: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+
+		CPU4: cpu@400 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x400>;
+			enable-method = "psci";
+			next-level-cache = <&L2_400>;
+			qcom,freq-domain = <&cpufreq_hw 1>;
+			L2_400: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+
+		CPU5: cpu@500 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x500>;
+			enable-method = "psci";
+			next-level-cache = <&L2_500>;
+			qcom,freq-domain = <&cpufreq_hw 1>;
+			L2_500: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+
+		CPU6: cpu@600 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x600>;
+			enable-method = "psci";
+			next-level-cache = <&L2_600>;
+			qcom,freq-domain = <&cpufreq_hw 1>;
+			L2_600: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+
+		CPU7: cpu@700 {
+			device_type = "cpu";
+			compatible = "qcom,kryo385";
+			reg = <0x0 0x700>;
+			enable-method = "psci";
+			next-level-cache = <&L2_700>;
+			qcom,freq-domain = <&cpufreq_hw 1>;
+			L2_700: l2-cache {
+				compatible = "cache";
+				next-level-cache = <&L3_0>;
+			};
+		};
+	};
+
+ soc {
+	cpufreq_hw: cpufreq@17d43000 {
+		compatible = "qcom,cpufreq-hw";
+		reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
+		reg-names = "freq-domain0", "freq-domain1";
+
+		clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
+		clock-names = "xo", "alternate";
+
+		#freq-domain-cells = <1>;
+	};
+}

drivers/acpi/ec.c

@@ -1034,6 +1034,18 @@ void acpi_ec_unblock_transactions(void)
 		acpi_ec_start(first_ec, true);
 }
 
+void acpi_ec_mark_gpe_for_wake(void)
+{
+	if (first_ec && !ec_no_wakeup)
+		acpi_mark_gpe_for_wake(NULL, first_ec->gpe);
+}
+
+void acpi_ec_set_gpe_wake_mask(u8 action)
+{
+	if (first_ec && !ec_no_wakeup)
+		acpi_set_gpe_wake_mask(NULL, first_ec->gpe, action);
+}
+
 void acpi_ec_dispatch_gpe(void)
 {
 	if (first_ec)

drivers/acpi/internal.h

@@ -188,6 +188,8 @@ int acpi_ec_ecdt_probe(void);
 int acpi_ec_dsdt_probe(void);
 void acpi_ec_block_transactions(void);
 void acpi_ec_unblock_transactions(void);
+void acpi_ec_mark_gpe_for_wake(void);
+void acpi_ec_set_gpe_wake_mask(u8 action);
 void acpi_ec_dispatch_gpe(void);
 int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
 			      acpi_handle handle, acpi_ec_query_func func,

drivers/acpi/sleep.c

@@ -940,6 +940,8 @@ static int lps0_device_attach(struct acpi_device *adev,
 
 		acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
 				  bitmask);
+
+		acpi_ec_mark_gpe_for_wake();
 	} else {
 		acpi_handle_debug(adev->handle,
 				  "_DSM function 0 evaluation failed\n");
@@ -968,16 +970,23 @@ static int acpi_s2idle_prepare(void)
 	if (lps0_device_handle) {
 		acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
 		acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
+
+		acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE);
 	}
 
 	if (acpi_sci_irq_valid())
 		enable_irq_wake(acpi_sci_irq);
 
+	/* Change the configuration of GPEs to avoid spurious wakeup. */
+	acpi_enable_all_wakeup_gpes();
+	acpi_os_wait_events_complete();
 	return 0;
 }
 
 static void acpi_s2idle_wake(void)
 {
+	if (!lps0_device_handle)
+		return;
 
 	if (pm_debug_messages_on)
 		lpi_check_constraints();
@@ -996,7 +1005,6 @@ static void acpi_s2idle_wake(void)
 		 * takes too much time for EC wakeup events to survive, so look
 		 * for them now.
 		 */
-		if (lps0_device_handle)
 		acpi_ec_dispatch_gpe();
 	}
 }
@@ -1017,10 +1025,14 @@ static void acpi_s2idle_sync(void)
 
 static void acpi_s2idle_restore(void)
 {
+	acpi_enable_all_runtime_gpes();
+
 	if (acpi_sci_irq_valid())
 		disable_irq_wake(acpi_sci_irq);
 
 	if (lps0_device_handle) {
+		acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
+
 		acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
 		acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
 	}

drivers/base/power/runtime.c

@@ -8,6 +8,8 @@
  */
 
 #include <linux/sched/mm.h>
+#include <linux/ktime.h>
+#include <linux/hrtimer.h>
 #include <linux/export.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_wakeirq.h>
@@ -93,7 +95,7 @@ static void __update_runtime_status(struct device *dev, enum rpm_status status)
 static void pm_runtime_deactivate_timer(struct device *dev)
 {
 	if (dev->power.timer_expires > 0) {
-		del_timer(&dev->power.suspend_timer);
+		hrtimer_cancel(&dev->power.suspend_timer);
 		dev->power.timer_expires = 0;
 	}
 }
@@ -124,12 +126,11 @@ static void pm_runtime_cancel_pending(struct device *dev)
  * This function may be called either with or without dev->power.lock held.
  * Either way it can be racy, since power.last_busy may be updated at any time.
  */
-unsigned long pm_runtime_autosuspend_expiration(struct device *dev)
+u64 pm_runtime_autosuspend_expiration(struct device *dev)
 {
 	int autosuspend_delay;
-	long elapsed;
-	unsigned long last_busy;
-	unsigned long expires = 0;
+	u64 last_busy, expires = 0;
+	u64 now = ktime_to_ns(ktime_get());
 
 	if (!dev->power.use_autosuspend)
 		goto out;
@@ -139,19 +140,9 @@ unsigned long pm_runtime_autosuspend_expiration(struct device *dev)
 		goto out;
 
 	last_busy = READ_ONCE(dev->power.last_busy);
-	elapsed = jiffies - last_busy;
-	if (elapsed < 0)
-		goto out;	/* jiffies has wrapped around. */
 
-	/*
-	 * If the autosuspend_delay is >= 1 second, align the timer by rounding
-	 * up to the nearest second.
-	 */
-	expires = last_busy + msecs_to_jiffies(autosuspend_delay);
-	if (autosuspend_delay >= 1000)
-		expires = round_jiffies(expires);
-	expires += !expires;
-	if (elapsed >= expires - last_busy)
+	expires = last_busy + autosuspend_delay * NSEC_PER_MSEC;
+	if (expires <= now)
 		expires = 0;	/* Already expired. */
 
  out:
@@ -515,7 +506,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
 	/* If the autosuspend_delay time hasn't expired yet, reschedule. */
 	if ((rpmflags & RPM_AUTO)
 	    && dev->power.runtime_status != RPM_SUSPENDING) {
-		unsigned long expires = pm_runtime_autosuspend_expiration(dev);
+		u64 expires = pm_runtime_autosuspend_expiration(dev);
 
 		if (expires != 0) {
 			/* Pending requests need to be canceled. */
@@ -528,10 +519,20 @@ static int rpm_suspend(struct device *dev, int rpmflags)
 			 * expire; pm_suspend_timer_fn() will take care of the
 			 * rest.
 			 */
-			if (!(dev->power.timer_expires && time_before_eq(
-			    dev->power.timer_expires, expires))) {
+			if (!(dev->power.timer_expires &&
+					dev->power.timer_expires <= expires)) {
+				/*
+				 * We add a slack of 25% to gather wakeups
+				 * without sacrificing the granularity.
+				 */
+				u64 slack = READ_ONCE(dev->power.autosuspend_delay) *
+						    (NSEC_PER_MSEC >> 2);
+
 				dev->power.timer_expires = expires;
-				mod_timer(&dev->power.suspend_timer, expires);
+				hrtimer_start_range_ns(&dev->power.suspend_timer,
+						ns_to_ktime(expires),
+						slack,
+						HRTIMER_MODE_ABS);
 			}
 			dev->power.timer_autosuspends = 1;
 			goto out;
@@ -895,23 +896,25 @@ static void pm_runtime_work(struct work_struct *work)
  *
  * Check if the time is right and queue a suspend request.
  */
-static void pm_suspend_timer_fn(struct timer_list *t)
+static enum hrtimer_restart  pm_suspend_timer_fn(struct hrtimer *timer)
 {
-	struct device *dev = from_timer(dev, t, power.suspend_timer);
+	struct device *dev = container_of(timer, struct device, power.suspend_timer);
 	unsigned long flags;
-	unsigned long expires;
+	u64 expires;
 
 	spin_lock_irqsave(&dev->power.lock, flags);
 
 	expires = dev->power.timer_expires;
 	/* If 'expire' is after 'jiffies' we've been called too early. */
-	if (expires > 0 && !time_after(expires, jiffies)) {
+	if (expires > 0 && expires < ktime_to_ns(ktime_get())) {
 		dev->power.timer_expires = 0;
 		rpm_suspend(dev, dev->power.timer_autosuspends ?
 		    (RPM_ASYNC | RPM_AUTO) : RPM_ASYNC);
 	}
 
 	spin_unlock_irqrestore(&dev->power.lock, flags);
+
+	return HRTIMER_NORESTART;
 }
 
 /**
@@ -922,6 +925,7 @@ static void pm_suspend_timer_fn(struct timer_list *t)
 int pm_schedule_suspend(struct device *dev, unsigned int delay)
 {
 	unsigned long flags;
+	ktime_t expires;
 	int retval;
 
 	spin_lock_irqsave(&dev->power.lock, flags);
@@ -938,10 +942,10 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
 	/* Other scheduled or pending requests need to be canceled. */
 	pm_runtime_cancel_pending(dev);
 
-	dev->power.timer_expires = jiffies + msecs_to_jiffies(delay);
-	dev->power.timer_expires += !dev->power.timer_expires;
+	expires = ktime_add(ktime_get(), ms_to_ktime(delay));
+	dev->power.timer_expires = ktime_to_ns(expires);
 	dev->power.timer_autosuspends = 0;
-	mod_timer(&dev->power.suspend_timer, dev->power.timer_expires);
+	hrtimer_start(&dev->power.suspend_timer, expires, HRTIMER_MODE_ABS);
 
  out:
 	spin_unlock_irqrestore(&dev->power.lock, flags);
@@ -1491,7 +1495,8 @@ void pm_runtime_init(struct device *dev)
 	INIT_WORK(&dev->power.work, pm_runtime_work);
 
 	dev->power.timer_expires = 0;
-	timer_setup(&dev->power.suspend_timer, pm_suspend_timer_fn, 0);
+	hrtimer_init(&dev->power.suspend_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+	dev->power.suspend_timer.function = pm_suspend_timer_fn;
 
 	init_waitqueue_head(&dev->power.wait_queue);
 }

drivers/cpufreq/Kconfig.arm

@@ -114,6 +114,17 @@ config ARM_QCOM_CPUFREQ_KRYO
 
 	  If in doubt, say N.
 
+config ARM_QCOM_CPUFREQ_HW
+	tristate "QCOM CPUFreq HW driver"
+	depends on ARCH_QCOM || COMPILE_TEST
+	help
+	  Support for the CPUFreq HW driver.
+	  Some QCOM chipsets have a HW engine to offload the steps
+	  necessary for changing the frequency of the CPUs. Firmware loaded
+	  in this engine exposes a programming interface to the OS.
+	  The driver implements the cpufreq interface for this HW engine.
+	  Say Y if you want to support CPUFreq HW.
+
 config ARM_S3C_CPUFREQ
 	bool
 	help

drivers/cpufreq/Makefile

@@ -61,6 +61,7 @@ obj-$(CONFIG_MACH_MVEBU_V7)		+= mvebu-cpufreq.o
 obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ)	+= omap-cpufreq.o
 obj-$(CONFIG_ARM_PXA2xx_CPUFREQ)	+= pxa2xx-cpufreq.o
 obj-$(CONFIG_PXA3xx)			+= pxa3xx-cpufreq.o
+obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW)	+= qcom-cpufreq-hw.o
 obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO)	+= qcom-cpufreq-kryo.o
 obj-$(CONFIG_ARM_S3C2410_CPUFREQ)	+= s3c2410-cpufreq.o
 obj-$(CONFIG_ARM_S3C2412_CPUFREQ)	+= s3c2412-cpufreq.o

drivers/cpufreq/cpufreq-nforce2.c

@@ -123,8 +123,6 @@ static void nforce2_write_pll(int pll)
 	/* Now write the value in all 64 registers */
 	for (temp = 0; temp <= 0x3f; temp++)
 		pci_write_config_dword(nforce2_dev, NFORCE2_PLLREG, pll);
-
-	return;
 }
 
 /**
@@ -438,4 +436,3 @@ static void __exit nforce2_exit(void)
 
 module_init(nforce2_init);
 module_exit(nforce2_exit);
-

drivers/cpufreq/ia64-acpi-cpufreq.c

@@ -16,7 +16,6 @@
 #include <linux/init.h>
 #include <linux/cpufreq.h>
 #include <linux/proc_fs.h>
-#include <linux/seq_file.h>
 #include <asm/io.h>
 #include <linux/uaccess.h>
 #include <asm/pal.h>
@@ -28,7 +27,6 @@ MODULE_AUTHOR("Venkatesh Pallipadi");
 MODULE_DESCRIPTION("ACPI Processor P-States Driver");
 MODULE_LICENSE("GPL");
 
-
 struct cpufreq_acpi_io {
 	struct acpi_processor_performance	acpi_data;
 	unsigned int				resume;
@@ -348,10 +346,7 @@ acpi_cpufreq_exit (void)
 	pr_debug("acpi_cpufreq_exit\n");
 
 	cpufreq_unregister_driver(&acpi_cpufreq_driver);
-	return;
 }
 
-
 late_initcall(acpi_cpufreq_init);
 module_exit(acpi_cpufreq_exit);
-

drivers/cpufreq/imx6q-cpufreq.c

@@ -177,22 +177,16 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 	/* scaling down?  scale voltage after frequency */
 	if (new_freq < old_freq) {
 		ret = regulator_set_voltage_tol(arm_reg, volt, 0);
-		if (ret) {
+		if (ret)
 			dev_warn(cpu_dev,
 				 "failed to scale vddarm down: %d\n", ret);
-			ret = 0;
-		}
 		ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
-		if (ret) {
+		if (ret)
 			dev_warn(cpu_dev, "failed to scale vddsoc down: %d\n", ret);
-			ret = 0;
-		}
 		if (!IS_ERR(pu_reg)) {
 			ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
-			if (ret) {
+			if (ret)
 				dev_warn(cpu_dev, "failed to scale vddpu down: %d\n", ret);
-				ret = 0;
-			}
 		}
 	}
 
@@ -411,9 +405,10 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 	if (of_machine_is_compatible("fsl,imx6ul") ||
 	    of_machine_is_compatible("fsl,imx6ull")) {
 		ret = imx6ul_opp_check_speed_grading(cpu_dev);
+		if (ret) {
 			if (ret == -EPROBE_DEFER)
 				return ret;
-		if (ret) {
+
 			dev_err(cpu_dev, "failed to read ocotp: %d\n",
 				ret);
 			return ret;

drivers/cpufreq/intel_pstate.c

@@ -830,6 +830,28 @@ static void intel_pstate_hwp_set(unsigned int cpu)
 	wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
 }
 
+static void intel_pstate_hwp_force_min_perf(int cpu)
+{
+	u64 value;
+	int min_perf;
+
+	value = all_cpu_data[cpu]->hwp_req_cached;
+	value &= ~GENMASK_ULL(31, 0);
+	min_perf = HWP_LOWEST_PERF(all_cpu_data[cpu]->hwp_cap_cached);
+
+	/* Set hwp_max = hwp_min */
+	value |= HWP_MAX_PERF(min_perf);
+	value |= HWP_MIN_PERF(min_perf);
+
+	/* Set EPP/EPB to min */
+	if (static_cpu_has(X86_FEATURE_HWP_EPP))
+		value |= HWP_ENERGY_PERF_PREFERENCE(HWP_EPP_POWERSAVE);
+	else
+		intel_pstate_set_epb(cpu, HWP_EPP_BALANCE_POWERSAVE);
+
+	wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
+}
+
 static int intel_pstate_hwp_save_state(struct cpufreq_policy *policy)
 {
 	struct cpudata *cpu_data = all_cpu_data[policy->cpu];
@@ -2084,10 +2106,12 @@ static void intel_pstate_stop_cpu(struct cpufreq_policy *policy)
 	pr_debug("CPU %d exiting\n", policy->cpu);
 
 	intel_pstate_clear_update_util_hook(policy->cpu);
-	if (hwp_active)
+	if (hwp_active) {
 		intel_pstate_hwp_save_state(policy);
-	else
+		intel_pstate_hwp_force_min_perf(policy->cpu);
+	} else {
 		intel_cpufreq_stop_cpu(policy);
+	}
 }
 
 static int intel_pstate_cpu_exit(struct cpufreq_policy *policy)

drivers/cpufreq/pmac64-cpufreq.c

@@ -411,6 +411,7 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpunode)
 		pfunc_set_vdnap0 = pmf_find_function(root, "set-vdnap0");
 		pfunc_vdnap0_complete =
 			pmf_find_function(root, "slewing-done");
+		of_node_put(root);
 		if (pfunc_set_vdnap0 == NULL ||
 		    pfunc_vdnap0_complete == NULL) {
 			pr_err("Can't find required platform function\n");

drivers/cpufreq/powernv-cpufreq.c

@@ -253,18 +253,18 @@ static int init_powernv_pstates(void)
 
 	if (of_property_read_u32(power_mgt, "ibm,pstate-min", &pstate_min)) {
 		pr_warn("ibm,pstate-min node not found\n");
-		return -ENODEV;
+		goto out;
 	}
 
 	if (of_property_read_u32(power_mgt, "ibm,pstate-max", &pstate_max)) {
 		pr_warn("ibm,pstate-max node not found\n");
-		return -ENODEV;
+		goto out;
 	}
 
 	if (of_property_read_u32(power_mgt, "ibm,pstate-nominal",
 				 &pstate_nominal)) {
 		pr_warn("ibm,pstate-nominal not found\n");
-		return -ENODEV;
+		goto out;
 	}
 
 	if (of_property_read_u32(power_mgt, "ibm,pstate-ultra-turbo",
@@ -293,14 +293,14 @@ static int init_powernv_pstates(void)
 	pstate_ids = of_get_property(power_mgt, "ibm,pstate-ids", &len_ids);
 	if (!pstate_ids) {
 		pr_warn("ibm,pstate-ids not found\n");
-		return -ENODEV;
+		goto out;
 	}
 
 	pstate_freqs = of_get_property(power_mgt, "ibm,pstate-frequencies-mhz",
 				      &len_freqs);
 	if (!pstate_freqs) {
 		pr_warn("ibm,pstate-frequencies-mhz not found\n");
-		return -ENODEV;
+		goto out;
 	}
 
 	if (len_ids != len_freqs) {
@@ -311,7 +311,7 @@ static int init_powernv_pstates(void)
 	nr_pstates = min(len_ids, len_freqs) / sizeof(u32);
 	if (!nr_pstates) {
 		pr_warn("No PStates found\n");
-		return -ENODEV;
+		goto out;
 	}
 
 	powernv_pstate_info.nr_pstates = nr_pstates;
@@ -352,7 +352,12 @@ static int init_powernv_pstates(void)
 
 	/* End of list marker entry */
 	powernv_freqs[i].frequency = CPUFREQ_TABLE_END;
+
+	of_node_put(power_mgt);
 	return 0;
+out:
+	of_node_put(power_mgt);
+	return -ENODEV;
 }
 
 /* Returns the CPU frequency corresponding to the pstate_id. */

drivers/cpufreq/qcom-cpufreq-hw.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+
+#define LUT_MAX_ENTRIES			40U
+#define LUT_SRC				GENMASK(31, 30)
+#define LUT_L_VAL			GENMASK(7, 0)
+#define LUT_CORE_COUNT			GENMASK(18, 16)
+#define LUT_ROW_SIZE			32
+#define CLK_HW_DIV			2
+
+/* Register offsets */
+#define REG_ENABLE			0x0
+#define REG_LUT_TABLE			0x110
+#define REG_PERF_STATE			0x920
+
+static unsigned long cpu_hw_rate, xo_rate;
+static struct platform_device *global_pdev;
+
+static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy,
+					unsigned int index)
+{
+	void __iomem *perf_state_reg = policy->driver_data;
+
+	writel_relaxed(index, perf_state_reg);
+
+	return 0;
+}
+
+static unsigned int qcom_cpufreq_hw_get(unsigned int cpu)
+{
+	void __iomem *perf_state_reg;
+	struct cpufreq_policy *policy;
+	unsigned int index;
+
+	policy = cpufreq_cpu_get_raw(cpu);
+	if (!policy)
+		return 0;
+
+	perf_state_reg = policy->driver_data;
+
+	index = readl_relaxed(perf_state_reg);
+	index = min(index, LUT_MAX_ENTRIES - 1);
+
+	return policy->freq_table[index].frequency;
+}
+
+static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
+						unsigned int target_freq)
+{
+	void __iomem *perf_state_reg = policy->driver_data;
+	int index;
+
+	index = policy->cached_resolved_idx;
+	if (index < 0)
+		return 0;
+
+	writel_relaxed(index, perf_state_reg);
+
+	return policy->freq_table[index].frequency;
+}
+
+static int qcom_cpufreq_hw_read_lut(struct device *dev,
+				    struct cpufreq_policy *policy,
+				    void __iomem *base)
+{
+	u32 data, src, lval, i, core_count, prev_cc = 0, prev_freq = 0, freq;
+	unsigned int max_cores = cpumask_weight(policy->cpus);
+	struct cpufreq_frequency_table	*table;
+
+	table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL);
+	if (!table)
+		return -ENOMEM;
+
+	for (i = 0; i < LUT_MAX_ENTRIES; i++) {
+		data = readl_relaxed(base + REG_LUT_TABLE + i * LUT_ROW_SIZE);
+		src = FIELD_GET(LUT_SRC, data);
+		lval = FIELD_GET(LUT_L_VAL, data);
+		core_count = FIELD_GET(LUT_CORE_COUNT, data);
+
+		if (src)
+			freq = xo_rate * lval / 1000;
+		else
+			freq = cpu_hw_rate / 1000;
+
+		/* Ignore boosts in the middle of the table */
+		if (core_count != max_cores) {
+			table[i].frequency = CPUFREQ_ENTRY_INVALID;
+		} else {
+			table[i].frequency = freq;
+			dev_dbg(dev, "index=%d freq=%d, core_count %d\n", i,
+				freq, core_count);
+		}
+
+		/*
+		 * Two of the same frequencies with the same core counts means
+		 * end of table
+		 */
+		if (i > 0 && prev_freq == freq && prev_cc == core_count) {
+			struct cpufreq_frequency_table *prev = &table[i - 1];
+
+			/*
+			 * Only treat the last frequency that might be a boost
+			 * as the boost frequency
+			 */
+			if (prev_cc != max_cores) {
+				prev->frequency = prev_freq;
+				prev->flags = CPUFREQ_BOOST_FREQ;
+			}
+
+			break;
+		}
+
+		prev_cc = core_count;
+		prev_freq = freq;
+	}
+
+	table[i].frequency = CPUFREQ_TABLE_END;
+	policy->freq_table = table;
+
+	return 0;
+}
+
+static void qcom_get_related_cpus(int index, struct cpumask *m)
+{
+	struct device_node *cpu_np;
+	struct of_phandle_args args;
+	int cpu, ret;
+
+	for_each_possible_cpu(cpu) {
+		cpu_np = of_cpu_device_node_get(cpu);
+		if (!cpu_np)
+			continue;
+
+		ret = of_parse_phandle_with_args(cpu_np, "qcom,freq-domain",
+						 "#freq-domain-cells", 0,
+						 &args);
+		of_node_put(cpu_np);
+		if (ret < 0)
+			continue;
+
+		if (index == args.args[0])
+			cpumask_set_cpu(cpu, m);
+	}
+}
+
+static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
+{
+	struct device *dev = &global_pdev->dev;
+	struct of_phandle_args args;
+	struct device_node *cpu_np;
+	struct resource *res;
+	void __iomem *base;
+	int ret, index;
+
+	cpu_np = of_cpu_device_node_get(policy->cpu);
+	if (!cpu_np)
+		return -EINVAL;
+
+	ret = of_parse_phandle_with_args(cpu_np, "qcom,freq-domain",
+					 "#freq-domain-cells", 0, &args);
+	of_node_put(cpu_np);
+	if (ret)
+		return ret;
+
+	index = args.args[0];
+
+	res = platform_get_resource(global_pdev, IORESOURCE_MEM, index);
+	if (!res)
+		return -ENODEV;
+
+	base = devm_ioremap(dev, res->start, resource_size(res));
+	if (!base)
+		return -ENOMEM;
+
+	/* HW should be in enabled state to proceed */
+	if (!(readl_relaxed(base + REG_ENABLE) & 0x1)) {
+		dev_err(dev, "Domain-%d cpufreq hardware not enabled\n", index);
+		ret = -ENODEV;
+		goto error;
+	}
+
+	qcom_get_related_cpus(index, policy->cpus);
+	if (!cpumask_weight(policy->cpus)) {
+		dev_err(dev, "Domain-%d failed to get related CPUs\n", index);
+		ret = -ENOENT;
+		goto error;
+	}
+
+	policy->driver_data = base + REG_PERF_STATE;
+
+	ret = qcom_cpufreq_hw_read_lut(dev, policy, base);
+	if (ret) {
+		dev_err(dev, "Domain-%d failed to read LUT\n", index);
+		goto error;
+	}
+
+	policy->fast_switch_possible = true;
+
+	return 0;
+error:
+	devm_iounmap(dev, base);
+	return ret;
+}
+
+static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
+{
+	void __iomem *base = policy->driver_data - REG_PERF_STATE;
+
+	kfree(policy->freq_table);
+	devm_iounmap(&global_pdev->dev, base);
+
+	return 0;
+}
+
+static struct freq_attr *qcom_cpufreq_hw_attr[] = {
+	&cpufreq_freq_attr_scaling_available_freqs,
+	&cpufreq_freq_attr_scaling_boost_freqs,
+	NULL
+};
+
+static struct cpufreq_driver cpufreq_qcom_hw_driver = {
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK |
+			  CPUFREQ_HAVE_GOVERNOR_PER_POLICY,
+	.verify		= cpufreq_generic_frequency_table_verify,
+	.target_index	= qcom_cpufreq_hw_target_index,
+	.get		= qcom_cpufreq_hw_get,
+	.init		= qcom_cpufreq_hw_cpu_init,
+	.exit		= qcom_cpufreq_hw_cpu_exit,
+	.fast_switch    = qcom_cpufreq_hw_fast_switch,
+	.name		= "qcom-cpufreq-hw",
+	.attr		= qcom_cpufreq_hw_attr,
+};
+
+static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
+{
+	struct clk *clk;
+	int ret;
+
+	clk = clk_get(&pdev->dev, "xo");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	xo_rate = clk_get_rate(clk);
+	clk_put(clk);
+
+	clk = clk_get(&pdev->dev, "alternate");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	cpu_hw_rate = clk_get_rate(clk) / CLK_HW_DIV;
+	clk_put(clk);
+
+	global_pdev = pdev;
+
+	ret = cpufreq_register_driver(&cpufreq_qcom_hw_driver);
+	if (ret)
+		dev_err(&pdev->dev, "CPUFreq HW driver failed to register\n");
+	else
+		dev_dbg(&pdev->dev, "QCOM CPUFreq HW driver initialized\n");
+
+	return ret;
+}
+
+static int qcom_cpufreq_hw_driver_remove(struct platform_device *pdev)
+{
+	return cpufreq_unregister_driver(&cpufreq_qcom_hw_driver);
+}
+
+static const struct of_device_id qcom_cpufreq_hw_match[] = {
+	{ .compatible = "qcom,cpufreq-hw" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match);
+
+static struct platform_driver qcom_cpufreq_hw_driver = {
+	.probe = qcom_cpufreq_hw_driver_probe,
+	.remove = qcom_cpufreq_hw_driver_remove,
+	.driver = {
+		.name = "qcom-cpufreq-hw",
+		.of_match_table = qcom_cpufreq_hw_match,
+	},
+};
+
+static int __init qcom_cpufreq_hw_init(void)
+{
+	return platform_driver_register(&qcom_cpufreq_hw_driver);
+}
+subsys_initcall(qcom_cpufreq_hw_init);
+
+static void __exit qcom_cpufreq_hw_exit(void)
+{
+	platform_driver_unregister(&qcom_cpufreq_hw_driver);
+}
+module_exit(qcom_cpufreq_hw_exit);
+
+MODULE_DESCRIPTION("QCOM CPUFREQ HW Driver");
+MODULE_LICENSE("GPL v2");

drivers/cpufreq/s3c24xx-cpufreq-debugfs.c

@@ -63,18 +63,7 @@ static int board_show(struct seq_file *seq, void *p)
 	return 0;
 }
 
-static int fops_board_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, board_show, NULL);
-}
-
-static const struct file_operations fops_board = {
-	.open		= fops_board_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.owner		= THIS_MODULE,
-};
+DEFINE_SHOW_ATTRIBUTE(board);
 
 static int info_show(struct seq_file *seq, void *p)
 {
@@ -105,18 +94,7 @@ static int info_show(struct seq_file *seq, void *p)
 	return 0;
 }
 
-static int fops_info_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, info_show, NULL);
-}
-
-static const struct file_operations fops_info = {
-	.open		= fops_info_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.owner		= THIS_MODULE,
-};
+DEFINE_SHOW_ATTRIBUTE(info);
 
 static int io_show(struct seq_file *seq, void *p)
 {
@@ -162,19 +140,7 @@ static int io_show(struct seq_file *seq, void *p)
 	return 0;
 }
 
-static int fops_io_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, io_show, NULL);
-}
-
-static const struct file_operations fops_io = {
-	.open		= fops_io_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.owner		= THIS_MODULE,
-};
-
+DEFINE_SHOW_ATTRIBUTE(io);
 
 static int __init s3c_freq_debugfs_init(void)
 {
@@ -185,13 +151,13 @@ static int __init s3c_freq_debugfs_init(void)
 	}
 
 	dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
-					    NULL, &fops_io);
+					    NULL, &io_fops);
 
 	dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
-					      NULL, &fops_info);
+					      NULL, &info_fops);
 
 	dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
-					       NULL, &fops_board);
+					       NULL, &board_fops);
 
 	return 0;
 }

drivers/cpuidle/cpuidle-big_little.c

@@ -167,6 +167,7 @@ static int __init bl_idle_init(void)
 {
 	int ret;
 	struct device_node *root = of_find_node_by_path("/");
+	const struct of_device_id *match_id;
 
 	if (!root)
 		return -ENODEV;
@@ -174,7 +175,11 @@ static int __init bl_idle_init(void)
 	/*
 	 * Initialize the driver just for a compliant set of machines
 	 */
-	if (!of_match_node(compatible_machine_match, root))
+	match_id = of_match_node(compatible_machine_match, root);
+
+	of_node_put(root);
+
+	if (!match_id)
 		return -ENODEV;
 
 	if (!mcpm_is_available())

drivers/cpuidle/cpuidle.c

@@ -202,7 +202,6 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 	struct cpuidle_state *target_state = &drv->states[index];
 	bool broadcast = !!(target_state->flags & CPUIDLE_FLAG_TIMER_STOP);
 	ktime_t time_start, time_end;
-	s64 diff;
 
 	/*
 	 * Tell the time framework to switch to a broadcast timer because our
@@ -248,6 +247,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 		local_irq_enable();
 
 	if (entered_state >= 0) {
+		s64 diff, delay = drv->states[entered_state].exit_latency;
+		int i;
+
 		/*
 		 * Update cpuidle counters
 		 * This can be moved to within driver enter routine,
@@ -260,6 +262,33 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 		dev->last_residency = (int)diff;
 		dev->states_usage[entered_state].time += dev->last_residency;
 		dev->states_usage[entered_state].usage++;
+
+		if (diff < drv->states[entered_state].target_residency) {
+			for (i = entered_state - 1; i >= 0; i--) {
+				if (drv->states[i].disabled ||
+				    dev->states_usage[i].disable)
+					continue;
+
+				/* Shallower states are enabled, so update. */
+				dev->states_usage[entered_state].above++;
+				break;
+			}
+		} else if (diff > delay) {
+			for (i = entered_state + 1; i < drv->state_count; i++) {
+				if (drv->states[i].disabled ||
+				    dev->states_usage[i].disable)
+					continue;
+
+				/*
+				 * Update if a deeper state would have been a
+				 * better match for the observed idle duration.
+				 */
+				if (diff - delay >= drv->states[i].target_residency)
+					dev->states_usage[entered_state].below++;
+
+				break;
+			}
+		}
 	} else {
 		dev->last_residency = 0;
 	}
@@ -702,4 +731,5 @@ static int __init cpuidle_init(void)
 }
 
 module_param(off, int, 0444);
+module_param_string(governor, param_governor, CPUIDLE_NAME_LEN, 0444);
 core_initcall(cpuidle_init);

drivers/cpuidle/cpuidle.h

@@ -7,6 +7,7 @@
 #define __DRIVER_CPUIDLE_H
 
 /* For internal use only */
+extern char param_governor[];
 extern struct cpuidle_governor *cpuidle_curr_governor;
 extern struct list_head cpuidle_governors;
 extern struct list_head cpuidle_detected_devices;

drivers/cpuidle/governor.c

@@ -11,10 +11,13 @@
 #include <linux/cpu.h>
 #include <linux/cpuidle.h>
 #include <linux/mutex.h>
+#include <linux/module.h>
 #include <linux/pm_qos.h>
 
 #include "cpuidle.h"
 
+char param_governor[CPUIDLE_NAME_LEN];
+
 LIST_HEAD(cpuidle_governors);
 struct cpuidle_governor *cpuidle_curr_governor;
 
@@ -86,9 +89,11 @@ int cpuidle_register_governor(struct cpuidle_governor *gov)
 	mutex_lock(&cpuidle_lock);
 	if (__cpuidle_find_governor(gov->name) == NULL) {
 		ret = 0;
-		list_add_tail(&gov->governor_list, &cpuidle_governors);
 		if (!cpuidle_curr_governor ||
-		    cpuidle_curr_governor->rating < gov->rating)
+		    !strncasecmp(param_governor, gov->name, CPUIDLE_NAME_LEN) ||
+		    (cpuidle_curr_governor->rating < gov->rating &&
+		     strncasecmp(param_governor, cpuidle_curr_governor->name,
+				 CPUIDLE_NAME_LEN)))
 			cpuidle_switch_governor(gov);
 	}
 	mutex_unlock(&cpuidle_lock);

drivers/cpuidle/poll_state.c

@@ -20,8 +20,17 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
 
 	local_irq_enable();
 	if (!current_set_polling_and_test()) {
-		u64 limit = (u64)drv->states[1].target_residency * NSEC_PER_USEC;
 		unsigned int loop_count = 0;
+		u64 limit = TICK_USEC;
+		int i;
+
+		for (i = 1; i < drv->state_count; i++) {
+			if (drv->states[i].disabled || dev->states_usage[i].disable)
+				continue;
+
+			limit = (u64)drv->states[i].target_residency * NSEC_PER_USEC;
+			break;
+		}
 
 		while (!need_resched()) {
 			cpu_relax();

drivers/cpuidle/sysfs.c

@@ -301,6 +301,8 @@ define_show_state_str_function(name)
 define_show_state_str_function(desc)
 define_show_state_ull_function(disable)
 define_store_state_ull_function(disable)
+define_show_state_ull_function(above)
+define_show_state_ull_function(below)
 
 define_one_state_ro(name, show_state_name);
 define_one_state_ro(desc, show_state_desc);
@@ -310,6 +312,8 @@ define_one_state_ro(power, show_state_power_usage);
 define_one_state_ro(usage, show_state_usage);
 define_one_state_ro(time, show_state_time);
 define_one_state_rw(disable, show_state_disable, store_state_disable);
+define_one_state_ro(above, show_state_above);
+define_one_state_ro(below, show_state_below);
 
 static struct attribute *cpuidle_state_default_attrs[] = {
 	&attr_name.attr,
@@ -320,6 +324,8 @@ static struct attribute *cpuidle_state_default_attrs[] = {
 	&attr_usage.attr,
 	&attr_time.attr,
 	&attr_disable.attr,
+	&attr_above.attr,
+	&attr_below.attr,
 	NULL
 };
 

drivers/devfreq/devfreq.c

@@ -285,6 +285,44 @@ static int devfreq_notify_transition(struct devfreq *devfreq,
 	return 0;
 }
 
+static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq,
+			      u32 flags)
+{
+	struct devfreq_freqs freqs;
+	unsigned long cur_freq;
+	int err = 0;
+
+	if (devfreq->profile->get_cur_freq)
+		devfreq->profile->get_cur_freq(devfreq->dev.parent, &cur_freq);
+	else
+		cur_freq = devfreq->previous_freq;
+
+	freqs.old = cur_freq;
+	freqs.new = new_freq;
+	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE);
+
+	err = devfreq->profile->target(devfreq->dev.parent, &new_freq, flags);
+	if (err) {
+		freqs.new = cur_freq;
+		devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
+		return err;
+	}
+
+	freqs.new = new_freq;
+	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
+
+	if (devfreq_update_status(devfreq, new_freq))
+		dev_err(&devfreq->dev,
+			"Couldn't update frequency transition information.\n");
+
+	devfreq->previous_freq = new_freq;
+
+	if (devfreq->suspend_freq)
+		devfreq->resume_freq = cur_freq;
+
+	return err;
+}
+
 /* Load monitoring helper functions for governors use */
 
 /**
@@ -296,8 +334,7 @@ static int devfreq_notify_transition(struct devfreq *devfreq,
  */
 int update_devfreq(struct devfreq *devfreq)
 {
-	struct devfreq_freqs freqs;
-	unsigned long freq, cur_freq, min_freq, max_freq;
+	unsigned long freq, min_freq, max_freq;
 	int err = 0;
 	u32 flags = 0;
 
@@ -333,31 +370,8 @@ int update_devfreq(struct devfreq *devfreq)
 		flags |= DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use LUB */
 	}
 
-	if (devfreq->profile->get_cur_freq)
-		devfreq->profile->get_cur_freq(devfreq->dev.parent, &cur_freq);
-	else
-		cur_freq = devfreq->previous_freq;
-
-	freqs.old = cur_freq;
-	freqs.new = freq;
-	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE);
+	return devfreq_set_target(devfreq, freq, flags);
 
-	err = devfreq->profile->target(devfreq->dev.parent, &freq, flags);
-	if (err) {
-		freqs.new = cur_freq;
-		devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
-		return err;
-	}
-
-	freqs.new = freq;
-	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
-
-	if (devfreq_update_status(devfreq, freq))
-		dev_err(&devfreq->dev,
-			"Couldn't update frequency transition information.\n");
-
-	devfreq->previous_freq = freq;
-	return err;
 }
 EXPORT_SYMBOL(update_devfreq);
 
@@ -657,6 +671,9 @@ struct devfreq *devfreq_add_device(struct device *dev,
 	}
 	devfreq->max_freq = devfreq->scaling_max_freq;
 
+	devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev);
+	atomic_set(&devfreq->suspend_count, 0);
+
 	dev_set_name(&devfreq->dev, "devfreq%d",
 				atomic_inc_return(&devfreq_no));
 	err = device_register(&devfreq->dev);
@@ -857,14 +874,28 @@ EXPORT_SYMBOL(devm_devfreq_remove_device);
  */
 int devfreq_suspend_device(struct devfreq *devfreq)
 {
+	int ret;
+
 	if (!devfreq)
 		return -EINVAL;
 
-	if (!devfreq->governor)
+	if (atomic_inc_return(&devfreq->suspend_count) > 1)
 		return 0;
 
-	return devfreq->governor->event_handler(devfreq,
+	if (devfreq->governor) {
+		ret = devfreq->governor->event_handler(devfreq,
 					DEVFREQ_GOV_SUSPEND, NULL);
+		if (ret)
+			return ret;
+	}
+
+	if (devfreq->suspend_freq) {
+		ret = devfreq_set_target(devfreq, devfreq->suspend_freq, 0);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 EXPORT_SYMBOL(devfreq_suspend_device);
 
@@ -878,17 +909,75 @@ EXPORT_SYMBOL(devfreq_suspend_device);
  */
 int devfreq_resume_device(struct devfreq *devfreq)
 {
+	int ret;
+
 	if (!devfreq)
 		return -EINVAL;
 
-	if (!devfreq->governor)
+	if (atomic_dec_return(&devfreq->suspend_count) >= 1)
 		return 0;
 
-	return devfreq->governor->event_handler(devfreq,
+	if (devfreq->resume_freq) {
+		ret = devfreq_set_target(devfreq, devfreq->resume_freq, 0);
+		if (ret)
+			return ret;
+	}
+
+	if (devfreq->governor) {
+		ret = devfreq->governor->event_handler(devfreq,
 					DEVFREQ_GOV_RESUME, NULL);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 EXPORT_SYMBOL(devfreq_resume_device);
 
+/**
+ * devfreq_suspend() - Suspend devfreq governors and devices
+ *
+ * Called during system wide Suspend/Hibernate cycles for suspending governors
+ * and devices preserving the state for resume. On some platforms the devfreq
+ * device must have precise state (frequency) after resume in order to provide
+ * fully operating setup.
+ */
+void devfreq_suspend(void)
+{
+	struct devfreq *devfreq;
+	int ret;
+
+	mutex_lock(&devfreq_list_lock);
+	list_for_each_entry(devfreq, &devfreq_list, node) {
+		ret = devfreq_suspend_device(devfreq);
+		if (ret)
+			dev_err(&devfreq->dev,
+				"failed to suspend devfreq device\n");
+	}
+	mutex_unlock(&devfreq_list_lock);
+}
+
+/**
+ * devfreq_resume() - Resume devfreq governors and devices
+ *
+ * Called during system wide Suspend/Hibernate cycle for resuming governors and
+ * devices that are suspended with devfreq_suspend().
+ */
+void devfreq_resume(void)
+{
+	struct devfreq *devfreq;
+	int ret;
+
+	mutex_lock(&devfreq_list_lock);
+	list_for_each_entry(devfreq, &devfreq_list, node) {
+		ret = devfreq_resume_device(devfreq);
+		if (ret)
+			dev_warn(&devfreq->dev,
+				 "failed to resume devfreq device\n");
+	}
+	mutex_unlock(&devfreq_list_lock);
+}
+
 /**
  * devfreq_add_governor() - Add devfreq governor
  * @governor:	the devfreq governor to be added

drivers/opp/opp.h

@@ -63,6 +63,7 @@ extern struct list_head opp_tables;
  * @supplies:	Power supplies voltage/current values
  * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
  *		frequency from any other OPP's frequency.
+ * @required_opps: List of OPPs that are required by this OPP.
  * @opp_table:	points back to the opp_table struct this opp belongs to
  * @np:		OPP's device node.
  * @dentry:	debugfs dentry pointer (per opp)
@@ -84,6 +85,7 @@ struct dev_pm_opp {
 
 	unsigned long clock_latency_ns;
 
+	struct dev_pm_opp **required_opps;
 	struct opp_table *opp_table;
 
 	struct device_node *np;
@@ -133,13 +135,21 @@ enum opp_table_access {
  * @parsed_static_opps: True if OPPs are initialized from DT.
  * @shared_opp: OPP is shared between multiple devices.
  * @suspend_opp: Pointer to OPP to be used during device suspend.
+ * @genpd_virt_dev_lock: Mutex protecting the genpd virtual device pointers.
+ * @genpd_virt_devs: List of virtual devices for multiple genpd support.
+ * @required_opp_tables: List of device OPP tables that are required by OPPs in
+ *		this table.
+ * @required_opp_count: Number of required devices.
  * @supported_hw: Array of version number to support.
  * @supported_hw_count: Number of elements in supported_hw array.
  * @prop_name: A name to postfix to many DT properties, while parsing them.
  * @clk: Device's clock handle
  * @regulators: Supply regulators
- * @regulator_count: Number of power supply regulators
+ * @regulator_count: Number of power supply regulators. Its value can be -1
+ * (uninitialized), 0 (no opp-microvolt property) or > 0 (has opp-microvolt
+ * property).
  * @genpd_performance_state: Device's power domain support performance state.
+ * @is_genpd: Marks if the OPP table belongs to a genpd.
  * @set_opp: Platform specific set_opp callback
  * @set_opp_data: Data to be passed to set_opp callback
  * @dentry:	debugfs dentry pointer of the real device directory (not links).
@@ -171,13 +181,19 @@ struct opp_table {
 	enum opp_table_access shared_opp;
 	struct dev_pm_opp *suspend_opp;
 
+	struct mutex genpd_virt_dev_lock;
+	struct device **genpd_virt_devs;
+	struct opp_table **required_opp_tables;
+	unsigned int required_opp_count;
+
 	unsigned int *supported_hw;
 	unsigned int supported_hw_count;
 	const char *prop_name;
 	struct clk *clk;
 	struct regulator **regulators;
-	unsigned int regulator_count;
+	int regulator_count;
 	bool genpd_performance_state;
+	bool is_genpd;
 
 	int (*set_opp)(struct dev_pm_set_opp_data *data);
 	struct dev_pm_set_opp_data *set_opp_data;
@@ -206,10 +222,16 @@ void _put_opp_list_kref(struct opp_table *opp_table);
 
 #ifdef CONFIG_OF
 void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index);
+void _of_clear_opp_table(struct opp_table *opp_table);
 struct opp_table *_managed_opp(struct device *dev, int index);
+void _of_opp_free_required_opps(struct opp_table *opp_table,
+				struct dev_pm_opp *opp);
 #else
 static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index) {}
+static inline void _of_clear_opp_table(struct opp_table *opp_table) {}
 static inline struct opp_table *_managed_opp(struct device *dev, int index) { return NULL; }
+static inline void _of_opp_free_required_opps(struct opp_table *opp_table,
+					      struct dev_pm_opp *opp) {}
 #endif
 
 #ifdef CONFIG_DEBUG_FS

drivers/power/avs/smartreflex.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * OMAP SmartReflex Voltage Control
  *
@@ -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.
  */
 
 #include <linux/module.h>
@@ -37,7 +34,6 @@
 static LIST_HEAD(sr_list);
 
 static struct omap_sr_class_data *sr_class;
-static struct omap_sr_pmic_data *sr_pmic_data;
 static struct dentry		*sr_dbg_dir;
 
 static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value)
@@ -780,25 +776,6 @@ void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
 	sr_class->disable(sr, 1);
 }
 
-/**
- * omap_sr_register_pmic() - API to register pmic specific info.
- * @pmic_data:	The structure containing pmic specific data.
- *
- * This API is to be called from the PMIC specific code to register with
- * smartreflex driver pmic specific info. Currently the only info required
- * is the smartreflex init on the PMIC side.
- */
-void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data)
-{
-	if (!pmic_data) {
-		pr_warn("%s: Trying to register NULL PMIC data structure with smartreflex\n",
-			__func__);
-		return;
-	}
-
-	sr_pmic_data = pmic_data;
-}
-
 /* PM Debug FS entries to enable and disable smartreflex. */
 static int omap_sr_autocomp_show(void *data, u64 *val)
 {
@@ -1010,7 +987,6 @@ static int omap_sr_remove(struct platform_device *pdev)
 
 	if (sr_info->autocomp_active)
 		sr_stop_vddautocomp(sr_info);
-	if (sr_info->dbg_dir)
 	debugfs_remove_recursive(sr_info->dbg_dir);
 
 	pm_runtime_disable(&pdev->dev);
@@ -1065,17 +1041,6 @@ static int __init sr_init(void)
 {
 	int ret = 0;
 
-	/*
-	 * sr_init is a late init. If by then a pmic specific API is not
-	 * registered either there is no need for anything to be done on
-	 * the PMIC side or somebody has forgotten to register a PMIC
-	 * handler. Warn for the second condition.
-	 */
-	if (sr_pmic_data && sr_pmic_data->sr_pmic_init)
-		sr_pmic_data->sr_pmic_init();
-	else
-		pr_warn("%s: No PMIC hook to init smartreflex\n", __func__);
-
 	ret = platform_driver_register(&smartreflex_driver);
 	if (ret) {
 		pr_err("%s: platform driver register failed for SR\n",

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 */

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)
 {

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;

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;
 }

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
 

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){}

include/linux/power/smartreflex.h

+/* 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

kernel/power/main.c

@@ -318,23 +318,12 @@ static int suspend_stats_show(struct seq_file *s, void *unused)
 
 	return 0;
 }
-
-static int suspend_stats_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, suspend_stats_show, NULL);
-}
-
-static const struct file_operations suspend_stats_operations = {
-	.open           = suspend_stats_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(suspend_stats);
 
 static int __init pm_debugfs_init(void)
 {
 	debugfs_create_file("suspend_stats", S_IFREG | S_IRUGO,
-			NULL, NULL, &suspend_stats_operations);
+			NULL, NULL, &suspend_stats_fops);
 	return 0;
 }
 

kernel/power/qos.c

@@ -184,7 +184,7 @@ static inline void pm_qos_set_value(struct pm_qos_constraints *c, s32 value)
 	c->target_value = value;
 }
 
-static int pm_qos_dbg_show_requests(struct seq_file *s, void *unused)
+static int pm_qos_debug_show(struct seq_file *s, void *unused)
 {
 	struct pm_qos_object *qos = (struct pm_qos_object *)s->private;
 	struct pm_qos_constraints *c;
@@ -245,18 +245,7 @@ static int pm_qos_dbg_show_requests(struct seq_file *s, void *unused)
 	return 0;
 }
 
-static int pm_qos_dbg_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, pm_qos_dbg_show_requests,
-			   inode->i_private);
-}
-
-static const struct file_operations pm_qos_debug_fops = {
-	.open           = pm_qos_dbg_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(pm_qos_debug);
 
 /**
  * pm_qos_update_target - manages the constraints list and calls the notifiers

kernel/sched/cpufreq.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Scheduler code and data structures related to cpufreq.
  *
  * Copyright (C) 2016, Intel Corporation
  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.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.
  */
 #include "sched.h"
 

kernel/sched/cpufreq_schedutil.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * CPUFreq governor based on scheduler-provided CPU utilization data.
  *
  * Copyright (C) 2016, Intel Corporation
  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.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.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

tools/power/cpupower/Makefile

@@ -89,6 +89,7 @@ endif
 localedir ?=	/usr/share/locale
 docdir ?=       /usr/share/doc/packages/cpupower
 confdir ?=      /etc/
+bash_completion_dir ?= /usr/share/bash-completion/completions
 
 # Toolchain: what tools do we use, and what options do they need:
 
@@ -96,7 +97,8 @@ CP = cp -fpR
 INSTALL = /usr/bin/install -c
 INSTALL_PROGRAM = ${INSTALL}
 INSTALL_DATA  = ${INSTALL} -m 644
-INSTALL_SCRIPT = ${INSTALL_PROGRAM}
+#bash completion scripts get sourced and so they should be rw only.
+INSTALL_SCRIPT = ${INSTALL} -m 644
 
 # If you are running a cross compiler, you may want to set this
 # to something more interesting, like "arm-linux-".  If you want
@@ -288,6 +290,8 @@ install-lib:
 install-tools:
 	$(INSTALL) -d $(DESTDIR)${bindir}
 	$(INSTALL_PROGRAM) $(OUTPUT)cpupower $(DESTDIR)${bindir}
+	$(INSTALL) -d $(DESTDIR)${bash_completion_dir}
+	$(INSTALL_SCRIPT) cpupower-completion.sh '$(DESTDIR)${bash_completion_dir}/cpupower'
 
 install-man:
 	$(INSTALL_DATA) -D man/cpupower.1 $(DESTDIR)${mandir}/man1/cpupower.1

tools/power/cpupower/cpupower-completion.sh

+# -*- shell-script -*-
+# bash completion script for cpupower
+# Taken from git.git's completion script.
+
+_cpupower_commands="frequency-info frequency-set idle-info idle-set set info monitor"
+
+_frequency_info ()
+{
+	local flags="-f -w -l -d -p -g -a -s -y -o -m -n --freq --hwfreq --hwlimits --driver --policy --governors --related-cpus --affected-cpus --stats --latency --proc --human --no-rounding"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev" in
+		frequency-info) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;;
+	esac
+}
+
+_frequency_set ()
+{
+	local flags="-f -g --freq --governor -d --min -u --max -r --related"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev" in
+		-f| --freq | -d | --min | -u | --max)
+		if [ -d /sys/devices/system/cpu/cpufreq/ ] ; then
+			COMPREPLY=($(compgen -W '$(cat $(ls -d /sys/devices/system/cpu/cpufreq/policy* | head -1)/scaling_available_frequencies)' -- "$cur"))
+		fi ;;
+		-g| --governor)
+		if [ -d /sys/devices/system/cpu/cpufreq/ ] ; then
+			COMPREPLY=($(compgen -W '$(cat $(ls -d /sys/devices/system/cpu/cpufreq/policy* | head -1)/scaling_available_governors)' -- "$cur"))
+		fi;;
+		frequency-set) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;;
+	esac
+}
+
+_idle_info()
+{
+	local flags="-f --silent"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev" in
+		idle-info) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;;
+	esac
+}
+
+_idle_set()
+{
+	local flags="-d --disable -e --enable -D --disable-by-latency -E --enable-all"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev" in
+		idle-set) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;;
+	esac
+}
+
+_set()
+{
+	local flags="--perf-bias, -b"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev" in
+		set) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;;
+	esac
+}
+
+_monitor()
+{
+	local flags="-l -m -i -c -v"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev" in
+		monitor) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;;
+	esac
+}
+
+_taskset()
+{
+	local prev_to_prev="${COMP_WORDS[COMP_CWORD-2]}"
+	local prev="${COMP_WORDS[COMP_CWORD-1]}"
+	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "$prev_to_prev" in
+		-c|--cpu) COMPREPLY=($(compgen -W "$_cpupower_commands" -- "$cur")) ;;
+	esac
+	case "$prev" in
+		frequency-info) _frequency_info ;;
+		frequency-set) _frequency_set ;;
+		idle-info) _idle_info ;;
+		idle-set) _idle_set ;;
+		set) _set ;;
+		monitor) _monitor ;;
+	esac
+
+}
+
+_cpupower ()
+{
+	local i
+	local c=1
+	local command
+
+	while test $c -lt $COMP_CWORD; do
+		if test $c == 1; then
+			command="${COMP_WORDS[c]}"
+		fi
+		c=$((++c))
+	done
+
+	# Complete name of subcommand if the user has not finished typing it yet.
+	if test $c -eq $COMP_CWORD -a -z "$command"; then
+		COMPREPLY=($(compgen -W "help -v --version -c --cpu $_cpupower_commands" -- "${COMP_WORDS[COMP_CWORD]}"))
+		return
+	fi
+
+	# Complete arguments to subcommands.
+	case "$command" in
+		-v|--version) return ;;
+		-c|--cpu) _taskset ;;
+		help) COMPREPLY=($(compgen -W "$_cpupower_commands" -- "${COMP_WORDS[COMP_CWORD]}")) ;;
+		frequency-info) _frequency_info ;;
+		frequency-set) _frequency_set ;;
+		idle-info) _idle_info ;;
+		idle-set) _idle_set ;;
+		set) _set ;;
+		monitor) _monitor ;;
+	esac
+}
+
+complete -o bashdefault -o default -F _cpupower cpupower 2>/dev/null \
+    || complete -o default -F _cpupower cpupower

tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py

@@ -585,9 +585,9 @@ current_max_cpu = 0
 
 read_trace_data(filename)
 
-clear_trace_file()
-# Free the memory
 if interval:
+    clear_trace_file()
+    # Free the memory
     free_trace_buffer()
 
 if graph_data_present == False: