Merge tag 'pm-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "This time the majority of changes go to the cpufreq subsystem (and to
  the intel_pstate driver in particular) and there are some updates in
  the generic power domains framework, cpuidle, tools and a couple of
  other places.

  One thing worth mentioning is that the intel_pstate's sysfs interface
  has been reworked to be more consistent with the general expectations
  of the cpufreq core and less confusing, hopefully for the better.
  Also, we have a new cpufreq driver for Tegra186 and new hardware
  support in intel_pstata and the Mediatek cpufreq driver.

  Apart from that, the AnalyzeSuspend utility for system suspend
  profiling gets a companion called AnalyzeBoot for the analogous
  profiling of system boot and they both go into one place under
  tools/power/pm-graph/.

  The rest is mostly fixes, cleanups and code reorganization.

  Specifics:

   - Rework the intel_pstate driver's sysfs interface to make it more
     straightforward and more intuitive (Rafael Wysocki).

   - Make intel_pstate support all processors which advertise HWP
     (hardware-managed P-states) to the kernel in all operation modes
     and make it use the load-based P-state selection algorithm on a
     wider range of systems in the active mode (Rafael Wysocki).

   - Add cpufreq driver for Tegra186 (Mikko Perttunen).

   - Add support for Gemini Lake SoCs to intel_pstate (David Box).

   - Add support for MT8176 and MT817x to the Mediatek cpufreq driver
     and clean up that driver a bit (Daniel Kurtz).

   - Clean up intel_pstate and optimize it slightly (Rafael Wysocki).

   - Update the schedutil cpufreq governor, mostly to fix a couple of
     issues with it related to specific workloads, and rework its sysfs
     tunable and initialization a bit (Rafael Wysocki, Viresh Kumar).

   - Fix minor issues in the imx6q, dbx500 and qoriq cpufreq drivers
     (Christophe Jaillet, Irina Tirdea, Leonard Crestez, Viresh Kumar,
     YuanTian Tang).

   - Add file patterns for cpufreq DT bindings to MAINTAINERS (Geert
     Uytterhoeven).

   - Add support for "always on" power domains to the genpd (generic
     power domains) framework and clean up that code somewhat (Ulf
     Hansson, Lina Iyer, Viresh Kumar).

   - Fix minor issues in the powernv cpuidle driver and clean it up
     (Anton Blanchard, Gautham Shenoy).

   - Move the AnalyzeSuspend utility under tools/power/pm-graph/ and add
     an analogous boot-profiling utility called AnalyzeBoot to it (Todd
     Brandt).

   - Add rk3328 support to the rockchip-io AVS (Adaptive Voltage
     Scaling) driver (David Wu).

   - Fix minor issues in the cpuidle core, the intel_pstate_tracer
     utility, the devfreq framework and the PM core documentation
     (Chanwoo Choi, Doug Smythies, Johan Hovold, Marcin Nowakowski)"

* tag 'pm-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (56 commits)
  PM / runtime: Document autosuspend-helper side effects
  PM / runtime: Fix autosuspend documentation
  tools: power: pm-graph: Package makefile and man pages
  tools: power: pm-graph: AnalyzeBoot v2.0
  tools: power: pm-graph: AnalyzeSuspend v4.6
  cpufreq: Add Tegra186 cpufreq driver
  cpufreq: imx6q: Fix error handling code
  cpufreq: imx6q: Set max suspend_freq to avoid changes during suspend
  cpufreq: imx6q: Fix handling EPROBE_DEFER from regulator
  cpuidle: powernv: Avoid a branch in the core snooze_loop() loop
  cpuidle: powernv: Don't continually set thread priority in snooze_loop()
  cpuidle: powernv: Don't bounce between low and very low thread priority
  cpuidle: cpuidle-cps: remove unused variable
  tools/power/x86/intel_pstate_tracer: Adjust directory ownership
  cpufreq: schedutil: Use policy-dependent transition delays
  cpufreq: schedutil: Reduce frequencies slower
  PM / devfreq: Move struct devfreq_governor to devfreq directory
  PM / Domains: Ignore domain-idle-states that are not compatible
  cpufreq: intel_pstate: Add support for Gemini Lake
  powernv-cpuidle: Validate DT property array size
  ...

Documentation/devicetree/bindings/power/power_domain.txt

@@ -31,7 +31,9 @@ Optional properties:
 
 - domain-idle-states : A phandle of an idle-state that shall be soaked into a
                 generic domain power state. The idle state definitions are
-                compatible with domain-idle-state specified in [1].
+                compatible with domain-idle-state specified in [1]. phandles
+                that are not compatible with domain-idle-state will be
+                ignored.
   The domain-idle-state property reflects the idle state of this PM domain and
   not the idle states of the devices or sub-domains in the PM domain. Devices
   and sub-domains have their own idle-states independent of the parent

Documentation/devicetree/bindings/power/rockchip-io-domain.txt

@@ -33,6 +33,7 @@ Required properties:
 - compatible: should be one of:
   - "rockchip,rk3188-io-voltage-domain" for rk3188
   - "rockchip,rk3288-io-voltage-domain" for rk3288
+  - "rockchip,rk3328-io-voltage-domain" for rk3328
   - "rockchip,rk3368-io-voltage-domain" for rk3368
   - "rockchip,rk3368-pmu-io-voltage-domain" for rk3368 pmu-domains
   - "rockchip,rk3399-io-voltage-domain" for rk3399

Documentation/power/runtime_pm.txt

@@ -478,15 +478,23 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
     - set the power.last_busy field to the current time
 
   void pm_runtime_use_autosuspend(struct device *dev);
-    - set the power.use_autosuspend flag, enabling autosuspend delays
+    - set the power.use_autosuspend flag, enabling autosuspend delays; call
+      pm_runtime_get_sync if the flag was previously cleared and
+      power.autosuspend_delay is negative
 
   void pm_runtime_dont_use_autosuspend(struct device *dev);
-    - clear the power.use_autosuspend flag, disabling autosuspend delays
+    - clear the power.use_autosuspend flag, disabling autosuspend delays;
+      decrement the device's usage counter if the flag was previously set and
+      power.autosuspend_delay is negative; call pm_runtime_idle
 
   void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
     - set the power.autosuspend_delay value to 'delay' (expressed in
       milliseconds); if 'delay' is negative then runtime suspends are
-      prevented
+      prevented; if power.use_autosuspend is set, pm_runtime_get_sync may be
+      called or the device's usage counter may be decremented and
+      pm_runtime_idle called depending on if power.autosuspend_delay is
+      changed to or from a negative value; if power.use_autosuspend is clear,
+      pm_runtime_idle is called
 
   unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
     - calculate the time when the current autosuspend delay period will expire,
@@ -836,9 +844,8 @@ of the non-autosuspend counterparts:
 	Instead of: pm_runtime_put_sync   use: pm_runtime_put_sync_autosuspend.
 
 Drivers may also continue to use the non-autosuspend helper functions; they
-will behave normally, not taking the autosuspend delay into account.
-Similarly, if the power.use_autosuspend field isn't set then the autosuspend
-helper functions will behave just like the non-autosuspend counterparts.
+will behave normally, which means sometimes taking the autosuspend delay into
+account (see pm_runtime_idle).
 
 Under some circumstances a driver or subsystem may want to prevent a device
 from autosuspending immediately, even though the usage counter is zero and the

MAINTAINERS

@@ -3471,6 +3471,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
 T:	git git://git.linaro.org/people/vireshk/linux.git (For ARM Updates)
 B:	https://bugzilla.kernel.org
 F:	Documentation/cpu-freq/
+F:	Documentation/devicetree/bindings/cpufreq/
 F:	drivers/cpufreq/
 F:	include/linux/cpufreq.h
 F:	tools/testing/selftests/cpufreq/

arch/arm/boot/dts/ste-dbx5x0.dtsi

@@ -1189,11 +1189,6 @@ external-bus@50000000 {
 			status = "disabled";
 		};
 
-		cpufreq-cooling {
-			compatible = "stericsson,db8500-cpufreq-cooling";
-			status = "disabled";
-		};
-
 		mcde@a0350000 {
 			compatible = "stericsson,mcde";
 			reg = <0xa0350000 0x1000>, /* MCDE */

drivers/base/power/domain.c

@@ -121,7 +121,9 @@ static const struct genpd_lock_ops genpd_spin_ops = {
 #define genpd_lock_interruptible(p)	p->lock_ops->lock_interruptible(p)
 #define genpd_unlock(p)			p->lock_ops->unlock(p)
 
+#define genpd_status_on(genpd)		(genpd->status == GPD_STATE_ACTIVE)
 #define genpd_is_irq_safe(genpd)	(genpd->flags & GENPD_FLAG_IRQ_SAFE)
+#define genpd_is_always_on(genpd)	(genpd->flags & GENPD_FLAG_ALWAYS_ON)
 
 static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
 		struct generic_pm_domain *genpd)
@@ -130,8 +132,12 @@ static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
 
 	ret = pm_runtime_is_irq_safe(dev) && !genpd_is_irq_safe(genpd);
 
-	/* Warn once if IRQ safe dev in no sleep domain */
-	if (ret)
+	/*
+	 * Warn once if an IRQ safe device is attached to a no sleep domain, as
+	 * to indicate a suboptimal configuration for PM. For an always on
+	 * domain this isn't case, thus don't warn.
+	 */
+	if (ret && !genpd_is_always_on(genpd))
 		dev_warn_once(dev, "PM domain %s will not be powered off\n",
 				genpd->name);
 
@@ -296,11 +302,15 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
 	 * (1) The domain is already in the "power off" state.
 	 * (2) System suspend is in progress.
 	 */
-	if (genpd->status == GPD_STATE_POWER_OFF
-	    || genpd->prepared_count > 0)
+	if (!genpd_status_on(genpd) || genpd->prepared_count > 0)
 		return 0;
 
-	if (atomic_read(&genpd->sd_count) > 0)
+	/*
+	 * Abort power off for the PM domain in the following situations:
+	 * (1) The domain is configured as always on.
+	 * (2) When the domain has a subdomain being powered on.
+	 */
+	if (genpd_is_always_on(genpd) || atomic_read(&genpd->sd_count) > 0)
 		return -EBUSY;
 
 	list_for_each_entry(pdd, &genpd->dev_list, list_node) {
@@ -373,7 +383,7 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth)
 	struct gpd_link *link;
 	int ret = 0;
 
-	if (genpd->status == GPD_STATE_ACTIVE)
+	if (genpd_status_on(genpd))
 		return 0;
 
 	/*
@@ -752,7 +762,7 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock,
 {
 	struct gpd_link *link;
 
-	if (genpd->status == GPD_STATE_POWER_OFF)
+	if (!genpd_status_on(genpd) || genpd_is_always_on(genpd))
 		return;
 
 	if (genpd->suspended_count != genpd->device_count
@@ -761,7 +771,8 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock,
 
 	/* Choose the deepest state when suspending */
 	genpd->state_idx = genpd->state_count - 1;
-	_genpd_power_off(genpd, false);
+	if (_genpd_power_off(genpd, false))
+		return;
 
 	genpd->status = GPD_STATE_POWER_OFF;
 
@@ -793,7 +804,7 @@ static void genpd_sync_power_on(struct generic_pm_domain *genpd, bool use_lock,
 {
 	struct gpd_link *link;
 
-	if (genpd->status == GPD_STATE_ACTIVE)
+	if (genpd_status_on(genpd))
 		return;
 
 	list_for_each_entry(link, &genpd->slave_links, slave_node) {
@@ -1329,8 +1340,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd,
 	genpd_lock(subdomain);
 	genpd_lock_nested(genpd, SINGLE_DEPTH_NESTING);
 
-	if (genpd->status == GPD_STATE_POWER_OFF
-	    &&  subdomain->status != GPD_STATE_POWER_OFF) {
+	if (!genpd_status_on(genpd) && genpd_status_on(subdomain)) {
 		ret = -EINVAL;
 		goto out;
 	}
@@ -1346,7 +1356,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd,
 	list_add_tail(&link->master_node, &genpd->master_links);
 	link->slave = subdomain;
 	list_add_tail(&link->slave_node, &subdomain->slave_links);
-	if (subdomain->status != GPD_STATE_POWER_OFF)
+	if (genpd_status_on(subdomain))
 		genpd_sd_counter_inc(genpd);
 
  out:
@@ -1406,7 +1416,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
 		list_del(&link->master_node);
 		list_del(&link->slave_node);
 		kfree(link);
-		if (subdomain->status != GPD_STATE_POWER_OFF)
+		if (genpd_status_on(subdomain))
 			genpd_sd_counter_dec(genpd);
 
 		ret = 0;
@@ -1492,6 +1502,10 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 		genpd->dev_ops.start = pm_clk_resume;
 	}
 
+	/* Always-on domains must be powered on at initialization. */
+	if (genpd_is_always_on(genpd) && !genpd_status_on(genpd))
+		return -EINVAL;
+
 	/* Use only one "off" state if there were no states declared */
 	if (genpd->state_count == 0) {
 		ret = genpd_set_default_power_state(genpd);
@@ -1700,12 +1714,12 @@ int of_genpd_add_provider_simple(struct device_node *np,
 
 	mutex_lock(&gpd_list_lock);
 
-	if (pm_genpd_present(genpd))
+	if (pm_genpd_present(genpd)) {
 		ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
-
-	if (!ret) {
-		genpd->provider = &np->fwnode;
-		genpd->has_provider = true;
+		if (!ret) {
+			genpd->provider = &np->fwnode;
+			genpd->has_provider = true;
+		}
 	}
 
 	mutex_unlock(&gpd_list_lock);
@@ -2079,11 +2093,6 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state,
 	int err;
 	u32 residency;
 	u32 entry_latency, exit_latency;
-	const struct of_device_id *match_id;
-
-	match_id = of_match_node(idle_state_match, state_node);
-	if (!match_id)
-		return -EINVAL;
 
 	err = of_property_read_u32(state_node, "entry-latency-us",
 						&entry_latency);
@@ -2132,6 +2141,7 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 	int err, ret;
 	int count;
 	struct of_phandle_iterator it;
+	const struct of_device_id *match_id;
 
 	count = of_count_phandle_with_args(dn, "domain-idle-states", NULL);
 	if (count <= 0)
@@ -2144,6 +2154,9 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 	/* Loop over the phandles until all the requested entry is found */
 	of_for_each_phandle(&it, err, dn, "domain-idle-states", NULL, 0) {
 		np = it.node;
+		match_id = of_match_node(idle_state_match, np);
+		if (!match_id)
+			continue;
 		ret = genpd_parse_state(&st[i++], np);
 		if (ret) {
 			pr_err
@@ -2155,8 +2168,11 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 		}
 	}
 
-	*n = count;
-	*states = st;
+	*n = i;
+	if (!i)
+		kfree(st);
+	else
+		*states = st;
 
 	return 0;
 }
@@ -2221,7 +2237,7 @@ static int pm_genpd_summary_one(struct seq_file *s,
 
 	if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup)))
 		goto exit;
-	if (genpd->status == GPD_STATE_POWER_OFF)
+	if (!genpd_status_on(genpd))
 		snprintf(state, sizeof(state), "%s-%u",
 			 status_lookup[genpd->status], genpd->state_idx);
 	else

drivers/cpufreq/Kconfig.arm

@@ -247,6 +247,12 @@ config ARM_TEGRA124_CPUFREQ
 	help
 	  This adds the CPUFreq driver support for Tegra124 SOCs.
 
+config ARM_TEGRA186_CPUFREQ
+	tristate "Tegra186 CPUFreq support"
+	depends on ARCH_TEGRA && TEGRA_BPMP
+	help
+	  This adds the CPUFreq driver support for Tegra186 SOCs.
+
 config ARM_TI_CPUFREQ
 	bool "Texas Instruments CPUFreq support"
 	depends on ARCH_OMAP2PLUS

drivers/cpufreq/Makefile

@@ -77,6 +77,7 @@ obj-$(CONFIG_ARM_SPEAR_CPUFREQ)		+= spear-cpufreq.o
 obj-$(CONFIG_ARM_STI_CPUFREQ)		+= sti-cpufreq.o
 obj-$(CONFIG_ARM_TEGRA20_CPUFREQ)	+= tegra20-cpufreq.o
 obj-$(CONFIG_ARM_TEGRA124_CPUFREQ)	+= tegra124-cpufreq.o
+obj-$(CONFIG_ARM_TEGRA186_CPUFREQ)	+= tegra186-cpufreq.o
 obj-$(CONFIG_ARM_TI_CPUFREQ)		+= ti-cpufreq.o
 obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ)	+= vexpress-spc-cpufreq.o
 obj-$(CONFIG_ACPI_CPPC_CPUFREQ) += cppc_cpufreq.o

drivers/cpufreq/dbx500-cpufreq.c

@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/cpufreq.h>
+#include <linux/cpu_cooling.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
@@ -18,6 +19,7 @@
 
 static struct cpufreq_frequency_table *freq_table;
 static struct clk *armss_clk;
+static struct thermal_cooling_device *cdev;
 
 static int dbx500_cpufreq_target(struct cpufreq_policy *policy,
 				unsigned int index)
@@ -32,6 +34,22 @@ static int dbx500_cpufreq_init(struct cpufreq_policy *policy)
 	return cpufreq_generic_init(policy, freq_table, 20 * 1000);
 }
 
+static int dbx500_cpufreq_exit(struct cpufreq_policy *policy)
+{
+	if (!IS_ERR(cdev))
+		cpufreq_cooling_unregister(cdev);
+	return 0;
+}
+
+static void dbx500_cpufreq_ready(struct cpufreq_policy *policy)
+{
+	cdev = cpufreq_cooling_register(policy->cpus);
+	if (IS_ERR(cdev))
+		pr_err("Failed to register cooling device %ld\n", PTR_ERR(cdev));
+	else
+		pr_info("Cooling device registered: %s\n", cdev->type);
+}
+
 static struct cpufreq_driver dbx500_cpufreq_driver = {
 	.flags  = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS |
 			CPUFREQ_NEED_INITIAL_FREQ_CHECK,
@@ -39,6 +57,8 @@ static struct cpufreq_driver dbx500_cpufreq_driver = {
 	.target_index = dbx500_cpufreq_target,
 	.get    = cpufreq_generic_get,
 	.init   = dbx500_cpufreq_init,
+	.exit  = dbx500_cpufreq_exit,
+	.ready  = dbx500_cpufreq_ready,
 	.name   = "DBX500",
 	.attr   = cpufreq_generic_attr,
 };

drivers/cpufreq/imx6q-cpufreq.c

@@ -161,8 +161,13 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 
 static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
 {
+	int ret;
+
 	policy->clk = arm_clk;
-	return cpufreq_generic_init(policy, freq_table, transition_latency);
+	ret = cpufreq_generic_init(policy, freq_table, transition_latency);
+	policy->suspend_freq = policy->max;
+
+	return ret;
 }
 
 static struct cpufreq_driver imx6q_cpufreq_driver = {
@@ -173,6 +178,7 @@ static struct cpufreq_driver imx6q_cpufreq_driver = {
 	.init = imx6q_cpufreq_init,
 	.name = "imx6q-cpufreq",
 	.attr = cpufreq_generic_attr,
+	.suspend = cpufreq_generic_suspend,
 };
 
 static int imx6q_cpufreq_probe(struct platform_device *pdev)
@@ -222,6 +228,13 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 	arm_reg = regulator_get(cpu_dev, "arm");
 	pu_reg = regulator_get_optional(cpu_dev, "pu");
 	soc_reg = regulator_get(cpu_dev, "soc");
+	if (PTR_ERR(arm_reg) == -EPROBE_DEFER ||
+			PTR_ERR(soc_reg) == -EPROBE_DEFER ||
+			PTR_ERR(pu_reg) == -EPROBE_DEFER) {
+		ret = -EPROBE_DEFER;
+		dev_dbg(cpu_dev, "regulators not ready, defer\n");
+		goto put_reg;
+	}
 	if (IS_ERR(arm_reg) || IS_ERR(soc_reg)) {
 		dev_err(cpu_dev, "failed to get regulators\n");
 		ret = -ENOENT;
@@ -255,7 +268,7 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
 	if (ret) {
 		dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret);
-		goto put_reg;
+		goto out_free_opp;
 	}
 
 	/* Make imx6_soc_volt array's size same as arm opp number */

drivers/cpufreq/mt8173-cpufreq.c

@@ -573,14 +573,33 @@ static struct platform_driver mt8173_cpufreq_platdrv = {
 	.probe		= mt8173_cpufreq_probe,
 };
 
-static int mt8173_cpufreq_driver_init(void)
+/* List of machines supported by this driver */
+static const struct of_device_id mt8173_cpufreq_machines[] __initconst = {
+	{ .compatible = "mediatek,mt817x", },
+	{ .compatible = "mediatek,mt8173", },
+	{ .compatible = "mediatek,mt8176", },
+
+	{ }
+};
+
+static int __init mt8173_cpufreq_driver_init(void)
 {
+	struct device_node *np;
+	const struct of_device_id *match;
 	struct platform_device *pdev;
 	int err;
 
-	if (!of_machine_is_compatible("mediatek,mt8173"))
+	np = of_find_node_by_path("/");
+	if (!np)
 		return -ENODEV;
 
+	match = of_match_node(mt8173_cpufreq_machines, np);
+	of_node_put(np);
+	if (!match) {
+		pr_warn("Machine is not compatible with mt8173-cpufreq\n");
+		return -ENODEV;
+	}
+
 	err = platform_driver_register(&mt8173_cpufreq_platdrv);
 	if (err)
 		return err;

drivers/cpufreq/qoriq-cpufreq.c

@@ -52,17 +52,27 @@ static u32 get_bus_freq(void)
 {
 	struct device_node *soc;
 	u32 sysfreq;
+	struct clk *pltclk;
+	int ret;
 
+	/* get platform freq by searching bus-frequency property */
 	soc = of_find_node_by_type(NULL, "soc");
-	if (!soc)
-		return 0;
-
-	if (of_property_read_u32(soc, "bus-frequency", &sysfreq))
-		sysfreq = 0;
+	if (soc) {
+		ret = of_property_read_u32(soc, "bus-frequency", &sysfreq);
+		of_node_put(soc);
+		if (!ret)
+			return sysfreq;
+	}
 
-	of_node_put(soc);
+	/* get platform freq by its clock name */
+	pltclk = clk_get(NULL, "cg-pll0-div1");
+	if (IS_ERR(pltclk)) {
+		pr_err("%s: can't get bus frequency %ld\n",
+		       __func__, PTR_ERR(pltclk));
+		return PTR_ERR(pltclk);
+	}
 
-	return sysfreq;
+	return clk_get_rate(pltclk);
 }
 
 static struct clk *cpu_to_clk(int cpu)

drivers/cpufreq/tegra186-cpufreq.c

+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/cpufreq.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include <soc/tegra/bpmp.h>
+#include <soc/tegra/bpmp-abi.h>
+
+#define EDVD_CORE_VOLT_FREQ(core)		(0x20 + (core) * 0x4)
+#define EDVD_CORE_VOLT_FREQ_F_SHIFT		0
+#define EDVD_CORE_VOLT_FREQ_V_SHIFT		16
+
+struct tegra186_cpufreq_cluster_info {
+	unsigned long offset;
+	int cpus[4];
+	unsigned int bpmp_cluster_id;
+};
+
+#define NO_CPU -1
+static const struct tegra186_cpufreq_cluster_info tegra186_clusters[] = {
+	/* Denver cluster */
+	{
+		.offset = SZ_64K * 7,
+		.cpus = { 1, 2, NO_CPU, NO_CPU },
+		.bpmp_cluster_id = 0,
+	},
+	/* A57 cluster */
+	{
+		.offset = SZ_64K * 6,
+		.cpus = { 0, 3, 4, 5 },
+		.bpmp_cluster_id = 1,
+	},
+};
+
+struct tegra186_cpufreq_cluster {
+	const struct tegra186_cpufreq_cluster_info *info;
+	struct cpufreq_frequency_table *table;
+};
+
+struct tegra186_cpufreq_data {
+	void __iomem *regs;
+
+	size_t num_clusters;
+	struct tegra186_cpufreq_cluster *clusters;
+};
+
+static int tegra186_cpufreq_init(struct cpufreq_policy *policy)
+{
+	struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
+	unsigned int i;
+
+	for (i = 0; i < data->num_clusters; i++) {
+		struct tegra186_cpufreq_cluster *cluster = &data->clusters[i];
+		const struct tegra186_cpufreq_cluster_info *info =
+			cluster->info;
+		int core;
+
+		for (core = 0; core < ARRAY_SIZE(info->cpus); core++) {
+			if (info->cpus[core] == policy->cpu)
+				break;
+		}
+		if (core == ARRAY_SIZE(info->cpus))
+			continue;
+
+		policy->driver_data =
+			data->regs + info->offset + EDVD_CORE_VOLT_FREQ(core);
+		cpufreq_table_validate_and_show(policy, cluster->table);
+	}
+
+	policy->cpuinfo.transition_latency = 300 * 1000;
+
+	return 0;
+}
+
+static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
+				       unsigned int index)
+{
+	struct cpufreq_frequency_table *tbl = policy->freq_table + index;
+	void __iomem *edvd_reg = policy->driver_data;
+	u32 edvd_val = tbl->driver_data;
+
+	writel(edvd_val, edvd_reg);
+
+	return 0;
+}
+
+static struct cpufreq_driver tegra186_cpufreq_driver = {
+	.name = "tegra186",
+	.flags = CPUFREQ_STICKY | CPUFREQ_HAVE_GOVERNOR_PER_POLICY,
+	.verify = cpufreq_generic_frequency_table_verify,
+	.target_index = tegra186_cpufreq_set_target,
+	.init = tegra186_cpufreq_init,
+	.attr = cpufreq_generic_attr,
+};
+
+static struct cpufreq_frequency_table *init_vhint_table(
+	struct platform_device *pdev, struct tegra_bpmp *bpmp,
+	unsigned int cluster_id)
+{
+	struct cpufreq_frequency_table *table;
+	struct mrq_cpu_vhint_request req;
+	struct tegra_bpmp_message msg;
+	struct cpu_vhint_data *data;
+	int err, i, j, num_rates = 0;
+	dma_addr_t phys;
+	void *virt;
+
+	virt = dma_alloc_coherent(bpmp->dev, sizeof(*data), &phys,
+				  GFP_KERNEL | GFP_DMA32);
+	if (!virt)
+		return ERR_PTR(-ENOMEM);
+
+	data = (struct cpu_vhint_data *)virt;
+
+	memset(&req, 0, sizeof(req));
+	req.addr = phys;
+	req.cluster_id = cluster_id;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.mrq = MRQ_CPU_VHINT;
+	msg.tx.data = &req;
+	msg.tx.size = sizeof(req);
+
+	err = tegra_bpmp_transfer(bpmp, &msg);
+	if (err) {
+		table = ERR_PTR(err);
+		goto free;
+	}
+
+	for (i = data->vfloor; i <= data->vceil; i++) {
+		u16 ndiv = data->ndiv[i];
+
+		if (ndiv < data->ndiv_min || ndiv > data->ndiv_max)
+			continue;
+
+		/* Only store lowest voltage index for each rate */
+		if (i > 0 && ndiv == data->ndiv[i - 1])
+			continue;
+
+		num_rates++;
+	}
+
+	table = devm_kcalloc(&pdev->dev, num_rates + 1, sizeof(*table),
+			     GFP_KERNEL);
+	if (!table) {
+		table = ERR_PTR(-ENOMEM);
+		goto free;
+	}
+
+	for (i = data->vfloor, j = 0; i <= data->vceil; i++) {
+		struct cpufreq_frequency_table *point;
+		u16 ndiv = data->ndiv[i];
+		u32 edvd_val = 0;
+
+		if (ndiv < data->ndiv_min || ndiv > data->ndiv_max)
+			continue;
+
+		/* Only store lowest voltage index for each rate */
+		if (i > 0 && ndiv == data->ndiv[i - 1])
+			continue;
+
+		edvd_val |= i << EDVD_CORE_VOLT_FREQ_V_SHIFT;
+		edvd_val |= ndiv << EDVD_CORE_VOLT_FREQ_F_SHIFT;
+
+		point = &table[j++];
+		point->driver_data = edvd_val;
+		point->frequency = data->ref_clk_hz * ndiv / data->pdiv /
+			data->mdiv / 1000;
+	}
+
+	table[j].frequency = CPUFREQ_TABLE_END;
+
+free:
+	dma_free_coherent(bpmp->dev, sizeof(*data), virt, phys);
+
+	return table;
+}
+
+static int tegra186_cpufreq_probe(struct platform_device *pdev)
+{
+	struct tegra186_cpufreq_data *data;
+	struct tegra_bpmp *bpmp;
+	struct resource *res;
+	unsigned int i = 0, err;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->clusters = devm_kcalloc(&pdev->dev, ARRAY_SIZE(tegra186_clusters),
+				      sizeof(*data->clusters), GFP_KERNEL);
+	if (!data->clusters)
+		return -ENOMEM;
+
+	data->num_clusters = ARRAY_SIZE(tegra186_clusters);
+
+	bpmp = tegra_bpmp_get(&pdev->dev);
+	if (IS_ERR(bpmp))
+		return PTR_ERR(bpmp);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	data->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(data->regs)) {
+		err = PTR_ERR(data->regs);
+		goto put_bpmp;
+	}
+
+	for (i = 0; i < data->num_clusters; i++) {
+		struct tegra186_cpufreq_cluster *cluster = &data->clusters[i];
+
+		cluster->info = &tegra186_clusters[i];
+		cluster->table = init_vhint_table(
+			pdev, bpmp, cluster->info->bpmp_cluster_id);
+		if (IS_ERR(cluster->table)) {
+			err = PTR_ERR(cluster->table);
+			goto put_bpmp;
+		}
+	}
+
+	tegra_bpmp_put(bpmp);
+
+	tegra186_cpufreq_driver.driver_data = data;
+
+	err = cpufreq_register_driver(&tegra186_cpufreq_driver);
+	if (err)
+		return err;
+
+	return 0;
+
+put_bpmp:
+	tegra_bpmp_put(bpmp);
+
+	return err;
+}
+
+static int tegra186_cpufreq_remove(struct platform_device *pdev)
+{
+	cpufreq_unregister_driver(&tegra186_cpufreq_driver);
+
+	return 0;
+}
+
+static const struct of_device_id tegra186_cpufreq_of_match[] = {
+	{ .compatible = "nvidia,tegra186-ccplex-cluster", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tegra186_cpufreq_of_match);
+
+static struct platform_driver tegra186_cpufreq_platform_driver = {
+	.driver = {
+		.name = "tegra186-cpufreq",
+		.of_match_table = tegra186_cpufreq_of_match,
+	},
+	.probe = tegra186_cpufreq_probe,
+	.remove = tegra186_cpufreq_remove,
+};
+module_platform_driver(tegra186_cpufreq_platform_driver);
+
+MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra186 cpufreq driver");
+MODULE_LICENSE("GPL v2");

drivers/cpuidle/cpuidle-cps.c

@@ -118,7 +118,7 @@ static void __init cps_cpuidle_unregister(void)
 
 static int __init cps_cpuidle_init(void)
 {
-	int err, cpu, core, i;
+	int err, cpu, i;
 	struct cpuidle_device *device;
 
 	/* Detect supported states */
@@ -160,7 +160,6 @@ static int __init cps_cpuidle_init(void)
 	}
 
 	for_each_possible_cpu(cpu) {
-		core = cpu_data[cpu].core;
 		device = &per_cpu(cpuidle_dev, cpu);
 		device->cpu = cpu;
 #ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED

drivers/cpuidle/cpuidle-powernv.c

@@ -56,10 +56,9 @@ static int snooze_loop(struct cpuidle_device *dev,
 
 	snooze_exit_time = get_tb() + snooze_timeout;
 	ppc64_runlatch_off();
+	HMT_very_low();
 	while (!need_resched()) {
-		HMT_low();
-		HMT_very_low();
-		if (snooze_timeout_en && get_tb() > snooze_exit_time)
+		if (likely(snooze_timeout_en) && get_tb() > snooze_exit_time)
 			break;
 	}
 
@@ -215,11 +214,25 @@ static inline void add_powernv_state(int index, const char *name,
 	stop_psscr_table[index].mask = psscr_mask;
 }
 
+/*
+ * Returns 0 if prop1_len == prop2_len. Else returns -1
+ */
+static inline int validate_dt_prop_sizes(const char *prop1, int prop1_len,
+					 const char *prop2, int prop2_len)
+{
+	if (prop1_len == prop2_len)
+		return 0;
+
+	pr_warn("cpuidle-powernv: array sizes don't match for %s and %s\n",
+		prop1, prop2);
+	return -1;
+}
+
 static int powernv_add_idle_states(void)
 {
 	struct device_node *power_mgt;
 	int nr_idle_states = 1; /* Snooze */
-	int dt_idle_states;
+	int dt_idle_states, count;
 	u32 latency_ns[CPUIDLE_STATE_MAX];
 	u32 residency_ns[CPUIDLE_STATE_MAX];
 	u32 flags[CPUIDLE_STATE_MAX];
@@ -244,6 +257,21 @@ static int powernv_add_idle_states(void)
 		goto out;
 	}
 
+	count = of_property_count_u32_elems(power_mgt,
+					    "ibm,cpu-idle-state-latencies-ns");
+
+	if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags", dt_idle_states,
+				   "ibm,cpu-idle-state-latencies-ns",
+				   count) != 0)
+		goto out;
+
+	count = of_property_count_strings(power_mgt,
+					  "ibm,cpu-idle-state-names");
+	if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags", dt_idle_states,
+				   "ibm,cpu-idle-state-names",
+				   count) != 0)
+		goto out;
+
 	/*
 	 * Since snooze is used as first idle state, max idle states allowed is
 	 * CPUIDLE_STATE_MAX -1
@@ -278,6 +306,22 @@ static int powernv_add_idle_states(void)
 	has_stop_states = (flags[0] &
 			   (OPAL_PM_STOP_INST_FAST | OPAL_PM_STOP_INST_DEEP));
 	if (has_stop_states) {
+		count = of_property_count_u64_elems(power_mgt,
+						    "ibm,cpu-idle-state-psscr");
+		if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags",
+					   dt_idle_states,
+					   "ibm,cpu-idle-state-psscr",
+					   count) != 0)
+			goto out;
+
+		count = of_property_count_u64_elems(power_mgt,
+						    "ibm,cpu-idle-state-psscr-mask");
+		if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags",
+					   dt_idle_states,
+					   "ibm,cpu-idle-state-psscr-mask",
+					   count) != 0)
+			goto out;
+
 		if (of_property_read_u64_array(power_mgt,
 		    "ibm,cpu-idle-state-psscr", psscr_val, dt_idle_states)) {
 			pr_warn("cpuidle-powernv: missing ibm,cpu-idle-state-psscr in DT\n");
@@ -292,8 +336,21 @@ static int powernv_add_idle_states(void)
 		}
 	}
 
-	rc = of_property_read_u32_array(power_mgt,
-		"ibm,cpu-idle-state-residency-ns", residency_ns, dt_idle_states);
+	count = of_property_count_u32_elems(power_mgt,
+					    "ibm,cpu-idle-state-residency-ns");
+
+	if (count < 0) {
+		rc = count;
+	} else if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags",
+					  dt_idle_states,
+					  "ibm,cpu-idle-state-residency-ns",
+					  count) != 0) {
+		goto out;
+	} else {
+		rc = of_property_read_u32_array(power_mgt,
+						"ibm,cpu-idle-state-residency-ns",
+						residency_ns, dt_idle_states);
+	}
 
 	for (i = 0; i < dt_idle_states; i++) {
 		unsigned int exit_latency, target_residency;

drivers/devfreq/governor.h

@@ -25,6 +25,35 @@
 #define DEVFREQ_GOV_SUSPEND			0x4
 #define DEVFREQ_GOV_RESUME			0x5
 
+/**
+ * struct devfreq_governor - Devfreq policy governor
+ * @node:		list node - contains registered devfreq governors
+ * @name:		Governor's name
+ * @immutable:		Immutable flag for governor. If the value is 1,
+ *			this govenror is never changeable to other governor.
+ * @get_target_freq:	Returns desired operating frequency for the device.
+ *			Basically, get_target_freq will run
+ *			devfreq_dev_profile.get_dev_status() to get the
+ *			status of the device (load = busy_time / total_time).
+ *			If no_central_polling is set, this callback is called
+ *			only with update_devfreq() notified by OPP.
+ * @event_handler:      Callback for devfreq core framework to notify events
+ *                      to governors. Events include per device governor
+ *                      init and exit, opp changes out of devfreq, suspend
+ *                      and resume of per device devfreq during device idle.
+ *
+ * Note that the callbacks are called with devfreq->lock locked by devfreq.
+ */
+struct devfreq_governor {
+	struct list_head node;
+
+	const char name[DEVFREQ_NAME_LEN];
+	const unsigned int immutable;
+	int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
+	int (*event_handler)(struct devfreq *devfreq,
+				unsigned int event, void *data);
+};
+
 /* Caution: devfreq->lock must be locked before calling update_devfreq */
 extern int update_devfreq(struct devfreq *devfreq);
 

drivers/power/avs/rockchip-io-domain.c

@@ -43,6 +43,10 @@
 #define RK3288_SOC_CON2_FLASH0		BIT(7)
 #define RK3288_SOC_FLASH_SUPPLY_NUM	2
 
+#define RK3328_SOC_CON4			0x410
+#define RK3328_SOC_CON4_VCCIO2		BIT(7)
+#define RK3328_SOC_VCCIO2_SUPPLY_NUM	1
+
 #define RK3368_SOC_CON15		0x43c
 #define RK3368_SOC_CON15_FLASH0		BIT(14)
 #define RK3368_SOC_FLASH_SUPPLY_NUM	2
@@ -166,6 +170,25 @@ static void rk3288_iodomain_init(struct rockchip_iodomain *iod)
 		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
 }
 
+static void rk3328_iodomain_init(struct rockchip_iodomain *iod)
+{
+	int ret;
+	u32 val;
+
+	/* if no vccio2 supply we should leave things alone */
+	if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg)
+		return;
+
+	/*
+	 * set vccio2 iodomain to also use this framework
+	 * instead of a special gpio.
+	 */
+	val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16);
+	ret = regmap_write(iod->grf, RK3328_SOC_CON4, val);
+	if (ret < 0)
+		dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n");
+}
+
 static void rk3368_iodomain_init(struct rockchip_iodomain *iod)
 {
 	int ret;
@@ -247,6 +270,20 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
 	.init = rk3288_iodomain_init,
 };
 
+static const struct rockchip_iodomain_soc_data soc_data_rk3328 = {
+	.grf_offset = 0x410,
+	.supply_names = {
+		"vccio1",
+		"vccio2",
+		"vccio3",
+		"vccio4",
+		"vccio5",
+		"vccio6",
+		"pmuio",
+	},
+	.init = rk3328_iodomain_init,
+};
+
 static const struct rockchip_iodomain_soc_data soc_data_rk3368 = {
 	.grf_offset = 0x900,
 	.supply_names = {
@@ -311,6 +348,10 @@ static const struct of_device_id rockchip_iodomain_match[] = {
 		.compatible = "rockchip,rk3288-io-voltage-domain",
 		.data = (void *)&soc_data_rk3288
 	},
+	{
+		.compatible = "rockchip,rk3328-io-voltage-domain",
+		.data = (void *)&soc_data_rk3328
+	},
 	{
 		.compatible = "rockchip,rk3368-io-voltage-domain",
 		.data = (void *)&soc_data_rk3368

drivers/thermal/Kconfig

@@ -291,18 +291,6 @@ config ARMADA_THERMAL
 	  Enable this option if you want to have support for thermal management
 	  controller present in Armada 370 and Armada XP SoC.
 
-config DB8500_CPUFREQ_COOLING
-	tristate "DB8500 cpufreq cooling"
-	depends on ARCH_U8500 || COMPILE_TEST
-	depends on HAS_IOMEM
-	depends on CPU_THERMAL
-	default y
-	help
-	  Adds DB8500 cpufreq cooling devices, and these cooling devices can be
-	  bound to thermal zone trip points. When a trip point reached, the
-	  bound cpufreq cooling device turns active to set CPU frequency low to
-	  cool down the CPU.
-
 config INTEL_POWERCLAMP
 	tristate "Intel PowerClamp idle injection driver"
 	depends on THERMAL

drivers/thermal/Makefile

@@ -41,7 +41,6 @@ obj-$(CONFIG_TANGO_THERMAL)	+= tango_thermal.o
 obj-$(CONFIG_IMX_THERMAL)	+= imx_thermal.o
 obj-$(CONFIG_MAX77620_THERMAL)	+= max77620_thermal.o
 obj-$(CONFIG_QORIQ_THERMAL)	+= qoriq_thermal.o
-obj-$(CONFIG_DB8500_CPUFREQ_COOLING)	+= db8500_cpufreq_cooling.o
 obj-$(CONFIG_INTEL_POWERCLAMP)	+= intel_powerclamp.o
 obj-$(CONFIG_X86_PKG_TEMP_THERMAL)	+= x86_pkg_temp_thermal.o
 obj-$(CONFIG_INTEL_SOC_DTS_IOSF_CORE)	+= intel_soc_dts_iosf.o

drivers/thermal/db8500_cpufreq_cooling.c

-/*
- * db8500_cpufreq_cooling.c - DB8500 cpufreq works as cooling device.
- *
- * Copyright (C) 2012 ST-Ericsson
- * Copyright (C) 2012 Linaro Ltd.
- *
- * Author: Hongbo Zhang <hongbo.zhang@linaro.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/cpu_cooling.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-static int db8500_cpufreq_cooling_probe(struct platform_device *pdev)
-{
-	struct thermal_cooling_device *cdev;
-
-	cdev = cpufreq_cooling_register(cpu_present_mask);
-	if (IS_ERR(cdev)) {
-		int ret = PTR_ERR(cdev);
-
-		if (ret != -EPROBE_DEFER)
-			dev_err(&pdev->dev,
-				"Failed to register cooling device %d\n",
-				ret);
-				
-		return ret;
-	}
-
-	platform_set_drvdata(pdev, cdev);
-
-	dev_info(&pdev->dev, "Cooling device registered: %s\n",	cdev->type);
-
-	return 0;
-}
-
-static int db8500_cpufreq_cooling_remove(struct platform_device *pdev)
-{
-	struct thermal_cooling_device *cdev = platform_get_drvdata(pdev);
-
-	cpufreq_cooling_unregister(cdev);
-
-	return 0;
-}
-
-static int db8500_cpufreq_cooling_suspend(struct platform_device *pdev,
-		pm_message_t state)
-{
-	return -ENOSYS;
-}
-
-static int db8500_cpufreq_cooling_resume(struct platform_device *pdev)
-{
-	return -ENOSYS;
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id db8500_cpufreq_cooling_match[] = {
-	{ .compatible = "stericsson,db8500-cpufreq-cooling" },
-	{},
-};
-MODULE_DEVICE_TABLE(of, db8500_cpufreq_cooling_match);
-#endif
-
-static struct platform_driver db8500_cpufreq_cooling_driver = {
-	.driver = {
-		.name = "db8500-cpufreq-cooling",
-		.of_match_table = of_match_ptr(db8500_cpufreq_cooling_match),
-	},
-	.probe = db8500_cpufreq_cooling_probe,
-	.suspend = db8500_cpufreq_cooling_suspend,
-	.resume = db8500_cpufreq_cooling_resume,
-	.remove = db8500_cpufreq_cooling_remove,
-};
-
-static int __init db8500_cpufreq_cooling_init(void)
-{
-	return platform_driver_register(&db8500_cpufreq_cooling_driver);
-}
-
-static void __exit db8500_cpufreq_cooling_exit(void)
-{
-	platform_driver_unregister(&db8500_cpufreq_cooling_driver);
-}
-
-/* Should be later than db8500_cpufreq_register */
-late_initcall(db8500_cpufreq_cooling_init);
-module_exit(db8500_cpufreq_cooling_exit);
-
-MODULE_AUTHOR("Hongbo Zhang <hongbo.zhang@stericsson.com>");
-MODULE_DESCRIPTION("DB8500 cpufreq cooling driver");
-MODULE_LICENSE("GPL");

include/linux/cpufreq.h

@@ -120,6 +120,13 @@ struct cpufreq_policy {
 	bool			fast_switch_possible;
 	bool			fast_switch_enabled;
 
+	/*
+	 * Preferred average time interval between consecutive invocations of
+	 * the driver to set the frequency for this policy.  To be set by the
+	 * scaling driver (0, which is the default, means no preference).
+	 */
+	unsigned int		transition_delay_us;
+
 	 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
 	unsigned int cached_target_freq;
 	int cached_resolved_idx;

include/linux/devfreq.h

@@ -27,6 +27,7 @@
 #define DEVFREQ_POSTCHANGE		(1)
 
 struct devfreq;
+struct devfreq_governor;
 
 /**
  * struct devfreq_dev_status - Data given from devfreq user device to
@@ -100,35 +101,6 @@ struct devfreq_dev_profile {
 	unsigned int max_state;
 };
 
-/**
- * struct devfreq_governor - Devfreq policy governor
- * @node:		list node - contains registered devfreq governors
- * @name:		Governor's name
- * @immutable:		Immutable flag for governor. If the value is 1,
- *			this govenror is never changeable to other governor.
- * @get_target_freq:	Returns desired operating frequency for the device.
- *			Basically, get_target_freq will run
- *			devfreq_dev_profile.get_dev_status() to get the
- *			status of the device (load = busy_time / total_time).
- *			If no_central_polling is set, this callback is called
- *			only with update_devfreq() notified by OPP.
- * @event_handler:      Callback for devfreq core framework to notify events
- *                      to governors. Events include per device governor
- *                      init and exit, opp changes out of devfreq, suspend
- *                      and resume of per device devfreq during device idle.
- *
- * Note that the callbacks are called with devfreq->lock locked by devfreq.
- */
-struct devfreq_governor {
-	struct list_head node;
-
-	const char name[DEVFREQ_NAME_LEN];
-	const unsigned int immutable;
-	int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
-	int (*event_handler)(struct devfreq *devfreq,
-				unsigned int event, void *data);
-};
-
 /**
  * struct devfreq - Device devfreq structure
  * @node:	list node - contains the devices with devfreq that have been

include/linux/pm_domain.h

@@ -20,6 +20,7 @@
 /* Defines used for the flags field in the struct generic_pm_domain */
 #define GENPD_FLAG_PM_CLK	(1U << 0) /* PM domain uses PM clk */
 #define GENPD_FLAG_IRQ_SAFE	(1U << 1) /* PM domain operates in atomic */
+#define GENPD_FLAG_ALWAYS_ON	(1U << 2) /* PM domain is always powered on */
 
 enum gpd_status {
 	GPD_STATE_ACTIVE = 0,	/* PM domain is active */

include/linux/tick.h

@@ -117,6 +117,7 @@ extern void tick_nohz_idle_enter(void);
 extern void tick_nohz_idle_exit(void);
 extern void tick_nohz_irq_exit(void);
 extern ktime_t tick_nohz_get_sleep_length(void);
+extern unsigned long tick_nohz_get_idle_calls(void);
 extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
 extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
 #else /* !CONFIG_NO_HZ_COMMON */

kernel/sched/cpufreq_schedutil.c

@@ -61,6 +61,11 @@ struct sugov_cpu {
 	unsigned long util;
 	unsigned long max;
 	unsigned int flags;
+
+	/* The field below is for single-CPU policies only. */
+#ifdef CONFIG_NO_HZ_COMMON
+	unsigned long saved_idle_calls;
+#endif
 };
 
 static DEFINE_PER_CPU(struct sugov_cpu, sugov_cpu);
@@ -93,22 +98,23 @@ static void sugov_update_commit(struct sugov_policy *sg_policy, u64 time,
 {
 	struct cpufreq_policy *policy = sg_policy->policy;
 
+	if (sg_policy->next_freq == next_freq)
+		return;
+
+	if (sg_policy->next_freq > next_freq)
+		next_freq = (sg_policy->next_freq + next_freq) >> 1;
+
+	sg_policy->next_freq = next_freq;
 	sg_policy->last_freq_update_time = time;
 
 	if (policy->fast_switch_enabled) {
-		if (sg_policy->next_freq == next_freq) {
-			trace_cpu_frequency(policy->cur, smp_processor_id());
-			return;
-		}
-		sg_policy->next_freq = next_freq;
 		next_freq = cpufreq_driver_fast_switch(policy, next_freq);
 		if (next_freq == CPUFREQ_ENTRY_INVALID)
 			return;
 
 		policy->cur = next_freq;
 		trace_cpu_frequency(next_freq, smp_processor_id());
-	} else if (sg_policy->next_freq != next_freq) {
-		sg_policy->next_freq = next_freq;
+	} else {
 		sg_policy->work_in_progress = true;
 		irq_work_queue(&sg_policy->irq_work);
 	}
@@ -192,6 +198,19 @@ static void sugov_iowait_boost(struct sugov_cpu *sg_cpu, unsigned long *util,
 	sg_cpu->iowait_boost >>= 1;
 }
 
+#ifdef CONFIG_NO_HZ_COMMON
+static bool sugov_cpu_is_busy(struct sugov_cpu *sg_cpu)
+{
+	unsigned long idle_calls = tick_nohz_get_idle_calls();
+	bool ret = idle_calls == sg_cpu->saved_idle_calls;
+
+	sg_cpu->saved_idle_calls = idle_calls;
+	return ret;
+}
+#else
+static inline bool sugov_cpu_is_busy(struct sugov_cpu *sg_cpu) { return false; }
+#endif /* CONFIG_NO_HZ_COMMON */
+
 static void sugov_update_single(struct update_util_data *hook, u64 time,
 				unsigned int flags)
 {
@@ -200,6 +219,7 @@ static void sugov_update_single(struct update_util_data *hook, u64 time,
 	struct cpufreq_policy *policy = sg_policy->policy;
 	unsigned long util, max;
 	unsigned int next_f;
+	bool busy;
 
 	sugov_set_iowait_boost(sg_cpu, time, flags);
 	sg_cpu->last_update = time;
@@ -207,40 +227,37 @@ static void sugov_update_single(struct update_util_data *hook, u64 time,
 	if (!sugov_should_update_freq(sg_policy, time))
 		return;
 
+	busy = sugov_cpu_is_busy(sg_cpu);
+
 	if (flags & SCHED_CPUFREQ_RT_DL) {
 		next_f = policy->cpuinfo.max_freq;
 	} else {
 		sugov_get_util(&util, &max);
 		sugov_iowait_boost(sg_cpu, &util, &max);
 		next_f = get_next_freq(sg_policy, util, max);
+		/*
+		 * Do not reduce the frequency if the CPU has not been idle
+		 * recently, as the reduction is likely to be premature then.
+		 */
+		if (busy && next_f < sg_policy->next_freq)
+			next_f = sg_policy->next_freq;
 	}
 	sugov_update_commit(sg_policy, time, next_f);
 }
 
-static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu,
-					   unsigned long util, unsigned long max,
-					   unsigned int flags)
+static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu)
 {
 	struct sugov_policy *sg_policy = sg_cpu->sg_policy;
 	struct cpufreq_policy *policy = sg_policy->policy;
-	unsigned int max_f = policy->cpuinfo.max_freq;
 	u64 last_freq_update_time = sg_policy->last_freq_update_time;
+	unsigned long util = 0, max = 1;
 	unsigned int j;
 
-	if (flags & SCHED_CPUFREQ_RT_DL)
-		return max_f;
-
-	sugov_iowait_boost(sg_cpu, &util, &max);
-
 	for_each_cpu(j, policy->cpus) {
-		struct sugov_cpu *j_sg_cpu;
+		struct sugov_cpu *j_sg_cpu = &per_cpu(sugov_cpu, j);
 		unsigned long j_util, j_max;
 		s64 delta_ns;
 
-		if (j == smp_processor_id())
-			continue;
-
-		j_sg_cpu = &per_cpu(sugov_cpu, j);
 		/*
 		 * If the CPU utilization was last updated before the previous
 		 * frequency update and the time elapsed between the last update
@@ -254,7 +271,7 @@ static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu,
 			continue;
 		}
 		if (j_sg_cpu->flags & SCHED_CPUFREQ_RT_DL)
-			return max_f;
+			return policy->cpuinfo.max_freq;
 
 		j_util = j_sg_cpu->util;
 		j_max = j_sg_cpu->max;
@@ -289,7 +306,11 @@ static void sugov_update_shared(struct update_util_data *hook, u64 time,
 	sg_cpu->last_update = time;
 
 	if (sugov_should_update_freq(sg_policy, time)) {
-		next_f = sugov_next_freq_shared(sg_cpu, util, max, flags);
+		if (flags & SCHED_CPUFREQ_RT_DL)
+			next_f = sg_policy->policy->cpuinfo.max_freq;
+		else
+			next_f = sugov_next_freq_shared(sg_cpu);
+
 		sugov_update_commit(sg_policy, time, next_f);
 	}
 
@@ -473,7 +494,6 @@ static int sugov_init(struct cpufreq_policy *policy)
 {
 	struct sugov_policy *sg_policy;
 	struct sugov_tunables *tunables;
-	unsigned int lat;
 	int ret = 0;
 
 	/* State should be equivalent to EXIT */
@@ -512,10 +532,16 @@ static int sugov_init(struct cpufreq_policy *policy)
 		goto stop_kthread;
 	}
 
-	tunables->rate_limit_us = LATENCY_MULTIPLIER;
-	lat = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
-	if (lat)
-		tunables->rate_limit_us *= lat;
+	if (policy->transition_delay_us) {
+		tunables->rate_limit_us = policy->transition_delay_us;
+	} else {
+		unsigned int lat;
+
+		tunables->rate_limit_us = LATENCY_MULTIPLIER;
+		lat = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
+		if (lat)
+			tunables->rate_limit_us *= lat;
+	}
 
 	policy->governor_data = sg_policy;
 	sg_policy->tunables = tunables;

kernel/time/tick-sched.c

@@ -993,6 +993,18 @@ ktime_t tick_nohz_get_sleep_length(void)
 	return ts->sleep_length;
 }
 
+/**
+ * tick_nohz_get_idle_calls - return the current idle calls counter value
+ *
+ * Called from the schedutil frequency scaling governor in scheduler context.
+ */
+unsigned long tick_nohz_get_idle_calls(void)
+{
+	struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
+
+	return ts->idle_calls;
+}
+
 static void tick_nohz_account_idle_ticks(struct tick_sched *ts)
 {
 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE

tools/power/pm-graph/Makefile

+PREFIX		?= /usr
+DESTDIR		?=
+
+all:
+	@echo "Nothing to build"
+
+install :
+	install -d  $(DESTDIR)$(PREFIX)/lib/pm-graph
+	install analyze_suspend.py $(DESTDIR)$(PREFIX)/lib/pm-graph
+	install analyze_boot.py $(DESTDIR)$(PREFIX)/lib/pm-graph
+
+	ln -s $(DESTDIR)$(PREFIX)/lib/pm-graph/analyze_boot.py $(DESTDIR)$(PREFIX)/bin/bootgraph
+	ln -s $(DESTDIR)$(PREFIX)/lib/pm-graph/analyze_suspend.py $(DESTDIR)$(PREFIX)/bin/sleepgraph
+
+	install -d  $(DESTDIR)$(PREFIX)/share/man/man8
+	install bootgraph.8 $(DESTDIR)$(PREFIX)/share/man/man8
+	install sleepgraph.8 $(DESTDIR)$(PREFIX)/share/man/man8
+
+uninstall :
+	rm $(DESTDIR)$(PREFIX)/share/man/man8/bootgraph.8
+	rm $(DESTDIR)$(PREFIX)/share/man/man8/sleepgraph.8
+
+	rm $(DESTDIR)$(PREFIX)/bin/bootgraph
+	rm $(DESTDIR)$(PREFIX)/bin/sleepgraph
+
+	rm $(DESTDIR)$(PREFIX)/lib/pm-graph/analyze_boot.py
+	rm $(DESTDIR)$(PREFIX)/lib/pm-graph/analyze_suspend.py
+	rmdir $(DESTDIR)$(PREFIX)/lib/pm-graph

tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py

@@ -353,6 +353,14 @@ def split_csv():
                 os.system('grep -m 1 common_cpu cpu.csv > cpu{:0>3}.csv'.format(index))
                 os.system('grep CPU_{:0>3} cpu.csv >> cpu{:0>3}.csv'.format(index, index))
 
+def fix_ownership(path):
+    """Change the owner of the file to SUDO_UID, if required"""
+
+    uid = os.environ.get('SUDO_UID')
+    gid = os.environ.get('SUDO_GID')
+    if uid is not None:
+        os.chown(path, int(uid), int(gid))
+
 def cleanup_data_files():
     """ clean up existing data files """
 
@@ -518,12 +526,16 @@ else:
 
 if not os.path.exists('results'):
     os.mkdir('results')
+    # The regular user needs to own the directory, not root.
+    fix_ownership('results')
 
 os.chdir('results')
 if os.path.exists(testname):
     print('The test name directory already exists. Please provide a unique test name. Test re-run not supported, yet.')
     sys.exit()
 os.mkdir(testname)
+# The regular user needs to own the directory, not root.
+fix_ownership(testname)
 os.chdir(testname)
 
 # Temporary (or perhaps not)
@@ -566,4 +578,9 @@ plot_scaled_cpu()
 plot_boost_cpu()
 plot_ghz_cpu()
 
+# It is preferrable, but not necessary, that the regular user owns the files, not root.
+for root, dirs, files in os.walk('.'):
+    for f in files:
+        fix_ownership(f)
+
 os.chdir('../../')