Merge branches 'pm-devfreq', 'pm-avs' and 'pm-tools'

* pm-devfreq:
  PM / devfreq: add devfreq_suspend/resume() functions
  PM / devfreq: add support for suspend/resume of a devfreq device
  PM / devfreq: refactor set_target frequency function

* pm-avs:
  PM / AVS: SmartReflex: Switch to SPDX Licence ID
  PM / AVS: SmartReflex: NULL check before some freeing functions is not needed
  PM / AVS: SmartReflex: remove unused function

* pm-tools:
  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
  cpupower : Auto-completion for cpupower tool
  tools/power turbostat: reduce debug output
  tools/power turbosat: fix AMD APIC-id output

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;
+	return devfreq_set_target(devfreq, freq, flags);
 
-	freqs.old = cur_freq;
-	freqs.new = freq;
-	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE);
-
-	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,
-				DEVFREQ_GOV_SUSPEND, NULL);
+	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,
-				DEVFREQ_GOV_RESUME, NULL);
+	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/power/avs/smartreflex.c

@@ -1,3 +1,4 @@
+// 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)
 {
@@ -1010,8 +987,7 @@ 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);
+	debugfs_remove_recursive(sr_info->dbg_dir);
 
 	pm_runtime_disable(&pdev->dev);
 	list_del(&sr_info->node);
@@ -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/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/power/smartreflex.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * OMAP Smartreflex Defines and Routines
  *
@@ -11,10 +12,6 @@
  *
  * Copyright (C) 2007 Texas Instruments, Inc.
  * Lesly A M <x0080970@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #ifndef __POWER_SMARTREFLEX_H
@@ -303,9 +300,6 @@ void omap_sr_enable(struct voltagedomain *voltdm);
 void omap_sr_disable(struct voltagedomain *voltdm);
 void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
 
-/* API to register the pmic specific data with the smartreflex driver. */
-void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
-
 /* Smartreflex driver hooks to be called from Smartreflex class driver */
 int sr_enable(struct omap_sr *sr, unsigned long volt);
 void sr_disable(struct omap_sr *sr);
@@ -320,7 +314,5 @@ static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
 static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
 static inline void omap_sr_disable_reset_volt(
 		struct voltagedomain *voltdm) {}
-static inline void omap_sr_register_pmic(
-		struct omap_sr_pmic_data *pmic_data) {}
 #endif
 #endif

tools/power/cpupower/Makefile

@@ -89,14 +89,16 @@ 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:
 
 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