Merge tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:
 "As far as the number of commits goes, the top spot belongs to ACPI
  this time with cpufreq in the second position and a handful of PM
  core, PNP and cpuidle updates.  They are fixes and cleanups mostly, as
  usual, with a couple of new features in the mix.

  The most visible change is probably that we will create struct
  acpi_device objects (visible in sysfs) for all devices represented in
  the ACPI tables regardless of their status and there will be a new
  sysfs attribute under those objects allowing user space to check that
  status via _STA.

  Consequently, ACPI device eject or generally hot-removal will not
  delete those objects, unless the table containing the corresponding
  namespace nodes is unloaded, which is extremely rare.  Also ACPI
  container hotplug will be handled quite a bit differently and cpufreq
  will support CPU boost ("turbo") generically and not only in the
  acpi-cpufreq driver.

  Specifics:

   - ACPI core changes to make it create a struct acpi_device object for
     every device represented in the ACPI tables during all namespace
     scans regardless of the current status of that device.  In
     accordance with this, ACPI hotplug operations will not delete those
     objects, unless the underlying ACPI tables go away.

   - On top of the above, new sysfs attribute for ACPI device objects
     allowing user space to check device status by triggering the
     execution of _STA for its ACPI object.  From Srinivas Pandruvada.

   - ACPI core hotplug changes reducing code duplication, integrating
     the PCI root hotplug with the core and reworking container hotplug.

   - ACPI core simplifications making it use ACPI_COMPANION() in the
     code "glueing" ACPI device objects to "physical" devices.

   - ACPICA update to upstream version 20131218.  This adds support for
     the DBG2 and PCCT tables to ACPICA, fixes some bugs and improves
     debug facilities.  From Bob Moore, Lv Zheng and Betty Dall.

   - Init code change to carry out the early ACPI initialization
     earlier.  That should allow us to use ACPI during the timekeeping
     initialization and possibly to simplify the EFI initialization too.
     From Chun-Yi Lee.

   - Clenups of the inclusions of ACPI headers in many places all over
     from Lv Zheng and Rashika Kheria (work in progress).

   - New helper for ACPI _DSM execution and rework of the code in
     drivers that uses _DSM to execute it via the new helper.  From
     Jiang Liu.

   - New Win8 OSI blacklist entries from Takashi Iwai.

   - Assorted ACPI fixes and cleanups from Al Stone, Emil Goode, Hanjun
     Guo, Lan Tianyu, Masanari Iida, Oliver Neukum, Prarit Bhargava,
     Rashika Kheria, Tang Chen, Zhang Rui.

   - intel_pstate driver updates, including proper Baytrail support,
     from Dirk Brandewie and intel_pstate documentation from Ramkumar
     Ramachandra.

   - Generic CPU boost ("turbo") support for cpufreq from Lukasz
     Majewski.

   - powernow-k6 cpufreq driver fixes from Mikulas Patocka.

   - cpufreq core fixes and cleanups from Viresh Kumar, Jane Li, Mark
     Brown.

   - Assorted cpufreq drivers fixes and cleanups from Anson Huang, John
     Tobias, Paul Bolle, Paul Walmsley, Sachin Kamat, Shawn Guo, Viresh
     Kumar.

   - cpuidle cleanups from Bartlomiej Zolnierkiewicz.

   - Support for hibernation APM events from Bin Shi.

   - Hibernation fix to avoid bringing up nonboot CPUs with ACPI EC
     disabled during thaw transitions from Bjørn Mork.

   - PM core fixes and cleanups from Ben Dooks, Leonardo Potenza, Ulf
     Hansson.

   - PNP subsystem fixes and cleanups from Dmitry Torokhov, Levente
     Kurusa, Rashika Kheria.

   - New tool for profiling system suspend from Todd E Brandt and a
     cpupower tool cleanup from One Thousand Gnomes"

* tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (153 commits)
  thermal: exynos: boost: Automatic enable/disable of BOOST feature (at Exynos4412)
  cpufreq: exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ
  Documentation: cpufreq / boost: Update BOOST documentation
  cpufreq: exynos: Extend Exynos cpufreq driver to support boost
  cpufreq / boost: Kconfig: Support for software-managed BOOST
  acpi-cpufreq: Adjust the code to use the common boost attribute
  cpufreq: Add boost frequency support in core
  intel_pstate: Add trace point to report internal state.
  cpufreq: introduce cpufreq_generic_get() routine
  ARM: SA1100: Create dummy clk_get_rate() to avoid build failures
  cpufreq: stats: create sysfs entries when cpufreq_stats is a module
  cpufreq: stats: free table and remove sysfs entry in a single routine
  cpufreq: stats: remove hotplug notifiers
  cpufreq: stats: handle cpufreq_unregister_driver() and suspend/resume properly
  cpufreq: speedstep: remove unused speedstep_get_state
  platform: introduce OF style 'modalias' support for platform bus
  PM / tools: new tool for suspend/resume performance optimization
  ACPI: fix module autoloading for ACPI enumerated devices
  ACPI: add module autoloading support for ACPI enumerated devices
  ACPI: fix create_modalias() return value handling
  ...

40 files changed, 826 insertions, 590 deletions

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 38093e272377..d100926aca0a 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -20,6 +20,10 @@ if CPU_FREQ
 config CPU_FREQ_GOV_COMMON
 	bool
 
+config CPU_FREQ_BOOST_SW
+	bool
+	depends on THERMAL
+
 config CPU_FREQ_STAT
 	tristate "CPU frequency translation statistics"
 	default y
@@ -181,7 +185,8 @@ config CPU_FREQ_GOV_CONSERVATIVE
 
 config GENERIC_CPUFREQ_CPU0
 	tristate "Generic CPU0 cpufreq driver"
-	depends on HAVE_CLK && REGULATOR && PM_OPP && OF
+	depends on HAVE_CLK && REGULATOR && OF
+	select PM_OPP
 	help
 	  This adds a generic cpufreq driver for CPU0 frequency management.
 	  It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index ce52ed949249..31297499a60a 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -4,7 +4,8 @@
 
 config ARM_BIG_LITTLE_CPUFREQ
 	tristate "Generic ARM big LITTLE CPUfreq driver"
-	depends on ARM_CPU_TOPOLOGY && PM_OPP && HAVE_CLK
+	depends on ARM && BIG_LITTLE && ARM_CPU_TOPOLOGY && HAVE_CLK
+	select PM_OPP
 	help
 	  This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
 
@@ -54,7 +55,8 @@ config ARM_EXYNOS5250_CPUFREQ
 config ARM_EXYNOS5440_CPUFREQ
 	bool "SAMSUNG EXYNOS5440"
 	depends on SOC_EXYNOS5440
-	depends on HAVE_CLK && PM_OPP && OF
+	depends on HAVE_CLK && OF
+	select PM_OPP
 	default y
 	help
 	  This adds the CPUFreq driver for Samsung EXYNOS5440
@@ -64,6 +66,21 @@ config ARM_EXYNOS5440_CPUFREQ
 
 	  If in doubt, say N.
 
+config ARM_EXYNOS_CPU_FREQ_BOOST_SW
+	bool "EXYNOS Frequency Overclocking - Software"
+	depends on ARM_EXYNOS_CPUFREQ
+	select CPU_FREQ_BOOST_SW
+	select EXYNOS_THERMAL
+	help
+	  This driver supports software managed overclocking (BOOST).
+	  It allows usage of special frequencies for Samsung Exynos
+	  processors if thermal conditions are appropriate.
+
+	  It reguires, for safe operation, thermal framework with properly
+	  defined trip points.
+
+	  If in doubt, say N.
+
 config ARM_HIGHBANK_CPUFREQ
 	tristate "Calxeda Highbank-based"
 	depends on ARCH_HIGHBANK
@@ -79,11 +96,11 @@ config ARM_HIGHBANK_CPUFREQ
 	  If in doubt, say N.
 
 config ARM_IMX6Q_CPUFREQ
-	tristate "Freescale i.MX6Q cpufreq support"
-	depends on SOC_IMX6Q
+	tristate "Freescale i.MX6 cpufreq support"
+	depends on ARCH_MXC
 	depends on REGULATOR_ANATOP
 	help
-	  This adds cpufreq driver support for Freescale i.MX6Q SOC.
+	  This adds cpufreq driver support for Freescale i.MX6 series SoCs.
 
 	  If in doubt, say N.
 
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index caf41ebea184..79e5608e71b5 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -80,7 +80,6 @@ static struct acpi_processor_performance __percpu *acpi_perf_data;
 static struct cpufreq_driver acpi_cpufreq_driver;
 
 static unsigned int acpi_pstate_strict;
-static bool boost_enabled, boost_supported;
 static struct msr __percpu *msrs;
 
 static bool boost_state(unsigned int cpu)
@@ -133,49 +132,16 @@ static void boost_set_msrs(bool enable, const struct cpumask *cpumask)
 	wrmsr_on_cpus(cpumask, msr_addr, msrs);
 }
 
-static ssize_t _store_boost(const char *buf, size_t count)
+static int _store_boost(int val)
 {
-	int ret;
-	unsigned long val = 0;
-
-	if (!boost_supported)
-		return -EINVAL;
-
-	ret = kstrtoul(buf, 10, &val);
-	if (ret || (val > 1))
-		return -EINVAL;
-
-	if ((val && boost_enabled) || (!val && !boost_enabled))
-		return count;
-
 	get_online_cpus();
-
 	boost_set_msrs(val, cpu_online_mask);
-
 	put_online_cpus();
-
-	boost_enabled = val;
 	pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
 
-	return count;
-}
-
-static ssize_t store_global_boost(struct kobject *kobj, struct attribute *attr,
-				  const char *buf, size_t count)
-{
-	return _store_boost(buf, count);
-}
-
-static ssize_t show_global_boost(struct kobject *kobj,
-				 struct attribute *attr, char *buf)
-{
-	return sprintf(buf, "%u\n", boost_enabled);
+	return 0;
 }
 
-static struct global_attr global_boost = __ATTR(boost, 0644,
-						show_global_boost,
-						store_global_boost);
-
 static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf)
 {
 	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
@@ -186,15 +152,32 @@ static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf)
 cpufreq_freq_attr_ro(freqdomain_cpus);
 
 #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB
+static ssize_t store_boost(const char *buf, size_t count)
+{
+	int ret;
+	unsigned long val = 0;
+
+	if (!acpi_cpufreq_driver.boost_supported)
+		return -EINVAL;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret || (val > 1))
+		return -EINVAL;
+
+	_store_boost((int) val);
+
+	return count;
+}
+
 static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
 			 size_t count)
 {
-	return _store_boost(buf, count);
+	return store_boost(buf, count);
 }
 
 static ssize_t show_cpb(struct cpufreq_policy *policy, char *buf)
 {
-	return sprintf(buf, "%u\n", boost_enabled);
+	return sprintf(buf, "%u\n", acpi_cpufreq_driver.boost_enabled);
 }
 
 cpufreq_freq_attr_rw(cpb);
@@ -554,7 +537,7 @@ static int boost_notify(struct notifier_block *nb, unsigned long action,
 	switch (action) {
 	case CPU_UP_PREPARE:
 	case CPU_UP_PREPARE_FROZEN:
-		boost_set_msrs(boost_enabled, cpumask);
+		boost_set_msrs(acpi_cpufreq_driver.boost_enabled, cpumask);
 		break;
 
 	case CPU_DOWN_PREPARE:
@@ -911,6 +894,7 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
 	.resume		= acpi_cpufreq_resume,
 	.name		= "acpi-cpufreq",
 	.attr		= acpi_cpufreq_attr,
+	.set_boost      = _store_boost,
 };
 
 static void __init acpi_cpufreq_boost_init(void)
@@ -921,33 +905,22 @@ static void __init acpi_cpufreq_boost_init(void)
 		if (!msrs)
 			return;
 
-		boost_supported = true;
-		boost_enabled = boost_state(0);
-
+		acpi_cpufreq_driver.boost_supported = true;
+		acpi_cpufreq_driver.boost_enabled = boost_state(0);
 		get_online_cpus();
 
 		/* Force all MSRs to the same value */
-		boost_set_msrs(boost_enabled, cpu_online_mask);
+		boost_set_msrs(acpi_cpufreq_driver.boost_enabled,
+			       cpu_online_mask);
 
 		register_cpu_notifier(&boost_nb);
 
 		put_online_cpus();
-	} else
-		global_boost.attr.mode = 0444;
-
-	/* We create the boost file in any case, though for systems without
-	 * hardware support it will be read-only and hardwired to return 0.
-	 */
-	if (cpufreq_sysfs_create_file(&(global_boost.attr)))
-		pr_warn(PFX "could not register global boost sysfs file\n");
-	else
-		pr_debug("registered global boost sysfs file\n");
+	}
 }
 
 static void __exit acpi_cpufreq_boost_exit(void)
 {
-	cpufreq_sysfs_remove_file(&(global_boost.attr));
-
 	if (msrs) {
 		unregister_cpu_notifier(&boost_nb);
 
@@ -993,12 +966,11 @@ static int __init acpi_cpufreq_init(void)
 			*iter = &cpb;
 	}
 #endif
+	acpi_cpufreq_boost_init();
 
 	ret = cpufreq_register_driver(&acpi_cpufreq_driver);
 	if (ret)
 		free_acpi_perf_data();
-	else
-		acpi_cpufreq_boost_init();
 
 	return ret;
 }
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index 5519933813ea..72f87e9317e3 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -488,7 +488,8 @@ static int bL_cpufreq_exit(struct cpufreq_policy *policy)
 static struct cpufreq_driver bL_cpufreq_driver = {
 	.name			= "arm-big-little",
 	.flags			= CPUFREQ_STICKY |
-					CPUFREQ_HAVE_GOVERNOR_PER_POLICY,
+					CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
+					CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify			= cpufreq_generic_frequency_table_verify,
 	.target_index		= bL_cpufreq_set_target,
 	.get			= bL_cpufreq_get_rate,
diff --git a/drivers/cpufreq/at32ap-cpufreq.c b/drivers/cpufreq/at32ap-cpufreq.c
index 7c03dd84f66a..a1c79f549edb 100644
--- a/drivers/cpufreq/at32ap-cpufreq.c
+++ b/drivers/cpufreq/at32ap-cpufreq.c
@@ -21,17 +21,8 @@
 #include <linux/export.h>
 #include <linux/slab.h>
 
-static struct clk *cpuclk;
 static struct cpufreq_frequency_table *freq_table;
 
-static unsigned int at32_get_speed(unsigned int cpu)
-{
-	/* No SMP support */
-	if (cpu)
-		return 0;
-	return (unsigned int)((clk_get_rate(cpuclk) + 500) / 1000);
-}
-
 static unsigned int	ref_freq;
 static unsigned long	loops_per_jiffy_ref;
 
@@ -39,7 +30,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	unsigned int old_freq, new_freq;
 
-	old_freq = at32_get_speed(0);
+	old_freq = policy->cur;
 	new_freq = freq_table[index].frequency;
 
 	if (!ref_freq) {
@@ -50,7 +41,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
 	if (old_freq < new_freq)
 		boot_cpu_data.loops_per_jiffy = cpufreq_scale(
 				loops_per_jiffy_ref, ref_freq, new_freq);
-	clk_set_rate(cpuclk, new_freq * 1000);
+	clk_set_rate(policy->clk, new_freq * 1000);
 	if (new_freq < old_freq)
 		boot_cpu_data.loops_per_jiffy = cpufreq_scale(
 				loops_per_jiffy_ref, ref_freq, new_freq);
@@ -61,6 +52,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
 static int at32_cpufreq_driver_init(struct cpufreq_policy *policy)
 {
 	unsigned int frequency, rate, min_freq;
+	static struct clk *cpuclk;
 	int retval, steps, i;
 
 	if (policy->cpu != 0)
@@ -103,6 +95,7 @@ static int at32_cpufreq_driver_init(struct cpufreq_policy *policy)
 		frequency /= 2;
 	}
 
+	policy->clk = cpuclk;
 	freq_table[steps - 1].frequency = CPUFREQ_TABLE_END;
 
 	retval = cpufreq_table_validate_and_show(policy, freq_table);
@@ -123,7 +116,7 @@ static struct cpufreq_driver at32_driver = {
 	.init		= at32_cpufreq_driver_init,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= at32_set_target,
-	.get		= at32_get_speed,
+	.get		= cpufreq_generic_get,
 	.flags		= CPUFREQ_STICKY,
 };
 
diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index d4585ce2346c..bb7b3082efb3 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -30,11 +30,6 @@ static struct clk *cpu_clk;
 static struct regulator *cpu_reg;
 static struct cpufreq_frequency_table *freq_table;
 
-static unsigned int cpu0_get_speed(unsigned int cpu)
-{
-	return clk_get_rate(cpu_clk) / 1000;
-}
-
 static int cpu0_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	struct dev_pm_opp *opp;
@@ -44,7 +39,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy, unsigned int index)
 	int ret;
 
 	freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
-	if (freq_Hz < 0)
+	if (freq_Hz <= 0)
 		freq_Hz = freq_table[index].frequency * 1000;
 
 	freq_exact = freq_Hz;
@@ -100,6 +95,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy, unsigned int index)
 
 static int cpu0_cpufreq_init(struct cpufreq_policy *policy)
 {
+	policy->clk = cpu_clk;
 	return cpufreq_generic_init(policy, freq_table, transition_latency);
 }
 
@@ -107,7 +103,7 @@ static struct cpufreq_driver cpu0_cpufreq_driver = {
 	.flags = CPUFREQ_STICKY,
 	.verify = cpufreq_generic_frequency_table_verify,
 	.target_index = cpu0_set_target,
-	.get = cpu0_get_speed,
+	.get = cpufreq_generic_get,
 	.init = cpu0_cpufreq_init,
 	.exit = cpufreq_generic_exit,
 	.name = "generic_cpu0",
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 8d19f7c06010..08ca8c9f41cd 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -39,7 +39,7 @@ static struct cpufreq_driver *cpufreq_driver;
 static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
 static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data_fallback);
 static DEFINE_RWLOCK(cpufreq_driver_lock);
-static DEFINE_MUTEX(cpufreq_governor_lock);
+DEFINE_MUTEX(cpufreq_governor_lock);
 static LIST_HEAD(cpufreq_policy_list);
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -176,6 +176,20 @@ int cpufreq_generic_init(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_generic_init);
 
+unsigned int cpufreq_generic_get(unsigned int cpu)
+{
+	struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
+
+	if (!policy || IS_ERR(policy->clk)) {
+		pr_err("%s: No %s associated to cpu: %d\n", __func__,
+				policy ? "clk" : "policy", cpu);
+		return 0;
+	}
+
+	return clk_get_rate(policy->clk) / 1000;
+}
+EXPORT_SYMBOL_GPL(cpufreq_generic_get);
+
 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
 {
 	struct cpufreq_policy *policy = NULL;
@@ -320,10 +334,51 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_notify_transition);
 
+/* Do post notifications when there are chances that transition has failed */
+void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
+		struct cpufreq_freqs *freqs, int transition_failed)
+{
+	cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+	if (!transition_failed)
+		return;
+
+	swap(freqs->old, freqs->new);
+	cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
+	cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+}
+EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition);
+
 
 /*********************************************************************
  *                          SYSFS INTERFACE                          *
  *********************************************************************/
+ssize_t show_boost(struct kobject *kobj,
+				 struct attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", cpufreq_driver->boost_enabled);
+}
+
+static ssize_t store_boost(struct kobject *kobj, struct attribute *attr,
+				  const char *buf, size_t count)
+{
+	int ret, enable;
+
+	ret = sscanf(buf, "%d", &enable);
+	if (ret != 1 || enable < 0 || enable > 1)
+		return -EINVAL;
+
+	if (cpufreq_boost_trigger_state(enable)) {
+		pr_err("%s: Cannot %s BOOST!\n", __func__,
+		       enable ? "enable" : "disable");
+		return -EINVAL;
+	}
+
+	pr_debug("%s: cpufreq BOOST %s\n", __func__,
+		 enable ? "enabled" : "disabled");
+
+	return count;
+}
+define_one_global_rw(boost);
 
 static struct cpufreq_governor *__find_governor(const char *str_governor)
 {
@@ -929,6 +984,9 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
 	struct kobject *kobj;
 	struct completion *cmp;
 
+	blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+			CPUFREQ_REMOVE_POLICY, policy);
+
 	down_read(&policy->rwsem);
 	kobj = &policy->kobj;
 	cmp = &policy->kobj_unregister;
@@ -1051,6 +1109,11 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
 		goto err_set_policy_cpu;
 	}
 
+	write_lock_irqsave(&cpufreq_driver_lock, flags);
+	for_each_cpu(j, policy->cpus)
+		per_cpu(cpufreq_cpu_data, j) = policy;
+	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
 	if (cpufreq_driver->get) {
 		policy->cur = cpufreq_driver->get(policy->cpu);
 		if (!policy->cur) {
@@ -1059,6 +1122,46 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
 		}
 	}
 
+	/*
+	 * Sometimes boot loaders set CPU frequency to a value outside of
+	 * frequency table present with cpufreq core. In such cases CPU might be
+	 * unstable if it has to run on that frequency for long duration of time
+	 * and so its better to set it to a frequency which is specified in
+	 * freq-table. This also makes cpufreq stats inconsistent as
+	 * cpufreq-stats would fail to register because current frequency of CPU
+	 * isn't found in freq-table.
+	 *
+	 * Because we don't want this change to effect boot process badly, we go
+	 * for the next freq which is >= policy->cur ('cur' must be set by now,
+	 * otherwise we will end up setting freq to lowest of the table as 'cur'
+	 * is initialized to zero).
+	 *
+	 * We are passing target-freq as "policy->cur - 1" otherwise
+	 * __cpufreq_driver_target() would simply fail, as policy->cur will be
+	 * equal to target-freq.
+	 */
+	if ((cpufreq_driver->flags & CPUFREQ_NEED_INITIAL_FREQ_CHECK)
+	    && has_target()) {
+		/* Are we running at unknown frequency ? */
+		ret = cpufreq_frequency_table_get_index(policy, policy->cur);
+		if (ret == -EINVAL) {
+			/* Warn user and fix it */
+			pr_warn("%s: CPU%d: Running at unlisted freq: %u KHz\n",
+				__func__, policy->cpu, policy->cur);
+			ret = __cpufreq_driver_target(policy, policy->cur - 1,
+				CPUFREQ_RELATION_L);
+
+			/*
+			 * Reaching here after boot in a few seconds may not
+			 * mean that system will remain stable at "unknown"
+			 * frequency for longer duration. Hence, a BUG_ON().
+			 */
+			BUG_ON(ret);
+			pr_warn("%s: CPU%d: Unlisted initial frequency changed to: %u KHz\n",
+				__func__, policy->cpu, policy->cur);
+		}
+	}
+
 	/* related cpus should atleast have policy->cpus */
 	cpumask_or(policy->related_cpus, policy->related_cpus, policy->cpus);
 
@@ -1085,15 +1188,12 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
 	}
 #endif
 
-	write_lock_irqsave(&cpufreq_driver_lock, flags);
-	for_each_cpu(j, policy->cpus)
-		per_cpu(cpufreq_cpu_data, j) = policy;
-	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
 	if (!frozen) {
 		ret = cpufreq_add_dev_interface(policy, dev);
 		if (ret)
 			goto err_out_unregister;
+		blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+				CPUFREQ_CREATE_POLICY, policy);
 	}
 
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
@@ -1115,12 +1215,12 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
 	return 0;
 
 err_out_unregister:
+err_get_freq:
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
 	for_each_cpu(j, policy->cpus)
 		per_cpu(cpufreq_cpu_data, j) = NULL;
 	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
-err_get_freq:
 	if (cpufreq_driver->exit)
 		cpufreq_driver->exit(policy);
 err_set_policy_cpu:
@@ -1725,17 +1825,8 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
 			pr_err("%s: Failed to change cpu frequency: %d\n",
 					__func__, retval);
 
-		if (notify) {
-			/*
-			 * Notify with old freq in case we failed to change
-			 * frequency
-			 */
-			if (retval)
-				freqs.new = freqs.old;
-
-			cpufreq_notify_transition(policy, &freqs,
-					CPUFREQ_POSTCHANGE);
-		}
+		if (notify)
+			cpufreq_notify_post_transition(policy, &freqs, retval);
 	}
 
 out:
@@ -2120,6 +2211,73 @@ static struct notifier_block __refdata cpufreq_cpu_notifier = {
 };
 
 /*********************************************************************
+ *               BOOST						     *
+ *********************************************************************/
+static int cpufreq_boost_set_sw(int state)
+{
+	struct cpufreq_frequency_table *freq_table;
+	struct cpufreq_policy *policy;
+	int ret = -EINVAL;
+
+	list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+		freq_table = cpufreq_frequency_get_table(policy->cpu);
+		if (freq_table) {
+			ret = cpufreq_frequency_table_cpuinfo(policy,
+							freq_table);
+			if (ret) {
+				pr_err("%s: Policy frequency update failed\n",
+				       __func__);
+				break;
+			}
+			policy->user_policy.max = policy->max;
+			__cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
+		}
+	}
+
+	return ret;
+}
+
+int cpufreq_boost_trigger_state(int state)
+{
+	unsigned long flags;
+	int ret = 0;
+
+	if (cpufreq_driver->boost_enabled == state)
+		return 0;
+
+	write_lock_irqsave(&cpufreq_driver_lock, flags);
+	cpufreq_driver->boost_enabled = state;
+	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+	ret = cpufreq_driver->set_boost(state);
+	if (ret) {
+		write_lock_irqsave(&cpufreq_driver_lock, flags);
+		cpufreq_driver->boost_enabled = !state;
+		write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+		pr_err("%s: Cannot %s BOOST\n", __func__,
+		       state ? "enable" : "disable");
+	}
+
+	return ret;
+}
+
+int cpufreq_boost_supported(void)
+{
+	if (likely(cpufreq_driver))
+		return cpufreq_driver->boost_supported;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_boost_supported);
+
+int cpufreq_boost_enabled(void)
+{
+	return cpufreq_driver->boost_enabled;
+}
+EXPORT_SYMBOL_GPL(cpufreq_boost_enabled);
+
+/*********************************************************************
  *               REGISTER / UNREGISTER CPUFREQ DRIVER                *
  *********************************************************************/
 
@@ -2159,9 +2317,25 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 	cpufreq_driver = driver_data;
 	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
+	if (cpufreq_boost_supported()) {
+		/*
+		 * Check if driver provides function to enable boost -
+		 * if not, use cpufreq_boost_set_sw as default
+		 */
+		if (!cpufreq_driver->set_boost)
+			cpufreq_driver->set_boost = cpufreq_boost_set_sw;
+
+		ret = cpufreq_sysfs_create_file(&boost.attr);
+		if (ret) {
+			pr_err("%s: cannot register global BOOST sysfs file\n",
+				__func__);
+			goto err_null_driver;
+		}
+	}
+
 	ret = subsys_interface_register(&cpufreq_interface);
 	if (ret)
-		goto err_null_driver;
+		goto err_boost_unreg;
 
 	if (!(cpufreq_driver->flags & CPUFREQ_STICKY)) {
 		int i;
@@ -2188,6 +2362,9 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 	return 0;
 err_if_unreg:
 	subsys_interface_unregister(&cpufreq_interface);
+err_boost_unreg:
+	if (cpufreq_boost_supported())
+		cpufreq_sysfs_remove_file(&boost.attr);
 err_null_driver:
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
 	cpufreq_driver = NULL;
@@ -2214,6 +2391,9 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
 	pr_debug("unregistering driver %s\n", driver->name);
 
 	subsys_interface_unregister(&cpufreq_interface);
+	if (cpufreq_boost_supported())
+		cpufreq_sysfs_remove_file(&boost.attr);
+
 	unregister_hotcpu_notifier(&cpufreq_cpu_notifier);
 
 	down_write(&cpufreq_rwsem);
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index e6be63561fa6..ba43991ba98a 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -119,8 +119,9 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
 {
 	int i;
 
+	mutex_lock(&cpufreq_governor_lock);
 	if (!policy->governor_enabled)
-		return;
+		goto out_unlock;
 
 	if (!all_cpus) {
 		/*
@@ -135,6 +136,9 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
 		for_each_cpu(i, policy->cpus)
 			__gov_queue_work(i, dbs_data, delay);
 	}
+
+out_unlock:
+	mutex_unlock(&cpufreq_governor_lock);
 }
 EXPORT_SYMBOL_GPL(gov_queue_work);
 
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h
index b5f2b8618949..bfb9ae14142c 100644
--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -257,6 +257,8 @@ static ssize_t show_sampling_rate_min_gov_pol				\
 	return sprintf(buf, "%u\n", dbs_data->min_sampling_rate);	\
 }
 
+extern struct mutex cpufreq_governor_lock;
+
 void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
 bool need_load_eval(struct cpu_dbs_common_info *cdbs,
 		unsigned int sampling_rate);
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 4cf0d2805cb2..5793e1447fb1 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -151,44 +151,36 @@ static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
 	return -1;
 }
 
-/* should be called late in the CPU removal sequence so that the stats
- * memory is still available in case someone tries to use it.
- */
-static void cpufreq_stats_free_table(unsigned int cpu)
+static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
 {
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, cpu);
+	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
 
-	if (stat) {
-		pr_debug("%s: Free stat table\n", __func__);
-		kfree(stat->time_in_state);
-		kfree(stat);
-		per_cpu(cpufreq_stats_table, cpu) = NULL;
-	}
+	if (!stat)
+		return;
+
+	pr_debug("%s: Free stat table\n", __func__);
+
+	sysfs_remove_group(&policy->kobj, &stats_attr_group);
+	kfree(stat->time_in_state);
+	kfree(stat);
+	per_cpu(cpufreq_stats_table, policy->cpu) = NULL;
 }
 
-/* must be called early in the CPU removal sequence (before
- * cpufreq_remove_dev) so that policy is still valid.
- */
-static void cpufreq_stats_free_sysfs(unsigned int cpu)
+static void cpufreq_stats_free_table(unsigned int cpu)
 {
-	struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+	struct cpufreq_policy *policy;
 
+	policy = cpufreq_cpu_get(cpu);
 	if (!policy)
 		return;
 
-	if (!cpufreq_frequency_get_table(cpu))
-		goto put_ref;
-
-	if (!policy_is_shared(policy)) {
-		pr_debug("%s: Free sysfs stat\n", __func__);
-		sysfs_remove_group(&policy->kobj, &stats_attr_group);
-	}
+	if (cpufreq_frequency_get_table(policy->cpu))
+		__cpufreq_stats_free_table(policy);
 
-put_ref:
 	cpufreq_cpu_put(policy);
 }
 
-static int cpufreq_stats_create_table(struct cpufreq_policy *policy,
+static int __cpufreq_stats_create_table(struct cpufreq_policy *policy,
 		struct cpufreq_frequency_table *table)
 {
 	unsigned int i, j, count = 0, ret = 0;
@@ -261,6 +253,26 @@ error_get_fail:
 	return ret;
 }
 
+static void cpufreq_stats_create_table(unsigned int cpu)
+{
+	struct cpufreq_policy *policy;
+	struct cpufreq_frequency_table *table;
+
+	/*
+	 * "likely(!policy)" because normally cpufreq_stats will be registered
+	 * before cpufreq driver
+	 */
+	policy = cpufreq_cpu_get(cpu);
+	if (likely(!policy))
+		return;
+
+	table = cpufreq_frequency_get_table(policy->cpu);
+	if (likely(table))
+		__cpufreq_stats_create_table(policy, table);
+
+	cpufreq_cpu_put(policy);
+}
+
 static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy)
 {
 	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table,
@@ -277,7 +289,7 @@ static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy)
 static int cpufreq_stat_notifier_policy(struct notifier_block *nb,
 		unsigned long val, void *data)
 {
-	int ret;
+	int ret = 0;
 	struct cpufreq_policy *policy = data;
 	struct cpufreq_frequency_table *table;
 	unsigned int cpu = policy->cpu;
@@ -287,15 +299,16 @@ static int cpufreq_stat_notifier_policy(struct notifier_block *nb,
 		return 0;
 	}
 
-	if (val != CPUFREQ_NOTIFY)
-		return 0;
 	table = cpufreq_frequency_get_table(cpu);
 	if (!table)
 		return 0;
-	ret = cpufreq_stats_create_table(policy, table);
-	if (ret)
-		return ret;
-	return 0;
+
+	if (val == CPUFREQ_CREATE_POLICY)
+		ret = __cpufreq_stats_create_table(policy, table);
+	else if (val == CPUFREQ_REMOVE_POLICY)
+		__cpufreq_stats_free_table(policy);
+
+	return ret;
 }
 
 static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
@@ -334,29 +347,6 @@ static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
 	return 0;
 }
 
-static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
-					       unsigned long action,
-					       void *hcpu)
-{
-	unsigned int cpu = (unsigned long)hcpu;
-
-	switch (action) {
-	case CPU_DOWN_PREPARE:
-		cpufreq_stats_free_sysfs(cpu);
-		break;
-	case CPU_DEAD:
-		cpufreq_stats_free_table(cpu);
-		break;
-	}
-	return NOTIFY_OK;
-}
-
-/* priority=1 so this will get called before cpufreq_remove_dev */
-static struct notifier_block cpufreq_stat_cpu_notifier __refdata = {
-	.notifier_call = cpufreq_stat_cpu_callback,
-	.priority = 1,
-};
-
 static struct notifier_block notifier_policy_block = {
 	.notifier_call = cpufreq_stat_notifier_policy
 };
@@ -376,14 +366,14 @@ static int __init cpufreq_stats_init(void)
 	if (ret)
 		return ret;
 
-	register_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
+	for_each_online_cpu(cpu)
+		cpufreq_stats_create_table(cpu);
 
 	ret = cpufreq_register_notifier(&notifier_trans_block,
 				CPUFREQ_TRANSITION_NOTIFIER);
 	if (ret) {
 		cpufreq_unregister_notifier(&notifier_policy_block,
 				CPUFREQ_POLICY_NOTIFIER);
-		unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
 		for_each_online_cpu(cpu)
 			cpufreq_stats_free_table(cpu);
 		return ret;
@@ -399,11 +389,8 @@ static void __exit cpufreq_stats_exit(void)
 			CPUFREQ_POLICY_NOTIFIER);
 	cpufreq_unregister_notifier(&notifier_trans_block,
 			CPUFREQ_TRANSITION_NOTIFIER);
-	unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
-	for_each_online_cpu(cpu) {
+	for_each_online_cpu(cpu)
 		cpufreq_stats_free_table(cpu);
-		cpufreq_stats_free_sysfs(cpu);
-	}
 }
 
 MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>");
diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c
index 5e8a854381b7..2cf33848d86e 100644
--- a/drivers/cpufreq/davinci-cpufreq.c
+++ b/drivers/cpufreq/davinci-cpufreq.c
@@ -58,14 +58,6 @@ static int davinci_verify_speed(struct cpufreq_policy *policy)
 	return 0;
 }
 
-static unsigned int davinci_getspeed(unsigned int cpu)
-{
-	if (cpu)
-		return 0;
-
-	return clk_get_rate(cpufreq.armclk) / 1000;
-}
-
 static int davinci_target(struct cpufreq_policy *policy, unsigned int idx)
 {
 	struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
@@ -73,7 +65,7 @@ static int davinci_target(struct cpufreq_policy *policy, unsigned int idx)
 	unsigned int old_freq, new_freq;
 	int ret = 0;
 
-	old_freq = davinci_getspeed(0);
+	old_freq = policy->cur;
 	new_freq = pdata->freq_table[idx].frequency;
 
 	/* if moving to higher frequency, up the voltage beforehand */
@@ -116,6 +108,8 @@ static int davinci_cpu_init(struct cpufreq_policy *policy)
 			return result;
 	}
 
+	policy->clk = cpufreq.armclk;
+
 	/*
 	 * Time measurement across the target() function yields ~1500-1800us
 	 * time taken with no drivers on notification list.
@@ -126,10 +120,10 @@ static int davinci_cpu_init(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver davinci_driver = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= davinci_verify_speed,
 	.target_index	= davinci_target,
-	.get		= davinci_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= davinci_cpu_init,
 	.exit		= cpufreq_generic_exit,
 	.name		= "davinci",
diff --git a/drivers/cpufreq/dbx500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c
index 0e67ab96321a..412a78bb0c94 100644
--- a/drivers/cpufreq/dbx500-cpufreq.c
+++ b/drivers/cpufreq/dbx500-cpufreq.c
@@ -26,32 +26,18 @@ static int dbx500_cpufreq_target(struct cpufreq_policy *policy,
 	return clk_set_rate(armss_clk, freq_table[index].frequency * 1000);
 }
 
-static unsigned int dbx500_cpufreq_getspeed(unsigned int cpu)
-{
-	int i = 0;
-	unsigned long freq = clk_get_rate(armss_clk) / 1000;
-
-	/* The value is rounded to closest frequency in the defined table. */
-	while (freq_table[i + 1].frequency != CPUFREQ_TABLE_END) {
-		if (freq < freq_table[i].frequency +
-		   (freq_table[i + 1].frequency - freq_table[i].frequency) / 2)
-			return freq_table[i].frequency;
-		i++;
-	}
-
-	return freq_table[i].frequency;
-}
-
 static int dbx500_cpufreq_init(struct cpufreq_policy *policy)
 {
+	policy->clk = armss_clk;
 	return cpufreq_generic_init(policy, freq_table, 20 * 1000);
 }
 
 static struct cpufreq_driver dbx500_cpufreq_driver = {
-	.flags  = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS,
+	.flags  = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS |
+			CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify = cpufreq_generic_frequency_table_verify,
 	.target_index = dbx500_cpufreq_target,
-	.get    = dbx500_cpufreq_getspeed,
+	.get    = cpufreq_generic_get,
 	.init   = dbx500_cpufreq_init,
 	.name   = "DBX500",
 	.attr   = cpufreq_generic_attr,
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index f3c22874da75..fcd2914d081a 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -17,6 +17,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/cpufreq.h>
 #include <linux/suspend.h>
+#include <linux/platform_device.h>
 
 #include <plat/cpu.h>
 
@@ -30,11 +31,6 @@ static unsigned int locking_frequency;
 static bool frequency_locked;
 static DEFINE_MUTEX(cpufreq_lock);
 
-static unsigned int exynos_getspeed(unsigned int cpu)
-{
-	return clk_get_rate(exynos_info->cpu_clk) / 1000;
-}
-
 static int exynos_cpufreq_get_index(unsigned int freq)
 {
 	struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
@@ -214,25 +210,29 @@ static struct notifier_block exynos_cpufreq_nb = {
 
 static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
+	policy->clk = exynos_info->cpu_clk;
 	return cpufreq_generic_init(policy, exynos_info->freq_table, 100000);
 }
 
 static struct cpufreq_driver exynos_driver = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= exynos_target,
-	.get		= exynos_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= exynos_cpufreq_cpu_init,
 	.exit		= cpufreq_generic_exit,
 	.name		= "exynos_cpufreq",
 	.attr		= cpufreq_generic_attr,
+#ifdef CONFIG_ARM_EXYNOS_CPU_FREQ_BOOST_SW
+	.boost_supported = true,
+#endif
 #ifdef CONFIG_PM
 	.suspend	= exynos_cpufreq_suspend,
 	.resume		= exynos_cpufreq_resume,
 #endif
 };
 
-static int __init exynos_cpufreq_init(void)
+static int exynos_cpufreq_probe(struct platform_device *pdev)
 {
 	int ret = -EINVAL;
 
@@ -263,7 +263,7 @@ static int __init exynos_cpufreq_init(void)
 		goto err_vdd_arm;
 	}
 
-	locking_frequency = exynos_getspeed(0);
+	locking_frequency = clk_get_rate(exynos_info->cpu_clk) / 1000;
 
 	register_pm_notifier(&exynos_cpufreq_nb);
 
@@ -281,4 +281,12 @@ err_vdd_arm:
 	kfree(exynos_info);
 	return -EINVAL;
 }
-late_initcall(exynos_cpufreq_init);
+
+static struct platform_driver exynos_cpufreq_platdrv = {
+	.driver = {
+		.name	= "exynos-cpufreq",
+		.owner	= THIS_MODULE,
+	},
+	.probe = exynos_cpufreq_probe,
+};
+module_platform_driver(exynos_cpufreq_platdrv);
diff --git a/drivers/cpufreq/exynos4x12-cpufreq.c b/drivers/cpufreq/exynos4x12-cpufreq.c
index 869e48297e28..7c11ace3b3fc 100644
--- a/drivers/cpufreq/exynos4x12-cpufreq.c
+++ b/drivers/cpufreq/exynos4x12-cpufreq.c
@@ -30,7 +30,7 @@ static unsigned int exynos4x12_volt_table[] = {
 };
 
 static struct cpufreq_frequency_table exynos4x12_freq_table[] = {
-	{L0, CPUFREQ_ENTRY_INVALID},
+	{CPUFREQ_BOOST_FREQ, 1500 * 1000},
 	{L1, 1400 * 1000},
 	{L2, 1300 * 1000},
 	{L3, 1200 * 1000},
diff --git a/drivers/cpufreq/exynos5250-cpufreq.c b/drivers/cpufreq/exynos5250-cpufreq.c
index 5ee2ce1ad424..5f90b82a4082 100644
--- a/drivers/cpufreq/exynos5250-cpufreq.c
+++ b/drivers/cpufreq/exynos5250-cpufreq.c
@@ -101,12 +101,12 @@ static void set_clkdiv(unsigned int div_index)
 		cpu_relax();
 }
 
-static void set_apll(unsigned int new_index,
-			     unsigned int old_index)
+static void set_apll(unsigned int index)
 {
-	unsigned int tmp, pdiv;
+	unsigned int tmp;
+	unsigned int freq = apll_freq_5250[index].freq;
 
-	/* 1. MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
+	/* MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
 	clk_set_parent(moutcore, mout_mpll);
 
 	do {
@@ -115,24 +115,9 @@ static void set_apll(unsigned int new_index,
 		tmp &= 0x7;
 	} while (tmp != 0x2);
 
-	/* 2. Set APLL Lock time */
-	pdiv = ((apll_freq_5250[new_index].mps >> 8) & 0x3f);
-
-	__raw_writel((pdiv * 250), EXYNOS5_APLL_LOCK);
+	clk_set_rate(mout_apll, freq * 1000);
 
-	/* 3. Change PLL PMS values */
-	tmp = __raw_readl(EXYNOS5_APLL_CON0);
-	tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
-	tmp |= apll_freq_5250[new_index].mps;
-	__raw_writel(tmp, EXYNOS5_APLL_CON0);
-
-	/* 4. wait_lock_time */
-	do {
-		cpu_relax();
-		tmp = __raw_readl(EXYNOS5_APLL_CON0);
-	} while (!(tmp & (0x1 << 29)));
-
-	/* 5. MUX_CORE_SEL = APLL */
+	/* MUX_CORE_SEL = APLL */
 	clk_set_parent(moutcore, mout_apll);
 
 	do {
@@ -140,55 +125,17 @@ static void set_apll(unsigned int new_index,
 		tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU);
 		tmp &= (0x7 << 16);
 	} while (tmp != (0x1 << 16));
-
-}
-
-static bool exynos5250_pms_change(unsigned int old_index, unsigned int new_index)
-{
-	unsigned int old_pm = apll_freq_5250[old_index].mps >> 8;
-	unsigned int new_pm = apll_freq_5250[new_index].mps >> 8;
-
-	return (old_pm == new_pm) ? 0 : 1;
 }
 
 static void exynos5250_set_frequency(unsigned int old_index,
 				  unsigned int new_index)
 {
-	unsigned int tmp;
-
 	if (old_index > new_index) {
-		if (!exynos5250_pms_change(old_index, new_index)) {
-			/* 1. Change the system clock divider values */
-			set_clkdiv(new_index);
-			/* 2. Change just s value in apll m,p,s value */
-			tmp = __raw_readl(EXYNOS5_APLL_CON0);
-			tmp &= ~(0x7 << 0);
-			tmp |= apll_freq_5250[new_index].mps & 0x7;
-			__raw_writel(tmp, EXYNOS5_APLL_CON0);
-
-		} else {
-			/* Clock Configuration Procedure */
-			/* 1. Change the system clock divider values */
-			set_clkdiv(new_index);
-			/* 2. Change the apll m,p,s value */
-			set_apll(new_index, old_index);
-		}
+		set_clkdiv(new_index);
+		set_apll(new_index);
 	} else if (old_index < new_index) {
-		if (!exynos5250_pms_change(old_index, new_index)) {
-			/* 1. Change just s value in apll m,p,s value */
-			tmp = __raw_readl(EXYNOS5_APLL_CON0);
-			tmp &= ~(0x7 << 0);
-			tmp |= apll_freq_5250[new_index].mps & 0x7;
-			__raw_writel(tmp, EXYNOS5_APLL_CON0);
-			/* 2. Change the system clock divider values */
-			set_clkdiv(new_index);
-		} else {
-			/* Clock Configuration Procedure */
-			/* 1. Change the apll m,p,s value */
-			set_apll(new_index, old_index);
-			/* 2. Change the system clock divider values */
-			set_clkdiv(new_index);
-		}
+		set_apll(new_index);
+		set_clkdiv(new_index);
 	}
 }
 
@@ -221,7 +168,6 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
 	info->volt_table = exynos5250_volt_table;
 	info->freq_table = exynos5250_freq_table;
 	info->set_freq = exynos5250_set_frequency;
-	info->need_apll_change = exynos5250_pms_change;
 
 	return 0;
 
diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c
index 76bef8b078cb..49b756015316 100644
--- a/drivers/cpufreq/exynos5440-cpufreq.c
+++ b/drivers/cpufreq/exynos5440-cpufreq.c
@@ -100,7 +100,6 @@ struct exynos_dvfs_data {
 	struct resource *mem;
 	int irq;
 	struct clk *cpu_clk;
-	unsigned int cur_frequency;
 	unsigned int latency;
 	struct cpufreq_frequency_table *freq_table;
 	unsigned int freq_count;
@@ -165,7 +164,7 @@ static int init_div_table(void)
 	return 0;
 }
 
-static void exynos_enable_dvfs(void)
+static void exynos_enable_dvfs(unsigned int cur_frequency)
 {
 	unsigned int tmp, i, cpu;
 	struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table;
@@ -184,18 +183,18 @@ static void exynos_enable_dvfs(void)
 
 	/* Set initial performance index */
 	for (i = 0; freq_table[i].frequency != CPUFREQ_TABLE_END; i++)
-		if (freq_table[i].frequency == dvfs_info->cur_frequency)
+		if (freq_table[i].frequency == cur_frequency)
 			break;
 
 	if (freq_table[i].frequency == CPUFREQ_TABLE_END) {
 		dev_crit(dvfs_info->dev, "Boot up frequency not supported\n");
 		/* Assign the highest frequency */
 		i = 0;
-		dvfs_info->cur_frequency = freq_table[i].frequency;
+		cur_frequency = freq_table[i].frequency;
 	}
 
 	dev_info(dvfs_info->dev, "Setting dvfs initial frequency = %uKHZ",
-						dvfs_info->cur_frequency);
+						cur_frequency);
 
 	for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++) {
 		tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4);
@@ -209,11 +208,6 @@ static void exynos_enable_dvfs(void)
 				dvfs_info->base + XMU_DVFS_CTRL);
 }
 
-static unsigned int exynos_getspeed(unsigned int cpu)
-{
-	return dvfs_info->cur_frequency;
-}
-
 static int exynos_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	unsigned int tmp;
@@ -222,7 +216,7 @@ static int exynos_target(struct cpufreq_policy *policy, unsigned int index)
 
 	mutex_lock(&cpufreq_lock);
 
-	freqs.old = dvfs_info->cur_frequency;
+	freqs.old = policy->cur;
 	freqs.new = freq_table[index].frequency;
 
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
@@ -250,7 +244,7 @@ static void exynos_cpufreq_work(struct work_struct *work)
 		goto skip_work;
 
 	mutex_lock(&cpufreq_lock);
-	freqs.old = dvfs_info->cur_frequency;
+	freqs.old = policy->cur;
 
 	cur_pstate = __raw_readl(dvfs_info->base + XMU_P_STATUS);
 	if (cur_pstate >> C0_3_PSTATE_VALID_SHIFT & 0x1)
@@ -260,10 +254,9 @@ static void exynos_cpufreq_work(struct work_struct *work)
 
 	if (likely(index < dvfs_info->freq_count)) {
 		freqs.new = freq_table[index].frequency;
-		dvfs_info->cur_frequency = freqs.new;
 	} else {
 		dev_crit(dvfs_info->dev, "New frequency out of range\n");
-		freqs.new = dvfs_info->cur_frequency;
+		freqs.new = freqs.old;
 	}
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
@@ -307,15 +300,17 @@ static void exynos_sort_descend_freq_table(void)
 
 static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
+	policy->clk = dvfs_info->cpu_clk;
 	return cpufreq_generic_init(policy, dvfs_info->freq_table,
 			dvfs_info->latency);
 }
 
 static struct cpufreq_driver exynos_driver = {
-	.flags		= CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION |
+				CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= exynos_target,
-	.get		= exynos_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= exynos_cpufreq_cpu_init,
 	.exit		= cpufreq_generic_exit,
 	.name		= CPUFREQ_NAME,
@@ -335,6 +330,7 @@ static int exynos_cpufreq_probe(struct platform_device *pdev)
 	int ret = -EINVAL;
 	struct device_node *np;
 	struct resource res;
+	unsigned int cur_frequency;
 
 	np =  pdev->dev.of_node;
 	if (!np)
@@ -391,13 +387,13 @@ static int exynos_cpufreq_probe(struct platform_device *pdev)
 		goto err_free_table;
 	}
 
-	dvfs_info->cur_frequency = clk_get_rate(dvfs_info->cpu_clk);
-	if (!dvfs_info->cur_frequency) {
+	cur_frequency = clk_get_rate(dvfs_info->cpu_clk);
+	if (!cur_frequency) {
 		dev_err(dvfs_info->dev, "Failed to get clock rate\n");
 		ret = -EINVAL;
 		goto err_free_table;
 	}
-	dvfs_info->cur_frequency /= 1000;
+	cur_frequency /= 1000;
 
 	INIT_WORK(&dvfs_info->irq_work, exynos_cpufreq_work);
 	ret = devm_request_irq(dvfs_info->dev, dvfs_info->irq,
@@ -414,7 +410,7 @@ static int exynos_cpufreq_probe(struct platform_device *pdev)
 		goto err_free_table;
 	}
 
-	exynos_enable_dvfs();
+	exynos_enable_dvfs(cur_frequency);
 	ret = cpufreq_register_driver(&exynos_driver);
 	if (ret) {
 		dev_err(dvfs_info->dev,
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index 3458d27f63b4..8e54f97899ba 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -32,6 +32,10 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
 
 			continue;
 		}
+		if (!cpufreq_boost_enabled()
+		    && table[i].driver_data == CPUFREQ_BOOST_FREQ)
+			continue;
+
 		pr_debug("table entry %u: %u kHz, %u driver_data\n",
 					i, freq, table[i].driver_data);
 		if (freq < min_freq)
@@ -178,11 +182,34 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
 
+int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
+		unsigned int freq)
+{
+	struct cpufreq_frequency_table *table;
+	int i;
+
+	table = cpufreq_frequency_get_table(policy->cpu);
+	if (unlikely(!table)) {
+		pr_debug("%s: Unable to find frequency table\n", __func__);
+		return -ENOENT;
+	}
+
+	for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
+		if (table[i].frequency == freq)
+			return i;
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
+
 static DEFINE_PER_CPU(struct cpufreq_frequency_table *, cpufreq_show_table);
+
 /**
  * show_available_freqs - show available frequencies for the specified CPU
  */
-static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
+static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
+				    bool show_boost)
 {
 	unsigned int i = 0;
 	unsigned int cpu = policy->cpu;
@@ -197,6 +224,20 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
 	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
 		if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
 			continue;
+		/*
+		 * show_boost = true and driver_data = BOOST freq
+		 * display BOOST freqs
+		 *
+		 * show_boost = false and driver_data = BOOST freq
+		 * show_boost = true and driver_data != BOOST freq
+		 * continue - do not display anything
+		 *
+		 * show_boost = false and driver_data != BOOST freq
+		 * display NON BOOST freqs
+		 */
+		if (show_boost ^ (table[i].driver_data == CPUFREQ_BOOST_FREQ))
+			continue;
+
 		count += sprintf(&buf[count], "%d ", table[i].frequency);
 	}
 	count += sprintf(&buf[count], "\n");
@@ -205,16 +246,39 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
 
 }
 
-struct freq_attr cpufreq_freq_attr_scaling_available_freqs = {
-	.attr = { .name = "scaling_available_frequencies",
-		  .mode = 0444,
-		},
-	.show = show_available_freqs,
-};
+#define cpufreq_attr_available_freq(_name)	  \
+struct freq_attr cpufreq_freq_attr_##_name##_freqs =     \
+__ATTR_RO(_name##_frequencies)
+
+/**
+ * show_scaling_available_frequencies - show available normal frequencies for
+ * the specified CPU
+ */
+static ssize_t scaling_available_frequencies_show(struct cpufreq_policy *policy,
+						  char *buf)
+{
+	return show_available_freqs(policy, buf, false);
+}
+cpufreq_attr_available_freq(scaling_available);
 EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
 
+/**
+ * show_available_boost_freqs - show available boost frequencies for
+ * the specified CPU
+ */
+static ssize_t scaling_boost_frequencies_show(struct cpufreq_policy *policy,
+					      char *buf)
+{
+	return show_available_freqs(policy, buf, true);
+}
+cpufreq_attr_available_freq(scaling_boost);
+EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_boost_freqs);
+
 struct freq_attr *cpufreq_generic_attr[] = {
 	&cpufreq_freq_attr_scaling_available_freqs,
+#ifdef CONFIG_CPU_FREQ_BOOST_SW
+	&cpufreq_freq_attr_scaling_boost_freqs,
+#endif
 	NULL,
 };
 EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 4b3f18e5f36b..ce69059be1fc 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -35,10 +35,8 @@ static struct device *cpu_dev;
 static struct cpufreq_frequency_table *freq_table;
 static unsigned int transition_latency;
 
-static unsigned int imx6q_get_speed(unsigned int cpu)
-{
-	return clk_get_rate(arm_clk) / 1000;
-}
+static u32 *imx6_soc_volt;
+static u32 soc_opp_count;
 
 static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
@@ -69,23 +67,22 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 
 	/* scaling up?  scale voltage before frequency */
 	if (new_freq > old_freq) {
+		ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
+		if (ret) {
+			dev_err(cpu_dev, "failed to scale vddpu up: %d\n", ret);
+			return ret;
+		}
+		ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
+		if (ret) {
+			dev_err(cpu_dev, "failed to scale vddsoc up: %d\n", ret);
+			return ret;
+		}
 		ret = regulator_set_voltage_tol(arm_reg, volt, 0);
 		if (ret) {
 			dev_err(cpu_dev,
 				"failed to scale vddarm up: %d\n", ret);
 			return ret;
 		}
-
-		/*
-		 * Need to increase vddpu and vddsoc for safety
-		 * if we are about to run at 1.2 GHz.
-		 */
-		if (new_freq == FREQ_1P2_GHZ / 1000) {
-			regulator_set_voltage_tol(pu_reg,
-					PU_SOC_VOLTAGE_HIGH, 0);
-			regulator_set_voltage_tol(soc_reg,
-					PU_SOC_VOLTAGE_HIGH, 0);
-		}
 	}
 
 	/*
@@ -120,12 +117,15 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 				 "failed to scale vddarm down: %d\n", ret);
 			ret = 0;
 		}
-
-		if (old_freq == FREQ_1P2_GHZ / 1000) {
-			regulator_set_voltage_tol(pu_reg,
-					PU_SOC_VOLTAGE_NORMAL, 0);
-			regulator_set_voltage_tol(soc_reg,
-					PU_SOC_VOLTAGE_NORMAL, 0);
+		ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
+		if (ret) {
+			dev_warn(cpu_dev, "failed to scale vddsoc down: %d\n", ret);
+			ret = 0;
+		}
+		ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
+		if (ret) {
+			dev_warn(cpu_dev, "failed to scale vddpu down: %d\n", ret);
+			ret = 0;
 		}
 	}
 
@@ -134,13 +134,15 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 
 static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
 {
+	policy->clk = arm_clk;
 	return cpufreq_generic_init(policy, freq_table, transition_latency);
 }
 
 static struct cpufreq_driver imx6q_cpufreq_driver = {
+	.flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify = cpufreq_generic_frequency_table_verify,
 	.target_index = imx6q_set_target,
-	.get = imx6q_get_speed,
+	.get = cpufreq_generic_get,
 	.init = imx6q_cpufreq_init,
 	.exit = cpufreq_generic_exit,
 	.name = "imx6q-cpufreq",
@@ -153,6 +155,9 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 	struct dev_pm_opp *opp;
 	unsigned long min_volt, max_volt;
 	int num, ret;
+	const struct property *prop;
+	const __be32 *val;
+	u32 nr, i, j;
 
 	cpu_dev = get_cpu_device(0);
 	if (!cpu_dev) {
@@ -187,12 +192,25 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 		goto put_node;
 	}
 
-	/* We expect an OPP table supplied by platform */
+	/*
+	 * We expect an OPP table supplied by platform.
+	 * Just, incase the platform did not supply the OPP
+	 * table, it will try to get it.
+	 */
 	num = dev_pm_opp_get_opp_count(cpu_dev);
 	if (num < 0) {
-		ret = num;
-		dev_err(cpu_dev, "no OPP table is found: %d\n", ret);
-		goto put_node;
+		ret = of_init_opp_table(cpu_dev);
+		if (ret < 0) {
+			dev_err(cpu_dev, "failed to init OPP table: %d\n", ret);
+			goto put_node;
+		}
+
+		num = dev_pm_opp_get_opp_count(cpu_dev);
+		if (num < 0) {
+			ret = num;
+			dev_err(cpu_dev, "no OPP table is found: %d\n", ret);
+			goto put_node;
+		}
 	}
 
 	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
@@ -201,10 +219,62 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 		goto put_node;
 	}
 
+	/* Make imx6_soc_volt array's size same as arm opp number */
+	imx6_soc_volt = devm_kzalloc(cpu_dev, sizeof(*imx6_soc_volt) * num, GFP_KERNEL);
+	if (imx6_soc_volt == NULL) {
+		ret = -ENOMEM;
+		goto free_freq_table;
+	}
+
+	prop = of_find_property(np, "fsl,soc-operating-points", NULL);
+	if (!prop || !prop->value)
+		goto soc_opp_out;
+
+	/*
+	 * Each OPP is a set of tuples consisting of frequency and
+	 * voltage like <freq-kHz vol-uV>.
+	 */
+	nr = prop->length / sizeof(u32);
+	if (nr % 2 || (nr / 2) < num)
+		goto soc_opp_out;
+
+	for (j = 0; j < num; j++) {
+		val = prop->value;
+		for (i = 0; i < nr / 2; i++) {
+			unsigned long freq = be32_to_cpup(val++);
+			unsigned long volt = be32_to_cpup(val++);
+			if (freq_table[j].frequency == freq) {
+				imx6_soc_volt[soc_opp_count++] = volt;
+				break;
+			}
+		}
+	}
+
+soc_opp_out:
+	/* use fixed soc opp volt if no valid soc opp info found in dtb */
+	if (soc_opp_count != num) {
+		dev_warn(cpu_dev, "can NOT find valid fsl,soc-operating-points property in dtb, use default value!\n");
+		for (j = 0; j < num; j++)
+			imx6_soc_volt[j] = PU_SOC_VOLTAGE_NORMAL;
+		if (freq_table[num - 1].frequency * 1000 == FREQ_1P2_GHZ)
+			imx6_soc_volt[num - 1] = PU_SOC_VOLTAGE_HIGH;
+	}
+
 	if (of_property_read_u32(np, "clock-latency", &transition_latency))
 		transition_latency = CPUFREQ_ETERNAL;
 
 	/*
+	 * Calculate the ramp time for max voltage change in the
+	 * VDDSOC and VDDPU regulators.
+	 */
+	ret = regulator_set_voltage_time(soc_reg, imx6_soc_volt[0], imx6_soc_volt[num - 1]);
+	if (ret > 0)
+		transition_latency += ret * 1000;
+	ret = regulator_set_voltage_time(pu_reg, imx6_soc_volt[0], imx6_soc_volt[num - 1]);
+	if (ret > 0)
+		transition_latency += ret * 1000;
+
+	/*
 	 * OPP is maintained in order of increasing frequency, and
 	 * freq_table initialised from OPP is therefore sorted in the
 	 * same order.
@@ -221,18 +291,6 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 	if (ret > 0)
 		transition_latency += ret * 1000;
 
-	/* Count vddpu and vddsoc latency in for 1.2 GHz support */
-	if (freq_table[num].frequency == FREQ_1P2_GHZ / 1000) {
-		ret = regulator_set_voltage_time(pu_reg, PU_SOC_VOLTAGE_NORMAL,
-						 PU_SOC_VOLTAGE_HIGH);
-		if (ret > 0)
-			transition_latency += ret * 1000;
-		ret = regulator_set_voltage_time(soc_reg, PU_SOC_VOLTAGE_NORMAL,
-						 PU_SOC_VOLTAGE_HIGH);
-		if (ret > 0)
-			transition_latency += ret * 1000;
-	}
-
 	ret = cpufreq_register_driver(&imx6q_cpufreq_driver);
 	if (ret) {
 		dev_err(cpu_dev, "failed register driver: %d\n", ret);
diff --git a/drivers/cpufreq/integrator-cpufreq.c b/drivers/cpufreq/integrator-cpufreq.c
index 7d8ab000d317..0e27844e8c2d 100644
--- a/drivers/cpufreq/integrator-cpufreq.c
+++ b/drivers/cpufreq/integrator-cpufreq.c
@@ -190,6 +190,7 @@ static int integrator_cpufreq_init(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver integrator_driver = {
+	.flags		= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= integrator_verify_policy,
 	.target		= integrator_set_target,
 	.get		= integrator_get,
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index d51f17ed691e..7e257b233602 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -35,6 +35,7 @@
 #define SAMPLE_COUNT		3
 
 #define BYT_RATIOS	0x66a
+#define BYT_VIDS        0x66b
 
 #define FRAC_BITS 8
 #define int_tofp(X) ((int64_t)(X) << FRAC_BITS)
@@ -50,6 +51,8 @@ static inline int32_t div_fp(int32_t x, int32_t y)
 	return div_s64((int64_t)x << FRAC_BITS, (int64_t)y);
 }
 
+static u64 energy_divisor;
+
 struct sample {
 	int32_t core_pct_busy;
 	u64 aperf;
@@ -64,6 +67,12 @@ struct pstate_data {
 	int	turbo_pstate;
 };
 
+struct vid_data {
+	int32_t min;
+	int32_t max;
+	int32_t ratio;
+};
+
 struct _pid {
 	int setpoint;
 	int32_t integral;
@@ -82,10 +91,9 @@ struct cpudata {
 	struct timer_list timer;
 
 	struct pstate_data pstate;
+	struct vid_data vid;
 	struct _pid pid;
 
-	int min_pstate_count;
-
 	u64	prev_aperf;
 	u64	prev_mperf;
 	int	sample_ptr;
@@ -106,7 +114,8 @@ struct pstate_funcs {
 	int (*get_max)(void);
 	int (*get_min)(void);
 	int (*get_turbo)(void);
-	void (*set)(int pstate);
+	void (*set)(struct cpudata*, int pstate);
+	void (*get_vid)(struct cpudata *);
 };
 
 struct cpu_defaults {
@@ -358,6 +367,42 @@ static int byt_get_max_pstate(void)
 	return (value >> 16) & 0xFF;
 }
 
+static void byt_set_pstate(struct cpudata *cpudata, int pstate)
+{
+	u64 val;
+	int32_t vid_fp;
+	u32 vid;
+
+	val = pstate << 8;
+	if (limits.no_turbo)
+		val |= (u64)1 << 32;
+
+	vid_fp = cpudata->vid.min + mul_fp(
+		int_tofp(pstate - cpudata->pstate.min_pstate),
+		cpudata->vid.ratio);
+
+	vid_fp = clamp_t(int32_t, vid_fp, cpudata->vid.min, cpudata->vid.max);
+	vid = fp_toint(vid_fp);
+
+	val |= vid;
+
+	wrmsrl(MSR_IA32_PERF_CTL, val);
+}
+
+static void byt_get_vid(struct cpudata *cpudata)
+{
+	u64 value;
+
+	rdmsrl(BYT_VIDS, value);
+	cpudata->vid.min = int_tofp((value >> 8) & 0x7f);
+	cpudata->vid.max = int_tofp((value >> 16) & 0x7f);
+	cpudata->vid.ratio = div_fp(
+		cpudata->vid.max - cpudata->vid.min,
+		int_tofp(cpudata->pstate.max_pstate -
+			cpudata->pstate.min_pstate));
+}
+
+
 static int core_get_min_pstate(void)
 {
 	u64 value;
@@ -384,7 +429,7 @@ static int core_get_turbo_pstate(void)
 	return ret;
 }
 
-static void core_set_pstate(int pstate)
+static void core_set_pstate(struct cpudata *cpudata, int pstate)
 {
 	u64 val;
 
@@ -425,7 +470,8 @@ static struct cpu_defaults byt_params = {
 		.get_max = byt_get_max_pstate,
 		.get_min = byt_get_min_pstate,
 		.get_turbo = byt_get_max_pstate,
-		.set = core_set_pstate,
+		.set = byt_set_pstate,
+		.get_vid = byt_get_vid,
 	},
 };
 
@@ -462,7 +508,7 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
 
 	cpu->pstate.current_pstate = pstate;
 
-	pstate_funcs.set(pstate);
+	pstate_funcs.set(cpu, pstate);
 }
 
 static inline void intel_pstate_pstate_increase(struct cpudata *cpu, int steps)
@@ -488,6 +534,9 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
 	cpu->pstate.max_pstate = pstate_funcs.get_max();
 	cpu->pstate.turbo_pstate = pstate_funcs.get_turbo();
 
+	if (pstate_funcs.get_vid)
+		pstate_funcs.get_vid(cpu);
+
 	/*
 	 * goto max pstate so we don't slow up boot if we are built-in if we are
 	 * a module we will take care of it during normal operation
@@ -512,6 +561,7 @@ static inline void intel_pstate_sample(struct cpudata *cpu)
 
 	rdmsrl(MSR_IA32_APERF, aperf);
 	rdmsrl(MSR_IA32_MPERF, mperf);
+
 	cpu->sample_ptr = (cpu->sample_ptr + 1) % SAMPLE_COUNT;
 	cpu->samples[cpu->sample_ptr].aperf = aperf;
 	cpu->samples[cpu->sample_ptr].mperf = mperf;
@@ -556,6 +606,7 @@ static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
 	ctl = pid_calc(pid, busy_scaled);
 
 	steps = abs(ctl);
+
 	if (ctl < 0)
 		intel_pstate_pstate_increase(cpu, steps);
 	else
@@ -565,17 +616,23 @@ static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
 static void intel_pstate_timer_func(unsigned long __data)
 {
 	struct cpudata *cpu = (struct cpudata *) __data;
+	struct sample *sample;
+	u64 energy;
 
 	intel_pstate_sample(cpu);
+
+	sample = &cpu->samples[cpu->sample_ptr];
+	rdmsrl(MSR_PKG_ENERGY_STATUS, energy);
+
 	intel_pstate_adjust_busy_pstate(cpu);
 
-	if (cpu->pstate.current_pstate == cpu->pstate.min_pstate) {
-		cpu->min_pstate_count++;
-		if (!(cpu->min_pstate_count % 5)) {
-			intel_pstate_set_pstate(cpu, cpu->pstate.max_pstate);
-		}
-	} else
-		cpu->min_pstate_count = 0;
+	trace_pstate_sample(fp_toint(sample->core_pct_busy),
+			fp_toint(intel_pstate_get_scaled_busy(cpu)),
+			cpu->pstate.current_pstate,
+			sample->mperf,
+			sample->aperf,
+			div64_u64(energy, energy_divisor),
+			sample->freq);
 
 	intel_pstate_set_sample_time(cpu);
 }
@@ -782,6 +839,7 @@ static void copy_cpu_funcs(struct pstate_funcs *funcs)
 	pstate_funcs.get_min   = funcs->get_min;
 	pstate_funcs.get_turbo = funcs->get_turbo;
 	pstate_funcs.set       = funcs->set;
+	pstate_funcs.get_vid   = funcs->get_vid;
 }
 
 #if IS_ENABLED(CONFIG_ACPI)
@@ -855,6 +913,7 @@ static int __init intel_pstate_init(void)
 	int cpu, rc = 0;
 	const struct x86_cpu_id *id;
 	struct cpu_defaults *cpu_info;
+	u64 units;
 
 	if (no_load)
 		return -ENODEV;
@@ -888,8 +947,12 @@ static int __init intel_pstate_init(void)
 	if (rc)
 		goto out;
 
+	rdmsrl(MSR_RAPL_POWER_UNIT, units);
+	energy_divisor = 1 << ((units >> 8) & 0x1f); /* bits{12:8} */
+
 	intel_pstate_debug_expose_params();
 	intel_pstate_sysfs_expose_params();
+
 	return rc;
 out:
 	get_online_cpus();
diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c
index 0767a4e29dfe..eb7abe345b50 100644
--- a/drivers/cpufreq/kirkwood-cpufreq.c
+++ b/drivers/cpufreq/kirkwood-cpufreq.c
@@ -97,6 +97,7 @@ static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver kirkwood_cpufreq_driver = {
+	.flags	= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.get	= kirkwood_cpufreq_get_cpu_frequency,
 	.verify	= cpufreq_generic_frequency_table_verify,
 	.target_index = kirkwood_cpufreq_target,
diff --git a/drivers/cpufreq/loongson2_cpufreq.c b/drivers/cpufreq/loongson2_cpufreq.c
index a43609218105..b6581abc9207 100644
--- a/drivers/cpufreq/loongson2_cpufreq.c
+++ b/drivers/cpufreq/loongson2_cpufreq.c
@@ -24,8 +24,6 @@
 
 static uint nowait;
 
-static struct clk *cpuclk;
-
 static void (*saved_cpu_wait) (void);
 
 static int loongson2_cpu_freq_notifier(struct notifier_block *nb,
@@ -44,11 +42,6 @@ static int loongson2_cpu_freq_notifier(struct notifier_block *nb,
 	return 0;
 }
 
-static unsigned int loongson2_cpufreq_get(unsigned int cpu)
-{
-	return clk_get_rate(cpuclk);
-}
-
 /*
  * Here we notify other drivers of the proposed change and the final change.
  */
@@ -69,13 +62,14 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy,
 	set_cpus_allowed_ptr(current, &cpus_allowed);
 
 	/* setting the cpu frequency */
-	clk_set_rate(cpuclk, freq);
+	clk_set_rate(policy->clk, freq);
 
 	return 0;
 }
 
 static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
+	static struct clk *cpuclk;
 	int i;
 	unsigned long rate;
 	int ret;
@@ -104,13 +98,14 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		return ret;
 	}
 
+	policy->clk = cpuclk;
 	return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
 }
 
 static int loongson2_cpufreq_exit(struct cpufreq_policy *policy)
 {
 	cpufreq_frequency_table_put_attr(policy->cpu);
-	clk_put(cpuclk);
+	clk_put(policy->clk);
 	return 0;
 }
 
@@ -119,7 +114,7 @@ static struct cpufreq_driver loongson2_cpufreq_driver = {
 	.init = loongson2_cpufreq_cpu_init,
 	.verify = cpufreq_generic_frequency_table_verify,
 	.target_index = loongson2_cpufreq_target,
-	.get = loongson2_cpufreq_get,
+	.get = cpufreq_generic_get,
 	.exit = loongson2_cpufreq_exit,
 	.attr = cpufreq_generic_attr,
 };
diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
index a0acd0bfba40..590f5b66d181 100644
--- a/drivers/cpufreq/omap-cpufreq.c
+++ b/drivers/cpufreq/omap-cpufreq.c
@@ -36,21 +36,9 @@
 
 static struct cpufreq_frequency_table *freq_table;
 static atomic_t freq_table_users = ATOMIC_INIT(0);
-static struct clk *mpu_clk;
 static struct device *mpu_dev;
 static struct regulator *mpu_reg;
 
-static unsigned int omap_getspeed(unsigned int cpu)
-{
-	unsigned long rate;
-
-	if (cpu >= NR_CPUS)
-		return 0;
-
-	rate = clk_get_rate(mpu_clk) / 1000;
-	return rate;
-}
-
 static int omap_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	int r, ret;
@@ -58,11 +46,11 @@ static int omap_target(struct cpufreq_policy *policy, unsigned int index)
 	unsigned long freq, volt = 0, volt_old = 0, tol = 0;
 	unsigned int old_freq, new_freq;
 
-	old_freq = omap_getspeed(policy->cpu);
+	old_freq = policy->cur;
 	new_freq = freq_table[index].frequency;
 
 	freq = new_freq * 1000;
-	ret = clk_round_rate(mpu_clk, freq);
+	ret = clk_round_rate(policy->clk, freq);
 	if (IS_ERR_VALUE(ret)) {
 		dev_warn(mpu_dev,
 			 "CPUfreq: Cannot find matching frequency for %lu\n",
@@ -100,7 +88,7 @@ static int omap_target(struct cpufreq_policy *policy, unsigned int index)
 		}
 	}
 
-	ret = clk_set_rate(mpu_clk, new_freq * 1000);
+	ret = clk_set_rate(policy->clk, new_freq * 1000);
 
 	/* scaling down?  scale voltage after frequency */
 	if (mpu_reg && (new_freq < old_freq)) {
@@ -108,7 +96,7 @@ static int omap_target(struct cpufreq_policy *policy, unsigned int index)
 		if (r < 0) {
 			dev_warn(mpu_dev, "%s: unable to scale voltage down.\n",
 				 __func__);
-			clk_set_rate(mpu_clk, old_freq * 1000);
+			clk_set_rate(policy->clk, old_freq * 1000);
 			return r;
 		}
 	}
@@ -126,9 +114,9 @@ static int omap_cpu_init(struct cpufreq_policy *policy)
 {
 	int result;
 
-	mpu_clk = clk_get(NULL, "cpufreq_ck");
-	if (IS_ERR(mpu_clk))
-		return PTR_ERR(mpu_clk);
+	policy->clk = clk_get(NULL, "cpufreq_ck");
+	if (IS_ERR(policy->clk))
+		return PTR_ERR(policy->clk);
 
 	if (!freq_table) {
 		result = dev_pm_opp_init_cpufreq_table(mpu_dev, &freq_table);
@@ -149,7 +137,7 @@ static int omap_cpu_init(struct cpufreq_policy *policy)
 
 	freq_table_free();
 fail:
-	clk_put(mpu_clk);
+	clk_put(policy->clk);
 	return result;
 }
 
@@ -157,15 +145,15 @@ static int omap_cpu_exit(struct cpufreq_policy *policy)
 {
 	cpufreq_frequency_table_put_attr(policy->cpu);
 	freq_table_free();
-	clk_put(mpu_clk);
+	clk_put(policy->clk);
 	return 0;
 }
 
 static struct cpufreq_driver omap_driver = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= omap_target,
-	.get		= omap_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= omap_cpu_init,
 	.exit		= omap_cpu_exit,
 	.name		= "omap",
diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c
index e2b4f40ff69a..1c0f1067af73 100644
--- a/drivers/cpufreq/pcc-cpufreq.c
+++ b/drivers/cpufreq/pcc-cpufreq.c
@@ -213,6 +213,7 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy,
 		cpu, target_freq,
 		(pcch_virt_addr + pcc_cpu_data->input_offset));
 
+	freqs.old = policy->cur;
 	freqs.new = target_freq;
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
 
@@ -228,25 +229,20 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy,
 	memset_io((pcch_virt_addr + pcc_cpu_data->input_offset), 0, BUF_SZ);
 
 	status = ioread16(&pcch_hdr->status);
+	iowrite16(0, &pcch_hdr->status);
+
+	cpufreq_notify_post_transition(policy, &freqs, status != CMD_COMPLETE);
+	spin_unlock(&pcc_lock);
+
 	if (status != CMD_COMPLETE) {
 		pr_debug("target: FAILED for cpu %d, with status: 0x%x\n",
 			cpu, status);
-		goto cmd_incomplete;
+		return -EINVAL;
 	}
-	iowrite16(0, &pcch_hdr->status);
 
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 	pr_debug("target: was SUCCESSFUL for cpu %d\n", cpu);
-	spin_unlock(&pcc_lock);
 
 	return 0;
-
-cmd_incomplete:
-	freqs.new = freqs.old;
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-	iowrite16(0, &pcch_hdr->status);
-	spin_unlock(&pcc_lock);
-	return -EINVAL;
 }
 
 static int pcc_get_offset(int cpu)
diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c
index 643e7952cad3..b9a444e358b5 100644
--- a/drivers/cpufreq/powernow-k6.c
+++ b/drivers/cpufreq/powernow-k6.c
@@ -26,41 +26,108 @@
 static unsigned int                     busfreq;   /* FSB, in 10 kHz */
 static unsigned int                     max_multiplier;
 
+static unsigned int			param_busfreq = 0;
+static unsigned int			param_max_multiplier = 0;
+
+module_param_named(max_multiplier, param_max_multiplier, uint, S_IRUGO);
+MODULE_PARM_DESC(max_multiplier, "Maximum multiplier (allowed values: 20 30 35 40 45 50 55 60)");
+
+module_param_named(bus_frequency, param_busfreq, uint, S_IRUGO);
+MODULE_PARM_DESC(bus_frequency, "Bus frequency in kHz");
 
 /* Clock ratio multiplied by 10 - see table 27 in AMD#23446 */
 static struct cpufreq_frequency_table clock_ratio[] = {
-	{45,  /* 000 -> 4.5x */ 0},
+	{60,  /* 110 -> 6.0x */ 0},
+	{55,  /* 011 -> 5.5x */ 0},
 	{50,  /* 001 -> 5.0x */ 0},
+	{45,  /* 000 -> 4.5x */ 0},
 	{40,  /* 010 -> 4.0x */ 0},
-	{55,  /* 011 -> 5.5x */ 0},
-	{20,  /* 100 -> 2.0x */ 0},
-	{30,  /* 101 -> 3.0x */ 0},
-	{60,  /* 110 -> 6.0x */ 0},
 	{35,  /* 111 -> 3.5x */ 0},
+	{30,  /* 101 -> 3.0x */ 0},
+	{20,  /* 100 -> 2.0x */ 0},
 	{0, CPUFREQ_TABLE_END}
 };
 
+static const u8 index_to_register[8] = { 6, 3, 1, 0, 2, 7, 5, 4 };
+static const u8 register_to_index[8] = { 3, 2, 4, 1, 7, 6, 0, 5 };
+
+static const struct {
+	unsigned freq;
+	unsigned mult;
+} usual_frequency_table[] = {
+	{ 400000, 40 },	// 100   * 4
+	{ 450000, 45 }, // 100   * 4.5
+	{ 475000, 50 }, //  95   * 5
+	{ 500000, 50 }, // 100   * 5
+	{ 506250, 45 }, // 112.5 * 4.5
+	{ 533500, 55 }, //  97   * 5.5
+	{ 550000, 55 }, // 100   * 5.5
+	{ 562500, 50 }, // 112.5 * 5
+	{ 570000, 60 }, //  95   * 6
+	{ 600000, 60 }, // 100   * 6
+	{ 618750, 55 }, // 112.5 * 5.5
+	{ 660000, 55 }, // 120   * 5.5
+	{ 675000, 60 }, // 112.5 * 6
+	{ 720000, 60 }, // 120   * 6
+};
+
+#define FREQ_RANGE		3000
 
 /**
  * powernow_k6_get_cpu_multiplier - returns the current FSB multiplier
  *
- *   Returns the current setting of the frequency multiplier. Core clock
+ * Returns the current setting of the frequency multiplier. Core clock
  * speed is frequency of the Front-Side Bus multiplied with this value.
  */
 static int powernow_k6_get_cpu_multiplier(void)
 {
-	u64 invalue = 0;
+	unsigned long invalue = 0;
 	u32 msrval;
 
+	local_irq_disable();
+
 	msrval = POWERNOW_IOPORT + 0x1;
 	wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
 	invalue = inl(POWERNOW_IOPORT + 0x8);
 	msrval = POWERNOW_IOPORT + 0x0;
 	wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
 
-	return clock_ratio[(invalue >> 5)&7].driver_data;
+	local_irq_enable();
+
+	return clock_ratio[register_to_index[(invalue >> 5)&7]].driver_data;
 }
 
+static void powernow_k6_set_cpu_multiplier(unsigned int best_i)
+{
+	unsigned long outvalue, invalue;
+	unsigned long msrval;
+	unsigned long cr0;
+
+	/* we now need to transform best_i to the BVC format, see AMD#23446 */
+
+	/*
+	 * The processor doesn't respond to inquiry cycles while changing the
+	 * frequency, so we must disable cache.
+	 */
+	local_irq_disable();
+	cr0 = read_cr0();
+	write_cr0(cr0 | X86_CR0_CD);
+	wbinvd();
+
+	outvalue = (1<<12) | (1<<10) | (1<<9) | (index_to_register[best_i]<<5);
+
+	msrval = POWERNOW_IOPORT + 0x1;
+	wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
+	invalue = inl(POWERNOW_IOPORT + 0x8);
+	invalue = invalue & 0x1f;
+	outvalue = outvalue | invalue;
+	outl(outvalue, (POWERNOW_IOPORT + 0x8));
+	msrval = POWERNOW_IOPORT + 0x0;
+	wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
+
+	write_cr0(cr0);
+	local_irq_enable();
+}
 
 /**
  * powernow_k6_target - set the PowerNow! multiplier
@@ -71,8 +138,6 @@ static int powernow_k6_get_cpu_multiplier(void)
 static int powernow_k6_target(struct cpufreq_policy *policy,
 		unsigned int best_i)
 {
-	unsigned long outvalue = 0, invalue = 0;
-	unsigned long msrval;
 	struct cpufreq_freqs freqs;
 
 	if (clock_ratio[best_i].driver_data > max_multiplier) {
@@ -85,35 +150,63 @@ static int powernow_k6_target(struct cpufreq_policy *policy,
 
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
 
-	/* we now need to transform best_i to the BVC format, see AMD#23446 */
-
-	outvalue = (1<<12) | (1<<10) | (1<<9) | (best_i<<5);
-
-	msrval = POWERNOW_IOPORT + 0x1;
-	wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
-	invalue = inl(POWERNOW_IOPORT + 0x8);
-	invalue = invalue & 0xf;
-	outvalue = outvalue | invalue;
-	outl(outvalue , (POWERNOW_IOPORT + 0x8));
-	msrval = POWERNOW_IOPORT + 0x0;
-	wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
+	powernow_k6_set_cpu_multiplier(best_i);
 
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
 	return 0;
 }
 
-
 static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
 {
 	unsigned int i, f;
+	unsigned khz;
 
 	if (policy->cpu != 0)
 		return -ENODEV;
 
-	/* get frequencies */
-	max_multiplier = powernow_k6_get_cpu_multiplier();
-	busfreq = cpu_khz / max_multiplier;
+	max_multiplier = 0;
+	khz = cpu_khz;
+	for (i = 0; i < ARRAY_SIZE(usual_frequency_table); i++) {
+		if (khz >= usual_frequency_table[i].freq - FREQ_RANGE &&
+		    khz <= usual_frequency_table[i].freq + FREQ_RANGE) {
+			khz = usual_frequency_table[i].freq;
+			max_multiplier = usual_frequency_table[i].mult;
+			break;
+		}
+	}
+	if (param_max_multiplier) {
+		for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
+			if (clock_ratio[i].driver_data == param_max_multiplier) {
+				max_multiplier = param_max_multiplier;
+				goto have_max_multiplier;
+			}
+		}
+		printk(KERN_ERR "powernow-k6: invalid max_multiplier parameter, valid parameters 20, 30, 35, 40, 45, 50, 55, 60\n");
+		return -EINVAL;
+	}
+
+	if (!max_multiplier) {
+		printk(KERN_WARNING "powernow-k6: unknown frequency %u, cannot determine current multiplier\n", khz);
+		printk(KERN_WARNING "powernow-k6: use module parameters max_multiplier and bus_frequency\n");
+		return -EOPNOTSUPP;
+	}
+
+have_max_multiplier:
+	param_max_multiplier = max_multiplier;
+
+	if (param_busfreq) {
+		if (param_busfreq >= 50000 && param_busfreq <= 150000) {
+			busfreq = param_busfreq / 10;
+			goto have_busfreq;
+		}
+		printk(KERN_ERR "powernow-k6: invalid bus_frequency parameter, allowed range 50000 - 150000 kHz\n");
+		return -EINVAL;
+	}
+
+	busfreq = khz / max_multiplier;
+have_busfreq:
+	param_busfreq = busfreq * 10;
 
 	/* table init */
 	for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
@@ -125,7 +218,7 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
 	}
 
 	/* cpuinfo and default policy values */
-	policy->cpuinfo.transition_latency = 200000;
+	policy->cpuinfo.transition_latency = 500000;
 
 	return cpufreq_table_validate_and_show(policy, clock_ratio);
 }
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 0023c7d40a51..e10b646634d7 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -964,14 +964,9 @@ static int transition_frequency_fidvid(struct powernow_k8_data *data,
 	cpufreq_cpu_put(policy);
 
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
 	res = transition_fid_vid(data, fid, vid);
-	if (res)
-		freqs.new = freqs.old;
-	else
-		freqs.new = find_khz_freq_from_fid(data->currfid);
+	cpufreq_notify_post_transition(policy, &freqs, res);
 
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 	return res;
 }
 
diff --git a/drivers/cpufreq/ppc-corenet-cpufreq.c b/drivers/cpufreq/ppc-corenet-cpufreq.c
index 3f7be46d2b27..051000f44ca2 100644
--- a/drivers/cpufreq/ppc-corenet-cpufreq.c
+++ b/drivers/cpufreq/ppc-corenet-cpufreq.c
@@ -24,12 +24,10 @@
 
 /**
  * struct cpu_data - per CPU data struct
- * @clk: the clk of CPU
  * @parent: the parent node of cpu clock
  * @table: frequency table
  */
 struct cpu_data {
-	struct clk *clk;
 	struct device_node *parent;
 	struct cpufreq_frequency_table *table;
 };
@@ -81,13 +79,6 @@ static inline const struct cpumask *cpu_core_mask(int cpu)
 }
 #endif
 
-static unsigned int corenet_cpufreq_get_speed(unsigned int cpu)
-{
-	struct cpu_data *data = per_cpu(cpu_data, cpu);
-
-	return clk_get_rate(data->clk) / 1000;
-}
-
 /* reduce the duplicated frequencies in frequency table */
 static void freq_table_redup(struct cpufreq_frequency_table *freq_table,
 		int count)
@@ -158,8 +149,8 @@ static int corenet_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		goto err_np;
 	}
 
-	data->clk = of_clk_get(np, 0);
-	if (IS_ERR(data->clk)) {
+	policy->clk = of_clk_get(np, 0);
+	if (IS_ERR(policy->clk)) {
 		pr_err("%s: no clock information\n", __func__);
 		goto err_nomem2;
 	}
@@ -255,7 +246,7 @@ static int corenet_cpufreq_target(struct cpufreq_policy *policy,
 	struct cpu_data *data = per_cpu(cpu_data, policy->cpu);
 
 	parent = of_clk_get(data->parent, data->table[index].driver_data);
-	return clk_set_parent(data->clk, parent);
+	return clk_set_parent(policy->clk, parent);
 }
 
 static struct cpufreq_driver ppc_corenet_cpufreq_driver = {
@@ -265,7 +256,7 @@ static struct cpufreq_driver ppc_corenet_cpufreq_driver = {
 	.exit		= __exit_p(corenet_cpufreq_cpu_exit),
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= corenet_cpufreq_target,
-	.get		= corenet_cpufreq_get_speed,
+	.get		= cpufreq_generic_get,
 	.attr		= cpufreq_generic_attr,
 };
 
diff --git a/drivers/cpufreq/pxa2xx-cpufreq.c b/drivers/cpufreq/pxa2xx-cpufreq.c
index 0a0f4369636a..a9195a86b069 100644
--- a/drivers/cpufreq/pxa2xx-cpufreq.c
+++ b/drivers/cpufreq/pxa2xx-cpufreq.c
@@ -423,6 +423,7 @@ static int pxa_cpufreq_init(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver pxa_cpufreq_driver = {
+	.flags	= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify	= cpufreq_generic_frequency_table_verify,
 	.target_index = pxa_set_target,
 	.init	= pxa_cpufreq_init,
diff --git a/drivers/cpufreq/pxa3xx-cpufreq.c b/drivers/cpufreq/pxa3xx-cpufreq.c
index 93840048dd11..3785687e9d70 100644
--- a/drivers/cpufreq/pxa3xx-cpufreq.c
+++ b/drivers/cpufreq/pxa3xx-cpufreq.c
@@ -201,6 +201,7 @@ static int pxa3xx_cpufreq_init(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver pxa3xx_cpufreq_driver = {
+	.flags		= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= pxa3xx_cpufreq_set,
 	.init		= pxa3xx_cpufreq_init,
diff --git a/drivers/cpufreq/s3c2416-cpufreq.c b/drivers/cpufreq/s3c2416-cpufreq.c
index 8d904a00027b..826b8be23099 100644
--- a/drivers/cpufreq/s3c2416-cpufreq.c
+++ b/drivers/cpufreq/s3c2416-cpufreq.c
@@ -481,7 +481,7 @@ err_hclk:
 }
 
 static struct cpufreq_driver s3c2416_cpufreq_driver = {
-	.flags          = 0,
+	.flags		= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= s3c2416_cpufreq_set_target,
 	.get		= s3c2416_cpufreq_get_speed,
diff --git a/drivers/cpufreq/s3c2440-cpufreq.c b/drivers/cpufreq/s3c2440-cpufreq.c
index 72b2cc8a5a85..f84ed10755b5 100644
--- a/drivers/cpufreq/s3c2440-cpufreq.c
+++ b/drivers/cpufreq/s3c2440-cpufreq.c
@@ -22,8 +22,6 @@
 #include <linux/err.h>
 #include <linux/io.h>
 
-#include <mach/hardware.h>
-
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
@@ -55,7 +53,7 @@ static inline int within_khz(unsigned long a, unsigned long b)
  * specified in @cfg. The values are stored in @cfg for later use
  * by the relevant set routine if the request settings can be reached.
  */
-int s3c2440_cpufreq_calcdivs(struct s3c_cpufreq_config *cfg)
+static int s3c2440_cpufreq_calcdivs(struct s3c_cpufreq_config *cfg)
 {
 	unsigned int hdiv, pdiv;
 	unsigned long hclk, fclk, armclk;
@@ -242,7 +240,7 @@ static int s3c2440_cpufreq_calctable(struct s3c_cpufreq_config *cfg,
 	return ret;
 }
 
-struct s3c_cpufreq_info s3c2440_cpufreq_info = {
+static struct s3c_cpufreq_info s3c2440_cpufreq_info = {
 	.max		= {
 		.fclk	= 400000000,
 		.hclk	= 133333333,
diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c
index 485088253358..25069741b507 100644
--- a/drivers/cpufreq/s3c24xx-cpufreq.c
+++ b/drivers/cpufreq/s3c24xx-cpufreq.c
@@ -355,11 +355,6 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
 	return -EINVAL;
 }
 
-static unsigned int s3c_cpufreq_get(unsigned int cpu)
-{
-	return clk_get_rate(clk_arm) / 1000;
-}
-
 struct clk *s3c_cpufreq_clk_get(struct device *dev, const char *name)
 {
 	struct clk *clk;
@@ -373,6 +368,7 @@ struct clk *s3c_cpufreq_clk_get(struct device *dev, const char *name)
 
 static int s3c_cpufreq_init(struct cpufreq_policy *policy)
 {
+	policy->clk = clk_arm;
 	return cpufreq_generic_init(policy, ftab, cpu_cur.info->latency);
 }
 
@@ -408,7 +404,7 @@ static int s3c_cpufreq_suspend(struct cpufreq_policy *policy)
 {
 	suspend_pll.frequency = clk_get_rate(_clk_mpll);
 	suspend_pll.driver_data = __raw_readl(S3C2410_MPLLCON);
-	suspend_freq = s3c_cpufreq_get(0) * 1000;
+	suspend_freq = clk_get_rate(clk_arm);
 
 	return 0;
 }
@@ -448,9 +444,9 @@ static int s3c_cpufreq_resume(struct cpufreq_policy *policy)
 #endif
 
 static struct cpufreq_driver s3c24xx_driver = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.target		= s3c_cpufreq_target,
-	.get		= s3c_cpufreq_get,
+	.get		= cpufreq_generic_get,
 	.init		= s3c_cpufreq_init,
 	.suspend	= s3c_cpufreq_suspend,
 	.resume		= s3c_cpufreq_resume,
@@ -509,7 +505,7 @@ int __init s3c_cpufreq_setboard(struct s3c_cpufreq_board *board)
 	return 0;
 }
 
-int __init s3c_cpufreq_auto_io(void)
+static int __init s3c_cpufreq_auto_io(void)
 {
 	int ret;
 
diff --git a/drivers/cpufreq/s3c64xx-cpufreq.c b/drivers/cpufreq/s3c64xx-cpufreq.c
index 67e302eeefec..c4226de079ab 100644
--- a/drivers/cpufreq/s3c64xx-cpufreq.c
+++ b/drivers/cpufreq/s3c64xx-cpufreq.c
@@ -19,7 +19,6 @@
 #include <linux/regulator/consumer.h>
 #include <linux/module.h>
 
-static struct clk *armclk;
 static struct regulator *vddarm;
 static unsigned long regulator_latency;
 
@@ -54,14 +53,6 @@ static struct cpufreq_frequency_table s3c64xx_freq_table[] = {
 };
 #endif
 
-static unsigned int s3c64xx_cpufreq_get_speed(unsigned int cpu)
-{
-	if (cpu != 0)
-		return 0;
-
-	return clk_get_rate(armclk) / 1000;
-}
-
 static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 				      unsigned int index)
 {
@@ -69,7 +60,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 	unsigned int old_freq, new_freq;
 	int ret;
 
-	old_freq = clk_get_rate(armclk) / 1000;
+	old_freq = clk_get_rate(policy->clk) / 1000;
 	new_freq = s3c64xx_freq_table[index].frequency;
 	dvfs = &s3c64xx_dvfs_table[s3c64xx_freq_table[index].driver_data];
 
@@ -86,7 +77,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 	}
 #endif
 
-	ret = clk_set_rate(armclk, new_freq * 1000);
+	ret = clk_set_rate(policy->clk, new_freq * 1000);
 	if (ret < 0) {
 		pr_err("Failed to set rate %dkHz: %d\n",
 		       new_freq, ret);
@@ -101,7 +92,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 		if (ret != 0) {
 			pr_err("Failed to set VDDARM for %dkHz: %d\n",
 			       new_freq, ret);
-			if (clk_set_rate(armclk, old_freq * 1000) < 0)
+			if (clk_set_rate(policy->clk, old_freq * 1000) < 0)
 				pr_err("Failed to restore original clock rate\n");
 
 			return ret;
@@ -110,7 +101,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
 #endif
 
 	pr_debug("Set actual frequency %lukHz\n",
-		 clk_get_rate(armclk) / 1000);
+		 clk_get_rate(policy->clk) / 1000);
 
 	return 0;
 }
@@ -169,11 +160,11 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
 		return -ENODEV;
 	}
 
-	armclk = clk_get(NULL, "armclk");
-	if (IS_ERR(armclk)) {
+	policy->clk = clk_get(NULL, "armclk");
+	if (IS_ERR(policy->clk)) {
 		pr_err("Unable to obtain ARMCLK: %ld\n",
-		       PTR_ERR(armclk));
-		return PTR_ERR(armclk);
+		       PTR_ERR(policy->clk));
+		return PTR_ERR(policy->clk);
 	}
 
 #ifdef CONFIG_REGULATOR
@@ -193,7 +184,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
 		unsigned long r;
 
 		/* Check for frequencies we can generate */
-		r = clk_round_rate(armclk, freq->frequency * 1000);
+		r = clk_round_rate(policy->clk, freq->frequency * 1000);
 		r /= 1000;
 		if (r != freq->frequency) {
 			pr_debug("%dkHz unsupported by clock\n",
@@ -203,7 +194,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
 
 		/* If we have no regulator then assume startup
 		 * frequency is the maximum we can support. */
-		if (!vddarm && freq->frequency > s3c64xx_cpufreq_get_speed(0))
+		if (!vddarm && freq->frequency > clk_get_rate(policy->clk) / 1000)
 			freq->frequency = CPUFREQ_ENTRY_INVALID;
 
 		freq++;
@@ -219,17 +210,17 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
 		pr_err("Failed to configure frequency table: %d\n",
 		       ret);
 		regulator_put(vddarm);
-		clk_put(armclk);
+		clk_put(policy->clk);
 	}
 
 	return ret;
 }
 
 static struct cpufreq_driver s3c64xx_cpufreq_driver = {
-	.flags          = 0,
+	.flags		= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= s3c64xx_cpufreq_set_target,
-	.get		= s3c64xx_cpufreq_get_speed,
+	.get		= cpufreq_generic_get,
 	.init		= s3c64xx_cpufreq_driver_init,
 	.name		= "s3c",
 };
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index e3973dae28a7..55a8e9fa9435 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -23,7 +23,6 @@
 #include <mach/map.h>
 #include <mach/regs-clock.h>
 
-static struct clk *cpu_clk;
 static struct clk *dmc0_clk;
 static struct clk *dmc1_clk;
 static DEFINE_MUTEX(set_freq_lock);
@@ -164,14 +163,6 @@ static void s5pv210_set_refresh(enum s5pv210_dmc_port ch, unsigned long freq)
 	__raw_writel(tmp1, reg);
 }
 
-static unsigned int s5pv210_getspeed(unsigned int cpu)
-{
-	if (cpu)
-		return 0;
-
-	return clk_get_rate(cpu_clk) / 1000;
-}
-
 static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	unsigned long reg;
@@ -193,7 +184,7 @@ static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index)
 		goto exit;
 	}
 
-	old_freq = s5pv210_getspeed(0);
+	old_freq = policy->cur;
 	new_freq = s5pv210_freq_table[index].frequency;
 
 	/* Finding current running level index */
@@ -471,9 +462,9 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy)
 	unsigned long mem_type;
 	int ret;
 
-	cpu_clk = clk_get(NULL, "armclk");
-	if (IS_ERR(cpu_clk))
-		return PTR_ERR(cpu_clk);
+	policy->clk = clk_get(NULL, "armclk");
+	if (IS_ERR(policy->clk))
+		return PTR_ERR(policy->clk);
 
 	dmc0_clk = clk_get(NULL, "sclk_dmc0");
 	if (IS_ERR(dmc0_clk)) {
@@ -516,7 +507,7 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy)
 out_dmc1:
 	clk_put(dmc0_clk);
 out_dmc0:
-	clk_put(cpu_clk);
+	clk_put(policy->clk);
 	return ret;
 }
 
@@ -560,10 +551,10 @@ static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
 }
 
 static struct cpufreq_driver s5pv210_driver = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= s5pv210_target,
-	.get		= s5pv210_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= s5pv210_cpu_init,
 	.name		= "s5pv210",
 #ifdef CONFIG_PM
diff --git a/drivers/cpufreq/sa1100-cpufreq.c b/drivers/cpufreq/sa1100-cpufreq.c
index 623da742f8e7..728eab77e8e0 100644
--- a/drivers/cpufreq/sa1100-cpufreq.c
+++ b/drivers/cpufreq/sa1100-cpufreq.c
@@ -201,7 +201,7 @@ static int __init sa1100_cpu_init(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver sa1100_driver __refdata = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= sa1100_target,
 	.get		= sa11x0_getspeed,
diff --git a/drivers/cpufreq/sa1110-cpufreq.c b/drivers/cpufreq/sa1110-cpufreq.c
index 2c2b2e601d13..546376719d8f 100644
--- a/drivers/cpufreq/sa1110-cpufreq.c
+++ b/drivers/cpufreq/sa1110-cpufreq.c
@@ -312,7 +312,7 @@ static int __init sa1110_cpu_init(struct cpufreq_policy *policy)
 /* sa1110_driver needs __refdata because it must remain after init registers
  * it with cpufreq_register_driver() */
 static struct cpufreq_driver sa1110_driver __refdata = {
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= sa1110_target,
 	.get		= sa11x0_getspeed,
diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c
index d02ccd19c9c4..5c86e3fa5593 100644
--- a/drivers/cpufreq/spear-cpufreq.c
+++ b/drivers/cpufreq/spear-cpufreq.c
@@ -30,11 +30,6 @@ static struct {
 	u32 cnt;
 } spear_cpufreq;
 
-static unsigned int spear_cpufreq_get(unsigned int cpu)
-{
-	return clk_get_rate(spear_cpufreq.clk) / 1000;
-}
-
 static struct clk *spear1340_cpu_get_possible_parent(unsigned long newfreq)
 {
 	struct clk *sys_pclk;
@@ -138,7 +133,7 @@ static int spear_cpufreq_target(struct cpufreq_policy *policy,
 	}
 
 	newfreq = clk_round_rate(srcclk, newfreq * mult);
-	if (newfreq < 0) {
+	if (newfreq <= 0) {
 		pr_err("clk_round_rate failed for cpu src clock\n");
 		return newfreq;
 	}
@@ -156,16 +151,17 @@ static int spear_cpufreq_target(struct cpufreq_policy *policy,
 
 static int spear_cpufreq_init(struct cpufreq_policy *policy)
 {
+	policy->clk = spear_cpufreq.clk;
 	return cpufreq_generic_init(policy, spear_cpufreq.freq_tbl,
 			spear_cpufreq.transition_latency);
 }
 
 static struct cpufreq_driver spear_cpufreq_driver = {
 	.name		= "cpufreq-spear",
-	.flags		= CPUFREQ_STICKY,
+	.flags		= CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= spear_cpufreq_target,
-	.get		= spear_cpufreq_get,
+	.get		= cpufreq_generic_get,
 	.init		= spear_cpufreq_init,
 	.exit		= cpufreq_generic_exit,
 	.attr		= cpufreq_generic_attr,
diff --git a/drivers/cpufreq/speedstep-smi.c b/drivers/cpufreq/speedstep-smi.c
index 0f5326d6f79f..998c17b42200 100644
--- a/drivers/cpufreq/speedstep-smi.c
+++ b/drivers/cpufreq/speedstep-smi.c
@@ -141,38 +141,6 @@ static int speedstep_smi_get_freqs(unsigned int *low, unsigned int *high)
 }
 
 /**
- * speedstep_get_state - set the SpeedStep state
- * @state: processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
- *
- */
-static int speedstep_get_state(void)
-{
-	u32 function = GET_SPEEDSTEP_STATE;
-	u32 result, state, edi, command, dummy;
-
-	command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
-
-	pr_debug("trying to determine current setting with command %x "
-		"at port %x\n", command, smi_port);
-
-	__asm__ __volatile__(
-		"push %%ebp\n"
-		"out %%al, (%%dx)\n"
-		"pop %%ebp\n"
-		: "=a" (result),
-		  "=b" (state), "=D" (edi),
-		  "=c" (dummy), "=d" (dummy), "=S" (dummy)
-		: "a" (command), "b" (function), "c" (0),
-		  "d" (smi_port), "S" (0), "D" (0)
-	);
-
-	pr_debug("state is %x, result is %x\n", state, result);
-
-	return state & 1;
-}
-
-
-/**
  * speedstep_set_state - set the SpeedStep state
  * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
  *
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index b7309c37033d..e652c1bd8d0f 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -47,21 +47,9 @@ static struct clk *pll_x_clk;
 static struct clk *pll_p_clk;
 static struct clk *emc_clk;
 
-static unsigned long target_cpu_speed[NUM_CPUS];
 static DEFINE_MUTEX(tegra_cpu_lock);
 static bool is_suspended;
 
-static unsigned int tegra_getspeed(unsigned int cpu)
-{
-	unsigned long rate;
-
-	if (cpu >= NUM_CPUS)
-		return 0;
-
-	rate = clk_get_rate(cpu_clk) / 1000;
-	return rate;
-}
-
 static int tegra_cpu_clk_set_rate(unsigned long rate)
 {
 	int ret;
@@ -103,9 +91,6 @@ static int tegra_update_cpu_speed(struct cpufreq_policy *policy,
 {
 	int ret = 0;
 
-	if (tegra_getspeed(0) == rate)
-		return ret;
-
 	/*
 	 * Vote on memory bus frequency based on cpu frequency
 	 * This sets the minimum frequency, display or avp may request higher
@@ -125,33 +110,16 @@ static int tegra_update_cpu_speed(struct cpufreq_policy *policy,
 	return ret;
 }
 
-static unsigned long tegra_cpu_highest_speed(void)
-{
-	unsigned long rate = 0;
-	int i;
-
-	for_each_online_cpu(i)
-		rate = max(rate, target_cpu_speed[i]);
-	return rate;
-}
-
 static int tegra_target(struct cpufreq_policy *policy, unsigned int index)
 {
-	unsigned int freq;
-	int ret = 0;
+	int ret = -EBUSY;
 
 	mutex_lock(&tegra_cpu_lock);
 
-	if (is_suspended)
-		goto out;
-
-	freq = freq_table[index].frequency;
+	if (!is_suspended)
+		ret = tegra_update_cpu_speed(policy,
+				freq_table[index].frequency);
 
-	target_cpu_speed[policy->cpu] = freq;
-
-	ret = tegra_update_cpu_speed(policy, tegra_cpu_highest_speed());
-
-out:
 	mutex_unlock(&tegra_cpu_lock);
 	return ret;
 }
@@ -165,7 +133,8 @@ static int tegra_pm_notify(struct notifier_block *nb, unsigned long event,
 		is_suspended = true;
 		pr_info("Tegra cpufreq suspend: setting frequency to %d kHz\n",
 			freq_table[0].frequency);
-		tegra_update_cpu_speed(policy, freq_table[0].frequency);
+		if (clk_get_rate(cpu_clk) / 1000 != freq_table[0].frequency)
+			tegra_update_cpu_speed(policy, freq_table[0].frequency);
 		cpufreq_cpu_put(policy);
 	} else if (event == PM_POST_SUSPEND) {
 		is_suspended = false;
@@ -189,8 +158,6 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
 	clk_prepare_enable(emc_clk);
 	clk_prepare_enable(cpu_clk);
 
-	target_cpu_speed[policy->cpu] = tegra_getspeed(policy->cpu);
-
 	/* FIXME: what's the actual transition time? */
 	ret = cpufreq_generic_init(policy, freq_table, 300 * 1000);
 	if (ret) {
@@ -202,6 +169,7 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
 	if (policy->cpu == 0)
 		register_pm_notifier(&tegra_cpu_pm_notifier);
 
+	policy->clk = cpu_clk;
 	return 0;
 }
 
@@ -214,9 +182,10 @@ static int tegra_cpu_exit(struct cpufreq_policy *policy)
 }
 
 static struct cpufreq_driver tegra_cpufreq_driver = {
+	.flags		= CPUFREQ_NEED_INITIAL_FREQ_CHECK,
 	.verify		= cpufreq_generic_frequency_table_verify,
 	.target_index	= tegra_target,
-	.get		= tegra_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= tegra_cpu_init,
 	.exit		= tegra_cpu_exit,
 	.name		= "tegra",
diff --git a/drivers/cpufreq/unicore2-cpufreq.c b/drivers/cpufreq/unicore2-cpufreq.c
index 653ae2955b55..36cc330b8747 100644
--- a/drivers/cpufreq/unicore2-cpufreq.c
+++ b/drivers/cpufreq/unicore2-cpufreq.c
@@ -11,6 +11,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/init.h>
@@ -33,42 +34,34 @@ static int ucv2_verify_speed(struct cpufreq_policy *policy)
 	return 0;
 }
 
-static unsigned int ucv2_getspeed(unsigned int cpu)
-{
-	struct clk *mclk = clk_get(NULL, "MAIN_CLK");
-
-	if (cpu)
-		return 0;
-	return clk_get_rate(mclk)/1000;
-}
-
 static int ucv2_target(struct cpufreq_policy *policy,
 			 unsigned int target_freq,
 			 unsigned int relation)
 {
-	unsigned int cur = ucv2_getspeed(0);
 	struct cpufreq_freqs freqs;
-	struct clk *mclk = clk_get(NULL, "MAIN_CLK");
+	int ret;
 
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+	freqs.old = policy->cur;
+	freqs.new = target_freq;
 
-	if (!clk_set_rate(mclk, target_freq * 1000)) {
-		freqs.old = cur;
-		freqs.new = target_freq;
-	}
-
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+	ret = clk_set_rate(policy->mclk, target_freq * 1000);
+	cpufreq_notify_post_transition(policy, &freqs, ret);
 
-	return 0;
+	return ret;
 }
 
 static int __init ucv2_cpu_init(struct cpufreq_policy *policy)
 {
 	if (policy->cpu != 0)
 		return -EINVAL;
+
 	policy->min = policy->cpuinfo.min_freq = 250000;
 	policy->max = policy->cpuinfo.max_freq = 1000000;
 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
+	policy->clk = clk_get(NULL, "MAIN_CLK");
+	if (IS_ERR(policy->clk))
+		return PTR_ERR(policy->clk);
 	return 0;
 }
 
@@ -76,7 +69,7 @@ static struct cpufreq_driver ucv2_driver = {
 	.flags		= CPUFREQ_STICKY,
 	.verify		= ucv2_verify_speed,
 	.target		= ucv2_target,
-	.get		= ucv2_getspeed,
+	.get		= cpufreq_generic_get,
 	.init		= ucv2_cpu_init,
 	.name		= "UniCore-II",
 };