diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index c9311be29a64..c29c2c3ec0ad 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -261,7 +261,7 @@ static int acpi_processor_get_info(struct acpi_device *device)
 
 	apic_id = acpi_get_apicid(pr->handle, device_declaration, pr->acpi_id);
 	if (apic_id < 0) {
-		acpi_handle_err(pr->handle, "failed to get CPU APIC ID.\n");
+		acpi_handle_debug(pr->handle, "failed to get CPU APIC ID.\n");
 		return -ENODEV;
 	}
 	pr->apic_id = apic_id;
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 24db8e153bf0..4ed1aa384df2 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -108,7 +108,7 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_use_default_register_widths, TRUE);
 /*
  * Optionally enable output from the AML Debug Object.
  */
-bool ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
+u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
 
 /*
  * Optionally copy the entire DSDT to local memory (instead of simply
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 384da5ab5955..fcb59c21c68d 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -33,6 +33,7 @@
 #include <linux/proc_fs.h>
 #include <linux/acpi.h>
 #include <linux/slab.h>
+#include <linux/regulator/machine.h>
 #ifdef CONFIG_X86
 #include <asm/mpspec.h>
 #endif
@@ -509,6 +510,14 @@ void __init acpi_early_init(void)
 		goto error0;
 	}
 
+	/*
+	 * If the system is using ACPI then we can be reasonably
+	 * confident that any regulators are managed by the firmware
+	 * so tell the regulator core it has everything it needs to
+	 * know.
+	 */
+	regulator_has_full_constraints();
+
 	return;
 
       error0:
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index d49f1e464703..c14a00d3dca6 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -726,18 +726,6 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 }
 #endif /* CONFIG_PM_SLEEP */
 
-/**
- * acpi_dev_pm_get_node - Get ACPI device node for the given physical device.
- * @dev: Device to get the ACPI node for.
- */
-struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
-{
-	acpi_handle handle = ACPI_HANDLE(dev);
-	struct acpi_device *adev;
-
-	return handle && !acpi_bus_get_device(handle, &adev) ? adev : NULL;
-}
-
 /**
  * acpi_dev_pm_low_power - Put ACPI device into a low-power state.
  * @dev: Device to put into a low-power state.
@@ -778,7 +766,7 @@ static int acpi_dev_pm_full_power(struct acpi_device *adev)
  */
 int acpi_dev_runtime_suspend(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	bool remote_wakeup;
 	int error;
 
@@ -809,7 +797,7 @@ EXPORT_SYMBOL_GPL(acpi_dev_runtime_suspend);
  */
 int acpi_dev_runtime_resume(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	int error;
 
 	if (!adev)
@@ -862,7 +850,7 @@ EXPORT_SYMBOL_GPL(acpi_subsys_runtime_resume);
  */
 int acpi_dev_suspend_late(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	u32 target_state;
 	bool wakeup;
 	int error;
@@ -894,7 +882,7 @@ EXPORT_SYMBOL_GPL(acpi_dev_suspend_late);
  */
 int acpi_dev_resume_early(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	int error;
 
 	if (!adev)
@@ -985,7 +973,7 @@ static struct dev_pm_domain acpi_general_pm_domain = {
  */
 int acpi_dev_pm_attach(struct device *dev, bool power_on)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 
 	if (!adev)
 		return -ENODEV;
@@ -1017,7 +1005,7 @@ EXPORT_SYMBOL_GPL(acpi_dev_pm_attach);
  */
 void acpi_dev_pm_detach(struct device *dev, bool power_off)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 
 	if (adev && dev->pm_domain == &acpi_general_pm_domain) {
 		dev->pm_domain = NULL;
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 34e7b3c6a08d..a4eea9a508d3 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -44,13 +44,13 @@ static int map_lapic_id(struct acpi_subtable_header *entry,
 		(struct acpi_madt_local_apic *)entry;
 
 	if (!(lapic->lapic_flags & ACPI_MADT_ENABLED))
-		return 0;
+		return -ENODEV;
 
 	if (lapic->processor_id != acpi_id)
-		return 0;
+		return -EINVAL;
 
 	*apic_id = lapic->id;
-	return 1;
+	return 0;
 }
 
 static int map_x2apic_id(struct acpi_subtable_header *entry,
@@ -60,14 +60,14 @@ static int map_x2apic_id(struct acpi_subtable_header *entry,
 		(struct acpi_madt_local_x2apic *)entry;
 
 	if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
-		return 0;
+		return -ENODEV;
 
 	if (device_declaration && (apic->uid == acpi_id)) {
 		*apic_id = apic->local_apic_id;
-		return 1;
+		return 0;
 	}
 
-	return 0;
+	return -EINVAL;
 }
 
 static int map_lsapic_id(struct acpi_subtable_header *entry,
@@ -77,16 +77,16 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
 		(struct acpi_madt_local_sapic *)entry;
 
 	if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
-		return 0;
+		return -ENODEV;
 
 	if (device_declaration) {
 		if ((entry->length < 16) || (lsapic->uid != acpi_id))
-			return 0;
+			return -EINVAL;
 	} else if (lsapic->processor_id != acpi_id)
-		return 0;
+		return -EINVAL;
 
 	*apic_id = (lsapic->id << 8) | lsapic->eid;
-	return 1;
+	return 0;
 }
 
 static int map_madt_entry(int type, u32 acpi_id)
@@ -116,13 +116,13 @@ static int map_madt_entry(int type, u32 acpi_id)
 		struct acpi_subtable_header *header =
 			(struct acpi_subtable_header *)entry;
 		if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
-			if (map_lapic_id(header, acpi_id, &apic_id))
+			if (!map_lapic_id(header, acpi_id, &apic_id))
 				break;
 		} else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
-			if (map_x2apic_id(header, type, acpi_id, &apic_id))
+			if (!map_x2apic_id(header, type, acpi_id, &apic_id))
 				break;
 		} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
-			if (map_lsapic_id(header, type, acpi_id, &apic_id))
+			if (!map_lsapic_id(header, type, acpi_id, &apic_id))
 				break;
 		}
 		entry += header->length;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index e00365ccb897..7384158c7f87 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2105,6 +2105,7 @@ void acpi_bus_trim(struct acpi_device *adev)
 	list_for_each_entry_reverse(child, &adev->children, node)
 		acpi_bus_trim(child);
 
+	adev->flags.match_driver = false;
 	if (handler) {
 		if (handler->detach)
 			handler->detach(adev);
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 443dc9366052..91a32cefb11f 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -226,7 +226,7 @@ module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
 /* /sys/modules/acpi/parameters/aml_debug_output */
 
 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
-		   bool, 0644);
+		   byte, 0644);
 MODULE_PARM_DESC(aml_debug_output,
 		 "To enable/disable the ACPI Debug Object output.");
 
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 79e5608e71b5..18448a7e9f86 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -919,7 +919,7 @@ static void __init acpi_cpufreq_boost_init(void)
 	}
 }
 
-static void __exit acpi_cpufreq_boost_exit(void)
+static void acpi_cpufreq_boost_exit(void)
 {
 	if (msrs) {
 		unregister_cpu_notifier(&boost_nb);
@@ -969,9 +969,10 @@ static int __init acpi_cpufreq_init(void)
 	acpi_cpufreq_boost_init();
 
 	ret = cpufreq_register_driver(&acpi_cpufreq_driver);
-	if (ret)
+	if (ret) {
 		free_acpi_perf_data();
-
+		acpi_cpufreq_boost_exit();
+	}
 	return ret;
 }
 
diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index 31f3adba4cf3..7d2f43550700 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -67,7 +67,7 @@ comment "DEVFREQ Drivers"
 
 config ARM_EXYNOS4_BUS_DEVFREQ
 	bool "ARM Exynos4210/4212/4412 Memory Bus DEVFREQ Driver"
-	depends on CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412
+	depends on (CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM
 	select ARCH_HAS_OPP
 	select DEVFREQ_GOV_SIMPLE_ONDEMAND
 	help
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index d2f16f14b419..fea6773f87fc 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -77,7 +77,7 @@ extern u8 acpi_gbl_create_osi_method;
 extern u8 acpi_gbl_disable_auto_repair;
 extern u8 acpi_gbl_disable_ssdt_table_load;
 extern u8 acpi_gbl_do_not_use_xsdt;
-extern bool acpi_gbl_enable_aml_debug_object;
+extern u8 acpi_gbl_enable_aml_debug_object;
 extern u8 acpi_gbl_enable_interpreter_slack;
 extern u32 acpi_gbl_trace_flags;
 extern acpi_name acpi_gbl_trace_method_name;