Merge branch 'acpi-dev-pm' into acpi-enumeration

Subsequent commits in this branch will depend on 'acpi-dev-pm'
material.

11 files changed, 1061 insertions, 320 deletions

diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 7198b6d..2a4502b 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -21,9 +21,10 @@ obj-y				+= acpi.o \
 acpi-y				+= osl.o utils.o reboot.o
 acpi-y				+= nvs.o
 
-# sleep related files
+# Power management related files
 acpi-y				+= wakeup.o
 acpi-y				+= sleep.o
+acpi-$(CONFIG_PM)		+= device_pm.o
 acpi-$(CONFIG_ACPI_SLEEP)	+= proc.o
 
 
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index d59175e..1f0d457 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -257,7 +257,15 @@ static int __acpi_bus_get_power(struct acpi_device *device, int *state)
 }
 
 
-static int __acpi_bus_set_power(struct acpi_device *device, int state)
+/**
+ * acpi_device_set_power - Set power state of an ACPI device.
+ * @device: Device to set the power state of.
+ * @state: New power state to set.
+ *
+ * Callers must ensure that the device is power manageable before using this
+ * function.
+ */
+int acpi_device_set_power(struct acpi_device *device, int state)
 {
 	int result = 0;
 	acpi_status status = AE_OK;
@@ -298,6 +306,12 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
 	 * a lower-powered state.
 	 */
 	if (state < device->power.state) {
+		if (device->power.state >= ACPI_STATE_D3_HOT &&
+		    state != ACPI_STATE_D0) {
+			printk(KERN_WARNING PREFIX
+			      "Cannot transition to non-D0 state from D3\n");
+			return -ENODEV;
+		}
 		if (device->power.flags.power_resources) {
 			result = acpi_power_transition(device, state);
 			if (result)
@@ -341,6 +355,7 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
 
 	return result;
 }
+EXPORT_SYMBOL(acpi_device_set_power);
 
 
 int acpi_bus_set_power(acpi_handle handle, int state)
@@ -359,7 +374,7 @@ int acpi_bus_set_power(acpi_handle handle, int state)
 		return -ENODEV;
 	}
 
-	return __acpi_bus_set_power(device, state);
+	return acpi_device_set_power(device, state);
 }
 EXPORT_SYMBOL(acpi_bus_set_power);
 
@@ -402,7 +417,7 @@ int acpi_bus_update_power(acpi_handle handle, int *state_p)
 	if (result)
 		return result;
 
-	result = __acpi_bus_set_power(device, state);
+	result = acpi_device_set_power(device, state);
 	if (!result && state_p)
 		*state_p = state;
 
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
new file mode 100644
index 0000000..f09dc98
--- /dev/null
+++ b/drivers/acpi/device_pm.c
@@ -0,0 +1,668 @@
+/*
+ * drivers/acpi/device_pm.c - ACPI device power management routines.
+ *
+ * Copyright (C) 2012, Intel Corp.
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/mutex.h>
+#include <linux/pm_qos.h>
+#include <linux/pm_runtime.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+
+static DEFINE_MUTEX(acpi_pm_notifier_lock);
+
+/**
+ * acpi_add_pm_notifier - Register PM notifier for given ACPI device.
+ * @adev: ACPI device to add the notifier for.
+ * @context: Context information to pass to the notifier routine.
+ *
+ * NOTE: @adev need not be a run-wake or wakeup device to be a valid source of
+ * PM wakeup events.  For example, wakeup events may be generated for bridges
+ * if one of the devices below the bridge is signaling wakeup, even if the
+ * bridge itself doesn't have a wakeup GPE associated with it.
+ */
+acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
+				 acpi_notify_handler handler, void *context)
+{
+	acpi_status status = AE_ALREADY_EXISTS;
+
+	mutex_lock(&acpi_pm_notifier_lock);
+
+	if (adev->wakeup.flags.notifier_present)
+		goto out;
+
+	status = acpi_install_notify_handler(adev->handle,
+					     ACPI_SYSTEM_NOTIFY,
+					     handler, context);
+	if (ACPI_FAILURE(status))
+		goto out;
+
+	adev->wakeup.flags.notifier_present = true;
+
+ out:
+	mutex_unlock(&acpi_pm_notifier_lock);
+	return status;
+}
+
+/**
+ * acpi_remove_pm_notifier - Unregister PM notifier from given ACPI device.
+ * @adev: ACPI device to remove the notifier from.
+ */
+acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
+				    acpi_notify_handler handler)
+{
+	acpi_status status = AE_BAD_PARAMETER;
+
+	mutex_lock(&acpi_pm_notifier_lock);
+
+	if (!adev->wakeup.flags.notifier_present)
+		goto out;
+
+	status = acpi_remove_notify_handler(adev->handle,
+					    ACPI_SYSTEM_NOTIFY,
+					    handler);
+	if (ACPI_FAILURE(status))
+		goto out;
+
+	adev->wakeup.flags.notifier_present = false;
+
+ out:
+	mutex_unlock(&acpi_pm_notifier_lock);
+	return status;
+}
+
+/**
+ * acpi_device_power_state - Get preferred power state of ACPI device.
+ * @dev: Device whose preferred target power state to return.
+ * @adev: ACPI device node corresponding to @dev.
+ * @target_state: System state to match the resultant device state.
+ * @d_max_in: Deepest low-power state to take into consideration.
+ * @d_min_p: Location to store the upper limit of the allowed states range.
+ * Return value: Preferred power state of the device on success, -ENODEV
+ * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure
+ *
+ * Find the lowest power (highest number) ACPI device power state that the
+ * device can be in while the system is in the state represented by
+ * @target_state.  If @d_min_p is set, the highest power (lowest number) device
+ * power state that @dev can be in for the given system sleep state is stored
+ * at the location pointed to by it.
+ *
+ * Callers must ensure that @dev and @adev are valid pointers and that @adev
+ * actually corresponds to @dev before using this function.
+ */
+int acpi_device_power_state(struct device *dev, struct acpi_device *adev,
+			    u32 target_state, int d_max_in, int *d_min_p)
+{
+	char acpi_method[] = "_SxD";
+	unsigned long long d_min, d_max;
+	bool wakeup = false;
+
+	if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3)
+		return -EINVAL;
+
+	if (d_max_in > ACPI_STATE_D3_HOT) {
+		enum pm_qos_flags_status stat;
+
+		stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF);
+		if (stat == PM_QOS_FLAGS_ALL)
+			d_max_in = ACPI_STATE_D3_HOT;
+	}
+
+	acpi_method[2] = '0' + target_state;
+	/*
+	 * If the sleep state is S0, the lowest limit from ACPI is D3,
+	 * but if the device has _S0W, we will use the value from _S0W
+	 * as the lowest limit from ACPI.  Finally, we will constrain
+	 * the lowest limit with the specified one.
+	 */
+	d_min = ACPI_STATE_D0;
+	d_max = ACPI_STATE_D3;
+
+	/*
+	 * If present, _SxD methods return the minimum D-state (highest power
+	 * state) we can use for the corresponding S-states.  Otherwise, the
+	 * minimum D-state is D0 (ACPI 3.x).
+	 *
+	 * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
+	 * provided -- that's our fault recovery, we ignore retval.
+	 */
+	if (target_state > ACPI_STATE_S0) {
+		acpi_evaluate_integer(adev->handle, acpi_method, NULL, &d_min);
+		wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid
+			&& adev->wakeup.sleep_state >= target_state;
+	} else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) !=
+			PM_QOS_FLAGS_NONE) {
+		wakeup = adev->wakeup.flags.valid;
+	}
+
+	/*
+	 * If _PRW says we can wake up the system from the target sleep state,
+	 * the D-state returned by _SxD is sufficient for that (we assume a
+	 * wakeup-aware driver if wake is set).  Still, if _SxW exists
+	 * (ACPI 3.x), it should return the maximum (lowest power) D-state that
+	 * can wake the system.  _S0W may be valid, too.
+	 */
+	if (wakeup) {
+		acpi_status status;
+
+		acpi_method[3] = 'W';
+		status = acpi_evaluate_integer(adev->handle, acpi_method, NULL,
+						&d_max);
+		if (ACPI_FAILURE(status)) {
+			if (target_state != ACPI_STATE_S0 ||
+			    status != AE_NOT_FOUND)
+				d_max = d_min;
+		} else if (d_max < d_min) {
+			/* Warn the user of the broken DSDT */
+			printk(KERN_WARNING "ACPI: Wrong value from %s\n",
+				acpi_method);
+			/* Sanitize it */
+			d_min = d_max;
+		}
+	}
+
+	if (d_max_in < d_min)
+		return -EINVAL;
+	if (d_min_p)
+		*d_min_p = d_min;
+	/* constrain d_max with specified lowest limit (max number) */
+	if (d_max > d_max_in) {
+		for (d_max = d_max_in; d_max > d_min; d_max--) {
+			if (adev->power.states[d_max].flags.valid)
+				break;
+		}
+	}
+	return d_max;
+}
+EXPORT_SYMBOL_GPL(acpi_device_power_state);
+
+/**
+ * acpi_pm_device_sleep_state - Get preferred power state of ACPI device.
+ * @dev: Device whose preferred target power state to return.
+ * @d_min_p: Location to store the upper limit of the allowed states range.
+ * @d_max_in: Deepest low-power state to take into consideration.
+ * Return value: Preferred power state of the device on success, -ENODEV
+ * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure
+ *
+ * The caller must ensure that @dev is valid before using this function.
+ */
+int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
+{
+	acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
+	struct acpi_device *adev;
+
+	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
+		dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
+		return -ENODEV;
+	}
+
+	return acpi_device_power_state(dev, adev, acpi_target_system_state(),
+				       d_max_in, d_min_p);
+}
+EXPORT_SYMBOL(acpi_pm_device_sleep_state);
+
+#ifdef CONFIG_PM_RUNTIME
+/**
+ * acpi_wakeup_device - Wakeup notification handler for ACPI devices.
+ * @handle: ACPI handle of the device the notification is for.
+ * @event: Type of the signaled event.
+ * @context: Device corresponding to @handle.
+ */
+static void acpi_wakeup_device(acpi_handle handle, u32 event, void *context)
+{
+	struct device *dev = context;
+
+	if (event == ACPI_NOTIFY_DEVICE_WAKE && dev) {
+		pm_wakeup_event(dev, 0);
+		pm_runtime_resume(dev);
+	}
+}
+
+/**
+ * __acpi_device_run_wake - Enable/disable runtime remote wakeup for device.
+ * @adev: ACPI device to enable/disable the remote wakeup for.
+ * @enable: Whether to enable or disable the wakeup functionality.
+ *
+ * Enable/disable the GPE associated with @adev so that it can generate
+ * wakeup signals for the device in response to external (remote) events and
+ * enable/disable device wakeup power.
+ *
+ * Callers must ensure that @adev is a valid ACPI device node before executing
+ * this function.
+ */
+int __acpi_device_run_wake(struct acpi_device *adev, bool enable)
+{
+	struct acpi_device_wakeup *wakeup = &adev->wakeup;
+
+	if (enable) {
+		acpi_status res;
+		int error;
+
+		error = acpi_enable_wakeup_device_power(adev, ACPI_STATE_S0);
+		if (error)
+			return error;
+
+		res = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number);
+		if (ACPI_FAILURE(res)) {
+			acpi_disable_wakeup_device_power(adev);
+			return -EIO;
+		}
+	} else {
+		acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number);
+		acpi_disable_wakeup_device_power(adev);
+	}
+	return 0;
+}
+
+/**
+ * acpi_pm_device_run_wake - Enable/disable remote wakeup for given device.
+ * @dev: Device to enable/disable the platform to wake up.
+ * @enable: Whether to enable or disable the wakeup functionality.
+ */
+int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
+{
+	struct acpi_device *adev;
+	acpi_handle handle;
+
+	if (!device_run_wake(phys_dev))
+		return -EINVAL;
+
+	handle = DEVICE_ACPI_HANDLE(phys_dev);
+	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
+		dev_dbg(phys_dev, "ACPI handle without context in %s!\n",
+			__func__);
+		return -ENODEV;
+	}
+
+	return __acpi_device_run_wake(adev, enable);
+}
+EXPORT_SYMBOL(acpi_pm_device_run_wake);
+#else
+static inline void acpi_wakeup_device(acpi_handle handle, u32 event,
+				      void *context) {}
+#endif /* CONFIG_PM_RUNTIME */
+
+ #ifdef CONFIG_PM_SLEEP
+/**
+ * __acpi_device_sleep_wake - Enable or disable device to wake up the system.
+ * @dev: Device to enable/desible to wake up the system.
+ * @target_state: System state the device is supposed to wake up from.
+ * @enable: Whether to enable or disable @dev to wake up the system.
+ */
+int __acpi_device_sleep_wake(struct acpi_device *adev, u32 target_state,
+			     bool enable)
+{
+	return enable ?
+		acpi_enable_wakeup_device_power(adev, target_state) :
+		acpi_disable_wakeup_device_power(adev);
+}
+
+/**
+ * acpi_pm_device_sleep_wake - Enable or disable device to wake up the system.
+ * @dev: Device to enable/desible to wake up the system from sleep states.
+ * @enable: Whether to enable or disable @dev to wake up the system.
+ */
+int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
+{
+	acpi_handle handle;
+	struct acpi_device *adev;
+	int error;
+
+	if (!device_can_wakeup(dev))
+		return -EINVAL;
+
+	handle = DEVICE_ACPI_HANDLE(dev);
+	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
+		dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
+		return -ENODEV;
+	}
+
+	error = __acpi_device_sleep_wake(adev, acpi_target_system_state(),
+					 enable);
+	if (!error)
+		dev_info(dev, "System wakeup %s by ACPI\n",
+				enable ? "enabled" : "disabled");
+
+	return error;
+}
+#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.
+ */
+static struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
+{
+	acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
+	struct acpi_device *adev;
+
+	return handle && ACPI_SUCCESS(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.
+ * @adev: ACPI device node corresponding to @dev.
+ * @system_state: System state to choose the device state for.
+ */
+static int acpi_dev_pm_low_power(struct device *dev, struct acpi_device *adev,
+				 u32 system_state)
+{
+	int power_state;
+
+	if (!acpi_device_power_manageable(adev))
+		return 0;
+
+	power_state = acpi_device_power_state(dev, adev, system_state,
+					      ACPI_STATE_D3, NULL);
+	if (power_state < ACPI_STATE_D0 || power_state > ACPI_STATE_D3)
+		return -EIO;
+
+	return acpi_device_set_power(adev, power_state);
+}
+
+/**
+ * acpi_dev_pm_full_power - Put ACPI device into the full-power state.
+ * @adev: ACPI device node to put into the full-power state.
+ */
+static int acpi_dev_pm_full_power(struct acpi_device *adev)
+{
+	return acpi_device_power_manageable(adev) ?
+		acpi_device_set_power(adev, ACPI_STATE_D0) : 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+/**
+ * acpi_dev_runtime_suspend - Put device into a low-power state using ACPI.
+ * @dev: Device to put into a low-power state.
+ *
+ * Put the given device into a runtime low-power state using the standard ACPI
+ * mechanism.  Set up remote wakeup if desired, choose the state to put the
+ * device into (this checks if remote wakeup is expected to work too), and set
+ * the power state of the device.
+ */
+int acpi_dev_runtime_suspend(struct device *dev)
+{
+	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	bool remote_wakeup;
+	int error;
+
+	if (!adev)
+		return 0;
+
+	remote_wakeup = dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) >
+				PM_QOS_FLAGS_NONE;
+	error = __acpi_device_run_wake(adev, remote_wakeup);
+	if (remote_wakeup && error)
+		return -EAGAIN;
+
+	error = acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0);
+	if (error)
+		__acpi_device_run_wake(adev, false);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_runtime_suspend);
+
+/**
+ * acpi_dev_runtime_resume - Put device into the full-power state using ACPI.
+ * @dev: Device to put into the full-power state.
+ *
+ * Put the given device into the full-power state using the standard ACPI
+ * mechanism at run time.  Set the power state of the device to ACPI D0 and
+ * disable remote wakeup.
+ */
+int acpi_dev_runtime_resume(struct device *dev)
+{
+	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	int error;
+
+	if (!adev)
+		return 0;
+
+	error = acpi_dev_pm_full_power(adev);
+	__acpi_device_run_wake(adev, false);
+	return error;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_runtime_resume);
+
+/**
+ * acpi_subsys_runtime_suspend - Suspend device using ACPI.
+ * @dev: Device to suspend.
+ *
+ * Carry out the generic runtime suspend procedure for @dev and use ACPI to put
+ * it into a runtime low-power state.
+ */
+int acpi_subsys_runtime_suspend(struct device *dev)
+{
+	int ret = pm_generic_runtime_suspend(dev);
+	return ret ? ret : acpi_dev_runtime_suspend(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_runtime_suspend);
+
+/**
+ * acpi_subsys_runtime_resume - Resume device using ACPI.
+ * @dev: Device to Resume.
+ *
+ * Use ACPI to put the given device into the full-power state and carry out the
+ * generic runtime resume procedure for it.
+ */
+int acpi_subsys_runtime_resume(struct device *dev)
+{
+	int ret = acpi_dev_runtime_resume(dev);
+	return ret ? ret : pm_generic_runtime_resume(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_runtime_resume);
+#endif /* CONFIG_PM_RUNTIME */
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * acpi_dev_suspend_late - Put device into a low-power state using ACPI.
+ * @dev: Device to put into a low-power state.
+ *
+ * Put the given device into a low-power state during system transition to a
+ * sleep state using the standard ACPI mechanism.  Set up system wakeup if
+ * desired, choose the state to put the device into (this checks if system
+ * wakeup is expected to work too), and set the power state of the device.
+ */
+int acpi_dev_suspend_late(struct device *dev)
+{
+	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	u32 target_state;
+	bool wakeup;
+	int error;
+
+	if (!adev)
+		return 0;
+
+	target_state = acpi_target_system_state();
+	wakeup = device_may_wakeup(dev);
+	error = __acpi_device_sleep_wake(adev, target_state, wakeup);
+	if (wakeup && error)
+		return error;
+
+	error = acpi_dev_pm_low_power(dev, adev, target_state);
+	if (error)
+		__acpi_device_sleep_wake(adev, ACPI_STATE_UNKNOWN, false);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_suspend_late);
+
+/**
+ * acpi_dev_resume_early - Put device into the full-power state using ACPI.
+ * @dev: Device to put into the full-power state.
+ *
+ * Put the given device into the full-power state using the standard ACPI
+ * mechanism during system transition to the working state.  Set the power
+ * state of the device to ACPI D0 and disable remote wakeup.
+ */
+int acpi_dev_resume_early(struct device *dev)
+{
+	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	int error;
+
+	if (!adev)
+		return 0;
+
+	error = acpi_dev_pm_full_power(adev);
+	__acpi_device_sleep_wake(adev, ACPI_STATE_UNKNOWN, false);
+	return error;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_resume_early);
+
+/**
+ * acpi_subsys_prepare - Prepare device for system transition to a sleep state.
+ * @dev: Device to prepare.
+ */
+int acpi_subsys_prepare(struct device *dev)
+{
+	/*
+	 * Follow PCI and resume devices suspended at run time before running
+	 * their system suspend callbacks.
+	 */
+	pm_runtime_resume(dev);
+	return pm_generic_prepare(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_prepare);
+
+/**
+ * acpi_subsys_suspend_late - Suspend device using ACPI.
+ * @dev: Device to suspend.
+ *
+ * Carry out the generic late suspend procedure for @dev and use ACPI to put
+ * it into a low-power state during system transition into a sleep state.
+ */
+int acpi_subsys_suspend_late(struct device *dev)
+{
+	int ret = pm_generic_suspend_late(dev);
+	return ret ? ret : acpi_dev_suspend_late(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_suspend_late);
+
+/**
+ * acpi_subsys_resume_early - Resume device using ACPI.
+ * @dev: Device to Resume.
+ *
+ * Use ACPI to put the given device into the full-power state and carry out the
+ * generic early resume procedure for it during system transition into the
+ * working state.
+ */
+int acpi_subsys_resume_early(struct device *dev)
+{
+	int ret = acpi_dev_resume_early(dev);
+	return ret ? ret : pm_generic_resume_early(dev);
+}
+EXPORT_SYMBOL_GPL(acpi_subsys_resume_early);
+#endif /* CONFIG_PM_SLEEP */
+
+static struct dev_pm_domain acpi_general_pm_domain = {
+	.ops = {
+#ifdef CONFIG_PM_RUNTIME
+		.runtime_suspend = acpi_subsys_runtime_suspend,
+		.runtime_resume = acpi_subsys_runtime_resume,
+		.runtime_idle = pm_generic_runtime_idle,
+#endif
+#ifdef CONFIG_PM_SLEEP
+		.prepare = acpi_subsys_prepare,
+		.suspend_late = acpi_subsys_suspend_late,
+		.resume_early = acpi_subsys_resume_early,
+		.poweroff_late = acpi_subsys_suspend_late,
+		.restore_early = acpi_subsys_resume_early,
+#endif
+	},
+};
+
+/**
+ * acpi_dev_pm_attach - Prepare device for ACPI power management.
+ * @dev: Device to prepare.
+ * @power_on: Whether or not to power on the device.
+ *
+ * If @dev has a valid ACPI handle that has a valid struct acpi_device object
+ * attached to it, install a wakeup notification handler for the device and
+ * add it to the general ACPI PM domain.  If @power_on is set, the device will
+ * be put into the ACPI D0 state before the function returns.
+ *
+ * This assumes that the @dev's bus type uses generic power management callbacks
+ * (or doesn't use any power management callbacks at all).
+ *
+ * Callers must ensure proper synchronization of this function with power
+ * management callbacks.
+ */
+int acpi_dev_pm_attach(struct device *dev, bool power_on)
+{
+	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+
+	if (!adev)
+		return -ENODEV;
+
+	if (dev->pm_domain)
+		return -EEXIST;
+
+	acpi_add_pm_notifier(adev, acpi_wakeup_device, dev);
+	dev->pm_domain = &acpi_general_pm_domain;
+	if (power_on) {
+		acpi_dev_pm_full_power(adev);
+		__acpi_device_run_wake(adev, false);
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_pm_attach);
+
+/**
+ * acpi_dev_pm_detach - Remove ACPI power management from the device.
+ * @dev: Device to take care of.
+ * @power_off: Whether or not to try to remove power from the device.
+ *
+ * Remove the device from the general ACPI PM domain and remove its wakeup
+ * notifier.  If @power_off is set, additionally remove power from the device if
+ * possible.
+ *
+ * Callers must ensure proper synchronization of this function with power
+ * management callbacks.
+ */
+void acpi_dev_pm_detach(struct device *dev, bool power_off)
+{
+	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+
+	if (adev && dev->pm_domain == &acpi_general_pm_domain) {
+		dev->pm_domain = NULL;
+		acpi_remove_pm_notifier(adev, acpi_wakeup_device);
+		if (power_off) {
+			/*
+			 * If the device's PM QoS resume latency limit or flags
+			 * have been exposed to user space, they have to be
+			 * hidden at this point, so that they don't affect the
+			 * choice of the low-power state to put the device into.
+			 */
+			dev_pm_qos_hide_latency_limit(dev);
+			dev_pm_qos_hide_flags(dev);
+			__acpi_device_run_wake(adev, false);
+			acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0);
+		}
+	}
+}
+EXPORT_SYMBOL_GPL(acpi_dev_pm_detach);
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 671bbe6..d59a607 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1006,8 +1006,10 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
 		 * D3hot is only valid if _PR3 present.
 		 */
 		if (ps->resources.count ||
-		    (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT))
+		    (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) {
 			ps->flags.valid = 1;
+			ps->flags.os_accessible = 1;
+		}
 
 		ps->power = -1;	/* Unknown - driver assigned */
 		ps->latency = -1;	/* Unknown - driver assigned */
@@ -1023,6 +1025,11 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
 	if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set)
 		device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1;
 
+	/* Presence of _PS3 or _PRx means we can put the device into D3 cold */
+	if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set ||
+			device->power.flags.power_resources)
+		device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1;
+
 	acpi_bus_init_power(device);
 
 	return 0;
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index fdcdbb6..13a285d 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -18,7 +18,6 @@
 #include <linux/reboot.h>
 #include <linux/acpi.h>
 #include <linux/module.h>
-#include <linux/pm_runtime.h>
 
 #include <asm/io.h>
 
@@ -81,6 +80,12 @@ static int acpi_sleep_prepare(u32 acpi_state)
 
 #ifdef CONFIG_ACPI_SLEEP
 static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+
+u32 acpi_target_system_state(void)
+{
+	return acpi_target_sleep_state;
+}
+
 static bool pwr_btn_event_pending;
 
 /*
@@ -681,177 +686,6 @@ int acpi_suspend(u32 acpi_state)
 	return -EINVAL;
 }
 
-#ifdef CONFIG_PM
-/**
- *	acpi_pm_device_sleep_state - return preferred power state of ACPI device
- *		in the system sleep state given by %acpi_target_sleep_state
- *	@dev: device to examine; its driver model wakeup flags control
- *		whether it should be able to wake up the system
- *	@d_min_p: used to store the upper limit of allowed states range
- *	@d_max_in: specify the lowest allowed states
- *	Return value: preferred power state of the device on success, -ENODEV
- *	(ie. if there's no 'struct acpi_device' for @dev) or -EINVAL on failure
- *
- *	Find the lowest power (highest number) ACPI device power state that
- *	device @dev can be in while the system is in the sleep state represented
- *	by %acpi_target_sleep_state.  If @wake is nonzero, the device should be
- *	able to wake up the system from this sleep state.  If @d_min_p is set,
- *	the highest power (lowest number) device power state of @dev allowed
- *	in this system sleep state is stored at the location pointed to by it.
- *
- *	The caller must ensure that @dev is valid before using this function.
- *	The caller is also responsible for figuring out if the device is
- *	supposed to be able to wake up the system and passing this information
- *	via @wake.
- */
-
-int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
-{
-	acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
-	struct acpi_device *adev;
-	char acpi_method[] = "_SxD";
-	unsigned long long d_min, d_max;
-
-	if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3)
-		return -EINVAL;
-	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
-		printk(KERN_DEBUG "ACPI handle has no context!\n");
-		return -ENODEV;
-	}
-
-	acpi_method[2] = '0' + acpi_target_sleep_state;
-	/*
-	 * If the sleep state is S0, the lowest limit from ACPI is D3,
-	 * but if the device has _S0W, we will use the value from _S0W
-	 * as the lowest limit from ACPI.  Finally, we will constrain
-	 * the lowest limit with the specified one.
-	 */
-	d_min = ACPI_STATE_D0;
-	d_max = ACPI_STATE_D3;
-
-	/*
-	 * If present, _SxD methods return the minimum D-state (highest power
-	 * state) we can use for the corresponding S-states.  Otherwise, the
-	 * minimum D-state is D0 (ACPI 3.x).
-	 *
-	 * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
-	 * provided -- that's our fault recovery, we ignore retval.
-	 */
-	if (acpi_target_sleep_state > ACPI_STATE_S0)
-		acpi_evaluate_integer(handle, acpi_method, NULL, &d_min);
-
-	/*
-	 * If _PRW says we can wake up the system from the target sleep state,
-	 * the D-state returned by _SxD is sufficient for that (we assume a
-	 * wakeup-aware driver if wake is set).  Still, if _SxW exists
-	 * (ACPI 3.x), it should return the maximum (lowest power) D-state that
-	 * can wake the system.  _S0W may be valid, too.
-	 */
-	if (acpi_target_sleep_state == ACPI_STATE_S0 ||
-	    (device_may_wakeup(dev) && adev->wakeup.flags.valid &&
-	     adev->wakeup.sleep_state >= acpi_target_sleep_state)) {
-		acpi_status status;
-
-		acpi_method[3] = 'W';
-		status = acpi_evaluate_integer(handle, acpi_method, NULL,
-						&d_max);
-		if (ACPI_FAILURE(status)) {
-			if (acpi_target_sleep_state != ACPI_STATE_S0 ||
-			    status != AE_NOT_FOUND)
-				d_max = d_min;
-		} else if (d_max < d_min) {
-			/* Warn the user of the broken DSDT */
-			printk(KERN_WARNING "ACPI: Wrong value from %s\n",
-				acpi_method);
-			/* Sanitize it */
-			d_min = d_max;
-		}
-	}
-
-	if (d_max_in < d_min)
-		return -EINVAL;
-	if (d_min_p)
-		*d_min_p = d_min;
-	/* constrain d_max with specified lowest limit (max number) */
-	if (d_max > d_max_in) {
-		for (d_max = d_max_in; d_max > d_min; d_max--) {
-			if (adev->power.states[d_max].flags.valid)
-				break;
-		}
-	}
-	return d_max;
-}
-EXPORT_SYMBOL(acpi_pm_device_sleep_state);
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_PM_SLEEP
-/**
- * acpi_pm_device_run_wake - Enable/disable wake-up for given device.
- * @phys_dev: Device to enable/disable the platform to wake-up the system for.
- * @enable: Whether enable or disable the wake-up functionality.
- *
- * Find the ACPI device object corresponding to @pci_dev and try to
- * enable/disable the GPE associated with it.
- */
-int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
-{
-	struct acpi_device *dev;
-	acpi_handle handle;
-
-	if (!device_run_wake(phys_dev))
-		return -EINVAL;
-
-	handle = DEVICE_ACPI_HANDLE(phys_dev);
-	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
-		dev_dbg(phys_dev, "ACPI handle has no context in %s!\n",
-			__func__);
-		return -ENODEV;
-	}
-
-	if (enable) {
-		acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0);
-		acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
-	} else {
-		acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
-		acpi_disable_wakeup_device_power(dev);
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(acpi_pm_device_run_wake);
-
-/**
- *	acpi_pm_device_sleep_wake - enable or disable the system wake-up
- *                                  capability of given device
- *	@dev: device to handle
- *	@enable: 'true' - enable, 'false' - disable the wake-up capability
- */
-int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
-{
-	acpi_handle handle;
-	struct acpi_device *adev;
-	int error;
-
-	if (!device_can_wakeup(dev))
-		return -EINVAL;
-
-	handle = DEVICE_ACPI_HANDLE(dev);
-	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
-		dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
-		return -ENODEV;
-	}
-
-	error = enable ?
-		acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
-		acpi_disable_wakeup_device_power(adev);
-	if (!error)
-		dev_info(dev, "wake-up capability %s by ACPI\n",
-				enable ? "enabled" : "disabled");
-
-	return error;
-}
-#endif  /* CONFIG_PM_SLEEP */
-
 static void acpi_power_off_prepare(void)
 {
 	/* Prepare to power off the system */
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 96b71b6..acc3a8d 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -470,10 +470,19 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
 		return -EBUSY;
 
 	not_suspended = 0;
-	list_for_each_entry(pdd, &genpd->dev_list, list_node)
+	list_for_each_entry(pdd, &genpd->dev_list, list_node) {
+		enum pm_qos_flags_status stat;
+
+		stat = dev_pm_qos_flags(pdd->dev,
+					PM_QOS_FLAG_NO_POWER_OFF
+						| PM_QOS_FLAG_REMOTE_WAKEUP);
+		if (stat > PM_QOS_FLAGS_NONE)
+			return -EBUSY;
+
 		if (pdd->dev->driver && (!pm_runtime_suspended(pdd->dev)
 		    || pdd->dev->power.irq_safe))
 			not_suspended++;
+	}
 
 	if (not_suspended > genpd->in_progress)
 		return -EBUSY;
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index 0dbfdf4..b16686a 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -93,8 +93,10 @@ extern void dpm_sysfs_remove(struct device *dev);
 extern void rpm_sysfs_remove(struct device *dev);
 extern int wakeup_sysfs_add(struct device *dev);
 extern void wakeup_sysfs_remove(struct device *dev);
-extern int pm_qos_sysfs_add(struct device *dev);
-extern void pm_qos_sysfs_remove(struct device *dev);
+extern int pm_qos_sysfs_add_latency(struct device *dev);
+extern void pm_qos_sysfs_remove_latency(struct device *dev);
+extern int pm_qos_sysfs_add_flags(struct device *dev);
+extern void pm_qos_sysfs_remove_flags(struct device *dev);
 
 #else /* CONFIG_PM */
 
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 74a67e0..fdc3894 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -40,6 +40,7 @@
 #include <linux/device.h>
 #include <linux/mutex.h>
 #include <linux/export.h>
+#include <linux/pm_runtime.h>
 
 #include "power.h"
 
@@ -48,6 +49,50 @@ static DEFINE_MUTEX(dev_pm_qos_mtx);
 static BLOCKING_NOTIFIER_HEAD(dev_pm_notifiers);
 
 /**
+ * __dev_pm_qos_flags - Check PM QoS flags for a given device.
+ * @dev: Device to check the PM QoS flags for.
+ * @mask: Flags to check against.
+ *
+ * This routine must be called with dev->power.lock held.
+ */
+enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask)
+{
+	struct dev_pm_qos *qos = dev->power.qos;
+	struct pm_qos_flags *pqf;
+	s32 val;
+
+	if (!qos)
+		return PM_QOS_FLAGS_UNDEFINED;
+
+	pqf = &qos->flags;
+	if (list_empty(&pqf->list))
+		return PM_QOS_FLAGS_UNDEFINED;
+
+	val = pqf->effective_flags & mask;
+	if (val)
+		return (val == mask) ? PM_QOS_FLAGS_ALL : PM_QOS_FLAGS_SOME;
+
+	return PM_QOS_FLAGS_NONE;
+}
+
+/**
+ * dev_pm_qos_flags - Check PM QoS flags for a given device (locked).
+ * @dev: Device to check the PM QoS flags for.
+ * @mask: Flags to check against.
+ */
+enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask)
+{
+	unsigned long irqflags;
+	enum pm_qos_flags_status ret;
+
+	spin_lock_irqsave(&dev->power.lock, irqflags);
+	ret = __dev_pm_qos_flags(dev, mask);
+	spin_unlock_irqrestore(&dev->power.lock, irqflags);
+
+	return ret;
+}
+
+/**
  * __dev_pm_qos_read_value - Get PM QoS constraint for a given device.
  * @dev: Device to get the PM QoS constraint value for.
  *
@@ -55,9 +100,7 @@ static BLOCKING_NOTIFIER_HEAD(dev_pm_notifiers);
  */
 s32 __dev_pm_qos_read_value(struct device *dev)
 {
-	struct pm_qos_constraints *c = dev->power.constraints;
-
-	return c ? pm_qos_read_value(c) : 0;
+	return dev->power.qos ? pm_qos_read_value(&dev->power.qos->latency) : 0;
 }
 
 /**
@@ -76,30 +119,39 @@ s32 dev_pm_qos_read_value(struct device *dev)
 	return ret;
 }
 
-/*
- * apply_constraint
- * @req: constraint request to apply
- * @action: action to perform add/update/remove, of type enum pm_qos_req_action
- * @value: defines the qos request
+/**
+ * apply_constraint - Add/modify/remove device PM QoS request.
+ * @req: Constraint request to apply
+ * @action: Action to perform (add/update/remove).
+ * @value: Value to assign to the QoS request.
  *
  * Internal function to update the constraints list using the PM QoS core
  * code and if needed call the per-device and the global notification
  * callbacks
  */
 static int apply_constraint(struct dev_pm_qos_request *req,
-			    enum pm_qos_req_action action, int value)
+			    enum pm_qos_req_action action, s32 value)
 {
-	int ret, curr_value;
-
-	ret = pm_qos_update_target(req->dev->power.constraints,
-				   &req->node, action, value);
+	struct dev_pm_qos *qos = req->dev->power.qos;
+	int ret;
 
-	if (ret) {
-		/* Call the global callbacks if needed */
-		curr_value = pm_qos_read_value(req->dev->power.constraints);
-		blocking_notifier_call_chain(&dev_pm_notifiers,
-					     (unsigned long)curr_value,
-					     req);
+	switch(req->type) {
+	case DEV_PM_QOS_LATENCY:
+		ret = pm_qos_update_target(&qos->latency, &req->data.pnode,
+					   action, value);
+		if (ret) {
+			value = pm_qos_read_value(&qos->latency);
+			blocking_notifier_call_chain(&dev_pm_notifiers,
+						     (unsigned long)value,
+						     req);
+		}
+		break;
+	case DEV_PM_QOS_FLAGS:
+		ret = pm_qos_update_flags(&qos->flags, &req->data.flr,
+					  action, value);
+		break;
+	default:
+		ret = -EINVAL;
 	}
 
 	return ret;
@@ -114,28 +166,32 @@ static int apply_constraint(struct dev_pm_qos_request *req,
  */
 static int dev_pm_qos_constraints_allocate(struct device *dev)
 {
+	struct dev_pm_qos *qos;
 	struct pm_qos_constraints *c;
 	struct blocking_notifier_head *n;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
-	if (!c)
+	qos = kzalloc(sizeof(*qos), GFP_KERNEL);
+	if (!qos)
 		return -ENOMEM;
 
 	n = kzalloc(sizeof(*n), GFP_KERNEL);
 	if (!n) {
-		kfree(c);
+		kfree(qos);
 		return -ENOMEM;
 	}
 	BLOCKING_INIT_NOTIFIER_HEAD(n);
 
+	c = &qos->latency;
 	plist_head_init(&c->list);
 	c->target_value = PM_QOS_DEV_LAT_DEFAULT_VALUE;
 	c->default_value = PM_QOS_DEV_LAT_DEFAULT_VALUE;
 	c->type = PM_QOS_MIN;
 	c->notifiers = n;
 
+	INIT_LIST_HEAD(&qos->flags.list);
+
 	spin_lock_irq(&dev->power.lock);
-	dev->power.constraints = c;
+	dev->power.qos = qos;
 	spin_unlock_irq(&dev->power.lock);
 
 	return 0;
@@ -151,7 +207,7 @@ static int dev_pm_qos_constraints_allocate(struct device *dev)
 void dev_pm_qos_constraints_init(struct device *dev)
 {
 	mutex_lock(&dev_pm_qos_mtx);
-	dev->power.constraints = NULL;
+	dev->power.qos = NULL;
 	dev->power.power_state = PMSG_ON;
 	mutex_unlock(&dev_pm_qos_mtx);
 }
@@ -164,6 +220,7 @@ void dev_pm_qos_constraints_init(struct device *dev)
  */
 void dev_pm_qos_constraints_destroy(struct device *dev)
 {
+	struct dev_pm_qos *qos;
 	struct dev_pm_qos_request *req, *tmp;
 	struct pm_qos_constraints *c;
 
@@ -176,12 +233,13 @@ void dev_pm_qos_constraints_destroy(struct device *dev)
 	mutex_lock(&dev_pm_qos_mtx);
 
 	dev->power.power_state = PMSG_INVALID;
-	c = dev->power.constraints;
-	if (!c)
+	qos = dev->power.qos;
+	if (!qos)
 		goto out;
 
+	c = &qos->latency;
 	/* Flush the constraints list for the device */
-	plist_for_each_entry_safe(req, tmp, &c->list, node) {
+	plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) {
 		/*
 		 * Update constraints list and call the notification
 		 * callbacks if needed
@@ -191,11 +249,11 @@ void dev_pm_qos_constraints_destroy(struct device *dev)
 	}
 
 	spin_lock_irq(&dev->power.lock);
-	dev->power.constraints = NULL;
+	dev->power.qos = NULL;
 	spin_unlock_irq(&dev->power.lock);
 
 	kfree(c->notifiers);
-	kfree(c);
+	kfree(qos);
 
  out:
 	mutex_unlock(&dev_pm_qos_mtx);
@@ -205,6 +263,7 @@ void dev_pm_qos_constraints_destroy(struct device *dev)
  * dev_pm_qos_add_request - inserts new qos request into the list
  * @dev: target device for the constraint
  * @req: pointer to a preallocated handle
+ * @type: type of the request
  * @value: defines the qos request
  *
  * This function inserts a new entry in the device constraints list of
@@ -218,9 +277,12 @@ void dev_pm_qos_constraints_destroy(struct device *dev)
  * -EINVAL in case of wrong parameters, -ENOMEM if there's not enough memory
  * to allocate for data structures, -ENODEV if the device has just been removed
  * from the system.
+ *
+ * Callers should ensure that the target device is not RPM_SUSPENDED before
+ * using this function for requests of type DEV_PM_QOS_FLAGS.
  */
 int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
-			   s32 value)
+			   enum dev_pm_qos_req_type type, s32 value)
 {
 	int ret = 0;
 
@@ -235,7 +297,7 @@ int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
 
 	mutex_lock(&dev_pm_qos_mtx);
 
-	if (!dev->power.constraints) {
+	if (!dev->power.qos) {
 		if (dev->power.power_state.event == PM_EVENT_INVALID) {
 			/* The device has been removed from the system. */
 			req->dev = NULL;
@@ -251,8 +313,10 @@ int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
 		}
 	}
 
-	if (!ret)
+	if (!ret) {
+		req->type = type;
 		ret = apply_constraint(req, PM_QOS_ADD_REQ, value);
+	}
 
  out:
 	mutex_unlock(&dev_pm_qos_mtx);
@@ -262,6 +326,37 @@ int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
 EXPORT_SYMBOL_GPL(dev_pm_qos_add_request);
 
 /**
+ * __dev_pm_qos_update_request - Modify an existing device PM QoS request.
+ * @req : PM QoS request to modify.
+ * @new_value: New value to request.
+ */
+static int __dev_pm_qos_update_request(struct dev_pm_qos_request *req,
+				       s32 new_value)
+{
+	s32 curr_value;
+	int ret = 0;
+
+	if (!req->dev->power.qos)
+		return -ENODEV;
+
+	switch(req->type) {
+	case DEV_PM_QOS_LATENCY:
+		curr_value = req->data.pnode.prio;
+		break;
+	case DEV_PM_QOS_FLAGS:
+		curr_value = req->data.flr.flags;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (curr_value != new_value)
+		ret = apply_constraint(req, PM_QOS_UPDATE_REQ, new_value);
+
+	return ret;
+}
+
+/**
  * dev_pm_qos_update_request - modifies an existing qos request
  * @req : handle to list element holding a dev_pm_qos request to use
  * @new_value: defines the qos request
@@ -275,11 +370,13 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_add_request);
  * 0 if the aggregated constraint value has not changed,
  * -EINVAL in case of wrong parameters, -ENODEV if the device has been
  * removed from the system
+ *
+ * Callers should ensure that the target device is not RPM_SUSPENDED before
+ * using this function for requests of type DEV_PM_QOS_FLAGS.
  */
-int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
-			      s32 new_value)
+int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value)
 {
-	int ret = 0;
+	int ret;
 
 	if (!req) /*guard against callers passing in null */
 		return -EINVAL;
@@ -289,17 +386,9 @@ int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
 		return -EINVAL;
 
 	mutex_lock(&dev_pm_qos_mtx);
-
-	if (req->dev->power.constraints) {
-		if (new_value != req->node.prio)
-			ret = apply_constraint(req, PM_QOS_UPDATE_REQ,
-					       new_value);
-	} else {
-		/* Return if the device has been removed */
-		ret = -ENODEV;
-	}
-
+	ret = __dev_pm_qos_update_request(req, new_value);
 	mutex_unlock(&dev_pm_qos_mtx);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_qos_update_request);
@@ -315,6 +404,9 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_update_request);
  * 0 if the aggregated constraint value has not changed,
  * -EINVAL in case of wrong parameters, -ENODEV if the device has been
  * removed from the system
+ *
+ * Callers should ensure that the target device is not RPM_SUSPENDED before
+ * using this function for requests of type DEV_PM_QOS_FLAGS.
  */
 int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
 {
@@ -329,7 +421,7 @@ int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
 
 	mutex_lock(&dev_pm_qos_mtx);
 
-	if (req->dev->power.constraints) {
+	if (req->dev->power.qos) {
 		ret = apply_constraint(req, PM_QOS_REMOVE_REQ,
 				       PM_QOS_DEFAULT_VALUE);
 		memset(req, 0, sizeof(*req));
@@ -362,13 +454,13 @@ int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier)
 
 	mutex_lock(&dev_pm_qos_mtx);
 
-	if (!dev->power.constraints)
+	if (!dev->power.qos)
 		ret = dev->power.power_state.event != PM_EVENT_INVALID ?
 			dev_pm_qos_constraints_allocate(dev) : -ENODEV;
 
 	if (!ret)
 		ret = blocking_notifier_chain_register(
-				dev->power.constraints->notifiers, notifier);
+				dev->power.qos->latency.notifiers, notifier);
 
 	mutex_unlock(&dev_pm_qos_mtx);
 	return ret;
@@ -393,9 +485,9 @@ int dev_pm_qos_remove_notifier(struct device *dev,
 	mutex_lock(&dev_pm_qos_mtx);
 
 	/* Silently return if the constraints object is not present. */
-	if (dev->power.constraints)
+	if (dev->power.qos)
 		retval = blocking_notifier_chain_unregister(
-				dev->power.constraints->notifiers,
+				dev->power.qos->latency.notifiers,
 				notifier);
 
 	mutex_unlock(&dev_pm_qos_mtx);
@@ -449,7 +541,8 @@ int dev_pm_qos_add_ancestor_request(struct device *dev,
 		ancestor = ancestor->parent;
 
 	if (ancestor)
-		error = dev_pm_qos_add_request(ancestor, req, value);
+		error = dev_pm_qos_add_request(ancestor, req,
+					       DEV_PM_QOS_LATENCY, value);
 
 	if (error)
 		req->dev = NULL;
@@ -459,10 +552,19 @@ int dev_pm_qos_add_ancestor_request(struct device *dev,
 EXPORT_SYMBOL_GPL(dev_pm_qos_add_ancestor_request);
 
 #ifdef CONFIG_PM_RUNTIME
-static void __dev_pm_qos_drop_user_request(struct device *dev)
+static void __dev_pm_qos_drop_user_request(struct device *dev,
+					   enum dev_pm_qos_req_type type)
 {
-	dev_pm_qos_remove_request(dev->power.pq_req);
-	dev->power.pq_req = NULL;
+	switch(type) {
+	case DEV_PM_QOS_LATENCY:
+		dev_pm_qos_remove_request(dev->power.qos->latency_req);
+		dev->power.qos->latency_req = NULL;
+		break;
+	case DEV_PM_QOS_FLAGS:
+		dev_pm_qos_remove_request(dev->power.qos->flags_req);
+		dev->power.qos->flags_req = NULL;
+		break;
+	}
 }
 
 /**
@@ -478,21 +580,21 @@ int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
 	if (!device_is_registered(dev) || value < 0)
 		return -EINVAL;
 
-	if (dev->power.pq_req)
+	if (dev->power.qos && dev->power.qos->latency_req)
 		return -EEXIST;
 
 	req = kzalloc(sizeof(*req), GFP_KERNEL);
 	if (!req)
 		return -ENOMEM;
 
-	ret = dev_pm_qos_add_request(dev, req, value);
+	ret = dev_pm_qos_add_request(dev, req, DEV_PM_QOS_LATENCY, value);
 	if (ret < 0)
 		return ret;
 
-	dev->power.pq_req = req;
-	ret = pm_qos_sysfs_add(dev);
+	dev->power.qos->latency_req = req;
+	ret = pm_qos_sysfs_add_latency(dev);
 	if (ret)
-		__dev_pm_qos_drop_user_request(dev);
+		__dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_LATENCY);
 
 	return ret;
 }
@@ -504,10 +606,92 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_expose_latency_limit);
  */
 void dev_pm_qos_hide_latency_limit(struct device *dev)
 {
-	if (dev->power.pq_req) {
-		pm_qos_sysfs_remove(dev);
-		__dev_pm_qos_drop_user_request(dev);
+	if (dev->power.qos && dev->power.qos->latency_req) {
+		pm_qos_sysfs_remove_latency(dev);
+		__dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_LATENCY);
 	}
 }
 EXPORT_SYMBOL_GPL(dev_pm_qos_hide_latency_limit);
+
+/**
+ * dev_pm_qos_expose_flags - Expose PM QoS flags of a device to user space.
+ * @dev: Device whose PM QoS flags are to be exposed to user space.
+ * @val: Initial values of the flags.
+ */
+int dev_pm_qos_expose_flags(struct device *dev, s32 val)
+{
+	struct dev_pm_qos_request *req;
+	int ret;
+
+	if (!device_is_registered(dev))
+		return -EINVAL;
+
+	if (dev->power.qos && dev->power.qos->flags_req)
+		return -EEXIST;
+
+	req = kzalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	pm_runtime_get_sync(dev);
+	ret = dev_pm_qos_add_request(dev, req, DEV_PM_QOS_FLAGS, val);
+	if (ret < 0)
+		goto fail;
+
+	dev->power.qos->flags_req = req;
+	ret = pm_qos_sysfs_add_flags(dev);
+	if (ret)
+		__dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_FLAGS);
+
+fail:
+	pm_runtime_put(dev);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(dev_pm_qos_expose_flags);
+
+/**
+ * dev_pm_qos_hide_flags - Hide PM QoS flags of a device from user space.
+ * @dev: Device whose PM QoS flags are to be hidden from user space.
+ */
+void dev_pm_qos_hide_flags(struct device *dev)
+{
+	if (dev->power.qos && dev->power.qos->flags_req) {
+		pm_qos_sysfs_remove_flags(dev);
+		pm_runtime_get_sync(dev);
+		__dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_FLAGS);
+		pm_runtime_put(dev);
+	}
+}
+EXPORT_SYMBOL_GPL(dev_pm_qos_hide_flags);
+
+/**
+ * dev_pm_qos_update_flags - Update PM QoS flags request owned by user space.
+ * @dev: Device to update the PM QoS flags request for.
+ * @mask: Flags to set/clear.
+ * @set: Whether to set or clear the flags (true means set).
+ */
+int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set)
+{
+	s32 value;
+	int ret;
+
+	if (!dev->power.qos || !dev->power.qos->flags_req)
+		return -EINVAL;
+
+	pm_runtime_get_sync(dev);
+	mutex_lock(&dev_pm_qos_mtx);
+
+	value = dev_pm_qos_requested_flags(dev);
+	if (set)
+		value |= mask;
+	else
+		value &= ~mask;
+
+	ret = __dev_pm_qos_update_request(dev->power.qos->flags_req, value);
+
+	mutex_unlock(&dev_pm_qos_mtx);
+	pm_runtime_put(dev);
+
+	return ret;
+}
 #endif /* CONFIG_PM_RUNTIME */
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index b91dc6f..50d16e3 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -221,7 +221,7 @@ static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show,
 static ssize_t pm_qos_latency_show(struct device *dev,
 				   struct device_attribute *attr, char *buf)
 {
-	return sprintf(buf, "%d\n", dev->power.pq_req->node.prio);
+	return sprintf(buf, "%d\n", dev_pm_qos_requested_latency(dev));
 }
 
 static ssize_t pm_qos_latency_store(struct device *dev,
@@ -237,12 +237,66 @@ static ssize_t pm_qos_latency_store(struct device *dev,
 	if (value < 0)
 		return -EINVAL;
 
-	ret = dev_pm_qos_update_request(dev->power.pq_req, value);
+	ret = dev_pm_qos_update_request(dev->power.qos->latency_req, value);
 	return ret < 0 ? ret : n;
 }
 
 static DEVICE_ATTR(pm_qos_resume_latency_us, 0644,
 		   pm_qos_latency_show, pm_qos_latency_store);
+
+static ssize_t pm_qos_no_power_off_show(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
+					& PM_QOS_FLAG_NO_POWER_OFF));
+}
+
+static ssize_t pm_qos_no_power_off_store(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t n)
+{
+	int ret;
+
+	if (kstrtoint(buf, 0, &ret))
+		return -EINVAL;
+
+	if (ret != 0 && ret != 1)
+		return -EINVAL;
+
+	ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_NO_POWER_OFF, ret);
+	return ret < 0 ? ret : n;
+}
+
+static DEVICE_ATTR(pm_qos_no_power_off, 0644,
+		   pm_qos_no_power_off_show, pm_qos_no_power_off_store);
+
+static ssize_t pm_qos_remote_wakeup_show(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
+					& PM_QOS_FLAG_REMOTE_WAKEUP));
+}
+
+static ssize_t pm_qos_remote_wakeup_store(struct device *dev,
+					  struct device_attribute *attr,
+					  const char *buf, size_t n)
+{
+	int ret;
+
+	if (kstrtoint(buf, 0, &ret))
+		return -EINVAL;
+
+	if (ret != 0 && ret != 1)
+		return -EINVAL;
+
+	ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP, ret);
+	return ret < 0 ? ret : n;
+}
+
+static DEVICE_ATTR(pm_qos_remote_wakeup, 0644,
+		   pm_qos_remote_wakeup_show, pm_qos_remote_wakeup_store);
 #endif /* CONFIG_PM_RUNTIME */
 
 #ifdef CONFIG_PM_SLEEP
@@ -564,15 +618,27 @@ static struct attribute_group pm_runtime_attr_group = {
 	.attrs	= runtime_attrs,
 };
 
-static struct attribute *pm_qos_attrs[] = {
+static struct attribute *pm_qos_latency_attrs[] = {
 #ifdef CONFIG_PM_RUNTIME
 	&dev_attr_pm_qos_resume_latency_us.attr,
 #endif /* CONFIG_PM_RUNTIME */
 	NULL,
 };
-static struct attribute_group pm_qos_attr_group = {
+static struct attribute_group pm_qos_latency_attr_group = {
 	.name	= power_group_name,
-	.attrs	= pm_qos_attrs,
+	.attrs	= pm_qos_latency_attrs,
+};
+
+static struct attribute *pm_qos_flags_attrs[] = {
+#ifdef CONFIG_PM_RUNTIME
+	&dev_attr_pm_qos_no_power_off.attr,
+	&dev_attr_pm_qos_remote_wakeup.attr,
+#endif /* CONFIG_PM_RUNTIME */
+	NULL,
+};
+static struct attribute_group pm_qos_flags_attr_group = {
+	.name	= power_group_name,
+	.attrs	= pm_qos_flags_attrs,
 };
 
 int dpm_sysfs_add(struct device *dev)
@@ -615,14 +681,24 @@ void wakeup_sysfs_remove(struct device *dev)
 	sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
 }
 
-int pm_qos_sysfs_add(struct device *dev)
+int pm_qos_sysfs_add_latency(struct device *dev)
+{
+	return sysfs_merge_group(&dev->kobj, &pm_qos_latency_attr_group);
+}
+
+void pm_qos_sysfs_remove_latency(struct device *dev)
+{
+	sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_attr_group);
+}
+
+int pm_qos_sysfs_add_flags(struct device *dev)
 {
-	return sysfs_merge_group(&dev->kobj, &pm_qos_attr_group);
+	return sysfs_merge_group(&dev->kobj, &pm_qos_flags_attr_group);
 }
 
-void pm_qos_sysfs_remove(struct device *dev)
+void pm_qos_sysfs_remove_flags(struct device *dev)
 {
-	sysfs_unmerge_group(&dev->kobj, &pm_qos_attr_group);
+	sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group);
 }
 
 void rpm_sysfs_remove(struct device *dev)
diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c
index 4fbfe96..f48ac5d 100644
--- a/drivers/mtd/nand/sh_flctl.c
+++ b/drivers/mtd/nand/sh_flctl.c
@@ -727,7 +727,9 @@ static void flctl_select_chip(struct mtd_info *mtd, int chipnr)
 
 		if (!flctl->qos_request) {
 			ret = dev_pm_qos_add_request(&flctl->pdev->dev,
-							&flctl->pm_qos, 100);
+							&flctl->pm_qos,
+							DEV_PM_QOS_LATENCY,
+							100);
 			if (ret < 0)
 				dev_err(&flctl->pdev->dev,
 					"PM QoS request failed: %d\n", ret);
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index c5792d6..1af4008 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -17,10 +17,9 @@
 
 #include <linux/pci-acpi.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_qos.h>
 #include "pci.h"
 
-static DEFINE_MUTEX(pci_acpi_pm_notify_mtx);
-
 /**
  * pci_acpi_wake_bus - Wake-up notification handler for root buses.
  * @handle: ACPI handle of a device the notification is for.
@@ -68,67 +67,6 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
 }
 
 /**
- * add_pm_notifier - Register PM notifier for given ACPI device.
- * @dev: ACPI device to add the notifier for.
- * @context: PCI device or bus to check for PME status if an event is signaled.
- *
- * NOTE: @dev need not be a run-wake or wake-up device to be a valid source of
- * PM wake-up events.  For example, wake-up events may be generated for bridges
- * if one of the devices below the bridge is signaling PME, even if the bridge
- * itself doesn't have a wake-up GPE associated with it.
- */
-static acpi_status add_pm_notifier(struct acpi_device *dev,
-				   acpi_notify_handler handler,
-				   void *context)
-{
-	acpi_status status = AE_ALREADY_EXISTS;
-
-	mutex_lock(&pci_acpi_pm_notify_mtx);
-
-	if (dev->wakeup.flags.notifier_present)
-		goto out;
-
-	status = acpi_install_notify_handler(dev->handle,
-					     ACPI_SYSTEM_NOTIFY,
-					     handler, context);
-	if (ACPI_FAILURE(status))
-		goto out;
-
-	dev->wakeup.flags.notifier_present = true;
-
- out:
-	mutex_unlock(&pci_acpi_pm_notify_mtx);
-	return status;
-}
-
-/**
- * remove_pm_notifier - Unregister PM notifier from given ACPI device.
- * @dev: ACPI device to remove the notifier from.
- */
-static acpi_status remove_pm_notifier(struct acpi_device *dev,
-				      acpi_notify_handler handler)
-{
-	acpi_status status = AE_BAD_PARAMETER;
-
-	mutex_lock(&pci_acpi_pm_notify_mtx);
-
-	if (!dev->wakeup.flags.notifier_present)
-		goto out;
-
-	status = acpi_remove_notify_handler(dev->handle,
-					    ACPI_SYSTEM_NOTIFY,
-					    handler);
-	if (ACPI_FAILURE(status))
-		goto out;
-
-	dev->wakeup.flags.notifier_present = false;
-
- out:
-	mutex_unlock(&pci_acpi_pm_notify_mtx);
-	return status;
-}
-
-/**
  * pci_acpi_add_bus_pm_notifier - Register PM notifier for given PCI bus.
  * @dev: ACPI device to add the notifier for.
  * @pci_bus: PCI bus to walk checking for PME status if an event is signaled.
@@ -136,7 +74,7 @@ static acpi_status remove_pm_notifier(struct acpi_device *dev,
 acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev,
 					 struct pci_bus *pci_bus)
 {
-	return add_pm_notifier(dev, pci_acpi_wake_bus, pci_bus);
+	return acpi_add_pm_notifier(dev, pci_acpi_wake_bus, pci_bus);
 }
 
 /**
@@ -145,7 +83,7 @@ acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev,
  */
 acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
 {
-	return remove_pm_notifier(dev, pci_acpi_wake_bus);
+	return acpi_remove_pm_notifier(dev, pci_acpi_wake_bus);
 }
 
 /**
@@ -156,7 +94,7 @@ acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
 acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
 				     struct pci_dev *pci_dev)
 {
-	return add_pm_notifier(dev, pci_acpi_wake_dev, pci_dev);
+	return acpi_add_pm_notifier(dev, pci_acpi_wake_dev, pci_dev);
 }
 
 /**
@@ -165,7 +103,7 @@ acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
  */
 acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
 {
-	return remove_pm_notifier(dev, pci_acpi_wake_dev);
+	return acpi_remove_pm_notifier(dev, pci_acpi_wake_dev);
 }
 
 phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
@@ -257,11 +195,16 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 		return -ENODEV;
 
 	switch (state) {
+	case PCI_D3cold:
+		if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) ==
+				PM_QOS_FLAGS_ALL) {
+			error = -EBUSY;
+			break;
+		}
 	case PCI_D0:
 	case PCI_D1:
 	case PCI_D2:
 	case PCI_D3hot:
-	case PCI_D3cold:
 		error = acpi_bus_set_power(handle, state_conv[state]);
 	}