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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-27 13:42:42 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-27 13:42:42 +0100
commit45c36462aef0cccadb7755ea4edc78d13334a2be (patch)
treed707b2863494452585941d3818347005f34c636e /drivers/acpi
parentc4e050376c69bb9d67895842665264df2a2004d9 (diff)
parentb88ce2a41562d1a9554f209e0f31a32d9f473794 (diff)
downloadlinux-45c36462aef0cccadb7755ea4edc78d13334a2be.tar.bz2
Merge branch 'acpi-dev-pm' into acpi-enumeration
Subsequent commits in this branch will depend on 'acpi-dev-pm' material.
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/Makefile3
-rw-r--r--drivers/acpi/bus.c21
-rw-r--r--drivers/acpi/device_pm.c668
-rw-r--r--drivers/acpi/scan.c9
-rw-r--r--drivers/acpi/sleep.c178
5 files changed, 702 insertions, 177 deletions
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 7198b6d6b763..2a4502becd13 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 d59175efc428..1f0d457ecbcf 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 000000000000..f09dc987cf17
--- /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 671bbe68b96c..d59a60736e1c 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 fdcdbb652915..13a285dffaca 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 */