ACPI / PM: Allow device power states to be used for CONFIG_PM unset

[linux-imx.git] / drivers / acpi / device_pm.c

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 96de787e6104d5509b024d27d4ad9b32527a1d7b..bc493aa3af19d87e42a18da312815de3c6fbb125 100644 (file)
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -37,68 +37,6 @@
 #define _COMPONENT     ACPI_POWER_COMPONENT
 ACPI_MODULE_NAME("device_pm");
 
-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_power_state_string - String representation of ACPI device power state.
  * @state: ACPI device power state to return the string representation of.
@@ -385,6 +323,69 @@ bool acpi_bus_power_manageable(acpi_handle handle)
 }
 EXPORT_SYMBOL(acpi_bus_power_manageable);
 
+#ifdef CONFIG_PM
+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;
+}
+
 bool acpi_bus_can_wakeup(acpi_handle handle)
 {
        struct acpi_device *device;
@@ -1023,3 +1024,4 @@ void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev)
        mutex_unlock(&adev->physical_node_lock);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_pm_remove_dependent);
+#endif /* CONFIG_PM */