5 files changed, 216 insertions, 39 deletions

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 9ac2a9fa90ff..7049a7d27c4f 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -40,9 +40,11 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 #include "sleep.h"
+#include "internal.h"
 
 #define PREFIX "ACPI: "
 
@@ -77,6 +79,20 @@ static struct acpi_driver acpi_power_driver = {
                 },
 };
 
+/*
+ * A power managed device
+ * A device may rely on multiple power resources.
+ * */
+struct acpi_power_managed_device {
+        struct device *dev; /* The physical device */
+        acpi_handle *handle;
+};
+
+struct acpi_power_resource_device {
+        struct acpi_power_managed_device *device;
+        struct acpi_power_resource_device *next;
+};
+
 struct acpi_power_resource {
         struct acpi_device * device;
         acpi_bus_id name;
@@ -84,6 +100,9 @@ struct acpi_power_resource {
         u32 order;
         unsigned int ref_count;
         struct mutex resource_lock;
+
+        /* List of devices relying on this power resource */
+        struct acpi_power_resource_device *devices;
 };
 
 static struct list_head acpi_power_resource_list;
@@ -183,8 +202,26 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
         return 0;
 }
 
+/* Resume the device when all power resources in _PR0 are on */
+static void acpi_power_on_device(struct acpi_power_managed_device *device)
+{
+        struct acpi_device *acpi_dev;
+        acpi_handle handle = device->handle;
+        int state;
+
+        if (acpi_bus_get_device(handle, &acpi_dev))
+                return;
+
+        if(acpi_power_get_inferred_state(acpi_dev, &state))
+                return;
+
+        if (state == ACPI_STATE_D0 && pm_runtime_suspended(device->dev))
+                pm_request_resume(device->dev);
+}
+
 static int __acpi_power_on(struct acpi_power_resource *resource)
 {
+        struct acpi_power_resource_device *device_list = resource->devices;
         acpi_status status = AE_OK;
 
         status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL);
@@ -197,6 +234,12 @@ static int __acpi_power_on(struct acpi_power_resource *resource)
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n",
                           resource->name));
 
+        while (device_list) {
+                acpi_power_on_device(device_list->device);
+
+                device_list = device_list->next;
+        }
+
         return 0;
 }
 
@@ -299,6 +342,125 @@ static int acpi_power_on_list(struct acpi_handle_list *list)
         return result;
 }
 
+static void __acpi_power_resource_unregister_device(struct device *dev,
+                acpi_handle res_handle)
+{
+        struct acpi_power_resource *resource = NULL;
+        struct acpi_power_resource_device *prev, *curr;
+
+        if (acpi_power_get_context(res_handle, &resource))
+                return;
+
+        mutex_lock(&resource->resource_lock);
+        prev = NULL;
+        curr = resource->devices;
+        while (curr) {
+                if (curr->device->dev == dev) {
+                        if (!prev)
+                                resource->devices = curr->next;
+                        else
+                                prev->next = curr->next;
+
+                        kfree(curr);
+                        break;
+                }
+
+                prev = curr;
+                curr = curr->next;
+        }
+        mutex_unlock(&resource->resource_lock);
+}
+
+/* Unlink dev from all power resources in _PR0 */
+void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle)
+{
+        struct acpi_device *acpi_dev;
+        struct acpi_handle_list *list;
+        int i;
+
+        if (!dev || !handle)
+                return;
+
+        if (acpi_bus_get_device(handle, &acpi_dev))
+                return;
+
+        list = &acpi_dev->power.states[ACPI_STATE_D0].resources;
+
+        for (i = 0; i < list->count; i++)
+                __acpi_power_resource_unregister_device(dev,
+                        list->handles[i]);
+}
+
+static int __acpi_power_resource_register_device(
+        struct acpi_power_managed_device *powered_device, acpi_handle handle)
+{
+        struct acpi_power_resource *resource = NULL;
+        struct acpi_power_resource_device *power_resource_device;
+        int result;
+
+        result = acpi_power_get_context(handle, &resource);
+        if (result)
+                return result;
+
+        power_resource_device = kzalloc(
+                sizeof(*power_resource_device), GFP_KERNEL);
+        if (!power_resource_device)
+                return -ENOMEM;
+
+        power_resource_device->device = powered_device;
+
+        mutex_lock(&resource->resource_lock);
+        power_resource_device->next = resource->devices;
+        resource->devices = power_resource_device;
+        mutex_unlock(&resource->resource_lock);
+
+        return 0;
+}
+
+/* Link dev to all power resources in _PR0 */
+int acpi_power_resource_register_device(struct device *dev, acpi_handle handle)
+{
+        struct acpi_device *acpi_dev;
+        struct acpi_handle_list *list;
+        struct acpi_power_managed_device *powered_device;
+        int i, ret;
+
+        if (!dev || !handle)
+                return -ENODEV;
+
+        ret = acpi_bus_get_device(handle, &acpi_dev);
+        if (ret)
+                goto no_power_resource;
+
+        if (!acpi_dev->power.flags.power_resources)
+                goto no_power_resource;
+
+        powered_device = kzalloc(sizeof(*powered_device), GFP_KERNEL);
+        if (!powered_device)
+                return -ENOMEM;
+
+        powered_device->dev = dev;
+        powered_device->handle = handle;
+
+        list = &acpi_dev->power.states[ACPI_STATE_D0].resources;
+
+        for (i = 0; i < list->count; i++) {
+                ret = __acpi_power_resource_register_device(powered_device,
+                        list->handles[i]);
+
+                if (ret) {
+                        acpi_power_resource_unregister_device(dev, handle);
+                        break;
+                }
+        }
+
+        return ret;
+
+no_power_resource:
+        printk(KERN_WARNING PREFIX "Invalid Power Resource to register!");
+        return -ENODEV;
+}
+
 /**
  * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in
  *                          ACPI 3.0) _PSW (Power State Wake)
@@ -500,14 +662,14 @@ int acpi_power_transition(struct acpi_device *device, int state)
 {
         int result;
 
-        if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
+        if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
                 return -EINVAL;
 
         if (device->power.state == state)
                 return 0;
 
         if ((device->power.state < ACPI_STATE_D0)
-            || (device->power.state > ACPI_STATE_D3))
+            || (device->power.state > ACPI_STATE_D3_COLD))
                 return -ENODEV;
 
         /* TBD: Resources must be ordered. */
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5d24a17aa854..767e2dcb9616 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -884,6 +884,13 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
                                 acpi_bus_add_power_resource(ps->resources.handles[j]);
                 }
 
+                /* The exist of _PR3 indicates D3Cold support */
+                if (i == ACPI_STATE_D3) {
+                        status = acpi_get_handle(device->handle, object_name, &handle);
+                        if (ACPI_SUCCESS(status))
+                                device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1;
+                }
+
                 /* Evaluate "_PSx" to see if we can do explicit sets */
                 object_name[2] = 'S';
                 status = acpi_get_handle(device->handle, object_name, &handle);
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index acf81fe86b53..1d661b5c3287 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -18,6 +18,7 @@
 #include <linux/reboot.h>
 #include <linux/acpi.h>
 #include <linux/module.h>
+#include <linux/pm_runtime.h>
 
 #include <asm/io.h>
 
@@ -753,6 +754,40 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
 
 #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;
+}
+
+/**
  *      acpi_pm_device_sleep_wake - enable or disable the system wake-up
  *                                  capability of given device
  *      @dev: device to handle
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 060fd22a1103..0f150f271c2a 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -277,40 +277,6 @@ static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
         return 0;
 }
 
-/**
- * acpi_dev_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.
- */
-static int acpi_dev_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;
-}
-
 static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
 {
         while (bus->parent) {
@@ -318,14 +284,14 @@ static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
 
                 if (bridge->pme_interrupt)
                         return;
-                if (!acpi_dev_run_wake(&bridge->dev, enable))
+                if (!acpi_pm_device_run_wake(&bridge->dev, enable))
                         return;
                 bus = bus->parent;
         }
 
         /* We have reached the root bus. */
         if (bus->bridge)
-                acpi_dev_run_wake(bus->bridge, enable);
+                acpi_pm_device_run_wake(bus->bridge, enable);
 }
 
 static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
@@ -333,7 +299,7 @@ static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
         if (dev->pme_interrupt)
                 return 0;
 
-        if (!acpi_dev_run_wake(&dev->dev, enable))
+        if (!acpi_pm_device_run_wake(&dev->dev, enable))
                 return 0;
 
         acpi_pci_propagate_run_wake(dev->bus, enable);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 6cd5b6403a7b..f1c8ca60e824 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -323,6 +323,8 @@ int acpi_bus_set_power(acpi_handle handle, int state);
 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 bool acpi_bus_power_manageable(acpi_handle handle);
 bool acpi_bus_can_wakeup(acpi_handle handle);
+int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
+void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
 #ifdef CONFIG_ACPI_PROC_EVENT
 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
@@ -392,8 +394,13 @@ static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 #endif
 
 #ifdef CONFIG_PM_SLEEP
+int acpi_pm_device_run_wake(struct device *, bool);
 int acpi_pm_device_sleep_wake(struct device *, bool);
 #else
+static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
+{
+        return -ENODEV;
+}
 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 {
         return -ENODEV;