Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux

[linux-2.6-block.git] / drivers / thermal / thermal_core.c

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 28f7ece0e8feeefe357bb98b53ad742a6f171cfa..46cfb7de4eb289d7b81db525178a5dd5ef6656d4 100644 (file)
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -941,7 +941,7 @@ static void bind_cdev(struct thermal_cooling_device *cdev)
  */
 static struct thermal_cooling_device *
 __thermal_cooling_device_register(struct device_node *np,
-                                 char *type, void *devdata,
+                                 const char *type, void *devdata,
                                  const struct thermal_cooling_device_ops *ops)
 {
        struct thermal_cooling_device *cdev;
@@ -1015,7 +1015,7 @@ __thermal_cooling_device_register(struct device_node *np,
  * ERR_PTR. Caller must check return value with IS_ERR*() helpers.
  */
 struct thermal_cooling_device *
-thermal_cooling_device_register(char *type, void *devdata,
+thermal_cooling_device_register(const char *type, void *devdata,
                                const struct thermal_cooling_device_ops *ops)
 {
        return __thermal_cooling_device_register(NULL, type, devdata, ops);
@@ -1039,13 +1039,62 @@ EXPORT_SYMBOL_GPL(thermal_cooling_device_register);
  */
 struct thermal_cooling_device *
 thermal_of_cooling_device_register(struct device_node *np,
-                                  char *type, void *devdata,
+                                  const char *type, void *devdata,
                                   const struct thermal_cooling_device_ops *ops)
 {
        return __thermal_cooling_device_register(np, type, devdata, ops);
 }
 EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register);
 
+static void thermal_cooling_device_release(struct device *dev, void *res)
+{
+       thermal_cooling_device_unregister(
+                               *(struct thermal_cooling_device **)res);
+}
+
+/**
+ * devm_thermal_of_cooling_device_register() - register an OF thermal cooling
+ *                                            device
+ * @dev:       a valid struct device pointer of a sensor device.
+ * @np:                a pointer to a device tree node.
+ * @type:      the thermal cooling device type.
+ * @devdata:   device private data.
+ * @ops:       standard thermal cooling devices callbacks.
+ *
+ * This function will register a cooling device with device tree node reference.
+ * This interface function adds a new thermal cooling device (fan/processor/...)
+ * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
+ * to all the thermal zone devices registered at the same time.
+ *
+ * Return: a pointer to the created struct thermal_cooling_device or an
+ * ERR_PTR. Caller must check return value with IS_ERR*() helpers.
+ */
+struct thermal_cooling_device *
+devm_thermal_of_cooling_device_register(struct device *dev,
+                               struct device_node *np,
+                               char *type, void *devdata,
+                               const struct thermal_cooling_device_ops *ops)
+{
+       struct thermal_cooling_device **ptr, *tcd;
+
+       ptr = devres_alloc(thermal_cooling_device_release, sizeof(*ptr),
+                          GFP_KERNEL);
+       if (!ptr)
+               return ERR_PTR(-ENOMEM);
+
+       tcd = __thermal_cooling_device_register(np, type, devdata, ops);
+       if (IS_ERR(tcd)) {
+               devres_free(ptr);
+               return tcd;
+       }
+
+       *ptr = tcd;
+       devres_add(dev, ptr);
+
+       return tcd;
+}
+EXPORT_SYMBOL_GPL(devm_thermal_of_cooling_device_register);
+
 static void __unbind(struct thermal_zone_device *tz, int mask,
                     struct thermal_cooling_device *cdev)
 {
@@ -1494,6 +1543,7 @@ static int thermal_pm_notify(struct notifier_block *nb,
                             unsigned long mode, void *_unused)
 {
        struct thermal_zone_device *tz;
+       enum thermal_device_mode tz_mode;
 
        switch (mode) {
        case PM_HIBERNATION_PREPARE:
@@ -1506,6 +1556,13 @@ static int thermal_pm_notify(struct notifier_block *nb,
        case PM_POST_SUSPEND:
                atomic_set(&in_suspend, 0);
                list_for_each_entry(tz, &thermal_tz_list, node) {
+                       tz_mode = THERMAL_DEVICE_ENABLED;
+                       if (tz->ops->get_mode)
+                               tz->ops->get_mode(tz, &tz_mode);
+
+                       if (tz_mode == THERMAL_DEVICE_DISABLED)
+                               continue;
+
                        thermal_zone_device_init(tz);
                        thermal_zone_device_update(tz,
                                                   THERMAL_EVENT_UNSPECIFIED);