Revert "bq27x00_battery: Fix reporting status value for bq27500 battery"

[mv-sheeva.git] / drivers / power / power_supply_core.c

diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 970f7335d3a7f67bade76d6fad08eb954427a949..6ad612726785f48cdd8dbcc2785de8e211aae873 100644 (file)
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -98,7 +98,9 @@ static int __power_supply_is_system_supplied(struct device *dev, void *data)
 {
        union power_supply_propval ret = {0,};
        struct power_supply *psy = dev_get_drvdata(dev);
+       unsigned int *count = data;
 
+       (*count)++;
        if (psy->type != POWER_SUPPLY_TYPE_BATTERY) {
                if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
                        return 0;
@@ -111,10 +113,18 @@ static int __power_supply_is_system_supplied(struct device *dev, void *data)
 int power_supply_is_system_supplied(void)
 {
        int error;
+       unsigned int count = 0;
 
-       error = class_for_each_device(power_supply_class, NULL, NULL,
+       error = class_for_each_device(power_supply_class, NULL, &count,
                                      __power_supply_is_system_supplied);
 
+       /*
+        * If no power class device was found at all, most probably we are
+        * running on a desktop system, so assume we are on mains power.
+        */
+       if (count == 0)
+               return 1;
+
        return error;
 }
 EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
@@ -147,6 +157,12 @@ struct power_supply *power_supply_get_by_name(char *name)
 }
 EXPORT_SYMBOL_GPL(power_supply_get_by_name);
 
+int power_supply_powers(struct power_supply *psy, struct device *dev)
+{
+       return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");
+}
+EXPORT_SYMBOL_GPL(power_supply_powers);
+
 static void power_supply_dev_release(struct device *dev)
 {
        pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
@@ -171,6 +187,8 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
        dev_set_drvdata(dev, psy);
        psy->dev = dev;
 
+       INIT_WORK(&psy->changed_work, power_supply_changed_work);
+
        rc = kobject_set_name(&dev->kobj, "%s", psy->name);
        if (rc)
                goto kobject_set_name_failed;
@@ -179,8 +197,6 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
        if (rc)
                goto device_add_failed;
 
-       INIT_WORK(&psy->changed_work, power_supply_changed_work);
-
        rc = power_supply_create_triggers(psy);
        if (rc)
                goto create_triggers_failed;
@@ -202,6 +218,7 @@ EXPORT_SYMBOL_GPL(power_supply_register);
 void power_supply_unregister(struct power_supply *psy)
 {
        cancel_work_sync(&psy->changed_work);
+       sysfs_remove_link(&psy->dev->kobj, "powers");
        power_supply_remove_triggers(psy);
        device_unregister(psy->dev);
 }