diff options
| -rw-r--r-- | drivers/power/power_supply_core.c | 18 | ||||
| -rw-r--r-- | include/linux/power_supply.h | 8 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index 557af943b2f5..6aac23cc6566 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -15,6 +15,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/device.h> +#include <linux/notifier.h> #include <linux/err.h> #include <linux/power_supply.h> #include <linux/thermal.h> @@ -24,6 +25,9 @@ struct class *power_supply_class; EXPORT_SYMBOL_GPL(power_supply_class); +ATOMIC_NOTIFIER_HEAD(power_supply_notifier); +EXPORT_SYMBOL_GPL(power_supply_notifier); + static struct device_type power_supply_dev_type; static bool __power_supply_is_supplied_by(struct power_supply *supplier, @@ -80,6 +84,8 @@ static void power_supply_changed_work(struct work_struct *work) class_for_each_device(power_supply_class, NULL, psy, __power_supply_changed_work); power_supply_update_leds(psy); + atomic_notifier_call_chain(&power_supply_notifier, + PSY_EVENT_PROP_CHANGED, psy); kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE); spin_lock_irqsave(&psy->changed_lock, flags); } @@ -347,6 +353,18 @@ static void power_supply_dev_release(struct device *dev) kfree(dev); } +int power_supply_reg_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_register(&power_supply_notifier, nb); +} +EXPORT_SYMBOL_GPL(power_supply_reg_notifier); + +void power_supply_unreg_notifier(struct notifier_block *nb) +{ + atomic_notifier_chain_unregister(&power_supply_notifier, nb); +} +EXPORT_SYMBOL_GPL(power_supply_unreg_notifier); + #ifdef CONFIG_THERMAL static int power_supply_read_temp(struct thermal_zone_device *tzd, unsigned long *temp) diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index 5c2600630dc9..3e28fe188d17 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -16,6 +16,7 @@ #include <linux/workqueue.h> #include <linux/leds.h> #include <linux/spinlock.h> +#include <linux/notifier.h> struct device; @@ -158,6 +159,10 @@ enum power_supply_type { POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */ }; +enum power_supply_notifier_events { + PSY_EVENT_PROP_CHANGED, +}; + union power_supply_propval { int intval; const char *strval; @@ -235,6 +240,9 @@ struct power_supply_info { int use_for_apm; }; +extern struct atomic_notifier_head power_supply_notifier; +extern int power_supply_reg_notifier(struct notifier_block *nb); +extern void power_supply_unreg_notifier(struct notifier_block *nb); extern struct power_supply *power_supply_get_by_name(const char *name); extern void power_supply_changed(struct power_supply *psy); extern int power_supply_am_i_supplied(struct power_supply *psy); |