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authorPali Rohár <pali.rohar@gmail.com>2013-11-19 11:18:03 +0100
committerAnton Vorontsov <anton@enomsg.org>2013-12-01 14:27:24 -0800
commitd36240d26025bec95f3499e2401a56db98d9f01c (patch)
tree345c489dc983fc87cf4927235d9e2361e3e10448 /include/linux
parent93353e8088057dd988362e6cae727af43734b494 (diff)
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power_supply: Add power_supply notifier
This patch adds a notifier chain to the power_supply, this helps drivers in other subsystem to listen to changes in power supply subsystem. This would help to take some actions in those drivers on changing the power supply properties. One such scenario is to increase/decrease system performance based on the battery capacity/voltage. Another scenario is to adjust the h/w peak current detection voltage/current thresholds based on battery voltage/capacity. The notifier helps drivers to listen to changes in power_suppy susbystem without polling the power_supply properties Signed-off-by: Jenny TC <jenny.tc@intel.com> Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Acked-by: Jenny TC <jenny.tc@intel.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/power_supply.h8
1 files changed, 8 insertions, 0 deletions
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);