charger-manager: Poll battery health in normal state

Charger-Manager needs to check battery health in normal state
as well as suspend-to-RAM state. When the battery is fully charged,
Charger-Manager needs to determine when the chargers restart charging.

This patch allows Charger-Manager to monitor battery health in normal
state and handle operation for chargers after battery is fully charged.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/power/charger-manager.h b/include/linux/power/charger-manager.h
index 4f75e531c112..baa299a95e13 100644
--- a/include/linux/power/charger-manager.h
+++ b/include/linux/power/charger-manager.h
@@ -18,6 +18,8 @@
 #include <linux/power_supply.h>
 
 enum data_source {
+        CM_BATTERY_PRESENT,
+        CM_NO_BATTERY,
         CM_FUEL_GAUGE,
         CM_CHARGER_STAT,
 };
@@ -38,11 +40,18 @@ enum polling_modes {
  *      rtc_only_wakeup() returning false.
  *      If the RTC given to CM is the only wakeup reason,
  *      rtc_only_wakeup should return true.
+ * @assume_timer_stops_in_suspend:
+ *      Assume that the jiffy timer stops in suspend-to-RAM.
+ *      When enabled, CM does not rely on jiffies value in
+ *      suspend_again and assumes that jiffies value does not
+ *      change during suspend.
  */
 struct charger_global_desc {
         char *rtc_name;
 
         bool (*rtc_only_wakeup)(void);
+
+        bool assume_timer_stops_in_suspend;
 };
 
 /**
@@ -50,6 +59,11 @@ struct charger_global_desc {
  * @psy_name: the name of power-supply-class for charger manager
  * @polling_mode:
  *      Determine which polling mode will be used
+ * @fullbatt_vchkdrop_ms:
+ * @fullbatt_vchkdrop_uV:
+ *      Check voltage drop after the battery is fully charged.
+ *      If it has dropped more than fullbatt_vchkdrop_uV after
+ *      fullbatt_vchkdrop_ms, CM will restart charging.
  * @fullbatt_uV: voltage in microvolt
  *      If it is not being charged and VBATT >= fullbatt_uV,
  *      it is assumed to be full.
@@ -76,6 +90,8 @@ struct charger_desc {
         enum polling_modes polling_mode;
         unsigned int polling_interval_ms;
 
+        unsigned int fullbatt_vchkdrop_ms;
+        unsigned int fullbatt_vchkdrop_uV;
         unsigned int fullbatt_uV;
 
         enum data_source battery_present;
@@ -101,6 +117,11 @@ struct charger_desc {
  * @fuel_gauge: power_supply for fuel gauge
  * @charger_stat: array of power_supply for chargers
  * @charger_enabled: the state of charger
+ * @fullbatt_vchk_jiffies_at:
+ *      jiffies at the time full battery check will occur.
+ * @fullbatt_vchk_uV: voltage in microvolt
+ *      criteria for full battery
+ * @fullbatt_vchk_work: work queue for full battery check
  * @emergency_stop:
  *      When setting true, stop charging
  * @last_temp_mC: the measured temperature in milli-Celsius
@@ -121,6 +142,10 @@ struct charger_manager {
 
         bool charger_enabled;
 
+        unsigned long fullbatt_vchk_jiffies_at;
+        unsigned int fullbatt_vchk_uV;
+        struct delayed_work fullbatt_vchk_work;
+
         int emergency_stop;
         int last_temp_mC;