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-rw-r--r--drivers/power/charger-manager.c161
-rw-r--r--include/linux/power/charger-manager.h8
2 files changed, 123 insertions, 46 deletions
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index cdf29d2eb7a..c701f5e6f32 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -227,6 +227,58 @@ static bool is_charging(struct charger_manager *cm)
}
/**
+ * is_full_charged - Returns true if the battery is fully charged.
+ * @cm: the Charger Manager representing the battery.
+ */
+static bool is_full_charged(struct charger_manager *cm)
+{
+ struct charger_desc *desc = cm->desc;
+ union power_supply_propval val;
+ int ret = 0;
+ int uV;
+
+ /* If there is no battery, it cannot be charged */
+ if (!is_batt_present(cm)) {
+ val.intval = 0;
+ goto out;
+ }
+
+ if (cm->fuel_gauge && desc->fullbatt_full_capacity > 0) {
+ /* Not full if capacity of fuel gauge isn't full */
+ ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+ POWER_SUPPLY_PROP_CHARGE_FULL, &val);
+ if (!ret && val.intval > desc->fullbatt_full_capacity) {
+ val.intval = 1;
+ goto out;
+ }
+ }
+
+ /* Full, if it's over the fullbatt voltage */
+ if (desc->fullbatt_uV > 0) {
+ ret = get_batt_uV(cm, &uV);
+ if (!ret && uV >= desc->fullbatt_uV) {
+ val.intval = 1;
+ goto out;
+ }
+ }
+
+ /* Full, if the capacity is more than fullbatt_soc */
+ if (cm->fuel_gauge && desc->fullbatt_soc > 0) {
+ ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+ POWER_SUPPLY_PROP_CAPACITY, &val);
+ if (!ret && val.intval >= desc->fullbatt_soc) {
+ val.intval = 1;
+ goto out;
+ }
+ }
+
+ val.intval = 0;
+
+out:
+ return val.intval ? true : false;
+}
+
+/**
* is_polling_required - Return true if need to continue polling for this CM.
* @cm: the Charger Manager representing the battery.
*/
@@ -418,7 +470,7 @@ static void fullbatt_vchk(struct work_struct *work)
diff = desc->fullbatt_uV;
diff -= batt_uV;
- dev_dbg(cm->dev, "VBATT dropped %duV after full-batt.\n", diff);
+ dev_info(cm->dev, "VBATT dropped %duV after full-batt.\n", diff);
if (diff > desc->fullbatt_vchkdrop_uV) {
try_charger_restart(cm);
@@ -441,10 +493,14 @@ static bool _cm_monitor(struct charger_manager *cm)
dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
- /* It has been stopped or charging already */
- if (!!temp == !!cm->emergency_stop)
+ /* It has been stopped already */
+ if (temp && cm->emergency_stop)
return false;
+ /*
+ * Check temperature whether overheat or cold.
+ * If temperature is out of range normal state, stop charging.
+ */
if (temp) {
cm->emergency_stop = temp;
if (!try_charger_enable(cm, false)) {
@@ -453,10 +509,34 @@ static bool _cm_monitor(struct charger_manager *cm)
else
uevent_notify(cm, "COLD");
}
+
+ /*
+ * Check dropped voltage of battery. If battery voltage is more
+ * dropped than fullbatt_vchkdrop_uV after fully charged state,
+ * charger-manager have to recharge battery.
+ */
+ } else if (!cm->emergency_stop && is_ext_pwr_online(cm) &&
+ !cm->charger_enabled) {
+ fullbatt_vchk(&cm->fullbatt_vchk_work.work);
+
+ /*
+ * Check whether fully charged state to protect overcharge
+ * if charger-manager is charging for battery.
+ */
+ } else if (!cm->emergency_stop && is_full_charged(cm) &&
+ cm->charger_enabled) {
+ dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n");
+ uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]);
+
+ try_charger_enable(cm, false);
+
+ fullbatt_vchk(&cm->fullbatt_vchk_work.work);
} else {
cm->emergency_stop = 0;
- if (!try_charger_enable(cm, true))
- uevent_notify(cm, "CHARGING");
+ if (is_ext_pwr_online(cm)) {
+ if (!try_charger_enable(cm, true))
+ uevent_notify(cm, "CHARGING");
+ }
}
return true;
@@ -719,47 +799,10 @@ static int charger_get_property(struct power_supply *psy,
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
- if (cm->fuel_gauge) {
- if (cm->fuel_gauge->get_property(cm->fuel_gauge,
- POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0)
- break;
- }
-
- if (is_ext_pwr_online(cm)) {
- /* Not full if it's charging. */
- if (is_charging(cm)) {
- val->intval = 0;
- break;
- }
- /*
- * Full if it's powered but not charging andi
- * not forced stop by emergency
- */
- if (!cm->emergency_stop) {
- val->intval = 1;
- break;
- }
- }
-
- /* Full if it's over the fullbatt voltage */
- ret = get_batt_uV(cm, &uV);
- if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
- !is_charging(cm)) {
+ if (is_full_charged(cm))
val->intval = 1;
- break;
- }
-
- /* Full if the cap is 100 */
- if (cm->fuel_gauge) {
- ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
- POWER_SUPPLY_PROP_CAPACITY, val);
- if (!ret && val->intval >= 100 && !is_charging(cm)) {
- val->intval = 1;
- break;
- }
- }
-
- val->intval = 0;
+ else
+ val->intval = 0;
ret = 0;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
@@ -1049,7 +1092,26 @@ static int charger_extcon_notifier(struct notifier_block *self,
struct charger_cable *cable =
container_of(self, struct charger_cable, nb);
+ /*
+ * The newly state of charger cable.
+ * If cable is attached, cable->attached is true.
+ */
cable->attached = event;
+
+ /*
+ * Setup monitoring to check battery state
+ * when charger cable is attached.
+ */
+ if (cable->attached && is_polling_required(cable->cm)) {
+ if (work_pending(&setup_polling))
+ cancel_work_sync(&setup_polling);
+ schedule_work(&setup_polling);
+ }
+
+ /*
+ * Setup work for controlling charger(regulator)
+ * according to charger cable.
+ */
schedule_work(&cable->wq);
return NOTIFY_DONE;
@@ -1143,6 +1205,15 @@ static int charger_manager_probe(struct platform_device *pdev)
desc->fullbatt_vchkdrop_ms = 0;
desc->fullbatt_vchkdrop_uV = 0;
}
+ if (desc->fullbatt_soc == 0) {
+ dev_info(&pdev->dev, "Ignoring full-battery soc(state of"
+ " charge) threshold as it is not"
+ " supplied.");
+ }
+ if (desc->fullbatt_full_capacity == 0) {
+ dev_info(&pdev->dev, "Ignoring full-battery full capacity"
+ " threshold as it is not supplied.");
+ }
if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
ret = -EINVAL;
diff --git a/include/linux/power/charger-manager.h b/include/linux/power/charger-manager.h
index b542270affc..76b37ef3c07 100644
--- a/include/linux/power/charger-manager.h
+++ b/include/linux/power/charger-manager.h
@@ -140,7 +140,11 @@ struct charger_regulator {
* 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,
+ * If VBATT >= fullbatt_uV, it is assumed to be full.
+ * @fullbatt_soc: state of Charge in %
+ * If state of Charge >= fullbatt_soc, it is assumed to be full.
+ * @fullbatt_full_capacity: full capacity measure
+ * If full capacity of battery >= fullbatt_full_capacity,
* it is assumed to be full.
* @polling_interval_ms: interval in millisecond at which
* charger manager will monitor battery health
@@ -168,6 +172,8 @@ struct charger_desc {
unsigned int fullbatt_vchkdrop_ms;
unsigned int fullbatt_vchkdrop_uV;
unsigned int fullbatt_uV;
+ unsigned int fullbatt_soc;
+ unsigned int fullbatt_full_capacity;
enum data_source battery_present;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 05:12:02 +0000