power: supply: charger-manager: Remove cm_notify_event function

cm_notify_event() was introduced to get an event associated with the
battery status externally (ie in board files), but no one ever used it.
Moreover it makes charger manager driver more complicated. Drop the
function and all data related to it to simplify the driver.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

1 files changed, 10 insertions, 173 deletions

diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index 1adaeefd90a4..c18dc8d3ae1c 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -434,25 +434,18 @@ static int try_charger_restart(struct charger_manager *cm)
 
 /**
  * fullbatt_vchk - Check voltage drop some times after "FULL" event.
- * @work: the work_struct appointing the function
  *
- * If a user has designated "fullbatt_vchkdrop_ms/uV" values with
+ * If a user has designated "fullbatt_vchkdrop_uV" values with
  * charger_desc, Charger Manager checks voltage drop after the battery
  * "FULL" event. It checks whether the voltage has dropped more than
  * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms.
  */
-static void fullbatt_vchk(struct work_struct *work)
+static void fullbatt_vchk(struct charger_manager *cm)
 {
-	struct delayed_work *dwork = to_delayed_work(work);
-	struct charger_manager *cm = container_of(dwork,
-			struct charger_manager, fullbatt_vchk_work);
 	struct charger_desc *desc = cm->desc;
 	int batt_uV, err, diff;
 
-	/* remove the appointment for fullbatt_vchk */
-	cm->fullbatt_vchk_jiffies_at = 0;
-
-	if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
+	if (!desc->fullbatt_vchkdrop_uV)
 		return;
 
 	err = get_batt_uV(cm, &batt_uV);
@@ -588,9 +581,11 @@ static int cm_check_thermal_status(struct charger_manager *cm)
 	}
 
 	if (temp > upper_limit)
-		ret = CM_EVENT_BATT_OVERHEAT;
+		ret = CM_BATT_OVERHEAT;
 	else if (temp < lower_limit)
-		ret = CM_EVENT_BATT_COLD;
+		ret = CM_BATT_COLD;
+	else
+		ret = CM_BATT_OK;
 
 	return ret;
 }
@@ -635,7 +630,7 @@ static bool _cm_monitor(struct charger_manager *cm)
 	 */
 	} else if (!cm->emergency_stop && is_ext_pwr_online(cm) &&
 			!cm->charger_enabled) {
-		fullbatt_vchk(&cm->fullbatt_vchk_work.work);
+		fullbatt_vchk(cm);
 
 	/*
 	 * Check whether fully charged state to protect overcharge
@@ -648,7 +643,7 @@ static bool _cm_monitor(struct charger_manager *cm)
 
 		try_charger_enable(cm, false);
 
-		fullbatt_vchk(&cm->fullbatt_vchk_work.work);
+		fullbatt_vchk(cm);
 	} else {
 		cm->emergency_stop = 0;
 		if (is_ext_pwr_online(cm)) {
@@ -750,66 +745,6 @@ static void cm_monitor_poller(struct work_struct *work)
 	schedule_work(&setup_polling);
 }
 
-/**
- * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL
- * @cm: the Charger Manager representing the battery.
- */
-static void fullbatt_handler(struct charger_manager *cm)
-{
-	struct charger_desc *desc = cm->desc;
-
-	if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
-		goto out;
-
-	if (cm_suspended)
-		device_set_wakeup_capable(cm->dev, true);
-
-	mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
-			 msecs_to_jiffies(desc->fullbatt_vchkdrop_ms));
-	cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies(
-				       desc->fullbatt_vchkdrop_ms);
-
-	if (cm->fullbatt_vchk_jiffies_at == 0)
-		cm->fullbatt_vchk_jiffies_at = 1;
-
-out:
-	dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
-	power_supply_changed(cm->charger_psy);
-}
-
-/**
- * battout_handler - Event handler for CM_EVENT_BATT_OUT
- * @cm: the Charger Manager representing the battery.
- */
-static void battout_handler(struct charger_manager *cm)
-{
-	if (cm_suspended)
-		device_set_wakeup_capable(cm->dev, true);
-
-	if (!is_batt_present(cm)) {
-		dev_emerg(cm->dev, "Battery Pulled Out!\n");
-		power_supply_changed(cm->charger_psy);
-	} else {
-		power_supply_changed(cm->charger_psy);
-	}
-}
-
-/**
- * misc_event_handler - Handler for other events
- * @cm: the Charger Manager representing the battery.
- * @type: the Charger Manager representing the battery.
- */
-static void misc_event_handler(struct charger_manager *cm,
-			enum cm_event_types type)
-{
-	if (cm_suspended)
-		device_set_wakeup_capable(cm->dev, true);
-
-	if (is_polling_required(cm) && cm->desc->polling_interval_ms)
-		schedule_work(&setup_polling);
-	power_supply_changed(cm->charger_psy);
-}
-
 static int charger_get_property(struct power_supply *psy,
 		enum power_supply_property psp,
 		union power_supply_propval *val)
@@ -1000,21 +935,6 @@ static bool cm_setup_timer(void)
 
 	mutex_lock(&cm_list_mtx);
 	list_for_each_entry(cm, &cm_list, entry) {
-		unsigned int fbchk_ms = 0;
-
-		/* fullbatt_vchk is required. setup timer for that */
-		if (cm->fullbatt_vchk_jiffies_at) {
-			fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at
-						    - jiffies);
-			if (time_is_before_eq_jiffies(
-				cm->fullbatt_vchk_jiffies_at) ||
-				msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) {
-				fullbatt_vchk(&cm->fullbatt_vchk_work.work);
-				fbchk_ms = 0;
-			}
-		}
-		CM_MIN_VALID(wakeup_ms, fbchk_ms);
-
 		/* Skip if polling is not required for this CM */
 		if (!is_polling_required(cm) && !cm->emergency_stop)
 			continue;
@@ -1422,8 +1342,6 @@ static struct charger_desc *of_cm_parse_desc(struct device *dev)
 	of_property_read_u32(np, "cm-poll-interval",
 				&desc->polling_interval_ms);
 
-	of_property_read_u32(np, "cm-fullbatt-vchkdrop-ms",
-					&desc->fullbatt_vchkdrop_ms);
 	of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt",
 					&desc->fullbatt_vchkdrop_uV);
 	of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV);
@@ -1585,9 +1503,8 @@ static int charger_manager_probe(struct platform_device *pdev)
 	if (desc->fullbatt_uV == 0) {
 		dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n");
 	}
-	if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) {
+	if (!desc->fullbatt_vchkdrop_uV) {
 		dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n");
-		desc->fullbatt_vchkdrop_ms = 0;
 		desc->fullbatt_vchkdrop_uV = 0;
 	}
 	if (desc->fullbatt_soc == 0) {
@@ -1693,8 +1610,6 @@ static int charger_manager_probe(struct platform_device *pdev)
 	cm->charger_psy_desc.properties = properties;
 	cm->charger_psy_desc.num_properties = num_properties;
 
-	INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
-
 	/* Register sysfs entry for charger(regulator) */
 	ret = charger_manager_prepare_sysfs(cm);
 	if (ret < 0) {
@@ -1834,8 +1749,6 @@ static bool cm_need_to_awake(void)
 
 static int cm_suspend_prepare(struct device *dev)
 {
-	struct charger_manager *cm = dev_get_drvdata(dev);
-
 	if (cm_need_to_awake())
 		return -EBUSY;
 
@@ -1847,7 +1760,6 @@ static int cm_suspend_prepare(struct device *dev)
 	if (cm_timer_set) {
 		cancel_work_sync(&setup_polling);
 		cancel_delayed_work_sync(&cm_monitor_work);
-		cancel_delayed_work(&cm->fullbatt_vchk_work);
 	}
 
 	return 0;
@@ -1872,31 +1784,6 @@ static void cm_suspend_complete(struct device *dev)
 
 	_cm_monitor(cm);
 
-	/* Re-enqueue delayed work (fullbatt_vchk_work) */
-	if (cm->fullbatt_vchk_jiffies_at) {
-		unsigned long delay = 0;
-		unsigned long now = jiffies + CM_JIFFIES_SMALL;
-
-		if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) {
-			delay = (unsigned long)((long)now
-				- (long)(cm->fullbatt_vchk_jiffies_at));
-			delay = jiffies_to_msecs(delay);
-		} else {
-			delay = 0;
-		}
-
-		/*
-		 * Account for cm_suspend_duration_ms with assuming that
-		 * timer stops in suspend.
-		 */
-		if (delay > cm_suspend_duration_ms)
-			delay -= cm_suspend_duration_ms;
-		else
-			delay = 0;
-
-		queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
-				   msecs_to_jiffies(delay));
-	}
 	device_set_wakeup_capable(cm->dev, false);
 }
 
@@ -1938,56 +1825,6 @@ static void __exit charger_manager_cleanup(void)
 }
 module_exit(charger_manager_cleanup);
 
-/**
- * cm_notify_event - charger driver notify Charger Manager of charger event
- * @psy: pointer to instance of charger's power_supply
- * @type: type of charger event
- * @msg: optional message passed to uevent_notify function
- */
-void cm_notify_event(struct power_supply *psy, enum cm_event_types type,
-		     char *msg)
-{
-	struct charger_manager *cm;
-	bool found_power_supply = false;
-
-	if (psy == NULL)
-		return;
-
-	mutex_lock(&cm_list_mtx);
-	list_for_each_entry(cm, &cm_list, entry) {
-		if (match_string(cm->desc->psy_charger_stat, -1,
-				 psy->desc->name) >= 0) {
-			found_power_supply = true;
-			break;
-		}
-	}
-	mutex_unlock(&cm_list_mtx);
-
-	if (!found_power_supply)
-		return;
-
-	switch (type) {
-	case CM_EVENT_BATT_FULL:
-		fullbatt_handler(cm);
-		break;
-	case CM_EVENT_BATT_OUT:
-		battout_handler(cm);
-		break;
-	case CM_EVENT_BATT_IN:
-	case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP:
-		misc_event_handler(cm, type);
-		break;
-	case CM_EVENT_UNKNOWN:
-	case CM_EVENT_OTHERS:
-		power_supply_changed(cm->charger_psy);
-		break;
-	default:
-		dev_err(cm->dev, "%s: type not specified\n", __func__);
-		break;
-	}
-}
-EXPORT_SYMBOL_GPL(cm_notify_event);
-
 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
 MODULE_DESCRIPTION("Charger Manager");
 MODULE_LICENSE("GPL");