power: max77665-charger: remove extcon support from charger driver

Remove extcon support from charger driver and register power-supply
extcon driver for the power supply update.

The charging current is now configured through the charging regulator
through regulator framework.

Change the driver initialisation sequence so that the charger driver
get initialised before usb-udc driver.

Change-Id: Ia01ae1a9240281adab28fec7062faa63c918f004
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/234257
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit

1 files changed, 11 insertions, 282 deletions

diff --git a/drivers/power/max77665-charger.c b/drivers/power/max77665-charger.c
index 5d2821e89f8e..cf1a186c7c1e 100644
--- a/drivers/power/max77665-charger.c
+++ b/drivers/power/max77665-charger.c
@@ -37,8 +37,6 @@
 #include <linux/mutex.h>
 #include <linux/delay.h>
 
-#define CHARGER_TYPE_DETECTION_DEBOUNCE_TIME_MS 500
-
 /* fast charge current in mA */
 static const uint32_t chg_cc[]  = {
 	0, 33, 66, 99, 133, 166, 199, 233, 266, 299,
@@ -75,15 +73,9 @@ struct max77665_charger {
 	enum max77665_mode mode;
 	struct device		*dev;
 	int			irq;
-	struct power_supply	ac;
-	struct power_supply	usb;
 	struct max77665_charger_plat_data *plat_data;
 	struct mutex current_limit_mutex;
 	int max_current_mA;
-	uint8_t ac_online;
-	uint8_t usb_online;
-	uint8_t num_cables;
-	struct extcon_dev *edev;
 	struct alarm wdt_alarm;
 	struct delayed_work wdt_ack_work;
 	struct delayed_work set_max_current_work;
@@ -92,11 +84,6 @@ struct max77665_charger {
 	struct max77665_regulator_info reg_info;
 };
 
-static enum power_supply_property max77665_charger_props[] = {
-	POWER_SUPPLY_PROP_ONLINE,
-	POWER_SUPPLY_PROP_CURRENT_MAX,
-};
-
 static int max77665_write_reg(struct max77665_charger *charger,
 	uint8_t reg, int value)
 {
@@ -185,59 +172,6 @@ int max77665_get_max_input_current(struct max77665_charger *charger, int *mA)
 	return ret;
 }
 
-static int max77665_charger_set_property(struct power_supply *psy,
-		enum power_supply_property psp,
-		const union power_supply_propval *val)
-{
-	struct max77665_charger *chip = container_of(psy,
-				struct max77665_charger, ac);
-
-	if (psp == POWER_SUPPLY_PROP_CURRENT_MAX)
-		/* passed value is uA */
-		return max77665_set_max_input_current(chip, val->intval / 1000);
-
-	return -EINVAL;
-}
-
-static int max77665_charger_get_property(struct power_supply *psy,
-		enum power_supply_property psp, union power_supply_propval *val)
-{
-	int online;
-	int ret;
-	struct max77665_charger *charger;
-
-	if (psy->type == POWER_SUPPLY_TYPE_MAINS) {
-		charger = container_of(psy, struct max77665_charger, ac);
-		online = charger->ac_online;
-	} else if (psy->type == POWER_SUPPLY_TYPE_USB) {
-		charger = container_of(psy, struct max77665_charger, usb);
-		online = charger->usb_online;
-	} else {
-		return -EINVAL;
-	}
-
-	ret = 0;
-	switch (psp) {
-	case POWER_SUPPLY_PROP_ONLINE:
-		val->intval = online;
-		break;
-	case POWER_SUPPLY_PROP_CURRENT_MAX:
-		ret = max77665_get_max_input_current(charger, &val->intval);
-		break;
-	default:
-		return -EINVAL;
-	}
-	return ret;
-}
-
-static int max77665_charger_property_is_writeable(struct power_supply *psy,
-						enum power_supply_property psp)
-{
-	if (psp == POWER_SUPPLY_PROP_CURRENT_MAX)
-		return 1;
-	return 0;
-}
-
 static int max77665_enable_write(struct max77665_charger *charger, bool access)
 {
 	int ret = 0;
@@ -553,85 +487,6 @@ static int max77665_charging_enable(struct max77665_charger *charger)
 	return ret;
 }
 
-static int max77665_disable_charger(struct max77665_charger *charger,
-		struct extcon_dev *edev)
-{
-	int ret;
-
-	charger->max_current_mA = 0;
-	ret  = max77665_charging_disable(charger);
-
-	charger->ac_online = 0;
-	charger->usb_online = 0;
-	power_supply_changed(&charger->usb);
-	power_supply_changed(&charger->ac);
-
-	return ret;
-}
-
-static int max77665_enable_charger(struct max77665_charger *charger,
-		struct extcon_dev *edev)
-{
-	int ret = 0;
-	int ilim;
-	enum max77665_mode mode;
-
-	charger->usb_online = 0;
-	charger->ac_online = 0;
-
-	if (charger->plat_data->update_status)
-		charger->plat_data->update_status(0);
-
-	mode = CHARGER;
-	if (true == extcon_get_cable_state(edev, "USB-Host")) {
-		mode = OTG;
-		charger->max_current_mA = 0;
-	} else if (true == extcon_get_cable_state(edev, "USB")) {
-		charger->usb_online = 1;
-		charger->max_current_mA = 500;
-	} else if (true == extcon_get_cable_state(edev, "Charge-downstream")) {
-		charger->usb_online = 1;
-		charger->max_current_mA = 1500;
-	} else if (true == extcon_get_cable_state(edev, "TA")) {
-		charger->ac_online = 1;
-		charger->max_current_mA = 2000;
-	} else if (true == extcon_get_cable_state(edev, "Fast-charger")) {
-		charger->ac_online = 1;
-		charger->max_current_mA = 2200;
-	} else if (true == extcon_get_cable_state(edev, "Slow-charger")) {
-		charger->ac_online = 1;
-		charger->max_current_mA = 500;
-	} else {
-		/* no cable connected */
-		goto done;
-	}
-
-	ret = max77665_set_charger_mode(charger, mode);
-	if (ret < 0) {
-		dev_err(charger->dev, "failed to set device to charger mode\n");
-		goto done;
-	}
-
-	/* set the charging watchdog timer */
-	alarm_start(&charger->wdt_alarm, ktime_add(ktime_get_boottime(),
-			ktime_set(MAX77665_WATCHDOG_TIMER_PERIOD_S / 2, 0)));
-
-	if (charger->plat_data->update_status) {
-		ret = max77665_get_max_input_current(charger, &ilim);
-		if (0 > ret)
-			goto done;
-		charger->plat_data->update_status(ilim);
-	}
-
-done:
-	if (charger->usb_online)
-		power_supply_changed(&charger->usb);
-	if (charger->ac_online)
-		power_supply_changed(&charger->ac);
-
-	return ret;
-}
-
 static int max77665_set_charging_current(struct regulator_dev *rdev,
 		int min_uA, int max_uA)
 {
@@ -732,56 +587,6 @@ static int max77665_charger_regulator_init(
 	return 0;
 }
 
-static void charger_extcon_handle_notifier(struct work_struct *w)
-{
-	struct max77665_charger_cable *cable = container_of(to_delayed_work(w),
-			struct max77665_charger_cable, extcon_notifier_work);
-	struct max77665_charger *charger = cable->charger;
-	int val;
-
-	mutex_lock(&charger->current_limit_mutex);
-	if (0 > max77665_read_reg(cable->charger, MAX77665_CHG_DTLS_01, &val))
-		goto error;
-
-	dev_dbg(charger->dev, "cable is %s, charging is %s\n",
-			cable->event ? "attached" : "disconnected",
-			charging_is_on(val) ? "on" : "off");
-	/*
-	 * For high current charging, max77665 might cut off the VBUS_SAFE_OUT
-	 * to AP if input voltage is below VCHIN_UVLO (in voltage regulation
-	 * mode). If that happens, the charging might is still on when AP
-	 * send cable unplugged event. We need check this conditon by reading
-	 * the CHG_DTLS_01 register.
-	 */
-	if (cable->event == 0 && !charging_is_on(val))
-		max77665_disable_charger(charger, cable->extcon_dev->edev);
-	else if (cable->event == 1 && !charging_is_on(val))
-		max77665_enable_charger(charger, cable->extcon_dev->edev);
-
-error:
-	mutex_unlock(&charger->current_limit_mutex);
-
-}
-
-static int max77665_reset_charger(struct max77665_charger *charger,
-		struct extcon_dev *edev)
-{
-	int ret;
-
-	mutex_lock(&charger->current_limit_mutex);
-
-	ret = max77665_disable_charger(charger, charger->edev);
-	if (ret < 0)
-		goto error;
-
-	ret = max77665_enable_charger(charger, charger->edev);
-	if (ret < 0)
-		goto error;
-error:
-	mutex_unlock(&charger->current_limit_mutex);
-	return 0;
-}
-
 static void max77665_charger_wdt_ack_work_handler(struct work_struct *w)
 {
 	struct max77665_charger *charger = container_of(to_delayed_work(w),
@@ -806,20 +611,6 @@ static enum alarmtimer_restart max77665_charger_wdt_timer(struct alarm *alarm,
 	return ALARMTIMER_NORESTART;
 }
 
-static int charger_extcon_notifier(struct notifier_block *self,
-		unsigned long event, void *ptr)
-{
-	struct max77665_charger_cable *cable = container_of(self,
-		struct max77665_charger_cable, nb);
-
-	cable->event = event;
-	cancel_delayed_work(&cable->extcon_notifier_work);
-	schedule_delayed_work(&cable->extcon_notifier_work,
-		msecs_to_jiffies(CHARGER_TYPE_DETECTION_DEBOUNCE_TIME_MS));
-
-	return NOTIFY_DONE;
-}
-
 static int max77665_update_charger_status(struct max77665_charger *charger)
 {
 	int ret;
@@ -1011,7 +802,6 @@ static void max77665_remove_sysfs_entry(struct device *dev)
 static __devinit int max77665_battery_probe(struct platform_device *pdev)
 {
 	int ret = 0;
-	uint8_t j;
 	struct max77665_charger *charger;
 
 	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
@@ -1041,67 +831,13 @@ static __devinit int max77665_battery_probe(struct platform_device *pdev)
 		/* modify OTP setting of input current limit to 100ma */
 		ret = max77665_set_max_input_current(charger, 100);
 		if (ret < 0)
-			goto remove_charging;
-
-		dev_info(&pdev->dev, "Initializing battery charger code\n");
-
-		charger->ac.name		= "ac";
-		charger->ac.type		= POWER_SUPPLY_TYPE_MAINS;
-		charger->ac.get_property	= max77665_charger_get_property;
-		charger->ac.set_property	= max77665_charger_set_property;
-		charger->ac.properties		= max77665_charger_props;
-		charger->ac.num_properties = ARRAY_SIZE(max77665_charger_props);
-		charger->ac.property_is_writeable =
-			max77665_charger_property_is_writeable;
-		ret = power_supply_register(charger->dev, &charger->ac);
-		if (ret) {
-			dev_err(charger->dev, "failed: power supply register\n");
-			return ret;
-		}
-
-		charger->usb = charger->ac;
-		charger->usb.name		= "usb";
-		charger->usb.type		= POWER_SUPPLY_TYPE_USB;
-		ret = power_supply_register(charger->dev, &charger->usb);
-		if (ret) {
-			dev_err(charger->dev, "failed: power supply register\n");
-			goto pwr_sply_error;
-		}
-
-		for (j = 0 ; j < charger->plat_data->num_cables; j++) {
-			struct max77665_charger_cable *cable =
-				&charger->plat_data->cables[j];
-			cable->extcon_dev =  devm_kzalloc(&pdev->dev,
-					sizeof(struct extcon_specific_cable_nb),
-								GFP_KERNEL);
-			if (!cable->extcon_dev) {
-				dev_err(&pdev->dev, "failed to allocate memory for extcon dev\n");
-				goto chrg_error;
-			}
-
-			INIT_DELAYED_WORK(&cable->extcon_notifier_work,
-					charger_extcon_handle_notifier);
-
-			cable->charger = charger;
-			cable->nb.notifier_call = charger_extcon_notifier;
-
-			ret = extcon_register_interest(cable->extcon_dev,
-					charger->plat_data->extcon_name,
-					cable->name, &cable->nb);
-			if (ret < 0)
-				dev_err(charger->dev, "Cannot register for cable: %s\n",
-						cable->name);
-		}
-
-		charger->edev = extcon_get_extcon_dev(charger->plat_data->extcon_name);
-		if (!charger->edev)
-			goto chrg_error;
+			goto free_lock;
 
 		ret = max77665_charger_regulator_init(charger,
 							charger->plat_data);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "Charger regulator init failed\n");
-			goto chrg_error;
+			goto free_lock;
 		}
 	}
 
@@ -1140,10 +876,11 @@ static __devinit int max77665_battery_probe(struct platform_device *pdev)
 	}
 
 	if (charger->plat_data->is_battery_present) {
-		/* reset the charging in case cable is already inserted */
-		ret = max77665_reset_charger(charger, charger->edev);
-		if (ret < 0)
+		ret = max77665_charging_disable(charger);
+		if (ret < 0) {
+			dev_err(charger->dev, "Disable charging failed\n");
 			goto remove_sysfs;
+		}
 	}
 
 	dev_info(&pdev->dev, "%s() get success\n", __func__);
@@ -1156,16 +893,10 @@ free_irq:
 reg_err:
 	if (charger->plat_data->is_battery_present)
 		regulator_unregister(charger->reg_info.rdev);
-chrg_error:
-	if (charger->plat_data->is_battery_present)
-		power_supply_unregister(&charger->usb);
-pwr_sply_error:
+free_lock:
 	if (charger->plat_data->is_battery_present)
-		power_supply_unregister(&charger->ac);
-remove_charging:
+		wake_lock_destroy(&charger->wdt_wake_lock);
 	mutex_destroy(&charger->current_limit_mutex);
-if (charger->plat_data->is_battery_present)
-	wake_lock_destroy(&charger->wdt_wake_lock);
 	return ret;
 }
 
@@ -1178,10 +909,8 @@ static int __devexit max77665_battery_remove(struct platform_device *pdev)
 	max77665_remove_sysfs_entry(&pdev->dev);
 	free_irq(charger->irq, charger);
 	if (charger->plat_data->is_battery_present)
-		power_supply_unregister(&charger->ac);
-	if (charger->plat_data->is_battery_present)
-		power_supply_unregister(&charger->usb);
-
+		wake_lock_destroy(&charger->wdt_wake_lock);
+	mutex_destroy(&charger->current_limit_mutex);
 	return 0;
 }
 #ifdef CONFIG_PM_SLEEP
@@ -1230,7 +959,7 @@ static void __exit max77665_battery_exit(void)
 	platform_driver_unregister(&max77665_battery_driver);
 }
 
-late_initcall(max77665_battery_init);
+subsys_initcall_sync(max77665_battery_init);
 module_exit(max77665_battery_exit);
 
 MODULE_DESCRIPTION("MAXIM MAX77665 battery charging driver");