Merge tag 'for-v3.6' of git://git.infradead.org/battery-2.6

Pull battery updates from Anton Vorontsov:
 "The tag contains just a few battery-related changes for v3.6.  It's is
  all pretty straightforward, except one thing.

  One of our patches added thermal support for power supply class, but
  thermal/ subsystem changed under our feet.  We (well, Stephen, that
  is) caught the issue and it was decided[1] that I'd just delay the
  battery pull request, and then will fix it up by merging upstream back
  into battery tree at the specific commit.

  That's not all though: another[2] small fixup for thermal subsystem
  was needed to get rid of a warning in power supply subsystem (the
  warning was not drivers/power's "fault", the thermal registration
  function just needed a proper const annotation, which is also done by
  a small commit on top of the merge.

  So, to sum this up:
   - The 'master' branch of the battery tree was in the -next tree for
     weeks, was never rebased, altered etc.  It should be all OK;
   - Although, for-v3.6 tag contains the 'master' branch + merge + the
     warning fix.

  [1] http://lkml.org/lkml/2012/6/19/23
  [2] http://lkml.org/lkml/2012/6/18/28"

* tag 'for-v3.6' of git://git.infradead.org/battery-2.6: (23 commits)
  thermal: Constify 'type' argument for the registration routine
  olpc-battery: update CHARGE_FULL_DESIGN property for BYD LiFe batteries
  olpc-battery: Add VOLTAGE_MAX_DESIGN property
  charger-manager: Fix build break related to EXTCON
  lp8727_charger: Move header file into platform_data directory
  power_supply: Add min/max alert properties for CAPACITY, TEMP, TEMP_AMBIENT
  bq27x00_battery: Add support for BQ27425 chip
  charger-manager: Set current limit of regulator for over current protection
  charger-manager: Use EXTCON Subsystem to detect charger cables for charging
  test_power: Add VOLTAGE_NOW and BATTERY_TEMP properties
  test_power: Add support for USB AC source
  gpio-charger: Use cansleep version of gpio_set_value
  bq27x00_battery: Add support for power average and health properties
  sbs-battery: Don't trigger false supply_changed event
  twl4030_charger: Allow charger to control the regulator that feeds it
  twl4030_charger: Add backup-battery charging
  twl4030_charger: Fix some typos
  max17042_battery: Support CHARGE_COUNTER power supply attribute
  smb347-charger: Add constant charge and current properties
  power_supply: Add constant charge_current and charge_voltage properties
  ...

15 files changed, 691 insertions, 50 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index aa764ecc4e60..c1892f321c46 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -268,6 +268,7 @@ config CHARGER_GPIO
 config CHARGER_MANAGER
 	bool "Battery charger manager for multiple chargers"
 	depends on REGULATOR && RTC_CLASS
+	select EXTCON
 	help
           Say Y to enable charger-manager support, which allows multiple
           chargers attached to a battery and multiple batteries attached to a
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index f5d6d379f2fb..181ddece5181 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -22,6 +22,7 @@
  * Datasheets:
  * http://focus.ti.com/docs/prod/folders/print/bq27000.html
  * http://focus.ti.com/docs/prod/folders/print/bq27500.html
+ * http://www.ti.com/product/bq27425-g1
  */
 
 #include <linux/module.h>
@@ -51,6 +52,7 @@
 #define BQ27x00_REG_LMD			0x12 /* Last measured discharge */
 #define BQ27x00_REG_CYCT		0x2A /* Cycle count total */
 #define BQ27x00_REG_AE			0x22 /* Available energy */
+#define BQ27x00_POWER_AVG		0x24
 
 #define BQ27000_REG_RSOC		0x0B /* Relative State-of-Charge */
 #define BQ27000_REG_ILMD		0x76 /* Initial last measured discharge */
@@ -66,15 +68,21 @@
 #define BQ27500_FLAG_SOCF		BIT(1) /* State-of-Charge threshold final */
 #define BQ27500_FLAG_SOC1		BIT(2) /* State-of-Charge threshold 1 */
 #define BQ27500_FLAG_FC			BIT(9)
+#define BQ27500_FLAG_OTC		BIT(15)
+
+/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
+#define BQ27425_REG_OFFSET		0x04
+#define BQ27425_REG_SOC			0x18 /* Register address plus offset */
 
 #define BQ27000_RS			20 /* Resistor sense */
+#define BQ27x00_POWER_CONSTANT		(256 * 29200 / 1000)
 
 struct bq27x00_device_info;
 struct bq27x00_access_methods {
 	int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
 };
 
-enum bq27x00_chip { BQ27000, BQ27500 };
+enum bq27x00_chip { BQ27000, BQ27500, BQ27425};
 
 struct bq27x00_reg_cache {
 	int temperature;
@@ -86,6 +94,8 @@ struct bq27x00_reg_cache {
 	int capacity;
 	int energy;
 	int flags;
+	int power_avg;
+	int health;
 };
 
 struct bq27x00_device_info {
@@ -123,6 +133,22 @@ static enum power_supply_property bq27x00_battery_props[] = {
 	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 	POWER_SUPPLY_PROP_CYCLE_COUNT,
 	POWER_SUPPLY_PROP_ENERGY_NOW,
+	POWER_SUPPLY_PROP_POWER_AVG,
+	POWER_SUPPLY_PROP_HEALTH,
+};
+
+static enum power_supply_property bq27425_battery_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_CHARGE_FULL,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 };
 
 static unsigned int poll_interval = 360;
@@ -137,10 +163,24 @@ MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \
 static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
 		bool single)
 {
+	if (di->chip == BQ27425)
+		return di->bus.read(di, reg - BQ27425_REG_OFFSET, single);
 	return di->bus.read(di, reg, single);
 }
 
 /*
+ * Higher versions of the chip like BQ27425 and BQ27500
+ * differ from BQ27000 and BQ27200 in calculation of certain
+ * parameters. Hence we need to check for the chip type.
+ */
+static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di)
+{
+	if (di->chip == BQ27425 || di->chip == BQ27500)
+		return true;
+	return false;
+}
+
+/*
  * Return the battery Relative State-of-Charge
  * Or < 0 if something fails.
  */
@@ -150,6 +190,8 @@ static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
 
 	if (di->chip == BQ27500)
 		rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
+	else if (di->chip == BQ27425)
+		rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
 	else
 		rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true);
 
@@ -174,7 +216,7 @@ static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg)
 		return charge;
 	}
 
-	if (di->chip == BQ27500)
+	if (bq27xxx_is_chip_version_higher(di))
 		charge *= 1000;
 	else
 		charge = charge * 3570 / BQ27000_RS;
@@ -208,7 +250,7 @@ static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
 {
 	int ilmd;
 
-	if (di->chip == BQ27500)
+	if (bq27xxx_is_chip_version_higher(di))
 		ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);
 	else
 		ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);
@@ -218,7 +260,7 @@ static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
 		return ilmd;
 	}
 
-	if (di->chip == BQ27500)
+	if (bq27xxx_is_chip_version_higher(di))
 		ilmd *= 1000;
 	else
 		ilmd = ilmd * 256 * 3570 / BQ27000_RS;
@@ -262,7 +304,7 @@ static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
 		return temp;
 	}
 
-	if (di->chip == BQ27500)
+	if (bq27xxx_is_chip_version_higher(di))
 		temp -= 2731;
 	else
 		temp = ((temp * 5) - 5463) / 2;
@@ -306,14 +348,70 @@ static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg)
 	return tval * 60;
 }
 
+/*
+ * Read a power avg register.
+ * Return < 0 if something fails.
+ */
+static int bq27x00_battery_read_pwr_avg(struct bq27x00_device_info *di, u8 reg)
+{
+	int tval;
+
+	tval = bq27x00_read(di, reg, false);
+	if (tval < 0) {
+		dev_err(di->dev, "error reading power avg rgister  %02x: %d\n",
+			reg, tval);
+		return tval;
+	}
+
+	if (di->chip == BQ27500)
+		return tval;
+	else
+		return (tval * BQ27x00_POWER_CONSTANT) / BQ27000_RS;
+}
+
+/*
+ * Read flag register.
+ * Return < 0 if something fails.
+ */
+static int bq27x00_battery_read_health(struct bq27x00_device_info *di)
+{
+	int tval;
+
+	tval = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
+	if (tval < 0) {
+		dev_err(di->dev, "error reading flag register:%d\n", tval);
+		return tval;
+	}
+
+	if ((di->chip == BQ27500)) {
+		if (tval & BQ27500_FLAG_SOCF)
+			tval = POWER_SUPPLY_HEALTH_DEAD;
+		else if (tval & BQ27500_FLAG_OTC)
+			tval = POWER_SUPPLY_HEALTH_OVERHEAT;
+		else
+			tval = POWER_SUPPLY_HEALTH_GOOD;
+		return tval;
+	} else {
+		if (tval & BQ27000_FLAG_EDV1)
+			tval = POWER_SUPPLY_HEALTH_DEAD;
+		else
+			tval = POWER_SUPPLY_HEALTH_GOOD;
+		return tval;
+	}
+
+	return -1;
+}
+
 static void bq27x00_update(struct bq27x00_device_info *di)
 {
 	struct bq27x00_reg_cache cache = {0, };
 	bool is_bq27500 = di->chip == BQ27500;
+	bool is_bq27425 = di->chip == BQ27425;
 
 	cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500);
 	if (cache.flags >= 0) {
-		if (!is_bq27500 && (cache.flags & BQ27000_FLAG_CI)) {
+		if (!is_bq27500 && !is_bq27425
+				&& (cache.flags & BQ27000_FLAG_CI)) {
 			dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n");
 			cache.capacity = -ENODATA;
 			cache.energy = -ENODATA;
@@ -321,16 +419,30 @@ static void bq27x00_update(struct bq27x00_device_info *di)
 			cache.time_to_empty_avg = -ENODATA;
 			cache.time_to_full = -ENODATA;
 			cache.charge_full = -ENODATA;
+			cache.health = -ENODATA;
 		} else {
 			cache.capacity = bq27x00_battery_read_rsoc(di);
-			cache.energy = bq27x00_battery_read_energy(di);
-			cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE);
-			cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP);
-			cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF);
+			if (!is_bq27425) {
+				cache.energy = bq27x00_battery_read_energy(di);
+				cache.time_to_empty =
+					bq27x00_battery_read_time(di,
+							BQ27x00_REG_TTE);
+				cache.time_to_empty_avg =
+					bq27x00_battery_read_time(di,
+							BQ27x00_REG_TTECP);
+				cache.time_to_full =
+					bq27x00_battery_read_time(di,
+							BQ27x00_REG_TTF);
+			}
 			cache.charge_full = bq27x00_battery_read_lmd(di);
+			cache.health = bq27x00_battery_read_health(di);
 		}
 		cache.temperature = bq27x00_battery_read_temperature(di);
+		if (!is_bq27425)
+			cache.cycle_count = bq27x00_battery_read_cyct(di);
 		cache.cycle_count = bq27x00_battery_read_cyct(di);
+		cache.power_avg =
+			bq27x00_battery_read_pwr_avg(di, BQ27x00_POWER_AVG);
 
 		/* We only have to read charge design full once */
 		if (di->charge_design_full <= 0)
@@ -376,7 +488,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di,
 		return curr;
 	}
 
-	if (di->chip == BQ27500) {
+	if (bq27xxx_is_chip_version_higher(di)) {
 		/* bq27500 returns signed value */
 		val->intval = (int)((s16)curr) * 1000;
 	} else {
@@ -397,7 +509,7 @@ static int bq27x00_battery_status(struct bq27x00_device_info *di,
 {
 	int status;
 
-	if (di->chip == BQ27500) {
+	if (bq27xxx_is_chip_version_higher(di)) {
 		if (di->cache.flags & BQ27500_FLAG_FC)
 			status = POWER_SUPPLY_STATUS_FULL;
 		else if (di->cache.flags & BQ27500_FLAG_DSC)
@@ -425,7 +537,7 @@ static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di,
 {
 	int level;
 
-	if (di->chip == BQ27500) {
+	if (bq27xxx_is_chip_version_higher(di)) {
 		if (di->cache.flags & BQ27500_FLAG_FC)
 			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
 		else if (di->cache.flags & BQ27500_FLAG_SOC1)
@@ -550,6 +662,12 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_ENERGY_NOW:
 		ret = bq27x00_simple_value(di->cache.energy, val);
 		break;
+	case POWER_SUPPLY_PROP_POWER_AVG:
+		ret = bq27x00_simple_value(di->cache.power_avg, val);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		ret = bq27x00_simple_value(di->cache.health, val);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -570,8 +688,14 @@ static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
 	int ret;
 
 	di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
-	di->bat.properties = bq27x00_battery_props;
-	di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
+	di->chip = BQ27425;
+	if (di->chip == BQ27425) {
+		di->bat.properties = bq27425_battery_props;
+		di->bat.num_properties = ARRAY_SIZE(bq27425_battery_props);
+	} else {
+		di->bat.properties = bq27x00_battery_props;
+		di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
+	}
 	di->bat.get_property = bq27x00_battery_get_property;
 	di->bat.external_power_changed = bq27x00_external_power_changed;
 
@@ -729,6 +853,7 @@ static int bq27x00_battery_remove(struct i2c_client *client)
 static const struct i2c_device_id bq27x00_id[] = {
 	{ "bq27200", BQ27000 },	/* bq27200 is same as bq27000, but with i2c */
 	{ "bq27500", BQ27500 },
+	{ "bq27425", BQ27425 },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, bq27x00_id);
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index 86935ec18954..526e5c931294 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -271,16 +271,13 @@ static int try_charger_enable(struct charger_manager *cm, bool enable)
 	if (enable) {
 		if (cm->emergency_stop)
 			return -EAGAIN;
-		err = regulator_bulk_enable(desc->num_charger_regulators,
-					desc->charger_regulators);
+		for (i = 0 ; i < desc->num_charger_regulators ; i++)
+			regulator_enable(desc->charger_regulators[i].consumer);
 	} else {
 		/*
 		 * Abnormal battery state - Stop charging forcibly,
 		 * even if charger was enabled at the other places
 		 */
-		err = regulator_bulk_disable(desc->num_charger_regulators,
-					desc->charger_regulators);
-
 		for (i = 0; i < desc->num_charger_regulators; i++) {
 			if (regulator_is_enabled(
 				    desc->charger_regulators[i].consumer)) {
@@ -288,7 +285,7 @@ static int try_charger_enable(struct charger_manager *cm, bool enable)
 					desc->charger_regulators[i].consumer);
 				dev_warn(cm->dev,
 					"Disable regulator(%s) forcibly.\n",
-					desc->charger_regulators[i].supply);
+					desc->charger_regulators[i].regulator_name);
 			}
 		}
 	}
@@ -994,11 +991,92 @@ int setup_charger_manager(struct charger_global_desc *gd)
 }
 EXPORT_SYMBOL_GPL(setup_charger_manager);
 
+/**
+ * charger_extcon_work - enable/diable charger according to the state
+ *			of charger cable
+ *
+ * @work: work_struct of the function charger_extcon_work.
+ */
+static void charger_extcon_work(struct work_struct *work)
+{
+	struct charger_cable *cable =
+			container_of(work, struct charger_cable, wq);
+	int ret;
+
+	if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) {
+		ret = regulator_set_current_limit(cable->charger->consumer,
+					cable->min_uA, cable->max_uA);
+		if (ret < 0) {
+			pr_err("Cannot set current limit of %s (%s)\n",
+				cable->charger->regulator_name, cable->name);
+			return;
+		}
+
+		pr_info("Set current limit of %s : %duA ~ %duA\n",
+					cable->charger->regulator_name,
+					cable->min_uA, cable->max_uA);
+	}
+
+	try_charger_enable(cable->cm, cable->attached);
+}
+
+/**
+ * charger_extcon_notifier - receive the state of charger cable
+ *			when registered cable is attached or detached.
+ *
+ * @self: the notifier block of the charger_extcon_notifier.
+ * @event: the cable state.
+ * @ptr: the data pointer of notifier block.
+ */
+static int charger_extcon_notifier(struct notifier_block *self,
+			unsigned long event, void *ptr)
+{
+	struct charger_cable *cable =
+		container_of(self, struct charger_cable, nb);
+
+	cable->attached = event;
+	schedule_work(&cable->wq);
+
+	return NOTIFY_DONE;
+}
+
+/**
+ * charger_extcon_init - register external connector to use it
+ *			as the charger cable
+ *
+ * @cm: the Charger Manager representing the battery.
+ * @cable: the Charger cable representing the external connector.
+ */
+static int charger_extcon_init(struct charger_manager *cm,
+		struct charger_cable *cable)
+{
+	int ret = 0;
+
+	/*
+	 * Charger manager use Extcon framework to identify
+	 * the charger cable among various external connector
+	 * cable (e.g., TA, USB, MHL, Dock).
+	 */
+	INIT_WORK(&cable->wq, charger_extcon_work);
+	cable->nb.notifier_call = charger_extcon_notifier;
+	ret = extcon_register_interest(&cable->extcon_dev,
+			cable->extcon_name, cable->name, &cable->nb);
+	if (ret < 0) {
+		pr_info("Cannot register extcon_dev for %s(cable: %s).\n",
+				cable->extcon_name,
+				cable->name);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
 static int charger_manager_probe(struct platform_device *pdev)
 {
 	struct charger_desc *desc = dev_get_platdata(&pdev->dev);
 	struct charger_manager *cm;
 	int ret = 0, i = 0;
+	int j = 0;
 	union power_supply_propval val;
 
 	if (g_desc && !rtc_dev && g_desc->rtc_name) {
@@ -1167,11 +1245,31 @@ static int charger_manager_probe(struct platform_device *pdev)
 		goto err_register;
 	}
 
-	ret = regulator_bulk_get(&pdev->dev, desc->num_charger_regulators,
-				 desc->charger_regulators);
-	if (ret) {
-		dev_err(&pdev->dev, "Cannot get charger regulators.\n");
-		goto err_bulk_get;
+	for (i = 0 ; i < desc->num_charger_regulators ; i++) {
+		struct charger_regulator *charger
+					= &desc->charger_regulators[i];
+
+		charger->consumer = regulator_get(&pdev->dev,
+					charger->regulator_name);
+		if (charger->consumer == NULL) {
+			dev_err(&pdev->dev, "Cannot find charger(%s)n",
+						charger->regulator_name);
+			ret = -EINVAL;
+			goto err_chg_get;
+		}
+
+		for (j = 0 ; j < charger->num_cables ; j++) {
+			struct charger_cable *cable = &charger->cables[j];
+
+			ret = charger_extcon_init(cm, cable);
+			if (ret < 0) {
+				dev_err(&pdev->dev, "Cannot find charger(%s)n",
+						charger->regulator_name);
+				goto err_extcon;
+			}
+			cable->charger = charger;
+			cable->cm = cm;
+		}
 	}
 
 	ret = try_charger_enable(cm, true);
@@ -1197,9 +1295,19 @@ static int charger_manager_probe(struct platform_device *pdev)
 	return 0;
 
 err_chg_enable:
-	regulator_bulk_free(desc->num_charger_regulators,
-			    desc->charger_regulators);
-err_bulk_get:
+err_extcon:
+	for (i = 0 ; i < desc->num_charger_regulators ; i++) {
+		struct charger_regulator *charger
+				= &desc->charger_regulators[i];
+		for (j = 0 ; j < charger->num_cables ; j++) {
+			struct charger_cable *cable = &charger->cables[j];
+			extcon_unregister_interest(&cable->extcon_dev);
+		}
+	}
+err_chg_get:
+	for (i = 0 ; i < desc->num_charger_regulators ; i++)
+		regulator_put(desc->charger_regulators[i].consumer);
+
 	power_supply_unregister(&cm->charger_psy);
 err_register:
 	kfree(cm->charger_psy.properties);
@@ -1218,6 +1326,8 @@ static int __devexit charger_manager_remove(struct platform_device *pdev)
 {
 	struct charger_manager *cm = platform_get_drvdata(pdev);
 	struct charger_desc *desc = cm->desc;
+	int i = 0;
+	int j = 0;
 
 	/* Remove from the list */
 	mutex_lock(&cm_list_mtx);
@@ -1229,8 +1339,18 @@ static int __devexit charger_manager_remove(struct platform_device *pdev)
 	if (delayed_work_pending(&cm_monitor_work))
 		cancel_delayed_work_sync(&cm_monitor_work);
 
-	regulator_bulk_free(desc->num_charger_regulators,
-			    desc->charger_regulators);
+	for (i = 0 ; i < desc->num_charger_regulators ; i++) {
+		struct charger_regulator *charger
+				= &desc->charger_regulators[i];
+		for (j = 0 ; j < charger->num_cables ; j++) {
+			struct charger_cable *cable = &charger->cables[j];
+			extcon_unregister_interest(&cable->extcon_dev);
+		}
+	}
+
+	for (i = 0 ; i < desc->num_charger_regulators ; i++)
+		regulator_put(desc->charger_regulators[i].consumer);
+
 	power_supply_unregister(&cm->charger_psy);
 
 	try_charger_enable(cm, false);
diff --git a/drivers/power/ds2781_battery.c b/drivers/power/ds2781_battery.c
index 5f92a4bb33f9..7a1ff4e4cf9a 100644
--- a/drivers/power/ds2781_battery.c
+++ b/drivers/power/ds2781_battery.c
@@ -64,7 +64,7 @@ static inline int ds2781_battery_io(struct ds2781_device_info *dev_info,
 	return w1_ds2781_io(dev_info->w1_dev, buf, addr, count, io);
 }
 
-int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf,
+static int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf,
 		int addr, size_t count)
 {
 	return ds2781_battery_io(dev_info, buf, addr, count, 0);
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index 8672c9177dd7..cb2aa3195687 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -54,7 +54,7 @@ static int gpio_charger_get_property(struct power_supply *psy,
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_ONLINE:
-		val->intval = gpio_get_value(pdata->gpio);
+		val->intval = gpio_get_value_cansleep(pdata->gpio);
 		val->intval ^= pdata->gpio_active_low;
 		break;
 	default:
diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c
index d8b75780bfef..6a364f4798f7 100644
--- a/drivers/power/lp8727_charger.c
+++ b/drivers/power/lp8727_charger.c
@@ -15,7 +15,7 @@
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
 #include <linux/power_supply.h>
-#include <linux/lp8727.h>
+#include <linux/platform_data/lp8727.h>
 
 #define DEBOUNCE_MSEC	270
 
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index 140788b309f8..74abc6c755b4 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -113,6 +113,7 @@ static enum power_supply_property max17042_battery_props[] = {
 	POWER_SUPPLY_PROP_VOLTAGE_OCV,
 	POWER_SUPPLY_PROP_CAPACITY,
 	POWER_SUPPLY_PROP_CHARGE_FULL,
+	POWER_SUPPLY_PROP_CHARGE_COUNTER,
 	POWER_SUPPLY_PROP_TEMP,
 	POWER_SUPPLY_PROP_CURRENT_NOW,
 	POWER_SUPPLY_PROP_CURRENT_AVG,
@@ -201,6 +202,13 @@ static int max17042_get_property(struct power_supply *psy,
 
 		val->intval = ret * 1000 / 2;
 		break;
+	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+		ret = max17042_read_reg(chip->client, MAX17042_QH);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret * 1000 / 2;
+		break;
 	case POWER_SUPPLY_PROP_TEMP:
 		ret = max17042_read_reg(chip->client, MAX17042_TEMP);
 		if (ret < 0)
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 7385092f9bc8..55b10b813353 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -231,11 +231,9 @@ static int olpc_bat_get_charge_full_design(union power_supply_propval *val)
 
 	case POWER_SUPPLY_TECHNOLOGY_LiFe:
 		switch (mfr) {
-		case 1: /* Gold Peak */
-			val->intval = 2800000;
-			break;
+		case 1: /* Gold Peak, fall through */
 		case 2: /* BYD */
-			val->intval = 3100000;
+			val->intval = 2800000;
 			break;
 		default:
 			return -EIO;
@@ -267,6 +265,55 @@ static int olpc_bat_get_charge_now(union power_supply_propval *val)
 	return 0;
 }
 
+static int olpc_bat_get_voltage_max_design(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	union power_supply_propval tech;
+	int mfr;
+	int ret;
+
+	ret = olpc_bat_get_tech(&tech);
+	if (ret)
+		return ret;
+
+	ec_byte = BAT_ADDR_MFR_TYPE;
+	ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+	if (ret)
+		return ret;
+
+	mfr = ec_byte >> 4;
+
+	switch (tech.intval) {
+	case POWER_SUPPLY_TECHNOLOGY_NiMH:
+		switch (mfr) {
+		case 1: /* Gold Peak */
+			val->intval = 6000000;
+			break;
+		default:
+			return -EIO;
+		}
+		break;
+
+	case POWER_SUPPLY_TECHNOLOGY_LiFe:
+		switch (mfr) {
+		case 1: /* Gold Peak */
+			val->intval = 6400000;
+			break;
+		case 2: /* BYD */
+			val->intval = 6500000;
+			break;
+		default:
+			return -EIO;
+		}
+		break;
+
+	default:
+		return -EIO;
+	}
+
+	return ret;
+}
+
 /*********************************************************************
  *		Battery properties
  *********************************************************************/
@@ -401,6 +448,11 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
 		val->strval = bat_serial;
 		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+		ret = olpc_bat_get_voltage_max_design(val);
+		if (ret)
+			return ret;
+		break;
 	default:
 		ret = -EINVAL;
 		break;
@@ -428,6 +480,7 @@ static enum power_supply_property olpc_xo1_bat_props[] = {
 	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_SERIAL_NUMBER,
 	POWER_SUPPLY_PROP_CHARGE_COUNTER,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 };
 
 /* XO-1.5 does not have ambient temperature property */
@@ -449,6 +502,7 @@ static enum power_supply_property olpc_xo15_bat_props[] = {
 	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_SERIAL_NUMBER,
 	POWER_SUPPLY_PROP_CHARGE_COUNTER,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 };
 
 /* EEPROM reading goes completely around the power_supply API, sadly */
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index 8dbcd53c5e67..6a1ca735e935 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -134,13 +134,13 @@ static void update_charger(void)
 			regulator_set_current_limit(ac_draw, max_uA, max_uA);
 			if (!regulator_enabled) {
 				dev_dbg(dev, "charger on (AC)\n");
-				regulator_enable(ac_draw);
+				WARN_ON(regulator_enable(ac_draw));
 				regulator_enabled = 1;
 			}
 		} else {
 			if (regulator_enabled) {
 				dev_dbg(dev, "charger off\n");
-				regulator_disable(ac_draw);
+				WARN_ON(regulator_disable(ac_draw));
 				regulator_enabled = 0;
 			}
 		}
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 6ad612726785..08cc8a3c15af 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -17,6 +17,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/power_supply.h>
+#include <linux/thermal.h>
 #include "power_supply.h"
 
 /* exported for the APM Power driver, APM emulation */
@@ -169,6 +170,63 @@ static void power_supply_dev_release(struct device *dev)
 	kfree(dev);
 }
 
+#ifdef CONFIG_THERMAL
+static int power_supply_read_temp(struct thermal_zone_device *tzd,
+		unsigned long *temp)
+{
+	struct power_supply *psy;
+	union power_supply_propval val;
+	int ret;
+
+	WARN_ON(tzd == NULL);
+	psy = tzd->devdata;
+	ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &val);
+
+	/* Convert tenths of degree Celsius to milli degree Celsius. */
+	if (!ret)
+		*temp = val.intval * 100;
+
+	return ret;
+}
+
+static struct thermal_zone_device_ops psy_tzd_ops = {
+	.get_temp = power_supply_read_temp,
+};
+
+static int psy_register_thermal(struct power_supply *psy)
+{
+	int i;
+
+	/* Register battery zone device psy reports temperature */
+	for (i = 0; i < psy->num_properties; i++) {
+		if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) {
+			psy->tzd = thermal_zone_device_register(psy->name, 0, 0,
+					psy, &psy_tzd_ops, 0, 0, 0, 0);
+			if (IS_ERR(psy->tzd))
+				return PTR_ERR(psy->tzd);
+			break;
+		}
+	}
+	return 0;
+}
+
+static void psy_unregister_thermal(struct power_supply *psy)
+{
+	if (IS_ERR_OR_NULL(psy->tzd))
+		return;
+	thermal_zone_device_unregister(psy->tzd);
+}
+#else
+static int psy_register_thermal(struct power_supply *psy)
+{
+	return 0;
+}
+
+static void psy_unregister_thermal(struct power_supply *psy)
+{
+}
+#endif
+
 int power_supply_register(struct device *parent, struct power_supply *psy)
 {
 	struct device *dev;
@@ -197,6 +255,10 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
 	if (rc)
 		goto device_add_failed;
 
+	rc = psy_register_thermal(psy);
+	if (rc)
+		goto register_thermal_failed;
+
 	rc = power_supply_create_triggers(psy);
 	if (rc)
 		goto create_triggers_failed;
@@ -206,6 +268,8 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
 	goto success;
 
 create_triggers_failed:
+	psy_unregister_thermal(psy);
+register_thermal_failed:
 	device_del(dev);
 kobject_set_name_failed:
 device_add_failed:
@@ -220,6 +284,7 @@ void power_supply_unregister(struct power_supply *psy)
 	cancel_work_sync(&psy->changed_work);
 	sysfs_remove_link(&psy->dev->kobj, "powers");
 	power_supply_remove_triggers(psy);
+	psy_unregister_thermal(psy);
 	device_unregister(psy->dev);
 }
 EXPORT_SYMBOL_GPL(power_supply_unregister);
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 4150747f9186..1d96614a17a4 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -159,6 +159,8 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(charge_now),
 	POWER_SUPPLY_ATTR(charge_avg),
 	POWER_SUPPLY_ATTR(charge_counter),
+	POWER_SUPPLY_ATTR(constant_charge_current),
+	POWER_SUPPLY_ATTR(constant_charge_voltage),
 	POWER_SUPPLY_ATTR(energy_full_design),
 	POWER_SUPPLY_ATTR(energy_empty_design),
 	POWER_SUPPLY_ATTR(energy_full),
@@ -166,9 +168,15 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(energy_now),
 	POWER_SUPPLY_ATTR(energy_avg),
 	POWER_SUPPLY_ATTR(capacity),
+	POWER_SUPPLY_ATTR(capacity_alert_min),
+	POWER_SUPPLY_ATTR(capacity_alert_max),
 	POWER_SUPPLY_ATTR(capacity_level),
 	POWER_SUPPLY_ATTR(temp),
+	POWER_SUPPLY_ATTR(temp_alert_min),
+	POWER_SUPPLY_ATTR(temp_alert_max),
 	POWER_SUPPLY_ATTR(temp_ambient),
+	POWER_SUPPLY_ATTR(temp_ambient_alert_min),
+	POWER_SUPPLY_ATTR(temp_ambient_alert_max),
 	POWER_SUPPLY_ATTR(time_to_empty_now),
 	POWER_SUPPLY_ATTR(time_to_empty_avg),
 	POWER_SUPPLY_ATTR(time_to_full_now),
diff --git a/drivers/power/sbs-battery.c b/drivers/power/sbs-battery.c
index a5b6849d4123..a65e8f54157e 100644
--- a/drivers/power/sbs-battery.c
+++ b/drivers/power/sbs-battery.c
@@ -469,7 +469,7 @@ static int sbs_get_property(struct power_supply *psy,
 
 	case POWER_SUPPLY_PROP_TECHNOLOGY:
 		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
-		break;
+		goto done; /* don't trigger power_supply_changed()! */
 
 	case POWER_SUPPLY_PROP_ENERGY_NOW:
 	case POWER_SUPPLY_PROP_ENERGY_FULL:
diff --git a/drivers/power/smb347-charger.c b/drivers/power/smb347-charger.c
index f8eedd8a676f..332dd0110bda 100644
--- a/drivers/power/smb347-charger.c
+++ b/drivers/power/smb347-charger.c
@@ -196,6 +196,14 @@ static const unsigned int ccc_tbl[] = {
 	1200000,
 };
 
+/* Convert register value to current using lookup table */
+static int hw_to_current(const unsigned int *tbl, size_t size, unsigned int val)
+{
+	if (val >= size)
+		return -EINVAL;
+	return tbl[val];
+}
+
 /* Convert current to register value using lookup table */
 static int current_to_hw(const unsigned int *tbl, size_t size, unsigned int val)
 {
@@ -841,22 +849,101 @@ fail:
 	return ret;
 }
 
+/*
+ * Returns the constant charge current programmed
+ * into the charger in uA.
+ */
+static int get_const_charge_current(struct smb347_charger *smb)
+{
+	int ret, intval;
+	unsigned int v;
+
+	if (!smb347_is_ps_online(smb))
+		return -ENODATA;
+
+	ret = regmap_read(smb->regmap, STAT_B, &v);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * The current value is composition of FCC and PCC values
+	 * and we can detect which table to use from bit 5.
+	 */
+	if (v & 0x20) {
+		intval = hw_to_current(fcc_tbl, ARRAY_SIZE(fcc_tbl), v & 7);
+	} else {
+		v >>= 3;
+		intval = hw_to_current(pcc_tbl, ARRAY_SIZE(pcc_tbl), v & 7);
+	}
+
+	return intval;
+}
+
+/*
+ * Returns the constant charge voltage programmed
+ * into the charger in uV.
+ */
+static int get_const_charge_voltage(struct smb347_charger *smb)
+{
+	int ret, intval;
+	unsigned int v;
+
+	if (!smb347_is_ps_online(smb))
+		return -ENODATA;
+
+	ret = regmap_read(smb->regmap, STAT_A, &v);
+	if (ret < 0)
+		return ret;
+
+	v &= STAT_A_FLOAT_VOLTAGE_MASK;
+	if (v > 0x3d)
+		v = 0x3d;
+
+	intval = 3500000 + v * 20000;
+
+	return intval;
+}
+
 static int smb347_mains_get_property(struct power_supply *psy,
 				     enum power_supply_property prop,
 				     union power_supply_propval *val)
 {
 	struct smb347_charger *smb =
 		container_of(psy, struct smb347_charger, mains);
+	int ret;
 
-	if (prop == POWER_SUPPLY_PROP_ONLINE) {
+	switch (prop) {
+	case POWER_SUPPLY_PROP_ONLINE:
 		val->intval = smb->mains_online;
-		return 0;
+		break;
+
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = get_const_charge_voltage(smb);
+		if (ret < 0)
+			return ret;
+		else
+			val->intval = ret;
+		break;
+
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = get_const_charge_current(smb);
+		if (ret < 0)
+			return ret;
+		else
+			val->intval = ret;
+		break;
+
+	default:
+		return -EINVAL;
 	}
-	return -EINVAL;
+
+	return 0;
 }
 
 static enum power_supply_property smb347_mains_properties[] = {
 	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 };
 
 static int smb347_usb_get_property(struct power_supply *psy,
@@ -865,16 +952,40 @@ static int smb347_usb_get_property(struct power_supply *psy,
 {
 	struct smb347_charger *smb =
 		container_of(psy, struct smb347_charger, usb);
+	int ret;
 
-	if (prop == POWER_SUPPLY_PROP_ONLINE) {
+	switch (prop) {
+	case POWER_SUPPLY_PROP_ONLINE:
 		val->intval = smb->usb_online;
-		return 0;
+		break;
+
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = get_const_charge_voltage(smb);
+		if (ret < 0)
+			return ret;
+		else
+			val->intval = ret;
+		break;
+
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = get_const_charge_current(smb);
+		if (ret < 0)
+			return ret;
+		else
+			val->intval = ret;
+		break;
+
+	default:
+		return -EINVAL;
 	}
-	return -EINVAL;
+
+	return 0;
 }
 
 static enum power_supply_property smb347_usb_properties[] = {
 	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 };
 
 static int smb347_battery_get_property(struct power_supply *psy,
diff --git a/drivers/power/test_power.c b/drivers/power/test_power.c
index b527c93bf2f3..b99a452a4fda 100644
--- a/drivers/power/test_power.c
+++ b/drivers/power/test_power.c
@@ -22,11 +22,13 @@
 #include <linux/vermagic.h>
 
 static int ac_online			= 1;
+static int usb_online			= 1;
 static int battery_status		= POWER_SUPPLY_STATUS_DISCHARGING;
 static int battery_health		= POWER_SUPPLY_HEALTH_GOOD;
 static int battery_present		= 1; /* true */
 static int battery_technology		= POWER_SUPPLY_TECHNOLOGY_LION;
 static int battery_capacity		= 50;
+static int battery_voltage		= 3300;
 
 static int test_power_get_ac_property(struct power_supply *psy,
 				      enum power_supply_property psp,
@@ -42,6 +44,20 @@ static int test_power_get_ac_property(struct power_supply *psy,
 	return 0;
 }
 
+static int test_power_get_usb_property(struct power_supply *psy,
+				      enum power_supply_property psp,
+				      union power_supply_propval *val)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = usb_online;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
 static int test_power_get_battery_property(struct power_supply *psy,
 					   enum power_supply_property psp,
 					   union power_supply_propval *val)
@@ -86,6 +102,12 @@ static int test_power_get_battery_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
 		val->intval = 3600;
 		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		val->intval = 26;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = battery_voltage;
+		break;
 	default:
 		pr_info("%s: some properties deliberately report errors.\n",
 			__func__);
@@ -114,6 +136,8 @@ static enum power_supply_property test_power_battery_props[] = {
 	POWER_SUPPLY_PROP_MODEL_NAME,
 	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_SERIAL_NUMBER,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
 };
 
 static char *test_power_ac_supplied_to[] = {
@@ -135,6 +159,14 @@ static struct power_supply test_power_supplies[] = {
 		.properties = test_power_battery_props,
 		.num_properties = ARRAY_SIZE(test_power_battery_props),
 		.get_property = test_power_get_battery_property,
+	}, {
+		.name = "test_usb",
+		.type = POWER_SUPPLY_TYPE_USB,
+		.supplied_to = test_power_ac_supplied_to,
+		.num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
+		.properties = test_power_ac_props,
+		.num_properties = ARRAY_SIZE(test_power_ac_props),
+		.get_property = test_power_get_usb_property,
 	},
 };
 
@@ -167,6 +199,7 @@ static void __exit test_power_exit(void)
 
 	/* Let's see how we handle changes... */
 	ac_online = 0;
+	usb_online = 0;
 	battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
 	for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
 		power_supply_changed(&test_power_supplies[i]);
@@ -275,6 +308,19 @@ static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
 	return strlen(buffer);
 }
 
+static int param_set_usb_online(const char *key, const struct kernel_param *kp)
+{
+	usb_online = map_get_value(map_ac_online, key, usb_online);
+	power_supply_changed(&test_power_supplies[2]);
+	return 0;
+}
+
+static int param_get_usb_online(char *buffer, const struct kernel_param *kp)
+{
+	strcpy(buffer, map_get_key(map_ac_online, usb_online, "unknown"));
+	return strlen(buffer);
+}
+
 static int param_set_battery_status(const char *key,
 					const struct kernel_param *kp)
 {
@@ -350,13 +396,31 @@ static int param_set_battery_capacity(const char *key,
 
 #define param_get_battery_capacity param_get_int
 
+static int param_set_battery_voltage(const char *key,
+					const struct kernel_param *kp)
+{
+	int tmp;
+
+	if (1 != sscanf(key, "%d", &tmp))
+		return -EINVAL;
+
+	battery_voltage = tmp;
+	power_supply_changed(&test_power_supplies[1]);
+	return 0;
+}
 
+#define param_get_battery_voltage param_get_int
 
 static struct kernel_param_ops param_ops_ac_online = {
 	.set = param_set_ac_online,
 	.get = param_get_ac_online,
 };
 
+static struct kernel_param_ops param_ops_usb_online = {
+	.set = param_set_usb_online,
+	.get = param_get_usb_online,
+};
+
 static struct kernel_param_ops param_ops_battery_status = {
 	.set = param_set_battery_status,
 	.get = param_get_battery_status,
@@ -382,18 +446,27 @@ static struct kernel_param_ops param_ops_battery_capacity = {
 	.get = param_get_battery_capacity,
 };
 
+static struct kernel_param_ops param_ops_battery_voltage = {
+	.set = param_set_battery_voltage,
+	.get = param_get_battery_voltage,
+};
 
 #define param_check_ac_online(name, p) __param_check(name, p, void);
+#define param_check_usb_online(name, p) __param_check(name, p, void);
 #define param_check_battery_status(name, p) __param_check(name, p, void);
 #define param_check_battery_present(name, p) __param_check(name, p, void);
 #define param_check_battery_technology(name, p) __param_check(name, p, void);
 #define param_check_battery_health(name, p) __param_check(name, p, void);
 #define param_check_battery_capacity(name, p) __param_check(name, p, void);
+#define param_check_battery_voltage(name, p) __param_check(name, p, void);
 
 
 module_param(ac_online, ac_online, 0644);
 MODULE_PARM_DESC(ac_online, "AC charging state <on|off>");
 
+module_param(usb_online, usb_online, 0644);
+MODULE_PARM_DESC(usb_online, "USB charging state <on|off>");
+
 module_param(battery_status, battery_status, 0644);
 MODULE_PARM_DESC(battery_status,
 	"battery status <charging|discharging|not-charging|full>");
@@ -413,6 +486,8 @@ MODULE_PARM_DESC(battery_health,
 module_param(battery_capacity, battery_capacity, 0644);
 MODULE_PARM_DESC(battery_capacity, "battery capacity (percentage)");
 
+module_param(battery_voltage, battery_voltage, 0644);
+MODULE_PARM_DESC(battery_voltage, "battery voltage (millivolts)");
 
 MODULE_DESCRIPTION("Power supply driver for testing");
 MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index 7cacbaa68efe..15f4d5d8611b 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -22,6 +22,7 @@
 #include <linux/power_supply.h>
 #include <linux/notifier.h>
 #include <linux/usb/otg.h>
+#include <linux/regulator/machine.h>
 
 #define TWL4030_BCIMSTATEC	0x02
 #define TWL4030_BCIICHG		0x08
@@ -29,6 +30,7 @@
 #define TWL4030_BCIVBUS		0x0c
 #define TWL4030_BCIMFSTS4	0x10
 #define TWL4030_BCICTL1		0x23
+#define TWL4030_BB_CFG		0x12
 
 #define TWL4030_BCIAUTOWEN	BIT(5)
 #define TWL4030_CONFIG_DONE	BIT(4)
@@ -38,6 +40,17 @@
 #define TWL4030_USBFASTMCHG	BIT(2)
 #define TWL4030_STS_VBUS	BIT(7)
 #define TWL4030_STS_USB_ID	BIT(2)
+#define TWL4030_BBCHEN		BIT(4)
+#define TWL4030_BBSEL_MASK	0b1100
+#define TWL4030_BBSEL_2V5	0b0000
+#define TWL4030_BBSEL_3V0	0b0100
+#define TWL4030_BBSEL_3V1	0b1000
+#define TWL4030_BBSEL_3V2	0b1100
+#define TWL4030_BBISEL_MASK	0b11
+#define TWL4030_BBISEL_25uA	0b00
+#define TWL4030_BBISEL_150uA	0b01
+#define TWL4030_BBISEL_500uA	0b10
+#define TWL4030_BBISEL_1000uA	0b11
 
 /* BCI interrupts */
 #define TWL4030_WOVF		BIT(0) /* Watchdog overflow */
@@ -75,6 +88,8 @@ struct twl4030_bci {
 	struct work_struct	work;
 	int			irq_chg;
 	int			irq_bci;
+	struct regulator	*usb_reg;
+	int			usb_enabled;
 
 	unsigned long		event;
 };
@@ -104,7 +119,7 @@ static int twl4030_bci_read(u8 reg, u8 *val)
 
 static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
 {
-	return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, 0,
+	return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, clear,
 			TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
 			TWL4030_PM_MASTER_BOOT_BCI);
 }
@@ -152,14 +167,14 @@ static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
 }
 
 /*
- * Enable/Disable USB Charge funtionality.
+ * Enable/Disable USB Charge functionality.
  */
 static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
 {
 	int ret;
 
 	if (enable) {
-		/* Check for USB charger conneted */
+		/* Check for USB charger connected */
 		if (!twl4030_bci_have_vbus(bci))
 			return -ENODEV;
 
@@ -172,6 +187,12 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
 			return -EACCES;
 		}
 
+		/* Need to keep regulator on */
+		if (!bci->usb_enabled) {
+			regulator_enable(bci->usb_reg);
+			bci->usb_enabled = 1;
+		}
+
 		/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
 		ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
 		if (ret < 0)
@@ -182,6 +203,10 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
 			TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
 	} else {
 		ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
+		if (bci->usb_enabled) {
+			regulator_disable(bci->usb_reg);
+			bci->usb_enabled = 0;
+		}
 	}
 
 	return ret;
@@ -203,6 +228,49 @@ static int twl4030_charger_enable_ac(bool enable)
 }
 
 /*
+ * Enable/Disable charging of Backup Battery.
+ */
+static int twl4030_charger_enable_backup(int uvolt, int uamp)
+{
+	int ret;
+	u8 flags;
+
+	if (uvolt < 2500000 ||
+	    uamp < 25) {
+		/* disable charging of backup battery */
+		ret = twl4030_clear_set(TWL4030_MODULE_PM_RECEIVER,
+					TWL4030_BBCHEN, 0, TWL4030_BB_CFG);
+		return ret;
+	}
+
+	flags = TWL4030_BBCHEN;
+	if (uvolt >= 3200000)
+		flags |= TWL4030_BBSEL_3V2;
+	else if (uvolt >= 3100000)
+		flags |= TWL4030_BBSEL_3V1;
+	else if (uvolt >= 3000000)
+		flags |= TWL4030_BBSEL_3V0;
+	else
+		flags |= TWL4030_BBSEL_2V5;
+
+	if (uamp >= 1000)
+		flags |= TWL4030_BBISEL_1000uA;
+	else if (uamp >= 500)
+		flags |= TWL4030_BBISEL_500uA;
+	else if (uamp >= 150)
+		flags |= TWL4030_BBISEL_150uA;
+	else
+		flags |= TWL4030_BBISEL_25uA;
+
+	ret = twl4030_clear_set(TWL4030_MODULE_PM_RECEIVER,
+				TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK,
+				flags,
+				TWL4030_BB_CFG);
+
+	return ret;
+}
+
+/*
  * TWL4030 CHG_PRES (AC charger presence) events
  */
 static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
@@ -425,6 +493,7 @@ static enum power_supply_property twl4030_charger_props[] = {
 static int __init twl4030_bci_probe(struct platform_device *pdev)
 {
 	struct twl4030_bci *bci;
+	struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
 	int ret;
 	u32 reg;
 
@@ -456,6 +525,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
 	bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
 	bci->usb.get_property = twl4030_bci_get_property;
 
+	bci->usb_reg = regulator_get(bci->dev, "bci3v1");
+
 	ret = power_supply_register(&pdev->dev, &bci->usb);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
@@ -504,6 +575,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
 
 	twl4030_charger_enable_ac(true);
 	twl4030_charger_enable_usb(bci, true);
+	twl4030_charger_enable_backup(pdata->bb_uvolt,
+				      pdata->bb_uamp);
 
 	return 0;
 
@@ -532,6 +605,7 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
 
 	twl4030_charger_enable_ac(false);
 	twl4030_charger_enable_usb(bci, false);
+	twl4030_charger_enable_backup(0, 0);
 
 	/* mask interrupts */
 	twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,