Merge tag 'for-v3.14' of git://git.infradead.org/battery-2.6

Pull battery updates from Dmitry Eremin-Solenikov:
 "I'm picking up power supply maintainership from Anton Vorontov.  Could
  you please pull battery-2.6 git tree changes prepared for the v3.14
  release.

  Highlights:

   - Power supply notifier

   - Several drivers gained DT support

   - Added Maxim 14577 driver

   - Change of maintainer"

* tag 'for-v3.14' of git://git.infradead.org/battery-2.6:
  MAINTAINERS: Pick up power supply maintainership
  max17042_battery: Add IRQF_ONESHOT flag to use default irq handler
  gpio-charger: Support wakeup events
  power_supply: Add charger support for Maxim 14577
  dt: Binding documentation for isp1704 charger
  isp1704_charger: Add DT support
  charger-manager: of_cm_parse_desc() should be static
  bq2415x_charger: Add DT support
  power_supply: Add power_supply_get_by_phandle
  bq2415x_charger: Use power_supply notifier for automode
  power: reset: Add as3722 power-off driver
  mfd: AS3722: Add dt node properties for system power controller
  charger-manager: Support deivce tree in charger manager driver
  charger-manager: Modify the way of checking battery's temperature
  power_supply: Add power_supply notifier

12 files changed, 890 insertions, 75 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 85ad58c6da17..0196acf05231 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -317,6 +317,13 @@ config CHARGER_MANAGER
           runtime and in suspend-to-RAM by waking up the system periodically
           with help of suspend_again support.
 
+config CHARGER_MAX14577
+	tristate "Maxim MAX14577 MUIC battery charger driver"
+	depends on MFD_MAX14577
+	help
+	  Say Y to enable support for the battery charger control sysfs and
+	  platform data of MAX14577 MUICs.
+
 config CHARGER_MAX8997
 	tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"
 	depends on MFD_MAX8997 && REGULATOR_MAX8997
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 372b4e8ab598..ee54a3e4c90a 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_CHARGER_LP8727)	+= lp8727_charger.o
 obj-$(CONFIG_CHARGER_LP8788)	+= lp8788-charger.o
 obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o
 obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o
+obj-$(CONFIG_CHARGER_MAX14577)	+= max14577_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o
diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c
index df893dd1447d..79a37f6d3307 100644
--- a/drivers/power/bq2415x_charger.c
+++ b/drivers/power/bq2415x_charger.c
@@ -1,7 +1,7 @@
 /*
  * bq2415x charger driver
  *
- * Copyright (C) 2011-2012  Pali Rohár <pali.rohar@gmail.com>
+ * Copyright (C) 2011-2013  Pali Rohár <pali.rohar@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -170,6 +170,8 @@ struct bq2415x_device {
 	struct bq2415x_platform_data init_data;
 	struct power_supply charger;
 	struct delayed_work work;
+	struct power_supply *notify_psy;
+	struct notifier_block nb;
 	enum bq2415x_mode reported_mode;/* mode reported by hook function */
 	enum bq2415x_mode mode;		/* current configured mode */
 	enum bq2415x_chip chip;
@@ -795,24 +797,53 @@ static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
 
 }
 
-/* hook function called by other driver which set reported mode */
-static void bq2415x_hook_function(enum bq2415x_mode mode, void *data)
+static int bq2415x_notifier_call(struct notifier_block *nb,
+		unsigned long val, void *v)
 {
-	struct bq2415x_device *bq = data;
+	struct bq2415x_device *bq =
+		container_of(nb, struct bq2415x_device, nb);
+	struct power_supply *psy = v;
+	enum bq2415x_mode mode;
+	union power_supply_propval prop;
+	int ret;
+	int mA;
 
-	if (!bq)
-		return;
+	if (val != PSY_EVENT_PROP_CHANGED)
+		return NOTIFY_OK;
+
+	if (psy != bq->notify_psy)
+		return NOTIFY_OK;
+
+	dev_dbg(bq->dev, "notifier call was called\n");
+
+	ret = psy->get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
+	if (ret != 0)
+		return NOTIFY_OK;
+
+	mA = prop.intval;
+
+	if (mA == 0)
+		mode = BQ2415X_MODE_OFF;
+	else if (mA < 500)
+		mode = BQ2415X_MODE_NONE;
+	else if (mA < 1800)
+		mode = BQ2415X_MODE_HOST_CHARGER;
+	else
+		mode = BQ2415X_MODE_DEDICATED_CHARGER;
+
+	if (bq->reported_mode == mode)
+		return NOTIFY_OK;
 
-	dev_dbg(bq->dev, "hook function was called\n");
 	bq->reported_mode = mode;
 
 	/* if automode is not enabled do not tell about reported_mode */
 	if (bq->automode < 1)
-		return;
+		return NOTIFY_OK;
 
 	sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode");
 	bq2415x_set_mode(bq, bq->reported_mode);
 
+	return NOTIFY_OK;
 }
 
 /**** timer functions ****/
@@ -1512,9 +1543,11 @@ static int bq2415x_probe(struct i2c_client *client,
 	int num;
 	char *name;
 	struct bq2415x_device *bq;
+	struct device_node *np = client->dev.of_node;
+	struct bq2415x_platform_data *pdata = client->dev.platform_data;
 
-	if (!client->dev.platform_data) {
-		dev_err(&client->dev, "platform data not set\n");
+	if (!np && !pdata) {
+		dev_err(&client->dev, "platform data missing\n");
 		return -ENODEV;
 	}
 
@@ -1539,6 +1572,17 @@ static int bq2415x_probe(struct i2c_client *client,
 		goto error_2;
 	}
 
+	if (np) {
+		bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection");
+
+		if (!bq->notify_psy)
+			return -EPROBE_DEFER;
+	}
+	else if (pdata->notify_device)
+		bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
+	else
+		bq->notify_psy = NULL;
+
 	i2c_set_clientdata(client, bq);
 
 	bq->id = num;
@@ -1550,8 +1594,34 @@ static int bq2415x_probe(struct i2c_client *client,
 	bq->autotimer = 0;
 	bq->automode = 0;
 
-	memcpy(&bq->init_data, client->dev.platform_data,
-			sizeof(bq->init_data));
+	if (np) {
+		ret = of_property_read_u32(np, "ti,current-limit",
+				&bq->init_data.current_limit);
+		if (ret)
+			return ret;
+		ret = of_property_read_u32(np, "ti,weak-battery-voltage",
+				&bq->init_data.weak_battery_voltage);
+		if (ret)
+			return ret;
+		ret = of_property_read_u32(np, "ti,battery-regulation-voltage",
+				&bq->init_data.battery_regulation_voltage);
+		if (ret)
+			return ret;
+		ret = of_property_read_u32(np, "ti,charge-current",
+				&bq->init_data.charge_current);
+		if (ret)
+			return ret;
+		ret = of_property_read_u32(np, "ti,termination-current",
+				&bq->init_data.termination_current);
+		if (ret)
+			return ret;
+		ret = of_property_read_u32(np, "ti,resistor-sense",
+				&bq->init_data.resistor_sense);
+		if (ret)
+			return ret;
+	} else {
+		memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
+	}
 
 	bq2415x_reset_chip(bq);
 
@@ -1573,16 +1643,20 @@ static int bq2415x_probe(struct i2c_client *client,
 		goto error_4;
 	}
 
-	if (bq->init_data.set_mode_hook) {
-		if (bq->init_data.set_mode_hook(
-				bq2415x_hook_function, bq)) {
-			bq->automode = 1;
-			bq2415x_set_mode(bq, bq->reported_mode);
-			dev_info(bq->dev, "automode enabled\n");
-		} else {
-			bq->automode = -1;
-			dev_info(bq->dev, "automode failed\n");
+	if (bq->notify_psy) {
+		bq->nb.notifier_call = bq2415x_notifier_call;
+		ret = power_supply_reg_notifier(&bq->nb);
+		if (ret) {
+			dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
+			goto error_5;
 		}
+
+		/* Query for initial reported_mode and set it */
+		bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED, bq->notify_psy);
+		bq2415x_set_mode(bq, bq->reported_mode);
+
+		bq->automode = 1;
+		dev_info(bq->dev, "automode enabled\n");
 	} else {
 		bq->automode = -1;
 		dev_info(bq->dev, "automode not supported\n");
@@ -1594,6 +1668,7 @@ static int bq2415x_probe(struct i2c_client *client,
 	dev_info(bq->dev, "driver registered\n");
 	return 0;
 
+error_5:
 error_4:
 	bq2415x_sysfs_exit(bq);
 error_3:
@@ -1614,8 +1689,8 @@ static int bq2415x_remove(struct i2c_client *client)
 {
 	struct bq2415x_device *bq = i2c_get_clientdata(client);
 
-	if (bq->init_data.set_mode_hook)
-		bq->init_data.set_mode_hook(NULL, NULL);
+	if (bq->notify_psy)
+		power_supply_unreg_notifier(&bq->nb);
 
 	bq2415x_sysfs_exit(bq);
 	bq2415x_power_supply_exit(bq);
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index 7287c0efd6bf..9e4dab46eefd 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -25,12 +25,23 @@
 #include <linux/power/charger-manager.h>
 #include <linux/regulator/consumer.h>
 #include <linux/sysfs.h>
+#include <linux/of.h>
+#include <linux/thermal.h>
+
+/*
+ * Default termperature threshold for charging.
+ * Every temperature units are in tenth of centigrade.
+ */
+#define CM_DEFAULT_RECHARGE_TEMP_DIFF	50
+#define CM_DEFAULT_CHARGE_TEMP_MAX	500
 
 static const char * const default_event_names[] = {
 	[CM_EVENT_UNKNOWN] = "Unknown",
 	[CM_EVENT_BATT_FULL] = "Battery Full",
 	[CM_EVENT_BATT_IN] = "Battery Inserted",
 	[CM_EVENT_BATT_OUT] = "Battery Pulled Out",
+	[CM_EVENT_BATT_OVERHEAT] = "Battery Overheat",
+	[CM_EVENT_BATT_COLD] = "Battery Cold",
 	[CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach",
 	[CM_EVENT_CHG_START_STOP] = "Charging Start/Stop",
 	[CM_EVENT_OTHERS] = "Other battery events"
@@ -518,7 +529,7 @@ static int check_charging_duration(struct charger_manager *cm)
 		duration = curr - cm->charging_start_time;
 
 		if (duration > desc->charging_max_duration_ms) {
-			dev_info(cm->dev, "Charging duration exceed %lldms\n",
+			dev_info(cm->dev, "Charging duration exceed %ums\n",
 				 desc->charging_max_duration_ms);
 			uevent_notify(cm, "Discharging");
 			try_charger_enable(cm, false);
@@ -529,7 +540,7 @@ static int check_charging_duration(struct charger_manager *cm)
 
 		if (duration > desc->charging_max_duration_ms &&
 				is_ext_pwr_online(cm)) {
-			dev_info(cm->dev, "Discharging duration exceed %lldms\n",
+			dev_info(cm->dev, "Discharging duration exceed %ums\n",
 				 desc->discharging_max_duration_ms);
 			uevent_notify(cm, "Recharging");
 			try_charger_enable(cm, true);
@@ -540,6 +551,60 @@ static int check_charging_duration(struct charger_manager *cm)
 	return ret;
 }
 
+static int cm_get_battery_temperature(struct charger_manager *cm,
+					int *temp)
+{
+	int ret;
+
+	if (!cm->desc->measure_battery_temp)
+		return -ENODEV;
+
+#ifdef CONFIG_THERMAL
+	ret = thermal_zone_get_temp(cm->tzd_batt, (unsigned long *)temp);
+	if (!ret)
+		/* Calibrate temperature unit */
+		*temp /= 100;
+#else
+	ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+				POWER_SUPPLY_PROP_TEMP,
+				(union power_supply_propval *)temp);
+#endif
+	return ret;
+}
+
+static int cm_check_thermal_status(struct charger_manager *cm)
+{
+	struct charger_desc *desc = cm->desc;
+	int temp, upper_limit, lower_limit;
+	int ret = 0;
+
+	ret = cm_get_battery_temperature(cm, &temp);
+	if (ret) {
+		/* FIXME:
+		 * No information of battery temperature might
+		 * occur hazadous result. We have to handle it
+		 * depending on battery type.
+		 */
+		dev_err(cm->dev, "Failed to get battery temperature\n");
+		return 0;
+	}
+
+	upper_limit = desc->temp_max;
+	lower_limit = desc->temp_min;
+
+	if (cm->emergency_stop) {
+		upper_limit -= desc->temp_diff;
+		lower_limit += desc->temp_diff;
+	}
+
+	if (temp > upper_limit)
+		ret = CM_EVENT_BATT_OVERHEAT;
+	else if (temp < lower_limit)
+		ret = CM_EVENT_BATT_COLD;
+
+	return ret;
+}
+
 /**
  * _cm_monitor - Monitor the temperature and return true for exceptions.
  * @cm: the Charger Manager representing the battery.
@@ -549,28 +614,22 @@ static int check_charging_duration(struct charger_manager *cm)
  */
 static bool _cm_monitor(struct charger_manager *cm)
 {
-	struct charger_desc *desc = cm->desc;
-	int temp = desc->temperature_out_of_range(&cm->last_temp_mC);
+	int temp_alrt;
 
-	dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
-		cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
+	temp_alrt = cm_check_thermal_status(cm);
 
 	/* It has been stopped already */
-	if (temp && cm->emergency_stop)
+	if (temp_alrt && 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)) {
-			if (temp > 0)
-				uevent_notify(cm, "OVERHEAT");
-			else
-				uevent_notify(cm, "COLD");
-		}
+	if (temp_alrt) {
+		cm->emergency_stop = temp_alrt;
+		if (!try_charger_enable(cm, false))
+			uevent_notify(cm, default_event_names[temp_alrt]);
 
 	/*
 	 * Check whole charging duration and discharing duration
@@ -802,21 +861,8 @@ static int charger_get_property(struct power_supply *psy,
 				POWER_SUPPLY_PROP_CURRENT_NOW, val);
 		break;
 	case POWER_SUPPLY_PROP_TEMP:
-		/* in thenth of centigrade */
-		if (cm->last_temp_mC == INT_MIN)
-			desc->temperature_out_of_range(&cm->last_temp_mC);
-		val->intval = cm->last_temp_mC / 100;
-		if (!desc->measure_battery_temp)
-			ret = -ENODEV;
-		break;
 	case POWER_SUPPLY_PROP_TEMP_AMBIENT:
-		/* in thenth of centigrade */
-		if (cm->last_temp_mC == INT_MIN)
-			desc->temperature_out_of_range(&cm->last_temp_mC);
-		val->intval = cm->last_temp_mC / 100;
-		if (desc->measure_battery_temp)
-			ret = -ENODEV;
-		break;
+		return cm_get_battery_temperature(cm, &val->intval);
 	case POWER_SUPPLY_PROP_CAPACITY:
 		if (!cm->fuel_gauge) {
 			ret = -ENODEV;
@@ -1439,9 +1485,183 @@ err:
 	return ret;
 }
 
+static int cm_init_thermal_data(struct charger_manager *cm)
+{
+	struct charger_desc *desc = cm->desc;
+	union power_supply_propval val;
+	int ret;
+
+	/* Verify whether fuel gauge provides battery temperature */
+	ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+					POWER_SUPPLY_PROP_TEMP, &val);
+
+	if (!ret) {
+		cm->charger_psy.properties[cm->charger_psy.num_properties] =
+				POWER_SUPPLY_PROP_TEMP;
+		cm->charger_psy.num_properties++;
+		cm->desc->measure_battery_temp = true;
+	}
+#ifdef CONFIG_THERMAL
+	cm->tzd_batt = cm->fuel_gauge->tzd;
+
+	if (ret && desc->thermal_zone) {
+		cm->tzd_batt =
+			thermal_zone_get_zone_by_name(desc->thermal_zone);
+		if (IS_ERR(cm->tzd_batt))
+			return PTR_ERR(cm->tzd_batt);
+
+		/* Use external thermometer */
+		cm->charger_psy.properties[cm->charger_psy.num_properties] =
+				POWER_SUPPLY_PROP_TEMP_AMBIENT;
+		cm->charger_psy.num_properties++;
+		cm->desc->measure_battery_temp = true;
+		ret = 0;
+	}
+#endif
+	if (cm->desc->measure_battery_temp) {
+		/* NOTICE : Default allowable minimum charge temperature is 0 */
+		if (!desc->temp_max)
+			desc->temp_max = CM_DEFAULT_CHARGE_TEMP_MAX;
+		if (!desc->temp_diff)
+			desc->temp_diff = CM_DEFAULT_RECHARGE_TEMP_DIFF;
+	}
+
+	return ret;
+}
+
+static struct of_device_id charger_manager_match[] = {
+	{
+		.compatible = "charger-manager",
+	},
+	{},
+};
+
+static struct charger_desc *of_cm_parse_desc(struct device *dev)
+{
+	struct charger_desc *desc;
+	struct device_node *np = dev->of_node;
+	u32 poll_mode = CM_POLL_DISABLE;
+	u32 battery_stat = CM_NO_BATTERY;
+	int num_chgs = 0;
+
+	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
+	if (!desc)
+		return ERR_PTR(-ENOMEM);
+
+	of_property_read_string(np, "cm-name", &desc->psy_name);
+
+	of_property_read_u32(np, "cm-poll-mode", &poll_mode);
+	desc->polling_mode = poll_mode;
+
+	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);
+	of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc);
+	of_property_read_u32(np, "cm-fullbatt-capacity",
+					&desc->fullbatt_full_capacity);
+
+	of_property_read_u32(np, "cm-battery-stat", &battery_stat);
+	desc->battery_present = battery_stat;
+
+	/* chargers */
+	of_property_read_u32(np, "cm-num-chargers", &num_chgs);
+	if (num_chgs) {
+		/* Allocate empty bin at the tail of array */
+		desc->psy_charger_stat = devm_kzalloc(dev, sizeof(char *)
+						* (num_chgs + 1), GFP_KERNEL);
+		if (desc->psy_charger_stat) {
+			int i;
+			for (i = 0; i < num_chgs; i++)
+				of_property_read_string_index(np, "cm-chargers",
+						i, &desc->psy_charger_stat[i]);
+		} else {
+			return ERR_PTR(-ENOMEM);
+		}
+	}
+
+	of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge);
+
+	of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone);
+
+	of_property_read_u32(np, "cm-battery-cold", &desc->temp_min);
+	if (of_get_property(np, "cm-battery-cold-in-minus", NULL))
+		desc->temp_min *= -1;
+	of_property_read_u32(np, "cm-battery-hot", &desc->temp_max);
+	of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff);
+
+	of_property_read_u32(np, "cm-charging-max",
+				&desc->charging_max_duration_ms);
+	of_property_read_u32(np, "cm-discharging-max",
+				&desc->discharging_max_duration_ms);
+
+	/* battery charger regualtors */
+	desc->num_charger_regulators = of_get_child_count(np);
+	if (desc->num_charger_regulators) {
+		struct charger_regulator *chg_regs;
+		struct device_node *child;
+
+		chg_regs = devm_kzalloc(dev, sizeof(*chg_regs)
+					* desc->num_charger_regulators,
+					GFP_KERNEL);
+		if (!chg_regs)
+			return ERR_PTR(-ENOMEM);
+
+		desc->charger_regulators = chg_regs;
+
+		for_each_child_of_node(np, child) {
+			struct charger_cable *cables;
+			struct device_node *_child;
+
+			of_property_read_string(child, "cm-regulator-name",
+					&chg_regs->regulator_name);
+
+			/* charger cables */
+			chg_regs->num_cables = of_get_child_count(child);
+			if (chg_regs->num_cables) {
+				cables = devm_kzalloc(dev, sizeof(*cables)
+						* chg_regs->num_cables,
+						GFP_KERNEL);
+				if (!cables)
+					return ERR_PTR(-ENOMEM);
+
+				chg_regs->cables = cables;
+
+				for_each_child_of_node(child, _child) {
+					of_property_read_string(_child,
+					"cm-cable-name", &cables->name);
+					of_property_read_string(_child,
+					"cm-cable-extcon",
+					&cables->extcon_name);
+					of_property_read_u32(_child,
+					"cm-cable-min",
+					&cables->min_uA);
+					of_property_read_u32(_child,
+					"cm-cable-max",
+					&cables->max_uA);
+					cables++;
+				}
+			}
+			chg_regs++;
+		}
+	}
+	return desc;
+}
+
+static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev)
+{
+	if (pdev->dev.of_node)
+		return of_cm_parse_desc(&pdev->dev);
+	return (struct charger_desc *)dev_get_platdata(&pdev->dev);
+}
+
 static int charger_manager_probe(struct platform_device *pdev)
 {
-	struct charger_desc *desc = dev_get_platdata(&pdev->dev);
+	struct charger_desc *desc = cm_get_drv_data(pdev);
 	struct charger_manager *cm;
 	int ret = 0, i = 0;
 	int j = 0;
@@ -1470,7 +1690,6 @@ static int charger_manager_probe(struct platform_device *pdev)
 	/* Basic Values. Unspecified are Null or 0 */
 	cm->dev = &pdev->dev;
 	cm->desc = desc;
-	cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */
 
 	/*
 	 * The following two do not need to be errors.
@@ -1533,11 +1752,6 @@ static int charger_manager_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	if (!desc->temperature_out_of_range) {
-		dev_err(&pdev->dev, "there is no temperature_out_of_range\n");
-		return -EINVAL;
-	}
-
 	if (!desc->charging_max_duration_ms ||
 			!desc->discharging_max_duration_ms) {
 		dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n");
@@ -1583,14 +1797,10 @@ static int charger_manager_probe(struct platform_device *pdev)
 		cm->charger_psy.num_properties++;
 	}
 
-	if (desc->measure_battery_temp) {
-		cm->charger_psy.properties[cm->charger_psy.num_properties] =
-				POWER_SUPPLY_PROP_TEMP;
-		cm->charger_psy.num_properties++;
-	} else {
-		cm->charger_psy.properties[cm->charger_psy.num_properties] =
-				POWER_SUPPLY_PROP_TEMP_AMBIENT;
-		cm->charger_psy.num_properties++;
+	ret = cm_init_thermal_data(cm);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initialize thermal data\n");
+		cm->desc->measure_battery_temp = false;
 	}
 
 	INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
@@ -1808,6 +2018,7 @@ static struct platform_driver charger_manager_driver = {
 		.name = "charger-manager",
 		.owner = THIS_MODULE,
 		.pm = &charger_manager_pm,
+		.of_match_table = charger_manager_match,
 	},
 	.probe = charger_manager_probe,
 	.remove = charger_manager_remove,
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index 4e858a23568f..a0024b252197 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -28,6 +28,7 @@
 struct gpio_charger {
 	const struct gpio_charger_platform_data *pdata;
 	unsigned int irq;
+	bool wakeup_enabled;
 
 	struct power_supply charger;
 };
@@ -136,6 +137,8 @@ static int gpio_charger_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, gpio_charger);
 
+	device_init_wakeup(&pdev->dev, 1);
+
 	return 0;
 
 err_gpio_free:
@@ -159,18 +162,32 @@ static int gpio_charger_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM_SLEEP
+static int gpio_charger_suspend(struct device *dev)
+{
+	struct gpio_charger *gpio_charger = dev_get_drvdata(dev);
+
+	if (device_may_wakeup(dev))
+		gpio_charger->wakeup_enabled =
+			enable_irq_wake(gpio_charger->irq);
+
+	return 0;
+}
+
 static int gpio_charger_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct gpio_charger *gpio_charger = platform_get_drvdata(pdev);
 
+	if (gpio_charger->wakeup_enabled)
+		disable_irq_wake(gpio_charger->irq);
 	power_supply_changed(&gpio_charger->charger);
 
 	return 0;
 }
 #endif
 
-static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops, NULL, gpio_charger_resume);
+static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops,
+		gpio_charger_suspend, gpio_charger_resume);
 
 static struct platform_driver gpio_charger_driver = {
 	.probe = gpio_charger_probe,
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index 1bb3a91b1acc..80edb7d8cb54 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -29,6 +29,8 @@
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
 
 #include <linux/usb/otg.h>
 #include <linux/usb/ulpi.h>
@@ -88,6 +90,8 @@ static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)
 
 	if (board && board->set_power)
 		board->set_power(on);
+	else if (board)
+		gpio_set_value(board->enable_gpio, on);
 }
 
 /*
@@ -400,12 +404,47 @@ static int isp1704_charger_probe(struct platform_device *pdev)
 	struct isp1704_charger	*isp;
 	int			ret = -ENODEV;
 
+	struct isp1704_charger_data *pdata = dev_get_platdata(&pdev->dev);
+	struct device_node *np = pdev->dev.of_node;
+
+	if (np) {
+		int gpio = of_get_named_gpio(np, "nxp,enable-gpio", 0);
+
+		if (gpio < 0)
+			return gpio;
+
+		pdata = devm_kzalloc(&pdev->dev,
+			sizeof(struct isp1704_charger_data), GFP_KERNEL);
+		pdata->enable_gpio = gpio;
+
+		dev_info(&pdev->dev, "init gpio %d\n", pdata->enable_gpio);
+
+		ret = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
+					GPIOF_OUT_INIT_HIGH, "isp1704_reset");
+		if (ret)
+			goto fail0;
+	}
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "missing platform data!\n");
+		return -ENODEV;
+	}
+
+
 	isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
 	if (!isp)
 		return -ENOMEM;
 
-	isp->phy = usb_get_phy(USB_PHY_TYPE_USB2);
-	if (IS_ERR_OR_NULL(isp->phy))
+	if (np)
+		isp->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
+	else
+		isp->phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
+
+	if (IS_ERR(isp->phy)) {
+		ret = PTR_ERR(isp->phy);
+		goto fail0;
+	}
+	if (!isp->phy)
 		goto fail0;
 
 	isp->dev = &pdev->dev;
@@ -464,7 +503,6 @@ fail2:
 	power_supply_unregister(&isp->psy);
 fail1:
 	isp1704_charger_set_power(isp, 0);
-	usb_put_phy(isp->phy);
 fail0:
 	dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret);
 
@@ -477,15 +515,23 @@ static int isp1704_charger_remove(struct platform_device *pdev)
 
 	usb_unregister_notifier(isp->phy, &isp->nb);
 	power_supply_unregister(&isp->psy);
-	usb_put_phy(isp->phy);
 	isp1704_charger_set_power(isp, 0);
 
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id omap_isp1704_of_match[] = {
+	{ .compatible = "nxp,isp1704", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, omap_isp1704_of_match);
+#endif
+
 static struct platform_driver isp1704_charger_driver = {
 	.driver = {
 		.name = "isp1704_charger",
+		.of_match_table = of_match_ptr(omap_isp1704_of_match),
 	},
 	.probe = isp1704_charger_probe,
 	.remove = isp1704_charger_remove,
diff --git a/drivers/power/max14577_charger.c b/drivers/power/max14577_charger.c
new file mode 100644
index 000000000000..fad2a75b3604
--- /dev/null
+++ b/drivers/power/max14577_charger.c
@@ -0,0 +1,311 @@
+/*
+ * Battery charger driver for the Maxim 14577
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Krzysztof Kozlowski <k.kozlowski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/mfd/max14577-private.h>
+
+struct max14577_charger {
+	struct device *dev;
+	struct max14577	*max14577;
+	struct power_supply	charger;
+
+	unsigned int	charging_state;
+	unsigned int	battery_state;
+};
+
+static int max14577_get_charger_state(struct max14577_charger *chg)
+{
+	struct regmap *rmap = chg->max14577->regmap;
+	int state = POWER_SUPPLY_STATUS_DISCHARGING;
+	u8 reg_data;
+
+	/*
+	 * Charging occurs only if:
+	 *  - CHGCTRL2/MBCHOSTEN == 1
+	 *  - STATUS2/CGMBC == 1
+	 *
+	 * TODO:
+	 *  - handle FULL after Top-off timer (EOC register may be off
+	 *    and the charger won't be charging although MBCHOSTEN is on)
+	 *  - handle properly dead-battery charging (respect timer)
+	 *  - handle timers (fast-charge and prequal) /MBCCHGERR/
+	 */
+	max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
+	if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
+		goto state_set;
+
+	max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+	if (reg_data & STATUS3_CGMBC_MASK) {
+		/* Charger or USB-cable is connected */
+		if (reg_data & STATUS3_EOC_MASK)
+			state = POWER_SUPPLY_STATUS_FULL;
+		else
+			state = POWER_SUPPLY_STATUS_CHARGING;
+		goto state_set;
+	}
+
+state_set:
+	chg->charging_state = state;
+	return state;
+}
+
+/*
+ * Supported charge types:
+ *  - POWER_SUPPLY_CHARGE_TYPE_NONE
+ *  - POWER_SUPPLY_CHARGE_TYPE_FAST
+ */
+static int max14577_get_charge_type(struct max14577_charger *chg)
+{
+	/*
+	 * TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
+	 * As spec says:
+	 * [after reaching EOC interrupt]
+	 * "When the battery is fully charged, the 30-minute (typ)
+	 *  top-off timer starts. The device continues to trickle
+	 *  charge the battery until the top-off timer runs out."
+	 */
+	if (max14577_get_charger_state(chg) == POWER_SUPPLY_STATUS_CHARGING)
+		return POWER_SUPPLY_CHARGE_TYPE_FAST;
+	return POWER_SUPPLY_CHARGE_TYPE_NONE;
+}
+
+static int max14577_get_online(struct max14577_charger *chg)
+{
+	struct regmap *rmap = chg->max14577->regmap;
+	u8 reg_data;
+
+	max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+	reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
+	switch (reg_data) {
+	case MAX14577_CHARGER_TYPE_USB:
+	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
+	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
+	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
+	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
+		return 1;
+	case MAX14577_CHARGER_TYPE_NONE:
+	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
+	case MAX14577_CHARGER_TYPE_RESERVED:
+	default:
+		return 0;
+	}
+}
+
+/*
+ * Supported health statuses:
+ *  - POWER_SUPPLY_HEALTH_DEAD
+ *  - POWER_SUPPLY_HEALTH_OVERVOLTAGE
+ *  - POWER_SUPPLY_HEALTH_GOOD
+ */
+static int max14577_get_battery_health(struct max14577_charger *chg)
+{
+	struct regmap *rmap = chg->max14577->regmap;
+	int state = POWER_SUPPLY_HEALTH_GOOD;
+	u8 reg_data;
+
+	max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+	reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
+	if (reg_data == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
+		state = POWER_SUPPLY_HEALTH_DEAD;
+		goto state_set;
+	}
+
+	max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+	if (reg_data & STATUS3_OVP_MASK) {
+		state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		goto state_set;
+	}
+
+state_set:
+	chg->battery_state = state;
+	return state;
+}
+
+/*
+ * Always returns 1.
+ * The max14577 chip doesn't report any status of battery presence.
+ * Lets assume that it will always be used with some battery.
+ */
+static int max14577_get_present(struct max14577_charger *chg)
+{
+	return 1;
+}
+
+/*
+ * Sets charger registers to proper and safe default values.
+ * Some of these values are equal to defaults in MAX14577E
+ * data sheet but there are minor differences.
+ */
+static void max14577_charger_reg_init(struct max14577_charger *chg)
+{
+	struct regmap *rmap = chg->max14577->regmap;
+	u8 reg_data;
+
+	/*
+	 * Charger-Type Manual Detection, default off (set CHGTYPMAN to 0)
+	 * Charger-Detection Enable, default on (set CHGDETEN to 1)
+	 * Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit
+	 */
+	reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT;
+	max14577_update_reg(rmap, MAX14577_REG_CDETCTRL1,
+			CDETCTRL1_CHGDETEN_MASK | CDETCTRL1_CHGTYPMAN_MASK,
+			reg_data);
+
+	/* Battery Fast-Charge Timer, from SM-V700: 6hrs */
+	reg_data = 0x3 << CHGCTRL1_TCHW_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL1, reg_data);
+
+	/*
+	 * Wall-Adapter Rapid Charge, default on
+	 * Battery-Charger, default on
+	 */
+	reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT;
+	reg_data |= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL2, reg_data);
+
+	/* Battery-Charger Constant Voltage (CV) Mode, from SM-V700: 4.35V */
+	reg_data = 0xf << CHGCTRL3_MBCCVWRC_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL3, reg_data);
+
+	/*
+	 * Fast Battery-Charge Current Low, default 200-950mA
+	 * Fast Battery-Charge Current High, from SM-V700: 450mA
+	 */
+	reg_data = 0x1 << CHGCTRL4_MBCICHWRCL_SHIFT;
+	reg_data |= 0x5 << CHGCTRL4_MBCICHWRCH_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL4, reg_data);
+
+	/* End-of-Charge Current, from SM-V700: 50mA */
+	reg_data = 0x0 << CHGCTRL5_EOCS_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL5, reg_data);
+
+	/* Auto Charging Stop, default off */
+	reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL6, reg_data);
+
+	/* Overvoltage-Protection Threshold, from SM-V700: 6.5V */
+	reg_data = 0x2 << CHGCTRL7_OTPCGHCVS_SHIFT;
+	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL7, reg_data);
+}
+
+/* Support property from charger */
+static enum power_supply_property max14577_charger_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static const char *model_name = "MAX14577";
+static const char *manufacturer = "Maxim Integrated";
+
+static int max14577_charger_get_property(struct power_supply *psy,
+			    enum power_supply_property psp,
+			    union power_supply_propval *val)
+{
+	struct max14577_charger *chg = container_of(psy,
+						  struct max14577_charger,
+						  charger);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = max14577_get_charger_state(chg);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		val->intval = max14577_get_charge_type(chg);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		val->intval = max14577_get_battery_health(chg);
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = max14577_get_present(chg);
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = max14577_get_online(chg);
+		break;
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = model_name;
+		break;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = manufacturer;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static int max14577_charger_probe(struct platform_device *pdev)
+{
+	struct max14577_charger *chg;
+	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
+	int ret;
+
+	chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
+	if (!chg)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, chg);
+	chg->dev = &pdev->dev;
+	chg->max14577 = max14577;
+
+	max14577_charger_reg_init(chg);
+
+	chg->charger.name = "max14577-charger",
+	chg->charger.type = POWER_SUPPLY_TYPE_BATTERY,
+	chg->charger.properties = max14577_charger_props,
+	chg->charger.num_properties = ARRAY_SIZE(max14577_charger_props),
+	chg->charger.get_property = max14577_charger_get_property,
+
+	ret = power_supply_register(&pdev->dev, &chg->charger);
+	if (ret) {
+		dev_err(&pdev->dev, "failed: power supply register\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int max14577_charger_remove(struct platform_device *pdev)
+{
+	struct max14577_charger *chg = platform_get_drvdata(pdev);
+
+	power_supply_unregister(&chg->charger);
+
+	return 0;
+}
+
+static struct platform_driver max14577_charger_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "max14577-charger",
+	},
+	.probe		= max14577_charger_probe,
+	.remove		= max14577_charger_remove,
+};
+module_platform_driver(max14577_charger_driver);
+
+MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>");
+MODULE_DESCRIPTION("MAXIM 14577 charger driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index e0b22f9b6fdd..66da691c41cf 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -741,9 +741,9 @@ static int max17042_probe(struct i2c_client *client,
 
 	if (client->irq) {
 		ret = request_threaded_irq(client->irq, NULL,
-						max17042_thread_handler,
-						IRQF_TRIGGER_FALLING,
-						chip->battery.name, chip);
+					max17042_thread_handler,
+					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					chip->battery.name, chip);
 		if (!ret) {
 			regmap_read(chip->regmap, MAX17042_CONFIG, &val);
 			val |= CONFIG_ALRT_BIT_ENBL;
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 557af943b2f5..26606641fe44 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/device.h>
+#include <linux/notifier.h>
 #include <linux/err.h>
 #include <linux/power_supply.h>
 #include <linux/thermal.h>
@@ -24,6 +25,9 @@
 struct class *power_supply_class;
 EXPORT_SYMBOL_GPL(power_supply_class);
 
+ATOMIC_NOTIFIER_HEAD(power_supply_notifier);
+EXPORT_SYMBOL_GPL(power_supply_notifier);
+
 static struct device_type power_supply_dev_type;
 
 static bool __power_supply_is_supplied_by(struct power_supply *supplier,
@@ -80,6 +84,8 @@ static void power_supply_changed_work(struct work_struct *work)
 		class_for_each_device(power_supply_class, NULL, psy,
 				      __power_supply_changed_work);
 		power_supply_update_leds(psy);
+		atomic_notifier_call_chain(&power_supply_notifier,
+				PSY_EVENT_PROP_CHANGED, psy);
 		kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE);
 		spin_lock_irqsave(&psy->changed_lock, flags);
 	}
@@ -335,6 +341,32 @@ struct power_supply *power_supply_get_by_name(const char *name)
 }
 EXPORT_SYMBOL_GPL(power_supply_get_by_name);
 
+#ifdef CONFIG_OF
+static int power_supply_match_device_node(struct device *dev, const void *data)
+{
+	return dev->parent && dev->parent->of_node == data;
+}
+
+struct power_supply *power_supply_get_by_phandle(struct device_node *np,
+							const char *property)
+{
+	struct device_node *power_supply_np;
+	struct device *dev;
+
+	power_supply_np = of_parse_phandle(np, property, 0);
+	if (!power_supply_np)
+		return ERR_PTR(-ENODEV);
+
+	dev = class_find_device(power_supply_class, NULL, power_supply_np,
+						power_supply_match_device_node);
+
+	of_node_put(power_supply_np);
+
+	return dev ? dev_get_drvdata(dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
+#endif /* CONFIG_OF */
+
 int power_supply_powers(struct power_supply *psy, struct device *dev)
 {
 	return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");
@@ -347,6 +379,18 @@ static void power_supply_dev_release(struct device *dev)
 	kfree(dev);
 }
 
+int power_supply_reg_notifier(struct notifier_block *nb)
+{
+	return atomic_notifier_chain_register(&power_supply_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(power_supply_reg_notifier);
+
+void power_supply_unreg_notifier(struct notifier_block *nb)
+{
+	atomic_notifier_chain_unregister(&power_supply_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(power_supply_unreg_notifier);
+
 #ifdef CONFIG_THERMAL
 static int power_supply_read_temp(struct thermal_zone_device *tzd,
 		unsigned long *temp)
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index 9b3ea535b472..6d452a78b19c 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -6,6 +6,12 @@ menuconfig POWER_RESET
 
 	  Say Y here to enable board reset and power off
 
+config POWER_RESET_AS3722
+	bool "ams AS3722 power-off driver"
+	depends on MFD_AS3722 && POWER_RESET
+	help
+	  This driver supports turning off board via a ams AS3722 power-off.
+
 config POWER_RESET_GPIO
 	bool "GPIO power-off driver"
 	depends on OF_GPIO && POWER_RESET
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index 3e6ed88725ac..a5b4a77d1a41 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
 obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
 obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
 obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
diff --git a/drivers/power/reset/as3722-poweroff.c b/drivers/power/reset/as3722-poweroff.c
new file mode 100644
index 000000000000..684971199bd3
--- /dev/null
+++ b/drivers/power/reset/as3722-poweroff.c
@@ -0,0 +1,96 @@
+/*
+ * Power off driver for ams AS3722 device.
+ *
+ * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/mfd/as3722.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct as3722_poweroff {
+	struct device *dev;
+	struct as3722 *as3722;
+};
+
+static struct as3722_poweroff *as3722_pm_poweroff;
+
+static void as3722_pm_power_off(void)
+{
+	int ret;
+
+	if (!as3722_pm_poweroff) {
+		pr_err("AS3722 poweroff is not initialised\n");
+		return;
+	}
+
+	ret = as3722_update_bits(as3722_pm_poweroff->as3722,
+		AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF);
+	if (ret < 0)
+		dev_err(as3722_pm_poweroff->dev,
+			"RESET_CONTROL_REG update failed, %d\n", ret);
+}
+
+static int as3722_poweroff_probe(struct platform_device *pdev)
+{
+	struct as3722_poweroff *as3722_poweroff;
+	struct device_node *np = pdev->dev.parent->of_node;
+
+	if (!np)
+		return -EINVAL;
+
+	if (!of_property_read_bool(np, "ams,system-power-controller"))
+		return 0;
+
+	as3722_poweroff = devm_kzalloc(&pdev->dev, sizeof(*as3722_poweroff),
+				GFP_KERNEL);
+	if (!as3722_poweroff)
+		return -ENOMEM;
+
+	as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent);
+	as3722_poweroff->dev = &pdev->dev;
+	as3722_pm_poweroff = as3722_poweroff;
+	if (!pm_power_off)
+		pm_power_off = as3722_pm_power_off;
+
+	return 0;
+}
+
+static int as3722_poweroff_remove(struct platform_device *pdev)
+{
+	if (pm_power_off == as3722_pm_power_off)
+		pm_power_off = NULL;
+	as3722_pm_poweroff = NULL;
+
+	return 0;
+}
+
+static struct platform_driver as3722_poweroff_driver = {
+	.driver = {
+		.name = "as3722-power-off",
+		.owner = THIS_MODULE,
+	},
+	.probe = as3722_poweroff_probe,
+	.remove = as3722_poweroff_remove,
+};
+
+module_platform_driver(as3722_poweroff_driver);
+
+MODULE_DESCRIPTION("Power off driver for ams AS3722 PMIC Device");
+MODULE_ALIAS("platform:as3722-power-off");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL v2");