Merge git://git.infradead.org/battery-2.6

* git://git.infradead.org/battery-2.6: (68 commits)
  power_supply: Mark da9052 driver as broken
  power_supply: Drop usage of nowarn variant of sysfs_create_link()
  s3c_adc_battery: Average over more than one adc sample
  power_supply: Add DA9052 battery driver
  isp1704_charger: Fix missing check
  jz4740-battery: Fix signedness bug
  power_supply: Assume mains power by default
  sbs-battery: Fix devicetree match table
  ARM: rx51: Add bq27200 i2c board info
  sbs-battery: Change power supply name
  devicetree-bindings: Propagate bq20z75->sbs rename to dt bindings
  devicetree-bindings: Add vendor entry for Smart Battery Systems
  sbs-battery: Rename internals to new name
  bq20z75: Rename to sbs-battery
  wm97xx_battery: Use DEFINE_MUTEX() for work_lock
  max8997_charger: Remove duplicate module.h
  lp8727_charger: Some minor fixes for the header
  lp8727_charger: Add header file
  power_supply: Convert drivers/power/* to use module_platform_driver()
  power_supply: Add "unknown" in power supply type
  ...

32 files changed, 3034 insertions, 710 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 9f88641..3a8daf8 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -116,12 +116,12 @@ config BATTERY_WM97XX
 	help
 	  Say Y to enable support for battery measured by WM97xx aux port.
 
-config BATTERY_BQ20Z75
-        tristate "TI BQ20z75 gas gauge"
+config BATTERY_SBS
+        tristate "SBS Compliant gas gauge"
         depends on I2C
         help
-         Say Y to include support for TI BQ20z75 SBS-compliant
-         gas gauge and protection IC.
+	  Say Y to include support for SBS battery driver for SBS-compliant
+	  gas gauges.
 
 config BATTERY_BQ27x00
 	tristate "BQ27x00 battery driver"
@@ -150,6 +150,14 @@ config BATTERY_DA9030
 	  Say Y here to enable support for batteries charger integrated into
 	  DA9030 PMIC.
 
+config BATTERY_DA9052
+	tristate "Dialog DA9052 Battery"
+	depends on PMIC_DA9052
+	depends on BROKEN
+	help
+	  Say Y here to enable support for batteries charger integrated into
+	  DA9052 PMIC.
+
 config BATTERY_MAX17040
 	tristate "Maxim MAX17040 Fuel Gauge"
 	depends on I2C
@@ -226,6 +234,12 @@ config CHARGER_TWL4030
 	help
 	  Say Y here to enable support for TWL4030 Battery Charge Interface.
 
+config CHARGER_LP8727
+	tristate "National Semiconductor LP8727 charger driver"
+	depends on I2C
+	help
+	  Say Y here to enable support for LP8727 Charger Driver.
+
 config CHARGER_GPIO
 	tristate "GPIO charger"
 	depends on GPIOLIB
@@ -236,6 +250,16 @@ config CHARGER_GPIO
 	  This driver can be build as a module. If so, the module will be
 	  called gpio-charger.
 
+config CHARGER_MANAGER
+	bool "Battery charger manager for multiple chargers"
+	depends on REGULATOR && RTC_CLASS
+	help
+          Say Y to enable charger-manager support, which allows multiple
+          chargers attached to a battery and multiple batteries attached to a
+          system. The charger-manager also can monitor charging status in
+          runtime and in suspend-to-RAM by waking up the system periodically
+          with help of suspend_again support.
+
 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 b4af13d..e429008 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -22,9 +22,10 @@ obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o
 obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
 obj-$(CONFIG_BATTERY_COLLIE)	+= collie_battery.o
 obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o
-obj-$(CONFIG_BATTERY_BQ20Z75)	+= bq20z75.o
+obj-$(CONFIG_BATTERY_SBS)	+= sbs-battery.o
 obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o
 obj-$(CONFIG_BATTERY_DA9030)	+= da9030_battery.o
+obj-$(CONFIG_BATTERY_DA9052)	+= da9052-battery.o
 obj-$(CONFIG_BATTERY_MAX17040)	+= max17040_battery.o
 obj-$(CONFIG_BATTERY_MAX17042)	+= max17042_battery.o
 obj-$(CONFIG_BATTERY_Z2)	+= z2_battery.o
@@ -35,6 +36,8 @@ obj-$(CONFIG_BATTERY_INTEL_MID)	+= intel_mid_battery.o
 obj-$(CONFIG_CHARGER_ISP1704)	+= isp1704_charger.o
 obj-$(CONFIG_CHARGER_MAX8903)	+= max8903_charger.o
 obj-$(CONFIG_CHARGER_TWL4030)	+= twl4030_charger.o
+obj-$(CONFIG_CHARGER_LP8727)	+= lp8727_charger.o
 obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o
+obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index bb16f5b..98bf567 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -54,13 +54,19 @@
 
 #define BQ27000_REG_RSOC		0x0B /* Relative State-of-Charge */
 #define BQ27000_REG_ILMD		0x76 /* Initial last measured discharge */
-#define BQ27000_FLAG_CHGS		BIT(7)
+#define BQ27000_FLAG_EDVF		BIT(0) /* Final End-of-Discharge-Voltage flag */
+#define BQ27000_FLAG_EDV1		BIT(1) /* First End-of-Discharge-Voltage flag */
+#define BQ27000_FLAG_CI			BIT(4) /* Capacity Inaccurate flag */
 #define BQ27000_FLAG_FC			BIT(5)
+#define BQ27000_FLAG_CHGS		BIT(7) /* Charge state flag */
 
 #define BQ27500_REG_SOC			0x2C
 #define BQ27500_REG_DCAP		0x3C /* Design capacity */
-#define BQ27500_FLAG_DSC		BIT(0)
-#define BQ27500_FLAG_FC			BIT(9)
+#define BQ27500_FLAG_DSG		BIT(0) /* Discharging */
+#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_CHG		BIT(8) /* Charging */
+#define BQ27500_FLAG_FC			BIT(9) /* Fully charged */
 
 #define BQ27000_RS			20 /* Resistor sense */
 
@@ -79,9 +85,8 @@ struct bq27x00_reg_cache {
 	int charge_full;
 	int cycle_count;
 	int capacity;
+	int energy;
 	int flags;
-
-	int current_now;
 };
 
 struct bq27x00_device_info {
@@ -108,6 +113,7 @@ static enum power_supply_property bq27x00_battery_props[] = {
 	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_TIME_TO_EMPTY_NOW,
 	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
@@ -149,7 +155,7 @@ static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
 		rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true);
 
 	if (rsoc < 0)
-		dev_err(di->dev, "error reading relative State-of-Charge\n");
+		dev_dbg(di->dev, "error reading relative State-of-Charge\n");
 
 	return rsoc;
 }
@@ -164,7 +170,8 @@ static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg)
 
 	charge = bq27x00_read(di, reg, false);
 	if (charge < 0) {
-		dev_err(di->dev, "error reading nominal available capacity\n");
+		dev_dbg(di->dev, "error reading charge register %02x: %d\n",
+			reg, charge);
 		return charge;
 	}
 
@@ -208,7 +215,7 @@ static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
 		ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);
 
 	if (ilmd < 0) {
-		dev_err(di->dev, "error reading initial last measured discharge\n");
+		dev_dbg(di->dev, "error reading initial last measured discharge\n");
 		return ilmd;
 	}
 
@@ -221,6 +228,50 @@ static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
 }
 
 /*
+ * Return the battery Available energy in µWh
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
+{
+	int ae;
+
+	ae = bq27x00_read(di, BQ27x00_REG_AE, false);
+	if (ae < 0) {
+		dev_dbg(di->dev, "error reading available energy\n");
+		return ae;
+	}
+
+	if (di->chip == BQ27500)
+		ae *= 1000;
+	else
+		ae = ae * 29200 / BQ27000_RS;
+
+	return ae;
+}
+
+/*
+ * Return the battery temperature in tenths of degree Celsius
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
+{
+	int temp;
+
+	temp = bq27x00_read(di, BQ27x00_REG_TEMP, false);
+	if (temp < 0) {
+		dev_err(di->dev, "error reading temperature\n");
+		return temp;
+	}
+
+	if (di->chip == BQ27500)
+		temp -= 2731;
+	else
+		temp = ((temp * 5) - 5463) / 2;
+
+	return temp;
+}
+
+/*
  * Return the battery Cycle count total
  * Or < 0 if something fails.
  */
@@ -245,7 +296,8 @@ static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg)
 
 	tval = bq27x00_read(di, reg, false);
 	if (tval < 0) {
-		dev_err(di->dev, "error reading register %02x: %d\n", reg, tval);
+		dev_dbg(di->dev, "error reading time register %02x: %d\n",
+			reg, tval);
 		return tval;
 	}
 
@@ -262,25 +314,31 @@ static void bq27x00_update(struct bq27x00_device_info *di)
 
 	cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, is_bq27500);
 	if (cache.flags >= 0) {
-		cache.capacity = bq27x00_battery_read_rsoc(di);
-		cache.temperature = bq27x00_read(di, BQ27x00_REG_TEMP, false);
-		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);
+		if (!is_bq27500 && (cache.flags & BQ27000_FLAG_CI)) {
+			dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n");
+			cache.capacity = -ENODATA;
+			cache.energy = -ENODATA;
+			cache.time_to_empty = -ENODATA;
+			cache.time_to_empty_avg = -ENODATA;
+			cache.time_to_full = -ENODATA;
+			cache.charge_full = -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);
+			cache.charge_full = bq27x00_battery_read_lmd(di);
+		}
+		cache.temperature = bq27x00_battery_read_temperature(di);
 		cache.cycle_count = bq27x00_battery_read_cyct(di);
 
-		if (!is_bq27500)
-			cache.current_now = bq27x00_read(di, BQ27x00_REG_AI, false);
-
 		/* We only have to read charge design full once */
 		if (di->charge_design_full <= 0)
 			di->charge_design_full = bq27x00_battery_read_ilmd(di);
 	}
 
-	/* Ignore current_now which is a snapshot of the current battery state
-	 * and is likely to be different even between two consecutive reads */
-	if (memcmp(&di->cache, &cache, sizeof(cache) - sizeof(int)) != 0) {
+	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) {
 		di->cache = cache;
 		power_supply_changed(&di->bat);
 	}
@@ -302,25 +360,6 @@ static void bq27x00_battery_poll(struct work_struct *work)
 	}
 }
 
-
-/*
- * Return the battery temperature in tenths of degree Celsius
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_temperature(struct bq27x00_device_info *di,
-	union power_supply_propval *val)
-{
-	if (di->cache.temperature < 0)
-		return di->cache.temperature;
-
-	if (di->chip == BQ27500)
-		val->intval = di->cache.temperature - 2731;
-	else
-		val->intval = ((di->cache.temperature * 5) - 5463) / 2;
-
-	return 0;
-}
-
 /*
  * Return the battery average current in µA
  * Note that current can be negative signed as well
@@ -330,20 +369,20 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di,
 	union power_supply_propval *val)
 {
 	int curr;
+	int flags;
 
-	if (di->chip == BQ27500)
-	    curr = bq27x00_read(di, BQ27x00_REG_AI, false);
-	else
-	    curr = di->cache.current_now;
-
-	if (curr < 0)
+	curr = bq27x00_read(di, BQ27x00_REG_AI, false);
+	if (curr < 0) {
+		dev_err(di->dev, "error reading current\n");
 		return curr;
+	}
 
 	if (di->chip == BQ27500) {
 		/* bq27500 returns signed value */
 		val->intval = (int)((s16)curr) * 1000;
 	} else {
-		if (di->cache.flags & BQ27000_FLAG_CHGS) {
+		flags = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
+		if (flags & BQ27000_FLAG_CHGS) {
 			dev_dbg(di->dev, "negative current!\n");
 			curr = -curr;
 		}
@@ -362,10 +401,14 @@ static int bq27x00_battery_status(struct bq27x00_device_info *di,
 	if (di->chip == BQ27500) {
 		if (di->cache.flags & BQ27500_FLAG_FC)
 			status = POWER_SUPPLY_STATUS_FULL;
-		else if (di->cache.flags & BQ27500_FLAG_DSC)
+		else if (di->cache.flags & BQ27500_FLAG_DSG)
 			status = POWER_SUPPLY_STATUS_DISCHARGING;
-		else
+		else if (di->cache.flags & BQ27500_FLAG_CHG)
 			status = POWER_SUPPLY_STATUS_CHARGING;
+		else if (power_supply_am_i_supplied(&di->bat))
+			status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		else
+			status = POWER_SUPPLY_STATUS_UNKNOWN;
 	} else {
 		if (di->cache.flags & BQ27000_FLAG_FC)
 			status = POWER_SUPPLY_STATUS_FULL;
@@ -382,50 +425,56 @@ static int bq27x00_battery_status(struct bq27x00_device_info *di,
 	return 0;
 }
 
-/*
- * Return the battery Voltage in milivolts
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
+static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di,
 	union power_supply_propval *val)
 {
-	int volt;
+	int level;
 
-	volt = bq27x00_read(di, BQ27x00_REG_VOLT, false);
-	if (volt < 0)
-		return volt;
+	if (di->chip == BQ27500) {
+		if (di->cache.flags & BQ27500_FLAG_FC)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+		else if (di->cache.flags & BQ27500_FLAG_SOC1)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+		else if (di->cache.flags & BQ27500_FLAG_SOCF)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+		else
+			level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+	} else {
+		if (di->cache.flags & BQ27000_FLAG_FC)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+		else if (di->cache.flags & BQ27000_FLAG_EDV1)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+		else if (di->cache.flags & BQ27000_FLAG_EDVF)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+		else
+			level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+	}
 
-	val->intval = volt * 1000;
+	val->intval = level;
 
 	return 0;
 }
 
 /*
- * Return the battery Available energy in µWh
+ * Return the battery Voltage in milivolts
  * Or < 0 if something fails.
  */
-static int bq27x00_battery_energy(struct bq27x00_device_info *di,
+static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
 	union power_supply_propval *val)
 {
-	int ae;
+	int volt;
 
-	ae = bq27x00_read(di, BQ27x00_REG_AE, false);
-	if (ae < 0) {
-		dev_err(di->dev, "error reading available energy\n");
-		return ae;
+	volt = bq27x00_read(di, BQ27x00_REG_VOLT, false);
+	if (volt < 0) {
+		dev_err(di->dev, "error reading voltage\n");
+		return volt;
 	}
 
-	if (di->chip == BQ27500)
-		ae *= 1000;
-	else
-		ae = ae * 29200 / BQ27000_RS;
-
-	val->intval = ae;
+	val->intval = volt * 1000;
 
 	return 0;
 }
 
-
 static int bq27x00_simple_value(int value,
 	union power_supply_propval *val)
 {
@@ -473,8 +522,11 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CAPACITY:
 		ret = bq27x00_simple_value(di->cache.capacity, val);
 		break;
+	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+		ret = bq27x00_battery_capacity_level(di, val);
+		break;
 	case POWER_SUPPLY_PROP_TEMP:
-		ret = bq27x00_battery_temperature(di, val);
+		ret = bq27x00_simple_value(di->cache.temperature, val);
 		break;
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
 		ret = bq27x00_simple_value(di->cache.time_to_empty, val);
@@ -501,7 +553,7 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
 		ret = bq27x00_simple_value(di->cache.cycle_count, val);
 		break;
 	case POWER_SUPPLY_PROP_ENERGY_NOW:
-		ret = bq27x00_battery_energy(di, val);
+		ret = bq27x00_simple_value(di->cache.energy, val);
 		break;
 	default:
 		return -EINVAL;
@@ -546,6 +598,14 @@ static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
 
 static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di)
 {
+	/*
+	 * power_supply_unregister call bq27x00_battery_get_property which
+	 * call bq27x00_battery_poll.
+	 * Make sure that bq27x00_battery_poll will not call
+	 * schedule_delayed_work again after unregister (which cause OOPS).
+	 */
+	poll_interval = 0;
+
 	cancel_delayed_work_sync(&di->work);
 
 	power_supply_unregister(&di->bat);
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
new file mode 100644
index 0000000..0378d01
--- /dev/null
+++ b/drivers/power/charger-manager.c
@@ -0,0 +1,1072 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * This driver enables to monitor battery health and control charger
+ * during suspend-to-mem.
+ * Charger manager depends on other devices. register this later than
+ * the depending devices.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+**/
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include <linux/power/charger-manager.h>
+#include <linux/regulator/consumer.h>
+
+/*
+ * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
+ * delayed works so that we can run delayed works with CM_JIFFIES_SMALL
+ * without any delays.
+ */
+#define	CM_JIFFIES_SMALL	(2)
+
+/* If y is valid (> 0) and smaller than x, do x = y */
+#define CM_MIN_VALID(x, y)	x = (((y > 0) && ((x) > (y))) ? (y) : (x))
+
+/*
+ * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking
+ * rtc alarm. It should be 2 or larger
+ */
+#define CM_RTC_SMALL		(2)
+
+#define UEVENT_BUF_SIZE		32
+
+static LIST_HEAD(cm_list);
+static DEFINE_MUTEX(cm_list_mtx);
+
+/* About in-suspend (suspend-again) monitoring */
+static struct rtc_device *rtc_dev;
+/*
+ * Backup RTC alarm
+ * Save the wakeup alarm before entering suspend-to-RAM
+ */
+static struct rtc_wkalrm rtc_wkalarm_save;
+/* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */
+static unsigned long rtc_wkalarm_save_time;
+static bool cm_suspended;
+static bool cm_rtc_set;
+static unsigned long cm_suspend_duration_ms;
+
+/* Global charger-manager description */
+static struct charger_global_desc *g_desc; /* init with setup_charger_manager */
+
+/**
+ * is_batt_present - See if the battery presents in place.
+ * @cm: the Charger Manager representing the battery.
+ */
+static bool is_batt_present(struct charger_manager *cm)
+{
+	union power_supply_propval val;
+	bool present = false;
+	int i, ret;
+
+	switch (cm->desc->battery_present) {
+	case CM_FUEL_GAUGE:
+		ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+				POWER_SUPPLY_PROP_PRESENT, &val);
+		if (ret == 0 && val.intval)
+			present = true;
+		break;
+	case CM_CHARGER_STAT:
+		for (i = 0; cm->charger_stat[i]; i++) {
+			ret = cm->charger_stat[i]->get_property(
+					cm->charger_stat[i],
+					POWER_SUPPLY_PROP_PRESENT, &val);
+			if (ret == 0 && val.intval) {
+				present = true;
+				break;
+			}
+		}
+		break;
+	}
+
+	return present;
+}
+
+/**
+ * is_ext_pwr_online - See if an external power source is attached to charge
+ * @cm: the Charger Manager representing the battery.
+ *
+ * Returns true if at least one of the chargers of the battery has an external
+ * power source attached to charge the battery regardless of whether it is
+ * actually charging or not.
+ */
+static bool is_ext_pwr_online(struct charger_manager *cm)
+{
+	union power_supply_propval val;
+	bool online = false;
+	int i, ret;
+
+	/* If at least one of them has one, it's yes. */
+	for (i = 0; cm->charger_stat[i]; i++) {
+		ret = cm->charger_stat[i]->get_property(
+				cm->charger_stat[i],
+				POWER_SUPPLY_PROP_ONLINE, &val);
+		if (ret == 0 && val.intval) {
+			online = true;
+			break;
+		}
+	}
+
+	return online;
+}
+
+/**
+ * get_batt_uV - Get the voltage level of the battery
+ * @cm: the Charger Manager representing the battery.
+ * @uV: the voltage level returned.
+ *
+ * Returns 0 if there is no error.
+ * Returns a negative value on error.
+ */
+static int get_batt_uV(struct charger_manager *cm, int *uV)
+{
+	union power_supply_propval val;
+	int ret;
+
+	if (cm->fuel_gauge)
+		ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+				POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
+	else
+		return -ENODEV;
+
+	if (ret)
+		return ret;
+
+	*uV = val.intval;
+	return 0;
+}
+
+/**
+ * is_charging - Returns true if the battery is being charged.
+ * @cm: the Charger Manager representing the battery.
+ */
+static bool is_charging(struct charger_manager *cm)
+{
+	int i, ret;
+	bool charging = false;
+	union power_supply_propval val;
+
+	/* If there is no battery, it cannot be charged */
+	if (!is_batt_present(cm))
+		return false;
+
+	/* If at least one of the charger is charging, return yes */
+	for (i = 0; cm->charger_stat[i]; i++) {
+		/* 1. The charger sholuld not be DISABLED */
+		if (cm->emergency_stop)
+			continue;
+		if (!cm->charger_enabled)
+			continue;
+
+		/* 2. The charger should be online (ext-power) */
+		ret = cm->charger_stat[i]->get_property(
+				cm->charger_stat[i],
+				POWER_SUPPLY_PROP_ONLINE, &val);
+		if (ret) {
+			dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n",
+					cm->desc->psy_charger_stat[i]);
+			continue;
+		}
+		if (val.intval == 0)
+			continue;
+
+		/*
+		 * 3. The charger should not be FULL, DISCHARGING,
+		 * or NOT_CHARGING.
+		 */
+		ret = cm->charger_stat[i]->get_property(
+				cm->charger_stat[i],
+				POWER_SUPPLY_PROP_STATUS, &val);
+		if (ret) {
+			dev_warn(cm->dev, "Cannot read STATUS value from %s.\n",
+					cm->desc->psy_charger_stat[i]);
+			continue;
+		}
+		if (val.intval == POWER_SUPPLY_STATUS_FULL ||
+				val.intval == POWER_SUPPLY_STATUS_DISCHARGING ||
+				val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING)
+			continue;
+
+		/* Then, this is charging. */
+		charging = true;
+		break;
+	}
+
+	return charging;
+}
+
+/**
+ * is_polling_required - Return true if need to continue polling for this CM.
+ * @cm: the Charger Manager representing the battery.
+ */
+static bool is_polling_required(struct charger_manager *cm)
+{
+	switch (cm->desc->polling_mode) {
+	case CM_POLL_DISABLE:
+		return false;
+	case CM_POLL_ALWAYS:
+		return true;
+	case CM_POLL_EXTERNAL_POWER_ONLY:
+		return is_ext_pwr_online(cm);
+	case CM_POLL_CHARGING_ONLY:
+		return is_charging(cm);
+	default:
+		dev_warn(cm->dev, "Incorrect polling_mode (%d)\n",
+			cm->desc->polling_mode);
+	}
+
+	return false;
+}
+
+/**
+ * try_charger_enable - Enable/Disable chargers altogether
+ * @cm: the Charger Manager representing the battery.
+ * @enable: true: enable / false: disable
+ *
+ * Note that Charger Manager keeps the charger enabled regardless whether
+ * the charger is charging or not (because battery is full or no external
+ * power source exists) except when CM needs to disable chargers forcibly
+ * bacause of emergency causes; when the battery is overheated or too cold.
+ */
+static int try_charger_enable(struct charger_manager *cm, bool enable)
+{
+	int err = 0, i;
+	struct charger_desc *desc = cm->desc;
+
+	/* Ignore if it's redundent command */
+	if (enable && cm->charger_enabled)
+		return 0;
+	if (!enable && !cm->charger_enabled)
+		return 0;
+
+	if (enable) {
+		if (cm->emergency_stop)
+			return -EAGAIN;
+		err = regulator_bulk_enable(desc->num_charger_regulators,
+					desc->charger_regulators);
+	} 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)) {
+				regulator_force_disable(
+					desc->charger_regulators[i].consumer);
+				dev_warn(cm->dev,
+					"Disable regulator(%s) forcibly.\n",
+					desc->charger_regulators[i].supply);
+			}
+		}
+	}
+
+	if (!err)
+		cm->charger_enabled = enable;
+
+	return err;
+}
+
+/**
+ * uevent_notify - Let users know something has changed.
+ * @cm: the Charger Manager representing the battery.
+ * @event: the event string.
+ *
+ * If @event is null, it implies that uevent_notify is called
+ * by resume function. When called in the resume function, cm_suspended
+ * should be already reset to false in order to let uevent_notify
+ * notify the recent event during the suspend to users. While
+ * suspended, uevent_notify does not notify users, but tracks
+ * events so that uevent_notify can notify users later after resumed.
+ */
+static void uevent_notify(struct charger_manager *cm, const char *event)
+{
+	static char env_str[UEVENT_BUF_SIZE + 1] = "";
+	static char env_str_save[UEVENT_BUF_SIZE + 1] = "";
+
+	if (cm_suspended) {
+		/* Nothing in suspended-event buffer */
+		if (env_str_save[0] == 0) {
+			if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
+				return; /* status not changed */
+			strncpy(env_str_save, event, UEVENT_BUF_SIZE);
+			return;
+		}
+
+		if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE))
+			return; /* Duplicated. */
+		else
+			strncpy(env_str_save, event, UEVENT_BUF_SIZE);
+
+		return;
+	}
+
+	if (event == NULL) {
+		/* No messages pending */
+		if (!env_str_save[0])
+			return;
+
+		strncpy(env_str, env_str_save, UEVENT_BUF_SIZE);
+		kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
+		env_str_save[0] = 0;
+
+		return;
+	}
+
+	/* status not changed */
+	if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
+		return;
+
+	/* save the status and notify the update */
+	strncpy(env_str, event, UEVENT_BUF_SIZE);
+	kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
+
+	dev_info(cm->dev, event);
+}
+
+/**
+ * _cm_monitor - Monitor the temperature and return true for exceptions.
+ * @cm: the Charger Manager representing the battery.
+ *
+ * Returns true if there is an event to notify for the battery.
+ * (True if the status of "emergency_stop" changes)
+ */
+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);
+
+	dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
+		cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
+
+	/* It has been stopped or charging already */
+	if (!!temp == !!cm->emergency_stop)
+		return false;
+
+	if (temp) {
+		cm->emergency_stop = temp;
+		if (!try_charger_enable(cm, false)) {
+			if (temp > 0)
+				uevent_notify(cm, "OVERHEAT");
+			else
+				uevent_notify(cm, "COLD");
+		}
+	} else {
+		cm->emergency_stop = 0;
+		if (!try_charger_enable(cm, true))
+			uevent_notify(cm, "CHARGING");
+	}
+
+	return true;
+}
+
+/**
+ * cm_monitor - Monitor every battery.
+ *
+ * Returns true if there is an event to notify from any of the batteries.
+ * (True if the status of "emergency_stop" changes)
+ */
+static bool cm_monitor(void)
+{
+	bool stop = false;
+	struct charger_manager *cm;
+
+	mutex_lock(&cm_list_mtx);
+
+	list_for_each_entry(cm, &cm_list, entry)
+		stop = stop || _cm_monitor(cm);
+
+	mutex_unlock(&cm_list_mtx);
+
+	return stop;
+}
+
+static int charger_get_property(struct power_supply *psy,
+		enum power_supply_property psp,
+		union power_supply_propval *val)
+{
+	struct charger_manager *cm = container_of(psy,
+			struct charger_manager, charger_psy);
+	struct charger_desc *desc = cm->desc;
+	int i, ret = 0, uV;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		if (is_charging(cm))
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else if (is_ext_pwr_online(cm))
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		else
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		if (cm->emergency_stop > 0)
+			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+		else if (cm->emergency_stop < 0)
+			val->intval = POWER_SUPPLY_HEALTH_COLD;
+		else
+			val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		if (is_batt_present(cm))
+			val->intval = 1;
+		else
+			val->intval = 0;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = get_batt_uV(cm, &i);
+		val->intval = i;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+				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;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		if (!cm->fuel_gauge) {
+			ret = -ENODEV;
+			break;
+		}
+
+		if (!is_batt_present(cm)) {
+			/* There is no battery. Assume 100% */
+			val->intval = 100;
+			break;
+		}
+
+		ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+					POWER_SUPPLY_PROP_CAPACITY, val);
+		if (ret)
+			break;
+
+		if (val->intval > 100) {
+			val->intval = 100;
+			break;
+		}
+		if (val->intval < 0)
+			val->intval = 0;
+
+		/* Do not adjust SOC when charging: voltage is overrated */
+		if (is_charging(cm))
+			break;
+
+		/*
+		 * If the capacity value is inconsistent, calibrate it base on
+		 * the battery voltage values and the thresholds given as desc
+		 */
+		ret = get_batt_uV(cm, &uV);
+		if (ret) {
+			/* Voltage information not available. No calibration */
+			ret = 0;
+			break;
+		}
+
+		if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
+		    !is_charging(cm)) {
+			val->intval = 100;
+			break;
+		}
+
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		if (is_ext_pwr_online(cm))
+			val->intval = 1;
+		else
+			val->intval = 0;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL:
+		if (cm->fuel_gauge) {
+			if (cm->fuel_gauge->get_property(cm->fuel_gauge,
+			    POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0)
+				break;
+		}
+
+		if (is_ext_pwr_online(cm)) {
+			/* Not full if it's charging. */
+			if (is_charging(cm)) {
+				val->intval = 0;
+				break;
+			}
+			/*
+			 * Full if it's powered but not charging andi
+			 * not forced stop by emergency
+			 */
+			if (!cm->emergency_stop) {
+				val->intval = 1;
+				break;
+			}
+		}
+
+		/* Full if it's over the fullbatt voltage */
+		ret = get_batt_uV(cm, &uV);
+		if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
+		    !is_charging(cm)) {
+			val->intval = 1;
+			break;
+		}
+
+		/* Full if the cap is 100 */
+		if (cm->fuel_gauge) {
+			ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+					POWER_SUPPLY_PROP_CAPACITY, val);
+			if (!ret && val->intval >= 100 && !is_charging(cm)) {
+				val->intval = 1;
+				break;
+			}
+		}
+
+		val->intval = 0;
+		ret = 0;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		if (is_charging(cm)) {
+			ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+						POWER_SUPPLY_PROP_CHARGE_NOW,
+						val);
+			if (ret) {
+				val->intval = 1;
+				ret = 0;
+			} else {
+				/* If CHARGE_NOW is supplied, use it */
+				val->intval = (val->intval > 0) ?
+						val->intval : 1;
+			}
+		} else {
+			val->intval = 0;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+	return ret;
+}
+
+#define NUM_CHARGER_PSY_OPTIONAL	(4)
+static enum power_supply_property default_charger_props[] = {
+	/* Guaranteed to provide */
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CHARGE_FULL,
+	/*
+	 * Optional properties are:
+	 * POWER_SUPPLY_PROP_CHARGE_NOW,
+	 * POWER_SUPPLY_PROP_CURRENT_NOW,
+	 * POWER_SUPPLY_PROP_TEMP, and
+	 * POWER_SUPPLY_PROP_TEMP_AMBIENT,
+	 */
+};
+
+static struct power_supply psy_default = {
+	.name = "battery",
+	.type = POWER_SUPPLY_TYPE_BATTERY,
+	.properties = default_charger_props,
+	.num_properties = ARRAY_SIZE(default_charger_props),
+	.get_property = charger_get_property,
+};
+
+/**
+ * cm_setup_timer - For in-suspend monitoring setup wakeup alarm
+ *		    for suspend_again.
+ *
+ * Returns true if the alarm is set for Charger Manager to use.
+ * Returns false if
+ *	cm_setup_timer fails to set an alarm,
+ *	cm_setup_timer does not need to set an alarm for Charger Manager,
+ *	or an alarm previously configured is to be used.
+ */
+static bool cm_setup_timer(void)
+{
+	struct charger_manager *cm;
+	unsigned int wakeup_ms = UINT_MAX;
+	bool ret = false;
+
+	mutex_lock(&cm_list_mtx);
+
+	list_for_each_entry(cm, &cm_list, entry) {
+		/* Skip if polling is not required for this CM */
+		if (!is_polling_required(cm) && !cm->emergency_stop)
+			continue;
+		if (cm->desc->polling_interval_ms == 0)
+			continue;
+		CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms);
+	}
+
+	mutex_unlock(&cm_list_mtx);
+
+	if (wakeup_ms < UINT_MAX && wakeup_ms > 0) {
+		pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms);
+		if (rtc_dev) {
+			struct rtc_wkalrm tmp;
+			unsigned long time, now;
+			unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000);
+
+			/*
+			 * Set alarm with the polling interval (wakeup_ms)
+			 * except when rtc_wkalarm_save comes first.
+			 * However, the alarm time should be NOW +
+			 * CM_RTC_SMALL or later.
+			 */
+			tmp.enabled = 1;
+			rtc_read_time(rtc_dev, &tmp.time);
+			rtc_tm_to_time(&tmp.time, &now);
+			if (add < CM_RTC_SMALL)
+				add = CM_RTC_SMALL;
+			time = now + add;
+
+			ret = true;
+
+			if (rtc_wkalarm_save.enabled &&
+			    rtc_wkalarm_save_time &&
+			    rtc_wkalarm_save_time < time) {
+				if (rtc_wkalarm_save_time < now + CM_RTC_SMALL)
+					time = now + CM_RTC_SMALL;
+				else
+					time = rtc_wkalarm_save_time;
+
+				/* The timer is not appointed by CM */
+				ret = false;
+			}
+
+			pr_info("Waking up after %lu secs.\n",
+					time - now);
+
+			rtc_time_to_tm(time, &tmp.time);
+			rtc_set_alarm(rtc_dev, &tmp);
+			cm_suspend_duration_ms += wakeup_ms;
+			return ret;
+		}
+	}
+
+	if (rtc_dev)
+		rtc_set_alarm(rtc_dev, &rtc_wkalarm_save);
+	return false;
+}
+
+/**
+ * cm_suspend_again - Determine whether suspend again or not
+ *
+ * Returns true if the system should be suspended again
+ * Returns false if the system should be woken up
+ */
+bool cm_suspend_again(void)
+{
+	struct charger_manager *cm;
+	bool ret = false;
+
+	if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() ||
+	    !cm_rtc_set)
+		return false;
+
+	if (cm_monitor())
+		goto out;
+
+	ret = true;
+	mutex_lock(&cm_list_mtx);
+	list_for_each_entry(cm, &cm_list, entry) {
+		if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) ||
+		    cm->status_save_batt != is_batt_present(cm))
+			ret = false;
+	}
+	mutex_unlock(&cm_list_mtx);
+
+	cm_rtc_set = cm_setup_timer();
+out:
+	/* It's about the time when the non-CM appointed timer goes off */
+	if (rtc_wkalarm_save.enabled) {
+		unsigned long now;
+		struct rtc_time tmp;
+
+		rtc_read_time(rtc_dev, &tmp);
+		rtc_tm_to_time(&tmp, &now);
+
+		if (rtc_wkalarm_save_time &&
+		    now + CM_RTC_SMALL >= rtc_wkalarm_save_time)
+			return false;
+	}
+	return ret;
+}
+EXPORT_SYMBOL_GPL(cm_suspend_again);
+
+/**
+ * setup_charger_manager - initialize charger_global_desc data
+ * @gd: pointer to instance of charger_global_desc
+ */
+int setup_charger_manager(struct charger_global_desc *gd)
+{
+	if (!gd)
+		return -EINVAL;
+
+	if (rtc_dev)
+		rtc_class_close(rtc_dev);
+	rtc_dev = NULL;
+	g_desc = NULL;
+
+	if (!gd->rtc_only_wakeup) {
+		pr_err("The callback rtc_only_wakeup is not given.\n");
+		return -EINVAL;
+	}
+
+	if (gd->rtc_name) {
+		rtc_dev = rtc_class_open(gd->rtc_name);
+		if (IS_ERR_OR_NULL(rtc_dev)) {
+			rtc_dev = NULL;
+			/* Retry at probe. RTC may be not registered yet */
+		}
+	} else {
+		pr_warn("No wakeup timer is given for charger manager."
+			"In-suspend monitoring won't work.\n");
+	}
+
+	g_desc = gd;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(setup_charger_manager);
+
+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;
+	union power_supply_propval val;
+
+	if (g_desc && !rtc_dev && g_desc->rtc_name) {
+		rtc_dev = rtc_class_open(g_desc->rtc_name);
+		if (IS_ERR_OR_NULL(rtc_dev)) {
+			rtc_dev = NULL;
+			dev_err(&pdev->dev, "Cannot get RTC %s.\n",
+				g_desc->rtc_name);
+			ret = -ENODEV;
+			goto err_alloc;
+		}
+	}
+
+	if (!desc) {
+		dev_err(&pdev->dev, "No platform data (desc) found.\n");
+		ret = -ENODEV;
+		goto err_alloc;
+	}
+
+	cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL);
+	if (!cm) {
+		dev_err(&pdev->dev, "Cannot allocate memory.\n");
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
+
+	/* Basic Values. Unspecified are Null or 0 */
+	cm->dev = &pdev->dev;
+	cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL);
+	if (!cm->desc) {
+		dev_err(&pdev->dev, "Cannot allocate memory.\n");
+		ret = -ENOMEM;
+		goto err_alloc_desc;
+	}
+	memcpy(cm->desc, desc, sizeof(struct charger_desc));
+	cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */
+
+	if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
+		ret = -EINVAL;
+		dev_err(&pdev->dev, "charger_regulators undefined.\n");
+		goto err_no_charger;
+	}
+
+	if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) {
+		dev_err(&pdev->dev, "No power supply defined.\n");
+		ret = -EINVAL;
+		goto err_no_charger_stat;
+	}
+
+	/* Counting index only */
+	while (desc->psy_charger_stat[i])
+		i++;
+
+	cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1),
+				   GFP_KERNEL);
+	if (!cm->charger_stat) {
+		ret = -ENOMEM;
+		goto err_no_charger_stat;
+	}
+
+	for (i = 0; desc->psy_charger_stat[i]; i++) {
+		cm->charger_stat[i] = power_supply_get_by_name(
+					desc->psy_charger_stat[i]);
+		if (!cm->charger_stat[i]) {
+			dev_err(&pdev->dev, "Cannot find power supply "
+					"\"%s\"\n",
+					desc->psy_charger_stat[i]);
+			ret = -ENODEV;
+			goto err_chg_stat;
+		}
+	}
+
+	cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge);
+	if (!cm->fuel_gauge) {
+		dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
+				desc->psy_fuel_gauge);
+		ret = -ENODEV;
+		goto err_chg_stat;
+	}
+
+	if (desc->polling_interval_ms == 0 ||
+	    msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) {
+		dev_err(&pdev->dev, "polling_interval_ms is too small\n");
+		ret = -EINVAL;
+		goto err_chg_stat;
+	}
+
+	if (!desc->temperature_out_of_range) {
+		dev_err(&pdev->dev, "there is no temperature_out_of_range\n");
+		ret = -EINVAL;
+		goto err_chg_stat;
+	}
+
+	platform_set_drvdata(pdev, cm);
+
+	memcpy(&cm->charger_psy, &psy_default,
+				sizeof(psy_default));
+	if (!desc->psy_name) {
+		strncpy(cm->psy_name_buf, psy_default.name,
+				PSY_NAME_MAX);
+	} else {
+		strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX);
+	}
+	cm->charger_psy.name = cm->psy_name_buf;
+
+	/* Allocate for psy properties because they may vary */
+	cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property)
+				* (ARRAY_SIZE(default_charger_props) +
+				NUM_CHARGER_PSY_OPTIONAL),
+				GFP_KERNEL);
+	if (!cm->charger_psy.properties) {
+		dev_err(&pdev->dev, "Cannot allocate for psy properties.\n");
+		ret = -ENOMEM;
+		goto err_chg_stat;
+	}
+	memcpy(cm->charger_psy.properties, default_charger_props,
+		sizeof(enum power_supply_property) *
+		ARRAY_SIZE(default_charger_props));
+	cm->charger_psy.num_properties = psy_default.num_properties;
+
+	/* Find which optional psy-properties are available */
+	if (!cm->fuel_gauge->get_property(cm->fuel_gauge,
+					  POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
+		cm->charger_psy.properties[cm->charger_psy.num_properties] =
+				POWER_SUPPLY_PROP_CHARGE_NOW;
+		cm->charger_psy.num_properties++;
+	}
+	if (!cm->fuel_gauge->get_property(cm->fuel_gauge,
+					  POWER_SUPPLY_PROP_CURRENT_NOW,
+					  &val)) {
+		cm->charger_psy.properties[cm->charger_psy.num_properties] =
+				POWER_SUPPLY_PROP_CURRENT_NOW;
+		cm->charger_psy.num_properties++;
+	}
+	if (!desc->measure_battery_temp) {
+		cm->charger_psy.properties[cm->charger_psy.num_properties] =
+				POWER_SUPPLY_PROP_TEMP_AMBIENT;
+		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++;
+	}
+
+	ret = power_supply_register(NULL, &cm->charger_psy);
+	if (ret) {
+		dev_err(&pdev->dev, "Cannot register charger-manager with"
+				" name \"%s\".\n", cm->charger_psy.name);
+		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;
+	}
+
+	ret = try_charger_enable(cm, true);
+	if (ret) {
+		dev_err(&pdev->dev, "Cannot enable charger regulators\n");
+		goto err_chg_enable;
+	}
+
+	/* Add to the list */
+	mutex_lock(&cm_list_mtx);
+	list_add(&cm->entry, &cm_list);
+	mutex_unlock(&cm_list_mtx);
+
+	return 0;
+
+err_chg_enable:
+	if (desc->charger_regulators)
+		regulator_bulk_free(desc->num_charger_regulators,
+					desc->charger_regulators);
+err_bulk_get:
+	power_supply_unregister(&cm->charger_psy);
+err_register:
+	kfree(cm->charger_psy.properties);
+err_chg_stat:
+	kfree(cm->charger_stat);
+err_no_charger_stat:
+err_no_charger:
+	kfree(cm->desc);
+err_alloc_desc:
+	kfree(cm);
+err_alloc:
+	return ret;
+}
+
+static int __devexit charger_manager_remove(struct platform_device *pdev)
+{
+	struct charger_manager *cm = platform_get_drvdata(pdev);
+	struct charger_desc *desc = cm->desc;
+
+	/* Remove from the list */
+	mutex_lock(&cm_list_mtx);
+	list_del(&cm->entry);
+	mutex_unlock(&cm_list_mtx);
+
+	if (desc->charger_regulators)
+		regulator_bulk_free(desc->num_charger_regulators,
+					desc->charger_regulators);
+
+	power_supply_unregister(&cm->charger_psy);
+	kfree(cm->charger_psy.properties);
+	kfree(cm->charger_stat);
+	kfree(cm->desc);
+	kfree(cm);
+
+	return 0;
+}
+
+const struct platform_device_id charger_manager_id[] = {
+	{ "charger-manager", 0 },
+	{ },
+};
+
+static int cm_suspend_prepare(struct device *dev)
+{
+	struct platform_device *pdev = container_of(dev, struct platform_device,
+						    dev);
+	struct charger_manager *cm = platform_get_drvdata(pdev);
+
+	if (!cm_suspended) {
+		if (rtc_dev) {
+			struct rtc_time tmp;
+			unsigned long now;
+
+			rtc_read_alarm(rtc_dev, &rtc_wkalarm_save);
+			rtc_read_time(rtc_dev, &tmp);
+
+			if (rtc_wkalarm_save.enabled) {
+				rtc_tm_to_time(&rtc_wkalarm_save.time,
+					       &rtc_wkalarm_save_time);
+				rtc_tm_to_time(&tmp, &now);
+				if (now > rtc_wkalarm_save_time)
+					rtc_wkalarm_save_time = 0;
+			} else {
+				rtc_wkalarm_save_time = 0;
+			}
+		}
+		cm_suspended = true;
+	}
+
+	cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm);
+	cm->status_save_batt = is_batt_present(cm);
+
+	if (!cm_rtc_set) {
+		cm_suspend_duration_ms = 0;
+		cm_rtc_set = cm_setup_timer();
+	}
+
+	return 0;
+}
+
+static void cm_suspend_complete(struct device *dev)
+{
+	struct platform_device *pdev = container_of(dev, struct platform_device,
+						    dev);
+	struct charger_manager *cm = platform_get_drvdata(pdev);
+
+	if (cm_suspended) {
+		if (rtc_dev) {
+			struct rtc_wkalrm tmp;
+
+			rtc_read_alarm(rtc_dev, &tmp);
+			rtc_wkalarm_save.pending = tmp.pending;
+			rtc_set_alarm(rtc_dev, &rtc_wkalarm_save);
+		}
+		cm_suspended = false;
+		cm_rtc_set = false;
+	}
+
+	uevent_notify(cm, NULL);
+}
+
+static const struct dev_pm_ops charger_manager_pm = {
+	.prepare	= cm_suspend_prepare,
+	.complete	= cm_suspend_complete,
+};
+
+static struct platform_driver charger_manager_driver = {
+	.driver = {
+		.name = "charger-manager",
+		.owner = THIS_MODULE,
+		.pm = &charger_manager_pm,
+	},
+	.probe = charger_manager_probe,
+	.remove = __devexit_p(charger_manager_remove),
+	.id_table = charger_manager_id,
+};
+
+static int __init charger_manager_init(void)
+{
+	return platform_driver_register(&charger_manager_driver);
+}
+late_initcall(charger_manager_init);
+
+static void __exit charger_manager_cleanup(void)
+{
+	platform_driver_unregister(&charger_manager_driver);
+}
+module_exit(charger_manager_cleanup);
+
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_DESCRIPTION("Charger Manager");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("charger-manager");
diff --git a/drivers/power/collie_battery.c b/drivers/power/collie_battery.c
index 548d263..74c6b23 100644
--- a/drivers/power/collie_battery.c
+++ b/drivers/power/collie_battery.c
@@ -146,7 +146,7 @@ static void collie_bat_external_power_changed(struct power_supply *psy)
 
 static irqreturn_t collie_bat_gpio_isr(int irq, void *data)
 {
-	pr_info("collie_bat_gpio irq: %d\n", gpio_get_value(irq_to_gpio(irq)));
+	pr_info("collie_bat_gpio irq\n");
 	schedule_work(&bat_work);
 	return IRQ_HANDLED;
 }
@@ -277,18 +277,13 @@ static struct collie_bat collie_bat_bu = {
 	.adc_temp_divider = -1,
 };
 
-static struct {
-	int gpio;
-	char *name;
-	bool output;
-	int value;
-} gpios[] = {
-	{ COLLIE_GPIO_CO,		"main battery full",	0, 0 },
-	{ COLLIE_GPIO_MAIN_BAT_LOW,	"main battery low",	0, 0 },
-	{ COLLIE_GPIO_CHARGE_ON,	"main charge on",	1, 0 },
-	{ COLLIE_GPIO_MBAT_ON,		"main battery",		1, 0 },
-	{ COLLIE_GPIO_TMP_ON,		"main battery temp",	1, 0 },
-	{ COLLIE_GPIO_BBAT_ON,		"backup battery",	1, 0 },
+static struct gpio collie_batt_gpios[] = {
+	{ COLLIE_GPIO_CO,	    GPIOF_IN,		"main battery full" },
+	{ COLLIE_GPIO_MAIN_BAT_LOW, GPIOF_IN,		"main battery low" },
+	{ COLLIE_GPIO_CHARGE_ON,    GPIOF_OUT_INIT_LOW,	"main charge on" },
+	{ COLLIE_GPIO_MBAT_ON,	    GPIOF_OUT_INIT_LOW,	"main battery" },
+	{ COLLIE_GPIO_TMP_ON,	    GPIOF_OUT_INIT_LOW,	"main battery temp" },
+	{ COLLIE_GPIO_BBAT_ON,	    GPIOF_OUT_INIT_LOW,	"backup battery" },
 };
 
 #ifdef CONFIG_PM
@@ -313,29 +308,16 @@ static int collie_bat_resume(struct ucb1x00_dev *dev)
 static int __devinit collie_bat_probe(struct ucb1x00_dev *dev)
 {
 	int ret;
-	int i;
 
 	if (!machine_is_collie())
 		return -ENODEV;
 
 	ucb = dev->ucb;
 
-	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
-		ret = gpio_request(gpios[i].gpio, gpios[i].name);
-		if (ret) {
-			i--;
-			goto err_gpio;
-		}
-
-		if (gpios[i].output)
-			ret = gpio_direction_output(gpios[i].gpio,
-					gpios[i].value);
-		else
-			ret = gpio_direction_input(gpios[i].gpio);
-
-		if (ret)
-			goto err_gpio;
-	}
+	ret = gpio_request_array(collie_batt_gpios,
+				 ARRAY_SIZE(collie_batt_gpios));
+	if (ret)
+		return ret;
 
 	mutex_init(&collie_bat_main.work_lock);
 
@@ -363,19 +345,12 @@ err_psy_reg_main:
 
 	/* see comment in collie_bat_remove */
 	cancel_work_sync(&bat_work);
-
-	i--;
-err_gpio:
-	for (; i >= 0; i--)
-		gpio_free(gpios[i].gpio);
-
+	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
 	return ret;
 }
 
 static void __devexit collie_bat_remove(struct ucb1x00_dev *dev)
 {
-	int i;
-
 	free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main);
 
 	power_supply_unregister(&collie_bat_bu.psy);
@@ -387,9 +362,7 @@ static void __devexit collie_bat_remove(struct ucb1x00_dev *dev)
 	 * unregistered now.
 	 */
 	cancel_work_sync(&bat_work);
-
-	for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--)
-		gpio_free(gpios[i].gpio);
+	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
 }
 
 static struct ucb1x00_driver collie_bat_driver = {
diff --git a/drivers/power/da9030_battery.c b/drivers/power/da9030_battery.c
index d2c793cf..3fd3e95 100644
--- a/drivers/power/da9030_battery.c
+++ b/drivers/power/da9030_battery.c
@@ -588,18 +588,7 @@ static struct platform_driver da903x_battery_driver = {
 	.remove = da9030_battery_remove,
 };
 
-static int da903x_battery_init(void)
-{
-	return platform_driver_register(&da903x_battery_driver);
-}
-
-static void da903x_battery_exit(void)
-{
-	platform_driver_unregister(&da903x_battery_driver);
-}
-
-module_init(da903x_battery_init);
-module_exit(da903x_battery_exit);
+module_platform_driver(da903x_battery_driver);
 
 MODULE_DESCRIPTION("DA9030 battery charger driver");
 MODULE_AUTHOR("Mike Rapoport, CompuLab");
diff --git a/drivers/power/da9052-battery.c b/drivers/power/da9052-battery.c
new file mode 100644
index 0000000..e8ea47a
--- /dev/null
+++ b/drivers/power/da9052-battery.c
@@ -0,0 +1,664 @@
+/*
+ * Batttery Driver for Dialog DA9052 PMICs
+ *
+ * Copyright(c) 2011 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.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.
+ */
+
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/fs.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/uaccess.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/pdata.h>
+#include <linux/mfd/da9052/reg.h>
+
+/* STATIC CONFIGURATION */
+#define DA9052_BAT_CUTOFF_VOLT		2800
+#define DA9052_BAT_TSH			62000
+#define DA9052_BAT_LOW_CAP		4
+#define DA9052_AVG_SZ			4
+#define DA9052_VC_TBL_SZ		68
+#define DA9052_VC_TBL_REF_SZ		3
+
+#define DA9052_ISET_USB_MASK		0x0F
+#define DA9052_CHG_USB_ILIM_MASK	0x40
+#define DA9052_CHG_LIM_COLS		16
+
+#define DA9052_MEAN(x, y)		((x + y) / 2)
+
+enum charger_type_enum {
+	DA9052_NOCHARGER = 1,
+	DA9052_CHARGER,
+};
+
+static const u16 da9052_chg_current_lim[2][DA9052_CHG_LIM_COLS] = {
+	{70,  80,  90,  100, 110, 120, 400,  450,
+	 500, 550, 600, 650, 700, 900, 1100, 1300},
+	{80,  90,  100, 110,  120,  400,  450,  500,
+	 550, 600, 800, 1000, 1200, 1400, 1600, 1800},
+};
+
+static const u16 vc_tbl_ref[3] = {10, 25, 40};
+/* Lookup table for voltage vs capacity */
+static u32 const vc_tbl[3][68][2] = {
+	/* For temperature 10 degree Celsius */
+	{
+	{4082, 100}, {4036, 98},
+	{4020, 96}, {4008, 95},
+	{3997, 93}, {3983, 91},
+	{3964, 90}, {3943, 88},
+	{3926, 87}, {3912, 85},
+	{3900, 84}, {3890, 82},
+	{3881, 80}, {3873, 79},
+	{3865, 77}, {3857, 76},
+	{3848, 74}, {3839, 73},
+	{3829, 71}, {3820, 70},
+	{3811, 68}, {3802, 67},
+	{3794, 65}, {3785, 64},
+	{3778, 62}, {3770, 61},
+	{3763, 59}, {3756, 58},
+	{3750, 56}, {3744, 55},
+	{3738, 53}, {3732, 52},
+	{3727, 50}, {3722, 49},
+	{3717, 47}, {3712, 46},
+	{3708, 44}, {3703, 43},
+	{3700, 41}, {3696, 40},
+	{3693, 38}, {3691, 37},
+	{3688, 35}, {3686, 34},
+	{3683, 32}, {3681, 31},
+	{3678, 29}, {3675, 28},
+	{3672, 26}, {3669, 25},
+	{3665, 23}, {3661, 22},
+	{3656, 21}, {3651, 19},
+	{3645, 18}, {3639, 16},
+	{3631, 15}, {3622, 13},
+	{3611, 12}, {3600, 10},
+	{3587, 9}, {3572, 7},
+	{3548, 6}, {3503, 5},
+	{3420, 3}, {3268, 2},
+	{2992, 1}, {2746, 0}
+	},
+	/* For temperature 25 degree Celsius */
+	{
+	{4102, 100}, {4065, 98},
+	{4048, 96}, {4034, 95},
+	{4021, 93}, {4011, 92},
+	{4001, 90}, {3986, 88},
+	{3968, 87}, {3952, 85},
+	{3938, 84}, {3926, 82},
+	{3916, 81}, {3908, 79},
+	{3900, 77}, {3892, 76},
+	{3883, 74}, {3874, 73},
+	{3864, 71}, {3855, 70},
+	{3846, 68}, {3836, 67},
+	{3827, 65}, {3819, 64},
+	{3810, 62}, {3801, 61},
+	{3793, 59}, {3786, 58},
+	{3778, 56}, {3772, 55},
+	{3765, 53}, {3759, 52},
+	{3754, 50}, {3748, 49},
+	{3743, 47}, {3738, 46},
+	{3733, 44}, {3728, 43},
+	{3724, 41}, {3720, 40},
+	{3716, 38}, {3712, 37},
+	{3709, 35}, {3706, 34},
+	{3703, 33}, {3701, 31},
+	{3698, 30}, {3696, 28},
+	{3693, 27}, {3690, 25},
+	{3687, 24}, {3683, 22},
+	{3680, 21}, {3675, 19},
+	{3671, 18}, {3666, 17},
+	{3660, 15}, {3654, 14},
+	{3647, 12}, {3639, 11},
+	{3630, 9}, {3621, 8},
+	{3613, 6}, {3606, 5},
+	{3597, 4}, {3582, 2},
+	{3546, 1}, {2747, 0}
+	},
+	/* For temperature 40 degree Celsius */
+	{
+	{4114, 100}, {4081, 98},
+	{4065, 96}, {4050, 95},
+	{4036, 93}, {4024, 92},
+	{4013, 90}, {4002, 88},
+	{3990, 87}, {3976, 85},
+	{3962, 84}, {3950, 82},
+	{3939, 81}, {3930, 79},
+	{3921, 77}, {3912, 76},
+	{3902, 74}, {3893, 73},
+	{3883, 71}, {3874, 70},
+	{3865, 68}, {3856, 67},
+	{3847, 65}, {3838, 64},
+	{3829, 62}, {3820, 61},
+	{3812, 59}, {3803, 58},
+	{3795, 56}, {3787, 55},
+	{3780, 53}, {3773, 52},
+	{3767, 50}, {3761, 49},
+	{3756, 47}, {3751, 46},
+	{3746, 44}, {3741, 43},
+	{3736, 41}, {3732, 40},
+	{3728, 38}, {3724, 37},
+	{3720, 35}, {3716, 34},
+	{3713, 33}, {3710, 31},
+	{3707, 30}, {3704, 28},
+	{3701, 27}, {3698, 25},
+	{3695, 24}, {3691, 22},
+	{3686, 21}, {3681, 19},
+	{3676, 18}, {3671, 17},
+	{3666, 15}, {3661, 14},
+	{3655, 12}, {3648, 11},
+	{3640, 9}, {3632, 8},
+	{3622, 6}, {3616, 5},
+	{3611, 4}, {3604, 2},
+	{3594, 1}, {2747, 0}
+	}
+};
+
+struct da9052_battery {
+	struct da9052 *da9052;
+	struct power_supply psy;
+	struct notifier_block nb;
+	int charger_type;
+	int status;
+	int health;
+};
+
+static inline int volt_reg_to_mV(int value)
+{
+	return ((value * 1000) / 512) + 2500;
+}
+
+static inline int ichg_reg_to_mA(int value)
+{
+	return (value * 3900) / 1000;
+}
+
+static int da9052_read_chgend_current(struct da9052_battery *bat,
+				       int *current_mA)
+{
+	int ret;
+
+	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
+		return -EINVAL;
+
+	ret = da9052_reg_read(bat->da9052, DA9052_ICHG_END_REG);
+	if (ret < 0)
+		return ret;
+
+	*current_mA = ichg_reg_to_mA(ret & DA9052_ICHGEND_ICHGEND);
+
+	return 0;
+}
+
+static int da9052_read_chg_current(struct da9052_battery *bat, int *current_mA)
+{
+	int ret;
+
+	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
+		return -EINVAL;
+
+	ret = da9052_reg_read(bat->da9052, DA9052_ICHG_AV_REG);
+	if (ret < 0)
+		return ret;
+
+	*current_mA = ichg_reg_to_mA(ret & DA9052_ICHGAV_ICHGAV);
+
+	return 0;
+}
+
+static int da9052_bat_check_status(struct da9052_battery *bat, int *status)
+{
+	u8 v[2] = {0, 0};
+	u8 bat_status;
+	u8 chg_end;
+	int ret;
+	int chg_current;
+	int chg_end_current;
+	bool dcinsel;
+	bool dcindet;
+	bool vbussel;
+	bool vbusdet;
+	bool dc;
+	bool vbus;
+
+	ret = da9052_group_read(bat->da9052, DA9052_STATUS_A_REG, 2, v);
+	if (ret < 0)
+		return ret;
+
+	bat_status = v[0];
+	chg_end = v[1];
+
+	dcinsel = bat_status & DA9052_STATUSA_DCINSEL;
+	dcindet = bat_status & DA9052_STATUSA_DCINDET;
+	vbussel = bat_status & DA9052_STATUSA_VBUSSEL;
+	vbusdet = bat_status & DA9052_STATUSA_VBUSDET;
+	dc = dcinsel && dcindet;
+	vbus = vbussel && vbusdet;
+
+	/* Preference to WALL(DCIN) charger unit */
+	if (dc || vbus) {
+		bat->charger_type = DA9052_CHARGER;
+
+		/* If charging end flag is set and Charging current is greater
+		 * than charging end limit then battery is charging
+		*/
+		if ((chg_end & DA9052_STATUSB_CHGEND) != 0) {
+			ret = da9052_read_chg_current(bat, &chg_current);
+			if (ret < 0)
+				return ret;
+			ret = da9052_read_chgend_current(bat, &chg_end_current);
+			if (ret < 0)
+				return ret;
+
+			if (chg_current >= chg_end_current)
+				bat->status = POWER_SUPPLY_STATUS_CHARGING;
+			else
+				bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		} else {
+			/* If Charging end flag is cleared then battery is
+			 * charging
+			*/
+			bat->status = POWER_SUPPLY_STATUS_CHARGING;
+		}
+	} else if (dcindet || vbusdet) {
+			bat->charger_type = DA9052_CHARGER;
+			bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	} else {
+		bat->charger_type = DA9052_NOCHARGER;
+		bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
+	}
+
+	if (status != NULL)
+		*status = bat->status;
+	return 0;
+}
+
+static int da9052_bat_read_volt(struct da9052_battery *bat, int *volt_mV)
+{
+	int volt;
+
+	volt = da9052_adc_manual_read(bat->da9052, DA9052_ADC_MAN_MUXSEL_VBAT);
+	if (volt < 0)
+		return volt;
+
+	*volt_mV = volt_reg_to_mV(volt);
+
+	return 0;
+}
+
+static int da9052_bat_check_presence(struct da9052_battery *bat, int *illegal)
+{
+	int bat_temp;
+
+	bat_temp = da9052_adc_read_temp(bat->da9052);
+	if (bat_temp < 0)
+		return bat_temp;
+
+	if (bat_temp > DA9052_BAT_TSH)
+		*illegal = 1;
+	else
+		*illegal = 0;
+
+	return 0;
+}
+
+static int da9052_bat_interpolate(int vbat_lower, int  vbat_upper,
+				   int level_lower, int level_upper,
+				   int bat_voltage)
+{
+	int tmp;
+
+	tmp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower);
+	tmp = level_lower + (((bat_voltage - vbat_lower) * tmp) / 1000);
+
+	return tmp;
+}
+
+unsigned char da9052_determine_vc_tbl_index(unsigned char adc_temp)
+{
+	int i;
+
+	if (adc_temp <= vc_tbl_ref[0])
+		return 0;
+
+	if (adc_temp > vc_tbl_ref[DA9052_VC_TBL_REF_SZ - 1])
+		return DA9052_VC_TBL_REF_SZ - 1;
+
+	for (i = 0; i < DA9052_VC_TBL_REF_SZ; i++) {
+		if ((adc_temp > vc_tbl_ref[i]) &&
+		    (adc_temp <= DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1])))
+				return i;
+		if ((adc_temp > DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1]))
+		     && (adc_temp <= vc_tbl_ref[i]))
+				return i + 1;
+	}
+}
+
+static int da9052_bat_read_capacity(struct da9052_battery *bat, int *capacity)
+{
+	int adc_temp;
+	int bat_voltage;
+	int vbat_lower;
+	int vbat_upper;
+	int level_upper;
+	int level_lower;
+	int ret;
+	int flag;
+	int i = 0;
+	int j;
+
+	ret = da9052_bat_read_volt(bat, &bat_voltage);
+	if (ret < 0)
+		return ret;
+
+	adc_temp = da9052_adc_read_temp(bat->da9052);
+	if (adc_temp < 0)
+		return adc_temp;
+
+	i = da9052_determine_vc_tbl_index(adc_temp);
+
+	if (bat_voltage >= vc_tbl[i][0][0]) {
+		*capacity = 100;
+		return 0;
+	}
+	if (bat_voltage <= vc_tbl[i][DA9052_VC_TBL_SZ - 1][0]) {
+		*capacity = 0;
+		return 0;
+	}
+	flag = 0;
+
+	for (j = 0; j < (DA9052_VC_TBL_SZ-1); j++) {
+		if ((bat_voltage <= vc_tbl[i][j][0]) &&
+		    (bat_voltage >= vc_tbl[i][j + 1][0])) {
+			vbat_upper = vc_tbl[i][j][0];
+			vbat_lower = vc_tbl[i][j + 1][0];
+			level_upper = vc_tbl[i][j][1];
+			level_lower = vc_tbl[i][j + 1][1];
+			flag = 1;
+			break;
+		}
+	}
+	if (!flag)
+		return -EIO;
+
+	*capacity = da9052_bat_interpolate(vbat_lower, vbat_upper, level_lower,
+					   level_upper, bat_voltage);
+
+	return 0;
+}
+
+static int da9052_bat_check_health(struct da9052_battery *bat, int *health)
+{
+	int ret;
+	int bat_illegal;
+	int capacity;
+
+	ret = da9052_bat_check_presence(bat, &bat_illegal);
+	if (ret < 0)
+		return ret;
+
+	if (bat_illegal) {
+		bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;
+		return 0;
+	}
+
+	if (bat->health != POWER_SUPPLY_HEALTH_OVERHEAT) {
+		ret = da9052_bat_read_capacity(bat, &capacity);
+		if (ret < 0)
+			return ret;
+		if (capacity < DA9052_BAT_LOW_CAP)
+			bat->health = POWER_SUPPLY_HEALTH_DEAD;
+		else
+			bat->health = POWER_SUPPLY_HEALTH_GOOD;
+	}
+
+	*health = bat->health;
+
+	return 0;
+}
+
+static irqreturn_t da9052_bat_irq(int irq, void *data)
+{
+	struct da9052_battery *bat = data;
+
+	irq -= bat->da9052->irq_base;
+
+	if (irq == DA9052_IRQ_CHGEND)
+		bat->status = POWER_SUPPLY_STATUS_FULL;
+	else
+		da9052_bat_check_status(bat, NULL);
+
+	if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN ||
+	    irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) {
+		power_supply_changed(&bat->psy);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int da9052_USB_current_notifier(struct notifier_block *nb,
+					unsigned long events, void *data)
+{
+	u8 row;
+	u8 col;
+	int *current_mA = data;
+	int ret;
+	struct da9052_battery *bat = container_of(nb, struct da9052_battery,
+						  nb);
+
+	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
+		return -EPERM;
+
+	ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG);
+	if (ret & DA9052_CHG_USB_ILIM_MASK)
+		return -EPERM;
+
+	if (bat->da9052->chip_id == DA9052)
+		row = 0;
+	else
+		row = 1;
+
+	if (*current_mA < da9052_chg_current_lim[row][0] ||
+	    *current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1])
+		return -EINVAL;
+
+	for (col = 0; col <= DA9052_CHG_LIM_COLS - 1 ; col++) {
+		if (*current_mA <= da9052_chg_current_lim[row][col])
+			break;
+	}
+
+	return da9052_reg_update(bat->da9052, DA9052_ISET_REG,
+				 DA9052_ISET_USB_MASK, col);
+}
+
+static int da9052_bat_get_property(struct power_supply *psy,
+				    enum power_supply_property psp,
+				    union power_supply_propval *val)
+{
+	int ret;
+	int illegal;
+	struct da9052_battery *bat = container_of(psy, struct da9052_battery,
+						  psy);
+
+	ret = da9052_bat_check_presence(bat, &illegal);
+	if (ret < 0)
+		return ret;
+
+	if (illegal && psp != POWER_SUPPLY_PROP_PRESENT)
+		return -ENODEV;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = da9052_bat_check_status(bat, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval =
+			(bat->charger_type == DA9052_NOCHARGER) ? 0 : 1;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		ret = da9052_bat_check_presence(bat, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		ret = da9052_bat_check_health(bat, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+		val->intval = DA9052_BAT_CUTOFF_VOLT * 1000;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		ret = da9052_bat_read_volt(bat, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		ret = da9052_read_chg_current(bat, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		ret = da9052_bat_read_capacity(bat, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		val->intval = da9052_adc_read_temp(bat->da9052);
+		ret = val->intval;
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return ret;
+}
+
+static enum power_supply_property da9052_bat_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+};
+
+static struct power_supply template_battery = {
+	.name		= "da9052-bat",
+	.type		= POWER_SUPPLY_TYPE_BATTERY,
+	.properties	= da9052_bat_props,
+	.num_properties	= ARRAY_SIZE(da9052_bat_props),
+	.get_property	= da9052_bat_get_property,
+};
+
+static const char *const da9052_bat_irqs[] = {
+	"BATT TEMP",
+	"DCIN DET",
+	"DCIN REM",
+	"VBUS DET",
+	"VBUS REM",
+	"CHG END",
+};
+
+static s32 __devinit da9052_bat_probe(struct platform_device *pdev)
+{
+	struct da9052_pdata *pdata;
+	struct da9052_battery *bat;
+	int ret;
+	int irq;
+	int i;
+
+	bat = kzalloc(sizeof(struct da9052_battery), GFP_KERNEL);
+	if (!bat)
+		return -ENOMEM;
+
+	bat->da9052 = dev_get_drvdata(pdev->dev.parent);
+	bat->psy = template_battery;
+	bat->charger_type = DA9052_NOCHARGER;
+	bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
+	bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;
+	bat->nb.notifier_call = da9052_USB_current_notifier;
+
+	pdata = bat->da9052->dev->platform_data;
+	if (pdata != NULL && pdata->use_for_apm)
+		bat->psy.use_for_apm = pdata->use_for_apm;
+	else
+		bat->psy.use_for_apm = 1;
+
+	for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) {
+		irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]);
+		ret = request_threaded_irq(bat->da9052->irq_base + irq,
+					   NULL, da9052_bat_irq,
+					   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+					   da9052_bat_irqs[i], bat);
+		if (ret != 0) {
+			dev_err(bat->da9052->dev,
+				"DA9052 failed to request %s IRQ %d: %d\n",
+				da9052_bat_irqs[i], irq, ret);
+			goto err;
+		}
+	}
+
+	ret = power_supply_register(&pdev->dev, &bat->psy);
+	 if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	for (; i >= 0; i--) {
+		irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]);
+		free_irq(bat->da9052->irq_base + irq, bat);
+	}
+	kfree(bat);
+	return ret;
+}
+static int __devexit da9052_bat_remove(struct platform_device *pdev)
+{
+	int i;
+	int irq;
+	struct da9052_battery *bat = platform_get_drvdata(pdev);
+
+	for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) {
+		irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]);
+		free_irq(bat->da9052->irq_base + irq, bat);
+	}
+	power_supply_unregister(&bat->psy);
+
+	return 0;
+}
+
+static struct platform_driver da9052_bat_driver = {
+	.probe = da9052_bat_probe,
+	.remove = __devexit_p(da9052_bat_remove),
+	.driver = {
+		.name = "da9052-bat",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init da9052_bat_init(void)
+{
+	return platform_driver_register(&da9052_bat_driver);
+}
+module_init(da9052_bat_init);
+
+static void __exit da9052_bat_exit(void)
+{
+	platform_driver_unregister(&da9052_bat_driver);
+}
+module_exit(da9052_bat_exit);
+
+MODULE_DESCRIPTION("DA9052 BAT Device Driver");
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9052-bat");
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index f2c9cc3..545874b 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -95,7 +95,11 @@ static int rated_capacities[] = {
 	2880,	/* Samsung */
 	2880,	/* BYD */
 	2880,	/* Lishen */
-	2880	/* NEC */
+	2880,	/* NEC */
+#ifdef CONFIG_MACH_H4700
+	0,
+	3600,	/* HP iPAQ hx4700 3.7V 3600mAh (359114-001) */
+#endif
 };
 
 /* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C
@@ -637,18 +641,7 @@ static struct platform_driver ds2760_battery_driver = {
 	.resume	  = ds2760_battery_resume,
 };
 
-static int __init ds2760_battery_init(void)
-{
-	return platform_driver_register(&ds2760_battery_driver);
-}
-
-static void __exit ds2760_battery_exit(void)
-{
-	platform_driver_unregister(&ds2760_battery_driver);
-}
-
-module_init(ds2760_battery_init);
-module_exit(ds2760_battery_exit);
+module_platform_driver(ds2760_battery_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, "
diff --git a/drivers/power/ds2780_battery.c b/drivers/power/ds2780_battery.c
index 91a783d..de31cae 100644
--- a/drivers/power/ds2780_battery.c
+++ b/drivers/power/ds2780_battery.c
@@ -841,29 +841,17 @@ static int __devexit ds2780_battery_remove(struct platform_device *pdev)
 	return 0;
 }
 
-MODULE_ALIAS("platform:ds2780-battery");
-
 static struct platform_driver ds2780_battery_driver = {
 	.driver = {
 		.name = "ds2780-battery",
 	},
 	.probe	  = ds2780_battery_probe,
-	.remove   = ds2780_battery_remove,
+	.remove   = __devexit_p(ds2780_battery_remove),
 };
 
-static int __init ds2780_battery_init(void)
-{
-	return platform_driver_register(&ds2780_battery_driver);
-}
-
-static void __exit ds2780_battery_exit(void)
-{
-	platform_driver_unregister(&ds2780_battery_driver);
-}
-
-module_init(ds2780_battery_init);
-module_exit(ds2780_battery_exit);
+module_platform_driver(ds2780_battery_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Clifton Barnes <cabarnes@indesign-llc.com>");
 MODULE_DESCRIPTION("Maxim/Dallas DS2780 Stand-Alone Fuel Gauage IC driver");
+MODULE_ALIAS("platform:ds2780-battery");
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index a64b885..8672c91 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -185,17 +185,7 @@ static struct platform_driver gpio_charger_driver = {
 	},
 };
 
-static int __init gpio_charger_init(void)
-{
-	return platform_driver_register(&gpio_charger_driver);
-}
-module_init(gpio_charger_init);
-
-static void __exit gpio_charger_exit(void)
-{
-	platform_driver_unregister(&gpio_charger_driver);
-}
-module_exit(gpio_charger_exit);
+module_platform_driver(gpio_charger_driver);
 
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("Driver for chargers which report their online status through a GPIO");
diff --git a/drivers/power/intel_mid_battery.c b/drivers/power/intel_mid_battery.c
index 01fa671..d096497 100644
--- a/drivers/power/intel_mid_battery.c
+++ b/drivers/power/intel_mid_battery.c
@@ -779,18 +779,7 @@ static struct platform_driver platform_pmic_battery_driver = {
 	.remove = __devexit_p(platform_pmic_battery_remove),
 };
 
-static int __init platform_pmic_battery_module_init(void)
-{
-	return platform_driver_register(&platform_pmic_battery_driver);
-}
-
-static void __exit platform_pmic_battery_module_exit(void)
-{
-	platform_driver_unregister(&platform_pmic_battery_driver);
-}
-
-module_init(platform_pmic_battery_module_init);
-module_exit(platform_pmic_battery_module_exit);
+module_platform_driver(platform_pmic_battery_driver);
 
 MODULE_AUTHOR("Nithish Mahalingam <nithish.mahalingam@intel.com>");
 MODULE_DESCRIPTION("Intel Moorestown PMIC Battery Driver");
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index f6d72b4..b806667 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -79,7 +79,7 @@ static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)
 {
 	struct isp1704_charger_data	*board = isp->dev->platform_data;
 
-	if (board->set_power)
+	if (board && board->set_power)
 		board->set_power(on);
 }
 
@@ -494,17 +494,7 @@ static struct platform_driver isp1704_charger_driver = {
 	.remove = __devexit_p(isp1704_charger_remove),
 };
 
-static int __init isp1704_charger_init(void)
-{
-	return platform_driver_register(&isp1704_charger_driver);
-}
-module_init(isp1704_charger_init);
-
-static void __exit isp1704_charger_exit(void)
-{
-	platform_driver_unregister(&isp1704_charger_driver);
-}
-module_exit(isp1704_charger_exit);
+module_platform_driver(isp1704_charger_driver);
 
 MODULE_ALIAS("platform:isp1704_charger");
 MODULE_AUTHOR("Nokia Corporation");
diff --git a/drivers/power/jz4740-battery.c b/drivers/power/jz4740-battery.c
index 763f894..8dbc7bf 100644
--- a/drivers/power/jz4740-battery.c
+++ b/drivers/power/jz4740-battery.c
@@ -67,7 +67,7 @@ static irqreturn_t jz_battery_irq_handler(int irq, void *devid)
 
 static long jz_battery_read_voltage(struct jz_battery *battery)
 {
-	unsigned long t;
+	long t;
 	unsigned long val;
 	long voltage;
 
@@ -441,17 +441,7 @@ static struct platform_driver jz_battery_driver = {
 	},
 };
 
-static int __init jz_battery_init(void)
-{
-	return platform_driver_register(&jz_battery_driver);
-}
-module_init(jz_battery_init);
-
-static void __exit jz_battery_exit(void)
-{
-	platform_driver_unregister(&jz_battery_driver);
-}
-module_exit(jz_battery_exit);
+module_platform_driver(jz_battery_driver);
 
 MODULE_ALIAS("platform:jz4740-battery");
 MODULE_LICENSE("GPL");
diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c
new file mode 100644
index 0000000..b15b575
--- /dev/null
+++ b/drivers/power/lp8727_charger.c
@@ -0,0 +1,494 @@
+/*
+ * Driver for LP8727 Micro/Mini USB IC with intergrated charger
+ *
+ *			Copyright (C) 2011 National Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/power_supply.h>
+#include <linux/lp8727.h>
+
+#define DEBOUNCE_MSEC	270
+
+/* Registers */
+#define CTRL1		0x1
+#define CTRL2		0x2
+#define	SWCTRL		0x3
+#define INT1		0x4
+#define INT2		0x5
+#define STATUS1		0x6
+#define STATUS2 	0x7
+#define CHGCTRL2	0x9
+
+/* CTRL1 register */
+#define CP_EN		(1 << 0)
+#define ADC_EN		(1 << 1)
+#define ID200_EN	(1 << 4)
+
+/* CTRL2 register */
+#define CHGDET_EN	(1 << 1)
+#define INT_EN		(1 << 6)
+
+/* SWCTRL register */
+#define SW_DM1_DM	(0x0 << 0)
+#define SW_DM1_U1	(0x1 << 0)
+#define SW_DM1_HiZ	(0x7 << 0)
+#define SW_DP2_DP	(0x0 << 3)
+#define SW_DP2_U2	(0x1 << 3)
+#define SW_DP2_HiZ	(0x7 << 3)
+
+/* INT1 register */
+#define IDNO		(0xF << 0)
+#define VBUS		(1 << 4)
+
+/* STATUS1 register */
+#define CHGSTAT		(3 << 4)
+#define CHPORT		(1 << 6)
+#define DCPORT		(1 << 7)
+
+/* STATUS2 register */
+#define TEMP_STAT	(3 << 5)
+
+enum lp8727_dev_id {
+	ID_NONE,
+	ID_TA,
+	ID_DEDICATED_CHG,
+	ID_USB_CHG,
+	ID_USB_DS,
+	ID_MAX,
+};
+
+enum lp8727_chg_stat {
+	PRECHG,
+	CC,
+	CV,
+	EOC,
+};
+
+struct lp8727_psy {
+	struct power_supply ac;
+	struct power_supply usb;
+	struct power_supply batt;
+};
+
+struct lp8727_chg {
+	struct device *dev;
+	struct i2c_client *client;
+	struct mutex xfer_lock;
+	struct delayed_work work;
+	struct workqueue_struct *irqthread;
+	struct lp8727_platform_data *pdata;
+	struct lp8727_psy *psy;
+	struct lp8727_chg_param *chg_parm;
+	enum lp8727_dev_id devid;
+};
+
+static int lp8727_i2c_read(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len)
+{
+	s32 ret;
+
+	mutex_lock(&pchg->xfer_lock);
+	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
+	mutex_unlock(&pchg->xfer_lock);
+
+	return (ret != len) ? -EIO : 0;
+}
+
+static int lp8727_i2c_write(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len)
+{
+	s32 ret;
+
+	mutex_lock(&pchg->xfer_lock);
+	ret = i2c_smbus_write_i2c_block_data(pchg->client, reg, len, data);
+	mutex_unlock(&pchg->xfer_lock);
+
+	return ret;
+}
+
+static inline int lp8727_i2c_read_byte(struct lp8727_chg *pchg, u8 reg,
+				       u8 *data)
+{
+	return lp8727_i2c_read(pchg, reg, data, 1);
+}
+
+static inline int lp8727_i2c_write_byte(struct lp8727_chg *pchg, u8 reg,
+					u8 *data)
+{
+	return lp8727_i2c_write(pchg, reg, data, 1);
+}
+
+static int lp8727_is_charger_attached(const char *name, int id)
+{
+	if (name) {
+		if (!strcmp(name, "ac"))
+			return (id == ID_TA || id == ID_DEDICATED_CHG) ? 1 : 0;
+		else if (!strcmp(name, "usb"))
+			return (id == ID_USB_CHG) ? 1 : 0;
+	}
+
+	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
+}
+
+static void lp8727_init_device(struct lp8727_chg *pchg)
+{
+	u8 val;
+
+	val = ID200_EN | ADC_EN | CP_EN;
+	if (lp8727_i2c_write_byte(pchg, CTRL1, &val))
+		dev_err(pchg->dev, "i2c write err : addr=0x%.2x\n", CTRL1);
+
+	val = INT_EN | CHGDET_EN;
+	if (lp8727_i2c_write_byte(pchg, CTRL2, &val))
+		dev_err(pchg->dev, "i2c write err : addr=0x%.2x\n", CTRL2);
+}
+
+static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
+{
+	u8 val;
+	lp8727_i2c_read_byte(pchg, STATUS1, &val);
+	return (val & DCPORT);
+}
+
+static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
+{
+	u8 val;
+	lp8727_i2c_read_byte(pchg, STATUS1, &val);
+	return (val & CHPORT);
+}
+
+static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
+{
+	u8 val = sw;
+	lp8727_i2c_write_byte(pchg, SWCTRL, &val);
+}
+
+static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
+{
+	u8 devid = ID_NONE;
+	u8 swctrl = SW_DM1_HiZ | SW_DP2_HiZ;
+
+	switch (id) {
+	case 0x5:
+		devid = ID_TA;
+		pchg->chg_parm = &pchg->pdata->ac;
+		break;
+	case 0xB:
+		if (lp8727_is_dedicated_charger(pchg)) {
+			pchg->chg_parm = &pchg->pdata->ac;
+			devid = ID_DEDICATED_CHG;
+		} else if (lp8727_is_usb_charger(pchg)) {
+			pchg->chg_parm = &pchg->pdata->usb;
+			devid = ID_USB_CHG;
+			swctrl = SW_DM1_DM | SW_DP2_DP;
+		} else if (vbusin) {
+			devid = ID_USB_DS;
+			swctrl = SW_DM1_DM | SW_DP2_DP;
+		}
+		break;
+	default:
+		devid = ID_NONE;
+		pchg->chg_parm = NULL;
+		break;
+	}
+
+	pchg->devid = devid;
+	lp8727_ctrl_switch(pchg, swctrl);
+}
+
+static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
+{
+	u8 val;
+
+	lp8727_i2c_read_byte(pchg, CTRL2, &val);
+	val |= CHGDET_EN;
+	lp8727_i2c_write_byte(pchg, CTRL2, &val);
+}
+
+static void lp8727_delayed_func(struct work_struct *_work)
+{
+	u8 intstat[2], idno, vbus;
+	struct lp8727_chg *pchg =
+	    container_of(_work, struct lp8727_chg, work.work);
+
+	if (lp8727_i2c_read(pchg, INT1, intstat, 2)) {
+		dev_err(pchg->dev, "can not read INT registers\n");
+		return;
+	}
+
+	idno = intstat[0] & IDNO;
+	vbus = intstat[0] & VBUS;
+
+	lp8727_id_detection(pchg, idno, vbus);
+	lp8727_enable_chgdet(pchg);
+
+	power_supply_changed(&pchg->psy->ac);
+	power_supply_changed(&pchg->psy->usb);
+	power_supply_changed(&pchg->psy->batt);
+}
+
+static irqreturn_t lp8727_isr_func(int irq, void *ptr)
+{
+	struct lp8727_chg *pchg = ptr;
+	unsigned long delay = msecs_to_jiffies(DEBOUNCE_MSEC);
+
+	queue_delayed_work(pchg->irqthread, &pchg->work, delay);
+
+	return IRQ_HANDLED;
+}
+
+static void lp8727_intr_config(struct lp8727_chg *pchg)
+{
+	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
+
+	pchg->irqthread = create_singlethread_workqueue("lp8727-irqthd");
+	if (!pchg->irqthread)
+		dev_err(pchg->dev, "can not create thread for lp8727\n");
+
+	if (request_threaded_irq(pchg->client->irq,
+				 NULL,
+				 lp8727_isr_func,
+				 IRQF_TRIGGER_FALLING, "lp8727_irq", pchg)) {
+		dev_err(pchg->dev, "lp8727 irq can not be registered\n");
+	}
+}
+
+static enum power_supply_property lp8727_charger_prop[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static enum power_supply_property lp8727_battery_prop[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_TEMP,
+};
+
+static char *battery_supplied_to[] = {
+	"main_batt",
+};
+
+static int lp8727_charger_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
+
+	if (psp == POWER_SUPPLY_PROP_ONLINE)
+		val->intval = lp8727_is_charger_attached(psy->name,
+							 pchg->devid);
+
+	return 0;
+}
+
+static int lp8727_battery_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
+	u8 read;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
+			lp8727_i2c_read_byte(pchg, STATUS1, &read);
+			if (((read & CHGSTAT) >> 4) == EOC)
+				val->intval = POWER_SUPPLY_STATUS_FULL;
+			else
+				val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		} else {
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		}
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		lp8727_i2c_read_byte(pchg, STATUS2, &read);
+		read = (read & TEMP_STAT) >> 5;
+		if (read >= 0x1 && read <= 0x3)
+			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+		else
+			val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		if (pchg->pdata->get_batt_present)
+			val->intval = pchg->pdata->get_batt_present();
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		if (pchg->pdata->get_batt_level)
+			val->intval = pchg->pdata->get_batt_level();
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		if (pchg->pdata->get_batt_capacity)
+			val->intval = pchg->pdata->get_batt_capacity();
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		if (pchg->pdata->get_batt_temp)
+			val->intval = pchg->pdata->get_batt_temp();
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static void lp8727_charger_changed(struct power_supply *psy)
+{
+	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
+	u8 val;
+	u8 eoc_level, ichg;
+
+	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
+		if (pchg->chg_parm) {
+			eoc_level = pchg->chg_parm->eoc_level;
+			ichg = pchg->chg_parm->ichg;
+			val = (ichg << 4) | eoc_level;
+			lp8727_i2c_write_byte(pchg, CHGCTRL2, &val);
+		}
+	}
+}
+
+static int lp8727_register_psy(struct lp8727_chg *pchg)
+{
+	struct lp8727_psy *psy;
+
+	psy = kzalloc(sizeof(*psy), GFP_KERNEL);
+	if (!psy)
+		goto err_mem;
+
+	pchg->psy = psy;
+
+	psy->ac.name = "ac";
+	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
+	psy->ac.properties = lp8727_charger_prop;
+	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
+	psy->ac.get_property = lp8727_charger_get_property;
+	psy->ac.supplied_to = battery_supplied_to;
+	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
+
+	if (power_supply_register(pchg->dev, &psy->ac))
+		goto err_psy;
+
+	psy->usb.name = "usb";
+	psy->usb.type = POWER_SUPPLY_TYPE_USB;
+	psy->usb.properties = lp8727_charger_prop;
+	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
+	psy->usb.get_property = lp8727_charger_get_property;
+	psy->usb.supplied_to = battery_supplied_to;
+	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
+
+	if (power_supply_register(pchg->dev, &psy->usb))
+		goto err_psy;
+
+	psy->batt.name = "main_batt";
+	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
+	psy->batt.properties = lp8727_battery_prop;
+	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
+	psy->batt.get_property = lp8727_battery_get_property;
+	psy->batt.external_power_changed = lp8727_charger_changed;
+
+	if (power_supply_register(pchg->dev, &psy->batt))
+		goto err_psy;
+
+	return 0;
+
+err_mem:
+	return -ENOMEM;
+err_psy:
+	kfree(psy);
+	return -EPERM;
+}
+
+static void lp8727_unregister_psy(struct lp8727_chg *pchg)
+{
+	struct lp8727_psy *psy = pchg->psy;
+
+	if (!psy)
+		return;
+
+	power_supply_unregister(&psy->ac);
+	power_supply_unregister(&psy->usb);
+	power_supply_unregister(&psy->batt);
+	kfree(psy);
+}
+
+static int lp8727_probe(struct i2c_client *cl, const struct i2c_device_id *id)
+{
+	struct lp8727_chg *pchg;
+	int ret;
+
+	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
+		return -EIO;
+
+	pchg = kzalloc(sizeof(*pchg), GFP_KERNEL);
+	if (!pchg)
+		return -ENOMEM;
+
+	pchg->client = cl;
+	pchg->dev = &cl->dev;
+	pchg->pdata = cl->dev.platform_data;
+	i2c_set_clientdata(cl, pchg);
+
+	mutex_init(&pchg->xfer_lock);
+
+	lp8727_init_device(pchg);
+	lp8727_intr_config(pchg);
+
+	ret = lp8727_register_psy(pchg);
+	if (ret)
+		dev_err(pchg->dev,
+			"can not register power supplies. err=%d", ret);
+
+	return 0;
+}
+
+static int __devexit lp8727_remove(struct i2c_client *cl)
+{
+	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
+
+	lp8727_unregister_psy(pchg);
+	free_irq(pchg->client->irq, pchg);
+	flush_workqueue(pchg->irqthread);
+	destroy_workqueue(pchg->irqthread);
+	kfree(pchg);
+	return 0;
+}
+
+static const struct i2c_device_id lp8727_ids[] = {
+	{"lp8727", 0},
+};
+
+static struct i2c_driver lp8727_driver = {
+	.driver = {
+		   .name = "lp8727",
+		   },
+	.probe = lp8727_probe,
+	.remove = __devexit_p(lp8727_remove),
+	.id_table = lp8727_ids,
+};
+
+static int __init lp8727_init(void)
+{
+	return i2c_add_driver(&lp8727_driver);
+}
+
+static void __exit lp8727_exit(void)
+{
+	i2c_del_driver(&lp8727_driver);
+}
+
+module_init(lp8727_init);
+module_exit(lp8727_exit);
+
+MODULE_DESCRIPTION("National Semiconductor LP8727 charger driver");
+MODULE_AUTHOR
+    ("Woogyom Kim <milo.kim@ti.com>, Daniel Jeong <daniel.jeong@ti.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index 9f0183c..86acee2 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -85,55 +85,79 @@ static int max17042_get_property(struct power_supply *psy,
 {
 	struct max17042_chip *chip = container_of(psy,
 				struct max17042_chip, battery);
+	int ret;
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_PRESENT:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_STATUS);
-		if (val->intval & MAX17042_STATUS_BattAbsent)
+		ret = max17042_read_reg(chip->client, MAX17042_STATUS);
+		if (ret < 0)
+			return ret;
+
+		if (ret & MAX17042_STATUS_BattAbsent)
 			val->intval = 0;
 		else
 			val->intval = 1;
 		break;
 	case POWER_SUPPLY_PROP_CYCLE_COUNT:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_Cycles);
+		ret = max17042_read_reg(chip->client, MAX17042_Cycles);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret;
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_MinMaxVolt);
-		val->intval >>= 8;
+		ret = max17042_read_reg(chip->client, MAX17042_MinMaxVolt);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret >> 8;
 		val->intval *= 20000; /* Units of LSB = 20mV */
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_V_empty);
-		val->intval >>= 7;
+		ret = max17042_read_reg(chip->client, MAX17042_V_empty);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret >> 7;
 		val->intval *= 10000; /* Units of LSB = 10mV */
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_VCELL) * 83; /* 1000 / 12 = 83 */
+		ret = max17042_read_reg(chip->client, MAX17042_VCELL);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret * 625 / 8;
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_AvgVCELL) * 83;
+		ret = max17042_read_reg(chip->client, MAX17042_AvgVCELL);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret * 625 / 8;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_SOC) / 256;
+		ret = max17042_read_reg(chip->client, MAX17042_SOC);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret >> 8;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_RepSOC);
-		if ((val->intval / 256) >= MAX17042_BATTERY_FULL)
+		ret = max17042_read_reg(chip->client, MAX17042_RepSOC);
+		if (ret < 0)
+			return ret;
+
+		if ((ret >> 8) >= MAX17042_BATTERY_FULL)
 			val->intval = 1;
-		else if (val->intval >= 0)
+		else if (ret >= 0)
 			val->intval = 0;
 		break;
 	case POWER_SUPPLY_PROP_TEMP:
-		val->intval = max17042_read_reg(chip->client,
-				MAX17042_TEMP);
+		ret = max17042_read_reg(chip->client, MAX17042_TEMP);
+		if (ret < 0)
+			return ret;
+
+		val->intval = ret;
 		/* The value is signed. */
 		if (val->intval & 0x8000) {
 			val->intval = (0x7fff & ~val->intval) + 1;
@@ -145,24 +169,30 @@ static int max17042_get_property(struct power_supply *psy,
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
 		if (chip->pdata->enable_current_sense) {
-			val->intval = max17042_read_reg(chip->client,
-					MAX17042_Current);
+			ret = max17042_read_reg(chip->client, MAX17042_Current);
+			if (ret < 0)
+				return ret;
+
+			val->intval = ret;
 			if (val->intval & 0x8000) {
 				/* Negative */
 				val->intval = ~val->intval & 0x7fff;
 				val->intval++;
 				val->intval *= -1;
 			}
-			val->intval >>= 4;
-			val->intval *= 1000000 * 25 / chip->pdata->r_sns;
+			val->intval *= 1562500 / chip->pdata->r_sns;
 		} else {
 			return -EINVAL;
 		}
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_AVG:
 		if (chip->pdata->enable_current_sense) {
-			val->intval = max17042_read_reg(chip->client,
-					MAX17042_AvgCurrent);
+			ret = max17042_read_reg(chip->client,
+						MAX17042_AvgCurrent);
+			if (ret < 0)
+				return ret;
+
+			val->intval = ret;
 			if (val->intval & 0x8000) {
 				/* Negative */
 				val->intval = ~val->intval & 0x7fff;
@@ -210,6 +240,9 @@ static int __devinit max17042_probe(struct i2c_client *client,
 	if (!chip->pdata->enable_current_sense)
 		chip->battery.num_properties -= 2;
 
+	if (chip->pdata->r_sns == 0)
+		chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
+
 	ret = power_supply_register(&client->dev, &chip->battery);
 	if (ret) {
 		dev_err(&client->dev, "failed: power supply register\n");
@@ -226,9 +259,6 @@ static int __devinit max17042_probe(struct i2c_client *client,
 		max17042_write_reg(client, MAX17042_CGAIN, 0x0000);
 		max17042_write_reg(client, MAX17042_MiscCFG, 0x0003);
 		max17042_write_reg(client, MAX17042_LearnCFG, 0x0007);
-	} else {
-		if (chip->pdata->r_sns == 0)
-			chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
 	}
 
 	return 0;
diff --git a/drivers/power/max8903_charger.c b/drivers/power/max8903_charger.c
index 2595145..3e23f43 100644
--- a/drivers/power/max8903_charger.c
+++ b/drivers/power/max8903_charger.c
@@ -374,19 +374,9 @@ static struct platform_driver max8903_driver = {
 	},
 };
 
-static int __init max8903_init(void)
-{
-	return platform_driver_register(&max8903_driver);
-}
-module_init(max8903_init);
-
-static void __exit max8903_exit(void)
-{
-	platform_driver_unregister(&max8903_driver);
-}
-module_exit(max8903_exit);
+module_platform_driver(max8903_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("MAX8903 Charger Driver");
 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
-MODULE_ALIAS("max8903-charger");
+MODULE_ALIAS("platform:max8903-charger");
diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c
index a70e16d..daa333b 100644
--- a/drivers/power/max8925_power.c
+++ b/drivers/power/max8925_power.c
@@ -78,6 +78,8 @@ struct max8925_power_info {
 	unsigned		batt_detect:1;	/* detecing MB by ID pin */
 	unsigned		topoff_threshold:2;
 	unsigned		fast_charge:3;
+	unsigned		no_temp_support:1;
+	unsigned		no_insert_detect:1;
 
 	int (*set_charger) (int);
 };
@@ -116,17 +118,7 @@ static irqreturn_t max8925_charger_handler(int irq, void *data)
 	case MAX8925_IRQ_VCHG_DC_F:
 		info->ac_online = 0;
 		__set_charger(info, 0);
-		dev_dbg(chip->dev, "Adapter is removal\n");
-		break;
-	case MAX8925_IRQ_VCHG_USB_R:
-		info->usb_online = 1;
-		__set_charger(info, 1);
-		dev_dbg(chip->dev, "USB inserted\n");
-		break;
-	case MAX8925_IRQ_VCHG_USB_F:
-		info->usb_online = 0;
-		__set_charger(info, 0);
-		dev_dbg(chip->dev, "USB is removal\n");
+		dev_dbg(chip->dev, "Adapter removed\n");
 		break;
 	case MAX8925_IRQ_VCHG_THM_OK_F:
 		/* Battery is not ready yet */
@@ -168,27 +160,33 @@ static irqreturn_t max8925_charger_handler(int irq, void *data)
 static int start_measure(struct max8925_power_info *info, int type)
 {
 	unsigned char buf[2] = {0, 0};
+	int meas_cmd;
 	int meas_reg = 0, ret;
 
 	switch (type) {
 	case MEASURE_VCHG:
+		meas_cmd = MAX8925_CMD_VCHG;
 		meas_reg = MAX8925_ADC_VCHG;
 		break;
 	case MEASURE_VBBATT:
+		meas_cmd = MAX8925_CMD_VBBATT;
 		meas_reg = MAX8925_ADC_VBBATT;
 		break;
 	case MEASURE_VMBATT:
+		meas_cmd = MAX8925_CMD_VMBATT;
 		meas_reg = MAX8925_ADC_VMBATT;
 		break;
 	case MEASURE_ISNS:
+		meas_cmd = MAX8925_CMD_ISNS;
 		meas_reg = MAX8925_ADC_ISNS;
 		break;
 	default:
 		return -EINVAL;
 	}
 
+	max8925_reg_write(info->adc, meas_cmd, 0);
 	max8925_bulk_read(info->adc, meas_reg, 2, buf);
-	ret = (buf[0] << 4) | (buf[1] >> 4);
+	ret = ((buf[0]<<8) | buf[1]) >> 4;
 
 	return ret;
 }
@@ -208,7 +206,7 @@ static int max8925_ac_get_prop(struct power_supply *psy,
 		if (info->ac_online) {
 			ret = start_measure(info, MEASURE_VCHG);
 			if (ret >= 0) {
-				val->intval = ret << 1;	/* unit is mV */
+				val->intval = ret * 2000;	/* unit is uV */
 				goto out;
 			}
 		}
@@ -242,7 +240,7 @@ static int max8925_usb_get_prop(struct power_supply *psy,
 		if (info->usb_online) {
 			ret = start_measure(info, MEASURE_VCHG);
 			if (ret >= 0) {
-				val->intval = ret << 1;	/* unit is mV */
+				val->intval = ret * 2000;	/* unit is uV */
 				goto out;
 			}
 		}
@@ -266,7 +264,6 @@ static int max8925_bat_get_prop(struct power_supply *psy,
 				union power_supply_propval *val)
 {
 	struct max8925_power_info *info = dev_get_drvdata(psy->dev->parent);
-	long long int tmp = 0;
 	int ret = 0;
 
 	switch (psp) {
@@ -277,7 +274,7 @@ static int max8925_bat_get_prop(struct power_supply *psy,
 		if (info->bat_online) {
 			ret = start_measure(info, MEASURE_VMBATT);
 			if (ret >= 0) {
-				val->intval = ret << 1;	/* unit is mV */
+				val->intval = ret * 2000;	/* unit is uV */
 				ret = 0;
 				break;
 			}
@@ -288,8 +285,8 @@ static int max8925_bat_get_prop(struct power_supply *psy,
 		if (info->bat_online) {
 			ret = start_measure(info, MEASURE_ISNS);
 			if (ret >= 0) {
-				tmp = (long long int)ret * 6250 / 4096 - 3125;
-				ret = (int)tmp;
+				/* assume r_sns is 0.02 */
+				ret = ((ret * 6250) - 3125) /* uA */;
 				val->intval = 0;
 				if (ret > 0)
 					val->intval = ret; /* unit is mA */
@@ -365,13 +362,14 @@ static __devinit int max8925_init_charger(struct max8925_chip *chip,
 	int ret;
 
 	REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_OVP, "ac-ovp");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_F, "ac-remove");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_R, "ac-insert");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_USB_OVP, "usb-ovp");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_USB_F, "usb-remove");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_USB_R, "usb-insert");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_R, "batt-temp-in-range");
-	REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_F, "batt-temp-out-range");
+	if (!info->no_insert_detect) {
+		REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_F, "ac-remove");
+		REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_R, "ac-insert");
+	}
+	if (!info->no_temp_support) {
+		REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_R, "batt-temp-in-range");
+		REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_F, "batt-temp-out-range");
+	}
 	REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_F, "vsys-high");
 	REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_R, "vsys-low");
 	REQUEST_IRQ(MAX8925_IRQ_VCHG_RST, "charger-reset");
@@ -379,9 +377,15 @@ static __devinit int max8925_init_charger(struct max8925_chip *chip,
 	REQUEST_IRQ(MAX8925_IRQ_VCHG_TOPOFF, "charger-topoff");
 	REQUEST_IRQ(MAX8925_IRQ_VCHG_TMR_FAULT, "charger-timer-expire");
 
-	info->ac_online = 0;
 	info->usb_online = 0;
 	info->bat_online = 0;
+
+	/* check for power - can miss interrupt at boot time */
+	if (start_measure(info, MEASURE_VCHG) * 2000 > 500000)
+		info->ac_online = 1;
+	else
+		info->ac_online = 0;
+
 	ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
 	if (ret >= 0) {
 		/*
@@ -449,6 +453,8 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
 	info->ac.properties = max8925_ac_props;
 	info->ac.num_properties = ARRAY_SIZE(max8925_ac_props);
 	info->ac.get_property = max8925_ac_get_prop;
+	info->ac.supplied_to = pdata->supplied_to;
+	info->ac.num_supplicants = pdata->num_supplicants;
 	ret = power_supply_register(&pdev->dev, &info->ac);
 	if (ret)
 		goto out;
@@ -459,6 +465,9 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
 	info->usb.properties = max8925_usb_props;
 	info->usb.num_properties = ARRAY_SIZE(max8925_usb_props);
 	info->usb.get_property = max8925_usb_get_prop;
+	info->usb.supplied_to = pdata->supplied_to;
+	info->usb.num_supplicants = pdata->num_supplicants;
+
 	ret = power_supply_register(&pdev->dev, &info->usb);
 	if (ret)
 		goto out_usb;
@@ -478,6 +487,8 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
 	info->topoff_threshold = pdata->topoff_threshold;
 	info->fast_charge = pdata->fast_charge;
 	info->set_charger = pdata->set_charger;
+	info->no_temp_support = pdata->no_temp_support;
+	info->no_insert_detect = pdata->no_insert_detect;
 
 	max8925_init_charger(chip, info);
 	return 0;
@@ -512,17 +523,7 @@ static struct platform_driver max8925_power_driver = {
 	},
 };
 
-static int __init max8925_power_init(void)
-{
-	return platform_driver_register(&max8925_power_driver);
-}
-module_init(max8925_power_init);
-
-static void __exit max8925_power_exit(void)
-{
-	platform_driver_unregister(&max8925_power_driver);
-}
-module_exit(max8925_power_exit);
+module_platform_driver(max8925_power_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Power supply driver for MAX8925");
diff --git a/drivers/power/max8997_charger.c b/drivers/power/max8997_charger.c
index a23317d..6e88c5d 100644
--- a/drivers/power/max8997_charger.c
+++ b/drivers/power/max8997_charger.c
@@ -19,7 +19,6 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#include <linux/module.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -98,7 +97,7 @@ static __devinit int max8997_battery_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	if (pdata->eoc_mA) {
-		u8 val = (pdata->eoc_mA - 50) / 10;
+		int val = (pdata->eoc_mA - 50) / 10;
 		if (val < 0)
 			val = 0;
 		if (val > 0xf)
@@ -179,6 +178,7 @@ static int __devexit max8997_battery_remove(struct platform_device *pdev)
 
 static const struct platform_device_id max8997_battery_id[] = {
 	{ "max8997-battery", 0 },
+	{ }
 };
 
 static struct platform_driver max8997_battery_driver = {
diff --git a/drivers/power/max8998_charger.c b/drivers/power/max8998_charger.c
index 93e3bb4..9b3f2bf5 100644
--- a/drivers/power/max8998_charger.c
+++ b/drivers/power/max8998_charger.c
@@ -154,6 +154,7 @@ static __devinit int max8998_battery_probe(struct platform_device *pdev)
 	case 0:
 		dev_dbg(max8998->dev,
 			"Full Timeout not set: leave it unchanged.\n");
+		break;
 	default:
 		dev_err(max8998->dev, "Invalid Full Timeout value\n");
 		ret = -EINVAL;
@@ -190,6 +191,7 @@ static int __devexit max8998_battery_remove(struct platform_device *pdev)
 
 static const struct platform_device_id max8998_battery_id[] = {
 	{ "max8998-battery", TYPE_MAX8998 },
+	{ }
 };
 
 static struct platform_driver max8998_battery_driver = {
@@ -202,17 +204,7 @@ static struct platform_driver max8998_battery_driver = {
 	.id_table = max8998_battery_id,
 };
 
-static int __init max8998_battery_init(void)
-{
-	return platform_driver_register(&max8998_battery_driver);
-}
-module_init(max8998_battery_init);
-
-static void __exit max8998_battery_cleanup(void)
-{
-	platform_driver_unregister(&max8998_battery_driver);
-}
-module_exit(max8998_battery_cleanup);
+module_platform_driver(max8998_battery_driver);
 
 MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 0b0ff3a..7385092 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -519,29 +519,35 @@ static struct device_attribute olpc_bat_error = {
  *		Initialisation
  *********************************************************************/
 
-static struct platform_device *bat_pdev;
-
 static struct power_supply olpc_bat = {
+	.name = "olpc-battery",
 	.get_property = olpc_bat_get_property,
 	.use_for_apm = 1,
 };
 
-void olpc_battery_trigger_uevent(unsigned long cause)
+static int olpc_battery_suspend(struct platform_device *pdev,
+				pm_message_t state)
 {
-	if (cause & EC_SCI_SRC_ACPWR)
-		kobject_uevent(&olpc_ac.dev->kobj, KOBJ_CHANGE);
-	if (cause & (EC_SCI_SRC_BATERR|EC_SCI_SRC_BATSOC|EC_SCI_SRC_BATTERY))
-		kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE);
+	if (device_may_wakeup(olpc_ac.dev))
+		olpc_ec_wakeup_set(EC_SCI_SRC_ACPWR);
+	else
+		olpc_ec_wakeup_clear(EC_SCI_SRC_ACPWR);
+
+	if (device_may_wakeup(olpc_bat.dev))
+		olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
+				   | EC_SCI_SRC_BATERR);
+	else
+		olpc_ec_wakeup_clear(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
+				     | EC_SCI_SRC_BATERR);
+
+	return 0;
 }
 
-static int __init olpc_bat_init(void)
+static int __devinit olpc_battery_probe(struct platform_device *pdev)
 {
-	int ret = 0;
+	int ret;
 	uint8_t status;
 
-	if (!olpc_platform_info.ecver)
-		return -ENXIO;
-
 	/*
 	 * We've seen a number of EC protocol changes; this driver requires
 	 * the latest EC protocol, supported by 0x44 and above.
@@ -558,15 +564,10 @@ static int __init olpc_bat_init(void)
 
 	/* Ignore the status. It doesn't actually matter */
 
-	bat_pdev = platform_device_register_simple("olpc-battery", 0, NULL, 0);
-	if (IS_ERR(bat_pdev))
-		return PTR_ERR(bat_pdev);
-
-	ret = power_supply_register(&bat_pdev->dev, &olpc_ac);
+	ret = power_supply_register(&pdev->dev, &olpc_ac);
 	if (ret)
-		goto ac_failed;
+		return ret;
 
-	olpc_bat.name = bat_pdev->name;
 	if (olpc_board_at_least(olpc_board_pre(0xd0))) { /* XO-1.5 */
 		olpc_bat.properties = olpc_xo15_bat_props;
 		olpc_bat.num_properties = ARRAY_SIZE(olpc_xo15_bat_props);
@@ -575,7 +576,7 @@ static int __init olpc_bat_init(void)
 		olpc_bat.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
 	}
 
-	ret = power_supply_register(&bat_pdev->dev, &olpc_bat);
+	ret = power_supply_register(&pdev->dev, &olpc_bat);
 	if (ret)
 		goto battery_failed;
 
@@ -587,7 +588,12 @@ static int __init olpc_bat_init(void)
 	if (ret)
 		goto error_failed;
 
-	goto success;
+	if (olpc_ec_wakeup_available()) {
+		device_set_wakeup_capable(olpc_ac.dev, true);
+		device_set_wakeup_capable(olpc_bat.dev, true);
+	}
+
+	return 0;
 
 error_failed:
 	device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
@@ -595,23 +601,36 @@ eeprom_failed:
 	power_supply_unregister(&olpc_bat);
 battery_failed:
 	power_supply_unregister(&olpc_ac);
-ac_failed:
-	platform_device_unregister(bat_pdev);
-success:
 	return ret;
 }
 
-static void __exit olpc_bat_exit(void)
+static int __devexit olpc_battery_remove(struct platform_device *pdev)
 {
 	device_remove_file(olpc_bat.dev, &olpc_bat_error);
 	device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
 	power_supply_unregister(&olpc_bat);
 	power_supply_unregister(&olpc_ac);
-	platform_device_unregister(bat_pdev);
+	return 0;
 }
 
-module_init(olpc_bat_init);
-module_exit(olpc_bat_exit);
+static const struct of_device_id olpc_battery_ids[] __devinitconst = {
+	{ .compatible = "olpc,xo1-battery" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, olpc_battery_ids);
+
+static struct platform_driver olpc_battery_driver = {
+	.driver = {
+		.name = "olpc-battery",
+		.owner = THIS_MODULE,
+		.of_match_table = olpc_battery_ids,
+	},
+	.probe = olpc_battery_probe,
+	.remove = __devexit_p(olpc_battery_remove),
+	.suspend = olpc_battery_suspend,
+};
+
+module_platform_driver(olpc_battery_driver);
 
 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
index 4fa52e1..3d1e9ef 100644
--- a/drivers/power/pcf50633-charger.c
+++ b/drivers/power/pcf50633-charger.c
@@ -474,17 +474,7 @@ static struct platform_driver pcf50633_mbc_driver = {
 	.remove = __devexit_p(pcf50633_mbc_remove),
 };
 
-static int __init pcf50633_mbc_init(void)
-{
-	return platform_driver_register(&pcf50633_mbc_driver);
-}
-module_init(pcf50633_mbc_init);
-
-static void __exit pcf50633_mbc_exit(void)
-{
-	platform_driver_unregister(&pcf50633_mbc_driver);
-}
-module_exit(pcf50633_mbc_exit);
+module_platform_driver(pcf50633_mbc_driver);
 
 MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
 MODULE_DESCRIPTION("PCF50633 mbc driver");
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index 69f8aa3..fd49689 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
+#include <linux/notifier.h>
 #include <linux/power_supply.h>
 #include <linux/pda_power.h>
 #include <linux/regulator/consumer.h>
@@ -40,7 +41,9 @@ static int polling;
 
 #ifdef CONFIG_USB_OTG_UTILS
 static struct otg_transceiver *transceiver;
+static struct notifier_block otg_nb;
 #endif
+
 static struct regulator *ac_draw;
 
 enum {
@@ -222,7 +225,42 @@ static void polling_timer_func(unsigned long unused)
 #ifdef CONFIG_USB_OTG_UTILS
 static int otg_is_usb_online(void)
 {
-	return (transceiver->state == OTG_STATE_B_PERIPHERAL);
+	return (transceiver->last_event == USB_EVENT_VBUS ||
+		transceiver->last_event == USB_EVENT_ENUMERATED);
+}
+
+static int otg_is_ac_online(void)
+{
+	return (transceiver->last_event == USB_EVENT_CHARGER);
+}
+
+static int otg_handle_notification(struct notifier_block *nb,
+		unsigned long event, void *unused)
+{
+	switch (event) {
+	case USB_EVENT_CHARGER:
+		ac_status = PDA_PSY_TO_CHANGE;
+		break;
+	case USB_EVENT_VBUS:
+	case USB_EVENT_ENUMERATED:
+		usb_status = PDA_PSY_TO_CHANGE;
+		break;
+	case USB_EVENT_NONE:
+		ac_status = PDA_PSY_TO_CHANGE;
+		usb_status = PDA_PSY_TO_CHANGE;
+		break;
+	default:
+		return NOTIFY_OK;
+	}
+
+	/*
+	 * Wait a bit before reading ac/usb line status and setting charger,
+	 * because ac/usb status readings may lag from irq.
+	 */
+	mod_timer(&charger_timer,
+		  jiffies + msecs_to_jiffies(pdata->wait_for_status));
+
+	return NOTIFY_OK;
 }
 #endif
 
@@ -282,6 +320,16 @@ static int pda_power_probe(struct platform_device *pdev)
 		ret = PTR_ERR(ac_draw);
 	}
 
+#ifdef CONFIG_USB_OTG_UTILS
+	transceiver = otg_get_transceiver();
+	if (transceiver && !pdata->is_usb_online) {
+		pdata->is_usb_online = otg_is_usb_online;
+	}
+	if (transceiver && !pdata->is_ac_online) {
+		pdata->is_ac_online = otg_is_ac_online;
+	}
+#endif
+
 	if (pdata->is_ac_online) {
 		ret = power_supply_register(&pdev->dev, &pda_psy_ac);
 		if (ret) {
@@ -303,13 +351,6 @@ static int pda_power_probe(struct platform_device *pdev)
 		}
 	}
 
-#ifdef CONFIG_USB_OTG_UTILS
-	transceiver = otg_get_transceiver();
-	if (transceiver && !pdata->is_usb_online) {
-		pdata->is_usb_online = otg_is_usb_online;
-	}
-#endif
-
 	if (pdata->is_usb_online) {
 		ret = power_supply_register(&pdev->dev, &pda_psy_usb);
 		if (ret) {
@@ -331,6 +372,18 @@ static int pda_power_probe(struct platform_device *pdev)
 		}
 	}
 
+#ifdef CONFIG_USB_OTG_UTILS
+	if (transceiver && pdata->use_otg_notifier) {
+		otg_nb.notifier_call = otg_handle_notification;
+		ret = otg_register_notifier(transceiver, &otg_nb);
+		if (ret) {
+			dev_err(dev, "failure to register otg notifier\n");
+			goto otg_reg_notifier_failed;
+		}
+		polling = 0;
+	}
+#endif
+
 	if (polling) {
 		dev_dbg(dev, "will poll for status\n");
 		setup_timer(&polling_timer, polling_timer_func, 0);
@@ -343,6 +396,11 @@ static int pda_power_probe(struct platform_device *pdev)
 
 	return 0;
 
+#ifdef CONFIG_USB_OTG_UTILS
+otg_reg_notifier_failed:
+	if (pdata->is_usb_online && usb_irq)
+		free_irq(usb_irq->start, &pda_psy_usb);
+#endif
 usb_irq_failed:
 	if (pdata->is_usb_online)
 		power_supply_unregister(&pda_psy_usb);
@@ -440,8 +498,6 @@ static int pda_power_resume(struct platform_device *pdev)
 #define pda_power_resume NULL
 #endif /* CONFIG_PM */
 
-MODULE_ALIAS("platform:pda-power");
-
 static struct platform_driver pda_power_pdrv = {
 	.driver = {
 		.name = "pda-power",
@@ -452,17 +508,8 @@ static struct platform_driver pda_power_pdrv = {
 	.resume = pda_power_resume,
 };
 
-static int __init pda_power_init(void)
-{
-	return platform_driver_register(&pda_power_pdrv);
-}
+module_platform_driver(pda_power_pdrv);
 
-static void __exit pda_power_exit(void)
-{
-	platform_driver_unregister(&pda_power_pdrv);
-}
-
-module_init(pda_power_init);
-module_exit(pda_power_exit);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
+MODULE_ALIAS("platform:pda-power");
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 329b46b..6ad6127 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -98,7 +98,9 @@ static int __power_supply_is_system_supplied(struct device *dev, void *data)
 {
 	union power_supply_propval ret = {0,};
 	struct power_supply *psy = dev_get_drvdata(dev);
+	unsigned int *count = data;
 
+	(*count)++;
 	if (psy->type != POWER_SUPPLY_TYPE_BATTERY) {
 		if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
 			return 0;
@@ -111,10 +113,18 @@ static int __power_supply_is_system_supplied(struct device *dev, void *data)
 int power_supply_is_system_supplied(void)
 {
 	int error;
+	unsigned int count = 0;
 
-	error = class_for_each_device(power_supply_class, NULL, NULL,
+	error = class_for_each_device(power_supply_class, NULL, &count,
 				      __power_supply_is_system_supplied);
 
+	/*
+	 * If no power class device was found at all, most probably we are
+	 * running on a desktop system, so assume we are on mains power.
+	 */
+	if (count == 0)
+		return 1;
+
 	return error;
 }
 EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
@@ -147,6 +157,12 @@ struct power_supply *power_supply_get_by_name(char *name)
 }
 EXPORT_SYMBOL_GPL(power_supply_get_by_name);
 
+int power_supply_powers(struct power_supply *psy, struct device *dev)
+{
+	return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");
+}
+EXPORT_SYMBOL_GPL(power_supply_powers);
+
 static void power_supply_dev_release(struct device *dev)
 {
 	pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
@@ -202,6 +218,7 @@ EXPORT_SYMBOL_GPL(power_supply_register);
 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);
 	device_unregister(psy->dev);
 }
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index e95cd65..b52b57c 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -43,7 +43,7 @@ static ssize_t power_supply_show_property(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf) {
 	static char *type_text[] = {
-		"Battery", "UPS", "Mains", "USB",
+		"Unknown", "Battery", "UPS", "Mains", "USB",
 		"USB_DCP", "USB_CDP", "USB_ACA"
 	};
 	static char *status_text[] = {
@@ -63,6 +63,9 @@ static ssize_t power_supply_show_property(struct device *dev,
 	static char *capacity_level_text[] = {
 		"Unknown", "Critical", "Low", "Normal", "High", "Full"
 	};
+	static char *scope_text[] = {
+		"Unknown", "System", "Device"
+	};
 	ssize_t ret = 0;
 	struct power_supply *psy = dev_get_drvdata(dev);
 	const ptrdiff_t off = attr - power_supply_attrs;
@@ -78,8 +81,8 @@ static ssize_t power_supply_show_property(struct device *dev,
 			dev_dbg(dev, "driver has no data for `%s' property\n",
 				attr->attr.name);
 		else if (ret != -ENODEV)
-			dev_err(dev, "driver failed to report `%s' property\n",
-				attr->attr.name);
+			dev_err(dev, "driver failed to report `%s' property: %zd\n",
+				attr->attr.name, ret);
 		return ret;
 	}
 
@@ -95,6 +98,8 @@ static ssize_t power_supply_show_property(struct device *dev,
 		return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
 	else if (off == POWER_SUPPLY_PROP_TYPE)
 		return sprintf(buf, "%s\n", type_text[value.intval]);
+	else if (off == POWER_SUPPLY_PROP_SCOPE)
+		return sprintf(buf, "%s\n", scope_text[value.intval]);
 	else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
 		return sprintf(buf, "%s\n", value.strval);
 
@@ -167,6 +172,7 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(time_to_full_now),
 	POWER_SUPPLY_ATTR(time_to_full_avg),
 	POWER_SUPPLY_ATTR(type),
+	POWER_SUPPLY_ATTR(scope),
 	/* Properties of type `const char *' */
 	POWER_SUPPLY_ATTR(model_name),
 	POWER_SUPPLY_ATTR(manufacturer),
diff --git a/drivers/power/s3c_adc_battery.c b/drivers/power/s3c_adc_battery.c
index d32d0d7..8b804a5 100644
--- a/drivers/power/s3c_adc_battery.c
+++ b/drivers/power/s3c_adc_battery.c
@@ -47,6 +47,22 @@ static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
 		msecs_to_jiffies(JITTER_DELAY));
 }
 
+static int gather_samples(struct s3c_adc_client *client, int num, int channel)
+{
+	int value, i;
+
+	/* default to 1 if nothing is set */
+	if (num < 1)
+		num = 1;
+
+	value = 0;
+	for (i = 0; i < num; i++)
+		value += s3c_adc_read(client, channel);
+	value /= num;
+
+	return value;
+}
+
 static enum power_supply_property s3c_adc_backup_bat_props[] = {
 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
 	POWER_SUPPLY_PROP_VOLTAGE_MIN,
@@ -67,7 +83,8 @@ static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
 	if (bat->volt_value < 0 ||
 		jiffies_to_msecs(jiffies - bat->timestamp) >
 			BAT_POLL_INTERVAL) {
-		bat->volt_value = s3c_adc_read(bat->client,
+		bat->volt_value = gather_samples(bat->client,
+			bat->pdata->backup_volt_samples,
 			bat->pdata->backup_volt_channel);
 		bat->volt_value *= bat->pdata->backup_volt_mult;
 		bat->timestamp = jiffies;
@@ -139,9 +156,11 @@ static int s3c_adc_bat_get_property(struct power_supply *psy,
 	if (bat->volt_value < 0 || bat->cur_value < 0 ||
 		jiffies_to_msecs(jiffies - bat->timestamp) >
 			BAT_POLL_INTERVAL) {
-		bat->volt_value = s3c_adc_read(bat->client,
+		bat->volt_value = gather_samples(bat->client,
+			bat->pdata->volt_samples,
 			bat->pdata->volt_channel) * bat->pdata->volt_mult;
-		bat->cur_value = s3c_adc_read(bat->client,
+		bat->cur_value = gather_samples(bat->client,
+			bat->pdata->current_samples,
 			bat->pdata->current_channel) * bat->pdata->current_mult;
 		bat->timestamp = jiffies;
 	}
@@ -421,17 +440,7 @@ static struct platform_driver s3c_adc_bat_driver = {
 	.resume		= s3c_adc_bat_resume,
 };
 
-static int __init s3c_adc_bat_init(void)
-{
-	return platform_driver_register(&s3c_adc_bat_driver);
-}
-module_init(s3c_adc_bat_init);
-
-static void __exit s3c_adc_bat_exit(void)
-{
-	platform_driver_unregister(&s3c_adc_bat_driver);
-}
-module_exit(s3c_adc_bat_exit);
+module_platform_driver(s3c_adc_bat_driver);
 
 MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
 MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver");
diff --git a/drivers/power/bq20z75.c b/drivers/power/sbs-battery.c
index 9c5e5be..9ff8af0 100644
--- a/drivers/power/bq20z75.c
+++ b/drivers/power/sbs-battery.c
@@ -1,5 +1,5 @@
 /*
- * Gas Gauge driver for TI's BQ20Z75
+ * Gas Gauge driver for SBS Compliant Batteries
  *
  * Copyright (c) 2010, NVIDIA Corporation.
  *
@@ -28,7 +28,7 @@
 #include <linux/interrupt.h>
 #include <linux/gpio.h>
 
-#include <linux/power/bq20z75.h>
+#include <linux/power/sbs-battery.h>
 
 enum {
 	REG_MANUFACTURER_DATA,
@@ -53,7 +53,7 @@ enum {
 /* Battery Mode defines */
 #define BATTERY_MODE_OFFSET		0x03
 #define BATTERY_MODE_MASK		0x8000
-enum bq20z75_battery_mode {
+enum sbs_battery_mode {
 	BATTERY_MODE_AMPS,
 	BATTERY_MODE_WATTS
 };
@@ -67,62 +67,56 @@ enum bq20z75_battery_mode {
 #define BATTERY_FULL_CHARGED		0x20
 #define BATTERY_FULL_DISCHARGED		0x10
 
-#define BQ20Z75_DATA(_psp, _addr, _min_value, _max_value) { \
+#define SBS_DATA(_psp, _addr, _min_value, _max_value) { \
 	.psp = _psp, \
 	.addr = _addr, \
 	.min_value = _min_value, \
 	.max_value = _max_value, \
 }
 
-static const struct bq20z75_device_data {
+static const struct chip_data {
 	enum power_supply_property psp;
 	u8 addr;
 	int min_value;
 	int max_value;
-} bq20z75_data[] = {
+} sbs_data[] = {
 	[REG_MANUFACTURER_DATA] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535),
 	[REG_TEMPERATURE] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535),
 	[REG_VOLTAGE] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 20000),
+		SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 20000),
 	[REG_CURRENT] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768,
-			32767),
+		SBS_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768, 32767),
 	[REG_CAPACITY] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0E, 0, 100),
+		SBS_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0E, 0, 100),
 	[REG_REMAINING_CAPACITY] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535),
 	[REG_REMAINING_CAPACITY_CHARGE] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_CHARGE_NOW, 0x0F, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_CHARGE_NOW, 0x0F, 0, 65535),
 	[REG_FULL_CHARGE_CAPACITY] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535),
 	[REG_FULL_CHARGE_CAPACITY_CHARGE] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_CHARGE_FULL, 0x10, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL, 0x10, 0, 65535),
 	[REG_TIME_TO_EMPTY] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0,
-			65535),
+		SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0, 65535),
 	[REG_TIME_TO_FULL] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0,
-			65535),
+		SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0, 65535),
 	[REG_STATUS] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
 	[REG_CYCLE_COUNT] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
 	[REG_DESIGN_CAPACITY] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0,
-			65535),
+		SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0, 65535),
 	[REG_DESIGN_CAPACITY_CHARGE] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0,
-			65535),
+		SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0, 65535),
 	[REG_DESIGN_VOLTAGE] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0,
-			65535),
+		SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0, 65535),
 	[REG_SERIAL_NUMBER] =
-		BQ20Z75_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
+		SBS_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
 };
 
-static enum power_supply_property bq20z75_properties[] = {
+static enum power_supply_property sbs_properties[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_HEALTH,
 	POWER_SUPPLY_PROP_PRESENT,
@@ -144,10 +138,10 @@ static enum power_supply_property bq20z75_properties[] = {
 	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 };
 
-struct bq20z75_info {
+struct sbs_info {
 	struct i2c_client		*client;
 	struct power_supply		power_supply;
-	struct bq20z75_platform_data	*pdata;
+	struct sbs_platform_data	*pdata;
 	bool				is_present;
 	bool				gpio_detect;
 	bool				enable_detection;
@@ -158,14 +152,14 @@ struct bq20z75_info {
 	int				ignore_changes;
 };
 
-static int bq20z75_read_word_data(struct i2c_client *client, u8 address)
+static int sbs_read_word_data(struct i2c_client *client, u8 address)
 {
-	struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
+	struct sbs_info *chip = i2c_get_clientdata(client);
 	s32 ret = 0;
 	int retries = 1;
 
-	if (bq20z75_device->pdata)
-		retries = max(bq20z75_device->pdata->i2c_retry_count + 1, 1);
+	if (chip->pdata)
+		retries = max(chip->pdata->i2c_retry_count + 1, 1);
 
 	while (retries > 0) {
 		ret = i2c_smbus_read_word_data(client, address);
@@ -184,15 +178,15 @@ static int bq20z75_read_word_data(struct i2c_client *client, u8 address)
 	return le16_to_cpu(ret);
 }
 
-static int bq20z75_write_word_data(struct i2c_client *client, u8 address,
+static int sbs_write_word_data(struct i2c_client *client, u8 address,
 	u16 value)
 {
-	struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
+	struct sbs_info *chip = i2c_get_clientdata(client);
 	s32 ret = 0;
 	int retries = 1;
 
-	if (bq20z75_device->pdata)
-		retries = max(bq20z75_device->pdata->i2c_retry_count + 1, 1);
+	if (chip->pdata)
+		retries = max(chip->pdata->i2c_retry_count + 1, 1);
 
 	while (retries > 0) {
 		ret = i2c_smbus_write_word_data(client, address,
@@ -212,44 +206,41 @@ static int bq20z75_write_word_data(struct i2c_client *client, u8 address,
 	return 0;
 }
 
-static int bq20z75_get_battery_presence_and_health(
+static int sbs_get_battery_presence_and_health(
 	struct i2c_client *client, enum power_supply_property psp,
 	union power_supply_propval *val)
 {
 	s32 ret;
-	struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
+	struct sbs_info *chip = i2c_get_clientdata(client);
 
 	if (psp == POWER_SUPPLY_PROP_PRESENT &&
-		bq20z75_device->gpio_detect) {
-		ret = gpio_get_value(
-			bq20z75_device->pdata->battery_detect);
-		if (ret == bq20z75_device->pdata->battery_detect_present)
+		chip->gpio_detect) {
+		ret = gpio_get_value(chip->pdata->battery_detect);
+		if (ret == chip->pdata->battery_detect_present)
 			val->intval = 1;
 		else
 			val->intval = 0;
-		bq20z75_device->is_present = val->intval;
+		chip->is_present = val->intval;
 		return ret;
 	}
 
 	/* Write to ManufacturerAccess with
 	 * ManufacturerAccess command and then
 	 * read the status */
-	ret = bq20z75_write_word_data(client,
-		bq20z75_data[REG_MANUFACTURER_DATA].addr,
-		MANUFACTURER_ACCESS_STATUS);
+	ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr,
+					MANUFACTURER_ACCESS_STATUS);
 	if (ret < 0) {
 		if (psp == POWER_SUPPLY_PROP_PRESENT)
 			val->intval = 0; /* battery removed */
 		return ret;
 	}
 
-	ret = bq20z75_read_word_data(client,
-		bq20z75_data[REG_MANUFACTURER_DATA].addr);
+	ret = sbs_read_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr);
 	if (ret < 0)
 		return ret;
 
-	if (ret < bq20z75_data[REG_MANUFACTURER_DATA].min_value ||
-	    ret > bq20z75_data[REG_MANUFACTURER_DATA].max_value) {
+	if (ret < sbs_data[REG_MANUFACTURER_DATA].min_value ||
+	    ret > sbs_data[REG_MANUFACTURER_DATA].max_value) {
 		val->intval = 0;
 		return 0;
 	}
@@ -279,24 +270,23 @@ static int bq20z75_get_battery_presence_and_health(
 	return 0;
 }
 
-static int bq20z75_get_battery_property(struct i2c_client *client,
+static int sbs_get_battery_property(struct i2c_client *client,
 	int reg_offset, enum power_supply_property psp,
 	union power_supply_propval *val)
 {
-	struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
+	struct sbs_info *chip = i2c_get_clientdata(client);
 	s32 ret;
 
-	ret = bq20z75_read_word_data(client,
-		bq20z75_data[reg_offset].addr);
+	ret = sbs_read_word_data(client, sbs_data[reg_offset].addr);
 	if (ret < 0)
 		return ret;
 
 	/* returned values are 16 bit */
-	if (bq20z75_data[reg_offset].min_value < 0)
+	if (sbs_data[reg_offset].min_value < 0)
 		ret = (s16)ret;
 
-	if (ret >= bq20z75_data[reg_offset].min_value &&
-	    ret <= bq20z75_data[reg_offset].max_value) {
+	if (ret >= sbs_data[reg_offset].min_value &&
+	    ret <= sbs_data[reg_offset].max_value) {
 		val->intval = ret;
 		if (psp != POWER_SUPPLY_PROP_STATUS)
 			return 0;
@@ -310,12 +300,12 @@ static int bq20z75_get_battery_property(struct i2c_client *client,
 		else
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
 
-		if (bq20z75_device->poll_time == 0)
-			bq20z75_device->last_state = val->intval;
-		else if (bq20z75_device->last_state != val->intval) {
-			cancel_delayed_work_sync(&bq20z75_device->work);
-			power_supply_changed(&bq20z75_device->power_supply);
-			bq20z75_device->poll_time = 0;
+		if (chip->poll_time == 0)
+			chip->last_state = val->intval;
+		else if (chip->last_state != val->intval) {
+			cancel_delayed_work_sync(&chip->work);
+			power_supply_changed(&chip->power_supply);
+			chip->poll_time = 0;
 		}
 	} else {
 		if (psp == POWER_SUPPLY_PROP_STATUS)
@@ -327,7 +317,7 @@ static int bq20z75_get_battery_property(struct i2c_client *client,
 	return 0;
 }
 
-static void  bq20z75_unit_adjustment(struct i2c_client *client,
+static void  sbs_unit_adjustment(struct i2c_client *client,
 	enum power_supply_property psp, union power_supply_propval *val)
 {
 #define BASE_UNIT_CONVERSION		1000
@@ -338,7 +328,7 @@ static void  bq20z75_unit_adjustment(struct i2c_client *client,
 	case POWER_SUPPLY_PROP_ENERGY_NOW:
 	case POWER_SUPPLY_PROP_ENERGY_FULL:
 	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
-		/* bq20z75 provides energy in units of 10mWh.
+		/* sbs provides energy in units of 10mWh.
 		 * Convert to µWh
 		 */
 		val->intval *= BATTERY_MODE_CAP_MULT_WATT;
@@ -354,7 +344,7 @@ static void  bq20z75_unit_adjustment(struct i2c_client *client,
 		break;
 
 	case POWER_SUPPLY_PROP_TEMP:
-		/* bq20z75 provides battery temperature in 0.1K
+		/* sbs provides battery temperature in 0.1K
 		 * so convert it to 0.1°C
 		 */
 		val->intval -= TEMP_KELVIN_TO_CELSIUS;
@@ -362,7 +352,7 @@ static void  bq20z75_unit_adjustment(struct i2c_client *client,
 
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
 	case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
-		/* bq20z75 provides time to empty and time to full in minutes.
+		/* sbs provides time to empty and time to full in minutes.
 		 * Convert to seconds
 		 */
 		val->intval *= TIME_UNIT_CONVERSION;
@@ -374,13 +364,12 @@ static void  bq20z75_unit_adjustment(struct i2c_client *client,
 	}
 }
 
-static enum bq20z75_battery_mode
-bq20z75_set_battery_mode(struct i2c_client *client,
-	enum bq20z75_battery_mode mode)
+static enum sbs_battery_mode sbs_set_battery_mode(struct i2c_client *client,
+	enum sbs_battery_mode mode)
 {
 	int ret, original_val;
 
-	original_val = bq20z75_read_word_data(client, BATTERY_MODE_OFFSET);
+	original_val = sbs_read_word_data(client, BATTERY_MODE_OFFSET);
 	if (original_val < 0)
 		return original_val;
 
@@ -392,68 +381,67 @@ bq20z75_set_battery_mode(struct i2c_client *client,
 	else
 		ret = original_val | BATTERY_MODE_MASK;
 
-	ret = bq20z75_write_word_data(client, BATTERY_MODE_OFFSET, ret);
+	ret = sbs_write_word_data(client, BATTERY_MODE_OFFSET, ret);
 	if (ret < 0)
 		return ret;
 
 	return original_val & BATTERY_MODE_MASK;
 }
 
-static int bq20z75_get_battery_capacity(struct i2c_client *client,
+static int sbs_get_battery_capacity(struct i2c_client *client,
 	int reg_offset, enum power_supply_property psp,
 	union power_supply_propval *val)
 {
 	s32 ret;
-	enum bq20z75_battery_mode mode = BATTERY_MODE_WATTS;
+	enum sbs_battery_mode mode = BATTERY_MODE_WATTS;
 
 	if (power_supply_is_amp_property(psp))
 		mode = BATTERY_MODE_AMPS;
 
-	mode = bq20z75_set_battery_mode(client, mode);
+	mode = sbs_set_battery_mode(client, mode);
 	if (mode < 0)
 		return mode;
 
-	ret = bq20z75_read_word_data(client, bq20z75_data[reg_offset].addr);
+	ret = sbs_read_word_data(client, sbs_data[reg_offset].addr);
 	if (ret < 0)
 		return ret;
 
 	if (psp == POWER_SUPPLY_PROP_CAPACITY) {
-		/* bq20z75 spec says that this can be >100 %
+		/* sbs spec says that this can be >100 %
 		* even if max value is 100 % */
 		val->intval = min(ret, 100);
 	} else
 		val->intval = ret;
 
-	ret = bq20z75_set_battery_mode(client, mode);
+	ret = sbs_set_battery_mode(client, mode);
 	if (ret < 0)
 		return ret;
 
 	return 0;
 }
 
-static char bq20z75_serial[5];
-static int bq20z75_get_battery_serial_number(struct i2c_client *client,
+static char sbs_serial[5];
+static int sbs_get_battery_serial_number(struct i2c_client *client,
 	union power_supply_propval *val)
 {
 	int ret;
 
-	ret = bq20z75_read_word_data(client,
-		bq20z75_data[REG_SERIAL_NUMBER].addr);
+	ret = sbs_read_word_data(client, sbs_data[REG_SERIAL_NUMBER].addr);
 	if (ret < 0)
 		return ret;
 
-	ret = sprintf(bq20z75_serial, "%04x", ret);
-	val->strval = bq20z75_serial;
+	ret = sprintf(sbs_serial, "%04x", ret);
+	val->strval = sbs_serial;
 
 	return 0;
 }
 
-static int bq20z75_get_property_index(struct i2c_client *client,
+static int sbs_get_property_index(struct i2c_client *client,
 	enum power_supply_property psp)
 {
 	int count;
-	for (count = 0; count < ARRAY_SIZE(bq20z75_data); count++)
-		if (psp == bq20z75_data[count].psp)
+	for (count = 0; count < ARRAY_SIZE(sbs_data); count++)
+		if (psp == sbs_data[count].psp)
 			return count;
 
 	dev_warn(&client->dev,
@@ -462,19 +450,19 @@ static int bq20z75_get_property_index(struct i2c_client *client,
 	return -EINVAL;
 }
 
-static int bq20z75_get_property(struct power_supply *psy,
+static int sbs_get_property(struct power_supply *psy,
 	enum power_supply_property psp,
 	union power_supply_propval *val)
 {
 	int ret = 0;
-	struct bq20z75_info *bq20z75_device = container_of(psy,
-				struct bq20z75_info, power_supply);
-	struct i2c_client *client = bq20z75_device->client;
+	struct sbs_info *chip = container_of(psy,
+				struct sbs_info, power_supply);
+	struct i2c_client *client = chip->client;
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_PRESENT:
 	case POWER_SUPPLY_PROP_HEALTH:
-		ret = bq20z75_get_battery_presence_and_health(client, psp, val);
+		ret = sbs_get_battery_presence_and_health(client, psp, val);
 		if (psp == POWER_SUPPLY_PROP_PRESENT)
 			return 0;
 		break;
@@ -490,15 +478,15 @@ static int bq20z75_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CHARGE_FULL:
 	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 	case POWER_SUPPLY_PROP_CAPACITY:
-		ret = bq20z75_get_property_index(client, psp);
+		ret = sbs_get_property_index(client, psp);
 		if (ret < 0)
 			break;
 
-		ret = bq20z75_get_battery_capacity(client, ret, psp, val);
+		ret = sbs_get_battery_capacity(client, ret, psp, val);
 		break;
 
 	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
-		ret = bq20z75_get_battery_serial_number(client, val);
+		ret = sbs_get_battery_serial_number(client, val);
 		break;
 
 	case POWER_SUPPLY_PROP_STATUS:
@@ -509,11 +497,11 @@ static int bq20z75_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
 	case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
 	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
-		ret = bq20z75_get_property_index(client, psp);
+		ret = sbs_get_property_index(client, psp);
 		if (ret < 0)
 			break;
 
-		ret = bq20z75_get_battery_property(client, ret, psp, val);
+		ret = sbs_get_battery_property(client, ret, psp, val);
 		break;
 
 	default:
@@ -522,25 +510,25 @@ static int bq20z75_get_property(struct power_supply *psy,
 		return -EINVAL;
 	}
 
-	if (!bq20z75_device->enable_detection)
+	if (!chip->enable_detection)
 		goto done;
 
-	if (!bq20z75_device->gpio_detect &&
-		bq20z75_device->is_present != (ret >= 0)) {
-		bq20z75_device->is_present = (ret >= 0);
-		power_supply_changed(&bq20z75_device->power_supply);
+	if (!chip->gpio_detect &&
+		chip->is_present != (ret >= 0)) {
+		chip->is_present = (ret >= 0);
+		power_supply_changed(&chip->power_supply);
 	}
 
 done:
 	if (!ret) {
 		/* Convert units to match requirements for power supply class */
-		bq20z75_unit_adjustment(client, psp, val);
+		sbs_unit_adjustment(client, psp, val);
 	}
 
 	dev_dbg(&client->dev,
 		"%s: property = %d, value = %x\n", __func__, psp, val->intval);
 
-	if (ret && bq20z75_device->is_present)
+	if (ret && chip->is_present)
 		return ret;
 
 	/* battery not present, so return NODATA for properties */
@@ -550,7 +538,7 @@ done:
 	return 0;
 }
 
-static irqreturn_t bq20z75_irq(int irq, void *devid)
+static irqreturn_t sbs_irq(int irq, void *devid)
 {
 	struct power_supply *battery = devid;
 
@@ -559,36 +547,35 @@ static irqreturn_t bq20z75_irq(int irq, void *devid)
 	return IRQ_HANDLED;
 }
 
-static void bq20z75_external_power_changed(struct power_supply *psy)
+static void sbs_external_power_changed(struct power_supply *psy)
 {
-	struct bq20z75_info *bq20z75_device;
+	struct sbs_info *chip;
 
-	bq20z75_device = container_of(psy, struct bq20z75_info, power_supply);
+	chip = container_of(psy, struct sbs_info, power_supply);
 
-	if (bq20z75_device->ignore_changes > 0) {
-		bq20z75_device->ignore_changes--;
+	if (chip->ignore_changes > 0) {
+		chip->ignore_changes--;
 		return;
 	}
 
 	/* cancel outstanding work */
-	cancel_delayed_work_sync(&bq20z75_device->work);
+	cancel_delayed_work_sync(&chip->work);
 
-	schedule_delayed_work(&bq20z75_device->work, HZ);
-	bq20z75_device->poll_time = bq20z75_device->pdata->poll_retry_count;
+	schedule_delayed_work(&chip->work, HZ);
+	chip->poll_time = chip->pdata->poll_retry_count;
 }
 
-static void bq20z75_delayed_work(struct work_struct *work)
+static void sbs_delayed_work(struct work_struct *work)
 {
-	struct bq20z75_info *bq20z75_device;
+	struct sbs_info *chip;
 	s32 ret;
 
-	bq20z75_device = container_of(work, struct bq20z75_info, work.work);
+	chip = container_of(work, struct sbs_info, work.work);
 
-	ret = bq20z75_read_word_data(bq20z75_device->client,
-				     bq20z75_data[REG_STATUS].addr);
+	ret = sbs_read_word_data(chip->client, sbs_data[REG_STATUS].addr);
 	/* if the read failed, give up on this work */
 	if (ret < 0) {
-		bq20z75_device->poll_time = 0;
+		chip->poll_time = 0;
 		return;
 	}
 
@@ -601,62 +588,145 @@ static void bq20z75_delayed_work(struct work_struct *work)
 	else
 		ret = POWER_SUPPLY_STATUS_CHARGING;
 
-	if (bq20z75_device->last_state != ret) {
-		bq20z75_device->poll_time = 0;
-		power_supply_changed(&bq20z75_device->power_supply);
+	if (chip->last_state != ret) {
+		chip->poll_time = 0;
+		power_supply_changed(&chip->power_supply);
 		return;
 	}
-	if (bq20z75_device->poll_time > 0) {
-		schedule_delayed_work(&bq20z75_device->work, HZ);
-		bq20z75_device->poll_time--;
+	if (chip->poll_time > 0) {
+		schedule_delayed_work(&chip->work, HZ);
+		chip->poll_time--;
 		return;
 	}
 }
 
-static int __devinit bq20z75_probe(struct i2c_client *client,
+#if defined(CONFIG_OF)
+
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+
+static const struct of_device_id sbs_dt_ids[] = {
+	{ .compatible = "sbs,sbs-battery" },
+	{ .compatible = "ti,bq20z75" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sbs_dt_ids);
+
+static struct sbs_platform_data *sbs_of_populate_pdata(
+		struct i2c_client *client)
+{
+	struct device_node *of_node = client->dev.of_node;
+	struct sbs_platform_data *pdata = client->dev.platform_data;
+	enum of_gpio_flags gpio_flags;
+	int rc;
+	u32 prop;
+
+	/* verify this driver matches this device */
+	if (!of_node)
+		return NULL;
+
+	/* if platform data is set, honor it */
+	if (pdata)
+		return pdata;
+
+	/* first make sure at least one property is set, otherwise
+	 * it won't change behavior from running without pdata.
+	 */
+	if (!of_get_property(of_node, "sbs,i2c-retry-count", NULL) &&
+		!of_get_property(of_node, "sbs,poll-retry-count", NULL) &&
+		!of_get_property(of_node, "sbs,battery-detect-gpios", NULL))
+		goto of_out;
+
+	pdata = devm_kzalloc(&client->dev, sizeof(struct sbs_platform_data),
+				GFP_KERNEL);
+	if (!pdata)
+		goto of_out;
+
+	rc = of_property_read_u32(of_node, "sbs,i2c-retry-count", &prop);
+	if (!rc)
+		pdata->i2c_retry_count = prop;
+
+	rc = of_property_read_u32(of_node, "sbs,poll-retry-count", &prop);
+	if (!rc)
+		pdata->poll_retry_count = prop;
+
+	if (!of_get_property(of_node, "sbs,battery-detect-gpios", NULL)) {
+		pdata->battery_detect = -1;
+		goto of_out;
+	}
+
+	pdata->battery_detect = of_get_named_gpio_flags(of_node,
+			"sbs,battery-detect-gpios", 0, &gpio_flags);
+
+	if (gpio_flags & OF_GPIO_ACTIVE_LOW)
+		pdata->battery_detect_present = 0;
+	else
+		pdata->battery_detect_present = 1;
+
+of_out:
+	return pdata;
+}
+#else
+#define sbs_dt_ids NULL
+static struct sbs_platform_data *sbs_of_populate_pdata(
+	struct i2c_client *client)
+{
+	return client->dev.platform_data;
+}
+#endif
+
+static int __devinit sbs_probe(struct i2c_client *client,
 	const struct i2c_device_id *id)
 {
-	struct bq20z75_info *bq20z75_device;
-	struct bq20z75_platform_data *pdata = client->dev.platform_data;
+	struct sbs_info *chip;
+	struct sbs_platform_data *pdata = client->dev.platform_data;
 	int rc;
 	int irq;
+	char *name;
 
-	bq20z75_device = kzalloc(sizeof(struct bq20z75_info), GFP_KERNEL);
-	if (!bq20z75_device)
+	name = kasprintf(GFP_KERNEL, "sbs-%s", dev_name(&client->dev));
+	if (!name) {
+		dev_err(&client->dev, "Failed to allocate device name\n");
 		return -ENOMEM;
+	}
+
+	chip = kzalloc(sizeof(struct sbs_info), GFP_KERNEL);
+	if (!chip) {
+		rc = -ENOMEM;
+		goto exit_free_name;
+	}
 
-	bq20z75_device->client = client;
-	bq20z75_device->enable_detection = false;
-	bq20z75_device->gpio_detect = false;
-	bq20z75_device->power_supply.name = "battery";
-	bq20z75_device->power_supply.type = POWER_SUPPLY_TYPE_BATTERY;
-	bq20z75_device->power_supply.properties = bq20z75_properties;
-	bq20z75_device->power_supply.num_properties =
-		ARRAY_SIZE(bq20z75_properties);
-	bq20z75_device->power_supply.get_property = bq20z75_get_property;
+	chip->client = client;
+	chip->enable_detection = false;
+	chip->gpio_detect = false;
+	chip->power_supply.name = name;
+	chip->power_supply.type = POWER_SUPPLY_TYPE_BATTERY;
+	chip->power_supply.properties = sbs_properties;
+	chip->power_supply.num_properties = ARRAY_SIZE(sbs_properties);
+	chip->power_supply.get_property = sbs_get_property;
 	/* ignore first notification of external change, it is generated
 	 * from the power_supply_register call back
 	 */
-	bq20z75_device->ignore_changes = 1;
-	bq20z75_device->last_state = POWER_SUPPLY_STATUS_UNKNOWN;
-	bq20z75_device->power_supply.external_power_changed =
-		bq20z75_external_power_changed;
+	chip->ignore_changes = 1;
+	chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN;
+	chip->power_supply.external_power_changed = sbs_external_power_changed;
+
+	pdata = sbs_of_populate_pdata(client);
 
 	if (pdata) {
-		bq20z75_device->gpio_detect =
-			gpio_is_valid(pdata->battery_detect);
-		bq20z75_device->pdata = pdata;
+		chip->gpio_detect = gpio_is_valid(pdata->battery_detect);
+		chip->pdata = pdata;
 	}
 
-	i2c_set_clientdata(client, bq20z75_device);
+	i2c_set_clientdata(client, chip);
 
-	if (!bq20z75_device->gpio_detect)
+	if (!chip->gpio_detect)
 		goto skip_gpio;
 
 	rc = gpio_request(pdata->battery_detect, dev_name(&client->dev));
 	if (rc) {
 		dev_warn(&client->dev, "Failed to request gpio: %d\n", rc);
-		bq20z75_device->gpio_detect = false;
+		chip->gpio_detect = false;
 		goto skip_gpio;
 	}
 
@@ -664,7 +734,7 @@ static int __devinit bq20z75_probe(struct i2c_client *client,
 	if (rc) {
 		dev_warn(&client->dev, "Failed to get gpio as input: %d\n", rc);
 		gpio_free(pdata->battery_detect);
-		bq20z75_device->gpio_detect = false;
+		chip->gpio_detect = false;
 		goto skip_gpio;
 	}
 
@@ -672,25 +742,25 @@ static int __devinit bq20z75_probe(struct i2c_client *client,
 	if (irq <= 0) {
 		dev_warn(&client->dev, "Failed to get gpio as irq: %d\n", irq);
 		gpio_free(pdata->battery_detect);
-		bq20z75_device->gpio_detect = false;
+		chip->gpio_detect = false;
 		goto skip_gpio;
 	}
 
-	rc = request_irq(irq, bq20z75_irq,
+	rc = request_irq(irq, sbs_irq,
 		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-		dev_name(&client->dev), &bq20z75_device->power_supply);
+		dev_name(&client->dev), &chip->power_supply);
 	if (rc) {
 		dev_warn(&client->dev, "Failed to request irq: %d\n", rc);
 		gpio_free(pdata->battery_detect);
-		bq20z75_device->gpio_detect = false;
+		chip->gpio_detect = false;
 		goto skip_gpio;
 	}
 
-	bq20z75_device->irq = irq;
+	chip->irq = irq;
 
 skip_gpio:
 
-	rc = power_supply_register(&client->dev, &bq20z75_device->power_supply);
+	rc = power_supply_register(&client->dev, &chip->power_supply);
 	if (rc) {
 		dev_err(&client->dev,
 			"%s: Failed to register power supply\n", __func__);
@@ -700,95 +770,100 @@ skip_gpio:
 	dev_info(&client->dev,
 		"%s: battery gas gauge device registered\n", client->name);
 
-	INIT_DELAYED_WORK(&bq20z75_device->work, bq20z75_delayed_work);
+	INIT_DELAYED_WORK(&chip->work, sbs_delayed_work);
 
-	bq20z75_device->enable_detection = true;
+	chip->enable_detection = true;
 
 	return 0;
 
 exit_psupply:
-	if (bq20z75_device->irq)
-		free_irq(bq20z75_device->irq, &bq20z75_device->power_supply);
-	if (bq20z75_device->gpio_detect)
+	if (chip->irq)
+		free_irq(chip->irq, &chip->power_supply);
+	if (chip->gpio_detect)
 		gpio_free(pdata->battery_detect);
 
-	kfree(bq20z75_device);
+	kfree(chip);
+
+exit_free_name:
+	kfree(name);
 
 	return rc;
 }
 
-static int __devexit bq20z75_remove(struct i2c_client *client)
+static int __devexit sbs_remove(struct i2c_client *client)
 {
-	struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
+	struct sbs_info *chip = i2c_get_clientdata(client);
 
-	if (bq20z75_device->irq)
-		free_irq(bq20z75_device->irq, &bq20z75_device->power_supply);
-	if (bq20z75_device->gpio_detect)
-		gpio_free(bq20z75_device->pdata->battery_detect);
+	if (chip->irq)
+		free_irq(chip->irq, &chip->power_supply);
+	if (chip->gpio_detect)
+		gpio_free(chip->pdata->battery_detect);
 
-	power_supply_unregister(&bq20z75_device->power_supply);
+	power_supply_unregister(&chip->power_supply);
 
-	cancel_delayed_work_sync(&bq20z75_device->work);
+	cancel_delayed_work_sync(&chip->work);
 
-	kfree(bq20z75_device);
-	bq20z75_device = NULL;
+	kfree(chip->power_supply.name);
+	kfree(chip);
+	chip = NULL;
 
 	return 0;
 }
 
 #if defined CONFIG_PM
-static int bq20z75_suspend(struct i2c_client *client,
+static int sbs_suspend(struct i2c_client *client,
 	pm_message_t state)
 {
-	struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
+	struct sbs_info *chip = i2c_get_clientdata(client);
 	s32 ret;
 
-	if (bq20z75_device->poll_time > 0)
-		cancel_delayed_work_sync(&bq20z75_device->work);
+	if (chip->poll_time > 0)
+		cancel_delayed_work_sync(&chip->work);
 
 	/* write to manufacturer access with sleep command */
-	ret = bq20z75_write_word_data(client,
-		bq20z75_data[REG_MANUFACTURER_DATA].addr,
+	ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr,
 		MANUFACTURER_ACCESS_SLEEP);
-	if (bq20z75_device->is_present && ret < 0)
+	if (chip->is_present && ret < 0)
 		return ret;
 
 	return 0;
 }
 #else
-#define bq20z75_suspend		NULL
+#define sbs_suspend		NULL
 #endif
-/* any smbus transaction will wake up bq20z75 */
-#define bq20z75_resume		NULL
+/* any smbus transaction will wake up sbs */
+#define sbs_resume		NULL
 
-static const struct i2c_device_id bq20z75_id[] = {
+static const struct i2c_device_id sbs_id[] = {
 	{ "bq20z75", 0 },
+	{ "sbs-battery", 1 },
 	{}
 };
-MODULE_DEVICE_TABLE(i2c, bq20z75_id);
-
-static struct i2c_driver bq20z75_battery_driver = {
-	.probe		= bq20z75_probe,
-	.remove		= __devexit_p(bq20z75_remove),
-	.suspend	= bq20z75_suspend,
-	.resume		= bq20z75_resume,
-	.id_table	= bq20z75_id,
+MODULE_DEVICE_TABLE(i2c, sbs_id);
+
+static struct i2c_driver sbs_battery_driver = {
+	.probe		= sbs_probe,
+	.remove		= __devexit_p(sbs_remove),
+	.suspend	= sbs_suspend,
+	.resume		= sbs_resume,
+	.id_table	= sbs_id,
 	.driver = {
-		.name	= "bq20z75-battery",
+		.name	= "sbs-battery",
+		.of_match_table = sbs_dt_ids,
 	},
 };
 
-static int __init bq20z75_battery_init(void)
+static int __init sbs_battery_init(void)
 {
-	return i2c_add_driver(&bq20z75_battery_driver);
+	return i2c_add_driver(&sbs_battery_driver);
 }
-module_init(bq20z75_battery_init);
+module_init(sbs_battery_init);
 
-static void __exit bq20z75_battery_exit(void)
+static void __exit sbs_battery_exit(void)
 {
-	i2c_del_driver(&bq20z75_battery_driver);
+	i2c_del_driver(&sbs_battery_driver);
 }
-module_exit(bq20z75_battery_exit);
+module_exit(sbs_battery_exit);
 
-MODULE_DESCRIPTION("BQ20z75 battery monitor driver");
+MODULE_DESCRIPTION("SBS battery monitor driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/power/tosa_battery.c b/drivers/power/tosa_battery.c
index 53f0d35..28bbe7e 100644
--- a/drivers/power/tosa_battery.c
+++ b/drivers/power/tosa_battery.c
@@ -307,25 +307,20 @@ static struct tosa_bat tosa_bat_bu = {
 	.adc_temp_divider = -1,
 };
 
-static struct {
-	int gpio;
-	char *name;
-	bool output;
-	int value;
-} gpios[] = {
-	{ TOSA_GPIO_CHARGE_OFF,		"main charge off",	1, 1 },
-	{ TOSA_GPIO_CHARGE_OFF_JC,	"jacket charge off",	1, 1 },
-	{ TOSA_GPIO_BAT_SW_ON,		"battery switch",	1, 0 },
-	{ TOSA_GPIO_BAT0_V_ON,		"main battery",		1, 0 },
-	{ TOSA_GPIO_BAT1_V_ON,		"jacket battery",	1, 0 },
-	{ TOSA_GPIO_BAT1_TH_ON,		"main battery temp",	1, 0 },
-	{ TOSA_GPIO_BAT0_TH_ON,		"jacket battery temp",	1, 0 },
-	{ TOSA_GPIO_BU_CHRG_ON,		"backup battery",	1, 0 },
-	{ TOSA_GPIO_BAT0_CRG,		"main battery full",	0, 0 },
-	{ TOSA_GPIO_BAT1_CRG,		"jacket battery full",	0, 0 },
-	{ TOSA_GPIO_BAT0_LOW,		"main battery low",	0, 0 },
-	{ TOSA_GPIO_BAT1_LOW,		"jacket battery low",	0, 0 },
-	{ TOSA_GPIO_JACKET_DETECT,	"jacket detect",	0, 0 },
+static struct gpio tosa_bat_gpios[] = {
+	{ TOSA_GPIO_CHARGE_OFF,	   GPIOF_OUT_INIT_HIGH, "main charge off" },
+	{ TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" },
+	{ TOSA_GPIO_BAT_SW_ON,	   GPIOF_OUT_INIT_LOW,	"battery switch" },
+	{ TOSA_GPIO_BAT0_V_ON,	   GPIOF_OUT_INIT_LOW,	"main battery" },
+	{ TOSA_GPIO_BAT1_V_ON,	   GPIOF_OUT_INIT_LOW,	"jacket battery" },
+	{ TOSA_GPIO_BAT1_TH_ON,	   GPIOF_OUT_INIT_LOW,	"main battery temp" },
+	{ TOSA_GPIO_BAT0_TH_ON,	   GPIOF_OUT_INIT_LOW,	"jacket battery temp" },
+	{ TOSA_GPIO_BU_CHRG_ON,	   GPIOF_OUT_INIT_LOW,	"backup battery" },
+	{ TOSA_GPIO_BAT0_CRG,	   GPIOF_IN,		"main battery full" },
+	{ TOSA_GPIO_BAT1_CRG,	   GPIOF_IN,		"jacket battery full" },
+	{ TOSA_GPIO_BAT0_LOW,	   GPIOF_IN,		"main battery low" },
+	{ TOSA_GPIO_BAT1_LOW,	   GPIOF_IN,		"jacket battery low" },
+	{ TOSA_GPIO_JACKET_DETECT, GPIOF_IN,		"jacket detect" },
 };
 
 #ifdef CONFIG_PM
@@ -350,27 +345,13 @@ static int tosa_bat_resume(struct platform_device *dev)
 static int __devinit tosa_bat_probe(struct platform_device *dev)
 {
 	int ret;
-	int i;
 
 	if (!machine_is_tosa())
 		return -ENODEV;
 
-	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
-		ret = gpio_request(gpios[i].gpio, gpios[i].name);
-		if (ret) {
-			i--;
-			goto err_gpio;
-		}
-
-		if (gpios[i].output)
-			ret = gpio_direction_output(gpios[i].gpio,
-					gpios[i].value);
-		else
-			ret = gpio_direction_input(gpios[i].gpio);
-
-		if (ret)
-			goto err_gpio;
-	}
+	ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
+	if (ret)
+		return ret;
 
 	mutex_init(&tosa_bat_main.work_lock);
 	mutex_init(&tosa_bat_jacket.work_lock);
@@ -424,18 +405,12 @@ err_psy_reg_main:
 	/* see comment in tosa_bat_remove */
 	cancel_work_sync(&bat_work);
 
-	i--;
-err_gpio:
-	for (; i >= 0; i--)
-		gpio_free(gpios[i].gpio);
-
+	gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
 	return ret;
 }
 
 static int __devexit tosa_bat_remove(struct platform_device *dev)
 {
-	int i;
-
 	free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket);
 	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
 	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
@@ -450,10 +425,7 @@ static int __devexit tosa_bat_remove(struct platform_device *dev)
 	 * unregistered now.
 	 */
 	cancel_work_sync(&bat_work);
-
-	for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--)
-		gpio_free(gpios[i].gpio);
-
+	gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
 	return 0;
 }
 
@@ -466,18 +438,7 @@ static struct platform_driver tosa_bat_driver = {
 	.resume		= tosa_bat_resume,
 };
 
-static int __init tosa_bat_init(void)
-{
-	return platform_driver_register(&tosa_bat_driver);
-}
-
-static void __exit tosa_bat_exit(void)
-{
-	platform_driver_unregister(&tosa_bat_driver);
-}
-
-module_init(tosa_bat_init);
-module_exit(tosa_bat_exit);
+module_platform_driver(tosa_bat_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Dmitry Baryshkov");
diff --git a/drivers/power/wm831x_backup.c b/drivers/power/wm831x_backup.c
index e648cbe..6243e69 100644
--- a/drivers/power/wm831x_backup.c
+++ b/drivers/power/wm831x_backup.c
@@ -226,17 +226,7 @@ static struct platform_driver wm831x_backup_driver = {
 	},
 };
 
-static int __init wm831x_backup_init(void)
-{
-	return platform_driver_register(&wm831x_backup_driver);
-}
-module_init(wm831x_backup_init);
-
-static void __exit wm831x_backup_exit(void)
-{
-	platform_driver_unregister(&wm831x_backup_driver);
-}
-module_exit(wm831x_backup_exit);
+module_platform_driver(wm831x_backup_driver);
 
 MODULE_DESCRIPTION("Backup battery charger driver for WM831x PMICs");
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
diff --git a/drivers/power/wm831x_power.c b/drivers/power/wm831x_power.c
index 6cc2ca6..987332b 100644
--- a/drivers/power/wm831x_power.c
+++ b/drivers/power/wm831x_power.c
@@ -27,6 +27,7 @@ struct wm831x_power {
 	char wall_name[20];
 	char usb_name[20];
 	char battery_name[20];
+	bool have_battery;
 };
 
 static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
@@ -449,7 +450,8 @@ static irqreturn_t wm831x_bat_irq(int irq, void *data)
 
 	/* The battery charger is autonomous so we don't need to do
 	 * anything except kick user space */
-	power_supply_changed(&wm831x_power->battery);
+	if (wm831x_power->have_battery)
+		power_supply_changed(&wm831x_power->battery);
 
 	return IRQ_HANDLED;
 }
@@ -479,7 +481,8 @@ static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
 	dev_dbg(wm831x->dev, "Power source changed\n");
 
 	/* Just notify for everything - little harm in overnotifying. */
-	power_supply_changed(&wm831x_power->battery);
+	if (wm831x_power->have_battery)
+		power_supply_changed(&wm831x_power->battery);
 	power_supply_changed(&wm831x_power->usb);
 	power_supply_changed(&wm831x_power->wall);
 
@@ -537,15 +540,6 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_kmalloc;
 
-	battery->name = power->battery_name;
-	battery->properties = wm831x_bat_props;
-	battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
-	battery->get_property = wm831x_bat_get_prop;
-	battery->use_for_apm = 1;
-	ret = power_supply_register(&pdev->dev, battery);
-	if (ret)
-		goto err_wall;
-
 	usb->name = power->usb_name,
 	usb->type = POWER_SUPPLY_TYPE_USB;
 	usb->properties = wm831x_usb_props;
@@ -553,7 +547,23 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
 	usb->get_property = wm831x_usb_get_prop;
 	ret = power_supply_register(&pdev->dev, usb);
 	if (ret)
-		goto err_battery;
+		goto err_wall;
+
+	ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
+	if (ret < 0)
+		goto err_wall;
+	power->have_battery = ret & WM831X_CHG_ENA;
+
+	if (power->have_battery) {
+		    battery->name = power->battery_name;
+		    battery->properties = wm831x_bat_props;
+		    battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
+		    battery->get_property = wm831x_bat_get_prop;
+		    battery->use_for_apm = 1;
+		    ret = power_supply_register(&pdev->dev, battery);
+		    if (ret)
+			    goto err_usb;
+	}
 
 	irq = platform_get_irq_byname(pdev, "SYSLO");
 	ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
@@ -562,7 +572,7 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
 			irq, ret);
-		goto err_usb;
+		goto err_battery;
 	}
 
 	irq = platform_get_irq_byname(pdev, "PWR SRC");
@@ -601,10 +611,11 @@ err_bat_irq:
 err_syslo:
 	irq = platform_get_irq_byname(pdev, "SYSLO");
 	free_irq(irq, power);
+err_battery:
+	if (power->have_battery)
+		power_supply_unregister(battery);
 err_usb:
 	power_supply_unregister(usb);
-err_battery:
-	power_supply_unregister(battery);
 err_wall:
 	power_supply_unregister(wall);
 err_kmalloc:
@@ -628,7 +639,8 @@ static __devexit int wm831x_power_remove(struct platform_device *pdev)
 	irq = platform_get_irq_byname(pdev, "SYSLO");
 	free_irq(irq, wm831x_power);
 
-	power_supply_unregister(&wm831x_power->battery);
+	if (wm831x_power->have_battery)
+		power_supply_unregister(&wm831x_power->battery);
 	power_supply_unregister(&wm831x_power->wall);
 	power_supply_unregister(&wm831x_power->usb);
 	kfree(wm831x_power);
@@ -643,17 +655,7 @@ static struct platform_driver wm831x_power_driver = {
 	},
 };
 
-static int __init wm831x_power_init(void)
-{
-	return platform_driver_register(&wm831x_power_driver);
-}
-module_init(wm831x_power_init);
-
-static void __exit wm831x_power_exit(void)
-{
-	platform_driver_unregister(&wm831x_power_driver);
-}
-module_exit(wm831x_power_exit);
+module_platform_driver(wm831x_power_driver);
 
 MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
diff --git a/drivers/power/wm8350_power.c b/drivers/power/wm8350_power.c
index 0693902..fae04d3 100644
--- a/drivers/power/wm8350_power.c
+++ b/drivers/power/wm8350_power.c
@@ -522,17 +522,7 @@ static struct platform_driver wm8350_power_driver = {
 	},
 };
 
-static int __init wm8350_power_init(void)
-{
-	return platform_driver_register(&wm8350_power_driver);
-}
-module_init(wm8350_power_init);
-
-static void __exit wm8350_power_exit(void)
-{
-	platform_driver_unregister(&wm8350_power_driver);
-}
-module_exit(wm8350_power_exit);
+module_platform_driver(wm8350_power_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Power supply driver for WM8350");
diff --git a/drivers/power/wm97xx_battery.c b/drivers/power/wm97xx_battery.c
index 156559e..d2d4c08 100644
--- a/drivers/power/wm97xx_battery.c
+++ b/drivers/power/wm97xx_battery.c
@@ -25,9 +25,8 @@
 #include <linux/irq.h>
 #include <linux/slab.h>
 
-static DEFINE_MUTEX(bat_lock);
 static struct work_struct bat_work;
-static struct mutex work_lock;
+static DEFINE_MUTEX(work_lock);
 static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
 static enum power_supply_property *prop;
 
@@ -181,8 +180,6 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
 	if (dev->id != -1)
 		return -EINVAL;
 
-	mutex_init(&work_lock);
-
 	if (!pdata) {
 		dev_err(&dev->dev, "No platform_data supplied\n");
 		return -EINVAL;
@@ -196,7 +193,7 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
 		if (ret)
 			goto err2;
 		ret = request_irq(gpio_to_irq(pdata->charge_gpio),
-				wm97xx_chrg_irq, IRQF_DISABLED,
+				wm97xx_chrg_irq, 0,
 				"AC Detect", dev);
 		if (ret)
 			goto err2;
@@ -291,18 +288,7 @@ static struct platform_driver wm97xx_bat_driver = {
 	.remove		= __devexit_p(wm97xx_bat_remove),
 };
 
-static int __init wm97xx_bat_init(void)
-{
-	return platform_driver_register(&wm97xx_bat_driver);
-}
-
-static void __exit wm97xx_bat_exit(void)
-{
-	platform_driver_unregister(&wm97xx_bat_driver);
-}
-
-module_init(wm97xx_bat_init);
-module_exit(wm97xx_bat_exit);
+module_platform_driver(wm97xx_bat_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
diff --git a/drivers/power/z2_battery.c b/drivers/power/z2_battery.c
index d119c38..636ebb2 100644
--- a/drivers/power/z2_battery.c
+++ b/drivers/power/z2_battery.c
@@ -218,7 +218,7 @@ static int __devinit z2_batt_probe(struct i2c_client *client,
 		irq_set_irq_type(gpio_to_irq(info->charge_gpio),
 				 IRQ_TYPE_EDGE_BOTH);
 		ret = request_irq(gpio_to_irq(info->charge_gpio),
-				z2_charge_switch_irq, IRQF_DISABLED,
+				z2_charge_switch_irq, 0,
 				"AC Detect", charger);
 		if (ret)
 			goto err3;
@@ -313,7 +313,7 @@ static struct i2c_driver z2_batt_driver = {
 		.pm	= Z2_BATTERY_PM_OPS
 	},
 	.probe		= z2_batt_probe,
-	.remove		= z2_batt_remove,
+	.remove		= __devexit_p(z2_batt_remove),
 	.id_table	= z2_batt_id,
 };