Merge tag 'for-v3.10' of git://git.infradead.org/battery-2.6

Pull battery updates from Anton Vorontsov:
 "Highlights:

   - OpenFirmware/DeviceTree support for the Power Supply core: the core
     now automatically populates supplied_from hierarchy from the device
     tree.  With these patches chargers and batteries can now lookup
     each other without the board files support shim.  Rhyland Klein at
     NVIDIA did the work

   - New ST-Ericsson ABX500 hwmon driver.  The driver is heavily using
     the AB85xx core and depends on some recent changes to it, so that
     is why the driver comes through the battery tree.  It has an
     appropriate ack from the hwmon maintainer (i.e.  Guenter Roeck).
     Martin Persson at ST-Ericsson and Hongbo Zhang at Linaro authored
     the driver

   - Final bits to sync AB85xx ST-Ericsson changes into mainline.  The
     changes touch mfd parts, but these were acked by the appropriate
     MFD maintainer (ie Samuel Ortiz).  Lee Jones at Linaro did most of
     the work and lead the submission process.

  Minor changes, but still worth mentioning:

   - Battery temperature reporting fix for Nokia N900 phones
   - Versatile Express poweroff driver moved into drivers/power/reset/
   - Tree-wide: use devm_kzalloc() where appropriate
   - Tree-wide: dev_pm_ops cleanups/fixes"

* tag 'for-v3.10' of git://git.infradead.org/battery-2.6: (112 commits)
  pm2301-charger: Fix suspend/resume
  charger-manager: Use kmemdup instead of kzalloc + memcpy
  power_supply: Populate supplied_from hierarchy from the device tree
  power_supply: Add core support for supplied_from
  power_supply: Define Binding for power-supplies
  rx51_battery: Fix reporting temperature
  hwmon: Add ST-Ericsson ABX500 hwmon driver
  ab8500_bmdata: Export abx500_res_to_temp tables for hwmon
  ab8500_{bmdata,fg}: Add const attributes to some data arrays
  ab8500_bmdata: Eliminate CamelCase warning of some variables
  ab8500_btemp: Make ab8500_btemp_get* interfaces public
  goldfish_battery: Use resource_size()
  lp8788-charger: Use PAGE_SIZE for the sysfs read operation
  max8925_power: Use devm_kzalloc()
  da9030_battery: Use devm_kzalloc()
  da9052-battery: Use devm_kzalloc()
  ds2760_battery: Use devm_kzalloc()
  ds2780_battery: Use devm_kzalloc()
  gpio-charger: Use devm_kzalloc()
  isp1704_charger: Use devm_kzalloc()
  ...

37 files changed, 2521 insertions, 659 deletions

diff --git a/drivers/power/88pm860x_charger.c b/drivers/power/88pm860x_charger.c
index 4b37a5af8de..36fb4b5a4b0 100644
--- a/drivers/power/88pm860x_charger.c
+++ b/drivers/power/88pm860x_charger.c
@@ -714,7 +714,6 @@ out_irq:
 	while (--i >= 0)
 		free_irq(info->irq[i], info);
 out:
-	kfree(info);
 	return ret;
 }
 
@@ -728,7 +727,6 @@ static int pm860x_charger_remove(struct platform_device *pdev)
 	free_irq(info->irq[0], info);
 	for (i = 0; i < info->irq_nums; i++)
 		free_irq(info->irq[i], info);
-	kfree(info);
 	return 0;
 }
 
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index ffe02fb7cbc..0d0b5d7d19d 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -340,6 +340,13 @@ config CHARGER_SMB347
 	  Say Y to include support for Summit Microelectronics SMB347
 	  Battery Charger.
 
+config CHARGER_TPS65090
+	tristate "TPS65090 battery charger driver"
+	depends on MFD_TPS65090
+	help
+	 Say Y here to enable support for battery charging with TPS65090
+	 PMIC chips.
+
 config AB8500_BM
 	bool "AB8500 Battery Management Driver"
 	depends on AB8500_CORE && AB8500_GPADC
@@ -353,13 +360,6 @@ config BATTERY_GOLDFISH
 	  Say Y to enable support for the battery and AC power in the
 	  Goldfish emulator.
 
-config CHARGER_PM2301
-	bool "PM2301 Battery Charger Driver"
-	depends on AB8500_BM
-	help
-	  Say Y to include support for PM2301 charger driver.
-	  Depends on AB8500 battery management core.
-
 source "drivers/power/reset/Kconfig"
 
 endif # POWER_SUPPLY
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 3f66436af45..653bf6ceff3 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -39,7 +39,7 @@ obj-$(CONFIG_CHARGER_PCF50633)	+= pcf50633-charger.o
 obj-$(CONFIG_BATTERY_JZ4740)	+= jz4740-battery.o
 obj-$(CONFIG_BATTERY_INTEL_MID)	+= intel_mid_battery.o
 obj-$(CONFIG_BATTERY_RX51)	+= rx51_battery.o
-obj-$(CONFIG_AB8500_BM)		+= ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o abx500_chargalg.o
+obj-$(CONFIG_AB8500_BM)		+= ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o abx500_chargalg.o pm2301_charger.o
 obj-$(CONFIG_CHARGER_ISP1704)	+= isp1704_charger.o
 obj-$(CONFIG_CHARGER_MAX8903)	+= max8903_charger.o
 obj-$(CONFIG_CHARGER_TWL4030)	+= twl4030_charger.o
@@ -47,10 +47,10 @@ obj-$(CONFIG_CHARGER_LP8727)	+= lp8727_charger.o
 obj-$(CONFIG_CHARGER_LP8788)	+= lp8788-charger.o
 obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o
 obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o
-obj-$(CONFIG_CHARGER_PM2301)	+= pm2301_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o
 obj-$(CONFIG_POWER_AVS)		+= avs/
 obj-$(CONFIG_CHARGER_SMB347)	+= smb347-charger.o
+obj-$(CONFIG_CHARGER_TPS65090)	+= tps65090-charger.o
 obj-$(CONFIG_POWER_RESET)	+= reset/
diff --git a/drivers/power/ab8500_bmdata.c b/drivers/power/ab8500_bmdata.c
index 7a96c0650fb..d2986453309 100644
--- a/drivers/power/ab8500_bmdata.c
+++ b/drivers/power/ab8500_bmdata.c
@@ -11,7 +11,7 @@
  * Note that the res_to_temp table must be strictly sorted by falling resistance
  * values to work.
  */
-static struct abx500_res_to_temp temp_tbl_A_thermistor[] = {
+const struct abx500_res_to_temp ab8500_temp_tbl_a_thermistor[] = {
 	{-5, 53407},
 	{ 0, 48594},
 	{ 5, 43804},
@@ -28,8 +28,12 @@ static struct abx500_res_to_temp temp_tbl_A_thermistor[] = {
 	{60, 13437},
 	{65, 12500},
 };
+EXPORT_SYMBOL(ab8500_temp_tbl_a_thermistor);
 
-static struct abx500_res_to_temp temp_tbl_B_thermistor[] = {
+const int ab8500_temp_tbl_a_size = ARRAY_SIZE(ab8500_temp_tbl_a_thermistor);
+EXPORT_SYMBOL(ab8500_temp_tbl_a_size);
+
+const struct abx500_res_to_temp ab8500_temp_tbl_b_thermistor[] = {
 	{-5, 200000},
 	{ 0, 159024},
 	{ 5, 151921},
@@ -46,8 +50,12 @@ static struct abx500_res_to_temp temp_tbl_B_thermistor[] = {
 	{60,  85461},
 	{65,  82869},
 };
+EXPORT_SYMBOL(ab8500_temp_tbl_b_thermistor);
+
+const int ab8500_temp_tbl_b_size = ARRAY_SIZE(ab8500_temp_tbl_b_thermistor);
+EXPORT_SYMBOL(ab8500_temp_tbl_b_size);
 
-static struct abx500_v_to_cap cap_tbl_A_thermistor[] = {
+static const struct abx500_v_to_cap cap_tbl_a_thermistor[] = {
 	{4171,	100},
 	{4114,	 95},
 	{4009,	 83},
@@ -70,7 +78,7 @@ static struct abx500_v_to_cap cap_tbl_A_thermistor[] = {
 	{3247,	  0},
 };
 
-static struct abx500_v_to_cap cap_tbl_B_thermistor[] = {
+static const struct abx500_v_to_cap cap_tbl_b_thermistor[] = {
 	{4161,	100},
 	{4124,	 98},
 	{4044,	 90},
@@ -93,7 +101,7 @@ static struct abx500_v_to_cap cap_tbl_B_thermistor[] = {
 	{3250,	  0},
 };
 
-static struct abx500_v_to_cap cap_tbl[] = {
+static const struct abx500_v_to_cap cap_tbl[] = {
 	{4186,	100},
 	{4163,	 99},
 	{4114,	 95},
@@ -124,7 +132,7 @@ static struct abx500_v_to_cap cap_tbl[] = {
  * Note that the res_to_temp table must be strictly sorted by falling
  * resistance values to work.
  */
-static struct abx500_res_to_temp temp_tbl[] = {
+static const struct abx500_res_to_temp temp_tbl[] = {
 	{-5, 214834},
 	{ 0, 162943},
 	{ 5, 124820},
@@ -146,7 +154,7 @@ static struct abx500_res_to_temp temp_tbl[] = {
  * Note that the batres_vs_temp table must be strictly sorted by falling
  * temperature values to work.
  */
-static struct batres_vs_temp temp_to_batres_tbl_thermistor[] = {
+static const struct batres_vs_temp temp_to_batres_tbl_thermistor[] = {
 	{ 40, 120},
 	{ 30, 135},
 	{ 20, 165},
@@ -160,7 +168,7 @@ static struct batres_vs_temp temp_to_batres_tbl_thermistor[] = {
  * Note that the batres_vs_temp table must be strictly sorted by falling
  * temperature values to work.
  */
-static struct batres_vs_temp temp_to_batres_tbl_ext_thermistor[] = {
+static const struct batres_vs_temp temp_to_batres_tbl_ext_thermistor[] = {
 	{ 60, 300},
 	{ 30, 300},
 	{ 20, 300},
@@ -171,7 +179,7 @@ static struct batres_vs_temp temp_to_batres_tbl_ext_thermistor[] = {
 };
 
 /* battery resistance table for LI ION 9100 battery */
-static struct batres_vs_temp temp_to_batres_tbl_9100[] = {
+static const struct batres_vs_temp temp_to_batres_tbl_9100[] = {
 	{ 60, 180},
 	{ 30, 180},
 	{ 20, 180},
@@ -230,10 +238,10 @@ static struct abx500_battery_type bat_type_thermistor[] = {
 		.maint_b_chg_timer_h = 200,
 		.low_high_cur_lvl = 300,
 		.low_high_vol_lvl = 4000,
-		.n_temp_tbl_elements = ARRAY_SIZE(temp_tbl_A_thermistor),
-		.r_to_t_tbl = temp_tbl_A_thermistor,
-		.n_v_cap_tbl_elements = ARRAY_SIZE(cap_tbl_A_thermistor),
-		.v_to_cap_tbl = cap_tbl_A_thermistor,
+		.n_temp_tbl_elements = ARRAY_SIZE(ab8500_temp_tbl_a_thermistor),
+		.r_to_t_tbl = ab8500_temp_tbl_a_thermistor,
+		.n_v_cap_tbl_elements = ARRAY_SIZE(cap_tbl_a_thermistor),
+		.v_to_cap_tbl = cap_tbl_a_thermistor,
 		.n_batres_tbl_elements = ARRAY_SIZE(temp_to_batres_tbl_thermistor),
 		.batres_tbl = temp_to_batres_tbl_thermistor,
 
@@ -258,10 +266,10 @@ static struct abx500_battery_type bat_type_thermistor[] = {
 		.maint_b_chg_timer_h = 200,
 		.low_high_cur_lvl = 300,
 		.low_high_vol_lvl = 4000,
-		.n_temp_tbl_elements = ARRAY_SIZE(temp_tbl_B_thermistor),
-		.r_to_t_tbl = temp_tbl_B_thermistor,
-		.n_v_cap_tbl_elements = ARRAY_SIZE(cap_tbl_B_thermistor),
-		.v_to_cap_tbl = cap_tbl_B_thermistor,
+		.n_temp_tbl_elements = ARRAY_SIZE(ab8500_temp_tbl_b_thermistor),
+		.r_to_t_tbl = ab8500_temp_tbl_b_thermistor,
+		.n_v_cap_tbl_elements = ARRAY_SIZE(cap_tbl_b_thermistor),
+		.v_to_cap_tbl = cap_tbl_b_thermistor,
 		.n_batres_tbl_elements = ARRAY_SIZE(temp_to_batres_tbl_thermistor),
 		.batres_tbl = temp_to_batres_tbl_thermistor,
 	},
@@ -407,15 +415,27 @@ static const struct abx500_fg_parameters fg = {
 	.battok_raising_th_sel1 = 2860,
 	.maint_thres = 95,
 	.user_cap_limit = 15,
+	.pcut_enable = 1,
+	.pcut_max_time = 127,
+	.pcut_flag_time = 112,
+	.pcut_max_restart = 15,
+	.pcut_debounce_time = 2,
 };
 
-static const struct abx500_maxim_parameters maxi_params = {
+static const struct abx500_maxim_parameters ab8500_maxi_params = {
 	.ena_maxi = true,
 	.chg_curr = 910,
 	.wait_cycles = 10,
 	.charger_curr_step = 100,
 };
 
+static const struct abx500_maxim_parameters abx540_maxi_params = {
+        .ena_maxi = true,
+        .chg_curr = 3000,
+        .wait_cycles = 10,
+        .charger_curr_step = 200,
+};
+
 static const struct abx500_bm_charger_parameters chg = {
 	.usb_volt_max		= 5500,
 	.usb_curr_max		= 1500,
@@ -423,6 +443,46 @@ static const struct abx500_bm_charger_parameters chg = {
 	.ac_curr_max		= 1500,
 };
 
+/*
+ * This array maps the raw hex value to charger output current used by the
+ * AB8500 values
+ */
+static int ab8500_charge_output_curr_map[] = {
+        100,    200,    300,    400,    500,    600,    700,    800,
+        900,    1000,   1100,   1200,   1300,   1400,   1500,   1500,
+};
+
+static int ab8540_charge_output_curr_map[] = {
+        0,      0,      0,      75,     100,    125,    150,    175,
+        200,    225,    250,    275,    300,    325,    350,    375,
+        400,    425,    450,    475,    500,    525,    550,    575,
+        600,    625,    650,    675,    700,    725,    750,    775,
+        800,    825,    850,    875,    900,    925,    950,    975,
+        1000,   1025,   1050,   1075,   1100,   1125,   1150,   1175,
+        1200,   1225,   1250,   1275,   1300,   1325,   1350,   1375,
+        1400,   1425,   1450,   1500,   1600,   1700,   1900,   2000,
+};
+
+/*
+ * This array maps the raw hex value to charger input current used by the
+ * AB8500 values
+ */
+static int ab8500_charge_input_curr_map[] = {
+        50,     98,     193,    290,    380,    450,    500,    600,
+        700,    800,    900,    1000,   1100,   1300,   1400,   1500,
+};
+
+static int ab8540_charge_input_curr_map[] = {
+        25,     50,     75,     100,    125,    150,    175,    200,
+        225,    250,    275,    300,    325,    350,    375,    400,
+        425,    450,    475,    500,    525,    550,    575,    600,
+        625,    650,    675,    700,    725,    750,    775,    800,
+        825,    850,    875,    900,    925,    950,    975,    1000,
+        1025,   1050,   1075,   1100,   1125,   1150,   1175,   1200,
+        1225,   1250,   1275,   1300,   1325,   1350,   1375,   1400,
+        1425,   1450,   1475,   1500,   1500,   1500,   1500,   1500,
+};
+
 struct abx500_bm_data ab8500_bm_data = {
 	.temp_under             = 3,
 	.temp_low               = 8,
@@ -442,22 +502,60 @@ struct abx500_bm_data ab8500_bm_data = {
 	.fg_res                 = 100,
 	.cap_levels             = &cap_levels,
 	.bat_type               = bat_type_thermistor,
-	.n_btypes               = 3,
+	.n_btypes               = ARRAY_SIZE(bat_type_thermistor),
 	.batt_id                = 0,
 	.interval_charging      = 5,
 	.interval_not_charging  = 120,
 	.temp_hysteresis        = 3,
 	.gnd_lift_resistance    = 34,
-	.maxi                   = &maxi_params,
+	.chg_output_curr        = ab8500_charge_output_curr_map,
+	.n_chg_out_curr         = ARRAY_SIZE(ab8500_charge_output_curr_map),
+	.maxi                   = &ab8500_maxi_params,
 	.chg_params             = &chg,
 	.fg_params              = &fg,
+        .chg_input_curr         = ab8500_charge_input_curr_map,
+        .n_chg_in_curr          = ARRAY_SIZE(ab8500_charge_input_curr_map),
+};
+
+struct abx500_bm_data ab8540_bm_data = {
+        .temp_under             = 3,
+        .temp_low               = 8,
+        .temp_high              = 43,
+        .temp_over              = 48,
+        .main_safety_tmr_h      = 4,
+        .temp_interval_chg      = 20,
+        .temp_interval_nochg    = 120,
+        .usb_safety_tmr_h       = 4,
+        .bkup_bat_v             = BUP_VCH_SEL_2P6V,
+        .bkup_bat_i             = BUP_ICH_SEL_150UA,
+        .no_maintenance         = false,
+        .capacity_scaling       = false,
+        .adc_therm              = ABx500_ADC_THERM_BATCTRL,
+        .chg_unknown_bat        = false,
+        .enable_overshoot       = false,
+        .fg_res                 = 100,
+        .cap_levels             = &cap_levels,
+        .bat_type               = bat_type_thermistor,
+        .n_btypes               = ARRAY_SIZE(bat_type_thermistor),
+        .batt_id                = 0,
+        .interval_charging      = 5,
+        .interval_not_charging  = 120,
+        .temp_hysteresis        = 3,
+        .gnd_lift_resistance    = 0,
+        .maxi                   = &abx540_maxi_params,
+        .chg_params             = &chg,
+        .fg_params              = &fg,
+        .chg_output_curr        = ab8540_charge_output_curr_map,
+        .n_chg_out_curr         = ARRAY_SIZE(ab8540_charge_output_curr_map),
+        .chg_input_curr         = ab8540_charge_input_curr_map,
+        .n_chg_in_curr          = ARRAY_SIZE(ab8540_charge_input_curr_map),
 };
 
 int ab8500_bm_of_probe(struct device *dev,
 		       struct device_node *np,
 		       struct abx500_bm_data *bm)
 {
-	struct batres_vs_temp *tmp_batres_tbl;
+	const struct batres_vs_temp *tmp_batres_tbl;
 	struct device_node *battery_node;
 	const char *btech;
 	int i;
diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c
index 07689064996..d412d34bf3d 100644
--- a/drivers/power/ab8500_btemp.c
+++ b/drivers/power/ab8500_btemp.c
@@ -42,6 +42,9 @@
 #define BTEMP_BATCTRL_CURR_SRC_16UA	16
 #define BTEMP_BATCTRL_CURR_SRC_18UA	18
 
+#define BTEMP_BATCTRL_CURR_SRC_60UA	60
+#define BTEMP_BATCTRL_CURR_SRC_120UA	120
+
 #define to_ab8500_btemp_device_info(x) container_of((x), \
 	struct ab8500_btemp, btemp_psy);
 
@@ -76,8 +79,8 @@ struct ab8500_btemp_ranges {
  * @dev:		Pointer to the structure device
  * @node:		List of AB8500 BTEMPs, hence prepared for reentrance
  * @curr_source:	What current source we use, in uA
- * @bat_temp:		Battery temperature in degree Celcius
- * @prev_bat_temp	Last dispatched battery temperature
+ * @bat_temp:		Dispatched battery temperature in degree Celcius
+ * @prev_bat_temp	Last measured battery temperature in degree Celcius
  * @parent:		Pointer to the struct ab8500
  * @gpadc:		Pointer to the struct gpadc
  * @fg:			Pointer to the struct fg
@@ -128,6 +131,7 @@ struct ab8500_btemp *ab8500_btemp_get(void)
 
 	return btemp;
 }
+EXPORT_SYMBOL(ab8500_btemp_get);
 
 /**
  * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance
@@ -155,7 +159,7 @@ static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di,
 	if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL) {
 		/*
 		 * If the battery has internal NTC, we use the current
-		 * source to calculate the resistance, 7uA or 20uA
+		 * source to calculate the resistance.
 		 */
 		rbs = (v_batctrl * 1000
 		       - di->bm->gnd_lift_resistance * inst_curr)
@@ -216,7 +220,12 @@ static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di,
 	/* Only do this for batteries with internal NTC */
 	if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && enable) {
 
-		if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
+		if (is_ab8540(di->parent)) {
+			if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_60UA)
+				curr = BAT_CTRL_60U_ENA;
+			else
+				curr = BAT_CTRL_120U_ENA;
+		} else if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
 			if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_16UA)
 				curr = BAT_CTRL_16U_ENA;
 			else
@@ -257,7 +266,14 @@ static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di,
 	} else if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && !enable) {
 		dev_dbg(di->dev, "Disable BATCTRL curr source\n");
 
-		if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
+		if (is_ab8540(di->parent)) {
+			/* Write 0 to the curr bits */
+			ret = abx500_mask_and_set_register_interruptible(
+				di->dev,
+				AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
+				BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA,
+				~(BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA));
+		} else if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
 			/* Write 0 to the curr bits */
 			ret = abx500_mask_and_set_register_interruptible(
 				di->dev,
@@ -314,7 +330,13 @@ static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di,
 	 * if we got an error above
 	 */
 disable_curr_source:
-	if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
+	if (is_ab8540(di->parent)) {
+		/* Write 0 to the curr bits */
+		ret = abx500_mask_and_set_register_interruptible(di->dev,
+			AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
+			BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA,
+			~(BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA));
+	} else if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
 		/* Write 0 to the curr bits */
 		ret = abx500_mask_and_set_register_interruptible(di->dev,
 			AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
@@ -541,7 +563,9 @@ static int ab8500_btemp_id(struct ab8500_btemp *di)
 {
 	int res;
 	u8 i;
-	if (is_ab9540(di->parent) || is_ab8505(di->parent))
+	if (is_ab8540(di->parent))
+		di->curr_source = BTEMP_BATCTRL_CURR_SRC_60UA;
+	else if (is_ab9540(di->parent) || is_ab8505(di->parent))
 		di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA;
 	else
 		di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA;
@@ -579,12 +603,17 @@ static int ab8500_btemp_id(struct ab8500_btemp *di)
 
 	/*
 	 * We only have to change current source if the
-	 * detected type is Type 1, else we use the 7uA source
+	 * detected type is Type 1.
 	 */
 	if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL &&
-			di->bm->batt_id == 1) {
-		if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
-			dev_dbg(di->dev, "Set BATCTRL current source to 16uA\n");
+	    di->bm->batt_id == 1) {
+		if (is_ab8540(di->parent)) {
+			dev_dbg(di->dev,
+				"Set BATCTRL current source to 60uA\n");
+			di->curr_source = BTEMP_BATCTRL_CURR_SRC_60UA;
+		} else if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
+			dev_dbg(di->dev,
+				"Set BATCTRL current source to 16uA\n");
 			di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA;
 		} else {
 			dev_dbg(di->dev, "Set BATCTRL current source to 20uA\n");
@@ -604,22 +633,37 @@ static int ab8500_btemp_id(struct ab8500_btemp *di)
 static void ab8500_btemp_periodic_work(struct work_struct *work)
 {
 	int interval;
+	int bat_temp;
 	struct ab8500_btemp *di = container_of(work,
 		struct ab8500_btemp, btemp_periodic_work.work);
 
 	if (!di->initialized) {
-		di->initialized = true;
 		/* Identify the battery */
 		if (ab8500_btemp_id(di) < 0)
 			dev_warn(di->dev, "failed to identify the battery\n");
 	}
 
-	di->bat_temp = ab8500_btemp_measure_temp(di);
-
-	if (di->bat_temp != di->prev_bat_temp) {
-		di->prev_bat_temp = di->bat_temp;
+	bat_temp = ab8500_btemp_measure_temp(di);
+	/*
+	 * Filter battery temperature.
+	 * Allow direct updates on temperature only if two samples result in
+	 * same temperature. Else only allow 1 degree change from previous
+	 * reported value in the direction of the new measurement.
+	 */
+	if ((bat_temp == di->prev_bat_temp) || !di->initialized) {
+		if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) {
+			di->initialized = true;
+			di->bat_temp = bat_temp;
+			power_supply_changed(&di->btemp_psy);
+		}
+	} else if (bat_temp < di->prev_bat_temp) {
+		di->bat_temp--;
+		power_supply_changed(&di->btemp_psy);
+	} else if (bat_temp > di->prev_bat_temp) {
+		di->bat_temp++;
 		power_supply_changed(&di->btemp_psy);
 	}
+	di->prev_bat_temp = bat_temp;
 
 	if (di->events.ac_conn || di->events.usb_conn)
 		interval = di->bm->temp_interval_chg;
@@ -772,7 +816,7 @@ static void ab8500_btemp_periodic(struct ab8500_btemp *di,
  *
  * Returns battery temperature
  */
-static int ab8500_btemp_get_temp(struct ab8500_btemp *di)
+int ab8500_btemp_get_temp(struct ab8500_btemp *di)
 {
 	int temp = 0;
 
@@ -808,6 +852,7 @@ static int ab8500_btemp_get_temp(struct ab8500_btemp *di)
 	}
 	return temp;
 }
+EXPORT_SYMBOL(ab8500_btemp_get_temp);
 
 /**
  * ab8500_btemp_get_batctrl_temp() - get the temperature
@@ -819,6 +864,7 @@ int ab8500_btemp_get_batctrl_temp(struct ab8500_btemp *btemp)
 {
 	return btemp->bat_temp * 1000;
 }
+EXPORT_SYMBOL(ab8500_btemp_get_batctrl_temp);
 
 /**
  * ab8500_btemp_get_property() - get the btemp properties
diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 24b30b7ea5c..a558318b169 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -15,6 +15,7 @@
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
+#include <linux/notifier.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
@@ -52,10 +53,15 @@
 #define VBUS_DET_DBNC100		0x02
 #define VBUS_DET_DBNC1			0x01
 #define OTP_ENABLE_WD			0x01
+#define DROP_COUNT_RESET		0x01
+#define USB_CH_DET			0x01
 
 #define MAIN_CH_INPUT_CURR_SHIFT	4
 #define VBUS_IN_CURR_LIM_SHIFT		4
+#define AB8540_VBUS_IN_CURR_LIM_SHIFT	2
 #define AUTO_VBUS_IN_CURR_LIM_SHIFT	4
+#define AB8540_AUTO_VBUS_IN_CURR_MASK	0x3F
+#define VBUS_IN_CURR_LIM_RETRY_SET_TIME	30 /* seconds */
 
 #define LED_INDICATOR_PWM_ENA		0x01
 #define LED_INDICATOR_PWM_DIS		0x00
@@ -77,7 +83,9 @@
 
 /* UsbLineStatus register bit masks */
 #define AB8500_USB_LINK_STATUS		0x78
+#define AB8505_USB_LINK_STATUS		0xF8
 #define AB8500_STD_HOST_SUSP		0x18
+#define USB_LINK_STATUS_SHIFT		3
 
 /* Watchdog timeout constant */
 #define WD_TIMER			0x30 /* 4min */
@@ -96,6 +104,10 @@
 #define AB8500_SW_CONTROL_FALLBACK	0x03
 /* Wait for enumeration before charing in us */
 #define WAIT_ACA_RID_ENUMERATION	(5 * 1000)
+/*External charger control*/
+#define AB8500_SYS_CHARGER_CONTROL_REG		0x52
+#define EXTERNAL_CHARGER_DISABLE_REG_VAL	0x03
+#define EXTERNAL_CHARGER_ENABLE_REG_VAL		0x07
 
 /* UsbLineStatus register - usb types */
 enum ab8500_charger_link_status {
@@ -196,10 +208,15 @@ struct ab8500_charger_usb_state {
 	spinlock_t usb_lock;
 };
 
+struct ab8500_charger_max_usb_in_curr {
+	int usb_type_max;
+	int set_max;
+	int calculated_max;
+};
+
 /**
  * struct ab8500_charger - ab8500 Charger device information
  * @dev:		Pointer to the structure device
- * @max_usb_in_curr:	Max USB charger input current
  * @vbus_detected:	VBUS detected
  * @vbus_detected_start:
  *			VBUS detected during startup
@@ -214,7 +231,6 @@ struct ab8500_charger_usb_state {
  * @autopower		Indicate if we should have automatic pwron after pwrloss
  * @autopower_cfg	platform specific power config support for "pwron after pwrloss"
  * @invalid_charger_detect_state State when forcing AB to use invalid charger
- * @is_usb_host:	Indicate if last detected USB type is host
  * @is_aca_rid:		Incicate if accessory is ACA type
  * @current_stepping_sessions:
  *			Counter for current stepping sessions
@@ -223,6 +239,7 @@ struct ab8500_charger_usb_state {
  * @bm:           	Platform specific battery management information
  * @flags:		Structure for information about events triggered
  * @usb_state:		Structure for usb stack information
+ * @max_usb_in_curr:	Max USB charger input current
  * @ac_chg:		AC charger power supply
  * @usb_chg:		USB charger power supply
  * @ac:			Structure that holds the AC charger properties
@@ -254,7 +271,6 @@ struct ab8500_charger_usb_state {
  */
 struct ab8500_charger {
 	struct device *dev;
-	int max_usb_in_curr;
 	bool vbus_detected;
 	bool vbus_detected_start;
 	bool ac_conn;
@@ -266,7 +282,6 @@ struct ab8500_charger {
 	bool autopower;
 	bool autopower_cfg;
 	int invalid_charger_detect_state;
-	bool is_usb_host;
 	int is_aca_rid;
 	atomic_t current_stepping_sessions;
 	struct ab8500 *parent;
@@ -274,6 +289,7 @@ struct ab8500_charger {
 	struct abx500_bm_data *bm;
 	struct ab8500_charger_event_flags flags;
 	struct ab8500_charger_usb_state usb_state;
+	struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
 	struct ux500_charger ac_chg;
 	struct ux500_charger usb_chg;
 	struct ab8500_charger_info ac;
@@ -415,13 +431,18 @@ static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
 	if (connected != di->usb.charger_connected) {
 		dev_dbg(di->dev, "USB connected:%i\n", connected);
 		di->usb.charger_connected = connected;
+
+		if (!connected)
+			di->flags.vbus_drop_end = false;
+
 		sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
 
 		if (connected) {
 			mutex_lock(&di->charger_attached_mutex);
 			mutex_unlock(&di->charger_attached_mutex);
 
-			queue_delayed_work(di->charger_wq,
+			if (is_ab8500(di->parent))
+				queue_delayed_work(di->charger_wq,
 					   &di->usb_charger_attached_work,
 					   HZ);
 		} else {
@@ -668,23 +689,19 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
 	case USB_STAT_STD_HOST_C_S:
 		dev_dbg(di->dev, "USB Type - Standard host is "
 			"detected through USB driver\n");
-		di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
-		di->is_usb_host = true;
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 		di->is_aca_rid = 0;