Merge drm-next into drm-intel-next-queued (this time for real)

To pull in the HDCP changes, especially wait_for changes to drm/i915
that Chris wants to build on top of.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

12 files changed, 377 insertions, 384 deletions

diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index 4ebbcce45c48..5a76c6d343de 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -3218,11 +3218,13 @@ static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
 	}
 
 	/* Enable backup battery charging */
-	abx500_mask_and_set_register_interruptible(di->dev,
+	ret = abx500_mask_and_set_register_interruptible(di->dev,
 		AB8500_RTC, AB8500_RTC_CTRL_REG,
 		RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(di->dev, "%s mask and set failed\n", __func__);
+		goto out;
+	}
 
 	if (is_ab8540(di->parent)) {
 		ret = abx500_mask_and_set_register_interruptible(di->dev,
diff --git a/drivers/power/supply/axp20x_ac_power.c b/drivers/power/supply/axp20x_ac_power.c
index 38f4e87cf24d..0771f951b11f 100644
--- a/drivers/power/supply/axp20x_ac_power.c
+++ b/drivers/power/supply/axp20x_ac_power.c
@@ -159,7 +159,7 @@ static int axp20x_ac_power_probe(struct platform_device *pdev)
 	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 	struct power_supply_config psy_cfg = {};
 	struct axp20x_ac_power *power;
-	struct axp_data *axp_data;
+	const struct axp_data *axp_data;
 	static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL",
 		NULL };
 	int i, irq, ret;
@@ -176,7 +176,7 @@ static int axp20x_ac_power_probe(struct platform_device *pdev)
 	if (!power)
 		return -ENOMEM;
 
-	axp_data = (struct axp_data *)of_device_get_match_data(&pdev->dev);
+	axp_data = of_device_get_match_data(&pdev->dev);
 
 	if (axp_data->acin_adc) {
 		power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
@@ -230,10 +230,10 @@ static int axp20x_ac_power_probe(struct platform_device *pdev)
 static const struct of_device_id axp20x_ac_power_match[] = {
 	{
 		.compatible = "x-powers,axp202-ac-power-supply",
-		.data = (void *)&axp20x_data,
+		.data = &axp20x_data,
 	}, {
 		.compatible = "x-powers,axp221-ac-power-supply",
-		.data = (void *)&axp22x_data,
+		.data = &axp22x_data,
 	}, { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
diff --git a/drivers/power/supply/axp288_charger.c b/drivers/power/supply/axp288_charger.c
index d51ebd1da65e..9bfbde15b07d 100644
--- a/drivers/power/supply/axp288_charger.c
+++ b/drivers/power/supply/axp288_charger.c
@@ -1,6 +1,7 @@
 /*
  * axp288_charger.c - X-power AXP288 PMIC Charger driver
  *
+ * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com>
  * Copyright (C) 2014 Intel Corporation
  * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
  *
@@ -98,28 +99,10 @@
 #define CV_4200MV			4200	/* 4200mV */
 #define CV_4350MV			4350	/* 4350mV */
 
-#define CC_200MA			200	/*  200mA */
-#define CC_600MA			600	/*  600mA */
-#define CC_800MA			800	/*  800mA */
-#define CC_1000MA			1000	/* 1000mA */
-#define CC_1600MA			1600	/* 1600mA */
-#define CC_2000MA			2000	/* 2000mA */
-
-#define ILIM_100MA			100	/* 100mA */
-#define ILIM_500MA			500	/* 500mA */
-#define ILIM_900MA			900	/* 900mA */
-#define ILIM_1500MA			1500	/* 1500mA */
-#define ILIM_2000MA			2000	/* 2000mA */
-#define ILIM_2500MA			2500	/* 2500mA */
-#define ILIM_3000MA			3000	/* 3000mA */
-
 #define AXP288_EXTCON_DEV_NAME		"axp288_extcon"
 #define USB_HOST_EXTCON_HID		"INT3496"
 #define USB_HOST_EXTCON_NAME		"INT3496:00"
 
-static const unsigned int cable_ids[] =
-	{ EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_CDP, EXTCON_CHG_USB_DCP };
-
 enum {
 	VBUS_OV_IRQ = 0,
 	CHARGE_DONE_IRQ,
@@ -139,7 +122,6 @@ struct axp288_chrg_info {
 	struct regmap_irq_chip_data *regmap_irqc;
 	int irq[CHRG_INTR_END];
 	struct power_supply *psy_usb;
-	struct mutex lock;
 
 	/* OTG/Host mode */
 	struct {
@@ -152,18 +134,14 @@ struct axp288_chrg_info {
 	/* SDP/CDP/DCP USB charging cable notifications */
 	struct {
 		struct extcon_dev *edev;
-		bool connected;
-		enum power_supply_type chg_type;
-		struct notifier_block nb[ARRAY_SIZE(cable_ids)];
+		struct notifier_block nb;
 		struct work_struct work;
 	} cable;
 
-	int inlmt;
 	int cc;
 	int cv;
 	int max_cc;
 	int max_cv;
-	int is_charger_enabled;
 };
 
 static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
@@ -220,51 +198,63 @@ static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
 	return ret;
 }
 
-static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
-					   int inlmt)
+static int axp288_charger_get_vbus_inlmt(struct axp288_chrg_info *info)
 {
-	int ret;
 	unsigned int val;
-	u8 reg_val;
+	int ret;
 
-	/* Read in limit register */
 	ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val);
 	if (ret < 0)
-		goto set_inlmt_fail;
-
-	if (inlmt <= ILIM_100MA) {
-		reg_val = CHRG_VBUS_ILIM_100MA;
-		inlmt = ILIM_100MA;
-	} else if (inlmt <= ILIM_500MA) {
-		reg_val = CHRG_VBUS_ILIM_500MA;
-		inlmt = ILIM_500MA;
-	} else if (inlmt <= ILIM_900MA) {
-		reg_val = CHRG_VBUS_ILIM_900MA;
-		inlmt = ILIM_900MA;
-	} else if (inlmt <= ILIM_1500MA) {
-		reg_val = CHRG_VBUS_ILIM_1500MA;
-		inlmt = ILIM_1500MA;
-	} else if (inlmt <= ILIM_2000MA) {
-		reg_val = CHRG_VBUS_ILIM_2000MA;
-		inlmt = ILIM_2000MA;
-	} else if (inlmt <= ILIM_2500MA) {
-		reg_val = CHRG_VBUS_ILIM_2500MA;
-		inlmt = ILIM_2500MA;
-	} else {
-		reg_val = CHRG_VBUS_ILIM_3000MA;
-		inlmt = ILIM_3000MA;
+		return ret;
+
+	val >>= CHRG_VBUS_ILIM_BIT_POS;
+	switch (val) {
+	case CHRG_VBUS_ILIM_100MA:
+		return 100000;
+	case CHRG_VBUS_ILIM_500MA:
+		return 500000;
+	case CHRG_VBUS_ILIM_900MA:
+		return 900000;
+	case CHRG_VBUS_ILIM_1500MA:
+		return 1500000;
+	case CHRG_VBUS_ILIM_2000MA:
+		return 2000000;
+	case CHRG_VBUS_ILIM_2500MA:
+		return 2500000;
+	case CHRG_VBUS_ILIM_3000MA:
+		return 3000000;
+	default:
+		dev_warn(&info->pdev->dev, "Unknown ilim reg val: %d\n", val);
+		return 0;
 	}
+}
 
-	reg_val = (val & ~CHRG_VBUS_ILIM_MASK)
-			| (reg_val << CHRG_VBUS_ILIM_BIT_POS);
-	ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val);
-	if (ret >= 0)
-		info->inlmt = inlmt;
+static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
+					   int inlmt)
+{
+	int ret;
+	u8 reg_val;
+
+	if (inlmt >= 3000000)
+		reg_val = CHRG_VBUS_ILIM_3000MA << CHRG_VBUS_ILIM_BIT_POS;
+	else if (inlmt >= 2500000)
+		reg_val = CHRG_VBUS_ILIM_2500MA << CHRG_VBUS_ILIM_BIT_POS;
+	else if (inlmt >= 2000000)
+		reg_val = CHRG_VBUS_ILIM_2000MA << CHRG_VBUS_ILIM_BIT_POS;
+	else if (inlmt >= 1500000)
+		reg_val = CHRG_VBUS_ILIM_1500MA << CHRG_VBUS_ILIM_BIT_POS;
+	else if (inlmt >= 900000)
+		reg_val = CHRG_VBUS_ILIM_900MA << CHRG_VBUS_ILIM_BIT_POS;
+	else if (inlmt >= 500000)
+		reg_val = CHRG_VBUS_ILIM_500MA << CHRG_VBUS_ILIM_BIT_POS;
 	else
-		dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
+		reg_val = CHRG_VBUS_ILIM_100MA << CHRG_VBUS_ILIM_BIT_POS;
 
+	ret = regmap_update_bits(info->regmap, AXP20X_CHRG_BAK_CTRL,
+				 CHRG_VBUS_ILIM_MASK, reg_val);
+	if (ret < 0)
+		dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
 
-set_inlmt_fail:
 	return ret;
 }
 
@@ -283,7 +273,6 @@ static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
 	if (ret < 0)
 		dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
 
-
 	return ret;
 }
 
@@ -292,9 +281,6 @@ static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
 {
 	int ret;
 
-	if ((int)enable == info->is_charger_enabled)
-		return 0;
-
 	if (enable)
 		ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
 				CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
@@ -303,8 +289,6 @@ static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
 				CHRG_CCCV_CHG_EN, 0);
 	if (ret < 0)
 		dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
-	else
-		info->is_charger_enabled = enable;
 
 	return ret;
 }
@@ -376,8 +360,6 @@ static int axp288_charger_usb_set_property(struct power_supply *psy,
 	int ret = 0;
 	int scaled_val;
 
-	mutex_lock(&info->lock);
-
 	switch (psp) {
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 		scaled_val = min(val->intval, info->max_cc);
@@ -393,11 +375,15 @@ static int axp288_charger_usb_set_property(struct power_supply *psy,
 		if (ret < 0)
 			dev_warn(&info->pdev->dev, "set charge voltage failed\n");
 		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = axp288_charger_set_vbus_inlmt(info, val->intval);
+		if (ret < 0)
+			dev_warn(&info->pdev->dev, "set input current limit failed\n");
+		break;
 	default:
 		ret = -EINVAL;
 	}
 
-	mutex_unlock(&info->lock);
 	return ret;
 }
 
@@ -406,9 +392,7 @@ static int axp288_charger_usb_get_property(struct power_supply *psy,
 				    union power_supply_propval *val)
 {
 	struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
-	int ret = 0;
-
-	mutex_lock(&info->lock);
+	int ret;
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_PRESENT:
@@ -419,7 +403,7 @@ static int axp288_charger_usb_get_property(struct power_supply *psy,
 		}
 		ret = axp288_charger_is_present(info);
 		if (ret < 0)
-			goto psy_get_prop_fail;
+			return ret;
 		val->intval = ret;
 		break;
 	case POWER_SUPPLY_PROP_ONLINE:
@@ -430,7 +414,7 @@ static int axp288_charger_usb_get_property(struct power_supply *psy,
 		}
 		ret = axp288_charger_is_online(info);
 		if (ret < 0)
-			goto psy_get_prop_fail;
+			return ret;
 		val->intval = ret;
 		break;
 	case POWER_SUPPLY_PROP_HEALTH:
@@ -448,17 +432,17 @@ static int axp288_charger_usb_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 		val->intval = info->max_cv * 1000;
 		break;
-	case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
-		val->intval = info->inlmt * 1000;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = axp288_charger_get_vbus_inlmt(info);
+		if (ret < 0)
+			return ret;
+		val->intval = ret;
 		break;
 	default:
-		ret = -EINVAL;
-		goto psy_get_prop_fail;
+		return -EINVAL;
 	}
 
-psy_get_prop_fail:
-	mutex_unlock(&info->lock);
-	return ret;
+	return 0;
 }
 
 static int axp288_charger_property_is_writeable(struct power_supply *psy,
@@ -469,6 +453,7 @@ static int axp288_charger_property_is_writeable(struct power_supply *psy,
 	switch (psp) {
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 		ret = 1;
 		break;
 	default:
@@ -487,7 +472,7 @@ static enum power_supply_property axp288_usb_props[] = {
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
-	POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 };
 
 static const struct power_supply_desc axp288_charger_desc = {
@@ -565,99 +550,53 @@ static void axp288_charger_extcon_evt_worker(struct work_struct *work)
 	    container_of(work, struct axp288_chrg_info, cable.work);
 	int ret, current_limit;
 	struct extcon_dev *edev = info->cable.edev;
-	bool old_connected = info->cable.connected;
-	enum power_supply_type old_chg_type = info->cable.chg_type;
+	unsigned int val;
+
+	ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
+	if (ret < 0) {
+		dev_err(&info->pdev->dev, "Error reading status (%d)\n", ret);
+		return;
+	}
+
+	/* Offline? Disable charging and bail */
+	if (!(val & PS_STAT_VBUS_VALID)) {
+		dev_dbg(&info->pdev->dev, "USB charger disconnected\n");
+		axp288_charger_enable_charger(info, false);
+		power_supply_changed(info->psy_usb);
+		return;
+	}
 
 	/* Determine cable/charger type */
 	if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
-		dev_dbg(&info->pdev->dev, "USB SDP charger  is connected");
-		info->cable.connected = true;
-		info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
+		dev_dbg(&info->pdev->dev, "USB SDP charger is connected\n");
+		current_limit = 500000;
 	} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
-		dev_dbg(&info->pdev->dev, "USB CDP charger is connected");
-		info->cable.connected = true;
-		info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP;
+		dev_dbg(&info->pdev->dev, "USB CDP charger is connected\n");
+		current_limit = 1500000;
 	} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
-		dev_dbg(&info->pdev->dev, "USB DCP charger is connected");
-		info->cable.connected = true;
-		info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP;
+		dev_dbg(&info->pdev->dev, "USB DCP charger is connected\n");
+		current_limit = 2000000;
 	} else {
-		if (old_connected)
-			dev_dbg(&info->pdev->dev, "USB charger disconnected");
-		info->cable.connected = false;
-		info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
-	}
-
-	/* Cable status changed */
-	if (old_connected == info->cable.connected &&
-	    old_chg_type == info->cable.chg_type)
+		/* Charger type detection still in progress, bail. */
 		return;
-
-	mutex_lock(&info->lock);
-
-	if (info->cable.connected) {
-		axp288_charger_enable_charger(info, false);
-
-		switch (info->cable.chg_type) {
-		case POWER_SUPPLY_TYPE_USB:
-			current_limit = ILIM_500MA;
-			break;
-		case POWER_SUPPLY_TYPE_USB_CDP:
-			current_limit = ILIM_1500MA;
-			break;
-		case POWER_SUPPLY_TYPE_USB_DCP:
-			current_limit = ILIM_2000MA;
-			break;
-		default:
-			/* Unknown */
-			current_limit = 0;
-			break;
-		}
-
-		/* Set vbus current limit first, then enable charger */
-		ret = axp288_charger_set_vbus_inlmt(info, current_limit);
-		if (ret == 0)
-			axp288_charger_enable_charger(info, true);
-		else
-			dev_err(&info->pdev->dev,
-				"error setting current limit (%d)", ret);
-	} else {
-		axp288_charger_enable_charger(info, false);
 	}
 
-	mutex_unlock(&info->lock);
+	/* Set vbus current limit first, then enable charger */
+	ret = axp288_charger_set_vbus_inlmt(info, current_limit);
+	if (ret == 0)
+		axp288_charger_enable_charger(info, true);
+	else
+		dev_err(&info->pdev->dev,
+			"error setting current limit (%d)\n", ret);
 
 	power_supply_changed(info->psy_usb);
 }
 
-/*
- * We need 3 copies of this, because there is no way to find out for which
- * cable id we are being called from the passed in arguments; and we must
- * have a separate nb for each extcon_register_notifier call.
- */
-static int axp288_charger_handle_cable0_evt(struct notifier_block *nb,
-					    unsigned long event, void *param)
+static int axp288_charger_handle_cable_evt(struct notifier_block *nb,
+					   unsigned long event, void *param)
 {
 	struct axp288_chrg_info *info =
-		container_of(nb, struct axp288_chrg_info, cable.nb[0]);
-	schedule_work(&info->cable.work);
-	return NOTIFY_OK;
-}
-
-static int axp288_charger_handle_cable1_evt(struct notifier_block *nb,
-					    unsigned long event, void *param)
-{
-	struct axp288_chrg_info *info =
-		container_of(nb, struct axp288_chrg_info, cable.nb[1]);
-	schedule_work(&info->cable.work);
-	return NOTIFY_OK;
-}
-
-static int axp288_charger_handle_cable2_evt(struct notifier_block *nb,
-					    unsigned long event, void *param)
-{
-	struct axp288_chrg_info *info =
-		container_of(nb, struct axp288_chrg_info, cable.nb[2]);
+		container_of(nb, struct axp288_chrg_info, cable.nb);
 	schedule_work(&info->cable.work);
 	return NOTIFY_OK;
 }
@@ -785,6 +724,14 @@ static int charger_init_hw_regs(struct axp288_chrg_info *info)
 	return 0;
 }
 
+static void axp288_charger_cancel_work(void *data)
+{
+	struct axp288_chrg_info *info = data;
+
+	cancel_work_sync(&info->otg.work);
+	cancel_work_sync(&info->cable.work);
+}
+
 static int axp288_charger_probe(struct platform_device *pdev)
 {
 	int ret, i, pirq;
@@ -799,8 +746,6 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	info->pdev = pdev;
 	info->regmap = axp20x->regmap;
 	info->regmap_irqc = axp20x->regmap_irqc;
-	info->cable.chg_type = -1;
-	info->is_charger_enabled = -1;
 
 	info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
 	if (info->cable.edev == NULL) {
@@ -820,7 +765,6 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, info);
-	mutex_init(&info->lock);
 
 	ret = charger_init_hw_regs(info);
 	if (ret)
@@ -836,19 +780,19 @@ static int axp288_charger_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	/* Cancel our work on cleanup, register this before the notifiers */
+	ret = devm_add_action(dev, axp288_charger_cancel_work, info);
+	if (ret)
+		return ret;
+
 	/* Register for extcon notification */
 	INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
-	info->cable.nb[0].notifier_call = axp288_charger_handle_cable0_evt;
-	info->cable.nb[1].notifier_call = axp288_charger_handle_cable1_evt;
-	info->cable.nb[2].notifier_call = axp288_charger_handle_cable2_evt;
-	for (i = 0; i < ARRAY_SIZE(cable_ids); i++) {
-		ret = devm_extcon_register_notifier(dev, info->cable.edev,
-					  cable_ids[i], &info->cable.nb[i]);
-		if (ret) {
-			dev_err(dev, "failed to register extcon notifier for %u: %d\n",
-				cable_ids[i], ret);
-			return ret;
-		}
+	info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;
+	ret = devm_extcon_register_notifier_all(dev, info->cable.edev,
+						&info->cable.nb);
+	if (ret) {
+		dev_err(dev, "failed to register cable extcon notifier\n");
+		return ret;
 	}
 	schedule_work(&info->cable.work);
 
diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c
index a8dcabc32721..4cc6e038dfdd 100644
--- a/drivers/power/supply/axp288_fuel_gauge.c
+++ b/drivers/power/supply/axp288_fuel_gauge.c
@@ -1,6 +1,7 @@
 /*
  * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
  *
+ * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com>
  * Copyright (C) 2014 Intel Corporation
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -16,6 +17,7 @@
  *
  */
 
+#include <linux/dmi.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
@@ -31,6 +33,12 @@
 #include <linux/seq_file.h>
 #include <asm/unaligned.h>
 
+#define PS_STAT_VBUS_TRIGGER		(1 << 0)
+#define PS_STAT_BAT_CHRG_DIR		(1 << 2)
+#define PS_STAT_VBAT_ABOVE_VHOLD	(1 << 3)
+#define PS_STAT_VBUS_VALID		(1 << 4)
+#define PS_STAT_VBUS_PRESENT		(1 << 5)
+
 #define CHRG_STAT_BAT_SAFE_MODE		(1 << 3)
 #define CHRG_STAT_BAT_VALID			(1 << 4)
 #define CHRG_STAT_BAT_PRESENT		(1 << 5)
@@ -100,11 +108,22 @@ enum {
 	WL1_IRQ,
 };
 
+enum {
+	BAT_TEMP = 0,
+	PMIC_TEMP,
+	SYSTEM_TEMP,
+	BAT_CHRG_CURR,
+	BAT_D_CURR,
+	BAT_VOLT,
+	IIO_CHANNEL_NUM
+};
+
 struct axp288_fg_info {
 	struct platform_device *pdev;
 	struct regmap *regmap;
 	struct regmap_irq_chip_data *regmap_irqc;
 	int irq[AXP288_FG_INTR_NUM];
+	struct iio_channel *iio_channel[IIO_CHANNEL_NUM];
 	struct power_supply *bat;
 	struct mutex lock;
 	int status;
@@ -199,33 +218,6 @@ static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg)
 	return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f);
 }
 
-static int pmic_read_adc_val(const char *name, int *raw_val,
-		struct axp288_fg_info *info)
-{
-	int ret, val = 0;
-	struct iio_channel *indio_chan;
-
-	indio_chan = iio_channel_get(NULL, name);
-	if (IS_ERR_OR_NULL(indio_chan)) {
-		ret = PTR_ERR(indio_chan);
-		goto exit;
-	}
-	ret = iio_read_channel_raw(indio_chan, &val);
-	if (ret < 0) {
-		dev_err(&info->pdev->dev,
-			"IIO channel read error: %x, %x\n", ret, val);
-		goto err_exit;
-	}
-
-	dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val);
-	*raw_val = val;
-
-err_exit:
-	iio_channel_release(indio_chan);
-exit:
-	return ret;
-}
-
 #ifdef CONFIG_DEBUG_FS
 static int fuel_gauge_debug_show(struct seq_file *s, void *data)
 {
@@ -296,22 +288,22 @@ static int fuel_gauge_debug_show(struct seq_file *s, void *data)
 		AXP288_FG_TUNE5,
 		fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
 
-	ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[BAT_TEMP], &raw_val);
 	if (ret >= 0)
 		seq_printf(s, "axp288-batttemp : %d\n", raw_val);
-	ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[PMIC_TEMP], &raw_val);
 	if (ret >= 0)
 		seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
-	ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[SYSTEM_TEMP], &raw_val);
 	if (ret >= 0)
 		seq_printf(s, "axp288-systtemp : %d\n", raw_val);
-	ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], &raw_val);
 	if (ret >= 0)
 		seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
-	ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &raw_val);
 	if (ret >= 0)
 		seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
-	ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val);
 	if (ret >= 0)
 		seq_printf(s, "axp288-battvolt : %d\n", raw_val);
 
@@ -351,8 +343,7 @@ static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
 
 static void fuel_gauge_get_status(struct axp288_fg_info *info)
 {
-	int pwr_stat, ret;
-	int charge, discharge;
+	int pwr_stat, fg_res;
 
 	pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
 	if (pwr_stat < 0) {
@@ -360,36 +351,32 @@ static void fuel_gauge_get_status(struct axp288_fg_info *info)
 			"PWR STAT read failed:%d\n", pwr_stat);
 		return;
 	}
-	ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
-	if (ret < 0) {
-		dev_err(&info->pdev->dev,
-			"ADC charge current read failed:%d\n", ret);
-		return;
-	}
-	ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
-	if (ret < 0) {
-		dev_err(&info->pdev->dev,
-			"ADC discharge current read failed:%d\n", ret);
-		return;
+
+	/* Report full if Vbus is valid and the reported capacity is 100% */
+	if (pwr_stat & PS_STAT_VBUS_VALID) {
+		fg_res = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
+		if (fg_res < 0) {
+			dev_err(&info->pdev->dev,
+				"FG RES read failed: %d\n", fg_res);
+			return;
+		}
+		if (fg_res == (FG_REP_CAP_VALID | 100)) {
+			info->status = POWER_SUPPLY_STATUS_FULL;
+			return;
+		}
 	}
 
-	if (charge > 0)
+	if (pwr_stat & PS_STAT_BAT_CHRG_DIR)
 		info->status = POWER_SUPPLY_STATUS_CHARGING;
-	else if (discharge > 0)
+	else
 		info->status = POWER_SUPPLY_STATUS_DISCHARGING;
-	else {
-		if (pwr_stat & CHRG_STAT_BAT_PRESENT)
-			info->status = POWER_SUPPLY_STATUS_FULL;
-		else
-			info->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
-	}
 }
 
 static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
 {
 	int ret = 0, raw_val;
 
-	ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
+	ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val);
 	if (ret < 0)
 		goto vbatt_read_fail;
 
@@ -400,24 +387,19 @@ vbatt_read_fail:
 
 static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
 {
-	int ret, value = 0;
-	int charge, discharge;
+	int ret, discharge;
 
-	ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
-	if (ret < 0)
-		goto current_read_fail;
-	ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
+	/* First check discharge current, so that we do only 1 read on bat. */
+	ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &discharge);
 	if (ret < 0)
-		goto current_read_fail;
+		return ret;
 
-	if (charge > 0)
-		value = charge;
-	else if (discharge > 0)
-		value = -1 * discharge;
+	if (discharge > 0) {
+		*cur = -1 * discharge;
+		return 0;
+	}
 
-	*cur = value;
-current_read_fail:
-	return ret;
+	return iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], cur);
 }
 
 static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
@@ -698,12 +680,54 @@ intr_failed:
 	}
 }
 
+/*
+ * Some devices have no battery (HDMI sticks) and the axp288 battery's
+ * detection reports one despite it not being there.
+ */
+static const struct dmi_system_id axp288_fuel_gauge_blacklist[] = {
+	{
+		/* Intel Cherry Trail Compute Stick, Windows version */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"),
+		},
+	},
+	{
+		/* Intel Cherry Trail Compute Stick, version without an OS */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"),
+		},
+	},
+	{
+		/* Meegopad T08 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Default string"),
+			DMI_MATCH(DMI_BOARD_VENDOR, "To be filled by OEM."),
+			DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"),
+			DMI_MATCH(DMI_BOARD_VERSION, "V1.1"),
+		},
+	},
+	{}
+};
+
 static int axp288_fuel_gauge_probe(struct platform_device *pdev)
 {
-	int ret = 0;
+	int i, ret = 0;
 	struct axp288_fg_info *info;
 	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 	struct power_supply_config psy_cfg = {};
+	static const char * const iio_chan_name[] = {
+		[BAT_TEMP] = "axp288-batt-temp",
+		[PMIC_TEMP] = "axp288-pmic-temp",
+		[SYSTEM_TEMP] = "axp288-system-temp",
+		[BAT_CHRG_CURR] = "axp288-chrg-curr",
+		[BAT_D_CURR] = "axp288-chrg-d-curr",
+		[BAT_VOLT] = "axp288-batt-volt",
+	};
+
+	if (dmi_check_system(axp288_fuel_gauge_blacklist))
+		return -ENODEV;
 
 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
@@ -719,18 +743,39 @@ static int axp288_fuel_gauge_probe(struct platform_device *pdev)
 	mutex_init(&info->lock);
 	INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
 
+	for (i = 0; i < IIO_CHANNEL_NUM; i++) {
+		/*
+		 * Note cannot use devm_iio_channel_get because x86 systems
+		 * lack the device<->channel maps which iio_channel_get will
+		 * try to use when passed a non NULL device pointer.
+		 */
+		info->iio_channel[i] =
+			iio_channel_get(NULL, iio_chan_name[i]);
+		if (IS_ERR(info->iio_channel[i])) {
+			ret = PTR_ERR(info->iio_channel[i]);
+			dev_dbg(&pdev->dev, "error getting iiochan %s: %d\n",
+				iio_chan_name[i], ret);
+			/* Wait for axp288_adc to load */
+			if (ret == -ENODEV)
+				ret = -EPROBE_DEFER;
+
+			goto out_free_iio_chan;
+		}
+	}
+
 	ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
 	if (ret < 0)
-		return ret;
+		goto out_free_iio_chan;
 
 	if (!(ret & FG_DES_CAP1_VALID)) {
 		dev_err(&pdev->dev, "axp288 not configured by firmware\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto out_free_iio_chan;
 	}
 
 	ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
 	if (ret < 0)
-		return ret;
+		goto out_free_iio_chan;
 	switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) {
 	case CHRG_CCCV_CV_4100MV:
 		info->max_volt = 4100;
@@ -751,7 +796,7 @@ static int axp288_fuel_gauge_probe(struct platform_device *pdev)
 	if (IS_ERR(info->bat)) {
 		ret = PTR_ERR(info->bat);
 		dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
-		return ret;
+		goto out_free_iio_chan;
 	}
 
 	fuel_gauge_create_debugfs(info);
@@ -759,6 +804,13 @@ static int axp288_fuel_gauge_probe(struct platform_device *pdev)
 	schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
 
 	return 0;
+
+out_free_iio_chan:
+	for (i = 0; i < IIO_CHANNEL_NUM; i++)
+		if (!IS_ERR_OR_NULL(info->iio_channel[i]))
+			iio_channel_release(info->iio_channel[i]);
+
+	return ret;
 }
 
 static const struct platform_device_id axp288_fg_id_table[] = {
@@ -780,6 +832,9 @@ static int axp288_fuel_gauge_remove(struct platform_device *pdev)
 		if (info->irq[i] >= 0)
 			free_irq(info->irq[i], info);
 
+	for (i = 0; i < IIO_CHANNEL_NUM; i++)
+		iio_channel_release(info->iio_channel[i]);
+
 	return 0;
 }
 
diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index 35ff406aca48..b58df04d03b3 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -11,7 +11,6 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
-#include <linux/extcon.h>
 #include <linux/of_irq.h>
 #include <linux/of_device.h>
 #include <linux/pm_runtime.h>
@@ -162,9 +161,6 @@ struct bq24190_dev_info {
 	struct device			*dev;
 	struct power_supply		*charger;
 	struct power_supply		*battery;
-	struct extcon_dev		*extcon;
-	struct notifier_block		extcon_nb;
-	struct delayed_work		extcon_work;
 	struct delayed_work		input_current_limit_work;
 	char				model_name[I2C_NAME_SIZE];
 	bool				initialized;
@@ -686,6 +682,16 @@ static int bq24190_register_reset(struct bq24190_dev_info *bdi)
 	int ret, limit = 100;
 	u8 v;
 
+	/*
+	 * This prop. can be passed on device instantiation from platform code:
+	 * struct property_entry pe[] =
+	 *   { PROPERTY_ENTRY_BOOL("disable-reset"), ... };
+	 * struct i2c_board_info bi =
+	 *   { .type = "bq24190", .addr = 0x6b, .properties = pe, .irq = irq };
+	 * struct i2c_adapter ad = { ... };
+	 * i2c_add_adapter(&ad);
+	 * i2c_new_device(&ad, &bi);
+	 */
 	if (device_property_read_bool(bdi->dev, "disable-reset"))
 		return 0;
 
@@ -1193,8 +1199,6 @@ static int bq24190_charger_set_property(struct power_supply *psy,
 static int bq24190_charger_property_is_writeable(struct power_supply *psy,
 		enum power_supply_property psp)
 {
-	int ret;
-
 	switch (psp) {
 	case POWER_SUPPLY_PROP_ONLINE:
 	case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
@@ -1202,13 +1206,10 @@ static int bq24190_charger_property_is_writeable(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
-		ret = 1;
-		break;
+		return 1;
 	default:
-		ret = 0;
+		return 0;
 	}
-
-	return ret;
 }
 
 static void bq24190_input_current_limit_work(struct work_struct *work)
@@ -1623,75 +1624,6 @@ static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static void bq24190_extcon_work(struct work_struct *work)
-{
-	struct bq24190_dev_info *bdi =
-		container_of(work, struct bq24190_dev_info, extcon_work.work);
-	int error, iinlim = 0;
-	u8 v;
-
-	error = pm_runtime_get_sync(bdi->dev);
-	if (error < 0) {
-		dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
-		pm_runtime_put_noidle(bdi->dev);
-		return;
-	}
-
-	if      (extcon_get_state(bdi->extcon, EXTCON_CHG_USB_SDP) == 1)
-		iinlim =  500000;
-	else if (extcon_get_state(bdi->extcon, EXTCON_CHG_USB_CDP) == 1 ||
-		 extcon_get_state(bdi->extcon, EXTCON_CHG_USB_ACA) == 1)
-		iinlim = 1500000;
-	else if (extcon_get_state(bdi->extcon, EXTCON_CHG_USB_DCP) == 1)
-		iinlim = 2000000;
-
-	if (iinlim) {
-		error = bq24190_set_field_val(bdi, BQ24190_REG_ISC,
-					      BQ24190_REG_ISC_IINLIM_MASK,
-					      BQ24190_REG_ISC_IINLIM_SHIFT,
-					      bq24190_isc_iinlim_values,
-					      ARRAY_SIZE(bq24190_isc_iinlim_values),
-					      iinlim);
-		if (error < 0)
-			dev_err(bdi->dev, "Can't set IINLIM: %d\n", error);
-	}
-
-	/* if no charger found and in USB host mode, set OTG 5V boost, else normal */
-	if (!iinlim && extcon_get_state(bdi->extcon, EXTCON_USB_HOST) == 1)
-		v = BQ24190_REG_POC_CHG_CONFIG_OTG;
-	else
-		v = BQ24190_REG_POC_CHG_CONFIG_CHARGE;
-
-	error = bq24190_write_mask(bdi, BQ24190_REG_POC,
-				   BQ24190_REG_POC_CHG_CONFIG_MASK,
-				   BQ24190_REG_POC_CHG_CONFIG_SHIFT,
-				   v);
-	if (error < 0)
-		dev_err(bdi->dev, "Can't set CHG_CONFIG: %d\n", error);
-
-	pm_runtime_mark_last_busy(bdi->dev);
-	pm_runtime_put_autosuspend(bdi->dev);
-}
-
-static int bq24190_extcon_event(struct notifier_block *nb, unsigned long event,
-				void *param)
-{
-	struct bq24190_dev_info *bdi =
-		container_of(nb, struct bq24190_dev_info, extcon_nb);
-
-	/*
-	 * The Power-Good detection may take up to 220ms, sometimes
-	 * the external charger detection is quicker, and the bq24190 will
-	 * reset to iinlim based on its own charger detection (which is not
-	 * hooked up when using external charger detection) resulting in
-	 * a too low default 500mA iinlim. Delay applying the extcon value
-	 * for 300ms to avoid this.
-	 */
-	queue_delayed_work(system_wq, &bdi->extcon_work, msecs_to_jiffies(300));
-
-	return NOTIFY_OK;
-}
-
 static int bq24190_hw_init(struct bq24190_dev_info *bdi)
 {
 	u8 v;
@@ -1766,7 +1698,6 @@ static int bq24190_probe(struct i2c_client *client,
 	struct device *dev = &client->dev;
 	struct power_supply_config charger_cfg = {}, battery_cfg = {};
 	struct bq24190_dev_info *bdi;
-	const char *name;
 	int ret;
 
 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
@@ -1796,25 +1727,6 @@ static int bq24190_probe(struct i2c_client *client,
 		return -EINVAL;
 	}
 
-	/*
-	 * Devicetree platforms should get extcon via phandle (not yet supported).
-	 * On ACPI platforms, extcon clients may invoke us with:
-	 * struct property_entry pe[] =
-	 *   { PROPERTY_ENTRY_STRING("extcon-name", client_name), ... };
-	 * struct i2c_board_info bi =
-	 *   { .type = "bq24190", .addr = 0x6b, .properties = pe, .irq = irq };
-	 * struct i2c_adapter ad = { ... };
-	 * i2c_add_adapter(&ad);
-	 * i2c_new_device(&ad, &bi);
-	 */
-	if (device_property_read_string(dev, "extcon-name", &name) == 0) {
-		bdi->extcon = extcon_get_extcon_dev(name);
-		if (!bdi->extcon)
-			return -EPROBE_DEFER;
-
-		dev_info(bdi->dev, "using extcon device %s\n", name);
-	}
-
 	pm_runtime_enable(dev);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_set_autosuspend_delay(dev, 600);
@@ -1882,20 +1794,6 @@ static int bq24190_probe(struct i2c_client *client,
 	if (ret < 0)
 		goto out_sysfs;
 
-	if (bdi->extcon) {
-		INIT_DELAYED_WORK(&bdi->extcon_work, bq24190_extcon_work);
-		bdi->extcon_nb.notifier_call = bq24190_extcon_event;
-		ret = devm_extcon_register_notifier_all(dev, bdi->extcon,
-							&bdi->extcon_nb);
-		if (ret) {
-			dev_err(dev, "Can't register extcon\n");
-			goto out_sysfs;
-		}
-
-		/* Sync initial cable state */
-		queue_delayed_work(system_wq, &bdi->extcon_work, 0);
-	}
-
 	enable_irq_wake(client->irq);
 
 	pm_runtime_mark_last_busy(dev);
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 51f0961ecf3e..d99981542a46 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -323,6 +323,30 @@ static u8
 		[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 		BQ27XXX_DM_REG_ROWS,
 	},
+	bq27521_regs[BQ27XXX_REG_MAX] = {
+		[BQ27XXX_REG_CTRL] = 0x02,
+		[BQ27XXX_REG_TEMP] = 0x0a,
+		[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_VOLT] = 0x0c,
+		[BQ27XXX_REG_AI] = 0x0e,
+		[BQ27XXX_REG_FLAGS] = 0x08,
+		[BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
+	},
 	bq27530_regs[BQ27XXX_REG_MAX] = {
 		[BQ27XXX_REG_CTRL] = 0x00,
 		[BQ27XXX_REG_TEMP] = 0x06,
@@ -557,6 +581,15 @@ static enum power_supply_property bq27520g4_props[] = {
 	POWER_SUPPLY_PROP_MANUFACTURER,
 };
 
+static enum power_supply_property bq27521_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+};
+
 static enum power_supply_property bq27530_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_PRESENT,
@@ -671,6 +704,7 @@ static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 #define bq27520g2_dm_regs 0
 #define bq27520g3_dm_regs 0
 #define bq27520g4_dm_regs 0
+#define bq27521_dm_regs 0
 #define bq27530_dm_regs 0
 #define bq27531_dm_regs 0
 #define bq27541_dm_regs 0
@@ -717,8 +751,8 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 #endif
 
 #define BQ27XXX_O_ZERO	0x00000001
-#define BQ27XXX_O_OTDC	0x00000002
-#define BQ27XXX_O_UTOT  0x00000004
+#define BQ27XXX_O_OTDC	0x00000002 /* has OTC/OTD overtemperature flags */
+#define BQ27XXX_O_UTOT  0x00000004 /* has OT overtemperature flag */
 #define BQ27XXX_O_CFGUP	0x00000008
 #define BQ27XXX_O_RAM	0x00000010
 
@@ -751,6 +785,7 @@ static struct {
 	[BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 	[BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 	[BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
+	[BQ27521]   = BQ27XXX_DATA(bq27521,   0         , 0),
 	[BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 	[BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
 	[BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
index 0b11ed472f33..6b25e5f2337e 100644
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -239,6 +239,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
 	{ "bq27520g2", BQ27520G2 },
 	{ "bq27520g3", BQ27520G3 },
 	{ "bq27520g4", BQ27520G4 },
+	{ "bq27521", BQ27521 },
 	{ "bq27530", BQ27530 },
 	{ "bq27531", BQ27531 },
 	{ "bq27541", BQ27541 },
@@ -269,6 +270,7 @@ static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
 	{ .compatible = "ti,bq27520g2" },
 	{ .compatible = "ti,bq27520g3" },
 	{ .compatible = "ti,bq27520g4" },
+	{ .compatible = "ti,bq27521" },
 	{ .compatible = "ti,bq27530" },
 	{ .compatible = "ti,bq27531" },
 	{ .compatible = "ti,bq27541" },
diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index 6502fa7c2106..1de4b4493824 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -578,7 +578,7 @@ static int check_charging_duration(struct charger_manager *cm)
 	} else if (is_ext_pwr_online(cm) && !cm->charger_enabled) {
 		duration = curr - cm->charging_end_time;
 
-		if (duration > desc->charging_max_duration_ms &&
+		if (duration > desc->discharging_max_duration_ms &&
 				is_ext_pwr_online(cm)) {
 			dev_info(cm->dev, "Discharging duration exceed %ums\n",
 				 desc->discharging_max_duration_ms);
diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c
index ee71a2b37b12..98ba07869c3b 100644
--- a/drivers/power/supply/cpcap-battery.c
+++ b/drivers/power/supply/cpcap-battery.c
@@ -586,8 +586,8 @@ static int cpcap_battery_init_irq(struct platform_device *pdev,
 	int irq, error;
 
 	irq = platform_get_irq_byname(pdev, name);
-	if (!irq)
-		return -ENODEV;
+	if (irq < 0)
+		return irq;
 
 	error = devm_request_threaded_irq(ddata->dev, irq, NULL,
 					  cpcap_battery_irq_thread,
diff --git a/drivers/power/supply/ltc2941-battery-gauge.c b/drivers/power/supply/ltc2941-battery-gauge.c
index 08e4fd9ee607..4cfa3f0cd689 100644
--- a/drivers/power/supply/ltc2941-battery-gauge.c
+++ b/drivers/power/supply/ltc2941-battery-gauge.c
@@ -60,6 +60,7 @@ enum ltc294x_id {
 #define LTC294X_REG_CONTROL_PRESCALER_SET(x) \
 	((x << 3) & LTC294X_REG_CONTROL_PRESCALER_MASK)
 #define LTC294X_REG_CONTROL_ALCC_CONFIG_DISABLED	0
+#define LTC294X_REG_CONTROL_ADC_DISABLE(x)	((x) & ~(BIT(7) | BIT(6)))
 
 struct ltc294x_info {
 	struct i2c_client *client;	/* I2C Client pointer */
@@ -523,6 +524,29 @@ static int ltc294x_i2c_probe(struct i2c_client *client,
 	return 0;
 }
 
+static void ltc294x_i2c_shutdown(struct i2c_client *client)
+{
+	struct ltc294x_info *info = i2c_get_clientdata(client);
+	int ret;
+	u8 value;
+	u8 control;
+
+	/* The LTC2941 does not need any special handling */
+	if (info->id == LTC2941_ID)
+		return;
+
+	/* Read control register */
+	ret = ltc294x_read_regs(info->client, LTC294X_REG_CONTROL, &value, 1);
+	if (ret < 0)
+		return;
+
+	/* Disable continuous ADC conversion as this drains the battery */
+	control = LTC294X_REG_CONTROL_ADC_DISABLE(value);
+	if (control != value)
+		ltc294x_write_regs(info->client, LTC294X_REG_CONTROL,
+			&control, 1);
+}
+
 #ifdef CONFIG_PM_SLEEP
 
 static int ltc294x_suspend(struct device *dev)
@@ -589,6 +613,7 @@ static struct i2c_driver ltc294x_driver = {
 	},
 	.probe		= ltc294x_i2c_probe,
 	.remove		= ltc294x_i2c_remove,
+	.shutdown	= ltc294x_i2c_shutdown,
 	.id_table	= ltc294x_i2c_id,
 };
 module_i2c_driver(ltc294x_driver);
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c
index 5b556a13f517..35dde81b1c9b 100644
--- a/drivers/power/supply/max17042_battery.c
+++ b/drivers/power/supply/max17042_battery.c
@@ -123,6 +123,8 @@ static int max17042_get_temperature(struct max17042_chip *chip, int *temp)
 static int max17042_get_status(struct max17042_chip *chip, int *status)
 {
 	int ret, charge_full, charge_now;
+	int avg_current;
+	u32 data;
 
 	ret = power_supply_am_i_supplied(chip->battery);
 	if (ret < 0) {
@@ -152,10 +154,31 @@ static int max17042_get_status(struct max17042_chip *chip, int *status)
 	if (ret < 0)
 		return ret;
 
-	if ((charge_full - charge_now) <= MAX17042_FULL_THRESHOLD)
+	if ((charge_full - charge_now) <= MAX17042_FULL_THRESHOLD) {
 		*status = POWER_SUPPLY_STATUS_FULL;
-	else
+		return 0;
+	}
+
+	/*
+	 * Even though we are supplied, we may still be discharging if the
+	 * supply is e.g. only delivering 5V 0.5A. Check current if available.
+	 */
+	if (!chip->pdata->enable_current_sense) {
 		*status = POWER_SUPPLY_STATUS_CHARGING;
+		return 0;
+	}
+
+	ret = regmap_read(chip->regmap, MAX17042_AvgCurrent, &data);
+	if (ret < 0)
+		return ret;
+
+	avg_current = sign_extend32(data, 15);
+	avg_current *= 1562500 / chip->pdata->r_sns;
+
+	if (avg_current > 0)
+		*status = POWER_SUPPLY_STATUS_CHARGING;
+	else
+		*status = POWER_SUPPLY_STATUS_DISCHARGING;
 
 	return 0;
 }
@@ -863,16 +886,13 @@ static void max17042_init_worker(struct work_struct *work)
 
 #ifdef CONFIG_OF
 static struct max17042_platform_data *
-max17042_get_pdata(struct max17042_chip *chip)
+max17042_get_of_pdata(struct max17042_chip *chip)
 {
 	struct device *dev = &chip->client->dev;
 	struct device_node *np = dev->of_node;
 	u32 prop;
 	struct max17042_platform_data *pdata;
 
-	if (!np)
-		return dev->platform_data;
-
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
 		return NULL;
@@ -897,7 +917,8 @@ max17042_get_pdata(struct max17042_chip *chip)
 
 	return pdata;
 }
-#else
+#endif
+
 static struct max17042_reg_data max17047_default_pdata_init_regs[] = {
 	/*
 	 * Some firmwares do not set FullSOCThr, Enable End-of-Charge Detection
@@ -907,15 +928,12 @@ static struct max17042_reg_data max17047_default_pdata_init_regs[] = {
 };
 
 static struct max17042_platform_data *
-max17042_get_pdata(struct max17042_chip *chip)
+max17042_get_default_pdata(struct max17042_chip *chip)
 {
 	struct device *dev = &chip->client->dev;
 	struct max17042_platform_data *pdata;
 	int ret, misc_cfg;
 
-	if (dev->platform_data)
-		return dev->platform_data;
-
 	/*
 	 * The MAX17047 gets used on x86 where we might not have pdata, assume
 	 * the firmware will already have initialized the fuel-gauge and provide
@@ -948,7 +966,21 @@ max17042_get_pdata(struct max17042_chip *chip)
 
 	return pdata;
 }
+
+static struct max17042_platform_data *
+max17042_get_pdata(struct max17042_chip *chip)
+{
+	struct device *dev = &chip->client->dev;
+
+#ifdef CONFIG_OF
+	if (dev->of_node)
+		return max17042_get_of_pdata(chip);
 #endif
+	if (dev->platform_data)
+		return dev->platform_data;
+
+	return max17042_get_default_pdata(chip);
+}
 
 static const struct regmap_config max17042_regmap_config = {
 	.reg_bits = 8,
diff --git a/drivers/power/supply/sbs-manager.c b/drivers/power/supply/sbs-manager.c
index ccb4217b9638..cb6e8f66c7a2 100644
--- a/drivers/power/supply/sbs-manager.c
+++ b/drivers/power/supply/sbs-manager.c
@@ -183,7 +183,7 @@ static int sbsm_select(struct i2c_mux_core *muxc, u32 chan)
 		return ret;
 
 	/* chan goes from 1 ... 4 */
-	reg = 1 << BIT(SBSM_SMB_BAT_OFFSET + chan);
+	reg = BIT(SBSM_SMB_BAT_OFFSET + chan);
 	ret = sbsm_write_word(data->client, SBSM_CMD_BATSYSSTATE, reg);
 	if (ret)
 		dev_err(dev, "Failed to select channel %i\n", chan);