Merge tag 'for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:
 "Core:
   - Add over-current health state
   - Add standard, adaptive and custom charge types
   - Add new properties for start/end charge threshold

  New Drivers / Hardware:
   - UCS1002 Programmable USB Port Power Controller
   - Ingenic JZ47xx Battery Fuel Gauge
   - AXP20x USB Power: Add AXP813 support
   - AT91 poweroff: Add SAM9X60 support
   - OLPC battery: Add XO-1.5 and XO-1.75 support

  Misc Changes:
   - syscon-reboot: support mask property
   - AXP288 fuel gauge: Blacklist ACEPC T8/T11. Looks like some vendor
     thought it's a good idea to build a desktop system with a fuel
     gauge, that slowly "discharges"...
   - cpcap-battery: Fix calculation errors
   - misc fixes"

* tag 'for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (54 commits)
  power: supply: olpc_battery: force the le/be casts
  power: supply: ucs1002: Fix build error without CONFIG_REGULATOR
  power: supply: ucs1002: Fix wrong return value checking
  power: supply: Add driver for Microchip UCS1002
  dt-bindings: power: supply: Add bindings for Microchip UCS1002
  power: supply: core: Add POWER_SUPPLY_HEALTH_OVERCURRENT constant
  power: supply: core: fix clang -Wunsequenced
  power: supply: core: Add missing documentation for CHARGE_CONTROL_* properties
  power: supply: core: Add CHARGE_CONTROL_{START_THRESHOLD,END_THRESHOLD} properties
  power: supply: core: Add Standard, Adaptive, and Custom charge types
  power: supply: axp288_fuel_gauge: Add ACEPC T8 and T11 mini PCs to the blacklist
  power: supply: bq27xxx_battery: Notify also about status changes
  power: supply: olpc_battery: Have the framework register sysfs files for us
  power: supply: olpc_battery: Add OLPC XO 1.75 support
  power: supply: olpc_battery: Avoid using platform_info
  power: supply: olpc_battery: Use devm_power_supply_register()
  power: supply: olpc_battery: Move priv data to a struct
  power: supply: olpc_battery: Use DT to get battery version
  x86/platform/olpc: Use a correct version when making up a battery node
  x86/platform/olpc: Trivial code move in DT fixup
  ...

20 files changed, 1367 insertions, 221 deletions

diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c
index 2b686c55b717..e341cc5c0ea6 100644
--- a/drivers/power/reset/at91-sama5d2_shdwc.c
+++ b/drivers/power/reset/at91-sama5d2_shdwc.c
@@ -57,15 +57,21 @@
 
 #define SHDW_WK_PIN(reg, cfg)	((reg) & AT91_SHDW_WKUPIS((cfg)->wkup_pin_input))
 #define SHDW_RTCWK(reg, cfg)	(((reg) >> ((cfg)->sr_rtcwk_shift)) & 0x1)
+#define SHDW_RTTWK(reg, cfg)	(((reg) >> ((cfg)->sr_rttwk_shift)) & 0x1)
 #define SHDW_RTCWKEN(cfg)	(1 << ((cfg)->mr_rtcwk_shift))
+#define SHDW_RTTWKEN(cfg)	(1 << ((cfg)->mr_rttwk_shift))
 
 #define DBC_PERIOD_US(x)	DIV_ROUND_UP_ULL((1000000 * (x)), \
 							SLOW_CLOCK_FREQ)
 
+#define SHDW_CFG_NOT_USED	(32)
+
 struct shdwc_config {
 	u8 wkup_pin_input;
 	u8 mr_rtcwk_shift;
+	u8 mr_rttwk_shift;
 	u8 sr_rtcwk_shift;
+	u8 sr_rttwk_shift;
 };
 
 struct shdwc {
@@ -104,6 +110,8 @@ static void __init at91_wakeup_status(struct platform_device *pdev)
 		reason = "WKUP pin";
 	else if (SHDW_RTCWK(reg, shdw->cfg))
 		reason = "RTC";
+	else if (SHDW_RTTWK(reg, shdw->cfg))
+		reason = "RTT";
 
 	pr_info("AT91: Wake-Up source: %s\n", reason);
 }
@@ -221,6 +229,9 @@ static void at91_shdwc_dt_configure(struct platform_device *pdev)
 	if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
 		mode |= SHDW_RTCWKEN(shdw->cfg);
 
+	if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
+		mode |= SHDW_RTTWKEN(shdw->cfg);
+
 	dev_dbg(&pdev->dev, "%s: mode = %#x\n", __func__, mode);
 	writel(mode, shdw->shdwc_base + AT91_SHDW_MR);
 
@@ -231,13 +242,27 @@ static void at91_shdwc_dt_configure(struct platform_device *pdev)
 static const struct shdwc_config sama5d2_shdwc_config = {
 	.wkup_pin_input = 0,
 	.mr_rtcwk_shift = 17,
+	.mr_rttwk_shift	= SHDW_CFG_NOT_USED,
 	.sr_rtcwk_shift = 5,
+	.sr_rttwk_shift = SHDW_CFG_NOT_USED,
+};
+
+static const struct shdwc_config sam9x60_shdwc_config = {
+	.wkup_pin_input = 0,
+	.mr_rtcwk_shift = 17,
+	.mr_rttwk_shift = 16,
+	.sr_rtcwk_shift = 5,
+	.sr_rttwk_shift = 4,
 };
 
 static const struct of_device_id at91_shdwc_of_match[] = {
 	{
 		.compatible = "atmel,sama5d2-shdwc",
 		.data = &sama5d2_shdwc_config,
+	},
+	{
+		.compatible = "microchip,sam9x60-shdwc",
+		.data = &sam9x60_shdwc_config,
 	}, {
 		/*sentinel*/
 	}
diff --git a/drivers/power/reset/syscon-reboot.c b/drivers/power/reset/syscon-reboot.c
index 7d0d269a0837..5a6bb638c331 100644
--- a/drivers/power/reset/syscon-reboot.c
+++ b/drivers/power/reset/syscon-reboot.c
@@ -27,6 +27,7 @@
 struct syscon_reboot_context {
 	struct regmap *map;
 	u32 offset;
+	u32 value;
 	u32 mask;
 	struct notifier_block restart_handler;
 };
@@ -39,7 +40,7 @@ static int syscon_restart_handle(struct notifier_block *this,
 					restart_handler);
 
 	/* Issue the reboot */
-	regmap_write(ctx->map, ctx->offset, ctx->mask);
+	regmap_update_bits(ctx->map, ctx->offset, ctx->mask, ctx->value);
 
 	mdelay(1000);
 
@@ -51,6 +52,7 @@ static int syscon_reboot_probe(struct platform_device *pdev)
 {
 	struct syscon_reboot_context *ctx;
 	struct device *dev = &pdev->dev;
+	int mask_err, value_err;
 	int err;
 
 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
@@ -64,8 +66,21 @@ static int syscon_reboot_probe(struct platform_device *pdev)
 	if (of_property_read_u32(pdev->dev.of_node, "offset", &ctx->offset))
 		return -EINVAL;
 
-	if (of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask))
+	value_err = of_property_read_u32(pdev->dev.of_node, "value", &ctx->value);
+	mask_err = of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask);
+	if (value_err && mask_err) {
+		dev_err(dev, "unable to read 'value' and 'mask'");
 		return -EINVAL;
+	}
+
+	if (value_err) {
+		/* support old binding */
+		ctx->value = ctx->mask;
+		ctx->mask = 0xFFFFFFFF;
+	} else if (mask_err) {
+		/* support value without mask*/
+		ctx->mask = 0xFFFFFFFF;
+	}
 
 	ctx->restart_handler.notifier_call = syscon_restart_handle;
 	ctx->restart_handler.priority = 192;
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 0230c96fa94d..26dacdab03cc 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -169,6 +169,17 @@ config BATTERY_COLLIE
 	  Say Y to enable support for the battery on the Sharp Zaurus
 	  SL-5500 (collie) models.
 
+config BATTERY_INGENIC
+	tristate "Ingenic JZ47xx SoCs battery driver"
+	depends on MIPS || COMPILE_TEST
+	depends on INGENIC_ADC
+	help
+	  Choose this option if you want to monitor battery status on
+	  Ingenic JZ47xx SoC based devices.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called ingenic-battery.
+
 config BATTERY_IPAQ_MICRO
 	tristate "iPAQ Atmel Micro ASIC battery driver"
 	depends on MFD_IPAQ_MICRO
@@ -475,12 +486,12 @@ config CHARGER_MANAGER
           runtime and in suspend-to-RAM by waking up the system periodically
           with help of suspend_again support.
 
-config CHARGER_LTC3651
-	tristate "LTC3651 charger"
+config CHARGER_LT3651
+	tristate "Analog Devices LT3651 charger"
 	depends on GPIOLIB
 	help
-	  Say Y to include support for the LTC3651 battery charger which reports
-	  its status via GPIO lines.
+	  Say Y to include support for the Analog Devices (Linear Technology)
+	  LT3651 battery charger which reports its status via GPIO lines.
 
 config CHARGER_MAX14577
 	tristate "Maxim MAX14577/77836 battery charger driver"
@@ -667,4 +678,14 @@ config FUEL_GAUGE_SC27XX
 	 Say Y here to enable support for fuel gauge with SC27XX
 	 PMIC chips.
 
+config CHARGER_UCS1002
+	tristate "Microchip UCS1002 USB Port Power Controller"
+	depends on I2C
+	depends on OF
+	depends on REGULATOR
+	select REGMAP_I2C
+	help
+	  Say Y to enable support for Microchip UCS1002 Programmable
+	  USB Port Power Controller with Charger Emulation.
+
 endif # POWER_SUPPLY
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index b73eb8c5c1a9..f208273f9686 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_BATTERY_PMU)	+= pmu_battery.o
 obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o
 obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
 obj-$(CONFIG_BATTERY_COLLIE)	+= collie_battery.o
+obj-$(CONFIG_BATTERY_INGENIC)	+= ingenic-battery.o
 obj-$(CONFIG_BATTERY_IPAQ_MICRO) += ipaq_micro_battery.o
 obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o
 obj-$(CONFIG_BATTERY_SBS)	+= sbs-battery.o
@@ -67,7 +68,7 @@ obj-$(CONFIG_CHARGER_LP8727)	+= lp8727_charger.o
 obj-$(CONFIG_CHARGER_LP8788)	+= lp8788-charger.o
 obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o
 obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o
-obj-$(CONFIG_CHARGER_LTC3651)	+= ltc3651-charger.o
+obj-$(CONFIG_CHARGER_LT3651)	+= lt3651-charger.o
 obj-$(CONFIG_CHARGER_MAX14577)	+= max14577_charger.o
 obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o
 obj-$(CONFIG_CHARGER_MAX77650)	+= max77650-charger.o
@@ -88,3 +89,4 @@ obj-$(CONFIG_AXP288_CHARGER)	+= axp288_charger.o
 obj-$(CONFIG_CHARGER_CROS_USBPD)	+= cros_usbpd-charger.o
 obj-$(CONFIG_CHARGER_SC2731)	+= sc2731_charger.o
 obj-$(CONFIG_FUEL_GAUGE_SC27XX)	+= sc27xx_fuel_gauge.o
+obj-$(CONFIG_CHARGER_UCS1002)	+= ucs1002_power.o
diff --git a/drivers/power/supply/ab8500_bmdata.c b/drivers/power/supply/ab8500_bmdata.c
index 7b2b69916f48..f6a66979cbb5 100644
--- a/drivers/power/supply/ab8500_bmdata.c
+++ b/drivers/power/supply/ab8500_bmdata.c
@@ -508,6 +508,7 @@ int ab8500_bm_of_probe(struct device *dev,
 	btech = of_get_property(battery_node, "stericsson,battery-type", NULL);
 	if (!btech) {
 		dev_warn(dev, "missing property battery-name/type\n");
+		of_node_put(battery_node);
 		return -EINVAL;
 	}
 
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
index f52fe77edb6f..d2b1255ee1cc 100644
--- a/drivers/power/supply/axp20x_usb_power.c
+++ b/drivers/power/supply/axp20x_usb_power.c
@@ -24,6 +24,7 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/iio/consumer.h>
+#include <linux/workqueue.h>
 
 #define DRVNAME "axp20x-usb-power-supply"
 
@@ -36,16 +37,27 @@
 #define AXP20X_VBUS_VHOLD_MASK		GENMASK(5, 3)
 #define AXP20X_VBUS_VHOLD_OFFSET	3
 #define AXP20X_VBUS_CLIMIT_MASK		3
-#define AXP20X_VBUC_CLIMIT_900mA	0
-#define AXP20X_VBUC_CLIMIT_500mA	1
-#define AXP20X_VBUC_CLIMIT_100mA	2
-#define AXP20X_VBUC_CLIMIT_NONE		3
+#define AXP20X_VBUS_CLIMIT_900mA	0
+#define AXP20X_VBUS_CLIMIT_500mA	1
+#define AXP20X_VBUS_CLIMIT_100mA	2
+#define AXP20X_VBUS_CLIMIT_NONE		3
+
+#define AXP813_VBUS_CLIMIT_900mA	0
+#define AXP813_VBUS_CLIMIT_1500mA	1
+#define AXP813_VBUS_CLIMIT_2000mA	2
+#define AXP813_VBUS_CLIMIT_2500mA	3
 
 #define AXP20X_ADC_EN1_VBUS_CURR	BIT(2)
 #define AXP20X_ADC_EN1_VBUS_VOLT	BIT(3)
 
 #define AXP20X_VBUS_MON_VBUS_VALID	BIT(3)
 
+/*
+ * Note do not raise the debounce time, we must report Vusb high within
+ * 100ms otherwise we get Vbus errors in musb.
+ */
+#define DEBOUNCE_TIME			msecs_to_jiffies(50)
+
 struct axp20x_usb_power {
 	struct device_node *np;
 	struct regmap *regmap;
@@ -53,6 +65,8 @@ struct axp20x_usb_power {
 	enum axp20x_variants axp20x_id;
 	struct iio_channel *vbus_v;
 	struct iio_channel *vbus_i;
+	struct delayed_work vbus_detect;
+	unsigned int old_status;
 };
 
 static irqreturn_t axp20x_usb_power_irq(int irq, void *devid)
@@ -64,6 +78,89 @@ static irqreturn_t axp20x_usb_power_irq(int irq, void *devid)
 	return IRQ_HANDLED;
 }
 
+static void axp20x_usb_power_poll_vbus(struct work_struct *work)
+{
+	struct axp20x_usb_power *power =
+		container_of(work, struct axp20x_usb_power, vbus_detect.work);
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &val);
+	if (ret)
+		goto out;
+
+	val &= (AXP20X_PWR_STATUS_VBUS_PRESENT | AXP20X_PWR_STATUS_VBUS_USED);
+	if (val != power->old_status)
+		power_supply_changed(power->supply);
+
+	power->old_status = val;
+
+out:
+	mod_delayed_work(system_wq, &power->vbus_detect, DEBOUNCE_TIME);
+}
+
+static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power)
+{
+	if (power->axp20x_id >= AXP221_ID)
+		return true;
+
+	return false;
+}
+
+static int axp20x_get_current_max(struct axp20x_usb_power *power, int *val)
+{
+	unsigned int v;
+	int ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
+
+	if (ret)
+		return ret;
+
+	switch (v & AXP20X_VBUS_CLIMIT_MASK) {
+	case AXP20X_VBUS_CLIMIT_100mA:
+		if (power->axp20x_id == AXP221_ID)
+			*val = -1; /* No 100mA limit */
+		else
+			*val = 100000;
+		break;
+	case AXP20X_VBUS_CLIMIT_500mA:
+		*val = 500000;
+		break;
+	case AXP20X_VBUS_CLIMIT_900mA:
+		*val = 900000;
+		break;
+	case AXP20X_VBUS_CLIMIT_NONE:
+		*val = -1;
+		break;
+	}
+
+	return 0;
+}
+
+static int axp813_get_current_max(struct axp20x_usb_power *power, int *val)
+{
+	unsigned int v;
+	int ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
+
+	if (ret)
+		return ret;
+
+	switch (v & AXP20X_VBUS_CLIMIT_MASK) {
+	case AXP813_VBUS_CLIMIT_900mA:
+		*val = 900000;
+		break;
+	case AXP813_VBUS_CLIMIT_1500mA:
+		*val = 1500000;
+		break;
+	case AXP813_VBUS_CLIMIT_2000mA:
+		*val = 2000000;
+		break;
+	case AXP813_VBUS_CLIMIT_2500mA:
+		*val = 2500000;
+		break;
+	}
+	return 0;
+}
+
 static int axp20x_usb_power_get_property(struct power_supply *psy,
 	enum power_supply_property psp, union power_supply_propval *val)
 {
@@ -102,28 +199,9 @@ static int axp20x_usb_power_get_property(struct power_supply *psy,
 		val->intval = ret * 1700; /* 1 step = 1.7 mV */
 		return 0;
 	case POWER_SUPPLY_PROP_CURRENT_MAX:
-		ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
-		if (ret)
-			return ret;
-
-		switch (v & AXP20X_VBUS_CLIMIT_MASK) {
-		case AXP20X_VBUC_CLIMIT_100mA:
-			if (power->axp20x_id == AXP221_ID)
-				val->intval = -1; /* No 100mA limit */
-			else
-				val->intval = 100000;
-			break;
-		case AXP20X_VBUC_CLIMIT_500mA:
-			val->intval = 500000;
-			break;
-		case AXP20X_VBUC_CLIMIT_900mA:
-			val->intval = 900000;
-			break;
-		case AXP20X_VBUC_CLIMIT_NONE:
-			val->intval = -1;
-			break;
-		}
-		return 0;
+		if (power->axp20x_id == AXP813_ID)
+			return axp813_get_current_max(power, &val->intval);
+		return axp20x_get_current_max(power, &val->intval);
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
 		if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
 			ret = iio_read_channel_processed(power->vbus_i,
@@ -214,6 +292,31 @@ static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
 	return -EINVAL;
 }
 
+static int axp813_usb_power_set_current_max(struct axp20x_usb_power *power,
+					    int intval)
+{
+	int val;
+
+	switch (intval) {
+	case 900000:
+		return regmap_update_bits(power->regmap,
+					  AXP20X_VBUS_IPSOUT_MGMT,
+					  AXP20X_VBUS_CLIMIT_MASK,
+					  AXP813_VBUS_CLIMIT_900mA);
+	case 1500000:
+	case 2000000:
+	case 2500000:
+		val = (intval - 1000000) / 500000;
+		return regmap_update_bits(power->regmap,
+					  AXP20X_VBUS_IPSOUT_MGMT,
+					  AXP20X_VBUS_CLIMIT_MASK, val);
+	default:
+		return -EINVAL;
+	}
+
+	return -EINVAL;
+}
+
 static int axp20x_usb_power_set_current_max(struct axp20x_usb_power *power,
 					    int intval)
 {
@@ -248,6 +351,9 @@ static int axp20x_usb_power_set_property(struct power_supply *psy,
 		return axp20x_usb_power_set_voltage_min(power, val->intval);
 
 	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		if (power->axp20x_id == AXP813_ID)
+			return axp813_usb_power_set_current_max(power,
+								val->intval);
 		return axp20x_usb_power_set_current_max(power, val->intval);
 
 	default:
@@ -357,6 +463,7 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
 	if (!power)
 		return -ENOMEM;
 
+	platform_set_drvdata(pdev, power);
 	power->axp20x_id = (enum axp20x_variants)of_device_get_match_data(
 								&pdev->dev);
 
@@ -382,7 +489,8 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
 		usb_power_desc = &axp20x_usb_power_desc;
 		irq_names = axp20x_irq_names;
 	} else if (power->axp20x_id == AXP221_ID ||
-		   power->axp20x_id == AXP223_ID) {
+		   power->axp20x_id == AXP223_ID ||
+		   power->axp20x_id == AXP813_ID) {
 		usb_power_desc = &axp22x_usb_power_desc;
 		irq_names = axp22x_irq_names;
 	} else {
@@ -415,6 +523,19 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
 				 irq_names[i], ret);
 	}
 
+	INIT_DELAYED_WORK(&power->vbus_detect, axp20x_usb_power_poll_vbus);
+	if (axp20x_usb_vbus_needs_polling(power))
+		queue_delayed_work(system_wq, &power->vbus_detect, 0);
+
+	return 0;
+}
+
+static int axp20x_usb_power_remove(struct platform_device *pdev)
+{
+	struct axp20x_usb_power *power = platform_get_drvdata(pdev);
+
+	cancel_delayed_work_sync(&power->vbus_detect);
+
 	return 0;
 }
 
@@ -428,12 +549,16 @@ static const struct of_device_id axp20x_usb_power_match[] = {
 	}, {
 		.compatible = "x-powers,axp223-usb-power-supply",
 		.data = (void *)AXP223_ID,
+	}, {
+		.compatible = "x-powers,axp813-usb-power-supply",
+		.data = (void *)AXP813_ID,
 	}, { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, axp20x_usb_power_match);
 
 static struct platform_driver axp20x_usb_power_driver = {
 	.probe = axp20x_usb_power_probe,
+	.remove = axp20x_usb_power_remove,
 	.driver = {
 		.name = DRVNAME,
 		.of_match_table = axp20x_usb_power_match,
diff --git a/drivers/power/supply/axp288_charger.c b/drivers/power/supply/axp288_charger.c
index f8c6da9277b3..00b961890a38 100644
--- a/drivers/power/supply/axp288_charger.c
+++ b/drivers/power/supply/axp288_charger.c
@@ -833,6 +833,10 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	/* Register charger interrupts */
 	for (i = 0; i < CHRG_INTR_END; i++) {
 		pirq = platform_get_irq(info->pdev, i);
+		if (pirq < 0) {
+			dev_err(&pdev->dev, "Failed to get IRQ: %d\n", pirq);
+			return pirq;
+		}
 		info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
 		if (info->irq[i] < 0) {
 			dev_warn(&info->pdev->dev,
diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c
index 9ff2461820d8..368281bc0d2b 100644
--- a/drivers/power/supply/axp288_fuel_gauge.c
+++ b/drivers/power/supply/axp288_fuel_gauge.c
@@ -686,6 +686,26 @@ intr_failed:
  */
 static const struct dmi_system_id axp288_fuel_gauge_blacklist[] = {
 	{
+		/* ACEPC T8 Cherry Trail Z8350 mini PC */
+		.matches = {
+			DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T8"),
+			/* also match on somewhat unique bios-version */
+			DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"),
+		},
+	},
+	{
+		/* ACEPC T11 Cherry Trail Z8350 mini PC */
+		.matches = {
+			DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T11"),
+			/* also match on somewhat unique bios-version */
+			DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"),
+		},
+	},
+	{
 		/* Intel Cherry Trail Compute Stick, Windows version */
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 29b3a4056865..195c18c2f426 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -1612,7 +1612,8 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
 			di->charge_design_full = bq27xxx_battery_read_dcap(di);
 	}
 
-	if (di->cache.capacity != cache.capacity)
+	if ((di->cache.capacity != cache.capacity) ||
+	    (di->cache.flags != cache.flags))
 		power_supply_changed(di->bat);
 
 	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index 2e8db5e6de0b..a6900aa0d2ed 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -1987,6 +1987,9 @@ static struct platform_driver charger_manager_driver = {
 static int __init charger_manager_init(void)
 {
 	cm_wq = create_freezable_workqueue("charger_manager");
+	if (unlikely(!cm_wq))
+		return -ENOMEM;
+
 	INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller);
 
 	return platform_driver_register(&charger_manager_driver);
diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c
index 6887870ba32c..61d6447d1966 100644
--- a/drivers/power/supply/cpcap-battery.c
+++ b/drivers/power/supply/cpcap-battery.c
@@ -82,9 +82,9 @@ struct cpcap_battery_config {
 };
 
 struct cpcap_coulomb_counter_data {
-	s32 sample;		/* 24-bits */
+	s32 sample;		/* 24 or 32 bits */
 	s32 accumulator;
-	s16 offset;		/* 10-bits */
+	s16 offset;		/* 9 bits */
 };
 
 enum cpcap_battery_state {
@@ -213,7 +213,7 @@ static int cpcap_battery_get_current(struct cpcap_battery_ddata *ddata)
  * TI or ST coulomb counter in the PMIC.
  */
 static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
-				    u32 sample, s32 accumulator,
+				    s32 sample, s32 accumulator,
 				    s16 offset, u32 divider)
 {
 	s64 acc;
@@ -224,9 +224,6 @@ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
 	if (!divider)
 		return 0;
 
-	sample &= 0xffffff;		/* 24-bits, unsigned */
-	offset &= 0x7ff;		/* 10-bits, signed */
-
 	switch (ddata->vendor) {
 	case CPCAP_VENDOR_ST:
 		cc_lsb = 95374;		/* μAms per LSB */
@@ -259,7 +256,7 @@ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
 
 /* 3600000μAms = 1μAh */
 static int cpcap_battery_cc_to_uah(struct cpcap_battery_ddata *ddata,
-				   u32 sample, s32 accumulator,
+				   s32 sample, s32 accumulator,
 				   s16 offset)
 {
 	return cpcap_battery_cc_raw_div(ddata, sample,
@@ -268,7 +265,7 @@ static int cpcap_battery_cc_to_uah(struct cpcap_battery_ddata *ddata,
 }
 
 static int cpcap_battery_cc_to_ua(struct cpcap_battery_ddata *ddata,
-				  u32 sample, s32 accumulator,
+				  s32 sample, s32 accumulator,
 				  s16 offset)
 {
 	return cpcap_battery_cc_raw_div(ddata, sample,
@@ -312,17 +309,19 @@ cpcap_battery_read_accumulated(struct cpcap_battery_ddata *ddata,
 	/* Sample value CPCAP_REG_CCS1 & 2 */
 	ccd->sample = (buf[1] & 0x0fff) << 16;
 	ccd->sample |= buf[0];
+	if (ddata->vendor == CPCAP_VENDOR_TI)
+		ccd->sample = sign_extend32(24, ccd->sample);
 
 	/* Accumulator value CPCAP_REG_CCA1 & 2 */
 	ccd->accumulator = ((s16)buf[3]) << 16;
 	ccd->accumulator |= buf[2];
 
-	/* Offset value CPCAP_REG_CCO */
-	ccd->offset = buf[5];
-
-	/* Adjust offset based on mode value CPCAP_REG_CCM? */
-	if (buf[4] >= 0x200)
-		ccd->offset |= 0xfc00;
+	/*
+	 * Coulomb counter calibration offset is CPCAP_REG_CCM,
+	 * REG_CCO seems unused
+	 */
+	ccd->offset = buf[4];
+	ccd->offset = sign_extend32(ccd->offset, 9);
 
 	return cpcap_battery_cc_to_uah(ddata,
 				       ccd->sample,
@@ -477,11 +476,11 @@ static int cpcap_battery_get_property(struct power_supply *psy,
 		val->intval = ddata->config.info.voltage_min_design;
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_AVG:
-		if (cached) {
+		sample = latest->cc.sample - previous->cc.sample;
+		if (!sample) {
 			val->intval = cpcap_battery_cc_get_avg_current(ddata);
 			break;
 		}
-		sample = latest->cc.sample - previous->cc.sample;
 		accumulator = latest->cc.accumulator - previous->cc.accumulator;
 		val->intval = cpcap_battery_cc_to_ua(ddata, sample,
 						     accumulator,
@@ -498,13 +497,13 @@ static int cpcap_battery_get_property(struct power_supply *psy,
 		val->intval = div64_s64(tmp, 100);
 		break;
 	case POWER_SUPPLY_PROP_POWER_AVG:
-		if (cached) {
+		sample = latest->cc.sample - previous->cc.sample;
+		if (!sample) {
 			tmp = cpcap_battery_cc_get_avg_current(ddata);
 			tmp *= (latest->voltage / 10000);
 			val->intval = div64_s64(tmp, 100);
 			break;
 		}
-		sample = latest->cc.sample - previous->cc.sample;
 		accumulator = latest->cc.accumulator - previous->cc.accumulator;
 		tmp = cpcap_battery_cc_to_ua(ddata, sample, accumulator,
 					     latest->cc.offset);
@@ -562,11 +561,11 @@ static irqreturn_t cpcap_battery_irq_thread(int irq, void *data)
 
 	switch (d->action) {
 	case CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW:
-		if (latest->counter_uah >= 0)
+		if (latest->current_ua >= 0)
 			dev_warn(ddata->dev, "Battery low at 3.3V!\n");
 		break;
 	case CPCAP_BATTERY_IRQ_ACTION_POWEROFF:
-		if (latest->counter_uah >= 0) {
+		if (latest->current_ua >= 0) {
 			dev_emerg(ddata->dev,
 				  "Battery empty at 3.1V, powering off\n");
 			orderly_poweroff(true);
@@ -670,8 +669,9 @@ static int cpcap_battery_init_iio(struct cpcap_battery_ddata *ddata)
 	return 0;
 
 out_err:
-	dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
-		error);
+	if (error != -EPROBE_DEFER)
+		dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
+			error);
 
 	return error;
 }
diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c
index c3ed7b476676..b4781b5d1e10 100644
--- a/drivers/power/supply/cpcap-charger.c
+++ b/drivers/power/supply/cpcap-charger.c
@@ -574,8 +574,9 @@ static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
 	return 0;
 
 out_err:
-	dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
-		error);
+	if (error != -EPROBE_DEFER)
+		dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
+			error);
 
 	return error;
 }
diff --git a/drivers/power/supply/gpio-charger.c b/drivers/power/supply/gpio-charger.c
index 7e4f11d5a230..f99e8f1eef23 100644
--- a/drivers/power/supply/gpio-charger.c
+++ b/drivers/power/supply/gpio-charger.c
@@ -29,11 +29,13 @@
 
 struct gpio_charger {
 	unsigned int irq;
+	unsigned int charge_status_irq;
 	bool wakeup_enabled;
 
 	struct power_supply *charger;
 	struct power_supply_desc charger_desc;
 	struct gpio_desc *gpiod;
+	struct gpio_desc *charge_status;
 };
 
 static irqreturn_t gpio_charger_irq(int irq, void *devid)
@@ -59,6 +61,12 @@ static int gpio_charger_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_ONLINE:
 		val->intval = gpiod_get_value_cansleep(gpio_charger->gpiod);
 		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		if (gpiod_get_value_cansleep(gpio_charger->charge_status))
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -93,8 +101,29 @@ static enum power_supply_type gpio_charger_get_type(struct device *dev)
 	return POWER_SUPPLY_TYPE_UNKNOWN;
 }
 
+static int gpio_charger_get_irq(struct device *dev, void *dev_id,
+				struct gpio_desc *gpio)
+{
+	int ret, irq = gpiod_to_irq(gpio);
+
+	if (irq > 0) {
+		ret = devm_request_any_context_irq(dev, irq, gpio_charger_irq,
+						   IRQF_TRIGGER_RISING |
+						   IRQF_TRIGGER_FALLING,
+						   dev_name(dev),
+						   dev_id);
+		if (ret < 0) {
+			dev_warn(dev, "Failed to request irq: %d\n", ret);
+			irq = 0;
+		}
+	}
+
+	return irq;
+}
+
 static enum power_supply_property gpio_charger_properties[] = {
 	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_STATUS /* Must always be last in the array. */
 };
 
 static int gpio_charger_probe(struct platform_device *pdev)
@@ -104,8 +133,10 @@ static int gpio_charger_probe(struct platform_device *pdev)
 	struct power_supply_config psy_cfg = {};
 	struct gpio_charger *gpio_charger;
 	struct power_supply_desc *charger_desc;
+	struct gpio_desc *charge_status;
+	int charge_status_irq;
 	unsigned long flags;
-	int irq, ret;
+	int ret;
 
 	if (!pdata && !dev->of_node) {
 		dev_err(dev, "No platform data\n");
@@ -151,9 +182,17 @@ static int gpio_charger_probe(struct platform_device *pdev)
 		return PTR_ERR(gpio_charger->gpiod);
 	}
 
+	charge_status = devm_gpiod_get_optional(dev, "charge-status", GPIOD_IN);
+	gpio_charger->charge_status = charge_status;
+	if (IS_ERR(gpio_charger->charge_status))
+		return PTR_ERR(gpio_charger->charge_status);
+
 	charger_desc = &gpio_charger->charger_desc;
 	charger_desc->properties = gpio_charger_properties;
 	charger_desc->num_properties = ARRAY_SIZE(gpio_charger_properties);
+	/* Remove POWER_SUPPLY_PROP_STATUS from the supported properties. */
+	if (!gpio_charger->charge_status)
+		charger_desc->num_properties -= 1;
 	charger_desc->get_property = gpio_charger_get_property;
 
 	psy_cfg.of_node = dev->of_node;
@@ -180,16 +219,12 @@ static int gpio_charger_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	irq = gpiod_to_irq(gpio_charger->gpiod);
-	if (irq > 0) {
-		ret = devm_request_any_context_irq(dev, irq, gpio_charger_irq,
-				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-				dev_name(dev), gpio_charger->charger);
-		if (ret < 0)
-			dev_warn(dev, "Failed to request irq: %d\n", ret);
-		else
-			gpio_charger->irq = irq;
-	}
+	gpio_charger->irq = gpio_charger_get_irq(dev, gpio_charger->charger,
+						 gpio_charger->gpiod);
+
+	charge_status_irq = gpio_charger_get_irq(dev, gpio_charger->charger,
+						 gpio_charger->charge_status);
+	gpio_charger->charge_status_irq = charge_status_irq;
 
 	platform_set_drvdata(pdev, gpio_charger);
 
diff --git a/drivers/power/supply/ingenic-battery.c b/drivers/power/supply/ingenic-battery.c
new file mode 100644
index 000000000000..35816d4b3012
--- /dev/null
+++ b/drivers/power/supply/ingenic-battery.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Battery driver for the Ingenic JZ47xx SoCs
+ * Copyright (c) 2019 Artur Rojek <contact@artur-rojek.eu>
+ *
+ * based on drivers/power/supply/jz4740-battery.c
+ */
+
+#include <linux/iio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/property.h>
+
+struct ingenic_battery {
+	struct device *dev;
+	struct iio_channel *channel;
+	struct power_supply_desc desc;
+	struct power_supply *battery;
+	struct power_supply_battery_info info;
+};
+
+static int ingenic_battery_get_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					union power_supply_propval *val)
+{
+	struct ingenic_battery *bat = power_supply_get_drvdata(psy);
+	struct power_supply_battery_info *info = &bat->info;
+	int ret;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_HEALTH:
+		ret = iio_read_channel_processed(bat->channel, &val->intval);
+		val->intval *= 1000;
+		if (val->intval < info->voltage_min_design_uv)
+			val->intval = POWER_SUPPLY_HEALTH_DEAD;
+		else if (val->intval > info->voltage_max_design_uv)
+			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		else
+			val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		return ret;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = iio_read_channel_processed(bat->channel, &val->intval);
+		val->intval *= 1000;
+		return ret;
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+		val->intval = info->voltage_min_design_uv;
+		return 0;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+		val->intval = info->voltage_max_design_uv;
+		return 0;
+	default:
+		return -EINVAL;
+	};
+}
+
+/* Set the most appropriate IIO channel voltage reference scale
+ * based on the battery's max voltage.
+ */
+static int ingenic_battery_set_scale(struct ingenic_battery *bat)
+{
+	const int *scale_raw;
+	int scale_len, scale_type, best_idx = -1, best_mV, max_raw, i, ret;
+	u64 max_mV;
+
+	ret = iio_read_max_channel_raw(bat->channel, &max_raw);
+	if (ret) {
+		dev_err(bat->dev, "Unable to read max raw channel value\n");
+		return ret;
+	}
+
+	ret = iio_read_avail_channel_attribute(bat->channel, &scale_raw,
+					       &scale_type, &scale_len,
+					       IIO_CHAN_INFO_SCALE);
+	if (ret < 0) {
+		dev_err(bat->dev, "Unable to read channel avail scale\n");
+		return ret;
+	}
+	if (ret != IIO_AVAIL_LIST || scale_type != IIO_VAL_FRACTIONAL_LOG2)
+		return -EINVAL;
+
+	max_mV = bat->info.voltage_max_design_uv / 1000;
+
+	for (i = 0; i < scale_len; i += 2) {
+		u64 scale_mV = (max_raw * scale_raw[i]) >> scale_raw[i + 1];
+
+		if (scale_mV < max_mV)
+			continue;
+
+		if (best_idx >= 0 && scale_mV > best_mV)
+			continue;
+
+		best_mV = scale_mV;
+		best_idx = i;
+	}
+
+	if (best_idx < 0) {
+		dev_err(bat->dev, "Unable to find matching voltage scale\n");
+		return -EINVAL;
+	}
+
+	return iio_write_channel_attribute(bat->channel,
+					   scale_raw[best_idx],
+					   scale_raw[best_idx + 1],
+					   IIO_CHAN_INFO_SCALE);
+}
+
+static enum power_supply_property ingenic_battery_properties[] = {
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+};
+
+static int ingenic_battery_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ingenic_battery *bat;
+	struct power_supply_config psy_cfg = {};
+	struct power_supply_desc *desc;
+	int ret;
+
+	bat = devm_kzalloc(dev, sizeof(*bat), GFP_KERNEL);
+	if (!bat)
+		return -ENOMEM;
+
+	bat->dev = dev;
+	bat->channel = devm_iio_channel_get(dev, "battery");
+	if (IS_ERR(bat->channel))
+		return PTR_ERR(bat->channel);
+
+	desc = &bat->desc;
+	desc->name = "jz-battery";
+	desc->type = POWER_SUPPLY_TYPE_BATTERY;
+	desc->properties = ingenic_battery_properties;
+	desc->num_properties = ARRAY_SIZE(ingenic_battery_properties);
+	desc->get_property = ingenic_battery_get_property;
+	psy_cfg.drv_data = bat;
+	psy_cfg.of_node = dev->of_node;
+
+	bat->battery = devm_power_supply_register(dev, desc, &psy_cfg);
+	if (IS_ERR(bat->battery)) {
+		dev_err(dev, "Unable to register battery\n");
+		return PTR_ERR(bat->battery);
+	}
+
+	ret = power_supply_get_battery_info(bat->battery, &bat->info);
+	if (ret) {
+		dev_err(dev, "Unable to get battery info: %d\n", ret);
+		return ret;
+	}
+	if (bat->info.voltage_min_design_uv < 0) {
+		dev_err(dev, "Unable to get voltage min design\n");
+		return bat->info.voltage_min_design_uv;
+	}
+	if (bat->info.voltage_max_design_uv < 0) {
+		dev_err(dev, "Unable to get voltage max design\n");
+		return bat->info.voltage_max_design_uv;
+	}
+
+	return ingenic_battery_set_scale(bat);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id ingenic_battery_of_match[] = {
+	{ .compatible = "ingenic,jz4740-battery", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ingenic_battery_of_match);
+#endif
+
+static struct platform_driver ingenic_battery_driver = {
+	.driver = {
+		.name = "ingenic-battery",
+		.of_match_table = of_match_ptr(ingenic_battery_of_match),
+	},
+	.probe = ingenic_battery_probe,
+};
+module_platform_driver(ingenic_battery_driver);
+
+MODULE_DESCRIPTION("Battery driver for Ingenic JZ47xx SoCs");
+MODULE_AUTHOR("Artur Rojek <contact@artur-rojek.eu>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/supply/ltc3651-charger.c b/drivers/power/supply/lt3651-charger.c
index eea63ff211c4..8de500ffad95 100644
--- a/drivers/power/supply/ltc3651-charger.c
+++ b/drivers/power/supply/lt3651-charger.c
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
+ *  Driver for Analog Devices (Linear Technology) LT3651 charger IC.
  *  Copyright (C) 2017, Topic Embedded Products
- *  Driver for LTC3651 charger IC.
- *
- *  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/device.h>
@@ -19,7 +15,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 
-struct ltc3651_charger {
+struct lt3651_charger {
 	struct power_supply *charger;
 	struct power_supply_desc charger_desc;
 	struct gpio_desc *acpr_gpio;
@@ -27,7 +23,7 @@ struct ltc3651_charger {
 	struct gpio_desc *chrg_gpio;
 };
 
-static irqreturn_t ltc3651_charger_irq(int irq, void *devid)
+static irqreturn_t lt3651_charger_irq(int irq, void *devid)
 {
 	struct power_supply *charger = devid;
 
@@ -36,37 +32,37 @@ static irqreturn_t ltc3651_charger_irq(int irq, void *devid)
 	return IRQ_HANDLED;
 }
 
-static inline struct ltc3651_charger *psy_to_ltc3651_charger(
+static inline struct lt3651_charger *psy_to_lt3651_charger(
 	struct power_supply *psy)
 {
 	return power_supply_get_drvdata(psy);
 }
 
-static int ltc3651_charger_get_property(struct power_supply *psy,
+static int lt3651_charger_get_property(struct power_supply *psy,
 		enum power_supply_property psp, union power_supply_propval *val)
 {
-	struct ltc3651_charger *ltc3651_charger = psy_to_ltc3651_charger(psy);
+	struct lt3651_charger *lt3651_charger = psy_to_lt3651_charger(psy);
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
-		if (!ltc3651_charger->chrg_gpio) {
+		if (!lt3651_charger->chrg_gpio) {
 			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 			break;
 		}
-		if (gpiod_get_value(ltc3651_charger->chrg_gpio))
+		if (gpiod_get_value(lt3651_charger->chrg_gpio))
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
 		else
 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 		break;
 	case POWER_SUPPLY_PROP_ONLINE:
-		val->intval = gpiod_get_value(ltc3651_charger->acpr_gpio);
+		val->intval = gpiod_get_value(lt3651_charger->acpr_gpio);
 		break;
 	case POWER_SUPPLY_PROP_HEALTH:
-		if (!ltc3651_charger->fault_gpio) {
+		if (!lt3651_charger->fault_gpio) {
 			val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
 			break;
 		}
-		if (!gpiod_get_value(ltc3651_charger->fault_gpio)) {
+		if (!gpiod_get_value(lt3651_charger->fault_gpio)) {
 			val->intval = POWER_SUPPLY_HEALTH_GOOD;
 			break;
 		}
@@ -74,11 +70,11 @@ static int ltc3651_charger_get_property(struct power_supply *psy,
 		 * If the fault pin is active, the chrg pin explains the type
 		 * of failure.
 		 */
-		if (!ltc3651_charger->chrg_gpio) {
+		if (!lt3651_charger->chrg_gpio) {
 			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 			break;
 		}
-		val->intval = gpiod_get_value(ltc3651_charger->chrg_gpio) ?
+		val->intval = gpiod_get_value(lt3651_charger->chrg_gpio) ?
 				POWER_SUPPLY_HEALTH_OVERHEAT :
 				POWER_SUPPLY_HEALTH_DEAD;
 		break;
@@ -89,59 +85,59 @@ static int ltc3651_charger_get_property(struct power_supply *psy,
 	return 0;
 }
 
-static enum power_supply_property ltc3651_charger_properties[] = {
+static enum power_supply_property lt3651_charger_properties[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_ONLINE,
 	POWER_SUPPLY_PROP_HEALTH,
 };
 
-static int ltc3651_charger_probe(struct platform_device *pdev)
+static int lt3651_charger_probe(struct platform_device *pdev)
 {
 	struct power_supply_config psy_cfg = {};
-	struct ltc3651_charger *ltc3651_charger;
+	struct lt3651_charger *lt3651_charger;
 	struct power_supply_desc *charger_desc;
 	int ret;
 
-	ltc3651_charger = devm_kzalloc(&pdev->dev, sizeof(*ltc3651_charger),
+	lt3651_charger = devm_kzalloc(&pdev->dev, sizeof(*lt3651_charger),
 					GFP_KERNEL);
-	if (!ltc3651_charger)
+	if (!lt3651_charger)
 		return -ENOMEM;
 
-	ltc3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,
+	lt3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,
 					"lltc,acpr", GPIOD_IN);
-	if (IS_ERR(ltc3651_charger->acpr_gpio)) {
-		ret = PTR_ERR(ltc3651_charger->acpr_gpio);
+	if (IS_ERR(lt3651_charger->acpr_gpio)) {
+		ret = PTR_ERR(lt3651_charger->acpr_gpio);
 		dev_err(&pdev->dev, "Failed to acquire acpr GPIO: %d\n", ret);
 		return ret;
 	}
-	ltc3651_charger->fault_gpio = devm_gpiod_get_optional(&pdev->dev,
+	lt3651_charger->fault_gpio = devm_gpiod_get_optional(&pdev->dev,
 					"lltc,fault", GPIOD_IN);
-	if (IS_ERR(ltc3651_charger->fault_gpio)) {
-		ret = PTR_ERR(ltc3651_charger->fault_gpio);
+	if (IS_ERR(lt3651_charger->fault_gpio)) {
+		ret = PTR_ERR(lt3651_charger->fault_gpio);
 		dev_err(&pdev->dev, "Failed to acquire fault GPIO: %d\n", ret);
 		return ret;
 	}
-	ltc3651_charger->chrg_gpio = devm_gpiod_get_optional(&pdev->dev,
+	lt3651_charger->chrg_gpio = devm_gpiod_get_optional(&pdev->dev,
 					"lltc,chrg", GPIOD_IN);
-	if (IS_ERR(ltc3651_charger->chrg_gpio)) {
-		ret = PTR_ERR(ltc3651_charger->chrg_gpio);
+	if (IS_ERR(lt3651_charger->chrg_gpio)) {
+		ret = PTR_ERR(lt3651_charger->chrg_gpio);
 		dev_err(&pdev->dev, "Failed to acquire chrg GPIO: %d\n", ret);
 		return ret;
 	}
 
-	charger_desc = &ltc3651_charger->charger_desc;
+	charger_desc = &lt3651_charger->charger_desc;
 	charger_desc->name = pdev->dev.of_node->name;
 	charger_desc->type = POWER_SUPPLY_TYPE_MAINS;
-	charger_desc->properties = ltc3651_charger_properties;
-	charger_desc->num_properties = ARRAY_SIZE(ltc3651_charger_properties);
-	charger_desc->get_property = ltc3651_charger_get_property;
+	charger_desc->properties = lt3651_charger_properties;
+	charger_desc->num_properties = ARRAY_SIZE(lt3651_charger_properties);
+	charger_desc->get_property = lt3651_charger_get_property;
 	psy_cfg.of_node = pdev->dev.of_node;
-	psy_cfg.drv_data = ltc3651_charger;
+	psy_cfg.drv_data = lt3651_charger;
 
-	ltc3651_charger->charger = devm_power_supply_register(&pdev->dev,
+	lt3651_charger->charger = devm_power_supply_register(&pdev->dev,
 						      charger_desc, &psy_cfg);
-	if (IS_ERR(ltc3651_charger->charger)) {
-		ret = PTR_ERR(ltc3651_charger->charger);
+	if (IS_ERR(lt3651_charger->charger)) {
+		ret = PTR_ERR(lt3651_charger->charger);
 		dev_err(&pdev->dev, "Failed to register power supply: %d\n",
 			ret);
 		return ret;
@@ -152,59 +148,60 @@ static int ltc3651_charger_probe(struct platform_device *pdev)
 	 * support IRQs on these pins, userspace will have to poll the sysfs
 	 * files manually.
 	 */
-	if (ltc3651_charger->acpr_gpio) {
-		ret = gpiod_to_irq(ltc3651_charger->acpr_gpio);
+	if (lt3651_charger->acpr_gpio) {
+		ret = gpiod_to_irq(lt3651_charger->acpr_gpio);
 		if (ret >= 0)
 			ret = devm_request_any_context_irq(&pdev->dev, ret,
-				ltc3651_charger_irq,
+				lt3651_charger_irq,
 				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-				dev_name(&pdev->dev), ltc3651_charger->charger);
+				dev_name(&pdev->dev), lt3651_charger->charger);
 		if (ret < 0)
 			dev_warn(&pdev->dev, "Failed to request acpr irq\n");
 	}
-	if (ltc3651_charger->fault_gpio) {
-		ret = gpiod_to_irq(ltc3651_charger->fault_gpio);
+	if (lt3651_charger->fault_gpio) {
+		ret = gpiod_to_irq(lt3651_charger->fault_gpio);
 		if (ret >= 0)
 			ret = devm_request_any_context_irq(&pdev->dev, ret,
-				ltc3651_charger_irq,
+				lt3651_charger_irq,
 				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-				dev_name(&pdev->dev), ltc3651_charger->charger);
+				dev_name(&pdev->dev), lt3651_charger->charger);
 		if (ret < 0)
 			dev_warn(&pdev->dev, "Failed to request fault irq\n");
 	}
-	if (ltc3651_charger->chrg_gpio) {
-		ret = gpiod_to_irq(ltc3651_charger->chrg_gpio);
+	if (lt3651_charger->chrg_gpio) {
+		ret = gpiod_to_irq(lt3651_charger->chrg_gpio);
 		if (ret >= 0)
 			ret = devm_request_any_context_irq(&pdev->dev, ret,
-				ltc3651_charger_irq,
+				lt3651_charger_irq,
 				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-				dev_name(&pdev->dev), ltc3651_charger->charger);
+				dev_name(&pdev->dev), lt3651_charger->charger);
 		if (ret < 0)
 			dev_warn(&pdev->dev, "Failed to request chrg irq\n");
 	}
 
-	platform_set_drvdata(pdev, ltc3651_charger);
+	platform_set_drvdata(pdev, lt3651_charger);
 
 	return 0;
 }
 
-static const struct of_device_id ltc3651_charger_match[] = {
-	{ .compatible = "lltc,ltc3651-charger" },
+static const struct of_device_id lt3651_charger_match[] = {
+	{ .compatible = "lltc,ltc3651-charger" }, /* DEPRECATED */
+	{ .compatible = "lltc,lt3651-charger" },
 	{ }
 };
-MODULE_DEVICE_TABLE(of, ltc3651_charger_match);
+MODULE_DEVICE_TABLE(of, lt3651_charger_match);
 
-static struct platform_driver ltc3651_charger_driver = {
-	.probe = ltc3651_charger_probe,
+static struct platform_driver lt3651_charger_driver = {
+	.probe = lt3651_charger_probe,
 	.driver = {
-		.name = "ltc3651-charger",
-		.of_match_table = ltc3651_charger_match,
+		.name = "lt3651-charger",
+		.of_match_table = lt3651_charger_match,
 	},
 };
 
-module_platform_driver(ltc3651_charger_driver);
+module_platform_driver(lt3651_charger_driver);
 
 MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>");
-MODULE_DESCRIPTION("Driver for LTC3651 charger");
+MODULE_DESCRIPTION("Driver for LT3651 charger");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ltc3651-charger");
+MODULE_ALIAS("platform:lt3651-charger");
diff --git a/drivers/power/supply/max14656_charger_detector.c b/drivers/power/supply/max14656_charger_detector.c
index b91b1d2999dc..9e6472834e37 100644
--- a/drivers/power/supply/max14656_charger_detector.c
+++ b/drivers/power/supply/max14656_charger_detector.c
@@ -240,6 +240,14 @@ static enum power_supply_property max14656_battery_props[] = {
 	POWER_SUPPLY_PROP_MANUFACTURER,
 };
 
+static void stop_irq_work(void *data)
+{
+	struct max14656_chip *chip = data;
+
+	cancel_delayed_work_sync(&chip->irq_work);
+}
+
+
 static int max14656_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
 {
@@ -278,7 +286,19 @@ static int max14656_probe(struct i2c_client *client,
 	if (ret)
 		return -ENODEV;
 
+	chip->detect_psy = devm_power_supply_register(dev,
+		       &chip->psy_desc, &psy_cfg);
+	if (IS_ERR(chip->detect_psy)) {
+		dev_err(dev, "power_supply_register failed\n");
+		return -EINVAL;
+	}
+
 	INIT_DELAYED_WORK(&chip->irq_work, max14656_irq_worker);
+	ret = devm_add_action(dev, stop_irq_work, chip);
+	if (ret) {
+		dev_err(dev, "devm_add_action %d failed\n", ret);
+		return ret;
+	}
 
 	ret = devm_request_irq(dev, chip->irq, max14656_irq,
 			       IRQF_TRIGGER_FALLING,
@@ -289,13 +309,6 @@ static int max14656_probe(struct i2c_client *client,
 	}
 	enable_irq_wake(chip->irq);
 
-	chip->detect_psy = devm_power_supply_register(dev,
-		       &chip->psy_desc, &psy_cfg);
-	if (IS_ERR(chip->detect_psy)) {
-		dev_err(dev, "power_supply_register failed\n");
-		return -EINVAL;
-	}
-
 	schedule_delayed_work(&chip->irq_work, msecs_to_jiffies(2000));
 
 	return 0;
diff --git a/drivers/power/supply/olpc_battery.c b/drivers/power/supply/olpc_battery.c
index 5a97e42a3547..7720e4c2ac0b 100644
--- a/drivers/power/supply/olpc_battery.c
+++ b/drivers/power/supply/olpc_battery.c
@@ -14,6 +14,7 @@
 #include <linux/types.h>
 #include <linux/err.h>
 #include <linux/device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/jiffies.h>
@@ -52,6 +53,14 @@
 
 #define BAT_ADDR_MFR_TYPE	0x5F
 
+struct olpc_battery_data {
+	struct power_supply *olpc_ac;
+	struct power_supply *olpc_bat;
+	char bat_serial[17];
+	bool new_proto;
+	bool little_endian;
+};
+
 /*********************************************************************
  *		Power
  *********************************************************************/
@@ -90,13 +99,10 @@ static const struct power_supply_desc olpc_ac_desc = {
 	.get_property = olpc_ac_get_prop,
 };
 
-static struct power_supply *olpc_ac;
-
-static char bat_serial[17]; /* Ick */
-
-static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte)
+static int olpc_bat_get_status(struct olpc_battery_data *data,
+		union power_supply_propval *val, uint8_t ec_byte)
 {
-	if (olpc_platform_info.ecver > 0x44) {
+	if (data->new_proto) {
 		if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE))
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
 		else if (ec_byte & BAT_STAT_DISCHARGING)
@@ -318,6 +324,14 @@ static int olpc_bat_get_voltage_max_design(union power_supply_propval *val)
 	return ret;
 }
 
+static u16 ecword_to_cpu(struct olpc_battery_data *data, u16 ec_word)
+{
+	if (data->little_endian)
+		return le16_to_cpu((__force __le16)ec_word);
+	else
+		return be16_to_cpu((__force __be16)ec_word);
+}
+
 /*********************************************************************
  *		Battery properties
  *********************************************************************/
@@ -325,8 +339,9 @@ static int olpc_bat_get_property(struct power_supply *psy,
 				 enum power_supply_property psp,
 				 union power_supply_propval *val)
 {
+	struct olpc_battery_data *data = power_supply_get_drvdata(psy);
 	int ret = 0;
-	__be16 ec_word;
+	u16 ec_word;
 	uint8_t ec_byte;
 	__be64 ser_buf;
 
@@ -346,7 +361,7 @@ static int olpc_bat_get_property(struct power_supply *psy,
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
-		ret = olpc_bat_get_status(val, ec_byte);
+		ret = olpc_bat_get_status(data, val, ec_byte);
 		if (ret)
 			return ret;
 		break;
@@ -389,7 +404,7 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		if (ret)
 			return ret;
 
-		val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32;
+		val->intval = ecword_to_cpu(data, ec_word) * 9760L / 32;
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_AVG:
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
@@ -397,7 +412,7 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		if (ret)
 			return ret;
 
-		val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120;
+		val->intval = ecword_to_cpu(data, ec_word) * 15625L / 120;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
 		ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
@@ -428,29 +443,29 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		if (ret)
 			return ret;
 
-		val->intval = (s16)be16_to_cpu(ec_word) * 10 / 256;
+		val->intval = ecword_to_cpu(data, ec_word) * 10 / 256;
 		break;
 	case POWER_SUPPLY_PROP_TEMP_AMBIENT:
 		ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
 		if (ret)
 			return ret;
 
-		val->intval = (int)be16_to_cpu(ec_word) * 10 / 256;
+		val->intval = (int)ecword_to_cpu(data, ec_word) * 10 / 256;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 		ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
 		if (ret)
 			return ret;
 
-		val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15;
+		val->intval = ecword_to_cpu(data, ec_word) * 6250 / 15;
 		break;
 	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
 		ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
 		if (ret)
 			return ret;
 
-		sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
-		val->strval = bat_serial;
+		sprintf(data->bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
+		val->strval = data->bat_serial;
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 		ret = olpc_bat_get_voltage_max_design(val);
@@ -536,7 +551,7 @@ static ssize_t olpc_bat_eeprom_read(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static const struct bin_attribute olpc_bat_eeprom = {
+static struct bin_attribute olpc_bat_eeprom = {
 	.attr = {
 		.name = "eeprom",
 		.mode = S_IRUGO,
@@ -560,7 +575,7 @@ static ssize_t olpc_bat_error_read(struct device *dev,
 	return sprintf(buf, "%d\n", ec_byte);
 }
 
-static const struct device_attribute olpc_bat_error = {
+static struct device_attribute olpc_bat_error = {
 	.attr = {
 		.name = "error",
 		.mode = S_IRUGO,
@@ -568,6 +583,27 @@ static const struct device_attribute olpc_bat_error = {
 	.show = olpc_bat_error_read,
 };
 
+static struct attribute *olpc_bat_sysfs_attrs[] = {
+	&olpc_bat_error.attr,
+	NULL
+};
+
+static struct bin_attribute *olpc_bat_sysfs_bin_attrs[] = {
+	&olpc_bat_eeprom,
+	NULL
+};
+
+static const struct attribute_group olpc_bat_sysfs_group = {
+	.attrs = olpc_bat_sysfs_attrs,
+	.bin_attrs = olpc_bat_sysfs_bin_attrs,
+
+};
+
+static const struct attribute_group *olpc_bat_sysfs_groups[] = {
+	&olpc_bat_sysfs_group,
+	NULL
+};
+
 /*********************************************************************
  *		Initialisation
  *********************************************************************/
@@ -578,17 +614,17 @@ static struct power_supply_desc olpc_bat_desc = {
 	.use_for_apm = 1,
 };
 
-static struct power_supply *olpc_bat;
-
 static int olpc_battery_suspend(struct platform_device *pdev,
 				pm_message_t state)
 {
-	if (device_may_wakeup(&olpc_ac->dev))
+	struct olpc_battery_data *data = platform_get_drvdata(pdev);
+
+	if (device_may_wakeup(&data->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))
+	if (device_may_wakeup(&data->olpc_bat->dev))
 		olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
 				   | EC_SCI_SRC_BATERR);
 	else
@@ -600,16 +636,37 @@ static int olpc_battery_suspend(struct platform_device *pdev,
 
 static int olpc_battery_probe(struct platform_device *pdev)
 {
-	int ret;
+	struct power_supply_config bat_psy_cfg = {};
+	struct power_supply_config ac_psy_cfg = {};
+	struct olpc_battery_data *data;
 	uint8_t status;
+	uint8_t ecver;
+	int ret;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, data);
 
-	/*
-	 * We've seen a number of EC protocol changes; this driver requires
-	 * the latest EC protocol, supported by 0x44 and above.
-	 */
-	if (olpc_platform_info.ecver < 0x44) {
+	/* See if the EC is already there and get the EC revision */
+	ret = olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0, &ecver, 1);
+	if (ret)
+		return ret;
+
+	if (of_find_compatible_node(NULL, NULL, "olpc,xo1.75-ec")) {
+		/* XO 1.75 */
+		data->new_proto = true;
+		data->little_endian = true;
+	} else if (ecver > 0x44) {
+		/* XO 1 or 1.5 with a new EC firmware. */
+		data->new_proto = true;
+	} else if (ecver < 0x44) {
+		/*
+		 * We've seen a number of EC protocol changes; this driver
+		 * requires the latest EC protocol, supported by 0x44 and above.
+		 */
 		printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
-			"battery driver.\n", olpc_platform_info.ecver);
+			"battery driver.\n", ecver);
 		return -ENXIO;
 	}
 
@@ -619,59 +676,44 @@ static int olpc_battery_probe(struct platform_device *pdev)
 
 	/* Ignore the status. It doesn't actually matter */
 
-	olpc_ac = power_supply_register(&pdev->dev, &olpc_ac_desc, NULL);
-	if (IS_ERR(olpc_ac))
-		return PTR_ERR(olpc_ac);
+	ac_psy_cfg.of_node = pdev->dev.of_node;
+	ac_psy_cfg.drv_data = data;
+
+	data->olpc_ac = devm_power_supply_register(&pdev->dev, &olpc_ac_desc,
+								&ac_psy_cfg);
+	if (IS_ERR(data->olpc_ac))
+		return PTR_ERR(data->olpc_ac);
 
-	if (olpc_board_at_least(olpc_board_pre(0xd0))) { /* XO-1.5 */
+	if (of_device_is_compatible(pdev->dev.of_node, "olpc,xo1.5-battery")) {
+		/* XO-1.5 */
 		olpc_bat_desc.properties = olpc_xo15_bat_props;
 		olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo15_bat_props);
-	} else { /* XO-1 */
+	} else {
+		/* XO-1 */
 		olpc_bat_desc.properties = olpc_xo1_bat_props;
 		olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
 	}
 
-	olpc_bat = power_supply_register(&pdev->dev, &olpc_bat_desc, NULL);
-	if (IS_ERR(olpc_bat)) {
-		ret = PTR_ERR(olpc_bat);
-		goto battery_failed;
-	}
-
-	ret = device_create_bin_file(&olpc_bat->dev, &olpc_bat_eeprom);
-	if (ret)
-		goto eeprom_failed;
+	bat_psy_cfg.of_node = pdev->dev.of_node;
+	bat_psy_cfg.drv_data = data;
+	bat_psy_cfg.attr_grp = olpc_bat_sysfs_groups;
 
-	ret = device_create_file(&olpc_bat->dev, &olpc_bat_error);
-	if (ret)
-		goto error_failed;
+	data->olpc_bat = devm_power_supply_register(&pdev->dev, &olpc_bat_desc,
+								&bat_psy_cfg);
+	if (IS_ERR(data->olpc_bat))
+		return PTR_ERR(data->olpc_bat);
 
 	if (olpc_ec_wakeup_available()) {
-		device_set_wakeup_capable(&olpc_ac->dev, true);
-		device_set_wakeup_capable(&olpc_bat->dev, true);
+		device_set_wakeup_capable(&data->olpc_ac->dev, true);
+		device_set_wakeup_capable(&data->olpc_bat->dev, true);
 	}
 
 	return 0;
-
-error_failed:
-	device_remove_bin_file(&olpc_bat->dev, &olpc_bat_eeprom);
-eeprom_failed:
-	power_supply_unregister(olpc_bat);
-battery_failed:
-	power_supply_unregister(olpc_ac);
-	return ret;
-}
-
-static int 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);
-	return 0;
 }
 
 static const struct of_device_id olpc_battery_ids[] = {
 	{ .compatible = "olpc,xo1-battery" },
+	{ .compatible = "olpc,xo1.5-battery" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, olpc_battery_ids);
@@ -682,7 +724,6 @@ static struct platform_driver olpc_battery_driver = {
 		.of_match_table = olpc_battery_ids,
 	},
 	.probe = olpc_battery_probe,
-	.remove = olpc_battery_remove,
 	.suspend = olpc_battery_suspend,
 };
 
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index c917a8b43b2b..f7033ecf6d0b 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -598,10 +598,12 @@ int power_supply_get_battery_info(struct power_supply *psy,
 
 	err = of_property_read_string(battery_np, "compatible", &value);
 	if (err)
-		return err;
+		goto out_put_node;
 
-	if (strcmp("simple-battery", value))
-		return -ENODEV;
+	if (strcmp("simple-battery", value)) {
+		err = -ENODEV;
+		goto out_put_node;
+	}
 
 	/* The property and field names below must correspond to elements
 	 * in enum power_supply_property. For reasoning, see
@@ -620,19 +622,21 @@ int power_supply_get_battery_info(struct power_supply *psy,
 			     &info->precharge_current_ua);
 	of_property_read_u32(battery_np, "charge-term-current-microamp",
 			     &info->charge_term_current_ua);
-	of_property_read_u32(battery_np, "constant_charge_current_max_microamp",
+	of_property_read_u32(battery_np, "constant-charge-current-max-microamp",
 			     &info->constant_charge_current_max_ua);
-	of_property_read_u32(battery_np, "constant_charge_voltage_max_microvolt",
+	of_property_read_u32(battery_np, "constant-charge-voltage-max-microvolt",
 			     &info->constant_charge_voltage_max_uv);
 	of_property_read_u32(battery_np, "factory-internal-resistance-micro-ohms",
 			     &info->factory_internal_resistance_uohm);
 
 	len = of_property_count_u32_elems(battery_np, "ocv-capacity-celsius");
 	if (len < 0 && len != -EINVAL) {
-		return len;
+		err = len;
+		goto out_put_node;
 	} else if (len > POWER_SUPPLY_OCV_TEMP_MAX) {
 		dev_err(&psy->dev, "Too many temperature values\n");
-		return -EINVAL;
+		err = -EINVAL;
+		goto out_put_node;
 	} else if (len > 0) {
 		of_property_read_u32_array(battery_np, "ocv-capacity-celsius",
 					   info->ocv_temp, len);
@@ -650,7 +654,8 @@ int power_supply_get_battery_info(struct power_supply *psy,
 			dev_err(&psy->dev, "failed to get %s\n", propname);
 			kfree(propname);
 			power_supply_put_battery_info(psy, info);
-			return -EINVAL;
+			err = -EINVAL;
+			goto out_put_node;
 		}
 
 		kfree(propname);
@@ -661,16 +666,21 @@ int power_supply_get_battery_info(struct power_supply *psy,
 			devm_kcalloc(&psy->dev, tab_len, sizeof(*table), GFP_KERNEL);
 		if (!info->ocv_table[index]) {
 			power_supply_put_battery_info(psy, info);
-			return -ENOMEM;
+			err = -ENOMEM;
+			goto out_put_node;
 		}
 
 		for (i = 0; i < tab_len; i++) {
-			table[i].ocv = be32_to_cpu(*list++);
-			table[i].capacity = be32_to_cpu(*list++);
+			table[i].ocv = be32_to_cpu(*list);
+			list++;
+			table[i].capacity = be32_to_cpu(*list);
+			list++;
 		}
 	}
 
-	return 0;
+out_put_node:
+	of_node_put(battery_np);
+	return err;
 }
 EXPORT_SYMBOL_GPL(power_supply_get_battery_info);
 
@@ -899,7 +909,7 @@ static int ps_get_max_charge_cntl_limit(struct thermal_cooling_device *tcd,
 	return ret;
 }
 
-static int ps_get_cur_chrage_cntl_limit(struct thermal_cooling_device *tcd,
+static int ps_get_cur_charge_cntl_limit(struct thermal_cooling_device *tcd,
 					unsigned long *state)
 {
 	struct power_supply *psy;
@@ -934,7 +944,7 @@ static int ps_set_cur_charge_cntl_limit(struct thermal_cooling_device *tcd,
 
 static const struct thermal_cooling_device_ops psy_tcd_ops = {
 	.get_max_state = ps_get_max_charge_cntl_limit,
-	.get_cur_state = ps_get_cur_chrage_cntl_limit,
+	.get_cur_state = ps_get_cur_charge_cntl_limit,
 	.set_cur_state = ps_set_cur_charge_cntl_limit,
 };
 
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index 5358a80d854f..a704a76d7529 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -56,13 +56,13 @@ static const char * const power_supply_status_text[] = {
 };
 
 static const char * const power_supply_charge_type_text[] = {
-	"Unknown", "N/A", "Trickle", "Fast"
+	"Unknown", "N/A", "Trickle", "Fast", "Standard", "Adaptive", "Custom"
 };
 
 static const char * const power_supply_health_text[] = {
 	"Unknown", "Good", "Overheat", "Dead", "Over voltage",
 	"Unspecified failure", "Cold", "Watchdog timer expire",
-	"Safety timer expire"
+	"Safety timer expire", "Over current"
 };
 
 static const char * const power_supply_technology_text[] = {
@@ -274,6 +274,8 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(constant_charge_voltage_max),
 	POWER_SUPPLY_ATTR(charge_control_limit),
 	POWER_SUPPLY_ATTR(charge_control_limit_max),
+	POWER_SUPPLY_ATTR(charge_control_start_threshold),
+	POWER_SUPPLY_ATTR(charge_control_end_threshold),
 	POWER_SUPPLY_ATTR(input_current_limit),
 	POWER_SUPPLY_ATTR(energy_full_design),
 	POWER_SUPPLY_ATTR(energy_empty_design),
diff --git a/drivers/power/supply/ucs1002_power.c b/drivers/power/supply/ucs1002_power.c
new file mode 100644
index 000000000000..1c89d030c045
--- /dev/null
+++ b/drivers/power/supply/ucs1002_power.c
@@ -0,0 +1,646 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for UCS1002 Programmable USB Port Power Controller
+ *
+ * Copyright (C) 2019 Zodiac Inflight Innovations
+ */
+#include <linux/bits.h>
+#include <linux/freezer.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+/* UCS1002 Registers */
+#define UCS1002_REG_CURRENT_MEASUREMENT	0x00
+
+/*
+ * The Total Accumulated Charge registers store the total accumulated
+ * charge delivered from the VS source to a portable device. The total
+ * value is calculated using four registers, from 01h to 04h. The bit
+ * weighting of the registers is given in mA/hrs.
+ */
+#define UCS1002_REG_TOTAL_ACC_CHARGE	0x01
+
+/* Other Status Register */
+#define UCS1002_REG_OTHER_STATUS	0x0f
+#  define F_ADET_PIN			BIT(4)
+#  define F_CHG_ACT			BIT(3)
+
+/* Interrupt Status */
+#define UCS1002_REG_INTERRUPT_STATUS	0x10
+#  define F_DISCHARGE_ERR		BIT(6)
+#  define F_RESET			BIT(5)
+#  define F_MIN_KEEP_OUT		BIT(4)
+#  define F_TSD				BIT(3)
+#  define F_OVER_VOLT			BIT(2)
+#  define F_BACK_VOLT			BIT(1)
+#  define F_OVER_ILIM			BIT(0)
+
+/* Pin Status Register */
+#define UCS1002_REG_PIN_STATUS		0x14
+#  define UCS1002_PWR_STATE_MASK	0x03
+#  define F_PWR_EN_PIN			BIT(6)
+#  define F_M2_PIN			BIT(5)
+#  define F_M1_PIN			BIT(4)
+#  define F_EM_EN_PIN			BIT(3)
+#  define F_SEL_PIN			BIT(2)
+#  define F_ACTIVE_MODE_MASK		GENMASK(5, 3)
+#  define F_ACTIVE_MODE_PASSTHROUGH	F_M2_PIN
+#  define F_ACTIVE_MODE_DEDICATED	F_EM_EN_PIN
+#  define F_ACTIVE_MODE_BC12_DCP	(F_M2_PIN | F_EM_EN_PIN)
+#  define F_ACTIVE_MODE_BC12_SDP	F_M1_PIN
+#  define F_ACTIVE_MODE_BC12_CDP	(F_M1_PIN | F_M2_PIN | F_EM_EN_PIN)
+
+/* General Configuration Register */
+#define UCS1002_REG_GENERAL_CFG		0x15
+#  define F_RATION_EN			BIT(3)
+
+/* Emulation Configuration Register */
+#define UCS1002_REG_EMU_CFG		0x16
+
+/* Switch Configuration Register */
+#define UCS1002_REG_SWITCH_CFG		0x17
+#  define F_PIN_IGNORE			BIT(7)
+#  define F_EM_EN_SET			BIT(5)
+#  define F_M2_SET			BIT(4)
+#  define F_M1_SET			BIT(3)
+#  define F_S0_SET			BIT(2)
+#  define F_PWR_EN_SET			BIT(1)
+#  define F_LATCH_SET			BIT(0)
+#  define V_SET_ACTIVE_MODE_MASK	GENMASK(5, 3)
+#  define V_SET_ACTIVE_MODE_PASSTHROUGH	F_M2_SET
+#  define V_SET_ACTIVE_MODE_DEDICATED	F_EM_EN_SET
+#  define V_SET_ACTIVE_MODE_BC12_DCP	(F_M2_SET | F_EM_EN_SET)
+#  define V_SET_ACTIVE_MODE_BC12_SDP	F_M1_SET
+#  define V_SET_ACTIVE_MODE_BC12_CDP	(F_M1_SET | F_M2_SET | F_EM_EN_SET)
+
+/* Current Limit Register */
+#define UCS1002_REG_ILIMIT		0x19
+#  define UCS1002_ILIM_SW_MASK		GENMASK(3, 0)
+
+/* Product ID */
+#define UCS1002_REG_PRODUCT_ID		0xfd
+#  define UCS1002_PRODUCT_ID		0x4e
+
+/* Manufacture name */
+#define UCS1002_MANUFACTURER		"SMSC"
+
+struct ucs1002_info {
+	struct power_supply *charger;
+	struct i2c_client *client;
+	struct regmap *regmap;
+	struct regulator_desc *regulator_descriptor;
+	bool present;
+};
+
+static enum power_supply_property ucs1002_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CURRENT_MAX,
+	POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */
+	POWER_SUPPLY_PROP_MANUFACTURER,
+	POWER_SUPPLY_PROP_USB_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+};
+
+static int ucs1002_get_online(struct ucs1002_info *info,
+			      union power_supply_propval *val)
+{
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, &reg);
+	if (ret)
+		return ret;
+
+	val->intval = !!(reg & F_CHG_ACT);
+
+	return 0;
+}
+
+static int ucs1002_get_charge(struct ucs1002_info *info,
+			      union power_supply_propval *val)
+{
+	/*
+	 * To fit within 32 bits some values are rounded (uA/h)
+	 *
+	 * For Total Accumulated Charge Middle Low Byte register, addr
+	 * 03h, byte 2
+	 *
+	 *   B0: 0.01084 mA/h rounded to 11 uA/h
+	 *   B1: 0.02169 mA/h rounded to 22 uA/h
+	 *   B2: 0.04340 mA/h rounded to 43 uA/h
+	 *   B3: 0.08676 mA/h rounded to 87 uA/h
+	 *   B4: 0.17350 mA/h rounded to 173 uÁ/h
+	 *
+	 * For Total Accumulated Charge Low Byte register, addr 04h,
+	 * byte 3
+	 *
+	 *   B6: 0.00271 mA/h rounded to 3 uA/h
+	 *   B7: 0.005422 mA/h rounded to 5 uA/h
+	 */
+	static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = {
+		/*
+		 * Bit corresponding to low byte (offset 0x04)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		0, 0, 0, 0, 0, 0, 3, 5,
+		/*
+		 * Bit corresponding to middle low byte (offset 0x03)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		11, 22, 43, 87, 173, 347, 694, 1388,
+		/*
+		 * Bit corresponding to middle high byte (offset 0x02)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400,
+		/*
+		 * Bit corresponding to high byte (offset 0x01)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		710700, 1421000, 2843000, 5685000, 11371000, 22742000,
+		45484000, 90968000,
+	};
+	unsigned long total_acc_charger;
+	unsigned int reg;
+	int i, ret;
+
+	ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE,
+			       &reg, sizeof(u32));
+	if (ret)
+		return ret;
+
+	total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */
+	val->intval = 0;
+
+	for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh))
+		val->intval += bit_weights_uAh[i];
+
+	return 0;
+}
+
+static int ucs1002_get_current(struct ucs1002_info *info,
+			       union power_supply_propval *val)
+{
+	/*
+	 * The Current Measurement register stores the measured
+	 * current value delivered to the portable device. The range
+	 * is from 9.76 mA to 2.5 A.
+	 */
+	static const int bit_weights_uA[BITS_PER_TYPE(u8)] = {
+		9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300,
+	};
+	unsigned long current_measurement;
+	unsigned int reg;
+	int i, ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, &reg);
+	if (ret)
+		return ret;
+
+	current_measurement = reg;
+	val->intval = 0;
+
+	for_each_set_bit(i, &current_measurement, ARRAY_SIZE(bit_weights_uA))
+		val->intval += bit_weights_uA[i];
+
+	return 0;
+}
+
+/*
+ * The Current Limit register stores the maximum current used by the
+ * port switch. The range is from 500mA to 2.5 A.
+ */
+static const u32 ucs1002_current_limit_uA[] = {
+	500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000,
+};
+
+static int ucs1002_get_max_current(struct ucs1002_info *info,
+				   union power_supply_propval *val)
+{
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, &reg);
+	if (ret)
+		return ret;
+
+	val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK];
+
+	return 0;
+}
+
+static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val)
+{
+	unsigned int reg;
+	int ret, idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) {
+		if (val == ucs1002_current_limit_uA[idx])
+			break;
+	}
+
+	if (idx == ARRAY_SIZE(ucs1002_current_limit_uA))
+		return -EINVAL;
+
+	ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx);
+	if (ret)
+		return ret;
+	/*
+	 * Any current limit setting exceeding the one set via ILIM
+	 * pin will be rejected, so we read out freshly changed limit
+	 * to make sure that it took effect.
+	 */
+	ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, &reg);
+	if (ret)
+		return ret;
+
+	if (reg != idx)
+		return -EINVAL;
+
+	return 0;
+}
+
+static enum power_supply_usb_type ucs1002_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_PD,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+};
+
+static int ucs1002_set_usb_type(struct ucs1002_info *info, int val)
+{
+	unsigned int mode;
+
+	if (val < 0 || val >= ARRAY_SIZE(ucs1002_usb_types))
+		return -EINVAL;
+
+	switch (ucs1002_usb_types[val]) {
+	case POWER_SUPPLY_USB_TYPE_PD:
+		mode = V_SET_ACTIVE_MODE_DEDICATED;
+		break;
+	case POWER_SUPPLY_USB_TYPE_SDP:
+		mode = V_SET_ACTIVE_MODE_BC12_SDP;
+		break;
+	case POWER_SUPPLY_USB_TYPE_DCP:
+		mode = V_SET_ACTIVE_MODE_BC12_DCP;
+		break;
+	case POWER_SUPPLY_USB_TYPE_CDP:
+		mode = V_SET_ACTIVE_MODE_BC12_CDP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
+				  V_SET_ACTIVE_MODE_MASK, mode);
+}
+
+static int ucs1002_get_usb_type(struct ucs1002_info *info,
+				union power_supply_propval *val)
+{
+	enum power_supply_usb_type type;
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, &reg);
+	if (ret)
+		return ret;
+
+	switch (reg & F_ACTIVE_MODE_MASK) {
+	default:
+		type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		break;
+	case F_ACTIVE_MODE_DEDICATED:
+		type = POWER_SUPPLY_USB_TYPE_PD;
+		break;
+	case F_ACTIVE_MODE_BC12_SDP:
+		type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case F_ACTIVE_MODE_BC12_DCP:
+		type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case F_ACTIVE_MODE_BC12_CDP:
+		type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	};
+
+	val->intval = type;
+
+	return 0;
+}
+
+static int ucs1002_get_health(struct ucs1002_info *info,
+			      union power_supply_propval *val)
+{
+	unsigned int reg;
+	int ret, health;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, &reg);
+	if (ret)
+		return ret;
+
+	if (reg & F_TSD)
+		health = POWER_SUPPLY_HEALTH_OVERHEAT;
+	else if (reg & (F_OVER_VOLT | F_BACK_VOLT))
+		health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+	else if (reg & F_OVER_ILIM)
+		health = POWER_SUPPLY_HEALTH_OVERCURRENT;
+	else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT))
+		health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+	else
+		health = POWER_SUPPLY_HEALTH_GOOD;
+
+	val->intval = health;
+
+	return 0;
+}
+
+static int ucs1002_get_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct ucs1002_info *info = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		return ucs1002_get_online(info, val);
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		return ucs1002_get_charge(info, val);
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		return ucs1002_get_current(info, val);
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		return ucs1002_get_max_current(info, val);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return ucs1002_get_usb_type(info, val);
+	case POWER_SUPPLY_PROP_HEALTH:
+		return ucs1002_get_health(info, val);
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = info->present;
+		return 0;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = UCS1002_MANUFACTURER;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ucs1002_set_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				const union power_supply_propval *val)
+{
+	struct ucs1002_info *info = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		return ucs1002_set_max_current(info, val->intval);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return ucs1002_set_usb_type(info, val->intval);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ucs1002_property_is_writeable(struct power_supply *psy,
+					 enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct power_supply_desc ucs1002_charger_desc = {
+	.name			= "ucs1002",
+	.type			= POWER_SUPPLY_TYPE_USB,
+	.usb_types		= ucs1002_usb_types,
+	.num_usb_types		= ARRAY_SIZE(ucs1002_usb_types),
+	.get_property		= ucs1002_get_property,
+	.set_property		= ucs1002_set_property,
+	.property_is_writeable	= ucs1002_property_is_writeable,
+	.properties		= ucs1002_props,
+	.num_properties		= ARRAY_SIZE(ucs1002_props),
+};
+
+static irqreturn_t ucs1002_charger_irq(int irq, void *data)
+{
+	int ret, regval;
+	bool present;
+	struct ucs1002_info *info = data;
+
+	present = info->present;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, &regval);
+	if (ret)
+		return IRQ_HANDLED;
+
+	/* update attached status */
+	info->present = regval & F_ADET_PIN;
+
+	/* notify the change */
+	if (present != info->present)
+		power_supply_changed(info->charger);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ucs1002_alert_irq(int irq, void *data)
+{
+	struct ucs1002_info *info = data;
+
+	power_supply_changed(info->charger);
+
+	return IRQ_HANDLED;
+}
+
+static const struct regulator_ops ucs1002_regulator_ops = {
+	.is_enabled	= regulator_is_enabled_regmap,
+	.enable		= regulator_enable_regmap,
+	.disable	= regulator_disable_regmap,
+};
+
+static const struct regulator_desc ucs1002_regulator_descriptor = {
+	.name		= "ucs1002-vbus",
+	.ops		= &ucs1002_regulator_ops,
+	.type		= REGULATOR_VOLTAGE,
+	.owner		= THIS_MODULE,
+	.enable_reg	= UCS1002_REG_SWITCH_CFG,
+	.enable_mask	= F_PWR_EN_SET,
+	.enable_val	= F_PWR_EN_SET,
+	.fixed_uV	= 5000000,
+	.n_voltages	= 1,
+};
+
+static int ucs1002_probe(struct i2c_client *client,
+			 const struct i2c_device_id *dev_id)
+{
+	struct device *dev = &client->dev;
+	struct power_supply_config charger_config = {};
+	const struct regmap_config regmap_config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+	};
+	struct regulator_config regulator_config = {};
+	int irq_a_det, irq_alert, ret;
+	struct regulator_dev *rdev;
+	struct ucs1002_info *info;
+	unsigned int regval;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->regmap = devm_regmap_init_i2c(client, &regmap_config);
+	ret = PTR_ERR_OR_ZERO(info->regmap);
+	if (ret) {
+		dev_err(dev, "Regmap initialization failed: %d\n", ret);
+		return ret;
+	}
+
+	info->client = client;
+
+	irq_a_det = of_irq_get_byname(dev->of_node, "a_det");
+	irq_alert = of_irq_get_byname(dev->of_node, "alert");
+
+	charger_config.of_node = dev->of_node;
+	charger_config.drv_data = info;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, &regval);
+	if (ret) {
+		dev_err(dev, "Failed to read product ID: %d\n", ret);
+		return ret;
+	}
+
+	if (regval != UCS1002_PRODUCT_ID) {
+		dev_err(dev,
+			"Product ID does not match (0x%02x != 0x%02x)\n",
+			regval, UCS1002_PRODUCT_ID);
+		return -ENODEV;
+	}
+
+	/* Enable charge rationing by default */
+	ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG,
+				 F_RATION_EN, F_RATION_EN);
+	if (ret) {
+		dev_err(dev, "Failed to read general config: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active
+	 * mode selection to BC1.2 CDP.
+	 */
+	ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
+				 V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE,
+				 V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE);
+	if (ret) {
+		dev_err(dev, "Failed to configure default mode: %d\n", ret);
+		return ret;
+	}
+	/*
+	 * Be safe and set initial current limit to 500mA
+	 */
+	ret = ucs1002_set_max_current(info, 500000);
+	if (ret) {
+		dev_err(dev, "Failed to set max current default: %d\n", ret);
+		return ret;
+	}
+
+	info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc,
+						   &charger_config);
+	ret = PTR_ERR_OR_ZERO(info->charger);
+	if (ret) {
+		dev_err(dev, "Failed to register power supply: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, &regval);
+	if (ret) {
+		dev_err(dev, "Failed to read pin status: %d\n", ret);
+		return ret;
+	}
+
+	info->regulator_descriptor =
+		devm_kmemdup(dev, &ucs1002_regulator_descriptor,
+			     sizeof(ucs1002_regulator_descriptor),
+			     GFP_KERNEL);
+	if (!info->regulator_descriptor)
+		return -ENOMEM;
+
+	info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN);
+
+	regulator_config.dev = dev;
+	regulator_config.of_node = dev->of_node;
+	regulator_config.regmap = info->regmap;
+
+	rdev = devm_regulator_register(dev, info->regulator_descriptor,
+				       &regulator_config);
+	ret = PTR_ERR_OR_ZERO(rdev);
+	if (ret) {
+		dev_err(dev, "Failed to register VBUS regulator: %d\n", ret);
+		return ret;
+	}
+
+	if (irq_a_det > 0) {
+		ret = devm_request_threaded_irq(dev, irq_a_det, NULL,
+						ucs1002_charger_irq,
+						IRQF_ONESHOT,
+						"ucs1002-a_det", info);
+		if (ret) {
+			dev_err(dev, "Failed to request A_DET threaded irq: %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	if (irq_alert > 0) {
+		ret = devm_request_threaded_irq(dev, irq_alert, NULL,
+						ucs1002_alert_irq,
+						IRQF_ONESHOT,
+						"ucs1002-alert", info);
+		if (ret) {
+			dev_err(dev, "Failed to request ALERT threaded irq: %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct of_device_id ucs1002_of_match[] = {
+	{ .compatible = "microchip,ucs1002", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ucs1002_of_match);
+
+static struct i2c_driver ucs1002_driver = {
+	.driver = {
+		   .name = "ucs1002",
+		   .of_match_table = ucs1002_of_match,
+	},
+	.probe = ucs1002_probe,
+};
+module_i2c_driver(ucs1002_driver);
+
+MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller");
+MODULE_AUTHOR("Enric Balletbo Serra <enric.balletbo@collabora.com>");
+MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
+MODULE_LICENSE("GPL");