Merge remote-tracking branch 'battery/for-next'

9 files changed, 327 insertions, 44 deletions

diff --git a/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt b/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt
new file mode 100644
index 000000000000..71f2840e8209
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt
@@ -0,0 +1,27 @@
+ltc3651-charger
+
+Required properties:
+ - compatible: "lltc,ltc3651-charger"
+ - lltc,acpr-gpios: Connect to ACPR output. See remark below.
+
+Optional properties:
+ - lltc,fault-gpios: Connect to FAULT output. See remark below.
+ - lltc,chrg-gpios: Connect to CHRG output. See remark below.
+
+The ltc3651 outputs are open-drain type and active low. The driver assumes the
+GPIO reports "active" when the output is asserted, so if the pins have been
+connected directly, the GPIO flags should be set to active low also.
+
+The driver will attempt to aquire interrupts for all GPIOs to detect changes in
+line state. If the system is not capabale of providing interrupts, the driver
+cannot report changes and userspace will need to periodically read the sysfs
+attributes to detect changes.
+
+Example:
+
+	charger: battery-charger {
+		compatible = "lltc,ltc3651-charger";
+		lltc,acpr-gpios = <&gpio0 68 GPIO_ACTIVE_LOW>;
+		lltc,fault-gpios = <&gpio0 64 GPIO_ACTIVE_LOW>;
+		lltc,chrg-gpios = <&gpio0 63 GPIO_ACTIVE_LOW>;
+	};
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 86f40bf37c34..30598aa05e21 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -408,6 +408,13 @@ 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"
+	depends on GPIOLIB
+	help
+	  Say Y to include support for the LTC3651 battery charger which reports
+	  its status via GPIO lines.
+
 config CHARGER_MAX14577
 	tristate "Maxim MAX14577/77836 battery charger driver"
 	depends on MFD_MAX14577
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index a39126d7a6ce..c5e576f0f0ee 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -61,6 +61,7 @@ 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_MAX14577)	+= max14577_charger.o
 obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o
 obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
index 2397c482656e..44f70dcea61e 100644
--- a/drivers/power/supply/axp20x_usb_power.c
+++ b/drivers/power/supply/axp20x_usb_power.c
@@ -339,7 +339,7 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
 		"VBUS_REMOVAL", "VBUS_VALID", "VBUS_NOT_VALID", NULL };
 	static const char * const axp22x_irq_names[] = {
 		"VBUS_PLUGIN", "VBUS_REMOVAL", NULL };
-	static const char * const *irq_names;
+	const char * const *irq_names;
 	const struct power_supply_desc *usb_power_desc;
 	int i, irq, ret;
 
diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c
index 26a2dc7ac9a2..a798af4471d7 100644
--- a/drivers/power/supply/cpcap-charger.c
+++ b/drivers/power/supply/cpcap-charger.c
@@ -38,20 +38,27 @@
 #include <linux/iio/consumer.h>
 #include <linux/mfd/motorola-cpcap.h>
 
-/* CPCAP_REG_CRM register bits */
+/*
+ * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware,
+ * see NXP "MC13783 Power Management and Audio Circuit Users's Guide"
+ * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers
+ * and values for CPCAP are different, but some of the internal components seem
+ * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1
+ * bits that seem to describe the CRM register.
+ */
 #define CPCAP_REG_CRM_UNUSED_641_15	BIT(15)	/* 641 = register number */
 #define CPCAP_REG_CRM_UNUSED_641_14	BIT(14)	/* 641 = register number */
-#define CPCAP_REG_CRM_CHRG_LED_EN	BIT(13)
-#define CPCAP_REG_CRM_RVRSMODE		BIT(12)
-#define CPCAP_REG_CRM_ICHRG_TR1		BIT(11)
+#define CPCAP_REG_CRM_CHRG_LED_EN	BIT(13)	/* Charger LED */
+#define CPCAP_REG_CRM_RVRSMODE		BIT(12)	/* USB VBUS output enable */
+#define CPCAP_REG_CRM_ICHRG_TR1		BIT(11)	/* Trickle charge current */
 #define CPCAP_REG_CRM_ICHRG_TR0		BIT(10)
-#define CPCAP_REG_CRM_FET_OVRD		BIT(9)
-#define CPCAP_REG_CRM_FET_CTRL		BIT(8)
-#define CPCAP_REG_CRM_VCHRG3		BIT(7)
+#define CPCAP_REG_CRM_FET_OVRD		BIT(9)	/* 0 = hardware, 1 = FET_CTRL */
+#define CPCAP_REG_CRM_FET_CTRL		BIT(8)	/* BPFET 1 if FET_OVRD set */
+#define CPCAP_REG_CRM_VCHRG3		BIT(7)	/* Charge voltage bits */
 #define CPCAP_REG_CRM_VCHRG2		BIT(6)
 #define CPCAP_REG_CRM_VCHRG1		BIT(5)
 #define CPCAP_REG_CRM_VCHRG0		BIT(4)
-#define CPCAP_REG_CRM_ICHRG3		BIT(3)
+#define CPCAP_REG_CRM_ICHRG3		BIT(3)	/* Charge current bits */
 #define CPCAP_REG_CRM_ICHRG2		BIT(2)
 #define CPCAP_REG_CRM_ICHRG1		BIT(1)
 #define CPCAP_REG_CRM_ICHRG0		BIT(0)
@@ -63,42 +70,50 @@
 #define CPCAP_REG_CRM_TR_0A48		CPCAP_REG_CRM_TR(0x2)
 #define CPCAP_REG_CRM_TR_0A72		CPCAP_REG_CRM_TR(0x4)
 
-/* CPCAP_REG_CRM charge voltages */
+/*
+ * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values.
+ * Note that these register bits don't match MC13783UG.pdf VCHRG
+ * register bits.
+ */
 #define CPCAP_REG_CRM_VCHRG(val)	(((val) & 0xf) << 4)
 #define CPCAP_REG_CRM_VCHRG_3V80	CPCAP_REG_CRM_VCHRG(0x0)
 #define CPCAP_REG_CRM_VCHRG_4V10	CPCAP_REG_CRM_VCHRG(0x1)
-#define CPCAP_REG_CRM_VCHRG_4V15	CPCAP_REG_CRM_VCHRG(0x2)
-#define CPCAP_REG_CRM_VCHRG_4V20	CPCAP_REG_CRM_VCHRG(0x3)
-#define CPCAP_REG_CRM_VCHRG_4V22	CPCAP_REG_CRM_VCHRG(0x4)
-#define CPCAP_REG_CRM_VCHRG_4V24	CPCAP_REG_CRM_VCHRG(0x5)
-#define CPCAP_REG_CRM_VCHRG_4V26	CPCAP_REG_CRM_VCHRG(0x6)
-#define CPCAP_REG_CRM_VCHRG_4V28	CPCAP_REG_CRM_VCHRG(0x7)
-#define CPCAP_REG_CRM_VCHRG_4V30	CPCAP_REG_CRM_VCHRG(0x8)
-#define CPCAP_REG_CRM_VCHRG_4V32	CPCAP_REG_CRM_VCHRG(0x9)
-#define CPCAP_REG_CRM_VCHRG_4V34	CPCAP_REG_CRM_VCHRG(0xa)
+#define CPCAP_REG_CRM_VCHRG_4V12	CPCAP_REG_CRM_VCHRG(0x2)
+#define CPCAP_REG_CRM_VCHRG_4V15	CPCAP_REG_CRM_VCHRG(0x3)
+#define CPCAP_REG_CRM_VCHRG_4V17	CPCAP_REG_CRM_VCHRG(0x4)
+#define CPCAP_REG_CRM_VCHRG_4V20	CPCAP_REG_CRM_VCHRG(0x5)
+#define CPCAP_REG_CRM_VCHRG_4V23	CPCAP_REG_CRM_VCHRG(0x6)
+#define CPCAP_REG_CRM_VCHRG_4V25	CPCAP_REG_CRM_VCHRG(0x7)
+#define CPCAP_REG_CRM_VCHRG_4V27	CPCAP_REG_CRM_VCHRG(0x8)
+#define CPCAP_REG_CRM_VCHRG_4V30	CPCAP_REG_CRM_VCHRG(0x9)
+#define CPCAP_REG_CRM_VCHRG_4V33	CPCAP_REG_CRM_VCHRG(0xa)
 #define CPCAP_REG_CRM_VCHRG_4V35	CPCAP_REG_CRM_VCHRG(0xb)
 #define CPCAP_REG_CRM_VCHRG_4V38	CPCAP_REG_CRM_VCHRG(0xc)
 #define CPCAP_REG_CRM_VCHRG_4V40	CPCAP_REG_CRM_VCHRG(0xd)
 #define CPCAP_REG_CRM_VCHRG_4V42	CPCAP_REG_CRM_VCHRG(0xe)
 #define CPCAP_REG_CRM_VCHRG_4V44	CPCAP_REG_CRM_VCHRG(0xf)
 
-/* CPCAP_REG_CRM charge currents */
+/*
+ * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf
+ * values in "Table 8-3. Charge Path Regulator Current Limit
+ * Characteristics" for the nominal values.
+ */
 #define CPCAP_REG_CRM_ICHRG(val)	(((val) & 0xf) << 0)
 #define CPCAP_REG_CRM_ICHRG_0A000	CPCAP_REG_CRM_ICHRG(0x0)
 #define CPCAP_REG_CRM_ICHRG_0A070	CPCAP_REG_CRM_ICHRG(0x1)
-#define CPCAP_REG_CRM_ICHRG_0A176	CPCAP_REG_CRM_ICHRG(0x2)
-#define CPCAP_REG_CRM_ICHRG_0A264	CPCAP_REG_CRM_ICHRG(0x3)
-#define CPCAP_REG_CRM_ICHRG_0A352	CPCAP_REG_CRM_ICHRG(0x4)
-#define CPCAP_REG_CRM_ICHRG_0A440	CPCAP_REG_CRM_ICHRG(0x5)
-#define CPCAP_REG_CRM_ICHRG_0A528	CPCAP_REG_CRM_ICHRG(0x6)
-#define CPCAP_REG_CRM_ICHRG_0A616	CPCAP_REG_CRM_ICHRG(0x7)
-#define CPCAP_REG_CRM_ICHRG_0A704	CPCAP_REG_CRM_ICHRG(0x8)
-#define CPCAP_REG_CRM_ICHRG_0A792	CPCAP_REG_CRM_ICHRG(0x9)
-#define CPCAP_REG_CRM_ICHRG_0A880	CPCAP_REG_CRM_ICHRG(0xa)
-#define CPCAP_REG_CRM_ICHRG_0A968	CPCAP_REG_CRM_ICHRG(0xb)
-#define CPCAP_REG_CRM_ICHRG_1A056	CPCAP_REG_CRM_ICHRG(0xc)
-#define CPCAP_REG_CRM_ICHRG_1A144	CPCAP_REG_CRM_ICHRG(0xd)
-#define CPCAP_REG_CRM_ICHRG_1A584	CPCAP_REG_CRM_ICHRG(0xe)
+#define CPCAP_REG_CRM_ICHRG_0A177	CPCAP_REG_CRM_ICHRG(0x2)
+#define CPCAP_REG_CRM_ICHRG_0A266	CPCAP_REG_CRM_ICHRG(0x3)
+#define CPCAP_REG_CRM_ICHRG_0A355	CPCAP_REG_CRM_ICHRG(0x4)
+#define CPCAP_REG_CRM_ICHRG_0A443	CPCAP_REG_CRM_ICHRG(0x5)
+#define CPCAP_REG_CRM_ICHRG_0A532	CPCAP_REG_CRM_ICHRG(0x6)
+#define CPCAP_REG_CRM_ICHRG_0A621	CPCAP_REG_CRM_ICHRG(0x7)
+#define CPCAP_REG_CRM_ICHRG_0A709	CPCAP_REG_CRM_ICHRG(0x8)
+#define CPCAP_REG_CRM_ICHRG_0A798	CPCAP_REG_CRM_ICHRG(0x9)
+#define CPCAP_REG_CRM_ICHRG_0A886	CPCAP_REG_CRM_ICHRG(0xa)
+#define CPCAP_REG_CRM_ICHRG_0A975	CPCAP_REG_CRM_ICHRG(0xb)
+#define CPCAP_REG_CRM_ICHRG_1A064	CPCAP_REG_CRM_ICHRG(0xc)
+#define CPCAP_REG_CRM_ICHRG_1A152	CPCAP_REG_CRM_ICHRG(0xd)
+#define CPCAP_REG_CRM_ICHRG_1A596	CPCAP_REG_CRM_ICHRG(0xe)
 #define CPCAP_REG_CRM_ICHRG_NO_LIMIT	CPCAP_REG_CRM_ICHRG(0xf)
 
 enum {
@@ -428,9 +443,9 @@ static void cpcap_usb_detect(struct work_struct *work)
 		int max_current;
 
 		if (cpcap_charger_battery_found(ddata))
-			max_current = CPCAP_REG_CRM_ICHRG_1A584;
+			max_current = CPCAP_REG_CRM_ICHRG_1A596;
 		else
-			max_current = CPCAP_REG_CRM_ICHRG_0A528;
+			max_current = CPCAP_REG_CRM_ICHRG_0A532;
 
 		error = cpcap_charger_set_state(ddata,
 						CPCAP_REG_CRM_VCHRG_4V35,
diff --git a/drivers/power/supply/ltc3651-charger.c b/drivers/power/supply/ltc3651-charger.c
new file mode 100644
index 000000000000..5f8d5c0b5721
--- /dev/null
+++ b/drivers/power/supply/ltc3651-charger.c
@@ -0,0 +1,210 @@
+/*
+ *  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>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+struct ltc3651_charger {
+	struct power_supply *charger;
+	struct power_supply_desc charger_desc;
+	struct gpio_desc *acpr_gpio;
+	struct gpio_desc *fault_gpio;
+	struct gpio_desc *chrg_gpio;
+};
+
+static irqreturn_t ltc3651_charger_irq(int irq, void *devid)
+{
+	struct power_supply *charger = devid;
+
+	power_supply_changed(charger);
+
+	return IRQ_HANDLED;
+}
+
+static inline struct ltc3651_charger *psy_to_ltc3651_charger(
+	struct power_supply *psy)
+{
+	return power_supply_get_drvdata(psy);
+}
+
+static int ltc3651_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);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		if (!ltc3651_charger->chrg_gpio) {
+			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+			break;
+		}
+		if (gpiod_get_value(ltc3651_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);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		if (!ltc3651_charger->fault_gpio) {
+			val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
+			break;
+		}
+		if (!gpiod_get_value(ltc3651_charger->fault_gpio)) {
+			val->intval = POWER_SUPPLY_HEALTH_GOOD;
+			break;
+		}
+		/*
+		 * If the fault pin is active, the chrg pin explains the type
+		 * of failure.
+		 */
+		if (!ltc3651_charger->chrg_gpio) {
+			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+			break;
+		}
+		val->intval = gpiod_get_value(ltc3651_charger->chrg_gpio) ?
+				POWER_SUPPLY_HEALTH_OVERHEAT :
+				POWER_SUPPLY_HEALTH_DEAD;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static enum power_supply_property ltc3651_charger_properties[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_HEALTH,
+};
+
+static int ltc3651_charger_probe(struct platform_device *pdev)
+{
+	struct power_supply_config psy_cfg = {};
+	struct ltc3651_charger *ltc3651_charger;
+	struct power_supply_desc *charger_desc;
+	int ret;
+
+	ltc3651_charger = devm_kzalloc(&pdev->dev, sizeof(*ltc3651_charger),
+					GFP_KERNEL);
+	if (!ltc3651_charger)
+		return -ENOMEM;
+
+	ltc3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,
+					"lltc,acpr", GPIOD_IN);
+	if (IS_ERR(ltc3651_charger->acpr_gpio)) {
+		ret = PTR_ERR(ltc3651_charger->charger);
+		dev_err(&pdev->dev, "Failed to acquire acpr GPIO: %d\n", ret);
+		return ret;
+	}
+	ltc3651_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->charger);
+		dev_err(&pdev->dev, "Failed to acquire fault GPIO: %d\n", ret);
+		return ret;
+	}
+	ltc3651_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->charger);
+		dev_err(&pdev->dev, "Failed to acquire chrg GPIO: %d\n", ret);
+		return ret;
+	}
+
+	charger_desc = &ltc3651_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;
+	psy_cfg.of_node = pdev->dev.of_node;
+	psy_cfg.drv_data = ltc3651_charger;
+
+	ltc3651_charger->charger = devm_power_supply_register(&pdev->dev,
+						      charger_desc, &psy_cfg);
+	if (IS_ERR(ltc3651_charger->charger)) {
+		ret = PTR_ERR(ltc3651_charger->charger);
+		dev_err(&pdev->dev, "Failed to register power supply: %d\n",
+			ret);
+		return ret;
+	}
+
+	/*
+	 * Acquire IRQs for the GPIO pins if possible. If the system does not
+	 * 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 (ret >= 0)
+			ret = devm_request_any_context_irq(&pdev->dev, ret,
+				ltc3651_charger_irq,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				dev_name(&pdev->dev), ltc3651_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 (ret >= 0)
+			ret = devm_request_any_context_irq(&pdev->dev, ret,
+				ltc3651_charger_irq,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				dev_name(&pdev->dev), ltc3651_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 (ret >= 0)
+			ret = devm_request_any_context_irq(&pdev->dev, ret,
+				ltc3651_charger_irq,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				dev_name(&pdev->dev), ltc3651_charger->charger);
+		if (ret < 0)
+			dev_warn(&pdev->dev, "Failed to request chrg irq\n");
+	}
+
+	platform_set_drvdata(pdev, ltc3651_charger);
+
+	return 0;
+}
+
+static const struct of_device_id ltc3651_charger_match[] = {
+	{ .compatible = "lltc,ltc3651-charger" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ltc3651_charger_match);
+
+static struct platform_driver ltc3651_charger_driver = {
+	.probe = ltc3651_charger_probe,
+	.driver = {
+		.name = "ltc3651-charger",
+		.of_match_table = ltc3651_charger_match,
+	},
+};
+
+module_platform_driver(ltc3651_charger_driver);
+
+MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>");
+MODULE_DESCRIPTION("Driver for LTC3651 charger");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ltc3651-charger");
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 7ec7c7c202bd..0c09144193a6 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -274,8 +274,30 @@ static int power_supply_check_supplies(struct power_supply *psy)
 	return power_supply_populate_supplied_from(psy);
 }
 #else
-static inline int power_supply_check_supplies(struct power_supply *psy)
+static int power_supply_check_supplies(struct power_supply *psy)
 {
+	int nval, ret;
+
+	if (!psy->dev.parent)
+		return 0;
+
+	nval = device_property_read_string_array(psy->dev.parent,
+						 "supplied-from", NULL, 0);
+	if (nval <= 0)
+		return 0;
+
+	psy->supplied_from = devm_kmalloc_array(&psy->dev, nval,
+						sizeof(char *), GFP_KERNEL);
+	if (!psy->supplied_from)
+		return -ENOMEM;
+
+	ret = device_property_read_string_array(psy->dev.parent,
+		"supplied-from", (const char **)psy->supplied_from, nval);
+	if (ret < 0)
+		return ret;
+
+	psy->num_supplies = nval;
+
 	return 0;
 }
 #endif
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index bcde8d13476a..07b484f995c1 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -46,7 +46,7 @@ static ssize_t power_supply_show_property(struct device *dev,
 	static char *type_text[] = {
 		"Unknown", "Battery", "UPS", "Mains", "USB",
 		"USB_DCP", "USB_CDP", "USB_ACA", "USB_C",
-		"USB_PD", "USB_PD_DRP"
+		"USB_PD", "USB_PD_DRP", "BrickID"
 	};
 	static char *status_text[] = {
 		"Unknown", "Charging", "Discharging", "Not charging", "Full"
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 3965503315ef..4bd34051995e 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -159,13 +159,14 @@ enum power_supply_type {
 	POWER_SUPPLY_TYPE_BATTERY,
 	POWER_SUPPLY_TYPE_UPS,
 	POWER_SUPPLY_TYPE_MAINS,
-	POWER_SUPPLY_TYPE_USB,		/* Standard Downstream Port */
-	POWER_SUPPLY_TYPE_USB_DCP,	/* Dedicated Charging Port */
-	POWER_SUPPLY_TYPE_USB_CDP,	/* Charging Downstream Port */
-	POWER_SUPPLY_TYPE_USB_ACA,	/* Accessory Charger Adapters */
-	POWER_SUPPLY_TYPE_USB_TYPE_C,	/* Type C Port */
-	POWER_SUPPLY_TYPE_USB_PD,	/* Power Delivery Port */
-	POWER_SUPPLY_TYPE_USB_PD_DRP,	/* PD Dual Role Port */
+	POWER_SUPPLY_TYPE_USB,			/* Standard Downstream Port */
+	POWER_SUPPLY_TYPE_USB_DCP,		/* Dedicated Charging Port */
+	POWER_SUPPLY_TYPE_USB_CDP,		/* Charging Downstream Port */
+	POWER_SUPPLY_TYPE_USB_ACA,		/* Accessory Charger Adapters */
+	POWER_SUPPLY_TYPE_USB_TYPE_C,		/* Type C Port */
+	POWER_SUPPLY_TYPE_USB_PD,		/* Power Delivery Port */
+	POWER_SUPPLY_TYPE_USB_PD_DRP,		/* PD Dual Role Port */
+	POWER_SUPPLY_TYPE_APPLE_BRICK_ID,	/* Apple Charging Method */
 };
 
 enum power_supply_notifier_events {