Merge tag 'for-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:

- New core support:
- battery internal resistance
- battery OCV capacity lookup table
- support for custom sysfs attributes

- Convert all drivers to use power-supply core support for custom sysfs
attributes

- bq24190-charger: bq24196 support

- axp20x-charger: AXP813 support

- sc27xx-battery: new fuel gauge driver

- gpio-poweroff: support for specific active and inactive delays

- Misc fixes

* tag 'for-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (53 commits)
power: supply: bq25890: fix BAT_COMP field definition
power: supply: gpio-charger: Do not use deprecated POWER_SUPPLY_TYPE_USB_*
power: supply: ds2781: switch to devm_power_supply_register
power: supply: ds2780: switch to devm_power_supply_register
power: supply: ds2781: fix race-condition in bin attribute registration
power: supply: ds2780: fix race-condition in bin attribute registration
power: supply: pcf50633: fix race-condition in sysfs registration
power: supply: charger-manager: fix race-condition in sysfs registration
power: supply: charger-manager: simplify generation of sysfs attribute group name
power: supply: bq24257: fix race-condition in sysfs registration
power: supply: bq24190_charger: fix race-condition in sysfs registration
power: supply: lp8788: fix race-condition in sysfs registration
power: supply: ds2781: fix race-condition in sysfs registration
power: supply: ds2780: fix race-condition in sysfs registration
power: supply: bq2415x: fix race-condition in sysfs registration
power: supply: core: add support for custom sysfs attributes
power: supply: sc27xx: Save last battery capacity
power: reset: at91-poweroff: move shdwc related data to one structure
power: supply: sc27xx: Add suspend/resume interfaces
power: supply: sc27xx: Add fuel gauge low voltage alarm
...

Documentation/devicetree/bindings/power/reset/gpio-poweroff.txt

···
   it to an output when the power-off handler is called. If this optional
   property is not specified, the GPIO is initialized as an output in its
   inactive state.
+- active-delay-ms: Delay (default 100) to wait after driving gpio active
+- inactive-delay-ms: Delay (default 100) to wait after driving gpio inactive
 - timeout-ms: Time to wait before asserting a WARN_ON(1). If nothing is
               specified, 3000 ms is used.
 

Documentation/devicetree/bindings/power/supply/axp20x_ac_power.txt

···
  - compatible: One of:
 			"x-powers,axp202-ac-power-supply"
 			"x-powers,axp221-ac-power-supply"
+			"x-powers,axp813-ac-power-supply"
 
 This node is a subnode of the axp20x PMIC.
 
···
 
 The AXP22X is only able to tell if an AC power supply is present and
 usable.
+
+AXP813/AXP803 are able to limit current and supply voltage
 
 Example:
 

Documentation/devicetree/bindings/power/supply/battery.txt

···
  - charge-term-current-microamp: current for charge termination phase
  - constant-charge-current-max-microamp: maximum constant input current
  - constant-charge-voltage-max-microvolt: maximum constant input voltage
+ - factory-internal-resistance-micro-ohms: battery factory internal resistance
+ - ocv-capacity-table-0: An array providing the open circuit voltage (OCV)
+   of the battery and corresponding battery capacity percent, which is used
+   to look up battery capacity according to current OCV value. And the open
+   circuit voltage unit is microvolt.
+ - ocv-capacity-table-1: Same as ocv-capacity-table-0
+ ......
+ - ocv-capacity-table-n: Same as ocv-capacity-table-0
+ - ocv-capacity-celsius: An array containing the temperature in degree Celsius,
+   for each of the battery capacity lookup table. The first temperature value
+   specifies the OCV table 0, and the second temperature value specifies the
+   OCV table 1, and so on.
 
 Battery properties are named, where possible, for the corresponding
 elements in enum power_supply_property, defined in
···
 		charge-term-current-microamp = <128000>;
 		constant-charge-current-max-microamp = <900000>;
 		constant-charge-voltage-max-microvolt = <4200000>;
+		factory-internal-resistance-micro-ohms = <250000>;
+		ocv-capacity-celsius = <(-10) 0 10>;
+		ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>, ...;
+		ocv-capacity-table-1 = <4200000 100>, <4185000 95>, <4113000 90>, ...;
+		ocv-capacity-table-2 = <4250000 100>, <4200000 95>, <4185000 90>, ...;
 	};
 
 	charger: charger@11 {

Documentation/devicetree/bindings/power/supply/bq24190.txt

···
 Required properties:
 - compatible: contains one of the following:
     * "ti,bq24190"
+    * "ti,bq24192"
     * "ti,bq24192i"
+    * "ti,bq24196"
 - reg: integer, I2C address of the charger.
 - interrupts[-extended]: configuration for charger INT pin.
 
···
   See also Documentation/devicetree/bindings/power/supply/battery.txt
 - ti,system-minimum-microvolt: when power is connected and the battery is below
   minimum system voltage, the system will be regulated above this setting.
+
+child nodes:
+- usb-otg-vbus:
+  Usage: optional
+  Description: Regulator that is used to control the VBUS voltage direction for
+               either USB host mode or for charging on the OTG port.
 
 Notes:
 - Some circuit boards wire the chip's "OTG" pin high (enabling 500mA default
···
 		interrupts-extended = <&gpiochip 10 IRQ_TYPE_EDGE_FALLING>;
 		monitored-battery = <&bat>;
 		ti,system-minimum-microvolt = <3200000>;
+
+		usb_otg_vbus: usb-otg-vbus { };
 	};
 
 	&twl_gpio {

Documentation/devicetree/bindings/power/supply/sc27xx-fg.txt

···
+Spreadtrum SC27XX PMICs Fuel Gauge Unit Power Supply Bindings
+
+Required properties:
+- compatible: Should be one of the following:
+  "sprd,sc2720-fgu",
+  "sprd,sc2721-fgu",
+  "sprd,sc2723-fgu",
+  "sprd,sc2730-fgu",
+  "sprd,sc2731-fgu".
+- reg: The address offset of fuel gauge unit.
+- battery-detect-gpios: GPIO for battery detection.
+- io-channels: Specify the IIO ADC channel to get temperature.
+- io-channel-names: Should be "bat-temp".
+- nvmem-cells: A phandle to the calibration cells provided by eFuse device.
+- nvmem-cell-names: Should be "fgu_calib".
+- monitored-battery: Phandle of battery characteristics devicetree node.
+  See Documentation/devicetree/bindings/power/supply/battery.txt
+
+Example:
+
+	bat: battery {
+		compatible = "simple-battery";
+		charge-full-design-microamp-hours = <1900000>;
+		constant-charge-voltage-max-microvolt = <4350000>;
+		ocv-capacity-celsius = <20>;
+		ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>,
+					<4022000 85>, <3983000 80>, <3949000 75>,
+					<3917000 70>, <3889000 65>, <3864000 60>,
+					<3835000 55>, <3805000 50>, <3787000 45>,
+					<3777000 40>, <3773000 35>, <3770000 30>,
+					<3765000 25>, <3752000 20>, <3724000 15>,
+					<3680000 10>, <3605000 5>, <3400000 0>;
+		......
+	};
+
+	sc2731_pmic: pmic@0 {
+		compatible = "sprd,sc2731";
+		reg = <0>;
+		spi-max-frequency = <26000000>;
+		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		fgu@a00 {
+			compatible = "sprd,sc2731-fgu";
+			reg = <0xa00>;
+			battery-detect-gpios = <&pmic_eic 9 GPIO_ACTIVE_HIGH>;
+			io-channels = <&pmic_adc 5>;
+			io-channel-names = "bat-temp";
+			nvmem-cells = <&fgu_calib>;
+			nvmem-cell-names = "fgu_calib";
+			monitored-battery = <&bat>;
+		};
+	};

drivers/power/reset/at91-poweroff.c

···
 	[AT91_SHDW_WKMODE0_ANYLEVEL]	= "any",
 };
 
-static void __iomem *at91_shdwc_base;
-static struct clk *sclk;
-static void __iomem *mpddrc_base;
+static struct shdwc {
+	struct clk *sclk;
+	void __iomem *shdwc_base;
+	void __iomem *mpddrc_base;
+} at91_shdwc;
 
 static void __init at91_wakeup_status(struct platform_device *pdev)
 {
 	const char *reason;
-	u32 reg = readl(at91_shdwc_base + AT91_SHDW_SR);
+	u32 reg = readl(at91_shdwc.shdwc_base + AT91_SHDW_SR);
 
 	/* Simple power-on, just bail out */
 	if (!reg)
···
 
 static void at91_poweroff(void)
 {
-	writel(AT91_SHDW_KEY | AT91_SHDW_SHDW, at91_shdwc_base + AT91_SHDW_CR);
-}
-
-static void at91_lpddr_poweroff(void)
-{
 	asm volatile(
 		/* Align to cache lines */
 		".balign 32\n\t"
···
 		"	ldr	r6, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
 
 		/* Power down SDRAM0 */
+		"	tst	%0, #0\n\t"
+		"	beq	1f\n\t"
 		"	str	%1, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
 		/* Shutdown CPU */
-		"	str	%3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
+		"1:	str	%3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
 
 		"	b	.\n\t"
 		:
-		: "r" (mpddrc_base),
+		: "r" (at91_shdwc.mpddrc_base),
 		  "r" cpu_to_le32(AT91_DDRSDRC_LPDDR2_PWOFF),
-		  "r" (at91_shdwc_base),
+		  "r" (at91_shdwc.shdwc_base),
 		  "r" cpu_to_le32(AT91_SHDW_KEY | AT91_SHDW_SHDW)
 		: "r6");
 }
···
 	if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
 			mode |= AT91_SHDW_RTTWKEN;
 
-	writel(wakeup_mode | mode, at91_shdwc_base + AT91_SHDW_MR);
+	writel(wakeup_mode | mode, at91_shdwc.shdwc_base + AT91_SHDW_MR);
 }
 
 static int __init at91_poweroff_probe(struct platform_device *pdev)
···
 	int ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(at91_shdwc_base))
-		return PTR_ERR(at91_shdwc_base);
+	at91_shdwc.shdwc_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(at91_shdwc.shdwc_base))
+		return PTR_ERR(at91_shdwc.shdwc_base);
 
-	sclk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(sclk))
-		return PTR_ERR(sclk);
+	at91_shdwc.sclk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(at91_shdwc.sclk))
+		return PTR_ERR(at91_shdwc.sclk);
 
-	ret = clk_prepare_enable(sclk);
+	ret = clk_prepare_enable(at91_shdwc.sclk);
 	if (ret) {
 		dev_err(&pdev->dev, "Could not enable slow clock\n");
 		return ret;
···
 	if (pdev->dev.of_node)
 		at91_poweroff_dt_set_wakeup_mode(pdev);
 
+	np = of_find_compatible_node(NULL, NULL, "atmel,sama5d3-ddramc");
+	if (np) {
+		at91_shdwc.mpddrc_base = of_iomap(np, 0);
+		of_node_put(np);
+
+		if (!at91_shdwc.mpddrc_base) {
+			ret = -ENOMEM;
+			goto clk_disable;
+		}
+
+		ddr_type = readl(at91_shdwc.mpddrc_base + AT91_DDRSDRC_MDR) &
+				 AT91_DDRSDRC_MD;
+		if (ddr_type != AT91_DDRSDRC_MD_LPDDR2 &&
+		    ddr_type != AT91_DDRSDRC_MD_LPDDR3) {
+			iounmap(at91_shdwc.mpddrc_base);
+			at91_shdwc.mpddrc_base = NULL;
+		}
+	}
+
 	pm_power_off = at91_poweroff;
 
-	np = of_find_compatible_node(NULL, NULL, "atmel,sama5d3-ddramc");
-	if (!np)
-		return 0;
-
-	mpddrc_base = of_iomap(np, 0);
-	of_node_put(np);
-
-	if (!mpddrc_base)
-		return 0;
-
-	ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & AT91_DDRSDRC_MD;
-	if ((ddr_type == AT91_DDRSDRC_MD_LPDDR2) ||
-	    (ddr_type == AT91_DDRSDRC_MD_LPDDR3))
-		pm_power_off = at91_lpddr_poweroff;
-	else
-		iounmap(mpddrc_base);
-
 	return 0;
+
+clk_disable:
+	clk_disable_unprepare(at91_shdwc.sclk);
+	return ret;
 }
 
 static int __exit at91_poweroff_remove(struct platform_device *pdev)
 {
-	if (pm_power_off == at91_poweroff ||
-	    pm_power_off == at91_lpddr_poweroff)
+	if (pm_power_off == at91_poweroff)
 		pm_power_off = NULL;
 
-	clk_disable_unprepare(sclk);
+	if (at91_shdwc.mpddrc_base)
+		iounmap(at91_shdwc.mpddrc_base);
+
+	clk_disable_unprepare(at91_shdwc.sclk);
 
 	return 0;
 }
-
-static const struct of_device_id at91_ramc_of_match[] = {
-	{ .compatible = "atmel,sama5d3-ddramc", },
-	{ /* sentinel */ }
-};
 
 static const struct of_device_id at91_poweroff_of_match[] = {
 	{ .compatible = "atmel,at91sam9260-shdwc", },

drivers/power/reset/gpio-poweroff.c

···
  */
 static struct gpio_desc *reset_gpio;
 static u32 timeout = DEFAULT_TIMEOUT_MS;
+static u32 active_delay = 100;
+static u32 inactive_delay = 100;
 
 static void gpio_poweroff_do_poweroff(void)
 {
···
 
 	/* drive it active, also inactive->active edge */
 	gpiod_direction_output(reset_gpio, 1);
-	mdelay(100);
+	mdelay(active_delay);
+
 	/* drive inactive, also active->inactive edge */
 	gpiod_set_value_cansleep(reset_gpio, 0);
-	mdelay(100);
+	mdelay(inactive_delay);
 
 	/* drive it active, also inactive->active edge */
 	gpiod_set_value_cansleep(reset_gpio, 1);
···
 	else
 		flags = GPIOD_OUT_LOW;
 
+	device_property_read_u32(&pdev->dev, "active-delay-ms", &active_delay);
+	device_property_read_u32(&pdev->dev, "inactive-delay-ms",
+				 &inactive_delay);
 	device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);
 
 	reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);

drivers/power/reset/ocelot-reset.c

···
 
 #define SOFT_CHIP_RST BIT(0)
 
+#define ICPU_CFG_CPU_SYSTEM_CTRL_GENERAL_CTRL	0x24
+#define IF_SI_OWNER_MASK			GENMASK(1, 0)
+#define IF_SI_OWNER_SISL			0
+#define IF_SI_OWNER_SIBM			1
+#define IF_SI_OWNER_SIMC			2
+#define IF_SI_OWNER_OFFSET			4
+
 static int ocelot_restart_handle(struct notifier_block *this,
 				 unsigned long mode, void *cmd)
 {
···
 	/* Make sure the core is not protected from reset */
 	regmap_update_bits(ctx->cpu_ctrl, ICPU_CFG_CPU_SYSTEM_CTRL_RESET,
 			   CORE_RST_PROTECT, 0);
+
+	/* Make the SI back to boot mode */
+	regmap_update_bits(ctx->cpu_ctrl, ICPU_CFG_CPU_SYSTEM_CTRL_GENERAL_CTRL,
+			   IF_SI_OWNER_MASK << IF_SI_OWNER_OFFSET,
+			   IF_SI_OWNER_SIBM << IF_SI_OWNER_OFFSET);
 
 	writel(SOFT_CHIP_RST, ctx->base);
 

drivers/power/supply/Kconfig

···
 	 Say Y here to enable support for battery charging with SC2731
 	 PMIC chips.
 
+config FUEL_GAUGE_SC27XX
+	tristate "Spreadtrum SC27XX fuel gauge driver"
+	depends on MFD_SC27XX_PMIC || COMPILE_TEST
+	depends on IIO
+	help
+	 Say Y here to enable support for fuel gauge with SC27XX
+	 PMIC chips.
+
 endif # POWER_SUPPLY

drivers/power/supply/Makefile

···
 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

drivers/power/supply/axp20x_ac_power.c

···
 #define AXP20X_PWR_STATUS_ACIN_PRESENT	BIT(7)
 #define AXP20X_PWR_STATUS_ACIN_AVAIL	BIT(6)
 
+#define AXP813_VHOLD_MASK		GENMASK(5, 3)
+#define AXP813_VHOLD_UV_TO_BIT(x)	((((x) / 100000) - 40) << 3)
+#define AXP813_VHOLD_REG_TO_UV(x)	\
+	(((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000)
+
+#define AXP813_CURR_LIMIT_MASK		GENMASK(2, 0)
+#define AXP813_CURR_LIMIT_UA_TO_BIT(x)	(((x) / 500000) - 3)
+#define AXP813_CURR_LIMIT_REG_TO_UA(x)	\
+	((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000)
+
 #define DRVNAME "axp20x-ac-power-supply"
 
 struct axp20x_ac_power {
···
 
 		return 0;
 
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+		ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, &reg);
+		if (ret)
+			return ret;
+
+		val->intval = AXP813_VHOLD_REG_TO_UV(reg);
+
+		return 0;
+
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, &reg);
+		if (ret)
+			return ret;
+
+		val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg);
+		/* AXP813 datasheet defines values 11x as 4000mA */
+		if (val->intval > 4000000)
+			val->intval = 4000000;
+
+		return 0;
+
 	default:
 		return -EINVAL;
 	}
 
 	return -EINVAL;
+}
+
+static int axp813_ac_power_set_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					const union power_supply_propval *val)
+{
+	struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+		if (val->intval < 4000000 || val->intval > 4700000)
+			return -EINVAL;
+
+		return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
+					  AXP813_VHOLD_MASK,
+					  AXP813_VHOLD_UV_TO_BIT(val->intval));
+
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		if (val->intval < 1500000 || val->intval > 4000000)
+			return -EINVAL;
+
+		return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
+					  AXP813_CURR_LIMIT_MASK,
+					  AXP813_CURR_LIMIT_UA_TO_BIT(val->intval));
+
+	default:
+		return -EINVAL;
+	}
+
+	return -EINVAL;
+}
+
+static int axp813_ac_power_prop_writeable(struct power_supply *psy,
+					  enum power_supply_property psp)
+{
+	return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
+	       psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
 }
 
 static enum power_supply_property axp20x_ac_power_properties[] = {
···
 	POWER_SUPPLY_PROP_HEALTH,
 	POWER_SUPPLY_PROP_PRESENT,
 	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static enum power_supply_property axp813_ac_power_properties[] = {
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 };
 
 static const struct power_supply_desc axp20x_ac_power_desc = {
···
 	.get_property = axp20x_ac_power_get_property,
 };
 
+static const struct power_supply_desc axp813_ac_power_desc = {
+	.name = "axp813-ac",
+	.type = POWER_SUPPLY_TYPE_MAINS,
+	.properties = axp813_ac_power_properties,
+	.num_properties = ARRAY_SIZE(axp813_ac_power_properties),
+	.property_is_writeable = axp813_ac_power_prop_writeable,
+	.get_property = axp20x_ac_power_get_property,
+	.set_property = axp813_ac_power_set_property,
+};
+
 struct axp_data {
 	const struct power_supply_desc	*power_desc;
 	bool				acin_adc;
···
 
 static const struct axp_data axp22x_data = {
 	.power_desc = &axp22x_ac_power_desc,
+	.acin_adc = false,
+};
+
+static const struct axp_data axp813_data = {
+	.power_desc = &axp813_ac_power_desc,
 	.acin_adc = false,
 };
 
···
 	}, {
 		.compatible = "x-powers,axp221-ac-power-supply",
 		.data = &axp22x_data,
+	}, {
+		.compatible = "x-powers,axp813-ac-power-supply",
+		.data = &axp813_data,
 	}, { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);

drivers/power/supply/axp20x_usb_power.c

···
  * option) any later version.
  */
 
+#include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>

drivers/power/supply/axp288_charger.c

···
  */
 
 #include <linux/acpi.h>
+#include <linux/bitops.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/regmap.h>
···
 #include <linux/mfd/axp20x.h>
 #include <linux/extcon.h>
 
-#define PS_STAT_VBUS_TRIGGER		(1 << 0)
-#define PS_STAT_BAT_CHRG_DIR		(1 << 2)
-#define PS_STAT_VBAT_ABOVE_VHOLD	(1 << 3)
-#define PS_STAT_VBUS_VALID		(1 << 4)
-#define PS_STAT_VBUS_PRESENT		(1 << 5)
+#define PS_STAT_VBUS_TRIGGER		BIT(0)
+#define PS_STAT_BAT_CHRG_DIR		BIT(2)
+#define PS_STAT_VBAT_ABOVE_VHOLD	BIT(3)
+#define PS_STAT_VBUS_VALID		BIT(4)
+#define PS_STAT_VBUS_PRESENT		BIT(5)
 
-#define CHRG_STAT_BAT_SAFE_MODE		(1 << 3)
-#define CHRG_STAT_BAT_VALID		(1 << 4)
-#define CHRG_STAT_BAT_PRESENT		(1 << 5)
-#define CHRG_STAT_CHARGING		(1 << 6)
-#define CHRG_STAT_PMIC_OTP		(1 << 7)
+#define CHRG_STAT_BAT_SAFE_MODE		BIT(3)
+#define CHRG_STAT_BAT_VALID		BIT(4)
+#define CHRG_STAT_BAT_PRESENT		BIT(5)
+#define CHRG_STAT_CHARGING		BIT(6)
+#define CHRG_STAT_PMIC_OTP		BIT(7)
 
 #define VBUS_ISPOUT_CUR_LIM_MASK	0x03
 #define VBUS_ISPOUT_CUR_LIM_BIT_POS	0
···
 #define VBUS_ISPOUT_VHOLD_SET_OFFSET	4000	/* 4000mV */
 #define VBUS_ISPOUT_VHOLD_SET_LSB_RES	100	/* 100mV */
 #define VBUS_ISPOUT_VHOLD_SET_4300MV	0x3	/* 4300mV */
-#define VBUS_ISPOUT_VBUS_PATH_DIS	(1 << 7)
+#define VBUS_ISPOUT_VBUS_PATH_DIS	BIT(7)
 
 #define CHRG_CCCV_CC_MASK		0xf		/* 4 bits */
 #define CHRG_CCCV_CC_BIT_POS		0
 #define CHRG_CCCV_CC_OFFSET		200		/* 200mA */
 #define CHRG_CCCV_CC_LSB_RES		200		/* 200mA */
-#define CHRG_CCCV_ITERM_20P		(1 << 4)	/* 20% of CC */
+#define CHRG_CCCV_ITERM_20P		BIT(4)		/* 20% of CC */
 #define CHRG_CCCV_CV_MASK		0x60		/* 2 bits */
 #define CHRG_CCCV_CV_BIT_POS		5
 #define CHRG_CCCV_CV_4100MV		0x0		/* 4.10V */
 #define CHRG_CCCV_CV_4150MV		0x1		/* 4.15V */
 #define CHRG_CCCV_CV_4200MV		0x2		/* 4.20V */
 #define CHRG_CCCV_CV_4350MV		0x3		/* 4.35V */
-#define CHRG_CCCV_CHG_EN		(1 << 7)
+#define CHRG_CCCV_CHG_EN		BIT(7)
 
 #define CNTL2_CC_TIMEOUT_MASK		0x3	/* 2 bits */
 #define CNTL2_CC_TIMEOUT_OFFSET		6	/* 6 Hrs */
 #define CNTL2_CC_TIMEOUT_LSB_RES	2	/* 2 Hrs */
 #define CNTL2_CC_TIMEOUT_12HRS		0x3	/* 12 Hrs */
-#define CNTL2_CHGLED_TYPEB		(1 << 4)
-#define CNTL2_CHG_OUT_TURNON		(1 << 5)
+#define CNTL2_CHGLED_TYPEB		BIT(4)
+#define CNTL2_CHG_OUT_TURNON		BIT(5)
 #define CNTL2_PC_TIMEOUT_MASK		0xC0
 #define CNTL2_PC_TIMEOUT_OFFSET		40	/* 40 mins */
 #define CNTL2_PC_TIMEOUT_LSB_RES	10	/* 10 mins */
 #define CNTL2_PC_TIMEOUT_70MINS		0x3
 
-#define CHRG_ILIM_TEMP_LOOP_EN		(1 << 3)
+#define CHRG_ILIM_TEMP_LOOP_EN		BIT(3)
 #define CHRG_VBUS_ILIM_MASK		0xf0
 #define CHRG_VBUS_ILIM_BIT_POS		4
 #define CHRG_VBUS_ILIM_100MA		0x0	/* 100mA */
···
 #define CHRG_VLTFC_0C			0xA5	/* 0 DegC */
 #define CHRG_VHTFC_45C			0x1F	/* 45 DegC */
 
-#define FG_CNTL_OCV_ADJ_EN		(1 << 3)
+#define FG_CNTL_OCV_ADJ_EN		BIT(3)
 
 #define CV_4100MV			4100	/* 4100mV */
 #define CV_4150MV			4150	/* 4150mV */

drivers/power/supply/bq2415x_charger.c

···
 	return 0;
 }
 
-static int bq2415x_power_supply_init(struct bq2415x_device *bq)
-{
-	int ret;
-	int chip;
-	char revstr[8];
-	struct power_supply_config psy_cfg = {
-		.drv_data = bq,
-		.of_node = bq->dev->of_node,
-	};
-
-	bq->charger_desc.name = bq->name;
-	bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
-	bq->charger_desc.properties = bq2415x_power_supply_props;
-	bq->charger_desc.num_properties =
-			ARRAY_SIZE(bq2415x_power_supply_props);
-	bq->charger_desc.get_property = bq2415x_power_supply_get_property;
-
-	ret = bq2415x_detect_chip(bq);
-	if (ret < 0)
-		chip = BQUNKNOWN;
-	else
-		chip = ret;
-
-	ret = bq2415x_detect_revision(bq);
-	if (ret < 0)
-		strcpy(revstr, "unknown");
-	else
-		sprintf(revstr, "1.%d", ret);
-
-	bq->model = kasprintf(GFP_KERNEL,
-				"chip %s, revision %s, vender code %.3d",
-				bq2415x_chip_name[chip], revstr,
-				bq2415x_get_vender_code(bq));
-	if (!bq->model) {
-		dev_err(bq->dev, "failed to allocate model name\n");
-		return -ENOMEM;
-	}
-
-	bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
-					    &psy_cfg);
-	if (IS_ERR(bq->charger)) {
-		kfree(bq->model);
-		return PTR_ERR(bq->charger);
-	}
-
-	return 0;
-}
-
 static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
 {
 	bq->autotimer = 0;
···
 static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
 static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
 
-static struct attribute *bq2415x_sysfs_attributes[] = {
+static struct attribute *bq2415x_sysfs_attrs[] = {
 	/*
 	 * TODO: some (appropriate) of these attrs should be switched to
 	 * use power supply class props.
···
 	NULL,
 };
 
-static const struct attribute_group bq2415x_sysfs_attr_group = {
-	.attrs = bq2415x_sysfs_attributes,
-};
+ATTRIBUTE_GROUPS(bq2415x_sysfs);
 
-static int bq2415x_sysfs_init(struct bq2415x_device *bq)
+static int bq2415x_power_supply_init(struct bq2415x_device *bq)
 {
-	return sysfs_create_group(&bq->charger->dev.kobj,
-			&bq2415x_sysfs_attr_group);
-}
+	int ret;
+	int chip;
+	char revstr[8];
+	struct power_supply_config psy_cfg = {
+		.drv_data = bq,
+		.of_node = bq->dev->of_node,
+		.attr_grp = bq2415x_sysfs_groups,
+	};
 
-static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
-{
-	sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group);
+	bq->charger_desc.name = bq->name;
+	bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
+	bq->charger_desc.properties = bq2415x_power_supply_props;
+	bq->charger_desc.num_properties =
+			ARRAY_SIZE(bq2415x_power_supply_props);
+	bq->charger_desc.get_property = bq2415x_power_supply_get_property;
+
+	ret = bq2415x_detect_chip(bq);
+	if (ret < 0)
+		chip = BQUNKNOWN;
+	else
+		chip = ret;
+
+	ret = bq2415x_detect_revision(bq);
+	if (ret < 0)
+		strcpy(revstr, "unknown");
+	else
+		sprintf(revstr, "1.%d", ret);
+
+	bq->model = kasprintf(GFP_KERNEL,
+				"chip %s, revision %s, vender code %.3d",
+				bq2415x_chip_name[chip], revstr,
+				bq2415x_get_vender_code(bq));
+	if (!bq->model) {
+		dev_err(bq->dev, "failed to allocate model name\n");
+		return -ENOMEM;
+	}
+
+	bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
+					    &psy_cfg);
+	if (IS_ERR(bq->charger)) {
+		kfree(bq->model);
+		return PTR_ERR(bq->charger);
+	}
+
+	return 0;
 }
 
 /* main bq2415x probe function */
···
 		goto error_2;
 	}
 
-	ret = bq2415x_sysfs_init(bq);
-	if (ret) {
-		dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
-		goto error_3;
-	}
-
 	ret = bq2415x_set_defaults(bq);
 	if (ret) {
 		dev_err(bq->dev, "failed to set default values: %d\n", ret);
-		goto error_4;
+		goto error_3;
 	}
 
 	if (bq->notify_node || bq->init_data.notify_device) {
···
 		ret = power_supply_reg_notifier(&bq->nb);
 		if (ret) {
 			dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
-			goto error_4;
+			goto error_3;
 		}
 
 		bq->automode = 1;
···
 	dev_info(bq->dev, "driver registered\n");
 	return 0;
 
-error_4:
-	bq2415x_sysfs_exit(bq);
 error_3:
 	bq2415x_power_supply_exit(bq);
 error_2:
···
 		power_supply_unreg_notifier(&bq->nb);
 
 	of_node_put(bq->notify_node);
-	bq2415x_sysfs_exit(bq);
 	bq2415x_power_supply_exit(bq);
 
 	bq2415x_reset_chip(bq);

drivers/power/supply/bq24190_charger.c

···
 #include <linux/workqueue.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
+#include <linux/extcon-provider.h>
 
 #define	BQ24190_MANUFACTURER	"Texas Instruments"
 
···
 #define BQ24190_REG_VPRS_PN_MASK		(BIT(5) | BIT(4) | BIT(3))
 #define BQ24190_REG_VPRS_PN_SHIFT		3
 #define BQ24190_REG_VPRS_PN_24190			0x4
-#define BQ24190_REG_VPRS_PN_24192			0x5 /* Also 24193 */
+#define BQ24190_REG_VPRS_PN_24192			0x5 /* Also 24193, 24196 */
 #define BQ24190_REG_VPRS_PN_24192I			0x3
 #define BQ24190_REG_VPRS_TS_PROFILE_MASK	BIT(2)
 #define BQ24190_REG_VPRS_TS_PROFILE_SHIFT	2
···
 struct bq24190_dev_info {
 	struct i2c_client		*client;
 	struct device			*dev;
+	struct extcon_dev		*edev;
 	struct power_supply		*charger;
 	struct power_supply		*battery;
 	struct delayed_work		input_current_limit_work;
···
 	u8				f_reg;
 	u8				ss_reg;
 	u8				watchdog;
+};
+
+static const unsigned int bq24190_usb_extcon_cable[] = {
+	EXTCON_USB,
+	EXTCON_NONE,
 };
 
 /*
···
 static struct attribute *
 	bq24190_sysfs_attrs[ARRAY_SIZE(bq24190_sysfs_field_tbl) + 1];
 
-static const struct attribute_group bq24190_sysfs_attr_group = {
-	.attrs = bq24190_sysfs_attrs,
-};
+ATTRIBUTE_GROUPS(bq24190_sysfs);
 
 static void bq24190_sysfs_init_attrs(void)
 {
···
 
 	return count;
 }
-
-static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
-{
-	bq24190_sysfs_init_attrs();
-
-	return sysfs_create_group(&bdi->charger->dev.kobj,
-			&bq24190_sysfs_attr_group);
-}
-
-static void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi)
-{
-	sysfs_remove_group(&bdi->charger->dev.kobj, &bq24190_sysfs_attr_group);
-}
-#else
-static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
-{
-	return 0;
-}
-
-static inline void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) {}
 #endif
 
 #ifdef CONFIG_REGULATOR
···
 
 static const struct regulator_desc bq24190_vbus_desc = {
 	.name = "usb_otg_vbus",
+	.of_match = "usb-otg-vbus",
 	.type = REGULATOR_VOLTAGE,
 	.owner = THIS_MODULE,
 	.ops = &bq24190_vbus_ops,
···
 	.property_is_writeable	= bq24190_battery_property_is_writeable,
 };
 
+static int bq24190_configure_usb_otg(struct bq24190_dev_info *bdi, u8 ss_reg)
+{
+	bool otg_enabled;
+	int ret;
+
+	otg_enabled = !!(ss_reg & BQ24190_REG_SS_VBUS_STAT_MASK);
+	ret = extcon_set_state_sync(bdi->edev, EXTCON_USB, otg_enabled);
+	if (ret < 0)
+		dev_err(bdi->dev, "Can't set extcon state to %d: %d\n",
+			otg_enabled, ret);
+
+	return ret;
+}
+
 static void bq24190_check_status(struct bq24190_dev_info *bdi)
 {
 	const u8 battery_mask_ss = BQ24190_REG_SS_CHRG_STAT_MASK;
···
 		bdi->ss_reg = ss_reg;
 	}
 
-	if (alert_charger || alert_battery)
+	if (alert_charger || alert_battery) {
 		power_supply_changed(bdi->charger);
+		bq24190_configure_usb_otg(bdi, ss_reg);
+	}
 	if (alert_battery && bdi->battery)
 		power_supply_changed(bdi->battery);
 
···
 	if (ret < 0)
 		return ret;
 
-	if (v != BQ24190_REG_VPRS_PN_24190 &&
-	    v != BQ24190_REG_VPRS_PN_24192I) {
+	switch (v) {
+	case BQ24190_REG_VPRS_PN_24190:
+	case BQ24190_REG_VPRS_PN_24192:
+	case BQ24190_REG_VPRS_PN_24192I:
+		break;
+	default:
 		dev_err(bdi->dev, "Error unknown model: 0x%02x\n", v);
 		return -ENODEV;
 	}
···
 		return -EINVAL;
 	}
 
+	bdi->edev = devm_extcon_dev_allocate(dev, bq24190_usb_extcon_cable);
+	if (IS_ERR(bdi->edev))
+		return PTR_ERR(bdi->edev);
+
+	ret = devm_extcon_dev_register(dev, bdi->edev);
+	if (ret < 0)
+		return ret;
+
 	pm_runtime_enable(dev);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_set_autosuspend_delay(dev, 600);
···
 		dev_err(dev, "pm_runtime_get failed: %i\n", ret);
 		goto out_pmrt;
 	}
+
+#ifdef CONFIG_SYSFS
+	bq24190_sysfs_init_attrs();
+	charger_cfg.attr_grp = bq24190_sysfs_groups;
+#endif
 
 	charger_cfg.drv_data = bdi;
 	charger_cfg.of_node = dev->of_node;
···
 		goto out_charger;
 	}
 
-	ret = bq24190_sysfs_create_group(bdi);
-	if (ret < 0) {
-		dev_err(dev, "Can't create sysfs entries\n");
+	ret = bq24190_configure_usb_otg(bdi, bdi->ss_reg);
+	if (ret < 0)
 		goto out_charger;
-	}
 
 	bdi->initialized = true;
 
···
 			"bq24190-charger", bdi);
 	if (ret < 0) {
 		dev_err(dev, "Can't set up irq handler\n");
-		goto out_sysfs;
+		goto out_charger;
 	}
 
 	ret = bq24190_register_vbus_regulator(bdi);
 	if (ret < 0)
-		goto out_sysfs;
+		goto out_charger;
 
 	enable_irq_wake(client->irq);
 
···
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;
-
-out_sysfs:
-	bq24190_sysfs_remove_group(bdi);
 
 out_charger:
 	if (!IS_ERR_OR_NULL(bdi->battery))
···
 	}
 
 	bq24190_register_reset(bdi);
-	bq24190_sysfs_remove_group(bdi);
 	if (bdi->battery)
 		power_supply_unregister(bdi->battery);
 	power_supply_unregister(bdi->charger);
···
 
 static const struct i2c_device_id bq24190_i2c_ids[] = {
 	{ "bq24190" },
+	{ "bq24192" },
 	{ "bq24192i" },
+	{ "bq24196" },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, bq24190_i2c_ids);
···
 #ifdef CONFIG_OF
 static const struct of_device_id bq24190_of_match[] = {
 	{ .compatible = "ti,bq24190", },
+	{ .compatible = "ti,bq24192", },
 	{ .compatible = "ti,bq24192i", },
+	{ .compatible = "ti,bq24196", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bq24190_of_match);

drivers/power/supply/bq24257_charger.c

···
 static DEVICE_ATTR(sysoff_enable, S_IWUSR | S_IRUGO,
 		   bq24257_sysfs_show_enable, bq24257_sysfs_set_enable);
 
-static struct attribute *bq24257_charger_attr[] = {
+static struct attribute *bq24257_charger_sysfs_attrs[] = {
 	&dev_attr_ovp_voltage.attr,
 	&dev_attr_in_dpm_voltage.attr,
 	&dev_attr_high_impedance_enable.attr,
···
 	NULL,
 };
 
-static const struct attribute_group bq24257_attr_group = {
-	.attrs = bq24257_charger_attr,
-};
+ATTRIBUTE_GROUPS(bq24257_charger_sysfs);
 
 static int bq24257_power_supply_init(struct bq24257_device *bq)
 {
 	struct power_supply_config psy_cfg = { .drv_data = bq, };
 
+	psy_cfg.attr_grp = bq24257_charger_sysfs_groups;
 	psy_cfg.supplied_to = bq24257_charger_supplied_to;
 	psy_cfg.num_supplicants = ARRAY_SIZE(bq24257_charger_supplied_to);
 
···
 		return ret;
 	}
 
-	ret = sysfs_create_group(&bq->charger->dev.kobj, &bq24257_attr_group);
-	if (ret < 0) {
-		dev_err(dev, "Can't create sysfs entries\n");
-		return ret;
-	}
-
 	return 0;
 }
 
···
 
 	if (bq->iilimit_autoset_enable)
 		cancel_delayed_work_sync(&bq->iilimit_setup_work);
-
-	sysfs_remove_group(&bq->charger->dev.kobj, &bq24257_attr_group);
 
 	bq24257_field_write(bq, F_RESET, 1); /* reset to defaults */
 

drivers/power/supply/bq25890_charger.c

···
 	[F_CHG_TMR]		= REG_FIELD(0x07, 1, 2),
 	[F_JEITA_ISET]		= REG_FIELD(0x07, 0, 0),
 	/* REG08 */
-	[F_BATCMP]		= REG_FIELD(0x08, 6, 7), // 5-7 on BQ25896
+	[F_BATCMP]		= REG_FIELD(0x08, 5, 7),
 	[F_VCLAMP]		= REG_FIELD(0x08, 2, 4),
 	[F_TREG]		= REG_FIELD(0x08, 0, 1),
 	/* REG09 */

drivers/power/supply/charger-manager.c

···
 	int err = 0, i;
 	struct charger_desc *desc = cm->desc;
 
-	/* Ignore if it's redundent command */
+	/* Ignore if it's redundant command */
 	if (enable == cm->charger_enabled)
 		return 0;
 
···
 	if (ret < 0) {
 		pr_info("Cannot register extcon_dev for %s(cable: %s)\n",
 			cable->extcon_name, cable->name);
-		ret = -EINVAL;
 	}
 
 	return ret;
···
 }
 
 /**
- * charger_manager_register_sysfs - Register sysfs entry for each charger
+ * charger_manager_prepare_sysfs - Prepare sysfs entry for each charger
  * @cm: the Charger Manager representing the battery.
  *
  * This function add sysfs entry for charger(regulator) to control charger from
···
  * externally_control, this charger isn't controlled from charger-manager and
  * always stay off state of regulator.
  */
-static int charger_manager_register_sysfs(struct charger_manager *cm)
+static int charger_manager_prepare_sysfs(struct charger_manager *cm)
 {
 	struct charger_desc *desc = cm->desc;
 	struct charger_regulator *charger;
 	int chargers_externally_control = 1;
-	char buf[11];
-	char *str;
-	int ret;
+	char *name;
 	int i;
 
 	/* Create sysfs entry to control charger(regulator) */
 	for (i = 0; i < desc->num_charger_regulators; i++) {
 		charger = &desc->charger_regulators[i];
 
-		snprintf(buf, 10, "charger.%d", i);
-		str = devm_kzalloc(cm->dev,
-				strlen(buf) + 1, GFP_KERNEL);
-		if (!str)
+		name = devm_kasprintf(cm->dev, GFP_KERNEL, "charger.%d", i);
+		if (!name)
 			return -ENOMEM;
-
-		strcpy(str, buf);
 
 		charger->attrs[0] = &charger->attr_name.attr;
 		charger->attrs[1] = &charger->attr_state.attr;
 		charger->attrs[2] = &charger->attr_externally_control.attr;
 		charger->attrs[3] = NULL;
-		charger->attr_g.name = str;
-		charger->attr_g.attrs = charger->attrs;
+
+		charger->attr_grp.name = name;
+		charger->attr_grp.attrs = charger->attrs;
+		desc->sysfs_groups[i] = &charger->attr_grp;
 
 		sysfs_attr_init(&charger->attr_name.attr);
 		charger->attr_name.attr.name = "name";
···
 
 		dev_info(cm->dev, "'%s' regulator's externally_control is %d\n",
 			 charger->regulator_name, charger->externally_control);
-
-		ret = sysfs_create_group(&cm->charger_psy->dev.kobj,
-					&charger->attr_g);
-		if (ret < 0) {
-			dev_err(cm->dev, "Cannot create sysfs entry of %s regulator\n",
-				charger->regulator_name);
-			return ret;
-		}
 	}
 
 	if (chargers_externally_control) {
···
 	/* chargers */
 	of_property_read_u32(np, "cm-num-chargers", &num_chgs);
 	if (num_chgs) {
+		int i;
+
 		/* Allocate empty bin at the tail of array */
 		desc->psy_charger_stat = devm_kcalloc(dev,
 						      num_chgs + 1,
 						      sizeof(char *),
 						      GFP_KERNEL);
-		if (desc->psy_charger_stat) {
-			int i;
-			for (i = 0; i < num_chgs; i++)
-				of_property_read_string_index(np, "cm-chargers",
-						i, &desc->psy_charger_stat[i]);
-		} else {
+		if (!desc->psy_charger_stat)
 			return ERR_PTR(-ENOMEM);
-		}
+
+		for (i = 0; i < num_chgs; i++)
+			of_property_read_string_index(np, "cm-chargers",
+						      i, &desc->psy_charger_stat[i]);
 	}
 
 	of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge);
···
 			return ERR_PTR(-ENOMEM);
 
 		desc->charger_regulators = chg_regs;
+
+		desc->sysfs_groups = devm_kcalloc(dev,
+					desc->num_charger_regulators + 1,
+					sizeof(*desc->sysfs_groups),
+					GFP_KERNEL);
+		if (!desc->sysfs_groups)
+			return ERR_PTR(-ENOMEM);
 
 		for_each_child_of_node(np, child) {
 			struct charger_cable *cables;
···
 
 	if (IS_ERR(desc)) {
 		dev_err(&pdev->dev, "No platform data (desc) found\n");
-		return -ENODEV;
+		return PTR_ERR(desc);
 	}
 
 	cm = devm_kzalloc(&pdev->dev, sizeof(*cm), GFP_KERNEL);
···
 		dev_err(&pdev->dev, "No fuel gauge power supply defined\n");
 		return -EINVAL;
 	}
-
-	/* Counting index only */
-	while (desc->psy_charger_stat[i])
-		i++;
 
 	/* Check if charger's supplies are present at probe */
 	for (i = 0; desc->psy_charger_stat[i]; i++) {
···
 
 	INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
 
+	/* Register sysfs entry for charger(regulator) */
+	ret = charger_manager_prepare_sysfs(cm);
+	if (ret < 0) {
+		dev_err(&pdev->dev,
+			"Cannot prepare sysfs entry of regulators\n");
+		return ret;
+	}
+	psy_cfg.attr_grp = desc->sysfs_groups;
+
 	cm->charger_psy = power_supply_register(&pdev->dev,
 						&cm->charger_psy_desc,
 						&psy_cfg);
···
 		goto err_reg_extcon;
 	}
 
-	/* Register sysfs entry for charger(regulator) */
-	ret = charger_manager_register_sysfs(cm);
-	if (ret < 0) {
-		dev_err(&pdev->dev,
-			"Cannot initialize sysfs entry of regulator\n");
-		goto err_reg_sysfs;
-	}
-
 	/* Add to the list */
 	mutex_lock(&cm_list_mtx);
 	list_add(&cm->entry, &cm_list);
···
 
 	/*
 	 * Charger-manager is capable of waking up the systme from sleep
-	 * when event is happend through cm_notify_event()
+	 * when event is happened through cm_notify_event()
 	 */
 	device_init_wakeup(&pdev->dev, true);
 	device_set_wakeup_capable(&pdev->dev, false);
···
 
 	return 0;
 
-err_reg_sysfs:
-	for (i = 0; i < desc->num_charger_regulators; i++) {
-		struct charger_regulator *charger;
-
-		charger = &desc->charger_regulators[i];
-		sysfs_remove_group(&cm->charger_psy->dev.kobj,
-				&charger->attr_g);
-	}
 err_reg_extcon:
 	for (i = 0; i < desc->num_charger_regulators; i++) {
 		struct charger_regulator *charger;
···
  * cm_notify_event - charger driver notify Charger Manager of charger event
  * @psy: pointer to instance of charger's power_supply
  * @type: type of charger event
- * @msg: optional message passed to uevent_notify fuction
+ * @msg: optional message passed to uevent_notify function
  */
 void cm_notify_event(struct power_supply *psy, enum cm_event_types type,
 		     char *msg)

drivers/power/supply/cpcap-battery.c

···
 static int cpcap_battery_init_interrupts(struct platform_device *pdev,
 					 struct cpcap_battery_ddata *ddata)
 {
-	const char * const cpcap_battery_irqs[] = {
+	static const char * const cpcap_battery_irqs[] = {
 		"eol", "lowbph", "lowbpl",
 		"chrgcurr1", "battdetb"
 	};

drivers/power/supply/cpcap-charger.c

···
 		if (IS_ERR(ddata->gpio[i])) {
 			dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
 				 i, PTR_ERR(ddata->gpio[i]));
-				 ddata->gpio[i] = NULL;
+			ddata->gpio[i] = NULL;
 		}
 	}
 }

drivers/power/supply/ds2780_battery.c

···
 	return count;
 }
 
-static const struct bin_attribute ds2780_param_eeprom_bin_attr = {
+static struct bin_attribute ds2780_param_eeprom_bin_attr = {
 	.attr = {
 		.name = "param_eeprom",
 		.mode = S_IRUGO | S_IWUSR,
···
 	return count;
 }
 
-static const struct bin_attribute ds2780_user_eeprom_bin_attr = {
+static struct bin_attribute ds2780_user_eeprom_bin_attr = {
 	.attr = {
 		.name = "user_eeprom",
 		.mode = S_IRUGO | S_IWUSR,
···
 static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2780_get_pio_pin,
 	ds2780_set_pio_pin);
 
-
-static struct attribute *ds2780_attributes[] = {
+static struct attribute *ds2780_sysfs_attrs[] = {
 	&dev_attr_pmod_enabled.attr,
 	&dev_attr_sense_resistor_value.attr,
 	&dev_attr_rsgain_setting.attr,
···
 	NULL
 };
 
-static const struct attribute_group ds2780_attr_group = {
-	.attrs = ds2780_attributes,
+static struct bin_attribute *ds2780_sysfs_bin_attrs[] = {
+	&ds2780_param_eeprom_bin_attr,
+	&ds2780_user_eeprom_bin_attr,
+	NULL
+};
+
+static const struct attribute_group ds2780_sysfs_group = {
+	.attrs = ds2780_sysfs_attrs,
+	.bin_attrs = ds2780_sysfs_bin_attrs,
+};
+
+static const struct attribute_group *ds2780_sysfs_groups[] = {
+	&ds2780_sysfs_group,
+	NULL,
 };
 
 static int ds2780_battery_probe(struct platform_device *pdev)
 {
 	struct power_supply_config psy_cfg = {};
-	int ret = 0;
 	struct ds2780_device_info *dev_info;
 
 	dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
-	if (!dev_info) {
-		ret = -ENOMEM;
-		goto fail;
-	}
+	if (!dev_info)
+		return -ENOMEM;
 
 	platform_set_drvdata(pdev, dev_info);
 
···
 	dev_info->bat_desc.get_property	= ds2780_battery_get_property;
 
 	psy_cfg.drv_data		= dev_info;
+	psy_cfg.attr_grp		= ds2780_sysfs_groups;
 
-	dev_info->bat = power_supply_register(&pdev->dev, &dev_info->bat_desc,
-					      &psy_cfg);
+	dev_info->bat = devm_power_supply_register(&pdev->dev,
+						   &dev_info->bat_desc,
+						   &psy_cfg);
 	if (IS_ERR(dev_info->bat)) {
 		dev_err(dev_info->dev, "failed to register battery\n");
-		ret = PTR_ERR(dev_info->bat);
-		goto fail;
+		return PTR_ERR(dev_info->bat);
 	}
-
-	ret = sysfs_create_group(&dev_info->bat->dev.kobj, &ds2780_attr_group);
-	if (ret) {
-		dev_err(dev_info->dev, "failed to create sysfs group\n");
-		goto fail_unregister;
-	}
-
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
-					&ds2780_param_eeprom_bin_attr);
-	if (ret) {
-		dev_err(dev_info->dev,
-				"failed to create param eeprom bin file");
-		goto fail_remove_group;
-	}
-
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
-					&ds2780_user_eeprom_bin_attr);
-	if (ret) {
-		dev_err(dev_info->dev,
-				"failed to create user eeprom bin file");
-		goto fail_remove_bin_file;
-	}
-
-	return 0;
-
-fail_remove_bin_file:
-	sysfs_remove_bin_file(&dev_info->bat->dev.kobj,
-				&ds2780_param_eeprom_bin_attr);
-fail_remove_group:
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2780_attr_group);
-fail_unregister:
-	power_supply_unregister(dev_info->bat);
-fail:
-	return ret;
-}
-
-static int ds2780_battery_remove(struct platform_device *pdev)
-{
-	struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
-
-	/*
-	 * Remove attributes before unregistering power supply
-	 * because 'bat' will be freed on power_supply_unregister() call.
-	 */
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2780_attr_group);
-
-	power_supply_unregister(dev_info->bat);
 
 	return 0;
 }
···
 		.name = "ds2780-battery",
 	},
 	.probe	  = ds2780_battery_probe,
-	.remove   = ds2780_battery_remove,
 };
 
 module_platform_driver(ds2780_battery_driver);

drivers/power/supply/ds2781_battery.c

···
 	return count;
 }
 
-static const struct bin_attribute ds2781_param_eeprom_bin_attr = {
+static struct bin_attribute ds2781_param_eeprom_bin_attr = {
 	.attr = {
 		.name = "param_eeprom",
 		.mode = S_IRUGO | S_IWUSR,
···
 	return count;
 }
 
-static const struct bin_attribute ds2781_user_eeprom_bin_attr = {
+static struct bin_attribute ds2781_user_eeprom_bin_attr = {
 	.attr = {
 		.name = "user_eeprom",
 		.mode = S_IRUGO | S_IWUSR,
···
 static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin,
 	ds2781_set_pio_pin);
 
-
-static struct attribute *ds2781_attributes[] = {
+static struct attribute *ds2781_sysfs_attrs[] = {
 	&dev_attr_pmod_enabled.attr,
 	&dev_attr_sense_resistor_value.attr,
 	&dev_attr_rsgain_setting.attr,
···
 	NULL
 };
 
-static const struct attribute_group ds2781_attr_group = {
-	.attrs = ds2781_attributes,
+static struct bin_attribute *ds2781_sysfs_bin_attrs[] = {
+	&ds2781_param_eeprom_bin_attr,
+	&ds2781_user_eeprom_bin_attr,
+	NULL,
+};
+
+static const struct attribute_group ds2781_sysfs_group = {
+	.attrs = ds2781_sysfs_attrs,
+	.bin_attrs = ds2781_sysfs_bin_attrs,
+
+};
+
+static const struct attribute_group *ds2781_sysfs_groups[] = {
+	&ds2781_sysfs_group,
+	NULL,
 };
 
 static int ds2781_battery_probe(struct platform_device *pdev)
 {
 	struct power_supply_config psy_cfg = {};
-	int ret = 0;
 	struct ds2781_device_info *dev_info;
 
 	dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
···
 	dev_info->bat_desc.get_property	= ds2781_battery_get_property;
 
 	psy_cfg.drv_data		= dev_info;
+	psy_cfg.attr_grp		= ds2781_sysfs_groups;
 
-	dev_info->bat = power_supply_register(&pdev->dev, &dev_info->bat_desc,
-						&psy_cfg);
+	dev_info->bat = devm_power_supply_register(&pdev->dev,
+						   &dev_info->bat_desc,
+						   &psy_cfg);
 	if (IS_ERR(dev_info->bat)) {
 		dev_err(dev_info->dev, "failed to register battery\n");
-		ret = PTR_ERR(dev_info->bat);
-		goto fail;
+		return PTR_ERR(dev_info->bat);
 	}
-
-	ret = sysfs_create_group(&dev_info->bat->dev.kobj, &ds2781_attr_group);
-	if (ret) {
-		dev_err(dev_info->dev, "failed to create sysfs group\n");
-		goto fail_unregister;
-	}
-
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
-					&ds2781_param_eeprom_bin_attr);
-	if (ret) {
-		dev_err(dev_info->dev,
-				"failed to create param eeprom bin file");
-		goto fail_remove_group;
-	}
-
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
-					&ds2781_user_eeprom_bin_attr);
-	if (ret) {
-		dev_err(dev_info->dev,
-				"failed to create user eeprom bin file");
-		goto fail_remove_bin_file;
-	}
-
-	return 0;
-
-fail_remove_bin_file:
-	sysfs_remove_bin_file(&dev_info->bat->dev.kobj,
-				&ds2781_param_eeprom_bin_attr);
-fail_remove_group:
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2781_attr_group);
-fail_unregister:
-	power_supply_unregister(dev_info->bat);
-fail:
-	return ret;
-}
-
-static int ds2781_battery_remove(struct platform_device *pdev)
-{
-	struct ds2781_device_info *dev_info = platform_get_drvdata(pdev);
-
-	/*
-	 * Remove attributes before unregistering power supply
-	 * because 'bat' will be freed on power_supply_unregister() call.
-	 */
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2781_attr_group);
-
-	power_supply_unregister(dev_info->bat);
 
 	return 0;
 }
···
 		.name = "ds2781-battery",
 	},
 	.probe	  = ds2781_battery_probe,
-	.remove   = ds2781_battery_remove,
 };
 module_platform_driver(ds2781_battery_driver);
 

drivers/power/supply/gpio-charger.c

···
 		if (!strcmp("usb-sdp", chargetype))
 			return POWER_SUPPLY_TYPE_USB;
 		if (!strcmp("usb-dcp", chargetype))
-			return POWER_SUPPLY_TYPE_USB_DCP;
+			return POWER_SUPPLY_TYPE_USB;
 		if (!strcmp("usb-cdp", chargetype))
-			return POWER_SUPPLY_TYPE_USB_CDP;
+			return POWER_SUPPLY_TYPE_USB;
 		if (!strcmp("usb-aca", chargetype))
-			return POWER_SUPPLY_TYPE_USB_ACA;
+			return POWER_SUPPLY_TYPE_USB;
 	}
 	dev_warn(dev, "unknown charger type %s\n", chargetype);
 

drivers/power/supply/lp8788-charger.c

···
 	.get_property	= lp8788_battery_get_property,
 };
 
-static int lp8788_psy_register(struct platform_device *pdev,
-				struct lp8788_charger *pchg)
-{
-	struct power_supply_config charger_cfg = {};
-
-	charger_cfg.supplied_to = battery_supplied_to;
-	charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
-
-	pchg->charger = power_supply_register(&pdev->dev,
-					      &lp8788_psy_charger_desc,
-					      &charger_cfg);
-	if (IS_ERR(pchg->charger))
-		return -EPERM;
-
-	pchg->battery = power_supply_register(&pdev->dev,
-					      &lp8788_psy_battery_desc, NULL);
-	if (IS_ERR(pchg->battery)) {
-		power_supply_unregister(pchg->charger);
-		return -EPERM;
-	}
-
-	return 0;
-}
-
 static void lp8788_psy_unregister(struct lp8788_charger *pchg)
 {
 	power_supply_unregister(pchg->battery);
···
 static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL);
 static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL);
 
-static struct attribute *lp8788_charger_attr[] = {
+static struct attribute *lp8788_charger_sysfs_attrs[] = {
 	&dev_attr_charger_status.attr,
 	&dev_attr_eoc_time.attr,
 	&dev_attr_eoc_level.attr,
 	NULL,
 };
 
-static const struct attribute_group lp8788_attr_group = {
-	.attrs = lp8788_charger_attr,
-};
+ATTRIBUTE_GROUPS(lp8788_charger_sysfs);
+
+static int lp8788_psy_register(struct platform_device *pdev,
+				struct lp8788_charger *pchg)
+{
+	struct power_supply_config charger_cfg = {};
+
+	charger_cfg.attr_grp = lp8788_charger_sysfs_groups;
+	charger_cfg.supplied_to = battery_supplied_to;
+	charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
+
+	pchg->charger = power_supply_register(&pdev->dev,
+					      &lp8788_psy_charger_desc,
+					      &charger_cfg);
+	if (IS_ERR(pchg->charger))
+		return -EPERM;
+
+	pchg->battery = power_supply_register(&pdev->dev,
+					      &lp8788_psy_battery_desc, NULL);
+	if (IS_ERR(pchg->battery)) {
+		power_supply_unregister(pchg->charger);
+		return -EPERM;
+	}
+
+	return 0;
+}
 
 static int lp8788_charger_probe(struct platform_device *pdev)
 {
···
 	if (ret)
 		return ret;
 
-	ret = sysfs_create_group(&pdev->dev.kobj, &lp8788_attr_group);
-	if (ret) {
-		lp8788_psy_unregister(pchg);
-		return ret;
-	}
-
 	ret = lp8788_irq_register(pdev, pchg);
 	if (ret)
 		dev_warn(dev, "failed to register charger irq: %d\n", ret);
···
 
 	flush_work(&pchg->charger_work);
 	lp8788_irq_unregister(pdev, pchg);
-	sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group);
 	lp8788_psy_unregister(pchg);
 	lp8788_release_adc_channel(pchg);
 

drivers/power/supply/olpc_battery.c

···
 		if (ret)
 			return ret;
 
-		val->intval = (s16)be16_to_cpu(ec_word) * 100 / 256;
+		val->intval = (s16)be16_to_cpu(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) * 100 / 256;
+		val->intval = (int)be16_to_cpu(ec_word) * 10 / 256;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 		ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);

drivers/power/supply/pcf50633-charger.c

···
  */
 static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim);
 
-static struct attribute *pcf50633_mbc_sysfs_entries[] = {
+static struct attribute *pcf50633_mbc_sysfs_attrs[] = {
 	&dev_attr_chgmode.attr,
 	&dev_attr_usb_curlim.attr,
 	&dev_attr_chg_curlim.attr,
 	NULL,
 };
 
-static const struct attribute_group mbc_attr_group = {
-	.name	= NULL,			/* put in device directory */
-	.attrs	= pcf50633_mbc_sysfs_entries,
-};
+ATTRIBUTE_GROUPS(pcf50633_mbc_sysfs);
 
 static void
 pcf50633_mbc_irq_handler(int irq, void *data)
···
 static int pcf50633_mbc_probe(struct platform_device *pdev)
 {
 	struct power_supply_config psy_cfg = {};
+	struct power_supply_config usb_psy_cfg;
 	struct pcf50633_mbc *mbc;
 	int i;
 	u8 mbcs1;
···
 		return PTR_ERR(mbc->adapter);
 	}
 
+	usb_psy_cfg = psy_cfg;
+	usb_psy_cfg.attr_grp = pcf50633_mbc_sysfs_groups;
+
 	mbc->usb = power_supply_register(&pdev->dev, &pcf50633_mbc_usb_desc,
-					 &psy_cfg);
+					 &usb_psy_cfg);
 	if (IS_ERR(mbc->usb)) {
 		dev_err(mbc->pcf->dev, "failed to register usb\n");
 		power_supply_unregister(mbc->adapter);
···
 		power_supply_unregister(mbc->usb);
 		return PTR_ERR(mbc->ac);
 	}
-
-	if (sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group))
-		dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
 
 	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
 	if (mbcs1 & PCF50633_MBCS1_USBPRES)
···
 	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
 		pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
 
-	sysfs_remove_group(&pdev->dev.kobj, &mbc_attr_group);
 	power_supply_unregister(mbc->usb);
 	power_supply_unregister(mbc->adapter);
 	power_supply_unregister(mbc->ac);

drivers/power/supply/power_supply_core.c

···
 {
 	struct device_node *battery_np;
 	const char *value;
-	int err;
+	int err, len, index;
 
 	info->energy_full_design_uwh         = -EINVAL;
 	info->charge_full_design_uah         = -EINVAL;
···
 	info->charge_term_current_ua         = -EINVAL;
 	info->constant_charge_current_max_ua = -EINVAL;
 	info->constant_charge_voltage_max_uv = -EINVAL;
+	info->factory_internal_resistance_uohm  = -EINVAL;
+
+	for (index = 0; index < POWER_SUPPLY_OCV_TEMP_MAX; index++) {
+		info->ocv_table[index]       = NULL;
+		info->ocv_temp[index]        = -EINVAL;
+		info->ocv_table_size[index]  = -EINVAL;
+	}
 
 	if (!psy->of_node) {
 		dev_warn(&psy->dev, "%s currently only supports devicetree\n",
···
 			     &info->constant_charge_current_max_ua);
 	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;
+	} else if (len > POWER_SUPPLY_OCV_TEMP_MAX) {
+		dev_err(&psy->dev, "Too many temperature values\n");
+		return -EINVAL;
+	} else if (len > 0) {
+		of_property_read_u32_array(battery_np, "ocv-capacity-celsius",
+					   info->ocv_temp, len);
+	}
+
+	for (index = 0; index < len; index++) {
+		struct power_supply_battery_ocv_table *table;
+		char *propname;
+		const __be32 *list;
+		int i, tab_len, size;
+
+		propname = kasprintf(GFP_KERNEL, "ocv-capacity-table-%d", index);
+		list = of_get_property(battery_np, propname, &size);
+		if (!list || !size) {
+			dev_err(&psy->dev, "failed to get %s\n", propname);
+			kfree(propname);
+			power_supply_put_battery_info(psy, info);
+			return -EINVAL;
+		}
+
+		kfree(propname);
+		tab_len = size / (2 * sizeof(__be32));
+		info->ocv_table_size[index] = tab_len;
+
+		table = info->ocv_table[index] =
+			devm_kcalloc(&psy->dev, tab_len, sizeof(*table), GFP_KERNEL);
+		if (!info->ocv_table[index]) {
+			power_supply_put_battery_info(psy, info);
+			return -ENOMEM;
+		}
+
+		for (i = 0; i < tab_len; i++) {
+			table[i].ocv = be32_to_cpu(*list++);
+			table[i].capacity = be32_to_cpu(*list++);
+		}
+	}
 
 	return 0;
 }
 EXPORT_SYMBOL_GPL(power_supply_get_battery_info);
+
+void power_supply_put_battery_info(struct power_supply *psy,
+				   struct power_supply_battery_info *info)
+{
+	int i;
+
+	for (i = 0; i < POWER_SUPPLY_OCV_TEMP_MAX; i++) {
+		if (info->ocv_table[i])
+			devm_kfree(&psy->dev, info->ocv_table[i]);
+	}
+}
+EXPORT_SYMBOL_GPL(power_supply_put_battery_info);
+
+/**
+ * power_supply_ocv2cap_simple() - find the battery capacity
+ * @table: Pointer to battery OCV lookup table
+ * @table_len: OCV table length
+ * @ocv: Current OCV value
+ *
+ * This helper function is used to look up battery capacity according to
+ * current OCV value from one OCV table, and the OCV table must be ordered
+ * descending.
+ *
+ * Return: the battery capacity.
+ */
+int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
+				int table_len, int ocv)
+{
+	int i, cap, tmp;
+
+	for (i = 0; i < table_len; i++)
+		if (ocv > table[i].ocv)
+			break;
+
+	if (i > 0 && i < table_len) {
+		tmp = (table[i - 1].capacity - table[i].capacity) *
+			(ocv - table[i].ocv);
+		tmp /= table[i - 1].ocv - table[i].ocv;
+		cap = tmp + table[i].capacity;
+	} else if (i == 0) {
+		cap = table[0].capacity;
+	} else {
+		cap = table[table_len - 1].capacity;
+	}
+
+	return cap;
+}
+EXPORT_SYMBOL_GPL(power_supply_ocv2cap_simple);
+
+struct power_supply_battery_ocv_table *
+power_supply_find_ocv2cap_table(struct power_supply_battery_info *info,
+				int temp, int *table_len)
+{
+	int best_temp_diff = INT_MAX, temp_diff;
+	u8 i, best_index = 0;
+
+	if (!info->ocv_table[0])
+		return NULL;
+
+	for (i = 0; i < POWER_SUPPLY_OCV_TEMP_MAX; i++) {
+		temp_diff = abs(info->ocv_temp[i] - temp);
+
+		if (temp_diff < best_temp_diff) {
+			best_temp_diff = temp_diff;
+			best_index = i;
+		}
+	}
+
+	*table_len = info->ocv_table_size[best_index];
+	return info->ocv_table[best_index];
+}
+EXPORT_SYMBOL_GPL(power_supply_find_ocv2cap_table);
+
+int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info,
+				 int ocv, int temp)
+{
+	struct power_supply_battery_ocv_table *table;
+	int table_len;
+
+	table = power_supply_find_ocv2cap_table(info, temp, &table_len);
+	if (!table)
+		return -EINVAL;
+
+	return power_supply_ocv2cap_simple(table, table_len, ocv);
+}
+EXPORT_SYMBOL_GPL(power_supply_batinfo_ocv2cap);
 
 int power_supply_get_property(struct power_supply *psy,
 			    enum power_supply_property psp,
···
 	dev_set_drvdata(dev, psy);
 	psy->desc = desc;
 	if (cfg) {
+		dev->groups = cfg->attr_grp;
 		psy->drv_data = cfg->drv_data;
 		psy->of_node =
 			cfg->fwnode ? to_of_node(cfg->fwnode) : cfg->of_node;

drivers/power/supply/sc2731_charger.c

···
 	struct usb_phy *usb_phy;
 	struct notifier_block usb_notify;
 	struct power_supply *psy_usb;
+	struct work_struct work;
 	struct mutex lock;
 	bool charging;
 	u32 base;
+	u32 limit;
 };
 
 static void sc2731_charger_stop_charge(struct sc2731_charger_info *info)
···
 	.property_is_writeable	= sc2731_charger_property_is_writeable,
 };
 
-static int sc2731_charger_usb_change(struct notifier_block *nb,
-				     unsigned long limit, void *data)
+static void sc2731_charger_work(struct work_struct *data)
 {
 	struct sc2731_charger_info *info =
-		container_of(nb, struct sc2731_charger_info, usb_notify);
-	int ret = 0;
+		container_of(data, struct sc2731_charger_info, work);
+	int ret;
 
 	mutex_lock(&info->lock);
 
-	if (limit > 0) {
+	if (info->limit > 0 && !info->charging) {
 		/* set current limitation and start to charge */
-		ret = sc2731_charger_set_current_limit(info, limit);
+		ret = sc2731_charger_set_current_limit(info, info->limit);
 		if (ret)
 			goto out;
 
-		ret = sc2731_charger_set_current(info, limit);
+		ret = sc2731_charger_set_current(info, info->limit);
 		if (ret)
 			goto out;
 
···
 			goto out;
 
 		info->charging = true;
-	} else {
+	} else if (!info->limit && info->charging) {
 		/* Stop charging */
 		info->charging = false;
 		sc2731_charger_stop_charge(info);
···
 
 out:
 	mutex_unlock(&info->lock);
-	return ret;
+}
+
+static int sc2731_charger_usb_change(struct notifier_block *nb,
+				     unsigned long limit, void *data)
+{
+	struct sc2731_charger_info *info =
+		container_of(nb, struct sc2731_charger_info, usb_notify);
+
+	info->limit = limit;
+
+	schedule_work(&info->work);
+
+	return NOTIFY_OK;
 }
 
 static int sc2731_charger_hw_init(struct sc2731_charger_info *info)
···
 			vol_val = (term_voltage - 4200) / 100;
 		else
 			vol_val = 0;
+
+		power_supply_put_battery_info(info->psy_usb, &bat_info);
 	}
 
 	/* Set charge termination current */
···
 	return ret;
 }
 
+static void sc2731_charger_detect_status(struct sc2731_charger_info *info)
+{
+	unsigned int min, max;
+
+	/*
+	 * If the USB charger status has been USB_CHARGER_PRESENT before
+	 * registering the notifier, we should start to charge with getting
+	 * the charge current.
+	 */
+	if (info->usb_phy->chg_state != USB_CHARGER_PRESENT)
+		return;
+
+	usb_phy_get_charger_current(info->usb_phy, &min, &max);
+	info->limit = min;
+
+	schedule_work(&info->work);
+}
+
 static int sc2731_charger_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
···
 
 	mutex_init(&info->lock);
 	info->dev = &pdev->dev;
+	INIT_WORK(&info->work, sc2731_charger_work);
 
 	info->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 	if (!info->regmap) {
···
 		dev_err(&pdev->dev, "failed to register notifier: %d\n", ret);
 		return ret;
 	}
+
+	sc2731_charger_detect_status(info);
 
 	return 0;
 }

drivers/power/supply/sc27xx_fuel_gauge.c

···
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Spreadtrum Communications Inc.
+
+#include <linux/gpio/consumer.h>
+#include <linux/iio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+/* PMIC global control registers definition */
+#define SC27XX_MODULE_EN0		0xc08
+#define SC27XX_CLK_EN0			0xc18
+#define SC27XX_FGU_EN			BIT(7)
+#define SC27XX_FGU_RTC_EN		BIT(6)
+
+/* FGU registers definition */
+#define SC27XX_FGU_START		0x0
+#define SC27XX_FGU_CONFIG		0x4
+#define SC27XX_FGU_ADC_CONFIG		0x8
+#define SC27XX_FGU_STATUS		0xc
+#define SC27XX_FGU_INT_EN		0x10
+#define SC27XX_FGU_INT_CLR		0x14
+#define SC27XX_FGU_INT_STS		0x1c
+#define SC27XX_FGU_VOLTAGE		0x20
+#define SC27XX_FGU_OCV			0x24
+#define SC27XX_FGU_POCV			0x28
+#define SC27XX_FGU_CURRENT		0x2c
+#define SC27XX_FGU_LOW_OVERLOAD		0x34
+#define SC27XX_FGU_CLBCNT_SETH		0x50
+#define SC27XX_FGU_CLBCNT_SETL		0x54
+#define SC27XX_FGU_CLBCNT_DELTH		0x58
+#define SC27XX_FGU_CLBCNT_DELTL		0x5c
+#define SC27XX_FGU_CLBCNT_VALH		0x68
+#define SC27XX_FGU_CLBCNT_VALL		0x6c
+#define SC27XX_FGU_CLBCNT_QMAXL		0x74
+#define SC27XX_FGU_USER_AREA_SET	0xa0
+#define SC27XX_FGU_USER_AREA_CLEAR	0xa4
+#define SC27XX_FGU_USER_AREA_STATUS	0xa8
+
+#define SC27XX_WRITE_SELCLB_EN		BIT(0)
+#define SC27XX_FGU_CLBCNT_MASK		GENMASK(15, 0)
+#define SC27XX_FGU_CLBCNT_SHIFT		16
+#define SC27XX_FGU_LOW_OVERLOAD_MASK	GENMASK(12, 0)
+
+#define SC27XX_FGU_INT_MASK		GENMASK(9, 0)
+#define SC27XX_FGU_LOW_OVERLOAD_INT	BIT(0)
+#define SC27XX_FGU_CLBCNT_DELTA_INT	BIT(2)
+
+#define SC27XX_FGU_MODE_AREA_MASK	GENMASK(15, 12)
+#define SC27XX_FGU_CAP_AREA_MASK	GENMASK(11, 0)
+#define SC27XX_FGU_MODE_AREA_SHIFT	12
+
+#define SC27XX_FGU_FIRST_POWERTON	GENMASK(3, 0)
+#define SC27XX_FGU_DEFAULT_CAP		GENMASK(11, 0)
+#define SC27XX_FGU_NORMAIL_POWERTON	0x5
+
+#define SC27XX_FGU_CUR_BASIC_ADC	8192
+#define SC27XX_FGU_SAMPLE_HZ		2
+
+/*
+ * struct sc27xx_fgu_data: describe the FGU device
+ * @regmap: regmap for register access
+ * @dev: platform device
+ * @battery: battery power supply
+ * @base: the base offset for the controller
+ * @lock: protect the structure
+ * @gpiod: GPIO for battery detection
+ * @channel: IIO channel to get battery temperature
+ * @internal_resist: the battery internal resistance in mOhm
+ * @total_cap: the total capacity of the battery in mAh
+ * @init_cap: the initial capacity of the battery in mAh
+ * @alarm_cap: the alarm capacity
+ * @init_clbcnt: the initial coulomb counter
+ * @max_volt: the maximum constant input voltage in millivolt
+ * @min_volt: the minimum drained battery voltage in microvolt
+ * @table_len: the capacity table length
+ * @cur_1000ma_adc: ADC value corresponding to 1000 mA
+ * @vol_1000mv_adc: ADC value corresponding to 1000 mV
+ * @cap_table: capacity table with corresponding ocv
+ */
+struct sc27xx_fgu_data {
+	struct regmap *regmap;
+	struct device *dev;
+	struct power_supply *battery;
+	u32 base;
+	struct mutex lock;
+	struct gpio_desc *gpiod;
+	struct iio_channel *channel;
+	bool bat_present;
+	int internal_resist;
+	int total_cap;
+	int init_cap;
+	int alarm_cap;
+	int init_clbcnt;
+	int max_volt;
+	int min_volt;
+	int table_len;
+	int cur_1000ma_adc;
+	int vol_1000mv_adc;
+	struct power_supply_battery_ocv_table *cap_table;
+};
+
+static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity);
+
+static const char * const sc27xx_charger_supply_name[] = {
+	"sc2731_charger",
+	"sc2720_charger",
+	"sc2721_charger",
+	"sc2723_charger",
+};
+
+static int sc27xx_fgu_adc_to_current(struct sc27xx_fgu_data *data, int adc)
+{
+	return DIV_ROUND_CLOSEST(adc * 1000, data->cur_1000ma_adc);
+}
+
+static int sc27xx_fgu_adc_to_voltage(struct sc27xx_fgu_data *data, int adc)
+{
+	return DIV_ROUND_CLOSEST(adc * 1000, data->vol_1000mv_adc);
+}
+
+static int sc27xx_fgu_voltage_to_adc(struct sc27xx_fgu_data *data, int vol)
+{
+	return DIV_ROUND_CLOSEST(vol * data->vol_1000mv_adc, 1000);
+}
+
+static bool sc27xx_fgu_is_first_poweron(struct sc27xx_fgu_data *data)
+{
+	int ret, status, cap, mode;
+
+	ret = regmap_read(data->regmap,
+			  data->base + SC27XX_FGU_USER_AREA_STATUS, &status);
+	if (ret)
+		return false;
+
+	/*
+	 * We use low 4 bits to save the last battery capacity and high 12 bits
+	 * to save the system boot mode.
+	 */
+	mode = (status & SC27XX_FGU_MODE_AREA_MASK) >> SC27XX_FGU_MODE_AREA_SHIFT;
+	cap = status & SC27XX_FGU_CAP_AREA_MASK;
+
+	/*
+	 * When FGU has been powered down, the user area registers became
+	 * default value (0xffff), which can be used to valid if the system is
+	 * first power on or not.
+	 */
+	if (mode == SC27XX_FGU_FIRST_POWERTON || cap == SC27XX_FGU_DEFAULT_CAP)
+		return true;
+
+	return false;
+}
+
+static int sc27xx_fgu_save_boot_mode(struct sc27xx_fgu_data *data,
+				     int boot_mode)
+{
+	int ret;
+
+	ret = regmap_update_bits(data->regmap,
+				 data->base + SC27XX_FGU_USER_AREA_CLEAR,
+				 SC27XX_FGU_MODE_AREA_MASK,
+				 SC27XX_FGU_MODE_AREA_MASK);
+	if (ret)
+		return ret;
+
+	return regmap_update_bits(data->regmap,
+				  data->base + SC27XX_FGU_USER_AREA_SET,
+				  SC27XX_FGU_MODE_AREA_MASK,
+				  boot_mode << SC27XX_FGU_MODE_AREA_SHIFT);
+}
+
+static int sc27xx_fgu_save_last_cap(struct sc27xx_fgu_data *data, int cap)
+{
+	int ret;
+
+	ret = regmap_update_bits(data->regmap,
+				 data->base + SC27XX_FGU_USER_AREA_CLEAR,
+				 SC27XX_FGU_CAP_AREA_MASK,
+				 SC27XX_FGU_CAP_AREA_MASK);
+	if (ret)
+		return ret;
+
+	return regmap_update_bits(data->regmap,
+				  data->base + SC27XX_FGU_USER_AREA_SET,
+				  SC27XX_FGU_CAP_AREA_MASK, cap);
+}
+
+static int sc27xx_fgu_read_last_cap(struct sc27xx_fgu_data *data, int *cap)
+{
+	int ret, value;
+
+	ret = regmap_read(data->regmap,
+			  data->base + SC27XX_FGU_USER_AREA_STATUS, &value);
+	if (ret)
+		return ret;
+
+	*cap = value & SC27XX_FGU_CAP_AREA_MASK;
+	return 0;
+}
+
+/*
+ * When system boots on, we can not read battery capacity from coulomb
+ * registers, since now the coulomb registers are invalid. So we should
+ * calculate the battery open circuit voltage, and get current battery
+ * capacity according to the capacity table.
+ */
+static int sc27xx_fgu_get_boot_capacity(struct sc27xx_fgu_data *data, int *cap)
+{
+	int volt, cur, oci, ocv, ret;
+	bool is_first_poweron = sc27xx_fgu_is_first_poweron(data);
+
+	/*
+	 * If system is not the first power on, we should use the last saved
+	 * battery capacity as the initial battery capacity. Otherwise we should
+	 * re-calculate the initial battery capacity.
+	 */
+	if (!is_first_poweron) {
+		ret = sc27xx_fgu_read_last_cap(data, cap);
+		if (ret)
+			return ret;
+
+		return sc27xx_fgu_save_boot_mode(data, SC27XX_FGU_NORMAIL_POWERTON);
+	}
+
+	/*
+	 * After system booting on, the SC27XX_FGU_CLBCNT_QMAXL register saved
+	 * the first sampled open circuit current.
+	 */
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_QMAXL,
+			  &cur);
+	if (ret)
+		return ret;
+
+	cur <<= 1;
+	oci = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC);
+
+	/*
+	 * Should get the OCV from SC27XX_FGU_POCV register at the system
+	 * beginning. It is ADC values reading from registers which need to
+	 * convert the corresponding voltage.
+	 */
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_POCV, &volt);
+	if (ret)
+		return ret;
+
+	volt = sc27xx_fgu_adc_to_voltage(data, volt);
+	ocv = volt * 1000 - oci * data->internal_resist;
+
+	/*
+	 * Parse the capacity table to look up the correct capacity percent
+	 * according to current battery's corresponding OCV values.
+	 */
+	*cap = power_supply_ocv2cap_simple(data->cap_table, data->table_len,
+					   ocv);
+
+	ret = sc27xx_fgu_save_last_cap(data, *cap);
+	if (ret)
+		return ret;
+
+	return sc27xx_fgu_save_boot_mode(data, SC27XX_FGU_NORMAIL_POWERTON);
+}
+
+static int sc27xx_fgu_set_clbcnt(struct sc27xx_fgu_data *data, int clbcnt)
+{
+	int ret;
+
+	clbcnt *= SC27XX_FGU_SAMPLE_HZ;
+
+	ret = regmap_update_bits(data->regmap,
+				 data->base + SC27XX_FGU_CLBCNT_SETL,
+				 SC27XX_FGU_CLBCNT_MASK, clbcnt);
+	if (ret)
+		return ret;
+
+	ret = regmap_update_bits(data->regmap,
+				 data->base + SC27XX_FGU_CLBCNT_SETH,
+				 SC27XX_FGU_CLBCNT_MASK,
+				 clbcnt >> SC27XX_FGU_CLBCNT_SHIFT);
+	if (ret)
+		return ret;
+
+	return regmap_update_bits(data->regmap, data->base + SC27XX_FGU_START,
+				 SC27XX_WRITE_SELCLB_EN,
+				 SC27XX_WRITE_SELCLB_EN);
+}
+
+static int sc27xx_fgu_get_clbcnt(struct sc27xx_fgu_data *data, int *clb_cnt)
+{
+	int ccl, cch, ret;
+
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_VALL,
+			  &ccl);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_VALH,
+			  &cch);
+	if (ret)
+		return ret;
+
+	*clb_cnt = ccl & SC27XX_FGU_CLBCNT_MASK;
+	*clb_cnt |= (cch & SC27XX_FGU_CLBCNT_MASK) << SC27XX_FGU_CLBCNT_SHIFT;
+	*clb_cnt /= SC27XX_FGU_SAMPLE_HZ;
+
+	return 0;
+}
+
+static int sc27xx_fgu_get_capacity(struct sc27xx_fgu_data *data, int *cap)
+{
+	int ret, cur_clbcnt, delta_clbcnt, delta_cap, temp;
+
+	/* Get current coulomb counters firstly */
+	ret = sc27xx_fgu_get_clbcnt(data, &cur_clbcnt);
+	if (ret)
+		return ret;
+
+	delta_clbcnt = cur_clbcnt - data->init_clbcnt;
+
+	/*
+	 * Convert coulomb counter to delta capacity (mAh), and set multiplier
+	 * as 100 to improve the precision.
+	 */
+	temp = DIV_ROUND_CLOSEST(delta_clbcnt, 360);
+	temp = sc27xx_fgu_adc_to_current(data, temp);
+
+	/*
+	 * Convert to capacity percent of the battery total capacity,
+	 * and multiplier is 100 too.
+	 */
+	delta_cap = DIV_ROUND_CLOSEST(temp * 100, data->total_cap);
+	*cap = delta_cap + data->init_cap;
+
+	return 0;
+}
+
+static int sc27xx_fgu_get_vbat_vol(struct sc27xx_fgu_data *data, int *val)
+{
+	int ret, vol;
+
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_VOLTAGE, &vol);
+	if (ret)
+		return ret;
+
+	/*
+	 * It is ADC values reading from registers which need to convert to
+	 * corresponding voltage values.
+	 */
+	*val = sc27xx_fgu_adc_to_voltage(data, vol);
+
+	return 0;
+}
+
+static int sc27xx_fgu_get_current(struct sc27xx_fgu_data *data, int *val)
+{
+	int ret, cur;
+
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CURRENT, &cur);
+	if (ret)
+		return ret;
+
+	/*
+	 * It is ADC values reading from registers which need to convert to
+	 * corresponding current values.
+	 */
+	*val = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC);
+
+	return 0;
+}
+
+static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data *data, int *val)
+{
+	int vol, cur, ret;
+
+	ret = sc27xx_fgu_get_vbat_vol(data, &vol);
+	if (ret)
+		return ret;
+
+	ret = sc27xx_fgu_get_current(data, &cur);
+	if (ret)
+		return ret;
+
+	/* Return the battery OCV in micro volts. */
+	*val = vol * 1000 - cur * data->internal_resist;
+
+	return 0;
+}
+
+static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp)
+{
+	return iio_read_channel_processed(data->channel, temp);
+}
+
+static int sc27xx_fgu_get_health(struct sc27xx_fgu_data *data, int *health)
+{
+	int ret, vol;
+
+	ret = sc27xx_fgu_get_vbat_vol(data, &vol);
+	if (ret)
+		return ret;
+
+	if (vol > data->max_volt)
+		*health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+	else
+		*health = POWER_SUPPLY_HEALTH_GOOD;
+
+	return 0;
+}
+
+static int sc27xx_fgu_get_status(struct sc27xx_fgu_data *data, int *status)
+{
+	union power_supply_propval val;
+	struct power_supply *psy;
+	int i, ret = -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(sc27xx_charger_supply_name); i++) {
+		psy = power_supply_get_by_name(sc27xx_charger_supply_name[i]);
+		if (!psy)
+			continue;
+
+		ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS,
+						&val);
+		power_supply_put(psy);
+		if (ret)
+			return ret;
+
+		*status = val.intval;
+	}
+
+	return ret;
+}
+
+static int sc27xx_fgu_get_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy);
+	int ret = 0;
+	int value;
+
+	mutex_lock(&data->lock);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = sc27xx_fgu_get_status(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value;
+		break;
+
+	case POWER_SUPPLY_PROP_HEALTH:
+		ret = sc27xx_fgu_get_health(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value;
+		break;
+
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = data->bat_present;
+		break;
+
+	case POWER_SUPPLY_PROP_TEMP:
+		ret = sc27xx_fgu_get_temp(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value;
+		break;
+
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+		break;
+
+	case POWER_SUPPLY_PROP_CAPACITY:
+		ret = sc27xx_fgu_get_capacity(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value;
+		break;
+
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = sc27xx_fgu_get_vbat_vol(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value * 1000;
+		break;
+
+	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
+		ret = sc27xx_fgu_get_vbat_ocv(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value;
+		break;
+
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		ret = sc27xx_fgu_get_current(data, &value);
+		if (ret)
+			goto error;
+
+		val->intval = value * 1000;
+		break;
+
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+error:
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+static int sc27xx_fgu_set_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   const union power_supply_propval *val)
+{
+	struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy);
+	int ret;
+
+	if (psp != POWER_SUPPLY_PROP_CAPACITY)
+		return -EINVAL;
+
+	mutex_lock(&data->lock);
+
+	ret = sc27xx_fgu_save_last_cap(data, val->intval);
+
+	mutex_unlock(&data->lock);
+
+	if (ret < 0)
+		dev_err(data->dev, "failed to save battery capacity\n");
+
+	return ret;
+}
+
+static void sc27xx_fgu_external_power_changed(struct power_supply *psy)
+{
+	struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy);
+
+	power_supply_changed(data->battery);
+}
+
+static int sc27xx_fgu_property_is_writeable(struct power_supply *psy,
+					    enum power_supply_property psp)
+{
+	return psp == POWER_SUPPLY_PROP_CAPACITY;
+}
+
+static enum power_supply_property sc27xx_fgu_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_OCV,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+};
+
+static const struct power_supply_desc sc27xx_fgu_desc = {
+	.name			= "sc27xx-fgu",
+	.type			= POWER_SUPPLY_TYPE_BATTERY,
+	.properties		= sc27xx_fgu_props,
+	.num_properties		= ARRAY_SIZE(sc27xx_fgu_props),
+	.get_property		= sc27xx_fgu_get_property,
+	.set_property		= sc27xx_fgu_set_property,
+	.external_power_changed	= sc27xx_fgu_external_power_changed,
+	.property_is_writeable	= sc27xx_fgu_property_is_writeable,
+};
+
+static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap)
+{
+	data->init_cap = cap;
+	data->init_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, data->init_cap);
+}
+
+static irqreturn_t sc27xx_fgu_interrupt(int irq, void *dev_id)
+{
+	struct sc27xx_fgu_data *data = dev_id;
+	int ret, cap, ocv, adc;
+	u32 status;
+
+	mutex_lock(&data->lock);
+
+	ret = regmap_read(data->regmap, data->base + SC27XX_FGU_INT_STS,
+			  &status);
+	if (ret)
+		goto out;
+
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_CLR,
+				 status, status);
+	if (ret)
+		goto out;
+
+	/*
+	 * When low overload voltage interrupt happens, we should calibrate the
+	 * battery capacity in lower voltage stage.
+	 */
+	if (!(status & SC27XX_FGU_LOW_OVERLOAD_INT))
+		goto out;
+
+	ret = sc27xx_fgu_get_capacity(data, &cap);
+	if (ret)
+		goto out;
+
+	ret = sc27xx_fgu_get_vbat_ocv(data, &ocv);
+	if (ret)
+		goto out;
+
+	/*
+	 * If current OCV value is less than the minimum OCV value in OCV table,
+	 * which means now battery capacity is 0%, and we should adjust the
+	 * inititial capacity to 0.
+	 */
+	if (ocv <= data->cap_table[data->table_len - 1].ocv) {
+		sc27xx_fgu_adjust_cap(data, 0);
+	} else if (ocv <= data->min_volt) {
+		/*
+		 * If current OCV value is less than the low alarm voltage, but
+		 * current capacity is larger than the alarm capacity, we should
+		 * adjust the inititial capacity to alarm capacity.
+		 */
+		if (cap > data->alarm_cap) {
+			sc27xx_fgu_adjust_cap(data, data->alarm_cap);
+		} else if (cap <= 0) {
+			int cur_cap;
+
+			/*
+			 * If current capacity is equal with 0 or less than 0
+			 * (some error occurs), we should adjust inititial
+			 * capacity to the capacity corresponding to current OCV
+			 * value.
+			 */
+			cur_cap = power_supply_ocv2cap_simple(data->cap_table,
+							      data->table_len,
+							      ocv);
+			sc27xx_fgu_adjust_cap(data, cur_cap);
+		}
+
+		/*
+		 * After adjusting the battery capacity, we should set the
+		 * lowest alarm voltage instead.
+		 */
+		data->min_volt = data->cap_table[data->table_len - 1].ocv;
+		adc = sc27xx_fgu_voltage_to_adc(data, data->min_volt / 1000);
+		regmap_update_bits(data->regmap, data->base + SC27XX_FGU_LOW_OVERLOAD,
+				   SC27XX_FGU_LOW_OVERLOAD_MASK, adc);
+	}
+
+out:
+	mutex_unlock(&data->lock);
+
+	power_supply_changed(data->battery);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t sc27xx_fgu_bat_detection(int irq, void *dev_id)
+{
+	struct sc27xx_fgu_data *data = dev_id;
+	int state;
+
+	mutex_lock(&data->lock);
+
+	state = gpiod_get_value_cansleep(data->gpiod);
+	if (state < 0) {
+		dev_err(data->dev, "failed to get gpio state\n");
+		mutex_unlock(&data->lock);
+		return IRQ_RETVAL(state);
+	}
+
+	data->bat_present = !!state;
+
+	mutex_unlock(&data->lock);
+
+	power_supply_changed(data->battery);
+	return IRQ_HANDLED;
+}
+
+static void sc27xx_fgu_disable(void *_data)
+{
+	struct sc27xx_fgu_data *data = _data;
+
+	regmap_update_bits(data->regmap, SC27XX_CLK_EN0, SC27XX_FGU_RTC_EN, 0);
+	regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, SC27XX_FGU_EN, 0);
+}
+
+static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity)
+{
+	/*
+	 * Get current capacity (mAh) = battery total capacity (mAh) *
+	 * current capacity percent (capacity / 100).
+	 */
+	int cur_cap = DIV_ROUND_CLOSEST(data->total_cap * capacity, 100);
+
+	/*
+	 * Convert current capacity (mAh) to coulomb counter according to the
+	 * formula: 1 mAh =3.6 coulomb.
+	 */
+	return DIV_ROUND_CLOSEST(cur_cap * 36, 10);
+}
+
+static int sc27xx_fgu_calibration(struct sc27xx_fgu_data *data)
+{
+	struct nvmem_cell *cell;
+	int calib_data, cal_4200mv;
+	void *buf;
+	size_t len;
+
+	cell = nvmem_cell_get(data->dev, "fgu_calib");
+	if (IS_ERR(cell))
+		return PTR_ERR(cell);
+
+	buf = nvmem_cell_read(cell, &len);
+	nvmem_cell_put(cell);
+
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
+	memcpy(&calib_data, buf, min(len, sizeof(u32)));
+
+	/*
+	 * Get the ADC value corresponding to 4200 mV from eFuse controller
+	 * according to below formula. Then convert to ADC values corresponding
+	 * to 1000 mV and 1000 mA.
+	 */
+	cal_4200mv = (calib_data & 0x1ff) + 6963 - 4096 - 256;
+	data->vol_1000mv_adc = DIV_ROUND_CLOSEST(cal_4200mv * 10, 42);
+	data->cur_1000ma_adc = data->vol_1000mv_adc * 4;
+
+	kfree(buf);
+	return 0;
+}
+
+static int sc27xx_fgu_hw_init(struct sc27xx_fgu_data *data)
+{
+	struct power_supply_battery_info info = { };
+	struct power_supply_battery_ocv_table *table;
+	int ret, delta_clbcnt, alarm_adc;
+
+	ret = power_supply_get_battery_info(data->battery, &info);
+	if (ret) {
+		dev_err(data->dev, "failed to get battery information\n");
+		return ret;
+	}
+
+	data->total_cap = info.charge_full_design_uah / 1000;
+	data->max_volt = info.constant_charge_voltage_max_uv / 1000;
+	data->internal_resist = info.factory_internal_resistance_uohm / 1000;
+	data->min_volt = info.voltage_min_design_uv;
+
+	/*
+	 * For SC27XX fuel gauge device, we only use one ocv-capacity
+	 * table in normal temperature 20 Celsius.
+	 */
+	table = power_supply_find_ocv2cap_table(&info, 20, &data->table_len);
+	if (!table)
+		return -EINVAL;
+
+	data->cap_table = devm_kmemdup(data->dev, table,
+				       data->table_len * sizeof(*table),
+				       GFP_KERNEL);
+	if (!data->cap_table) {
+		power_supply_put_battery_info(data->battery, &info);
+		return -ENOMEM;
+	}
+
+	data->alarm_cap = power_supply_ocv2cap_simple(data->cap_table,
+						      data->table_len,
+						      data->min_volt);
+
+	power_supply_put_battery_info(data->battery, &info);
+
+	ret = sc27xx_fgu_calibration(data);
+	if (ret)
+		return ret;
+
+	/* Enable the FGU module */
+	ret = regmap_update_bits(data->regmap, SC27XX_MODULE_EN0,
+				 SC27XX_FGU_EN, SC27XX_FGU_EN);
+	if (ret) {
+		dev_err(data->dev, "failed to enable fgu\n");
+		return ret;
+	}
+
+	/* Enable the FGU RTC clock to make it work */
+	ret = regmap_update_bits(data->regmap, SC27XX_CLK_EN0,
+				 SC27XX_FGU_RTC_EN, SC27XX_FGU_RTC_EN);
+	if (ret) {
+		dev_err(data->dev, "failed to enable fgu RTC clock\n");
+		goto disable_fgu;
+	}
+
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_CLR,
+				 SC27XX_FGU_INT_MASK, SC27XX_FGU_INT_MASK);
+	if (ret) {
+		dev_err(data->dev, "failed to clear interrupt status\n");
+		goto disable_clk;
+	}
+
+	/*
+	 * Set the voltage low overload threshold, which means when the battery
+	 * voltage is lower than this threshold, the controller will generate
+	 * one interrupt to notify.
+	 */
+	alarm_adc = sc27xx_fgu_voltage_to_adc(data, data->min_volt / 1000);
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_LOW_OVERLOAD,
+				 SC27XX_FGU_LOW_OVERLOAD_MASK, alarm_adc);
+	if (ret) {
+		dev_err(data->dev, "failed to set fgu low overload\n");
+		goto disable_clk;
+	}
+
+	/*
+	 * Set the coulomb counter delta threshold, that means when the coulomb
+	 * counter change is multiples of the delta threshold, the controller
+	 * will generate one interrupt to notify the users to update the battery
+	 * capacity. Now we set the delta threshold as a counter value of 1%
+	 * capacity.
+	 */
+	delta_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, 1);
+
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_CLBCNT_DELTL,
+				 SC27XX_FGU_CLBCNT_MASK, delta_clbcnt);
+	if (ret) {
+		dev_err(data->dev, "failed to set low delta coulomb counter\n");
+		goto disable_clk;
+	}
+
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_CLBCNT_DELTH,
+				 SC27XX_FGU_CLBCNT_MASK,
+				 delta_clbcnt >> SC27XX_FGU_CLBCNT_SHIFT);
+	if (ret) {
+		dev_err(data->dev, "failed to set high delta coulomb counter\n");
+		goto disable_clk;
+	}
+
+	/*
+	 * Get the boot battery capacity when system powers on, which is used to
+	 * initialize the coulomb counter. After that, we can read the coulomb
+	 * counter to measure the battery capacity.
+	 */
+	ret = sc27xx_fgu_get_boot_capacity(data, &data->init_cap);
+	if (ret) {
+		dev_err(data->dev, "failed to get boot capacity\n");
+		goto disable_clk;
+	}
+
+	/*
+	 * Convert battery capacity to the corresponding initial coulomb counter
+	 * and set into coulomb counter registers.
+	 */
+	data->init_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, data->init_cap);
+	ret = sc27xx_fgu_set_clbcnt(data, data->init_clbcnt);
+	if (ret) {
+		dev_err(data->dev, "failed to initialize coulomb counter\n");
+		goto disable_clk;
+	}
+
+	return 0;
+
+disable_clk:
+	regmap_update_bits(data->regmap, SC27XX_CLK_EN0, SC27XX_FGU_RTC_EN, 0);
+disable_fgu:
+	regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, SC27XX_FGU_EN, 0);
+
+	return ret;
+}
+
+static int sc27xx_fgu_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct power_supply_config fgu_cfg = { };
+	struct sc27xx_fgu_data *data;
+	int ret, irq;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!data->regmap) {
+		dev_err(&pdev->dev, "failed to get regmap\n");
+		return -ENODEV;
+	}
+
+	ret = device_property_read_u32(&pdev->dev, "reg", &data->base);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get fgu address\n");
+		return ret;
+	}
+
+	data->channel = devm_iio_channel_get(&pdev->dev, "bat-temp");
+	if (IS_ERR(data->channel)) {
+		dev_err(&pdev->dev, "failed to get IIO channel\n");
+		return PTR_ERR(data->channel);
+	}
+
+	data->gpiod = devm_gpiod_get(&pdev->dev, "bat-detect", GPIOD_IN);
+	if (IS_ERR(data->gpiod)) {
+		dev_err(&pdev->dev, "failed to get battery detection GPIO\n");
+		return PTR_ERR(data->gpiod);
+	}
+
+	ret = gpiod_get_value_cansleep(data->gpiod);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to get gpio state\n");
+		return ret;
+	}
+
+	data->bat_present = !!ret;
+	mutex_init(&data->lock);
+	data->dev = &pdev->dev;
+	platform_set_drvdata(pdev, data);
+
+	fgu_cfg.drv_data = data;
+	fgu_cfg.of_node = np;
+	data->battery = devm_power_supply_register(&pdev->dev, &sc27xx_fgu_desc,
+						   &fgu_cfg);
+	if (IS_ERR(data->battery)) {
+		dev_err(&pdev->dev, "failed to register power supply\n");
+		return PTR_ERR(data->battery);
+	}
+
+	ret = sc27xx_fgu_hw_init(data);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to initialize fgu hardware\n");
+		return ret;
+	}
+
+	ret = devm_add_action(&pdev->dev, sc27xx_fgu_disable, data);
+	if (ret) {
+		sc27xx_fgu_disable(data);
+		dev_err(&pdev->dev, "failed to add fgu disable action\n");
+		return ret;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "no irq resource specified\n");
+		return irq;
+	}
+
+	ret = devm_request_threaded_irq(data->dev, irq, NULL,
+					sc27xx_fgu_interrupt,
+					IRQF_NO_SUSPEND | IRQF_ONESHOT,
+					pdev->name, data);
+	if (ret) {
+		dev_err(data->dev, "failed to request fgu IRQ\n");
+		return ret;
+	}
+
+	irq = gpiod_to_irq(data->gpiod);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "failed to translate GPIO to IRQ\n");
+		return irq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					sc27xx_fgu_bat_detection,
+					IRQF_ONESHOT | IRQF_TRIGGER_RISING |
+					IRQF_TRIGGER_FALLING,
+					pdev->name, data);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to request IRQ\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sc27xx_fgu_resume(struct device *dev)
+{
+	struct sc27xx_fgu_data *data = dev_get_drvdata(dev);
+	int ret;
+
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
+				 SC27XX_FGU_LOW_OVERLOAD_INT |
+				 SC27XX_FGU_CLBCNT_DELTA_INT, 0);
+	if (ret) {
+		dev_err(data->dev, "failed to disable fgu interrupts\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int sc27xx_fgu_suspend(struct device *dev)
+{
+	struct sc27xx_fgu_data *data = dev_get_drvdata(dev);
+	int ret, status, ocv;
+
+	ret = sc27xx_fgu_get_status(data, &status);
+	if (ret)
+		return ret;
+
+	/*
+	 * If we are charging, then no need to enable the FGU interrupts to
+	 * adjust the battery capacity.
+	 */
+	if (status != POWER_SUPPLY_STATUS_NOT_CHARGING)
+		return 0;
+
+	ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
+				 SC27XX_FGU_LOW_OVERLOAD_INT,
+				 SC27XX_FGU_LOW_OVERLOAD_INT);
+	if (ret) {
+		dev_err(data->dev, "failed to enable low voltage interrupt\n");
+		return ret;
+	}
+
+	ret = sc27xx_fgu_get_vbat_ocv(data, &ocv);
+	if (ret)
+		goto disable_int;
+
+	/*
+	 * If current OCV is less than the minimum voltage, we should enable the
+	 * coulomb counter threshold interrupt to notify events to adjust the
+	 * battery capacity.
+	 */
+	if (ocv < data->min_volt) {
+		ret = regmap_update_bits(data->regmap,
+					 data->base + SC27XX_FGU_INT_EN,
+					 SC27XX_FGU_CLBCNT_DELTA_INT,
+					 SC27XX_FGU_CLBCNT_DELTA_INT);
+		if (ret) {
+			dev_err(data->dev,
+				"failed to enable coulomb threshold int\n");
+			goto disable_int;
+		}
+	}
+
+	return 0;
+
+disable_int:
+	regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
+			   SC27XX_FGU_LOW_OVERLOAD_INT, 0);
+	return ret;
+}
+#endif
+
+static const struct dev_pm_ops sc27xx_fgu_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(sc27xx_fgu_suspend, sc27xx_fgu_resume)
+};
+
+static const struct of_device_id sc27xx_fgu_of_match[] = {
+	{ .compatible = "sprd,sc2731-fgu", },
+	{ }
+};
+
+static struct platform_driver sc27xx_fgu_driver = {
+	.probe = sc27xx_fgu_probe,
+	.driver = {
+		.name = "sc27xx-fgu",
+		.of_match_table = sc27xx_fgu_of_match,
+		.pm = &sc27xx_fgu_pm_ops,
+	}
+};
+
+module_platform_driver(sc27xx_fgu_driver);
+
+MODULE_DESCRIPTION("Spreadtrum SC27XX PMICs Fual Gauge Unit Driver");
+MODULE_LICENSE("GPL v2");

include/linux/mfd/axp20x.h

···
 #define AXP288_RT_BATT_V_H		0xa0
 #define AXP288_RT_BATT_V_L		0xa1
 
+#define AXP813_ACIN_PATH_CTRL		0x3a
 #define AXP813_ADC_RATE			0x85
 
 /* Fuel Gauge */

include/linux/power/charger-manager.h

···
 	struct charger_cable *cables;
 	int num_cables;
 
-	struct attribute_group attr_g;
+	struct attribute_group attr_grp;
 	struct device_attribute attr_name;
 	struct device_attribute attr_state;
 	struct device_attribute attr_externally_control;
···
 
 	int num_charger_regulators;
 	struct charger_regulator *charger_regulators;
+	const struct attribute_group **sysfs_groups;
 
 	const char *psy_fuel_gauge;
 

include/linux/power_supply.h

···
 	/* Driver private data */
 	void *drv_data;
 
+	/* Device specific sysfs attributes */
+	const struct attribute_group **attr_grp;
+
 	char **supplied_to;
 	size_t num_supplicants;
 };
···
 	int use_for_apm;
 };
 
+struct power_supply_battery_ocv_table {
+	int ocv;	/* microVolts */
+	int capacity;	/* percent */
+};
+
+#define POWER_SUPPLY_OCV_TEMP_MAX 20
+
 /*
  * This is the recommended struct to manage static battery parameters,
  * populated by power_supply_get_battery_info(). Most platform drivers should
···
 	int charge_term_current_ua;	    /* microAmps */
 	int constant_charge_current_max_ua; /* microAmps */
 	int constant_charge_voltage_max_uv; /* microVolts */
+	int factory_internal_resistance_uohm;   /* microOhms */
+	int ocv_temp[POWER_SUPPLY_OCV_TEMP_MAX];/* celsius */
+	struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX];
+	int ocv_table_size[POWER_SUPPLY_OCV_TEMP_MAX];
 };
 
 extern struct atomic_notifier_head power_supply_notifier;
···
 
 extern int power_supply_get_battery_info(struct power_supply *psy,
 					 struct power_supply_battery_info *info);
+extern void power_supply_put_battery_info(struct power_supply *psy,
+					  struct power_supply_battery_info *info);
+extern int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
+				       int table_len, int ocv);
+extern struct power_supply_battery_ocv_table *
+power_supply_find_ocv2cap_table(struct power_supply_battery_info *info,
+				int temp, int *table_len);
+extern int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info,
+					int ocv, int temp);
 extern void power_supply_changed(struct power_supply *psy);
 extern int power_supply_am_i_supplied(struct power_supply *psy);
 extern int power_supply_set_input_current_limit_from_supplier(