Merge tag 'for-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:
"Nothing special for the power-supply subystem this time.

- power-supply core: remove faulty cooling logic

- convert all sysfs show() handlers from *printf() use sysfs_emit()

- bq25890: add dual-charger support required by Lenovo Yoga Tab 3 Pro

- bq27xxx: fix reporting critical level

- syscon-reboot: add priority property support

- new rt9467 charger driver

- new rt9471 charger driver

- new Odroid Go Ultra poweroff driver

- misc minor fixes and cleanups"

* tag 'for-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (32 commits)
power: reset: odroid-go-ultra: fix I2C dependency
power: supply: leds: explicitly include linux/leds.h
dt-bindings: power: supply: pm8941-coincell: Don't require charging properties
dt-bindings: power: supply: pm8941-coincell: Add PM8998 compatible
power: reset: add Odroid Go Ultra poweroff driver
power: supply: rt9467: Fix spelling mistake "attache" -> "attach"
power: supply: rt9471: fix using wrong ce_gpio in rt9471_probe()
power: supply: max77650: Make max77650_charger_disable() return void
Documentation: power: rt9467: Document exported sysfs entries
power: supply: rt9467: Add Richtek RT9467 charger driver
dt-bindings: power: supply: Add Richtek RT9467 battery charger
Documentation: power: rt9471: Document exported sysfs entries
power: supply: rt9471: Add Richtek RT9471 charger driver
dt-bindings: power: supply: Add Richtek RT9471 battery charger
power: supply: max1721x: Use strscpy() is more robust and safer
power: supply: test-power: use strscpy() instead of strncpy()
power: supply: bq27xxx: fix reporting critical level
power: supply: bq256xx: Init ichg/vbat value with chip default value
power: supply: collie_battery: Convert to GPIO descriptors (part 2)
power: supply: remove faulty cooling logic
...

Documentation/ABI/testing/sysfs-class-power-rt9467

···
+What:		/sys/class/power_supply/rt9467-*/sysoff_enable
+Date:		Feb 2023
+KernelVersion:	6.3
+Contact:	ChiaEn Wu <[e-mail]>
+Description:
+		This entry allows enabling the sysoff mode of rt9467 charger
+		devices.
+		If enabled and the input is removed, the internal battery FET
+		is turned off to reduce the leakage from the BAT pin. See
+		device datasheet for details. It's commonly used when the
+		product enter shipping stage. After entering shipping mode,
+		only 'VBUS' or 'Power key" pressed can make it leave this mode.
+		'Disable' also can help to leave it, but it's more like to
+		abort the action before the device really enter shipping mode.
+
+		Access: Read, Write
+		Valid values:
+		- 1: enabled
+		- 0: disabled

Documentation/ABI/testing/sysfs-class-power-rt9471

···
+What:		/sys/class/power_supply/rt9471-*/sysoff_enable
+Date:		Feb 2023
+KernelVersion:	6.3
+Contact:	ChiYuan Huang <[e-mail]>
+Description:
+		This entry allows enabling the sysoff mode of rt9471 charger devices.
+		If enabled and the input is removed, the internal battery FET is turned
+		off to reduce the leakage from the BAT pin. See device datasheet for details.
+		It's commonly used when the product enter shipping stage. After entering
+		shipping mode, only 'VBUS' or 'Power key" pressed can make it leave this
+		mode. 'Disable' also can help to leave it, but it's more like to abort
+		the action before the device really enter shipping mode.
+
+		Access: Read, Write
+		Valid values:
+		- 1: enabled
+		- 0: disabled
+
+What:		/sys/class/power_supply/rt9471-*/port_detect_enable
+Date:		Feb 2023
+KernelVersion:	6.3
+Contact:	ChiYuan Huang <[e-mail]>
+Description:
+		This entry allows enabling the USB BC12 port detect function of rt9471 charger
+		devices. If enabled and VBUS is inserted, device will start to do the BC12
+		port detect and report the usb port type when port detect is done. See
+		datasheet for details. Normally controlled when TypeC/USBPD port integrated.
+
+		Access: Read, Write
+		Valid values:
+		- 1: enabled
+		- 0: disabled

Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml

···
     $ref: /schemas/types.yaml#/definitions/uint32
     description: The reset value written to the reboot register (32 bit access).
 
+  priority:
+    default: 192
+
 required:
   - compatible
   - offset
···
 additionalProperties: false
 
 allOf:
+  - $ref: restart-handler.yaml#
   - if:
       not:
         required:

Documentation/devicetree/bindings/power/supply/qcom,pm8941-coincell.yaml

···
 
 properties:
   compatible:
-    const: qcom,pm8941-coincell
+    oneOf:
+      - items:
+          - enum:
+              - qcom,pm8998-coincell
+          - const: qcom,pm8941-coincell
+
+      - const: qcom,pm8941-coincell
 
   reg:
     maxItems: 1
 
   qcom,rset-ohms:
-    description: resistance (in ohms) for current-limiting resistor
+    description: |
+      Resistance (in ohms) for current-limiting resistor. If unspecified,
+      inherit the previous configuration (e.g. from bootloader or hardware
+      default value).
     enum: [ 800, 1200, 1700, 2100 ]
 
   qcom,vset-millivolts:
     $ref: /schemas/types.yaml#/definitions/uint32
-    description: voltage (in millivolts) to apply for charging
+    description: |
+      Voltage (in millivolts) to apply for charging. If unspecified, inherit
+      the previous configuration (e.g. from bootloader or hardware default
+      value).
     enum: [ 2500, 3000, 3100, 3200 ]
 
   qcom,charger-disable:
···
 required:
   - compatible
   - reg
-  - qcom,rset-ohms
-  - qcom,vset-millivolts
 
 additionalProperties: false
 

Documentation/devicetree/bindings/power/supply/richtek,rt9467-charger.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/richtek,rt9467-charger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT9467 Switching Battery Charger with Power Path Management
+
+maintainers:
+  - ChiYuan Huang <[e-mail]>
+  - ChiaEn Wu <[e-mail]>
+
+description: |
+  RT9467 is a switch-mode single cell Li-Ion/Li-Polymer battery charger for
+  portable applications. It integrates a synchronous PWM controller, power
+  MOSFETs, input current sensing and regulation, high-accuracy voltage
+  regulation, and charge termination. The charge current is regulated through
+  integrated sensing resistors.
+
+  The RT9467 also features USB On-The-Go (OTG) support. It also integrates
+  D+/D- pin for USB host/charging port detection.
+
+  Datasheet is available at
+  https://www.richtek.com/assets/product_file/RT9467/DS9467-01.pdf
+
+properties:
+  compatible:
+    const: richtek,rt9467-charger
+
+  reg:
+    maxItems: 1
+
+  wakeup-source: true
+
+  interrupts:
+    maxItems: 1
+
+  charge-enable-gpios:
+    description: GPIO is used to turn on and off charging.
+    maxItems: 1
+
+  usb-otg-vbus-regulator:
+    type: object
+    description: OTG boost regulator.
+    unevaluatedProperties: false
+    $ref: /schemas/regulator/regulator.yaml#
+
+    properties:
+      enable-gpios: true
+
+required:
+  - compatible
+  - reg
+  - wakeup-source
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      charger@5b {
+        compatible = "richtek,rt9467-charger";
+        reg = <0x5b>;
+        wakeup-source;
+        interrupts-extended = <&gpio_intc 32 IRQ_TYPE_LEVEL_LOW>;
+        charge-enable-gpios = <&gpio26 1 GPIO_ACTIVE_LOW>;
+
+        rt9467_otg_vbus: usb-otg-vbus-regulator {
+          regulator-name = "rt9467-usb-otg-vbus";
+          regulator-min-microvolt = <4425000>;
+          regulator-max-microvolt = <5825000>;
+          regulator-min-microamp = <500000>;
+          regulator-max-microamp = <3000000>;
+        };
+      };
+    };

Documentation/devicetree/bindings/power/supply/richtek,rt9471.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/richtek,rt9471.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT9471 3A Single Cell Switching Battery charger
+
+maintainers:
+  - Alina Yu <[e-mail]>
+  - ChiYuan Huang <[e-mail]>
+
+description: |
+  RT9471 is a switch-mode single cell Li-Ion/Li-Polymer battery charger for
+  portable applications. It supports USB BC1.2 port detection, current and
+  voltage regulations in both charging and boost mode.
+
+  Datasheet is available at
+  https://www.richtek.com/assets/product_file/RT9471=RT9471D/DS9471D-02.pdf
+
+properties:
+  compatible:
+    const: richtek,rt9471
+
+  reg:
+    maxItems: 1
+
+  charge-enable-gpios:
+    description: GPIO used to turn on and off charging.
+    maxItems: 1
+
+  wakeup-source: true
+
+  interrupts:
+    maxItems: 1
+
+  usb-otg-vbus-regulator:
+    type: object
+    $ref: /schemas/regulator/regulator.yaml#
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - wakeup-source
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      charger@53 {
+        compatible = "richtek,rt9471";
+        reg = <0x53>;
+        charge-enable-gpios = <&gpio26 1 GPIO_ACTIVE_LOW>;
+        wakeup-source;
+        interrupts-extended = <&gpio_intc 32 IRQ_TYPE_EDGE_FALLING>;
+
+        usb-otg-vbus-regulator {
+          regulator-name = "usb-otg-vbus";
+          regulator-min-microvolt = <4850000>;
+          regulator-max-microvolt = <5300000>;
+          regulator-min-microamp = <500000>;
+          regulator-max-microamp = <1200000>;
+        };
+      };
+    };

drivers/platform/x86/x86-android-tablets.c

···
 /* Generic / shared charger / battery settings */
 static const char * const tusb1211_chg_det_psy[] = { "tusb1211-charger-detect" };
 static const char * const bq24190_psy[] = { "bq24190-charger" };
-static const char * const bq25890_psy[] = { "bq25890-charger" };
+static const char * const bq25890_psy[] = { "bq25890-charger-0" };
 
 static const struct property_entry fg_bq24190_supply_props[] = {
 	PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq24190_psy),

drivers/power/reset/Kconfig

···
 	help
 	  This driver supports restart for Microsemi Ocelot SoC and similar.
 
+config POWER_RESET_ODROID_GO_ULTRA_POWEROFF
+	bool "Odroid Go Ultra power-off driver"
+	depends on ARCH_MESON || COMPILE_TEST
+	depends on I2C=y && OF
+	help
+	  This driver supports Power off for Odroid Go Ultra device.
+
 config POWER_RESET_OXNAS
 	bool "OXNAS SoC restart driver"
 	depends on ARCH_OXNAS

drivers/power/reset/Makefile

···
 obj-$(CONFIG_POWER_RESET_OXNAS) += oxnas-restart.o
 obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
 obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
+obj-$(CONFIG_POWER_RESET_ODROID_GO_ULTRA_POWEROFF) += odroid-go-ultra-poweroff.o
 obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o
 obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
 obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o

drivers/power/reset/odroid-go-ultra-poweroff.c

···
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2023 Neil Armstrong <[e-mail]>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/mfd/rk808.h>
+#include <linux/regmap.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/i2c.h>
+
+/*
+ * The Odroid Go Ultra has 2 PMICs:
+ * - RK818 (manages the battery and USB-C power supply)
+ * - RK817
+ * Both PMICs feeds power to the S922X SoC, so they must be powered-off in sequence.
+ * Vendor does power-off the RK817 first, then the RK818 so here we follow this sequence.
+ */
+
+struct odroid_go_ultra_poweroff_data {
+	struct device *dev;
+	struct device *rk817;
+	struct device *rk818;
+};
+
+static int odroid_go_ultra_poweroff_prepare(struct sys_off_data *data)
+{
+	struct odroid_go_ultra_poweroff_data *poweroff_data = data->cb_data;
+	struct regmap *rk817, *rk818;
+	int ret;
+
+	/* RK817 Regmap */
+	rk817 = dev_get_regmap(poweroff_data->rk817, NULL);
+	if (!rk817) {
+		dev_err(poweroff_data->dev, "failed to get rk817 regmap\n");
+		return notifier_from_errno(-EINVAL);
+	}
+
+	/* RK818 Regmap */
+	rk818 = dev_get_regmap(poweroff_data->rk818, NULL);
+	if (!rk818) {
+		dev_err(poweroff_data->dev, "failed to get rk818 regmap\n");
+		return notifier_from_errno(-EINVAL);
+	}
+
+	dev_info(poweroff_data->dev, "Setting PMICs for power off");
+
+	/* RK817 */
+	ret = regmap_update_bits(rk817, RK817_SYS_CFG(3), DEV_OFF, DEV_OFF);
+	if (ret) {
+		dev_err(poweroff_data->dev, "failed to poweroff rk817\n");
+		return notifier_from_errno(ret);
+	}
+
+	/* RK818 */
+	ret = regmap_update_bits(rk818, RK818_DEVCTRL_REG, DEV_OFF, DEV_OFF);
+	if (ret) {
+		dev_err(poweroff_data->dev, "failed to poweroff rk818\n");
+		return notifier_from_errno(ret);
+	}
+
+	return NOTIFY_OK;
+}
+
+static void odroid_go_ultra_poweroff_put_pmic_device(void *data)
+{
+	struct device *dev = data;
+
+	put_device(dev);
+}
+
+static int odroid_go_ultra_poweroff_get_pmic_device(struct device *dev, const char *compatible,
+						    struct device **pmic)
+{
+	struct device_node *pmic_node;
+	struct i2c_client *pmic_client;
+
+	pmic_node = of_find_compatible_node(NULL, NULL, compatible);
+	if (!pmic_node)
+		return -ENODEV;
+
+	pmic_client = of_find_i2c_device_by_node(pmic_node);
+	of_node_put(pmic_node);
+	if (!pmic_client)
+		return -EPROBE_DEFER;
+
+	*pmic = &pmic_client->dev;
+
+	return devm_add_action_or_reset(dev, odroid_go_ultra_poweroff_put_pmic_device, *pmic);
+}
+
+static int odroid_go_ultra_poweroff_probe(struct platform_device *pdev)
+{
+	struct odroid_go_ultra_poweroff_data *poweroff_data;
+	int ret;
+
+	poweroff_data = devm_kzalloc(&pdev->dev, sizeof(*poweroff_data), GFP_KERNEL);
+	if (!poweroff_data)
+		return -ENOMEM;
+
+	dev_set_drvdata(&pdev->dev, poweroff_data);
+
+	/* RK818 PMIC Device */
+	ret = odroid_go_ultra_poweroff_get_pmic_device(&pdev->dev, "rockchip,rk818",
+						       &poweroff_data->rk818);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to get rk818 mfd data\n");
+
+	/* RK817 PMIC Device */
+	ret = odroid_go_ultra_poweroff_get_pmic_device(&pdev->dev, "rockchip,rk817",
+						       &poweroff_data->rk817);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to get rk817 mfd data\n");
+
+	/* Register as SYS_OFF_MODE_POWER_OFF_PREPARE because regmap_update_bits may sleep */
+	ret = devm_register_sys_off_handler(&pdev->dev,
+					    SYS_OFF_MODE_POWER_OFF_PREPARE,
+					    SYS_OFF_PRIO_DEFAULT,
+					    odroid_go_ultra_poweroff_prepare,
+					    poweroff_data);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to register sys-off handler\n");
+
+	dev_info(&pdev->dev, "Registered Power-Off handler\n");
+
+	return 0;
+}
+static struct platform_device *pdev;
+
+static struct platform_driver odroid_go_ultra_poweroff_driver = {
+	.driver = {
+		.name	= "odroid-go-ultra-poweroff",
+	},
+	.probe = odroid_go_ultra_poweroff_probe,
+};
+
+static int __init odroid_go_ultra_poweroff_init(void)
+{
+	int ret;
+
+	/* Only create when running on the Odroid Go Ultra device */
+	if (!of_device_is_compatible(of_root, "hardkernel,odroid-go-ultra"))
+		return -ENODEV;
+
+	ret = platform_driver_register(&odroid_go_ultra_poweroff_driver);
+	if (ret)
+		return ret;
+
+	pdev = platform_device_register_resndata(NULL, "odroid-go-ultra-poweroff", -1,
+						 NULL, 0, NULL, 0);
+
+	if (IS_ERR(pdev)) {
+		platform_driver_unregister(&odroid_go_ultra_poweroff_driver);
+		return PTR_ERR(pdev);
+	}
+
+	return 0;
+}
+
+static void __exit odroid_go_ultra_poweroff_exit(void)
+{
+	/* Only delete when running on the Odroid Go Ultra device */
+	if (!of_device_is_compatible(of_root, "hardkernel,odroid-go-ultra"))
+		return;
+
+	platform_device_unregister(pdev);
+	platform_driver_unregister(&odroid_go_ultra_poweroff_driver);
+}
+
+module_init(odroid_go_ultra_poweroff_init);
+module_exit(odroid_go_ultra_poweroff_exit);
+
+MODULE_AUTHOR("Neil Armstrong <[e-mail]>");
+MODULE_DESCRIPTION("Odroid Go Ultra poweroff driver");
+MODULE_LICENSE("GPL");

drivers/power/reset/syscon-reboot.c

···
 	struct syscon_reboot_context *ctx;
 	struct device *dev = &pdev->dev;
 	int mask_err, value_err;
+	int priority;
 	int err;
 
 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
···
 		if (IS_ERR(ctx->map))
 			return PTR_ERR(ctx->map);
 	}
+
+	if (of_property_read_s32(pdev->dev.of_node, "priority", &priority))
+		priority = 192;
 
 	if (of_property_read_u32(pdev->dev.of_node, "offset", &ctx->offset))
 		return -EINVAL;
···
 	}
 
 	ctx->restart_handler.notifier_call = syscon_restart_handle;
-	ctx->restart_handler.priority = 192;
+	ctx->restart_handler.priority = priority;
 	err = register_restart_handler(&ctx->restart_handler);
 	if (err)
 		dev_err(dev, "can't register restart notifier (err=%d)\n", err);

drivers/power/supply/Kconfig

···
 	help
 	  Say Y to enable support for Richtek RT9455 battery charger.
 
+config CHARGER_RT9467
+	tristate "Richtek RT9467 Battery Charger Driver"
+	depends on I2C && GPIOLIB && REGULATOR
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select LINEAR_RANGES
+	help
+	  Say Y here to enable RT9467 Battery Charger.
+	  RT9467 is a switch-mode single cell Li-Ion/Li-Polymer battery charger
+	  for portable applications. It integrates a synchronous PWM controller,
+	  power MOSFETs, input current sensing and regulation, high-accuracy
+	  voltage regulation, and charge termination. The charge current is
+	  regulated through integrated sensing resistors. It also features
+	  USB On-The-Go (OTG) support and integrates D+/D- pin for USB
+	  host/charging port detection.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "rt9467-charger".
+
+config CHARGER_RT9471
+	tristate "Richtek RT9471 battery charger driver"
+	depends on I2C && GPIOLIB && REGULATOR
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select LINEAR_RANGES
+	help
+	  This adds support for Richtek RT9471 battery charger. RT9471 is
+	  highly-integrated switch mode battery charger which is system power
+	  patch manageable device for single cell Li-Ion and Li-polymer battery.
+	  It can support BC12 detection on DPDM, and current and voltage
+	  regulation on both charging and boost mode.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called rt9471.
+
 config CHARGER_CROS_USBPD
 	tristate "ChromeOS EC based USBPD charger"
 	depends on CROS_USBPD_NOTIFY

drivers/power/supply/Makefile

···
 obj-$(CONFIG_BATTERY_MAX1721X)	+= max1721x_battery.o
 obj-$(CONFIG_BATTERY_RT5033)	+= rt5033_battery.o
 obj-$(CONFIG_CHARGER_RT9455)	+= rt9455_charger.o
+obj-$(CONFIG_CHARGER_RT9467)	+= rt9467-charger.o
+obj-$(CONFIG_CHARGER_RT9471)	+= rt9471.o
 obj-$(CONFIG_BATTERY_TWL4030_MADC)	+= twl4030_madc_battery.o
 obj-$(CONFIG_CHARGER_88PM860X)	+= 88pm860x_charger.o
 obj-$(CONFIG_CHARGER_PCF50633)	+= pcf50633-charger.o

drivers/power/supply/ab8500_fg.c

···
 
 static ssize_t charge_full_show(struct ab8500_fg *di, char *buf)
 {
-	return sprintf(buf, "%d\n", di->bat_cap.max_mah);
+	return sysfs_emit(buf, "%d\n", di->bat_cap.max_mah);
 }
 
 static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf,
···
 
 static ssize_t charge_now_show(struct ab8500_fg *di, char *buf)
 {
-	return sprintf(buf, "%d\n", di->bat_cap.prev_mah);
+	return sysfs_emit(buf, "%d\n", di->bat_cap.prev_mah);
 }
 
 static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf,
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F));
+	return sysfs_emit(buf, "%d\n", (reg_value & 0x7F));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F));
+	return sysfs_emit(buf, "%d\n", (reg_value & 0x7F));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF));
+	return sysfs_emit(buf, "%d\n", (reg_value & 0xF));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F));
+	return sysfs_emit(buf, "%d\n", (reg_value & 0x7F));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4);
+	return sysfs_emit(buf, "%d\n", (reg_value & 0xF0) >> 4);
 
 fail:
 	return ret;
···
 	if (ret < 0)
 		goto fail;
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1));
+	return sysfs_emit(buf, "%d\n", (reg_value & 0x1));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4));
+	return sysfs_emit(buf, "%d\n", ((reg_value & 0x10) >> 4));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7));
+	return sysfs_emit(buf, "%d\n", (reg_value & 0x7));
 
 fail:
 	return ret;
···
 		goto fail;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5));
+	return sysfs_emit(buf, "%d\n", ((reg_value & 0x20) >> 5));
 
 fail:
 	return ret;

drivers/power/supply/bq2415x_charger.c

···
 	ret = bq2415x_exec_command(bq, command);
 	if (ret < 0)
 		return ret;
-	return sprintf(buf, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 /*
···
 	struct bq2415x_device *bq = power_supply_get_drvdata(psy);
 
 	if (bq->timer_error)
-		return sprintf(buf, "%s\n", bq->timer_error);
+		return sysfs_emit(buf, "%s\n", bq->timer_error);
 
 	if (bq->autotimer)
-		return sprintf(buf, "auto\n");
-	return sprintf(buf, "off\n");
+		return sysfs_emit(buf, "auto\n");
+	return sysfs_emit(buf, "off\n");
 }
 
 /*
···
 	ssize_t ret = 0;
 
 	if (bq->automode > 0)
-		ret += sprintf(buf+ret, "auto (");
+		ret += sysfs_emit_at(buf, ret, "auto (");
 
 	switch (bq->mode) {
 	case BQ2415X_MODE_OFF:
-		ret += sprintf(buf+ret, "off");
+		ret += sysfs_emit_at(buf, ret, "off");
 		break;
 	case BQ2415X_MODE_NONE:
-		ret += sprintf(buf+ret, "none");
+		ret += sysfs_emit_at(buf, ret, "none");
 		break;
 	case BQ2415X_MODE_HOST_CHARGER:
-		ret += sprintf(buf+ret, "host");
+		ret += sysfs_emit_at(buf, ret, "host");
 		break;
 	case BQ2415X_MODE_DEDICATED_CHARGER:
-		ret += sprintf(buf+ret, "dedicated");
+		ret += sysfs_emit_at(buf, ret, "dedicated");
 		break;
 	case BQ2415X_MODE_BOOST:
-		ret += sprintf(buf+ret, "boost");
+		ret += sysfs_emit_at(buf, ret, "boost");
 		break;
 	}
 
 	if (bq->automode > 0)
-		ret += sprintf(buf+ret, ")");
+		ret += sysfs_emit_at(buf, ret, ")");
 
-	ret += sprintf(buf+ret, "\n");
+	ret += sysfs_emit_at(buf, ret, "\n");
 	return ret;
 }
 
···
 
 	switch (bq->reported_mode) {
 	case BQ2415X_MODE_OFF:
-		return sprintf(buf, "off\n");
+		return sysfs_emit(buf, "off\n");
 	case BQ2415X_MODE_NONE:
-		return sprintf(buf, "none\n");
+		return sysfs_emit(buf, "none\n");
 	case BQ2415X_MODE_HOST_CHARGER:
-		return sprintf(buf, "host\n");
+		return sysfs_emit(buf, "host\n");
 	case BQ2415X_MODE_DEDICATED_CHARGER:
-		return sprintf(buf, "dedicated\n");
+		return sysfs_emit(buf, "dedicated\n");
 	case BQ2415X_MODE_BOOST:
-		return sprintf(buf, "boost\n");
+		return sysfs_emit(buf, "boost\n");
 	}
 
 	return -EINVAL;
···
 	int ret = bq2415x_i2c_read(bq, reg);
 
 	if (ret < 0)
-		return sprintf(buf, "%#.2x=error %d\n", reg, ret);
-	return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
+		return sysfs_emit(buf, "%#.2x=error %d\n", reg, ret);
+	return sysfs_emit(buf, "%#.2x=%#.2x\n", reg, ret);
 }
 
 /* show all raw values of chip register, format per line: 'register=value' */
···
 
 	if (ret < 0)
 		return ret;
-	return sprintf(buf, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 /* set *_enable entries */
···
 	ret = bq2415x_exec_command(bq, command);
 	if (ret < 0)
 		return ret;
-	return sprintf(buf, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,

drivers/power/supply/bq24190_charger.c

···
 	if (ret)
 		count = ret;
 	else
-		count = scnprintf(buf, PAGE_SIZE, "%hhx\n", v);
+		count = sysfs_emit(buf, "%hhx\n", v);
 
 	pm_runtime_mark_last_busy(bdi->dev);
 	pm_runtime_put_autosuspend(bdi->dev);

drivers/power/supply/bq24257_charger.c

···
 	struct power_supply *psy = dev_get_drvdata(dev);
 	struct bq24257_device *bq = power_supply_get_drvdata(psy);
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n",
-			 bq24257_vovp_map[bq->init_data.vovp]);
+	return sysfs_emit(buf, "%u\n", bq24257_vovp_map[bq->init_data.vovp]);
 }
 
 static ssize_t bq24257_show_in_dpm_voltage(struct device *dev,
···
 	struct power_supply *psy = dev_get_drvdata(dev);
 	struct bq24257_device *bq = power_supply_get_drvdata(psy);
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n",
-			 bq24257_vindpm_map[bq->init_data.vindpm]);
+	return sysfs_emit(buf, "%u\n", bq24257_vindpm_map[bq->init_data.vindpm]);
 }
 
 static ssize_t bq24257_sysfs_show_enable(struct device *dev,
···
 	if (ret < 0)
 		return ret;
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 static ssize_t bq24257_sysfs_set_enable(struct device *dev,

drivers/power/supply/bq256xx_charger.c

···
 		return ret;
 
 	ret = bq->chip_info->bq256xx_set_ichg(bq,
-				bat_info->constant_charge_current_max_ua);
+				bq->chip_info->bq256xx_def_ichg);
 	if (ret)
 		return ret;
 
···
 		return ret;
 
 	ret = bq->chip_info->bq256xx_set_vbatreg(bq,
-				bat_info->constant_charge_voltage_max_uv);
+				bq->chip_info->bq256xx_def_vbatreg);
 	if (ret)
 		return ret;
 

drivers/power/supply/bq25890_charger.c

···
 
 struct bq25890_state {
 	u8 online;
+	u8 hiz;
 	u8 chrg_status;
 	u8 chrg_fault;
 	u8 vsys_status;
···
 	struct i2c_client *client;
 	struct device *dev;
 	struct power_supply *charger;
+	struct power_supply *secondary_chrg;
+	struct power_supply_desc desc;
+	char name[28]; /* "bq25890-charger-%d" */
+	int id;
 
 	struct usb_phy *usb_phy;
 	struct notifier_block usb_nb;
···
 
 	bool skip_reset;
 	bool read_back_init_data;
+	bool force_hiz;
 	u32 pump_express_vbus_max;
+	u32 iinlim_percentage;
 	enum bq25890_chip_version chip_version;
 	struct bq25890_init_data init_data;
 	struct bq25890_state state;
 
 	struct mutex lock; /* protect state data */
 };
+
+static DEFINE_IDR(bq25890_id);
+static DEFINE_MUTEX(bq25890_id_mutex);
 
 static const struct regmap_range bq25890_readonly_reg_ranges[] = {
 	regmap_reg_range(0x0b, 0x0c),
···
 	return bq25890_find_val(ret, TBL_VBUSV);
 }
 
-static int bq25890_power_supply_get_property(struct power_supply *psy,
-					     enum power_supply_property psp,
-					     union power_supply_propval *val)
+static void bq25890_update_state(struct bq25890_device *bq,
+				 enum power_supply_property psp,
+				 struct bq25890_state *state)
 {
-	struct bq25890_device *bq = power_supply_get_drvdata(psy);
-	struct bq25890_state state;
 	bool do_adc_conv;
 	int ret;
 
 	mutex_lock(&bq->lock);
 	/* update state in case we lost an interrupt */
 	__bq25890_handle_irq(bq);
-	state = bq->state;
-	do_adc_conv = !state.online && bq25890_is_adc_property(psp);
+	*state = bq->state;
+	do_adc_conv = (!state->online || state->hiz) && bq25890_is_adc_property(psp);
 	if (do_adc_conv)
 		bq25890_field_write(bq, F_CONV_START, 1);
 	mutex_unlock(&bq->lock);
···
 	if (do_adc_conv)
 		regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START],
 			ret, !ret, 25000, 1000000);
+}
+
+static int bq25890_power_supply_get_property(struct power_supply *psy,
+					     enum power_supply_property psp,
+					     union power_supply_propval *val)
+{
+	struct bq25890_device *bq = power_supply_get_drvdata(psy);
+	struct bq25890_state state;
+	int ret;
+
+	bq25890_update_state(bq, psp, &state);
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
-		if (!state.online)
+		if (!state.online || state.hiz)
 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 		else if (state.chrg_status == STATUS_NOT_CHARGING)
 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
···
 		break;
 
 	case POWER_SUPPLY_PROP_CHARGE_TYPE:
-		if (!state.online || state.chrg_status == STATUS_NOT_CHARGING ||
+		if (!state.online || state.hiz ||
+		    state.chrg_status == STATUS_NOT_CHARGING ||
 		    state.chrg_status == STATUS_TERMINATION_DONE)
 			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 		else if (state.chrg_status == STATUS_PRE_CHARGING)
···
 		break;
 
 	case POWER_SUPPLY_PROP_ONLINE:
-		val->intval = state.online;
+		val->intval = state.online && !state.hiz;
 		break;
 
 	case POWER_SUPPLY_PROP_HEALTH:
···
 					     const union power_supply_propval *val)
 {
 	struct bq25890_device *bq = power_supply_get_drvdata(psy);
-	int maxval;
+	struct bq25890_state state;
+	int maxval, ret;
 	u8 lval;
 
 	switch (psp) {
···
 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 		lval = bq25890_find_idx(val->intval, TBL_IINLIM);
 		return bq25890_field_write(bq, F_IINLIM, lval);
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = bq25890_field_write(bq, F_EN_HIZ, !val->intval);
+		if (!ret)
+			bq->force_hiz = !val->intval;
+		bq25890_update_state(bq, psp, &state);
+		return ret;
 	default:
 		return -EINVAL;
 	}
···
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_ONLINE:
 		return true;
 	default:
 		return false;
 	}
+}
+
+/*
+ * If there are multiple chargers the maximum current the external power-supply
+ * can deliver needs to be divided over the chargers. This is done according
+ * to the bq->iinlim_percentage setting.
+ */
+static int bq25890_charger_get_scaled_iinlim_regval(struct bq25890_device *bq,
+						    int iinlim_ua)
+{
+	iinlim_ua = iinlim_ua * bq->iinlim_percentage / 100;
+	return bq25890_find_idx(iinlim_ua, TBL_IINLIM);
 }
 
 /* On the BQ25892 try to get charger-type info from our supplier */
···
 
 	switch (val.intval) {
 	case POWER_SUPPLY_USB_TYPE_DCP:
-		input_current_limit = bq25890_find_idx(2000000, TBL_IINLIM);
+		input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 2000000);
 		if (bq->pump_express_vbus_max) {
 			queue_delayed_work(system_power_efficient_wq,
 					   &bq->pump_express_work,
···
 		break;
 	case POWER_SUPPLY_USB_TYPE_CDP:
 	case POWER_SUPPLY_USB_TYPE_ACA:
-		input_current_limit = bq25890_find_idx(1500000, TBL_IINLIM);
+		input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 1500000);
 		break;
 	case POWER_SUPPLY_USB_TYPE_SDP:
 	default:
-		input_current_limit = bq25890_find_idx(500000, TBL_IINLIM);
+		input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 500000);
 	}
 
 	bq25890_field_write(bq, F_IINLIM, input_current_limit);
···
 	} state_fields[] = {
 		{F_CHG_STAT,	&state->chrg_status},
 		{F_PG_STAT,	&state->online},
+		{F_EN_HIZ,	&state->hiz},
 		{F_VSYS_STAT,	&state->vsys_status},
 		{F_BOOST_FAULT, &state->boost_fault},
 		{F_BAT_FAULT,	&state->bat_fault},
···
 		*state_fields[i].data = ret;
 	}
 
-	dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n",
-		state->chrg_status, state->online, state->vsys_status,
-		state->chrg_fault, state->boost_fault, state->bat_fault,
-		state->ntc_fault);
+	dev_dbg(bq->dev, "S:CHG/PG/HIZ/VSYS=%d/%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n",
+		state->chrg_status, state->online,
+		state->hiz, state->vsys_status,
+		state->chrg_fault, state->boost_fault,
+		state->bat_fault, state->ntc_fault);
 
 	return 0;
 }
 
 static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq)
 {
+	bool adc_conv_rate, new_adc_conv_rate;
 	struct bq25890_state new_state;
 	int ret;
 
···
 	if (!memcmp(&bq->state, &new_state, sizeof(new_state)))
 		return IRQ_NONE;
 
-	if (!new_state.online && bq->state.online) {	    /* power removed */
-		/* disable ADC */
-		ret = bq25890_field_write(bq, F_CONV_RATE, 0);
+	/*
+	 * Restore HiZ bit in case it was set by user. The chip does not retain
+	 * this bit on cable replug, hence the bit must be reset manually here.
+	 */
+	if (new_state.online && !bq->state.online && bq->force_hiz) {
+		ret = bq25890_field_write(bq, F_EN_HIZ, bq->force_hiz);
 		if (ret < 0)
 			goto error;
-	} else if (new_state.online && !bq->state.online) { /* power inserted */
-		/* enable ADC, to have control of charge current/voltage */
-		ret = bq25890_field_write(bq, F_CONV_RATE, 1);
+		new_state.hiz = 1;
+	}
+
+	/* Should period ADC sampling be enabled? */
+	adc_conv_rate = bq->state.online && !bq->state.hiz;
+	new_adc_conv_rate = new_state.online && !new_state.hiz;
+
+	if (new_adc_conv_rate != adc_conv_rate) {
+		ret = bq25890_field_write(bq, F_CONV_RATE, new_adc_conv_rate);
 		if (ret < 0)
 			goto error;
 	}
···
 	}
 
 	/* Configure ADC for continuous conversions when charging */
-	ret = bq25890_field_write(bq, F_CONV_RATE, !!bq->state.online);
+	ret = bq25890_field_write(bq, F_CONV_RATE, bq->state.online && !bq->state.hiz);
 	if (ret < 0) {
 		dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
 		return ret;
···
 };
 
 static const struct power_supply_desc bq25890_power_supply_desc = {
-	.name = "bq25890-charger",
 	.type = POWER_SUPPLY_TYPE_USB,
 	.properties = bq25890_power_supply_props,
 	.num_properties = ARRAY_SIZE(bq25890_power_supply_props),
···
 {
 	struct power_supply_config psy_cfg = { .drv_data = bq, };
 
+	/* Get ID for the device */
+	mutex_lock(&bq25890_id_mutex);
+	bq->id = idr_alloc(&bq25890_id, bq, 0, 0, GFP_KERNEL);
+	mutex_unlock(&bq25890_id_mutex);
+	if (bq->id < 0)
+		return bq->id;
+
+	snprintf(bq->name, sizeof(bq->name), "bq25890-charger-%d", bq->id);
+	bq->desc = bq25890_power_supply_desc;
+	bq->desc.name = bq->name;
+
 	psy_cfg.supplied_to = bq25890_charger_supplied_to;
 	psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
 
-	bq->charger = devm_power_supply_register(bq->dev,
-						 &bq25890_power_supply_desc,
-						 &psy_cfg);
+	bq->charger = devm_power_supply_register(bq->dev, &bq->desc, &psy_cfg);
 
 	return PTR_ERR_OR_ZERO(bq->charger);
 }
···
 {
 	struct bq25890_device *bq =
 		container_of(data, struct bq25890_device, pump_express_work.work);
+	union power_supply_propval value;
 	int voltage, i, ret;
 
 	dev_dbg(bq->dev, "Start to request input voltage increasing\n");
+
+	/* If there is a second charger put in Hi-Z mode */
+	if (bq->secondary_chrg) {
+		value.intval = 0;
+		power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &value);
+	}
 
 	/* Enable current pulse voltage control protocol */
 	ret = bq25890_field_write(bq, F_PUMPX_EN, 1);
···
 	}
 
 	bq25890_field_write(bq, F_PUMPX_EN, 0);
+
+	if (bq->secondary_chrg) {
+		value.intval = 1;
+		power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &value);
+	}
 
 	dev_info(bq->dev, "Hi-voltage charging requested, input voltage is %d mV\n",
 		 voltage);
···
 static int bq25890_vbus_enable(struct regulator_dev *rdev)
 {
 	struct bq25890_device *bq = rdev_get_drvdata(rdev);
+	union power_supply_propval val = {
+		.intval = 0,
+	};
+
+	/*
+	 * When enabling 5V boost / Vbus output, we need to put the secondary
+	 * charger in Hi-Z mode to avoid it trying to charge the secondary
+	 * battery from the 5V boost output.
+	 */
+	if (bq->secondary_chrg)
+		power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &val);
 
 	return bq25890_set_otg_cfg(bq, 1);
 }
···
 static int bq25890_vbus_disable(struct regulator_dev *rdev)
 {
 	struct bq25890_device *bq = rdev_get_drvdata(rdev);
+	union power_supply_propval val = {
+		.intval = 1,
+	};
+	int ret;
 
-	return bq25890_set_otg_cfg(bq, 0);
+	ret = bq25890_set_otg_cfg(bq, 0);
+	if (ret)
+		return ret;
+
+	if (bq->secondary_chrg)
+		power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &val);
+
+	return 0;
 }
 
 static int bq25890_vbus_is_enabled(struct regulator_dev *rdev)
···
 {
 	int ret;
 	struct bq25890_init_data *init = &bq->init_data;
+	const char *str;
+	u32 val;
+
+	ret = device_property_read_string(bq->dev, "linux,secondary-charger-name", &str);
+	if (ret == 0) {
+		bq->secondary_chrg = power_supply_get_by_name(str);
+		if (!bq->secondary_chrg)
+			return -EPROBE_DEFER;
+	}
 
 	/* Optional, left at 0 if property is not present */
 	device_property_read_u32(bq->dev, "linux,pump-express-vbus-max",
 				 &bq->pump_express_vbus_max);
+
+	ret = device_property_read_u32(bq->dev, "linux,iinlim-percentage", &val);
+	if (ret == 0) {
+		if (val > 100) {
+			dev_err(bq->dev, "Error linux,iinlim-percentage %u > 100\n", val);
+			return -EINVAL;
+		}
+		bq->iinlim_percentage = val;
+	} else {
+		bq->iinlim_percentage = 100;
+	}
 
 	bq->skip_reset = device_property_read_bool(bq->dev, "linux,skip-reset");
 	bq->read_back_init_data = device_property_read_bool(bq->dev,
···
 	struct bq25890_device *bq = data;
 
 	cancel_delayed_work_sync(&bq->pump_express_work);
+
+	if (bq->id >= 0) {
+		mutex_lock(&bq25890_id_mutex);
+		idr_remove(&bq25890_id, bq->id);
+		mutex_unlock(&bq25890_id_mutex);
+	}
 }
 
 static int bq25890_probe(struct i2c_client *client)
···
 
 	bq->client = client;
 	bq->dev = dev;
+	bq->id = -1;
 
 	mutex_init(&bq->lock);
 	INIT_DELAYED_WORK(&bq->pump_express_work, bq25890_pump_express_work);

drivers/power/supply/bq27xxx_battery.c

···
 	if (di->opts & BQ27XXX_O_ZERO) {
 		if (di->cache.flags & BQ27000_FLAG_FC)
 			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
-		else if (di->cache.flags & BQ27000_FLAG_EDV1)
-			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 		else if (di->cache.flags & BQ27000_FLAG_EDVF)
 			level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+		else if (di->cache.flags & BQ27000_FLAG_EDV1)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 		else
 			level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 	} else if (di->opts & BQ27Z561_O_BITS) {
···
 	} else {
 		if (di->cache.flags & BQ27XXX_FLAG_FC)
 			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
-		else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
-			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 		else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
 			level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+		else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
+			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 		else
 			level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 	}

drivers/power/supply/charger-manager.c

···
 	struct charger_regulator *charger
 		= container_of(attr, struct charger_regulator, attr_name);
 
-	return sprintf(buf, "%s\n", charger->regulator_name);
+	return sysfs_emit(buf, "%s\n", charger->regulator_name);
 }
 
 static ssize_t charger_state_show(struct device *dev,
···
 	if (!charger->externally_control)
 		state = regulator_is_enabled(charger->consumer);
 
-	return sprintf(buf, "%s\n", state ? "enabled" : "disabled");
+	return sysfs_emit(buf, "%s\n", state ? "enabled" : "disabled");
 }
 
 static ssize_t charger_externally_control_show(struct device *dev,
···
 	struct charger_regulator *charger = container_of(attr,
 			struct charger_regulator, attr_externally_control);
 
-	return sprintf(buf, "%d\n", charger->externally_control);
+	return sysfs_emit(buf, "%d\n", charger->externally_control);
 }
 
 static ssize_t charger_externally_control_store(struct device *dev,

drivers/power/supply/collie_battery.c

···
 		goto err_psy_reg_bu;
 	}
 
-	ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO),
+	ret = request_irq(gpiod_to_irq(collie_bat_main.gpio_full),
 				collie_bat_gpio_isr,
 				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 				"main full", &collie_bat_main);
···
 
 static void collie_bat_remove(struct ucb1x00_dev *dev)
 {
-	free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main);
+	free_irq(gpiod_to_irq(collie_bat_main.gpio_full), &collie_bat_main);
 	power_supply_unregister(collie_bat_bu.psy);
 	power_supply_unregister(collie_bat_main.psy);
 

drivers/power/supply/da9150-charger.c

···
 	int irq, ret;
 
 	irq = platform_get_irq_byname(pdev, irq_name);
-	if (irq < 0) {
-		dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
 	ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
 				   charger);
···
 static void da9150_charger_unregister_irq(struct platform_device *pdev,
 					  const char *irq_name)
 {
-	struct device *dev = &pdev->dev;
 	struct da9150_charger *charger = platform_get_drvdata(pdev);
 	int irq;
 
 	irq = platform_get_irq_byname(pdev, irq_name);
-	if (irq < 0) {
-		dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
+	if (irq < 0)
 		return;
-	}
 
 	free_irq(irq, charger);
 }

drivers/power/supply/ds2780_battery.c

···
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 		 !!(control_reg & DS2780_CONTROL_REG_PMOD));
 }
 
···
 	if (ret < 0)
 		return ret;
 
-	ret = sprintf(buf, "%d\n", sense_resistor);
+	ret = sysfs_emit(buf, "%d\n", sense_resistor);
 	return ret;
 }
 
···
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", rsgain);
+	return sysfs_emit(buf, "%d\n", rsgain);
 }
 
 static ssize_t ds2780_set_rsgain_setting(struct device *dev,
···
 	if (ret < 0)
 		return ret;
 
-	ret = sprintf(buf, "%d\n", sfr & DS2780_SFR_REG_PIOSC);
+	ret = sysfs_emit(buf, "%d\n", sfr & DS2780_SFR_REG_PIOSC);
 	return ret;
 }
 

drivers/power/supply/ds2781_battery.c

···
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 		 !!(control_reg & DS2781_CONTROL_PMOD));
 }
 
···
 	if (ret < 0)
 		return ret;
 
-	ret = sprintf(buf, "%d\n", sense_resistor);
+	ret = sysfs_emit(buf, "%d\n", sense_resistor);
 	return ret;
 }
 
···
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", rsgain);
+	return sysfs_emit(buf, "%d\n", rsgain);
 }
 
 static ssize_t ds2781_set_rsgain_setting(struct device *dev,
···
 	if (ret < 0)
 		return ret;
 
-	ret = sprintf(buf, "%d\n", sfr & DS2781_SFR_PIOSC);
+	ret = sysfs_emit(buf, "%d\n", sfr & DS2781_SFR_PIOSC);
 	return ret;
 }
 

drivers/power/supply/lp8788-charger.c

···
 	lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
 	state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
 
-	return scnprintf(buf, PAGE_SIZE, "%s\n", desc[state]);
+	return sysfs_emit(buf, "%s\n", desc[state]);
 }
 
 static ssize_t lp8788_show_eoc_time(struct device *dev,
···
 	lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
 	val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S;
 
-	return scnprintf(buf, PAGE_SIZE, "End Of Charge Time: %s\n",
-			stime[val]);
+	return sysfs_emit(buf, "End Of Charge Time: %s\n", stime[val]);
 }
 
 static ssize_t lp8788_show_eoc_level(struct device *dev,
···
 	val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S;
 	level = mode ? abs_level[val] : relative_level[val];
 
-	return scnprintf(buf, PAGE_SIZE, "End Of Charge Level: %s\n", level);
+	return sysfs_emit(buf, "End Of Charge Level: %s\n", level);
 }
 
 static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL);

drivers/power/supply/ltc4162-l-charger.c

···
 		}
 	}
 
-	return sprintf(buf, "%s\n", result);
+	return sysfs_emit(buf, "%s\n", result);
 }
 static DEVICE_ATTR_RO(charge_status);
 
···
 	if (ret)
 		return ret;
 
-	return sprintf(buf, "%d\n", val.intval);
+	return sysfs_emit(buf, "%d\n", val.intval);
 }
 static DEVICE_ATTR_RO(vbat);
 
···
 	if (ret)
 		return ret;
 
-	return sprintf(buf, "%d\n", val.intval);
+	return sysfs_emit(buf, "%d\n", val.intval);
 }
 static DEVICE_ATTR_RO(vbat_avg);
 
···
 	if (ret)
 		return ret;
 
-	return sprintf(buf, "%d\n", val.intval);
+	return sysfs_emit(buf, "%d\n", val.intval);
 }
 static DEVICE_ATTR_RO(ibat);
 
···
 	if (ret)
 		return ret;
 
-	return sprintf(buf, "%u\n", regval & BIT(2) ? 1 : 0);
+	return sysfs_emit(buf, "%u\n", regval & BIT(2) ? 1 : 0);
 }
 
 static ssize_t force_telemetry_store(struct device *dev,
···
 	if (ret)
 		return ret;
 
-	return sprintf(buf, "%u\n",
+	return sysfs_emit(buf, "%u\n",
 		regval == LTC4162L_ARM_SHIP_MODE_MAGIC ? 1 : 0);
 }
 

drivers/power/supply/max14577_charger.c

···
 		break;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(buf, "%u\n", val);
 }
 
 static ssize_t store_fast_charge_timer(struct device *dev,

drivers/power/supply/max1721x_battery.c

···
 	}
 
 	if (!info->ManufacturerName[0])
-		strncpy(info->ManufacturerName, DEF_MFG_NAME,
+		strscpy(info->ManufacturerName, DEF_MFG_NAME,
 			2 * MAX1721X_REG_MFG_NUMB);
 
 	if (get_string(info, MAX1721X_REG_DEV_STR,
···
 
 		switch (dev_name & MAX172XX_DEV_MASK) {
 		case MAX172X1_DEV:
-			strncpy(info->DeviceName, DEF_DEV_NAME_MAX17211,
+			strscpy(info->DeviceName, DEF_DEV_NAME_MAX17211,
 				2 * MAX1721X_REG_DEV_NUMB);
 			break;
 		case MAX172X5_DEV:
-			strncpy(info->DeviceName, DEF_DEV_NAME_MAX17215,
+			strscpy(info->DeviceName, DEF_DEV_NAME_MAX17215,
 				2 * MAX1721X_REG_DEV_NUMB);
 			break;
 		default:
-			strncpy(info->DeviceName, DEF_DEV_NAME_UNKNOWN,
+			strscpy(info->DeviceName, DEF_DEV_NAME_UNKNOWN,
 				2 * MAX1721X_REG_DEV_NUMB);
 		}
 	}

drivers/power/supply/max77650-charger.c

···
 	return rv;
 }
 
-static int max77650_charger_disable(struct max77650_charger_data *chg)
+static void max77650_charger_disable(struct max77650_charger_data *chg)
 {
 	int rv;
 
···
 				MAX77650_CHARGER_DISABLED);
 	if (rv)
 		dev_err(chg->dev, "unable to disable the charger: %d\n", rv);
-
-	return rv;
 }
 
 static irqreturn_t max77650_charger_check_status(int irq, void *data)
···
 {
 	struct max77650_charger_data *chg = platform_get_drvdata(pdev);
 
-	return max77650_charger_disable(chg);
+	max77650_charger_disable(chg);
+
+	return 0;
 }
 
 static const struct of_device_id max77650_charger_of_match[] = {

drivers/power/supply/max77693_charger.c

···
 		break;
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(buf, "%u\n", val);
 }
 
 static int max77693_set_fast_charge_timer(struct max77693_charger *chg,
···
 	else
 		val = data * 50000;
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(buf, "%u\n", val);
 }
 
 static int max77693_set_top_off_threshold_current(struct max77693_charger *chg,
···
 
 	val = data * 10;
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(buf, "%u\n", val);
 }
 
 static int max77693_set_top_off_timer(struct max77693_charger *chg,

drivers/power/supply/mp2629_charger.c

···
 		return ret;
 
 	rval = (rval >> 4) * 10;
-	return sprintf(buf, "%d mohm\n", rval);
+	return sysfs_emit(buf, "%d mohm\n", rval);
 }
 
 static ssize_t batt_impedance_compensation_store(struct device *dev,

drivers/power/supply/olpc_battery.c

···
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", ec_byte);
+	return sysfs_emit(buf, "%d\n", ec_byte);
 }
 
 static struct device_attribute olpc_bat_error = {

drivers/power/supply/pcf50633-charger.c

···
 	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
 	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
 
-	return sprintf(buf, "%d\n", chgmod);
+	return sysfs_emit(buf, "%d\n", chgmod);
 }
 static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
 
···
 	else
 		ma = 0;
 
-	return sprintf(buf, "%u\n", ma);
+	return sysfs_emit(buf, "%u\n", ma);
 }
 
 static ssize_t set_usblim(struct device *dev,
···
 
 	ma = (mbc->pcf->pdata->charger_reference_current_ma *  mbcc5) >> 8;
 
-	return sprintf(buf, "%u\n", ma);
+	return sysfs_emit(buf, "%u\n", ma);
 }
 
 static ssize_t set_chglim(struct device *dev,

drivers/power/supply/power_supply_core.c

···
 	thermal_zone_device_unregister(psy->tzd);
 }
 
-/* thermal cooling device callbacks */
-static int ps_get_max_charge_cntl_limit(struct thermal_cooling_device *tcd,
-					unsigned long *state)
-{
-	struct power_supply *psy;
-	union power_supply_propval val;
-	int ret;
-
-	psy = tcd->devdata;
-	ret = power_supply_get_property(psy,
-			POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, &val);
-	if (ret)
-		return ret;
-
-	*state = val.intval;
-
-	return ret;
-}
-
-static int ps_get_cur_charge_cntl_limit(struct thermal_cooling_device *tcd,
-					unsigned long *state)
-{
-	struct power_supply *psy;
-	union power_supply_propval val;
-	int ret;
-
-	psy = tcd->devdata;
-	ret = power_supply_get_property(psy,
-			POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val);
-	if (ret)
-		return ret;
-
-	*state = val.intval;
-
-	return ret;
-}
-
-static int ps_set_cur_charge_cntl_limit(struct thermal_cooling_device *tcd,
-					unsigned long state)
-{
-	struct power_supply *psy;
-	union power_supply_propval val;
-	int ret;
-
-	psy = tcd->devdata;
-	val.intval = state;
-	ret = psy->desc->set_property(psy,
-		POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val);
-
-	return ret;
-}
-
-static const struct thermal_cooling_device_ops psy_tcd_ops = {
-	.get_max_state = ps_get_max_charge_cntl_limit,
-	.get_cur_state = ps_get_cur_charge_cntl_limit,
-	.set_cur_state = ps_set_cur_charge_cntl_limit,
-};
-
-static int psy_register_cooler(struct power_supply *psy)
-{
-	/* Register for cooling device if psy can control charging */
-	if (psy_has_property(psy->desc, POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT)) {
-		psy->tcd = thermal_cooling_device_register(
-			(char *)psy->desc->name,
-			psy, &psy_tcd_ops);
-		return PTR_ERR_OR_ZERO(psy->tcd);
-	}
-
-	return 0;
-}
-
-static void psy_unregister_cooler(struct power_supply *psy)
-{
-	if (IS_ERR_OR_NULL(psy->tcd))
-		return;
-	thermal_cooling_device_unregister(psy->tcd);
-}
 #else
 static int psy_register_thermal(struct power_supply *psy)
 {
···
 }
 
 static void psy_unregister_thermal(struct power_supply *psy)
-{
-}
-
-static int psy_register_cooler(struct power_supply *psy)
-{
-	return 0;
-}
-
-static void psy_unregister_cooler(struct power_supply *psy)
 {
 }
 #endif
···
 	if (rc)
 		goto register_thermal_failed;
 
-	rc = psy_register_cooler(psy);
-	if (rc)
-		goto register_cooler_failed;
-
 	rc = power_supply_create_triggers(psy);
 	if (rc)
 		goto create_triggers_failed;
···
 add_hwmon_sysfs_failed:
 	power_supply_remove_triggers(psy);
 create_triggers_failed:
-	psy_unregister_cooler(psy);
-register_cooler_failed:
 	psy_unregister_thermal(psy);
 register_thermal_failed:
 wakeup_init_failed:
···
 	sysfs_remove_link(&psy->dev.kobj, "powers");
 	power_supply_remove_hwmon_sysfs(psy);
 	power_supply_remove_triggers(psy);
-	psy_unregister_cooler(psy);
 	psy_unregister_thermal(psy);
 	device_init_wakeup(&psy->dev, false);
 	device_unregister(&psy->dev);

drivers/power/supply/power_supply_leds.c

···
 #include <linux/device.h>
 #include <linux/power_supply.h>
 #include <linux/slab.h>
+#include <linux/leds.h>
 
 #include "power_supply.h"
 

drivers/power/supply/power_supply_sysfs.c

···
 		usb_type = desc->usb_types[i];
 
 		if (value->intval == usb_type) {
-			count += sprintf(buf + count, "[%s] ",
+			count += sysfs_emit_at(buf, count, "[%s] ",
 					 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
 			match = true;
 		} else {
-			count += sprintf(buf + count, "%s ",
+			count += sysfs_emit_at(buf, count, "%s ",
 					 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
 		}
 	}
···
 
 	if (ps_attr->text_values_len > 0 &&
 	    value.intval < ps_attr->text_values_len && value.intval >= 0) {
-		return sprintf(buf, "%s\n", ps_attr->text_values[value.intval]);
+		return sysfs_emit(buf, "%s\n", ps_attr->text_values[value.intval]);
 	}
 
 	switch (psp) {
···
 						&value, buf);
 		break;
 	case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
-		ret = sprintf(buf, "%s\n", value.strval);
+		ret = sysfs_emit(buf, "%s\n", value.strval);
 		break;
 	default:
-		ret = sprintf(buf, "%d\n", value.intval);
+		ret = sysfs_emit(buf, "%d\n", value.intval);
 	}
 
 	return ret;

drivers/power/supply/rt9467-charger.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <[e-mail]>
+ *         ChiaEn Wu <[e-mail]>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/kstrtox.h>
+#include <linux/linear_range.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/units.h>
+#include <linux/sysfs.h>
+
+#define RT9467_REG_CORE_CTRL0		0x00
+#define RT9467_REG_CHG_CTRL1		0x01
+#define RT9467_REG_CHG_CTRL2		0x02
+#define RT9467_REG_CHG_CTRL3		0x03
+#define RT9467_REG_CHG_CTRL4		0x04
+#define RT9467_REG_CHG_CTRL5		0x05
+#define RT9467_REG_CHG_CTRL6		0x06
+#define RT9467_REG_CHG_CTRL7		0x07
+#define RT9467_REG_CHG_CTRL8		0x08
+#define RT9467_REG_CHG_CTRL9		0x09
+#define RT9467_REG_CHG_CTRL10		0x0A
+#define RT9467_REG_CHG_CTRL12		0x0C
+#define RT9467_REG_CHG_CTRL13		0x0D
+#define RT9467_REG_CHG_CTRL14		0x0E
+#define RT9467_REG_CHG_ADC		0x11
+#define RT9467_REG_CHG_DPDM1		0x12
+#define RT9467_REG_CHG_DPDM2		0x13
+#define RT9467_REG_DEVICE_ID		0x40
+#define RT9467_REG_CHG_STAT		0x42
+#define RT9467_REG_ADC_DATA_H		0x44
+#define RT9467_REG_CHG_STATC		0x50
+#define RT9467_REG_CHG_IRQ1		0x53
+#define RT9467_REG_CHG_STATC_CTRL	0x60
+#define RT9467_REG_CHG_IRQ1_CTRL	0x63
+
+#define RT9467_MASK_PWR_RDY		BIT(7)
+#define RT9467_MASK_MIVR_STAT		BIT(6)
+#define RT9467_MASK_OTG_CSEL		GENMASK(2, 0)
+#define RT9467_MASK_OTG_VSEL		GENMASK(7, 2)
+#define RT9467_MASK_OTG_EN		BIT(0)
+#define RT9467_MASK_ADC_IN_SEL		GENMASK(7, 4)
+#define RT9467_MASK_ADC_START		BIT(0)
+
+#define RT9467_NUM_IRQ_REGS		4
+#define RT9467_ICHG_MIN_uA		100000
+#define RT9467_ICHG_MAX_uA		5000000
+#define RT9467_CV_MAX_uV		4710000
+#define RT9467_OTG_MIN_uV		4425000
+#define RT9467_OTG_MAX_uV		5825000
+#define RT9467_OTG_STEP_uV		25000
+#define RT9467_NUM_VOTG			(RT9467_OTG_MAX_uV - RT9467_OTG_MIN_uV + 1)
+#define RT9467_AICLVTH_GAP_uV		200000
+#define RT9467_ADCCONV_TIME_MS		35
+
+#define RT9466_VID			0x8
+#define RT9467_VID			0x9
+
+/* IRQ number */
+#define RT9467_IRQ_TS_STATC	0
+#define RT9467_IRQ_CHG_FAULT	1
+#define RT9467_IRQ_CHG_STATC	2
+#define RT9467_IRQ_CHG_TMR	3
+#define RT9467_IRQ_CHG_BATABS	4
+#define RT9467_IRQ_CHG_ADPBAD	5
+#define RT9467_IRQ_CHG_RVP	6
+#define RT9467_IRQ_OTP		7
+
+#define RT9467_IRQ_CHG_AICLM	8
+#define RT9467_IRQ_CHG_ICHGM	9
+#define RT9467_IRQ_WDTMR	11
+#define RT9467_IRQ_SSFINISH	12
+#define RT9467_IRQ_CHG_RECHG	13
+#define RT9467_IRQ_CHG_TERM	14
+#define RT9467_IRQ_CHG_IEOC	15
+
+#define RT9467_IRQ_ADC_DONE	16
+#define RT9467_IRQ_PUMPX_DONE	17
+#define RT9467_IRQ_BST_BATUV	21
+#define RT9467_IRQ_BST_MIDOV	22
+#define RT9467_IRQ_BST_OLP	23
+
+#define RT9467_IRQ_ATTACH	24
+#define RT9467_IRQ_DETACH	25
+#define RT9467_IRQ_HVDCP_DET	29
+#define RT9467_IRQ_CHGDET	30
+#define RT9467_IRQ_DCDT		31
+
+enum rt9467_fields {
+	/* RT9467_REG_CORE_CTRL0 */
+	F_RST = 0,
+	/* RT9467_REG_CHG_CTRL1 */
+	F_HZ, F_OTG_PIN_EN, F_OPA_MODE,
+	/* RT9467_REG_CHG_CTRL2 */
+	F_SHIP_MODE, F_TE, F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
+	/* RT9467_REG_CHG_CTRL3 */
+	F_IAICR, F_ILIM_EN,
+	/* RT9467_REG_CHG_CTRL4 */
+	F_VOREG,
+	/* RT9467_REG_CHG_CTRL6 */
+	F_VMIVR,
+	/* RT9467_REG_CHG_CTRL7 */
+	F_ICHG,
+	/* RT9467_REG_CHG_CTRL8 */
+	F_IPREC,
+	/* RT9467_REG_CHG_CTRL9 */
+	F_IEOC,
+	/* RT9467_REG_CHG_CTRL12 */
+	F_WT_FC,
+	/* RT9467_REG_CHG_CTRL13 */
+	F_OCP,
+	/* RT9467_REG_CHG_CTRL14 */
+	F_AICL_MEAS, F_AICL_VTH,
+	/* RT9467_REG_CHG_DPDM1 */
+	F_USBCHGEN,
+	/* RT9467_REG_CHG_DPDM2 */
+	F_USB_STATUS,
+	/* RT9467_REG_DEVICE_ID */
+	F_VENDOR,
+	/* RT9467_REG_CHG_STAT */
+	F_CHG_STAT,
+	/* RT9467_REG_CHG_STATC */
+	F_PWR_RDY, F_CHG_MIVR,
+	F_MAX_FIELDS
+};
+
+static const struct regmap_irq rt9467_irqs[] = {
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_TS_STATC, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_FAULT, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_STATC, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_TMR, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_BATABS, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_ADPBAD, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_RVP, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_OTP, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_AICLM, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_ICHGM, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_WDTMR, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_SSFINISH, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_RECHG, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_TERM, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_IEOC, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_ADC_DONE, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_PUMPX_DONE, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_BST_BATUV, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_BST_MIDOV, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_BST_OLP, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_ATTACH, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_DETACH, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_HVDCP_DET, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHGDET, 8),
+	REGMAP_IRQ_REG_LINE(RT9467_IRQ_DCDT, 8)
+};
+
+static const struct regmap_irq_chip rt9467_irq_chip = {
+	.name = "rt9467-irqs",
+	.status_base = RT9467_REG_CHG_IRQ1,
+	.mask_base = RT9467_REG_CHG_IRQ1_CTRL,
+	.num_regs = RT9467_NUM_IRQ_REGS,
+	.irqs = rt9467_irqs,
+	.num_irqs = ARRAY_SIZE(rt9467_irqs),
+};
+
+enum rt9467_ranges {
+	RT9467_RANGE_IAICR = 0,
+	RT9467_RANGE_VOREG,
+	RT9467_RANGE_VMIVR,
+	RT9467_RANGE_ICHG,
+	RT9467_RANGE_IPREC,
+	RT9467_RANGE_IEOC,
+	RT9467_RANGE_AICL_VTH,
+	RT9467_RANGES_MAX
+};
+
+static const struct linear_range rt9467_ranges[RT9467_RANGES_MAX] = {
+	LINEAR_RANGE_IDX(RT9467_RANGE_IAICR, 100000, 0x0, 0x3F, 50000),
+	LINEAR_RANGE_IDX(RT9467_RANGE_VOREG, 3900000, 0x0, 0x51, 10000),
+	LINEAR_RANGE_IDX(RT9467_RANGE_VMIVR, 3900000, 0x0, 0x5F, 100000),
+	LINEAR_RANGE_IDX(RT9467_RANGE_ICHG, 900000, 0x08, 0x31, 100000),
+	LINEAR_RANGE_IDX(RT9467_RANGE_IPREC, 100000, 0x0, 0x0F, 50000),
+	LINEAR_RANGE_IDX(RT9467_RANGE_IEOC, 100000, 0x0, 0x0F, 50000),
+	LINEAR_RANGE_IDX(RT9467_RANGE_AICL_VTH, 4100000, 0x0, 0x7, 100000),
+};
+
+static const struct reg_field rt9467_chg_fields[] = {
+	[F_RST]			= REG_FIELD(RT9467_REG_CORE_CTRL0, 7, 7),
+	[F_HZ]			= REG_FIELD(RT9467_REG_CHG_CTRL1, 2, 2),
+	[F_OTG_PIN_EN]		= REG_FIELD(RT9467_REG_CHG_CTRL1, 1, 1),
+	[F_OPA_MODE]		= REG_FIELD(RT9467_REG_CHG_CTRL1, 0, 0),
+	[F_SHIP_MODE]		= REG_FIELD(RT9467_REG_CHG_CTRL2, 7, 7),
+	[F_TE]			= REG_FIELD(RT9467_REG_CHG_CTRL2, 4, 4),
+	[F_IINLMTSEL]		= REG_FIELD(RT9467_REG_CHG_CTRL2, 2, 3),
+	[F_CFO_EN]		= REG_FIELD(RT9467_REG_CHG_CTRL2, 1, 1),
+	[F_CHG_EN]		= REG_FIELD(RT9467_REG_CHG_CTRL2, 0, 0),
+	[F_IAICR]		= REG_FIELD(RT9467_REG_CHG_CTRL3, 2, 7),
+	[F_ILIM_EN]		= REG_FIELD(RT9467_REG_CHG_CTRL3, 0, 0),
+	[F_VOREG]		= REG_FIELD(RT9467_REG_CHG_CTRL4, 1, 7),
+	[F_VMIVR]		= REG_FIELD(RT9467_REG_CHG_CTRL6, 1, 7),
+	[F_ICHG]		= REG_FIELD(RT9467_REG_CHG_CTRL7, 2, 7),
+	[F_IPREC]		= REG_FIELD(RT9467_REG_CHG_CTRL8, 0, 3),
+	[F_IEOC]		= REG_FIELD(RT9467_REG_CHG_CTRL9, 4, 7),
+	[F_WT_FC]		= REG_FIELD(RT9467_REG_CHG_CTRL12, 5, 7),
+	[F_OCP]			= REG_FIELD(RT9467_REG_CHG_CTRL13, 2, 2),
+	[F_AICL_MEAS]		= REG_FIELD(RT9467_REG_CHG_CTRL14, 7, 7),
+	[F_AICL_VTH]		= REG_FIELD(RT9467_REG_CHG_CTRL14, 0, 2),
+	[F_USBCHGEN]		= REG_FIELD(RT9467_REG_CHG_DPDM1, 7, 7),
+	[F_USB_STATUS]		= REG_FIELD(RT9467_REG_CHG_DPDM2, 0, 2),
+	[F_VENDOR]		= REG_FIELD(RT9467_REG_DEVICE_ID, 4, 7),
+	[F_CHG_STAT]		= REG_FIELD(RT9467_REG_CHG_STAT, 6, 7),
+	[F_PWR_RDY]		= REG_FIELD(RT9467_REG_CHG_STATC, 7, 7),
+	[F_CHG_MIVR]		= REG_FIELD(RT9467_REG_CHG_STATC, 6, 6),
+};
+
+enum {
+	RT9467_STAT_READY = 0,
+	RT9467_STAT_PROGRESS,
+	RT9467_STAT_CHARGE_DONE,
+	RT9467_STAT_FAULT
+};
+
+enum rt9467_adc_chan {
+	RT9467_ADC_VBUS_DIV5 = 0,
+	RT9467_ADC_VBUS_DIV2,
+	RT9467_ADC_VSYS,
+	RT9467_ADC_VBAT,
+	RT9467_ADC_TS_BAT,
+	RT9467_ADC_IBUS,
+	RT9467_ADC_IBAT,
+	RT9467_ADC_REGN,
+	RT9467_ADC_TEMP_JC
+};
+
+enum rt9467_chg_type {
+	RT9467_CHG_TYPE_NOVBUS = 0,
+	RT9467_CHG_TYPE_UNDER_GOING,
+	RT9467_CHG_TYPE_SDP,
+	RT9467_CHG_TYPE_SDPNSTD,
+	RT9467_CHG_TYPE_DCP,
+	RT9467_CHG_TYPE_CDP,
+	RT9467_CHG_TYPE_MAX
+};
+
+enum rt9467_iin_limit_sel {
+	RT9467_IINLMTSEL_3_2A = 0,
+	RT9467_IINLMTSEL_CHG_TYP,
+	RT9467_IINLMTSEL_AICR,
+	RT9467_IINLMTSEL_LOWER_LEVEL, /* lower of above three */
+};
+
+struct rt9467_chg_data {
+	struct device *dev;
+	struct regmap *regmap;
+	struct regmap_field *rm_field[F_MAX_FIELDS];
+	struct regmap_irq_chip_data *irq_chip_data;
+	struct power_supply *psy;
+	struct mutex adc_lock;
+	struct mutex attach_lock;
+	struct mutex ichg_ieoc_lock;
+	struct regulator_dev *rdev;
+	struct completion aicl_done;
+	enum power_supply_usb_type psy_usb_type;
+	unsigned int old_stat;
+	unsigned int vid;
+	int ichg_ua;
+	int ieoc_ua;
+};
+
+static int rt9467_otg_of_parse_cb(struct device_node *of,
+				  const struct regulator_desc *desc,
+				  struct regulator_config *cfg)
+{
+	struct rt9467_chg_data *data = cfg->driver_data;
+
+	cfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
+						"enable", 0, GPIOD_OUT_LOW |
+						GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+						desc->name);
+	if (IS_ERR(cfg->ena_gpiod)) {
+		cfg->ena_gpiod = NULL;
+		return 0;
+	}
+
+	return regmap_field_write(data->rm_field[F_OTG_PIN_EN], 1);
+}
+
+static const struct regulator_ops rt9467_otg_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_current_limit = regulator_set_current_limit_regmap,
+	.get_current_limit = regulator_get_current_limit_regmap,
+};
+
+static const u32 rt9467_otg_microamp[] = {
+	500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000, 3000000
+};
+
+static const struct regulator_desc rt9467_otg_desc = {
+	.name = "rt9476-usb-otg-vbus",
+	.of_match = "usb-otg-vbus-regulator",
+	.of_parse_cb = rt9467_otg_of_parse_cb,
+	.type = REGULATOR_VOLTAGE,
+	.owner = THIS_MODULE,
+	.min_uV = RT9467_OTG_MIN_uV,
+	.uV_step = RT9467_OTG_STEP_uV,
+	.n_voltages = RT9467_NUM_VOTG,
+	.curr_table = rt9467_otg_microamp,
+	.n_current_limits = ARRAY_SIZE(rt9467_otg_microamp),
+	.csel_reg = RT9467_REG_CHG_CTRL10,
+	.csel_mask = RT9467_MASK_OTG_CSEL,
+	.vsel_reg = RT9467_REG_CHG_CTRL5,
+	.vsel_mask = RT9467_MASK_OTG_VSEL,
+	.enable_reg = RT9467_REG_CHG_CTRL1,
+	.enable_mask = RT9467_MASK_OTG_EN,
+	.ops = &rt9467_otg_regulator_ops,
+};
+
+static int rt9467_register_otg_regulator(struct rt9467_chg_data *data)
+{
+	struct regulator_config cfg = {
+		.dev = data->dev,
+		.regmap = data->regmap,
+		.driver_data = data,
+	};
+
+	data->rdev = devm_regulator_register(data->dev, &rt9467_otg_desc, &cfg);
+	return PTR_ERR_OR_ZERO(data->rdev);
+}
+
+static int rt9467_get_value_from_ranges(struct rt9467_chg_data *data,
+					enum rt9467_fields field,
+					enum rt9467_ranges rsel,
+					int *value)
+{
+	const struct linear_range *range = rt9467_ranges + rsel;
+	unsigned int sel;
+	int ret;
+
+	ret = regmap_field_read(data->rm_field[field], &sel);
+	if (ret)
+		return ret;
+
+	return linear_range_get_value(range, sel, value);
+}
+
+static int rt9467_set_value_from_ranges(struct rt9467_chg_data *data,
+					enum rt9467_fields field,
+					enum rt9467_ranges rsel,
+					int value)
+{
+	const struct linear_range *range = rt9467_ranges + rsel;
+	unsigned int sel;
+	bool found;
+	int ret;
+
+	if (rsel == RT9467_RANGE_VMIVR) {
+		ret = linear_range_get_selector_high(range, value, &sel, &found);
+		if (ret)
+			value = range->max_sel;
+	} else {
+		linear_range_get_selector_within(range, value, &sel);
+	}
+
+	return regmap_field_write(data->rm_field[field], sel);
+}
+
+static int rt9467_get_adc_sel(enum rt9467_adc_chan chan, int *sel)
+{
+	switch (chan) {
+	case RT9467_ADC_VBUS_DIV5:
+	case RT9467_ADC_VBUS_DIV2:
+	case RT9467_ADC_VSYS:
+	case RT9467_ADC_VBAT:
+		*sel = chan + 1;
+		return 0;
+	case RT9467_ADC_TS_BAT:
+		*sel = chan + 2;
+		return 0;
+	case RT9467_ADC_IBUS:
+	case RT9467_ADC_IBAT:
+		*sel = chan + 3;
+		return 0;
+	case RT9467_ADC_REGN:
+	case RT9467_ADC_TEMP_JC:
+		*sel = chan + 4;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int rt9467_get_adc_raw_data(struct rt9467_chg_data *data,
+				   enum rt9467_adc_chan chan, int *val)
+{
+	unsigned int adc_stat, reg_val, adc_sel;
+	__be16 chan_raw_data;
+	int ret;
+
+	mutex_lock(&data->adc_lock);
+
+	ret = rt9467_get_adc_sel(chan, &adc_sel);
+	if (ret)
+		goto adc_unlock;
+
+	ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, 0);
+	if (ret) {
+		dev_err(data->dev, "Failed to clear ADC enable\n");
+		goto adc_unlock;
+	}
+
+	reg_val = RT9467_MASK_ADC_START | FIELD_PREP(RT9467_MASK_ADC_IN_SEL, adc_sel);
+	ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, reg_val);
+	if (ret)
+		goto adc_unlock;
+
+	/* Minimum wait time for one channel processing */
+	msleep(RT9467_ADCCONV_TIME_MS);
+
+	ret = regmap_read_poll_timeout(data->regmap, RT9467_REG_CHG_ADC,
+				       adc_stat,
+				       !(adc_stat & RT9467_MASK_ADC_START),
+				       MILLI, RT9467_ADCCONV_TIME_MS * MILLI);
+	if (ret) {
+		dev_err(data->dev, "Failed to wait ADC conversion, chan = %d\n", chan);
+		goto adc_unlock;
+	}
+
+	ret = regmap_raw_read(data->regmap, RT9467_REG_ADC_DATA_H,
+			      &chan_raw_data, sizeof(chan_raw_data));
+	if (ret)
+		goto adc_unlock;
+
+	*val = be16_to_cpu(chan_raw_data);
+
+adc_unlock:
+	mutex_unlock(&data->adc_lock);
+	return ret;
+}
+
+static int rt9467_get_adc(struct rt9467_chg_data *data,
+			  enum rt9467_adc_chan chan, int *val)
+{
+	unsigned int aicr_ua, ichg_ua;
+	int ret;
+
+	ret = rt9467_get_adc_raw_data(data, chan, val);
+	if (ret)
+		return ret;
+
+	switch (chan) {
+	case RT9467_ADC_VBUS_DIV5:
+		*val *= 25000;
+		return 0;
+	case RT9467_ADC_VBUS_DIV2:
+		*val *= 10000;
+		return 0;
+	case RT9467_ADC_VBAT:
+	case RT9467_ADC_VSYS:
+	case RT9467_ADC_REGN:
+		*val *= 5000;
+		return 0;
+	case RT9467_ADC_TS_BAT:
+		*val /= 400;
+		return 0;
+	case RT9467_ADC_IBUS:
+		/* UUG MOS turn-on ratio will affect the IBUS adc scale */
+		ret = rt9467_get_value_from_ranges(data, F_IAICR,
+						   RT9467_RANGE_IAICR, &aicr_ua);
+		if (ret)
+			return ret;
+
+		*val *= aicr_ua < 400000 ? 29480 : 50000;
+		return 0;
+	case RT9467_ADC_IBAT:
+		/* PP MOS turn-on ratio will affect the ICHG adc scale */
+		ret = rt9467_get_value_from_ranges(data, F_ICHG,
+						   RT9467_RANGE_ICHG, &ichg_ua);
+		if (ret)
+			return ret;
+
+		*val *= ichg_ua <= 400000 ? 28500 :
+			ichg_ua <= 800000 ? 31500 : 500000;
+		return 0;
+	case RT9467_ADC_TEMP_JC:
+		*val = ((*val * 2) - 40) * 10;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int rt9467_psy_get_status(struct rt9467_chg_data *data, int *state)
+{
+	unsigned int status;
+	int ret;
+
+	ret = regmap_field_read(data->rm_field[F_CHG_STAT], &status);
+	if (ret)
+		return ret;
+
+	switch (status) {
+	case RT9467_STAT_READY:
+		*state = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		return 0;
+	case RT9467_STAT_PROGRESS:
+		*state = POWER_SUPPLY_STATUS_CHARGING;
+		return 0;
+	case RT9467_STAT_CHARGE_DONE:
+		*state = POWER_SUPPLY_STATUS_FULL;
+		return 0;
+	default:
+		*state = POWER_SUPPLY_STATUS_UNKNOWN;
+		return 0;
+	}
+}
+
+static int rt9467_psy_set_ichg(struct rt9467_chg_data *data, int microamp)
+{
+	int ret;
+
+	mutex_lock(&data->ichg_ieoc_lock);
+
+	if (microamp < 500000) {
+		dev_err(data->dev, "Minimum value must be 500mA\n");
+		microamp = 500000;
+	}
+
+	ret = rt9467_set_value_from_ranges(data, F_ICHG, RT9467_RANGE_ICHG, microamp);
+	if (ret)
+		goto out;
+
+	ret = rt9467_get_value_from_ranges(data, F_ICHG, RT9467_RANGE_ICHG,
+					   &data->ichg_ua);
+	if (ret)
+		goto out;
+
+out:
+	mutex_unlock(&data->ichg_ieoc_lock);
+	return ret;
+}
+
+static int rt9467_run_aicl(struct rt9467_chg_data *data)
+{
+	unsigned int statc, aicl_vth;
+	int mivr_vth, aicr_get;
+	int ret = 0;
+
+
+	ret = regmap_read(data->regmap, RT9467_REG_CHG_STATC, &statc);
+	if (ret) {
+		dev_err(data->dev, "Failed to read status\n");
+		return ret;
+	}
+
+	if (!(statc & RT9467_MASK_PWR_RDY) || !(statc & RT9467_MASK_MIVR_STAT)) {
+		dev_info(data->dev, "Condition not matched %d\n", statc);
+		return 0;
+	}
+
+	ret = rt9467_get_value_from_ranges(data, F_VMIVR, RT9467_RANGE_VMIVR,
+					   &mivr_vth);
+	if (ret) {
+		dev_err(data->dev, "Failed to get mivr\n");
+		return ret;
+	}
+
+	/* AICL_VTH = MIVR_VTH + 200mV */
+	aicl_vth = mivr_vth + RT9467_AICLVTH_GAP_uV;
+	ret = rt9467_set_value_from_ranges(data, F_AICL_VTH,
+					   RT9467_RANGE_AICL_VTH, aicl_vth);
+
+	/* Trigger AICL function */
+	ret = regmap_field_write(data->rm_field[F_AICL_MEAS], 1);
+	if (ret) {
+		dev_err(data->dev, "Failed to set aicl measurement\n");
+		return ret;
+	}
+
+	reinit_completion(&data->aicl_done);
+	ret = wait_for_completion_timeout(&data->aicl_done, msecs_to_jiffies(3500));
+	if (ret)
+		return ret;
+
+	ret = rt9467_get_value_from_ranges(data, F_IAICR, RT9467_RANGE_IAICR, &aicr_get);
+	if (ret) {
+		dev_err(data->dev, "Failed to get aicr\n");
+		return ret;
+	}
+
+	dev_info(data->dev, "aicr get = %d uA\n", aicr_get);
+	return 0;
+}
+
+static int rt9467_psy_set_ieoc(struct rt9467_chg_data *data, int microamp)
+{
+	int ret;
+
+	mutex_lock(&data->ichg_ieoc_lock);
+
+	ret = rt9467_set_value_from_ranges(data, F_IEOC, RT9467_RANGE_IEOC, microamp);
+	if (ret)
+		goto out;
+
+	ret = rt9467_get_value_from_ranges(data, F_IEOC, RT9467_RANGE_IEOC, &data->ieoc_ua);
+	if (ret)
+		goto out;
+
+out:
+	mutex_unlock(&data->ichg_ieoc_lock);
+	return ret;
+}
+
+static const enum power_supply_usb_type rt9467_chg_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+};
+
+static const enum power_supply_property rt9467_chg_properties[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+	POWER_SUPPLY_PROP_USB_TYPE,
+	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+};
+
+static int rt9467_psy_get_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	struct rt9467_chg_data *data = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return rt9467_psy_get_status(data, &val->intval);
+	case POWER_SUPPLY_PROP_ONLINE:
+		return regmap_field_read(data->rm_field[F_PWR_RDY], &val->intval);
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		mutex_lock(&data->attach_lock);
+		if (data->psy_usb_type == POWER_SUPPLY_USB_TYPE_UNKNOWN ||
+		    data->psy_usb_type == POWER_SUPPLY_USB_TYPE_SDP)
+			val->intval = 500000;
+		else
+			val->intval = 1500000;
+		mutex_unlock(&data->attach_lock);
+		return 0;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		mutex_lock(&data->ichg_ieoc_lock);
+		val->intval = data->ichg_ua;
+		mutex_unlock(&data->ichg_ieoc_lock);
+		return 0;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		val->intval = RT9467_ICHG_MAX_uA;
+		return 0;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return rt9467_get_value_from_ranges(data, F_VOREG,
+						    RT9467_RANGE_VOREG,
+						    &val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		val->intval = RT9467_CV_MAX_uV;
+		return 0;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return rt9467_get_value_from_ranges(data, F_IAICR,
+						    RT9467_RANGE_IAICR,
+						    &val->intval);
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		return rt9467_get_value_from_ranges(data, F_VMIVR,
+						    RT9467_RANGE_VMIVR,
+						    &val->intval);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		mutex_lock(&data->attach_lock);
+		val->intval = data->psy_usb_type;
+		mutex_unlock(&data->attach_lock);
+		return 0;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		return rt9467_get_value_from_ranges(data, F_IPREC,
+						    RT9467_RANGE_IPREC,
+						    &val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		mutex_lock(&data->ichg_ieoc_lock);
+		val->intval = data->ieoc_ua;
+		mutex_unlock(&data->ichg_ieoc_lock);
+		return 0;
+	default:
+		return -ENODATA;
+	}
+}
+
+static int rt9467_psy_set_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   const union power_supply_propval *val)
+{
+	struct rt9467_chg_data *data = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return regmap_field_write(data->rm_field[F_CHG_EN], val->intval);
+	case POWER_SUPPLY_PROP_ONLINE:
+		return regmap_field_write(data->rm_field[F_HZ], val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return rt9467_psy_set_ichg(data, val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return rt9467_set_value_from_ranges(data, F_VOREG,
+						    RT9467_RANGE_VOREG, val->intval);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		if (val->intval == -1)
+			return rt9467_run_aicl(data);
+		else
+			return rt9467_set_value_from_ranges(data, F_IAICR,
+							    RT9467_RANGE_IAICR,
+							    val->intval);
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		return rt9467_set_value_from_ranges(data, F_VMIVR,
+						    RT9467_RANGE_VMIVR, val->intval);
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		return rt9467_set_value_from_ranges(data, F_IPREC,
+						    RT9467_RANGE_IPREC, val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return rt9467_psy_set_ieoc(data, val->intval);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return regmap_field_write(data->rm_field[F_USBCHGEN], val->intval);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int rt9467_chg_prop_is_writeable(struct power_supply *psy,
+					enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+	case POWER_SUPPLY_PROP_ONLINE:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static const struct power_supply_desc rt9467_chg_psy_desc = {
+	.name = "rt9467-charger",
+	.type = POWER_SUPPLY_TYPE_USB,
+	.usb_types = rt9467_chg_usb_types,
+	.num_usb_types = ARRAY_SIZE(rt9467_chg_usb_types),
+	.properties = rt9467_chg_properties,
+	.num_properties = ARRAY_SIZE(rt9467_chg_properties),
+	.property_is_writeable = rt9467_chg_prop_is_writeable,
+	.get_property = rt9467_psy_get_property,
+	.set_property = rt9467_psy_set_property,
+};
+
+static inline struct rt9467_chg_data *psy_device_to_chip(struct device *dev)
+{
+	return power_supply_get_drvdata(to_power_supply(dev));
+}
+
+static ssize_t sysoff_enable_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct rt9467_chg_data *data = psy_device_to_chip(dev);
+	unsigned int sysoff_enable;
+	int ret;
+
+	ret = regmap_field_read(data->rm_field[F_SHIP_MODE], &sysoff_enable);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%d\n", sysoff_enable);
+}
+
+static ssize_t sysoff_enable_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct rt9467_chg_data *data = psy_device_to_chip(dev);
+	unsigned int tmp;
+	int ret;
+
+	ret = kstrtouint(buf, 10, &tmp);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(data->rm_field[F_SHIP_MODE], !!tmp);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(sysoff_enable);
+
+static struct attribute *rt9467_sysfs_attrs[] = {
+	&dev_attr_sysoff_enable.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(rt9467_sysfs);
+
+static int rt9467_register_psy(struct rt9467_chg_data *data)
+{
+	struct power_supply_config cfg = {
+		.drv_data = data,
+		.of_node = dev_of_node(data->dev),
+		.attr_grp = rt9467_sysfs_groups,
+	};
+
+	data->psy = devm_power_supply_register(data->dev, &rt9467_chg_psy_desc,
+					       &cfg);
+	return PTR_ERR_OR_ZERO(data->psy);
+}
+
+static int rt9467_mivr_handler(struct rt9467_chg_data *data)
+{
+	unsigned int mivr_act;
+	int ret, ibus_ma;
+
+	/*
+	 * back-boost workaround
+	 * If (mivr_active & ibus < 100mA), toggle cfo bit
+	 */
+	ret = regmap_field_read(data->rm_field[F_CHG_MIVR], &mivr_act);
+	if (ret) {
+		dev_err(data->dev, "Failed to read MIVR stat\n");
+		return ret;
+	}
+
+	if (!mivr_act)
+		return 0;
+
+	ret = rt9467_get_adc(data, RT9467_ADC_IBUS, &ibus_ma);
+	if (ret) {
+		dev_err(data->dev, "Failed to get IBUS\n");
+		return ret;
+	}
+
+	if (ibus_ma < 100000) {
+		ret = regmap_field_write(data->rm_field[F_CFO_EN], 0);
+		ret |= regmap_field_write(data->rm_field[F_CFO_EN], 1);
+		if (ret)
+			dev_err(data->dev, "Failed to toggle cfo\n");
+	}
+
+	return ret;
+}
+
+static irqreturn_t rt9467_statc_handler(int irq, void *priv)
+{
+	struct rt9467_chg_data *data = priv;
+	unsigned int new_stat, evts = 0;
+	int ret;
+
+	ret = regmap_read(data->regmap, RT9467_REG_CHG_STATC, &new_stat);
+	if (ret) {
+		dev_err(data->dev, "Failed to read chg_statc\n");
+		return IRQ_NONE;
+	}
+
+	evts = data->old_stat ^ new_stat;
+	data->old_stat = new_stat;
+
+	if ((evts & new_stat) & RT9467_MASK_MIVR_STAT) {
+		ret = rt9467_mivr_handler(data);
+		if (ret)
+			dev_err(data->dev, "Failed to handle mivr stat\n");
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t rt9467_wdt_handler(int irq, void *priv)
+{
+	struct rt9467_chg_data *data = priv;
+	unsigned int dev_id;
+	int ret;
+
+	/* Any i2c communication can kick watchdog timer */
+	ret = regmap_read(data->regmap, RT9467_REG_DEVICE_ID, &dev_id);
+	if (ret) {
+		dev_err(data->dev, "Failed to kick wdt (%d)\n", ret);
+		return IRQ_NONE;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int rt9467_report_usb_state(struct rt9467_chg_data *data)
+{
+	unsigned int usb_stat, power_ready;
+	bool psy_changed = true;
+	int ret;
+
+	ret = regmap_field_read(data->rm_field[F_USB_STATUS], &usb_stat);
+	ret |= regmap_field_read(data->rm_field[F_PWR_RDY], &power_ready);
+	if (ret)
+		return ret;
+
+	if (!power_ready)
+		usb_stat = RT9467_CHG_TYPE_NOVBUS;
+
+	mutex_lock(&data->attach_lock);
+
+	switch (usb_stat) {
+	case RT9467_CHG_TYPE_NOVBUS:
+		data->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		break;
+	case RT9467_CHG_TYPE_SDP:
+		data->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case RT9467_CHG_TYPE_SDPNSTD:
+		data->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case RT9467_CHG_TYPE_DCP:
+		data->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case RT9467_CHG_TYPE_CDP:
+		data->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	case RT9467_CHG_TYPE_UNDER_GOING:
+	default:
+		psy_changed = false;
+		break;
+	}
+
+	mutex_unlock(&data->attach_lock);
+
+	if (psy_changed)
+		power_supply_changed(data->psy);
+
+	return 0;
+}
+
+static irqreturn_t rt9467_usb_state_handler(int irq, void *priv)
+{
+	struct rt9467_chg_data *data = priv;
+	int ret;
+
+	ret = rt9467_report_usb_state(data);
+	if (ret) {
+		dev_err(data->dev, "Failed to report attach type (%d)\n", ret);
+		return IRQ_NONE;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t rt9467_aiclmeas_handler(int irq, void *priv)
+{
+	struct rt9467_chg_data *data = priv;
+
+	complete(&data->aicl_done);
+	return IRQ_HANDLED;
+}
+
+#define RT9467_IRQ_DESC(_name, _handler_func, _hwirq)		\
+{								\
+	.name = #_name,						\
+	.handler = rt9467_##_handler_func##_handler,		\
+	.hwirq = _hwirq,					\
+}
+
+static int rt9467_request_interrupt(struct rt9467_chg_data *data)
+{
+	struct device *dev = data->dev;
+	static const struct {
+		const char *name;
+		int hwirq;
+		irq_handler_t handler;
+	} rt9467_exclusive_irqs[] = {
+		RT9467_IRQ_DESC(statc, statc, RT9467_IRQ_TS_STATC),
+		RT9467_IRQ_DESC(wdt, wdt, RT9467_IRQ_WDTMR),
+		RT9467_IRQ_DESC(attach, usb_state, RT9467_IRQ_ATTACH),
+		RT9467_IRQ_DESC(detach,	usb_state, RT9467_IRQ_DETACH),
+		RT9467_IRQ_DESC(aiclmeas, aiclmeas, RT9467_IRQ_CHG_AICLM),
+	}, rt9466_exclusive_irqs[] = {
+		RT9467_IRQ_DESC(statc, statc, RT9467_IRQ_TS_STATC),
+		RT9467_IRQ_DESC(wdt, wdt, RT9467_IRQ_WDTMR),
+		RT9467_IRQ_DESC(aiclmeas, aiclmeas, RT9467_IRQ_CHG_AICLM),
+	}, *chg_irqs;
+	int num_chg_irqs, i, virq, ret;
+
+	if (data->vid == RT9466_VID) {
+		chg_irqs = rt9466_exclusive_irqs;
+		num_chg_irqs = ARRAY_SIZE(rt9466_exclusive_irqs);
+	} else {
+		chg_irqs = rt9467_exclusive_irqs;
+		num_chg_irqs = ARRAY_SIZE(rt9467_exclusive_irqs);
+	}
+
+	for (i = 0; i < num_chg_irqs; i++) {
+		virq = regmap_irq_get_virq(data->irq_chip_data, chg_irqs[i].hwirq);
+		if (virq <= 0)
+			return dev_err_probe(dev, virq, "Failed to get (%s) irq\n",
+					     chg_irqs[i].name);
+
+		ret = devm_request_threaded_irq(dev, virq, NULL, chg_irqs[i].handler,
+						IRQF_ONESHOT, chg_irqs[i].name, data);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to request (%s) irq\n",
+					     chg_irqs[i].name);
+	}
+
+	return 0;
+}
+
+static int rt9467_do_charger_init(struct rt9467_chg_data *data)
+{
+	struct device *dev = data->dev;
+	int ret;
+
+	ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to reset ADC\n");
+
+	ret = rt9467_get_value_from_ranges(data, F_ICHG, RT9467_RANGE_ICHG,
+					   &data->ichg_ua);
+	ret |= rt9467_get_value_from_ranges(data, F_IEOC, RT9467_RANGE_IEOC,
+					    &data->ieoc_ua);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init ichg/ieoc value\n");
+
+	ret = regmap_update_bits(data->regmap, RT9467_REG_CHG_STATC_CTRL,
+				 RT9467_MASK_PWR_RDY | RT9467_MASK_MIVR_STAT, 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to make statc unmask\n");
+
+	/* Select IINLMTSEL to use AICR */
+	ret = regmap_field_write(data->rm_field[F_IINLMTSEL],
+				 RT9467_IINLMTSEL_AICR);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set iinlmtsel to AICR\n");
+
+	/* Wait for AICR Rampping */
+	msleep(150);
+
+	/* Disable hardware ILIM */
+	ret = regmap_field_write(data->rm_field[F_ILIM_EN], 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to disable hardware ILIM\n");
+
+	/* Set inductor OCP to high level */
+	ret = regmap_field_write(data->rm_field[F_OCP], 1);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set higher inductor OCP level\n");
+
+	/* Set charge termination default enable */
+	ret = regmap_field_write(data->rm_field[F_TE], 1);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set TE=1\n");
+
+	/* Set 12hrs fast charger timer */
+	ret = regmap_field_write(data->rm_field[F_WT_FC], 4);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set WT_FC\n");
+
+	/* Toggle BC12 function */
+	ret = regmap_field_write(data->rm_field[F_USBCHGEN], 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to disable BC12\n");
+
+	return regmap_field_write(data->rm_field[F_USBCHGEN], 1);
+}
+
+static bool rt9467_is_accessible_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x1A:
+	case 0x20 ... 0x38:
+	case 0x40 ... 0x49:
+	case 0x50 ... 0x57:
+	case 0x60 ... 0x67:
+	case 0x70 ... 0x79:
+	case 0x82 ... 0x85:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rt9467_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x85,
+	.writeable_reg = rt9467_is_accessible_reg,
+	.readable_reg = rt9467_is_accessible_reg,
+};
+
+static int rt9467_check_vendor_info(struct rt9467_chg_data *data)
+{
+	unsigned int vid;
+	int ret;
+
+	ret = regmap_field_read(data->rm_field[F_VENDOR], &vid);
+	if (ret) {
+		dev_err(data->dev, "Failed to get vid\n");
+		return ret;
+	}
+
+	if ((vid != RT9466_VID) && (vid != RT9467_VID))
+		return dev_err_probe(data->dev, -ENODEV,
+				     "VID not correct [0x%02X]\n", vid);
+
+	data->vid = vid;
+	return 0;
+}
+
+static int rt9467_reset_chip(struct rt9467_chg_data *data)
+{
+	int ret;
+
+	/* Disable HZ before reset chip */
+	ret = regmap_field_write(data->rm_field[F_HZ], 0);
+	if (ret)
+		return ret;
+
+	return regmap_field_write(data->rm_field[F_RST], 1);
+}
+
+static void rt9467_chg_destroy_adc_lock(void *data)
+{
+	struct mutex *adc_lock = data;
+
+	mutex_destroy(adc_lock);
+}
+
+static void rt9467_chg_destroy_attach_lock(void *data)
+{
+	struct mutex *attach_lock = data;
+
+	mutex_destroy(attach_lock);
+}
+
+static void rt9467_chg_destroy_ichg_ieoc_lock(void *data)
+{
+	struct mutex *ichg_ieoc_lock = data;
+
+	mutex_destroy(ichg_ieoc_lock);
+}
+
+static void rt9467_chg_complete_aicl_done(void *data)
+{
+	struct completion *aicl_done = data;
+
+	complete(aicl_done);
+}
+
+static int rt9467_charger_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct rt9467_chg_data *data;
+	struct gpio_desc *ceb_gpio;
+	int ret;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->dev = &i2c->dev;
+	i2c_set_clientdata(i2c, data);
+
+	/* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
+	ceb_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_LOW);
+	if (IS_ERR(ceb_gpio))
+		return dev_err_probe(dev, PTR_ERR(ceb_gpio),
+				     "Failed to config charge enable gpio\n");
+
+	data->regmap = devm_regmap_init_i2c(i2c, &rt9467_regmap_config);
+	if (IS_ERR(data->regmap))
+		return dev_err_probe(dev, PTR_ERR(data->regmap),
+				     "Failed to init regmap\n");
+
+	ret = devm_regmap_field_bulk_alloc(dev, data->regmap,
+					   data->rm_field, rt9467_chg_fields,
+					   ARRAY_SIZE(rt9467_chg_fields));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to alloc regmap fields\n");
+
+	ret = rt9467_check_vendor_info(data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to check vendor info");
+
+	ret = rt9467_reset_chip(data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to reset chip\n");
+
+	ret = devm_regmap_add_irq_chip(dev, data->regmap, i2c->irq,
+				       IRQF_TRIGGER_LOW | IRQF_ONESHOT, 0,
+				       &rt9467_irq_chip, &data->irq_chip_data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add irq chip\n");
+
+	mutex_init(&data->adc_lock);
+	ret = devm_add_action_or_reset(dev, rt9467_chg_destroy_adc_lock,
+				       &data->adc_lock);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init ADC lock\n");
+
+	mutex_init(&data->attach_lock);
+	ret = devm_add_action_or_reset(dev, rt9467_chg_destroy_attach_lock,
+				       &data->attach_lock);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init attach lock\n");
+
+	mutex_init(&data->ichg_ieoc_lock);
+	ret = devm_add_action_or_reset(dev, rt9467_chg_destroy_ichg_ieoc_lock,
+				       &data->ichg_ieoc_lock);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init ICHG/IEOC lock\n");
+
+	init_completion(&data->aicl_done);
+	ret = devm_add_action_or_reset(dev, rt9467_chg_complete_aicl_done,
+				       &data->aicl_done);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init AICL done completion\n");
+
+	ret = rt9467_do_charger_init(data);
+	if (ret)
+		return ret;
+
+	ret = rt9467_register_otg_regulator(data);
+	if (ret)
+		return ret;
+
+	ret = rt9467_register_psy(data);
+	if (ret)
+		return ret;
+
+	return rt9467_request_interrupt(data);
+}
+
+static const struct of_device_id rt9467_charger_of_match_table[] = {
+	{ .compatible = "richtek,rt9467", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rt9467_charger_of_match_table);
+
+static struct i2c_driver rt9467_charger_driver = {
+	.driver = {
+		.name = "rt9467-charger",
+		.of_match_table = rt9467_charger_of_match_table,
+	},
+	.probe_new = rt9467_charger_probe,
+};
+module_i2c_driver(rt9467_charger_driver);
+
+MODULE_DESCRIPTION("Richtek RT9467 Charger Driver");
+MODULE_AUTHOR("ChiYuan Huang <[e-mail]>");
+MODULE_AUTHOR("ChiaEn Wu <[e-mail]>");
+MODULE_LICENSE("GPL");

drivers/power/supply/rt9471.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Authors: Alina Yu <[e-mail]>
+ *          ChiYuan Huang <[e-mail]>
+ */
+
+#include <linux/bits.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kstrtox.h>
+#include <linux/linear_range.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/sysfs.h>
+
+#define RT9471_REG_OTGCFG	0x00
+#define RT9471_REG_TOP		0x01
+#define RT9471_REG_FUNC		0x02
+#define RT9471_REG_IBUS		0x03
+#define RT9471_REG_VBUS		0x04
+#define RT9471_REG_PRECHG	0x05
+#define RT9471_REG_VCHG		0x07
+#define RT9471_REG_ICHG		0x08
+#define RT9471_REG_CHGTMR	0x09
+#define RT9471_REG_EOC		0x0A
+#define RT9471_REG_INFO		0x0B
+#define RT9471_REG_JEITA	0x0C
+#define RT9471_REG_PUMP_EXP	0x0D
+#define	RT9471_REG_DPDMDET	0x0E
+#define RT9471_REG_ICSTAT	0x0F
+#define	RT9471_REG_STAT0	0x10
+#define RT9471_REG_STAT1	0x11
+#define RT9471_REG_STAT2	0x12
+#define RT9471_REG_IRQ0		0x20
+#define RT9471_REG_MASK0	0x30
+
+#define RT9471_OTGCV_MASK	GENMASK(7, 6)
+#define RT9471_OTGCC_MASK	BIT(0)
+#define RT9471_OTGEN_MASK	BIT(1)
+#define RT9471_CHGFAULT_MASK	GENMASK(4, 1)
+
+#define RT9471_NUM_IRQ_REGS	4
+#define RT9471_OTGCV_MINUV	4850000
+#define RT9471_OTGCV_STEPUV	150000
+#define RT9471_NUM_VOTG		4
+#define RT9471_VCHG_MAXUV	4700000
+#define RT9471_ICHG_MAXUA	3150000
+
+/* Device ID */
+#define RT9470_DEVID		0x09
+#define RT9470D_DEVID		0x0A
+#define RT9471_DEVID		0x0D
+#define RT9471D_DEVID		0x0E
+
+/* IRQ number */
+#define RT9471_IRQ_BC12_DONE	0
+#define RT9471_IRQ_DETACH	1
+#define RT9471_IRQ_RECHG	2
+#define RT9471_IRQ_CHG_DONE	3
+#define RT9471_IRQ_BG_CHG	4
+#define RT9471_IRQ_IE0C		5
+#define RT9471_IRQ_CHG_RDY	6
+#define RT9471_IRQ_VBUS_GD	7
+#define RT9471_IRQ_CHG_BATOV	9
+#define RT9471_IRQ_CHG_SYSOV	10
+#define RT9471_IRQ_CHG_TOUT	11
+#define RT9471_IRQ_CHG_BUSUV	12
+#define RT9471_IRQ_CHG_THREG	13
+#define RT9471_IRQ_CHG_AICR	14
+#define RT9471_IRQ_CHG_MIVR	15
+#define RT9471_IRQ_SYS_SHORT	16
+#define RT9471_IRQ_SYS_MIN	17
+#define RT9471_IRQ_AICC_DONE	18
+#define RT9471_IRQ_PE_DONE	19
+#define RT9471_IRQ_JEITA_COLD	20
+#define RT9471_IRQ_JEITA_COOL	21
+#define RT9471_IRQ_JEITA_WARM	22
+#define RT9471_IRQ_JEITA_HOT	23
+#define RT9471_IRQ_OTG_FAULT	24
+#define RT9471_IRQ_OTG_LBP	25
+#define RT9471_IRQ_OTG_CC	26
+#define RT9471_IRQ_WDT		29
+#define RT9471_IRQ_VAC_OV	30
+#define RT9471_IRQ_OTP		31
+
+enum rt9471_fields {
+	F_WDT = 0,
+	F_WDT_RST,
+	F_CHG_EN,
+	F_HZ,
+	F_BATFET_DIS,
+	F_AICR,
+	F_AICC_EN,
+	F_MIVR,
+	F_IPRE_CHG,
+	F_VPRE_CHG,
+	F_VBAT_REG,
+	F_ICHG_REG,
+	F_EOC_RST,
+	F_TE,
+	F_IEOC_CHG,
+	F_DEVICE_ID,
+	F_REG_RST,
+	F_BC12_EN,
+	F_IC_STAT,
+	F_PORT_STAT,
+	F_ST_CHG_DONE,
+	F_ST_CHG_RDY,
+	F_ST_VBUS_GD,
+	F_MAX_FIELDS
+};
+
+enum rt9471_ranges {
+	RT9471_RANGE_AICR = 0,
+	RT9471_RANGE_MIVR,
+	RT9471_RANGE_IPRE,
+	RT9471_RANGE_VCHG,
+	RT9471_RANGE_ICHG,
+	RT9471_RANGE_IEOC,
+	RT9471_MAX_RANGES
+};
+
+enum {
+	RT9471_PORTSTAT_APPLE_10W = 8,
+	RT9471_PORTSTAT_SAMSUNG_10W,
+	RT9471_PORTSTAT_APPLE_5W,
+	RT9471_PORTSTAT_APPLE_12W,
+	RT9471_PORTSTAT_NSTD,
+	RT9471_PORTSTAT_SDP,
+	RT9471_PORTSTAT_CDP,
+	RT9471_PORTSTAT_DCP,
+};
+
+struct rt9471_chip {
+	struct device *dev;
+	struct regmap *regmap;
+	struct regmap_field *rm_fields[F_MAX_FIELDS];
+	struct regmap_irq_chip_data *irq_chip_data;
+	struct regulator_dev *otg_rdev;
+	struct power_supply *psy;
+	struct power_supply_desc psy_desc;
+	struct mutex var_lock;
+	enum power_supply_usb_type psy_usb_type;
+	int psy_usb_curr;
+};
+
+static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = {
+	[F_WDT]		= REG_FIELD(RT9471_REG_TOP, 0, 0),
+	[F_WDT_RST]	= REG_FIELD(RT9471_REG_TOP, 1, 1),
+	[F_CHG_EN]	= REG_FIELD(RT9471_REG_FUNC, 0, 0),
+	[F_HZ]		= REG_FIELD(RT9471_REG_FUNC, 5, 5),
+	[F_BATFET_DIS]	= REG_FIELD(RT9471_REG_FUNC, 7, 7),
+	[F_AICR]	= REG_FIELD(RT9471_REG_IBUS, 0, 5),
+	[F_AICC_EN]	= REG_FIELD(RT9471_REG_IBUS, 7, 7),
+	[F_MIVR]	= REG_FIELD(RT9471_REG_VBUS, 0, 3),
+	[F_IPRE_CHG]	= REG_FIELD(RT9471_REG_PRECHG, 0, 3),
+	[F_VPRE_CHG]	= REG_FIELD(RT9471_REG_PRECHG, 4, 6),
+	[F_VBAT_REG]	= REG_FIELD(RT9471_REG_VCHG, 0, 6),
+	[F_ICHG_REG]	= REG_FIELD(RT9471_REG_ICHG, 0, 5),
+	[F_EOC_RST]	= REG_FIELD(RT9471_REG_EOC, 0, 0),
+	[F_TE]		= REG_FIELD(RT9471_REG_EOC, 1, 1),
+	[F_IEOC_CHG]	= REG_FIELD(RT9471_REG_EOC, 4, 7),
+	[F_DEVICE_ID]	= REG_FIELD(RT9471_REG_INFO, 3, 6),
+	[F_REG_RST]	= REG_FIELD(RT9471_REG_INFO, 7, 7),
+	[F_BC12_EN]	= REG_FIELD(RT9471_REG_DPDMDET, 7, 7),
+	[F_IC_STAT]	= REG_FIELD(RT9471_REG_ICSTAT, 0, 3),
+	[F_PORT_STAT]	= REG_FIELD(RT9471_REG_ICSTAT, 4, 7),
+	[F_ST_CHG_DONE]	= REG_FIELD(RT9471_REG_STAT0, 3, 3),
+	[F_ST_CHG_RDY]	= REG_FIELD(RT9471_REG_STAT0, 6, 6),
+	[F_ST_VBUS_GD]	= REG_FIELD(RT9471_REG_STAT0, 7, 7),
+};
+
+static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = {
+	[RT9471_RANGE_AICR] = { .min = 50000,	.min_sel = 1, .max_sel = 63, .step = 50000 },
+	[RT9471_RANGE_MIVR] = { .min = 3900000,	.min_sel = 0, .max_sel = 15, .step = 100000 },
+	[RT9471_RANGE_IPRE] = { .min = 50000,	.min_sel = 0, .max_sel = 15, .step = 50000 },
+	[RT9471_RANGE_VCHG] = { .min = 3900000,	.min_sel = 0, .max_sel = 80, .step = 10000 },
+	[RT9471_RANGE_ICHG] = { .min = 0,	.min_sel = 0, .max_sel = 63, .step = 50000 },
+	[RT9471_RANGE_IEOC] = { .min = 50000,	.min_sel = 0, .max_sel = 15, .step = 50000 },
+};
+
+static int rt9471_set_value_by_field_range(struct rt9471_chip *chip,
+					   enum rt9471_fields field,
+					   enum rt9471_ranges range, int val)
+{
+	unsigned int sel;
+
+	if (val < 0)
+		return -EINVAL;
+
+	linear_range_get_selector_within(rt9471_chg_ranges + range, val, &sel);
+
+	return regmap_field_write(chip->rm_fields[field], sel);
+}
+
+
+static int rt9471_get_value_by_field_range(struct rt9471_chip *chip,
+					   enum rt9471_fields field,
+					   enum rt9471_ranges range, int *val)
+{
+	unsigned int sel, rvalue;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[field], &sel);
+	if (ret)
+		return ret;
+
+	ret = linear_range_get_value(rt9471_chg_ranges + range, sel, &rvalue);
+	if (ret)
+		return ret;
+
+	*val = rvalue;
+	return 0;
+}
+
+static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp)
+{
+	int ret;
+
+	if (microamp == 0)
+		return regmap_field_write(chip->rm_fields[F_TE], 0);
+
+	ret = rt9471_set_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
+	if (ret)
+		return ret;
+
+	/* After applying the new IEOC value, enable charge termination */
+	return regmap_field_write(chip->rm_fields[F_TE], 1);
+}
+
+static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp)
+{
+	unsigned int chg_term_enable;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_TE], &chg_term_enable);
+	if (ret)
+		return ret;
+
+	if (!chg_term_enable) {
+		*microamp = 0;
+		return 0;
+	}
+
+	return rt9471_get_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
+}
+
+static int rt9471_get_status(struct rt9471_chip *chip, int *status)
+{
+	unsigned int chg_ready, chg_done, fault_stat;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_ST_CHG_RDY], &chg_ready);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_ST_CHG_DONE], &chg_done);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(chip->regmap, RT9471_REG_STAT1, &fault_stat);
+	if (ret)
+		return ret;
+
+	fault_stat &= RT9471_CHGFAULT_MASK;
+
+	if (chg_ready && chg_done)
+		*status = POWER_SUPPLY_STATUS_FULL;
+	else if (chg_ready && fault_stat)
+		*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	else if (chg_ready && !fault_stat)
+		*status = POWER_SUPPLY_STATUS_CHARGING;
+	else
+		*status = POWER_SUPPLY_STATUS_DISCHARGING;
+
+	return 0;
+}
+
+static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat)
+{
+	unsigned int vbus_gd;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);
+	if (ret)
+		return ret;
+
+	*stat = vbus_gd;
+	return 0;
+}
+
+static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type)
+{
+	mutex_lock(&chip->var_lock);
+	*usb_type = chip->psy_usb_type;
+	mutex_unlock(&chip->var_lock);
+
+	return 0;
+}
+
+static int rt9471_get_usb_type_current(struct rt9471_chip *chip,
+					      int *microamp)
+{
+	mutex_lock(&chip->var_lock);
+	*microamp = chip->psy_usb_curr;
+	mutex_unlock(&chip->var_lock);
+
+	return 0;
+}
+
+static enum power_supply_property rt9471_charger_properties[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+	POWER_SUPPLY_PROP_USB_TYPE,
+	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static enum power_supply_usb_type rt9471_charger_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+	POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID,
+};
+
+static int rt9471_charger_property_is_writeable(struct power_supply *psy,
+						enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+	case POWER_SUPPLY_PROP_ONLINE:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static int rt9471_charger_set_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       const union power_supply_propval *val)
+{
+	struct rt9471_chip *chip = power_supply_get_drvdata(psy);
+	int value = val->intval;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return regmap_field_write(chip->rm_fields[F_CHG_EN], !!value);
+	case POWER_SUPPLY_PROP_ONLINE:
+		return regmap_field_write(chip->rm_fields[F_HZ], !value);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return rt9471_set_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, value);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return rt9471_set_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, value);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return rt9471_set_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, value);
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		return rt9471_set_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, value);
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		return rt9471_set_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, value);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return rt9471_set_ieoc(chip, val->intval);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const char * const rt9471_manufacturer	= "Richtek Technology Corp.";
+static const char * const rt9471_model		= "RT9471";
+
+static int rt9471_charger_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct rt9471_chip *chip = power_supply_get_drvdata(psy);
+	int *pvalue = &val->intval;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return rt9471_get_status(chip, pvalue);
+	case POWER_SUPPLY_PROP_ONLINE:
+		return rt9471_get_vbus_good(chip, pvalue);
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		return rt9471_get_usb_type_current(chip, pvalue);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return rt9471_get_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, pvalue);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		*pvalue = RT9471_ICHG_MAXUA;
+		return 0;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return rt9471_get_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, pvalue);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		val->intval = RT9471_VCHG_MAXUV;
+		return 0;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return rt9471_get_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, pvalue);
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		return rt9471_get_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, pvalue);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return rt9471_get_usb_type(chip, pvalue);
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		return rt9471_get_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, pvalue);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return rt9471_get_ieoc(chip, pvalue);
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = rt9471_model;
+		return 0;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = rt9471_manufacturer;
+		return 0;
+	default:
+		return -ENODATA;
+	}
+}
+
+static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid)
+{
+	struct rt9471_chip *chip = devid;
+
+	power_supply_changed(chip->psy);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t rt9471_detach_handler(int irqno, void *devid)
+{
+	struct rt9471_chip *chip = devid;
+	unsigned int vbus_gd;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);
+	if (ret)
+		return IRQ_NONE;
+
+	/* Only focus on really detached */
+	if (vbus_gd)
+		return IRQ_HANDLED;
+
+	mutex_lock(&chip->var_lock);
+	chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+	chip->psy_usb_curr = 0;
+	mutex_unlock(&chip->var_lock);
+
+	power_supply_changed(chip->psy);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid)
+{
+	struct rt9471_chip *chip = devid;
+	enum power_supply_usb_type usb_type;
+	unsigned int port_stat;
+	int usb_curr, ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_PORT_STAT], &port_stat);
+	if (ret)
+		return IRQ_NONE;
+
+	switch (port_stat) {
+	case RT9471_PORTSTAT_APPLE_10W:
+		usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
+		usb_curr = 2000000;
+		break;
+	case RT9471_PORTSTAT_APPLE_5W:
+		usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
+		usb_curr = 1000000;
+		break;
+	case RT9471_PORTSTAT_APPLE_12W:
+		usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
+		usb_curr = 2400000;
+		break;
+	case RT9471_PORTSTAT_SAMSUNG_10W:
+		usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		usb_curr = 2000000;
+		break;
+	case RT9471_PORTSTAT_DCP:
+		usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		usb_curr = 1500000;
+		break;
+	case RT9471_PORTSTAT_NSTD:
+	case RT9471_PORTSTAT_SDP:
+		usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		usb_curr = 500000;
+		break;
+	case RT9471_PORTSTAT_CDP:
+		usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+		usb_curr = 1500000;
+		break;
+	default:
+		usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		usb_curr = 0;
+		break;
+	}
+
+	mutex_lock(&chip->var_lock);
+	chip->psy_usb_type = usb_type;
+	chip->psy_usb_curr = usb_curr;
+	mutex_unlock(&chip->var_lock);
+
+	power_supply_changed(chip->psy);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t rt9471_wdt_handler(int irqno, void *devid)
+{
+	struct rt9471_chip *chip = devid;
+	int ret;
+
+	ret = regmap_field_write(chip->rm_fields[F_WDT_RST], 1);
+
+	return ret ? IRQ_NONE : IRQ_HANDLED;
+}
+
+static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid)
+{
+	struct rt9471_chip *chip = devid;
+
+	regulator_notifier_call_chain(chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL);
+
+	return IRQ_HANDLED;
+}
+
+#define RT9471_IRQ_DESC(_name, _hwirq) \
+{ \
+	.name = #_name, \
+	.hwirq = _hwirq, \
+	.handler = rt9471_##_name##_handler, \
+}
+
+static int rt9471_register_interrupts(struct rt9471_chip *chip)
+{
+	struct device *dev = chip->dev;
+	static const struct {
+		char *name;
+		int hwirq;
+		irq_handler_t handler;
+	} chg_irqs[] = {
+		RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD),
+		RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH),
+		RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE),
+		RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT),
+		RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT),
+	}, *curr;
+	int i, virq, ret;
+
+	for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) {
+		curr = chg_irqs + i;
+
+		virq = regmap_irq_get_virq(chip->irq_chip_data, curr->hwirq);
+		if (virq <= 0)
+			return virq;
+
+		ret = devm_request_threaded_irq(dev, virq, NULL, curr->handler,
+						IRQF_ONESHOT, curr->name, chip);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to register IRQ (%s)\n",
+					     curr->name);
+	}
+
+	return 0;
+}
+
+static const struct regulator_ops rt9471_otg_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.set_current_limit = regulator_set_current_limit_regmap,
+	.get_current_limit = regulator_get_current_limit_regmap,
+};
+
+static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, };
+
+static const struct regulator_desc rt9471_otg_rdesc = {
+	.of_match = of_match_ptr("usb-otg-vbus-regulator"),
+	.name = "rt9471-otg-vbus",
+	.owner = THIS_MODULE,
+	.type = REGULATOR_VOLTAGE,
+	.ops = &rt9471_otg_ops,
+	.min_uV = RT9471_OTGCV_MINUV,
+	.uV_step = RT9471_OTGCV_STEPUV,
+	.n_voltages = RT9471_NUM_VOTG,
+	.curr_table = rt9471_otg_microamp,
+	.n_current_limits = ARRAY_SIZE(rt9471_otg_microamp),
+	.enable_mask = RT9471_OTGEN_MASK,
+	.enable_reg = RT9471_REG_FUNC,
+	.vsel_reg = RT9471_REG_OTGCFG,
+	.vsel_mask = RT9471_OTGCV_MASK,
+	.csel_reg = RT9471_REG_OTGCFG,
+	.csel_mask = RT9471_OTGCC_MASK,
+};
+
+static int rt9471_register_otg_regulator(struct rt9471_chip *chip)
+{
+	struct device *dev = chip->dev;
+	struct regulator_config cfg = { .dev = dev, .driver_data = chip };
+
+	chip->otg_rdev = devm_regulator_register(dev, &rt9471_otg_rdesc, &cfg);
+
+	return PTR_ERR_OR_ZERO(chip->otg_rdev);
+}
+
+static inline struct rt9471_chip *psy_device_to_chip(struct device *dev)
+{
+	return power_supply_get_drvdata(to_power_supply(dev));
+}
+
+static ssize_t sysoff_enable_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct rt9471_chip *chip = psy_device_to_chip(dev);
+	unsigned int sysoff_enable;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_BATFET_DIS], &sysoff_enable);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%d\n", sysoff_enable);
+}
+
+static ssize_t sysoff_enable_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct rt9471_chip *chip = psy_device_to_chip(dev);
+	unsigned int tmp;
+	int ret;
+
+	ret = kstrtouint(buf, 10, &tmp);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(chip->rm_fields[F_BATFET_DIS], !!tmp);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static ssize_t port_detect_enable_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct rt9471_chip *chip = psy_device_to_chip(dev);
+	unsigned int bc12_enable;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_BC12_EN], &bc12_enable);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%d\n", bc12_enable);
+}
+
+static ssize_t port_detect_enable_store(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	struct rt9471_chip *chip = psy_device_to_chip(dev);
+	unsigned int tmp;
+	int ret;
+
+	ret = kstrtouint(buf, 10, &tmp);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(chip->rm_fields[F_BC12_EN], !!tmp);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(sysoff_enable);
+static DEVICE_ATTR_RW(port_detect_enable);
+
+static struct attribute *rt9471_sysfs_attrs[] = {
+	&dev_attr_sysoff_enable.attr,
+	&dev_attr_port_detect_enable.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(rt9471_sysfs);
+
+static int rt9471_register_psy(struct rt9471_chip *chip)
+{
+	struct device *dev = chip->dev;
+	struct power_supply_desc *desc = &chip->psy_desc;
+	struct power_supply_config cfg = {};
+	char *psy_name;
+
+	cfg.drv_data = chip;
+	cfg.of_node = dev->of_node;
+	cfg.attr_grp = rt9471_sysfs_groups;
+
+	psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9471-%s", dev_name(dev));
+	if (!psy_name)
+		return -ENOMEM;
+
+	desc->name = psy_name;
+	desc->type = POWER_SUPPLY_TYPE_USB;
+	desc->usb_types = rt9471_charger_usb_types;
+	desc->num_usb_types = ARRAY_SIZE(rt9471_charger_usb_types);
+	desc->properties = rt9471_charger_properties;
+	desc->num_properties = ARRAY_SIZE(rt9471_charger_properties);
+	desc->get_property = rt9471_charger_get_property;
+	desc->set_property = rt9471_charger_set_property;
+	desc->property_is_writeable = rt9471_charger_property_is_writeable;
+
+	chip->psy = devm_power_supply_register(dev, desc, &cfg);
+
+	return PTR_ERR_OR_ZERO(chip->psy);
+}
+
+static const struct regmap_irq rt9471_regmap_irqs[] = {
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8),
+	REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8),
+};
+
+static const struct regmap_irq_chip rt9471_irq_chip = {
+	.name = "rt9471-irqs",
+	.status_base = RT9471_REG_IRQ0,
+	.mask_base = RT9471_REG_MASK0,
+	.num_regs = RT9471_NUM_IRQ_REGS,
+	.irqs = rt9471_regmap_irqs,
+	.num_irqs = ARRAY_SIZE(rt9471_regmap_irqs),
+};
+
+static const struct reg_sequence rt9471_init_regs[] = {
+	REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */
+	REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */
+	REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */
+	REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */
+	REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */
+	REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */
+	REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */
+};
+
+static int rt9471_check_devinfo(struct rt9471_chip *chip)
+{
+	struct device *dev = chip->dev;
+	unsigned int dev_id;
+	int ret;
+
+	ret = regmap_field_read(chip->rm_fields[F_DEVICE_ID], &dev_id);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to read device_id\n");
+
+	switch (dev_id) {
+	case RT9470_DEVID:
+	case RT9470D_DEVID:
+	case RT9471_DEVID:
+	case RT9471D_DEVID:
+		return 0;
+	default:
+		return dev_err_probe(dev, -ENODEV, "Incorrect device id\n");
+	}
+}
+
+static bool rt9471_accessible_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x0F:
+	case 0x10 ... 0x13:
+	case 0x20 ... 0x33:
+	case 0x40 ... 0xA1:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rt9471_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xA1,
+	.writeable_reg = rt9471_accessible_reg,
+	.readable_reg = rt9471_accessible_reg,
+};
+
+static int rt9471_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct rt9471_chip *chip;
+	struct gpio_desc *ce_gpio;
+	struct regmap *regmap;
+	int ret;
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->dev = dev;
+	mutex_init(&chip->var_lock);
+	i2c_set_clientdata(i2c, chip);
+
+	/* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
+	ce_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(ce_gpio))
+		return dev_err_probe(dev, PTR_ERR(ce_gpio),
+				     "Failed to config charge enable gpio\n");
+
+	regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+	chip->regmap = regmap;
+
+	ret = devm_regmap_field_bulk_alloc(dev, regmap, chip->rm_fields,
+					   rt9471_reg_fields,
+					   ARRAY_SIZE(rt9471_reg_fields));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to alloc regmap field\n");
+
+	ret = rt9471_check_devinfo(chip);
+	if (ret)
+		return ret;
+
+	ret = regmap_register_patch(regmap, rt9471_init_regs,
+				    ARRAY_SIZE(rt9471_init_regs));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init registers\n");
+
+	ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
+				       IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
+				       &rt9471_irq_chip, &chip->irq_chip_data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
+
+	ret = rt9471_register_psy(chip);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register psy\n");
+
+	ret = rt9471_register_otg_regulator(chip);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register otg\n");
+
+	ret = rt9471_register_interrupts(chip);
+	if (ret)
+		return ret;
+
+	/* After IRQs are all initialized, enable port detection by default */
+	return regmap_field_write(chip->rm_fields[F_BC12_EN], 1);
+}
+
+static void rt9471_shutdown(struct i2c_client *i2c)
+{
+	struct rt9471_chip *chip = i2c_get_clientdata(i2c);
+
+	/*
+	 * There's no external reset pin. Do register reset to guarantee charger
+	 * function is normal after shutdown
+	 */
+	regmap_field_write(chip->rm_fields[F_REG_RST], 1);
+}
+
+static const struct of_device_id rt9471_of_device_id[] = {
+	{ .compatible = "richtek,rt9471" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rt9471_of_device_id);
+
+static struct i2c_driver rt9471_driver = {
+	.driver = {
+		.name = "rt9471",
+		.of_match_table = rt9471_of_device_id,
+	},
+	.probe_new = rt9471_probe,
+	.shutdown = rt9471_shutdown,
+};
+module_i2c_driver(rt9471_driver);
+
+MODULE_DESCRIPTION("Richtek RT9471 charger driver");
+MODULE_AUTHOR("Alina Yu <[e-mail]>");
+MODULE_AUTHOR("ChiYuan Huang <[e-mail]>");
+MODULE_LICENSE("GPL");

drivers/power/supply/test_power.c

···
 	char buf[MAX_KEYLENGTH];
 	int cr;
 
-	strncpy(buf, key, MAX_KEYLENGTH);
-	buf[MAX_KEYLENGTH-1] = '\0';
+	strscpy(buf, key, MAX_KEYLENGTH);
 
 	cr = strnlen(buf, MAX_KEYLENGTH) - 1;
 	if (cr < 0)

drivers/power/supply/twl4030_charger.c

···
 
 	for (i = 0; i < ARRAY_SIZE(modes); i++)
 		if (mode == i)
-			len += scnprintf(buf+len, PAGE_SIZE-len,
-					"[%s] ", modes[i]);
+			len += sysfs_emit_at(buf, len, "[%s] ", modes[i]);
 		else
-			len += scnprintf(buf+len, PAGE_SIZE-len,
-					"%s ", modes[i]);
+			len += sysfs_emit_at(buf, len, "%s ", modes[i]);
 	buf[len-1] = '\n';
 	return len;
 }

drivers/power/supply/wm8350_power.c

···
 		return 0;
 	}
 
-	return sprintf(buf, "%s\n", charge);
+	return sysfs_emit(buf, "%s\n", charge);
 }
 
 static DEVICE_ATTR_RO(charger_state);