Merge tag 'ib-mt6360-for-5.15-signed' into psy-next

Immutable branch between regulator and power-supply for for 5.15

This immutable branch introduces the MT6360 charger driver,
which requires a new linear range helper.

Signed-off-by: Sebastian Reichel <[e-mail]>

Documentation/devicetree/bindings/power/supply/mt6360_charger.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/mt6360_charger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Battery charger driver for MT6360 PMIC from MediaTek Integrated.
+
+maintainers:
+  - Gene Chen <[e-mail]>
+
+description: |
+  This module is part of the MT6360 MFD device.
+  Provides Battery Charger, Boost for OTG devices and BC1.2 detection.
+
+properties:
+  compatible:
+    const: mediatek,mt6360-chg
+
+  richtek,vinovp-microvolt:
+    description: Maximum CHGIN regulation voltage in uV.
+    enum: [ 5500000, 6500000, 11000000, 14500000 ]
+
+
+  usb-otg-vbus-regulator:
+    type: object
+    description: OTG boost regulator.
+    $ref: /schemas/regulator/regulator.yaml#
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    mt6360_charger: charger {
+      compatible = "mediatek,mt6360-chg";
+      richtek,vinovp-microvolt = <14500000>;
+
+      otg_vbus_regulator: usb-otg-vbus-regulator {
+        regulator-compatible = "usb-otg-vbus";
+        regulator-name = "usb-otg-vbus";
+        regulator-min-microvolt = <4425000>;
+        regulator-max-microvolt = <5825000>;
+      };
+    };
+...

drivers/power/supply/Kconfig

···
 	  Battery charger. This driver provides Battery charger power management
 	  functions on the systems.
 
+config CHARGER_MT6360
+	tristate "Mediatek MT6360 Charger Driver"
+	depends on MFD_MT6360
+	depends on REGULATOR
+	select LINEAR_RANGES
+	help
+	  Say Y here to enable MT6360 Charger Part.
+	  The device supports High-Accuracy Voltage/Current Regulation,
+	  Average Input Current Regulation, Battery Temperature Sensing,
+	  Over-Temperature Protection, DPDM Detection for BC1.2.
+
 config CHARGER_QCOM_SMBB
 	tristate "Qualcomm Switch-Mode Battery Charger and Boost"
 	depends on MFD_SPMI_PMIC || COMPILE_TEST

drivers/power/supply/Makefile

···
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_MP2629)	+= mp2629_charger.o
+obj-$(CONFIG_CHARGER_MT6360)	+= mt6360_charger.o
 obj-$(CONFIG_CHARGER_QCOM_SMBB)	+= qcom_smbb.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o
 obj-$(CONFIG_CHARGER_BQ24190)	+= bq24190_charger.o

drivers/power/supply/mt6360_charger.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ */
+
+#include <linux/devm-helpers.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/linear_range.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+
+#define MT6360_PMU_CHG_CTRL1	0x311
+#define MT6360_PMU_CHG_CTRL2	0x312
+#define MT6360_PMU_CHG_CTRL3	0x313
+#define MT6360_PMU_CHG_CTRL4	0x314
+#define MT6360_PMU_CHG_CTRL5	0x315
+#define MT6360_PMU_CHG_CTRL6	0x316
+#define MT6360_PMU_CHG_CTRL7	0x317
+#define MT6360_PMU_CHG_CTRL8	0x318
+#define MT6360_PMU_CHG_CTRL9	0x319
+#define MT6360_PMU_CHG_CTRL10	0x31A
+#define MT6360_PMU_DEVICE_TYPE	0x322
+#define MT6360_PMU_USB_STATUS1	0x327
+#define MT6360_PMU_CHG_STAT	0x34A
+#define MT6360_PMU_CHG_CTRL19	0x361
+#define MT6360_PMU_FOD_STAT	0x3E7
+
+/* MT6360_PMU_CHG_CTRL1 */
+#define MT6360_FSLP_SHFT	(3)
+#define MT6360_FSLP_MASK	BIT(MT6360_FSLP_SHFT)
+#define MT6360_OPA_MODE_SHFT	(0)
+#define MT6360_OPA_MODE_MASK	BIT(MT6360_OPA_MODE_SHFT)
+/* MT6360_PMU_CHG_CTRL2 */
+#define MT6360_IINLMTSEL_SHFT	(2)
+#define MT6360_IINLMTSEL_MASK	GENMASK(3, 2)
+/* MT6360_PMU_CHG_CTRL3 */
+#define MT6360_IAICR_SHFT	(2)
+#define MT6360_IAICR_MASK	GENMASK(7, 2)
+#define MT6360_ILIM_EN_MASK	BIT(0)
+/* MT6360_PMU_CHG_CTRL4 */
+#define MT6360_VOREG_SHFT	(1)
+#define MT6360_VOREG_MASK	GENMASK(7, 1)
+/* MT6360_PMU_CHG_CTRL5 */
+#define MT6360_VOBST_MASK	GENMASK(7, 2)
+/* MT6360_PMU_CHG_CTRL6 */
+#define MT6360_VMIVR_SHFT      (1)
+#define MT6360_VMIVR_MASK      GENMASK(7, 1)
+/* MT6360_PMU_CHG_CTRL7 */
+#define MT6360_ICHG_SHFT	(2)
+#define MT6360_ICHG_MASK	GENMASK(7, 2)
+/* MT6360_PMU_CHG_CTRL8 */
+#define MT6360_IPREC_SHFT	(0)
+#define MT6360_IPREC_MASK	GENMASK(3, 0)
+/* MT6360_PMU_CHG_CTRL9 */
+#define MT6360_IEOC_SHFT	(4)
+#define MT6360_IEOC_MASK	GENMASK(7, 4)
+/* MT6360_PMU_CHG_CTRL10 */
+#define MT6360_OTG_OC_MASK	GENMASK(3, 0)
+/* MT6360_PMU_DEVICE_TYPE */
+#define MT6360_USBCHGEN_MASK	BIT(7)
+/* MT6360_PMU_USB_STATUS1 */
+#define MT6360_USB_STATUS_SHFT	(4)
+#define MT6360_USB_STATUS_MASK	GENMASK(6, 4)
+/* MT6360_PMU_CHG_STAT */
+#define MT6360_CHG_STAT_SHFT	(6)
+#define MT6360_CHG_STAT_MASK	GENMASK(7, 6)
+#define MT6360_VBAT_LVL_MASK	BIT(5)
+/* MT6360_PMU_CHG_CTRL19 */
+#define MT6360_VINOVP_SHFT	(5)
+#define MT6360_VINOVP_MASK	GENMASK(6, 5)
+/* MT6360_PMU_FOD_STAT */
+#define MT6360_CHRDET_EXT_MASK	BIT(4)
+
+/* uV */
+#define MT6360_VMIVR_MIN	3900000
+#define MT6360_VMIVR_MAX	13400000
+#define MT6360_VMIVR_STEP	100000
+/* uA */
+#define MT6360_ICHG_MIN		100000
+#define MT6360_ICHG_MAX		5000000
+#define MT6360_ICHG_STEP	100000
+/* uV */
+#define MT6360_VOREG_MIN	3900000
+#define MT6360_VOREG_MAX	4710000
+#define MT6360_VOREG_STEP	10000
+/* uA */
+#define MT6360_AICR_MIN		100000
+#define MT6360_AICR_MAX		3250000
+#define MT6360_AICR_STEP	50000
+/* uA */
+#define MT6360_IPREC_MIN	100000
+#define MT6360_IPREC_MAX	850000
+#define MT6360_IPREC_STEP	50000
+/* uA */
+#define MT6360_IEOC_MIN		100000
+#define MT6360_IEOC_MAX		850000
+#define MT6360_IEOC_STEP	50000
+
+enum {
+	MT6360_RANGE_VMIVR,
+	MT6360_RANGE_ICHG,
+	MT6360_RANGE_VOREG,
+	MT6360_RANGE_AICR,
+	MT6360_RANGE_IPREC,
+	MT6360_RANGE_IEOC,
+	MT6360_RANGE_MAX,
+};
+
+#define MT6360_LINEAR_RANGE(idx, _min, _min_sel, _max_sel, _step) \
+	[idx] = REGULATOR_LINEAR_RANGE(_min, _min_sel, _max_sel, _step)
+
+static const struct linear_range mt6360_chg_range[MT6360_RANGE_MAX] = {
+	MT6360_LINEAR_RANGE(MT6360_RANGE_VMIVR, 3900000, 0, 0x5F, 100000),
+	MT6360_LINEAR_RANGE(MT6360_RANGE_ICHG, 100000, 0, 0x31, 100000),
+	MT6360_LINEAR_RANGE(MT6360_RANGE_VOREG, 3900000, 0, 0x51, 10000),
+	MT6360_LINEAR_RANGE(MT6360_RANGE_AICR, 100000, 0, 0x3F, 50000),
+	MT6360_LINEAR_RANGE(MT6360_RANGE_IPREC, 100000, 0, 0x0F, 50000),
+	MT6360_LINEAR_RANGE(MT6360_RANGE_IEOC, 100000, 0, 0x0F, 50000),
+};
+
+struct mt6360_chg_info {
+	struct device *dev;
+	struct regmap *regmap;
+	struct power_supply_desc psy_desc;
+	struct power_supply *psy;
+	struct regulator_dev *otg_rdev;
+	struct mutex chgdet_lock;
+	u32 vinovp;
+	bool pwr_rdy;
+	bool bc12_en;
+	int psy_usb_type;
+	struct work_struct chrdet_work;
+};
+
+enum mt6360_iinlmtsel {
+	MT6360_IINLMTSEL_AICR_3250 = 0,
+	MT6360_IINLMTSEL_CHG_TYPE,
+	MT6360_IINLMTSEL_AICR,
+	MT6360_IINLMTSEL_LOWER_LEVEL,
+};
+
+enum mt6360_pmu_chg_type {
+	MT6360_CHG_TYPE_NOVBUS = 0,
+	MT6360_CHG_TYPE_UNDER_GOING,
+	MT6360_CHG_TYPE_SDP,
+	MT6360_CHG_TYPE_SDPNSTD,
+	MT6360_CHG_TYPE_DCP,
+	MT6360_CHG_TYPE_CDP,
+	MT6360_CHG_TYPE_DISABLE_BC12,
+	MT6360_CHG_TYPE_MAX,
+};
+
+static enum power_supply_usb_type mt6360_charger_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+};
+
+static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
+					     bool *pwr_rdy)
+{
+	int ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, &regval);
+	if (ret < 0)
+		return ret;
+	*pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
+	return 0;
+}
+
+static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
+				     union power_supply_propval *val)
+{
+	int ret;
+	bool pwr_rdy;
+
+	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
+	if (ret < 0)
+		return ret;
+	val->intval = pwr_rdy ? true : false;
+	return 0;
+}
+
+static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
+				     union power_supply_propval *val)
+{
+	int status, ret;
+	unsigned int regval;
+	bool pwr_rdy;
+
+	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
+	if (ret < 0)
+		return ret;
+	if (!pwr_rdy) {
+		status = POWER_SUPPLY_STATUS_DISCHARGING;
+		goto out;
+	}
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
+	if (ret < 0)
+		return ret;
+	regval &= MT6360_CHG_STAT_MASK;
+	regval >>= MT6360_CHG_STAT_SHFT;
+	switch (regval) {
+	case 0x0:
+		status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+	case 0x1:
+		status = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	case 0x2:
+		status = POWER_SUPPLY_STATUS_FULL;
+		break;
+	default:
+		ret = -EIO;
+	}
+out:
+	if (!ret)
+		val->intval = status;
+	return ret;
+}
+
+static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
+					  union power_supply_propval *val)
+{
+	int type, ret;
+	unsigned int regval;
+	u8 chg_stat;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
+	if (ret < 0)
+		return ret;
+
+	chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
+	switch (chg_stat) {
+	case 0x01: /* Charge in Progress */
+		if (regval & MT6360_VBAT_LVL_MASK)
+			type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		else
+			type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		break;
+	case 0x00: /* Not Charging */
+	case 0x02: /* Charge Done */
+	case 0x03: /* Charge Fault */
+	default:
+		type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	}
+
+	val->intval = type;
+	return 0;
+}
+
+static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ret;
+	u32 sel, value;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &sel);
+	if (ret < 0)
+		return ret;
+	sel = (sel & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
+	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_ICHG], sel, &value);
+	if (!ret)
+		val->intval = value;
+	return ret;
+}
+
+static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
+				       union power_supply_propval *val)
+{
+	val->intval = MT6360_ICHG_MAX;
+	return 0;
+}
+
+static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
+				 union power_supply_propval *val)
+{
+	int ret;
+	u32 sel, value;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &sel);
+	if (ret < 0)
+		return ret;
+	sel = (sel & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
+	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VOREG], sel, &value);
+	if (!ret)
+		val->intval = value;
+	return ret;
+}
+
+static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
+				     union power_supply_propval *val)
+{
+	val->intval = MT6360_VOREG_MAX;
+	return 0;
+}
+
+static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ret;
+	u32 sel, value;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &sel);
+	if (ret < 0)
+		return ret;
+	sel = (sel & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
+	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_AICR], sel, &value);
+	if (!ret)
+		val->intval = value;
+	return ret;
+}
+
+static int mt6360_charger_get_mivr(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ret;
+	u32 sel, value;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL6, &sel);
+	if (ret < 0)
+		return ret;
+	sel = (sel & MT6360_VMIVR_MASK) >> MT6360_VMIVR_SHFT;
+	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VMIVR], sel, &value);
+	if (!ret)
+		val->intval = value;
+	return ret;
+}
+
+static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
+				      union power_supply_propval *val)
+{
+	int ret;
+	u32 sel, value;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &sel);
+	if (ret < 0)
+		return ret;
+	sel = (sel & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
+	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IPREC], sel, &value);
+	if (!ret)
+		val->intval = value;
+	return ret;
+}
+
+static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ret;
+	u32 sel, value;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &sel);
+	if (ret < 0)
+		return ret;
+	sel = (sel & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
+	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IEOC], sel, &value);
+	if (!ret)
+		val->intval = value;
+	return ret;
+}
+
+static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
+				     const union power_supply_propval *val)
+{
+	u8 force_sleep = val->intval ? 0 : 1;
+
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL1,
+				  MT6360_FSLP_MASK,
+				  force_sleep << MT6360_FSLP_SHFT);
+}
+
+static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	u32 sel;
+
+	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_ICHG], val->intval, &sel);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL7,
+				  MT6360_ICHG_MASK,
+				  sel << MT6360_ICHG_SHFT);
+}
+
+static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
+				 const union power_supply_propval *val)
+{
+	u32 sel;
+
+	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VOREG], val->intval, &sel);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL4,
+				  MT6360_VOREG_MASK,
+				  sel << MT6360_VOREG_SHFT);
+}
+
+static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	u32 sel;
+
+	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_AICR], val->intval, &sel);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL3,
+				  MT6360_IAICR_MASK,
+				  sel << MT6360_IAICR_SHFT);
+}
+
+static int mt6360_charger_set_mivr(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	u32 sel;
+
+	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VMIVR], val->intval, &sel);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL3,
+				  MT6360_VMIVR_MASK,
+				  sel << MT6360_VMIVR_SHFT);
+}
+
+static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
+				      const union power_supply_propval *val)
+{
+	u32 sel;
+
+	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IPREC], val->intval, &sel);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL8,
+				  MT6360_IPREC_MASK,
+				  sel << MT6360_IPREC_SHFT);
+}
+
+static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	u32 sel;
+
+	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IEOC], val->intval, &sel);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL9,
+				  MT6360_IEOC_MASK,
+				  sel << MT6360_IEOC_SHFT);
+}
+
+static int mt6360_charger_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = mt6360_charger_get_online(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = mt6360_charger_get_status(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		ret = mt6360_charger_get_charge_type(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = mt6360_charger_get_ichg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		ret = mt6360_charger_get_max_ichg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = mt6360_charger_get_cv(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		ret = mt6360_charger_get_max_cv(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = mt6360_charger_get_aicr(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		ret = mt6360_charger_get_mivr(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		ret = mt6360_charger_get_iprechg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		ret = mt6360_charger_get_ieoc(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		val->intval = mci->psy_usb_type;
+		break;
+	default:
+		ret = -ENODATA;
+	}
+	return ret;
+}
+
+static int mt6360_charger_set_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       const union power_supply_propval *val)
+{
+	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
+	int ret;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = mt6360_charger_set_online(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = mt6360_charger_set_ichg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = mt6360_charger_set_cv(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = mt6360_charger_set_aicr(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		ret = mt6360_charger_set_mivr(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		ret = mt6360_charger_set_iprechg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		ret = mt6360_charger_set_ieoc(mci, val);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+static int mt6360_charger_property_is_writeable(struct power_supply *psy,
+					       enum power_supply_property psp)
+{
+	switch (psp) {
+	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 enum power_supply_property mt6360_charger_properties[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	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_PRECHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+	POWER_SUPPLY_PROP_USB_TYPE,
+};
+
+static const struct power_supply_desc mt6360_charger_desc = {
+	.type			= POWER_SUPPLY_TYPE_USB,
+	.properties		= mt6360_charger_properties,
+	.num_properties		= ARRAY_SIZE(mt6360_charger_properties),
+	.get_property		= mt6360_charger_get_property,
+	.set_property		= mt6360_charger_set_property,
+	.property_is_writeable	= mt6360_charger_property_is_writeable,
+	.usb_types		= mt6360_charger_usb_types,
+	.num_usb_types		= ARRAY_SIZE(mt6360_charger_usb_types),
+};
+
+static const struct regulator_ops mt6360_chg_otg_ops = {
+	.list_voltage = regulator_list_voltage_linear,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static const struct regulator_desc mt6360_otg_rdesc = {
+	.of_match = "usb-otg-vbus",
+	.name = "usb-otg-vbus",
+	.ops = &mt6360_chg_otg_ops,
+	.owner = THIS_MODULE,
+	.type = REGULATOR_VOLTAGE,
+	.min_uV = 4425000,
+	.uV_step = 25000,
+	.n_voltages = 57,
+	.vsel_reg = MT6360_PMU_CHG_CTRL5,
+	.vsel_mask = MT6360_VOBST_MASK,
+	.enable_reg = MT6360_PMU_CHG_CTRL1,
+	.enable_mask = MT6360_OPA_MODE_MASK,
+};
+
+static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
+{
+	struct mt6360_chg_info *mci = data;
+	int ret;
+	unsigned int usb_status;
+	int last_usb_type;
+
+	mutex_lock(&mci->chgdet_lock);
+	if (!mci->bc12_en) {
+		dev_warn(mci->dev, "Received attach interrupt, bc12 disabled, ignore irq\n");
+		goto out;
+	}
+	last_usb_type = mci->psy_usb_type;
+	/* Plug in */
+	ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
+	if (ret < 0)
+		goto out;
+	usb_status &= MT6360_USB_STATUS_MASK;
+	usb_status >>= MT6360_USB_STATUS_SHFT;
+	switch (usb_status) {
+	case MT6360_CHG_TYPE_NOVBUS:
+		dev_dbg(mci->dev, "Received attach interrupt, no vbus\n");
+		goto out;
+	case MT6360_CHG_TYPE_UNDER_GOING:
+		dev_dbg(mci->dev, "Received attach interrupt, under going...\n");
+		goto out;
+	case MT6360_CHG_TYPE_SDP:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case MT6360_CHG_TYPE_SDPNSTD:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case MT6360_CHG_TYPE_CDP:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	case MT6360_CHG_TYPE_DCP:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case MT6360_CHG_TYPE_DISABLE_BC12:
+		dev_dbg(mci->dev, "Received attach interrupt, bc12 detect not enable\n");
+		goto out;
+	default:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		dev_dbg(mci->dev, "Received attach interrupt, reserved address\n");
+		goto out;
+	}
+
+	dev_dbg(mci->dev, "Received attach interrupt, chg_type = %d\n", mci->psy_usb_type);
+	if (last_usb_type != mci->psy_usb_type)
+		power_supply_changed(mci->psy);
+out:
+	mutex_unlock(&mci->chgdet_lock);
+	return IRQ_HANDLED;
+}
+
+static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
+{
+	int ret;
+	bool pwr_rdy;
+
+	mutex_lock(&mci->chgdet_lock);
+	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
+	if (ret < 0)
+		goto out;
+	if (mci->pwr_rdy == pwr_rdy) {
+		dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy is same(%d)\n", pwr_rdy);
+		goto out;
+	}
+	mci->pwr_rdy = pwr_rdy;
+	dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy = %d\n", pwr_rdy);
+	if (!pwr_rdy) {
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		power_supply_changed(mci->psy);
+
+	}
+	ret = regmap_update_bits(mci->regmap,
+				 MT6360_PMU_DEVICE_TYPE,
+				 MT6360_USBCHGEN_MASK,
+				 pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
+	if (ret < 0)
+		goto out;
+	mci->bc12_en = pwr_rdy;
+out:
+	mutex_unlock(&mci->chgdet_lock);
+}
+
+static void mt6360_chrdet_work(struct work_struct *work)
+{
+	struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
+				     work, struct mt6360_chg_info, chrdet_work);
+
+	mt6360_handle_chrdet_ext_evt(mci);
+}
+
+static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
+{
+	struct mt6360_chg_info *mci = data;
+
+	mt6360_handle_chrdet_ext_evt(mci);
+	return IRQ_HANDLED;
+}
+
+static int mt6360_chg_irq_register(struct platform_device *pdev)
+{
+	const struct {
+		const char *name;
+		irq_handler_t handler;
+	} irq_descs[] = {
+		{ "attach_i", mt6360_pmu_attach_i_handler },
+		{ "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
+	};
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
+		ret = platform_get_irq_byname(pdev, irq_descs[i].name);
+		if (ret < 0)
+			return ret;
+
+		ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
+						irq_descs[i].handler,
+						IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+						irq_descs[i].name,
+						platform_get_drvdata(pdev));
+		if (ret < 0)
+			return dev_err_probe(&pdev->dev, ret, "Failed to request %s irq\n",
+					     irq_descs[i].name);
+	}
+
+	return 0;
+}
+
+static u32 mt6360_vinovp_trans_to_sel(u32 val)
+{
+	u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
+	int i;
+
+	/* Select the smaller and equal supported value */
+	for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
+		if (val < vinovp_tbl[i+1])
+			break;
+	}
+	return i;
+}
+
+static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
+{
+	int ret;
+	u32 sel;
+
+	sel = mt6360_vinovp_trans_to_sel(mci->vinovp);
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
+				  MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
+	if (ret)
+		return dev_err_probe(mci->dev, ret, "%s: Failed to apply vinovp\n", __func__);
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
+				 MT6360_USBCHGEN_MASK, 0);
+	if (ret)
+		return dev_err_probe(mci->dev, ret, "%s: Failed to disable bc12\n", __func__);
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
+				 MT6360_IINLMTSEL_MASK,
+				 MT6360_IINLMTSEL_AICR <<
+					MT6360_IINLMTSEL_SHFT);
+	if (ret)
+		return dev_err_probe(mci->dev, ret,
+				     "%s: Failed to switch iinlmtsel to aicr\n", __func__);
+	usleep_range(5000, 6000);
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
+				 MT6360_ILIM_EN_MASK, 0);
+	if (ret)
+		return dev_err_probe(mci->dev, ret,
+				     "%s: Failed to disable ilim\n", __func__);
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL10,
+				 MT6360_OTG_OC_MASK, MT6360_OTG_OC_MASK);
+	if (ret)
+		return dev_err_probe(mci->dev, ret,
+				     "%s: Failed to config otg oc to 3A\n", __func__);
+	return 0;
+}
+
+static int mt6360_charger_probe(struct platform_device *pdev)
+{
+	struct mt6360_chg_info *mci;
+	struct power_supply_config charger_cfg = {};
+	struct regulator_config config = { };
+	int ret;
+
+	mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
+	if (!mci)
+		return -ENOMEM;
+
+	mci->dev = &pdev->dev;
+	mci->vinovp = 6500000;
+	mutex_init(&mci->chgdet_lock);
+	platform_set_drvdata(pdev, mci);
+	devm_work_autocancel(&pdev->dev, &mci->chrdet_work, mt6360_chrdet_work);
+
+	ret = device_property_read_u32(&pdev->dev, "richtek,vinovp-microvolt", &mci->vinovp);
+	if (ret)
+		dev_warn(&pdev->dev, "Failed to parse vinovp in DT, keep default 6.5v\n");
+
+	mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!mci->regmap)
+		return dev_err_probe(&pdev->dev, -ENODEV, "Failed to get parent regmap\n");
+
+	ret = mt6360_chg_init_setting(mci);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "Failed to initial setting\n");
+
+	memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
+	mci->psy_desc.name = dev_name(&pdev->dev);
+	charger_cfg.drv_data = mci;
+	charger_cfg.of_node = pdev->dev.of_node;
+	mci->psy = devm_power_supply_register(&pdev->dev,
+					      &mci->psy_desc, &charger_cfg);
+	if (IS_ERR(mci->psy))
+		return dev_err_probe(&pdev->dev, PTR_ERR(mci->psy),
+				     "Failed to register power supply dev\n");
+
+
+	ret = mt6360_chg_irq_register(pdev);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "Failed to register irqs\n");
+
+	config.dev = &pdev->dev;
+	config.regmap = mci->regmap;
+	mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
+						&config);
+	if (IS_ERR(mci->otg_rdev))
+		return PTR_ERR(mci->otg_rdev);
+
+	schedule_work(&mci->chrdet_work);
+
+	return 0;
+}
+
+static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
+	{ .compatible = "mediatek,mt6360-chg", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
+
+static const struct platform_device_id mt6360_charger_id[] = {
+	{ "mt6360-chg", 0 },
+	{},
+};
+MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
+
+static struct platform_driver mt6360_charger_driver = {
+	.driver = {
+		.name = "mt6360-chg",
+		.of_match_table = of_match_ptr(mt6360_charger_of_id),
+	},
+	.probe = mt6360_charger_probe,
+	.id_table = mt6360_charger_id,
+};
+module_platform_driver(mt6360_charger_driver);
+
+MODULE_AUTHOR("Gene Chen <[e-mail]>");
+MODULE_DESCRIPTION("MT6360 Charger Driver");
+MODULE_LICENSE("GPL");

include/linux/linear_range.h

···
 int linear_range_get_selector_high(const struct linear_range *r,
 				   unsigned int val, unsigned int *selector,
 				   bool *found);
+void linear_range_get_selector_within(const struct linear_range *r,
+				      unsigned int val, unsigned int *selector);
 int linear_range_get_selector_low_array(const struct linear_range *r,
 					int ranges, unsigned int val,
 					unsigned int *selector, bool *found);

lib/linear_ranges.c

···
 }
 EXPORT_SYMBOL_GPL(linear_range_get_selector_high);
 
+/**
+ * linear_range_get_selector_within - return linear range selector for value
+ * @r:		pointer to linear range where selector is looked from
+ * @val:	value for which the selector is searched
+ * @selector:	address where found selector value is updated
+ *
+ * Return selector for which range value is closest match for given
+ * input value. Value is matching if it is equal or lower than given
+ * value. But return maximum selector if given value is higher than
+ * maximum value.
+ */
+void linear_range_get_selector_within(const struct linear_range *r,
+				      unsigned int val, unsigned int *selector)
+{
+	if (r->min > val) {
+		*selector = r->min_sel;
+		return;
+	}
+
+	if (linear_range_get_max_value(r) < val) {
+		*selector = r->max_sel;
+		return;
+	}
+
+	if (r->step == 0)
+		*selector = r->min_sel;
+	else
+		*selector = (val - r->min) / r->step + r->min_sel;
+}
+EXPORT_SYMBOL_GPL(linear_range_get_selector_within);
+
 MODULE_DESCRIPTION("linear-ranges helper");
 MODULE_LICENSE("GPL");