| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2022 Richtek Technology Corp. |
| * |
| * Authors: Alina Yu <alina_yu@richtek.com> |
| * ChiYuan Huang <cy_huang@richtek.com> |
| */ |
| |
| #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 <alina_yu@richtek.com>"); |
| MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); |
| MODULE_LICENSE("GPL"); |