| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| ChiYuan Huang | 4284 | 100.00% | 1 | 100.00% |
| Total | 4284 | 1 |
// 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");
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