// SPDX-License-Identifier: GPL-2.0 /* * Chrager driver for Sc89890 * * Copyright (c) 2022 Rockchip Electronics Co., Ltd. * * Author: Xu Shengfei */ #include #include #include #include #include #include #include #include #include /* Module parameters. */ static int debug; module_param_named(debug, debug, int, 0644); MODULE_PARM_DESC(debug, "Set to one to enable debugging messages."); #define DBG(args...) \ do { \ if (debug) { \ pr_info(args); \ } \ } while (0) #define SC89890_MANUFACTURER "SOUTHCHIP" #define SC89890_IRQ "sc89890_irq" #define SC89890_ID 4 #define SC89890_DEBUG_BUF_LEN 30 enum sc89890_fields { F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */ F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */ F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN, F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */ F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN, F_MIN_VBAT_SEL, /* Reg03 */ F_PUMPX_EN, F_ICHG, /* Reg04 */ F_IPRECHG, F_ITERM, /* Reg05 */ F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */ F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR, F_JEITA_ISET, /* Reg07 */ F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */ F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET, F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */ F_BOOSTV, F_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */ F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD, F_VSYS_STAT, /* Reg0B */ F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT, F_NTC_FAULT, /* Reg0C */ F_FORCE_VINDPM, F_VINDPM, /* Reg0D */ F_THERM_STAT, F_BATV, /* Reg0E */ F_SYSV, /* Reg0F */ F_TSPCT, /* Reg10 */ F_VBUS_GD, F_VBUSV, /* Reg11 */ F_ICHGR, /* Reg12 */ F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */ F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */ F_MAX_FIELDS }; /* initial field values, converted to register values */ struct sc89890_init_data { u8 ichg; /* charge current */ u8 vreg; /* regulation voltage */ u8 iterm; /* termination current */ u8 iprechg; /* precharge current */ u8 sysvmin; /* minimum system voltage limit */ u8 boostv; /* boost regulation voltage */ u8 boosti; /* boost current limit */ u8 boostf; /* boost frequency */ u8 ilim_en; /* enable ILIM pin */ u8 treg; /* thermal regulation threshold */ u8 rbatcomp; /* IBAT sense resistor value */ u8 vclamp; /* IBAT compensation voltage limit */ }; struct sc89890_state { u8 online; u8 chrg_status; u8 chrg_fault; u8 vsys_status; u8 boost_fault; u8 bat_fault; }; struct sc89890_device { struct i2c_client *client; struct device *dev; struct power_supply *charger; struct regulator_dev *otg_vbus_reg; unsigned long usb_event; struct gpio_desc *gpiod_otg_en; struct regmap *rmap; struct regmap_field *rmap_fields[F_MAX_FIELDS]; struct sc89890_init_data init_data; struct sc89890_state state; struct mutex lock; /* protect state data */ }; static const struct regmap_range sc89890_readonly_reg_ranges[] = { regmap_reg_range(0x0b, 0x0c), regmap_reg_range(0x0e, 0x13), }; static const struct regmap_access_table sc89890_writeable_regs = { .no_ranges = sc89890_readonly_reg_ranges, .n_no_ranges = ARRAY_SIZE(sc89890_readonly_reg_ranges), }; static const struct regmap_range sc89890_volatile_reg_ranges[] = { regmap_reg_range(0x00, 0x00), regmap_reg_range(0x02, 0x02), regmap_reg_range(0x09, 0x09), regmap_reg_range(0x0b, 0x0b), regmap_reg_range(0x0c, 0x0c), regmap_reg_range(0x0d, 0x14), }; static const struct regmap_access_table sc89890_volatile_regs = { .yes_ranges = sc89890_volatile_reg_ranges, .n_yes_ranges = ARRAY_SIZE(sc89890_volatile_reg_ranges), }; static const struct regmap_config sc89890_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = 0x14, .cache_type = REGCACHE_RBTREE, .wr_table = &sc89890_writeable_regs, .volatile_table = &sc89890_volatile_regs, }; static const struct reg_field sc89890_reg_fields[] = { /* REG00 */ [F_EN_HIZ] = REG_FIELD(0x00, 7, 7), [F_EN_ILIM] = REG_FIELD(0x00, 6, 6), [F_IILIM] = REG_FIELD(0x00, 0, 5), /* REG01 */ [F_BHOT] = REG_FIELD(0x01, 6, 7), [F_BCOLD] = REG_FIELD(0x01, 5, 5), [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4), /* REG02 */ [F_CONV_START] = REG_FIELD(0x02, 7, 7), [F_CONV_RATE] = REG_FIELD(0x02, 6, 6), [F_BOOSTF] = REG_FIELD(0x02, 5, 5), [F_ICO_EN] = REG_FIELD(0x02, 4, 4), [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1), [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0), /* REG03 */ [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7), [F_WD_RST] = REG_FIELD(0x03, 6, 6), [F_OTG_CFG] = REG_FIELD(0x03, 5, 5), [F_CHG_CFG] = REG_FIELD(0x03, 4, 4), [F_SYSVMIN] = REG_FIELD(0x03, 1, 3), [F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0), /* REG04 */ [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7), [F_ICHG] = REG_FIELD(0x04, 0, 6), /* REG05 */ [F_IPRECHG] = REG_FIELD(0x05, 4, 7), [F_ITERM] = REG_FIELD(0x05, 0, 3), /* REG06 */ [F_VREG] = REG_FIELD(0x06, 2, 7), [F_BATLOWV] = REG_FIELD(0x06, 1, 1), [F_VRECHG] = REG_FIELD(0x06, 0, 0), /* REG07 */ [F_TERM_EN] = REG_FIELD(0x07, 7, 7), [F_STAT_DIS] = REG_FIELD(0x07, 6, 6), [F_WD] = REG_FIELD(0x07, 4, 5), [F_TMR_EN] = REG_FIELD(0x07, 3, 3), [F_CHG_TMR] = REG_FIELD(0x07, 1, 2), [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), /* REG08 */ [F_BATCMP] = REG_FIELD(0x08, 5, 7), [F_VCLAMP] = REG_FIELD(0x08, 2, 4), [F_TREG] = REG_FIELD(0x08, 0, 1), /* REG09 */ [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7), [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6), [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5), [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3), [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2), [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1), [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0), /* REG0A */ [F_BOOSTV] = REG_FIELD(0x0A, 4, 7), [F_BOOSTI] = REG_FIELD(0x0A, 0, 2), [F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), /* REG0B */ [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7), [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4), [F_PG_STAT] = REG_FIELD(0x0B, 2, 2), [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0), /* REG0C */ [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7), [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6), [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5), [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3), [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2), /* REG0D */ [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7), [F_VINDPM] = REG_FIELD(0x0D, 0, 6), /* REG0E */ [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7), [F_BATV] = REG_FIELD(0x0E, 0, 6), /* REG0F */ [F_SYSV] = REG_FIELD(0x0F, 0, 6), /* REG10 */ [F_TSPCT] = REG_FIELD(0x10, 0, 6), /* REG11 */ [F_VBUS_GD] = REG_FIELD(0x11, 7, 7), [F_VBUSV] = REG_FIELD(0x11, 0, 6), /* REG12 */ [F_ICHGR] = REG_FIELD(0x12, 0, 6), /* REG13 */ [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7), [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6), [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5), /* REG14 */ [F_REG_RST] = REG_FIELD(0x14, 7, 7), [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6), [F_PN] = REG_FIELD(0x14, 3, 5), [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2), [F_DEV_REV] = REG_FIELD(0x14, 0, 1) }; enum sc89890_status { STATUS_NOT_CHARGING, STATUS_PRE_CHARGING, STATUS_FAST_CHARGING, STATUS_TERMINATION_DONE, }; enum sc89890_chrg_fault { CHRG_FAULT_NORMAL, CHRG_FAULT_INPUT, CHRG_FAULT_THERMAL_SHUTDOWN, CHRG_FAULT_TIMER_EXPIRED, }; /* * Most of the val -> idx conversions can be computed, given the minimum, * maximum and the step between values. For the rest of conversions, we use * lookup tables. */ enum sc89890_table_ids { /* range tables */ TBL_ICHG, TBL_ITERM, TBL_IILIM, TBL_VREG, TBL_BOOSTV, TBL_VBATCOMP, TBL_RBATCOMP, /* lookup tables */ TBL_TREG, TBL_SYSVMIN, TBL_BOOSTI, }; /* Thermal Regulation Threshold lookup table, in degrees Celsius */ static const u32 sc89890_treg_tbl[] = { 60, 80, 100, 120 }; #define SC89890_TREG_TBL_SIZE ARRAY_SIZE(sc89890_treg_tbl) /* Boost mode current limit lookup table, in uA */ static const u32 sc89890_boosti_tbl[] = { 500000, 750000, 1200000, 1400000, 1650000, 1875000, 2150000, 2450000 }; #define SC89890_BOOSTI_TBL_SIZE ARRAY_SIZE(sc89890_boosti_tbl) /* sys min voltage lookup table, in uV */ static const u32 sc89890_vsys_tbl[] = { 2600000, 2800000, 3000000, 3200000, 3400000, 3500000, 3600000, 3700000 }; #define SC89890_VSYS_TBL_SIZE ARRAY_SIZE(sc89890_vsys_tbl) struct sc89890_range { u32 min; u32 max; u32 step; }; struct sc89890_lookup { const u32 *tbl; u32 size; }; static const union { struct sc89890_range rt; struct sc89890_lookup lt; } sc89890_tables[] = { /* range tables */ [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */ [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */ [TBL_IILIM] = { .rt = {100000, 3250000, 50000} }, /* uA */ [TBL_VREG] = { .rt = {3840000, 4848000, 16000} }, /* uV */ [TBL_BOOSTV] = { .rt = {3900000, 5400000, 100000} }, /* uV */ [TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */ [TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */ /* lookup tables */ [TBL_TREG] = { .lt = {sc89890_treg_tbl, SC89890_TREG_TBL_SIZE} }, [TBL_SYSVMIN] = { .lt = {sc89890_vsys_tbl, SC89890_VSYS_TBL_SIZE} }, /* uV */ [TBL_BOOSTI] = { .lt = {sc89890_boosti_tbl, SC89890_BOOSTI_TBL_SIZE} } }; static int sc89890_field_read(struct sc89890_device *sc89890, enum sc89890_fields field_id) { int ret; int val; ret = regmap_field_read(sc89890->rmap_fields[field_id], &val); if (ret < 0) return ret; return val; } static int sc89890_field_write(struct sc89890_device *sc89890, enum sc89890_fields field_id, u8 val) { return regmap_field_write(sc89890->rmap_fields[field_id], val); } static u8 sc89890_find_idx(u32 value, enum sc89890_table_ids id) { u8 idx; if (id >= TBL_TREG) { const u32 *tbl = sc89890_tables[id].lt.tbl; u32 tbl_size = sc89890_tables[id].lt.size; for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++) ; } else { const struct sc89890_range *rtbl = &sc89890_tables[id].rt; u8 rtbl_size; rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1; for (idx = 1; idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value); idx++) ; } return idx - 1; } static u32 sc89890_find_val(u8 idx, enum sc89890_table_ids id) { const struct sc89890_range *rtbl; /* lookup table? */ if (id >= TBL_TREG) return sc89890_tables[id].lt.tbl[idx]; /* range table */ rtbl = &sc89890_tables[id].rt; return (rtbl->min + idx * rtbl->step); } static bool sc89890_is_adc_property(enum power_supply_property psp) { switch (psp) { case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_CURRENT_NOW: return true; default: return false; } } static int sc89890_get_chip_state(struct sc89890_device *sc89890, struct sc89890_state *state) { int i, ret; struct { enum sc89890_fields id; u8 *data; } state_fields[] = { {F_CHG_STAT, &state->chrg_status}, {F_PG_STAT, &state->online}, {F_VSYS_STAT, &state->vsys_status}, {F_BOOST_FAULT, &state->boost_fault}, {F_BAT_FAULT, &state->bat_fault}, {F_CHG_FAULT, &state->chrg_fault} }; for (i = 0; i < ARRAY_SIZE(state_fields); i++) { ret = sc89890_field_read(sc89890, state_fields[i].id); if (ret < 0) return ret; *state_fields[i].data = ret; } DBG("SC89890: S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n", state->chrg_status, state->online, state->vsys_status, state->chrg_fault, state->boost_fault, state->bat_fault); return 0; } static irqreturn_t __sc89890_handle_irq(struct sc89890_device *sc89890) { struct sc89890_state new_state; int ret; ret = sc89890_get_chip_state(sc89890, &new_state); if (ret < 0) return IRQ_NONE; if (!memcmp(&sc89890->state, &new_state, sizeof(new_state))) return IRQ_NONE; if (!new_state.online && sc89890->state.online) { /* power removed */ /* disable ADC */ ret = sc89890_field_write(sc89890, F_CONV_START, 0); if (ret < 0) goto error; } else if (new_state.online && !sc89890->state.online) { /* power inserted */ /* enable ADC, to have control of charge current/voltage */ ret = sc89890_field_write(sc89890, F_CONV_START, 1); if (ret < 0) goto error; } sc89890->state = new_state; power_supply_changed(sc89890->charger); return IRQ_HANDLED; error: dev_err(sc89890->dev, "Error communicating with the chip: %pe\n", ERR_PTR(ret)); return IRQ_HANDLED; } static int sc89890_power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct sc89890_device *sc89890 = power_supply_get_drvdata(psy); struct sc89890_state state; bool do_adc_conv; int ret; mutex_lock(&sc89890->lock); /* update state in case we lost an interrupt */ __sc89890_handle_irq(sc89890); state = sc89890->state; do_adc_conv = !state.online && sc89890_is_adc_property(psp); if (do_adc_conv) sc89890_field_write(sc89890, F_CONV_START, 1); mutex_unlock(&sc89890->lock); if (do_adc_conv) regmap_field_read_poll_timeout(sc89890->rmap_fields[F_CONV_START], ret, !ret, 25000, 1000000); switch (psp) { case POWER_SUPPLY_PROP_STATUS: if (!state.online) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (state.chrg_status == STATUS_NOT_CHARGING) val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (state.chrg_status == STATUS_PRE_CHARGING || state.chrg_status == STATUS_FAST_CHARGING) val->intval = POWER_SUPPLY_STATUS_CHARGING; else if (state.chrg_status == STATUS_TERMINATION_DONE) val->intval = POWER_SUPPLY_STATUS_FULL; else val->intval = POWER_SUPPLY_STATUS_UNKNOWN; break; case POWER_SUPPLY_PROP_CHARGE_TYPE: if (!state.online || 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) val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD; else if (state.chrg_status == STATUS_FAST_CHARGING) val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; else /* unreachable */ val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; break; case POWER_SUPPLY_PROP_MANUFACTURER: val->strval = SC89890_MANUFACTURER; break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = "SC89890"; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = !!state.chrg_status; break; case POWER_SUPPLY_PROP_HEALTH: if (!state.chrg_fault && !state.bat_fault && !state.boost_fault) val->intval = POWER_SUPPLY_HEALTH_GOOD; else if (state.bat_fault) val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED) val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN) val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; else val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: val->intval = sc89890_find_val(sc89890->init_data.ichg, TBL_ICHG); break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: if (!state.online) { val->intval = 0; break; } ret = sc89890_field_read(sc89890, F_BATV); /* read measured value */ if (ret < 0) return ret; /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ val->intval = 2304000 + ret * 20000; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: val->intval = sc89890_find_val(sc89890->init_data.vreg, TBL_VREG); break; case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: val->intval = sc89890_find_val(sc89890->init_data.iprechg, TBL_ITERM); break; case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: val->intval = sc89890_find_val(sc89890->init_data.iterm, TBL_ITERM); break; case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: ret = sc89890_field_read(sc89890, F_IILIM); if (ret < 0) return ret; val->intval = sc89890_find_val(ret, TBL_IILIM); break; case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: val->intval = 13500000; /* uV */ break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: ret = sc89890_field_read(sc89890, F_SYSV); /* read measured value */ if (ret < 0) return ret; /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ val->intval = 2304000 + ret * 20000; break; case POWER_SUPPLY_PROP_CURRENT_NOW: ret = sc89890_field_read(sc89890, F_ICHGR); /* read measured value */ if (ret < 0) return ret; /* converted_val = ADC_val * 50mA (table 10.3.19) */ val->intval = ret * -50000; break; default: return -EINVAL; } return 0; } static int sc89890_enable_charger(struct sc89890_device *sc89890) { return sc89890_field_write(sc89890, F_CHG_CFG, 1); } static int sc89890_disable_charger(struct sc89890_device *sc89890) { return sc89890_field_write(sc89890, F_CHG_CFG, 0); } static int sc89890_power_supply_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct sc89890_device *sc89890 = power_supply_get_drvdata(psy); int index, ret; switch (psp) { case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: index = sc89890_find_idx(val->intval, TBL_ICHG); ret = sc89890_field_write(sc89890, F_ICHG, index); if (ret < 0) dev_err(sc89890->dev, "set input voltage limit failed\n"); break; case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: index = sc89890_find_idx(val->intval, TBL_IILIM); ret = sc89890_field_write(sc89890, F_IILIM, index); if (ret < 0) dev_err(sc89890->dev, "set input current limit failed\n"); break; case POWER_SUPPLY_PROP_ONLINE: if (val->intval) { ret = sc89890_enable_charger(sc89890); if (ret < 0) dev_err(sc89890->dev, "enable charge failed\n"); } else { ret = sc89890_disable_charger(sc89890); if (ret < 0) dev_err(sc89890->dev, "disable charge failed\n"); } break; default: ret = -EINVAL; } return ret; } static irqreturn_t sc89890_irq_handler_thread(int irq, void *private) { struct sc89890_device *sc89890 = private; irqreturn_t ret; mutex_lock(&sc89890->lock); ret = __sc89890_handle_irq(sc89890); mutex_unlock(&sc89890->lock); return ret; } static int sc89890_chip_reset(struct sc89890_device *sc89890) { int ret; int rst_check_counter = 10; ret = sc89890_field_write(sc89890, F_REG_RST, 1); if (ret < 0) return ret; do { ret = sc89890_field_read(sc89890, F_REG_RST); if (ret < 0) return ret; usleep_range(5, 10); } while (ret == 1 && --rst_check_counter); if (!rst_check_counter) return -ETIMEDOUT; return 0; } static int sc89890_hw_init(struct sc89890_device *sc89890) { int ret; int i; const struct { enum sc89890_fields id; u32 value; } init_data[] = { {F_ICHG, sc89890->init_data.ichg}, {F_VREG, sc89890->init_data.vreg}, {F_ITERM, sc89890->init_data.iterm}, {F_IPRECHG, sc89890->init_data.iprechg}, {F_SYSVMIN, sc89890->init_data.sysvmin}, {F_BOOSTV, sc89890->init_data.boostv}, {F_BOOSTI, sc89890->init_data.boosti}, {F_BOOSTF, sc89890->init_data.boostf}, {F_EN_ILIM, sc89890->init_data.ilim_en}, {F_TREG, sc89890->init_data.treg}, {F_BATCMP, sc89890->init_data.rbatcomp}, {F_VCLAMP, sc89890->init_data.vclamp}, }; ret = sc89890_chip_reset(sc89890); if (ret < 0) { dev_dbg(sc89890->dev, "Reset failed %d\n", ret); return ret; } /* disable watchdog */ ret = sc89890_field_write(sc89890, F_WD, 0); if (ret < 0) { dev_dbg(sc89890->dev, "Disabling watchdog failed %d\n", ret); return ret; } /* initialize currents/voltages and other parameters */ for (i = 0; i < ARRAY_SIZE(init_data); i++) { ret = sc89890_field_write(sc89890, init_data[i].id, init_data[i].value); if (ret < 0) { dev_dbg(sc89890->dev, "Writing init data failed %d\n", ret); return ret; } } /* Configure ADC for continuous conversions when charging */ ret = sc89890_field_write(sc89890, F_CONV_RATE, !!sc89890->state.online); if (ret < 0) { dev_err(sc89890->dev, "Config ADC failed %d\n", ret); return ret; } ret = sc89890_field_write(sc89890, F_AUTO_DPDM_EN, 0); if (ret < 0) { dev_err(sc89890->dev, "Config F_AUTO_DPDM_EN failed %d\n", ret); return ret; } ret = sc89890_field_write(sc89890, F_HVDCP_EN, 0); if (ret < 0) { dev_err(sc89890->dev, "Config F_HVDCP_EN failed %d\n", ret); return ret; } ret = sc89890_get_chip_state(sc89890, &sc89890->state); if (ret < 0) { dev_err(sc89890->dev, "Get state failed %d\n", ret); return ret; } return 0; } static const enum power_supply_property sc89890_power_supply_props[] = { POWER_SUPPLY_PROP_MANUFACTURER, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, POWER_SUPPLY_PROP_PRECHARGE_CURRENT, POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, }; static char *sc89890_charger_supplied_to[] = { "usb", }; static const struct power_supply_desc sc89890_power_supply_desc = { .name = "sc89890-charger", .type = POWER_SUPPLY_TYPE_USB, .properties = sc89890_power_supply_props, .num_properties = ARRAY_SIZE(sc89890_power_supply_props), .set_property = sc89890_power_supply_set_property, .get_property = sc89890_power_supply_get_property, }; static int sc89890_power_supply_init(struct sc89890_device *sc89890) { struct power_supply_config psy_cfg = { .drv_data = sc89890, }; psy_cfg.of_node = sc89890->dev->of_node; psy_cfg.supplied_to = sc89890_charger_supplied_to; psy_cfg.num_supplicants = ARRAY_SIZE(sc89890_charger_supplied_to); sc89890->charger = devm_power_supply_register(sc89890->dev, &sc89890_power_supply_desc, &psy_cfg); if (PTR_ERR_OR_ZERO(sc89890->charger)) { dev_err(sc89890->dev, "failed to register power supply\n"); return PTR_ERR(sc89890->charger); } return 0; } static int sc89890_get_chip_version(struct sc89890_device *sc89890) { int id; id = sc89890_field_read(sc89890, F_PN); if (id < 0) { dev_err(sc89890->dev, "Cannot read chip ID.\n"); return id; } else if (id != SC89890_ID) { dev_err(sc89890->dev, "Unknown chip ID %d\n", id); return -ENODEV; } DBG("charge IC: SC89890\n"); return 0; } static void sc89890_set_otg_vbus(struct sc89890_device *sc, bool enable) { sc89890_field_write(sc, F_OTG_CFG, enable); } static int sc89890_otg_vbus_enable(struct regulator_dev *dev) { struct sc89890_device *sc = rdev_get_drvdata(dev); if (!IS_ERR_OR_NULL(sc->gpiod_otg_en)) gpiod_direction_output(sc->gpiod_otg_en, 0x1); sc89890_disable_charger(sc); sc89890_set_otg_vbus(sc, true); return 0; } static int sc89890_otg_vbus_disable(struct regulator_dev *dev) { struct sc89890_device *sc = rdev_get_drvdata(dev); if (!IS_ERR_OR_NULL(sc->gpiod_otg_en)) gpiod_direction_output(sc->gpiod_otg_en, 0x0); sc89890_set_otg_vbus(sc, false); return 0; } static int sc89890_otg_vbus_is_enabled(struct regulator_dev *dev) { struct sc89890_device *sc = rdev_get_drvdata(dev); u8 val; val = sc89890_field_read(sc, F_OTG_CFG); return val; } static const struct regulator_ops sc89890_otg_vbus_ops = { .enable = sc89890_otg_vbus_enable, .disable = sc89890_otg_vbus_disable, .is_enabled = sc89890_otg_vbus_is_enabled, }; static const struct regulator_desc sc89890_otg_vbus_desc = { .name = "otg-vbus", .of_match = "otg-vbus", .regulators_node = of_match_ptr("regulators"), .owner = THIS_MODULE, .ops = &sc89890_otg_vbus_ops, .type = REGULATOR_VOLTAGE, .fixed_uV = 5000000, .n_voltages = 1, }; static int sc89890_register_otg_vbus_regulator(struct sc89890_device *sc) { struct regulator_config config = { }; struct device_node *np; np = of_get_child_by_name(sc->dev->of_node, "regulators"); if (!np) { dev_warn(sc->dev, "cannot find regulators node\n"); return 0; } sc->gpiod_otg_en = devm_gpiod_get_optional(sc->dev, "otg-en", GPIOD_OUT_LOW); if (IS_ERR_OR_NULL(sc->gpiod_otg_en)) dev_warn(sc->dev, "failed to request GPIO otg en pin\n"); config.dev = sc->dev; config.driver_data = sc; sc->otg_vbus_reg = devm_regulator_register(sc->dev, &sc89890_otg_vbus_desc, &config); if (IS_ERR(sc->otg_vbus_reg)) return PTR_ERR(sc->otg_vbus_reg); return 0; } static ssize_t registers_show(struct device *dev, struct device_attribute *attr, char *buf) { struct sc89890_device *sc89890 = dev_get_drvdata(dev); u8 tmpbuf[SC89890_DEBUG_BUF_LEN]; int idx = 0; u8 addr; int val; int len; int ret; sc89890_field_write(sc89890, F_CONV_START, 1); regmap_field_read_poll_timeout(sc89890->rmap_fields[F_CONV_START], ret, !ret, 25000, 1000000); for (addr = 0x0; addr <= 0x14; addr++) { ret = regmap_read(sc89890->rmap, addr, &val); if (ret == 0) { len = snprintf(tmpbuf, SC89890_DEBUG_BUF_LEN, "Reg[%.2X] = 0x%.2x\n", addr, val); memcpy(&buf[idx], tmpbuf, len); idx += len; } } val = sc89890_find_val(sc89890->init_data.vreg, TBL_VREG); pr_info("CHARGE_VOLTAGE_MAX: %d\n", val / 1000); val = sc89890_find_val(sc89890->init_data.iprechg, TBL_ITERM); pr_info("PRECHARGE_CURRENT: %d\n", val / 1000); val = sc89890_find_val(sc89890->init_data.iterm, TBL_ITERM); pr_info("CHARGE_TERM_CURRENT: %d\n", val / 1000); ret = sc89890_field_read(sc89890, F_BATV); /* read measured value */ if (ret) dev_err(dev, "read F_BAT error!\n"); else { /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ val = 2304000 + ret * 20000; pr_info("charge voltage: %d\n", val / 1000); } ret = sc89890_field_read(sc89890, F_IILIM); if (ret) dev_err(dev, "read F_IILIM error!\n"); else { val = sc89890_find_val(ret, TBL_IILIM); pr_info("INPUT_CURRENT_LIMIT: %d\n", val / 1000); } ret = sc89890_field_read(sc89890, F_SYSV); /* read measured value */ if (ret) dev_err(dev, "read F_SYSV error!\n"); else { /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ val = 2304000 + ret * 20000; pr_info("VOLTAGE_NOW: %d\n", val / 1000); } ret = sc89890_field_read(sc89890, F_ICHGR); /* read measured value */ if (ret) dev_err(dev, "read F_ICHRG error!\n"); else { /* converted_val = ADC_val * 50mA (table 10.3.19) */ val = ret * -50000; pr_info("CURRENT_NOW: %d\n", val / 1000); } return idx; } static ssize_t registers_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sc89890_device *sc89890 = dev_get_drvdata(dev); int ret; unsigned int reg; int val; ret = sscanf(buf, "%x %x", ®, &val); if (ret == 2 && reg <= 0x14) regmap_write(sc89890->rmap, (unsigned char)reg, val); return count; } static DEVICE_ATTR_RW(registers); static void sc89890_create_device_node(struct device *dev) { device_create_file(dev, &dev_attr_registers); } static int sc89890_fw_read_u32_props(struct sc89890_device *sc89890) { struct sc89890_init_data *init = &sc89890->init_data; u32 property; int ret; int i; struct { char *name; bool optional; enum sc89890_table_ids tbl_id; u8 *conv_data; /* holds converted value from given property */ } props[] = { /* required properties */ {"sc,charge-current", false, TBL_ICHG, &init->ichg}, {"sc,battery-regulation-voltage", false, TBL_VREG, &init->vreg}, {"sc,termination-current", false, TBL_ITERM, &init->iterm}, {"sc,precharge-current", false, TBL_ITERM, &init->iprechg}, {"sc,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin}, {"sc,boost-voltage", false, TBL_BOOSTV, &init->boostv}, {"sc,boost-max-current", false, TBL_BOOSTI, &init->boosti}, /* optional properties */ {"sc,thermal-regulation-threshold", true, TBL_TREG, &init->treg}, {"sc,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp}, {"sc,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp}, }; /* initialize data for optional properties */ init->treg = 3; /* 120 degrees Celsius */ init->rbatcomp = 0; init->vclamp = 0; /* IBAT compensation disabled */ for (i = 0; i < ARRAY_SIZE(props); i++) { ret = device_property_read_u32(sc89890->dev, props[i].name, &property); if (ret < 0) { if (props[i].optional) continue; dev_err(sc89890->dev, "Unable to read property %d %s\n", ret, props[i].name); return ret; } *props[i].conv_data = sc89890_find_idx(property, props[i].tbl_id); } return 0; } static int sc89890_fw_probe(struct sc89890_device *sc89890) { int ret; struct sc89890_init_data *init = &sc89890->init_data; ret = sc89890_fw_read_u32_props(sc89890); if (ret < 0) return ret; init->ilim_en = device_property_read_bool(sc89890->dev, "sc,use-ilim-pin"); init->boostf = device_property_read_bool(sc89890->dev, "sc,boost-low-freq"); return 0; } static int sc89890_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct sc89890_device *sc89890; int ret; int i; sc89890 = devm_kzalloc(dev, sizeof(*sc89890), GFP_KERNEL); if (!sc89890) return -ENOMEM; sc89890->client = client; sc89890->dev = dev; mutex_init(&sc89890->lock); sc89890->rmap = devm_regmap_init_i2c(client, &sc89890_regmap_config); if (IS_ERR(sc89890->rmap)) { dev_err(dev, "failed to allocate register map\n"); return PTR_ERR(sc89890->rmap); } for (i = 0; i < ARRAY_SIZE(sc89890_reg_fields); i++) { const struct reg_field *reg_fields = sc89890_reg_fields; sc89890->rmap_fields[i] = devm_regmap_field_alloc(dev, sc89890->rmap, reg_fields[i]); if (IS_ERR(sc89890->rmap_fields[i])) { dev_err(dev, "cannot allocate regmap field\n"); return PTR_ERR(sc89890->rmap_fields[i]); } } i2c_set_clientdata(client, sc89890); ret = sc89890_get_chip_version(sc89890); if (ret) { dev_err(dev, "Cannot read chip ID or unknown chip.\n"); return ret; } ret = sc89890_power_supply_init(sc89890); if (ret < 0) { dev_err(dev, "Failed to register power supply\n"); goto irq_fail; } if (!dev->platform_data) { ret = sc89890_fw_probe(sc89890); if (ret < 0) { dev_err(dev, "Cannot read device properties.\n"); return ret; } } else { return -ENODEV; } ret = sc89890_hw_init(sc89890); if (ret < 0) { dev_err(dev, "Cannot initialize the chip.\n"); return ret; } if (client->irq < 0) { dev_err(dev, "No irq resource found.\n"); return client->irq; } ret = devm_request_threaded_irq(dev, client->irq, NULL, sc89890_irq_handler_thread, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, SC89890_IRQ, sc89890); if (ret) goto irq_fail; ret = sc89890_register_otg_vbus_regulator(sc89890); if (ret) return ret; sc89890_create_device_node(sc89890->dev); return 0; irq_fail: return ret; } static void sc89890_remove(struct i2c_client *client) { struct sc89890_device *sc89890 = i2c_get_clientdata(client); /* reset all registers to default values */ sc89890_chip_reset(sc89890); } #ifdef CONFIG_PM_SLEEP static int sc89890_suspend(struct device *dev) { struct sc89890_device *sc89890 = dev_get_drvdata(dev); /* * If charger is removed, while in suspend, make sure ADC is disabled * since it consumes slightly more power. */ return sc89890_field_write(sc89890, F_CONV_RATE, 0); } static int sc89890_resume(struct device *dev) { int ret; struct sc89890_device *sc89890 = dev_get_drvdata(dev); mutex_lock(&sc89890->lock); ret = sc89890_get_chip_state(sc89890, &sc89890->state); if (ret < 0) goto unlock; /* Re-enable ADC only if charger is plugged in. */ if (sc89890->state.online) { ret = sc89890_field_write(sc89890, F_CONV_RATE, 1); if (ret < 0) goto unlock; } /* signal userspace, maybe state changed while suspended */ power_supply_changed(sc89890->charger); unlock: mutex_unlock(&sc89890->lock); return ret; } #endif static const struct dev_pm_ops sc89890_pm = { SET_SYSTEM_SLEEP_PM_OPS(sc89890_suspend, sc89890_resume) }; static const struct i2c_device_id sc89890_i2c_ids[] = { { "sc89890", 0 }, {}, }; MODULE_DEVICE_TABLE(i2c, sc89890_i2c_ids); static const struct of_device_id sc89890_of_match[] = { { .compatible = "sc,sc89890", }, { }, }; MODULE_DEVICE_TABLE(of, sc89890_of_match); #ifdef CONFIG_ACPI static const struct acpi_device_id sc89890_acpi_match[] = { {"SC898900", 0}, {}, }; MODULE_DEVICE_TABLE(acpi, sc89890_acpi_match); #endif static struct i2c_driver sc89890_driver = { .driver = { .name = "sc89890-charger", .of_match_table = of_match_ptr(sc89890_of_match), .acpi_match_table = ACPI_PTR(sc89890_acpi_match), .pm = &sc89890_pm, }, .probe = sc89890_probe, .remove = sc89890_remove, .id_table = sc89890_i2c_ids, }; module_i2c_driver(sc89890_driver); MODULE_AUTHOR("xsf"); MODULE_DESCRIPTION("sc89890 charger driver"); MODULE_LICENSE("GPL");