| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * TI BQ25890 charger driver |
| * |
| * Copyright (C) 2015 Intel Corporation |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/i2c.h> |
| #include <linux/power_supply.h> |
| #include <linux/regmap.h> |
| #include <linux/types.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/usb/phy.h> |
| |
| #include <linux/acpi.h> |
| #include <linux/of.h> |
| |
| #define BQ25890_MANUFACTURER "Texas Instruments" |
| #define BQ25890_IRQ_PIN "bq25890_irq" |
| |
| #define BQ25890_ID 3 |
| #define BQ25895_ID 7 |
| #define BQ25896_ID 0 |
| |
| enum bq25890_chip_version { |
| BQ25890, |
| BQ25892, |
| BQ25895, |
| BQ25896, |
| }; |
| |
| static const char *const bq25890_chip_name[] = { |
| "BQ25890", |
| "BQ25892", |
| "BQ25895", |
| "BQ25896", |
| }; |
| |
| enum bq25890_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 bq25890_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 bq25890_state { |
| u8 online; |
| u8 chrg_status; |
| u8 chrg_fault; |
| u8 vsys_status; |
| u8 boost_fault; |
| u8 bat_fault; |
| }; |
| |
| struct bq25890_device { |
| struct i2c_client *client; |
| struct device *dev; |
| struct power_supply *charger; |
| |
| struct usb_phy *usb_phy; |
| struct notifier_block usb_nb; |
| struct work_struct usb_work; |
| unsigned long usb_event; |
| |
| struct regmap *rmap; |
| struct regmap_field *rmap_fields[F_MAX_FIELDS]; |
| |
| enum bq25890_chip_version chip_version; |
| struct bq25890_init_data init_data; |
| struct bq25890_state state; |
| |
| struct mutex lock; /* protect state data */ |
| }; |
| |
| static const struct regmap_range bq25890_readonly_reg_ranges[] = { |
| regmap_reg_range(0x0b, 0x0c), |
| regmap_reg_range(0x0e, 0x13), |
| }; |
| |
| static const struct regmap_access_table bq25890_writeable_regs = { |
| .no_ranges = bq25890_readonly_reg_ranges, |
| .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges), |
| }; |
| |
| static const struct regmap_range bq25890_volatile_reg_ranges[] = { |
| regmap_reg_range(0x00, 0x00), |
| regmap_reg_range(0x02, 0x02), |
| regmap_reg_range(0x09, 0x09), |
| regmap_reg_range(0x0b, 0x14), |
| }; |
| |
| static const struct regmap_access_table bq25890_volatile_regs = { |
| .yes_ranges = bq25890_volatile_reg_ranges, |
| .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges), |
| }; |
| |
| static const struct regmap_config bq25890_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| |
| .max_register = 0x14, |
| .cache_type = REGCACHE_RBTREE, |
| |
| .wr_table = &bq25890_writeable_regs, |
| .volatile_table = &bq25890_volatile_regs, |
| }; |
| |
| static const struct reg_field bq25890_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), // reserved on BQ25896 |
| [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896 |
| [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), // BQ25896 only |
| /* 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), // reserved on BQ25895 |
| /* 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), // reserved on BQ25895 |
| [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), // reserved on BQ25895 |
| [F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), // BQ25896 only |
| /* 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), // reserved on BQ25896 |
| [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) |
| }; |
| |
| /* |
| * 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 bq25890_table_ids { |
| /* range tables */ |
| TBL_ICHG, |
| TBL_ITERM, |
| TBL_IILIM, |
| TBL_VREG, |
| TBL_BOOSTV, |
| TBL_SYSVMIN, |
| TBL_VBATCOMP, |
| TBL_RBATCOMP, |
| |
| /* lookup tables */ |
| TBL_TREG, |
| TBL_BOOSTI, |
| }; |
| |
| /* Thermal Regulation Threshold lookup table, in degrees Celsius */ |
| static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 }; |
| |
| #define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl) |
| |
| /* Boost mode current limit lookup table, in uA */ |
| static const u32 bq25890_boosti_tbl[] = { |
| 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000 |
| }; |
| |
| #define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl) |
| |
| struct bq25890_range { |
| u32 min; |
| u32 max; |
| u32 step; |
| }; |
| |
| struct bq25890_lookup { |
| const u32 *tbl; |
| u32 size; |
| }; |
| |
| static const union { |
| struct bq25890_range rt; |
| struct bq25890_lookup lt; |
| } bq25890_tables[] = { |
| /* range tables */ |
| /* TODO: BQ25896 has max ICHG 3008 mA */ |
| [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */ |
| [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */ |
| [TBL_IILIM] = { .rt = {50000, 3200000, 50000} }, /* uA */ |
| [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */ |
| [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */ |
| [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */ |
| [TBL_VBATCOMP] ={ .rt = {0, 224000, 32000} }, /* uV */ |
| [TBL_RBATCOMP] ={ .rt = {0, 140000, 20000} }, /* uOhm */ |
| |
| /* lookup tables */ |
| [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} }, |
| [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} } |
| }; |
| |
| static int bq25890_field_read(struct bq25890_device *bq, |
| enum bq25890_fields field_id) |
| { |
| int ret; |
| int val; |
| |
| ret = regmap_field_read(bq->rmap_fields[field_id], &val); |
| if (ret < 0) |
| return ret; |
| |
| return val; |
| } |
| |
| static int bq25890_field_write(struct bq25890_device *bq, |
| enum bq25890_fields field_id, u8 val) |
| { |
| return regmap_field_write(bq->rmap_fields[field_id], val); |
| } |
| |
| static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id) |
| { |
| u8 idx; |
| |
| if (id >= TBL_TREG) { |
| const u32 *tbl = bq25890_tables[id].lt.tbl; |
| u32 tbl_size = bq25890_tables[id].lt.size; |
| |
| for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++) |
| ; |
| } else { |
| const struct bq25890_range *rtbl = &bq25890_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 bq25890_find_val(u8 idx, enum bq25890_table_ids id) |
| { |
| const struct bq25890_range *rtbl; |
| |
| /* lookup table? */ |
| if (id >= TBL_TREG) |
| return bq25890_tables[id].lt.tbl[idx]; |
| |
| /* range table */ |
| rtbl = &bq25890_tables[id].rt; |
| |
| return (rtbl->min + idx * rtbl->step); |
| } |
| |
| enum bq25890_status { |
| STATUS_NOT_CHARGING, |
| STATUS_PRE_CHARGING, |
| STATUS_FAST_CHARGING, |
| STATUS_TERMINATION_DONE, |
| }; |
| |
| enum bq25890_chrg_fault { |
| CHRG_FAULT_NORMAL, |
| CHRG_FAULT_INPUT, |
| CHRG_FAULT_THERMAL_SHUTDOWN, |
| CHRG_FAULT_TIMER_EXPIRED, |
| }; |
| |
| static bool bq25890_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 irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq); |
| |
| static int bq25890_power_supply_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct bq25890_device *bq = power_supply_get_drvdata(psy); |
| struct bq25890_state state; |
| bool do_adc_conv; |
| int ret; |
| |
| mutex_lock(&bq->lock); |
| /* update state in case we lost an interrupt */ |
| __bq25890_handle_irq(bq); |
| state = bq->state; |
| do_adc_conv = !state.online && bq25890_is_adc_property(psp); |
| if (do_adc_conv) |
| bq25890_field_write(bq, F_CONV_START, 1); |
| mutex_unlock(&bq->lock); |
| |
| if (do_adc_conv) |
| regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START], |
| ret, !ret, 25000, 1000000); |
| |
| 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 = BQ25890_MANUFACTURER; |
| break; |
| |
| case POWER_SUPPLY_PROP_MODEL_NAME: |
| val->strval = bq25890_chip_name[bq->chip_version]; |
| break; |
| |
| case POWER_SUPPLY_PROP_ONLINE: |
| val->intval = state.online; |
| 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 = bq25890_find_val(bq->init_data.ichg, TBL_ICHG); |
| break; |
| |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
| if (!state.online) { |
| val->intval = 0; |
| break; |
| } |
| |
| ret = bq25890_field_read(bq, 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 = bq25890_find_val(bq->init_data.vreg, TBL_VREG); |
| break; |
| |
| case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: |
| val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM); |
| break; |
| |
| case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: |
| val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM); |
| break; |
| |
| case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
| ret = bq25890_field_read(bq, F_IILIM); |
| if (ret < 0) |
| return ret; |
| |
| val->intval = bq25890_find_val(ret, TBL_IILIM); |
| break; |
| |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| ret = bq25890_field_read(bq, 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 = bq25890_field_read(bq, 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 bq25890_get_chip_state(struct bq25890_device *bq, |
| struct bq25890_state *state) |
| { |
| int i, ret; |
| |
| struct { |
| enum bq25890_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 = bq25890_field_read(bq, state_fields[i].id); |
| if (ret < 0) |
| return ret; |
| |
| *state_fields[i].data = ret; |
| } |
| |
| dev_dbg(bq->dev, "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 __bq25890_handle_irq(struct bq25890_device *bq) |
| { |
| struct bq25890_state new_state; |
| int ret; |
| |
| ret = bq25890_get_chip_state(bq, &new_state); |
| if (ret < 0) |
| return IRQ_NONE; |
| |
| if (!memcmp(&bq->state, &new_state, sizeof(new_state))) |
| return IRQ_NONE; |
| |
| if (!new_state.online && bq->state.online) { /* power removed */ |
| /* disable ADC */ |
| ret = bq25890_field_write(bq, F_CONV_START, 0); |
| if (ret < 0) |
| goto error; |
| } else if (new_state.online && !bq->state.online) { /* power inserted */ |
| /* enable ADC, to have control of charge current/voltage */ |
| ret = bq25890_field_write(bq, F_CONV_START, 1); |
| if (ret < 0) |
| goto error; |
| } |
| |
| bq->state = new_state; |
| power_supply_changed(bq->charger); |
| |
| return IRQ_HANDLED; |
| error: |
| dev_err(bq->dev, "Error communicating with the chip: %pe\n", |
| ERR_PTR(ret)); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t bq25890_irq_handler_thread(int irq, void *private) |
| { |
| struct bq25890_device *bq = private; |
| irqreturn_t ret; |
| |
| mutex_lock(&bq->lock); |
| ret = __bq25890_handle_irq(bq); |
| mutex_unlock(&bq->lock); |
| |
| return ret; |
| } |
| |
| static int bq25890_chip_reset(struct bq25890_device *bq) |
| { |
| int ret; |
| int rst_check_counter = 10; |
| |
| ret = bq25890_field_write(bq, F_REG_RST, 1); |
| if (ret < 0) |
| return ret; |
| |
| do { |
| ret = bq25890_field_read(bq, 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 bq25890_hw_init(struct bq25890_device *bq) |
| { |
| int ret; |
| int i; |
| |
| const struct { |
| enum bq25890_fields id; |
| u32 value; |
| } init_data[] = { |
| {F_ICHG, bq->init_data.ichg}, |
| {F_VREG, bq->init_data.vreg}, |
| {F_ITERM, bq->init_data.iterm}, |
| {F_IPRECHG, bq->init_data.iprechg}, |
| {F_SYSVMIN, bq->init_data.sysvmin}, |
| {F_BOOSTV, bq->init_data.boostv}, |
| {F_BOOSTI, bq->init_data.boosti}, |
| {F_BOOSTF, bq->init_data.boostf}, |
| {F_EN_ILIM, bq->init_data.ilim_en}, |
| {F_TREG, bq->init_data.treg}, |
| {F_BATCMP, bq->init_data.rbatcomp}, |
| {F_VCLAMP, bq->init_data.vclamp}, |
| }; |
| |
| ret = bq25890_chip_reset(bq); |
| if (ret < 0) { |
| dev_dbg(bq->dev, "Reset failed %d\n", ret); |
| return ret; |
| } |
| |
| /* disable watchdog */ |
| ret = bq25890_field_write(bq, F_WD, 0); |
| if (ret < 0) { |
| dev_dbg(bq->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 = bq25890_field_write(bq, init_data[i].id, |
| init_data[i].value); |
| if (ret < 0) { |
| dev_dbg(bq->dev, "Writing init data failed %d\n", ret); |
| return ret; |
| } |
| } |
| |
| /* Configure ADC for continuous conversions when charging */ |
| ret = bq25890_field_write(bq, F_CONV_RATE, !!bq->state.online); |
| if (ret < 0) { |
| dev_dbg(bq->dev, "Config ADC failed %d\n", ret); |
| return ret; |
| } |
| |
| ret = bq25890_get_chip_state(bq, &bq->state); |
| if (ret < 0) { |
| dev_dbg(bq->dev, "Get state failed %d\n", ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static const enum power_supply_property bq25890_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_CURRENT_LIMIT, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| }; |
| |
| static char *bq25890_charger_supplied_to[] = { |
| "main-battery", |
| }; |
| |
| static const struct power_supply_desc bq25890_power_supply_desc = { |
| .name = "bq25890-charger", |
| .type = POWER_SUPPLY_TYPE_USB, |
| .properties = bq25890_power_supply_props, |
| .num_properties = ARRAY_SIZE(bq25890_power_supply_props), |
| .get_property = bq25890_power_supply_get_property, |
| }; |
| |
| static int bq25890_power_supply_init(struct bq25890_device *bq) |
| { |
| struct power_supply_config psy_cfg = { .drv_data = bq, }; |
| |
| psy_cfg.supplied_to = bq25890_charger_supplied_to; |
| psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to); |
| |
| bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc, |
| &psy_cfg); |
| |
| return PTR_ERR_OR_ZERO(bq->charger); |
| } |
| |
| static void bq25890_usb_work(struct work_struct *data) |
| { |
| int ret; |
| struct bq25890_device *bq = |
| container_of(data, struct bq25890_device, usb_work); |
| |
| switch (bq->usb_event) { |
| case USB_EVENT_ID: |
| /* Enable boost mode */ |
| ret = bq25890_field_write(bq, F_OTG_CFG, 1); |
| if (ret < 0) |
| goto error; |
| break; |
| |
| case USB_EVENT_NONE: |
| /* Disable boost mode */ |
| ret = bq25890_field_write(bq, F_OTG_CFG, 0); |
| if (ret < 0) |
| goto error; |
| |
| power_supply_changed(bq->charger); |
| break; |
| } |
| |
| return; |
| |
| error: |
| dev_err(bq->dev, "Error switching to boost/charger mode.\n"); |
| } |
| |
| static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val, |
| void *priv) |
| { |
| struct bq25890_device *bq = |
| container_of(nb, struct bq25890_device, usb_nb); |
| |
| bq->usb_event = val; |
| queue_work(system_power_efficient_wq, &bq->usb_work); |
| |
| return NOTIFY_OK; |
| } |
| |
| static int bq25890_get_chip_version(struct bq25890_device *bq) |
| { |
| int id, rev; |
| |
| id = bq25890_field_read(bq, F_PN); |
| if (id < 0) { |
| dev_err(bq->dev, "Cannot read chip ID.\n"); |
| return id; |
| } |
| |
| rev = bq25890_field_read(bq, F_DEV_REV); |
| if (rev < 0) { |
| dev_err(bq->dev, "Cannot read chip revision.\n"); |
| return rev; |
| } |
| |
| switch (id) { |
| case BQ25890_ID: |
| bq->chip_version = BQ25890; |
| break; |
| |
| /* BQ25892 and BQ25896 share same ID 0 */ |
| case BQ25896_ID: |
| switch (rev) { |
| case 2: |
| bq->chip_version = BQ25896; |
| break; |
| case 1: |
| bq->chip_version = BQ25892; |
| break; |
| default: |
| dev_err(bq->dev, |
| "Unknown device revision %d, assume BQ25892\n", |
| rev); |
| bq->chip_version = BQ25892; |
| } |
| break; |
| |
| case BQ25895_ID: |
| bq->chip_version = BQ25895; |
| break; |
| |
| default: |
| dev_err(bq->dev, "Unknown chip ID %d\n", id); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static int bq25890_irq_probe(struct bq25890_device *bq) |
| { |
| struct gpio_desc *irq; |
| |
| irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN); |
| if (IS_ERR(irq)) { |
| dev_err(bq->dev, "Could not probe irq pin.\n"); |
| return PTR_ERR(irq); |
| } |
| |
| return gpiod_to_irq(irq); |
| } |
| |
| static int bq25890_fw_read_u32_props(struct bq25890_device *bq) |
| { |
| int ret; |
| u32 property; |
| int i; |
| struct bq25890_init_data *init = &bq->init_data; |
| struct { |
| char *name; |
| bool optional; |
| enum bq25890_table_ids tbl_id; |
| u8 *conv_data; /* holds converted value from given property */ |
| } props[] = { |
| /* required properties */ |
| {"ti,charge-current", false, TBL_ICHG, &init->ichg}, |
| {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg}, |
| {"ti,termination-current", false, TBL_ITERM, &init->iterm}, |
| {"ti,precharge-current", false, TBL_ITERM, &init->iprechg}, |
| {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin}, |
| {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv}, |
| {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti}, |
| |
| /* optional properties */ |
| {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}, |
| {"ti,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp}, |
| {"ti,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp}, |
| }; |
| |
| /* initialize data for optional properties */ |
| init->treg = 3; /* 120 degrees Celsius */ |
| init->rbatcomp = init->vclamp = 0; /* IBAT compensation disabled */ |
| |
| for (i = 0; i < ARRAY_SIZE(props); i++) { |
| ret = device_property_read_u32(bq->dev, props[i].name, |
| &property); |
| if (ret < 0) { |
| if (props[i].optional) |
| continue; |
| |
| dev_err(bq->dev, "Unable to read property %d %s\n", ret, |
| props[i].name); |
| |
| return ret; |
| } |
| |
| *props[i].conv_data = bq25890_find_idx(property, |
| props[i].tbl_id); |
| } |
| |
| return 0; |
| } |
| |
| static int bq25890_fw_probe(struct bq25890_device *bq) |
| { |
| int ret; |
| struct bq25890_init_data *init = &bq->init_data; |
| |
| ret = bq25890_fw_read_u32_props(bq); |
| if (ret < 0) |
| return ret; |
| |
| init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin"); |
| init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq"); |
| |
| return 0; |
| } |
| |
| static int bq25890_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct device *dev = &client->dev; |
| struct bq25890_device *bq; |
| int ret; |
| int i; |
| |
| bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL); |
| if (!bq) |
| return -ENOMEM; |
| |
| bq->client = client; |
| bq->dev = dev; |
| |
| mutex_init(&bq->lock); |
| |
| bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config); |
| if (IS_ERR(bq->rmap)) { |
| dev_err(dev, "failed to allocate register map\n"); |
| return PTR_ERR(bq->rmap); |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) { |
| const struct reg_field *reg_fields = bq25890_reg_fields; |
| |
| bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap, |
| reg_fields[i]); |
| if (IS_ERR(bq->rmap_fields[i])) { |
| dev_err(dev, "cannot allocate regmap field\n"); |
| return PTR_ERR(bq->rmap_fields[i]); |
| } |
| } |
| |
| i2c_set_clientdata(client, bq); |
| |
| ret = bq25890_get_chip_version(bq); |
| if (ret) { |
| dev_err(dev, "Cannot read chip ID or unknown chip.\n"); |
| return ret; |
| } |
| |
| if (!dev->platform_data) { |
| ret = bq25890_fw_probe(bq); |
| if (ret < 0) { |
| dev_err(dev, "Cannot read device properties.\n"); |
| return ret; |
| } |
| } else { |
| return -ENODEV; |
| } |
| |
| ret = bq25890_hw_init(bq); |
| if (ret < 0) { |
| dev_err(dev, "Cannot initialize the chip.\n"); |
| return ret; |
| } |
| |
| if (client->irq <= 0) |
| client->irq = bq25890_irq_probe(bq); |
| |
| if (client->irq < 0) { |
| dev_err(dev, "No irq resource found.\n"); |
| return client->irq; |
| } |
| |
| /* OTG reporting */ |
| bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); |
| if (!IS_ERR_OR_NULL(bq->usb_phy)) { |
| INIT_WORK(&bq->usb_work, bq25890_usb_work); |
| bq->usb_nb.notifier_call = bq25890_usb_notifier; |
| usb_register_notifier(bq->usb_phy, &bq->usb_nb); |
| } |
| |
| ret = devm_request_threaded_irq(dev, client->irq, NULL, |
| bq25890_irq_handler_thread, |
| IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| BQ25890_IRQ_PIN, bq); |
| if (ret) |
| goto irq_fail; |
| |
| ret = bq25890_power_supply_init(bq); |
| if (ret < 0) { |
| dev_err(dev, "Failed to register power supply\n"); |
| goto irq_fail; |
| } |
| |
| return 0; |
| |
| irq_fail: |
| if (!IS_ERR_OR_NULL(bq->usb_phy)) |
| usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); |
| |
| return ret; |
| } |
| |
| static int bq25890_remove(struct i2c_client *client) |
| { |
| struct bq25890_device *bq = i2c_get_clientdata(client); |
| |
| power_supply_unregister(bq->charger); |
| |
| if (!IS_ERR_OR_NULL(bq->usb_phy)) |
| usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); |
| |
| /* reset all registers to default values */ |
| bq25890_chip_reset(bq); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int bq25890_suspend(struct device *dev) |
| { |
| struct bq25890_device *bq = dev_get_drvdata(dev); |
| |
| /* |
| * If charger is removed, while in suspend, make sure ADC is diabled |
| * since it consumes slightly more power. |
| */ |
| return bq25890_field_write(bq, F_CONV_RATE, 0); |
| } |
| |
| static int bq25890_resume(struct device *dev) |
| { |
| int ret; |
| struct bq25890_device *bq = dev_get_drvdata(dev); |
| |
| mutex_lock(&bq->lock); |
| |
| ret = bq25890_get_chip_state(bq, &bq->state); |
| if (ret < 0) |
| goto unlock; |
| |
| /* Re-enable ADC only if charger is plugged in. */ |
| if (bq->state.online) { |
| ret = bq25890_field_write(bq, F_CONV_RATE, 1); |
| if (ret < 0) |
| goto unlock; |
| } |
| |
| /* signal userspace, maybe state changed while suspended */ |
| power_supply_changed(bq->charger); |
| |
| unlock: |
| mutex_unlock(&bq->lock); |
| |
| return ret; |
| } |
| #endif |
| |
| static const struct dev_pm_ops bq25890_pm = { |
| SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume) |
| }; |
| |
| static const struct i2c_device_id bq25890_i2c_ids[] = { |
| { "bq25890", 0 }, |
| { "bq25892", 0 }, |
| { "bq25895", 0 }, |
| { "bq25896", 0 }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids); |
| |
| static const struct of_device_id bq25890_of_match[] = { |
| { .compatible = "ti,bq25890", }, |
| { .compatible = "ti,bq25892", }, |
| { .compatible = "ti,bq25895", }, |
| { .compatible = "ti,bq25896", }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, bq25890_of_match); |
| |
| #ifdef CONFIG_ACPI |
| static const struct acpi_device_id bq25890_acpi_match[] = { |
| {"BQ258900", 0}, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match); |
| #endif |
| |
| static struct i2c_driver bq25890_driver = { |
| .driver = { |
| .name = "bq25890-charger", |
| .of_match_table = of_match_ptr(bq25890_of_match), |
| .acpi_match_table = ACPI_PTR(bq25890_acpi_match), |
| .pm = &bq25890_pm, |
| }, |
| .probe = bq25890_probe, |
| .remove = bq25890_remove, |
| .id_table = bq25890_i2c_ids, |
| }; |
| module_i2c_driver(bq25890_driver); |
| |
| MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>"); |
| MODULE_DESCRIPTION("bq25890 charger driver"); |
| MODULE_LICENSE("GPL"); |