1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * TI BQ25890 charger driver
5 * Copyright (C) 2015 Intel Corporation
8 #include <linux/module.h>
10 #include <linux/power_supply.h>
11 #include <linux/regmap.h>
12 #include <linux/types.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/interrupt.h>
15 #include <linux/delay.h>
16 #include <linux/usb/phy.h>
18 #include <linux/acpi.h>
21 #define BQ25890_MANUFACTURER "Texas Instruments"
22 #define BQ25890_IRQ_PIN "bq25890_irq"
28 enum bq25890_chip_version {
35 static const char *const bq25890_chip_name[] = {
43 F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
44 F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
45 F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
46 F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
47 F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN,
48 F_MIN_VBAT_SEL, /* Reg03 */
49 F_PUMPX_EN, F_ICHG, /* Reg04 */
50 F_IPRECHG, F_ITERM, /* Reg05 */
51 F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
52 F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
53 F_JEITA_ISET, /* Reg07 */
54 F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
55 F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
56 F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
57 F_BOOSTV, F_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */
58 F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD,
59 F_VSYS_STAT, /* Reg0B */
60 F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
61 F_NTC_FAULT, /* Reg0C */
62 F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
63 F_THERM_STAT, F_BATV, /* Reg0E */
66 F_VBUS_GD, F_VBUSV, /* Reg11 */
68 F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
69 F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
74 /* initial field values, converted to register values */
75 struct bq25890_init_data {
76 u8 ichg; /* charge current */
77 u8 vreg; /* regulation voltage */
78 u8 iterm; /* termination current */
79 u8 iprechg; /* precharge current */
80 u8 sysvmin; /* minimum system voltage limit */
81 u8 boostv; /* boost regulation voltage */
82 u8 boosti; /* boost current limit */
83 u8 boostf; /* boost frequency */
84 u8 ilim_en; /* enable ILIM pin */
85 u8 treg; /* thermal regulation threshold */
88 struct bq25890_state {
97 struct bq25890_device {
98 struct i2c_client *client;
100 struct power_supply *charger;
102 struct usb_phy *usb_phy;
103 struct notifier_block usb_nb;
104 struct work_struct usb_work;
105 unsigned long usb_event;
108 struct regmap_field *rmap_fields[F_MAX_FIELDS];
110 enum bq25890_chip_version chip_version;
111 struct bq25890_init_data init_data;
112 struct bq25890_state state;
114 struct mutex lock; /* protect state data */
117 static const struct regmap_range bq25890_readonly_reg_ranges[] = {
118 regmap_reg_range(0x0b, 0x0c),
119 regmap_reg_range(0x0e, 0x13),
122 static const struct regmap_access_table bq25890_writeable_regs = {
123 .no_ranges = bq25890_readonly_reg_ranges,
124 .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
127 static const struct regmap_range bq25890_volatile_reg_ranges[] = {
128 regmap_reg_range(0x00, 0x00),
129 regmap_reg_range(0x02, 0x02),
130 regmap_reg_range(0x09, 0x09),
131 regmap_reg_range(0x0b, 0x14),
134 static const struct regmap_access_table bq25890_volatile_regs = {
135 .yes_ranges = bq25890_volatile_reg_ranges,
136 .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
139 static const struct regmap_config bq25890_regmap_config = {
143 .max_register = 0x14,
144 .cache_type = REGCACHE_RBTREE,
146 .wr_table = &bq25890_writeable_regs,
147 .volatile_table = &bq25890_volatile_regs,
150 static const struct reg_field bq25890_reg_fields[] = {
152 [F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
153 [F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
154 [F_IILIM] = REG_FIELD(0x00, 0, 5),
156 [F_BHOT] = REG_FIELD(0x01, 6, 7),
157 [F_BCOLD] = REG_FIELD(0x01, 5, 5),
158 [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
160 [F_CONV_START] = REG_FIELD(0x02, 7, 7),
161 [F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
162 [F_BOOSTF] = REG_FIELD(0x02, 5, 5),
163 [F_ICO_EN] = REG_FIELD(0x02, 4, 4),
164 [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
165 [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
166 [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
167 [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
169 [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
170 [F_WD_RST] = REG_FIELD(0x03, 6, 6),
171 [F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
172 [F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
173 [F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
174 [F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0), // BQ25896 only
176 [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
177 [F_ICHG] = REG_FIELD(0x04, 0, 6),
179 [F_IPRECHG] = REG_FIELD(0x05, 4, 7),
180 [F_ITERM] = REG_FIELD(0x05, 0, 3),
182 [F_VREG] = REG_FIELD(0x06, 2, 7),
183 [F_BATLOWV] = REG_FIELD(0x06, 1, 1),
184 [F_VRECHG] = REG_FIELD(0x06, 0, 0),
186 [F_TERM_EN] = REG_FIELD(0x07, 7, 7),
187 [F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
188 [F_WD] = REG_FIELD(0x07, 4, 5),
189 [F_TMR_EN] = REG_FIELD(0x07, 3, 3),
190 [F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
191 [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), // reserved on BQ25895
193 [F_BATCMP] = REG_FIELD(0x08, 5, 7),
194 [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
195 [F_TREG] = REG_FIELD(0x08, 0, 1),
197 [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
198 [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
199 [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
200 [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), // reserved on BQ25895
201 [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
202 [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
203 [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
204 [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
206 [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
207 [F_BOOSTI] = REG_FIELD(0x0A, 0, 2), // reserved on BQ25895
208 [F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), // BQ25896 only
210 [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
211 [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
212 [F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
213 [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
214 [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
216 [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
217 [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
218 [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
219 [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
220 [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
222 [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
223 [F_VINDPM] = REG_FIELD(0x0D, 0, 6),
225 [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
226 [F_BATV] = REG_FIELD(0x0E, 0, 6),
228 [F_SYSV] = REG_FIELD(0x0F, 0, 6),
230 [F_TSPCT] = REG_FIELD(0x10, 0, 6),
232 [F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
233 [F_VBUSV] = REG_FIELD(0x11, 0, 6),
235 [F_ICHGR] = REG_FIELD(0x12, 0, 6),
237 [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
238 [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
239 [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
241 [F_REG_RST] = REG_FIELD(0x14, 7, 7),
242 [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
243 [F_PN] = REG_FIELD(0x14, 3, 5),
244 [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
245 [F_DEV_REV] = REG_FIELD(0x14, 0, 1)
249 * Most of the val -> idx conversions can be computed, given the minimum,
250 * maximum and the step between values. For the rest of conversions, we use
253 enum bq25890_table_ids {
267 /* Thermal Regulation Threshold lookup table, in degrees Celsius */
268 static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
270 #define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
272 /* Boost mode current limit lookup table, in uA */
273 static const u32 bq25890_boosti_tbl[] = {
274 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
277 #define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
279 struct bq25890_range {
285 struct bq25890_lookup {
291 struct bq25890_range rt;
292 struct bq25890_lookup lt;
293 } bq25890_tables[] = {
295 /* TODO: BQ25896 has max ICHG 3008 mA */
296 [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
297 [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
298 [TBL_IILIM] = { .rt = {50000, 3200000, 50000} }, /* uA */
299 [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
300 [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
301 [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
304 [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
305 [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
308 static int bq25890_field_read(struct bq25890_device *bq,
309 enum bq25890_fields field_id)
314 ret = regmap_field_read(bq->rmap_fields[field_id], &val);
321 static int bq25890_field_write(struct bq25890_device *bq,
322 enum bq25890_fields field_id, u8 val)
324 return regmap_field_write(bq->rmap_fields[field_id], val);
327 static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
331 if (id >= TBL_TREG) {
332 const u32 *tbl = bq25890_tables[id].lt.tbl;
333 u32 tbl_size = bq25890_tables[id].lt.size;
335 for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
338 const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
341 rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
344 idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
352 static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
354 const struct bq25890_range *rtbl;
358 return bq25890_tables[id].lt.tbl[idx];
361 rtbl = &bq25890_tables[id].rt;
363 return (rtbl->min + idx * rtbl->step);
366 enum bq25890_status {
369 STATUS_FAST_CHARGING,
370 STATUS_TERMINATION_DONE,
373 enum bq25890_chrg_fault {
376 CHRG_FAULT_THERMAL_SHUTDOWN,
377 CHRG_FAULT_TIMER_EXPIRED,
380 static bool bq25890_is_adc_property(enum power_supply_property psp)
383 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
384 case POWER_SUPPLY_PROP_CURRENT_NOW:
392 static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq);
394 static int bq25890_power_supply_get_property(struct power_supply *psy,
395 enum power_supply_property psp,
396 union power_supply_propval *val)
398 struct bq25890_device *bq = power_supply_get_drvdata(psy);
399 struct bq25890_state state;
403 mutex_lock(&bq->lock);
404 /* update state in case we lost an interrupt */
405 __bq25890_handle_irq(bq);
407 do_adc_conv = !state.online && bq25890_is_adc_property(psp);
409 bq25890_field_write(bq, F_CONV_START, 1);
410 mutex_unlock(&bq->lock);
413 regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START],
414 ret, !ret, 25000, 1000000);
417 case POWER_SUPPLY_PROP_STATUS:
419 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
420 else if (state.chrg_status == STATUS_NOT_CHARGING)
421 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
422 else if (state.chrg_status == STATUS_PRE_CHARGING ||
423 state.chrg_status == STATUS_FAST_CHARGING)
424 val->intval = POWER_SUPPLY_STATUS_CHARGING;
425 else if (state.chrg_status == STATUS_TERMINATION_DONE)
426 val->intval = POWER_SUPPLY_STATUS_FULL;
428 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
432 case POWER_SUPPLY_PROP_CHARGE_TYPE:
433 if (!state.online || state.chrg_status == STATUS_NOT_CHARGING ||
434 state.chrg_status == STATUS_TERMINATION_DONE)
435 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
436 else if (state.chrg_status == STATUS_PRE_CHARGING)
437 val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
438 else if (state.chrg_status == STATUS_FAST_CHARGING)
439 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
440 else /* unreachable */
441 val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
444 case POWER_SUPPLY_PROP_MANUFACTURER:
445 val->strval = BQ25890_MANUFACTURER;
448 case POWER_SUPPLY_PROP_MODEL_NAME:
449 val->strval = bq25890_chip_name[bq->chip_version];
452 case POWER_SUPPLY_PROP_ONLINE:
453 val->intval = state.online;
456 case POWER_SUPPLY_PROP_HEALTH:
457 if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
458 val->intval = POWER_SUPPLY_HEALTH_GOOD;
459 else if (state.bat_fault)
460 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
461 else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
462 val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
463 else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
464 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
466 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
469 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
470 val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
473 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
479 ret = bq25890_field_read(bq, F_BATV); /* read measured value */
483 /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
484 val->intval = 2304000 + ret * 20000;
487 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
488 val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
491 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
492 val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM);
495 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
496 val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
499 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
500 ret = bq25890_field_read(bq, F_IILIM);
504 val->intval = bq25890_find_val(ret, TBL_IILIM);
507 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
508 ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
512 /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
513 val->intval = 2304000 + ret * 20000;
516 case POWER_SUPPLY_PROP_CURRENT_NOW:
517 ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
521 /* converted_val = ADC_val * 50mA (table 10.3.19) */
522 val->intval = ret * -50000;
532 static int bq25890_get_chip_state(struct bq25890_device *bq,
533 struct bq25890_state *state)
538 enum bq25890_fields id;
541 {F_CHG_STAT, &state->chrg_status},
542 {F_PG_STAT, &state->online},
543 {F_VSYS_STAT, &state->vsys_status},
544 {F_BOOST_FAULT, &state->boost_fault},
545 {F_BAT_FAULT, &state->bat_fault},
546 {F_CHG_FAULT, &state->chrg_fault}
549 for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
550 ret = bq25890_field_read(bq, state_fields[i].id);
554 *state_fields[i].data = ret;
557 dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n",
558 state->chrg_status, state->online, state->vsys_status,
559 state->chrg_fault, state->boost_fault, state->bat_fault);
564 static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq)
566 struct bq25890_state new_state;
569 ret = bq25890_get_chip_state(bq, &new_state);
573 if (!memcmp(&bq->state, &new_state, sizeof(new_state)))
576 if (!new_state.online && bq->state.online) { /* power removed */
578 ret = bq25890_field_write(bq, F_CONV_START, 0);
581 } else if (new_state.online && !bq->state.online) { /* power inserted */
582 /* enable ADC, to have control of charge current/voltage */
583 ret = bq25890_field_write(bq, F_CONV_START, 1);
588 bq->state = new_state;
589 power_supply_changed(bq->charger);
593 dev_err(bq->dev, "Error communicating with the chip: %pe\n",
598 static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
600 struct bq25890_device *bq = private;
603 mutex_lock(&bq->lock);
604 ret = __bq25890_handle_irq(bq);
605 mutex_unlock(&bq->lock);
610 static int bq25890_chip_reset(struct bq25890_device *bq)
613 int rst_check_counter = 10;
615 ret = bq25890_field_write(bq, F_REG_RST, 1);
620 ret = bq25890_field_read(bq, F_REG_RST);
625 } while (ret == 1 && --rst_check_counter);
627 if (!rst_check_counter)
633 static int bq25890_hw_init(struct bq25890_device *bq)
639 enum bq25890_fields id;
642 {F_ICHG, bq->init_data.ichg},
643 {F_VREG, bq->init_data.vreg},
644 {F_ITERM, bq->init_data.iterm},
645 {F_IPRECHG, bq->init_data.iprechg},
646 {F_SYSVMIN, bq->init_data.sysvmin},
647 {F_BOOSTV, bq->init_data.boostv},
648 {F_BOOSTI, bq->init_data.boosti},
649 {F_BOOSTF, bq->init_data.boostf},
650 {F_EN_ILIM, bq->init_data.ilim_en},
651 {F_TREG, bq->init_data.treg}
654 ret = bq25890_chip_reset(bq);
656 dev_dbg(bq->dev, "Reset failed %d\n", ret);
660 /* disable watchdog */
661 ret = bq25890_field_write(bq, F_WD, 0);
663 dev_dbg(bq->dev, "Disabling watchdog failed %d\n", ret);
667 /* initialize currents/voltages and other parameters */
668 for (i = 0; i < ARRAY_SIZE(init_data); i++) {
669 ret = bq25890_field_write(bq, init_data[i].id,
672 dev_dbg(bq->dev, "Writing init data failed %d\n", ret);
677 /* Configure ADC for continuous conversions when charging */
678 ret = bq25890_field_write(bq, F_CONV_RATE, !!bq->state.online);
680 dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
684 ret = bq25890_get_chip_state(bq, &bq->state);
686 dev_dbg(bq->dev, "Get state failed %d\n", ret);
693 static const enum power_supply_property bq25890_power_supply_props[] = {
694 POWER_SUPPLY_PROP_MANUFACTURER,
695 POWER_SUPPLY_PROP_MODEL_NAME,
696 POWER_SUPPLY_PROP_STATUS,
697 POWER_SUPPLY_PROP_CHARGE_TYPE,
698 POWER_SUPPLY_PROP_ONLINE,
699 POWER_SUPPLY_PROP_HEALTH,
700 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
701 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
702 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
703 POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
704 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
705 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
706 POWER_SUPPLY_PROP_VOLTAGE_NOW,
707 POWER_SUPPLY_PROP_CURRENT_NOW,
710 static char *bq25890_charger_supplied_to[] = {
714 static const struct power_supply_desc bq25890_power_supply_desc = {
715 .name = "bq25890-charger",
716 .type = POWER_SUPPLY_TYPE_USB,
717 .properties = bq25890_power_supply_props,
718 .num_properties = ARRAY_SIZE(bq25890_power_supply_props),
719 .get_property = bq25890_power_supply_get_property,
722 static int bq25890_power_supply_init(struct bq25890_device *bq)
724 struct power_supply_config psy_cfg = { .drv_data = bq, };
726 psy_cfg.supplied_to = bq25890_charger_supplied_to;
727 psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
729 bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc,
732 return PTR_ERR_OR_ZERO(bq->charger);
735 static void bq25890_usb_work(struct work_struct *data)
738 struct bq25890_device *bq =
739 container_of(data, struct bq25890_device, usb_work);
741 switch (bq->usb_event) {
743 /* Enable boost mode */
744 ret = bq25890_field_write(bq, F_OTG_CFG, 1);
750 /* Disable boost mode */
751 ret = bq25890_field_write(bq, F_OTG_CFG, 0);
755 power_supply_changed(bq->charger);
762 dev_err(bq->dev, "Error switching to boost/charger mode.\n");
765 static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
768 struct bq25890_device *bq =
769 container_of(nb, struct bq25890_device, usb_nb);
772 queue_work(system_power_efficient_wq, &bq->usb_work);
777 static int bq25890_get_chip_version(struct bq25890_device *bq)
781 id = bq25890_field_read(bq, F_PN);
783 dev_err(bq->dev, "Cannot read chip ID.\n");
787 rev = bq25890_field_read(bq, F_DEV_REV);
789 dev_err(bq->dev, "Cannot read chip revision.\n");
795 bq->chip_version = BQ25890;
798 /* BQ25892 and BQ25896 share same ID 0 */
802 bq->chip_version = BQ25896;
805 bq->chip_version = BQ25892;
809 "Unknown device revision %d, assume BQ25892\n",
811 bq->chip_version = BQ25892;
816 bq->chip_version = BQ25895;
820 dev_err(bq->dev, "Unknown chip ID %d\n", id);
827 static int bq25890_irq_probe(struct bq25890_device *bq)
829 struct gpio_desc *irq;
831 irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN);
833 dev_err(bq->dev, "Could not probe irq pin.\n");
837 return gpiod_to_irq(irq);
840 static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
845 struct bq25890_init_data *init = &bq->init_data;
849 enum bq25890_table_ids tbl_id;
850 u8 *conv_data; /* holds converted value from given property */
852 /* required properties */
853 {"ti,charge-current", false, TBL_ICHG, &init->ichg},
854 {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
855 {"ti,termination-current", false, TBL_ITERM, &init->iterm},
856 {"ti,precharge-current", false, TBL_ITERM, &init->iprechg},
857 {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
858 {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv},
859 {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
861 /* optional properties */
862 {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
865 /* initialize data for optional properties */
866 init->treg = 3; /* 120 degrees Celsius */
868 for (i = 0; i < ARRAY_SIZE(props); i++) {
869 ret = device_property_read_u32(bq->dev, props[i].name,
872 if (props[i].optional)
875 dev_err(bq->dev, "Unable to read property %d %s\n", ret,
881 *props[i].conv_data = bq25890_find_idx(property,
888 static int bq25890_fw_probe(struct bq25890_device *bq)
891 struct bq25890_init_data *init = &bq->init_data;
893 ret = bq25890_fw_read_u32_props(bq);
897 init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin");
898 init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq");
903 static int bq25890_probe(struct i2c_client *client,
904 const struct i2c_device_id *id)
906 struct device *dev = &client->dev;
907 struct bq25890_device *bq;
911 bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
918 mutex_init(&bq->lock);
920 bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
921 if (IS_ERR(bq->rmap)) {
922 dev_err(dev, "failed to allocate register map\n");
923 return PTR_ERR(bq->rmap);
926 for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) {
927 const struct reg_field *reg_fields = bq25890_reg_fields;
929 bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
931 if (IS_ERR(bq->rmap_fields[i])) {
932 dev_err(dev, "cannot allocate regmap field\n");
933 return PTR_ERR(bq->rmap_fields[i]);
937 i2c_set_clientdata(client, bq);
939 ret = bq25890_get_chip_version(bq);
941 dev_err(dev, "Cannot read chip ID or unknown chip.\n");
945 if (!dev->platform_data) {
946 ret = bq25890_fw_probe(bq);
948 dev_err(dev, "Cannot read device properties.\n");
955 ret = bq25890_hw_init(bq);
957 dev_err(dev, "Cannot initialize the chip.\n");
961 if (client->irq <= 0)
962 client->irq = bq25890_irq_probe(bq);
964 if (client->irq < 0) {
965 dev_err(dev, "No irq resource found.\n");
970 bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
971 if (!IS_ERR_OR_NULL(bq->usb_phy)) {
972 INIT_WORK(&bq->usb_work, bq25890_usb_work);
973 bq->usb_nb.notifier_call = bq25890_usb_notifier;
974 usb_register_notifier(bq->usb_phy, &bq->usb_nb);
977 ret = devm_request_threaded_irq(dev, client->irq, NULL,
978 bq25890_irq_handler_thread,
979 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
980 BQ25890_IRQ_PIN, bq);
984 ret = bq25890_power_supply_init(bq);
986 dev_err(dev, "Failed to register power supply\n");
993 if (!IS_ERR_OR_NULL(bq->usb_phy))
994 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
999 static int bq25890_remove(struct i2c_client *client)
1001 struct bq25890_device *bq = i2c_get_clientdata(client);
1003 power_supply_unregister(bq->charger);
1005 if (!IS_ERR_OR_NULL(bq->usb_phy))
1006 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
1008 /* reset all registers to default values */
1009 bq25890_chip_reset(bq);
1014 #ifdef CONFIG_PM_SLEEP
1015 static int bq25890_suspend(struct device *dev)
1017 struct bq25890_device *bq = dev_get_drvdata(dev);
1020 * If charger is removed, while in suspend, make sure ADC is diabled
1021 * since it consumes slightly more power.
1023 return bq25890_field_write(bq, F_CONV_RATE, 0);
1026 static int bq25890_resume(struct device *dev)
1029 struct bq25890_device *bq = dev_get_drvdata(dev);
1031 mutex_lock(&bq->lock);
1033 ret = bq25890_get_chip_state(bq, &bq->state);
1037 /* Re-enable ADC only if charger is plugged in. */
1038 if (bq->state.online) {
1039 ret = bq25890_field_write(bq, F_CONV_RATE, 1);
1044 /* signal userspace, maybe state changed while suspended */
1045 power_supply_changed(bq->charger);
1048 mutex_unlock(&bq->lock);
1054 static const struct dev_pm_ops bq25890_pm = {
1055 SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
1058 static const struct i2c_device_id bq25890_i2c_ids[] = {
1065 MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
1067 static const struct of_device_id bq25890_of_match[] = {
1068 { .compatible = "ti,bq25890", },
1069 { .compatible = "ti,bq25892", },
1070 { .compatible = "ti,bq25895", },
1071 { .compatible = "ti,bq25896", },
1074 MODULE_DEVICE_TABLE(of, bq25890_of_match);
1076 static const struct acpi_device_id bq25890_acpi_match[] = {
1080 MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
1082 static struct i2c_driver bq25890_driver = {
1084 .name = "bq25890-charger",
1085 .of_match_table = of_match_ptr(bq25890_of_match),
1086 .acpi_match_table = ACPI_PTR(bq25890_acpi_match),
1089 .probe = bq25890_probe,
1090 .remove = bq25890_remove,
1091 .id_table = bq25890_i2c_ids,
1093 module_i2c_driver(bq25890_driver);
1095 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
1096 MODULE_DESCRIPTION("bq25890 charger driver");
1097 MODULE_LICENSE("GPL");