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 F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
29 F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
30 F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
31 F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
32 F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN, /* Reg03 */
33 F_PUMPX_EN, F_ICHG, /* Reg04 */
34 F_IPRECHG, F_ITERM, /* Reg05 */
35 F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
36 F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
37 F_JEITA_ISET, /* Reg07 */
38 F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
39 F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
40 F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
41 F_BOOSTV, F_BOOSTI, /* Reg0A */
42 F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_VSYS_STAT, /* Reg0B */
43 F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
44 F_NTC_FAULT, /* Reg0C */
45 F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
46 F_THERM_STAT, F_BATV, /* Reg0E */
49 F_VBUS_GD, F_VBUSV, /* Reg11 */
51 F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
52 F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
57 /* initial field values, converted to register values */
58 struct bq25890_init_data {
59 u8 ichg; /* charge current */
60 u8 vreg; /* regulation voltage */
61 u8 iterm; /* termination current */
62 u8 iprechg; /* precharge current */
63 u8 sysvmin; /* minimum system voltage limit */
64 u8 boostv; /* boost regulation voltage */
65 u8 boosti; /* boost current limit */
66 u8 boostf; /* boost frequency */
67 u8 ilim_en; /* enable ILIM pin */
68 u8 treg; /* thermal regulation threshold */
71 struct bq25890_state {
80 struct bq25890_device {
81 struct i2c_client *client;
83 struct power_supply *charger;
85 struct usb_phy *usb_phy;
86 struct notifier_block usb_nb;
87 struct work_struct usb_work;
88 unsigned long usb_event;
91 struct regmap_field *rmap_fields[F_MAX_FIELDS];
94 struct bq25890_init_data init_data;
95 struct bq25890_state state;
97 struct mutex lock; /* protect state data */
100 static const struct regmap_range bq25890_readonly_reg_ranges[] = {
101 regmap_reg_range(0x0b, 0x0c),
102 regmap_reg_range(0x0e, 0x13),
105 static const struct regmap_access_table bq25890_writeable_regs = {
106 .no_ranges = bq25890_readonly_reg_ranges,
107 .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
110 static const struct regmap_range bq25890_volatile_reg_ranges[] = {
111 regmap_reg_range(0x00, 0x00),
112 regmap_reg_range(0x09, 0x09),
113 regmap_reg_range(0x0b, 0x0c),
114 regmap_reg_range(0x0e, 0x14),
117 static const struct regmap_access_table bq25890_volatile_regs = {
118 .yes_ranges = bq25890_volatile_reg_ranges,
119 .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
122 static const struct regmap_config bq25890_regmap_config = {
126 .max_register = 0x14,
127 .cache_type = REGCACHE_RBTREE,
129 .wr_table = &bq25890_writeable_regs,
130 .volatile_table = &bq25890_volatile_regs,
133 static const struct reg_field bq25890_reg_fields[] = {
135 [F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
136 [F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
137 [F_IILIM] = REG_FIELD(0x00, 0, 5),
139 [F_BHOT] = REG_FIELD(0x01, 6, 7),
140 [F_BCOLD] = REG_FIELD(0x01, 5, 5),
141 [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
143 [F_CONV_START] = REG_FIELD(0x02, 7, 7),
144 [F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
145 [F_BOOSTF] = REG_FIELD(0x02, 5, 5),
146 [F_ICO_EN] = REG_FIELD(0x02, 4, 4),
147 [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
148 [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
149 [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
150 [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
152 [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
153 [F_WD_RST] = REG_FIELD(0x03, 6, 6),
154 [F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
155 [F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
156 [F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
157 /* MIN_VBAT_SEL on BQ25896 */
159 [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
160 [F_ICHG] = REG_FIELD(0x04, 0, 6),
162 [F_IPRECHG] = REG_FIELD(0x05, 4, 7),
163 [F_ITERM] = REG_FIELD(0x05, 0, 3),
165 [F_VREG] = REG_FIELD(0x06, 2, 7),
166 [F_BATLOWV] = REG_FIELD(0x06, 1, 1),
167 [F_VRECHG] = REG_FIELD(0x06, 0, 0),
169 [F_TERM_EN] = REG_FIELD(0x07, 7, 7),
170 [F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
171 [F_WD] = REG_FIELD(0x07, 4, 5),
172 [F_TMR_EN] = REG_FIELD(0x07, 3, 3),
173 [F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
174 [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0),
176 [F_BATCMP] = REG_FIELD(0x08, 5, 7),
177 [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
178 [F_TREG] = REG_FIELD(0x08, 0, 1),
180 [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
181 [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
182 [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
183 [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4),
184 [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
185 [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
186 [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
187 [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
189 [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
190 /* PFM_OTG_DIS 3 on BQ25896 */
191 [F_BOOSTI] = REG_FIELD(0x0A, 0, 2),
193 [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
194 [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
195 [F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
196 [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
197 [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
199 [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
200 [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
201 [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
202 [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
203 [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
205 [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
206 [F_VINDPM] = REG_FIELD(0x0D, 0, 6),
208 [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
209 [F_BATV] = REG_FIELD(0x0E, 0, 6),
211 [F_SYSV] = REG_FIELD(0x0F, 0, 6),
213 [F_TSPCT] = REG_FIELD(0x10, 0, 6),
215 [F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
216 [F_VBUSV] = REG_FIELD(0x11, 0, 6),
218 [F_ICHGR] = REG_FIELD(0x12, 0, 6),
220 [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
221 [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
222 [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
224 [F_REG_RST] = REG_FIELD(0x14, 7, 7),
225 [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
226 [F_PN] = REG_FIELD(0x14, 3, 5),
227 [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
228 [F_DEV_REV] = REG_FIELD(0x14, 0, 1)
232 * Most of the val -> idx conversions can be computed, given the minimum,
233 * maximum and the step between values. For the rest of conversions, we use
236 enum bq25890_table_ids {
249 /* Thermal Regulation Threshold lookup table, in degrees Celsius */
250 static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
252 #define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
254 /* Boost mode current limit lookup table, in uA */
255 static const u32 bq25890_boosti_tbl[] = {
256 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
259 #define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
261 struct bq25890_range {
267 struct bq25890_lookup {
273 struct bq25890_range rt;
274 struct bq25890_lookup lt;
275 } bq25890_tables[] = {
277 [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
278 [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
279 [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
280 [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
281 [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
284 [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
285 [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
288 static int bq25890_field_read(struct bq25890_device *bq,
289 enum bq25890_fields field_id)
294 ret = regmap_field_read(bq->rmap_fields[field_id], &val);
301 static int bq25890_field_write(struct bq25890_device *bq,
302 enum bq25890_fields field_id, u8 val)
304 return regmap_field_write(bq->rmap_fields[field_id], val);
307 static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
311 if (id >= TBL_TREG) {
312 const u32 *tbl = bq25890_tables[id].lt.tbl;
313 u32 tbl_size = bq25890_tables[id].lt.size;
315 for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
318 const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
321 rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
324 idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
332 static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
334 const struct bq25890_range *rtbl;
338 return bq25890_tables[id].lt.tbl[idx];
341 rtbl = &bq25890_tables[id].rt;
343 return (rtbl->min + idx * rtbl->step);
346 enum bq25890_status {
349 STATUS_FAST_CHARGING,
350 STATUS_TERMINATION_DONE,
353 enum bq25890_chrg_fault {
356 CHRG_FAULT_THERMAL_SHUTDOWN,
357 CHRG_FAULT_TIMER_EXPIRED,
360 static int bq25890_power_supply_get_property(struct power_supply *psy,
361 enum power_supply_property psp,
362 union power_supply_propval *val)
365 struct bq25890_device *bq = power_supply_get_drvdata(psy);
366 struct bq25890_state state;
368 mutex_lock(&bq->lock);
370 mutex_unlock(&bq->lock);
373 case POWER_SUPPLY_PROP_STATUS:
375 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
376 else if (state.chrg_status == STATUS_NOT_CHARGING)
377 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
378 else if (state.chrg_status == STATUS_PRE_CHARGING ||
379 state.chrg_status == STATUS_FAST_CHARGING)
380 val->intval = POWER_SUPPLY_STATUS_CHARGING;
381 else if (state.chrg_status == STATUS_TERMINATION_DONE)
382 val->intval = POWER_SUPPLY_STATUS_FULL;
384 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
388 case POWER_SUPPLY_PROP_MANUFACTURER:
389 val->strval = BQ25890_MANUFACTURER;
392 case POWER_SUPPLY_PROP_MODEL_NAME:
393 if (bq->chip_id == BQ25890_ID)
394 val->strval = "BQ25890";
395 else if (bq->chip_id == BQ25896_ID)
396 val->strval = "BQ25896";
398 val->strval = "UNKNOWN";
402 case POWER_SUPPLY_PROP_ONLINE:
403 val->intval = state.online;
406 case POWER_SUPPLY_PROP_HEALTH:
407 if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
408 val->intval = POWER_SUPPLY_HEALTH_GOOD;
409 else if (state.bat_fault)
410 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
411 else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
412 val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
413 else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
414 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
416 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
419 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
420 ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
424 /* converted_val = ADC_val * 50mA (table 10.3.19) */
425 val->intval = ret * 50000;
428 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
429 val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
432 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
438 ret = bq25890_field_read(bq, F_BATV); /* read measured value */
442 /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
443 val->intval = 2304000 + ret * 20000;
446 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
447 val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
450 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
451 val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
454 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
455 ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
459 /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
460 val->intval = 2304000 + ret * 20000;
470 static int bq25890_get_chip_state(struct bq25890_device *bq,
471 struct bq25890_state *state)
476 enum bq25890_fields id;
479 {F_CHG_STAT, &state->chrg_status},
480 {F_PG_STAT, &state->online},
481 {F_VSYS_STAT, &state->vsys_status},
482 {F_BOOST_FAULT, &state->boost_fault},
483 {F_BAT_FAULT, &state->bat_fault},
484 {F_CHG_FAULT, &state->chrg_fault}
487 for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
488 ret = bq25890_field_read(bq, state_fields[i].id);
492 *state_fields[i].data = ret;
495 dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n",
496 state->chrg_status, state->online, state->vsys_status,
497 state->chrg_fault, state->boost_fault, state->bat_fault);
502 static bool bq25890_state_changed(struct bq25890_device *bq,
503 struct bq25890_state *new_state)
505 struct bq25890_state old_state;
507 mutex_lock(&bq->lock);
508 old_state = bq->state;
509 mutex_unlock(&bq->lock);
511 return (old_state.chrg_status != new_state->chrg_status ||
512 old_state.chrg_fault != new_state->chrg_fault ||
513 old_state.online != new_state->online ||
514 old_state.bat_fault != new_state->bat_fault ||
515 old_state.boost_fault != new_state->boost_fault ||
516 old_state.vsys_status != new_state->vsys_status);
519 static void bq25890_handle_state_change(struct bq25890_device *bq,
520 struct bq25890_state *new_state)
523 struct bq25890_state old_state;
525 mutex_lock(&bq->lock);
526 old_state = bq->state;
527 mutex_unlock(&bq->lock);
529 if (!new_state->online) { /* power removed */
531 ret = bq25890_field_write(bq, F_CONV_START, 0);
534 } else if (!old_state.online) { /* power inserted */
535 /* enable ADC, to have control of charge current/voltage */
536 ret = bq25890_field_write(bq, F_CONV_START, 1);
544 dev_err(bq->dev, "Error communicating with the chip.\n");
547 static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
549 struct bq25890_device *bq = private;
551 struct bq25890_state state;
553 ret = bq25890_get_chip_state(bq, &state);
557 if (!bq25890_state_changed(bq, &state))
560 bq25890_handle_state_change(bq, &state);
562 mutex_lock(&bq->lock);
564 mutex_unlock(&bq->lock);
566 power_supply_changed(bq->charger);
572 static int bq25890_chip_reset(struct bq25890_device *bq)
575 int rst_check_counter = 10;
577 ret = bq25890_field_write(bq, F_REG_RST, 1);
582 ret = bq25890_field_read(bq, F_REG_RST);
587 } while (ret == 1 && --rst_check_counter);
589 if (!rst_check_counter)
595 static int bq25890_hw_init(struct bq25890_device *bq)
599 struct bq25890_state state;
602 enum bq25890_fields id;
605 {F_ICHG, bq->init_data.ichg},
606 {F_VREG, bq->init_data.vreg},
607 {F_ITERM, bq->init_data.iterm},
608 {F_IPRECHG, bq->init_data.iprechg},
609 {F_SYSVMIN, bq->init_data.sysvmin},
610 {F_BOOSTV, bq->init_data.boostv},
611 {F_BOOSTI, bq->init_data.boosti},
612 {F_BOOSTF, bq->init_data.boostf},
613 {F_EN_ILIM, bq->init_data.ilim_en},
614 {F_TREG, bq->init_data.treg}
617 ret = bq25890_chip_reset(bq);
619 dev_dbg(bq->dev, "Reset failed %d\n", ret);
623 /* disable watchdog */
624 ret = bq25890_field_write(bq, F_WD, 0);
626 dev_dbg(bq->dev, "Disabling watchdog failed %d\n", ret);
630 /* initialize currents/voltages and other parameters */
631 for (i = 0; i < ARRAY_SIZE(init_data); i++) {
632 ret = bq25890_field_write(bq, init_data[i].id,
635 dev_dbg(bq->dev, "Writing init data failed %d\n", ret);
640 /* Configure ADC for continuous conversions. This does not enable it. */
641 ret = bq25890_field_write(bq, F_CONV_RATE, 1);
643 dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
647 ret = bq25890_get_chip_state(bq, &state);
649 dev_dbg(bq->dev, "Get state failed %d\n", ret);
653 mutex_lock(&bq->lock);
655 mutex_unlock(&bq->lock);
660 static enum power_supply_property bq25890_power_supply_props[] = {
661 POWER_SUPPLY_PROP_MANUFACTURER,
662 POWER_SUPPLY_PROP_MODEL_NAME,
663 POWER_SUPPLY_PROP_STATUS,
664 POWER_SUPPLY_PROP_ONLINE,
665 POWER_SUPPLY_PROP_HEALTH,
666 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
667 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
668 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
669 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
670 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
671 POWER_SUPPLY_PROP_VOLTAGE_NOW,
674 static char *bq25890_charger_supplied_to[] = {
678 static const struct power_supply_desc bq25890_power_supply_desc = {
679 .name = "bq25890-charger",
680 .type = POWER_SUPPLY_TYPE_USB,
681 .properties = bq25890_power_supply_props,
682 .num_properties = ARRAY_SIZE(bq25890_power_supply_props),
683 .get_property = bq25890_power_supply_get_property,
686 static int bq25890_power_supply_init(struct bq25890_device *bq)
688 struct power_supply_config psy_cfg = { .drv_data = bq, };
690 psy_cfg.supplied_to = bq25890_charger_supplied_to;
691 psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
693 bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc,
696 return PTR_ERR_OR_ZERO(bq->charger);
699 static void bq25890_usb_work(struct work_struct *data)
702 struct bq25890_device *bq =
703 container_of(data, struct bq25890_device, usb_work);
705 switch (bq->usb_event) {
707 /* Enable boost mode */
708 ret = bq25890_field_write(bq, F_OTG_CFG, 1);
714 /* Disable boost mode */
715 ret = bq25890_field_write(bq, F_OTG_CFG, 0);
719 power_supply_changed(bq->charger);
726 dev_err(bq->dev, "Error switching to boost/charger mode.\n");
729 static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
732 struct bq25890_device *bq =
733 container_of(nb, struct bq25890_device, usb_nb);
736 queue_work(system_power_efficient_wq, &bq->usb_work);
741 static int bq25890_irq_probe(struct bq25890_device *bq)
743 struct gpio_desc *irq;
745 irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN);
747 dev_err(bq->dev, "Could not probe irq pin.\n");
751 return gpiod_to_irq(irq);
754 static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
759 struct bq25890_init_data *init = &bq->init_data;
763 enum bq25890_table_ids tbl_id;
764 u8 *conv_data; /* holds converted value from given property */
766 /* required properties */
767 {"ti,charge-current", false, TBL_ICHG, &init->ichg},
768 {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
769 {"ti,termination-current", false, TBL_ITERM, &init->iterm},
770 {"ti,precharge-current", false, TBL_ITERM, &init->iprechg},
771 {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
772 {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv},
773 {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
775 /* optional properties */
776 {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
779 /* initialize data for optional properties */
780 init->treg = 3; /* 120 degrees Celsius */
782 for (i = 0; i < ARRAY_SIZE(props); i++) {
783 ret = device_property_read_u32(bq->dev, props[i].name,
786 if (props[i].optional)
789 dev_err(bq->dev, "Unable to read property %d %s\n", ret,
795 *props[i].conv_data = bq25890_find_idx(property,
802 static int bq25890_fw_probe(struct bq25890_device *bq)
805 struct bq25890_init_data *init = &bq->init_data;
807 ret = bq25890_fw_read_u32_props(bq);
811 init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin");
812 init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq");
817 static int bq25890_probe(struct i2c_client *client,
818 const struct i2c_device_id *id)
820 struct i2c_adapter *adapter = client->adapter;
821 struct device *dev = &client->dev;
822 struct bq25890_device *bq;
826 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
827 dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
831 bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
838 mutex_init(&bq->lock);
840 bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
841 if (IS_ERR(bq->rmap)) {
842 dev_err(dev, "failed to allocate register map\n");
843 return PTR_ERR(bq->rmap);
846 for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) {
847 const struct reg_field *reg_fields = bq25890_reg_fields;
849 bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
851 if (IS_ERR(bq->rmap_fields[i])) {
852 dev_err(dev, "cannot allocate regmap field\n");
853 return PTR_ERR(bq->rmap_fields[i]);
857 i2c_set_clientdata(client, bq);
859 bq->chip_id = bq25890_field_read(bq, F_PN);
860 if (bq->chip_id < 0) {
861 dev_err(dev, "Cannot read chip ID.\n");
865 if ((bq->chip_id != BQ25890_ID) && (bq->chip_id != BQ25896_ID)) {
866 dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id);
870 if (!dev->platform_data) {
871 ret = bq25890_fw_probe(bq);
873 dev_err(dev, "Cannot read device properties.\n");
880 ret = bq25890_hw_init(bq);
882 dev_err(dev, "Cannot initialize the chip.\n");
886 if (client->irq <= 0)
887 client->irq = bq25890_irq_probe(bq);
889 if (client->irq < 0) {
890 dev_err(dev, "No irq resource found.\n");
895 bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
896 if (!IS_ERR_OR_NULL(bq->usb_phy)) {
897 INIT_WORK(&bq->usb_work, bq25890_usb_work);
898 bq->usb_nb.notifier_call = bq25890_usb_notifier;
899 usb_register_notifier(bq->usb_phy, &bq->usb_nb);
902 ret = devm_request_threaded_irq(dev, client->irq, NULL,
903 bq25890_irq_handler_thread,
904 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
905 BQ25890_IRQ_PIN, bq);
909 ret = bq25890_power_supply_init(bq);
911 dev_err(dev, "Failed to register power supply\n");
918 if (!IS_ERR_OR_NULL(bq->usb_phy))
919 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
924 static int bq25890_remove(struct i2c_client *client)
926 struct bq25890_device *bq = i2c_get_clientdata(client);
928 power_supply_unregister(bq->charger);
930 if (!IS_ERR_OR_NULL(bq->usb_phy))
931 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
933 /* reset all registers to default values */
934 bq25890_chip_reset(bq);
939 #ifdef CONFIG_PM_SLEEP
940 static int bq25890_suspend(struct device *dev)
942 struct bq25890_device *bq = dev_get_drvdata(dev);
945 * If charger is removed, while in suspend, make sure ADC is diabled
946 * since it consumes slightly more power.
948 return bq25890_field_write(bq, F_CONV_START, 0);
951 static int bq25890_resume(struct device *dev)
954 struct bq25890_state state;
955 struct bq25890_device *bq = dev_get_drvdata(dev);
957 ret = bq25890_get_chip_state(bq, &state);
961 mutex_lock(&bq->lock);
963 mutex_unlock(&bq->lock);
965 /* Re-enable ADC only if charger is plugged in. */
967 ret = bq25890_field_write(bq, F_CONV_START, 1);
972 /* signal userspace, maybe state changed while suspended */
973 power_supply_changed(bq->charger);
979 static const struct dev_pm_ops bq25890_pm = {
980 SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
983 static const struct i2c_device_id bq25890_i2c_ids[] = {
987 MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
989 static const struct of_device_id bq25890_of_match[] = {
990 { .compatible = "ti,bq25890", },
993 MODULE_DEVICE_TABLE(of, bq25890_of_match);
995 static const struct acpi_device_id bq25890_acpi_match[] = {
999 MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
1001 static struct i2c_driver bq25890_driver = {
1003 .name = "bq25890-charger",
1004 .of_match_table = of_match_ptr(bq25890_of_match),
1005 .acpi_match_table = ACPI_PTR(bq25890_acpi_match),
1008 .probe = bq25890_probe,
1009 .remove = bq25890_remove,
1010 .id_table = bq25890_i2c_ids,
1012 module_i2c_driver(bq25890_driver);
1014 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
1015 MODULE_DESCRIPTION("bq25890 charger driver");
1016 MODULE_LICENSE("GPL");