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8#include <linux/module.h>
9#include <linux/i2c.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>
17
18#include <linux/acpi.h>
19#include <linux/of.h>
20
21#define BQ25890_MANUFACTURER "Texas Instruments"
22#define BQ25890_IRQ_PIN "bq25890_irq"
23
24#define BQ25890_ID 3
25#define BQ25896_ID 0
26
27enum bq25890_fields {
28 F_EN_HIZ, F_EN_ILIM, F_IILIM,
29 F_BHOT, F_BCOLD, F_VINDPM_OFS,
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,
32 F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN,
33 F_PUMPX_EN, F_ICHG,
34 F_IPRECHG, F_ITERM,
35 F_VREG, F_BATLOWV, F_VRECHG,
36 F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
37 F_JEITA_ISET,
38 F_BATCMP, F_VCLAMP, F_TREG,
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,
41 F_BOOSTV, F_BOOSTI,
42 F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_VSYS_STAT,
43 F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
44 F_NTC_FAULT,
45 F_FORCE_VINDPM, F_VINDPM,
46 F_THERM_STAT, F_BATV,
47 F_SYSV,
48 F_TSPCT,
49 F_VBUS_GD, F_VBUSV,
50 F_ICHGR,
51 F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM,
52 F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV,
53
54 F_MAX_FIELDS
55};
56
57
58struct bq25890_init_data {
59 u8 ichg;
60 u8 vreg;
61 u8 iterm;
62 u8 iprechg;
63 u8 sysvmin;
64 u8 boostv;
65 u8 boosti;
66 u8 boostf;
67 u8 ilim_en;
68 u8 treg;
69};
70
71struct bq25890_state {
72 u8 online;
73 u8 chrg_status;
74 u8 chrg_fault;
75 u8 vsys_status;
76 u8 boost_fault;
77 u8 bat_fault;
78};
79
80struct bq25890_device {
81 struct i2c_client *client;
82 struct device *dev;
83 struct power_supply *charger;
84
85 struct usb_phy *usb_phy;
86 struct notifier_block usb_nb;
87 struct work_struct usb_work;
88 unsigned long usb_event;
89
90 struct regmap *rmap;
91 struct regmap_field *rmap_fields[F_MAX_FIELDS];
92
93 int chip_id;
94 struct bq25890_init_data init_data;
95 struct bq25890_state state;
96
97 struct mutex lock;
98};
99
100static const struct regmap_range bq25890_readonly_reg_ranges[] = {
101 regmap_reg_range(0x0b, 0x0c),
102 regmap_reg_range(0x0e, 0x13),
103};
104
105static 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),
108};
109
110static 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),
115};
116
117static 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),
120};
121
122static const struct regmap_config bq25890_regmap_config = {
123 .reg_bits = 8,
124 .val_bits = 8,
125
126 .max_register = 0x14,
127 .cache_type = REGCACHE_RBTREE,
128
129 .wr_table = &bq25890_writeable_regs,
130 .volatile_table = &bq25890_volatile_regs,
131};
132
133static const struct reg_field bq25890_reg_fields[] = {
134
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),
138
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),
142
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),
148 [F_MAXC_EN] = REG_FIELD(0x02, 2, 2),
149 [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
150 [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
151
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
158
159 [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
160 [F_ICHG] = REG_FIELD(0x04, 0, 6),
161
162 [F_IPRECHG] = REG_FIELD(0x05, 4, 7),
163 [F_ITERM] = REG_FIELD(0x05, 0, 3),
164
165 [F_VREG] = REG_FIELD(0x06, 2, 7),
166 [F_BATLOWV] = REG_FIELD(0x06, 1, 1),
167 [F_VRECHG] = REG_FIELD(0x06, 0, 0),
168
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),
175
176 [F_BATCMP] = REG_FIELD(0x08, 5, 7),
177 [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
178 [F_TREG] = REG_FIELD(0x08, 0, 1),
179
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),
188
189 [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
190
191 [F_BOOSTI] = REG_FIELD(0x0A, 0, 2),
192
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),
197 [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
198
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),
204
205 [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
206 [F_VINDPM] = REG_FIELD(0x0D, 0, 6),
207
208 [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
209 [F_BATV] = REG_FIELD(0x0E, 0, 6),
210
211 [F_SYSV] = REG_FIELD(0x0F, 0, 6),
212
213 [F_TSPCT] = REG_FIELD(0x10, 0, 6),
214
215 [F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
216 [F_VBUSV] = REG_FIELD(0x11, 0, 6),
217
218 [F_ICHGR] = REG_FIELD(0x12, 0, 6),
219
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),
223
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)
229};
230
231
232
233
234
235
236enum bq25890_table_ids {
237
238 TBL_ICHG,
239 TBL_ITERM,
240 TBL_VREG,
241 TBL_BOOSTV,
242 TBL_SYSVMIN,
243
244
245 TBL_TREG,
246 TBL_BOOSTI,
247};
248
249
250static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
251
252#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
253
254
255static const u32 bq25890_boosti_tbl[] = {
256 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
257};
258
259#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
260
261struct bq25890_range {
262 u32 min;
263 u32 max;
264 u32 step;
265};
266
267struct bq25890_lookup {
268 const u32 *tbl;
269 u32 size;
270};
271
272static const union {
273 struct bq25890_range rt;
274 struct bq25890_lookup lt;
275} bq25890_tables[] = {
276
277 [TBL_ICHG] = { .rt = {0, 5056000, 64000} },
278 [TBL_ITERM] = { .rt = {64000, 1024000, 64000} },
279 [TBL_VREG] = { .rt = {3840000, 4608000, 16000} },
280 [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} },
281 [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} },
282
283
284 [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
285 [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
286};
287
288static int bq25890_field_read(struct bq25890_device *bq,
289 enum bq25890_fields field_id)
290{
291 int ret;
292 int val;
293
294 ret = regmap_field_read(bq->rmap_fields[field_id], &val);
295 if (ret < 0)
296 return ret;
297
298 return val;
299}
300
301static int bq25890_field_write(struct bq25890_device *bq,
302 enum bq25890_fields field_id, u8 val)
303{
304 return regmap_field_write(bq->rmap_fields[field_id], val);
305}
306
307static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
308{
309 u8 idx;
310
311 if (id >= TBL_TREG) {
312 const u32 *tbl = bq25890_tables[id].lt.tbl;
313 u32 tbl_size = bq25890_tables[id].lt.size;
314
315 for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
316 ;
317 } else {
318 const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
319 u8 rtbl_size;
320
321 rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
322
323 for (idx = 1;
324 idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
325 idx++)
326 ;
327 }
328
329 return idx - 1;
330}
331
332static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
333{
334 const struct bq25890_range *rtbl;
335
336
337 if (id >= TBL_TREG)
338 return bq25890_tables[id].lt.tbl[idx];
339
340
341 rtbl = &bq25890_tables[id].rt;
342
343 return (rtbl->min + idx * rtbl->step);
344}
345
346enum bq25890_status {
347 STATUS_NOT_CHARGING,
348 STATUS_PRE_CHARGING,
349 STATUS_FAST_CHARGING,
350 STATUS_TERMINATION_DONE,
351};
352
353enum bq25890_chrg_fault {
354 CHRG_FAULT_NORMAL,
355 CHRG_FAULT_INPUT,
356 CHRG_FAULT_THERMAL_SHUTDOWN,
357 CHRG_FAULT_TIMER_EXPIRED,
358};
359
360static int bq25890_power_supply_get_property(struct power_supply *psy,
361 enum power_supply_property psp,
362 union power_supply_propval *val)
363{
364 int ret;
365 struct bq25890_device *bq = power_supply_get_drvdata(psy);
366 struct bq25890_state state;
367
368 mutex_lock(&bq->lock);
369 state = bq->state;
370 mutex_unlock(&bq->lock);
371
372 switch (psp) {
373 case POWER_SUPPLY_PROP_STATUS:
374 if (!state.online)
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;
383 else
384 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
385
386 break;
387
388 case POWER_SUPPLY_PROP_MANUFACTURER:
389 val->strval = BQ25890_MANUFACTURER;
390 break;
391
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";
397 else
398 val->strval = "UNKNOWN";
399
400 break;
401
402 case POWER_SUPPLY_PROP_ONLINE:
403 val->intval = state.online;
404 break;
405
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;
415 else
416 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
417 break;
418
419 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
420 ret = bq25890_field_read(bq, F_ICHGR);
421 if (ret < 0)
422 return ret;
423
424
425 val->intval = ret * 50000;
426 break;
427
428 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
429 val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
430 break;
431
432 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
433 if (!state.online) {
434 val->intval = 0;
435 break;
436 }
437
438 ret = bq25890_field_read(bq, F_BATV);
439 if (ret < 0)
440 return ret;
441
442
443 val->intval = 2304000 + ret * 20000;
444 break;
445
446 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
447 val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
448 break;
449
450 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
451 val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
452 break;
453
454 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
455 ret = bq25890_field_read(bq, F_SYSV);
456 if (ret < 0)
457 return ret;
458
459
460 val->intval = 2304000 + ret * 20000;
461 break;
462
463 default:
464 return -EINVAL;
465 }
466
467 return 0;
468}
469
470static int bq25890_get_chip_state(struct bq25890_device *bq,
471 struct bq25890_state *state)
472{
473 int i, ret;
474
475 struct {
476 enum bq25890_fields id;
477 u8 *data;
478 } state_fields[] = {
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}
485 };
486
487 for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
488 ret = bq25890_field_read(bq, state_fields[i].id);
489 if (ret < 0)
490 return ret;
491
492 *state_fields[i].data = ret;
493 }
494
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);
498
499 return 0;
500}
501
502static bool bq25890_state_changed(struct bq25890_device *bq,
503 struct bq25890_state *new_state)
504{
505 struct bq25890_state old_state;
506
507 mutex_lock(&bq->lock);
508 old_state = bq->state;
509 mutex_unlock(&bq->lock);
510
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);
517}
518
519static void bq25890_handle_state_change(struct bq25890_device *bq,
520 struct bq25890_state *new_state)
521{
522 int ret;
523 struct bq25890_state old_state;
524
525 mutex_lock(&bq->lock);
526 old_state = bq->state;
527 mutex_unlock(&bq->lock);
528
529 if (!new_state->online) {
530
531 ret = bq25890_field_write(bq, F_CONV_START, 0);
532 if (ret < 0)
533 goto error;
534 } else if (!old_state.online) {
535
536 ret = bq25890_field_write(bq, F_CONV_START, 1);
537 if (ret < 0)
538 goto error;
539 }
540
541 return;
542
543error:
544 dev_err(bq->dev, "Error communicating with the chip.\n");
545}
546
547static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
548{
549 struct bq25890_device *bq = private;
550 int ret;
551 struct bq25890_state state;
552
553 ret = bq25890_get_chip_state(bq, &state);
554 if (ret < 0)
555 goto handled;
556
557 if (!bq25890_state_changed(bq, &state))
558 goto handled;
559
560 bq25890_handle_state_change(bq, &state);
561
562 mutex_lock(&bq->lock);
563 bq->state = state;
564 mutex_unlock(&bq->lock);
565
566 power_supply_changed(bq->charger);
567
568handled:
569 return IRQ_HANDLED;
570}
571
572static int bq25890_chip_reset(struct bq25890_device *bq)
573{
574 int ret;
575 int rst_check_counter = 10;
576
577 ret = bq25890_field_write(bq, F_REG_RST, 1);
578 if (ret < 0)
579 return ret;
580
581 do {
582 ret = bq25890_field_read(bq, F_REG_RST);
583 if (ret < 0)
584 return ret;
585
586 usleep_range(5, 10);
587 } while (ret == 1 && --rst_check_counter);
588
589 if (!rst_check_counter)
590 return -ETIMEDOUT;
591
592 return 0;
593}
594
595static int bq25890_hw_init(struct bq25890_device *bq)
596{
597 int ret;
598 int i;
599 struct bq25890_state state;
600
601 const struct {
602 enum bq25890_fields id;
603 u32 value;
604 } init_data[] = {
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}
615 };
616
617 ret = bq25890_chip_reset(bq);
618 if (ret < 0) {
619 dev_dbg(bq->dev, "Reset failed %d\n", ret);
620 return ret;
621 }
622
623
624 ret = bq25890_field_write(bq, F_WD, 0);
625 if (ret < 0) {
626 dev_dbg(bq->dev, "Disabling watchdog failed %d\n", ret);
627 return ret;
628 }
629
630
631 for (i = 0; i < ARRAY_SIZE(init_data); i++) {
632 ret = bq25890_field_write(bq, init_data[i].id,
633 init_data[i].value);
634 if (ret < 0) {
635 dev_dbg(bq->dev, "Writing init data failed %d\n", ret);
636 return ret;
637 }
638 }
639
640
641 ret = bq25890_field_write(bq, F_CONV_RATE, 1);
642 if (ret < 0) {
643 dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
644 return ret;
645 }
646
647 ret = bq25890_get_chip_state(bq, &state);
648 if (ret < 0) {
649 dev_dbg(bq->dev, "Get state failed %d\n", ret);
650 return ret;
651 }
652
653 mutex_lock(&bq->lock);
654 bq->state = state;
655 mutex_unlock(&bq->lock);
656
657 return 0;
658}
659
660static 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,
672};
673
674static char *bq25890_charger_supplied_to[] = {
675 "main-battery",
676};
677
678static 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,
684};
685
686static int bq25890_power_supply_init(struct bq25890_device *bq)
687{
688 struct power_supply_config psy_cfg = { .drv_data = bq, };
689
690 psy_cfg.supplied_to = bq25890_charger_supplied_to;
691 psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
692
693 bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc,
694 &psy_cfg);
695
696 return PTR_ERR_OR_ZERO(bq->charger);
697}
698
699static void bq25890_usb_work(struct work_struct *data)
700{
701 int ret;
702 struct bq25890_device *bq =
703 container_of(data, struct bq25890_device, usb_work);
704
705 switch (bq->usb_event) {
706 case USB_EVENT_ID:
707
708 ret = bq25890_field_write(bq, F_OTG_CFG, 1);
709 if (ret < 0)
710 goto error;
711 break;
712
713 case USB_EVENT_NONE:
714
715 ret = bq25890_field_write(bq, F_OTG_CFG, 0);
716 if (ret < 0)
717 goto error;
718
719 power_supply_changed(bq->charger);
720 break;
721 }
722
723 return;
724
725error:
726 dev_err(bq->dev, "Error switching to boost/charger mode.\n");
727}
728
729static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
730 void *priv)
731{
732 struct bq25890_device *bq =
733 container_of(nb, struct bq25890_device, usb_nb);
734
735 bq->usb_event = val;
736 queue_work(system_power_efficient_wq, &bq->usb_work);
737
738 return NOTIFY_OK;
739}
740
741static int bq25890_irq_probe(struct bq25890_device *bq)
742{
743 struct gpio_desc *irq;
744
745 irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN);
746 if (IS_ERR(irq)) {
747 dev_err(bq->dev, "Could not probe irq pin.\n");
748 return PTR_ERR(irq);
749 }
750
751 return gpiod_to_irq(irq);
752}
753
754static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
755{
756 int ret;
757 u32 property;
758 int i;
759 struct bq25890_init_data *init = &bq->init_data;
760 struct {
761 char *name;
762 bool optional;
763 enum bq25890_table_ids tbl_id;
764 u8 *conv_data;
765 } props[] = {
766
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},
774
775
776 {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
777 };
778
779
780 init->treg = 3;
781
782 for (i = 0; i < ARRAY_SIZE(props); i++) {
783 ret = device_property_read_u32(bq->dev, props[i].name,
784 &property);
785 if (ret < 0) {
786 if (props[i].optional)
787 continue;
788
789 dev_err(bq->dev, "Unable to read property %d %s\n", ret,
790 props[i].name);
791
792 return ret;
793 }
794
795 *props[i].conv_data = bq25890_find_idx(property,
796 props[i].tbl_id);
797 }
798
799 return 0;
800}
801
802static int bq25890_fw_probe(struct bq25890_device *bq)
803{
804 int ret;
805 struct bq25890_init_data *init = &bq->init_data;
806
807 ret = bq25890_fw_read_u32_props(bq);
808 if (ret < 0)
809 return ret;
810
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");
813
814 return 0;
815}
816
817static int bq25890_probe(struct i2c_client *client,
818 const struct i2c_device_id *id)
819{
820 struct i2c_adapter *adapter = client->adapter;
821 struct device *dev = &client->dev;
822 struct bq25890_device *bq;
823 int ret;
824 int i;
825
826 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
827 dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
828 return -ENODEV;
829 }
830
831 bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
832 if (!bq)
833 return -ENOMEM;
834
835 bq->client = client;
836 bq->dev = dev;
837
838 mutex_init(&bq->lock);
839
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);
844 }
845
846 for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) {
847 const struct reg_field *reg_fields = bq25890_reg_fields;
848
849 bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
850 reg_fields[i]);
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]);
854 }
855 }
856
857 i2c_set_clientdata(client, bq);
858
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");
862 return bq->chip_id;
863 }
864
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);
867 return -ENODEV;
868 }
869
870 if (!dev->platform_data) {
871 ret = bq25890_fw_probe(bq);
872 if (ret < 0) {
873 dev_err(dev, "Cannot read device properties.\n");
874 return ret;
875 }
876 } else {
877 return -ENODEV;
878 }
879
880 ret = bq25890_hw_init(bq);
881 if (ret < 0) {
882 dev_err(dev, "Cannot initialize the chip.\n");
883 return ret;
884 }
885
886 if (client->irq <= 0)
887 client->irq = bq25890_irq_probe(bq);
888
889 if (client->irq < 0) {
890 dev_err(dev, "No irq resource found.\n");
891 return client->irq;
892 }
893
894
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);
900 }
901
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);
906 if (ret)
907 goto irq_fail;
908
909 ret = bq25890_power_supply_init(bq);
910 if (ret < 0) {
911 dev_err(dev, "Failed to register power supply\n");
912 goto irq_fail;
913 }
914
915 return 0;
916
917irq_fail:
918 if (!IS_ERR_OR_NULL(bq->usb_phy))
919 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
920
921 return ret;
922}
923
924static int bq25890_remove(struct i2c_client *client)
925{
926 struct bq25890_device *bq = i2c_get_clientdata(client);
927
928 power_supply_unregister(bq->charger);
929
930 if (!IS_ERR_OR_NULL(bq->usb_phy))
931 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
932
933
934 bq25890_chip_reset(bq);
935
936 return 0;
937}
938
939#ifdef CONFIG_PM_SLEEP
940static int bq25890_suspend(struct device *dev)
941{
942 struct bq25890_device *bq = dev_get_drvdata(dev);
943
944
945
946
947
948 return bq25890_field_write(bq, F_CONV_START, 0);
949}
950
951static int bq25890_resume(struct device *dev)
952{
953 int ret;
954 struct bq25890_state state;
955 struct bq25890_device *bq = dev_get_drvdata(dev);
956
957 ret = bq25890_get_chip_state(bq, &state);
958 if (ret < 0)
959 return ret;
960
961 mutex_lock(&bq->lock);
962 bq->state = state;
963 mutex_unlock(&bq->lock);
964
965
966 if (state.online) {
967 ret = bq25890_field_write(bq, F_CONV_START, 1);
968 if (ret < 0)
969 return ret;
970 }
971
972
973 power_supply_changed(bq->charger);
974
975 return 0;
976}
977#endif
978
979static const struct dev_pm_ops bq25890_pm = {
980 SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
981};
982
983static const struct i2c_device_id bq25890_i2c_ids[] = {
984 { "bq25890", 0 },
985 {},
986};
987MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
988
989static const struct of_device_id bq25890_of_match[] = {
990 { .compatible = "ti,bq25890", },
991 { },
992};
993MODULE_DEVICE_TABLE(of, bq25890_of_match);
994
995static const struct acpi_device_id bq25890_acpi_match[] = {
996 {"BQ258900", 0},
997 {},
998};
999MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
1000
1001static struct i2c_driver bq25890_driver = {
1002 .driver = {
1003 .name = "bq25890-charger",
1004 .of_match_table = of_match_ptr(bq25890_of_match),
1005 .acpi_match_table = ACPI_PTR(bq25890_acpi_match),
1006 .pm = &bq25890_pm,
1007 },
1008 .probe = bq25890_probe,
1009 .remove = bq25890_remove,
1010 .id_table = bq25890_i2c_ids,
1011};
1012module_i2c_driver(bq25890_driver);
1013
1014MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
1015MODULE_DESCRIPTION("bq25890 charger driver");
1016MODULE_LICENSE("GPL");
1017
