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interconnect: qcom: Fix Kconfig indentation
[linux/fpc-iii.git] / drivers / power / supply / bq25890_charger.c
blob9d1ec8d677de61c5cde951b28be1f38dcf4a2455
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * TI BQ25890 charger driver
4 *
5 * Copyright (C) 2015 Intel Corporation
6 */
7
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 BQ25895_ID 7
26 #define BQ25896_ID 0
27
28 enum bq25890_fields {
29 F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
30 F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
31 F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
32 F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
33 F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN, /* Reg03 */
34 F_PUMPX_EN, F_ICHG, /* Reg04 */
35 F_IPRECHG, F_ITERM, /* Reg05 */
36 F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
37 F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
38 F_JEITA_ISET, /* Reg07 */
39 F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
40 F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
41 F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
42 F_BOOSTV, F_BOOSTI, /* Reg0A */
43 F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_VSYS_STAT, /* Reg0B */
44 F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
45 F_NTC_FAULT, /* Reg0C */
46 F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
47 F_THERM_STAT, F_BATV, /* Reg0E */
48 F_SYSV, /* Reg0F */
49 F_TSPCT, /* Reg10 */
50 F_VBUS_GD, F_VBUSV, /* Reg11 */
51 F_ICHGR, /* Reg12 */
52 F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
53 F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
54
55 F_MAX_FIELDS
56 };
57
58 /* initial field values, converted to register values */
59 struct bq25890_init_data {
60 u8 ichg; /* charge current */
61 u8 vreg; /* regulation voltage */
62 u8 iterm; /* termination current */
63 u8 iprechg; /* precharge current */
64 u8 sysvmin; /* minimum system voltage limit */
65 u8 boostv; /* boost regulation voltage */
66 u8 boosti; /* boost current limit */
67 u8 boostf; /* boost frequency */
68 u8 ilim_en; /* enable ILIM pin */
69 u8 treg; /* thermal regulation threshold */
70 };
71
72 struct bq25890_state {
73 u8 online;
74 u8 chrg_status;
75 u8 chrg_fault;
76 u8 vsys_status;
77 u8 boost_fault;
78 u8 bat_fault;
79 };
80
81 struct bq25890_device {
82 struct i2c_client *client;
83 struct device *dev;
84 struct power_supply *charger;
85
86 struct usb_phy *usb_phy;
87 struct notifier_block usb_nb;
88 struct work_struct usb_work;
89 unsigned long usb_event;
90
91 struct regmap *rmap;
92 struct regmap_field *rmap_fields[F_MAX_FIELDS];
93
94 int chip_id;
95 struct bq25890_init_data init_data;
96 struct bq25890_state state;
97
98 struct mutex lock; /* protect state data */
99 };
100
101 static const struct regmap_range bq25890_readonly_reg_ranges[] = {
102 regmap_reg_range(0x0b, 0x0c),
103 regmap_reg_range(0x0e, 0x13),
104 };
105
106 static const struct regmap_access_table bq25890_writeable_regs = {
107 .no_ranges = bq25890_readonly_reg_ranges,
108 .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
109 };
110
111 static const struct regmap_range bq25890_volatile_reg_ranges[] = {
112 regmap_reg_range(0x00, 0x00),
113 regmap_reg_range(0x09, 0x09),
114 regmap_reg_range(0x0b, 0x0c),
115 regmap_reg_range(0x0e, 0x14),
116 };
117
118 static const struct regmap_access_table bq25890_volatile_regs = {
119 .yes_ranges = bq25890_volatile_reg_ranges,
120 .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
121 };
122
123 static const struct regmap_config bq25890_regmap_config = {
124 .reg_bits = 8,
125 .val_bits = 8,
126
127 .max_register = 0x14,
128 .cache_type = REGCACHE_RBTREE,
129
130 .wr_table = &bq25890_writeable_regs,
131 .volatile_table = &bq25890_volatile_regs,
132 };
133
134 static const struct reg_field bq25890_reg_fields[] = {
135 /* REG00 */
136 [F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
137 [F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
138 [F_IILIM] = REG_FIELD(0x00, 0, 5),
139 /* REG01 */
140 [F_BHOT] = REG_FIELD(0x01, 6, 7),
141 [F_BCOLD] = REG_FIELD(0x01, 5, 5),
142 [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
143 /* REG02 */
144 [F_CONV_START] = REG_FIELD(0x02, 7, 7),
145 [F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
146 [F_BOOSTF] = REG_FIELD(0x02, 5, 5),
147 [F_ICO_EN] = REG_FIELD(0x02, 4, 4),
148 [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
149 [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
150 [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
151 [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
152 /* REG03 */
153 [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
154 [F_WD_RST] = REG_FIELD(0x03, 6, 6),
155 [F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
156 [F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
157 [F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
158 /* MIN_VBAT_SEL on BQ25896 */
159 /* REG04 */
160 [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
161 [F_ICHG] = REG_FIELD(0x04, 0, 6),
162 /* REG05 */
163 [F_IPRECHG] = REG_FIELD(0x05, 4, 7),
164 [F_ITERM] = REG_FIELD(0x05, 0, 3),
165 /* REG06 */
166 [F_VREG] = REG_FIELD(0x06, 2, 7),
167 [F_BATLOWV] = REG_FIELD(0x06, 1, 1),
168 [F_VRECHG] = REG_FIELD(0x06, 0, 0),
169 /* REG07 */
170 [F_TERM_EN] = REG_FIELD(0x07, 7, 7),
171 [F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
172 [F_WD] = REG_FIELD(0x07, 4, 5),
173 [F_TMR_EN] = REG_FIELD(0x07, 3, 3),
174 [F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
175 [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), // reserved on BQ25895
176 /* REG08 */
177 [F_BATCMP] = REG_FIELD(0x08, 5, 7),
178 [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
179 [F_TREG] = REG_FIELD(0x08, 0, 1),
180 /* REG09 */
181 [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
182 [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
183 [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
184 [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), // reserved on BQ25895
185 [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
186 [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
187 [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
188 [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
189 /* REG0A */
190 [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
191 /* PFM_OTG_DIS 3 on BQ25896 */
192 [F_BOOSTI] = REG_FIELD(0x0A, 0, 2), // reserved on BQ25895
193 /* REG0B */
194 [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
195 [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
196 [F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
197 [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
198 [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
199 /* REG0C */
200 [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
201 [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
202 [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
203 [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
204 [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
205 /* REG0D */
206 [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
207 [F_VINDPM] = REG_FIELD(0x0D, 0, 6),
208 /* REG0E */
209 [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
210 [F_BATV] = REG_FIELD(0x0E, 0, 6),
211 /* REG0F */
212 [F_SYSV] = REG_FIELD(0x0F, 0, 6),
213 /* REG10 */
214 [F_TSPCT] = REG_FIELD(0x10, 0, 6),
215 /* REG11 */
216 [F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
217 [F_VBUSV] = REG_FIELD(0x11, 0, 6),
218 /* REG12 */
219 [F_ICHGR] = REG_FIELD(0x12, 0, 6),
220 /* REG13 */
221 [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
222 [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
223 [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
224 /* REG14 */
225 [F_REG_RST] = REG_FIELD(0x14, 7, 7),
226 [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
227 [F_PN] = REG_FIELD(0x14, 3, 5),
228 [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
229 [F_DEV_REV] = REG_FIELD(0x14, 0, 1)
230 };
231
232 /*
233 * Most of the val -> idx conversions can be computed, given the minimum,
234 * maximum and the step between values. For the rest of conversions, we use
235 * lookup tables.
236 */
237 enum bq25890_table_ids {
238 /* range tables */
239 TBL_ICHG,
240 TBL_ITERM,
241 TBL_VREG,
242 TBL_BOOSTV,
243 TBL_SYSVMIN,
244
245 /* lookup tables */
246 TBL_TREG,
247 TBL_BOOSTI,
248 };
249
250 /* Thermal Regulation Threshold lookup table, in degrees Celsius */
251 static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
252
253 #define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
254
255 /* Boost mode current limit lookup table, in uA */
256 static const u32 bq25890_boosti_tbl[] = {
257 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
258 };
259
260 #define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
261
262 struct bq25890_range {
263 u32 min;
264 u32 max;
265 u32 step;
266 };
267
268 struct bq25890_lookup {
269 const u32 *tbl;
270 u32 size;
271 };
272
273 static const union {
274 struct bq25890_range rt;
275 struct bq25890_lookup lt;
276 } bq25890_tables[] = {
277 /* range tables */
278 [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
279 [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
280 [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
281 [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
282 [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
283
284 /* lookup tables */
285 [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
286 [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
287 };
288
289 static int bq25890_field_read(struct bq25890_device *bq,
290 enum bq25890_fields field_id)
291 {
292 int ret;
293 int val;
294
295 ret = regmap_field_read(bq->rmap_fields[field_id], &val);
296 if (ret < 0)
297 return ret;
298
299 return val;
300 }
301
302 static int bq25890_field_write(struct bq25890_device *bq,
303 enum bq25890_fields field_id, u8 val)
304 {
305 return regmap_field_write(bq->rmap_fields[field_id], val);
306 }
307
308 static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
309 {
310 u8 idx;
311
312 if (id >= TBL_TREG) {
313 const u32 *tbl = bq25890_tables[id].lt.tbl;
314 u32 tbl_size = bq25890_tables[id].lt.size;
315
316 for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
317 ;
318 } else {
319 const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
320 u8 rtbl_size;
321
322 rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
323
324 for (idx = 1;
325 idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
326 idx++)
327 ;
328 }
329
330 return idx - 1;
331 }
332
333 static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
334 {
335 const struct bq25890_range *rtbl;
336
337 /* lookup table? */
338 if (id >= TBL_TREG)
339 return bq25890_tables[id].lt.tbl[idx];
340
341 /* range table */
342 rtbl = &bq25890_tables[id].rt;
343
344 return (rtbl->min + idx * rtbl->step);
345 }
346
347 enum bq25890_status {
348 STATUS_NOT_CHARGING,
349 STATUS_PRE_CHARGING,
350 STATUS_FAST_CHARGING,
351 STATUS_TERMINATION_DONE,
352 };
353
354 enum bq25890_chrg_fault {
355 CHRG_FAULT_NORMAL,
356 CHRG_FAULT_INPUT,
357 CHRG_FAULT_THERMAL_SHUTDOWN,
358 CHRG_FAULT_TIMER_EXPIRED,
359 };
360
361 static int bq25890_power_supply_get_property(struct power_supply *psy,
362 enum power_supply_property psp,
363 union power_supply_propval *val)
364 {
365 int ret;
366 struct bq25890_device *bq = power_supply_get_drvdata(psy);
367 struct bq25890_state state;
368
369 mutex_lock(&bq->lock);
370 state = bq->state;
371 mutex_unlock(&bq->lock);
372
373 switch (psp) {
374 case POWER_SUPPLY_PROP_STATUS:
375 if (!state.online)
376 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
377 else if (state.chrg_status == STATUS_NOT_CHARGING)
378 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
379 else if (state.chrg_status == STATUS_PRE_CHARGING ||
380 state.chrg_status == STATUS_FAST_CHARGING)
381 val->intval = POWER_SUPPLY_STATUS_CHARGING;
382 else if (state.chrg_status == STATUS_TERMINATION_DONE)
383 val->intval = POWER_SUPPLY_STATUS_FULL;
384 else
385 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
386
387 break;
388
389 case POWER_SUPPLY_PROP_MANUFACTURER:
390 val->strval = BQ25890_MANUFACTURER;
391 break;
392
393 case POWER_SUPPLY_PROP_MODEL_NAME:
394 if (bq->chip_id == BQ25890_ID)
395 val->strval = "BQ25890";
396 else if (bq->chip_id == BQ25895_ID)
397 val->strval = "BQ25895";
398 else if (bq->chip_id == BQ25896_ID)
399 val->strval = "BQ25896";
400 else
401 val->strval = "UNKNOWN";
402
403 break;
404
405 case POWER_SUPPLY_PROP_ONLINE:
406 val->intval = state.online;
407 break;
408
409 case POWER_SUPPLY_PROP_HEALTH:
410 if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
411 val->intval = POWER_SUPPLY_HEALTH_GOOD;
412 else if (state.bat_fault)
413 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
414 else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
415 val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
416 else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
417 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
418 else
419 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
420 break;
421
422 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
423 ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
424 if (ret < 0)
425 return ret;
426
427 /* converted_val = ADC_val * 50mA (table 10.3.19) */
428 val->intval = ret * 50000;
429 break;
430
431 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
432 val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
433 break;
434
435 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
436 if (!state.online) {
437 val->intval = 0;
438 break;
439 }
440
441 ret = bq25890_field_read(bq, F_BATV); /* read measured value */
442 if (ret < 0)
443 return ret;
444
445 /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
446 val->intval = 2304000 + ret * 20000;
447 break;
448
449 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
450 val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
451 break;
452
453 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
454 val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
455 break;
456
457 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
458 ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
459 if (ret < 0)
460 return ret;
461
462 /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
463 val->intval = 2304000 + ret * 20000;
464 break;
465
466 default:
467 return -EINVAL;
468 }
469
470 return 0;
471 }
472
473 static int bq25890_get_chip_state(struct bq25890_device *bq,
474 struct bq25890_state *state)
475 {
476 int i, ret;
477
478 struct {
479 enum bq25890_fields id;
480 u8 *data;
481 } state_fields[] = {
482 {F_CHG_STAT, &state->chrg_status},
483 {F_PG_STAT, &state->online},
484 {F_VSYS_STAT, &state->vsys_status},
485 {F_BOOST_FAULT, &state->boost_fault},
486 {F_BAT_FAULT, &state->bat_fault},
487 {F_CHG_FAULT, &state->chrg_fault}
488 };
489
490 for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
491 ret = bq25890_field_read(bq, state_fields[i].id);
492 if (ret < 0)
493 return ret;
494
495 *state_fields[i].data = ret;
496 }
497
498 dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n",
499 state->chrg_status, state->online, state->vsys_status,
500 state->chrg_fault, state->boost_fault, state->bat_fault);
501
502 return 0;
503 }
504
505 static bool bq25890_state_changed(struct bq25890_device *bq,
506 struct bq25890_state *new_state)
507 {
508 struct bq25890_state old_state;
509
510 mutex_lock(&bq->lock);
511 old_state = bq->state;
512 mutex_unlock(&bq->lock);
513
514 return (old_state.chrg_status != new_state->chrg_status ||
515 old_state.chrg_fault != new_state->chrg_fault ||
516 old_state.online != new_state->online ||
517 old_state.bat_fault != new_state->bat_fault ||
518 old_state.boost_fault != new_state->boost_fault ||
519 old_state.vsys_status != new_state->vsys_status);
520 }
521
522 static void bq25890_handle_state_change(struct bq25890_device *bq,
523 struct bq25890_state *new_state)
524 {
525 int ret;
526 struct bq25890_state old_state;
527
528 mutex_lock(&bq->lock);
529 old_state = bq->state;
530 mutex_unlock(&bq->lock);
531
532 if (!new_state->online) { /* power removed */
533 /* disable ADC */
534 ret = bq25890_field_write(bq, F_CONV_START, 0);
535 if (ret < 0)
536 goto error;
537 } else if (!old_state.online) { /* power inserted */
538 /* enable ADC, to have control of charge current/voltage */
539 ret = bq25890_field_write(bq, F_CONV_START, 1);
540 if (ret < 0)
541 goto error;
542 }
543
544 return;
545
546 error:
547 dev_err(bq->dev, "Error communicating with the chip.\n");
548 }
549
550 static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
551 {
552 struct bq25890_device *bq = private;
553 int ret;
554 struct bq25890_state state;
555
556 ret = bq25890_get_chip_state(bq, &state);
557 if (ret < 0)
558 goto handled;
559
560 if (!bq25890_state_changed(bq, &state))
561 goto handled;
562
563 bq25890_handle_state_change(bq, &state);
564
565 mutex_lock(&bq->lock);
566 bq->state = state;
567 mutex_unlock(&bq->lock);
568
569 power_supply_changed(bq->charger);
570
571 handled:
572 return IRQ_HANDLED;
573 }
574
575 static int bq25890_chip_reset(struct bq25890_device *bq)
576 {
577 int ret;
578 int rst_check_counter = 10;
579
580 ret = bq25890_field_write(bq, F_REG_RST, 1);
581 if (ret < 0)
582 return ret;
583
584 do {
585 ret = bq25890_field_read(bq, F_REG_RST);
586 if (ret < 0)
587 return ret;
588
589 usleep_range(5, 10);
590 } while (ret == 1 && --rst_check_counter);
591
592 if (!rst_check_counter)
593 return -ETIMEDOUT;
594
595 return 0;
596 }
597
598 static int bq25890_hw_init(struct bq25890_device *bq)
599 {
600 int ret;
601 int i;
602 struct bq25890_state state;
603
604 const struct {
605 enum bq25890_fields id;
606 u32 value;
607 } init_data[] = {
608 {F_ICHG, bq->init_data.ichg},
609 {F_VREG, bq->init_data.vreg},
610 {F_ITERM, bq->init_data.iterm},
611 {F_IPRECHG, bq->init_data.iprechg},
612 {F_SYSVMIN, bq->init_data.sysvmin},
613 {F_BOOSTV, bq->init_data.boostv},
614 {F_BOOSTI, bq->init_data.boosti},
615 {F_BOOSTF, bq->init_data.boostf},
616 {F_EN_ILIM, bq->init_data.ilim_en},
617 {F_TREG, bq->init_data.treg}
618 };
619
620 ret = bq25890_chip_reset(bq);
621 if (ret < 0) {
622 dev_dbg(bq->dev, "Reset failed %d\n", ret);
623 return ret;
624 }
625
626 /* disable watchdog */
627 ret = bq25890_field_write(bq, F_WD, 0);
628 if (ret < 0) {
629 dev_dbg(bq->dev, "Disabling watchdog failed %d\n", ret);
630 return ret;
631 }
632
633 /* initialize currents/voltages and other parameters */
634 for (i = 0; i < ARRAY_SIZE(init_data); i++) {
635 ret = bq25890_field_write(bq, init_data[i].id,
636 init_data[i].value);
637 if (ret < 0) {
638 dev_dbg(bq->dev, "Writing init data failed %d\n", ret);
639 return ret;
640 }
641 }
642
643 /* Configure ADC for continuous conversions. This does not enable it. */
644 ret = bq25890_field_write(bq, F_CONV_RATE, 1);
645 if (ret < 0) {
646 dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
647 return ret;
648 }
649
650 ret = bq25890_get_chip_state(bq, &state);
651 if (ret < 0) {
652 dev_dbg(bq->dev, "Get state failed %d\n", ret);
653 return ret;
654 }
655
656 mutex_lock(&bq->lock);
657 bq->state = state;
658 mutex_unlock(&bq->lock);
659
660 return 0;
661 }
662
663 static enum power_supply_property bq25890_power_supply_props[] = {
664 POWER_SUPPLY_PROP_MANUFACTURER,
665 POWER_SUPPLY_PROP_MODEL_NAME,
666 POWER_SUPPLY_PROP_STATUS,
667 POWER_SUPPLY_PROP_ONLINE,
668 POWER_SUPPLY_PROP_HEALTH,
669 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
670 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
671 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
672 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
673 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
674 POWER_SUPPLY_PROP_VOLTAGE_NOW,
675 };
676
677 static char *bq25890_charger_supplied_to[] = {
678 "main-battery",
679 };
680
681 static const struct power_supply_desc bq25890_power_supply_desc = {
682 .name = "bq25890-charger",
683 .type = POWER_SUPPLY_TYPE_USB,
684 .properties = bq25890_power_supply_props,
685 .num_properties = ARRAY_SIZE(bq25890_power_supply_props),
686 .get_property = bq25890_power_supply_get_property,
687 };
688
689 static int bq25890_power_supply_init(struct bq25890_device *bq)
690 {
691 struct power_supply_config psy_cfg = { .drv_data = bq, };
692
693 psy_cfg.supplied_to = bq25890_charger_supplied_to;
694 psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
695
696 bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc,
697 &psy_cfg);
698
699 return PTR_ERR_OR_ZERO(bq->charger);
700 }
701
702 static void bq25890_usb_work(struct work_struct *data)
703 {
704 int ret;
705 struct bq25890_device *bq =
706 container_of(data, struct bq25890_device, usb_work);
707
708 switch (bq->usb_event) {
709 case USB_EVENT_ID:
710 /* Enable boost mode */
711 ret = bq25890_field_write(bq, F_OTG_CFG, 1);
712 if (ret < 0)
713 goto error;
714 break;
715
716 case USB_EVENT_NONE:
717 /* Disable boost mode */
718 ret = bq25890_field_write(bq, F_OTG_CFG, 0);
719 if (ret < 0)
720 goto error;
721
722 power_supply_changed(bq->charger);
723 break;
724 }
725
726 return;
727
728 error:
729 dev_err(bq->dev, "Error switching to boost/charger mode.\n");
730 }
731
732 static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
733 void *priv)
734 {
735 struct bq25890_device *bq =
736 container_of(nb, struct bq25890_device, usb_nb);
737
738 bq->usb_event = val;
739 queue_work(system_power_efficient_wq, &bq->usb_work);
740
741 return NOTIFY_OK;
742 }
743
744 static int bq25890_irq_probe(struct bq25890_device *bq)
745 {
746 struct gpio_desc *irq;
747
748 irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN);
749 if (IS_ERR(irq)) {
750 dev_err(bq->dev, "Could not probe irq pin.\n");
751 return PTR_ERR(irq);
752 }
753
754 return gpiod_to_irq(irq);
755 }
756
757 static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
758 {
759 int ret;
760 u32 property;
761 int i;
762 struct bq25890_init_data *init = &bq->init_data;
763 struct {
764 char *name;
765 bool optional;
766 enum bq25890_table_ids tbl_id;
767 u8 *conv_data; /* holds converted value from given property */
768 } props[] = {
769 /* required properties */
770 {"ti,charge-current", false, TBL_ICHG, &init->ichg},
771 {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
772 {"ti,termination-current", false, TBL_ITERM, &init->iterm},
773 {"ti,precharge-current", false, TBL_ITERM, &init->iprechg},
774 {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
775 {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv},
776 {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
777
778 /* optional properties */
779 {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
780 };
781
782 /* initialize data for optional properties */
783 init->treg = 3; /* 120 degrees Celsius */
784
785 for (i = 0; i < ARRAY_SIZE(props); i++) {
786 ret = device_property_read_u32(bq->dev, props[i].name,
787 &property);
788 if (ret < 0) {
789 if (props[i].optional)
790 continue;
791
792 dev_err(bq->dev, "Unable to read property %d %s\n", ret,
793 props[i].name);
794
795 return ret;
796 }
797
798 *props[i].conv_data = bq25890_find_idx(property,
799 props[i].tbl_id);
800 }
801
802 return 0;
803 }
804
805 static int bq25890_fw_probe(struct bq25890_device *bq)
806 {
807 int ret;
808 struct bq25890_init_data *init = &bq->init_data;
809
810 ret = bq25890_fw_read_u32_props(bq);
811 if (ret < 0)
812 return ret;
813
814 init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin");
815 init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq");
816
817 return 0;
818 }
819
820 static int bq25890_probe(struct i2c_client *client,
821 const struct i2c_device_id *id)
822 {
823 struct i2c_adapter *adapter = client->adapter;
824 struct device *dev = &client->dev;
825 struct bq25890_device *bq;
826 int ret;
827 int i;
828
829 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
830 dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
831 return -ENODEV;
832 }
833
834 bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
835 if (!bq)
836 return -ENOMEM;
837
838 bq->client = client;
839 bq->dev = dev;
840
841 mutex_init(&bq->lock);
842
843 bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
844 if (IS_ERR(bq->rmap)) {
845 dev_err(dev, "failed to allocate register map\n");
846 return PTR_ERR(bq->rmap);
847 }
848
849 for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) {
850 const struct reg_field *reg_fields = bq25890_reg_fields;
851
852 bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
853 reg_fields[i]);
854 if (IS_ERR(bq->rmap_fields[i])) {
855 dev_err(dev, "cannot allocate regmap field\n");
856 return PTR_ERR(bq->rmap_fields[i]);
857 }
858 }
859
860 i2c_set_clientdata(client, bq);
861
862 bq->chip_id = bq25890_field_read(bq, F_PN);
863 if (bq->chip_id < 0) {
864 dev_err(dev, "Cannot read chip ID.\n");
865 return bq->chip_id;
866 }
867
868 if ((bq->chip_id != BQ25890_ID) && (bq->chip_id != BQ25895_ID)
869 && (bq->chip_id != BQ25896_ID)) {
870 dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id);
871 return -ENODEV;
872 }
873
874 if (!dev->platform_data) {
875 ret = bq25890_fw_probe(bq);
876 if (ret < 0) {
877 dev_err(dev, "Cannot read device properties.\n");
878 return ret;
879 }
880 } else {
881 return -ENODEV;
882 }
883
884 ret = bq25890_hw_init(bq);
885 if (ret < 0) {
886 dev_err(dev, "Cannot initialize the chip.\n");
887 return ret;
888 }
889
890 if (client->irq <= 0)
891 client->irq = bq25890_irq_probe(bq);
892
893 if (client->irq < 0) {
894 dev_err(dev, "No irq resource found.\n");
895 return client->irq;
896 }
897
898 /* OTG reporting */
899 bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
900 if (!IS_ERR_OR_NULL(bq->usb_phy)) {
901 INIT_WORK(&bq->usb_work, bq25890_usb_work);
902 bq->usb_nb.notifier_call = bq25890_usb_notifier;
903 usb_register_notifier(bq->usb_phy, &bq->usb_nb);
904 }
905
906 ret = devm_request_threaded_irq(dev, client->irq, NULL,
907 bq25890_irq_handler_thread,
908 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
909 BQ25890_IRQ_PIN, bq);
910 if (ret)
911 goto irq_fail;
912
913 ret = bq25890_power_supply_init(bq);
914 if (ret < 0) {
915 dev_err(dev, "Failed to register power supply\n");
916 goto irq_fail;
917 }
918
919 return 0;
920
921 irq_fail:
922 if (!IS_ERR_OR_NULL(bq->usb_phy))
923 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
924
925 return ret;
926 }
927
928 static int bq25890_remove(struct i2c_client *client)
929 {
930 struct bq25890_device *bq = i2c_get_clientdata(client);
931
932 power_supply_unregister(bq->charger);
933
934 if (!IS_ERR_OR_NULL(bq->usb_phy))
935 usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
936
937 /* reset all registers to default values */
938 bq25890_chip_reset(bq);
939
940 return 0;
941 }
942
943 #ifdef CONFIG_PM_SLEEP
944 static int bq25890_suspend(struct device *dev)
945 {
946 struct bq25890_device *bq = dev_get_drvdata(dev);
947
948 /*
949 * If charger is removed, while in suspend, make sure ADC is diabled
950 * since it consumes slightly more power.
951 */
952 return bq25890_field_write(bq, F_CONV_START, 0);
953 }
954
955 static int bq25890_resume(struct device *dev)
956 {
957 int ret;
958 struct bq25890_state state;
959 struct bq25890_device *bq = dev_get_drvdata(dev);
960
961 ret = bq25890_get_chip_state(bq, &state);
962 if (ret < 0)
963 return ret;
964
965 mutex_lock(&bq->lock);
966 bq->state = state;
967 mutex_unlock(&bq->lock);
968
969 /* Re-enable ADC only if charger is plugged in. */
970 if (state.online) {
971 ret = bq25890_field_write(bq, F_CONV_START, 1);
972 if (ret < 0)
973 return ret;
974 }
975
976 /* signal userspace, maybe state changed while suspended */
977 power_supply_changed(bq->charger);
978
979 return 0;
980 }
981 #endif
982
983 static const struct dev_pm_ops bq25890_pm = {
984 SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
985 };
986
987 static const struct i2c_device_id bq25890_i2c_ids[] = {
988 { "bq25890", 0 },
989 {},
990 };
991 MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
992
993 static const struct of_device_id bq25890_of_match[] = {
994 { .compatible = "ti,bq25890", },
995 { },
996 };
997 MODULE_DEVICE_TABLE(of, bq25890_of_match);
998
999 static const struct acpi_device_id bq25890_acpi_match[] = {
1000 {"BQ258900", 0},
1001 {},
1002 };
1003 MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
1004
1005 static struct i2c_driver bq25890_driver = {
1006 .driver = {
1007 .name = "bq25890-charger",
1008 .of_match_table = of_match_ptr(bq25890_of_match),
1009 .acpi_match_table = ACPI_PTR(bq25890_acpi_match),
1010 .pm = &bq25890_pm,
1011 },
1012 .probe = bq25890_probe,
1013 .remove = bq25890_remove,
1014 .id_table = bq25890_i2c_ids,
1015 };
1016 module_i2c_driver(bq25890_driver);
1017
1018 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
1019 MODULE_DESCRIPTION("bq25890 charger driver");
1020 MODULE_LICENSE("GPL");
Linux with added FPC-III support