1
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5#include <linux/err.h>
6#include <linux/i2c.h>
7#include <linux/init.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/gpio/consumer.h>
11#include <linux/power_supply.h>
12#include <linux/regmap.h>
13#include <linux/types.h>
14
15#define BQ2515X_MANUFACTURER "Texas Instruments"
16
17#define BQ2515X_STAT0 0x00
18#define BQ2515X_STAT1 0x01
19#define BQ2515X_STAT2 0x02
20#define BQ2515X_FLAG0 0x03
21#define BQ2515X_FLAG1 0x04
22#define BQ2515X_FLAG2 0x05
23#define BQ2515X_FLAG3 0x06
24#define BQ2515X_MASK0 0x07
25#define BQ2515X_MASK1 0x08
26#define BQ2515X_MASK2 0x09
27#define BQ2515X_MASK3 0x0a
28#define BQ2515X_VBAT_CTRL 0x12
29#define BQ2515X_ICHG_CTRL 0x13
30#define BQ2515X_PCHRGCTRL 0x14
31#define BQ2515X_TERMCTRL 0x15
32#define BQ2515X_BUVLO 0x16
33#define BQ2515X_CHARGERCTRL0 0x17
34#define BQ2515X_CHARGERCTRL1 0x18
35#define BQ2515X_ILIMCTRL 0x19
36#define BQ2515X_LDOCTRL 0x1d
37#define BQ2515X_MRCTRL 0x30
38#define BQ2515X_ICCTRL0 0x35
39#define BQ2515X_ICCTRL1 0x36
40#define BQ2515X_ICCTRL2 0x37
41#define BQ2515X_ADCCTRL0 0x40
42#define BQ2515X_ADCCTRL1 0x41
43#define BQ2515X_ADC_VBAT_M 0x42
44#define BQ2515X_ADC_VBAT_L 0x43
45#define BQ2515X_ADC_TS_M 0x44
46#define BQ2515X_ADC_TS_L 0x45
47#define BQ2515X_ADC_ICHG_M 0x46
48#define BQ2515X_ADC_ICHG_L 0x47
49#define BQ2515X_ADC_ADCIN_M 0x48
50#define BQ2515X_ADC_ADCIN_L 0x49
51#define BQ2515X_ADC_VIN_M 0x4a
52#define BQ2515X_ADC_VIN_L 0x4b
53#define BQ2515X_ADC_PMID_M 0x4c
54#define BQ2515X_ADC_PMID_L 0x4d
55#define BQ2515X_ADC_IIN_M 0x4e
56#define BQ2515X_ADC_IIN_L 0x4f
57#define BQ2515X_ADC_COMP1_M 0x52
58#define BQ2515X_ADC_COMP1_L 0X53
59#define BQ2515X_ADC_COMP2_M 0X54
60#define BQ2515X_ADC_COMP2_L 0x55
61#define BQ2515X_ADC_COMP3_M 0x56
62#define BQ2515X_ADC_COMP3_L 0x57
63#define BQ2515X_ADC_READ_EN 0x58
64#define BQ2515X_TS_FASTCHGCTRL 0x61
65#define BQ2515X_TS_COLD 0x62
66#define BQ2515X_TS_COOL 0x63
67#define BQ2515X_TS_WARM 0x64
68#define BQ2515X_TS_HOT 0x65
69#define BQ2515X_DEVICE_ID 0x6f
70
71#define BQ2515X_DEFAULT_ICHG_UA 10000
72#define BQ25150_DEFAULT_ILIM_UA 100000
73#define BQ25155_DEFAULT_ILIM_UA 500000
74#define BQ2515X_DEFAULT_VBAT_REG_UV 4200000
75#define BQ2515X_DEFAULT_IPRECHARGE_UA 2500
76
77#define BQ2515X_DIVISOR 65536
78#define BQ2515X_VBAT_BASE_VOLT 3600000
79#define BQ2515X_VBAT_REG_MAX 4600000
80#define BQ2515X_VBAT_REG_MIN 3600000
81#define BQ2515X_VBAT_STEP_UV 10000
82#define BQ2515X_UV_FACTOR 1000000
83#define BQ2515X_VBAT_MULTIPLIER 6
84#define BQ2515X_ICHG_DIVISOR 52429
85#define BQ2515X_ICHG_CURR_STEP_THRESH_UA 318750
86#define BQ2515X_ICHG_MIN_UA 0
87#define BQ2515X_ICHG_MAX_UA 500000
88#define BQ2515X_ICHG_RNG_1B0_UA 1250
89#define BQ2515X_ICHG_RNG_1B1_UA 2500
90#define BQ2515X_VLOWV_SEL_1B0_UV 3000000
91#define BQ2515X_VLOWV_SEL_1B1_UV 2800000
92#define BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA 18750
93#define BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA 37500
94#define BQ2515X_TWAKE2_MIN_US 1700000
95#define BQ2515X_TWAKE2_MAX_US 2300000
96
97#define BQ2515X_ILIM_150MA 0x2
98#define BQ2515X_ILIM_MASK 0x7
99#define BQ2515X_ILIM_MIN 50000
100#define BQ2515X_ILIM_MAX 600000
101#define BQ2515X_HEALTH_MASK 0xf
102#define BQ2515X_ICHGRNG_MASK 0x80
103#define BQ2515X_STAT0_MASK 0x0f
104#define BQ2515X_STAT1_MASK 0x1f
105#define BQ2515X_PRECHARGE_MASK 0x1f
106
107#define BQ2515X_TS_HOT_STAT BIT(0)
108#define BQ2515X_TS_WARM_STAT BIT(1)
109#define BQ2515X_TS_COOL_STAT BIT(2)
110#define BQ2515X_TS_COLD_STAT BIT(3)
111#define BQ2515X_SAFETY_TIMER_EXP BIT(5)
112
113#define BQ2515X_EN_VBAT_READ BIT(3)
114#define BQ2515X_EN_ICHG_READ BIT(5)
115
116#define BQ2515X_VIN_GOOD BIT(0)
117#define BQ2515X_CHRG_DONE BIT(5)
118#define BQ2515X_CV_CHRG_MODE BIT(6)
119
120#define BQ2515X_VIN_OVP_FAULT_STAT BIT(7)
121
122#define BQ2515X_WATCHDOG_DISABLE BIT(4)
123
124#define BQ2515X_ICHARGE_RANGE BIT(7)
125
126#define BQ2515X_VLOWV_SEL BIT(5)
127
128#define BQ2515X_CHARGER_DISABLE BIT(0)
129
130#define BQ2515X_HWRESET_14S_WD BIT(1)
131
132static const int bq2515x_ilim_lvl_values[] = {
133 50000, 100000, 150000, 200000, 300000, 400000, 500000, 600000
134};
135
136
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138
139
140
141
142
143struct bq2515x_init_data {
144 int ilim;
145 int ichg;
146 int vbatreg;
147 int iprechg;
148};
149
150enum bq2515x_id {
151 BQ25150,
152 BQ25155,
153};
154
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171
172
173struct bq2515x_device {
174 struct power_supply *mains;
175 struct power_supply *battery;
176 struct regmap *regmap;
177 struct device *dev;
178
179 struct gpio_desc *reset_gpio;
180 struct gpio_desc *powerdown_gpio;
181 struct gpio_desc *ac_detect_gpio;
182 struct gpio_desc *ce_gpio;
183
184 char model_name[I2C_NAME_SIZE];
185 int device_id;
186 bool mains_online;
187
188 struct bq2515x_init_data init_data;
189};
190
191static const struct reg_default bq25150_reg_defaults[] = {
192 {BQ2515X_FLAG0, 0x0},
193 {BQ2515X_FLAG1, 0x0},
194 {BQ2515X_FLAG2, 0x0},
195 {BQ2515X_FLAG3, 0x0},
196 {BQ2515X_MASK0, 0x0},
197 {BQ2515X_MASK1, 0x0},
198 {BQ2515X_MASK2, 0x71},
199 {BQ2515X_MASK3, 0x0},
200 {BQ2515X_VBAT_CTRL, 0x3C},
201 {BQ2515X_ICHG_CTRL, 0x8},
202 {BQ2515X_PCHRGCTRL, 0x2},
203 {BQ2515X_TERMCTRL, 0x14},
204 {BQ2515X_BUVLO, 0x0},
205 {BQ2515X_CHARGERCTRL0, 0x82},
206 {BQ2515X_CHARGERCTRL1, 0x42},
207 {BQ2515X_ILIMCTRL, 0x1},
208 {BQ2515X_LDOCTRL, 0xB0},
209 {BQ2515X_MRCTRL, 0x2A},
210 {BQ2515X_ICCTRL0, 0x10},
211 {BQ2515X_ICCTRL1, 0x0},
212 {BQ2515X_ICCTRL2, 0x0},
213 {BQ2515X_ADCCTRL0, 0x2},
214 {BQ2515X_ADCCTRL1, 0x40},
215 {BQ2515X_ADC_COMP1_M, 0x23},
216 {BQ2515X_ADC_COMP1_L, 0x20},
217 {BQ2515X_ADC_COMP2_M, 0x38},
218 {BQ2515X_ADC_COMP2_L, 0x90},
219 {BQ2515X_ADC_COMP3_M, 0x0},
220 {BQ2515X_ADC_COMP3_L, 0x0},
221 {BQ2515X_ADC_READ_EN, 0x0},
222 {BQ2515X_TS_FASTCHGCTRL, 0x34},
223 {BQ2515X_TS_COLD, 0x7C},
224 {BQ2515X_TS_COOL, 0x6D},
225 {BQ2515X_TS_WARM, 0x38},
226 {BQ2515X_TS_HOT, 0x27},
227 {BQ2515X_DEVICE_ID, 0x20},
228};
229
230static const struct reg_default bq25155_reg_defaults[] = {
231 {BQ2515X_FLAG0, 0x0},
232 {BQ2515X_FLAG1, 0x0},
233 {BQ2515X_FLAG2, 0x0},
234 {BQ2515X_FLAG3, 0x0},
235 {BQ2515X_MASK0, 0x0},
236 {BQ2515X_MASK1, 0x0},
237 {BQ2515X_MASK2, 0x71},
238 {BQ2515X_MASK3, 0x0},
239 {BQ2515X_VBAT_CTRL, 0x3C},
240 {BQ2515X_ICHG_CTRL, 0x8},
241 {BQ2515X_PCHRGCTRL, 0x2},
242 {BQ2515X_TERMCTRL, 0x14},
243 {BQ2515X_BUVLO, 0x0},
244 {BQ2515X_CHARGERCTRL0, 0x82},
245 {BQ2515X_CHARGERCTRL1, 0xC2},
246 {BQ2515X_ILIMCTRL, 0x6},
247 {BQ2515X_LDOCTRL, 0xB0},
248 {BQ2515X_MRCTRL, 0x2A},
249 {BQ2515X_ICCTRL0, 0x10},
250 {BQ2515X_ICCTRL1, 0x0},
251 {BQ2515X_ICCTRL2, 0x40},
252 {BQ2515X_ADCCTRL0, 0x2},
253 {BQ2515X_ADCCTRL1, 0x40},
254 {BQ2515X_ADC_COMP1_M, 0x23},
255 {BQ2515X_ADC_COMP1_L, 0x20},
256 {BQ2515X_ADC_COMP2_M, 0x38},
257 {BQ2515X_ADC_COMP2_L, 0x90},
258 {BQ2515X_ADC_COMP3_M, 0x0},
259 {BQ2515X_ADC_COMP3_L, 0x0},
260 {BQ2515X_ADC_READ_EN, 0x0},
261 {BQ2515X_TS_FASTCHGCTRL, 0x34},
262 {BQ2515X_TS_COLD, 0x7C},
263 {BQ2515X_TS_COOL, 0x6D},
264 {BQ2515X_TS_WARM, 0x38},
265 {BQ2515X_TS_HOT, 0x27},
266 {BQ2515X_DEVICE_ID, 0x35},
267};
268
269static int bq2515x_wake_up(struct bq2515x_device *bq2515x)
270{
271 int ret;
272 int val;
273
274
275
276
277
278 ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val);
279 if (ret)
280 return ret;
281
282
283
284
285
286 gpiod_set_value_cansleep(bq2515x->powerdown_gpio, 0);
287
288 gpiod_set_value_cansleep(bq2515x->reset_gpio, 0);
289 usleep_range(BQ2515X_TWAKE2_MIN_US, BQ2515X_TWAKE2_MAX_US);
290 gpiod_set_value_cansleep(bq2515x->reset_gpio, 1);
291
292 return regmap_write(bq2515x->regmap, BQ2515X_ADC_READ_EN,
293 (BQ2515X_EN_VBAT_READ | BQ2515X_EN_ICHG_READ));
294}
295
296static int bq2515x_update_ps_status(struct bq2515x_device *bq2515x)
297{
298 bool dc = false;
299 unsigned int val;
300 int ret;
301
302 if (bq2515x->ac_detect_gpio)
303 val = gpiod_get_value_cansleep(bq2515x->ac_detect_gpio);
304 else {
305 ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val);
306 if (ret)
307 return ret;
308 }
309
310 dc = val & BQ2515X_VIN_GOOD;
311
312 ret = bq2515x->mains_online != dc;
313
314 bq2515x->mains_online = dc;
315
316 return ret;
317}
318
319static int bq2515x_disable_watchdog_timers(struct bq2515x_device *bq2515x)
320{
321 int ret;
322
323 ret = regmap_update_bits(bq2515x->regmap, BQ2515X_CHARGERCTRL0,
324 BQ2515X_WATCHDOG_DISABLE, BQ2515X_WATCHDOG_DISABLE);
325 if (ret)
326 return ret;
327
328 return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2,
329 BQ2515X_HWRESET_14S_WD, 0);
330}
331
332static int bq2515x_get_battery_voltage_now(struct bq2515x_device *bq2515x)
333{
334 int ret;
335 int vbat_msb;
336 int vbat_lsb;
337 uint32_t vbat_measurement;
338
339 if (!bq2515x->mains_online)
340 bq2515x_wake_up(bq2515x);
341
342 ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_M, &vbat_msb);
343 if (ret)
344 return ret;
345
346 ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_L, &vbat_lsb);
347 if (ret)
348 return ret;
349
350 vbat_measurement = (vbat_msb << 8) | vbat_lsb;
351
352 return vbat_measurement * (BQ2515X_UV_FACTOR / BQ2515X_DIVISOR) *
353 BQ2515X_VBAT_MULTIPLIER;
354}
355
356static int bq2515x_get_battery_current_now(struct bq2515x_device *bq2515x)
357{
358 int ret;
359 int ichg_msb;
360 int ichg_lsb;
361 uint32_t ichg_measurement;
362 u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
363 unsigned int ichg_reg_code, reg_code;
364 unsigned int icharge_range = 0, pchrgctrl;
365 unsigned int buvlo, vlowv_sel, vlowv = BQ2515X_VLOWV_SEL_1B0_UV;
366
367 if (!bq2515x->mains_online)
368 return -ENODATA;
369
370 ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_M, &ichg_msb);
371 if (ret)
372 return ret;
373
374 ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_L, &ichg_lsb);
375 if (ret)
376 return ret;
377
378 ichg_measurement = (ichg_msb << 8) | ichg_lsb;
379
380 ret = regmap_read(bq2515x->regmap, BQ2515X_BUVLO, &buvlo);
381 if (ret)
382 return ret;
383
384 vlowv_sel = buvlo & BQ2515X_VLOWV_SEL;
385
386 if (vlowv_sel)
387 vlowv = BQ2515X_VLOWV_SEL_1B1_UV;
388
389 if (bq2515x_get_battery_voltage_now(bq2515x) < vlowv) {
390 ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL,
391 &pchrgctrl);
392 if (ret)
393 return ret;
394
395 reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK;
396 } else {
397 ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL,
398 &ichg_reg_code);
399 if (ret)
400 return ret;
401
402 reg_code = ichg_reg_code;
403 }
404
405 ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
406 if (ret)
407 return ret;
408
409 icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
410
411 if (icharge_range)
412 ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
413
414 return reg_code * (ichg_multiplier * ichg_measurement /
415 BQ2515X_ICHG_DIVISOR);
416}
417
418static bool bq2515x_get_charge_disable(struct bq2515x_device *bq2515x)
419{
420 int ret;
421 int ce_pin;
422 int icctrl2;
423 int charger_disable;
424
425 ce_pin = gpiod_get_value_cansleep(bq2515x->ce_gpio);
426
427 ret = regmap_read(bq2515x->regmap, BQ2515X_ICCTRL2, &icctrl2);
428 if (ret)
429 return ret;
430
431 charger_disable = icctrl2 & BQ2515X_CHARGER_DISABLE;
432
433 if (charger_disable || ce_pin)
434 return true;
435
436 return false;
437}
438
439static int bq2515x_set_charge_disable(struct bq2515x_device *bq2515x, int val)
440{
441 gpiod_set_value_cansleep(bq2515x->ce_gpio, val);
442
443 return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2,
444 BQ2515X_CHARGER_DISABLE, val);
445}
446
447static int bq2515x_get_const_charge_current(struct bq2515x_device *bq2515x)
448{
449 int ret;
450 u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
451 unsigned int ichg_reg_code;
452 unsigned int pchrgctrl;
453 unsigned int icharge_range;
454
455 ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL, &ichg_reg_code);
456 if (ret)
457 return ret;
458
459 ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
460 if (ret)
461 return ret;
462
463 icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
464
465 if (icharge_range)
466 ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
467
468 return ichg_reg_code * ichg_multiplier;
469}
470
471static int bq2515x_set_const_charge_current(struct bq2515x_device *bq2515x,
472 int val)
473{
474 int ret;
475 unsigned int ichg_reg_code;
476 u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
477 unsigned int icharge_range = 0;
478
479 if (val > BQ2515X_ICHG_MAX_UA || val < BQ2515X_ICHG_MIN_UA)
480 return -EINVAL;
481
482 if (val > BQ2515X_ICHG_CURR_STEP_THRESH_UA) {
483 ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
484 icharge_range = BQ2515X_ICHARGE_RANGE;
485 }
486
487 bq2515x_set_charge_disable(bq2515x, 1);
488
489 ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL,
490 BQ2515X_ICHARGE_RANGE, icharge_range);
491 if (ret)
492 return ret;
493
494 ichg_reg_code = val / ichg_multiplier;
495
496 ret = regmap_write(bq2515x->regmap, BQ2515X_ICHG_CTRL, ichg_reg_code);
497 if (ret)
498 return ret;
499
500 return bq2515x_set_charge_disable(bq2515x, 0);
501}
502
503static int bq2515x_get_precharge_current(struct bq2515x_device *bq2515x)
504{
505 int ret;
506 unsigned int pchrgctrl;
507 unsigned int icharge_range;
508 u16 precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
509 unsigned int precharge_reg_code;
510
511 ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
512 if (ret)
513 return ret;
514
515 icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
516
517 if (icharge_range)
518 precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
519
520 precharge_reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK;
521
522 return precharge_reg_code * precharge_multiplier;
523}
524
525static int bq2515x_set_precharge_current(struct bq2515x_device *bq2515x,
526 int val)
527{
528 int ret;
529 unsigned int pchrgctrl;
530 unsigned int icharge_range;
531 unsigned int precharge_reg_code;
532 unsigned int precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
533 unsigned int precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA;
534
535 ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
536 if (ret)
537 return ret;
538
539 icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
540
541 if (icharge_range) {
542 precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA;
543 precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
544 } else {
545 precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA;
546 precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
547 }
548 if (val > precharge_max_ua || val < BQ2515X_ICHG_MIN_UA)
549 return -EINVAL;
550
551 precharge_reg_code = val / precharge_multiplier;
552
553 ret = bq2515x_set_charge_disable(bq2515x, 1);
554 if (ret)
555 return ret;
556
557 ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL,
558 BQ2515X_PRECHARGE_MASK, precharge_reg_code);
559 if (ret)
560 return ret;
561
562 return bq2515x_set_charge_disable(bq2515x, 0);
563}
564
565static int bq2515x_charging_status(struct bq2515x_device *bq2515x,
566 union power_supply_propval *val)
567{
568 bool status0_no_fault;
569 bool status1_no_fault;
570 bool ce_status;
571 bool charge_done;
572 unsigned int status;
573 int ret;
574
575 if (!bq2515x->mains_online) {
576 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
577 return 0;
578 }
579
580 ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &status);
581 if (ret)
582 return ret;
583
584
585
586
587
588
589 if (((status & BQ2515X_STAT0_MASK) == true) &
590 ((status & BQ2515X_CHRG_DONE) == false)) {
591 status0_no_fault = true;
592 charge_done = false;
593 } else if (status & BQ2515X_CHRG_DONE) {
594 charge_done = true;
595 status0_no_fault = false;
596 } else {
597 status0_no_fault = false;
598 charge_done = false;
599 }
600
601 ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &status);
602 if (ret)
603 return ret;
604
605
606
607
608 if ((status & BQ2515X_STAT1_MASK) == false)
609 status1_no_fault = true;
610 else
611 status1_no_fault = false;
612
613 ce_status = (!bq2515x_get_charge_disable(bq2515x));
614
615
616
617
618
619
620
621 if (status0_no_fault & status1_no_fault & ce_status)
622 val->intval = POWER_SUPPLY_STATUS_CHARGING;
623 else if (charge_done)
624 val->intval = POWER_SUPPLY_STATUS_FULL;
625 else if (!(status0_no_fault & status1_no_fault & ce_status))
626 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
627
628 return 0;
629}
630
631static int bq2515x_get_batt_reg(struct bq2515x_device *bq2515x)
632{
633 int vbat_reg_code;
634 int ret;
635
636 ret = regmap_read(bq2515x->regmap, BQ2515X_VBAT_CTRL, &vbat_reg_code);
637 if (ret)
638 return ret;
639
640 return BQ2515X_VBAT_BASE_VOLT + vbat_reg_code * BQ2515X_VBAT_STEP_UV;
641}
642
643static int bq2515x_set_batt_reg(struct bq2515x_device *bq2515x, int val)
644{
645 int vbat_reg_code;
646
647 if (val > BQ2515X_VBAT_REG_MAX || val < BQ2515X_VBAT_REG_MIN)
648 return -EINVAL;
649
650 vbat_reg_code = (val - BQ2515X_VBAT_BASE_VOLT) / BQ2515X_VBAT_STEP_UV;
651
652 return regmap_write(bq2515x->regmap, BQ2515X_VBAT_CTRL, vbat_reg_code);
653}
654
655static int bq2515x_get_ilim_lvl(struct bq2515x_device *bq2515x)
656{
657 int ret;
658 int ilimctrl;
659
660 ret = regmap_read(bq2515x->regmap, BQ2515X_ILIMCTRL, &ilimctrl);
661 if (ret)
662 return ret;
663
664 return bq2515x_ilim_lvl_values[ilimctrl & BQ2515X_ILIM_MASK];
665}
666
667static int bq2515x_set_ilim_lvl(struct bq2515x_device *bq2515x, int val)
668{
669 int i = 0;
670 unsigned int array_size = ARRAY_SIZE(bq2515x_ilim_lvl_values);
671
672 for (i = array_size - 1; i > 0; i--) {
673 if (val >= bq2515x_ilim_lvl_values[i])
674 break;
675 }
676 return regmap_write(bq2515x->regmap, BQ2515X_ILIMCTRL, i);
677}
678
679static int bq2515x_power_supply_property_is_writeable(struct power_supply *psy,
680 enum power_supply_property prop)
681{
682 switch (prop) {
683 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
684 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
685 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
686 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
687 return true;
688 default:
689 return false;
690 }
691}
692
693static int bq2515x_charger_get_health(struct bq2515x_device *bq2515x,
694 union power_supply_propval *val)
695{
696 int health = POWER_SUPPLY_HEALTH_GOOD;
697 int ret;
698 unsigned int stat1;
699 unsigned int flag3;
700
701 if (!bq2515x->mains_online)
702 bq2515x_wake_up(bq2515x);
703
704 ret = regmap_read(bq2515x->regmap, BQ2515X_FLAG3, &flag3);
705 if (ret)
706 return ret;
707
708 ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &stat1);
709 if (ret)
710 return ret;
711
712 if (stat1 & BQ2515X_HEALTH_MASK) {
713 switch (stat1 & BQ2515X_HEALTH_MASK) {
714 case BQ2515X_TS_HOT_STAT:
715 health = POWER_SUPPLY_HEALTH_HOT;
716 break;
717 case BQ2515X_TS_WARM_STAT:
718 health = POWER_SUPPLY_HEALTH_WARM;
719 break;
720 case BQ2515X_TS_COOL_STAT:
721 health = POWER_SUPPLY_HEALTH_COOL;
722 break;
723 case BQ2515X_TS_COLD_STAT:
724 health = POWER_SUPPLY_HEALTH_COLD;
725 break;
726 default:
727 health = POWER_SUPPLY_HEALTH_UNKNOWN;
728 break;
729 }
730 }
731
732 if (stat1 & BQ2515X_VIN_OVP_FAULT_STAT)
733 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
734
735 if (flag3 & BQ2515X_SAFETY_TIMER_EXP)
736 health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
737
738 val->intval = health;
739 return 0;
740}
741
742static int bq2515x_mains_set_property(struct power_supply *psy,
743 enum power_supply_property prop,
744 const union power_supply_propval *val)
745{
746 struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
747 int ret;
748
749 switch (prop) {
750 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
751 ret = bq2515x_set_batt_reg(bq2515x, val->intval);
752 break;
753
754 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
755 ret = bq2515x_set_const_charge_current(bq2515x, val->intval);
756 break;
757
758 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
759 ret = bq2515x_set_ilim_lvl(bq2515x, val->intval);
760 break;
761
762 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
763 ret = bq2515x_set_precharge_current(bq2515x, val->intval);
764 break;
765
766 default:
767 return -EINVAL;
768 }
769
770 return ret;
771}
772
773static int bq2515x_mains_get_property(struct power_supply *psy,
774 enum power_supply_property prop,
775 union power_supply_propval *val)
776{
777 struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
778 int ret = 0;
779
780 switch (prop) {
781
782 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
783 ret = bq2515x_get_const_charge_current(bq2515x);
784 if (ret < 0)
785 return ret;
786
787 val->intval = ret;
788 break;
789
790 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
791 ret = bq2515x_get_batt_reg(bq2515x);
792 if (ret < 0)
793 return ret;
794 val->intval = ret;
795 break;
796
797 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
798 ret = bq2515x_get_precharge_current(bq2515x);
799 if (ret < 0)
800 return ret;
801 val->intval = ret;
802 break;
803
804 case POWER_SUPPLY_PROP_ONLINE:
805 val->intval = bq2515x->mains_online;
806 break;
807
808 case POWER_SUPPLY_PROP_HEALTH:
809 ret = bq2515x_charger_get_health(bq2515x, val);
810 if (ret)
811 val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
812 break;
813
814 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
815 ret = bq2515x_get_ilim_lvl(bq2515x);
816 if (ret < 0)
817 return ret;
818 val->intval = ret;
819 break;
820
821 case POWER_SUPPLY_PROP_MODEL_NAME:
822 val->strval = bq2515x->model_name;
823 break;
824
825 case POWER_SUPPLY_PROP_MANUFACTURER:
826 val->strval = BQ2515X_MANUFACTURER;
827 break;
828
829 case POWER_SUPPLY_PROP_STATUS:
830 ret = bq2515x_charging_status(bq2515x, val);
831 if (ret)
832 return ret;
833 break;
834
835 default:
836 return -EINVAL;
837 }
838
839 return ret;
840}
841
842static int bq2515x_battery_get_property(struct power_supply *psy,
843 enum power_supply_property prop,
844 union power_supply_propval *val)
845{
846 struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
847 int ret;
848
849 ret = bq2515x_update_ps_status(bq2515x);
850 if (ret)
851 return ret;
852
853 switch (prop) {
854
855 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
856 ret = bq2515x->init_data.vbatreg;
857 if (ret < 0)
858 return ret;
859 val->intval = ret;
860 break;
861
862 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
863 ret = bq2515x->init_data.ichg;
864 if (ret < 0)
865 return ret;
866 val->intval = ret;
867 break;
868
869 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
870 ret = bq2515x_get_battery_voltage_now(bq2515x);
871 if (ret < 0)
872 return ret;
873 val->intval = ret;
874 break;
875
876 case POWER_SUPPLY_PROP_CURRENT_NOW:
877 ret = bq2515x_get_battery_current_now(bq2515x);
878 if (ret < 0)
879 return ret;
880 val->intval = ret;
881 break;
882
883 default:
884 return -EINVAL;
885 }
886 return 0;
887}
888
889static const enum power_supply_property bq2515x_battery_properties[] = {
890 POWER_SUPPLY_PROP_VOLTAGE_NOW,
891 POWER_SUPPLY_PROP_CURRENT_NOW,
892 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
893 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
894};
895
896static const enum power_supply_property bq2515x_mains_properties[] = {
897 POWER_SUPPLY_PROP_ONLINE,
898 POWER_SUPPLY_PROP_STATUS,
899 POWER_SUPPLY_PROP_HEALTH,
900 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
901 POWER_SUPPLY_PROP_MODEL_NAME,
902 POWER_SUPPLY_PROP_MANUFACTURER,
903 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
904 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
905 POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
906};
907
908static const struct power_supply_desc bq2515x_mains_desc = {
909 .name = "bq2515x-mains",
910 .type = POWER_SUPPLY_TYPE_MAINS,
911 .get_property = bq2515x_mains_get_property,
912 .set_property = bq2515x_mains_set_property,
913 .properties = bq2515x_mains_properties,
914 .num_properties = ARRAY_SIZE(bq2515x_mains_properties),
915 .property_is_writeable = bq2515x_power_supply_property_is_writeable,
916};
917
918static const struct power_supply_desc bq2515x_battery_desc = {
919 .name = "bq2515x-battery",
920 .type = POWER_SUPPLY_TYPE_BATTERY,
921 .get_property = bq2515x_battery_get_property,
922 .properties = bq2515x_battery_properties,
923 .num_properties = ARRAY_SIZE(bq2515x_battery_properties),
924 .property_is_writeable = bq2515x_power_supply_property_is_writeable,
925};
926
927static int bq2515x_power_supply_register(struct bq2515x_device *bq2515x,
928 struct device *dev, struct power_supply_config psy_cfg)
929{
930 bq2515x->mains = devm_power_supply_register(bq2515x->dev,
931 &bq2515x_mains_desc,
932 &psy_cfg);
933 if (IS_ERR(bq2515x->mains))
934 return -EINVAL;
935
936 bq2515x->battery = devm_power_supply_register(bq2515x->dev,
937 &bq2515x_battery_desc,
938 &psy_cfg);
939 if (IS_ERR(bq2515x->battery))
940 return -EINVAL;
941
942 return 0;
943}
944
945static int bq2515x_hw_init(struct bq2515x_device *bq2515x)
946{
947 int ret;
948 struct power_supply_battery_info bat_info = { };
949
950 ret = bq2515x_disable_watchdog_timers(bq2515x);
951 if (ret)
952 return ret;
953
954 if (bq2515x->init_data.ilim) {
955 ret = bq2515x_set_ilim_lvl(bq2515x, bq2515x->init_data.ilim);
956 if (ret)
957 return ret;
958 }
959
960 ret = power_supply_get_battery_info(bq2515x->mains, &bat_info);
961 if (ret) {
962 dev_warn(bq2515x->dev, "battery info missing, default values will be applied\n");
963
964 bq2515x->init_data.ichg = BQ2515X_DEFAULT_ICHG_UA;
965
966 bq2515x->init_data.vbatreg = BQ2515X_DEFAULT_VBAT_REG_UV;
967
968 bq2515x->init_data.iprechg = BQ2515X_DEFAULT_IPRECHARGE_UA;
969
970 } else {
971 bq2515x->init_data.ichg =
972 bat_info.constant_charge_current_max_ua;
973
974 bq2515x->init_data.vbatreg =
975 bat_info.constant_charge_voltage_max_uv;
976
977 bq2515x->init_data.iprechg =
978 bat_info.precharge_current_ua;
979 }
980
981 ret = bq2515x_set_const_charge_current(bq2515x,
982 bq2515x->init_data.ichg);
983 if (ret)
984 return ret;
985
986 ret = bq2515x_set_batt_reg(bq2515x, bq2515x->init_data.vbatreg);
987 if (ret)
988 return ret;
989
990 return bq2515x_set_precharge_current(bq2515x,
991 bq2515x->init_data.iprechg);
992}
993
994static int bq2515x_read_properties(struct bq2515x_device *bq2515x)
995{
996 int ret;
997
998 ret = device_property_read_u32(bq2515x->dev,
999 "input-current-limit-microamp",
1000 &bq2515x->init_data.ilim);
1001 if (ret) {
1002 switch (bq2515x->device_id) {
1003 case BQ25150:
1004 bq2515x->init_data.ilim = BQ25150_DEFAULT_ILIM_UA;
1005 break;
1006 case BQ25155:
1007 bq2515x->init_data.ilim = BQ25155_DEFAULT_ILIM_UA;
1008 break;
1009 }
1010 }
1011
1012 bq2515x->ac_detect_gpio = devm_gpiod_get_optional(bq2515x->dev,
1013 "ac-detect", GPIOD_IN);
1014 if (IS_ERR(bq2515x->ac_detect_gpio)) {
1015 ret = PTR_ERR(bq2515x->ac_detect_gpio);
1016 dev_err(bq2515x->dev, "Failed to get ac detect");
1017 return ret;
1018 }
1019
1020 bq2515x->reset_gpio = devm_gpiod_get_optional(bq2515x->dev,
1021 "reset", GPIOD_OUT_LOW);
1022 if (IS_ERR(bq2515x->reset_gpio)) {
1023 ret = PTR_ERR(bq2515x->reset_gpio);
1024 dev_err(bq2515x->dev, "Failed to get reset");
1025 return ret;
1026 }
1027
1028 bq2515x->powerdown_gpio = devm_gpiod_get_optional(bq2515x->dev,
1029 "powerdown", GPIOD_OUT_LOW);
1030 if (IS_ERR(bq2515x->powerdown_gpio)) {
1031 ret = PTR_ERR(bq2515x->powerdown_gpio);
1032 dev_err(bq2515x->dev, "Failed to get powerdown");
1033 return ret;
1034 }
1035
1036 bq2515x->ce_gpio = devm_gpiod_get_optional(bq2515x->dev,
1037 "charge-enable",
1038 GPIOD_OUT_LOW);
1039 if (IS_ERR(bq2515x->ce_gpio)) {
1040 ret = PTR_ERR(bq2515x->ce_gpio);
1041 dev_err(bq2515x->dev, "Failed to get ce");
1042 return ret;
1043 }
1044
1045 return 0;
1046}
1047
1048static bool bq2515x_volatile_register(struct device *dev, unsigned int reg)
1049{
1050 switch (reg) {
1051 case BQ2515X_STAT0 ... BQ2515X_FLAG3:
1052 case BQ2515X_ADC_VBAT_M ... BQ2515X_ADC_IIN_L:
1053 return true;
1054 default:
1055 return false;
1056 }
1057}
1058
1059static const struct regmap_config bq25150_regmap_config = {
1060 .reg_bits = 8,
1061 .val_bits = 8,
1062
1063 .max_register = BQ2515X_DEVICE_ID,
1064 .reg_defaults = bq25150_reg_defaults,
1065 .num_reg_defaults = ARRAY_SIZE(bq25150_reg_defaults),
1066 .cache_type = REGCACHE_RBTREE,
1067 .volatile_reg = bq2515x_volatile_register,
1068};
1069
1070static const struct regmap_config bq25155_regmap_config = {
1071 .reg_bits = 8,
1072 .val_bits = 8,
1073
1074 .max_register = BQ2515X_DEVICE_ID,
1075 .reg_defaults = bq25155_reg_defaults,
1076 .num_reg_defaults = ARRAY_SIZE(bq25155_reg_defaults),
1077 .cache_type = REGCACHE_RBTREE,
1078 .volatile_reg = bq2515x_volatile_register,
1079};
1080
1081static int bq2515x_probe(struct i2c_client *client,
1082 const struct i2c_device_id *id)
1083{
1084 struct device *dev = &client->dev;
1085 struct bq2515x_device *bq2515x;
1086 struct power_supply_config charger_cfg = {};
1087 int ret;
1088
1089 bq2515x = devm_kzalloc(dev, sizeof(*bq2515x), GFP_KERNEL);
1090 if (!bq2515x)
1091 return -ENOMEM;
1092
1093 bq2515x->dev = dev;
1094
1095 strncpy(bq2515x->model_name, id->name, I2C_NAME_SIZE);
1096
1097 bq2515x->device_id = id->driver_data;
1098
1099 switch (bq2515x->device_id) {
1100 case BQ25150:
1101 bq2515x->regmap = devm_regmap_init_i2c(client,
1102 &bq25150_regmap_config);
1103 break;
1104 case BQ25155:
1105 bq2515x->regmap = devm_regmap_init_i2c(client,
1106 &bq25155_regmap_config);
1107 break;
1108 }
1109
1110 if (IS_ERR(bq2515x->regmap)) {
1111 dev_err(dev, "failed to allocate register map\n");
1112 return PTR_ERR(bq2515x->regmap);
1113 }
1114
1115 i2c_set_clientdata(client, bq2515x);
1116
1117 charger_cfg.drv_data = bq2515x;
1118 charger_cfg.of_node = dev->of_node;
1119
1120 ret = bq2515x_read_properties(bq2515x);
1121 if (ret) {
1122 dev_err(dev, "Failed to read device tree properties %d\n",
1123 ret);
1124 return ret;
1125 }
1126
1127 ret = bq2515x_power_supply_register(bq2515x, dev, charger_cfg);
1128 if (ret) {
1129 dev_err(dev, "failed to register power supply\n");
1130 return ret;
1131 }
1132
1133 ret = bq2515x_hw_init(bq2515x);
1134 if (ret) {
1135 dev_err(dev, "Cannot initialize the chip\n");
1136 return ret;
1137 }
1138
1139 return 0;
1140}
1141
1142static const struct i2c_device_id bq2515x_i2c_ids[] = {
1143 { "bq25150", BQ25150, },
1144 { "bq25155", BQ25155, },
1145 {},
1146};
1147MODULE_DEVICE_TABLE(i2c, bq2515x_i2c_ids);
1148
1149static const struct of_device_id bq2515x_of_match[] = {
1150 { .compatible = "ti,bq25150", },
1151 { .compatible = "ti,bq25155", },
1152 { },
1153};
1154MODULE_DEVICE_TABLE(of, bq2515x_of_match);
1155
1156static struct i2c_driver bq2515x_driver = {
1157 .driver = {
1158 .name = "bq2515x-charger",
1159 .of_match_table = bq2515x_of_match,
1160 },
1161 .probe = bq2515x_probe,
1162 .id_table = bq2515x_i2c_ids,
1163};
1164module_i2c_driver(bq2515x_driver);
1165
1166MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
1167MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
1168MODULE_DESCRIPTION("BQ2515X charger driver");
1169MODULE_LICENSE("GPL v2");
1170
