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27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/param.h>
30#include <linux/err.h>
31#include <linux/workqueue.h>
32#include <linux/sysfs.h>
33#include <linux/platform_device.h>
34#include <linux/power_supply.h>
35#include <linux/idr.h>
36#include <linux/i2c.h>
37#include <linux/slab.h>
38#include <linux/acpi.h>
39
40#include <linux/power/bq2415x_charger.h>
41
42
43#define BQ2415X_TIMER_TIMEOUT 10
44
45#define BQ2415X_REG_STATUS 0x00
46#define BQ2415X_REG_CONTROL 0x01
47#define BQ2415X_REG_VOLTAGE 0x02
48#define BQ2415X_REG_VENDER 0x03
49#define BQ2415X_REG_CURRENT 0x04
50
51
52#define BQ2415X_RESET_STATUS BIT(6)
53#define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5))
54#define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3))
55#define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7))
56
57
58#define BQ2415X_BIT_TMR_RST 7
59#define BQ2415X_BIT_OTG 7
60#define BQ2415X_BIT_EN_STAT 6
61#define BQ2415X_MASK_STAT (BIT(4)|BIT(5))
62#define BQ2415X_SHIFT_STAT 4
63#define BQ2415X_BIT_BOOST 3
64#define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2))
65#define BQ2415X_SHIFT_FAULT 0
66
67
68#define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7))
69#define BQ2415X_SHIFT_LIMIT 6
70#define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5))
71#define BQ2415X_SHIFT_VLOWV 4
72#define BQ2415X_BIT_TE 3
73#define BQ2415X_BIT_CE 2
74#define BQ2415X_BIT_HZ_MODE 1
75#define BQ2415X_BIT_OPA_MODE 0
76
77
78#define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
79#define BQ2415X_SHIFT_VO 2
80#define BQ2415X_BIT_OTG_PL 1
81#define BQ2415X_BIT_OTG_EN 0
82
83
84#define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7))
85#define BQ2415X_SHIFT_VENDER 5
86#define BQ2415X_MASK_PN (BIT(3)|BIT(4))
87#define BQ2415X_SHIFT_PN 3
88#define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2))
89#define BQ2415X_SHIFT_REVISION 0
90
91
92#define BQ2415X_MASK_RESET BIT(7)
93#define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6))
94#define BQ2415X_SHIFT_VI_CHRG 4
95
96#define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2))
97#define BQ2415X_SHIFT_VI_TERM 0
98
99
100enum bq2415x_command {
101 BQ2415X_TIMER_RESET,
102 BQ2415X_OTG_STATUS,
103 BQ2415X_STAT_PIN_STATUS,
104 BQ2415X_STAT_PIN_ENABLE,
105 BQ2415X_STAT_PIN_DISABLE,
106 BQ2415X_CHARGE_STATUS,
107 BQ2415X_BOOST_STATUS,
108 BQ2415X_FAULT_STATUS,
109
110 BQ2415X_CHARGE_TERMINATION_STATUS,
111 BQ2415X_CHARGE_TERMINATION_ENABLE,
112 BQ2415X_CHARGE_TERMINATION_DISABLE,
113 BQ2415X_CHARGER_STATUS,
114 BQ2415X_CHARGER_ENABLE,
115 BQ2415X_CHARGER_DISABLE,
116 BQ2415X_HIGH_IMPEDANCE_STATUS,
117 BQ2415X_HIGH_IMPEDANCE_ENABLE,
118 BQ2415X_HIGH_IMPEDANCE_DISABLE,
119 BQ2415X_BOOST_MODE_STATUS,
120 BQ2415X_BOOST_MODE_ENABLE,
121 BQ2415X_BOOST_MODE_DISABLE,
122
123 BQ2415X_OTG_LEVEL,
124 BQ2415X_OTG_ACTIVATE_HIGH,
125 BQ2415X_OTG_ACTIVATE_LOW,
126 BQ2415X_OTG_PIN_STATUS,
127 BQ2415X_OTG_PIN_ENABLE,
128 BQ2415X_OTG_PIN_DISABLE,
129
130 BQ2415X_VENDER_CODE,
131 BQ2415X_PART_NUMBER,
132 BQ2415X_REVISION,
133};
134
135enum bq2415x_chip {
136 BQUNKNOWN,
137 BQ24150,
138 BQ24150A,
139 BQ24151,
140 BQ24151A,
141 BQ24152,
142 BQ24153,
143 BQ24153A,
144 BQ24155,
145 BQ24156,
146 BQ24156A,
147 BQ24157S,
148 BQ24158,
149};
150
151static char *bq2415x_chip_name[] = {
152 "unknown",
153 "bq24150",
154 "bq24150a",
155 "bq24151",
156 "bq24151a",
157 "bq24152",
158 "bq24153",
159 "bq24153a",
160 "bq24155",
161 "bq24156",
162 "bq24156a",
163 "bq24157s",
164 "bq24158",
165};
166
167struct bq2415x_device {
168 struct device *dev;
169 struct bq2415x_platform_data init_data;
170 struct power_supply *charger;
171 struct power_supply_desc charger_desc;
172 struct delayed_work work;
173 struct device_node *notify_node;
174 struct notifier_block nb;
175 enum bq2415x_mode reported_mode;
176 enum bq2415x_mode mode;
177 enum bq2415x_chip chip;
178 const char *timer_error;
179 char *model;
180 char *name;
181 int autotimer;
182 int automode;
183 int id;
184};
185
186
187static DEFINE_IDR(bq2415x_id);
188
189static DEFINE_MUTEX(bq2415x_id_mutex);
190static DEFINE_MUTEX(bq2415x_timer_mutex);
191static DEFINE_MUTEX(bq2415x_i2c_mutex);
192
193
194
195
196static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
197{
198 struct i2c_client *client = to_i2c_client(bq->dev);
199 struct i2c_msg msg[2];
200 u8 val;
201 int ret;
202
203 if (!client->adapter)
204 return -ENODEV;
205
206 msg[0].addr = client->addr;
207 msg[0].flags = 0;
208 msg[0].buf = ®
209 msg[0].len = sizeof(reg);
210 msg[1].addr = client->addr;
211 msg[1].flags = I2C_M_RD;
212 msg[1].buf = &val;
213 msg[1].len = sizeof(val);
214
215 mutex_lock(&bq2415x_i2c_mutex);
216 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
217 mutex_unlock(&bq2415x_i2c_mutex);
218
219 if (ret < 0)
220 return ret;
221
222 return val;
223}
224
225
226static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
227 u8 mask, u8 shift)
228{
229 int ret;
230
231 if (shift > 8)
232 return -EINVAL;
233
234 ret = bq2415x_i2c_read(bq, reg);
235 if (ret < 0)
236 return ret;
237 return (ret & mask) >> shift;
238}
239
240
241static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
242{
243 if (bit > 8)
244 return -EINVAL;
245 return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
246}
247
248
249
250
251static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
252{
253 struct i2c_client *client = to_i2c_client(bq->dev);
254 struct i2c_msg msg[1];
255 u8 data[2];
256 int ret;
257
258 data[0] = reg;
259 data[1] = val;
260
261 msg[0].addr = client->addr;
262 msg[0].flags = 0;
263 msg[0].buf = data;
264 msg[0].len = ARRAY_SIZE(data);
265
266 mutex_lock(&bq2415x_i2c_mutex);
267 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
268 mutex_unlock(&bq2415x_i2c_mutex);
269
270
271 if (ret < 0)
272 return ret;
273 else if (ret != 1)
274 return -EIO;
275
276 return 0;
277}
278
279
280static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
281 u8 mask, u8 shift)
282{
283 int ret;
284
285 if (shift > 8)
286 return -EINVAL;
287
288 ret = bq2415x_i2c_read(bq, reg);
289 if (ret < 0)
290 return ret;
291
292 ret &= ~mask;
293 ret |= val << shift;
294
295 return bq2415x_i2c_write(bq, reg, ret);
296}
297
298
299static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
300 bool val, u8 bit)
301{
302 if (bit > 8)
303 return -EINVAL;
304 return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
305}
306
307
308
309
310static int bq2415x_exec_command(struct bq2415x_device *bq,
311 enum bq2415x_command command)
312{
313 int ret;
314
315 switch (command) {
316 case BQ2415X_TIMER_RESET:
317 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
318 1, BQ2415X_BIT_TMR_RST);
319 case BQ2415X_OTG_STATUS:
320 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
321 BQ2415X_BIT_OTG);
322 case BQ2415X_STAT_PIN_STATUS:
323 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
324 BQ2415X_BIT_EN_STAT);
325 case BQ2415X_STAT_PIN_ENABLE:
326 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
327 BQ2415X_BIT_EN_STAT);
328 case BQ2415X_STAT_PIN_DISABLE:
329 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
330 BQ2415X_BIT_EN_STAT);
331 case BQ2415X_CHARGE_STATUS:
332 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
333 BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
334 case BQ2415X_BOOST_STATUS:
335 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
336 BQ2415X_BIT_BOOST);
337 case BQ2415X_FAULT_STATUS:
338 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
339 BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
340
341 case BQ2415X_CHARGE_TERMINATION_STATUS:
342 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
343 BQ2415X_BIT_TE);
344 case BQ2415X_CHARGE_TERMINATION_ENABLE:
345 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
346 1, BQ2415X_BIT_TE);
347 case BQ2415X_CHARGE_TERMINATION_DISABLE:
348 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
349 0, BQ2415X_BIT_TE);
350 case BQ2415X_CHARGER_STATUS:
351 ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
352 BQ2415X_BIT_CE);
353 if (ret < 0)
354 return ret;
355 return ret > 0 ? 0 : 1;
356 case BQ2415X_CHARGER_ENABLE:
357 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
358 0, BQ2415X_BIT_CE);
359 case BQ2415X_CHARGER_DISABLE:
360 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
361 1, BQ2415X_BIT_CE);
362 case BQ2415X_HIGH_IMPEDANCE_STATUS:
363 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
364 BQ2415X_BIT_HZ_MODE);
365 case BQ2415X_HIGH_IMPEDANCE_ENABLE:
366 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
367 1, BQ2415X_BIT_HZ_MODE);
368 case BQ2415X_HIGH_IMPEDANCE_DISABLE:
369 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
370 0, BQ2415X_BIT_HZ_MODE);
371 case BQ2415X_BOOST_MODE_STATUS:
372 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
373 BQ2415X_BIT_OPA_MODE);
374 case BQ2415X_BOOST_MODE_ENABLE:
375 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
376 1, BQ2415X_BIT_OPA_MODE);
377 case BQ2415X_BOOST_MODE_DISABLE:
378 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
379 0, BQ2415X_BIT_OPA_MODE);
380
381 case BQ2415X_OTG_LEVEL:
382 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
383 BQ2415X_BIT_OTG_PL);
384 case BQ2415X_OTG_ACTIVATE_HIGH:
385 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
386 1, BQ2415X_BIT_OTG_PL);
387 case BQ2415X_OTG_ACTIVATE_LOW:
388 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
389 0, BQ2415X_BIT_OTG_PL);
390 case BQ2415X_OTG_PIN_STATUS:
391 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
392 BQ2415X_BIT_OTG_EN);
393 case BQ2415X_OTG_PIN_ENABLE:
394 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
395 1, BQ2415X_BIT_OTG_EN);
396 case BQ2415X_OTG_PIN_DISABLE:
397 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
398 0, BQ2415X_BIT_OTG_EN);
399
400 case BQ2415X_VENDER_CODE:
401 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
402 BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
403 case BQ2415X_PART_NUMBER:
404 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
405 BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
406 case BQ2415X_REVISION:
407 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
408 BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
409 }
410 return -EINVAL;
411}
412
413
414static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
415{
416 struct i2c_client *client = to_i2c_client(bq->dev);
417 int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
418
419 if (ret < 0)
420 return ret;
421
422 switch (client->addr) {
423 case 0x6b:
424 switch (ret) {
425 case 0:
426 if (bq->chip == BQ24151A)
427 return bq->chip;
428 return BQ24151;
429 case 1:
430 if (bq->chip == BQ24150A ||
431 bq->chip == BQ24152 ||
432 bq->chip == BQ24155)
433 return bq->chip;
434 return BQ24150;
435 case 2:
436 if (bq->chip == BQ24153A)
437 return bq->chip;
438 return BQ24153;
439 default:
440 return BQUNKNOWN;
441 }
442 break;
443
444 case 0x6a:
445 switch (ret) {
446 case 0:
447 if (bq->chip == BQ24156A)
448 return bq->chip;
449 return BQ24156;
450 case 2:
451 if (bq->chip == BQ24157S)
452 return bq->chip;
453 return BQ24158;
454 default:
455 return BQUNKNOWN;
456 }
457 break;
458 }
459
460 return BQUNKNOWN;
461}
462
463
464static int bq2415x_detect_revision(struct bq2415x_device *bq)
465{
466 int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
467 int chip = bq2415x_detect_chip(bq);
468
469 if (ret < 0 || chip < 0)
470 return -1;
471
472 switch (chip) {
473 case BQ24150:
474 case BQ24150A:
475 case BQ24151:
476 case BQ24151A:
477 case BQ24152:
478 if (ret >= 0 && ret <= 3)
479 return ret;
480 return -1;
481 case BQ24153:
482 case BQ24153A:
483 case BQ24156:
484 case BQ24156A:
485 case BQ24157S:
486 case BQ24158:
487 if (ret == 3)
488 return 0;
489 else if (ret == 1)
490 return 1;
491 return -1;
492 case BQ24155:
493 if (ret == 3)
494 return 3;
495 return -1;
496 case BQUNKNOWN:
497 return -1;
498 }
499
500 return -1;
501}
502
503
504static int bq2415x_get_vender_code(struct bq2415x_device *bq)
505{
506 int ret;
507
508 ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
509 if (ret < 0)
510 return 0;
511
512
513 return (ret & 0x1) +
514 ((ret >> 1) & 0x1) * 10 +
515 ((ret >> 2) & 0x1) * 100;
516}
517
518
519static void bq2415x_reset_chip(struct bq2415x_device *bq)
520{
521 bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
522 bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
523 bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
524 bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
525 bq->timer_error = NULL;
526}
527
528
529
530
531static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
532{
533 int val;
534
535 if (mA <= 100)
536 val = 0;
537 else if (mA <= 500)
538 val = 1;
539 else if (mA <= 800)
540 val = 2;
541 else
542 val = 3;
543
544 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
545 BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
546}
547
548
549static int bq2415x_get_current_limit(struct bq2415x_device *bq)
550{
551 int ret;
552
553 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
554 BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
555 if (ret < 0)
556 return ret;
557 else if (ret == 0)
558 return 100;
559 else if (ret == 1)
560 return 500;
561 else if (ret == 2)
562 return 800;
563 else if (ret == 3)
564 return 1800;
565 return -EINVAL;
566}
567
568
569static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
570{
571 int val;
572
573
574 if (mV <= 3400 + 50)
575 val = 0;
576 else if (mV <= 3500 + 50)
577 val = 1;
578 else if (mV <= 3600 + 50)
579 val = 2;
580 else
581 val = 3;
582
583 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
584 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
585}
586
587
588static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
589{
590 int ret;
591
592 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
593 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
594 if (ret < 0)
595 return ret;
596 return 100 * (34 + ret);
597}
598
599
600static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
601 int mV)
602{
603 int val = (mV/10 - 350) / 2;
604
605
606
607
608
609 if (val < 0)
610 val = 0;
611 else if (val > 47)
612 return -EINVAL;
613
614 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
615 BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
616}
617
618
619static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
620{
621 int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
622 BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
623
624 if (ret < 0)
625 return ret;
626 return 10 * (350 + 2*ret);
627}
628
629
630static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
631{
632 int val;
633
634 if (bq->init_data.resistor_sense <= 0)
635 return -EINVAL;
636
637 val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
638 if (val < 0)
639 val = 0;
640 else if (val > 7)
641 val = 7;
642
643 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
644 BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET,
645 BQ2415X_SHIFT_VI_CHRG);
646}
647
648
649static int bq2415x_get_charge_current(struct bq2415x_device *bq)
650{
651 int ret;
652
653 if (bq->init_data.resistor_sense <= 0)
654 return -EINVAL;
655
656 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
657 BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
658 if (ret < 0)
659 return ret;
660 return (37400 + 6800*ret) / bq->init_data.resistor_sense;
661}
662
663
664static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
665{
666 int val;
667
668 if (bq->init_data.resistor_sense <= 0)
669 return -EINVAL;
670
671 val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
672 if (val < 0)
673 val = 0;
674 else if (val > 7)
675 val = 7;
676
677 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
678 BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET,
679 BQ2415X_SHIFT_VI_TERM);
680}
681
682
683static int bq2415x_get_termination_current(struct bq2415x_device *bq)
684{
685 int ret;
686
687 if (bq->init_data.resistor_sense <= 0)
688 return -EINVAL;
689
690 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
691 BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
692 if (ret < 0)
693 return ret;
694 return (3400 + 3400*ret) / bq->init_data.resistor_sense;
695}
696
697
698#define bq2415x_set_default_value(bq, prop) \
699 do { \
700 int ret = 0; \
701 if (bq->init_data.prop != -1) \
702 ret = bq2415x_set_##prop(bq, bq->init_data.prop); \
703 if (ret < 0) \
704 return ret; \
705 } while (0)
706
707
708static int bq2415x_set_defaults(struct bq2415x_device *bq)
709{
710 bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
711 bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
712 bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE);
713
714 bq2415x_set_default_value(bq, current_limit);
715 bq2415x_set_default_value(bq, weak_battery_voltage);
716 bq2415x_set_default_value(bq, battery_regulation_voltage);
717
718 if (bq->init_data.resistor_sense > 0) {
719 bq2415x_set_default_value(bq, charge_current);
720 bq2415x_set_default_value(bq, termination_current);
721 bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
722 }
723
724 bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
725 return 0;
726}
727
728
729
730
731static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
732{
733 int ret = 0;
734 int charger = 0;
735 int boost = 0;
736
737 if (mode == BQ2415X_MODE_BOOST)
738 boost = 1;
739 else if (mode != BQ2415X_MODE_OFF)
740 charger = 1;
741
742 if (!charger)
743 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
744
745 if (!boost)
746 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
747
748 if (ret < 0)
749 return ret;
750
751 switch (mode) {
752 case BQ2415X_MODE_OFF:
753 dev_dbg(bq->dev, "changing mode to: Offline\n");
754 ret = bq2415x_set_current_limit(bq, 100);
755 break;
756 case BQ2415X_MODE_NONE:
757 dev_dbg(bq->dev, "changing mode to: N/A\n");
758 ret = bq2415x_set_current_limit(bq, 100);
759 break;
760 case BQ2415X_MODE_HOST_CHARGER:
761 dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n");
762 ret = bq2415x_set_current_limit(bq, 500);
763 break;
764 case BQ2415X_MODE_DEDICATED_CHARGER:
765 dev_dbg(bq->dev, "changing mode to: Dedicated charger\n");
766 ret = bq2415x_set_current_limit(bq, 1800);
767 break;
768 case BQ2415X_MODE_BOOST:
769 dev_dbg(bq->dev, "changing mode to: Boost\n");
770 ret = bq2415x_set_current_limit(bq, 100);
771 break;
772 }
773
774 if (ret < 0)
775 return ret;
776
777 if (charger)
778 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
779 else if (boost)
780 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
781
782 if (ret < 0)
783 return ret;
784
785 bq2415x_set_default_value(bq, weak_battery_voltage);
786 bq2415x_set_default_value(bq, battery_regulation_voltage);
787
788 bq->mode = mode;
789 sysfs_notify(&bq->charger->dev.kobj, NULL, "mode");
790
791 return 0;
792
793}
794
795static bool bq2415x_update_reported_mode(struct bq2415x_device *bq, int mA)
796{
797 enum bq2415x_mode mode;
798
799 if (mA == 0)
800 mode = BQ2415X_MODE_OFF;
801 else if (mA < 500)
802 mode = BQ2415X_MODE_NONE;
803 else if (mA < 1800)
804 mode = BQ2415X_MODE_HOST_CHARGER;
805 else
806 mode = BQ2415X_MODE_DEDICATED_CHARGER;
807
808 if (bq->reported_mode == mode)
809 return false;
810
811 bq->reported_mode = mode;
812 return true;
813}
814
815static int bq2415x_notifier_call(struct notifier_block *nb,
816 unsigned long val, void *v)
817{
818 struct bq2415x_device *bq =
819 container_of(nb, struct bq2415x_device, nb);
820 struct power_supply *psy = v;
821 union power_supply_propval prop;
822 int ret;
823
824 if (val != PSY_EVENT_PROP_CHANGED)
825 return NOTIFY_OK;
826
827
828 if (bq->notify_node) {
829 if (!psy->dev.parent ||
830 psy->dev.parent->of_node != bq->notify_node)
831 return NOTIFY_OK;
832 } else if (bq->init_data.notify_device) {
833 if (strcmp(psy->desc->name, bq->init_data.notify_device) != 0)
834 return NOTIFY_OK;
835 }
836
837 dev_dbg(bq->dev, "notifier call was called\n");
838
839 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX,
840 &prop);
841 if (ret != 0)
842 return NOTIFY_OK;
843
844 if (!bq2415x_update_reported_mode(bq, prop.intval))
845 return NOTIFY_OK;
846
847
848 if (bq->automode < 1)
849 return NOTIFY_OK;
850
851 schedule_delayed_work(&bq->work, 0);
852
853 return NOTIFY_OK;
854}
855
856
857
858
859static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
860{
861 mutex_lock(&bq2415x_timer_mutex);
862
863 if (bq->autotimer == state) {
864 mutex_unlock(&bq2415x_timer_mutex);
865 return;
866 }
867
868 bq->autotimer = state;
869
870 if (state) {
871 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
872 bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
873 bq->timer_error = NULL;
874 } else {
875 cancel_delayed_work_sync(&bq->work);
876 }
877
878 mutex_unlock(&bq2415x_timer_mutex);
879}
880
881
882static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
883{
884 bq->timer_error = msg;
885 sysfs_notify(&bq->charger->dev.kobj, NULL, "timer");
886 dev_err(bq->dev, "%s\n", msg);
887 if (bq->automode > 0)
888 bq->automode = 0;
889 bq2415x_set_mode(bq, BQ2415X_MODE_OFF);
890 bq2415x_set_autotimer(bq, 0);
891}
892
893
894static void bq2415x_timer_work(struct work_struct *work)
895{
896 struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
897 work.work);
898 int ret;
899 int error;
900 int boost;
901
902 if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
903 sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
904 bq2415x_set_mode(bq, bq->reported_mode);
905 }
906
907 if (!bq->autotimer)
908 return;
909
910 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
911 if (ret < 0) {
912 bq2415x_timer_error(bq, "Resetting timer failed");
913 return;
914 }
915
916 boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
917 if (boost < 0) {
918 bq2415x_timer_error(bq, "Unknown error");
919 return;
920 }
921
922 error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
923 if (error < 0) {
924 bq2415x_timer_error(bq, "Unknown error");
925 return;
926 }
927
928 if (boost) {
929 switch (error) {
930
931 case 0:
932 break;
933 case 6:
934 dev_err(bq->dev, "Timer expired\n");
935 break;
936 case 3:
937 dev_err(bq->dev, "Battery voltage to low\n");
938 break;
939
940
941 case 1:
942 bq2415x_timer_error(bq,
943 "Overvoltage protection (chip fried)");
944 return;
945 case 2:
946 bq2415x_timer_error(bq, "Overload");
947 return;
948 case 4:
949 bq2415x_timer_error(bq,
950 "Battery overvoltage protection");
951 return;
952 case 5:
953 bq2415x_timer_error(bq,
954 "Thermal shutdown (too hot)");
955 return;
956 case 7:
957 bq2415x_timer_error(bq, "Unknown error");
958 return;
959 }
960 } else {
961 switch (error) {
962
963 case 0:
964 break;
965 case 2:
966 dev_err(bq->dev, "Sleep mode\n");
967 break;
968 case 3:
969 dev_err(bq->dev, "Poor input source\n");
970 break;
971 case 6:
972 dev_err(bq->dev, "Timer expired\n");
973 break;
974 case 7:
975 dev_err(bq->dev, "No battery\n");
976 break;
977
978
979 case 1:
980 bq2415x_timer_error(bq,
981 "Overvoltage protection (chip fried)");
982 return;
983 case 4:
984 bq2415x_timer_error(bq,
985 "Battery overvoltage protection");
986 return;
987 case 5:
988 bq2415x_timer_error(bq,
989 "Thermal shutdown (too hot)");
990 return;
991 }
992 }
993
994 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
995}
996
997
998
999static enum power_supply_property bq2415x_power_supply_props[] = {
1000
1001 POWER_SUPPLY_PROP_STATUS,
1002 POWER_SUPPLY_PROP_MODEL_NAME,
1003};
1004
1005static int bq2415x_power_supply_get_property(struct power_supply *psy,
1006 enum power_supply_property psp,
1007 union power_supply_propval *val)
1008{
1009 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1010 int ret;
1011
1012 switch (psp) {
1013 case POWER_SUPPLY_PROP_STATUS:
1014 ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
1015 if (ret < 0)
1016 return ret;
1017 else if (ret == 0)
1018 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1019 else if (ret == 1)
1020 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1021 else if (ret == 2)
1022 val->intval = POWER_SUPPLY_STATUS_FULL;
1023 else
1024 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
1025 break;
1026 case POWER_SUPPLY_PROP_MODEL_NAME:
1027 val->strval = bq->model;
1028 break;
1029 default:
1030 return -EINVAL;
1031 }
1032 return 0;
1033}
1034
1035static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
1036{
1037 bq->autotimer = 0;
1038 if (bq->automode > 0)
1039 bq->automode = 0;
1040 cancel_delayed_work_sync(&bq->work);
1041 power_supply_unregister(bq->charger);
1042 kfree(bq->model);
1043}
1044
1045
1046
1047
1048static ssize_t bq2415x_sysfs_show_status(struct device *dev,
1049 struct device_attribute *attr,
1050 char *buf)
1051{
1052 struct power_supply *psy = dev_get_drvdata(dev);
1053 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1054 enum bq2415x_command command;
1055 int ret;
1056
1057 if (strcmp(attr->attr.name, "otg_status") == 0)
1058 command = BQ2415X_OTG_STATUS;
1059 else if (strcmp(attr->attr.name, "charge_status") == 0)
1060 command = BQ2415X_CHARGE_STATUS;
1061 else if (strcmp(attr->attr.name, "boost_status") == 0)
1062 command = BQ2415X_BOOST_STATUS;
1063 else if (strcmp(attr->attr.name, "fault_status") == 0)
1064 command = BQ2415X_FAULT_STATUS;
1065 else
1066 return -EINVAL;
1067
1068 ret = bq2415x_exec_command(bq, command);
1069 if (ret < 0)
1070 return ret;
1071 return sprintf(buf, "%d\n", ret);
1072}
1073
1074
1075
1076
1077
1078
1079
1080static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1081 struct device_attribute *attr,
1082 const char *buf,
1083 size_t count)
1084{
1085 struct power_supply *psy = dev_get_drvdata(dev);
1086 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1087 int ret = 0;
1088
1089 if (strncmp(buf, "auto", 4) == 0)
1090 bq2415x_set_autotimer(bq, 1);
1091 else if (strncmp(buf, "off", 3) == 0)
1092 bq2415x_set_autotimer(bq, 0);
1093 else
1094 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1095
1096 if (ret < 0)
1097 return ret;
1098 return count;
1099}
1100
1101
1102static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1103 struct device_attribute *attr,
1104 char *buf)
1105{
1106 struct power_supply *psy = dev_get_drvdata(dev);
1107 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1108
1109 if (bq->timer_error)
1110 return sprintf(buf, "%s\n", bq->timer_error);
1111
1112 if (bq->autotimer)
1113 return sprintf(buf, "auto\n");
1114 return sprintf(buf, "off\n");
1115}
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1126 struct device_attribute *attr,
1127 const char *buf,
1128 size_t count)
1129{
1130 struct power_supply *psy = dev_get_drvdata(dev);
1131 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1132 enum bq2415x_mode mode;
1133 int ret = 0;
1134
1135 if (strncmp(buf, "auto", 4) == 0) {
1136 if (bq->automode < 0)
1137 return -EINVAL;
1138 bq->automode = 1;
1139 mode = bq->reported_mode;
1140 } else if (strncmp(buf, "off", 3) == 0) {
1141 if (bq->automode > 0)
1142 bq->automode = 0;
1143 mode = BQ2415X_MODE_OFF;
1144 } else if (strncmp(buf, "none", 4) == 0) {
1145 if (bq->automode > 0)
1146 bq->automode = 0;
1147 mode = BQ2415X_MODE_NONE;
1148 } else if (strncmp(buf, "host", 4) == 0) {
1149 if (bq->automode > 0)
1150 bq->automode = 0;
1151 mode = BQ2415X_MODE_HOST_CHARGER;
1152 } else if (strncmp(buf, "dedicated", 9) == 0) {
1153 if (bq->automode > 0)
1154 bq->automode = 0;
1155 mode = BQ2415X_MODE_DEDICATED_CHARGER;
1156 } else if (strncmp(buf, "boost", 5) == 0) {
1157 if (bq->automode > 0)
1158 bq->automode = 0;
1159 mode = BQ2415X_MODE_BOOST;
1160 } else if (strncmp(buf, "reset", 5) == 0) {
1161 bq2415x_reset_chip(bq);
1162 bq2415x_set_defaults(bq);
1163 if (bq->automode <= 0)
1164 return count;
1165 bq->automode = 1;
1166 mode = bq->reported_mode;
1167 } else {
1168 return -EINVAL;
1169 }
1170
1171 ret = bq2415x_set_mode(bq, mode);
1172 if (ret < 0)
1173 return ret;
1174 return count;
1175}
1176
1177
1178static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1179 struct device_attribute *attr,
1180 char *buf)
1181{
1182 struct power_supply *psy = dev_get_drvdata(dev);
1183 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1184 ssize_t ret = 0;
1185
1186 if (bq->automode > 0)
1187 ret += sprintf(buf+ret, "auto (");
1188
1189 switch (bq->mode) {
1190 case BQ2415X_MODE_OFF:
1191 ret += sprintf(buf+ret, "off");
1192 break;
1193 case BQ2415X_MODE_NONE:
1194 ret += sprintf(buf+ret, "none");
1195 break;
1196 case BQ2415X_MODE_HOST_CHARGER:
1197 ret += sprintf(buf+ret, "host");
1198 break;
1199 case BQ2415X_MODE_DEDICATED_CHARGER:
1200 ret += sprintf(buf+ret, "dedicated");
1201 break;
1202 case BQ2415X_MODE_BOOST:
1203 ret += sprintf(buf+ret, "boost");
1204 break;
1205 }
1206
1207 if (bq->automode > 0)
1208 ret += sprintf(buf+ret, ")");
1209
1210 ret += sprintf(buf+ret, "\n");
1211 return ret;
1212}
1213
1214
1215static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
1216 struct device_attribute *attr,
1217 char *buf)
1218{
1219 struct power_supply *psy = dev_get_drvdata(dev);
1220 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1221
1222 if (bq->automode < 0)
1223 return -EINVAL;
1224
1225 switch (bq->reported_mode) {
1226 case BQ2415X_MODE_OFF:
1227 return sprintf(buf, "off\n");
1228 case BQ2415X_MODE_NONE:
1229 return sprintf(buf, "none\n");
1230 case BQ2415X_MODE_HOST_CHARGER:
1231 return sprintf(buf, "host\n");
1232 case BQ2415X_MODE_DEDICATED_CHARGER:
1233 return sprintf(buf, "dedicated\n");
1234 case BQ2415X_MODE_BOOST:
1235 return sprintf(buf, "boost\n");
1236 }
1237
1238 return -EINVAL;
1239}
1240
1241
1242static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1243 struct device_attribute *attr,
1244 const char *buf,
1245 size_t count)
1246{
1247 struct power_supply *psy = dev_get_drvdata(dev);
1248 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1249 ssize_t ret = 0;
1250 unsigned int reg;
1251 unsigned int val;
1252
1253 if (sscanf(buf, "%x %x", ®, &val) != 2)
1254 return -EINVAL;
1255
1256 if (reg > 4 || val > 255)
1257 return -EINVAL;
1258
1259 ret = bq2415x_i2c_write(bq, reg, val);
1260 if (ret < 0)
1261 return ret;
1262 return count;
1263}
1264
1265
1266static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1267 u8 reg,
1268 char *buf)
1269{
1270 int ret = bq2415x_i2c_read(bq, reg);
1271
1272 if (ret < 0)
1273 return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1274 return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1275}
1276
1277
1278static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1279 struct device_attribute *attr,
1280 char *buf)
1281{
1282 struct power_supply *psy = dev_get_drvdata(dev);
1283 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1284 ssize_t ret = 0;
1285
1286 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1287 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1288 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1289 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1290 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1291 return ret;
1292}
1293
1294
1295static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1296 struct device_attribute *attr,
1297 const char *buf,
1298 size_t count)
1299{
1300 struct power_supply *psy = dev_get_drvdata(dev);
1301 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1302 long val;
1303 int ret;
1304
1305 if (kstrtol(buf, 10, &val) < 0)
1306 return -EINVAL;
1307
1308 if (strcmp(attr->attr.name, "current_limit") == 0)
1309 ret = bq2415x_set_current_limit(bq, val);
1310 else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1311 ret = bq2415x_set_weak_battery_voltage(bq, val);
1312 else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1313 ret = bq2415x_set_battery_regulation_voltage(bq, val);
1314 else if (strcmp(attr->attr.name, "charge_current") == 0)
1315 ret = bq2415x_set_charge_current(bq, val);
1316 else if (strcmp(attr->attr.name, "termination_current") == 0)
1317 ret = bq2415x_set_termination_current(bq, val);
1318 else
1319 return -EINVAL;
1320
1321 if (ret < 0)
1322 return ret;
1323 return count;
1324}
1325
1326
1327static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1328 struct device_attribute *attr,
1329 char *buf)
1330{
1331 struct power_supply *psy = dev_get_drvdata(dev);
1332 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1333 int ret;
1334
1335 if (strcmp(attr->attr.name, "current_limit") == 0)
1336 ret = bq2415x_get_current_limit(bq);
1337 else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1338 ret = bq2415x_get_weak_battery_voltage(bq);
1339 else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1340 ret = bq2415x_get_battery_regulation_voltage(bq);
1341 else if (strcmp(attr->attr.name, "charge_current") == 0)
1342 ret = bq2415x_get_charge_current(bq);
1343 else if (strcmp(attr->attr.name, "termination_current") == 0)
1344 ret = bq2415x_get_termination_current(bq);
1345 else
1346 return -EINVAL;
1347
1348 if (ret < 0)
1349 return ret;
1350 return sprintf(buf, "%d\n", ret);
1351}
1352
1353
1354static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1355 struct device_attribute *attr,
1356 const char *buf,
1357 size_t count)
1358{
1359 struct power_supply *psy = dev_get_drvdata(dev);
1360 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1361 enum bq2415x_command command;
1362 long val;
1363 int ret;
1364
1365 if (kstrtol(buf, 10, &val) < 0)
1366 return -EINVAL;
1367
1368 if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1369 command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1370 BQ2415X_CHARGE_TERMINATION_DISABLE;
1371 else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1372 command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1373 BQ2415X_HIGH_IMPEDANCE_DISABLE;
1374 else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1375 command = val ? BQ2415X_OTG_PIN_ENABLE :
1376 BQ2415X_OTG_PIN_DISABLE;
1377 else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1378 command = val ? BQ2415X_STAT_PIN_ENABLE :
1379 BQ2415X_STAT_PIN_DISABLE;
1380 else
1381 return -EINVAL;
1382
1383 ret = bq2415x_exec_command(bq, command);
1384 if (ret < 0)
1385 return ret;
1386 return count;
1387}
1388
1389
1390static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1391 struct device_attribute *attr,
1392 char *buf)
1393{
1394 struct power_supply *psy = dev_get_drvdata(dev);
1395 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1396 enum bq2415x_command command;
1397 int ret;
1398
1399 if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1400 command = BQ2415X_CHARGE_TERMINATION_STATUS;
1401 else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1402 command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1403 else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1404 command = BQ2415X_OTG_PIN_STATUS;
1405 else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1406 command = BQ2415X_STAT_PIN_STATUS;
1407 else
1408 return -EINVAL;
1409
1410 ret = bq2415x_exec_command(bq, command);
1411 if (ret < 0)
1412 return ret;
1413 return sprintf(buf, "%d\n", ret);
1414}
1415
1416static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1417 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1418static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1419 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1420static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1421 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1422static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1423 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1424static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1425 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1426
1427static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1428 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1429static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1430 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1431static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1432 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1433static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1434 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1435
1436static DEVICE_ATTR(reported_mode, S_IRUGO,
1437 bq2415x_sysfs_show_reported_mode, NULL);
1438static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1439 bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1440static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1441 bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1442
1443static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1444 bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1445
1446static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1447static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1448static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1449static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1450
1451static struct attribute *bq2415x_sysfs_attrs[] = {
1452
1453
1454
1455
1456 &dev_attr_current_limit.attr,
1457 &dev_attr_weak_battery_voltage.attr,
1458 &dev_attr_battery_regulation_voltage.attr,
1459 &dev_attr_charge_current.attr,
1460 &dev_attr_termination_current.attr,
1461
1462 &dev_attr_charge_termination_enable.attr,
1463 &dev_attr_high_impedance_enable.attr,
1464 &dev_attr_otg_pin_enable.attr,
1465 &dev_attr_stat_pin_enable.attr,
1466
1467 &dev_attr_reported_mode.attr,
1468 &dev_attr_mode.attr,
1469 &dev_attr_timer.attr,
1470
1471 &dev_attr_registers.attr,
1472
1473 &dev_attr_otg_status.attr,
1474 &dev_attr_charge_status.attr,
1475 &dev_attr_boost_status.attr,
1476 &dev_attr_fault_status.attr,
1477 NULL,
1478};
1479
1480ATTRIBUTE_GROUPS(bq2415x_sysfs);
1481
1482static int bq2415x_power_supply_init(struct bq2415x_device *bq)
1483{
1484 int ret;
1485 int chip;
1486 char revstr[8];
1487 struct power_supply_config psy_cfg = {
1488 .drv_data = bq,
1489 .of_node = bq->dev->of_node,
1490 .attr_grp = bq2415x_sysfs_groups,
1491 };
1492
1493 bq->charger_desc.name = bq->name;
1494 bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
1495 bq->charger_desc.properties = bq2415x_power_supply_props;
1496 bq->charger_desc.num_properties =
1497 ARRAY_SIZE(bq2415x_power_supply_props);
1498 bq->charger_desc.get_property = bq2415x_power_supply_get_property;
1499
1500 ret = bq2415x_detect_chip(bq);
1501 if (ret < 0)
1502 chip = BQUNKNOWN;
1503 else
1504 chip = ret;
1505
1506 ret = bq2415x_detect_revision(bq);
1507 if (ret < 0)
1508 strcpy(revstr, "unknown");
1509 else
1510 sprintf(revstr, "1.%d", ret);
1511
1512 bq->model = kasprintf(GFP_KERNEL,
1513 "chip %s, revision %s, vender code %.3d",
1514 bq2415x_chip_name[chip], revstr,
1515 bq2415x_get_vender_code(bq));
1516 if (!bq->model) {
1517 dev_err(bq->dev, "failed to allocate model name\n");
1518 return -ENOMEM;
1519 }
1520
1521 bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
1522 &psy_cfg);
1523 if (IS_ERR(bq->charger)) {
1524 kfree(bq->model);
1525 return PTR_ERR(bq->charger);
1526 }
1527
1528 return 0;
1529}
1530
1531
1532static int bq2415x_probe(struct i2c_client *client,
1533 const struct i2c_device_id *id)
1534{
1535 int ret;
1536 int num;
1537 char *name = NULL;
1538 struct bq2415x_device *bq;
1539 struct device_node *np = client->dev.of_node;
1540 struct bq2415x_platform_data *pdata = client->dev.platform_data;
1541 const struct acpi_device_id *acpi_id = NULL;
1542 struct power_supply *notify_psy = NULL;
1543 union power_supply_propval prop;
1544
1545 if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
1546 dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
1547 return -ENODEV;
1548 }
1549
1550
1551 mutex_lock(&bq2415x_id_mutex);
1552 num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
1553 mutex_unlock(&bq2415x_id_mutex);
1554 if (num < 0)
1555 return num;
1556
1557 if (id) {
1558 name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1559 } else if (ACPI_HANDLE(&client->dev)) {
1560 acpi_id =
1561 acpi_match_device(client->dev.driver->acpi_match_table,
1562 &client->dev);
1563 if (!acpi_id) {
1564 dev_err(&client->dev, "failed to match device name\n");
1565 ret = -ENODEV;
1566 goto error_1;
1567 }
1568 name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
1569 }
1570 if (!name) {
1571 dev_err(&client->dev, "failed to allocate device name\n");
1572 ret = -ENOMEM;
1573 goto error_1;
1574 }
1575
1576 bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
1577 if (!bq) {
1578 ret = -ENOMEM;
1579 goto error_2;
1580 }
1581
1582 i2c_set_clientdata(client, bq);
1583
1584 bq->id = num;
1585 bq->dev = &client->dev;
1586 if (id)
1587 bq->chip = id->driver_data;
1588 else if (ACPI_HANDLE(bq->dev))
1589 bq->chip = acpi_id->driver_data;
1590 bq->name = name;
1591 bq->mode = BQ2415X_MODE_OFF;
1592 bq->reported_mode = BQ2415X_MODE_OFF;
1593 bq->autotimer = 0;
1594 bq->automode = 0;
1595
1596 if (np || ACPI_HANDLE(bq->dev)) {
1597 ret = device_property_read_u32(bq->dev,
1598 "ti,current-limit",
1599 &bq->init_data.current_limit);
1600 if (ret)
1601 goto error_2;
1602 ret = device_property_read_u32(bq->dev,
1603 "ti,weak-battery-voltage",
1604 &bq->init_data.weak_battery_voltage);
1605 if (ret)
1606 goto error_2;
1607 ret = device_property_read_u32(bq->dev,
1608 "ti,battery-regulation-voltage",
1609 &bq->init_data.battery_regulation_voltage);
1610 if (ret)
1611 goto error_2;
1612 ret = device_property_read_u32(bq->dev,
1613 "ti,charge-current",
1614 &bq->init_data.charge_current);
1615 if (ret)
1616 goto error_2;
1617 ret = device_property_read_u32(bq->dev,
1618 "ti,termination-current",
1619 &bq->init_data.termination_current);
1620 if (ret)
1621 goto error_2;
1622 ret = device_property_read_u32(bq->dev,
1623 "ti,resistor-sense",
1624 &bq->init_data.resistor_sense);
1625 if (ret)
1626 goto error_2;
1627 if (np)
1628 bq->notify_node = of_parse_phandle(np,
1629 "ti,usb-charger-detection", 0);
1630 } else {
1631 memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
1632 }
1633
1634 bq2415x_reset_chip(bq);
1635
1636 ret = bq2415x_power_supply_init(bq);
1637 if (ret) {
1638 dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1639 goto error_2;
1640 }
1641
1642 ret = bq2415x_set_defaults(bq);
1643 if (ret) {
1644 dev_err(bq->dev, "failed to set default values: %d\n", ret);
1645 goto error_3;
1646 }
1647
1648 if (bq->notify_node || bq->init_data.notify_device) {
1649 bq->nb.notifier_call = bq2415x_notifier_call;
1650 ret = power_supply_reg_notifier(&bq->nb);
1651 if (ret) {
1652 dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
1653 goto error_3;
1654 }
1655
1656 bq->automode = 1;
1657 dev_info(bq->dev, "automode supported, waiting for events\n");
1658 } else {
1659 bq->automode = -1;
1660 dev_info(bq->dev, "automode not supported\n");
1661 }
1662
1663
1664 if (bq->nb.notifier_call) {
1665 if (np) {
1666 notify_psy = power_supply_get_by_phandle(np,
1667 "ti,usb-charger-detection");
1668 if (IS_ERR(notify_psy))
1669 notify_psy = NULL;
1670 } else if (bq->init_data.notify_device) {
1671 notify_psy = power_supply_get_by_name(
1672 bq->init_data.notify_device);
1673 }
1674 }
1675 if (notify_psy) {
1676 ret = power_supply_get_property(notify_psy,
1677 POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
1678 power_supply_put(notify_psy);
1679
1680 if (ret == 0) {
1681 bq2415x_update_reported_mode(bq, prop.intval);
1682 bq2415x_set_mode(bq, bq->reported_mode);
1683 }
1684 }
1685
1686 INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1687 bq2415x_set_autotimer(bq, 1);
1688
1689 dev_info(bq->dev, "driver registered\n");
1690 return 0;
1691
1692error_3:
1693 bq2415x_power_supply_exit(bq);
1694error_2:
1695 if (bq)
1696 of_node_put(bq->notify_node);
1697 kfree(name);
1698error_1:
1699 mutex_lock(&bq2415x_id_mutex);
1700 idr_remove(&bq2415x_id, num);
1701 mutex_unlock(&bq2415x_id_mutex);
1702
1703 return ret;
1704}
1705
1706
1707
1708static int bq2415x_remove(struct i2c_client *client)
1709{
1710 struct bq2415x_device *bq = i2c_get_clientdata(client);
1711
1712 if (bq->nb.notifier_call)
1713 power_supply_unreg_notifier(&bq->nb);
1714
1715 of_node_put(bq->notify_node);
1716 bq2415x_power_supply_exit(bq);
1717
1718 bq2415x_reset_chip(bq);
1719
1720 mutex_lock(&bq2415x_id_mutex);
1721 idr_remove(&bq2415x_id, bq->id);
1722 mutex_unlock(&bq2415x_id_mutex);
1723
1724 dev_info(bq->dev, "driver unregistered\n");
1725
1726 kfree(bq->name);
1727
1728 return 0;
1729}
1730
1731static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1732 { "bq2415x", BQUNKNOWN },
1733 { "bq24150", BQ24150 },
1734 { "bq24150a", BQ24150A },
1735 { "bq24151", BQ24151 },
1736 { "bq24151a", BQ24151A },
1737 { "bq24152", BQ24152 },
1738 { "bq24153", BQ24153 },
1739 { "bq24153a", BQ24153A },
1740 { "bq24155", BQ24155 },
1741 { "bq24156", BQ24156 },
1742 { "bq24156a", BQ24156A },
1743 { "bq24157s", BQ24157S },
1744 { "bq24158", BQ24158 },
1745 {},
1746};
1747MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1748
1749#ifdef CONFIG_ACPI
1750static const struct acpi_device_id bq2415x_i2c_acpi_match[] = {
1751 { "BQ2415X", BQUNKNOWN },
1752 { "BQ241500", BQ24150 },
1753 { "BQA24150", BQ24150A },
1754 { "BQ241510", BQ24151 },
1755 { "BQA24151", BQ24151A },
1756 { "BQ241520", BQ24152 },
1757 { "BQ241530", BQ24153 },
1758 { "BQA24153", BQ24153A },
1759 { "BQ241550", BQ24155 },
1760 { "BQ241560", BQ24156 },
1761 { "BQA24156", BQ24156A },
1762 { "BQS24157", BQ24157S },
1763 { "BQ241580", BQ24158 },
1764 {},
1765};
1766MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
1767#endif
1768
1769#ifdef CONFIG_OF
1770static const struct of_device_id bq2415x_of_match_table[] = {
1771 { .compatible = "ti,bq24150" },
1772 { .compatible = "ti,bq24150a" },
1773 { .compatible = "ti,bq24151" },
1774 { .compatible = "ti,bq24151a" },
1775 { .compatible = "ti,bq24152" },
1776 { .compatible = "ti,bq24153" },
1777 { .compatible = "ti,bq24153a" },
1778 { .compatible = "ti,bq24155" },
1779 { .compatible = "ti,bq24156" },
1780 { .compatible = "ti,bq24156a" },
1781 { .compatible = "ti,bq24157s" },
1782 { .compatible = "ti,bq24158" },
1783 {},
1784};
1785MODULE_DEVICE_TABLE(of, bq2415x_of_match_table);
1786#endif
1787
1788static struct i2c_driver bq2415x_driver = {
1789 .driver = {
1790 .name = "bq2415x-charger",
1791 .of_match_table = of_match_ptr(bq2415x_of_match_table),
1792 .acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
1793 },
1794 .probe = bq2415x_probe,
1795 .remove = bq2415x_remove,
1796 .id_table = bq2415x_i2c_id_table,
1797};
1798module_i2c_driver(bq2415x_driver);
1799
1800MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1801MODULE_DESCRIPTION("bq2415x charger driver");
1802MODULE_LICENSE("GPL");
1803
