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12#include <linux/bits.h>
13#include <linux/delay.h>
14#include <linux/i2c.h>
15#include <linux/gfp.h>
16#include <linux/gpio/consumer.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/power_supply.h>
20#include <linux/property.h>
21#include <linux/regmap.h>
22#include <linux/time.h>
23#include <linux/workqueue.h>
24
25#define CW2015_SIZE_BATINFO 64
26
27#define CW2015_RESET_TRIES 5
28
29#define CW2015_REG_VERSION 0x00
30#define CW2015_REG_VCELL 0x02
31#define CW2015_REG_SOC 0x04
32#define CW2015_REG_RRT_ALERT 0x06
33#define CW2015_REG_CONFIG 0x08
34#define CW2015_REG_MODE 0x0A
35#define CW2015_REG_BATINFO 0x10
36
37#define CW2015_MODE_SLEEP_MASK GENMASK(7, 6)
38#define CW2015_MODE_SLEEP (0x03 << 6)
39#define CW2015_MODE_NORMAL (0x00 << 6)
40#define CW2015_MODE_QUICK_START (0x03 << 4)
41#define CW2015_MODE_RESTART (0x0f << 0)
42
43#define CW2015_CONFIG_UPDATE_FLG (0x01 << 1)
44#define CW2015_ATHD(x) ((x) << 3)
45#define CW2015_MASK_ATHD GENMASK(7, 3)
46#define CW2015_MASK_SOC GENMASK(12, 0)
47
48
49#define CW2015_BAT_SOC_ERROR_MS (40 * MSEC_PER_SEC)
50
51#define CW2015_BAT_CHARGING_STUCK_MS (1800 * MSEC_PER_SEC)
52
53
54#define CW2015_DEFAULT_POLL_INTERVAL_MS 8000
55
56#define CW2015_AVERAGING_SAMPLES 3
57
58struct cw_battery {
59 struct device *dev;
60 struct workqueue_struct *battery_workqueue;
61 struct delayed_work battery_delay_work;
62 struct regmap *regmap;
63 struct power_supply *rk_bat;
64 struct power_supply_battery_info battery;
65 u8 *bat_profile;
66
67 bool charger_attached;
68 bool battery_changed;
69
70 int soc;
71 int voltage_mv;
72 int status;
73 int time_to_empty;
74 int charge_count;
75
76 u32 poll_interval_ms;
77 u8 alert_level;
78
79 unsigned int read_errors;
80 unsigned int charge_stuck_cnt;
81};
82
83static int cw_read_word(struct cw_battery *cw_bat, u8 reg, u16 *val)
84{
85 __be16 value;
86 int ret;
87
88 ret = regmap_bulk_read(cw_bat->regmap, reg, &value, sizeof(value));
89 if (ret)
90 return ret;
91
92 *val = be16_to_cpu(value);
93 return 0;
94}
95
96static int cw_update_profile(struct cw_battery *cw_bat)
97{
98 int ret;
99 unsigned int reg_val;
100 u8 reset_val;
101
102
103 ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val);
104 if (ret)
105 return ret;
106
107 reset_val = reg_val;
108 if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
109 dev_err(cw_bat->dev,
110 "Gauge is in sleep mode, can't update battery info\n");
111 return -EINVAL;
112 }
113
114
115 ret = regmap_raw_write(cw_bat->regmap, CW2015_REG_BATINFO,
116 cw_bat->bat_profile,
117 CW2015_SIZE_BATINFO);
118 if (ret)
119 return ret;
120
121
122 reg_val |= CW2015_CONFIG_UPDATE_FLG;
123 reg_val &= ~CW2015_MASK_ATHD;
124 reg_val |= CW2015_ATHD(cw_bat->alert_level);
125 ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val);
126 if (ret)
127 return ret;
128
129
130 reset_val &= ~CW2015_MODE_RESTART;
131 reg_val = reset_val | CW2015_MODE_RESTART;
132 ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
133 if (ret)
134 return ret;
135
136
137 msleep(20);
138
139
140 ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
141 if (ret)
142 return ret;
143
144
145 ret = regmap_read_poll_timeout(cw_bat->regmap, CW2015_REG_SOC,
146 reg_val, reg_val <= 100,
147 10 * USEC_PER_MSEC, 10 * USEC_PER_SEC);
148 if (ret)
149 dev_err(cw_bat->dev,
150 "Gauge did not become ready after profile upload\n");
151 else
152 dev_dbg(cw_bat->dev, "Battery profile updated\n");
153
154 return ret;
155}
156
157static int cw_init(struct cw_battery *cw_bat)
158{
159 int ret;
160 unsigned int reg_val = CW2015_MODE_SLEEP;
161
162 if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
163 reg_val = CW2015_MODE_NORMAL;
164 ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
165 if (ret)
166 return ret;
167 }
168
169 ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val);
170 if (ret)
171 return ret;
172
173 if ((reg_val & CW2015_MASK_ATHD) != CW2015_ATHD(cw_bat->alert_level)) {
174 dev_dbg(cw_bat->dev, "Setting new alert level\n");
175 reg_val &= ~CW2015_MASK_ATHD;
176 reg_val |= ~CW2015_ATHD(cw_bat->alert_level);
177 ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val);
178 if (ret)
179 return ret;
180 }
181
182 ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val);
183 if (ret)
184 return ret;
185
186 if (!(reg_val & CW2015_CONFIG_UPDATE_FLG)) {
187 dev_dbg(cw_bat->dev,
188 "Battery profile not present, uploading battery profile\n");
189 if (cw_bat->bat_profile) {
190 ret = cw_update_profile(cw_bat);
191 if (ret) {
192 dev_err(cw_bat->dev,
193 "Failed to upload battery profile\n");
194 return ret;
195 }
196 } else {
197 dev_warn(cw_bat->dev,
198 "No profile specified, continuing without profile\n");
199 }
200 } else if (cw_bat->bat_profile) {
201 u8 bat_info[CW2015_SIZE_BATINFO];
202
203 ret = regmap_raw_read(cw_bat->regmap, CW2015_REG_BATINFO,
204 bat_info, CW2015_SIZE_BATINFO);
205 if (ret) {
206 dev_err(cw_bat->dev,
207 "Failed to read stored battery profile\n");
208 return ret;
209 }
210
211 if (memcmp(bat_info, cw_bat->bat_profile, CW2015_SIZE_BATINFO)) {
212 dev_warn(cw_bat->dev, "Replacing stored battery profile\n");
213 ret = cw_update_profile(cw_bat);
214 if (ret)
215 return ret;
216 }
217 } else {
218 dev_warn(cw_bat->dev,
219 "Can't check current battery profile, no profile provided\n");
220 }
221
222 dev_dbg(cw_bat->dev, "Battery profile configured\n");
223 return 0;
224}
225
226static int cw_power_on_reset(struct cw_battery *cw_bat)
227{
228 int ret;
229 unsigned char reset_val;
230
231 reset_val = CW2015_MODE_SLEEP;
232 ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
233 if (ret)
234 return ret;
235
236
237 msleep(20);
238
239 reset_val = CW2015_MODE_NORMAL;
240 ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
241 if (ret)
242 return ret;
243
244 ret = cw_init(cw_bat);
245 if (ret)
246 return ret;
247 return 0;
248}
249
250#define HYSTERESIS(current, previous, up, down) \
251 (((current) < (previous) + (up)) && ((current) > (previous) - (down)))
252
253static int cw_get_soc(struct cw_battery *cw_bat)
254{
255 unsigned int soc;
256 int ret;
257
258 ret = regmap_read(cw_bat->regmap, CW2015_REG_SOC, &soc);
259 if (ret)
260 return ret;
261
262 if (soc > 100) {
263 int max_error_cycles =
264 CW2015_BAT_SOC_ERROR_MS / cw_bat->poll_interval_ms;
265
266 dev_err(cw_bat->dev, "Invalid SoC %d%%\n", soc);
267 cw_bat->read_errors++;
268 if (cw_bat->read_errors > max_error_cycles) {
269 dev_warn(cw_bat->dev,
270 "Too many invalid SoC reports, resetting gauge\n");
271 cw_power_on_reset(cw_bat);
272 cw_bat->read_errors = 0;
273 }
274 return cw_bat->soc;
275 }
276 cw_bat->read_errors = 0;
277
278
279 if (cw_bat->status == POWER_SUPPLY_STATUS_CHARGING && soc == cw_bat->soc) {
280 int max_stuck_cycles =
281 CW2015_BAT_CHARGING_STUCK_MS / cw_bat->poll_interval_ms;
282
283 cw_bat->charge_stuck_cnt++;
284 if (cw_bat->charge_stuck_cnt > max_stuck_cycles) {
285 dev_warn(cw_bat->dev,
286 "SoC stuck @%u%%, resetting gauge\n", soc);
287 cw_power_on_reset(cw_bat);
288 cw_bat->charge_stuck_cnt = 0;
289 }
290 } else {
291 cw_bat->charge_stuck_cnt = 0;
292 }
293
294
295 if (cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 0, 3))
296 soc = cw_bat->soc;
297
298
299 if (!cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 3, 0))
300 soc = cw_bat->soc;
301
302 return soc;
303}
304
305static int cw_get_voltage(struct cw_battery *cw_bat)
306{
307 int ret, i, voltage_mv;
308 u16 reg_val;
309 u32 avg = 0;
310
311 for (i = 0; i < CW2015_AVERAGING_SAMPLES; i++) {
312 ret = cw_read_word(cw_bat, CW2015_REG_VCELL, ®_val);
313 if (ret)
314 return ret;
315
316 avg += reg_val;
317 }
318 avg /= CW2015_AVERAGING_SAMPLES;
319
320
321
322
323
324
325 voltage_mv = avg * 312 / 1024;
326
327 dev_dbg(cw_bat->dev, "Read voltage: %d mV, raw=0x%04x\n",
328 voltage_mv, reg_val);
329 return voltage_mv;
330}
331
332static int cw_get_time_to_empty(struct cw_battery *cw_bat)
333{
334 int ret;
335 u16 value16;
336
337 ret = cw_read_word(cw_bat, CW2015_REG_RRT_ALERT, &value16);
338 if (ret)
339 return ret;
340
341 return value16 & CW2015_MASK_SOC;
342}
343
344static void cw_update_charge_status(struct cw_battery *cw_bat)
345{
346 int ret;
347
348 ret = power_supply_am_i_supplied(cw_bat->rk_bat);
349 if (ret < 0) {
350 dev_warn(cw_bat->dev, "Failed to get supply state: %d\n", ret);
351 } else {
352 bool charger_attached;
353
354 charger_attached = !!ret;
355 if (cw_bat->charger_attached != charger_attached) {
356 cw_bat->battery_changed = true;
357 if (charger_attached)
358 cw_bat->charge_count++;
359 }
360 cw_bat->charger_attached = charger_attached;
361 }
362}
363
364static void cw_update_soc(struct cw_battery *cw_bat)
365{
366 int soc;
367
368 soc = cw_get_soc(cw_bat);
369 if (soc < 0)
370 dev_err(cw_bat->dev, "Failed to get SoC from gauge: %d\n", soc);
371 else if (cw_bat->soc != soc) {
372 cw_bat->soc = soc;
373 cw_bat->battery_changed = true;
374 }
375}
376
377static void cw_update_voltage(struct cw_battery *cw_bat)
378{
379 int voltage_mv;
380
381 voltage_mv = cw_get_voltage(cw_bat);
382 if (voltage_mv < 0)
383 dev_err(cw_bat->dev, "Failed to get voltage from gauge: %d\n",
384 voltage_mv);
385 else
386 cw_bat->voltage_mv = voltage_mv;
387}
388
389static void cw_update_status(struct cw_battery *cw_bat)
390{
391 int status = POWER_SUPPLY_STATUS_DISCHARGING;
392
393 if (cw_bat->charger_attached) {
394 if (cw_bat->soc >= 100)
395 status = POWER_SUPPLY_STATUS_FULL;
396 else
397 status = POWER_SUPPLY_STATUS_CHARGING;
398 }
399
400 if (cw_bat->status != status)
401 cw_bat->battery_changed = true;
402 cw_bat->status = status;
403}
404
405static void cw_update_time_to_empty(struct cw_battery *cw_bat)
406{
407 int time_to_empty;
408
409 time_to_empty = cw_get_time_to_empty(cw_bat);
410 if (time_to_empty < 0)
411 dev_err(cw_bat->dev, "Failed to get time to empty from gauge: %d\n",
412 time_to_empty);
413 else if (cw_bat->time_to_empty != time_to_empty) {
414 cw_bat->time_to_empty = time_to_empty;
415 cw_bat->battery_changed = true;
416 }
417}
418
419static void cw_bat_work(struct work_struct *work)
420{
421 struct delayed_work *delay_work;
422 struct cw_battery *cw_bat;
423 int ret;
424 unsigned int reg_val;
425
426 delay_work = to_delayed_work(work);
427 cw_bat = container_of(delay_work, struct cw_battery, battery_delay_work);
428 ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val);
429 if (ret) {
430 dev_err(cw_bat->dev, "Failed to read mode from gauge: %d\n", ret);
431 } else {
432 if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
433 int i;
434
435 for (i = 0; i < CW2015_RESET_TRIES; i++) {
436 if (!cw_power_on_reset(cw_bat))
437 break;
438 }
439 }
440 cw_update_soc(cw_bat);
441 cw_update_voltage(cw_bat);
442 cw_update_charge_status(cw_bat);
443 cw_update_status(cw_bat);
444 cw_update_time_to_empty(cw_bat);
445 }
446 dev_dbg(cw_bat->dev, "charger_attached = %d\n", cw_bat->charger_attached);
447 dev_dbg(cw_bat->dev, "status = %d\n", cw_bat->status);
448 dev_dbg(cw_bat->dev, "soc = %d%%\n", cw_bat->soc);
449 dev_dbg(cw_bat->dev, "voltage = %dmV\n", cw_bat->voltage_mv);
450
451 if (cw_bat->battery_changed)
452 power_supply_changed(cw_bat->rk_bat);
453 cw_bat->battery_changed = false;
454
455 queue_delayed_work(cw_bat->battery_workqueue,
456 &cw_bat->battery_delay_work,
457 msecs_to_jiffies(cw_bat->poll_interval_ms));
458}
459
460static bool cw_battery_valid_time_to_empty(struct cw_battery *cw_bat)
461{
462 return cw_bat->time_to_empty > 0 &&
463 cw_bat->time_to_empty < CW2015_MASK_SOC &&
464 cw_bat->status == POWER_SUPPLY_STATUS_DISCHARGING;
465}
466
467static int cw_battery_get_property(struct power_supply *psy,
468 enum power_supply_property psp,
469 union power_supply_propval *val)
470{
471 struct cw_battery *cw_bat;
472
473 cw_bat = power_supply_get_drvdata(psy);
474 switch (psp) {
475 case POWER_SUPPLY_PROP_CAPACITY:
476 val->intval = cw_bat->soc;
477 break;
478
479 case POWER_SUPPLY_PROP_STATUS:
480 val->intval = cw_bat->status;
481 break;
482
483 case POWER_SUPPLY_PROP_PRESENT:
484 val->intval = !!cw_bat->voltage_mv;
485 break;
486
487 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
488 val->intval = cw_bat->voltage_mv * 1000;
489 break;
490
491 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
492 if (cw_battery_valid_time_to_empty(cw_bat))
493 val->intval = cw_bat->time_to_empty;
494 else
495 val->intval = 0;
496 break;
497
498 case POWER_SUPPLY_PROP_TECHNOLOGY:
499 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
500 break;
501
502 case POWER_SUPPLY_PROP_CHARGE_COUNTER:
503 val->intval = cw_bat->charge_count;
504 break;
505
506 case POWER_SUPPLY_PROP_CHARGE_FULL:
507 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
508 if (cw_bat->battery.charge_full_design_uah > 0)
509 val->intval = cw_bat->battery.charge_full_design_uah;
510 else
511 val->intval = 0;
512 break;
513
514 case POWER_SUPPLY_PROP_CHARGE_NOW:
515 val->intval = cw_bat->battery.charge_full_design_uah;
516 val->intval = val->intval * cw_bat->soc / 100;
517 break;
518
519 case POWER_SUPPLY_PROP_CURRENT_NOW:
520 if (cw_battery_valid_time_to_empty(cw_bat) &&
521 cw_bat->battery.charge_full_design_uah > 0) {
522
523 val->intval = cw_bat->battery.charge_full_design_uah;
524 val->intval = val->intval * cw_bat->soc / 100;
525
526
527 val->intval = 60 * val->intval / cw_bat->time_to_empty;
528 } else {
529 val->intval = 0;
530 }
531
532 break;
533
534 default:
535 break;
536 }
537 return 0;
538}
539
540static enum power_supply_property cw_battery_properties[] = {
541 POWER_SUPPLY_PROP_CAPACITY,
542 POWER_SUPPLY_PROP_STATUS,
543 POWER_SUPPLY_PROP_PRESENT,
544 POWER_SUPPLY_PROP_VOLTAGE_NOW,
545 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
546 POWER_SUPPLY_PROP_TECHNOLOGY,
547 POWER_SUPPLY_PROP_CHARGE_COUNTER,
548 POWER_SUPPLY_PROP_CHARGE_FULL,
549 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
550 POWER_SUPPLY_PROP_CHARGE_NOW,
551 POWER_SUPPLY_PROP_CURRENT_NOW,
552};
553
554static const struct power_supply_desc cw2015_bat_desc = {
555 .name = "cw2015-battery",
556 .type = POWER_SUPPLY_TYPE_BATTERY,
557 .properties = cw_battery_properties,
558 .num_properties = ARRAY_SIZE(cw_battery_properties),
559 .get_property = cw_battery_get_property,
560};
561
562static int cw2015_parse_properties(struct cw_battery *cw_bat)
563{
564 struct device *dev = cw_bat->dev;
565 int length;
566 int ret;
567
568 length = device_property_count_u8(dev, "cellwise,battery-profile");
569 if (length < 0) {
570 dev_warn(cw_bat->dev,
571 "No battery-profile found, using current flash contents\n");
572 } else if (length != CW2015_SIZE_BATINFO) {
573 dev_err(cw_bat->dev, "battery-profile must be %d bytes\n",
574 CW2015_SIZE_BATINFO);
575 return -EINVAL;
576 } else {
577 cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL);
578 if (!cw_bat->bat_profile)
579 return -ENOMEM;
580
581 ret = device_property_read_u8_array(dev,
582 "cellwise,battery-profile",
583 cw_bat->bat_profile,
584 length);
585 if (ret)
586 return ret;
587 }
588
589 ret = device_property_read_u32(dev, "cellwise,monitor-interval-ms",
590 &cw_bat->poll_interval_ms);
591 if (ret) {
592 dev_dbg(cw_bat->dev, "Using default poll interval\n");
593 cw_bat->poll_interval_ms = CW2015_DEFAULT_POLL_INTERVAL_MS;
594 }
595
596 return 0;
597}
598
599static const struct regmap_range regmap_ranges_rd_yes[] = {
600 regmap_reg_range(CW2015_REG_VERSION, CW2015_REG_VERSION),
601 regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_CONFIG),
602 regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE),
603 regmap_reg_range(CW2015_REG_BATINFO,
604 CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1),
605};
606
607static const struct regmap_access_table regmap_rd_table = {
608 .yes_ranges = regmap_ranges_rd_yes,
609 .n_yes_ranges = 4,
610};
611
612static const struct regmap_range regmap_ranges_wr_yes[] = {
613 regmap_reg_range(CW2015_REG_RRT_ALERT, CW2015_REG_CONFIG),
614 regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE),
615 regmap_reg_range(CW2015_REG_BATINFO,
616 CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1),
617};
618
619static const struct regmap_access_table regmap_wr_table = {
620 .yes_ranges = regmap_ranges_wr_yes,
621 .n_yes_ranges = 3,
622};
623
624static const struct regmap_range regmap_ranges_vol_yes[] = {
625 regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_SOC + 1),
626};
627
628static const struct regmap_access_table regmap_vol_table = {
629 .yes_ranges = regmap_ranges_vol_yes,
630 .n_yes_ranges = 1,
631};
632
633static const struct regmap_config cw2015_regmap_config = {
634 .reg_bits = 8,
635 .val_bits = 8,
636 .rd_table = ®map_rd_table,
637 .wr_table = ®map_wr_table,
638 .volatile_table = ®map_vol_table,
639 .max_register = CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1,
640};
641
642static int cw_bat_probe(struct i2c_client *client)
643{
644 int ret;
645 struct cw_battery *cw_bat;
646 struct power_supply_config psy_cfg = { 0 };
647
648 cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL);
649 if (!cw_bat)
650 return -ENOMEM;
651
652 i2c_set_clientdata(client, cw_bat);
653 cw_bat->dev = &client->dev;
654 cw_bat->soc = 1;
655
656 ret = cw2015_parse_properties(cw_bat);
657 if (ret) {
658 dev_err(cw_bat->dev, "Failed to parse cw2015 properties\n");
659 return ret;
660 }
661
662 cw_bat->regmap = devm_regmap_init_i2c(client, &cw2015_regmap_config);
663 if (IS_ERR(cw_bat->regmap)) {
664 dev_err(cw_bat->dev, "Failed to allocate regmap: %ld\n",
665 PTR_ERR(cw_bat->regmap));
666 return PTR_ERR(cw_bat->regmap);
667 }
668
669 ret = cw_init(cw_bat);
670 if (ret) {
671 dev_err(cw_bat->dev, "Init failed: %d\n", ret);
672 return ret;
673 }
674
675 psy_cfg.drv_data = cw_bat;
676 psy_cfg.fwnode = dev_fwnode(cw_bat->dev);
677
678 cw_bat->rk_bat = devm_power_supply_register(&client->dev,
679 &cw2015_bat_desc,
680 &psy_cfg);
681 if (IS_ERR(cw_bat->rk_bat)) {
682
683 dev_err_probe(&client->dev, PTR_ERR(cw_bat->rk_bat),
684 "Failed to register power supply\n");
685 return PTR_ERR(cw_bat->rk_bat);
686 }
687
688 ret = power_supply_get_battery_info(cw_bat->rk_bat, &cw_bat->battery);
689 if (ret) {
690 dev_warn(cw_bat->dev,
691 "No monitored battery, some properties will be missing\n");
692 }
693
694 cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");
695 INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);
696 queue_delayed_work(cw_bat->battery_workqueue,
697 &cw_bat->battery_delay_work, msecs_to_jiffies(10));
698 return 0;
699}
700
701static int __maybe_unused cw_bat_suspend(struct device *dev)
702{
703 struct i2c_client *client = to_i2c_client(dev);
704 struct cw_battery *cw_bat = i2c_get_clientdata(client);
705
706 cancel_delayed_work_sync(&cw_bat->battery_delay_work);
707 return 0;
708}
709
710static int __maybe_unused cw_bat_resume(struct device *dev)
711{
712 struct i2c_client *client = to_i2c_client(dev);
713 struct cw_battery *cw_bat = i2c_get_clientdata(client);
714
715 queue_delayed_work(cw_bat->battery_workqueue,
716 &cw_bat->battery_delay_work, 0);
717 return 0;
718}
719
720static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume);
721
722static int cw_bat_remove(struct i2c_client *client)
723{
724 struct cw_battery *cw_bat = i2c_get_clientdata(client);
725
726 cancel_delayed_work_sync(&cw_bat->battery_delay_work);
727 power_supply_put_battery_info(cw_bat->rk_bat, &cw_bat->battery);
728 return 0;
729}
730
731static const struct i2c_device_id cw_bat_id_table[] = {
732 { "cw2015", 0 },
733 { }
734};
735
736static const struct of_device_id cw2015_of_match[] = {
737 { .compatible = "cellwise,cw2015" },
738 { }
739};
740MODULE_DEVICE_TABLE(of, cw2015_of_match);
741
742static struct i2c_driver cw_bat_driver = {
743 .driver = {
744 .name = "cw2015",
745 .of_match_table = cw2015_of_match,
746 .pm = &cw_bat_pm_ops,
747 },
748 .probe_new = cw_bat_probe,
749 .remove = cw_bat_remove,
750 .id_table = cw_bat_id_table,
751};
752
753module_i2c_driver(cw_bat_driver);
754
755MODULE_AUTHOR("xhc<xhc@rock-chips.com>");
756MODULE_AUTHOR("Tobias Schramm <t.schramm@manjaro.org>");
757MODULE_DESCRIPTION("cw2015/cw2013 battery driver");
758MODULE_LICENSE("GPL");
759
