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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * TI LP8788 MFD - battery charger driver
4 *
5 * Copyright 2012 Texas Instruments
6 *
7 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
8 */
9
10#include <linux/err.h>
11#include <linux/iio/consumer.h>
12#include <linux/interrupt.h>
13#include <linux/irqdomain.h>
14#include <linux/mfd/lp8788.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/power_supply.h>
18#include <linux/slab.h>
19#include <linux/workqueue.h>
20
21/* register address */
22#define LP8788_CHG_STATUS 0x07
23#define LP8788_CHG_IDCIN 0x13
24#define LP8788_CHG_IBATT 0x14
25#define LP8788_CHG_VTERM 0x15
26#define LP8788_CHG_EOC 0x16
27
28/* mask/shift bits */
29#define LP8788_CHG_INPUT_STATE_M 0x03 /* Addr 07h */
30#define LP8788_CHG_STATE_M 0x3C
31#define LP8788_CHG_STATE_S 2
32#define LP8788_NO_BATT_M BIT(6)
33#define LP8788_BAD_BATT_M BIT(7)
34#define LP8788_CHG_IBATT_M 0x1F /* Addr 14h */
35#define LP8788_CHG_VTERM_M 0x0F /* Addr 15h */
36#define LP8788_CHG_EOC_LEVEL_M 0x30 /* Addr 16h */
37#define LP8788_CHG_EOC_LEVEL_S 4
38#define LP8788_CHG_EOC_TIME_M 0x0E
39#define LP8788_CHG_EOC_TIME_S 1
40#define LP8788_CHG_EOC_MODE_M BIT(0)
41
42#define LP8788_CHARGER_NAME "charger"
43#define LP8788_BATTERY_NAME "main_batt"
44
45#define LP8788_CHG_START 0x11
46#define LP8788_CHG_END 0x1C
47
48#define LP8788_ISEL_MAX 23
49#define LP8788_ISEL_STEP 50
50#define LP8788_VTERM_MIN 4100
51#define LP8788_VTERM_STEP 25
52#define LP8788_MAX_BATT_CAPACITY 100
53#define LP8788_MAX_CHG_IRQS 11
54
55enum lp8788_charging_state {
56 LP8788_OFF,
57 LP8788_WARM_UP,
58 LP8788_LOW_INPUT = 0x3,
59 LP8788_PRECHARGE,
60 LP8788_CC,
61 LP8788_CV,
62 LP8788_MAINTENANCE,
63 LP8788_BATTERY_FAULT,
64 LP8788_SYSTEM_SUPPORT = 0xC,
65 LP8788_HIGH_CURRENT = 0xF,
66 LP8788_MAX_CHG_STATE,
67};
68
69enum lp8788_charger_adc_sel {
70 LP8788_VBATT,
71 LP8788_BATT_TEMP,
72 LP8788_NUM_CHG_ADC,
73};
74
75enum lp8788_charger_input_state {
76 LP8788_SYSTEM_SUPPLY = 1,
77 LP8788_FULL_FUNCTION,
78};
79
80/*
81 * struct lp8788_chg_irq
82 * @which : lp8788 interrupt id
83 * @virq : Linux IRQ number from irq_domain
84 */
85struct lp8788_chg_irq {
86 enum lp8788_int_id which;
87 int virq;
88};
89
90/*
91 * struct lp8788_charger
92 * @lp : used for accessing the registers of mfd lp8788 device
93 * @charger : power supply driver for the battery charger
94 * @battery : power supply driver for the battery
95 * @charger_work : work queue for charger input interrupts
96 * @chan : iio channels for getting adc values
97 * eg) battery voltage, capacity and temperature
98 * @irqs : charger dedicated interrupts
99 * @num_irqs : total numbers of charger interrupts
100 * @pdata : charger platform specific data
101 */
102struct lp8788_charger {
103 struct lp8788 *lp;
104 struct power_supply *charger;
105 struct power_supply *battery;
106 struct work_struct charger_work;
107 struct iio_channel *chan[LP8788_NUM_CHG_ADC];
108 struct lp8788_chg_irq irqs[LP8788_MAX_CHG_IRQS];
109 int num_irqs;
110 struct lp8788_charger_platform_data *pdata;
111};
112
113static char *battery_supplied_to[] = {
114 LP8788_BATTERY_NAME,
115};
116
117static enum power_supply_property lp8788_charger_prop[] = {
118 POWER_SUPPLY_PROP_ONLINE,
119 POWER_SUPPLY_PROP_CURRENT_MAX,
120};
121
122static enum power_supply_property lp8788_battery_prop[] = {
123 POWER_SUPPLY_PROP_STATUS,
124 POWER_SUPPLY_PROP_HEALTH,
125 POWER_SUPPLY_PROP_PRESENT,
126 POWER_SUPPLY_PROP_VOLTAGE_NOW,
127 POWER_SUPPLY_PROP_CAPACITY,
128 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
129 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
130 POWER_SUPPLY_PROP_TEMP,
131};
132
133static bool lp8788_is_charger_detected(struct lp8788_charger *pchg)
134{
135 u8 data;
136
137 lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
138 data &= LP8788_CHG_INPUT_STATE_M;
139
140 return data == LP8788_SYSTEM_SUPPLY || data == LP8788_FULL_FUNCTION;
141}
142
143static int lp8788_charger_get_property(struct power_supply *psy,
144 enum power_supply_property psp,
145 union power_supply_propval *val)
146{
147 struct lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent);
148 u8 read;
149
150 switch (psp) {
151 case POWER_SUPPLY_PROP_ONLINE:
152 val->intval = lp8788_is_charger_detected(pchg);
153 break;
154 case POWER_SUPPLY_PROP_CURRENT_MAX:
155 lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &read);
156 val->intval = LP8788_ISEL_STEP *
157 (min_t(int, read, LP8788_ISEL_MAX) + 1);
158 break;
159 default:
160 return -EINVAL;
161 }
162
163 return 0;
164}
165
166static int lp8788_get_battery_status(struct lp8788_charger *pchg,
167 union power_supply_propval *val)
168{
169 enum lp8788_charging_state state;
170 u8 data;
171 int ret;
172
173 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
174 if (ret)
175 return ret;
176
177 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
178 switch (state) {
179 case LP8788_OFF:
180 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
181 break;
182 case LP8788_PRECHARGE:
183 case LP8788_CC:
184 case LP8788_CV:
185 case LP8788_HIGH_CURRENT:
186 val->intval = POWER_SUPPLY_STATUS_CHARGING;
187 break;
188 case LP8788_MAINTENANCE:
189 val->intval = POWER_SUPPLY_STATUS_FULL;
190 break;
191 default:
192 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
193 break;
194 }
195
196 return 0;
197}
198
199static int lp8788_get_battery_health(struct lp8788_charger *pchg,
200 union power_supply_propval *val)
201{
202 u8 data;
203 int ret;
204
205 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
206 if (ret)
207 return ret;
208
209 if (data & LP8788_NO_BATT_M)
210 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
211 else if (data & LP8788_BAD_BATT_M)
212 val->intval = POWER_SUPPLY_HEALTH_DEAD;
213 else
214 val->intval = POWER_SUPPLY_HEALTH_GOOD;
215
216 return 0;
217}
218
219static int lp8788_get_battery_present(struct lp8788_charger *pchg,
220 union power_supply_propval *val)
221{
222 u8 data;
223 int ret;
224
225 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
226 if (ret)
227 return ret;
228
229 val->intval = !(data & LP8788_NO_BATT_M);
230 return 0;
231}
232
233static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg, int *result)
234{
235 struct iio_channel *channel = pchg->chan[LP8788_VBATT];
236
237 if (!channel)
238 return -EINVAL;
239
240 return iio_read_channel_processed(channel, result);
241}
242
243static int lp8788_get_battery_voltage(struct lp8788_charger *pchg,
244 union power_supply_propval *val)
245{
246 return lp8788_get_vbatt_adc(pchg, &val->intval);
247}
248
249static int lp8788_get_battery_capacity(struct lp8788_charger *pchg,
250 union power_supply_propval *val)
251{
252 struct lp8788 *lp = pchg->lp;
253 struct lp8788_charger_platform_data *pdata = pchg->pdata;
254 unsigned int max_vbatt;
255 int vbatt;
256 enum lp8788_charging_state state;
257 u8 data;
258 int ret;
259
260 if (!pdata)
261 return -EINVAL;
262
263 max_vbatt = pdata->max_vbatt_mv;
264 if (max_vbatt == 0)
265 return -EINVAL;
266
267 ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data);
268 if (ret)
269 return ret;
270
271 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
272
273 if (state == LP8788_MAINTENANCE) {
274 val->intval = LP8788_MAX_BATT_CAPACITY;
275 } else {
276 ret = lp8788_get_vbatt_adc(pchg, &vbatt);
277 if (ret)
278 return ret;
279
280 val->intval = (vbatt * LP8788_MAX_BATT_CAPACITY) / max_vbatt;
281 val->intval = min(val->intval, LP8788_MAX_BATT_CAPACITY);
282 }
283
284 return 0;
285}
286
287static int lp8788_get_battery_temperature(struct lp8788_charger *pchg,
288 union power_supply_propval *val)
289{
290 struct iio_channel *channel = pchg->chan[LP8788_BATT_TEMP];
291 int result;
292 int ret;
293
294 if (!channel)
295 return -EINVAL;
296
297 ret = iio_read_channel_processed(channel, &result);
298 if (ret < 0)
299 return -EINVAL;
300
301 /* unit: 0.1 'C */
302 val->intval = result * 10;
303
304 return 0;
305}
306
307static int lp8788_get_battery_charging_current(struct lp8788_charger *pchg,
308 union power_supply_propval *val)
309{
310 u8 read;
311
312 lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &read);
313 read &= LP8788_CHG_IBATT_M;
314 val->intval = LP8788_ISEL_STEP *
315 (min_t(int, read, LP8788_ISEL_MAX) + 1);
316
317 return 0;
318}
319
320static int lp8788_get_charging_termination_voltage(struct lp8788_charger *pchg,
321 union power_supply_propval *val)
322{
323 u8 read;
324
325 lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &read);
326 read &= LP8788_CHG_VTERM_M;
327 val->intval = LP8788_VTERM_MIN + LP8788_VTERM_STEP * read;
328
329 return 0;
330}
331
332static int lp8788_battery_get_property(struct power_supply *psy,
333 enum power_supply_property psp,
334 union power_supply_propval *val)
335{
336 struct lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent);
337
338 switch (psp) {
339 case POWER_SUPPLY_PROP_STATUS:
340 return lp8788_get_battery_status(pchg, val);
341 case POWER_SUPPLY_PROP_HEALTH:
342 return lp8788_get_battery_health(pchg, val);
343 case POWER_SUPPLY_PROP_PRESENT:
344 return lp8788_get_battery_present(pchg, val);
345 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
346 return lp8788_get_battery_voltage(pchg, val);
347 case POWER_SUPPLY_PROP_CAPACITY:
348 return lp8788_get_battery_capacity(pchg, val);
349 case POWER_SUPPLY_PROP_TEMP:
350 return lp8788_get_battery_temperature(pchg, val);
351 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
352 return lp8788_get_battery_charging_current(pchg, val);
353 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
354 return lp8788_get_charging_termination_voltage(pchg, val);
355 default:
356 return -EINVAL;
357 }
358}
359
360static inline bool lp8788_is_valid_charger_register(u8 addr)
361{
362 return addr >= LP8788_CHG_START && addr <= LP8788_CHG_END;
363}
364
365static int lp8788_update_charger_params(struct platform_device *pdev,
366 struct lp8788_charger *pchg)
367{
368 struct lp8788 *lp = pchg->lp;
369 struct lp8788_charger_platform_data *pdata = pchg->pdata;
370 struct lp8788_chg_param *param;
371 int i;
372 int ret;
373
374 if (!pdata || !pdata->chg_params) {
375 dev_info(&pdev->dev, "skip updating charger parameters\n");
376 return 0;
377 }
378
379 /* setting charging parameters */
380 for (i = 0; i < pdata->num_chg_params; i++) {
381 param = pdata->chg_params + i;
382
383 if (lp8788_is_valid_charger_register(param->addr)) {
384 ret = lp8788_write_byte(lp, param->addr, param->val);
385 if (ret)
386 return ret;
387 }
388 }
389
390 return 0;
391}
392
393static const struct power_supply_desc lp8788_psy_charger_desc = {
394 .name = LP8788_CHARGER_NAME,
395 .type = POWER_SUPPLY_TYPE_MAINS,
396 .properties = lp8788_charger_prop,
397 .num_properties = ARRAY_SIZE(lp8788_charger_prop),
398 .get_property = lp8788_charger_get_property,
399};
400
401static const struct power_supply_desc lp8788_psy_battery_desc = {
402 .name = LP8788_BATTERY_NAME,
403 .type = POWER_SUPPLY_TYPE_BATTERY,
404 .properties = lp8788_battery_prop,
405 .num_properties = ARRAY_SIZE(lp8788_battery_prop),
406 .get_property = lp8788_battery_get_property,
407};
408
409static void lp8788_charger_event(struct work_struct *work)
410{
411 struct lp8788_charger *pchg =
412 container_of(work, struct lp8788_charger, charger_work);
413 struct lp8788_charger_platform_data *pdata = pchg->pdata;
414 enum lp8788_charger_event event = lp8788_is_charger_detected(pchg);
415
416 pdata->charger_event(pchg->lp, event);
417}
418
419static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id)
420{
421 bool found = false;
422 int i;
423
424 for (i = 0; i < pchg->num_irqs; i++) {
425 if (pchg->irqs[i].virq == virq) {
426 *id = pchg->irqs[i].which;
427 found = true;
428 break;
429 }
430 }
431
432 return found;
433}
434
435static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr)
436{
437 struct lp8788_charger *pchg = ptr;
438 struct lp8788_charger_platform_data *pdata = pchg->pdata;
439 int id = -1;
440
441 if (!lp8788_find_irq_id(pchg, virq, &id))
442 return IRQ_NONE;
443
444 switch (id) {
445 case LP8788_INT_CHG_INPUT_STATE:
446 case LP8788_INT_CHG_STATE:
447 case LP8788_INT_EOC:
448 case LP8788_INT_BATT_LOW:
449 case LP8788_INT_NO_BATT:
450 power_supply_changed(pchg->charger);
451 power_supply_changed(pchg->battery);
452 break;
453 default:
454 break;
455 }
456
457 /* report charger dectection event if used */
458 if (!pdata)
459 goto irq_handled;
460
461 if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE)
462 schedule_work(&pchg->charger_work);
463
464irq_handled:
465 return IRQ_HANDLED;
466}
467
468static int lp8788_set_irqs(struct platform_device *pdev,
469 struct lp8788_charger *pchg, const char *name)
470{
471 struct resource *r;
472 struct irq_domain *irqdm = pchg->lp->irqdm;
473 int irq_start;
474 int irq_end;
475 int virq;
476 int nr_irq;
477 int i;
478 int ret;
479
480 /* no error even if no irq resource */
481 r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name);
482 if (!r)
483 return 0;
484
485 irq_start = r->start;
486 irq_end = r->end;
487
488 for (i = irq_start; i <= irq_end; i++) {
489 nr_irq = pchg->num_irqs;
490
491 virq = irq_create_mapping(irqdm, i);
492 pchg->irqs[nr_irq].virq = virq;
493 pchg->irqs[nr_irq].which = i;
494 pchg->num_irqs++;
495
496 ret = request_threaded_irq(virq, NULL,
497 lp8788_charger_irq_thread,
498 IRQF_ONESHOT, name, pchg);
499 if (ret)
500 break;
501 }
502
503 if (i <= irq_end)
504 goto err_free_irq;
505
506 return 0;
507
508err_free_irq:
509 for (i = 0; i < pchg->num_irqs; i++)
510 free_irq(pchg->irqs[i].virq, pchg);
511 return ret;
512}
513
514static int lp8788_irq_register(struct platform_device *pdev,
515 struct lp8788_charger *pchg)
516{
517 static const char * const name[] = {
518 LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ
519 };
520 int i;
521 int ret;
522
523 INIT_WORK(&pchg->charger_work, lp8788_charger_event);
524 pchg->num_irqs = 0;
525
526 for (i = 0; i < ARRAY_SIZE(name); i++) {
527 ret = lp8788_set_irqs(pdev, pchg, name[i]);
528 if (ret) {
529 dev_warn(&pdev->dev, "irq setup failed: %s\n", name[i]);
530 return ret;
531 }
532 }
533
534 if (pchg->num_irqs > LP8788_MAX_CHG_IRQS) {
535 dev_err(&pdev->dev, "invalid total number of irqs: %d\n",
536 pchg->num_irqs);
537 return -EINVAL;
538 }
539
540
541 return 0;
542}
543
544static void lp8788_irq_unregister(struct platform_device *pdev,
545 struct lp8788_charger *pchg)
546{
547 int i;
548 int irq;
549
550 for (i = 0; i < pchg->num_irqs; i++) {
551 irq = pchg->irqs[i].virq;
552 if (!irq)
553 continue;
554
555 free_irq(irq, pchg);
556 }
557}
558
559static void lp8788_setup_adc_channel(struct device *dev,
560 struct lp8788_charger *pchg)
561{
562 struct lp8788_charger_platform_data *pdata = pchg->pdata;
563 struct iio_channel *chan;
564
565 if (!pdata)
566 return;
567
568 /* ADC channel for battery voltage */
569 chan = devm_iio_channel_get(dev, pdata->adc_vbatt);
570 pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;
571
572 /* ADC channel for battery temperature */
573 chan = devm_iio_channel_get(dev, pdata->adc_batt_temp);
574 pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
575}
576
577static ssize_t lp8788_show_charger_status(struct device *dev,
578 struct device_attribute *attr, char *buf)
579{
580 struct lp8788_charger *pchg = dev_get_drvdata(dev);
581 enum lp8788_charging_state state;
582 static const char * const desc[LP8788_MAX_CHG_STATE] = {
583 [LP8788_OFF] = "CHARGER OFF",
584 [LP8788_WARM_UP] = "WARM UP",
585 [LP8788_LOW_INPUT] = "LOW INPUT STATE",
586 [LP8788_PRECHARGE] = "CHARGING - PRECHARGE",
587 [LP8788_CC] = "CHARGING - CC",
588 [LP8788_CV] = "CHARGING - CV",
589 [LP8788_MAINTENANCE] = "NO CHARGING - MAINTENANCE",
590 [LP8788_BATTERY_FAULT] = "BATTERY FAULT",
591 [LP8788_SYSTEM_SUPPORT] = "SYSTEM SUPPORT",
592 [LP8788_HIGH_CURRENT] = "HIGH CURRENT",
593 };
594 u8 data;
595
596 lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
597 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
598
599 return sysfs_emit(buf, "%s\n", desc[state]);
600}
601
602static ssize_t lp8788_show_eoc_time(struct device *dev,
603 struct device_attribute *attr, char *buf)
604{
605 struct lp8788_charger *pchg = dev_get_drvdata(dev);
606 static const char * const stime[] = {
607 "400ms", "5min", "10min", "15min",
608 "20min", "25min", "30min", "No timeout"
609 };
610 u8 val;
611
612 lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
613 val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S;
614
615 return sysfs_emit(buf, "End Of Charge Time: %s\n", stime[val]);
616}
617
618static ssize_t lp8788_show_eoc_level(struct device *dev,
619 struct device_attribute *attr, char *buf)
620{
621 struct lp8788_charger *pchg = dev_get_drvdata(dev);
622 static const char * const abs_level[] = {
623 "25mA", "49mA", "75mA", "98mA"
624 };
625 static const char * const relative_level[] = {
626 "5%", "10%", "15%", "20%"
627 };
628 const char *level;
629 u8 val;
630 u8 mode;
631
632 lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
633
634 mode = val & LP8788_CHG_EOC_MODE_M;
635 val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S;
636 level = mode ? abs_level[val] : relative_level[val];
637
638 return sysfs_emit(buf, "End Of Charge Level: %s\n", level);
639}
640
641static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL);
642static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL);
643static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL);
644
645static struct attribute *lp8788_charger_sysfs_attrs[] = {
646 &dev_attr_charger_status.attr,
647 &dev_attr_eoc_time.attr,
648 &dev_attr_eoc_level.attr,
649 NULL,
650};
651
652ATTRIBUTE_GROUPS(lp8788_charger_sysfs);
653
654static int lp8788_psy_register(struct platform_device *pdev,
655 struct lp8788_charger *pchg)
656{
657 struct power_supply_config charger_cfg = {};
658
659 charger_cfg.attr_grp = lp8788_charger_sysfs_groups;
660 charger_cfg.supplied_to = battery_supplied_to;
661 charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
662
663 pchg->charger = devm_power_supply_register(&pdev->dev,
664 &lp8788_psy_charger_desc,
665 &charger_cfg);
666 if (IS_ERR(pchg->charger))
667 return -EPERM;
668
669 pchg->battery = devm_power_supply_register(&pdev->dev,
670 &lp8788_psy_battery_desc, NULL);
671 if (IS_ERR(pchg->battery))
672 return -EPERM;
673
674 return 0;
675}
676
677static int lp8788_charger_probe(struct platform_device *pdev)
678{
679 struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
680 struct lp8788_charger *pchg;
681 struct device *dev = &pdev->dev;
682 int ret;
683
684 pchg = devm_kzalloc(dev, sizeof(struct lp8788_charger), GFP_KERNEL);
685 if (!pchg)
686 return -ENOMEM;
687
688 pchg->lp = lp;
689 pchg->pdata = lp->pdata ? lp->pdata->chg_pdata : NULL;
690 platform_set_drvdata(pdev, pchg);
691
692 ret = lp8788_update_charger_params(pdev, pchg);
693 if (ret)
694 return ret;
695
696 lp8788_setup_adc_channel(&pdev->dev, pchg);
697
698 ret = lp8788_psy_register(pdev, pchg);
699 if (ret)
700 return ret;
701
702 ret = lp8788_irq_register(pdev, pchg);
703 if (ret)
704 dev_warn(dev, "failed to register charger irq: %d\n", ret);
705
706 return 0;
707}
708
709static void lp8788_charger_remove(struct platform_device *pdev)
710{
711 struct lp8788_charger *pchg = platform_get_drvdata(pdev);
712
713 flush_work(&pchg->charger_work);
714 lp8788_irq_unregister(pdev, pchg);
715}
716
717static struct platform_driver lp8788_charger_driver = {
718 .probe = lp8788_charger_probe,
719 .remove = lp8788_charger_remove,
720 .driver = {
721 .name = LP8788_DEV_CHARGER,
722 },
723};
724module_platform_driver(lp8788_charger_driver);
725
726MODULE_DESCRIPTION("TI LP8788 Charger Driver");
727MODULE_AUTHOR("Milo Kim");
728MODULE_LICENSE("GPL");
729MODULE_ALIAS("platform:lp8788-charger");