1// SPDX-License-Identifier: GPL-2.0+
2//
3// max14577_charger.c - Battery charger driver for the Maxim 14577/77836
4//
5// Copyright (C) 2013,2014 Samsung Electronics
6// Krzysztof Kozlowski <krzk@kernel.org>
7
8#include <linux/module.h>
9#include <linux/platform_device.h>
10#include <linux/power_supply.h>
11#include <linux/mfd/max14577-private.h>
12#include <linux/mfd/max14577.h>
13
14struct max14577_charger {
15 struct device *dev;
16 struct max14577 *max14577;
17 struct power_supply *charger;
18
19 struct max14577_charger_platform_data *pdata;
20};
21
22/*
23 * Helper function for mapping values of STATUS2/CHGTYP register on max14577
24 * and max77836 chipsets to enum maxim_muic_charger_type.
25 */
26static enum max14577_muic_charger_type maxim_get_charger_type(
27 enum maxim_device_type dev_type, u8 val) {
28 switch (val) {
29 case MAX14577_CHARGER_TYPE_NONE:
30 case MAX14577_CHARGER_TYPE_USB:
31 case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
32 case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
33 case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
34 case MAX14577_CHARGER_TYPE_SPECIAL_1A:
35 return val;
36 case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
37 case MAX14577_CHARGER_TYPE_RESERVED:
38 if (dev_type == MAXIM_DEVICE_TYPE_MAX77836)
39 val |= 0x8;
40 return val;
41 default:
42 WARN_ONCE(1, "max14577: Unsupported chgtyp register value 0x%02x", val);
43 return val;
44 }
45}
46
47static int max14577_get_charger_state(struct max14577_charger *chg, int *val)
48{
49 struct regmap *rmap = chg->max14577->regmap;
50 int ret;
51 u8 reg_data;
52
53 /*
54 * Charging occurs only if:
55 * - CHGCTRL2/MBCHOSTEN == 1
56 * - STATUS2/CGMBC == 1
57 *
58 * TODO:
59 * - handle FULL after Top-off timer (EOC register may be off
60 * and the charger won't be charging although MBCHOSTEN is on)
61 * - handle properly dead-battery charging (respect timer)
62 * - handle timers (fast-charge and prequal) /MBCCHGERR/
63 */
64 ret = max14577_read_reg(map: rmap, reg: MAX14577_CHG_REG_CHG_CTRL2, dest: &reg_data);
65 if (ret < 0)
66 goto out;
67
68 if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) {
69 *val = POWER_SUPPLY_STATUS_DISCHARGING;
70 goto out;
71 }
72
73 ret = max14577_read_reg(map: rmap, reg: MAX14577_CHG_REG_STATUS3, dest: &reg_data);
74 if (ret < 0)
75 goto out;
76
77 if (reg_data & STATUS3_CGMBC_MASK) {
78 /* Charger or USB-cable is connected */
79 if (reg_data & STATUS3_EOC_MASK)
80 *val = POWER_SUPPLY_STATUS_FULL;
81 else
82 *val = POWER_SUPPLY_STATUS_CHARGING;
83 goto out;
84 }
85
86 *val = POWER_SUPPLY_STATUS_DISCHARGING;
87
88out:
89 return ret;
90}
91
92/*
93 * Supported charge types:
94 * - POWER_SUPPLY_CHARGE_TYPE_NONE
95 * - POWER_SUPPLY_CHARGE_TYPE_FAST
96 */
97static int max14577_get_charge_type(struct max14577_charger *chg, int *val)
98{
99 int ret, charging;
100
101 /*
102 * TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
103 * As spec says:
104 * [after reaching EOC interrupt]
105 * "When the battery is fully charged, the 30-minute (typ)
106 * top-off timer starts. The device continues to trickle
107 * charge the battery until the top-off timer runs out."
108 */
109 ret = max14577_get_charger_state(chg, val: &charging);
110 if (ret < 0)
111 return ret;
112
113 if (charging == POWER_SUPPLY_STATUS_CHARGING)
114 *val = POWER_SUPPLY_CHARGE_TYPE_FAST;
115 else
116 *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
117
118 return 0;
119}
120
121static int max14577_get_online(struct max14577_charger *chg, int *val)
122{
123 struct regmap *rmap = chg->max14577->regmap;
124 u8 reg_data;
125 int ret;
126 enum max14577_muic_charger_type chg_type;
127
128 ret = max14577_read_reg(map: rmap, reg: MAX14577_MUIC_REG_STATUS2, dest: &reg_data);
129 if (ret < 0)
130 return ret;
131
132 reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
133 chg_type = maxim_get_charger_type(dev_type: chg->max14577->dev_type, val: reg_data);
134 switch (chg_type) {
135 case MAX14577_CHARGER_TYPE_USB:
136 case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
137 case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
138 case MAX14577_CHARGER_TYPE_SPECIAL_1A:
139 case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
140 case MAX77836_CHARGER_TYPE_SPECIAL_BIAS:
141 *val = 1;
142 break;
143 case MAX14577_CHARGER_TYPE_NONE:
144 case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
145 case MAX14577_CHARGER_TYPE_RESERVED:
146 case MAX77836_CHARGER_TYPE_RESERVED:
147 default:
148 *val = 0;
149 }
150
151 return 0;
152}
153
154/*
155 * Supported health statuses:
156 * - POWER_SUPPLY_HEALTH_DEAD
157 * - POWER_SUPPLY_HEALTH_OVERVOLTAGE
158 * - POWER_SUPPLY_HEALTH_GOOD
159 */
160static int max14577_get_battery_health(struct max14577_charger *chg, int *val)
161{
162 struct regmap *rmap = chg->max14577->regmap;
163 int ret;
164 u8 reg_data;
165 enum max14577_muic_charger_type chg_type;
166
167 ret = max14577_read_reg(map: rmap, reg: MAX14577_MUIC_REG_STATUS2, dest: &reg_data);
168 if (ret < 0)
169 goto out;
170
171 reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
172 chg_type = maxim_get_charger_type(dev_type: chg->max14577->dev_type, val: reg_data);
173 if (chg_type == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
174 *val = POWER_SUPPLY_HEALTH_DEAD;
175 goto out;
176 }
177
178 ret = max14577_read_reg(map: rmap, reg: MAX14577_CHG_REG_STATUS3, dest: &reg_data);
179 if (ret < 0)
180 goto out;
181
182 if (reg_data & STATUS3_OVP_MASK) {
183 *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
184 goto out;
185 }
186
187 /* Not dead, not overvoltage */
188 *val = POWER_SUPPLY_HEALTH_GOOD;
189
190out:
191 return ret;
192}
193
194/*
195 * Always returns 1.
196 * The max14577 chip doesn't report any status of battery presence.
197 * Lets assume that it will always be used with some battery.
198 */
199static int max14577_get_present(struct max14577_charger *chg, int *val)
200{
201 *val = 1;
202
203 return 0;
204}
205
206static int max14577_set_fast_charge_timer(struct max14577_charger *chg,
207 unsigned long hours)
208{
209 u8 reg_data;
210
211 switch (hours) {
212 case 5 ... 7:
213 reg_data = hours - 3;
214 break;
215 case 0:
216 /* Disable */
217 reg_data = 0x7;
218 break;
219 default:
220 dev_err(chg->dev, "Wrong value for Fast-Charge Timer: %lu\n",
221 hours);
222 return -EINVAL;
223 }
224 reg_data <<= CHGCTRL1_TCHW_SHIFT;
225
226 return max14577_update_reg(map: chg->max14577->regmap,
227 reg: MAX14577_REG_CHGCTRL1, CHGCTRL1_TCHW_MASK, val: reg_data);
228}
229
230static int max14577_init_constant_voltage(struct max14577_charger *chg,
231 unsigned int uvolt)
232{
233 u8 reg_data;
234
235 if (uvolt < MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN ||
236 uvolt > MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
237 return -EINVAL;
238
239 if (uvolt == 4200000)
240 reg_data = 0x0;
241 else if (uvolt == MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
242 reg_data = 0x1f;
243 else if (uvolt <= 4280000) {
244 unsigned int val = uvolt;
245
246 val -= MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN;
247 val /= MAXIM_CHARGER_CONSTANT_VOLTAGE_STEP;
248 if (uvolt <= 4180000)
249 reg_data = 0x1 + val;
250 else
251 reg_data = val; /* Fix for gap between 4.18V and 4.22V */
252 } else
253 return -EINVAL;
254
255 reg_data <<= CHGCTRL3_MBCCVWRC_SHIFT;
256
257 return max14577_write_reg(map: chg->max14577->regmap,
258 reg: MAX14577_CHG_REG_CHG_CTRL3, value: reg_data);
259}
260
261static int max14577_init_eoc(struct max14577_charger *chg,
262 unsigned int uamp)
263{
264 unsigned int current_bits;
265 u8 reg_data;
266
267 switch (chg->max14577->dev_type) {
268 case MAXIM_DEVICE_TYPE_MAX77836:
269 if (uamp < 5000)
270 return -EINVAL; /* Requested current is too low */
271
272 if (uamp >= 7500 && uamp < 10000)
273 current_bits = 0x0;
274 else if (uamp <= 50000) {
275 /* <5000, 7499> and <10000, 50000> */
276 current_bits = uamp / 5000;
277 } else {
278 uamp = min(uamp, 100000U) - 50000U;
279 current_bits = 0xa + uamp / 10000;
280 }
281 break;
282
283 case MAXIM_DEVICE_TYPE_MAX14577:
284 default:
285 if (uamp < MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN)
286 return -EINVAL; /* Requested current is too low */
287
288 uamp = min(uamp, MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
289 uamp -= MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN;
290 current_bits = uamp / MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP;
291 break;
292 }
293
294 reg_data = current_bits << CHGCTRL5_EOCS_SHIFT;
295
296 return max14577_update_reg(map: chg->max14577->regmap,
297 reg: MAX14577_CHG_REG_CHG_CTRL5, CHGCTRL5_EOCS_MASK,
298 val: reg_data);
299}
300
301static int max14577_init_fast_charge(struct max14577_charger *chg,
302 unsigned int uamp)
303{
304 u8 reg_data;
305 int ret;
306 const struct maxim_charger_current *limits =
307 &maxim_charger_currents[chg->max14577->dev_type];
308
309 ret = maxim_charger_calc_reg_current(limits, min_ua: uamp, max_ua: uamp, dst: &reg_data);
310 if (ret) {
311 dev_err(chg->dev, "Wrong value for fast charge: %u\n", uamp);
312 return ret;
313 }
314
315 return max14577_update_reg(map: chg->max14577->regmap,
316 reg: MAX14577_CHG_REG_CHG_CTRL4,
317 CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
318 val: reg_data);
319}
320
321/*
322 * Sets charger registers to proper and safe default values.
323 * Some of these values are equal to defaults in MAX14577E
324 * data sheet but there are minor differences.
325 */
326static int max14577_charger_reg_init(struct max14577_charger *chg)
327{
328 struct regmap *rmap = chg->max14577->regmap;
329 u8 reg_data;
330 int ret;
331
332 /*
333 * Charger-Type Manual Detection, default off (set CHGTYPMAN to 0)
334 * Charger-Detection Enable, default on (set CHGDETEN to 1)
335 * Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit
336 */
337 reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT;
338 max14577_update_reg(map: rmap, reg: MAX14577_REG_CDETCTRL1,
339 CDETCTRL1_CHGDETEN_MASK | CDETCTRL1_CHGTYPMAN_MASK,
340 val: reg_data);
341
342 /*
343 * Wall-Adapter Rapid Charge, default on
344 * Battery-Charger, default on
345 */
346 reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT;
347 reg_data |= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT;
348 max14577_write_reg(map: rmap, reg: MAX14577_REG_CHGCTRL2, value: reg_data);
349
350 /* Auto Charging Stop, default off */
351 reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT;
352 max14577_write_reg(map: rmap, reg: MAX14577_REG_CHGCTRL6, value: reg_data);
353
354 ret = max14577_init_constant_voltage(chg, uvolt: chg->pdata->constant_uvolt);
355 if (ret)
356 return ret;
357
358 ret = max14577_init_eoc(chg, uamp: chg->pdata->eoc_uamp);
359 if (ret)
360 return ret;
361
362 ret = max14577_init_fast_charge(chg, uamp: chg->pdata->fast_charge_uamp);
363 if (ret)
364 return ret;
365
366 ret = max14577_set_fast_charge_timer(chg,
367 MAXIM_CHARGER_FAST_CHARGE_TIMER_DEFAULT);
368 if (ret)
369 return ret;
370
371 /* Initialize Overvoltage-Protection Threshold */
372 switch (chg->pdata->ovp_uvolt) {
373 case 7500000:
374 reg_data = 0x0;
375 break;
376 case 6000000:
377 case 6500000:
378 case 7000000:
379 reg_data = 0x1 + (chg->pdata->ovp_uvolt - 6000000) / 500000;
380 break;
381 default:
382 dev_err(chg->dev, "Wrong value for OVP: %u\n",
383 chg->pdata->ovp_uvolt);
384 return -EINVAL;
385 }
386 reg_data <<= CHGCTRL7_OTPCGHCVS_SHIFT;
387 max14577_write_reg(map: rmap, reg: MAX14577_REG_CHGCTRL7, value: reg_data);
388
389 return 0;
390}
391
392/* Support property from charger */
393static enum power_supply_property max14577_charger_props[] = {
394 POWER_SUPPLY_PROP_STATUS,
395 POWER_SUPPLY_PROP_CHARGE_TYPE,
396 POWER_SUPPLY_PROP_HEALTH,
397 POWER_SUPPLY_PROP_PRESENT,
398 POWER_SUPPLY_PROP_ONLINE,
399 POWER_SUPPLY_PROP_MODEL_NAME,
400 POWER_SUPPLY_PROP_MANUFACTURER,
401};
402
403static const char * const model_names[] = {
404 [MAXIM_DEVICE_TYPE_UNKNOWN] = "MAX14577-like",
405 [MAXIM_DEVICE_TYPE_MAX14577] = "MAX14577",
406 [MAXIM_DEVICE_TYPE_MAX77836] = "MAX77836",
407};
408static const char *manufacturer = "Maxim Integrated";
409
410static int max14577_charger_get_property(struct power_supply *psy,
411 enum power_supply_property psp,
412 union power_supply_propval *val)
413{
414 struct max14577_charger *chg = power_supply_get_drvdata(psy);
415 int ret = 0;
416
417 switch (psp) {
418 case POWER_SUPPLY_PROP_STATUS:
419 ret = max14577_get_charger_state(chg, val: &val->intval);
420 break;
421 case POWER_SUPPLY_PROP_CHARGE_TYPE:
422 ret = max14577_get_charge_type(chg, val: &val->intval);
423 break;
424 case POWER_SUPPLY_PROP_HEALTH:
425 ret = max14577_get_battery_health(chg, val: &val->intval);
426 break;
427 case POWER_SUPPLY_PROP_PRESENT:
428 ret = max14577_get_present(chg, val: &val->intval);
429 break;
430 case POWER_SUPPLY_PROP_ONLINE:
431 ret = max14577_get_online(chg, val: &val->intval);
432 break;
433 case POWER_SUPPLY_PROP_MODEL_NAME:
434 BUILD_BUG_ON(ARRAY_SIZE(model_names) != MAXIM_DEVICE_TYPE_NUM);
435 val->strval = model_names[chg->max14577->dev_type];
436 break;
437 case POWER_SUPPLY_PROP_MANUFACTURER:
438 val->strval = manufacturer;
439 break;
440 default:
441 return -EINVAL;
442 }
443
444 return ret;
445}
446
447static const struct power_supply_desc max14577_charger_desc = {
448 .name = "max14577-charger",
449 .type = POWER_SUPPLY_TYPE_BATTERY,
450 .properties = max14577_charger_props,
451 .num_properties = ARRAY_SIZE(max14577_charger_props),
452 .get_property = max14577_charger_get_property,
453};
454
455#ifdef CONFIG_OF
456static struct max14577_charger_platform_data *max14577_charger_dt_init(
457 struct platform_device *pdev)
458{
459 struct max14577_charger_platform_data *pdata;
460 struct device_node *np = pdev->dev.of_node;
461 int ret;
462
463 if (!np) {
464 dev_err(&pdev->dev, "No charger OF node\n");
465 return ERR_PTR(error: -EINVAL);
466 }
467
468 pdata = devm_kzalloc(dev: &pdev->dev, size: sizeof(*pdata), GFP_KERNEL);
469 if (!pdata)
470 return ERR_PTR(error: -ENOMEM);
471
472 ret = of_property_read_u32(np, propname: "maxim,constant-uvolt",
473 out_value: &pdata->constant_uvolt);
474 if (ret) {
475 dev_err(&pdev->dev, "Cannot parse maxim,constant-uvolt field from DT\n");
476 return ERR_PTR(error: ret);
477 }
478
479 ret = of_property_read_u32(np, propname: "maxim,fast-charge-uamp",
480 out_value: &pdata->fast_charge_uamp);
481 if (ret) {
482 dev_err(&pdev->dev, "Cannot parse maxim,fast-charge-uamp field from DT\n");
483 return ERR_PTR(error: ret);
484 }
485
486 ret = of_property_read_u32(np, propname: "maxim,eoc-uamp", out_value: &pdata->eoc_uamp);
487 if (ret) {
488 dev_err(&pdev->dev, "Cannot parse maxim,eoc-uamp field from DT\n");
489 return ERR_PTR(error: ret);
490 }
491
492 ret = of_property_read_u32(np, propname: "maxim,ovp-uvolt", out_value: &pdata->ovp_uvolt);
493 if (ret) {
494 dev_err(&pdev->dev, "Cannot parse maxim,ovp-uvolt field from DT\n");
495 return ERR_PTR(error: ret);
496 }
497
498 return pdata;
499}
500#else /* CONFIG_OF */
501static struct max14577_charger_platform_data *max14577_charger_dt_init(
502 struct platform_device *pdev)
503{
504 return NULL;
505}
506#endif /* CONFIG_OF */
507
508static ssize_t show_fast_charge_timer(struct device *dev,
509 struct device_attribute *attr, char *buf)
510{
511 struct max14577_charger *chg = dev_get_drvdata(dev);
512 u8 reg_data;
513 int ret;
514 unsigned int val;
515
516 ret = max14577_read_reg(map: chg->max14577->regmap, reg: MAX14577_REG_CHGCTRL1,
517 dest: &reg_data);
518 if (ret)
519 return ret;
520
521 reg_data &= CHGCTRL1_TCHW_MASK;
522 reg_data >>= CHGCTRL1_TCHW_SHIFT;
523 switch (reg_data) {
524 case 0x2 ... 0x4:
525 val = reg_data + 3;
526 break;
527 case 0x7:
528 val = 0;
529 break;
530 default:
531 val = 5;
532 break;
533 }
534
535 return sysfs_emit(buf, fmt: "%u\n", val);
536}
537
538static ssize_t store_fast_charge_timer(struct device *dev,
539 struct device_attribute *attr, const char *buf, size_t count)
540{
541 struct max14577_charger *chg = dev_get_drvdata(dev);
542 unsigned long val;
543 int ret;
544
545 ret = kstrtoul(s: buf, base: 10, res: &val);
546 if (ret)
547 return ret;
548
549 ret = max14577_set_fast_charge_timer(chg, hours: val);
550 if (ret)
551 return ret;
552
553 return count;
554}
555
556static DEVICE_ATTR(fast_charge_timer, S_IRUGO | S_IWUSR,
557 show_fast_charge_timer, store_fast_charge_timer);
558
559static int max14577_charger_probe(struct platform_device *pdev)
560{
561 struct max14577_charger *chg;
562 struct power_supply_config psy_cfg = {};
563 struct max14577 *max14577 = dev_get_drvdata(dev: pdev->dev.parent);
564 int ret;
565
566 chg = devm_kzalloc(dev: &pdev->dev, size: sizeof(*chg), GFP_KERNEL);
567 if (!chg)
568 return -ENOMEM;
569
570 platform_set_drvdata(pdev, data: chg);
571 chg->dev = &pdev->dev;
572 chg->max14577 = max14577;
573
574 chg->pdata = max14577_charger_dt_init(pdev);
575 if (IS_ERR_OR_NULL(ptr: chg->pdata))
576 return PTR_ERR(ptr: chg->pdata);
577
578 ret = max14577_charger_reg_init(chg);
579 if (ret)
580 return ret;
581
582 ret = device_create_file(device: &pdev->dev, entry: &dev_attr_fast_charge_timer);
583 if (ret) {
584 dev_err(&pdev->dev, "failed: create sysfs entry\n");
585 return ret;
586 }
587
588 psy_cfg.drv_data = chg;
589 chg->charger = power_supply_register(parent: &pdev->dev, desc: &max14577_charger_desc,
590 cfg: &psy_cfg);
591 if (IS_ERR(ptr: chg->charger)) {
592 dev_err(&pdev->dev, "failed: power supply register\n");
593 ret = PTR_ERR(ptr: chg->charger);
594 goto err;
595 }
596
597 /* Check for valid values for charger */
598 BUILD_BUG_ON(MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN +
599 MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP * 0xf !=
600 MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
601 return 0;
602
603err:
604 device_remove_file(dev: &pdev->dev, attr: &dev_attr_fast_charge_timer);
605
606 return ret;
607}
608
609static void max14577_charger_remove(struct platform_device *pdev)
610{
611 struct max14577_charger *chg = platform_get_drvdata(pdev);
612
613 device_remove_file(dev: &pdev->dev, attr: &dev_attr_fast_charge_timer);
614 power_supply_unregister(psy: chg->charger);
615}
616
617static const struct platform_device_id max14577_charger_id[] = {
618 { "max14577-charger", MAXIM_DEVICE_TYPE_MAX14577, },
619 { "max77836-charger", MAXIM_DEVICE_TYPE_MAX77836, },
620 { }
621};
622MODULE_DEVICE_TABLE(platform, max14577_charger_id);
623
624static const struct of_device_id of_max14577_charger_dt_match[] = {
625 { .compatible = "maxim,max14577-charger",
626 .data = (void *)MAXIM_DEVICE_TYPE_MAX14577, },
627 { .compatible = "maxim,max77836-charger",
628 .data = (void *)MAXIM_DEVICE_TYPE_MAX77836, },
629 { },
630};
631MODULE_DEVICE_TABLE(of, of_max14577_charger_dt_match);
632
633static struct platform_driver max14577_charger_driver = {
634 .driver = {
635 .name = "max14577-charger",
636 .of_match_table = of_max14577_charger_dt_match,
637 },
638 .probe = max14577_charger_probe,
639 .remove_new = max14577_charger_remove,
640 .id_table = max14577_charger_id,
641};
642module_platform_driver(max14577_charger_driver);
643
644MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
645MODULE_DESCRIPTION("Maxim 14577/77836 charger driver");
646MODULE_LICENSE("GPL");
647

source code of linux/drivers/power/supply/max14577_charger.c