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