Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/power/da9052-battery.c

  1 /*
  2  * Batttery Driver for Dialog DA9052 PMICs
  3  *
  4  * Copyright(c) 2011 Dialog Semiconductor Ltd.
  5  *
  6  * Author: David Dajun Chen <dchen@diasemi.com>
  7  *
  8  * This program is free software; you can redistribute  it and/or modify it
  9  * under  the terms of  the GNU General  Public License as published by the
 10  * Free Software Foundation;  either version 2 of the  License, or (at your
 11  * option) any later version.
 12  */
 13 
 14 #include <linux/delay.h>
 15 #include <linux/freezer.h>
 16 #include <linux/fs.h>
 17 #include <linux/jiffies.h>
 18 #include <linux/module.h>
 19 #include <linux/timer.h>
 20 #include <linux/uaccess.h>
 21 #include <linux/platform_device.h>
 22 #include <linux/power_supply.h>
 23 
 24 #include <linux/mfd/da9052/da9052.h>
 25 #include <linux/mfd/da9052/pdata.h>
 26 #include <linux/mfd/da9052/reg.h>
 27 
 28 /* STATIC CONFIGURATION */
 29 #define DA9052_BAT_CUTOFF_VOLT          2800
 30 #define DA9052_BAT_TSH                  62000
 31 #define DA9052_BAT_LOW_CAP              4
 32 #define DA9052_AVG_SZ                   4
 33 #define DA9052_VC_TBL_SZ                68
 34 #define DA9052_VC_TBL_REF_SZ            3
 35 
 36 #define DA9052_ISET_USB_MASK            0x0F
 37 #define DA9052_CHG_USB_ILIM_MASK        0x40
 38 #define DA9052_CHG_LIM_COLS             16
 39 
 40 #define DA9052_MEAN(x, y)               ((x + y) / 2)
 41 
 42 enum charger_type_enum {
 43         DA9052_NOCHARGER = 1,
 44         DA9052_CHARGER,
 45 };
 46 
 47 static const u16 da9052_chg_current_lim[2][DA9052_CHG_LIM_COLS] = {
 48         {70,  80,  90,  100, 110, 120, 400,  450,
 49          500, 550, 600, 650, 700, 900, 1100, 1300},
 50         {80,  90,  100, 110,  120,  400,  450,  500,
 51          550, 600, 800, 1000, 1200, 1400, 1600, 1800},
 52 };
 53 
 54 static const u16 vc_tbl_ref[3] = {10, 25, 40};
 55 /* Lookup table for voltage vs capacity */
 56 static u32 const vc_tbl[3][68][2] = {
 57         /* For temperature 10 degree Celsius */
 58         {
 59         {4082, 100}, {4036, 98},
 60         {4020, 96}, {4008, 95},
 61         {3997, 93}, {3983, 91},
 62         {3964, 90}, {3943, 88},
 63         {3926, 87}, {3912, 85},
 64         {3900, 84}, {3890, 82},
 65         {3881, 80}, {3873, 79},
 66         {3865, 77}, {3857, 76},
 67         {3848, 74}, {3839, 73},
 68         {3829, 71}, {3820, 70},
 69         {3811, 68}, {3802, 67},
 70         {3794, 65}, {3785, 64},
 71         {3778, 62}, {3770, 61},
 72         {3763, 59}, {3756, 58},
 73         {3750, 56}, {3744, 55},
 74         {3738, 53}, {3732, 52},
 75         {3727, 50}, {3722, 49},
 76         {3717, 47}, {3712, 46},
 77         {3708, 44}, {3703, 43},
 78         {3700, 41}, {3696, 40},
 79         {3693, 38}, {3691, 37},
 80         {3688, 35}, {3686, 34},
 81         {3683, 32}, {3681, 31},
 82         {3678, 29}, {3675, 28},
 83         {3672, 26}, {3669, 25},
 84         {3665, 23}, {3661, 22},
 85         {3656, 21}, {3651, 19},
 86         {3645, 18}, {3639, 16},
 87         {3631, 15}, {3622, 13},
 88         {3611, 12}, {3600, 10},
 89         {3587, 9}, {3572, 7},
 90         {3548, 6}, {3503, 5},
 91         {3420, 3}, {3268, 2},
 92         {2992, 1}, {2746, 0}
 93         },
 94         /* For temperature 25 degree Celsius */
 95         {
 96         {4102, 100}, {4065, 98},
 97         {4048, 96}, {4034, 95},
 98         {4021, 93}, {4011, 92},
 99         {4001, 90}, {3986, 88},
100         {3968, 87}, {3952, 85},
101         {3938, 84}, {3926, 82},
102         {3916, 81}, {3908, 79},
103         {3900, 77}, {3892, 76},
104         {3883, 74}, {3874, 73},
105         {3864, 71}, {3855, 70},
106         {3846, 68}, {3836, 67},
107         {3827, 65}, {3819, 64},
108         {3810, 62}, {3801, 61},
109         {3793, 59}, {3786, 58},
110         {3778, 56}, {3772, 55},
111         {3765, 53}, {3759, 52},
112         {3754, 50}, {3748, 49},
113         {3743, 47}, {3738, 46},
114         {3733, 44}, {3728, 43},
115         {3724, 41}, {3720, 40},
116         {3716, 38}, {3712, 37},
117         {3709, 35}, {3706, 34},
118         {3703, 33}, {3701, 31},
119         {3698, 30}, {3696, 28},
120         {3693, 27}, {3690, 25},
121         {3687, 24}, {3683, 22},
122         {3680, 21}, {3675, 19},
123         {3671, 18}, {3666, 17},
124         {3660, 15}, {3654, 14},
125         {3647, 12}, {3639, 11},
126         {3630, 9}, {3621, 8},
127         {3613, 6}, {3606, 5},
128         {3597, 4}, {3582, 2},
129         {3546, 1}, {2747, 0}
130         },
131         /* For temperature 40 degree Celsius */
132         {
133         {4114, 100}, {4081, 98},
134         {4065, 96}, {4050, 95},
135         {4036, 93}, {4024, 92},
136         {4013, 90}, {4002, 88},
137         {3990, 87}, {3976, 85},
138         {3962, 84}, {3950, 82},
139         {3939, 81}, {3930, 79},
140         {3921, 77}, {3912, 76},
141         {3902, 74}, {3893, 73},
142         {3883, 71}, {3874, 70},
143         {3865, 68}, {3856, 67},
144         {3847, 65}, {3838, 64},
145         {3829, 62}, {3820, 61},
146         {3812, 59}, {3803, 58},
147         {3795, 56}, {3787, 55},
148         {3780, 53}, {3773, 52},
149         {3767, 50}, {3761, 49},
150         {3756, 47}, {3751, 46},
151         {3746, 44}, {3741, 43},
152         {3736, 41}, {3732, 40},
153         {3728, 38}, {3724, 37},
154         {3720, 35}, {3716, 34},
155         {3713, 33}, {3710, 31},
156         {3707, 30}, {3704, 28},
157         {3701, 27}, {3698, 25},
158         {3695, 24}, {3691, 22},
159         {3686, 21}, {3681, 19},
160         {3676, 18}, {3671, 17},
161         {3666, 15}, {3661, 14},
162         {3655, 12}, {3648, 11},
163         {3640, 9}, {3632, 8},
164         {3622, 6}, {3616, 5},
165         {3611, 4}, {3604, 2},
166         {3594, 1}, {2747, 0}
167         }
168 };
169 
170 struct da9052_battery {
171         struct da9052 *da9052;
172         struct power_supply psy;
173         struct notifier_block nb;
174         int charger_type;
175         int status;
176         int health;
177 };
178 
179 static inline int volt_reg_to_mV(int value)
180 {
181         return ((value * 1000) / 512) + 2500;
182 }
183 
184 static inline int ichg_reg_to_mA(int value)
185 {
186         return (value * 3900) / 1000;
187 }
188 
189 static int da9052_read_chgend_current(struct da9052_battery *bat,
190                                        int *current_mA)
191 {
192         int ret;
193 
194         if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
195                 return -EINVAL;
196 
197         ret = da9052_reg_read(bat->da9052, DA9052_ICHG_END_REG);
198         if (ret < 0)
199                 return ret;
200 
201         *current_mA = ichg_reg_to_mA(ret & DA9052_ICHGEND_ICHGEND);
202 
203         return 0;
204 }
205 
206 static int da9052_read_chg_current(struct da9052_battery *bat, int *current_mA)
207 {
208         int ret;
209 
210         if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
211                 return -EINVAL;
212 
213         ret = da9052_reg_read(bat->da9052, DA9052_ICHG_AV_REG);
214         if (ret < 0)
215                 return ret;
216 
217         *current_mA = ichg_reg_to_mA(ret & DA9052_ICHGAV_ICHGAV);
218 
219         return 0;
220 }
221 
222 static int da9052_bat_check_status(struct da9052_battery *bat, int *status)
223 {
224         u8 v[2] = {0, 0};
225         u8 bat_status;
226         u8 chg_end;
227         int ret;
228         int chg_current;
229         int chg_end_current;
230         bool dcinsel;
231         bool dcindet;
232         bool vbussel;
233         bool vbusdet;
234         bool dc;
235         bool vbus;
236 
237         ret = da9052_group_read(bat->da9052, DA9052_STATUS_A_REG, 2, v);
238         if (ret < 0)
239                 return ret;
240 
241         bat_status = v[0];
242         chg_end = v[1];
243 
244         dcinsel = bat_status & DA9052_STATUSA_DCINSEL;
245         dcindet = bat_status & DA9052_STATUSA_DCINDET;
246         vbussel = bat_status & DA9052_STATUSA_VBUSSEL;
247         vbusdet = bat_status & DA9052_STATUSA_VBUSDET;
248         dc = dcinsel && dcindet;
249         vbus = vbussel && vbusdet;
250 
251         /* Preference to WALL(DCIN) charger unit */
252         if (dc || vbus) {
253                 bat->charger_type = DA9052_CHARGER;
254 
255                 /* If charging end flag is set and Charging current is greater
256                  * than charging end limit then battery is charging
257                 */
258                 if ((chg_end & DA9052_STATUSB_CHGEND) != 0) {
259                         ret = da9052_read_chg_current(bat, &chg_current);
260                         if (ret < 0)
261                                 return ret;
262                         ret = da9052_read_chgend_current(bat, &chg_end_current);
263                         if (ret < 0)
264                                 return ret;
265 
266                         if (chg_current >= chg_end_current)
267                                 bat->status = POWER_SUPPLY_STATUS_CHARGING;
268                         else
269                                 bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
270                 } else {
271                         /* If Charging end flag is cleared then battery is
272                          * charging
273                         */
274                         bat->status = POWER_SUPPLY_STATUS_CHARGING;
275                 }
276         } else if (dcindet || vbusdet) {
277                         bat->charger_type = DA9052_CHARGER;
278                         bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
279         } else {
280                 bat->charger_type = DA9052_NOCHARGER;
281                 bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
282         }
283 
284         if (status != NULL)
285                 *status = bat->status;
286         return 0;
287 }
288 
289 static int da9052_bat_read_volt(struct da9052_battery *bat, int *volt_mV)
290 {
291         int volt;
292 
293         volt = da9052_adc_manual_read(bat->da9052, DA9052_ADC_MAN_MUXSEL_VBAT);
294         if (volt < 0)
295                 return volt;
296 
297         *volt_mV = volt_reg_to_mV(volt);
298 
299         return 0;
300 }
301 
302 static int da9052_bat_check_presence(struct da9052_battery *bat, int *illegal)
303 {
304         int bat_temp;
305 
306         bat_temp = da9052_adc_read_temp(bat->da9052);
307         if (bat_temp < 0)
308                 return bat_temp;
309 
310         if (bat_temp > DA9052_BAT_TSH)
311                 *illegal = 1;
312         else
313                 *illegal = 0;
314 
315         return 0;
316 }
317 
318 static int da9052_bat_interpolate(int vbat_lower, int  vbat_upper,
319                                    int level_lower, int level_upper,
320                                    int bat_voltage)
321 {
322         int tmp;
323 
324         tmp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower);
325         tmp = level_lower + (((bat_voltage - vbat_lower) * tmp) / 1000);
326 
327         return tmp;
328 }
329 
330 static unsigned char da9052_determine_vc_tbl_index(unsigned char adc_temp)
331 {
332         int i;
333 
334         if (adc_temp <= vc_tbl_ref[0])
335                 return 0;
336 
337         if (adc_temp > vc_tbl_ref[DA9052_VC_TBL_REF_SZ - 1])
338                 return DA9052_VC_TBL_REF_SZ - 1;
339 
340         for (i = 0; i < DA9052_VC_TBL_REF_SZ - 1; i++) {
341                 if ((adc_temp > vc_tbl_ref[i]) &&
342                     (adc_temp <= DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1])))
343                                 return i;
344                 if ((adc_temp > DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1]))
345                      && (adc_temp <= vc_tbl_ref[i]))
346                                 return i + 1;
347         }
348         /*
349          * For some reason authors of the driver didn't presume that we can
350          * end up here. It might be OK, but might be not, no one knows for
351          * sure. Go check your battery, is it on fire?
352          */
353         WARN_ON(1);
354         return 0;
355 }
356 
357 static int da9052_bat_read_capacity(struct da9052_battery *bat, int *capacity)
358 {
359         int adc_temp;
360         int bat_voltage;
361         int vbat_lower;
362         int vbat_upper;
363         int level_upper;
364         int level_lower;
365         int ret;
366         int flag;
367         int i = 0;
368         int j;
369 
370         ret = da9052_bat_read_volt(bat, &bat_voltage);
371         if (ret < 0)
372                 return ret;
373 
374         adc_temp = da9052_adc_read_temp(bat->da9052);
375         if (adc_temp < 0)
376                 return adc_temp;
377 
378         i = da9052_determine_vc_tbl_index(adc_temp);
379 
380         if (bat_voltage >= vc_tbl[i][0][0]) {
381                 *capacity = 100;
382                 return 0;
383         }
384         if (bat_voltage <= vc_tbl[i][DA9052_VC_TBL_SZ - 1][0]) {
385                 *capacity = 0;
386                 return 0;
387         }
388         flag = 0;
389 
390         for (j = 0; j < (DA9052_VC_TBL_SZ-1); j++) {
391                 if ((bat_voltage <= vc_tbl[i][j][0]) &&
392                     (bat_voltage >= vc_tbl[i][j + 1][0])) {
393                         vbat_upper = vc_tbl[i][j][0];
394                         vbat_lower = vc_tbl[i][j + 1][0];
395                         level_upper = vc_tbl[i][j][1];
396                         level_lower = vc_tbl[i][j + 1][1];
397                         flag = 1;
398                         break;
399                 }
400         }
401         if (!flag)
402                 return -EIO;
403 
404         *capacity = da9052_bat_interpolate(vbat_lower, vbat_upper, level_lower,
405                                            level_upper, bat_voltage);
406 
407         return 0;
408 }
409 
410 static int da9052_bat_check_health(struct da9052_battery *bat, int *health)
411 {
412         int ret;
413         int bat_illegal;
414         int capacity;
415 
416         ret = da9052_bat_check_presence(bat, &bat_illegal);
417         if (ret < 0)
418                 return ret;
419 
420         if (bat_illegal) {
421                 bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;
422                 return 0;
423         }
424 
425         if (bat->health != POWER_SUPPLY_HEALTH_OVERHEAT) {
426                 ret = da9052_bat_read_capacity(bat, &capacity);
427                 if (ret < 0)
428                         return ret;
429                 if (capacity < DA9052_BAT_LOW_CAP)
430                         bat->health = POWER_SUPPLY_HEALTH_DEAD;
431                 else
432                         bat->health = POWER_SUPPLY_HEALTH_GOOD;
433         }
434 
435         *health = bat->health;
436 
437         return 0;
438 }
439 
440 static irqreturn_t da9052_bat_irq(int irq, void *data)
441 {
442         struct da9052_battery *bat = data;
443         int virq;
444 
445         virq = regmap_irq_get_virq(bat->da9052->irq_data, irq);
446         irq -= virq;
447 
448         if (irq == DA9052_IRQ_CHGEND)
449                 bat->status = POWER_SUPPLY_STATUS_FULL;
450         else
451                 da9052_bat_check_status(bat, NULL);
452 
453         if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN ||
454             irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) {
455                 power_supply_changed(&bat->psy);
456         }
457 
458         return IRQ_HANDLED;
459 }
460 
461 static int da9052_USB_current_notifier(struct notifier_block *nb,
462                                         unsigned long events, void *data)
463 {
464         u8 row;
465         u8 col;
466         int *current_mA = data;
467         int ret;
468         struct da9052_battery *bat = container_of(nb, struct da9052_battery,
469                                                   nb);
470 
471         if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
472                 return -EPERM;
473 
474         ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG);
475         if (ret & DA9052_CHG_USB_ILIM_MASK)
476                 return -EPERM;
477 
478         if (bat->da9052->chip_id == DA9052)
479                 row = 0;
480         else
481                 row = 1;
482 
483         if (*current_mA < da9052_chg_current_lim[row][0] ||
484             *current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1])
485                 return -EINVAL;
486 
487         for (col = 0; col <= DA9052_CHG_LIM_COLS - 1 ; col++) {
488                 if (*current_mA <= da9052_chg_current_lim[row][col])
489                         break;
490         }
491 
492         return da9052_reg_update(bat->da9052, DA9052_ISET_REG,
493                                  DA9052_ISET_USB_MASK, col);
494 }
495 
496 static int da9052_bat_get_property(struct power_supply *psy,
497                                     enum power_supply_property psp,
498                                     union power_supply_propval *val)
499 {
500         int ret;
501         int illegal;
502         struct da9052_battery *bat = container_of(psy, struct da9052_battery,
503                                                   psy);
504 
505         ret = da9052_bat_check_presence(bat, &illegal);
506         if (ret < 0)
507                 return ret;
508 
509         if (illegal && psp != POWER_SUPPLY_PROP_PRESENT)
510                 return -ENODEV;
511 
512         switch (psp) {
513         case POWER_SUPPLY_PROP_STATUS:
514                 ret = da9052_bat_check_status(bat, &val->intval);
515                 break;
516         case POWER_SUPPLY_PROP_ONLINE:
517                 val->intval =
518                         (bat->charger_type == DA9052_NOCHARGER) ? 0 : 1;
519                 break;
520         case POWER_SUPPLY_PROP_PRESENT:
521                 ret = da9052_bat_check_presence(bat, &val->intval);
522                 break;
523         case POWER_SUPPLY_PROP_HEALTH:
524                 ret = da9052_bat_check_health(bat, &val->intval);
525                 break;
526         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
527                 val->intval = DA9052_BAT_CUTOFF_VOLT * 1000;
528                 break;
529         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
530                 ret = da9052_bat_read_volt(bat, &val->intval);
531                 break;
532         case POWER_SUPPLY_PROP_CURRENT_AVG:
533                 ret = da9052_read_chg_current(bat, &val->intval);
534                 break;
535         case POWER_SUPPLY_PROP_CAPACITY:
536                 ret = da9052_bat_read_capacity(bat, &val->intval);
537                 break;
538         case POWER_SUPPLY_PROP_TEMP:
539                 val->intval = da9052_adc_read_temp(bat->da9052);
540                 ret = val->intval;
541                 break;
542         case POWER_SUPPLY_PROP_TECHNOLOGY:
543                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
544                 break;
545         default:
546                 return -EINVAL;
547         }
548         return ret;
549 }
550 
551 static enum power_supply_property da9052_bat_props[] = {
552         POWER_SUPPLY_PROP_STATUS,
553         POWER_SUPPLY_PROP_ONLINE,
554         POWER_SUPPLY_PROP_PRESENT,
555         POWER_SUPPLY_PROP_HEALTH,
556         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
557         POWER_SUPPLY_PROP_VOLTAGE_AVG,
558         POWER_SUPPLY_PROP_CURRENT_AVG,
559         POWER_SUPPLY_PROP_CAPACITY,
560         POWER_SUPPLY_PROP_TEMP,
561         POWER_SUPPLY_PROP_TECHNOLOGY,
562 };
563 
564 static struct power_supply template_battery = {
565         .name           = "da9052-bat",
566         .type           = POWER_SUPPLY_TYPE_BATTERY,
567         .properties     = da9052_bat_props,
568         .num_properties = ARRAY_SIZE(da9052_bat_props),
569         .get_property   = da9052_bat_get_property,
570 };
571 
572 static char *da9052_bat_irqs[] = {
573         "BATT TEMP",
574         "DCIN DET",
575         "DCIN REM",
576         "VBUS DET",
577         "VBUS REM",
578         "CHG END",
579 };
580 
581 static int da9052_bat_irq_bits[] = {
582         DA9052_IRQ_TBAT,
583         DA9052_IRQ_DCIN,
584         DA9052_IRQ_DCINREM,
585         DA9052_IRQ_VBUS,
586         DA9052_IRQ_VBUSREM,
587         DA9052_IRQ_CHGEND,
588 };
589 
590 static s32 da9052_bat_probe(struct platform_device *pdev)
591 {
592         struct da9052_pdata *pdata;
593         struct da9052_battery *bat;
594         int ret;
595         int i;
596 
597         bat = devm_kzalloc(&pdev->dev, sizeof(struct da9052_battery),
598                                 GFP_KERNEL);
599         if (!bat)
600                 return -ENOMEM;
601 
602         bat->da9052 = dev_get_drvdata(pdev->dev.parent);
603         bat->psy = template_battery;
604         bat->charger_type = DA9052_NOCHARGER;
605         bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
606         bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;
607         bat->nb.notifier_call = da9052_USB_current_notifier;
608 
609         pdata = bat->da9052->dev->platform_data;
610         if (pdata != NULL && pdata->use_for_apm)
611                 bat->psy.use_for_apm = pdata->use_for_apm;
612         else
613                 bat->psy.use_for_apm = 1;
614 
615         for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) {
616                 ret = da9052_request_irq(bat->da9052,
617                                 da9052_bat_irq_bits[i], da9052_bat_irqs[i],
618                                 da9052_bat_irq, bat);
619 
620                 if (ret != 0) {
621                         dev_err(bat->da9052->dev,
622                                 "DA9052 failed to request %s IRQ: %d\n",
623                                 da9052_bat_irqs[i], ret);
624                         goto err;
625                 }
626         }
627 
628         ret = power_supply_register(&pdev->dev, &bat->psy);
629          if (ret)
630                 goto err;
631 
632         platform_set_drvdata(pdev, bat);
633         return 0;
634 
635 err:
636         while (--i >= 0)
637                 da9052_free_irq(bat->da9052, da9052_bat_irq_bits[i], bat);
638 
639         return ret;
640 }
641 static int da9052_bat_remove(struct platform_device *pdev)
642 {
643         int i;
644         struct da9052_battery *bat = platform_get_drvdata(pdev);
645 
646         for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++)
647                 da9052_free_irq(bat->da9052, da9052_bat_irq_bits[i], bat);
648 
649         power_supply_unregister(&bat->psy);
650 
651         return 0;
652 }
653 
654 static struct platform_driver da9052_bat_driver = {
655         .probe = da9052_bat_probe,
656         .remove = da9052_bat_remove,
657         .driver = {
658                 .name = "da9052-bat",
659                 .owner = THIS_MODULE,
660         },
661 };
662 module_platform_driver(da9052_bat_driver);
663 
664 MODULE_DESCRIPTION("DA9052 BAT Device Driver");
665 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
666 MODULE_LICENSE("GPL");
667 MODULE_ALIAS("platform:da9052-bat");
668 

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