Merge branch 'for-3.11/drivers' of git://git.kernel.dk/linux-block
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / power / twl4030_charger.c
1 /*
2  * TWL4030/TPS65950 BCI (Battery Charger Interface) driver
3  *
4  * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com>
5  *
6  * based on twl4030_bci_battery.c by TI
7  * Copyright (C) 2008 Texas Instruments, Inc.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  */
14
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/err.h>
19 #include <linux/platform_device.h>
20 #include <linux/interrupt.h>
21 #include <linux/i2c/twl.h>
22 #include <linux/power_supply.h>
23 #include <linux/notifier.h>
24 #include <linux/usb/otg.h>
25 #include <linux/regulator/machine.h>
26
27 #define TWL4030_BCIMSTATEC      0x02
28 #define TWL4030_BCIICHG         0x08
29 #define TWL4030_BCIVAC          0x0a
30 #define TWL4030_BCIVBUS         0x0c
31 #define TWL4030_BCIMFSTS4       0x10
32 #define TWL4030_BCICTL1         0x23
33 #define TWL4030_BB_CFG          0x12
34
35 #define TWL4030_BCIAUTOWEN      BIT(5)
36 #define TWL4030_CONFIG_DONE     BIT(4)
37 #define TWL4030_BCIAUTOUSB      BIT(1)
38 #define TWL4030_BCIAUTOAC       BIT(0)
39 #define TWL4030_CGAIN           BIT(5)
40 #define TWL4030_USBFASTMCHG     BIT(2)
41 #define TWL4030_STS_VBUS        BIT(7)
42 #define TWL4030_STS_USB_ID      BIT(2)
43 #define TWL4030_BBCHEN          BIT(4)
44 #define TWL4030_BBSEL_MASK      0x0c
45 #define TWL4030_BBSEL_2V5       0x00
46 #define TWL4030_BBSEL_3V0       0x04
47 #define TWL4030_BBSEL_3V1       0x08
48 #define TWL4030_BBSEL_3V2       0x0c
49 #define TWL4030_BBISEL_MASK     0x03
50 #define TWL4030_BBISEL_25uA     0x00
51 #define TWL4030_BBISEL_150uA    0x01
52 #define TWL4030_BBISEL_500uA    0x02
53 #define TWL4030_BBISEL_1000uA   0x03
54
55 /* BCI interrupts */
56 #define TWL4030_WOVF            BIT(0) /* Watchdog overflow */
57 #define TWL4030_TMOVF           BIT(1) /* Timer overflow */
58 #define TWL4030_ICHGHIGH        BIT(2) /* Battery charge current high */
59 #define TWL4030_ICHGLOW         BIT(3) /* Battery cc. low / FSM state change */
60 #define TWL4030_ICHGEOC         BIT(4) /* Battery current end-of-charge */
61 #define TWL4030_TBATOR2         BIT(5) /* Battery temperature out of range 2 */
62 #define TWL4030_TBATOR1         BIT(6) /* Battery temperature out of range 1 */
63 #define TWL4030_BATSTS          BIT(7) /* Battery status */
64
65 #define TWL4030_VBATLVL         BIT(0) /* VBAT level */
66 #define TWL4030_VBATOV          BIT(1) /* VBAT overvoltage */
67 #define TWL4030_VBUSOV          BIT(2) /* VBUS overvoltage */
68 #define TWL4030_ACCHGOV         BIT(3) /* Ac charger overvoltage */
69
70 #define TWL4030_MSTATEC_USB             BIT(4)
71 #define TWL4030_MSTATEC_AC              BIT(5)
72 #define TWL4030_MSTATEC_MASK            0x0f
73 #define TWL4030_MSTATEC_QUICK1          0x02
74 #define TWL4030_MSTATEC_QUICK7          0x07
75 #define TWL4030_MSTATEC_COMPLETE1       0x0b
76 #define TWL4030_MSTATEC_COMPLETE4       0x0e
77
78 static bool allow_usb;
79 module_param(allow_usb, bool, 0644);
80 MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
81
82 struct twl4030_bci {
83         struct device           *dev;
84         struct power_supply     ac;
85         struct power_supply     usb;
86         struct usb_phy          *transceiver;
87         struct notifier_block   usb_nb;
88         struct work_struct      work;
89         int                     irq_chg;
90         int                     irq_bci;
91         struct regulator        *usb_reg;
92         int                     usb_enabled;
93
94         unsigned long           event;
95 };
96
97 /*
98  * clear and set bits on an given register on a given module
99  */
100 static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg)
101 {
102         u8 val = 0;
103         int ret;
104
105         ret = twl_i2c_read_u8(mod_no, &val, reg);
106         if (ret)
107                 return ret;
108
109         val &= ~clear;
110         val |= set;
111
112         return twl_i2c_write_u8(mod_no, val, reg);
113 }
114
115 static int twl4030_bci_read(u8 reg, u8 *val)
116 {
117         return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg);
118 }
119
120 static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
121 {
122         return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear,
123                         TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
124                         TWL4030_PM_MASTER_BOOT_BCI);
125 }
126
127 static int twl4030bci_read_adc_val(u8 reg)
128 {
129         int ret, temp;
130         u8 val;
131
132         /* read MSB */
133         ret = twl4030_bci_read(reg + 1, &val);
134         if (ret)
135                 return ret;
136
137         temp = (int)(val & 0x03) << 8;
138
139         /* read LSB */
140         ret = twl4030_bci_read(reg, &val);
141         if (ret)
142                 return ret;
143
144         return temp | val;
145 }
146
147 /*
148  * Check if VBUS power is present
149  */
150 static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
151 {
152         int ret;
153         u8 hwsts;
154
155         ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts,
156                               TWL4030_PM_MASTER_STS_HW_CONDITIONS);
157         if (ret < 0)
158                 return 0;
159
160         dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts);
161
162         /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */
163         if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID))
164                 return 1;
165
166         return 0;
167 }
168
169 /*
170  * Enable/Disable USB Charge functionality.
171  */
172 static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
173 {
174         int ret;
175
176         if (enable) {
177                 /* Check for USB charger connected */
178                 if (!twl4030_bci_have_vbus(bci))
179                         return -ENODEV;
180
181                 /*
182                  * Until we can find out what current the device can provide,
183                  * require a module param to enable USB charging.
184                  */
185                 if (!allow_usb) {
186                         dev_warn(bci->dev, "USB charging is disabled.\n");
187                         return -EACCES;
188                 }
189
190                 /* Need to keep regulator on */
191                 if (!bci->usb_enabled) {
192                         regulator_enable(bci->usb_reg);
193                         bci->usb_enabled = 1;
194                 }
195
196                 /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
197                 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
198                 if (ret < 0)
199                         return ret;
200
201                 /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
202                 ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0,
203                         TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
204         } else {
205                 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
206                 if (bci->usb_enabled) {
207                         regulator_disable(bci->usb_reg);
208                         bci->usb_enabled = 0;
209                 }
210         }
211
212         return ret;
213 }
214
215 /*
216  * Enable/Disable AC Charge funtionality.
217  */
218 static int twl4030_charger_enable_ac(bool enable)
219 {
220         int ret;
221
222         if (enable)
223                 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
224         else
225                 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
226
227         return ret;
228 }
229
230 /*
231  * Enable/Disable charging of Backup Battery.
232  */
233 static int twl4030_charger_enable_backup(int uvolt, int uamp)
234 {
235         int ret;
236         u8 flags;
237
238         if (uvolt < 2500000 ||
239             uamp < 25) {
240                 /* disable charging of backup battery */
241                 ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
242                                         TWL4030_BBCHEN, 0, TWL4030_BB_CFG);
243                 return ret;
244         }
245
246         flags = TWL4030_BBCHEN;
247         if (uvolt >= 3200000)
248                 flags |= TWL4030_BBSEL_3V2;
249         else if (uvolt >= 3100000)
250                 flags |= TWL4030_BBSEL_3V1;
251         else if (uvolt >= 3000000)
252                 flags |= TWL4030_BBSEL_3V0;
253         else
254                 flags |= TWL4030_BBSEL_2V5;
255
256         if (uamp >= 1000)
257                 flags |= TWL4030_BBISEL_1000uA;
258         else if (uamp >= 500)
259                 flags |= TWL4030_BBISEL_500uA;
260         else if (uamp >= 150)
261                 flags |= TWL4030_BBISEL_150uA;
262         else
263                 flags |= TWL4030_BBISEL_25uA;
264
265         ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
266                                 TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK,
267                                 flags,
268                                 TWL4030_BB_CFG);
269
270         return ret;
271 }
272
273 /*
274  * TWL4030 CHG_PRES (AC charger presence) events
275  */
276 static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
277 {
278         struct twl4030_bci *bci = arg;
279
280         dev_dbg(bci->dev, "CHG_PRES irq\n");
281         power_supply_changed(&bci->ac);
282         power_supply_changed(&bci->usb);
283
284         return IRQ_HANDLED;
285 }
286
287 /*
288  * TWL4030 BCI monitoring events
289  */
290 static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
291 {
292         struct twl4030_bci *bci = arg;
293         u8 irqs1, irqs2;
294         int ret;
295
296         ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
297                               TWL4030_INTERRUPTS_BCIISR1A);
298         if (ret < 0)
299                 return IRQ_HANDLED;
300
301         ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
302                               TWL4030_INTERRUPTS_BCIISR2A);
303         if (ret < 0)
304                 return IRQ_HANDLED;
305
306         dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
307
308         if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
309                 /* charger state change, inform the core */
310                 power_supply_changed(&bci->ac);
311                 power_supply_changed(&bci->usb);
312         }
313
314         /* various monitoring events, for now we just log them here */
315         if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1))
316                 dev_warn(bci->dev, "battery temperature out of range\n");
317
318         if (irqs1 & TWL4030_BATSTS)
319                 dev_crit(bci->dev, "battery disconnected\n");
320
321         if (irqs2 & TWL4030_VBATOV)
322                 dev_crit(bci->dev, "VBAT overvoltage\n");
323
324         if (irqs2 & TWL4030_VBUSOV)
325                 dev_crit(bci->dev, "VBUS overvoltage\n");
326
327         if (irqs2 & TWL4030_ACCHGOV)
328                 dev_crit(bci->dev, "Ac charger overvoltage\n");
329
330         return IRQ_HANDLED;
331 }
332
333 static void twl4030_bci_usb_work(struct work_struct *data)
334 {
335         struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
336
337         switch (bci->event) {
338         case USB_EVENT_VBUS:
339         case USB_EVENT_CHARGER:
340                 twl4030_charger_enable_usb(bci, true);
341                 break;
342         case USB_EVENT_NONE:
343                 twl4030_charger_enable_usb(bci, false);
344                 break;
345         }
346 }
347
348 static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
349                                void *priv)
350 {
351         struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb);
352
353         dev_dbg(bci->dev, "OTG notify %lu\n", val);
354
355         bci->event = val;
356         schedule_work(&bci->work);
357
358         return NOTIFY_OK;
359 }
360
361 /*
362  * TI provided formulas:
363  * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
364  * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
365  * Here we use integer approximation of:
366  * CGAIN == 0: val * 1.6618 - 0.85
367  * CGAIN == 1: (val * 1.6618 - 0.85) * 2
368  */
369 static int twl4030_charger_get_current(void)
370 {
371         int curr;
372         int ret;
373         u8 bcictl1;
374
375         curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
376         if (curr < 0)
377                 return curr;
378
379         ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
380         if (ret)
381                 return ret;
382
383         ret = (curr * 16618 - 850 * 10000) / 10;
384         if (bcictl1 & TWL4030_CGAIN)
385                 ret *= 2;
386
387         return ret;
388 }
389
390 /*
391  * Returns the main charge FSM state
392  * Or < 0 on failure.
393  */
394 static int twl4030bci_state(struct twl4030_bci *bci)
395 {
396         int ret;
397         u8 state;
398
399         ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
400         if (ret) {
401                 pr_err("twl4030_bci: error reading BCIMSTATEC\n");
402                 return ret;
403         }
404
405         dev_dbg(bci->dev, "state: %02x\n", state);
406
407         return state;
408 }
409
410 static int twl4030_bci_state_to_status(int state)
411 {
412         state &= TWL4030_MSTATEC_MASK;
413         if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
414                 return POWER_SUPPLY_STATUS_CHARGING;
415         else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
416                                         state <= TWL4030_MSTATEC_COMPLETE4)
417                 return POWER_SUPPLY_STATUS_FULL;
418         else
419                 return POWER_SUPPLY_STATUS_NOT_CHARGING;
420 }
421
422 static int twl4030_bci_get_property(struct power_supply *psy,
423                                     enum power_supply_property psp,
424                                     union power_supply_propval *val)
425 {
426         struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
427         int is_charging;
428         int state;
429         int ret;
430
431         state = twl4030bci_state(bci);
432         if (state < 0)
433                 return state;
434
435         if (psy->type == POWER_SUPPLY_TYPE_USB)
436                 is_charging = state & TWL4030_MSTATEC_USB;
437         else
438                 is_charging = state & TWL4030_MSTATEC_AC;
439
440         switch (psp) {
441         case POWER_SUPPLY_PROP_STATUS:
442                 if (is_charging)
443                         val->intval = twl4030_bci_state_to_status(state);
444                 else
445                         val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
446                 break;
447         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
448                 /* charging must be active for meaningful result */
449                 if (!is_charging)
450                         return -ENODATA;
451                 if (psy->type == POWER_SUPPLY_TYPE_USB) {
452                         ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
453                         if (ret < 0)
454                                 return ret;
455                         /* BCIVBUS uses ADCIN8, 7/1023 V/step */
456                         val->intval = ret * 6843;
457                 } else {
458                         ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
459                         if (ret < 0)
460                                 return ret;
461                         /* BCIVAC uses ADCIN11, 10/1023 V/step */
462                         val->intval = ret * 9775;
463                 }
464                 break;
465         case POWER_SUPPLY_PROP_CURRENT_NOW:
466                 if (!is_charging)
467                         return -ENODATA;
468                 /* current measurement is shared between AC and USB */
469                 ret = twl4030_charger_get_current();
470                 if (ret < 0)
471                         return ret;
472                 val->intval = ret;
473                 break;
474         case POWER_SUPPLY_PROP_ONLINE:
475                 val->intval = is_charging &&
476                         twl4030_bci_state_to_status(state) !=
477                                 POWER_SUPPLY_STATUS_NOT_CHARGING;
478                 break;
479         default:
480                 return -EINVAL;
481         }
482
483         return 0;
484 }
485
486 static enum power_supply_property twl4030_charger_props[] = {
487         POWER_SUPPLY_PROP_STATUS,
488         POWER_SUPPLY_PROP_ONLINE,
489         POWER_SUPPLY_PROP_VOLTAGE_NOW,
490         POWER_SUPPLY_PROP_CURRENT_NOW,
491 };
492
493 static int __init twl4030_bci_probe(struct platform_device *pdev)
494 {
495         struct twl4030_bci *bci;
496         struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
497         int ret;
498         u32 reg;
499
500         bci = kzalloc(sizeof(*bci), GFP_KERNEL);
501         if (bci == NULL)
502                 return -ENOMEM;
503
504         bci->dev = &pdev->dev;
505         bci->irq_chg = platform_get_irq(pdev, 0);
506         bci->irq_bci = platform_get_irq(pdev, 1);
507
508         platform_set_drvdata(pdev, bci);
509
510         bci->ac.name = "twl4030_ac";
511         bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
512         bci->ac.properties = twl4030_charger_props;
513         bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
514         bci->ac.get_property = twl4030_bci_get_property;
515
516         ret = power_supply_register(&pdev->dev, &bci->ac);
517         if (ret) {
518                 dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
519                 goto fail_register_ac;
520         }
521
522         bci->usb.name = "twl4030_usb";
523         bci->usb.type = POWER_SUPPLY_TYPE_USB;
524         bci->usb.properties = twl4030_charger_props;
525         bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
526         bci->usb.get_property = twl4030_bci_get_property;
527
528         bci->usb_reg = regulator_get(bci->dev, "bci3v1");
529
530         ret = power_supply_register(&pdev->dev, &bci->usb);
531         if (ret) {
532                 dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
533                 goto fail_register_usb;
534         }
535
536         ret = request_threaded_irq(bci->irq_chg, NULL,
537                         twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name,
538                         bci);
539         if (ret < 0) {
540                 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
541                         bci->irq_chg, ret);
542                 goto fail_chg_irq;
543         }
544
545         ret = request_threaded_irq(bci->irq_bci, NULL,
546                         twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci);
547         if (ret < 0) {
548                 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
549                         bci->irq_bci, ret);
550                 goto fail_bci_irq;
551         }
552
553         INIT_WORK(&bci->work, twl4030_bci_usb_work);
554
555         bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
556         if (!IS_ERR_OR_NULL(bci->transceiver)) {
557                 bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
558                 usb_register_notifier(bci->transceiver, &bci->usb_nb);
559         }
560
561         /* Enable interrupts now. */
562         reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
563                 TWL4030_TBATOR1 | TWL4030_BATSTS);
564         ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
565                                TWL4030_INTERRUPTS_BCIIMR1A);
566         if (ret < 0) {
567                 dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
568                 goto fail_unmask_interrupts;
569         }
570
571         reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
572         ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
573                                TWL4030_INTERRUPTS_BCIIMR2A);
574         if (ret < 0)
575                 dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
576
577         twl4030_charger_enable_ac(true);
578         twl4030_charger_enable_usb(bci, true);
579         twl4030_charger_enable_backup(pdata->bb_uvolt,
580                                       pdata->bb_uamp);
581
582         return 0;
583
584 fail_unmask_interrupts:
585         if (!IS_ERR_OR_NULL(bci->transceiver)) {
586                 usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
587                 usb_put_phy(bci->transceiver);
588         }
589         free_irq(bci->irq_bci, bci);
590 fail_bci_irq:
591         free_irq(bci->irq_chg, bci);
592 fail_chg_irq:
593         power_supply_unregister(&bci->usb);
594 fail_register_usb:
595         power_supply_unregister(&bci->ac);
596 fail_register_ac:
597         kfree(bci);
598
599         return ret;
600 }
601
602 static int __exit twl4030_bci_remove(struct platform_device *pdev)
603 {
604         struct twl4030_bci *bci = platform_get_drvdata(pdev);
605
606         twl4030_charger_enable_ac(false);
607         twl4030_charger_enable_usb(bci, false);
608         twl4030_charger_enable_backup(0, 0);
609
610         /* mask interrupts */
611         twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
612                          TWL4030_INTERRUPTS_BCIIMR1A);
613         twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
614                          TWL4030_INTERRUPTS_BCIIMR2A);
615
616         if (!IS_ERR_OR_NULL(bci->transceiver)) {
617                 usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
618                 usb_put_phy(bci->transceiver);
619         }
620         free_irq(bci->irq_bci, bci);
621         free_irq(bci->irq_chg, bci);
622         power_supply_unregister(&bci->usb);
623         power_supply_unregister(&bci->ac);
624         kfree(bci);
625
626         return 0;
627 }
628
629 static struct platform_driver twl4030_bci_driver = {
630         .driver = {
631                 .name   = "twl4030_bci",
632                 .owner  = THIS_MODULE,
633         },
634         .remove = __exit_p(twl4030_bci_remove),
635 };
636
637 module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe);
638
639 MODULE_AUTHOR("Gražvydas Ignotas");
640 MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
641 MODULE_LICENSE("GPL");
642 MODULE_ALIAS("platform:twl4030_bci");