Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 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

Linux/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                         ret = regulator_enable(bci->usb_reg);
193                         if (ret) {
194                                 dev_err(bci->dev,
195                                         "Failed to enable regulator\n");
196                                 return ret;
197                         }
198                         bci->usb_enabled = 1;
199                 }
200 
201                 /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
202                 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
203                 if (ret < 0)
204                         return ret;
205 
206                 /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
207                 ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0,
208                         TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
209         } else {
210                 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
211                 if (bci->usb_enabled) {
212                         regulator_disable(bci->usb_reg);
213                         bci->usb_enabled = 0;
214                 }
215         }
216 
217         return ret;
218 }
219 
220 /*
221  * Enable/Disable AC Charge funtionality.
222  */
223 static int twl4030_charger_enable_ac(bool enable)
224 {
225         int ret;
226 
227         if (enable)
228                 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
229         else
230                 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
231 
232         return ret;
233 }
234 
235 /*
236  * Enable/Disable charging of Backup Battery.
237  */
238 static int twl4030_charger_enable_backup(int uvolt, int uamp)
239 {
240         int ret;
241         u8 flags;
242 
243         if (uvolt < 2500000 ||
244             uamp < 25) {
245                 /* disable charging of backup battery */
246                 ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
247                                         TWL4030_BBCHEN, 0, TWL4030_BB_CFG);
248                 return ret;
249         }
250 
251         flags = TWL4030_BBCHEN;
252         if (uvolt >= 3200000)
253                 flags |= TWL4030_BBSEL_3V2;
254         else if (uvolt >= 3100000)
255                 flags |= TWL4030_BBSEL_3V1;
256         else if (uvolt >= 3000000)
257                 flags |= TWL4030_BBSEL_3V0;
258         else
259                 flags |= TWL4030_BBSEL_2V5;
260 
261         if (uamp >= 1000)
262                 flags |= TWL4030_BBISEL_1000uA;
263         else if (uamp >= 500)
264                 flags |= TWL4030_BBISEL_500uA;
265         else if (uamp >= 150)
266                 flags |= TWL4030_BBISEL_150uA;
267         else
268                 flags |= TWL4030_BBISEL_25uA;
269 
270         ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
271                                 TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK,
272                                 flags,
273                                 TWL4030_BB_CFG);
274 
275         return ret;
276 }
277 
278 /*
279  * TWL4030 CHG_PRES (AC charger presence) events
280  */
281 static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
282 {
283         struct twl4030_bci *bci = arg;
284 
285         dev_dbg(bci->dev, "CHG_PRES irq\n");
286         power_supply_changed(&bci->ac);
287         power_supply_changed(&bci->usb);
288 
289         return IRQ_HANDLED;
290 }
291 
292 /*
293  * TWL4030 BCI monitoring events
294  */
295 static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
296 {
297         struct twl4030_bci *bci = arg;
298         u8 irqs1, irqs2;
299         int ret;
300 
301         ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
302                               TWL4030_INTERRUPTS_BCIISR1A);
303         if (ret < 0)
304                 return IRQ_HANDLED;
305 
306         ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
307                               TWL4030_INTERRUPTS_BCIISR2A);
308         if (ret < 0)
309                 return IRQ_HANDLED;
310 
311         dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
312 
313         if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
314                 /* charger state change, inform the core */
315                 power_supply_changed(&bci->ac);
316                 power_supply_changed(&bci->usb);
317         }
318 
319         /* various monitoring events, for now we just log them here */
320         if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1))
321                 dev_warn(bci->dev, "battery temperature out of range\n");
322 
323         if (irqs1 & TWL4030_BATSTS)
324                 dev_crit(bci->dev, "battery disconnected\n");
325 
326         if (irqs2 & TWL4030_VBATOV)
327                 dev_crit(bci->dev, "VBAT overvoltage\n");
328 
329         if (irqs2 & TWL4030_VBUSOV)
330                 dev_crit(bci->dev, "VBUS overvoltage\n");
331 
332         if (irqs2 & TWL4030_ACCHGOV)
333                 dev_crit(bci->dev, "Ac charger overvoltage\n");
334 
335         return IRQ_HANDLED;
336 }
337 
338 static void twl4030_bci_usb_work(struct work_struct *data)
339 {
340         struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
341 
342         switch (bci->event) {
343         case USB_EVENT_VBUS:
344         case USB_EVENT_CHARGER:
345                 twl4030_charger_enable_usb(bci, true);
346                 break;
347         case USB_EVENT_NONE:
348                 twl4030_charger_enable_usb(bci, false);
349                 break;
350         }
351 }
352 
353 static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
354                                void *priv)
355 {
356         struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb);
357 
358         dev_dbg(bci->dev, "OTG notify %lu\n", val);
359 
360         bci->event = val;
361         schedule_work(&bci->work);
362 
363         return NOTIFY_OK;
364 }
365 
366 /*
367  * TI provided formulas:
368  * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
369  * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
370  * Here we use integer approximation of:
371  * CGAIN == 0: val * 1.6618 - 0.85
372  * CGAIN == 1: (val * 1.6618 - 0.85) * 2
373  */
374 static int twl4030_charger_get_current(void)
375 {
376         int curr;
377         int ret;
378         u8 bcictl1;
379 
380         curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
381         if (curr < 0)
382                 return curr;
383 
384         ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
385         if (ret)
386                 return ret;
387 
388         ret = (curr * 16618 - 850 * 10000) / 10;
389         if (bcictl1 & TWL4030_CGAIN)
390                 ret *= 2;
391 
392         return ret;
393 }
394 
395 /*
396  * Returns the main charge FSM state
397  * Or < 0 on failure.
398  */
399 static int twl4030bci_state(struct twl4030_bci *bci)
400 {
401         int ret;
402         u8 state;
403 
404         ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
405         if (ret) {
406                 pr_err("twl4030_bci: error reading BCIMSTATEC\n");
407                 return ret;
408         }
409 
410         dev_dbg(bci->dev, "state: %02x\n", state);
411 
412         return state;
413 }
414 
415 static int twl4030_bci_state_to_status(int state)
416 {
417         state &= TWL4030_MSTATEC_MASK;
418         if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
419                 return POWER_SUPPLY_STATUS_CHARGING;
420         else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
421                                         state <= TWL4030_MSTATEC_COMPLETE4)
422                 return POWER_SUPPLY_STATUS_FULL;
423         else
424                 return POWER_SUPPLY_STATUS_NOT_CHARGING;
425 }
426 
427 static int twl4030_bci_get_property(struct power_supply *psy,
428                                     enum power_supply_property psp,
429                                     union power_supply_propval *val)
430 {
431         struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
432         int is_charging;
433         int state;
434         int ret;
435 
436         state = twl4030bci_state(bci);
437         if (state < 0)
438                 return state;
439 
440         if (psy->type == POWER_SUPPLY_TYPE_USB)
441                 is_charging = state & TWL4030_MSTATEC_USB;
442         else
443                 is_charging = state & TWL4030_MSTATEC_AC;
444 
445         switch (psp) {
446         case POWER_SUPPLY_PROP_STATUS:
447                 if (is_charging)
448                         val->intval = twl4030_bci_state_to_status(state);
449                 else
450                         val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
451                 break;
452         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
453                 /* charging must be active for meaningful result */
454                 if (!is_charging)
455                         return -ENODATA;
456                 if (psy->type == POWER_SUPPLY_TYPE_USB) {
457                         ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
458                         if (ret < 0)
459                                 return ret;
460                         /* BCIVBUS uses ADCIN8, 7/1023 V/step */
461                         val->intval = ret * 6843;
462                 } else {
463                         ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
464                         if (ret < 0)
465                                 return ret;
466                         /* BCIVAC uses ADCIN11, 10/1023 V/step */
467                         val->intval = ret * 9775;
468                 }
469                 break;
470         case POWER_SUPPLY_PROP_CURRENT_NOW:
471                 if (!is_charging)
472                         return -ENODATA;
473                 /* current measurement is shared between AC and USB */
474                 ret = twl4030_charger_get_current();
475                 if (ret < 0)
476                         return ret;
477                 val->intval = ret;
478                 break;
479         case POWER_SUPPLY_PROP_ONLINE:
480                 val->intval = is_charging &&
481                         twl4030_bci_state_to_status(state) !=
482                                 POWER_SUPPLY_STATUS_NOT_CHARGING;
483                 break;
484         default:
485                 return -EINVAL;
486         }
487 
488         return 0;
489 }
490 
491 static enum power_supply_property twl4030_charger_props[] = {
492         POWER_SUPPLY_PROP_STATUS,
493         POWER_SUPPLY_PROP_ONLINE,
494         POWER_SUPPLY_PROP_VOLTAGE_NOW,
495         POWER_SUPPLY_PROP_CURRENT_NOW,
496 };
497 
498 #ifdef CONFIG_OF
499 static const struct twl4030_bci_platform_data *
500 twl4030_bci_parse_dt(struct device *dev)
501 {
502         struct device_node *np = dev->of_node;
503         struct twl4030_bci_platform_data *pdata;
504         u32 num;
505 
506         if (!np)
507                 return NULL;
508         pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
509         if (!pdata)
510                 return pdata;
511 
512         if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0)
513                 pdata->bb_uvolt = num;
514         if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0)
515                 pdata->bb_uamp = num;
516         return pdata;
517 }
518 #else
519 static inline const struct twl4030_bci_platform_data *
520 twl4030_bci_parse_dt(struct device *dev)
521 {
522         return NULL;
523 }
524 #endif
525 
526 static int __init twl4030_bci_probe(struct platform_device *pdev)
527 {
528         struct twl4030_bci *bci;
529         const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
530         int ret;
531         u32 reg;
532 
533         bci = kzalloc(sizeof(*bci), GFP_KERNEL);
534         if (bci == NULL)
535                 return -ENOMEM;
536 
537         if (!pdata)
538                 pdata = twl4030_bci_parse_dt(&pdev->dev);
539 
540         bci->dev = &pdev->dev;
541         bci->irq_chg = platform_get_irq(pdev, 0);
542         bci->irq_bci = platform_get_irq(pdev, 1);
543 
544         platform_set_drvdata(pdev, bci);
545 
546         bci->ac.name = "twl4030_ac";
547         bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
548         bci->ac.properties = twl4030_charger_props;
549         bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
550         bci->ac.get_property = twl4030_bci_get_property;
551 
552         ret = power_supply_register(&pdev->dev, &bci->ac);
553         if (ret) {
554                 dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
555                 goto fail_register_ac;
556         }
557 
558         bci->usb.name = "twl4030_usb";
559         bci->usb.type = POWER_SUPPLY_TYPE_USB;
560         bci->usb.properties = twl4030_charger_props;
561         bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
562         bci->usb.get_property = twl4030_bci_get_property;
563 
564         bci->usb_reg = regulator_get(bci->dev, "bci3v1");
565 
566         ret = power_supply_register(&pdev->dev, &bci->usb);
567         if (ret) {
568                 dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
569                 goto fail_register_usb;
570         }
571 
572         ret = request_threaded_irq(bci->irq_chg, NULL,
573                         twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name,
574                         bci);
575         if (ret < 0) {
576                 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
577                         bci->irq_chg, ret);
578                 goto fail_chg_irq;
579         }
580 
581         ret = request_threaded_irq(bci->irq_bci, NULL,
582                         twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci);
583         if (ret < 0) {
584                 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
585                         bci->irq_bci, ret);
586                 goto fail_bci_irq;
587         }
588 
589         INIT_WORK(&bci->work, twl4030_bci_usb_work);
590 
591         bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
592         if (!IS_ERR_OR_NULL(bci->transceiver)) {
593                 bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
594                 usb_register_notifier(bci->transceiver, &bci->usb_nb);
595         }
596 
597         /* Enable interrupts now. */
598         reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
599                 TWL4030_TBATOR1 | TWL4030_BATSTS);
600         ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
601                                TWL4030_INTERRUPTS_BCIIMR1A);
602         if (ret < 0) {
603                 dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
604                 goto fail_unmask_interrupts;
605         }
606 
607         reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
608         ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
609                                TWL4030_INTERRUPTS_BCIIMR2A);
610         if (ret < 0)
611                 dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
612 
613         twl4030_charger_enable_ac(true);
614         twl4030_charger_enable_usb(bci, true);
615         if (pdata)
616                 twl4030_charger_enable_backup(pdata->bb_uvolt,
617                                               pdata->bb_uamp);
618         else
619                 twl4030_charger_enable_backup(0, 0);
620 
621         return 0;
622 
623 fail_unmask_interrupts:
624         if (!IS_ERR_OR_NULL(bci->transceiver)) {
625                 usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
626                 usb_put_phy(bci->transceiver);
627         }
628         free_irq(bci->irq_bci, bci);
629 fail_bci_irq:
630         free_irq(bci->irq_chg, bci);
631 fail_chg_irq:
632         power_supply_unregister(&bci->usb);
633 fail_register_usb:
634         power_supply_unregister(&bci->ac);
635 fail_register_ac:
636         kfree(bci);
637 
638         return ret;
639 }
640 
641 static int __exit twl4030_bci_remove(struct platform_device *pdev)
642 {
643         struct twl4030_bci *bci = platform_get_drvdata(pdev);
644 
645         twl4030_charger_enable_ac(false);
646         twl4030_charger_enable_usb(bci, false);
647         twl4030_charger_enable_backup(0, 0);
648 
649         /* mask interrupts */
650         twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
651                          TWL4030_INTERRUPTS_BCIIMR1A);
652         twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
653                          TWL4030_INTERRUPTS_BCIIMR2A);
654 
655         if (!IS_ERR_OR_NULL(bci->transceiver)) {
656                 usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
657                 usb_put_phy(bci->transceiver);
658         }
659         free_irq(bci->irq_bci, bci);
660         free_irq(bci->irq_chg, bci);
661         power_supply_unregister(&bci->usb);
662         power_supply_unregister(&bci->ac);
663         kfree(bci);
664 
665         return 0;
666 }
667 
668 static const struct of_device_id twl_bci_of_match[] = {
669         {.compatible = "ti,twl4030-bci", },
670         { }
671 };
672 MODULE_DEVICE_TABLE(of, twl_bci_of_match);
673 
674 static struct platform_driver twl4030_bci_driver = {
675         .driver = {
676                 .name   = "twl4030_bci",
677                 .owner  = THIS_MODULE,
678                 .of_match_table = of_match_ptr(twl_bci_of_match),
679         },
680         .remove = __exit_p(twl4030_bci_remove),
681 };
682 
683 module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe);
684 
685 MODULE_AUTHOR("Gražvydas Ignotas");
686 MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
687 MODULE_LICENSE("GPL");
688 MODULE_ALIAS("platform:twl4030_bci");
689 

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