2 * TWL4030/TPS65950 BCI (Battery Charger Interface) driver
4 * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com>
6 * based on twl4030_bci_battery.c by TI
7 * Copyright (C) 2008 Texas Instruments, Inc.
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.
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/platform_device.h>
19 #include <linux/interrupt.h>
20 #include <linux/i2c/twl.h>
21 #include <linux/power_supply.h>
22 #include <linux/notifier.h>
23 #include <linux/usb/otg.h>
24 #include <linux/ratelimit.h>
26 #define TWL4030_BCIMSTATEC 0x02
27 #define TWL4030_BCIICHG 0x08
28 #define TWL4030_BCIVAC 0x0a
29 #define TWL4030_BCIVBUS 0x0c
30 #define TWL4030_BCIMFSTS4 0x10
31 #define TWL4030_BCIMFKEY 0x11
32 #define TWL4030_BCICTL1 0x23
33 #define TWL4030_BCIIREF1 0x27
34 #define TWL4030_BCIIREF2 0x28
36 #define TWL4030_BCIAUTOWEN BIT(5)
37 #define TWL4030_CONFIG_DONE BIT(4)
38 #define TWL4030_BCIAUTOUSB BIT(1)
39 #define TWL4030_BCIAUTOAC BIT(0)
40 #define TWL4030_CGAIN BIT(5)
41 #define TWL4030_USBFASTMCHG BIT(2)
42 #define TWL4030_STS_VBUS BIT(7)
43 #define TWL4030_STS_USB_ID BIT(2)
46 #define TWL4030_WOVF BIT(0) /* Watchdog overflow */
47 #define TWL4030_TMOVF BIT(1) /* Timer overflow */
48 #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */
49 #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */
50 #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */
51 #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */
52 #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */
53 #define TWL4030_BATSTS BIT(7) /* Battery status */
55 #define TWL4030_VBATLVL BIT(0) /* VBAT level */
56 #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */
57 #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */
58 #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */
60 #define TWL4030_MSTATEC_USB BIT(4)
61 #define TWL4030_MSTATEC_AC BIT(5)
62 #define TWL4030_MSTATEC_MASK 0x0f
63 #define TWL4030_MSTATEC_QUICK1 0x02
64 #define TWL4030_MSTATEC_QUICK7 0x07
65 #define TWL4030_MSTATEC_COMPLETE1 0x0b
66 #define TWL4030_MSTATEC_COMPLETE4 0x0e
68 #define TWL4030_KEY_IIREF 0xe7
70 static bool allow_usb = 1;
71 module_param(allow_usb, bool, 0644);
72 MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
76 struct power_supply ac;
77 struct power_supply usb;
78 struct otg_transceiver *transceiver;
79 struct notifier_block otg_nb;
80 struct work_struct work;
83 bool ac_charge_enable;
84 bool usb_charge_enable;
87 enum power_supply_type current_supply;
90 struct ratelimit_state ratelimit;
94 * clear and set bits on an given register on a given module
96 static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg)
101 ret = twl_i2c_read_u8(mod_no, &val, reg);
108 return twl_i2c_write_u8(mod_no, val, reg);
111 static int twl4030_bci_read(u8 reg, u8 *val)
113 return twl_i2c_read_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
116 static int twl4030_bci_write(u8 reg, u8 val)
118 return twl_i2c_write_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
121 static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
123 return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, clear,
124 TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
125 TWL4030_PM_MASTER_BOOT_BCI);
128 static int twl4030bci_read_adc_val(u8 reg)
134 ret = twl4030_bci_read(reg + 1, &val);
138 temp = (int)(val & 0x03) << 8;
141 ret = twl4030_bci_read(reg, &val);
149 * Check if VBUS power is present
151 static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
156 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hwsts,
157 TWL4030_PM_MASTER_STS_HW_CONDITIONS);
161 dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts);
163 /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */
164 if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID))
171 * Enable/Disable USB Charge functionality.
173 static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
178 if (!bci->usb_charge_enable)
181 /* Check for USB charger conneted */
182 if (!twl4030_bci_have_vbus(bci))
186 * Until we can find out what current the device can provide,
187 * require a module param to enable USB charging.
190 dev_warn(bci->dev, "USB charging is disabled.\n");
194 /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
195 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
199 /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
200 ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE, 0,
201 TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
203 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
210 * Enable/Disable AC Charge funtionality.
212 static int twl4030_charger_enable_ac(bool enable)
217 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
219 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
224 static int set_charge_current(struct twl4030_bci *bci, int new_current)
226 u8 tmp, boot_bci_prev, cgain_set, cgain_clear;
229 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci_prev,
230 TWL4030_PM_MASTER_BOOT_BCI);
235 * Stop automatic charging here, because charge current change
236 * requires multiple register writes and CGAIN change requires
237 * automatic charge to be stopped.
239 ret = twl4030_clear_set_boot_bci(
240 TWL4030_BCIAUTOAC | TWL4030_BCIAUTOUSB | 4, 0);
244 ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
248 ret = twl4030_bci_write(TWL4030_BCIIREF1, new_current & 0xff);
252 ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
256 ret = twl4030_bci_write(TWL4030_BCIIREF2, (new_current >> 8) & 0x1);
260 /* Set CGAIN = 0 or 1 */
261 if (new_current > 511) {
262 cgain_set = TWL4030_CGAIN;
266 cgain_clear = TWL4030_CGAIN;
269 ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE,
270 cgain_clear, cgain_set, TWL4030_BCICTL1);
274 ret = twl4030_bci_read(TWL4030_BCICTL1, &tmp);
275 if (ret != 0 || (tmp & TWL4030_CGAIN) != cgain_set) {
276 dev_err(bci->dev, "CGAIN change failed\n");
280 ret = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, boot_bci_prev,
281 TWL4030_PM_MASTER_BOOT_BCI);
284 dev_err(bci->dev, "charge current change failed\n");
290 * TWL4030 CHG_PRES (AC charger presence) events
292 static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
294 struct twl4030_bci *bci = arg;
296 dev_dbg(bci->dev, "CHG_PRES irq\n");
297 power_supply_changed(&bci->ac);
298 power_supply_changed(&bci->usb);
304 * TWL4030 BCI monitoring events
306 static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
308 struct twl4030_bci *bci = arg;
312 ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
313 TWL4030_INTERRUPTS_BCIISR1A);
317 ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
318 TWL4030_INTERRUPTS_BCIISR2A);
322 dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
324 if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
325 /* charger state change, inform the core */
326 power_supply_changed(&bci->ac);
327 power_supply_changed(&bci->usb);
330 /* various monitoring events, for now we just log them here */
331 if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1) &&
332 __ratelimit(&bci->ratelimit))
333 dev_warn(bci->dev, "battery temperature out of range\n");
335 if (irqs1 & TWL4030_BATSTS && __ratelimit(&bci->ratelimit))
336 dev_crit(bci->dev, "battery disconnected\n");
338 if (irqs2 & TWL4030_VBATOV && __ratelimit(&bci->ratelimit))
339 dev_crit(bci->dev, "VBAT overvoltage\n");
341 if (irqs2 & TWL4030_VBUSOV && __ratelimit(&bci->ratelimit))
342 dev_crit(bci->dev, "VBUS overvoltage\n");
344 if (irqs2 & TWL4030_ACCHGOV && __ratelimit(&bci->ratelimit))
345 dev_crit(bci->dev, "Ac charger overvoltage\n");
347 /* ack the interrupts */
348 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs1,
349 TWL4030_INTERRUPTS_BCIISR1A);
350 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs2,
351 TWL4030_INTERRUPTS_BCIISR2A);
356 static void twl4030_bci_usb_work(struct work_struct *data)
358 struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
360 switch (bci->event) {
362 case USB_EVENT_CHARGER:
363 twl4030_charger_enable_usb(bci, true);
366 twl4030_charger_enable_usb(bci, false);
371 static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
374 struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, otg_nb);
376 dev_dbg(bci->dev, "OTG notify %lu\n", val);
379 schedule_work(&bci->work);
385 * TI provided formulas:
386 * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
387 * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
388 * Here we use integer approximation of:
389 * CGAIN == 0: val * 1.6618 - 0.85
390 * CGAIN == 1: (val * 1.6618 - 0.85) * 2
392 static int twl4030_charger_get_current(void)
398 curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
402 ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
406 ret = (curr * 16618 - 850 * 10000) / 10;
407 if (bcictl1 & TWL4030_CGAIN)
413 static ssize_t twl4030_bci_ac_show_enable(struct device *dev,
414 struct device_attribute *attr,
420 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
421 TWL4030_PM_MASTER_BOOT_BCI);
425 return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOAC) ? 1 : 0);
428 static ssize_t twl4030_bci_ac_store_enable(struct device *dev,
429 struct device_attribute *attr,
430 const char *buf, size_t count)
432 struct power_supply *psy = dev_get_drvdata(dev);
433 struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, ac);
434 unsigned long enable;
437 ret = strict_strtoul(buf, 10, &enable);
438 if (ret || enable > 1)
441 bci->ac_charge_enable = enable;
442 twl4030_charger_enable_ac(enable);
446 static struct device_attribute dev_attr_enable_ac =
447 __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_ac_show_enable,
448 twl4030_bci_ac_store_enable);
450 static ssize_t twl4030_bci_usb_show_enable(struct device *dev,
451 struct device_attribute *attr,
457 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
458 TWL4030_PM_MASTER_BOOT_BCI);
462 return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOUSB) ? 1 : 0);
465 static ssize_t twl4030_bci_usb_store_enable(struct device *dev,
466 struct device_attribute *attr,
467 const char *buf, size_t count)
469 struct power_supply *psy = dev_get_drvdata(dev);
470 struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, usb);
471 unsigned long enable;
474 ret = strict_strtoul(buf, 10, &enable);
475 if (ret || enable > 1)
478 bci->usb_charge_enable = enable;
479 twl4030_charger_enable_usb(bci, enable);
483 static struct device_attribute dev_attr_enable_usb =
484 __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_usb_show_enable,
485 twl4030_bci_usb_store_enable);
487 static ssize_t show_charge_current(struct device *dev,
488 struct device_attribute *attr, char *buf)
493 val = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
496 ret = twl4030_bci_read(TWL4030_BCICTL1, &ctl);
501 if (ctl & TWL4030_CGAIN)
504 return sprintf(buf, "%d\n", val);
507 static ssize_t store_charge_current(struct device *dev,
508 struct device_attribute *attr, const char *buf,
511 struct power_supply *psy = dev_get_drvdata(dev);
512 struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
513 unsigned long new_current;
516 ret = strict_strtoul(buf, 10, &new_current);
520 ret = set_charge_current(bci, new_current);
524 if (bci->current_supply == POWER_SUPPLY_TYPE_MAINS)
525 bci->ac_current = new_current;
527 bci->usb_current = new_current;
531 static DEVICE_ATTR(charge_current, S_IRUGO | S_IWUSR, show_charge_current,
532 store_charge_current);
534 static struct attribute *bci_ac_attrs[] = {
535 &dev_attr_enable_ac.attr,
536 &dev_attr_charge_current.attr,
540 static struct attribute *bci_usb_attrs[] = {
541 &dev_attr_enable_usb.attr,
542 &dev_attr_charge_current.attr,
546 static const struct attribute_group bci_ac_attr_group = {
547 .attrs = bci_ac_attrs,
550 static const struct attribute_group bci_usb_attr_group = {
551 .attrs = bci_usb_attrs,
555 * Returns the main charge FSM state
558 static int twl4030bci_state(struct twl4030_bci *bci)
563 ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
565 pr_err("twl4030_bci: error reading BCIMSTATEC\n");
569 dev_dbg(bci->dev, "state: %02x\n", state);
574 static int twl4030_bci_state_to_status(int state)
576 state &= TWL4030_MSTATEC_MASK;
577 if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
578 return POWER_SUPPLY_STATUS_CHARGING;
579 else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
580 state <= TWL4030_MSTATEC_COMPLETE4)
581 return POWER_SUPPLY_STATUS_FULL;
583 return POWER_SUPPLY_STATUS_NOT_CHARGING;
586 static int twl4030_bci_get_property(struct power_supply *psy,
587 enum power_supply_property psp,
588 union power_supply_propval *val)
590 struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
595 state = twl4030bci_state(bci);
599 if (psy->type == POWER_SUPPLY_TYPE_USB)
600 is_charging = state & TWL4030_MSTATEC_USB;
602 is_charging = state & TWL4030_MSTATEC_AC;
603 if (is_charging && psy->type != bci->current_supply) {
604 if (psy->type == POWER_SUPPLY_TYPE_USB)
605 set_charge_current(bci, bci->usb_current);
607 set_charge_current(bci, bci->ac_current);
608 bci->current_supply = psy->type;
612 case POWER_SUPPLY_PROP_STATUS:
614 val->intval = twl4030_bci_state_to_status(state);
616 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
618 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
619 /* charging must be active for meaningful result */
622 if (psy->type == POWER_SUPPLY_TYPE_USB) {
623 ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
626 /* BCIVBUS uses ADCIN8, 7/1023 V/step */
627 val->intval = ret * 6843;
629 ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
632 /* BCIVAC uses ADCIN11, 10/1023 V/step */
633 val->intval = ret * 9775;
636 case POWER_SUPPLY_PROP_CURRENT_NOW:
639 /* current measurement is shared between AC and USB */
640 ret = twl4030_charger_get_current();
645 case POWER_SUPPLY_PROP_ONLINE:
646 val->intval = is_charging &&
647 twl4030_bci_state_to_status(state) !=
648 POWER_SUPPLY_STATUS_NOT_CHARGING;
657 static enum power_supply_property twl4030_charger_props[] = {
658 POWER_SUPPLY_PROP_STATUS,
659 POWER_SUPPLY_PROP_ONLINE,
660 POWER_SUPPLY_PROP_VOLTAGE_NOW,
661 POWER_SUPPLY_PROP_CURRENT_NOW,
664 static int __init twl4030_bci_probe(struct platform_device *pdev)
666 const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
667 struct twl4030_bci *bci;
672 dev_err(&pdev->dev, "No platform data\n");
676 bci = kzalloc(sizeof(*bci), GFP_KERNEL);
680 bci->dev = &pdev->dev;
681 bci->irq_chg = platform_get_irq(pdev, 0);
682 bci->irq_bci = platform_get_irq(pdev, 1);
683 bci->ac_current = 860; /* ~1.2A */
684 bci->usb_current = 360; /* ~600mA */
686 platform_set_drvdata(pdev, bci);
688 ratelimit_state_init(&bci->ratelimit, HZ, 2);
690 bci->ac.name = "twl4030_ac";
691 bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
692 bci->ac.properties = twl4030_charger_props;
693 bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
694 bci->ac.get_property = twl4030_bci_get_property;
695 bci->ac.supplied_to = pdata->supplied_to;
696 bci->ac.num_supplicants = pdata->num_supplicants;
698 ret = power_supply_register(&pdev->dev, &bci->ac);
700 dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
701 goto fail_register_ac;
704 bci->usb.name = "twl4030_usb";
705 bci->usb.type = POWER_SUPPLY_TYPE_USB;
706 bci->usb.properties = twl4030_charger_props;
707 bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
708 bci->usb.get_property = twl4030_bci_get_property;
709 bci->usb.supplied_to = pdata->supplied_to;
710 bci->usb.num_supplicants = pdata->num_supplicants;
712 ret = power_supply_register(&pdev->dev, &bci->usb);
714 dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
715 goto fail_register_usb;
718 ret = request_threaded_irq(bci->irq_chg, NULL,
719 twl4030_charger_interrupt, 0, pdev->name, bci);
721 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
726 ret = request_threaded_irq(bci->irq_bci, NULL,
727 twl4030_bci_interrupt, 0, pdev->name, bci);
729 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
734 INIT_WORK(&bci->work, twl4030_bci_usb_work);
736 bci->transceiver = otg_get_transceiver();
737 if (bci->transceiver != NULL) {
738 bci->otg_nb.notifier_call = twl4030_bci_usb_ncb;
739 otg_register_notifier(bci->transceiver, &bci->otg_nb);
742 ret = sysfs_create_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
744 dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
748 ret = sysfs_create_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
750 dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
754 /* Enable interrupts now. */
755 reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
756 TWL4030_TBATOR1 | TWL4030_BATSTS);
757 ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
758 TWL4030_INTERRUPTS_BCIIMR1A);
760 dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
761 goto fail_unmask_interrupts;
764 reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
765 ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
766 TWL4030_INTERRUPTS_BCIIMR2A);
768 dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
770 bci->ac_charge_enable = true;
771 bci->usb_charge_enable = true;
772 twl4030_charger_enable_ac(true);
773 twl4030_charger_enable_usb(bci, true);
777 fail_unmask_interrupts:
778 sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
780 sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
782 if (bci->transceiver != NULL) {
783 otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
784 otg_put_transceiver(bci->transceiver);
786 free_irq(bci->irq_bci, bci);
788 free_irq(bci->irq_chg, bci);
790 power_supply_unregister(&bci->usb);
792 power_supply_unregister(&bci->ac);
794 platform_set_drvdata(pdev, NULL);
800 static int __exit twl4030_bci_remove(struct platform_device *pdev)
802 struct twl4030_bci *bci = platform_get_drvdata(pdev);
804 sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
805 sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
807 twl4030_charger_enable_ac(false);
808 twl4030_charger_enable_usb(bci, false);
810 /* mask interrupts */
811 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
812 TWL4030_INTERRUPTS_BCIIMR1A);
813 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
814 TWL4030_INTERRUPTS_BCIIMR2A);
816 if (bci->transceiver != NULL) {
817 otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
818 otg_put_transceiver(bci->transceiver);
820 free_irq(bci->irq_bci, bci);
821 free_irq(bci->irq_chg, bci);
822 power_supply_unregister(&bci->usb);
823 power_supply_unregister(&bci->ac);
824 platform_set_drvdata(pdev, NULL);
830 static struct platform_driver twl4030_bci_driver = {
832 .name = "twl4030_bci",
833 .owner = THIS_MODULE,
835 .remove = __exit_p(twl4030_bci_remove),
838 static int __init twl4030_bci_init(void)
840 return platform_driver_probe(&twl4030_bci_driver, twl4030_bci_probe);
842 module_init(twl4030_bci_init);
844 static void __exit twl4030_bci_exit(void)
846 platform_driver_unregister(&twl4030_bci_driver);
848 module_exit(twl4030_bci_exit);
850 MODULE_AUTHOR("Gražvydas Ignotas");
851 MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
852 MODULE_LICENSE("GPL");
853 MODULE_ALIAS("platform:twl4030_bci");