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>
25 #include <linux/regulator/machine.h>
27 #define TWL4030_BCIMSTATEC 0x02
28 #define TWL4030_BCIICHG 0x08
29 #define TWL4030_BCIVAC 0x0a
30 #define TWL4030_BCIVBUS 0x0c
31 #define TWL4030_BCIMFSTS3 0x0f
32 #define TWL4030_BCIMFSTS4 0x10
33 #define TWL4030_BCIMFKEY 0x11
34 #define TWL4030_BCICTL1 0x23
35 #define TWL4030_BCIIREF1 0x27
36 #define TWL4030_BCIIREF2 0x28
38 #define TWL4030_BCIAUTOWEN BIT(5)
39 #define TWL4030_CONFIG_DONE BIT(4)
40 #define TWL4030_CVENAC BIT(2)
41 #define TWL4030_BCIAUTOUSB BIT(1)
42 #define TWL4030_BCIAUTOAC BIT(0)
43 #define TWL4030_CGAIN BIT(5)
44 #define TWL4030_USBFASTMCHG BIT(2)
45 #define TWL4030_STS_VBUS BIT(7)
46 #define TWL4030_STS_USB_ID BIT(2)
47 #define TWL4030_STS_CHG BIT(1)
50 #define TWL4030_WOVF BIT(0) /* Watchdog overflow */
51 #define TWL4030_TMOVF BIT(1) /* Timer overflow */
52 #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */
53 #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */
54 #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */
55 #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */
56 #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */
57 #define TWL4030_BATSTS BIT(7) /* Battery status */
59 #define TWL4030_VBATLVL BIT(0) /* VBAT level */
60 #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */
61 #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */
62 #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */
64 #define TWL4030_MSTATEC_USB BIT(4)
65 #define TWL4030_MSTATEC_AC BIT(5)
66 #define TWL4030_MSTATEC_MASK 0x0f
67 #define TWL4030_MSTATEC_QUICK1 0x02
68 #define TWL4030_MSTATEC_QUICK7 0x07
69 #define TWL4030_MSTATEC_COMPLETE1 0x0b
70 #define TWL4030_MSTATEC_COMPLETE4 0x0e
72 #define TWL4030_KEY_IIREF 0xe7
73 #define TWL4030_BATSTSMCHG BIT(6)
75 static bool allow_usb = 1;
76 module_param(allow_usb, bool, 0644);
77 MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
81 struct power_supply ac;
82 struct power_supply usb;
83 struct otg_transceiver *transceiver;
84 struct notifier_block otg_nb;
85 struct work_struct work;
88 bool ac_charge_enable;
89 bool usb_charge_enable;
92 enum power_supply_type current_supply;
93 struct regulator *usb_reg;
98 struct ratelimit_state ratelimit;
102 * clear and set bits on an given register on a given module
104 static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg)
109 ret = twl_i2c_read_u8(mod_no, &val, reg);
116 return twl_i2c_write_u8(mod_no, val, reg);
119 static int twl4030_bci_read(u8 reg, u8 *val)
121 return twl_i2c_read_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
124 static int twl4030_bci_write(u8 reg, u8 val)
126 return twl_i2c_write_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
129 static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
131 return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, clear,
132 TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
133 TWL4030_PM_MASTER_BOOT_BCI);
136 static int twl4030bci_read_adc_val(u8 reg)
142 ret = twl4030_bci_read(reg + 1, &val);
146 temp = (int)(val & 0x03) << 8;
149 ret = twl4030_bci_read(reg, &val);
157 * Check if VBUS power is present
159 static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
164 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hwsts,
165 TWL4030_PM_MASTER_STS_HW_CONDITIONS);
169 dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts);
171 /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */
172 if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID))
179 * Enable/Disable USB Charge functionality.
181 static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
186 if (!bci->usb_charge_enable)
189 /* Check for USB charger conneted */
190 if (!twl4030_bci_have_vbus(bci))
194 * Until we can find out what current the device can provide,
195 * require a module param to enable USB charging.
198 dev_warn(bci->dev, "USB charging is disabled.\n");
202 /* Need to keep regulator on */
203 if (!bci->usb_enabled &&
205 regulator_enable(bci->usb_reg) == 0)
206 bci->usb_enabled = 1;
208 /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
209 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
213 /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
214 ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE, 0,
215 TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
217 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
218 if (bci->usb_enabled &&
219 regulator_disable(bci->usb_reg) == 0)
220 bci->usb_enabled = 0;
227 * Enable/Disable AC Charge funtionality.
229 static int twl4030_charger_enable_ac(bool enable)
234 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
236 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
241 static int set_charge_current(struct twl4030_bci *bci, int new_current)
243 u8 val, boot_bci_prev, cgain_set, cgain_clear;
246 ret = twl4030_bci_read(TWL4030_BCIMFSTS3, &val);
250 if (!(val & TWL4030_BATSTSMCHG)) {
251 dev_err(bci->dev, "missing battery, can't change charge_current\n");
255 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci_prev,
256 TWL4030_PM_MASTER_BOOT_BCI);
261 * Stop automatic charging here, because charge current change
262 * requires multiple register writes and CGAIN change requires
263 * automatic charge to be stopped (and CV mode disabled too).
265 ret = twl4030_clear_set_boot_bci(
266 TWL4030_CVENAC | TWL4030_BCIAUTOAC | TWL4030_BCIAUTOUSB, 0);
270 ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
274 ret = twl4030_bci_write(TWL4030_BCIIREF1, new_current & 0xff);
278 ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
282 ret = twl4030_bci_write(TWL4030_BCIIREF2, (new_current >> 8) & 0x1);
286 /* Set CGAIN = 0 or 1 */
287 if (new_current > 511) {
288 cgain_set = TWL4030_CGAIN;
292 cgain_clear = TWL4030_CGAIN;
295 ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE,
296 cgain_clear, cgain_set, TWL4030_BCICTL1);
300 ret = twl4030_bci_read(TWL4030_BCICTL1, &val);
301 if (ret != 0 || (val & TWL4030_CGAIN) != cgain_set) {
302 dev_err(bci->dev, "CGAIN change failed\n");
307 ret2 = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, boot_bci_prev,
308 TWL4030_PM_MASTER_BOOT_BCI);
310 dev_err(bci->dev, "failed boot_bci restore: %d\n", ret2);
314 dev_err(bci->dev, "charge current change failed: %d\n", ret);
320 * TWL4030 CHG_PRES (AC charger presence) events
322 static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
324 struct twl4030_bci *bci = arg;
329 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hw_cond,
330 TWL4030_PM_MASTER_STS_HW_CONDITIONS);
332 dev_err(bci->dev, "HW_CONDITIONS read failed: %d\n", ret);
336 have_charger = (hw_cond & TWL4030_STS_CHG) ? 1 : 0;
337 if (have_charger == bci->irq_had_charger)
339 bci->irq_had_charger = have_charger;
341 dev_dbg(bci->dev, "CHG_PRES irq, hw_cond %02x\n", hw_cond);
342 power_supply_changed(&bci->ac);
343 power_supply_changed(&bci->usb);
350 * TWL4030 BCI monitoring events
352 static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
354 struct twl4030_bci *bci = arg;
358 ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
359 TWL4030_INTERRUPTS_BCIISR1A);
363 ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
364 TWL4030_INTERRUPTS_BCIISR2A);
368 dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
370 if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
371 /* charger state change, inform the core */
372 power_supply_changed(&bci->ac);
373 power_supply_changed(&bci->usb);
376 /* various monitoring events, for now we just log them here */
377 if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1) &&
378 __ratelimit(&bci->ratelimit))
379 dev_warn(bci->dev, "battery temperature out of range\n");
381 if (irqs1 & TWL4030_BATSTS && __ratelimit(&bci->ratelimit))
382 dev_crit(bci->dev, "battery disconnected\n");
384 if (irqs2 & TWL4030_VBATOV && __ratelimit(&bci->ratelimit))
385 dev_crit(bci->dev, "VBAT overvoltage\n");
387 if (irqs2 & TWL4030_VBUSOV && __ratelimit(&bci->ratelimit))
388 dev_crit(bci->dev, "VBUS overvoltage\n");
390 if (irqs2 & TWL4030_ACCHGOV && __ratelimit(&bci->ratelimit))
391 dev_crit(bci->dev, "Ac charger overvoltage\n");
393 /* ack the interrupts */
394 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs1,
395 TWL4030_INTERRUPTS_BCIISR1A);
396 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs2,
397 TWL4030_INTERRUPTS_BCIISR2A);
402 static void twl4030_bci_usb_work(struct work_struct *data)
404 struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
406 switch (bci->event) {
408 case USB_EVENT_CHARGER:
409 twl4030_charger_enable_usb(bci, true);
412 twl4030_charger_enable_usb(bci, false);
417 static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
420 struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, otg_nb);
422 dev_dbg(bci->dev, "OTG notify %lu\n", val);
425 schedule_work(&bci->work);
431 * TI provided formulas:
432 * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
433 * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
434 * Here we use integer approximation of:
435 * CGAIN == 0: val * 1.6618 - 0.85
436 * CGAIN == 1: (val * 1.6618 - 0.85) * 2
438 static int twl4030_charger_get_current(void)
444 curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
448 ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
452 ret = (curr * 16618 - 850 * 10000) / 10;
453 if (bcictl1 & TWL4030_CGAIN)
459 static ssize_t twl4030_bci_ac_show_enable(struct device *dev,
460 struct device_attribute *attr,
466 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
467 TWL4030_PM_MASTER_BOOT_BCI);
471 return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOAC) ? 1 : 0);
474 static ssize_t twl4030_bci_ac_store_enable(struct device *dev,
475 struct device_attribute *attr,
476 const char *buf, size_t count)
478 struct power_supply *psy = dev_get_drvdata(dev);
479 struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, ac);
480 unsigned long enable;
483 ret = strict_strtoul(buf, 10, &enable);
484 if (ret || enable > 1)
487 bci->ac_charge_enable = enable;
488 twl4030_charger_enable_ac(enable);
492 static struct device_attribute dev_attr_enable_ac =
493 __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_ac_show_enable,
494 twl4030_bci_ac_store_enable);
496 static ssize_t twl4030_bci_usb_show_enable(struct device *dev,
497 struct device_attribute *attr,
503 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
504 TWL4030_PM_MASTER_BOOT_BCI);
508 return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOUSB) ? 1 : 0);
511 static ssize_t twl4030_bci_usb_store_enable(struct device *dev,
512 struct device_attribute *attr,
513 const char *buf, size_t count)
515 struct power_supply *psy = dev_get_drvdata(dev);
516 struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, usb);
517 unsigned long enable;
520 ret = strict_strtoul(buf, 10, &enable);
521 if (ret || enable > 1)
524 bci->usb_charge_enable = enable;
525 twl4030_charger_enable_usb(bci, enable);
529 static struct device_attribute dev_attr_enable_usb =
530 __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_usb_show_enable,
531 twl4030_bci_usb_store_enable);
533 static ssize_t show_charge_current(struct device *dev,
534 struct device_attribute *attr, char *buf)
539 val = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
542 ret = twl4030_bci_read(TWL4030_BCICTL1, &ctl);
547 if (ctl & TWL4030_CGAIN)
550 return sprintf(buf, "%d\n", val);
553 static ssize_t store_charge_current(struct device *dev,
554 struct device_attribute *attr, const char *buf,
557 struct power_supply *psy = dev_get_drvdata(dev);
558 struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
559 unsigned long new_current;
562 ret = strict_strtoul(buf, 10, &new_current);
566 ret = set_charge_current(bci, new_current);
570 if (psy->type == POWER_SUPPLY_TYPE_MAINS)
571 bci->ac_current = new_current;
573 bci->usb_current = new_current;
577 static DEVICE_ATTR(charge_current, S_IRUGO | S_IWUSR, show_charge_current,
578 store_charge_current);
580 static struct attribute *bci_ac_attrs[] = {
581 &dev_attr_enable_ac.attr,
582 &dev_attr_charge_current.attr,
586 static struct attribute *bci_usb_attrs[] = {
587 &dev_attr_enable_usb.attr,
588 &dev_attr_charge_current.attr,
592 static const struct attribute_group bci_ac_attr_group = {
593 .attrs = bci_ac_attrs,
596 static const struct attribute_group bci_usb_attr_group = {
597 .attrs = bci_usb_attrs,
601 * Returns the main charge FSM state
604 static int twl4030bci_state(struct twl4030_bci *bci)
609 ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
611 pr_err("twl4030_bci: error reading BCIMSTATEC\n");
615 dev_dbg(bci->dev, "state: %02x\n", state);
620 static int twl4030_bci_state_to_status(int state)
622 state &= TWL4030_MSTATEC_MASK;
623 if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
624 return POWER_SUPPLY_STATUS_CHARGING;
625 else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
626 state <= TWL4030_MSTATEC_COMPLETE4)
627 return POWER_SUPPLY_STATUS_FULL;
629 return POWER_SUPPLY_STATUS_NOT_CHARGING;
632 static int twl4030_bci_get_property(struct power_supply *psy,
633 enum power_supply_property psp,
634 union power_supply_propval *val)
636 struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
641 state = twl4030bci_state(bci);
645 if (psy->type == POWER_SUPPLY_TYPE_USB)
646 is_charging = state & TWL4030_MSTATEC_USB;
648 is_charging = state & TWL4030_MSTATEC_AC;
649 if (is_charging && psy->type != bci->current_supply) {
650 if (psy->type == POWER_SUPPLY_TYPE_USB)
651 set_charge_current(bci, bci->usb_current);
653 set_charge_current(bci, bci->ac_current);
654 bci->current_supply = psy->type;
658 case POWER_SUPPLY_PROP_STATUS:
660 val->intval = twl4030_bci_state_to_status(state);
662 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
664 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
665 /* charging must be active for meaningful result */
668 if (psy->type == POWER_SUPPLY_TYPE_USB) {
669 ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
672 /* BCIVBUS uses ADCIN8, 7/1023 V/step */
673 val->intval = ret * 6843;
675 ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
678 /* BCIVAC uses ADCIN11, 10/1023 V/step */
679 val->intval = ret * 9775;
682 case POWER_SUPPLY_PROP_CURRENT_NOW:
685 /* current measurement is shared between AC and USB */
686 ret = twl4030_charger_get_current();
691 case POWER_SUPPLY_PROP_ONLINE:
692 val->intval = is_charging &&
693 twl4030_bci_state_to_status(state) !=
694 POWER_SUPPLY_STATUS_NOT_CHARGING;
703 static enum power_supply_property twl4030_charger_props[] = {
704 POWER_SUPPLY_PROP_STATUS,
705 POWER_SUPPLY_PROP_ONLINE,
706 POWER_SUPPLY_PROP_VOLTAGE_NOW,
707 POWER_SUPPLY_PROP_CURRENT_NOW,
710 static int __init twl4030_bci_probe(struct platform_device *pdev)
712 const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
713 struct twl4030_bci *bci;
718 dev_err(&pdev->dev, "No platform data\n");
722 bci = kzalloc(sizeof(*bci), GFP_KERNEL);
726 bci->dev = &pdev->dev;
727 bci->irq_chg = platform_get_irq(pdev, 0);
728 bci->irq_bci = platform_get_irq(pdev, 1);
729 bci->ac_current = 860; /* ~1.2A */
730 bci->usb_current = 360; /* ~600mA */
731 bci->irq_had_charger = -1;
733 platform_set_drvdata(pdev, bci);
735 ratelimit_state_init(&bci->ratelimit, HZ, 2);
737 bci->ac.name = "twl4030_ac";
738 bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
739 bci->ac.properties = twl4030_charger_props;
740 bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
741 bci->ac.get_property = twl4030_bci_get_property;
742 bci->ac.supplied_to = pdata->supplied_to;
743 bci->ac.num_supplicants = pdata->num_supplicants;
745 ret = power_supply_register(&pdev->dev, &bci->ac);
747 dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
748 goto fail_register_ac;
751 bci->usb.name = "twl4030_usb";
752 bci->usb.type = POWER_SUPPLY_TYPE_USB;
753 bci->usb.properties = twl4030_charger_props;
754 bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
755 bci->usb.get_property = twl4030_bci_get_property;
756 bci->usb.supplied_to = pdata->supplied_to;
757 bci->usb.num_supplicants = pdata->num_supplicants;
759 bci->usb_reg = regulator_get(bci->dev, "bci3v1");
760 if (IS_ERR(bci->usb_reg)) {
761 dev_warn(&pdev->dev, "regulator get bci3v1 failed\n");
765 ret = power_supply_register(&pdev->dev, &bci->usb);
767 dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
768 goto fail_register_usb;
771 ret = request_threaded_irq(bci->irq_chg, NULL,
772 twl4030_charger_interrupt, 0, pdev->name, bci);
774 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
779 ret = request_threaded_irq(bci->irq_bci, NULL,
780 twl4030_bci_interrupt, 0, pdev->name, bci);
782 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
787 INIT_WORK(&bci->work, twl4030_bci_usb_work);
789 bci->transceiver = otg_get_transceiver();
790 if (bci->transceiver != NULL) {
791 bci->otg_nb.notifier_call = twl4030_bci_usb_ncb;
792 otg_register_notifier(bci->transceiver, &bci->otg_nb);
795 ret = sysfs_create_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
797 dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
801 ret = sysfs_create_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
803 dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
807 /* Enable interrupts now. */
808 reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
809 TWL4030_TBATOR1 | TWL4030_BATSTS);
810 ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
811 TWL4030_INTERRUPTS_BCIIMR1A);
813 dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
814 goto fail_unmask_interrupts;
817 reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
818 ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
819 TWL4030_INTERRUPTS_BCIIMR2A);
821 dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
823 bci->ac_charge_enable = true;
824 bci->usb_charge_enable = true;
825 twl4030_charger_enable_ac(true);
826 twl4030_charger_enable_usb(bci, true);
830 fail_unmask_interrupts:
831 sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
833 sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
835 if (bci->transceiver != NULL) {
836 otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
837 otg_put_transceiver(bci->transceiver);
839 free_irq(bci->irq_bci, bci);
841 free_irq(bci->irq_chg, bci);
843 power_supply_unregister(&bci->usb);
845 power_supply_unregister(&bci->ac);
847 platform_set_drvdata(pdev, NULL);
853 static int __exit twl4030_bci_remove(struct platform_device *pdev)
855 struct twl4030_bci *bci = platform_get_drvdata(pdev);
857 sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
858 sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
860 twl4030_charger_enable_ac(false);
861 twl4030_charger_enable_usb(bci, false);
863 /* mask interrupts */
864 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
865 TWL4030_INTERRUPTS_BCIIMR1A);
866 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
867 TWL4030_INTERRUPTS_BCIIMR2A);
869 if (bci->transceiver != NULL) {
870 otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
871 otg_put_transceiver(bci->transceiver);
873 free_irq(bci->irq_bci, bci);
874 free_irq(bci->irq_chg, bci);
875 power_supply_unregister(&bci->usb);
876 power_supply_unregister(&bci->ac);
877 platform_set_drvdata(pdev, NULL);
883 static struct platform_driver twl4030_bci_driver = {
885 .name = "twl4030_bci",
886 .owner = THIS_MODULE,
888 .remove = __exit_p(twl4030_bci_remove),
891 static int __init twl4030_bci_init(void)
893 return platform_driver_probe(&twl4030_bci_driver, twl4030_bci_probe);
895 module_init(twl4030_bci_init);
897 static void __exit twl4030_bci_exit(void)
899 platform_driver_unregister(&twl4030_bci_driver);
901 module_exit(twl4030_bci_exit);
903 MODULE_AUTHOR("Gražvydas Ignotas");
904 MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
905 MODULE_LICENSE("GPL");
906 MODULE_ALIAS("platform:twl4030_bci");