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>
26 #include <linux/leds.h>
28 #define TWL4030_BCIMSTATEC 0x02
29 #define TWL4030_BCIICHG 0x08
30 #define TWL4030_BCIVAC 0x0a
31 #define TWL4030_BCIVBUS 0x0c
32 #define TWL4030_BCIMFSTS3 0x0f
33 #define TWL4030_BCIMFSTS4 0x10
34 #define TWL4030_BCIMFKEY 0x11
35 #define TWL4030_BCICTL1 0x23
36 #define TWL4030_BCIIREF1 0x27
37 #define TWL4030_BCIIREF2 0x28
39 #define TWL4030_BCIAUTOWEN BIT(5)
40 #define TWL4030_CONFIG_DONE BIT(4)
41 #define TWL4030_CVENAC BIT(2)
42 #define TWL4030_BCIAUTOUSB BIT(1)
43 #define TWL4030_BCIAUTOAC BIT(0)
44 #define TWL4030_CGAIN BIT(5)
45 #define TWL4030_USBFASTMCHG BIT(2)
46 #define TWL4030_STS_VBUS BIT(7)
47 #define TWL4030_STS_USB_ID BIT(2)
48 #define TWL4030_STS_CHG BIT(1)
51 #define TWL4030_WOVF BIT(0) /* Watchdog overflow */
52 #define TWL4030_TMOVF BIT(1) /* Timer overflow */
53 #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */
54 #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */
55 #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */
56 #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */
57 #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */
58 #define TWL4030_BATSTS BIT(7) /* Battery status */
60 #define TWL4030_VBATLVL BIT(0) /* VBAT level */
61 #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */
62 #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */
63 #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */
65 #define TWL4030_MSTATEC_USB BIT(4)
66 #define TWL4030_MSTATEC_AC BIT(5)
67 #define TWL4030_MSTATEC_MASK 0x0f
68 #define TWL4030_MSTATEC_QUICK1 0x02
69 #define TWL4030_MSTATEC_QUICK7 0x07
70 #define TWL4030_MSTATEC_COMPLETE1 0x0b
71 #define TWL4030_MSTATEC_COMPLETE4 0x0e
73 #define TWL4030_KEY_IIREF 0xe7
74 #define TWL4030_BATSTSMCHG BIT(6)
76 #define IRQ_CHECK_PERIOD (3 * HZ)
77 #define IRQ_CHECK_THRESHOLD 4
79 static bool allow_usb = 1;
80 module_param(allow_usb, bool, 0644);
81 MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
85 struct power_supply ac;
86 struct power_supply usb;
87 struct otg_transceiver *transceiver;
88 struct notifier_block otg_nb;
89 struct work_struct work;
92 bool ac_charge_enable;
93 bool usb_charge_enable;
96 enum power_supply_type current_supply;
97 struct regulator *usb_reg;
101 unsigned long irq_check_count_time;
103 int irq_check_ac_disabled;
105 struct led_trigger *charging_any_trig;
106 int was_charging_any;
109 struct ratelimit_state ratelimit;
113 * clear and set bits on an given register on a given module
115 static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg)
120 ret = twl_i2c_read_u8(mod_no, &val, reg);
127 return twl_i2c_write_u8(mod_no, val, reg);
130 static int twl4030_bci_read(u8 reg, u8 *val)
132 return twl_i2c_read_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
135 static int twl4030_bci_write(u8 reg, u8 val)
137 return twl_i2c_write_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
140 static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
142 return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, clear,
143 TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
144 TWL4030_PM_MASTER_BOOT_BCI);
147 static int twl4030bci_read_adc_val(u8 reg)
153 ret = twl4030_bci_read(reg + 1, &val);
157 temp = (int)(val & 0x03) << 8;
160 ret = twl4030_bci_read(reg, &val);
168 * Check if VBUS power is present
170 static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
175 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hwsts,
176 TWL4030_PM_MASTER_STS_HW_CONDITIONS);
180 dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts);
182 /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */
183 if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID))
190 * Enable/Disable USB Charge functionality.
192 static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
197 if (!bci->usb_charge_enable)
200 /* Check for USB charger conneted */
201 if (!twl4030_bci_have_vbus(bci))
205 * Until we can find out what current the device can provide,
206 * require a module param to enable USB charging.
209 dev_warn(bci->dev, "USB charging is disabled.\n");
213 /* Need to keep regulator on */
214 if (!bci->usb_enabled &&
216 regulator_enable(bci->usb_reg) == 0)
217 bci->usb_enabled = 1;
219 /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
220 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
224 /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
225 ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE, 0,
226 TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
228 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
229 if (bci->usb_enabled &&
230 regulator_disable(bci->usb_reg) == 0)
231 bci->usb_enabled = 0;
238 * Enable/Disable AC Charge funtionality.
240 static int twl4030_charger_enable_ac(bool enable)
245 ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
247 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
252 static int set_charge_current(struct twl4030_bci *bci, int new_current)
254 u8 val, boot_bci_prev, cgain_set, cgain_clear;
257 ret = twl4030_bci_read(TWL4030_BCIMFSTS3, &val);
261 if (!(val & TWL4030_BATSTSMCHG)) {
262 dev_err(bci->dev, "missing battery, can't change charge_current\n");
266 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci_prev,
267 TWL4030_PM_MASTER_BOOT_BCI);
272 * Stop automatic charging here, because charge current change
273 * requires multiple register writes and CGAIN change requires
274 * automatic charge to be stopped (and CV mode disabled too).
276 ret = twl4030_clear_set_boot_bci(
277 TWL4030_CVENAC | TWL4030_BCIAUTOAC | TWL4030_BCIAUTOUSB, 0);
281 ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
285 ret = twl4030_bci_write(TWL4030_BCIIREF1, new_current & 0xff);
289 ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
293 ret = twl4030_bci_write(TWL4030_BCIIREF2, (new_current >> 8) & 0x1);
297 /* Set CGAIN = 0 or 1 */
298 if (new_current > 511) {
299 cgain_set = TWL4030_CGAIN;
303 cgain_clear = TWL4030_CGAIN;
306 ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE,
307 cgain_clear, cgain_set, TWL4030_BCICTL1);
311 ret = twl4030_bci_read(TWL4030_BCICTL1, &val);
312 if (ret != 0 || (val & TWL4030_CGAIN) != cgain_set) {
313 dev_err(bci->dev, "CGAIN change failed\n");
318 ret2 = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, boot_bci_prev,
319 TWL4030_PM_MASTER_BOOT_BCI);
321 dev_err(bci->dev, "failed boot_bci restore: %d\n", ret2);
325 dev_err(bci->dev, "charge current change failed: %d\n", ret);
331 * TWL4030 CHG_PRES (AC charger presence) events
333 static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
335 struct twl4030_bci *bci = arg;
340 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hw_cond,
341 TWL4030_PM_MASTER_STS_HW_CONDITIONS);
343 dev_err(bci->dev, "HW_CONDITIONS read failed: %d\n", ret);
347 have_charger = (hw_cond & TWL4030_STS_CHG) ? 1 : 0;
348 if (have_charger == bci->irq_had_charger)
350 bci->irq_had_charger = have_charger;
352 dev_dbg(bci->dev, "CHG_PRES irq, hw_cond %02x\n", hw_cond);
355 * deal with rare mysterious issue of CHG_PRES changing states at ~4Hz
356 * without any charger connected or anything
358 if (time_before(jiffies, bci->irq_check_count_time + IRQ_CHECK_PERIOD)) {
359 bci->irq_check_count++;
360 if (have_charger && bci->irq_check_count > IRQ_CHECK_THRESHOLD) {
361 dev_err(bci->dev, "spurious CHG_PRES irqs detected (%d), disabling charger\n",
362 bci->irq_check_count);
363 twl4030_charger_enable_ac(false);
364 bci->irq_check_ac_disabled = true;
367 bci->irq_check_count_time = jiffies;
368 bci->irq_check_count = 1;
369 if (have_charger && bci->irq_check_ac_disabled) {
370 twl4030_charger_enable_ac(true);
371 bci->irq_check_ac_disabled = false;
375 power_supply_changed(&bci->ac);
376 power_supply_changed(&bci->usb);
383 * TWL4030 BCI monitoring events
385 static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
387 struct twl4030_bci *bci = arg;
391 ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
392 TWL4030_INTERRUPTS_BCIISR1A);
396 ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
397 TWL4030_INTERRUPTS_BCIISR2A);
401 dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
403 if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
404 /* charger state change, inform the core */
405 power_supply_changed(&bci->ac);
406 power_supply_changed(&bci->usb);
409 /* various monitoring events, for now we just log them here */
410 if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1) &&
411 __ratelimit(&bci->ratelimit))
412 dev_warn(bci->dev, "battery temperature out of range\n");
414 if (irqs1 & TWL4030_BATSTS && __ratelimit(&bci->ratelimit))
415 dev_crit(bci->dev, "battery disconnected\n");
417 if (irqs2 & TWL4030_VBATOV && __ratelimit(&bci->ratelimit))
418 dev_crit(bci->dev, "VBAT overvoltage\n");
420 if (irqs2 & TWL4030_VBUSOV && __ratelimit(&bci->ratelimit))
421 dev_crit(bci->dev, "VBUS overvoltage\n");
423 if (irqs2 & TWL4030_ACCHGOV && __ratelimit(&bci->ratelimit))
424 dev_crit(bci->dev, "Ac charger overvoltage\n");
427 /* ack the interrupts */
428 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs1,
429 TWL4030_INTERRUPTS_BCIISR1A);
430 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs2,
431 TWL4030_INTERRUPTS_BCIISR2A);
437 static void twl4030_bci_usb_work(struct work_struct *data)
439 struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
441 switch (bci->event) {
443 case USB_EVENT_CHARGER:
444 twl4030_charger_enable_usb(bci, true);
447 twl4030_charger_enable_usb(bci, false);
452 static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
455 struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, otg_nb);
457 dev_dbg(bci->dev, "OTG notify %lu\n", val);
460 schedule_work(&bci->work);
466 * TI provided formulas:
467 * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
468 * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
469 * Here we use integer approximation of:
470 * CGAIN == 0: val * 1.6618 - 0.85
471 * CGAIN == 1: (val * 1.6618 - 0.85) * 2
473 static int twl4030_charger_get_current(void)
479 curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
483 ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
487 ret = (curr * 16618 - 850 * 10000) / 10;
488 if (bcictl1 & TWL4030_CGAIN)
494 static ssize_t twl4030_bci_ac_show_enable(struct device *dev,
495 struct device_attribute *attr,
501 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
502 TWL4030_PM_MASTER_BOOT_BCI);
506 return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOAC) ? 1 : 0);
509 static ssize_t twl4030_bci_ac_store_enable(struct device *dev,
510 struct device_attribute *attr,
511 const char *buf, size_t count)
513 struct power_supply *psy = dev_get_drvdata(dev);
514 struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, ac);
515 unsigned long enable;
518 ret = strict_strtoul(buf, 10, &enable);
519 if (ret || enable > 1)
522 bci->ac_charge_enable = enable;
523 twl4030_charger_enable_ac(enable);
527 static struct device_attribute dev_attr_enable_ac =
528 __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_ac_show_enable,
529 twl4030_bci_ac_store_enable);
531 static ssize_t twl4030_bci_usb_show_enable(struct device *dev,
532 struct device_attribute *attr,
538 ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
539 TWL4030_PM_MASTER_BOOT_BCI);
543 return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOUSB) ? 1 : 0);
546 static ssize_t twl4030_bci_usb_store_enable(struct device *dev,
547 struct device_attribute *attr,
548 const char *buf, size_t count)
550 struct power_supply *psy = dev_get_drvdata(dev);
551 struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, usb);
552 unsigned long enable;
555 ret = strict_strtoul(buf, 10, &enable);
556 if (ret || enable > 1)
559 bci->usb_charge_enable = enable;
560 twl4030_charger_enable_usb(bci, enable);
564 static struct device_attribute dev_attr_enable_usb =
565 __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_usb_show_enable,
566 twl4030_bci_usb_store_enable);
568 static ssize_t show_charge_current(struct device *dev,
569 struct device_attribute *attr, char *buf)
574 val = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
577 ret = twl4030_bci_read(TWL4030_BCICTL1, &ctl);
582 if (ctl & TWL4030_CGAIN)
585 return sprintf(buf, "%d\n", val);
588 static ssize_t store_charge_current(struct device *dev,
589 struct device_attribute *attr, const char *buf,
592 struct power_supply *psy = dev_get_drvdata(dev);
593 struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
594 unsigned long new_current;
597 ret = strict_strtoul(buf, 10, &new_current);
601 ret = set_charge_current(bci, new_current);
605 if (psy->type == POWER_SUPPLY_TYPE_MAINS)
606 bci->ac_current = new_current;
608 bci->usb_current = new_current;
612 static DEVICE_ATTR(charge_current, S_IRUGO | S_IWUSR, show_charge_current,
613 store_charge_current);
615 static struct attribute *bci_ac_attrs[] = {
616 &dev_attr_enable_ac.attr,
617 &dev_attr_charge_current.attr,
621 static struct attribute *bci_usb_attrs[] = {
622 &dev_attr_enable_usb.attr,
623 &dev_attr_charge_current.attr,
627 static const struct attribute_group bci_ac_attr_group = {
628 .attrs = bci_ac_attrs,
631 static const struct attribute_group bci_usb_attr_group = {
632 .attrs = bci_usb_attrs,
636 * Returns the main charge FSM state
639 static int twl4030bci_state(struct twl4030_bci *bci)
644 ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
646 pr_err("twl4030_bci: error reading BCIMSTATEC\n");
650 dev_dbg(bci->dev, "state: %02x\n", state);
655 static int twl4030_bci_state_to_status(int state)
657 state &= TWL4030_MSTATEC_MASK;
658 if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
659 return POWER_SUPPLY_STATUS_CHARGING;
660 else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
661 state <= TWL4030_MSTATEC_COMPLETE4)
662 return POWER_SUPPLY_STATUS_FULL;
664 return POWER_SUPPLY_STATUS_NOT_CHARGING;
667 static int twl4030_bci_get_property(struct power_supply *psy,
668 enum power_supply_property psp,
669 union power_supply_propval *val)
671 struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
672 int is_charging_any = 0;
677 state = twl4030bci_state(bci);
681 if (twl4030_bci_state_to_status(state) ==
682 POWER_SUPPLY_STATUS_CHARGING) {
684 state & (TWL4030_MSTATEC_USB | TWL4030_MSTATEC_AC);
685 if (psy->type == POWER_SUPPLY_TYPE_USB)
686 is_charging = state & TWL4030_MSTATEC_USB;
688 is_charging = state & TWL4030_MSTATEC_AC;
691 if (is_charging_any != bci->was_charging_any) {
692 led_trigger_event(bci->charging_any_trig,
693 is_charging_any ? LED_FULL : LED_OFF);
694 bci->was_charging_any = is_charging_any;
697 if (is_charging && psy->type != bci->current_supply) {
698 if (psy->type == POWER_SUPPLY_TYPE_USB)
699 set_charge_current(bci, bci->usb_current);
701 set_charge_current(bci, bci->ac_current);
702 bci->current_supply = psy->type;
706 case POWER_SUPPLY_PROP_STATUS:
708 val->intval = twl4030_bci_state_to_status(state);
710 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
712 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
713 /* charging must be active for meaningful result */
716 if (psy->type == POWER_SUPPLY_TYPE_USB) {
717 ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
720 /* BCIVBUS uses ADCIN8, 7/1023 V/step */
721 val->intval = ret * 6843;
723 ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
726 /* BCIVAC uses ADCIN11, 10/1023 V/step */
727 val->intval = ret * 9775;
730 case POWER_SUPPLY_PROP_CURRENT_NOW:
733 /* current measurement is shared between AC and USB */
734 ret = twl4030_charger_get_current();
739 case POWER_SUPPLY_PROP_ONLINE:
740 val->intval = is_charging &&
741 twl4030_bci_state_to_status(state) !=
742 POWER_SUPPLY_STATUS_NOT_CHARGING;
751 static enum power_supply_property twl4030_charger_props[] = {
752 POWER_SUPPLY_PROP_STATUS,
753 POWER_SUPPLY_PROP_ONLINE,
754 POWER_SUPPLY_PROP_VOLTAGE_NOW,
755 POWER_SUPPLY_PROP_CURRENT_NOW,
758 static int __init twl4030_bci_probe(struct platform_device *pdev)
760 const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
761 struct twl4030_bci *bci;
766 dev_err(&pdev->dev, "No platform data\n");
770 bci = kzalloc(sizeof(*bci), GFP_KERNEL);
774 bci->dev = &pdev->dev;
775 bci->irq_chg = platform_get_irq(pdev, 0);
776 bci->irq_bci = platform_get_irq(pdev, 1);
777 bci->ac_current = 860; /* ~1.2A */
778 bci->usb_current = 330; /* ~560mA */
779 bci->irq_had_charger = -1;
780 bci->irq_check_count_time = jiffies;
782 platform_set_drvdata(pdev, bci);
784 ratelimit_state_init(&bci->ratelimit, HZ, 2);
786 led_trigger_register_simple("twl4030_bci-charging",
787 &bci->charging_any_trig);
789 bci->ac.name = "twl4030_ac";
790 bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
791 bci->ac.properties = twl4030_charger_props;
792 bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
793 bci->ac.get_property = twl4030_bci_get_property;
794 bci->ac.supplied_to = pdata->supplied_to;
795 bci->ac.num_supplicants = pdata->num_supplicants;
797 ret = power_supply_register(&pdev->dev, &bci->ac);
799 dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
800 goto fail_register_ac;
803 bci->usb.name = "twl4030_usb";
804 bci->usb.type = POWER_SUPPLY_TYPE_USB;
805 bci->usb.properties = twl4030_charger_props;
806 bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
807 bci->usb.get_property = twl4030_bci_get_property;
808 bci->usb.supplied_to = pdata->supplied_to;
809 bci->usb.num_supplicants = pdata->num_supplicants;
811 bci->usb_reg = regulator_get(bci->dev, "bci3v1");
812 if (IS_ERR(bci->usb_reg)) {
813 dev_warn(&pdev->dev, "regulator get bci3v1 failed\n");
817 ret = power_supply_register(&pdev->dev, &bci->usb);
819 dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
820 goto fail_register_usb;
823 ret = request_threaded_irq(bci->irq_chg, NULL,
824 twl4030_charger_interrupt, 0, pdev->name, bci);
826 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
831 ret = request_threaded_irq(bci->irq_bci, NULL,
832 twl4030_bci_interrupt, 0, pdev->name, bci);
834 dev_err(&pdev->dev, "could not request irq %d, status %d\n",
839 INIT_WORK(&bci->work, twl4030_bci_usb_work);
841 bci->transceiver = otg_get_transceiver();
842 if (bci->transceiver != NULL) {
843 bci->otg_nb.notifier_call = twl4030_bci_usb_ncb;
844 otg_register_notifier(bci->transceiver, &bci->otg_nb);
847 ret = sysfs_create_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
849 dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
853 ret = sysfs_create_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
855 dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
859 /* Enable interrupts now. */
860 reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
861 TWL4030_TBATOR1 | TWL4030_BATSTS);
862 ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
863 TWL4030_INTERRUPTS_BCIIMR1A);
865 dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
866 goto fail_unmask_interrupts;
869 reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
870 ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
871 TWL4030_INTERRUPTS_BCIIMR2A);
873 dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
875 bci->ac_charge_enable = true;
876 bci->usb_charge_enable = true;
877 twl4030_charger_enable_ac(true);
878 twl4030_charger_enable_usb(bci, true);
882 fail_unmask_interrupts:
883 sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
885 sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
887 if (bci->transceiver != NULL) {
888 otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
889 otg_put_transceiver(bci->transceiver);
891 free_irq(bci->irq_bci, bci);
893 free_irq(bci->irq_chg, bci);
895 power_supply_unregister(&bci->usb);
897 power_supply_unregister(&bci->ac);
900 if (bci->usb_enabled)
901 regulator_disable(bci->usb_reg);
902 regulator_put(bci->usb_reg);
906 led_trigger_unregister_simple(bci->charging_any_trig);
907 platform_set_drvdata(pdev, NULL);
913 static int __exit twl4030_bci_remove(struct platform_device *pdev)
915 struct twl4030_bci *bci = platform_get_drvdata(pdev);
917 sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
918 sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
920 twl4030_charger_enable_ac(false);
921 twl4030_charger_enable_usb(bci, false);
923 /* mask interrupts */
924 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
925 TWL4030_INTERRUPTS_BCIIMR1A);
926 twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
927 TWL4030_INTERRUPTS_BCIIMR2A);
929 if (bci->transceiver != NULL) {
930 otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
931 otg_put_transceiver(bci->transceiver);
933 free_irq(bci->irq_bci, bci);
934 free_irq(bci->irq_chg, bci);
935 power_supply_unregister(&bci->usb);
936 power_supply_unregister(&bci->ac);
939 if (bci->usb_enabled)
940 regulator_disable(bci->usb_reg);
941 regulator_put(bci->usb_reg);
944 led_trigger_unregister_simple(bci->charging_any_trig);
945 platform_set_drvdata(pdev, NULL);
951 static struct platform_driver twl4030_bci_driver = {
953 .name = "twl4030_bci",
954 .owner = THIS_MODULE,
956 .remove = __exit_p(twl4030_bci_remove),
959 static int __init twl4030_bci_init(void)
961 return platform_driver_probe(&twl4030_bci_driver, twl4030_bci_probe);
963 module_init(twl4030_bci_init);
965 static void __exit twl4030_bci_exit(void)
967 platform_driver_unregister(&twl4030_bci_driver);
969 module_exit(twl4030_bci_exit);
971 MODULE_AUTHOR("Gražvydas Ignotas");
972 MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
973 MODULE_LICENSE("GPL");
974 MODULE_ALIAS("platform:twl4030_bci");