linux/drivers/power/twl4030_charger.c
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   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
  78static bool allow_usb;
  79module_param(allow_usb, bool, 0644);
  80MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
  81
  82struct 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 */
 100static 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
 115static int twl4030_bci_read(u8 reg, u8 *val)
 116{
 117        return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg);
 118}
 119
 120static 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
 127static 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 */
 150static 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 */
 172static 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 */
 223static 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 */
 238static 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 */
 281static 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 */
 295static 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
 338static 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
 353static 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 */
 374static 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 */
 399static 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
 415static 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
 427static 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
 491static 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
 498static int __init twl4030_bci_probe(struct platform_device *pdev)
 499{
 500        struct twl4030_bci *bci;
 501        struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
 502        int ret;
 503        u32 reg;
 504
 505        bci = kzalloc(sizeof(*bci), GFP_KERNEL);
 506        if (bci == NULL)
 507                return -ENOMEM;
 508
 509        bci->dev = &pdev->dev;
 510        bci->irq_chg = platform_get_irq(pdev, 0);
 511        bci->irq_bci = platform_get_irq(pdev, 1);
 512
 513        platform_set_drvdata(pdev, bci);
 514
 515        bci->ac.name = "twl4030_ac";
 516        bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
 517        bci->ac.properties = twl4030_charger_props;
 518        bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
 519        bci->ac.get_property = twl4030_bci_get_property;
 520
 521        ret = power_supply_register(&pdev->dev, &bci->ac);
 522        if (ret) {
 523                dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
 524                goto fail_register_ac;
 525        }
 526
 527        bci->usb.name = "twl4030_usb";
 528        bci->usb.type = POWER_SUPPLY_TYPE_USB;
 529        bci->usb.properties = twl4030_charger_props;
 530        bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
 531        bci->usb.get_property = twl4030_bci_get_property;
 532
 533        bci->usb_reg = regulator_get(bci->dev, "bci3v1");
 534
 535        ret = power_supply_register(&pdev->dev, &bci->usb);
 536        if (ret) {
 537                dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
 538                goto fail_register_usb;
 539        }
 540
 541        ret = request_threaded_irq(bci->irq_chg, NULL,
 542                        twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name,
 543                        bci);
 544        if (ret < 0) {
 545                dev_err(&pdev->dev, "could not request irq %d, status %d\n",
 546                        bci->irq_chg, ret);
 547                goto fail_chg_irq;
 548        }
 549
 550        ret = request_threaded_irq(bci->irq_bci, NULL,
 551                        twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci);
 552        if (ret < 0) {
 553                dev_err(&pdev->dev, "could not request irq %d, status %d\n",
 554                        bci->irq_bci, ret);
 555                goto fail_bci_irq;
 556        }
 557
 558        INIT_WORK(&bci->work, twl4030_bci_usb_work);
 559
 560        bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
 561        if (!IS_ERR_OR_NULL(bci->transceiver)) {
 562                bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
 563                usb_register_notifier(bci->transceiver, &bci->usb_nb);
 564        }
 565
 566        /* Enable interrupts now. */
 567        reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
 568                TWL4030_TBATOR1 | TWL4030_BATSTS);
 569        ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
 570                               TWL4030_INTERRUPTS_BCIIMR1A);
 571        if (ret < 0) {
 572                dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
 573                goto fail_unmask_interrupts;
 574        }
 575
 576        reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
 577        ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
 578                               TWL4030_INTERRUPTS_BCIIMR2A);
 579        if (ret < 0)
 580                dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
 581
 582        twl4030_charger_enable_ac(true);
 583        twl4030_charger_enable_usb(bci, true);
 584        twl4030_charger_enable_backup(pdata->bb_uvolt,
 585                                      pdata->bb_uamp);
 586
 587        return 0;
 588
 589fail_unmask_interrupts:
 590        if (!IS_ERR_OR_NULL(bci->transceiver)) {
 591                usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
 592                usb_put_phy(bci->transceiver);
 593        }
 594        free_irq(bci->irq_bci, bci);
 595fail_bci_irq:
 596        free_irq(bci->irq_chg, bci);
 597fail_chg_irq:
 598        power_supply_unregister(&bci->usb);
 599fail_register_usb:
 600        power_supply_unregister(&bci->ac);
 601fail_register_ac:
 602        kfree(bci);
 603
 604        return ret;
 605}
 606
 607static int __exit twl4030_bci_remove(struct platform_device *pdev)
 608{
 609        struct twl4030_bci *bci = platform_get_drvdata(pdev);
 610
 611        twl4030_charger_enable_ac(false);
 612        twl4030_charger_enable_usb(bci, false);
 613        twl4030_charger_enable_backup(0, 0);
 614
 615        /* mask interrupts */
 616        twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
 617                         TWL4030_INTERRUPTS_BCIIMR1A);
 618        twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
 619                         TWL4030_INTERRUPTS_BCIIMR2A);
 620
 621        if (!IS_ERR_OR_NULL(bci->transceiver)) {
 622                usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
 623                usb_put_phy(bci->transceiver);
 624        }
 625        free_irq(bci->irq_bci, bci);
 626        free_irq(bci->irq_chg, bci);
 627        power_supply_unregister(&bci->usb);
 628        power_supply_unregister(&bci->ac);
 629        kfree(bci);
 630
 631        return 0;
 632}
 633
 634static struct platform_driver twl4030_bci_driver = {
 635        .driver = {
 636                .name   = "twl4030_bci",
 637                .owner  = THIS_MODULE,
 638        },
 639        .remove = __exit_p(twl4030_bci_remove),
 640};
 641
 642module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe);
 643
 644MODULE_AUTHOR("Gražvydas Ignotas");
 645MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
 646MODULE_LICENSE("GPL");
 647MODULE_ALIAS("platform:twl4030_bci");
 648
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