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