drivers/power/supply/da9150-charger.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * DA9150 Charger Driver
   4  *
   5  * Copyright (c) 2014 Dialog Semiconductor
   6  *
   7  * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/power_supply.h>
  16 #include <linux/notifier.h>
  17 #include <linux/usb/phy.h>
  18 #include <linux/iio/consumer.h>
  19 #include <linux/mfd/da9150/core.h>
  20 #include <linux/mfd/da9150/registers.h>
  21
  22 /* Private data */
  23 struct da9150_charger {
  24         struct da9150 *da9150;
  25         struct device *dev;
  26
  27         struct power_supply *usb;
  28         struct power_supply *battery;
  29         struct power_supply *supply_online;
  30
  31         struct usb_phy *usb_phy;
  32         struct notifier_block otg_nb;
  33         struct work_struct otg_work;
  34         unsigned long usb_event;
  35
  36         struct iio_channel *ibus_chan;
  37         struct iio_channel *vbus_chan;
  38         struct iio_channel *tjunc_chan;
  39         struct iio_channel *vbat_chan;
  40 };
  41
  42 static inline int da9150_charger_supply_online(struct da9150_charger *charger,
  43                                                struct power_supply *psy,
  44                                                union power_supply_propval *val)
  45 {
  46         val->intval = (psy == charger->supply_online) ? 1 : 0;
  47
  48         return 0;
  49 }
  50
  51 /* Charger Properties */
  52 static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
  53                                            union power_supply_propval *val)
  54 {
  55         int v_val, ret;
  56
  57         /* Read processed value - mV units */
  58         ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
  59         if (ret < 0)
  60                 return ret;
  61
  62         /* Convert voltage to expected uV units */
  63         val->intval = v_val * 1000;
  64
  65         return 0;
  66 }
  67
  68 static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
  69                                            union power_supply_propval *val)
  70 {
  71         int i_val, ret;
  72
  73         /* Read processed value - mA units */
  74         ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
  75         if (ret < 0)
  76                 return ret;
  77
  78         /* Convert current to expected uA units */
  79         val->intval = i_val * 1000;
  80
  81         return 0;
  82 }
  83
  84 static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
  85                                      union power_supply_propval *val)
  86 {
  87         int t_val, ret;
  88
  89         /* Read processed value - 0.001 degrees C units */
  90         ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
  91         if (ret < 0)
  92                 return ret;
  93
  94         /* Convert temp to expect 0.1 degrees C units */
  95         val->intval = t_val / 100;
  96
  97         return 0;
  98 }
  99
 100 static enum power_supply_property da9150_charger_props[] = {
 101         POWER_SUPPLY_PROP_ONLINE,
 102         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 103         POWER_SUPPLY_PROP_CURRENT_AVG,
 104         POWER_SUPPLY_PROP_TEMP,
 105 };
 106
 107 static int da9150_charger_get_prop(struct power_supply *psy,
 108                                    enum power_supply_property psp,
 109                                    union power_supply_propval *val)
 110 {
 111         struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
 112         int ret;
 113
 114         switch (psp) {
 115         case POWER_SUPPLY_PROP_ONLINE:
 116                 ret = da9150_charger_supply_online(charger, psy, val);
 117                 break;
 118         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 119                 ret = da9150_charger_vbus_voltage_now(charger, val);
 120                 break;
 121         case POWER_SUPPLY_PROP_CURRENT_AVG:
 122                 ret = da9150_charger_ibus_current_avg(charger, val);
 123                 break;
 124         case POWER_SUPPLY_PROP_TEMP:
 125                 ret = da9150_charger_tjunc_temp(charger, val);
 126                 break;
 127         default:
 128                 ret = -EINVAL;
 129                 break;
 130         }
 131
 132         return ret;
 133 }
 134
 135 /* Battery Properties */
 136 static int da9150_charger_battery_status(struct da9150_charger *charger,
 137                                          union power_supply_propval *val)
 138 {
 139         u8 reg;
 140
 141         /* Check to see if battery is discharging */
 142         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
 143
 144         if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
 145             ((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
 146                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 147
 148                 return 0;
 149         }
 150
 151         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 152
 153         /* Now check for other states */
 154         switch (reg & DA9150_CHG_STAT_MASK) {
 155         case DA9150_CHG_STAT_ACT:
 156         case DA9150_CHG_STAT_PRE:
 157         case DA9150_CHG_STAT_CC:
 158         case DA9150_CHG_STAT_CV:
 159                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 160                 break;
 161         case DA9150_CHG_STAT_OFF:
 162         case DA9150_CHG_STAT_SUSP:
 163         case DA9150_CHG_STAT_TEMP:
 164         case DA9150_CHG_STAT_TIME:
 165         case DA9150_CHG_STAT_BAT:
 166                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 167                 break;
 168         case DA9150_CHG_STAT_FULL:
 169                 val->intval = POWER_SUPPLY_STATUS_FULL;
 170                 break;
 171         default:
 172                 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 173                 break;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static int da9150_charger_battery_health(struct da9150_charger *charger,
 180                                          union power_supply_propval *val)
 181 {
 182         u8 reg;
 183
 184         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 185
 186         /* Check if temperature limit reached */
 187         switch (reg & DA9150_CHG_TEMP_MASK) {
 188         case DA9150_CHG_TEMP_UNDER:
 189                 val->intval = POWER_SUPPLY_HEALTH_COLD;
 190                 return 0;
 191         case DA9150_CHG_TEMP_OVER:
 192                 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 193                 return 0;
 194         default:
 195                 break;
 196         }
 197
 198         /* Check for other health states */
 199         switch (reg & DA9150_CHG_STAT_MASK) {
 200         case DA9150_CHG_STAT_ACT:
 201         case DA9150_CHG_STAT_PRE:
 202                 val->intval = POWER_SUPPLY_HEALTH_DEAD;
 203                 break;
 204         case DA9150_CHG_STAT_TIME:
 205                 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 206                 break;
 207         default:
 208                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 209                 break;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static int da9150_charger_battery_present(struct da9150_charger *charger,
 216                                           union power_supply_propval *val)
 217 {
 218         u8 reg;
 219
 220         /* Check if battery present or removed */
 221         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 222         if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
 223                 val->intval = 0;
 224         else
 225                 val->intval = 1;
 226
 227         return 0;
 228 }
 229
 230 static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
 231                                               union power_supply_propval *val)
 232 {
 233         u8 reg;
 234
 235         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 236
 237         switch (reg & DA9150_CHG_STAT_MASK) {
 238         case DA9150_CHG_STAT_CC:
 239                 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
 240                 break;
 241         case DA9150_CHG_STAT_ACT:
 242         case DA9150_CHG_STAT_PRE:
 243         case DA9150_CHG_STAT_CV:
 244                 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
 245                 break;
 246         default:
 247                 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 248                 break;
 249         }
 250
 251         return 0;
 252 }
 253
 254 static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
 255                                               union power_supply_propval *val)
 256 {
 257         u8 reg;
 258
 259         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
 260
 261         /* Value starts at 2500 mV, 50 mV increments, presented in uV */
 262         val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
 263
 264         return 0;
 265 }
 266
 267 static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
 268                                               union power_supply_propval *val)
 269 {
 270         int v_val, ret;
 271
 272         /* Read processed value - mV units */
 273         ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
 274         if (ret < 0)
 275                 return ret;
 276
 277         val->intval = v_val * 1000;
 278
 279         return 0;
 280 }
 281
 282 static int da9150_charger_battery_current_max(struct da9150_charger *charger,
 283                                               union power_supply_propval *val)
 284 {
 285         int reg;
 286
 287         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
 288
 289         /* 25mA increments */
 290         val->intval = reg * 25000;
 291
 292         return 0;
 293 }
 294
 295 static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
 296                                               union power_supply_propval *val)
 297 {
 298         u8 reg;
 299
 300         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
 301
 302         /* Value starts at 3650 mV, 25 mV increments, presented in uV */
 303         val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
 304         return 0;
 305 }
 306
 307 static enum power_supply_property da9150_charger_bat_props[] = {
 308         POWER_SUPPLY_PROP_STATUS,
 309         POWER_SUPPLY_PROP_ONLINE,
 310         POWER_SUPPLY_PROP_HEALTH,
 311         POWER_SUPPLY_PROP_PRESENT,
 312         POWER_SUPPLY_PROP_CHARGE_TYPE,
 313         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 314         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 315         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 316         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 317 };
 318
 319 static int da9150_charger_battery_get_prop(struct power_supply *psy,
 320                                            enum power_supply_property psp,
 321                                            union power_supply_propval *val)
 322 {
 323         struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
 324         int ret;
 325
 326         switch (psp) {
 327         case POWER_SUPPLY_PROP_STATUS:
 328                 ret = da9150_charger_battery_status(charger, val);
 329                 break;
 330         case POWER_SUPPLY_PROP_ONLINE:
 331                 ret = da9150_charger_supply_online(charger, psy, val);
 332                 break;
 333         case POWER_SUPPLY_PROP_HEALTH:
 334                 ret = da9150_charger_battery_health(charger, val);
 335                 break;
 336         case POWER_SUPPLY_PROP_PRESENT:
 337                 ret = da9150_charger_battery_present(charger, val);
 338                 break;
 339         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 340                 ret = da9150_charger_battery_charge_type(charger, val);
 341                 break;
 342         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 343                 ret = da9150_charger_battery_voltage_min(charger, val);
 344                 break;
 345         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 346                 ret = da9150_charger_battery_voltage_now(charger, val);
 347                 break;
 348         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 349                 ret = da9150_charger_battery_current_max(charger, val);
 350                 break;
 351         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 352                 ret = da9150_charger_battery_voltage_max(charger, val);
 353                 break;
 354         default:
 355                 ret = -EINVAL;
 356                 break;
 357         }
 358
 359         return ret;
 360 }
 361
 362 static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
 363 {
 364         struct da9150_charger *charger = data;
 365
 366         power_supply_changed(charger->battery);
 367
 368         return IRQ_HANDLED;
 369 }
 370
 371 static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
 372 {
 373         struct da9150_charger *charger = data;
 374
 375         /* Nothing we can really do except report this. */
 376         dev_crit(charger->dev, "TJunc over temperature!!!\n");
 377         power_supply_changed(charger->usb);
 378
 379         return IRQ_HANDLED;
 380 }
 381
 382 static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
 383 {
 384         struct da9150_charger *charger = data;
 385
 386         /* Nothing we can really do except report this. */
 387         dev_crit(charger->dev, "VSYS under voltage!!!\n");
 388         power_supply_changed(charger->usb);
 389         power_supply_changed(charger->battery);
 390
 391         return IRQ_HANDLED;
 392 }
 393
 394 static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
 395 {
 396         struct da9150_charger *charger = data;
 397         u8 reg;
 398
 399         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
 400
 401         /* Charger plugged in or battery only */
 402         switch (reg & DA9150_VBUS_STAT_MASK) {
 403         case DA9150_VBUS_STAT_OFF:
 404         case DA9150_VBUS_STAT_WAIT:
 405                 charger->supply_online = charger->battery;
 406                 break;
 407         case DA9150_VBUS_STAT_CHG:
 408                 charger->supply_online = charger->usb;
 409                 break;
 410         default:
 411                 dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
 412                          reg);
 413                 charger->supply_online = NULL;
 414                 break;
 415         }
 416
 417         power_supply_changed(charger->usb);
 418         power_supply_changed(charger->battery);
 419
 420         return IRQ_HANDLED;
 421 }
 422
 423 static void da9150_charger_otg_work(struct work_struct *data)
 424 {
 425         struct da9150_charger *charger =
 426                 container_of(data, struct da9150_charger, otg_work);
 427
 428         switch (charger->usb_event) {
 429         case USB_EVENT_ID:
 430                 /* Enable OTG Boost */
 431                 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
 432                                 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
 433                 break;
 434         case USB_EVENT_NONE:
 435                 /* Revert to charge mode */
 436                 power_supply_changed(charger->usb);
 437                 power_supply_changed(charger->battery);
 438                 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
 439                                 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
 440                 break;
 441         }
 442 }
 443
 444 static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
 445                                   void *priv)
 446 {
 447         struct da9150_charger *charger =
 448                 container_of(nb, struct da9150_charger, otg_nb);
 449
 450         dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
 451
 452         charger->usb_event = val;
 453         schedule_work(&charger->otg_work);
 454
 455         return NOTIFY_OK;
 456 }
 457
 458 static int da9150_charger_register_irq(struct platform_device *pdev,
 459                                        irq_handler_t handler,
 460                                        const char *irq_name)
 461 {
 462         struct device *dev = &pdev->dev;
 463         struct da9150_charger *charger = platform_get_drvdata(pdev);
 464         int irq, ret;
 465
 466         irq = platform_get_irq_byname(pdev, irq_name);
 467         if (irq < 0)
 468                 return irq;
 469
 470         ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
 471                                    charger);
 472         if (ret)
 473                 dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
 474
 475         return ret;
 476 }
 477
 478 static void da9150_charger_unregister_irq(struct platform_device *pdev,
 479                                           const char *irq_name)
 480 {
 481         struct da9150_charger *charger = platform_get_drvdata(pdev);
 482         int irq;
 483
 484         irq = platform_get_irq_byname(pdev, irq_name);
 485         if (irq < 0)
 486                 return;
 487
 488         free_irq(irq, charger);
 489 }
 490
 491 static const struct power_supply_desc usb_desc = {
 492         .name           = "da9150-usb",
 493         .type           = POWER_SUPPLY_TYPE_USB,
 494         .properties     = da9150_charger_props,
 495         .num_properties = ARRAY_SIZE(da9150_charger_props),
 496         .get_property   = da9150_charger_get_prop,
 497 };
 498
 499 static const struct power_supply_desc battery_desc = {
 500         .name           = "da9150-battery",
 501         .type           = POWER_SUPPLY_TYPE_BATTERY,
 502         .properties     = da9150_charger_bat_props,
 503         .num_properties = ARRAY_SIZE(da9150_charger_bat_props),
 504         .get_property   = da9150_charger_battery_get_prop,
 505 };
 506
 507 static int da9150_charger_probe(struct platform_device *pdev)
 508 {
 509         struct device *dev = &pdev->dev;
 510         struct da9150 *da9150 = dev_get_drvdata(dev->parent);
 511         struct da9150_charger *charger;
 512         u8 reg;
 513         int ret;
 514
 515         charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
 516         if (!charger)
 517                 return -ENOMEM;
 518
 519         platform_set_drvdata(pdev, charger);
 520         charger->da9150 = da9150;
 521         charger->dev = dev;
 522
 523         /* Acquire ADC channels */
 524         charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
 525         if (IS_ERR(charger->ibus_chan)) {
 526                 ret = PTR_ERR(charger->ibus_chan);
 527                 goto ibus_chan_fail;
 528         }
 529
 530         charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
 531         if (IS_ERR(charger->vbus_chan)) {
 532                 ret = PTR_ERR(charger->vbus_chan);
 533                 goto vbus_chan_fail;
 534         }
 535
 536         charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
 537         if (IS_ERR(charger->tjunc_chan)) {
 538                 ret = PTR_ERR(charger->tjunc_chan);
 539                 goto tjunc_chan_fail;
 540         }
 541
 542         charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
 543         if (IS_ERR(charger->vbat_chan)) {
 544                 ret = PTR_ERR(charger->vbat_chan);
 545                 goto vbat_chan_fail;
 546         }
 547
 548         /* Register power supplies */
 549         charger->usb = power_supply_register(dev, &usb_desc, NULL);
 550         if (IS_ERR(charger->usb)) {
 551                 ret = PTR_ERR(charger->usb);
 552                 goto usb_fail;
 553         }
 554
 555         charger->battery = power_supply_register(dev, &battery_desc, NULL);
 556         if (IS_ERR(charger->battery)) {
 557                 ret = PTR_ERR(charger->battery);
 558                 goto battery_fail;
 559         }
 560
 561         /* Get initial online supply */
 562         reg = da9150_reg_read(da9150, DA9150_STATUS_H);
 563
 564         switch (reg & DA9150_VBUS_STAT_MASK) {
 565         case DA9150_VBUS_STAT_OFF:
 566         case DA9150_VBUS_STAT_WAIT:
 567                 charger->supply_online = charger->battery;
 568                 break;
 569         case DA9150_VBUS_STAT_CHG:
 570                 charger->supply_online = charger->usb;
 571                 break;
 572         default:
 573                 dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
 574                 charger->supply_online = NULL;
 575                 break;
 576         }
 577
 578         /* Setup OTG reporting & configuration */
 579         charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 580         if (!IS_ERR_OR_NULL(charger->usb_phy)) {
 581                 INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
 582                 charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
 583                 usb_register_notifier(charger->usb_phy, &charger->otg_nb);
 584         }
 585
 586         /* Register IRQs */
 587         ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
 588                                           "CHG_STATUS");
 589         if (ret < 0)
 590                 goto chg_irq_fail;
 591
 592         ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
 593                                           "CHG_TJUNC");
 594         if (ret < 0)
 595                 goto tjunc_irq_fail;
 596
 597         ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
 598                                           "CHG_VFAULT");
 599         if (ret < 0)
 600                 goto vfault_irq_fail;
 601
 602         ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
 603                                           "CHG_VBUS");
 604         if (ret < 0)
 605                 goto vbus_irq_fail;
 606
 607         return 0;
 608
 609
 610 vbus_irq_fail:
 611         da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
 612 vfault_irq_fail:
 613         da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
 614 tjunc_irq_fail:
 615         da9150_charger_unregister_irq(pdev, "CHG_STATUS");
 616 chg_irq_fail:
 617         if (!IS_ERR_OR_NULL(charger->usb_phy))
 618                 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
 619 battery_fail:
 620         power_supply_unregister(charger->usb);
 621
 622 usb_fail:
 623         iio_channel_release(charger->vbat_chan);
 624
 625 vbat_chan_fail:
 626         iio_channel_release(charger->tjunc_chan);
 627
 628 tjunc_chan_fail:
 629         iio_channel_release(charger->vbus_chan);
 630
 631 vbus_chan_fail:
 632         iio_channel_release(charger->ibus_chan);
 633
 634 ibus_chan_fail:
 635         return ret;
 636 }
 637
 638 static void da9150_charger_remove(struct platform_device *pdev)
 639 {
 640         struct da9150_charger *charger = platform_get_drvdata(pdev);
 641         int irq;
 642
 643         /* Make sure IRQs are released before unregistering power supplies */
 644         irq = platform_get_irq_byname(pdev, "CHG_VBUS");
 645         free_irq(irq, charger);
 646
 647         irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
 648         free_irq(irq, charger);
 649
 650         irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
 651         free_irq(irq, charger);
 652
 653         irq = platform_get_irq_byname(pdev, "CHG_STATUS");
 654         free_irq(irq, charger);
 655
 656         if (!IS_ERR_OR_NULL(charger->usb_phy))
 657                 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
 658         cancel_work_sync(&charger->otg_work);
 659
 660         power_supply_unregister(charger->battery);
 661         power_supply_unregister(charger->usb);
 662
 663         /* Release ADC channels */
 664         iio_channel_release(charger->ibus_chan);
 665         iio_channel_release(charger->vbus_chan);
 666         iio_channel_release(charger->tjunc_chan);
 667         iio_channel_release(charger->vbat_chan);
 668 }
 669
 670 static struct platform_driver da9150_charger_driver = {
 671         .driver = {
 672                 .name = "da9150-charger",
 673         },
 674         .probe = da9150_charger_probe,
 675         .remove_new = da9150_charger_remove,
 676 };
 677
 678 module_platform_driver(da9150_charger_driver);
 679
 680 MODULE_DESCRIPTION("Charger Driver for DA9150");
 681 MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
 682 MODULE_LICENSE("GPL");