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/of.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/power_supply.h>
  18 #include <linux/notifier.h>
  19 #include <linux/usb/phy.h>
  20 #include <linux/iio/consumer.h>
  21 #include <linux/mfd/da9150/core.h>
  22 #include <linux/mfd/da9150/registers.h>
  23
  24 /* Private data */
  25 struct da9150_charger {
  26         struct da9150 *da9150;
  27         struct device *dev;
  28
  29         struct power_supply *usb;
  30         struct power_supply *battery;
  31         struct power_supply *supply_online;
  32
  33         struct usb_phy *usb_phy;
  34         struct notifier_block otg_nb;
  35         struct work_struct otg_work;
  36         unsigned long usb_event;
  37
  38         struct iio_channel *ibus_chan;
  39         struct iio_channel *vbus_chan;
  40         struct iio_channel *tjunc_chan;
  41         struct iio_channel *vbat_chan;
  42 };
  43
  44 static inline int da9150_charger_supply_online(struct da9150_charger *charger,
  45                                                struct power_supply *psy,
  46                                                union power_supply_propval *val)
  47 {
  48         val->intval = (psy == charger->supply_online) ? 1 : 0;
  49
  50         return 0;
  51 }
  52
  53 /* Charger Properties */
  54 static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
  55                                            union power_supply_propval *val)
  56 {
  57         int v_val, ret;
  58
  59         /* Read processed value - mV units */
  60         ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
  61         if (ret < 0)
  62                 return ret;
  63
  64         /* Convert voltage to expected uV units */
  65         val->intval = v_val * 1000;
  66
  67         return 0;
  68 }
  69
  70 static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
  71                                            union power_supply_propval *val)
  72 {
  73         int i_val, ret;
  74
  75         /* Read processed value - mA units */
  76         ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
  77         if (ret < 0)
  78                 return ret;
  79
  80         /* Convert current to expected uA units */
  81         val->intval = i_val * 1000;
  82
  83         return 0;
  84 }
  85
  86 static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
  87                                      union power_supply_propval *val)
  88 {
  89         int t_val, ret;
  90
  91         /* Read processed value - 0.001 degrees C units */
  92         ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
  93         if (ret < 0)
  94                 return ret;
  95
  96         /* Convert temp to expect 0.1 degrees C units */
  97         val->intval = t_val / 100;
  98
  99         return 0;
 100 }
 101
 102 static enum power_supply_property da9150_charger_props[] = {
 103         POWER_SUPPLY_PROP_ONLINE,
 104         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 105         POWER_SUPPLY_PROP_CURRENT_AVG,
 106         POWER_SUPPLY_PROP_TEMP,
 107 };
 108
 109 static int da9150_charger_get_prop(struct power_supply *psy,
 110                                    enum power_supply_property psp,
 111                                    union power_supply_propval *val)
 112 {
 113         struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
 114         int ret;
 115
 116         switch (psp) {
 117         case POWER_SUPPLY_PROP_ONLINE:
 118                 ret = da9150_charger_supply_online(charger, psy, val);
 119                 break;
 120         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 121                 ret = da9150_charger_vbus_voltage_now(charger, val);
 122                 break;
 123         case POWER_SUPPLY_PROP_CURRENT_AVG:
 124                 ret = da9150_charger_ibus_current_avg(charger, val);
 125                 break;
 126         case POWER_SUPPLY_PROP_TEMP:
 127                 ret = da9150_charger_tjunc_temp(charger, val);
 128                 break;
 129         default:
 130                 ret = -EINVAL;
 131                 break;
 132         }
 133
 134         return ret;
 135 }
 136
 137 /* Battery Properties */
 138 static int da9150_charger_battery_status(struct da9150_charger *charger,
 139                                          union power_supply_propval *val)
 140 {
 141         u8 reg;
 142
 143         /* Check to see if battery is discharging */
 144         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
 145
 146         if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
 147             ((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
 148                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 149
 150                 return 0;
 151         }
 152
 153         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 154
 155         /* Now check for other states */
 156         switch (reg & DA9150_CHG_STAT_MASK) {
 157         case DA9150_CHG_STAT_ACT:
 158         case DA9150_CHG_STAT_PRE:
 159         case DA9150_CHG_STAT_CC:
 160         case DA9150_CHG_STAT_CV:
 161                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 162                 break;
 163         case DA9150_CHG_STAT_OFF:
 164         case DA9150_CHG_STAT_SUSP:
 165         case DA9150_CHG_STAT_TEMP:
 166         case DA9150_CHG_STAT_TIME:
 167         case DA9150_CHG_STAT_BAT:
 168                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 169                 break;
 170         case DA9150_CHG_STAT_FULL:
 171                 val->intval = POWER_SUPPLY_STATUS_FULL;
 172                 break;
 173         default:
 174                 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 175                 break;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int da9150_charger_battery_health(struct da9150_charger *charger,
 182                                          union power_supply_propval *val)
 183 {
 184         u8 reg;
 185
 186         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 187
 188         /* Check if temperature limit reached */
 189         switch (reg & DA9150_CHG_TEMP_MASK) {
 190         case DA9150_CHG_TEMP_UNDER:
 191                 val->intval = POWER_SUPPLY_HEALTH_COLD;
 192                 return 0;
 193         case DA9150_CHG_TEMP_OVER:
 194                 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 195                 return 0;
 196         default:
 197                 break;
 198         }
 199
 200         /* Check for other health states */
 201         switch (reg & DA9150_CHG_STAT_MASK) {
 202         case DA9150_CHG_STAT_ACT:
 203         case DA9150_CHG_STAT_PRE:
 204                 val->intval = POWER_SUPPLY_HEALTH_DEAD;
 205                 break;
 206         case DA9150_CHG_STAT_TIME:
 207                 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 208                 break;
 209         default:
 210                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 211                 break;
 212         }
 213
 214         return 0;
 215 }
 216
 217 static int da9150_charger_battery_present(struct da9150_charger *charger,
 218                                           union power_supply_propval *val)
 219 {
 220         u8 reg;
 221
 222         /* Check if battery present or removed */
 223         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 224         if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
 225                 val->intval = 0;
 226         else
 227                 val->intval = 1;
 228
 229         return 0;
 230 }
 231
 232 static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
 233                                               union power_supply_propval *val)
 234 {
 235         u8 reg;
 236
 237         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 238
 239         switch (reg & DA9150_CHG_STAT_MASK) {
 240         case DA9150_CHG_STAT_CC:
 241                 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
 242                 break;
 243         case DA9150_CHG_STAT_ACT:
 244         case DA9150_CHG_STAT_PRE:
 245         case DA9150_CHG_STAT_CV:
 246                 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
 247                 break;
 248         default:
 249                 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 250                 break;
 251         }
 252
 253         return 0;
 254 }
 255
 256 static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
 257                                               union power_supply_propval *val)
 258 {
 259         u8 reg;
 260
 261         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
 262
 263         /* Value starts at 2500 mV, 50 mV increments, presented in uV */
 264         val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
 265
 266         return 0;
 267 }
 268
 269 static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
 270                                               union power_supply_propval *val)
 271 {
 272         int v_val, ret;
 273
 274         /* Read processed value - mV units */
 275         ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
 276         if (ret < 0)
 277                 return ret;
 278
 279         val->intval = v_val * 1000;
 280
 281         return 0;
 282 }
 283
 284 static int da9150_charger_battery_current_max(struct da9150_charger *charger,
 285                                               union power_supply_propval *val)
 286 {
 287         int reg;
 288
 289         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
 290
 291         /* 25mA increments */
 292         val->intval = reg * 25000;
 293
 294         return 0;
 295 }
 296
 297 static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
 298                                               union power_supply_propval *val)
 299 {
 300         u8 reg;
 301
 302         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
 303
 304         /* Value starts at 3650 mV, 25 mV increments, presented in uV */
 305         val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
 306         return 0;
 307 }
 308
 309 static enum power_supply_property da9150_charger_bat_props[] = {
 310         POWER_SUPPLY_PROP_STATUS,
 311         POWER_SUPPLY_PROP_ONLINE,
 312         POWER_SUPPLY_PROP_HEALTH,
 313         POWER_SUPPLY_PROP_PRESENT,
 314         POWER_SUPPLY_PROP_CHARGE_TYPE,
 315         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 316         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 317         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 318         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 319 };
 320
 321 static int da9150_charger_battery_get_prop(struct power_supply *psy,
 322                                            enum power_supply_property psp,
 323                                            union power_supply_propval *val)
 324 {
 325         struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
 326         int ret;
 327
 328         switch (psp) {
 329         case POWER_SUPPLY_PROP_STATUS:
 330                 ret = da9150_charger_battery_status(charger, val);
 331                 break;
 332         case POWER_SUPPLY_PROP_ONLINE:
 333                 ret = da9150_charger_supply_online(charger, psy, val);
 334                 break;
 335         case POWER_SUPPLY_PROP_HEALTH:
 336                 ret = da9150_charger_battery_health(charger, val);
 337                 break;
 338         case POWER_SUPPLY_PROP_PRESENT:
 339                 ret = da9150_charger_battery_present(charger, val);
 340                 break;
 341         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 342                 ret = da9150_charger_battery_charge_type(charger, val);
 343                 break;
 344         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 345                 ret = da9150_charger_battery_voltage_min(charger, val);
 346                 break;
 347         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 348                 ret = da9150_charger_battery_voltage_now(charger, val);
 349                 break;
 350         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 351                 ret = da9150_charger_battery_current_max(charger, val);
 352                 break;
 353         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 354                 ret = da9150_charger_battery_voltage_max(charger, val);
 355                 break;
 356         default:
 357                 ret = -EINVAL;
 358                 break;
 359         }
 360
 361         return ret;
 362 }
 363
 364 static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
 365 {
 366         struct da9150_charger *charger = data;
 367
 368         power_supply_changed(charger->battery);
 369
 370         return IRQ_HANDLED;
 371 }
 372
 373 static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
 374 {
 375         struct da9150_charger *charger = data;
 376
 377         /* Nothing we can really do except report this. */
 378         dev_crit(charger->dev, "TJunc over temperature!!!\n");
 379         power_supply_changed(charger->usb);
 380
 381         return IRQ_HANDLED;
 382 }
 383
 384 static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
 385 {
 386         struct da9150_charger *charger = data;
 387
 388         /* Nothing we can really do except report this. */
 389         dev_crit(charger->dev, "VSYS under voltage!!!\n");
 390         power_supply_changed(charger->usb);
 391         power_supply_changed(charger->battery);
 392
 393         return IRQ_HANDLED;
 394 }
 395
 396 static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
 397 {
 398         struct da9150_charger *charger = data;
 399         u8 reg;
 400
 401         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
 402
 403         /* Charger plugged in or battery only */
 404         switch (reg & DA9150_VBUS_STAT_MASK) {
 405         case DA9150_VBUS_STAT_OFF:
 406         case DA9150_VBUS_STAT_WAIT:
 407                 charger->supply_online = charger->battery;
 408                 break;
 409         case DA9150_VBUS_STAT_CHG:
 410                 charger->supply_online = charger->usb;
 411                 break;
 412         default:
 413                 dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
 414                          reg);
 415                 charger->supply_online = NULL;
 416                 break;
 417         }
 418
 419         power_supply_changed(charger->usb);
 420         power_supply_changed(charger->battery);
 421
 422         return IRQ_HANDLED;
 423 }
 424
 425 static void da9150_charger_otg_work(struct work_struct *data)
 426 {
 427         struct da9150_charger *charger =
 428                 container_of(data, struct da9150_charger, otg_work);
 429
 430         switch (charger->usb_event) {
 431         case USB_EVENT_ID:
 432                 /* Enable OTG Boost */
 433                 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
 434                                 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
 435                 break;
 436         case USB_EVENT_NONE:
 437                 /* Revert to charge mode */
 438                 power_supply_changed(charger->usb);
 439                 power_supply_changed(charger->battery);
 440                 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
 441                                 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
 442                 break;
 443         }
 444 }
 445
 446 static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
 447                                   void *priv)
 448 {
 449         struct da9150_charger *charger =
 450                 container_of(nb, struct da9150_charger, otg_nb);
 451
 452         dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
 453
 454         charger->usb_event = val;
 455         schedule_work(&charger->otg_work);
 456
 457         return NOTIFY_OK;
 458 }
 459
 460 static int da9150_charger_register_irq(struct platform_device *pdev,
 461                                        irq_handler_t handler,
 462                                        const char *irq_name)
 463 {
 464         struct device *dev = &pdev->dev;
 465         struct da9150_charger *charger = platform_get_drvdata(pdev);
 466         int irq, ret;
 467
 468         irq = platform_get_irq_byname(pdev, irq_name);
 469         if (irq < 0) {
 470                 dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
 471                 return irq;
 472         }
 473
 474         ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
 475                                    charger);
 476         if (ret)
 477                 dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
 478
 479         return ret;
 480 }
 481
 482 static void da9150_charger_unregister_irq(struct platform_device *pdev,
 483                                           const char *irq_name)
 484 {
 485         struct device *dev = &pdev->dev;
 486         struct da9150_charger *charger = platform_get_drvdata(pdev);
 487         int irq;
 488
 489         irq = platform_get_irq_byname(pdev, irq_name);
 490         if (irq < 0) {
 491                 dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
 492                 return;
 493         }
 494
 495         free_irq(irq, charger);
 496 }
 497
 498 static const struct power_supply_desc usb_desc = {
 499         .name           = "da9150-usb",
 500         .type           = POWER_SUPPLY_TYPE_USB,
 501         .properties     = da9150_charger_props,
 502         .num_properties = ARRAY_SIZE(da9150_charger_props),
 503         .get_property   = da9150_charger_get_prop,
 504 };
 505
 506 static const struct power_supply_desc battery_desc = {
 507         .name           = "da9150-battery",
 508         .type           = POWER_SUPPLY_TYPE_BATTERY,
 509         .properties     = da9150_charger_bat_props,
 510         .num_properties = ARRAY_SIZE(da9150_charger_bat_props),
 511         .get_property   = da9150_charger_battery_get_prop,
 512 };
 513
 514 static int da9150_charger_probe(struct platform_device *pdev)
 515 {
 516         struct device *dev = &pdev->dev;
 517         struct da9150 *da9150 = dev_get_drvdata(dev->parent);
 518         struct da9150_charger *charger;
 519         u8 reg;
 520         int ret;
 521
 522         charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
 523         if (!charger)
 524                 return -ENOMEM;
 525
 526         platform_set_drvdata(pdev, charger);
 527         charger->da9150 = da9150;
 528         charger->dev = dev;
 529
 530         /* Acquire ADC channels */
 531         charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
 532         if (IS_ERR(charger->ibus_chan)) {
 533                 ret = PTR_ERR(charger->ibus_chan);
 534                 goto ibus_chan_fail;
 535         }
 536
 537         charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
 538         if (IS_ERR(charger->vbus_chan)) {
 539                 ret = PTR_ERR(charger->vbus_chan);
 540                 goto vbus_chan_fail;
 541         }
 542
 543         charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
 544         if (IS_ERR(charger->tjunc_chan)) {
 545                 ret = PTR_ERR(charger->tjunc_chan);
 546                 goto tjunc_chan_fail;
 547         }
 548
 549         charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
 550         if (IS_ERR(charger->vbat_chan)) {
 551                 ret = PTR_ERR(charger->vbat_chan);
 552                 goto vbat_chan_fail;
 553         }
 554
 555         /* Register power supplies */
 556         charger->usb = power_supply_register(dev, &usb_desc, NULL);
 557         if (IS_ERR(charger->usb)) {
 558                 ret = PTR_ERR(charger->usb);
 559                 goto usb_fail;
 560         }
 561
 562         charger->battery = power_supply_register(dev, &battery_desc, NULL);
 563         if (IS_ERR(charger->battery)) {
 564                 ret = PTR_ERR(charger->battery);
 565                 goto battery_fail;
 566         }
 567
 568         /* Get initial online supply */
 569         reg = da9150_reg_read(da9150, DA9150_STATUS_H);
 570
 571         switch (reg & DA9150_VBUS_STAT_MASK) {
 572         case DA9150_VBUS_STAT_OFF:
 573         case DA9150_VBUS_STAT_WAIT:
 574                 charger->supply_online = charger->battery;
 575                 break;
 576         case DA9150_VBUS_STAT_CHG:
 577                 charger->supply_online = charger->usb;
 578                 break;
 579         default:
 580                 dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
 581                 charger->supply_online = NULL;
 582                 break;
 583         }
 584
 585         /* Setup OTG reporting & configuration */
 586         charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 587         if (!IS_ERR_OR_NULL(charger->usb_phy)) {
 588                 INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
 589                 charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
 590                 usb_register_notifier(charger->usb_phy, &charger->otg_nb);
 591         }
 592
 593         /* Register IRQs */
 594         ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
 595                                           "CHG_STATUS");
 596         if (ret < 0)
 597                 goto chg_irq_fail;
 598
 599         ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
 600                                           "CHG_TJUNC");
 601         if (ret < 0)
 602                 goto tjunc_irq_fail;
 603
 604         ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
 605                                           "CHG_VFAULT");
 606         if (ret < 0)
 607                 goto vfault_irq_fail;
 608
 609         ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
 610                                           "CHG_VBUS");
 611         if (ret < 0)
 612                 goto vbus_irq_fail;
 613
 614         return 0;
 615
 616
 617 vbus_irq_fail:
 618         da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
 619 vfault_irq_fail:
 620         da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
 621 tjunc_irq_fail:
 622         da9150_charger_unregister_irq(pdev, "CHG_STATUS");
 623 chg_irq_fail:
 624         if (!IS_ERR_OR_NULL(charger->usb_phy))
 625                 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
 626 battery_fail:
 627         power_supply_unregister(charger->usb);
 628
 629 usb_fail:
 630         iio_channel_release(charger->vbat_chan);
 631
 632 vbat_chan_fail:
 633         iio_channel_release(charger->tjunc_chan);
 634
 635 tjunc_chan_fail:
 636         iio_channel_release(charger->vbus_chan);
 637
 638 vbus_chan_fail:
 639         iio_channel_release(charger->ibus_chan);
 640
 641 ibus_chan_fail:
 642         return ret;
 643 }
 644
 645 static int da9150_charger_remove(struct platform_device *pdev)
 646 {
 647         struct da9150_charger *charger = platform_get_drvdata(pdev);
 648         int irq;
 649
 650         /* Make sure IRQs are released before unregistering power supplies */
 651         irq = platform_get_irq_byname(pdev, "CHG_VBUS");
 652         free_irq(irq, charger);
 653
 654         irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
 655         free_irq(irq, charger);
 656
 657         irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
 658         free_irq(irq, charger);
 659
 660         irq = platform_get_irq_byname(pdev, "CHG_STATUS");
 661         free_irq(irq, charger);
 662
 663         if (!IS_ERR_OR_NULL(charger->usb_phy))
 664                 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
 665
 666         power_supply_unregister(charger->battery);
 667         power_supply_unregister(charger->usb);
 668
 669         /* Release ADC channels */
 670         iio_channel_release(charger->ibus_chan);
 671         iio_channel_release(charger->vbus_chan);
 672         iio_channel_release(charger->tjunc_chan);
 673         iio_channel_release(charger->vbat_chan);
 674
 675         return 0;
 676 }
 677
 678 static struct platform_driver da9150_charger_driver = {
 679         .driver = {
 680                 .name = "da9150-charger",
 681         },
 682         .probe = da9150_charger_probe,
 683         .remove = da9150_charger_remove,
 684 };
 685
 686 module_platform_driver(da9150_charger_driver);
 687
 688 MODULE_DESCRIPTION("Charger Driver for DA9150");
 689 MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
 690 MODULE_LICENSE("GPL");