drivers/power/da9150-charger.c

   1 /*
   2  * DA9150 Charger Driver
   3  *
   4  * Copyright (c) 2014 Dialog Semiconductor
   5  *
   6  * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/slab.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/of.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/power_supply.h>
  22 #include <linux/notifier.h>
  23 #include <linux/usb/phy.h>
  24 #include <linux/iio/consumer.h>
  25 #include <linux/mfd/da9150/core.h>
  26 #include <linux/mfd/da9150/registers.h>
  27
  28 /* Private data */
  29 struct da9150_charger {
  30         struct da9150 *da9150;
  31         struct device *dev;
  32
  33         struct power_supply *usb;
  34         struct power_supply *battery;
  35         struct power_supply *supply_online;
  36
  37         struct usb_phy *usb_phy;
  38         struct notifier_block otg_nb;
  39         struct work_struct otg_work;
  40         unsigned long usb_event;
  41
  42         struct iio_channel *ibus_chan;
  43         struct iio_channel *vbus_chan;
  44         struct iio_channel *tjunc_chan;
  45         struct iio_channel *vbat_chan;
  46 };
  47
  48 static inline int da9150_charger_supply_online(struct da9150_charger *charger,
  49                                                struct power_supply *psy,
  50                                                union power_supply_propval *val)
  51 {
  52         val->intval = (psy == charger->supply_online) ? 1 : 0;
  53
  54         return 0;
  55 }
  56
  57 /* Charger Properties */
  58 static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
  59                                            union power_supply_propval *val)
  60 {
  61         int v_val, ret;
  62
  63         /* Read processed value - mV units */
  64         ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
  65         if (ret < 0)
  66                 return ret;
  67
  68         /* Convert voltage to expected uV units */
  69         val->intval = v_val * 1000;
  70
  71         return 0;
  72 }
  73
  74 static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
  75                                            union power_supply_propval *val)
  76 {
  77         int i_val, ret;
  78
  79         /* Read processed value - mA units */
  80         ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
  81         if (ret < 0)
  82                 return ret;
  83
  84         /* Convert current to expected uA units */
  85         val->intval = i_val * 1000;
  86
  87         return 0;
  88 }
  89
  90 static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
  91                                      union power_supply_propval *val)
  92 {
  93         int t_val, ret;
  94
  95         /* Read processed value - 0.001 degrees C units */
  96         ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
  97         if (ret < 0)
  98                 return ret;
  99
 100         /* Convert temp to expect 0.1 degrees C units */
 101         val->intval = t_val / 100;
 102
 103         return 0;
 104 }
 105
 106 static enum power_supply_property da9150_charger_props[] = {
 107         POWER_SUPPLY_PROP_ONLINE,
 108         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 109         POWER_SUPPLY_PROP_CURRENT_AVG,
 110         POWER_SUPPLY_PROP_TEMP,
 111 };
 112
 113 static int da9150_charger_get_prop(struct power_supply *psy,
 114                                    enum power_supply_property psp,
 115                                    union power_supply_propval *val)
 116 {
 117         struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
 118         int ret;
 119
 120         switch (psp) {
 121         case POWER_SUPPLY_PROP_ONLINE:
 122                 ret = da9150_charger_supply_online(charger, psy, val);
 123                 break;
 124         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 125                 ret = da9150_charger_vbus_voltage_now(charger, val);
 126                 break;
 127         case POWER_SUPPLY_PROP_CURRENT_AVG:
 128                 ret = da9150_charger_ibus_current_avg(charger, val);
 129                 break;
 130         case POWER_SUPPLY_PROP_TEMP:
 131                 ret = da9150_charger_tjunc_temp(charger, val);
 132                 break;
 133         default:
 134                 ret = -EINVAL;
 135                 break;
 136         }
 137
 138         return ret;
 139 }
 140
 141 /* Battery Properties */
 142 static int da9150_charger_battery_status(struct da9150_charger *charger,
 143                                          union power_supply_propval *val)
 144 {
 145         u8 reg;
 146
 147         /* Check to see if battery is discharging */
 148         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
 149
 150         if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
 151             ((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
 152                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 153
 154                 return 0;
 155         }
 156
 157         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 158
 159         /* Now check for other states */
 160         switch (reg & DA9150_CHG_STAT_MASK) {
 161         case DA9150_CHG_STAT_ACT:
 162         case DA9150_CHG_STAT_PRE:
 163         case DA9150_CHG_STAT_CC:
 164         case DA9150_CHG_STAT_CV:
 165                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 166                 break;
 167         case DA9150_CHG_STAT_OFF:
 168         case DA9150_CHG_STAT_SUSP:
 169         case DA9150_CHG_STAT_TEMP:
 170         case DA9150_CHG_STAT_TIME:
 171         case DA9150_CHG_STAT_BAT:
 172                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 173                 break;
 174         case DA9150_CHG_STAT_FULL:
 175                 val->intval = POWER_SUPPLY_STATUS_FULL;
 176                 break;
 177         default:
 178                 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 179                 break;
 180         }
 181
 182         return 0;
 183 }
 184
 185 static int da9150_charger_battery_health(struct da9150_charger *charger,
 186                                          union power_supply_propval *val)
 187 {
 188         u8 reg;
 189
 190         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 191
 192         /* Check if temperature limit reached */
 193         switch (reg & DA9150_CHG_TEMP_MASK) {
 194         case DA9150_CHG_TEMP_UNDER:
 195                 val->intval = POWER_SUPPLY_HEALTH_COLD;
 196                 return 0;
 197         case DA9150_CHG_TEMP_OVER:
 198                 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 199                 return 0;
 200         default:
 201                 break;
 202         }
 203
 204         /* Check for other health states */
 205         switch (reg & DA9150_CHG_STAT_MASK) {
 206         case DA9150_CHG_STAT_ACT:
 207         case DA9150_CHG_STAT_PRE:
 208                 val->intval = POWER_SUPPLY_HEALTH_DEAD;
 209                 break;
 210         case DA9150_CHG_STAT_TIME:
 211                 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 212                 break;
 213         default:
 214                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 215                 break;
 216         }
 217
 218         return 0;
 219 }
 220
 221 static int da9150_charger_battery_present(struct da9150_charger *charger,
 222                                           union power_supply_propval *val)
 223 {
 224         u8 reg;
 225
 226         /* Check if battery present or removed */
 227         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 228         if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
 229                 val->intval = 0;
 230         else
 231                 val->intval = 1;
 232
 233         return 0;
 234 }
 235
 236 static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
 237                                               union power_supply_propval *val)
 238 {
 239         u8 reg;
 240
 241         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
 242
 243         switch (reg & DA9150_CHG_STAT_MASK) {
 244         case DA9150_CHG_STAT_CC:
 245                 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
 246                 break;
 247         case DA9150_CHG_STAT_ACT:
 248         case DA9150_CHG_STAT_PRE:
 249         case DA9150_CHG_STAT_CV:
 250                 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
 251                 break;
 252         default:
 253                 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 254                 break;
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
 261                                               union power_supply_propval *val)
 262 {
 263         u8 reg;
 264
 265         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
 266
 267         /* Value starts at 2500 mV, 50 mV increments, presented in uV */
 268         val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
 269
 270         return 0;
 271 }
 272
 273 static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
 274                                               union power_supply_propval *val)
 275 {
 276         int v_val, ret;
 277
 278         /* Read processed value - mV units */
 279         ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
 280         if (ret < 0)
 281                 return ret;
 282
 283         val->intval = v_val * 1000;
 284
 285         return 0;
 286 }
 287
 288 static int da9150_charger_battery_current_max(struct da9150_charger *charger,
 289                                               union power_supply_propval *val)
 290 {
 291         int reg;
 292
 293         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
 294
 295         /* 25mA increments */
 296         val->intval = reg * 25000;
 297
 298         return 0;
 299 }
 300
 301 static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
 302                                               union power_supply_propval *val)
 303 {
 304         u8 reg;
 305
 306         reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
 307
 308         /* Value starts at 3650 mV, 25 mV increments, presented in uV */
 309         val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
 310         return 0;
 311 }
 312
 313 static enum power_supply_property da9150_charger_bat_props[] = {
 314         POWER_SUPPLY_PROP_STATUS,
 315         POWER_SUPPLY_PROP_ONLINE,
 316         POWER_SUPPLY_PROP_HEALTH,
 317         POWER_SUPPLY_PROP_PRESENT,
 318         POWER_SUPPLY_PROP_CHARGE_TYPE,
 319         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 320         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 321         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 322         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 323 };
 324
 325 static int da9150_charger_battery_get_prop(struct power_supply *psy,
 326                                            enum power_supply_property psp,
 327                                            union power_supply_propval *val)
 328 {
 329         struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
 330         int ret;
 331
 332         switch (psp) {
 333         case POWER_SUPPLY_PROP_STATUS:
 334                 ret = da9150_charger_battery_status(charger, val);
 335                 break;
 336         case POWER_SUPPLY_PROP_ONLINE:
 337                 ret = da9150_charger_supply_online(charger, psy, val);
 338                 break;
 339         case POWER_SUPPLY_PROP_HEALTH:
 340                 ret = da9150_charger_battery_health(charger, val);
 341                 break;
 342         case POWER_SUPPLY_PROP_PRESENT:
 343                 ret = da9150_charger_battery_present(charger, val);
 344                 break;
 345         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 346                 ret = da9150_charger_battery_charge_type(charger, val);
 347                 break;
 348         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 349                 ret = da9150_charger_battery_voltage_min(charger, val);
 350                 break;
 351         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 352                 ret = da9150_charger_battery_voltage_now(charger, val);
 353                 break;
 354         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 355                 ret = da9150_charger_battery_current_max(charger, val);
 356                 break;
 357         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 358                 ret = da9150_charger_battery_voltage_max(charger, val);
 359                 break;
 360         default:
 361                 ret = -EINVAL;
 362                 break;
 363         }
 364
 365         return ret;
 366 }
 367
 368 static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
 369 {
 370         struct da9150_charger *charger = data;
 371
 372         power_supply_changed(charger->battery);
 373
 374         return IRQ_HANDLED;
 375 }
 376
 377 static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
 378 {
 379         struct da9150_charger *charger = data;
 380
 381         /* Nothing we can really do except report this. */
 382         dev_crit(charger->dev, "TJunc over temperature!!!\n");
 383         power_supply_changed(charger->usb);
 384
 385         return IRQ_HANDLED;
 386 }
 387
 388 static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
 389 {
 390         struct da9150_charger *charger = data;
 391
 392         /* Nothing we can really do except report this. */
 393         dev_crit(charger->dev, "VSYS under voltage!!!\n");
 394         power_supply_changed(charger->usb);
 395         power_supply_changed(charger->battery);
 396
 397         return IRQ_HANDLED;
 398 }
 399
 400 static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
 401 {
 402         struct da9150_charger *charger = data;
 403         u8 reg;
 404
 405         reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
 406
 407         /* Charger plugged in or battery only */
 408         switch (reg & DA9150_VBUS_STAT_MASK) {
 409         case DA9150_VBUS_STAT_OFF:
 410         case DA9150_VBUS_STAT_WAIT:
 411                 charger->supply_online = charger->battery;
 412                 break;
 413         case DA9150_VBUS_STAT_CHG:
 414                 charger->supply_online = charger->usb;
 415                 break;
 416         default:
 417                 dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
 418                          reg);
 419                 charger->supply_online = NULL;
 420                 break;
 421         }
 422
 423         power_supply_changed(charger->usb);
 424         power_supply_changed(charger->battery);
 425
 426         return IRQ_HANDLED;
 427 }
 428
 429 static void da9150_charger_otg_work(struct work_struct *data)
 430 {
 431         struct da9150_charger *charger =
 432                 container_of(data, struct da9150_charger, otg_work);
 433
 434         switch (charger->usb_event) {
 435         case USB_EVENT_ID:
 436                 /* Enable OTG Boost */
 437                 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
 438                                 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
 439                 break;
 440         case USB_EVENT_NONE:
 441                 /* Revert to charge mode */
 442                 power_supply_changed(charger->usb);
 443                 power_supply_changed(charger->battery);
 444                 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
 445                                 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
 446                 break;
 447         }
 448 }
 449
 450 static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
 451                                   void *priv)
 452 {
 453         struct da9150_charger *charger =
 454                 container_of(nb, struct da9150_charger, otg_nb);
 455
 456         dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
 457
 458         charger->usb_event = val;
 459         schedule_work(&charger->otg_work);
 460
 461         return NOTIFY_OK;
 462 }
 463
 464 static int da9150_charger_register_irq(struct platform_device *pdev,
 465                                        irq_handler_t handler,
 466                                        const char *irq_name)
 467 {
 468         struct device *dev = &pdev->dev;
 469         struct da9150_charger *charger = platform_get_drvdata(pdev);
 470         int irq, ret;
 471
 472         irq = platform_get_irq_byname(pdev, irq_name);
 473         if (irq < 0) {
 474                 dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
 475                 return irq;
 476         }
 477
 478         ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
 479                                    charger);
 480         if (ret)
 481                 dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
 482
 483         return ret;
 484 }
 485
 486 static void da9150_charger_unregister_irq(struct platform_device *pdev,
 487                                           const char *irq_name)
 488 {
 489         struct device *dev = &pdev->dev;
 490         struct da9150_charger *charger = platform_get_drvdata(pdev);
 491         int irq;
 492
 493         irq = platform_get_irq_byname(pdev, irq_name);
 494         if (irq < 0) {
 495                 dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
 496                 return;
 497         }
 498
 499         free_irq(irq, charger);
 500 }
 501
 502 static const struct power_supply_desc usb_desc = {
 503         .name           = "da9150-usb",
 504         .type           = POWER_SUPPLY_TYPE_USB,
 505         .properties     = da9150_charger_props,
 506         .num_properties = ARRAY_SIZE(da9150_charger_props),
 507         .get_property   = da9150_charger_get_prop,
 508 };
 509
 510 static const struct power_supply_desc battery_desc = {
 511         .name           = "da9150-battery",
 512         .type           = POWER_SUPPLY_TYPE_BATTERY,
 513         .properties     = da9150_charger_bat_props,
 514         .num_properties = ARRAY_SIZE(da9150_charger_bat_props),
 515         .get_property   = da9150_charger_battery_get_prop,
 516 };
 517
 518 static int da9150_charger_probe(struct platform_device *pdev)
 519 {
 520         struct device *dev = &pdev->dev;
 521         struct da9150 *da9150 = dev_get_drvdata(dev->parent);
 522         struct da9150_charger *charger;
 523         u8 reg;
 524         int ret;
 525
 526         charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
 527         if (!charger)
 528                 return -ENOMEM;
 529
 530         platform_set_drvdata(pdev, charger);
 531         charger->da9150 = da9150;
 532         charger->dev = dev;
 533
 534         /* Acquire ADC channels */
 535         charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
 536         if (IS_ERR(charger->ibus_chan)) {
 537                 ret = PTR_ERR(charger->ibus_chan);
 538                 goto ibus_chan_fail;
 539         }
 540
 541         charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
 542         if (IS_ERR(charger->vbus_chan)) {
 543                 ret = PTR_ERR(charger->vbus_chan);
 544                 goto vbus_chan_fail;
 545         }
 546
 547         charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
 548         if (IS_ERR(charger->tjunc_chan)) {
 549                 ret = PTR_ERR(charger->tjunc_chan);
 550                 goto tjunc_chan_fail;
 551         }
 552
 553         charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
 554         if (IS_ERR(charger->vbat_chan)) {
 555                 ret = PTR_ERR(charger->vbat_chan);
 556                 goto vbat_chan_fail;
 557         }
 558
 559         /* Register power supplies */
 560         charger->usb = power_supply_register(dev, &usb_desc, NULL);
 561         if (IS_ERR(charger->usb)) {
 562                 ret = PTR_ERR(charger->usb);
 563                 goto usb_fail;
 564         }
 565
 566         charger->battery = power_supply_register(dev, &battery_desc, NULL);
 567         if (IS_ERR(charger->battery)) {
 568                 ret = PTR_ERR(charger->battery);
 569                 goto battery_fail;
 570         }
 571
 572         /* Get initial online supply */
 573         reg = da9150_reg_read(da9150, DA9150_STATUS_H);
 574
 575         switch (reg & DA9150_VBUS_STAT_MASK) {
 576         case DA9150_VBUS_STAT_OFF:
 577         case DA9150_VBUS_STAT_WAIT:
 578                 charger->supply_online = charger->battery;
 579                 break;
 580         case DA9150_VBUS_STAT_CHG:
 581                 charger->supply_online = charger->usb;
 582                 break;
 583         default:
 584                 dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
 585                 charger->supply_online = NULL;
 586                 break;
 587         }
 588
 589         /* Setup OTG reporting & configuration */
 590         charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 591         if (!IS_ERR_OR_NULL(charger->usb_phy)) {
 592                 INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
 593                 charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
 594                 usb_register_notifier(charger->usb_phy, &charger->otg_nb);
 595         }
 596
 597         /* Register IRQs */
 598         ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
 599                                           "CHG_STATUS");
 600         if (ret < 0)
 601                 goto chg_irq_fail;
 602
 603         ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
 604                                           "CHG_TJUNC");
 605         if (ret < 0)
 606                 goto tjunc_irq_fail;
 607
 608         ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
 609                                           "CHG_VFAULT");
 610         if (ret < 0)
 611                 goto vfault_irq_fail;
 612
 613         ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
 614                                           "CHG_VBUS");
 615         if (ret < 0)
 616                 goto vbus_irq_fail;
 617
 618         return 0;
 619
 620
 621 vbus_irq_fail:
 622         da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
 623 vfault_irq_fail:
 624         da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
 625 tjunc_irq_fail:
 626         da9150_charger_unregister_irq(pdev, "CHG_STATUS");
 627 chg_irq_fail:
 628         if (!IS_ERR_OR_NULL(charger->usb_phy))
 629                 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
 630 battery_fail:
 631         power_supply_unregister(charger->usb);
 632
 633 usb_fail:
 634         iio_channel_release(charger->vbat_chan);
 635
 636 vbat_chan_fail:
 637         iio_channel_release(charger->tjunc_chan);
 638
 639 tjunc_chan_fail:
 640         iio_channel_release(charger->vbus_chan);
 641
 642 vbus_chan_fail:
 643         iio_channel_release(charger->ibus_chan);
 644
 645 ibus_chan_fail:
 646         return ret;
 647 }
 648
 649 static int da9150_charger_remove(struct platform_device *pdev)
 650 {
 651         struct da9150_charger *charger = platform_get_drvdata(pdev);
 652         int irq;
 653
 654         /* Make sure IRQs are released before unregistering power supplies */
 655         irq = platform_get_irq_byname(pdev, "CHG_VBUS");
 656         free_irq(irq, charger);
 657
 658         irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
 659         free_irq(irq, charger);
 660
 661         irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
 662         free_irq(irq, charger);
 663
 664         irq = platform_get_irq_byname(pdev, "CHG_STATUS");
 665         free_irq(irq, charger);
 666
 667         if (!IS_ERR_OR_NULL(charger->usb_phy))
 668                 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
 669
 670         power_supply_unregister(charger->battery);
 671         power_supply_unregister(charger->usb);
 672
 673         /* Release ADC channels */
 674         iio_channel_release(charger->ibus_chan);
 675         iio_channel_release(charger->vbus_chan);
 676         iio_channel_release(charger->tjunc_chan);
 677         iio_channel_release(charger->vbat_chan);
 678
 679         return 0;
 680 }
 681
 682 static struct platform_driver da9150_charger_driver = {
 683         .driver = {
 684                 .name = "da9150-charger",
 685         },
 686         .probe = da9150_charger_probe,
 687         .remove = da9150_charger_remove,
 688 };
 689
 690 module_platform_driver(da9150_charger_driver);
 691
 692 MODULE_DESCRIPTION("Charger Driver for DA9150");
 693 MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
 694 MODULE_LICENSE("GPL");