drivers/power/supply/axp20x_usb_power.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * AXP20x PMIC USB power supply status driver
   4  *
   5  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
   6  * Copyright (C) 2014 Bruno Prémont <bonbons@linux-vserver.org>
   7  */
   8
   9 #include <linux/bitops.h>
  10 #include <linux/device.h>
  11 #include <linux/devm-helpers.h>
  12 #include <linux/init.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/kernel.h>
  15 #include <linux/mfd/axp20x.h>
  16 #include <linux/module.h>
  17 #include <linux/of.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/pm.h>
  20 #include <linux/power_supply.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23 #include <linux/iio/consumer.h>
  24 #include <linux/workqueue.h>
  25
  26 #define DRVNAME "axp20x-usb-power-supply"
  27
  28 #define AXP192_USB_OTG_STATUS           0x04
  29
  30 #define AXP20X_PWR_STATUS_VBUS_PRESENT  BIT(5)
  31 #define AXP20X_PWR_STATUS_VBUS_USED     BIT(4)
  32
  33 #define AXP20X_USB_STATUS_VBUS_VALID    BIT(2)
  34
  35 #define AXP20X_VBUS_VHOLD_uV(b)         (4000000 + (((b) >> 3) & 7) * 100000)
  36 #define AXP20X_VBUS_VHOLD_MASK          GENMASK(5, 3)
  37 #define AXP20X_VBUS_VHOLD_OFFSET        3
  38
  39 #define AXP20X_ADC_EN1_VBUS_CURR        BIT(2)
  40 #define AXP20X_ADC_EN1_VBUS_VOLT        BIT(3)
  41
  42 /*
  43  * Note do not raise the debounce time, we must report Vusb high within
  44  * 100ms otherwise we get Vbus errors in musb.
  45  */
  46 #define DEBOUNCE_TIME                   msecs_to_jiffies(50)
  47
  48 struct axp_data {
  49         const struct power_supply_desc  *power_desc;
  50         const char * const              *irq_names;
  51         unsigned int                    num_irq_names;
  52         const int                       *curr_lim_table;
  53         struct reg_field                curr_lim_fld;
  54         struct reg_field                vbus_valid_bit;
  55         struct reg_field                vbus_mon_bit;
  56         struct reg_field                usb_bc_en_bit;
  57         struct reg_field                vbus_disable_bit;
  58         bool                            vbus_needs_polling: 1;
  59 };
  60
  61 struct axp20x_usb_power {
  62         struct regmap *regmap;
  63         struct regmap_field *curr_lim_fld;
  64         struct regmap_field *vbus_valid_bit;
  65         struct regmap_field *vbus_mon_bit;
  66         struct regmap_field *usb_bc_en_bit;
  67         struct regmap_field *vbus_disable_bit;
  68         struct power_supply *supply;
  69         const struct axp_data *axp_data;
  70         struct iio_channel *vbus_v;
  71         struct iio_channel *vbus_i;
  72         struct delayed_work vbus_detect;
  73         unsigned int old_status;
  74         unsigned int online;
  75         unsigned int num_irqs;
  76         unsigned int irqs[] __counted_by(num_irqs);
  77 };
  78
  79 static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power)
  80 {
  81         /*
  82          * Polling is only necessary while VBUS is offline. While online, a
  83          * present->absent transition implies an online->offline transition
  84          * and will trigger the VBUS_REMOVAL IRQ.
  85          */
  86         if (power->axp_data->vbus_needs_polling && !power->online)
  87                 return true;
  88
  89         return false;
  90 }
  91
  92 static irqreturn_t axp20x_usb_power_irq(int irq, void *devid)
  93 {
  94         struct axp20x_usb_power *power = devid;
  95
  96         power_supply_changed(power->supply);
  97
  98         mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
  99
 100         return IRQ_HANDLED;
 101 }
 102
 103 static void axp20x_usb_power_poll_vbus(struct work_struct *work)
 104 {
 105         struct axp20x_usb_power *power =
 106                 container_of(work, struct axp20x_usb_power, vbus_detect.work);
 107         unsigned int val;
 108         int ret;
 109
 110         ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &val);
 111         if (ret)
 112                 goto out;
 113
 114         val &= (AXP20X_PWR_STATUS_VBUS_PRESENT | AXP20X_PWR_STATUS_VBUS_USED);
 115         if (val != power->old_status)
 116                 power_supply_changed(power->supply);
 117
 118         power->old_status = val;
 119         power->online = val & AXP20X_PWR_STATUS_VBUS_USED;
 120
 121 out:
 122         if (axp20x_usb_vbus_needs_polling(power))
 123                 mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
 124 }
 125
 126 static int axp20x_usb_power_get_property(struct power_supply *psy,
 127         enum power_supply_property psp, union power_supply_propval *val)
 128 {
 129         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 130         unsigned int input, v;
 131         int ret;
 132
 133         switch (psp) {
 134         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 135                 ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
 136                 if (ret)
 137                         return ret;
 138
 139                 val->intval = AXP20X_VBUS_VHOLD_uV(v);
 140                 return 0;
 141         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 142                 if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
 143                         ret = iio_read_channel_processed(power->vbus_v,
 144                                                          &val->intval);
 145                         if (ret)
 146                                 return ret;
 147
 148                         /*
 149                          * IIO framework gives mV but Power Supply framework
 150                          * gives uV.
 151                          */
 152                         val->intval *= 1000;
 153                         return 0;
 154                 }
 155
 156                 ret = axp20x_read_variable_width(power->regmap,
 157                                                  AXP20X_VBUS_V_ADC_H, 12);
 158                 if (ret < 0)
 159                         return ret;
 160
 161                 val->intval = ret * 1700; /* 1 step = 1.7 mV */
 162                 return 0;
 163         case POWER_SUPPLY_PROP_CURRENT_MAX:
 164                 ret = regmap_field_read(power->curr_lim_fld, &v);
 165                 if (ret)
 166                         return ret;
 167
 168                 val->intval = power->axp_data->curr_lim_table[v];
 169                 return 0;
 170         case POWER_SUPPLY_PROP_CURRENT_NOW:
 171                 if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
 172                         ret = iio_read_channel_processed(power->vbus_i,
 173                                                          &val->intval);
 174                         if (ret)
 175                                 return ret;
 176
 177                         /*
 178                          * IIO framework gives mA but Power Supply framework
 179                          * gives uA.
 180                          */
 181                         val->intval *= 1000;
 182                         return 0;
 183                 }
 184
 185                 ret = axp20x_read_variable_width(power->regmap,
 186                                                  AXP20X_VBUS_I_ADC_H, 12);
 187                 if (ret < 0)
 188                         return ret;
 189
 190                 val->intval = ret * 375; /* 1 step = 0.375 mA */
 191                 return 0;
 192         default:
 193                 break;
 194         }
 195
 196         /* All the properties below need the input-status reg value */
 197         ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &input);
 198         if (ret)
 199                 return ret;
 200
 201         switch (psp) {
 202         case POWER_SUPPLY_PROP_HEALTH:
 203                 if (!(input & AXP20X_PWR_STATUS_VBUS_PRESENT)) {
 204                         val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
 205                         break;
 206                 }
 207
 208                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 209
 210                 if (power->vbus_valid_bit) {
 211                         ret = regmap_field_read(power->vbus_valid_bit, &v);
 212                         if (ret)
 213                                 return ret;
 214
 215                         if (v == 0)
 216                                 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 217                 }
 218
 219                 break;
 220         case POWER_SUPPLY_PROP_PRESENT:
 221                 val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_PRESENT);
 222                 break;
 223         case POWER_SUPPLY_PROP_ONLINE:
 224                 val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_USED);
 225                 break;
 226         default:
 227                 return -EINVAL;
 228         }
 229
 230         return 0;
 231 }
 232
 233 static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
 234                                             int intval)
 235 {
 236         int val;
 237
 238         switch (intval) {
 239         case 4000000:
 240         case 4100000:
 241         case 4200000:
 242         case 4300000:
 243         case 4400000:
 244         case 4500000:
 245         case 4600000:
 246         case 4700000:
 247                 val = (intval - 4000000) / 100000;
 248                 return regmap_update_bits(power->regmap,
 249                                           AXP20X_VBUS_IPSOUT_MGMT,
 250                                           AXP20X_VBUS_VHOLD_MASK,
 251                                           val << AXP20X_VBUS_VHOLD_OFFSET);
 252         default:
 253                 return -EINVAL;
 254         }
 255
 256         return -EINVAL;
 257 }
 258
 259 static int axp20x_usb_power_set_current_max(struct axp20x_usb_power *power, int intval)
 260 {
 261         const unsigned int max = GENMASK(power->axp_data->curr_lim_fld.msb,
 262                                          power->axp_data->curr_lim_fld.lsb);
 263
 264         if (intval == -1)
 265                 return -EINVAL;
 266
 267         for (unsigned int i = 0; i <= max; ++i)
 268                 if (power->axp_data->curr_lim_table[i] == intval)
 269                         return regmap_field_write(power->curr_lim_fld, i);
 270
 271         return -EINVAL;
 272 }
 273
 274 static int axp20x_usb_power_set_property(struct power_supply *psy,
 275                                          enum power_supply_property psp,
 276                                          const union power_supply_propval *val)
 277 {
 278         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 279
 280         switch (psp) {
 281         case POWER_SUPPLY_PROP_ONLINE:
 282                 if (!power->vbus_disable_bit)
 283                         return -EINVAL;
 284
 285                 return regmap_field_write(power->vbus_disable_bit, !val->intval);
 286
 287         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 288                 return axp20x_usb_power_set_voltage_min(power, val->intval);
 289
 290         case POWER_SUPPLY_PROP_CURRENT_MAX:
 291                 return axp20x_usb_power_set_current_max(power, val->intval);
 292
 293         default:
 294                 return -EINVAL;
 295         }
 296
 297         return -EINVAL;
 298 }
 299
 300 static int axp20x_usb_power_prop_writeable(struct power_supply *psy,
 301                                            enum power_supply_property psp)
 302 {
 303         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 304
 305         /*
 306          * The VBUS path select flag works differently on AXP288 and newer:
 307          *  - On AXP20x and AXP22x, the flag enables VBUS (ignoring N_VBUSEN).
 308          *  - On AXP288 and AXP8xx, the flag disables VBUS (ignoring N_VBUSEN).
 309          * We only expose the control on variants where it can be used to force
 310          * the VBUS input offline.
 311          */
 312         if (psp == POWER_SUPPLY_PROP_ONLINE)
 313                 return power->vbus_disable_bit != NULL;
 314
 315         return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
 316                psp == POWER_SUPPLY_PROP_CURRENT_MAX;
 317 }
 318
 319 static enum power_supply_property axp20x_usb_power_properties[] = {
 320         POWER_SUPPLY_PROP_HEALTH,
 321         POWER_SUPPLY_PROP_PRESENT,
 322         POWER_SUPPLY_PROP_ONLINE,
 323         POWER_SUPPLY_PROP_VOLTAGE_MIN,
 324         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 325         POWER_SUPPLY_PROP_CURRENT_MAX,
 326         POWER_SUPPLY_PROP_CURRENT_NOW,
 327 };
 328
 329 static enum power_supply_property axp22x_usb_power_properties[] = {
 330         POWER_SUPPLY_PROP_HEALTH,
 331         POWER_SUPPLY_PROP_PRESENT,
 332         POWER_SUPPLY_PROP_ONLINE,
 333         POWER_SUPPLY_PROP_VOLTAGE_MIN,
 334         POWER_SUPPLY_PROP_CURRENT_MAX,
 335 };
 336
 337 static const struct power_supply_desc axp20x_usb_power_desc = {
 338         .name = "axp20x-usb",
 339         .type = POWER_SUPPLY_TYPE_USB,
 340         .properties = axp20x_usb_power_properties,
 341         .num_properties = ARRAY_SIZE(axp20x_usb_power_properties),
 342         .property_is_writeable = axp20x_usb_power_prop_writeable,
 343         .get_property = axp20x_usb_power_get_property,
 344         .set_property = axp20x_usb_power_set_property,
 345 };
 346
 347 static const struct power_supply_desc axp22x_usb_power_desc = {
 348         .name = "axp20x-usb",
 349         .type = POWER_SUPPLY_TYPE_USB,
 350         .properties = axp22x_usb_power_properties,
 351         .num_properties = ARRAY_SIZE(axp22x_usb_power_properties),
 352         .property_is_writeable = axp20x_usb_power_prop_writeable,
 353         .get_property = axp20x_usb_power_get_property,
 354         .set_property = axp20x_usb_power_set_property,
 355 };
 356
 357 static const char * const axp20x_irq_names[] = {
 358         "VBUS_PLUGIN",
 359         "VBUS_REMOVAL",
 360         "VBUS_VALID",
 361         "VBUS_NOT_VALID",
 362 };
 363
 364 static const char * const axp22x_irq_names[] = {
 365         "VBUS_PLUGIN",
 366         "VBUS_REMOVAL",
 367 };
 368
 369 static int axp192_usb_curr_lim_table[] = {
 370         -1,
 371         -1,
 372         500000,
 373         100000,
 374 };
 375
 376 static int axp20x_usb_curr_lim_table[] = {
 377         900000,
 378         500000,
 379         100000,
 380         -1,
 381 };
 382
 383 static int axp221_usb_curr_lim_table[] = {
 384         900000,
 385         500000,
 386         -1,
 387         -1,
 388 };
 389
 390 static int axp813_usb_curr_lim_table[] = {
 391         900000,
 392         1500000,
 393         2000000,
 394         2500000,
 395 };
 396
 397 static const struct axp_data axp192_data = {
 398         .power_desc     = &axp20x_usb_power_desc,
 399         .irq_names      = axp20x_irq_names,
 400         .num_irq_names  = ARRAY_SIZE(axp20x_irq_names),
 401         .curr_lim_table = axp192_usb_curr_lim_table,
 402         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 403         .vbus_valid_bit = REG_FIELD(AXP192_USB_OTG_STATUS, 2, 2),
 404         .vbus_mon_bit   = REG_FIELD(AXP20X_VBUS_MON, 3, 3),
 405 };
 406
 407 static const struct axp_data axp202_data = {
 408         .power_desc     = &axp20x_usb_power_desc,
 409         .irq_names      = axp20x_irq_names,
 410         .num_irq_names  = ARRAY_SIZE(axp20x_irq_names),
 411         .curr_lim_table = axp20x_usb_curr_lim_table,
 412         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 413         .vbus_valid_bit = REG_FIELD(AXP20X_USB_OTG_STATUS, 2, 2),
 414         .vbus_mon_bit   = REG_FIELD(AXP20X_VBUS_MON, 3, 3),
 415 };
 416
 417 static const struct axp_data axp221_data = {
 418         .power_desc     = &axp22x_usb_power_desc,
 419         .irq_names      = axp22x_irq_names,
 420         .num_irq_names  = ARRAY_SIZE(axp22x_irq_names),
 421         .curr_lim_table = axp221_usb_curr_lim_table,
 422         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 423         .vbus_needs_polling = true,
 424 };
 425
 426 static const struct axp_data axp223_data = {
 427         .power_desc     = &axp22x_usb_power_desc,
 428         .irq_names      = axp22x_irq_names,
 429         .num_irq_names  = ARRAY_SIZE(axp22x_irq_names),
 430         .curr_lim_table = axp20x_usb_curr_lim_table,
 431         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 432         .vbus_needs_polling = true,
 433 };
 434
 435 static const struct axp_data axp813_data = {
 436         .power_desc     = &axp22x_usb_power_desc,
 437         .irq_names      = axp22x_irq_names,
 438         .num_irq_names  = ARRAY_SIZE(axp22x_irq_names),
 439         .curr_lim_table = axp813_usb_curr_lim_table,
 440         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 441         .usb_bc_en_bit  = REG_FIELD(AXP288_BC_GLOBAL, 0, 0),
 442         .vbus_disable_bit = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 7, 7),
 443         .vbus_needs_polling = true,
 444 };
 445
 446 #ifdef CONFIG_PM_SLEEP
 447 static int axp20x_usb_power_suspend(struct device *dev)
 448 {
 449         struct axp20x_usb_power *power = dev_get_drvdata(dev);
 450         int i = 0;
 451
 452         /*
 453          * Allow wake via VBUS_PLUGIN only.
 454          *
 455          * As nested threaded IRQs are not automatically disabled during
 456          * suspend, we must explicitly disable the remainder of the IRQs.
 457          */
 458         if (device_may_wakeup(&power->supply->dev))
 459                 enable_irq_wake(power->irqs[i++]);
 460         while (i < power->num_irqs)
 461                 disable_irq(power->irqs[i++]);
 462
 463         return 0;
 464 }
 465
 466 static int axp20x_usb_power_resume(struct device *dev)
 467 {
 468         struct axp20x_usb_power *power = dev_get_drvdata(dev);
 469         int i = 0;
 470
 471         if (device_may_wakeup(&power->supply->dev))
 472                 disable_irq_wake(power->irqs[i++]);
 473         while (i < power->num_irqs)
 474                 enable_irq(power->irqs[i++]);
 475
 476         mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
 477
 478         return 0;
 479 }
 480 #endif
 481
 482 static SIMPLE_DEV_PM_OPS(axp20x_usb_power_pm_ops, axp20x_usb_power_suspend,
 483                                                   axp20x_usb_power_resume);
 484
 485 static int configure_iio_channels(struct platform_device *pdev,
 486                                   struct axp20x_usb_power *power)
 487 {
 488         power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
 489         if (IS_ERR(power->vbus_v)) {
 490                 if (PTR_ERR(power->vbus_v) == -ENODEV)
 491                         return -EPROBE_DEFER;
 492                 return PTR_ERR(power->vbus_v);
 493         }
 494
 495         power->vbus_i = devm_iio_channel_get(&pdev->dev, "vbus_i");
 496         if (IS_ERR(power->vbus_i)) {
 497                 if (PTR_ERR(power->vbus_i) == -ENODEV)
 498                         return -EPROBE_DEFER;
 499                 return PTR_ERR(power->vbus_i);
 500         }
 501
 502         return 0;
 503 }
 504
 505 static int configure_adc_registers(struct axp20x_usb_power *power)
 506 {
 507         /* Enable vbus voltage and current measurement */
 508         return regmap_update_bits(power->regmap, AXP20X_ADC_EN1,
 509                                   AXP20X_ADC_EN1_VBUS_CURR |
 510                                   AXP20X_ADC_EN1_VBUS_VOLT,
 511                                   AXP20X_ADC_EN1_VBUS_CURR |
 512                                   AXP20X_ADC_EN1_VBUS_VOLT);
 513 }
 514
 515 static int axp20x_regmap_field_alloc_optional(struct device *dev,
 516                                               struct regmap *regmap,
 517                                               struct reg_field fdesc,
 518                                               struct regmap_field **fieldp)
 519 {
 520         struct regmap_field *field;
 521
 522         if (fdesc.reg == 0) {
 523                 *fieldp = NULL;
 524                 return 0;
 525         }
 526
 527         field = devm_regmap_field_alloc(dev, regmap, fdesc);
 528         if (IS_ERR(field))
 529                 return PTR_ERR(field);
 530
 531         *fieldp = field;
 532         return 0;
 533 }
 534
 535 static int axp20x_usb_power_probe(struct platform_device *pdev)
 536 {
 537         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 538         struct power_supply_config psy_cfg = {};
 539         struct axp20x_usb_power *power;
 540         const struct axp_data *axp_data;
 541         int i, irq, ret;
 542
 543         if (!of_device_is_available(pdev->dev.of_node))
 544                 return -ENODEV;
 545
 546         if (!axp20x) {
 547                 dev_err(&pdev->dev, "Parent drvdata not set\n");
 548                 return -EINVAL;
 549         }
 550
 551         axp_data = of_device_get_match_data(&pdev->dev);
 552
 553         power = devm_kzalloc(&pdev->dev,
 554                              struct_size(power, irqs, axp_data->num_irq_names),
 555                              GFP_KERNEL);
 556         if (!power)
 557                 return -ENOMEM;
 558
 559         platform_set_drvdata(pdev, power);
 560
 561         power->axp_data = axp_data;
 562         power->regmap = axp20x->regmap;
 563         power->num_irqs = axp_data->num_irq_names;
 564
 565         power->curr_lim_fld = devm_regmap_field_alloc(&pdev->dev, power->regmap,
 566                                                       axp_data->curr_lim_fld);
 567         if (IS_ERR(power->curr_lim_fld))
 568                 return PTR_ERR(power->curr_lim_fld);
 569
 570         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 571                                                  axp_data->vbus_valid_bit,
 572                                                  &power->vbus_valid_bit);
 573         if (ret)
 574                 return ret;
 575
 576         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 577                                                  axp_data->vbus_mon_bit,
 578                                                  &power->vbus_mon_bit);
 579         if (ret)
 580                 return ret;
 581
 582         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 583                                                  axp_data->usb_bc_en_bit,
 584                                                  &power->usb_bc_en_bit);
 585         if (ret)
 586                 return ret;
 587
 588         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 589                                                  axp_data->vbus_disable_bit,
 590                                                  &power->vbus_disable_bit);
 591         if (ret)
 592                 return ret;
 593
 594         ret = devm_delayed_work_autocancel(&pdev->dev, &power->vbus_detect,
 595                                            axp20x_usb_power_poll_vbus);
 596         if (ret)
 597                 return ret;
 598
 599         if (power->vbus_mon_bit) {
 600                 /* Enable vbus valid checking */
 601                 ret = regmap_field_write(power->vbus_mon_bit, 1);
 602                 if (ret)
 603                         return ret;
 604
 605                 if (IS_ENABLED(CONFIG_AXP20X_ADC))
 606                         ret = configure_iio_channels(pdev, power);
 607                 else
 608                         ret = configure_adc_registers(power);
 609
 610                 if (ret)
 611                         return ret;
 612         }
 613
 614         if (power->usb_bc_en_bit) {
 615                 /* Enable USB Battery Charging specification detection */
 616                 ret = regmap_field_write(power->usb_bc_en_bit, 1);
 617                 if (ret)
 618                         return ret;
 619         }
 620
 621         psy_cfg.of_node = pdev->dev.of_node;
 622         psy_cfg.drv_data = power;
 623
 624         power->supply = devm_power_supply_register(&pdev->dev,
 625                                                    axp_data->power_desc,
 626                                                    &psy_cfg);
 627         if (IS_ERR(power->supply))
 628                 return PTR_ERR(power->supply);
 629
 630         /* Request irqs after registering, as irqs may trigger immediately */
 631         for (i = 0; i < axp_data->num_irq_names; i++) {
 632                 irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
 633                 if (irq < 0)
 634                         return irq;
 635
 636                 power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
 637                 ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
 638                                                    axp20x_usb_power_irq, 0,
 639                                                    DRVNAME, power);
 640                 if (ret < 0) {
 641                         dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
 642                                 axp_data->irq_names[i], ret);
 643                         return ret;
 644                 }
 645         }
 646
 647         if (axp20x_usb_vbus_needs_polling(power))
 648                 queue_delayed_work(system_power_efficient_wq, &power->vbus_detect, 0);
 649
 650         return 0;
 651 }
 652
 653 static const struct of_device_id axp20x_usb_power_match[] = {
 654         {
 655                 .compatible = "x-powers,axp192-usb-power-supply",
 656                 .data = &axp192_data,
 657         }, {
 658                 .compatible = "x-powers,axp202-usb-power-supply",
 659                 .data = &axp202_data,
 660         }, {
 661                 .compatible = "x-powers,axp221-usb-power-supply",
 662                 .data = &axp221_data,
 663         }, {
 664                 .compatible = "x-powers,axp223-usb-power-supply",
 665                 .data = &axp223_data,
 666         }, {
 667                 .compatible = "x-powers,axp813-usb-power-supply",
 668                 .data = &axp813_data,
 669         }, { /* sentinel */ }
 670 };
 671 MODULE_DEVICE_TABLE(of, axp20x_usb_power_match);
 672
 673 static struct platform_driver axp20x_usb_power_driver = {
 674         .probe = axp20x_usb_power_probe,
 675         .driver = {
 676                 .name           = DRVNAME,
 677                 .of_match_table = axp20x_usb_power_match,
 678                 .pm             = &axp20x_usb_power_pm_ops,
 679         },
 680 };
 681
 682 module_platform_driver(axp20x_usb_power_driver);
 683
 684 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 685 MODULE_DESCRIPTION("AXP20x PMIC USB power supply status driver");
 686 MODULE_LICENSE("GPL");