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 AXP717_PWR_STATUS_VBUS_GOOD     BIT(5)
  34
  35 #define AXP20X_USB_STATUS_VBUS_VALID    BIT(2)
  36
  37 #define AXP717_PMU_FAULT_VBUS           BIT(5)
  38 #define AXP717_PMU_FAULT_VSYS           BIT(3)
  39
  40 #define AXP20X_VBUS_VHOLD_uV(b)         (4000000 + (((b) >> 3) & 7) * 100000)
  41 #define AXP20X_VBUS_VHOLD_MASK          GENMASK(5, 3)
  42 #define AXP20X_VBUS_VHOLD_OFFSET        3
  43
  44 #define AXP20X_ADC_EN1_VBUS_CURR        BIT(2)
  45 #define AXP20X_ADC_EN1_VBUS_VOLT        BIT(3)
  46
  47 #define AXP717_INPUT_VOL_LIMIT_MASK     GENMASK(3, 0)
  48 #define AXP717_INPUT_CUR_LIMIT_MASK     GENMASK(5, 0)
  49 #define AXP717_ADC_DATA_MASK            GENMASK(14, 0)
  50
  51 #define AXP717_ADC_EN_VBUS_VOLT         BIT(2)
  52
  53 /*
  54  * Note do not raise the debounce time, we must report Vusb high within
  55  * 100ms otherwise we get Vbus errors in musb.
  56  */
  57 #define DEBOUNCE_TIME                   msecs_to_jiffies(50)
  58
  59 struct axp20x_usb_power;
  60
  61 struct axp_data {
  62         const struct power_supply_desc  *power_desc;
  63         const char * const              *irq_names;
  64         unsigned int                    num_irq_names;
  65         const int                       *curr_lim_table;
  66         int                             curr_lim_table_size;
  67         struct reg_field                curr_lim_fld;
  68         struct reg_field                vbus_valid_bit;
  69         struct reg_field                vbus_mon_bit;
  70         struct reg_field                usb_bc_en_bit;
  71         struct reg_field                usb_bc_det_fld;
  72         struct reg_field                vbus_disable_bit;
  73         bool                            vbus_needs_polling: 1;
  74         void (*axp20x_read_vbus)(struct work_struct *work);
  75         int (*axp20x_cfg_iio_chan)(struct platform_device *pdev,
  76                                    struct axp20x_usb_power *power);
  77         int (*axp20x_cfg_adc_reg)(struct axp20x_usb_power *power);
  78 };
  79
  80 struct axp20x_usb_power {
  81         struct device *dev;
  82         struct regmap *regmap;
  83         struct regmap_field *curr_lim_fld;
  84         struct regmap_field *vbus_valid_bit;
  85         struct regmap_field *vbus_mon_bit;
  86         struct regmap_field *usb_bc_en_bit;
  87         struct regmap_field *usb_bc_det_fld;
  88         struct regmap_field *vbus_disable_bit;
  89         struct power_supply *supply;
  90         const struct axp_data *axp_data;
  91         struct iio_channel *vbus_v;
  92         struct iio_channel *vbus_i;
  93         struct delayed_work vbus_detect;
  94         int max_input_cur;
  95         unsigned int old_status;
  96         unsigned int online;
  97         unsigned int num_irqs;
  98         unsigned int irqs[] __counted_by(num_irqs);
  99 };
 100
 101 static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power)
 102 {
 103         /*
 104          * Polling is only necessary while VBUS is offline. While online, a
 105          * present->absent transition implies an online->offline transition
 106          * and will trigger the VBUS_REMOVAL IRQ.
 107          */
 108         if (power->axp_data->vbus_needs_polling && !power->online)
 109                 return true;
 110
 111         return false;
 112 }
 113
 114 static irqreturn_t axp20x_usb_power_irq(int irq, void *devid)
 115 {
 116         struct axp20x_usb_power *power = devid;
 117
 118         power_supply_changed(power->supply);
 119
 120         mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
 121
 122         return IRQ_HANDLED;
 123 }
 124
 125 static void axp20x_usb_power_poll_vbus(struct work_struct *work)
 126 {
 127         struct axp20x_usb_power *power =
 128                 container_of(work, struct axp20x_usb_power, vbus_detect.work);
 129         unsigned int val;
 130         int ret;
 131
 132         ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &val);
 133         if (ret)
 134                 goto out;
 135
 136         val &= (AXP20X_PWR_STATUS_VBUS_PRESENT | AXP20X_PWR_STATUS_VBUS_USED);
 137         if (val != power->old_status)
 138                 power_supply_changed(power->supply);
 139
 140         if (power->usb_bc_en_bit && (val & AXP20X_PWR_STATUS_VBUS_PRESENT) !=
 141                 (power->old_status & AXP20X_PWR_STATUS_VBUS_PRESENT)) {
 142                 dev_dbg(power->dev, "Cable status changed, re-enabling USB BC");
 143                 ret = regmap_field_write(power->usb_bc_en_bit, 1);
 144                 if (ret)
 145                         dev_err(power->dev, "failed to enable USB BC: errno %d",
 146                                 ret);
 147         }
 148
 149         power->old_status = val;
 150         power->online = val & AXP20X_PWR_STATUS_VBUS_USED;
 151
 152 out:
 153         if (axp20x_usb_vbus_needs_polling(power))
 154                 mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
 155 }
 156
 157 static void axp717_usb_power_poll_vbus(struct work_struct *work)
 158 {
 159         struct axp20x_usb_power *power =
 160                 container_of(work, struct axp20x_usb_power, vbus_detect.work);
 161         unsigned int val;
 162         int ret;
 163
 164         ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &val);
 165         if (ret)
 166                 return;
 167
 168         val &= AXP717_PWR_STATUS_VBUS_GOOD;
 169         if (val != power->old_status)
 170                 power_supply_changed(power->supply);
 171
 172         power->old_status = val;
 173 }
 174
 175 static int axp20x_get_usb_type(struct axp20x_usb_power *power,
 176                                union power_supply_propval *val)
 177 {
 178         unsigned int reg;
 179         int ret;
 180
 181         if (!power->usb_bc_det_fld)
 182                 return -EINVAL;
 183
 184         ret = regmap_field_read(power->usb_bc_det_fld, &reg);
 185         if (ret)
 186                 return ret;
 187
 188         switch (reg) {
 189         case 1:
 190                 val->intval = POWER_SUPPLY_USB_TYPE_SDP;
 191                 break;
 192         case 2:
 193                 val->intval = POWER_SUPPLY_USB_TYPE_CDP;
 194                 break;
 195         case 3:
 196                 val->intval = POWER_SUPPLY_USB_TYPE_DCP;
 197                 break;
 198         default:
 199                 val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
 200                 break;
 201         }
 202
 203         return 0;
 204 }
 205
 206 static int axp20x_usb_power_get_property(struct power_supply *psy,
 207         enum power_supply_property psp, union power_supply_propval *val)
 208 {
 209         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 210         unsigned int input, v;
 211         int ret;
 212
 213         switch (psp) {
 214         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 215                 ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
 216                 if (ret)
 217                         return ret;
 218
 219                 val->intval = AXP20X_VBUS_VHOLD_uV(v);
 220                 return 0;
 221         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 222                 if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
 223                         ret = iio_read_channel_processed(power->vbus_v,
 224                                                          &val->intval);
 225                         if (ret)
 226                                 return ret;
 227
 228                         /*
 229                          * IIO framework gives mV but Power Supply framework
 230                          * gives uV.
 231                          */
 232                         val->intval *= 1000;
 233                         return 0;
 234                 }
 235
 236                 ret = axp20x_read_variable_width(power->regmap,
 237                                                  AXP20X_VBUS_V_ADC_H, 12);
 238                 if (ret < 0)
 239                         return ret;
 240
 241                 val->intval = ret * 1700; /* 1 step = 1.7 mV */
 242                 return 0;
 243         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 244                 ret = regmap_field_read(power->curr_lim_fld, &v);
 245                 if (ret)
 246                         return ret;
 247
 248                 if (v < power->axp_data->curr_lim_table_size)
 249                         val->intval = power->axp_data->curr_lim_table[v];
 250                 else
 251                         val->intval = power->axp_data->curr_lim_table[
 252                                 power->axp_data->curr_lim_table_size - 1];
 253                 return 0;
 254         case POWER_SUPPLY_PROP_CURRENT_NOW:
 255                 if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
 256                         ret = iio_read_channel_processed(power->vbus_i,
 257                                                          &val->intval);
 258                         if (ret)
 259                                 return ret;
 260
 261                         /*
 262                          * IIO framework gives mA but Power Supply framework
 263                          * gives uA.
 264                          */
 265                         val->intval *= 1000;
 266                         return 0;
 267                 }
 268
 269                 ret = axp20x_read_variable_width(power->regmap,
 270                                                  AXP20X_VBUS_I_ADC_H, 12);
 271                 if (ret < 0)
 272                         return ret;
 273
 274                 val->intval = ret * 375; /* 1 step = 0.375 mA */
 275                 return 0;
 276
 277         case POWER_SUPPLY_PROP_USB_TYPE:
 278                 return axp20x_get_usb_type(power, val);
 279         default:
 280                 break;
 281         }
 282
 283         /* All the properties below need the input-status reg value */
 284         ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &input);
 285         if (ret)
 286                 return ret;
 287
 288         switch (psp) {
 289         case POWER_SUPPLY_PROP_HEALTH:
 290                 if (!(input & AXP20X_PWR_STATUS_VBUS_PRESENT)) {
 291                         val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
 292                         break;
 293                 }
 294
 295                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 296
 297                 if (power->vbus_valid_bit) {
 298                         ret = regmap_field_read(power->vbus_valid_bit, &v);
 299                         if (ret)
 300                                 return ret;
 301
 302                         if (v == 0)
 303                                 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 304                 }
 305
 306                 break;
 307         case POWER_SUPPLY_PROP_PRESENT:
 308                 val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_PRESENT);
 309                 break;
 310         case POWER_SUPPLY_PROP_ONLINE:
 311                 val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_USED);
 312                 break;
 313         default:
 314                 return -EINVAL;
 315         }
 316
 317         return 0;
 318 }
 319
 320 static int axp717_usb_power_get_property(struct power_supply *psy,
 321         enum power_supply_property psp, union power_supply_propval *val)
 322 {
 323         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 324         unsigned int v;
 325         int ret;
 326
 327         switch (psp) {
 328         case POWER_SUPPLY_PROP_HEALTH:
 329                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 330                 ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &v);
 331                 if (ret)
 332                         return ret;
 333
 334                 if (!(v & AXP717_PWR_STATUS_VBUS_GOOD))
 335                         val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
 336
 337                 ret = regmap_read(power->regmap, AXP717_PMU_FAULT_VBUS, &v);
 338                 if (ret)
 339                         return ret;
 340
 341                 v &= (AXP717_PMU_FAULT_VBUS | AXP717_PMU_FAULT_VSYS);
 342                 if (v) {
 343                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 344                         regmap_write(power->regmap, AXP717_PMU_FAULT_VBUS, v);
 345                 }
 346
 347                 break;
 348         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 349                 ret = regmap_read(power->regmap, AXP717_INPUT_CUR_LIMIT_CTRL, &v);
 350                 if (ret)
 351                         return ret;
 352
 353                 /* 50ma step size with 100ma offset. */
 354                 v &= AXP717_INPUT_CUR_LIMIT_MASK;
 355                 val->intval = (v * 50000) + 100000;
 356                 break;
 357         case POWER_SUPPLY_PROP_ONLINE:
 358         case POWER_SUPPLY_PROP_PRESENT:
 359                 ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &v);
 360                 if (ret)
 361                         return ret;
 362                 val->intval = !!(v & AXP717_PWR_STATUS_VBUS_GOOD);
 363                 break;
 364         case POWER_SUPPLY_PROP_USB_TYPE:
 365                 return axp20x_get_usb_type(power, val);
 366         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 367                 ret = regmap_read(power->regmap, AXP717_INPUT_VOL_LIMIT_CTRL, &v);
 368                 if (ret)
 369                         return ret;
 370
 371                 /* 80mv step size with 3.88v offset. */
 372                 v &= AXP717_INPUT_VOL_LIMIT_MASK;
 373                 val->intval = (v * 80000) + 3880000;
 374                 break;
 375         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 376                 if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
 377                         ret = iio_read_channel_processed(power->vbus_v,
 378                                                          &val->intval);
 379                         if (ret)
 380                                 return ret;
 381
 382                         /*
 383                          * IIO framework gives mV but Power Supply framework
 384                          * gives uV.
 385                          */
 386                         val->intval *= 1000;
 387                         return 0;
 388                 }
 389
 390                 ret = axp20x_read_variable_width(power->regmap,
 391                                                  AXP717_VBUS_V_H, 16);
 392                 if (ret < 0)
 393                         return ret;
 394
 395                 val->intval = (ret % AXP717_ADC_DATA_MASK) * 1000;
 396                 break;
 397         default:
 398                 return -EINVAL;
 399         }
 400
 401         return 0;
 402
 403 }
 404
 405 static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
 406                                             int intval)
 407 {
 408         int val;
 409
 410         switch (intval) {
 411         case 4000000:
 412         case 4100000:
 413         case 4200000:
 414         case 4300000:
 415         case 4400000:
 416         case 4500000:
 417         case 4600000:
 418         case 4700000:
 419                 val = (intval - 4000000) / 100000;
 420                 return regmap_update_bits(power->regmap,
 421                                           AXP20X_VBUS_IPSOUT_MGMT,
 422                                           AXP20X_VBUS_VHOLD_MASK,
 423                                           val << AXP20X_VBUS_VHOLD_OFFSET);
 424         default:
 425                 return -EINVAL;
 426         }
 427
 428         return -EINVAL;
 429 }
 430
 431 static int axp717_usb_power_set_voltage_min(struct axp20x_usb_power *power,
 432                                             int intval)
 433 {
 434         int val;
 435
 436         /* Minimum value of 3.88v and maximum of 5.08v. */
 437         if (intval < 3880000 || intval > 5080000)
 438                 return -EINVAL;
 439
 440         /* step size of 80ma with 3.88v offset. */
 441         val = (intval - 3880000) / 80000;
 442         return regmap_update_bits(power->regmap,
 443                                   AXP717_INPUT_VOL_LIMIT_CTRL,
 444                                   AXP717_INPUT_VOL_LIMIT_MASK, val);
 445 }
 446
 447 static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
 448                                                     int intval)
 449 {
 450         int ret;
 451         unsigned int reg;
 452         const unsigned int max = power->axp_data->curr_lim_table_size;
 453
 454         if (intval == -1)
 455                 return -EINVAL;
 456
 457         if (power->max_input_cur && (intval > power->max_input_cur)) {
 458                 dev_warn(power->dev,
 459                          "requested current %d clamped to max current %d\n",
 460                          intval, power->max_input_cur);
 461                 intval = power->max_input_cur;
 462         }
 463
 464         /*
 465          * BC1.2 detection can cause a race condition if we try to set a current
 466          * limit while it's in progress. When it finishes it will overwrite the
 467          * current limit we just set.
 468          */
 469         if (power->usb_bc_en_bit) {
 470                 dev_dbg(power->dev,
 471                         "disabling BC1.2 detection because current limit was set");
 472                 ret = regmap_field_write(power->usb_bc_en_bit, 0);
 473                 if (ret)
 474                         return ret;
 475         }
 476
 477         for (reg = max - 1; reg > 0; reg--)
 478                 if (power->axp_data->curr_lim_table[reg] <= intval)
 479                         break;
 480
 481         dev_dbg(power->dev, "setting input current limit reg to %d (%d uA), requested %d uA",
 482                 reg, power->axp_data->curr_lim_table[reg], intval);
 483
 484         return regmap_field_write(power->curr_lim_fld, reg);
 485 }
 486
 487 static int axp717_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
 488                                                     int intval)
 489 {
 490         int tmp;
 491
 492         /* Minimum value of 100mA and maximum value of 3.25A*/
 493         if (intval < 100000 || intval > 3250000)
 494                 return -EINVAL;
 495
 496         if (power->max_input_cur && (intval > power->max_input_cur)) {
 497                 dev_warn(power->dev,
 498                          "reqested current %d clamped to max current %d\n",
 499                          intval, power->max_input_cur);
 500                 intval = power->max_input_cur;
 501         }
 502
 503         /* Minimum value of 100mA with step size of 50mA. */
 504         tmp = (intval - 100000) / 50000;
 505         return regmap_update_bits(power->regmap,
 506                                   AXP717_INPUT_CUR_LIMIT_CTRL,
 507                                   AXP717_INPUT_CUR_LIMIT_MASK, tmp);
 508 }
 509
 510 static int axp20x_usb_power_set_property(struct power_supply *psy,
 511                                          enum power_supply_property psp,
 512                                          const union power_supply_propval *val)
 513 {
 514         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 515
 516         switch (psp) {
 517         case POWER_SUPPLY_PROP_ONLINE:
 518                 if (!power->vbus_disable_bit)
 519                         return -EINVAL;
 520
 521                 return regmap_field_write(power->vbus_disable_bit, !val->intval);
 522
 523         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 524                 return axp20x_usb_power_set_voltage_min(power, val->intval);
 525
 526         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 527                 return axp20x_usb_power_set_input_current_limit(power, val->intval);
 528
 529         default:
 530                 return -EINVAL;
 531         }
 532 }
 533
 534 static int axp717_usb_power_set_property(struct power_supply *psy,
 535                                          enum power_supply_property psp,
 536                                          const union power_supply_propval *val)
 537 {
 538         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 539
 540         switch (psp) {
 541         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 542                 return axp717_usb_power_set_input_current_limit(power, val->intval);
 543
 544         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 545                 return axp717_usb_power_set_voltage_min(power, val->intval);
 546
 547         default:
 548                 return -EINVAL;
 549         }
 550
 551         return -EINVAL;
 552 }
 553
 554 static int axp20x_usb_power_prop_writeable(struct power_supply *psy,
 555                                            enum power_supply_property psp)
 556 {
 557         struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
 558
 559         /*
 560          * The VBUS path select flag works differently on AXP288 and newer:
 561          *  - On AXP20x and AXP22x, the flag enables VBUS (ignoring N_VBUSEN).
 562          *  - On AXP288 and AXP8xx, the flag disables VBUS (ignoring N_VBUSEN).
 563          * We only expose the control on variants where it can be used to force
 564          * the VBUS input offline.
 565          */
 566         if (psp == POWER_SUPPLY_PROP_ONLINE)
 567                 return power->vbus_disable_bit != NULL;
 568
 569         return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
 570                psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
 571 }
 572
 573 static int axp717_usb_power_prop_writeable(struct power_supply *psy,
 574                                            enum power_supply_property psp)
 575 {
 576         return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
 577                psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
 578 }
 579
 580 static int axp20x_configure_iio_channels(struct platform_device *pdev,
 581                                          struct axp20x_usb_power *power)
 582 {
 583         power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
 584         if (IS_ERR(power->vbus_v)) {
 585                 if (PTR_ERR(power->vbus_v) == -ENODEV)
 586                         return -EPROBE_DEFER;
 587                 return PTR_ERR(power->vbus_v);
 588         }
 589
 590         power->vbus_i = devm_iio_channel_get(&pdev->dev, "vbus_i");
 591         if (IS_ERR(power->vbus_i)) {
 592                 if (PTR_ERR(power->vbus_i) == -ENODEV)
 593                         return -EPROBE_DEFER;
 594                 return PTR_ERR(power->vbus_i);
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int axp717_configure_iio_channels(struct platform_device *pdev,
 601                                          struct axp20x_usb_power *power)
 602 {
 603         power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
 604         if (IS_ERR(power->vbus_v)) {
 605                 if (PTR_ERR(power->vbus_v) == -ENODEV)
 606                         return -EPROBE_DEFER;
 607                 return PTR_ERR(power->vbus_v);
 608         }
 609
 610         return 0;
 611 }
 612
 613 static int axp20x_configure_adc_registers(struct axp20x_usb_power *power)
 614 {
 615         /* Enable vbus voltage and current measurement */
 616         return regmap_update_bits(power->regmap, AXP20X_ADC_EN1,
 617                                   AXP20X_ADC_EN1_VBUS_CURR |
 618                                   AXP20X_ADC_EN1_VBUS_VOLT,
 619                                   AXP20X_ADC_EN1_VBUS_CURR |
 620                                   AXP20X_ADC_EN1_VBUS_VOLT);
 621 }
 622
 623 static int axp717_configure_adc_registers(struct axp20x_usb_power *power)
 624 {
 625         /* Enable vbus voltage measurement  */
 626         return regmap_update_bits(power->regmap, AXP717_ADC_CH_EN_CONTROL,
 627                                   AXP717_ADC_EN_VBUS_VOLT,
 628                                   AXP717_ADC_EN_VBUS_VOLT);
 629 }
 630
 631 static enum power_supply_property axp20x_usb_power_properties[] = {
 632         POWER_SUPPLY_PROP_HEALTH,
 633         POWER_SUPPLY_PROP_PRESENT,
 634         POWER_SUPPLY_PROP_ONLINE,
 635         POWER_SUPPLY_PROP_VOLTAGE_MIN,
 636         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 637         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 638         POWER_SUPPLY_PROP_CURRENT_NOW,
 639 };
 640
 641 static enum power_supply_property axp22x_usb_power_properties[] = {
 642         POWER_SUPPLY_PROP_HEALTH,
 643         POWER_SUPPLY_PROP_PRESENT,
 644         POWER_SUPPLY_PROP_ONLINE,
 645         POWER_SUPPLY_PROP_VOLTAGE_MIN,
 646         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 647 };
 648
 649 static enum power_supply_property axp717_usb_power_properties[] = {
 650         POWER_SUPPLY_PROP_HEALTH,
 651         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 652         POWER_SUPPLY_PROP_ONLINE,
 653         POWER_SUPPLY_PROP_PRESENT,
 654         POWER_SUPPLY_PROP_USB_TYPE,
 655         POWER_SUPPLY_PROP_VOLTAGE_MIN,
 656         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 657 };
 658
 659 static enum power_supply_property axp813_usb_power_properties[] = {
 660         POWER_SUPPLY_PROP_HEALTH,
 661         POWER_SUPPLY_PROP_PRESENT,
 662         POWER_SUPPLY_PROP_ONLINE,
 663         POWER_SUPPLY_PROP_VOLTAGE_MIN,
 664         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 665         POWER_SUPPLY_PROP_USB_TYPE,
 666 };
 667
 668 static const struct power_supply_desc axp20x_usb_power_desc = {
 669         .name = "axp20x-usb",
 670         .type = POWER_SUPPLY_TYPE_USB,
 671         .properties = axp20x_usb_power_properties,
 672         .num_properties = ARRAY_SIZE(axp20x_usb_power_properties),
 673         .property_is_writeable = axp20x_usb_power_prop_writeable,
 674         .get_property = axp20x_usb_power_get_property,
 675         .set_property = axp20x_usb_power_set_property,
 676 };
 677
 678 static const struct power_supply_desc axp22x_usb_power_desc = {
 679         .name = "axp20x-usb",
 680         .type = POWER_SUPPLY_TYPE_USB,
 681         .properties = axp22x_usb_power_properties,
 682         .num_properties = ARRAY_SIZE(axp22x_usb_power_properties),
 683         .property_is_writeable = axp20x_usb_power_prop_writeable,
 684         .get_property = axp20x_usb_power_get_property,
 685         .set_property = axp20x_usb_power_set_property,
 686 };
 687
 688 static const struct power_supply_desc axp717_usb_power_desc = {
 689         .name = "axp20x-usb",
 690         .type = POWER_SUPPLY_TYPE_USB,
 691         .properties = axp717_usb_power_properties,
 692         .num_properties = ARRAY_SIZE(axp717_usb_power_properties),
 693         .property_is_writeable = axp717_usb_power_prop_writeable,
 694         .get_property = axp717_usb_power_get_property,
 695         .set_property = axp717_usb_power_set_property,
 696         .usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
 697                      BIT(POWER_SUPPLY_USB_TYPE_CDP) |
 698                      BIT(POWER_SUPPLY_USB_TYPE_DCP) |
 699                      BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
 700 };
 701
 702 static const struct power_supply_desc axp813_usb_power_desc = {
 703         .name = "axp20x-usb",
 704         .type = POWER_SUPPLY_TYPE_USB,
 705         .properties = axp813_usb_power_properties,
 706         .num_properties = ARRAY_SIZE(axp813_usb_power_properties),
 707         .property_is_writeable = axp20x_usb_power_prop_writeable,
 708         .get_property = axp20x_usb_power_get_property,
 709         .set_property = axp20x_usb_power_set_property,
 710         .usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
 711                      BIT(POWER_SUPPLY_USB_TYPE_CDP) |
 712                      BIT(POWER_SUPPLY_USB_TYPE_DCP) |
 713                      BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
 714 };
 715
 716 static const char * const axp20x_irq_names[] = {
 717         "VBUS_PLUGIN",
 718         "VBUS_REMOVAL",
 719         "VBUS_VALID",
 720         "VBUS_NOT_VALID",
 721 };
 722
 723 static const char * const axp22x_irq_names[] = {
 724         "VBUS_PLUGIN",
 725         "VBUS_REMOVAL",
 726 };
 727
 728 static const char * const axp717_irq_names[] = {
 729         "VBUS_PLUGIN",
 730         "VBUS_REMOVAL",
 731         "VBUS_OVER_V",
 732 };
 733
 734 static int axp192_usb_curr_lim_table[] = {
 735         -1,
 736         -1,
 737         500000,
 738         100000,
 739 };
 740
 741 static int axp20x_usb_curr_lim_table[] = {
 742         900000,
 743         500000,
 744         100000,
 745         -1,
 746 };
 747
 748 static int axp221_usb_curr_lim_table[] = {
 749         900000,
 750         500000,
 751         -1,
 752         -1,
 753 };
 754
 755 static int axp813_usb_curr_lim_table[] = {
 756         100000,
 757         500000,
 758         900000,
 759         1500000,
 760         2000000,
 761         2500000,
 762         3000000,
 763         3500000,
 764         4000000,
 765 };
 766
 767 static const struct axp_data axp192_data = {
 768         .power_desc     = &axp20x_usb_power_desc,
 769         .irq_names      = axp20x_irq_names,
 770         .num_irq_names  = ARRAY_SIZE(axp20x_irq_names),
 771         .curr_lim_table = axp192_usb_curr_lim_table,
 772         .curr_lim_table_size = ARRAY_SIZE(axp192_usb_curr_lim_table),
 773         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 774         .vbus_valid_bit = REG_FIELD(AXP192_USB_OTG_STATUS, 2, 2),
 775         .vbus_mon_bit   = REG_FIELD(AXP20X_VBUS_MON, 3, 3),
 776         .axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
 777         .axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
 778         .axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
 779 };
 780
 781 static const struct axp_data axp202_data = {
 782         .power_desc     = &axp20x_usb_power_desc,
 783         .irq_names      = axp20x_irq_names,
 784         .num_irq_names  = ARRAY_SIZE(axp20x_irq_names),
 785         .curr_lim_table = axp20x_usb_curr_lim_table,
 786         .curr_lim_table_size = ARRAY_SIZE(axp20x_usb_curr_lim_table),
 787         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 788         .vbus_valid_bit = REG_FIELD(AXP20X_USB_OTG_STATUS, 2, 2),
 789         .vbus_mon_bit   = REG_FIELD(AXP20X_VBUS_MON, 3, 3),
 790         .axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
 791         .axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
 792         .axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
 793 };
 794
 795 static const struct axp_data axp221_data = {
 796         .power_desc     = &axp22x_usb_power_desc,
 797         .irq_names      = axp22x_irq_names,
 798         .num_irq_names  = ARRAY_SIZE(axp22x_irq_names),
 799         .curr_lim_table = axp221_usb_curr_lim_table,
 800         .curr_lim_table_size = ARRAY_SIZE(axp221_usb_curr_lim_table),
 801         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 802         .vbus_needs_polling = true,
 803         .axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
 804         .axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
 805         .axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
 806 };
 807
 808 static const struct axp_data axp223_data = {
 809         .power_desc     = &axp22x_usb_power_desc,
 810         .irq_names      = axp22x_irq_names,
 811         .num_irq_names  = ARRAY_SIZE(axp22x_irq_names),
 812         .curr_lim_table = axp20x_usb_curr_lim_table,
 813         .curr_lim_table_size = ARRAY_SIZE(axp20x_usb_curr_lim_table),
 814         .curr_lim_fld   = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1),
 815         .vbus_needs_polling = true,
 816         .axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
 817         .axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
 818         .axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
 819 };
 820
 821 static const struct axp_data axp717_data = {
 822         .power_desc     = &axp717_usb_power_desc,
 823         .irq_names      = axp717_irq_names,
 824         .num_irq_names  = ARRAY_SIZE(axp717_irq_names),
 825         .curr_lim_fld   = REG_FIELD(AXP717_INPUT_CUR_LIMIT_CTRL, 0, 5),
 826         .usb_bc_en_bit  = REG_FIELD(AXP717_MODULE_EN_CONTROL_1, 4, 4),
 827         .usb_bc_det_fld = REG_FIELD(AXP717_BC_DETECT, 5, 7),
 828         .vbus_mon_bit   = REG_FIELD(AXP717_ADC_CH_EN_CONTROL, 2, 2),
 829         .vbus_needs_polling = false,
 830         .axp20x_read_vbus = &axp717_usb_power_poll_vbus,
 831         .axp20x_cfg_iio_chan = axp717_configure_iio_channels,
 832         .axp20x_cfg_adc_reg = axp717_configure_adc_registers,
 833 };
 834
 835 static const struct axp_data axp813_data = {
 836         .power_desc     = &axp813_usb_power_desc,
 837         .irq_names      = axp22x_irq_names,
 838         .num_irq_names  = ARRAY_SIZE(axp22x_irq_names),
 839         .curr_lim_table = axp813_usb_curr_lim_table,
 840         .curr_lim_table_size = ARRAY_SIZE(axp813_usb_curr_lim_table),
 841         .curr_lim_fld   = REG_FIELD(AXP22X_CHRG_CTRL3, 4, 7),
 842         .usb_bc_en_bit  = REG_FIELD(AXP288_BC_GLOBAL, 0, 0),
 843         .usb_bc_det_fld = REG_FIELD(AXP288_BC_DET_STAT, 5, 7),
 844         .vbus_disable_bit = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 7, 7),
 845         .vbus_needs_polling = true,
 846         .axp20x_read_vbus = &axp20x_usb_power_poll_vbus,
 847         .axp20x_cfg_iio_chan = axp20x_configure_iio_channels,
 848         .axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
 849 };
 850
 851 #ifdef CONFIG_PM_SLEEP
 852 static int axp20x_usb_power_suspend(struct device *dev)
 853 {
 854         struct axp20x_usb_power *power = dev_get_drvdata(dev);
 855         int i = 0;
 856
 857         /*
 858          * Allow wake via VBUS_PLUGIN only.
 859          *
 860          * As nested threaded IRQs are not automatically disabled during
 861          * suspend, we must explicitly disable the remainder of the IRQs.
 862          */
 863         if (device_may_wakeup(&power->supply->dev))
 864                 enable_irq_wake(power->irqs[i++]);
 865         while (i < power->num_irqs)
 866                 disable_irq(power->irqs[i++]);
 867
 868         return 0;
 869 }
 870
 871 static int axp20x_usb_power_resume(struct device *dev)
 872 {
 873         struct axp20x_usb_power *power = dev_get_drvdata(dev);
 874         int i = 0;
 875
 876         if (device_may_wakeup(&power->supply->dev))
 877                 disable_irq_wake(power->irqs[i++]);
 878         while (i < power->num_irqs)
 879                 enable_irq(power->irqs[i++]);
 880
 881         mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
 882
 883         return 0;
 884 }
 885 #endif
 886
 887 static SIMPLE_DEV_PM_OPS(axp20x_usb_power_pm_ops, axp20x_usb_power_suspend,
 888                                                   axp20x_usb_power_resume);
 889
 890 static int axp20x_regmap_field_alloc_optional(struct device *dev,
 891                                               struct regmap *regmap,
 892                                               struct reg_field fdesc,
 893                                               struct regmap_field **fieldp)
 894 {
 895         struct regmap_field *field;
 896
 897         if (fdesc.reg == 0) {
 898                 *fieldp = NULL;
 899                 return 0;
 900         }
 901
 902         field = devm_regmap_field_alloc(dev, regmap, fdesc);
 903         if (IS_ERR(field))
 904                 return PTR_ERR(field);
 905
 906         *fieldp = field;
 907         return 0;
 908 }
 909
 910 /* Optionally allow users to specify a maximum charging current. */
 911 static void axp20x_usb_power_parse_dt(struct device *dev,
 912                                       struct axp20x_usb_power *power)
 913 {
 914         int ret;
 915
 916         ret = device_property_read_u32(dev, "input-current-limit-microamp",
 917                                        &power->max_input_cur);
 918         if (ret)
 919                 dev_dbg(dev, "%s() no input-current-limit specified\n", __func__);
 920 }
 921
 922 static int axp20x_usb_power_probe(struct platform_device *pdev)
 923 {
 924         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 925         struct power_supply_config psy_cfg = {};
 926         struct axp20x_usb_power *power;
 927         const struct axp_data *axp_data;
 928         int i, irq, ret;
 929
 930         if (!of_device_is_available(pdev->dev.of_node))
 931                 return -ENODEV;
 932
 933         if (!axp20x) {
 934                 dev_err(&pdev->dev, "Parent drvdata not set\n");
 935                 return -EINVAL;
 936         }
 937
 938         axp_data = of_device_get_match_data(&pdev->dev);
 939
 940         power = devm_kzalloc(&pdev->dev,
 941                              struct_size(power, irqs, axp_data->num_irq_names),
 942                              GFP_KERNEL);
 943         if (!power)
 944                 return -ENOMEM;
 945
 946         platform_set_drvdata(pdev, power);
 947
 948         power->dev = &pdev->dev;
 949         power->axp_data = axp_data;
 950         power->regmap = axp20x->regmap;
 951         power->num_irqs = axp_data->num_irq_names;
 952
 953         power->curr_lim_fld = devm_regmap_field_alloc(&pdev->dev, power->regmap,
 954                                                       axp_data->curr_lim_fld);
 955         if (IS_ERR(power->curr_lim_fld))
 956                 return PTR_ERR(power->curr_lim_fld);
 957
 958         axp20x_usb_power_parse_dt(&pdev->dev, power);
 959
 960         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 961                                                  axp_data->vbus_valid_bit,
 962                                                  &power->vbus_valid_bit);
 963         if (ret)
 964                 return ret;
 965
 966         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 967                                                  axp_data->vbus_mon_bit,
 968                                                  &power->vbus_mon_bit);
 969         if (ret)
 970                 return ret;
 971
 972         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 973                                                  axp_data->usb_bc_en_bit,
 974                                                  &power->usb_bc_en_bit);
 975         if (ret)
 976                 return ret;
 977
 978         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 979                                                  axp_data->usb_bc_det_fld,
 980                                                  &power->usb_bc_det_fld);
 981         if (ret)
 982                 return ret;
 983
 984         ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap,
 985                                                  axp_data->vbus_disable_bit,
 986                                                  &power->vbus_disable_bit);
 987         if (ret)
 988                 return ret;
 989
 990         ret = devm_delayed_work_autocancel(&pdev->dev, &power->vbus_detect,
 991                                            axp_data->axp20x_read_vbus);
 992         if (ret)
 993                 return ret;
 994
 995         if (power->vbus_mon_bit) {
 996                 /* Enable vbus valid checking */
 997                 ret = regmap_field_write(power->vbus_mon_bit, 1);
 998                 if (ret)
 999                         return ret;
1000
1001                 if (IS_ENABLED(CONFIG_AXP20X_ADC))
1002                         ret = axp_data->axp20x_cfg_iio_chan(pdev, power);
1003                 else
1004                         ret = axp_data->axp20x_cfg_adc_reg(power);
1005
1006                 if (ret)
1007                         return ret;
1008         }
1009
1010         if (power->usb_bc_en_bit) {
1011                 /* Enable USB Battery Charging specification detection */
1012                 ret = regmap_field_write(power->usb_bc_en_bit, 1);
1013                 if (ret)
1014                         return ret;
1015         }
1016
1017         psy_cfg.of_node = pdev->dev.of_node;
1018         psy_cfg.drv_data = power;
1019
1020         power->supply = devm_power_supply_register(&pdev->dev,
1021                                                    axp_data->power_desc,
1022                                                    &psy_cfg);
1023         if (IS_ERR(power->supply))
1024                 return PTR_ERR(power->supply);
1025
1026         /* Request irqs after registering, as irqs may trigger immediately */
1027         for (i = 0; i < axp_data->num_irq_names; i++) {
1028                 irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
1029                 if (irq < 0)
1030                         return irq;
1031
1032                 power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
1033                 ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
1034                                                    axp20x_usb_power_irq, 0,
1035                                                    DRVNAME, power);
1036                 if (ret < 0) {
1037                         dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
1038                                 axp_data->irq_names[i], ret);
1039                         return ret;
1040                 }
1041         }
1042
1043         if (axp20x_usb_vbus_needs_polling(power))
1044                 queue_delayed_work(system_power_efficient_wq, &power->vbus_detect, 0);
1045
1046         return 0;
1047 }
1048
1049 static const struct of_device_id axp20x_usb_power_match[] = {
1050         {
1051                 .compatible = "x-powers,axp192-usb-power-supply",
1052                 .data = &axp192_data,
1053         }, {
1054                 .compatible = "x-powers,axp202-usb-power-supply",
1055                 .data = &axp202_data,
1056         }, {
1057                 .compatible = "x-powers,axp221-usb-power-supply",
1058                 .data = &axp221_data,
1059         }, {
1060                 .compatible = "x-powers,axp223-usb-power-supply",
1061                 .data = &axp223_data,
1062         }, {
1063                 .compatible = "x-powers,axp717-usb-power-supply",
1064                 .data = &axp717_data,
1065         }, {
1066                 .compatible = "x-powers,axp813-usb-power-supply",
1067                 .data = &axp813_data,
1068         }, { /* sentinel */ }
1069 };
1070 MODULE_DEVICE_TABLE(of, axp20x_usb_power_match);
1071
1072 static struct platform_driver axp20x_usb_power_driver = {
1073         .probe = axp20x_usb_power_probe,
1074         .driver = {
1075                 .name           = DRVNAME,
1076                 .of_match_table = axp20x_usb_power_match,
1077                 .pm             = &axp20x_usb_power_pm_ops,
1078         },
1079 };
1080
1081 module_platform_driver(axp20x_usb_power_driver);
1082
1083 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
1084 MODULE_DESCRIPTION("AXP20x PMIC USB power supply status driver");
1085 MODULE_LICENSE("GPL");