drivers/power/supply/pm2301_charger.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2012 ST Ericsson.
   4  *
   5  * Power supply driver for ST Ericsson pm2xxx_charger charger
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/module.h>
  10 #include <linux/device.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/delay.h>
  13 #include <linux/slab.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/power_supply.h>
  16 #include <linux/regulator/consumer.h>
  17 #include <linux/err.h>
  18 #include <linux/i2c.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/mfd/abx500/ab8500.h>
  21 #include <linux/mfd/abx500/ab8500-bm.h>
  22 #include <linux/mfd/abx500/ux500_chargalg.h>
  23 #include <linux/pm2301_charger.h>
  24 #include <linux/gpio.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/pm.h>
  27
  28 #include "pm2301_charger.h"
  29
  30 #define to_pm2xxx_charger_ac_device_info(x) container_of((x), \
  31                 struct pm2xxx_charger, ac_chg)
  32 #define SLEEP_MIN               50
  33 #define SLEEP_MAX               100
  34 #define PM2XXX_AUTOSUSPEND_DELAY 500
  35
  36 static int pm2xxx_interrupt_registers[] = {
  37         PM2XXX_REG_INT1,
  38         PM2XXX_REG_INT2,
  39         PM2XXX_REG_INT3,
  40         PM2XXX_REG_INT4,
  41         PM2XXX_REG_INT5,
  42         PM2XXX_REG_INT6,
  43 };
  44
  45 static enum power_supply_property pm2xxx_charger_ac_props[] = {
  46         POWER_SUPPLY_PROP_HEALTH,
  47         POWER_SUPPLY_PROP_PRESENT,
  48         POWER_SUPPLY_PROP_ONLINE,
  49         POWER_SUPPLY_PROP_VOLTAGE_AVG,
  50 };
  51
  52 static int pm2xxx_charger_voltage_map[] = {
  53         3500,
  54         3525,
  55         3550,
  56         3575,
  57         3600,
  58         3625,
  59         3650,
  60         3675,
  61         3700,
  62         3725,
  63         3750,
  64         3775,
  65         3800,
  66         3825,
  67         3850,
  68         3875,
  69         3900,
  70         3925,
  71         3950,
  72         3975,
  73         4000,
  74         4025,
  75         4050,
  76         4075,
  77         4100,
  78         4125,
  79         4150,
  80         4175,
  81         4200,
  82         4225,
  83         4250,
  84         4275,
  85         4300,
  86 };
  87
  88 static int pm2xxx_charger_current_map[] = {
  89         200,
  90         200,
  91         400,
  92         600,
  93         800,
  94         1000,
  95         1200,
  96         1400,
  97         1600,
  98         1800,
  99         2000,
 100         2200,
 101         2400,
 102         2600,
 103         2800,
 104         3000,
 105 };
 106
 107 static void set_lpn_pin(struct pm2xxx_charger *pm2)
 108 {
 109         if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin)) {
 110                 gpio_set_value(pm2->lpn_pin, 1);
 111                 usleep_range(SLEEP_MIN, SLEEP_MAX);
 112         }
 113 }
 114
 115 static void clear_lpn_pin(struct pm2xxx_charger *pm2)
 116 {
 117         if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin))
 118                 gpio_set_value(pm2->lpn_pin, 0);
 119 }
 120
 121 static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val)
 122 {
 123         int ret;
 124
 125         /* wake up the device */
 126         pm_runtime_get_sync(pm2->dev);
 127
 128         ret = i2c_smbus_read_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
 129                                 1, val);
 130         if (ret < 0)
 131                 dev_err(pm2->dev, "Error reading register at 0x%x\n", reg);
 132         else
 133                 ret = 0;
 134
 135         pm_runtime_put_sync(pm2->dev);
 136
 137         return ret;
 138 }
 139
 140 static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val)
 141 {
 142         int ret;
 143
 144         /* wake up the device */
 145         pm_runtime_get_sync(pm2->dev);
 146
 147         ret = i2c_smbus_write_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
 148                                 1, &val);
 149         if (ret < 0)
 150                 dev_err(pm2->dev, "Error writing register at 0x%x\n", reg);
 151         else
 152                 ret = 0;
 153
 154         pm_runtime_put_sync(pm2->dev);
 155
 156         return ret;
 157 }
 158
 159 static int pm2xxx_charging_enable_mngt(struct pm2xxx_charger *pm2)
 160 {
 161         int ret;
 162
 163         /* Enable charging */
 164         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
 165                         (PM2XXX_CH_AUTO_RESUME_EN | PM2XXX_CHARGER_ENA));
 166
 167         return ret;
 168 }
 169
 170 static int pm2xxx_charging_disable_mngt(struct pm2xxx_charger *pm2)
 171 {
 172         int ret;
 173
 174         /* Disable SW EOC ctrl */
 175         ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_HW);
 176         if (ret < 0) {
 177                 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
 178                 return ret;
 179         }
 180
 181         /* Disable charging */
 182         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
 183                         (PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS));
 184         if (ret < 0) {
 185                 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
 186                 return ret;
 187         }
 188
 189         return 0;
 190 }
 191
 192 static int pm2xxx_charger_batt_therm_mngt(struct pm2xxx_charger *pm2, int val)
 193 {
 194         queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work);
 195
 196         return 0;
 197 }
 198
 199
 200 static int pm2xxx_charger_die_therm_mngt(struct pm2xxx_charger *pm2, int val)
 201 {
 202         queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work);
 203
 204         return 0;
 205 }
 206
 207 static int pm2xxx_charger_ovv_mngt(struct pm2xxx_charger *pm2, int val)
 208 {
 209         dev_err(pm2->dev, "Overvoltage detected\n");
 210         pm2->flags.ovv = true;
 211         power_supply_changed(pm2->ac_chg.psy);
 212
 213         /* Schedule a new HW failure check */
 214         queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0);
 215
 216         return 0;
 217 }
 218
 219 static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val)
 220 {
 221         dev_dbg(pm2->dev , "20 minutes watchdog expired\n");
 222
 223         pm2->ac.wd_expired = true;
 224         power_supply_changed(pm2->ac_chg.psy);
 225
 226         return 0;
 227 }
 228
 229 static int pm2xxx_charger_vbat_lsig_mngt(struct pm2xxx_charger *pm2, int val)
 230 {
 231         int ret;
 232
 233         switch (val) {
 234         case PM2XXX_INT1_ITVBATLOWR:
 235                 dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n");
 236                 /* Enable SW EOC ctrl */
 237                 ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG,
 238                                                         PM2XXX_SWCTRL_SW);
 239                 if (ret < 0) {
 240                         dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
 241                         return ret;
 242                 }
 243                 break;
 244
 245         case PM2XXX_INT1_ITVBATLOWF:
 246                 dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n");
 247                 /* Disable SW EOC ctrl */
 248                 ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG,
 249                                                         PM2XXX_SWCTRL_HW);
 250                 if (ret < 0) {
 251                         dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
 252                         return ret;
 253                 }
 254                 break;
 255
 256         default:
 257                 dev_err(pm2->dev, "Unknown VBAT level\n");
 258         }
 259
 260         return 0;
 261 }
 262
 263 static int pm2xxx_charger_bat_disc_mngt(struct pm2xxx_charger *pm2, int val)
 264 {
 265         dev_dbg(pm2->dev, "battery disconnected\n");
 266
 267         return 0;
 268 }
 269
 270 static int pm2xxx_charger_detection(struct pm2xxx_charger *pm2, u8 *val)
 271 {
 272         int ret;
 273
 274         ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT2, val);
 275
 276         if (ret < 0) {
 277                 dev_err(pm2->dev, "Charger detection failed\n");
 278                 goto out;
 279         }
 280
 281         *val &= (PM2XXX_INT2_S_ITVPWR1PLUG | PM2XXX_INT2_S_ITVPWR2PLUG);
 282
 283 out:
 284         return ret;
 285 }
 286
 287 static int pm2xxx_charger_itv_pwr_plug_mngt(struct pm2xxx_charger *pm2, int val)
 288 {
 289
 290         int ret;
 291         u8 read_val;
 292
 293         /*
 294          * Since we can't be sure that the events are received
 295          * synchronously, we have the check if the main charger is
 296          * connected by reading the interrupt source register.
 297          */
 298         ret = pm2xxx_charger_detection(pm2, &read_val);
 299
 300         if ((ret == 0) && read_val) {
 301                 pm2->ac.charger_connected = 1;
 302                 pm2->ac_conn = true;
 303                 queue_work(pm2->charger_wq, &pm2->ac_work);
 304         }
 305
 306
 307         return ret;
 308 }
 309
 310 static int pm2xxx_charger_itv_pwr_unplug_mngt(struct pm2xxx_charger *pm2,
 311                                                                 int val)
 312 {
 313         pm2->ac.charger_connected = 0;
 314         queue_work(pm2->charger_wq, &pm2->ac_work);
 315
 316         return 0;
 317 }
 318
 319 static int pm2_int_reg0(void *pm2_data, int val)
 320 {
 321         struct pm2xxx_charger *pm2 = pm2_data;
 322         int ret = 0;
 323
 324         if (val & PM2XXX_INT1_ITVBATLOWR) {
 325                 ret = pm2xxx_charger_vbat_lsig_mngt(pm2,
 326                                                 PM2XXX_INT1_ITVBATLOWR);
 327                 if (ret < 0)
 328                         goto out;
 329         }
 330
 331         if (val & PM2XXX_INT1_ITVBATLOWF) {
 332                 ret = pm2xxx_charger_vbat_lsig_mngt(pm2,
 333                                                 PM2XXX_INT1_ITVBATLOWF);
 334                 if (ret < 0)
 335                         goto out;
 336         }
 337
 338         if (val & PM2XXX_INT1_ITVBATDISCONNECT) {
 339                 ret = pm2xxx_charger_bat_disc_mngt(pm2,
 340                                 PM2XXX_INT1_ITVBATDISCONNECT);
 341                 if (ret < 0)
 342                         goto out;
 343         }
 344 out:
 345         return ret;
 346 }
 347
 348 static int pm2_int_reg1(void *pm2_data, int val)
 349 {
 350         struct pm2xxx_charger *pm2 = pm2_data;
 351         int ret = 0;
 352
 353         if (val & (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)) {
 354                 dev_dbg(pm2->dev , "Main charger plugged\n");
 355                 ret = pm2xxx_charger_itv_pwr_plug_mngt(pm2, val &
 356                         (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG));
 357         }
 358
 359         if (val &
 360                 (PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)) {
 361                 dev_dbg(pm2->dev , "Main charger unplugged\n");
 362                 ret = pm2xxx_charger_itv_pwr_unplug_mngt(pm2, val &
 363                                                 (PM2XXX_INT2_ITVPWR1UNPLUG |
 364                                                 PM2XXX_INT2_ITVPWR2UNPLUG));
 365         }
 366
 367         return ret;
 368 }
 369
 370 static int pm2_int_reg2(void *pm2_data, int val)
 371 {
 372         struct pm2xxx_charger *pm2 = pm2_data;
 373         int ret = 0;
 374
 375         if (val & PM2XXX_INT3_ITAUTOTIMEOUTWD)
 376                 ret = pm2xxx_charger_wd_exp_mngt(pm2, val);
 377
 378         if (val & (PM2XXX_INT3_ITCHPRECHARGEWD |
 379                                 PM2XXX_INT3_ITCHCCWD | PM2XXX_INT3_ITCHCVWD)) {
 380                 dev_dbg(pm2->dev,
 381                         "Watchdog occurred for precharge, CC and CV charge\n");
 382         }
 383
 384         return ret;
 385 }
 386
 387 static int pm2_int_reg3(void *pm2_data, int val)
 388 {
 389         struct pm2xxx_charger *pm2 = pm2_data;
 390         int ret = 0;
 391
 392         if (val & (PM2XXX_INT4_ITCHARGINGON)) {
 393                 dev_dbg(pm2->dev ,
 394                         "charging operation has started\n");
 395         }
 396
 397         if (val & (PM2XXX_INT4_ITVRESUME)) {
 398                 dev_dbg(pm2->dev,
 399                         "battery discharged down to VResume threshold\n");
 400         }
 401
 402         if (val & (PM2XXX_INT4_ITBATTFULL)) {
 403                 dev_dbg(pm2->dev , "battery fully detected\n");
 404         }
 405
 406         if (val & (PM2XXX_INT4_ITCVPHASE)) {
 407                 dev_dbg(pm2->dev, "CV phase enter with 0.5C charging\n");
 408         }
 409
 410         if (val & (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)) {
 411                 pm2->failure_case = VPWR_OVV;
 412                 ret = pm2xxx_charger_ovv_mngt(pm2, val &
 413                         (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV));
 414                 dev_dbg(pm2->dev, "VPWR/VSYSTEM overvoltage detected\n");
 415         }
 416
 417         if (val & (PM2XXX_INT4_S_ITBATTEMPCOLD |
 418                                 PM2XXX_INT4_S_ITBATTEMPHOT)) {
 419                 ret = pm2xxx_charger_batt_therm_mngt(pm2, val &
 420                         (PM2XXX_INT4_S_ITBATTEMPCOLD |
 421                         PM2XXX_INT4_S_ITBATTEMPHOT));
 422                 dev_dbg(pm2->dev, "BTEMP is too Low/High\n");
 423         }
 424
 425         return ret;
 426 }
 427
 428 static int pm2_int_reg4(void *pm2_data, int val)
 429 {
 430         struct pm2xxx_charger *pm2 = pm2_data;
 431         int ret = 0;
 432
 433         if (val & PM2XXX_INT5_ITVSYSTEMOVV) {
 434                 pm2->failure_case = VSYSTEM_OVV;
 435                 ret = pm2xxx_charger_ovv_mngt(pm2, val &
 436                                                 PM2XXX_INT5_ITVSYSTEMOVV);
 437                 dev_dbg(pm2->dev, "VSYSTEM overvoltage detected\n");
 438         }
 439
 440         if (val & (PM2XXX_INT5_ITTHERMALWARNINGFALL |
 441                                 PM2XXX_INT5_ITTHERMALWARNINGRISE |
 442                                 PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
 443                                 PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)) {
 444                 dev_dbg(pm2->dev, "BTEMP die temperature is too Low/High\n");
 445                 ret = pm2xxx_charger_die_therm_mngt(pm2, val &
 446                         (PM2XXX_INT5_ITTHERMALWARNINGFALL |
 447                         PM2XXX_INT5_ITTHERMALWARNINGRISE |
 448                         PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
 449                         PM2XXX_INT5_ITTHERMALSHUTDOWNRISE));
 450         }
 451
 452         return ret;
 453 }
 454
 455 static int pm2_int_reg5(void *pm2_data, int val)
 456 {
 457         struct pm2xxx_charger *pm2 = pm2_data;
 458
 459         if (val & (PM2XXX_INT6_ITVPWR2DROP | PM2XXX_INT6_ITVPWR1DROP)) {
 460                 dev_dbg(pm2->dev, "VMPWR drop to VBAT level\n");
 461         }
 462
 463         if (val & (PM2XXX_INT6_ITVPWR2VALIDRISE |
 464                         PM2XXX_INT6_ITVPWR1VALIDRISE |
 465                         PM2XXX_INT6_ITVPWR2VALIDFALL |
 466                         PM2XXX_INT6_ITVPWR1VALIDFALL)) {
 467                 dev_dbg(pm2->dev, "Falling/Rising edge on WPWR1/2\n");
 468         }
 469
 470         return 0;
 471 }
 472
 473 static irqreturn_t  pm2xxx_irq_int(int irq, void *data)
 474 {
 475         struct pm2xxx_charger *pm2 = data;
 476         struct pm2xxx_interrupts *interrupt = pm2->pm2_int;
 477         int i;
 478
 479         /* wake up the device */
 480         pm_runtime_get_sync(pm2->dev);
 481
 482         do {
 483                 for (i = 0; i < PM2XXX_NUM_INT_REG; i++) {
 484                         pm2xxx_reg_read(pm2,
 485                                 pm2xxx_interrupt_registers[i],
 486                                 &(interrupt->reg[i]));
 487
 488                         if (interrupt->reg[i] > 0)
 489                                 interrupt->handler[i](pm2, interrupt->reg[i]);
 490                 }
 491         } while (gpio_get_value(pm2->pdata->gpio_irq_number) == 0);
 492
 493         pm_runtime_mark_last_busy(pm2->dev);
 494         pm_runtime_put_autosuspend(pm2->dev);
 495
 496         return IRQ_HANDLED;
 497 }
 498
 499 static int pm2xxx_charger_get_ac_cv(struct pm2xxx_charger *pm2)
 500 {
 501         int ret = 0;
 502         u8 val;
 503
 504         if (pm2->ac.charger_connected && pm2->ac.charger_online) {
 505
 506                 ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &val);
 507                 if (ret < 0) {
 508                         dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
 509                         goto out;
 510                 }
 511
 512                 if (val & PM2XXX_INT4_S_ITCVPHASE)
 513                         ret = PM2XXX_CONST_VOLT;
 514                 else
 515                         ret = PM2XXX_CONST_CURR;
 516         }
 517 out:
 518         return ret;
 519 }
 520
 521 static int pm2xxx_current_to_regval(int curr)
 522 {
 523         int i;
 524
 525         if (curr < pm2xxx_charger_current_map[0])
 526                 return 0;
 527
 528         for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_current_map); i++) {
 529                 if (curr < pm2xxx_charger_current_map[i])
 530                         return (i - 1);
 531         }
 532
 533         i = ARRAY_SIZE(pm2xxx_charger_current_map) - 1;
 534         if (curr == pm2xxx_charger_current_map[i])
 535                 return i;
 536         else
 537                 return -EINVAL;
 538 }
 539
 540 static int pm2xxx_voltage_to_regval(int curr)
 541 {
 542         int i;
 543
 544         if (curr < pm2xxx_charger_voltage_map[0])
 545                 return 0;
 546
 547         for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_voltage_map); i++) {
 548                 if (curr < pm2xxx_charger_voltage_map[i])
 549                         return i - 1;
 550         }
 551
 552         i = ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1;
 553         if (curr == pm2xxx_charger_voltage_map[i])
 554                 return i;
 555         else
 556                 return -EINVAL;
 557 }
 558
 559 static int pm2xxx_charger_update_charger_current(struct ux500_charger *charger,
 560                 int ich_out)
 561 {
 562         int ret;
 563         int curr_index;
 564         struct pm2xxx_charger *pm2;
 565         u8 val;
 566
 567         if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
 568                 pm2 = to_pm2xxx_charger_ac_device_info(charger);
 569         else
 570                 return -ENXIO;
 571
 572         curr_index = pm2xxx_current_to_regval(ich_out);
 573         if (curr_index < 0) {
 574                 dev_err(pm2->dev,
 575                         "Charger current too high, charging not started\n");
 576                 return -ENXIO;
 577         }
 578
 579         ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
 580         if (ret >= 0) {
 581                 val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK;
 582                 val |= curr_index;
 583                 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val);
 584                 if (ret < 0) {
 585                         dev_err(pm2->dev,
 586                                 "%s write failed\n", __func__);
 587                 }
 588         }
 589         else
 590                 dev_err(pm2->dev, "%s read failed\n", __func__);
 591
 592         return ret;
 593 }
 594
 595 static int pm2xxx_charger_ac_get_property(struct power_supply *psy,
 596         enum power_supply_property psp,
 597         union power_supply_propval *val)
 598 {
 599         struct pm2xxx_charger *pm2;
 600
 601         pm2 = to_pm2xxx_charger_ac_device_info(psy_to_ux500_charger(psy));
 602
 603         switch (psp) {
 604         case POWER_SUPPLY_PROP_HEALTH:
 605                 if (pm2->flags.mainextchnotok)
 606                         val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 607                 else if (pm2->ac.wd_expired)
 608                         val->intval = POWER_SUPPLY_HEALTH_DEAD;
 609                 else if (pm2->flags.main_thermal_prot)
 610                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 611                 else if (pm2->flags.ovv)
 612                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 613                 else
 614                         val->intval = POWER_SUPPLY_HEALTH_GOOD;
 615                 break;
 616         case POWER_SUPPLY_PROP_ONLINE:
 617                 val->intval = pm2->ac.charger_online;
 618                 break;
 619         case POWER_SUPPLY_PROP_PRESENT:
 620                 val->intval = pm2->ac.charger_connected;
 621                 break;
 622         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 623                 pm2->ac.cv_active = pm2xxx_charger_get_ac_cv(pm2);
 624                 val->intval = pm2->ac.cv_active;
 625                 break;
 626         default:
 627                 return -EINVAL;
 628         }
 629         return 0;
 630 }
 631
 632 static int pm2xxx_charging_init(struct pm2xxx_charger *pm2)
 633 {
 634         int ret = 0;
 635
 636         /* enable CC and CV watchdog */
 637         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG3,
 638                 (PM2XXX_CH_WD_CV_PHASE_60MIN | PM2XXX_CH_WD_CC_PHASE_60MIN));
 639         if( ret < 0)
 640                 return ret;
 641
 642         /* enable precharge watchdog */
 643         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG4,
 644                                         PM2XXX_CH_WD_PRECH_PHASE_60MIN);
 645
 646         /* Disable auto timeout */
 647         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG5,
 648                                         PM2XXX_CH_WD_AUTO_TIMEOUT_20MIN);
 649
 650         /*
 651      * EOC current level = 100mA
 652          * Precharge current level = 100mA
 653          * CC current level = 1000mA
 654          */
 655         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6,
 656                 (PM2XXX_DIR_CH_CC_CURRENT_1000MA |
 657                 PM2XXX_CH_PRECH_CURRENT_100MA |
 658                 PM2XXX_CH_EOC_CURRENT_100MA));
 659
 660         /*
 661      * recharge threshold = 3.8V
 662          * Precharge to CC threshold = 2.9V
 663          */
 664         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG7,
 665                 (PM2XXX_CH_PRECH_VOL_2_9 | PM2XXX_CH_VRESUME_VOL_3_8));
 666
 667         /* float voltage charger level = 4.2V */
 668         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8,
 669                 PM2XXX_CH_VOLT_4_2);
 670
 671         /* Voltage drop between VBAT and VSYS in HW charging = 300mV */
 672         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG9,
 673                 (PM2XXX_CH_150MV_DROP_300MV | PM2XXX_CHARCHING_INFO_DIS |
 674                 PM2XXX_CH_CC_REDUCED_CURRENT_IDENT |
 675                 PM2XXX_CH_CC_MODEDROP_DIS));
 676
 677         /* Input charger level of over voltage = 10V */
 678         ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR2,
 679                                         PM2XXX_VPWR2_OVV_10);
 680         ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR1,
 681                                         PM2XXX_VPWR1_OVV_10);
 682
 683         /* Input charger drop */
 684         ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR2,
 685                 (PM2XXX_VPWR2_HW_OPT_DIS | PM2XXX_VPWR2_VALID_DIS |
 686                 PM2XXX_VPWR2_DROP_DIS));
 687         ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR1,
 688                 (PM2XXX_VPWR1_HW_OPT_DIS | PM2XXX_VPWR1_VALID_DIS |
 689                 PM2XXX_VPWR1_DROP_DIS));
 690
 691         /* Disable battery low monitoring */
 692         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_LOW_LEV_COMP_REG,
 693                 PM2XXX_VBAT_LOW_MONITORING_ENA);
 694
 695         return ret;
 696 }
 697
 698 static int pm2xxx_charger_ac_en(struct ux500_charger *charger,
 699         int enable, int vset, int iset)
 700 {
 701         int ret;
 702         int volt_index;
 703         int curr_index;
 704         u8 val;
 705
 706         struct pm2xxx_charger *pm2 = to_pm2xxx_charger_ac_device_info(charger);
 707
 708         if (enable) {
 709                 if (!pm2->ac.charger_connected) {
 710                         dev_dbg(pm2->dev, "AC charger not connected\n");
 711                         return -ENXIO;
 712                 }
 713
 714                 dev_dbg(pm2->dev, "Enable AC: %dmV %dmA\n", vset, iset);
 715                 if (!pm2->vddadc_en_ac) {
 716                         ret = regulator_enable(pm2->regu);
 717                         if (ret)
 718                                 dev_warn(pm2->dev,
 719                                         "Failed to enable vddadc regulator\n");
 720                         else
 721                                 pm2->vddadc_en_ac = true;
 722                 }
 723
 724                 ret = pm2xxx_charging_init(pm2);
 725                 if (ret < 0) {
 726                         dev_err(pm2->dev, "%s charging init failed\n",
 727                                         __func__);
 728                         goto error_occured;
 729                 }
 730
 731                 volt_index = pm2xxx_voltage_to_regval(vset);
 732                 curr_index = pm2xxx_current_to_regval(iset);
 733
 734                 if (volt_index < 0 || curr_index < 0) {
 735                         dev_err(pm2->dev,
 736                                 "Charger voltage or current too high, "
 737                                 "charging not started\n");
 738                         return -ENXIO;
 739                 }
 740
 741                 ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG8, &val);
 742                 if (ret < 0) {
 743                         dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
 744                         goto error_occured;
 745                 }
 746                 val &= ~PM2XXX_CH_VOLT_MASK;
 747                 val |= volt_index;
 748                 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, val);
 749                 if (ret < 0) {
 750                         dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
 751                         goto error_occured;
 752                 }
 753
 754                 ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
 755                 if (ret < 0) {
 756                         dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
 757                         goto error_occured;
 758                 }
 759                 val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK;
 760                 val |= curr_index;
 761                 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val);
 762                 if (ret < 0) {
 763                         dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
 764                         goto error_occured;
 765                 }
 766
 767                 if (!pm2->bat->enable_overshoot) {
 768                         ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val);
 769                         if (ret < 0) {
 770                                 dev_err(pm2->dev, "%s pm2xxx read failed\n",
 771                                                                 __func__);
 772                                 goto error_occured;
 773                         }
 774                         val |= PM2XXX_ANTI_OVERSHOOT_EN;
 775                         ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, val);
 776                         if (ret < 0) {
 777                                 dev_err(pm2->dev, "%s pm2xxx write failed\n",
 778                                                                 __func__);
 779                                 goto error_occured;
 780                         }
 781                 }
 782
 783                 ret = pm2xxx_charging_enable_mngt(pm2);
 784                 if (ret < 0) {
 785                         dev_err(pm2->dev, "Failed to enable"
 786                                                 "pm2xxx ac charger\n");
 787                         goto error_occured;
 788                 }
 789
 790                 pm2->ac.charger_online = 1;
 791         } else {
 792                 pm2->ac.charger_online = 0;
 793                 pm2->ac.wd_expired = false;
 794
 795                 /* Disable regulator if enabled */
 796                 if (pm2->vddadc_en_ac) {
 797                         regulator_disable(pm2->regu);
 798                         pm2->vddadc_en_ac = false;
 799                 }
 800
 801                 ret = pm2xxx_charging_disable_mngt(pm2);
 802                 if (ret < 0) {
 803                         dev_err(pm2->dev, "failed to disable"
 804                                                 "pm2xxx ac charger\n");
 805                         goto error_occured;
 806                 }
 807
 808                 dev_dbg(pm2->dev, "PM2301: " "Disabled AC charging\n");
 809         }
 810         power_supply_changed(pm2->ac_chg.psy);
 811
 812 error_occured:
 813         return ret;
 814 }
 815
 816 static int pm2xxx_charger_watchdog_kick(struct ux500_charger *charger)
 817 {
 818         int ret;
 819         struct pm2xxx_charger *pm2;
 820
 821         if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
 822                 pm2 = to_pm2xxx_charger_ac_device_info(charger);
 823         else
 824                 return -ENXIO;
 825
 826         ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_WD_KICK, WD_TIMER);
 827         if (ret)
 828                 dev_err(pm2->dev, "Failed to kick WD!\n");
 829
 830         return ret;
 831 }
 832
 833 static void pm2xxx_charger_ac_work(struct work_struct *work)
 834 {
 835         struct pm2xxx_charger *pm2 = container_of(work,
 836                 struct pm2xxx_charger, ac_work);
 837
 838
 839         power_supply_changed(pm2->ac_chg.psy);
 840         sysfs_notify(&pm2->ac_chg.psy->dev.kobj, NULL, "present");
 841 };
 842
 843 static void pm2xxx_charger_check_hw_failure_work(struct work_struct *work)
 844 {
 845         u8 reg_value;
 846
 847         struct pm2xxx_charger *pm2 = container_of(work,
 848                 struct pm2xxx_charger, check_hw_failure_work.work);
 849
 850         if (pm2->flags.ovv) {
 851                 pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &reg_value);
 852
 853                 if (!(reg_value & (PM2XXX_INT4_S_ITVPWR1OVV |
 854                                         PM2XXX_INT4_S_ITVPWR2OVV))) {
 855                         pm2->flags.ovv = false;
 856                         power_supply_changed(pm2->ac_chg.psy);
 857                 }
 858         }
 859
 860         /* If we still have a failure, schedule a new check */
 861         if (pm2->flags.ovv) {
 862                 queue_delayed_work(pm2->charger_wq,
 863                         &pm2->check_hw_failure_work, round_jiffies(HZ));
 864         }
 865 }
 866
 867 static void pm2xxx_charger_check_main_thermal_prot_work(
 868         struct work_struct *work)
 869 {
 870         int ret;
 871         u8 val;
 872
 873         struct pm2xxx_charger *pm2 = container_of(work, struct pm2xxx_charger,
 874                                         check_main_thermal_prot_work);
 875
 876         /* Check if die temp warning is still active */
 877         ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT5, &val);
 878         if (ret < 0) {
 879                 dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
 880                 return;
 881         }
 882         if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGRISE
 883                         | PM2XXX_INT5_S_ITTHERMALSHUTDOWNRISE))
 884                 pm2->flags.main_thermal_prot = true;
 885         else if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGFALL
 886                                 | PM2XXX_INT5_S_ITTHERMALSHUTDOWNFALL))
 887                 pm2->flags.main_thermal_prot = false;
 888
 889         power_supply_changed(pm2->ac_chg.psy);
 890 }
 891
 892 static struct pm2xxx_interrupts pm2xxx_int = {
 893         .handler[0] = pm2_int_reg0,
 894         .handler[1] = pm2_int_reg1,
 895         .handler[2] = pm2_int_reg2,
 896         .handler[3] = pm2_int_reg3,
 897         .handler[4] = pm2_int_reg4,
 898         .handler[5] = pm2_int_reg5,
 899 };
 900
 901 static struct pm2xxx_irq pm2xxx_charger_irq[] = {
 902         {"PM2XXX_IRQ_INT", pm2xxx_irq_int},
 903 };
 904
 905 static int __maybe_unused pm2xxx_wall_charger_resume(struct device *dev)
 906 {
 907         struct i2c_client *i2c_client = to_i2c_client(dev);
 908         struct pm2xxx_charger *pm2;
 909
 910         pm2 =  (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client);
 911         set_lpn_pin(pm2);
 912
 913         /* If we still have a HW failure, schedule a new check */
 914         if (pm2->flags.ovv)
 915                 queue_delayed_work(pm2->charger_wq,
 916                                 &pm2->check_hw_failure_work, 0);
 917
 918         return 0;
 919 }
 920
 921 static int __maybe_unused pm2xxx_wall_charger_suspend(struct device *dev)
 922 {
 923         struct i2c_client *i2c_client = to_i2c_client(dev);
 924         struct pm2xxx_charger *pm2;
 925
 926         pm2 =  (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client);
 927         clear_lpn_pin(pm2);
 928
 929         /* Cancel any pending HW failure check */
 930         if (delayed_work_pending(&pm2->check_hw_failure_work))
 931                 cancel_delayed_work(&pm2->check_hw_failure_work);
 932
 933         flush_work(&pm2->ac_work);
 934         flush_work(&pm2->check_main_thermal_prot_work);
 935
 936         return 0;
 937 }
 938
 939 static int __maybe_unused pm2xxx_runtime_suspend(struct device *dev)
 940 {
 941         struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
 942         struct pm2xxx_charger *pm2;
 943
 944         pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
 945         clear_lpn_pin(pm2);
 946
 947         return 0;
 948 }
 949
 950 static int __maybe_unused pm2xxx_runtime_resume(struct device *dev)
 951 {
 952         struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
 953         struct pm2xxx_charger *pm2;
 954
 955         pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
 956
 957         if (gpio_is_valid(pm2->lpn_pin) && gpio_get_value(pm2->lpn_pin) == 0)
 958                 set_lpn_pin(pm2);
 959
 960         return 0;
 961 }
 962
 963 static const struct dev_pm_ops pm2xxx_pm_ops __maybe_unused = {
 964         SET_SYSTEM_SLEEP_PM_OPS(pm2xxx_wall_charger_suspend,
 965                 pm2xxx_wall_charger_resume)
 966         SET_RUNTIME_PM_OPS(pm2xxx_runtime_suspend, pm2xxx_runtime_resume, NULL)
 967 };
 968
 969 static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
 970                 const struct i2c_device_id *id)
 971 {
 972         struct pm2xxx_platform_data *pl_data = i2c_client->dev.platform_data;
 973         struct power_supply_config psy_cfg = {};
 974         struct pm2xxx_charger *pm2;
 975         int ret = 0;
 976         u8 val;
 977         int i;
 978
 979         if (!pl_data) {
 980                 dev_err(&i2c_client->dev, "No platform data supplied\n");
 981                 return -EINVAL;
 982         }
 983
 984         pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL);
 985         if (!pm2) {
 986                 dev_err(&i2c_client->dev, "pm2xxx_charger allocation failed\n");
 987                 return -ENOMEM;
 988         }
 989
 990         /* get parent data */
 991         pm2->dev = &i2c_client->dev;
 992
 993         pm2->pm2_int = &pm2xxx_int;
 994
 995         /* get charger spcific platform data */
 996         if (!pl_data->wall_charger) {
 997                 dev_err(pm2->dev, "no charger platform data supplied\n");
 998                 ret = -EINVAL;
 999                 goto free_device_info;
1000         }
1001
1002         pm2->pdata = pl_data->wall_charger;
1003
1004         /* get battery specific platform data */
1005         if (!pl_data->battery) {
1006                 dev_err(pm2->dev, "no battery platform data supplied\n");
1007                 ret = -EINVAL;
1008                 goto free_device_info;
1009         }
1010
1011         pm2->bat = pl_data->battery;
1012
1013         if (!i2c_check_functionality(i2c_client->adapter,
1014                         I2C_FUNC_SMBUS_BYTE_DATA |
1015                         I2C_FUNC_SMBUS_READ_WORD_DATA)) {
1016                 ret = -ENODEV;
1017                 dev_info(pm2->dev, "pm2301 i2c_check_functionality failed\n");
1018                 goto free_device_info;
1019         }
1020
1021         pm2->config.pm2xxx_i2c = i2c_client;
1022         pm2->config.pm2xxx_id = (struct i2c_device_id *) id;
1023         i2c_set_clientdata(i2c_client, pm2);
1024
1025         /* AC supply */
1026         /* power_supply base class */
1027         pm2->ac_chg_desc.name = pm2->pdata->label;
1028         pm2->ac_chg_desc.type = POWER_SUPPLY_TYPE_MAINS;
1029         pm2->ac_chg_desc.properties = pm2xxx_charger_ac_props;
1030         pm2->ac_chg_desc.num_properties = ARRAY_SIZE(pm2xxx_charger_ac_props);
1031         pm2->ac_chg_desc.get_property = pm2xxx_charger_ac_get_property;
1032
1033         psy_cfg.supplied_to = pm2->pdata->supplied_to;
1034         psy_cfg.num_supplicants = pm2->pdata->num_supplicants;
1035         /* pm2xxx_charger sub-class */
1036         pm2->ac_chg.ops.enable = &pm2xxx_charger_ac_en;
1037         pm2->ac_chg.ops.kick_wd = &pm2xxx_charger_watchdog_kick;
1038         pm2->ac_chg.ops.update_curr = &pm2xxx_charger_update_charger_current;
1039         pm2->ac_chg.max_out_volt = pm2xxx_charger_voltage_map[
1040                 ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1];
1041         pm2->ac_chg.max_out_curr = pm2xxx_charger_current_map[
1042                 ARRAY_SIZE(pm2xxx_charger_current_map) - 1];
1043         pm2->ac_chg.wdt_refresh = WD_KICK_INTERVAL;
1044         pm2->ac_chg.enabled = true;
1045         pm2->ac_chg.external = true;
1046
1047         /* Create a work queue for the charger */
1048         pm2->charger_wq = alloc_ordered_workqueue("pm2xxx_charger_wq",
1049                                                   WQ_MEM_RECLAIM);
1050         if (pm2->charger_wq == NULL) {
1051                 ret = -ENOMEM;
1052                 dev_err(pm2->dev, "failed to create work queue\n");
1053                 goto free_device_info;
1054         }
1055
1056         /* Init work for charger detection */
1057         INIT_WORK(&pm2->ac_work, pm2xxx_charger_ac_work);
1058
1059         /* Init work for checking HW status */
1060         INIT_WORK(&pm2->check_main_thermal_prot_work,
1061                 pm2xxx_charger_check_main_thermal_prot_work);
1062
1063         /* Init work for HW failure check */
1064         INIT_DEFERRABLE_WORK(&pm2->check_hw_failure_work,
1065                 pm2xxx_charger_check_hw_failure_work);
1066
1067         /*
1068          * VDD ADC supply needs to be enabled from this driver when there
1069          * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
1070          * interrupts during charging
1071          */
1072         pm2->regu = regulator_get(pm2->dev, "vddadc");
1073         if (IS_ERR(pm2->regu)) {
1074                 ret = PTR_ERR(pm2->regu);
1075                 dev_err(pm2->dev, "failed to get vddadc regulator\n");
1076                 goto free_charger_wq;
1077         }
1078
1079         /* Register AC charger class */
1080         pm2->ac_chg.psy = power_supply_register(pm2->dev, &pm2->ac_chg_desc,
1081                                                 &psy_cfg);
1082         if (IS_ERR(pm2->ac_chg.psy)) {
1083                 dev_err(pm2->dev, "failed to register AC charger\n");
1084                 ret = PTR_ERR(pm2->ac_chg.psy);
1085                 goto free_regulator;
1086         }
1087
1088         /* Register interrupts */
1089         ret = request_threaded_irq(gpio_to_irq(pm2->pdata->gpio_irq_number),
1090                                 NULL,
1091                                 pm2xxx_charger_irq[0].isr,
1092                                 pm2->pdata->irq_type,
1093                                 pm2xxx_charger_irq[0].name, pm2);
1094
1095         if (ret != 0) {
1096                 dev_err(pm2->dev, "failed to request %s IRQ %d: %d\n",
1097                 pm2xxx_charger_irq[0].name,
1098                         gpio_to_irq(pm2->pdata->gpio_irq_number), ret);
1099                 goto unregister_pm2xxx_charger;
1100         }
1101
1102         ret = pm_runtime_set_active(pm2->dev);
1103         if (ret)
1104                 dev_err(pm2->dev, "set active Error\n");
1105
1106         pm_runtime_enable(pm2->dev);
1107         pm_runtime_set_autosuspend_delay(pm2->dev, PM2XXX_AUTOSUSPEND_DELAY);
1108         pm_runtime_use_autosuspend(pm2->dev);
1109         pm_runtime_resume(pm2->dev);
1110
1111         /* pm interrupt can wake up system */
1112         ret = enable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
1113         if (ret) {
1114                 dev_err(pm2->dev, "failed to set irq wake\n");
1115                 goto unregister_pm2xxx_interrupt;
1116         }
1117
1118         mutex_init(&pm2->lock);
1119
1120         if (gpio_is_valid(pm2->pdata->lpn_gpio)) {
1121                 /* get lpn GPIO from platform data */
1122                 pm2->lpn_pin = pm2->pdata->lpn_gpio;
1123
1124                 /*
1125                  * Charger detection mechanism requires pulling up the LPN pin
1126                  * while i2c communication if Charger is not connected
1127                  * LPN pin of PM2301 is GPIO60 of AB9540
1128                  */
1129                 ret = gpio_request(pm2->lpn_pin, "pm2301_lpm_gpio");
1130
1131                 if (ret < 0) {
1132                         dev_err(pm2->dev, "pm2301_lpm_gpio request failed\n");
1133                         goto disable_pm2_irq_wake;
1134                 }
1135                 ret = gpio_direction_output(pm2->lpn_pin, 0);
1136                 if (ret < 0) {
1137                         dev_err(pm2->dev, "pm2301_lpm_gpio direction failed\n");
1138                         goto free_gpio;
1139                 }
1140                 set_lpn_pin(pm2);
1141         }
1142
1143         /* read  interrupt registers */
1144         for (i = 0; i < PM2XXX_NUM_INT_REG; i++)
1145                 pm2xxx_reg_read(pm2,
1146                         pm2xxx_interrupt_registers[i],
1147                         &val);
1148
1149         ret = pm2xxx_charger_detection(pm2, &val);
1150
1151         if ((ret == 0) && val) {
1152                 pm2->ac.charger_connected = 1;
1153                 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1154                                              AB8500_MAIN_CH_DET);
1155                 pm2->ac_conn = true;
1156                 power_supply_changed(pm2->ac_chg.psy);
1157                 sysfs_notify(&pm2->ac_chg.psy->dev.kobj, NULL, "present");
1158         }
1159
1160         return 0;
1161
1162 free_gpio:
1163         if (gpio_is_valid(pm2->lpn_pin))
1164                 gpio_free(pm2->lpn_pin);
1165 disable_pm2_irq_wake:
1166         disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
1167 unregister_pm2xxx_interrupt:
1168         /* disable interrupt */
1169         free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2);
1170 unregister_pm2xxx_charger:
1171         /* unregister power supply */
1172         power_supply_unregister(pm2->ac_chg.psy);
1173 free_regulator:
1174         /* disable the regulator */
1175         regulator_put(pm2->regu);
1176 free_charger_wq:
1177         destroy_workqueue(pm2->charger_wq);
1178 free_device_info:
1179         kfree(pm2);
1180
1181         return ret;
1182 }
1183
1184 static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client)
1185 {
1186         struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client);
1187
1188         /* Disable pm_runtime */
1189         pm_runtime_disable(pm2->dev);
1190         /* Disable AC charging */
1191         pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0);
1192
1193         /* Disable wake by pm interrupt */
1194         disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
1195
1196         /* Disable interrupts */
1197         free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2);
1198
1199         /* Delete the work queue */
1200         destroy_workqueue(pm2->charger_wq);
1201
1202         flush_scheduled_work();
1203
1204         /* disable the regulator */
1205         regulator_put(pm2->regu);
1206
1207         power_supply_unregister(pm2->ac_chg.psy);
1208
1209         if (gpio_is_valid(pm2->lpn_pin))
1210                 gpio_free(pm2->lpn_pin);
1211
1212         kfree(pm2);
1213
1214         return 0;
1215 }
1216
1217 static const struct i2c_device_id pm2xxx_id[] = {
1218         { "pm2301", 0 },
1219         { }
1220 };
1221
1222 MODULE_DEVICE_TABLE(i2c, pm2xxx_id);
1223
1224 static struct i2c_driver pm2xxx_charger_driver = {
1225         .probe = pm2xxx_wall_charger_probe,
1226         .remove = pm2xxx_wall_charger_remove,
1227         .driver = {
1228                 .name = "pm2xxx-wall_charger",
1229                 .pm = IS_ENABLED(CONFIG_PM) ? &pm2xxx_pm_ops : NULL,
1230         },
1231         .id_table = pm2xxx_id,
1232 };
1233
1234 static int __init pm2xxx_charger_init(void)
1235 {
1236         return i2c_add_driver(&pm2xxx_charger_driver);
1237 }
1238
1239 static void __exit pm2xxx_charger_exit(void)
1240 {
1241         i2c_del_driver(&pm2xxx_charger_driver);
1242 }
1243
1244 device_initcall_sync(pm2xxx_charger_init);
1245 module_exit(pm2xxx_charger_exit);
1246
1247 MODULE_LICENSE("GPL v2");
1248 MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay");
1249 MODULE_DESCRIPTION("PM2xxx charger management driver");