drivers/power/88pm860x_charger.c

   1 /*
   2  * Battery driver for Marvell 88PM860x PMIC
   3  *
   4  * Copyright (c) 2012 Marvell International Ltd.
   5  * Author:      Jett Zhou <jtzhou@marvell.com>
   6  *              Haojian Zhuang <haojian.zhuang@marvell.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/slab.h>
  17 #include <linux/power_supply.h>
  18 #include <linux/mfd/88pm860x.h>
  19 #include <linux/delay.h>
  20 #include <linux/uaccess.h>
  21 #include <asm/div64.h>
  22
  23 /* bit definitions of Status Query Interface 2 */
  24 #define STATUS2_CHG             (1 << 2)
  25
  26 /* bit definitions of Reset Out Register */
  27 #define RESET_SW_PD             (1 << 7)
  28
  29 /* bit definitions of PreReg 1 */
  30 #define PREREG1_90MA            (0x0)
  31 #define PREREG1_180MA           (0x1)
  32 #define PREREG1_450MA           (0x4)
  33 #define PREREG1_540MA           (0x5)
  34 #define PREREG1_1350MA          (0xE)
  35 #define PREREG1_VSYS_4_5V       (3 << 4)
  36
  37 /* bit definitions of Charger Control 1 Register */
  38 #define CC1_MODE_OFF            (0)
  39 #define CC1_MODE_PRECHARGE      (1)
  40 #define CC1_MODE_FASTCHARGE     (2)
  41 #define CC1_MODE_PULSECHARGE    (3)
  42 #define CC1_ITERM_20MA          (0 << 2)
  43 #define CC1_ITERM_60MA          (2 << 2)
  44 #define CC1_VFCHG_4_2V          (9 << 4)
  45
  46 /* bit definitions of Charger Control 2 Register */
  47 #define CC2_ICHG_100MA          (0x1)
  48 #define CC2_ICHG_500MA          (0x9)
  49 #define CC2_ICHG_1000MA         (0x13)
  50
  51 /* bit definitions of Charger Control 3 Register */
  52 #define CC3_180MIN_TIMEOUT      (0x6 << 4)
  53 #define CC3_270MIN_TIMEOUT      (0x7 << 4)
  54 #define CC3_360MIN_TIMEOUT      (0xA << 4)
  55 #define CC3_DISABLE_TIMEOUT     (0xF << 4)
  56
  57 /* bit definitions of Charger Control 4 Register */
  58 #define CC4_IPRE_40MA           (7)
  59 #define CC4_VPCHG_3_2V          (3 << 4)
  60 #define CC4_IFCHG_MON_EN        (1 << 6)
  61 #define CC4_BTEMP_MON_EN        (1 << 7)
  62
  63 /* bit definitions of Charger Control 6 Register */
  64 #define CC6_BAT_OV_EN           (1 << 2)
  65 #define CC6_BAT_UV_EN           (1 << 3)
  66 #define CC6_UV_VBAT_SET         (0x3 << 6)      /* 2.8v */
  67
  68 /* bit definitions of Charger Control 7 Register */
  69 #define CC7_BAT_REM_EN          (1 << 3)
  70 #define CC7_IFSM_EN             (1 << 7)
  71
  72 /* bit definitions of Measurement Enable 1 Register */
  73 #define MEAS1_VBAT              (1 << 0)
  74
  75 /* bit definitions of Measurement Enable 3 Register */
  76 #define MEAS3_IBAT_EN           (1 << 0)
  77 #define MEAS3_CC_EN             (1 << 2)
  78
  79 #define FSM_INIT                0
  80 #define FSM_DISCHARGE           1
  81 #define FSM_PRECHARGE           2
  82 #define FSM_FASTCHARGE          3
  83
  84 #define PRECHARGE_THRESHOLD     3100
  85 #define POWEROFF_THRESHOLD      3400
  86 #define CHARGE_THRESHOLD        4000
  87 #define DISCHARGE_THRESHOLD     4180
  88
  89 /* over-temperature on PM8606 setting */
  90 #define OVER_TEMP_FLAG          (1 << 6)
  91 #define OVTEMP_AUTORECOVER      (1 << 3)
  92
  93 /* over-voltage protect on vchg setting mv */
  94 #define VCHG_NORMAL_LOW         4200
  95 #define VCHG_NORMAL_CHECK       5800
  96 #define VCHG_NORMAL_HIGH        6000
  97 #define VCHG_OVP_LOW            5500
  98
  99 struct pm860x_charger_info {
 100         struct pm860x_chip *chip;
 101         struct i2c_client *i2c;
 102         struct i2c_client *i2c_8606;
 103         struct device *dev;
 104
 105         struct power_supply usb;
 106         struct mutex lock;
 107         int irq_nums;
 108         int irq[7];
 109         unsigned state:3;       /* fsm state */
 110         unsigned online:1;      /* usb charger */
 111         unsigned present:1;     /* battery present */
 112         unsigned allowed:1;
 113 };
 114
 115 static char *pm860x_supplied_to[] = {
 116         "battery-monitor",
 117 };
 118
 119 static int measure_vchg(struct pm860x_charger_info *info, int *data)
 120 {
 121         unsigned char buf[2];
 122         int ret = 0;
 123
 124         ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
 125         if (ret < 0)
 126                 return ret;
 127
 128         *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
 129         /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
 130         *data = ((*data & 0xfff) * 9 * 125) >> 9;
 131
 132         dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
 133
 134         return ret;
 135 }
 136
 137 static void set_vchg_threshold(struct pm860x_charger_info *info,
 138                                int min, int max)
 139 {
 140         int data;
 141
 142         /* (tmp << 8) * / 5 / 1800 */
 143         if (min <= 0)
 144                 data = 0;
 145         else
 146                 data = (min << 5) / 1125;
 147         pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
 148         dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
 149
 150         if (max <= 0)
 151                 data = 0xff;
 152         else
 153                 data = (max << 5) / 1125;
 154         pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
 155         dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
 156
 157 }
 158
 159 static void set_vbatt_threshold(struct pm860x_charger_info *info,
 160                                 int min, int max)
 161 {
 162         int data;
 163
 164         /* (tmp << 8) * 3 / 1800 */
 165         if (min <= 0)
 166                 data = 0;
 167         else
 168                 data = (min << 5) / 675;
 169         pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
 170         dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
 171
 172         if (max <= 0)
 173                 data = 0xff;
 174         else
 175                 data = (max << 5) / 675;
 176         pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
 177         dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
 178
 179         return;
 180 }
 181
 182 static int start_precharge(struct pm860x_charger_info *info)
 183 {
 184         int ret;
 185
 186         dev_dbg(info->dev, "Start Pre-charging!\n");
 187         set_vbatt_threshold(info, 0, 0);
 188
 189         ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
 190                                PREREG1_1350MA | PREREG1_VSYS_4_5V);
 191         if (ret < 0)
 192                 goto out;
 193         /* stop charging */
 194         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
 195                               CC1_MODE_OFF);
 196         if (ret < 0)
 197                 goto out;
 198         /* set 270 minutes timeout */
 199         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
 200                               CC3_270MIN_TIMEOUT);
 201         if (ret < 0)
 202                 goto out;
 203         /* set precharge current, termination voltage, IBAT & TBAT monitor */
 204         ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
 205                                CC4_IPRE_40MA | CC4_VPCHG_3_2V |
 206                                CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
 207         if (ret < 0)
 208                 goto out;
 209         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
 210                               CC7_BAT_REM_EN | CC7_IFSM_EN,
 211                               CC7_BAT_REM_EN | CC7_IFSM_EN);
 212         if (ret < 0)
 213                 goto out;
 214         /* trigger precharge */
 215         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
 216                               CC1_MODE_PRECHARGE);
 217 out:
 218         return ret;
 219 }
 220
 221 static int start_fastcharge(struct pm860x_charger_info *info)
 222 {
 223         int ret;
 224
 225         dev_dbg(info->dev, "Start Fast-charging!\n");
 226
 227         /* set fastcharge termination current & voltage, disable charging */
 228         ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
 229                                CC1_MODE_OFF | CC1_ITERM_60MA |
 230                                CC1_VFCHG_4_2V);
 231         if (ret < 0)
 232                 goto out;
 233         ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
 234                                PREREG1_540MA | PREREG1_VSYS_4_5V);
 235         if (ret < 0)
 236                 goto out;
 237         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
 238                               CC2_ICHG_500MA);
 239         if (ret < 0)
 240                 goto out;
 241         /* set 270 minutes timeout */
 242         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
 243                               CC3_270MIN_TIMEOUT);
 244         if (ret < 0)
 245                 goto out;
 246         /* set IBAT & TBAT monitor */
 247         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
 248                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
 249                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
 250         if (ret < 0)
 251                 goto out;
 252         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
 253                               CC6_BAT_OV_EN | CC6_BAT_UV_EN |
 254                               CC6_UV_VBAT_SET,
 255                               CC6_BAT_OV_EN | CC6_BAT_UV_EN |
 256                               CC6_UV_VBAT_SET);
 257         if (ret < 0)
 258                 goto out;
 259         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
 260                               CC7_BAT_REM_EN | CC7_IFSM_EN,
 261                               CC7_BAT_REM_EN | CC7_IFSM_EN);
 262         if (ret < 0)
 263                 goto out;
 264         /* launch fast-charge */
 265         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
 266                               CC1_MODE_FASTCHARGE);
 267         /* vchg threshold setting */
 268         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
 269 out:
 270         return ret;
 271 }
 272
 273 static void stop_charge(struct pm860x_charger_info *info, int vbatt)
 274 {
 275         dev_dbg(info->dev, "Stop charging!\n");
 276         pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
 277         if (vbatt > CHARGE_THRESHOLD && info->online)
 278                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
 279 }
 280
 281 static void power_off_notification(struct pm860x_charger_info *info)
 282 {
 283         dev_dbg(info->dev, "Power-off notification!\n");
 284 }
 285
 286 static int set_charging_fsm(struct pm860x_charger_info *info)
 287 {
 288         struct power_supply *psy;
 289         union power_supply_propval data;
 290         unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
 291                 "fastcharge",
 292         };
 293         int ret;
 294         int vbatt;
 295
 296         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 297         if (!psy)
 298                 return -EINVAL;
 299         ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &data);
 300         if (ret)
 301                 return ret;
 302         vbatt = data.intval / 1000;
 303
 304         ret = psy->get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
 305         if (ret)
 306                 return ret;
 307
 308         mutex_lock(&info->lock);
 309         info->present = data.intval;
 310
 311         dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
 312                 "Allowed:%d\n",
 313                 &fsm_state[info->state][0],
 314                 (info->online) ? "online" : "N/A",
 315                 (info->present) ? "present" : "N/A", info->allowed);
 316         dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
 317
 318         switch (info->state) {
 319         case FSM_INIT:
 320                 if (info->online && info->present && info->allowed) {
 321                         if (vbatt < PRECHARGE_THRESHOLD) {
 322                                 info->state = FSM_PRECHARGE;
 323                                 start_precharge(info);
 324                         } else if (vbatt > DISCHARGE_THRESHOLD) {
 325                                 info->state = FSM_DISCHARGE;
 326                                 stop_charge(info, vbatt);
 327                         } else if (vbatt < DISCHARGE_THRESHOLD) {
 328                                 info->state = FSM_FASTCHARGE;
 329                                 start_fastcharge(info);
 330                         }
 331                 } else {
 332                         if (vbatt < POWEROFF_THRESHOLD) {
 333                                 power_off_notification(info);
 334                         } else {
 335                                 info->state = FSM_DISCHARGE;
 336                                 stop_charge(info, vbatt);
 337                         }
 338                 }
 339                 break;
 340         case FSM_PRECHARGE:
 341                 if (info->online && info->present && info->allowed) {
 342                         if (vbatt > PRECHARGE_THRESHOLD) {
 343                                 info->state = FSM_FASTCHARGE;
 344                                 start_fastcharge(info);
 345                         }
 346                 } else {
 347                         info->state = FSM_DISCHARGE;
 348                         stop_charge(info, vbatt);
 349                 }
 350                 break;
 351         case FSM_FASTCHARGE:
 352                 if (info->online && info->present && info->allowed) {
 353                         if (vbatt < PRECHARGE_THRESHOLD) {
 354                                 info->state = FSM_PRECHARGE;
 355                                 start_precharge(info);
 356                         }
 357                 } else {
 358                         info->state = FSM_DISCHARGE;
 359                         stop_charge(info, vbatt);
 360                 }
 361                 break;
 362         case FSM_DISCHARGE:
 363                 if (info->online && info->present && info->allowed) {
 364                         if (vbatt < PRECHARGE_THRESHOLD) {
 365                                 info->state = FSM_PRECHARGE;
 366                                 start_precharge(info);
 367                         } else if (vbatt < DISCHARGE_THRESHOLD) {
 368                                 info->state = FSM_FASTCHARGE;
 369                                 start_fastcharge(info);
 370                         }
 371                 } else {
 372                         if (vbatt < POWEROFF_THRESHOLD)
 373                                 power_off_notification(info);
 374                         else if (vbatt > CHARGE_THRESHOLD && info->online)
 375                                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
 376                 }
 377                 break;
 378         default:
 379                 dev_warn(info->dev, "FSM meets wrong state:%d\n",
 380                          info->state);
 381                 break;
 382         }
 383         dev_dbg(info->dev,
 384                 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
 385                 &fsm_state[info->state][0],
 386                 (info->online) ? "online" : "N/A",
 387                 (info->present) ? "present" : "N/A", info->allowed);
 388         mutex_unlock(&info->lock);
 389
 390         return 0;
 391 }
 392
 393 static irqreturn_t pm860x_charger_handler(int irq, void *data)
 394 {
 395         struct pm860x_charger_info *info = data;
 396         int ret;
 397
 398         mutex_lock(&info->lock);
 399         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 400         if (ret < 0) {
 401                 mutex_unlock(&info->lock);
 402                 goto out;
 403         }
 404         if (ret & STATUS2_CHG) {
 405                 info->online = 1;
 406                 info->allowed = 1;
 407         } else {
 408                 info->online = 0;
 409                 info->allowed = 0;
 410         }
 411         mutex_unlock(&info->lock);
 412         dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
 413                 (info->online) ? "online" : "N/A", info->allowed);
 414
 415         set_charging_fsm(info);
 416
 417         power_supply_changed(&info->usb);
 418 out:
 419         return IRQ_HANDLED;
 420 }
 421
 422 static irqreturn_t pm860x_temp_handler(int irq, void *data)
 423 {
 424         struct power_supply *psy;
 425         struct pm860x_charger_info *info = data;
 426         union power_supply_propval temp;
 427         int value;
 428         int ret;
 429
 430         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 431         if (!psy)
 432                 goto out;
 433         ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
 434         if (ret)
 435                 goto out;
 436         value = temp.intval / 10;
 437
 438         mutex_lock(&info->lock);
 439         /* Temperature < -10 C or >40 C, Will not allow charge */
 440         if (value < -10 || value > 40)
 441                 info->allowed = 0;
 442         else
 443                 info->allowed = 1;
 444         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 445         mutex_unlock(&info->lock);
 446
 447         set_charging_fsm(info);
 448 out:
 449         return IRQ_HANDLED;
 450 }
 451
 452 static irqreturn_t pm860x_exception_handler(int irq, void *data)
 453 {
 454         struct pm860x_charger_info *info = data;
 455
 456         mutex_lock(&info->lock);
 457         info->allowed = 0;
 458         mutex_unlock(&info->lock);
 459         dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
 460
 461         set_charging_fsm(info);
 462         return IRQ_HANDLED;
 463 }
 464
 465 static irqreturn_t pm860x_done_handler(int irq, void *data)
 466 {
 467         struct pm860x_charger_info *info = data;
 468         struct power_supply *psy;
 469         union power_supply_propval val;
 470         int ret;
 471         int vbatt;
 472
 473         mutex_lock(&info->lock);
 474         /* pre-charge done, will transimit to fast-charge stage */
 475         if (info->state == FSM_PRECHARGE) {
 476                 info->allowed = 1;
 477                 goto out;
 478         }
 479         /*
 480          * Fast charge done, delay to read
 481          * the correct status of CHG_DET.
 482          */
 483         mdelay(5);
 484         info->allowed = 0;
 485         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 486         if (!psy)
 487                 goto out;
 488         ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
 489         if (ret)
 490                 goto out;
 491         vbatt = val.intval / 1000;
 492         /*
 493          * CHG_DONE interrupt is faster than CHG_DET interrupt when
 494          * plug in/out usb, So we can not rely on info->online, we
 495          * need check pm8607 status register to check usb is online
 496          * or not, then we can decide it is real charge done
 497          * automatically or it is triggered by usb plug out;
 498          */
 499         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 500         if (ret < 0)
 501                 goto out;
 502         if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
 503                 psy->set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL, &val);
 504
 505 out:
 506         mutex_unlock(&info->lock);
 507         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 508         set_charging_fsm(info);
 509
 510         return IRQ_HANDLED;
 511 }
 512
 513 static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
 514 {
 515         struct pm860x_charger_info *info = data;
 516
 517         mutex_lock(&info->lock);
 518
 519         set_vbatt_threshold(info, 0, 0);
 520
 521         if (info->present && info->online)
 522                 info->allowed = 1;
 523         else
 524                 info->allowed = 0;
 525         mutex_unlock(&info->lock);
 526         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 527
 528         set_charging_fsm(info);
 529
 530         return IRQ_HANDLED;
 531 }
 532
 533 static irqreturn_t pm860x_vchg_handler(int irq, void *data)
 534 {
 535         struct pm860x_charger_info *info = data;
 536         int vchg = 0;
 537
 538         if (info->present)
 539                 goto out;
 540
 541         measure_vchg(info, &vchg);
 542
 543         mutex_lock(&info->lock);
 544         if (!info->online) {
 545                 int status;
 546                 /* check if over-temp on pm8606 or not */
 547                 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
 548                 if (status & OVER_TEMP_FLAG) {
 549                         /* clear over temp flag and set auto recover */
 550                         pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
 551                                         OVER_TEMP_FLAG, OVER_TEMP_FLAG);
 552                         pm860x_set_bits(info->i2c_8606,
 553                                         PM8606_VSYS,
 554                                         OVTEMP_AUTORECOVER,
 555                                         OVTEMP_AUTORECOVER);
 556                         dev_dbg(info->dev,
 557                                 "%s, pm8606 over-temp occurred\n", __func__);
 558                 }
 559         }
 560
 561         if (vchg > VCHG_NORMAL_CHECK) {
 562                 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
 563                 info->allowed = 0;
 564                 dev_dbg(info->dev,
 565                         "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
 566                         __func__, vchg);
 567         } else if (vchg < VCHG_OVP_LOW) {
 568                 set_vchg_threshold(info, VCHG_NORMAL_LOW,
 569                                    VCHG_NORMAL_HIGH);
 570                 info->allowed = 1;
 571                 dev_dbg(info->dev,
 572                         "%s,pm8607 over-vchg recover,vchg = %dmv\n",
 573                         __func__, vchg);
 574         }
 575         mutex_unlock(&info->lock);
 576
 577         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 578         set_charging_fsm(info);
 579 out:
 580         return IRQ_HANDLED;
 581 }
 582
 583 static int pm860x_usb_get_prop(struct power_supply *psy,
 584                                enum power_supply_property psp,
 585                                union power_supply_propval *val)
 586 {
 587         struct pm860x_charger_info *info =
 588             dev_get_drvdata(psy->dev->parent);
 589
 590         switch (psp) {
 591         case POWER_SUPPLY_PROP_STATUS:
 592                 if (info->state == FSM_FASTCHARGE ||
 593                                 info->state == FSM_PRECHARGE)
 594                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 595                 else
 596                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 597                 break;
 598         case POWER_SUPPLY_PROP_ONLINE:
 599                 val->intval = info->online;
 600                 break;
 601         default:
 602                 return -ENODEV;
 603         }
 604         return 0;
 605 }
 606
 607 static enum power_supply_property pm860x_usb_props[] = {
 608         POWER_SUPPLY_PROP_STATUS,
 609         POWER_SUPPLY_PROP_ONLINE,
 610 };
 611
 612 static int pm860x_init_charger(struct pm860x_charger_info *info)
 613 {
 614         int ret;
 615
 616         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 617         if (ret < 0)
 618                 return ret;
 619
 620         mutex_lock(&info->lock);
 621         info->state = FSM_INIT;
 622         if (ret & STATUS2_CHG) {
 623                 info->online = 1;
 624                 info->allowed = 1;
 625         } else {
 626                 info->online = 0;
 627                 info->allowed = 0;
 628         }
 629         mutex_unlock(&info->lock);
 630
 631         set_charging_fsm(info);
 632         return 0;
 633 }
 634
 635 static struct pm860x_irq_desc {
 636         const char *name;
 637         irqreturn_t (*handler)(int irq, void *data);
 638 } pm860x_irq_descs[] = {
 639         { "usb supply detect", pm860x_charger_handler },
 640         { "charge done", pm860x_done_handler },
 641         { "charge timeout", pm860x_exception_handler },
 642         { "charge fault", pm860x_exception_handler },
 643         { "temperature", pm860x_temp_handler },
 644         { "vbatt", pm860x_vbattery_handler },
 645         { "vchg", pm860x_vchg_handler },
 646 };
 647
 648 static int pm860x_charger_probe(struct platform_device *pdev)
 649 {
 650         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 651         struct pm860x_charger_info *info;
 652         int ret;
 653         int count;
 654         int i;
 655         int j;
 656
 657         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 658         if (!info)
 659                 return -ENOMEM;
 660
 661         count = pdev->num_resources;
 662         for (i = 0, j = 0; i < count; i++) {
 663                 info->irq[j] = platform_get_irq(pdev, i);
 664                 if (info->irq[j] < 0)
 665                         continue;
 666                 j++;
 667         }
 668         info->irq_nums = j;
 669
 670         info->chip = chip;
 671         info->i2c =
 672             (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 673         info->i2c_8606 =
 674             (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
 675         if (!info->i2c_8606) {
 676                 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
 677                 ret = -EINVAL;
 678                 goto out;
 679         }
 680         info->dev = &pdev->dev;
 681
 682         /* set init value for the case we are not using battery */
 683         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
 684
 685         mutex_init(&info->lock);
 686         platform_set_drvdata(pdev, info);
 687
 688         info->usb.name = "usb";
 689         info->usb.type = POWER_SUPPLY_TYPE_USB;
 690         info->usb.supplied_to = pm860x_supplied_to;
 691         info->usb.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
 692         info->usb.properties = pm860x_usb_props;
 693         info->usb.num_properties = ARRAY_SIZE(pm860x_usb_props);
 694         info->usb.get_property = pm860x_usb_get_prop;
 695         ret = power_supply_register(&pdev->dev, &info->usb);
 696         if (ret)
 697                 goto out;
 698
 699         pm860x_init_charger(info);
 700
 701         for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
 702                 ret = request_threaded_irq(info->irq[i], NULL,
 703                         pm860x_irq_descs[i].handler,
 704                         IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
 705                 if (ret < 0) {
 706                         dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
 707                                 info->irq[i], ret);
 708                         goto out_irq;
 709                 }
 710         }
 711         return 0;
 712
 713 out_irq:
 714         while (--i >= 0)
 715                 free_irq(info->irq[i], info);
 716 out:
 717         return ret;
 718 }
 719
 720 static int pm860x_charger_remove(struct platform_device *pdev)
 721 {
 722         struct pm860x_charger_info *info = platform_get_drvdata(pdev);
 723         int i;
 724
 725         power_supply_unregister(&info->usb);
 726         free_irq(info->irq[0], info);
 727         for (i = 0; i < info->irq_nums; i++)
 728                 free_irq(info->irq[i], info);
 729         return 0;
 730 }
 731
 732 static struct platform_driver pm860x_charger_driver = {
 733         .driver = {
 734                    .name = "88pm860x-charger",
 735                    .owner = THIS_MODULE,
 736         },
 737         .probe = pm860x_charger_probe,
 738         .remove = pm860x_charger_remove,
 739 };
 740 module_platform_driver(pm860x_charger_driver);
 741
 742 MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
 743 MODULE_LICENSE("GPL");