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 = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
 300                         &data);
 301         if (ret) {
 302                 power_supply_put(psy);
 303                 return ret;
 304         }
 305         vbatt = data.intval / 1000;
 306
 307         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
 308         if (ret) {
 309                 power_supply_put(psy);
 310                 return ret;
 311         }
 312         power_supply_put(psy);
 313
 314         mutex_lock(&info->lock);
 315         info->present = data.intval;
 316
 317         dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
 318                 "Allowed:%d\n",
 319                 &fsm_state[info->state][0],
 320                 (info->online) ? "online" : "N/A",
 321                 (info->present) ? "present" : "N/A", info->allowed);
 322         dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
 323
 324         switch (info->state) {
 325         case FSM_INIT:
 326                 if (info->online && info->present && info->allowed) {
 327                         if (vbatt < PRECHARGE_THRESHOLD) {
 328                                 info->state = FSM_PRECHARGE;
 329                                 start_precharge(info);
 330                         } else if (vbatt > DISCHARGE_THRESHOLD) {
 331                                 info->state = FSM_DISCHARGE;
 332                                 stop_charge(info, vbatt);
 333                         } else if (vbatt < DISCHARGE_THRESHOLD) {
 334                                 info->state = FSM_FASTCHARGE;
 335                                 start_fastcharge(info);
 336                         }
 337                 } else {
 338                         if (vbatt < POWEROFF_THRESHOLD) {
 339                                 power_off_notification(info);
 340                         } else {
 341                                 info->state = FSM_DISCHARGE;
 342                                 stop_charge(info, vbatt);
 343                         }
 344                 }
 345                 break;
 346         case FSM_PRECHARGE:
 347                 if (info->online && info->present && info->allowed) {
 348                         if (vbatt > PRECHARGE_THRESHOLD) {
 349                                 info->state = FSM_FASTCHARGE;
 350                                 start_fastcharge(info);
 351                         }
 352                 } else {
 353                         info->state = FSM_DISCHARGE;
 354                         stop_charge(info, vbatt);
 355                 }
 356                 break;
 357         case FSM_FASTCHARGE:
 358                 if (info->online && info->present && info->allowed) {
 359                         if (vbatt < PRECHARGE_THRESHOLD) {
 360                                 info->state = FSM_PRECHARGE;
 361                                 start_precharge(info);
 362                         }
 363                 } else {
 364                         info->state = FSM_DISCHARGE;
 365                         stop_charge(info, vbatt);
 366                 }
 367                 break;
 368         case FSM_DISCHARGE:
 369                 if (info->online && info->present && info->allowed) {
 370                         if (vbatt < PRECHARGE_THRESHOLD) {
 371                                 info->state = FSM_PRECHARGE;
 372                                 start_precharge(info);
 373                         } else if (vbatt < DISCHARGE_THRESHOLD) {
 374                                 info->state = FSM_FASTCHARGE;
 375                                 start_fastcharge(info);
 376                         }
 377                 } else {
 378                         if (vbatt < POWEROFF_THRESHOLD)
 379                                 power_off_notification(info);
 380                         else if (vbatt > CHARGE_THRESHOLD && info->online)
 381                                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
 382                 }
 383                 break;
 384         default:
 385                 dev_warn(info->dev, "FSM meets wrong state:%d\n",
 386                          info->state);
 387                 break;
 388         }
 389         dev_dbg(info->dev,
 390                 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
 391                 &fsm_state[info->state][0],
 392                 (info->online) ? "online" : "N/A",
 393                 (info->present) ? "present" : "N/A", info->allowed);
 394         mutex_unlock(&info->lock);
 395
 396         return 0;
 397 }
 398
 399 static irqreturn_t pm860x_charger_handler(int irq, void *data)
 400 {
 401         struct pm860x_charger_info *info = data;
 402         int ret;
 403
 404         mutex_lock(&info->lock);
 405         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 406         if (ret < 0) {
 407                 mutex_unlock(&info->lock);
 408                 goto out;
 409         }
 410         if (ret & STATUS2_CHG) {
 411                 info->online = 1;
 412                 info->allowed = 1;
 413         } else {
 414                 info->online = 0;
 415                 info->allowed = 0;
 416         }
 417         mutex_unlock(&info->lock);
 418         dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
 419                 (info->online) ? "online" : "N/A", info->allowed);
 420
 421         set_charging_fsm(info);
 422
 423         power_supply_changed(info->usb);
 424 out:
 425         return IRQ_HANDLED;
 426 }
 427
 428 static irqreturn_t pm860x_temp_handler(int irq, void *data)
 429 {
 430         struct power_supply *psy;
 431         struct pm860x_charger_info *info = data;
 432         union power_supply_propval temp;
 433         int value;
 434         int ret;
 435
 436         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 437         if (!psy)
 438                 goto out;
 439         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
 440         if (ret)
 441                 goto out;
 442         value = temp.intval / 10;
 443
 444         mutex_lock(&info->lock);
 445         /* Temperature < -10 C or >40 C, Will not allow charge */
 446         if (value < -10 || value > 40)
 447                 info->allowed = 0;
 448         else
 449                 info->allowed = 1;
 450         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 451         mutex_unlock(&info->lock);
 452
 453         set_charging_fsm(info);
 454 out:
 455         power_supply_put(psy);
 456         return IRQ_HANDLED;
 457 }
 458
 459 static irqreturn_t pm860x_exception_handler(int irq, void *data)
 460 {
 461         struct pm860x_charger_info *info = data;
 462
 463         mutex_lock(&info->lock);
 464         info->allowed = 0;
 465         mutex_unlock(&info->lock);
 466         dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
 467
 468         set_charging_fsm(info);
 469         return IRQ_HANDLED;
 470 }
 471
 472 static irqreturn_t pm860x_done_handler(int irq, void *data)
 473 {
 474         struct pm860x_charger_info *info = data;
 475         struct power_supply *psy;
 476         union power_supply_propval val;
 477         int ret;
 478         int vbatt;
 479
 480         mutex_lock(&info->lock);
 481         /* pre-charge done, will transimit to fast-charge stage */
 482         if (info->state == FSM_PRECHARGE) {
 483                 info->allowed = 1;
 484                 goto out;
 485         }
 486         /*
 487          * Fast charge done, delay to read
 488          * the correct status of CHG_DET.
 489          */
 490         mdelay(5);
 491         info->allowed = 0;
 492         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 493         if (!psy)
 494                 goto out;
 495         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
 496                         &val);
 497         if (ret)
 498                 goto out_psy_put;
 499         vbatt = val.intval / 1000;
 500         /*
 501          * CHG_DONE interrupt is faster than CHG_DET interrupt when
 502          * plug in/out usb, So we can not rely on info->online, we
 503          * need check pm8607 status register to check usb is online
 504          * or not, then we can decide it is real charge done
 505          * automatically or it is triggered by usb plug out;
 506          */
 507         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 508         if (ret < 0)
 509                 goto out_psy_put;
 510         if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
 511                 power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
 512                                 &val);
 513
 514 out_psy_put:
 515         power_supply_put(psy);
 516 out:
 517         mutex_unlock(&info->lock);
 518         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 519         set_charging_fsm(info);
 520
 521         return IRQ_HANDLED;
 522 }
 523
 524 static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
 525 {
 526         struct pm860x_charger_info *info = data;
 527
 528         mutex_lock(&info->lock);
 529
 530         set_vbatt_threshold(info, 0, 0);
 531
 532         if (info->present && info->online)
 533                 info->allowed = 1;
 534         else
 535                 info->allowed = 0;
 536         mutex_unlock(&info->lock);
 537         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 538
 539         set_charging_fsm(info);
 540
 541         return IRQ_HANDLED;
 542 }
 543
 544 static irqreturn_t pm860x_vchg_handler(int irq, void *data)
 545 {
 546         struct pm860x_charger_info *info = data;
 547         int vchg = 0;
 548
 549         if (info->present)
 550                 goto out;
 551
 552         measure_vchg(info, &vchg);
 553
 554         mutex_lock(&info->lock);
 555         if (!info->online) {
 556                 int status;
 557                 /* check if over-temp on pm8606 or not */
 558                 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
 559                 if (status & OVER_TEMP_FLAG) {
 560                         /* clear over temp flag and set auto recover */
 561                         pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
 562                                         OVER_TEMP_FLAG, OVER_TEMP_FLAG);
 563                         pm860x_set_bits(info->i2c_8606,
 564                                         PM8606_VSYS,
 565                                         OVTEMP_AUTORECOVER,
 566                                         OVTEMP_AUTORECOVER);
 567                         dev_dbg(info->dev,
 568                                 "%s, pm8606 over-temp occurred\n", __func__);
 569                 }
 570         }
 571
 572         if (vchg > VCHG_NORMAL_CHECK) {
 573                 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
 574                 info->allowed = 0;
 575                 dev_dbg(info->dev,
 576                         "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
 577                         __func__, vchg);
 578         } else if (vchg < VCHG_OVP_LOW) {
 579                 set_vchg_threshold(info, VCHG_NORMAL_LOW,
 580                                    VCHG_NORMAL_HIGH);
 581                 info->allowed = 1;
 582                 dev_dbg(info->dev,
 583                         "%s,pm8607 over-vchg recover,vchg = %dmv\n",
 584                         __func__, vchg);
 585         }
 586         mutex_unlock(&info->lock);
 587
 588         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 589         set_charging_fsm(info);
 590 out:
 591         return IRQ_HANDLED;
 592 }
 593
 594 static int pm860x_usb_get_prop(struct power_supply *psy,
 595                                enum power_supply_property psp,
 596                                union power_supply_propval *val)
 597 {
 598         struct pm860x_charger_info *info = power_supply_get_drvdata(psy);
 599
 600         switch (psp) {
 601         case POWER_SUPPLY_PROP_STATUS:
 602                 if (info->state == FSM_FASTCHARGE ||
 603                                 info->state == FSM_PRECHARGE)
 604                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 605                 else
 606                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 607                 break;
 608         case POWER_SUPPLY_PROP_ONLINE:
 609                 val->intval = info->online;
 610                 break;
 611         default:
 612                 return -ENODEV;
 613         }
 614         return 0;
 615 }
 616
 617 static enum power_supply_property pm860x_usb_props[] = {
 618         POWER_SUPPLY_PROP_STATUS,
 619         POWER_SUPPLY_PROP_ONLINE,
 620 };
 621
 622 static int pm860x_init_charger(struct pm860x_charger_info *info)
 623 {
 624         int ret;
 625
 626         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 627         if (ret < 0)
 628                 return ret;
 629
 630         mutex_lock(&info->lock);
 631         info->state = FSM_INIT;
 632         if (ret & STATUS2_CHG) {
 633                 info->online = 1;
 634                 info->allowed = 1;
 635         } else {
 636                 info->online = 0;
 637                 info->allowed = 0;
 638         }
 639         mutex_unlock(&info->lock);
 640
 641         set_charging_fsm(info);
 642         return 0;
 643 }
 644
 645 static struct pm860x_irq_desc {
 646         const char *name;
 647         irqreturn_t (*handler)(int irq, void *data);
 648 } pm860x_irq_descs[] = {
 649         { "usb supply detect", pm860x_charger_handler },
 650         { "charge done", pm860x_done_handler },
 651         { "charge timeout", pm860x_exception_handler },
 652         { "charge fault", pm860x_exception_handler },
 653         { "temperature", pm860x_temp_handler },
 654         { "vbatt", pm860x_vbattery_handler },
 655         { "vchg", pm860x_vchg_handler },
 656 };
 657
 658 static const struct power_supply_desc pm860x_charger_desc = {
 659         .name           = "usb",
 660         .type           = POWER_SUPPLY_TYPE_USB,
 661         .properties     = pm860x_usb_props,
 662         .num_properties = ARRAY_SIZE(pm860x_usb_props),
 663         .get_property   = pm860x_usb_get_prop,
 664 };
 665
 666 static int pm860x_charger_probe(struct platform_device *pdev)
 667 {
 668         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 669         struct power_supply_config psy_cfg = {};
 670         struct pm860x_charger_info *info;
 671         int ret;
 672         int count;
 673         int i;
 674         int j;
 675
 676         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 677         if (!info)
 678                 return -ENOMEM;
 679
 680         count = pdev->num_resources;
 681         for (i = 0, j = 0; i < count; i++) {
 682                 info->irq[j] = platform_get_irq(pdev, i);
 683                 if (info->irq[j] < 0)
 684                         continue;
 685                 j++;
 686         }
 687         info->irq_nums = j;
 688
 689         info->chip = chip;
 690         info->i2c =
 691             (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 692         info->i2c_8606 =
 693             (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
 694         if (!info->i2c_8606) {
 695                 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
 696                 ret = -EINVAL;
 697                 goto out;
 698         }
 699         info->dev = &pdev->dev;
 700
 701         /* set init value for the case we are not using battery */
 702         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
 703
 704         mutex_init(&info->lock);
 705         platform_set_drvdata(pdev, info);
 706
 707         psy_cfg.drv_data = info;
 708         psy_cfg.supplied_to = pm860x_supplied_to;
 709         psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
 710         info->usb = power_supply_register(&pdev->dev, &pm860x_charger_desc,
 711                                           &psy_cfg);
 712         if (IS_ERR(info->usb)) {
 713                 ret = PTR_ERR(info->usb);
 714                 goto out;
 715         }
 716
 717         pm860x_init_charger(info);
 718
 719         for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
 720                 ret = request_threaded_irq(info->irq[i], NULL,
 721                         pm860x_irq_descs[i].handler,
 722                         IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
 723                 if (ret < 0) {
 724                         dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
 725                                 info->irq[i], ret);
 726                         goto out_irq;
 727                 }
 728         }
 729         return 0;
 730
 731 out_irq:
 732         power_supply_unregister(info->usb);
 733         while (--i >= 0)
 734                 free_irq(info->irq[i], info);
 735 out:
 736         return ret;
 737 }
 738
 739 static int pm860x_charger_remove(struct platform_device *pdev)
 740 {
 741         struct pm860x_charger_info *info = platform_get_drvdata(pdev);
 742         int i;
 743
 744         power_supply_unregister(info->usb);
 745         for (i = 0; i < info->irq_nums; i++)
 746                 free_irq(info->irq[i], info);
 747         return 0;
 748 }
 749
 750 static struct platform_driver pm860x_charger_driver = {
 751         .driver = {
 752                    .name = "88pm860x-charger",
 753         },
 754         .probe = pm860x_charger_probe,
 755         .remove = pm860x_charger_remove,
 756 };
 757 module_platform_driver(pm860x_charger_driver);
 758
 759 MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
 760 MODULE_LICENSE("GPL");