drivers/power/supply/88pm860x_charger.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Battery driver for Marvell 88PM860x PMIC
   4  *
   5  * Copyright (c) 2012 Marvell International Ltd.
   6  * Author:      Jett Zhou <jtzhou@marvell.com>
   7  *              Haojian Zhuang <haojian.zhuang@marvell.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/slab.h>
  14 #include <linux/power_supply.h>
  15 #include <linux/mfd/88pm860x.h>
  16 #include <linux/delay.h>
  17 #include <linux/uaccess.h>
  18 #include <asm/div64.h>
  19
  20 /* bit definitions of Status Query Interface 2 */
  21 #define STATUS2_CHG             (1 << 2)
  22
  23 /* bit definitions of Reset Out Register */
  24 #define RESET_SW_PD             (1 << 7)
  25
  26 /* bit definitions of PreReg 1 */
  27 #define PREREG1_90MA            (0x0)
  28 #define PREREG1_180MA           (0x1)
  29 #define PREREG1_450MA           (0x4)
  30 #define PREREG1_540MA           (0x5)
  31 #define PREREG1_1350MA          (0xE)
  32 #define PREREG1_VSYS_4_5V       (3 << 4)
  33
  34 /* bit definitions of Charger Control 1 Register */
  35 #define CC1_MODE_OFF            (0)
  36 #define CC1_MODE_PRECHARGE      (1)
  37 #define CC1_MODE_FASTCHARGE     (2)
  38 #define CC1_MODE_PULSECHARGE    (3)
  39 #define CC1_ITERM_20MA          (0 << 2)
  40 #define CC1_ITERM_60MA          (2 << 2)
  41 #define CC1_VFCHG_4_2V          (9 << 4)
  42
  43 /* bit definitions of Charger Control 2 Register */
  44 #define CC2_ICHG_100MA          (0x1)
  45 #define CC2_ICHG_500MA          (0x9)
  46 #define CC2_ICHG_1000MA         (0x13)
  47
  48 /* bit definitions of Charger Control 3 Register */
  49 #define CC3_180MIN_TIMEOUT      (0x6 << 4)
  50 #define CC3_270MIN_TIMEOUT      (0x7 << 4)
  51 #define CC3_360MIN_TIMEOUT      (0xA << 4)
  52 #define CC3_DISABLE_TIMEOUT     (0xF << 4)
  53
  54 /* bit definitions of Charger Control 4 Register */
  55 #define CC4_IPRE_40MA           (7)
  56 #define CC4_VPCHG_3_2V          (3 << 4)
  57 #define CC4_IFCHG_MON_EN        (1 << 6)
  58 #define CC4_BTEMP_MON_EN        (1 << 7)
  59
  60 /* bit definitions of Charger Control 6 Register */
  61 #define CC6_BAT_OV_EN           (1 << 2)
  62 #define CC6_BAT_UV_EN           (1 << 3)
  63 #define CC6_UV_VBAT_SET         (0x3 << 6)      /* 2.8v */
  64
  65 /* bit definitions of Charger Control 7 Register */
  66 #define CC7_BAT_REM_EN          (1 << 3)
  67 #define CC7_IFSM_EN             (1 << 7)
  68
  69 /* bit definitions of Measurement Enable 1 Register */
  70 #define MEAS1_VBAT              (1 << 0)
  71
  72 /* bit definitions of Measurement Enable 3 Register */
  73 #define MEAS3_IBAT_EN           (1 << 0)
  74 #define MEAS3_CC_EN             (1 << 2)
  75
  76 #define FSM_INIT                0
  77 #define FSM_DISCHARGE           1
  78 #define FSM_PRECHARGE           2
  79 #define FSM_FASTCHARGE          3
  80
  81 #define PRECHARGE_THRESHOLD     3100
  82 #define POWEROFF_THRESHOLD      3400
  83 #define CHARGE_THRESHOLD        4000
  84 #define DISCHARGE_THRESHOLD     4180
  85
  86 /* over-temperature on PM8606 setting */
  87 #define OVER_TEMP_FLAG          (1 << 6)
  88 #define OVTEMP_AUTORECOVER      (1 << 3)
  89
  90 /* over-voltage protect on vchg setting mv */
  91 #define VCHG_NORMAL_LOW         4200
  92 #define VCHG_NORMAL_CHECK       5800
  93 #define VCHG_NORMAL_HIGH        6000
  94 #define VCHG_OVP_LOW            5500
  95
  96 struct pm860x_charger_info {
  97         struct pm860x_chip *chip;
  98         struct i2c_client *i2c;
  99         struct i2c_client *i2c_8606;
 100         struct device *dev;
 101
 102         struct power_supply *usb;
 103         struct mutex lock;
 104         int irq_nums;
 105         int irq[7];
 106         unsigned state:3;       /* fsm state */
 107         unsigned online:1;      /* usb charger */
 108         unsigned present:1;     /* battery present */
 109         unsigned allowed:1;
 110 };
 111
 112 static char *pm860x_supplied_to[] = {
 113         "battery-monitor",
 114 };
 115
 116 static int measure_vchg(struct pm860x_charger_info *info, int *data)
 117 {
 118         unsigned char buf[2];
 119         int ret = 0;
 120
 121         ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
 122         if (ret < 0)
 123                 return ret;
 124
 125         *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
 126         /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
 127         *data = ((*data & 0xfff) * 9 * 125) >> 9;
 128
 129         dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
 130
 131         return ret;
 132 }
 133
 134 static void set_vchg_threshold(struct pm860x_charger_info *info,
 135                                int min, int max)
 136 {
 137         int data;
 138
 139         /* (tmp << 8) * / 5 / 1800 */
 140         if (min <= 0)
 141                 data = 0;
 142         else
 143                 data = (min << 5) / 1125;
 144         pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
 145         dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
 146
 147         if (max <= 0)
 148                 data = 0xff;
 149         else
 150                 data = (max << 5) / 1125;
 151         pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
 152         dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
 153
 154 }
 155
 156 static void set_vbatt_threshold(struct pm860x_charger_info *info,
 157                                 int min, int max)
 158 {
 159         int data;
 160
 161         /* (tmp << 8) * 3 / 1800 */
 162         if (min <= 0)
 163                 data = 0;
 164         else
 165                 data = (min << 5) / 675;
 166         pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
 167         dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
 168
 169         if (max <= 0)
 170                 data = 0xff;
 171         else
 172                 data = (max << 5) / 675;
 173         pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
 174         dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
 175
 176         return;
 177 }
 178
 179 static int start_precharge(struct pm860x_charger_info *info)
 180 {
 181         int ret;
 182
 183         dev_dbg(info->dev, "Start Pre-charging!\n");
 184         set_vbatt_threshold(info, 0, 0);
 185
 186         ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
 187                                PREREG1_1350MA | PREREG1_VSYS_4_5V);
 188         if (ret < 0)
 189                 goto out;
 190         /* stop charging */
 191         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
 192                               CC1_MODE_OFF);
 193         if (ret < 0)
 194                 goto out;
 195         /* set 270 minutes timeout */
 196         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
 197                               CC3_270MIN_TIMEOUT);
 198         if (ret < 0)
 199                 goto out;
 200         /* set precharge current, termination voltage, IBAT & TBAT monitor */
 201         ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
 202                                CC4_IPRE_40MA | CC4_VPCHG_3_2V |
 203                                CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
 204         if (ret < 0)
 205                 goto out;
 206         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
 207                               CC7_BAT_REM_EN | CC7_IFSM_EN,
 208                               CC7_BAT_REM_EN | CC7_IFSM_EN);
 209         if (ret < 0)
 210                 goto out;
 211         /* trigger precharge */
 212         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
 213                               CC1_MODE_PRECHARGE);
 214 out:
 215         return ret;
 216 }
 217
 218 static int start_fastcharge(struct pm860x_charger_info *info)
 219 {
 220         int ret;
 221
 222         dev_dbg(info->dev, "Start Fast-charging!\n");
 223
 224         /* set fastcharge termination current & voltage, disable charging */
 225         ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
 226                                CC1_MODE_OFF | CC1_ITERM_60MA |
 227                                CC1_VFCHG_4_2V);
 228         if (ret < 0)
 229                 goto out;
 230         ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
 231                                PREREG1_540MA | PREREG1_VSYS_4_5V);
 232         if (ret < 0)
 233                 goto out;
 234         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
 235                               CC2_ICHG_500MA);
 236         if (ret < 0)
 237                 goto out;
 238         /* set 270 minutes timeout */
 239         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
 240                               CC3_270MIN_TIMEOUT);
 241         if (ret < 0)
 242                 goto out;
 243         /* set IBAT & TBAT monitor */
 244         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
 245                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
 246                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
 247         if (ret < 0)
 248                 goto out;
 249         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
 250                               CC6_BAT_OV_EN | CC6_BAT_UV_EN |
 251                               CC6_UV_VBAT_SET,
 252                               CC6_BAT_OV_EN | CC6_BAT_UV_EN |
 253                               CC6_UV_VBAT_SET);
 254         if (ret < 0)
 255                 goto out;
 256         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
 257                               CC7_BAT_REM_EN | CC7_IFSM_EN,
 258                               CC7_BAT_REM_EN | CC7_IFSM_EN);
 259         if (ret < 0)
 260                 goto out;
 261         /* launch fast-charge */
 262         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
 263                               CC1_MODE_FASTCHARGE);
 264         /* vchg threshold setting */
 265         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
 266 out:
 267         return ret;
 268 }
 269
 270 static void stop_charge(struct pm860x_charger_info *info, int vbatt)
 271 {
 272         dev_dbg(info->dev, "Stop charging!\n");
 273         pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
 274         if (vbatt > CHARGE_THRESHOLD && info->online)
 275                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
 276 }
 277
 278 static void power_off_notification(struct pm860x_charger_info *info)
 279 {
 280         dev_dbg(info->dev, "Power-off notification!\n");
 281 }
 282
 283 static int set_charging_fsm(struct pm860x_charger_info *info)
 284 {
 285         struct power_supply *psy;
 286         union power_supply_propval data;
 287         unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
 288                 "fastcharge",
 289         };
 290         int ret;
 291         int vbatt;
 292
 293         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 294         if (!psy)
 295                 return -EINVAL;
 296         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
 297                         &data);
 298         if (ret) {
 299                 power_supply_put(psy);
 300                 return ret;
 301         }
 302         vbatt = data.intval / 1000;
 303
 304         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
 305         if (ret) {
 306                 power_supply_put(psy);
 307                 return ret;
 308         }
 309         power_supply_put(psy);
 310
 311         mutex_lock(&info->lock);
 312         info->present = data.intval;
 313
 314         dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
 315                 "Allowed:%d\n",
 316                 &fsm_state[info->state][0],
 317                 (info->online) ? "online" : "N/A",
 318                 (info->present) ? "present" : "N/A", info->allowed);
 319         dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
 320
 321         switch (info->state) {
 322         case FSM_INIT:
 323                 if (info->online && info->present && info->allowed) {
 324                         if (vbatt < PRECHARGE_THRESHOLD) {
 325                                 info->state = FSM_PRECHARGE;
 326                                 start_precharge(info);
 327                         } else if (vbatt > DISCHARGE_THRESHOLD) {
 328                                 info->state = FSM_DISCHARGE;
 329                                 stop_charge(info, vbatt);
 330                         } else if (vbatt < DISCHARGE_THRESHOLD) {
 331                                 info->state = FSM_FASTCHARGE;
 332                                 start_fastcharge(info);
 333                         }
 334                 } else {
 335                         if (vbatt < POWEROFF_THRESHOLD) {
 336                                 power_off_notification(info);
 337                         } else {
 338                                 info->state = FSM_DISCHARGE;
 339                                 stop_charge(info, vbatt);
 340                         }
 341                 }
 342                 break;
 343         case FSM_PRECHARGE:
 344                 if (info->online && info->present && info->allowed) {
 345                         if (vbatt > PRECHARGE_THRESHOLD) {
 346                                 info->state = FSM_FASTCHARGE;
 347                                 start_fastcharge(info);
 348                         }
 349                 } else {
 350                         info->state = FSM_DISCHARGE;
 351                         stop_charge(info, vbatt);
 352                 }
 353                 break;
 354         case FSM_FASTCHARGE:
 355                 if (info->online && info->present && info->allowed) {
 356                         if (vbatt < PRECHARGE_THRESHOLD) {
 357                                 info->state = FSM_PRECHARGE;
 358                                 start_precharge(info);
 359                         }
 360                 } else {
 361                         info->state = FSM_DISCHARGE;
 362                         stop_charge(info, vbatt);
 363                 }
 364                 break;
 365         case FSM_DISCHARGE:
 366                 if (info->online && info->present && info->allowed) {
 367                         if (vbatt < PRECHARGE_THRESHOLD) {
 368                                 info->state = FSM_PRECHARGE;
 369                                 start_precharge(info);
 370                         } else if (vbatt < DISCHARGE_THRESHOLD) {
 371                                 info->state = FSM_FASTCHARGE;
 372                                 start_fastcharge(info);
 373                         }
 374                 } else {
 375                         if (vbatt < POWEROFF_THRESHOLD)
 376                                 power_off_notification(info);
 377                         else if (vbatt > CHARGE_THRESHOLD && info->online)
 378                                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
 379                 }
 380                 break;
 381         default:
 382                 dev_warn(info->dev, "FSM meets wrong state:%d\n",
 383                          info->state);
 384                 break;
 385         }
 386         dev_dbg(info->dev,
 387                 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
 388                 &fsm_state[info->state][0],
 389                 (info->online) ? "online" : "N/A",
 390                 (info->present) ? "present" : "N/A", info->allowed);
 391         mutex_unlock(&info->lock);
 392
 393         return 0;
 394 }
 395
 396 static irqreturn_t pm860x_charger_handler(int irq, void *data)
 397 {
 398         struct pm860x_charger_info *info = data;
 399         int ret;
 400
 401         mutex_lock(&info->lock);
 402         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 403         if (ret < 0) {
 404                 mutex_unlock(&info->lock);
 405                 goto out;
 406         }
 407         if (ret & STATUS2_CHG) {
 408                 info->online = 1;
 409                 info->allowed = 1;
 410         } else {
 411                 info->online = 0;
 412                 info->allowed = 0;
 413         }
 414         mutex_unlock(&info->lock);
 415         dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
 416                 (info->online) ? "online" : "N/A", info->allowed);
 417
 418         set_charging_fsm(info);
 419
 420         power_supply_changed(info->usb);
 421 out:
 422         return IRQ_HANDLED;
 423 }
 424
 425 static irqreturn_t pm860x_temp_handler(int irq, void *data)
 426 {
 427         struct power_supply *psy;
 428         struct pm860x_charger_info *info = data;
 429         union power_supply_propval temp;
 430         int value;
 431         int ret;
 432
 433         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 434         if (!psy)
 435                 return IRQ_HANDLED;
 436         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
 437         if (ret)
 438                 goto out;
 439         value = temp.intval / 10;
 440
 441         mutex_lock(&info->lock);
 442         /* Temperature < -10 C or >40 C, Will not allow charge */
 443         if (value < -10 || value > 40)
 444                 info->allowed = 0;
 445         else
 446                 info->allowed = 1;
 447         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 448         mutex_unlock(&info->lock);
 449
 450         set_charging_fsm(info);
 451 out:
 452         power_supply_put(psy);
 453         return IRQ_HANDLED;
 454 }
 455
 456 static irqreturn_t pm860x_exception_handler(int irq, void *data)
 457 {
 458         struct pm860x_charger_info *info = data;
 459
 460         mutex_lock(&info->lock);
 461         info->allowed = 0;
 462         mutex_unlock(&info->lock);
 463         dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
 464
 465         set_charging_fsm(info);
 466         return IRQ_HANDLED;
 467 }
 468
 469 static irqreturn_t pm860x_done_handler(int irq, void *data)
 470 {
 471         struct pm860x_charger_info *info = data;
 472         struct power_supply *psy;
 473         union power_supply_propval val;
 474         int ret;
 475         int vbatt;
 476
 477         mutex_lock(&info->lock);
 478         /* pre-charge done, will transimit to fast-charge stage */
 479         if (info->state == FSM_PRECHARGE) {
 480                 info->allowed = 1;
 481                 goto out;
 482         }
 483         /*
 484          * Fast charge done, delay to read
 485          * the correct status of CHG_DET.
 486          */
 487         mdelay(5);
 488         info->allowed = 0;
 489         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
 490         if (!psy)
 491                 goto out;
 492         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
 493                         &val);
 494         if (ret)
 495                 goto out_psy_put;
 496         vbatt = val.intval / 1000;
 497         /*
 498          * CHG_DONE interrupt is faster than CHG_DET interrupt when
 499          * plug in/out usb, So we can not rely on info->online, we
 500          * need check pm8607 status register to check usb is online
 501          * or not, then we can decide it is real charge done
 502          * automatically or it is triggered by usb plug out;
 503          */
 504         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 505         if (ret < 0)
 506                 goto out_psy_put;
 507         if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
 508                 power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
 509                                 &val);
 510
 511 out_psy_put:
 512         power_supply_put(psy);
 513 out:
 514         mutex_unlock(&info->lock);
 515         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 516         set_charging_fsm(info);
 517
 518         return IRQ_HANDLED;
 519 }
 520
 521 static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
 522 {
 523         struct pm860x_charger_info *info = data;
 524
 525         mutex_lock(&info->lock);
 526
 527         set_vbatt_threshold(info, 0, 0);
 528
 529         if (info->present && info->online)
 530                 info->allowed = 1;
 531         else
 532                 info->allowed = 0;
 533         mutex_unlock(&info->lock);
 534         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 535
 536         set_charging_fsm(info);
 537
 538         return IRQ_HANDLED;
 539 }
 540
 541 static irqreturn_t pm860x_vchg_handler(int irq, void *data)
 542 {
 543         struct pm860x_charger_info *info = data;
 544         int vchg = 0;
 545
 546         if (info->present)
 547                 goto out;
 548
 549         measure_vchg(info, &vchg);
 550
 551         mutex_lock(&info->lock);
 552         if (!info->online) {
 553                 int status;
 554                 /* check if over-temp on pm8606 or not */
 555                 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
 556                 if (status & OVER_TEMP_FLAG) {
 557                         /* clear over temp flag and set auto recover */
 558                         pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
 559                                         OVER_TEMP_FLAG, OVER_TEMP_FLAG);
 560                         pm860x_set_bits(info->i2c_8606,
 561                                         PM8606_VSYS,
 562                                         OVTEMP_AUTORECOVER,
 563                                         OVTEMP_AUTORECOVER);
 564                         dev_dbg(info->dev,
 565                                 "%s, pm8606 over-temp occurred\n", __func__);
 566                 }
 567         }
 568
 569         if (vchg > VCHG_NORMAL_CHECK) {
 570                 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
 571                 info->allowed = 0;
 572                 dev_dbg(info->dev,
 573                         "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
 574                         __func__, vchg);
 575         } else if (vchg < VCHG_OVP_LOW) {
 576                 set_vchg_threshold(info, VCHG_NORMAL_LOW,
 577                                    VCHG_NORMAL_HIGH);
 578                 info->allowed = 1;
 579                 dev_dbg(info->dev,
 580                         "%s,pm8607 over-vchg recover,vchg = %dmv\n",
 581                         __func__, vchg);
 582         }
 583         mutex_unlock(&info->lock);
 584
 585         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
 586         set_charging_fsm(info);
 587 out:
 588         return IRQ_HANDLED;
 589 }
 590
 591 static int pm860x_usb_get_prop(struct power_supply *psy,
 592                                enum power_supply_property psp,
 593                                union power_supply_propval *val)
 594 {
 595         struct pm860x_charger_info *info = power_supply_get_drvdata(psy);
 596
 597         switch (psp) {
 598         case POWER_SUPPLY_PROP_STATUS:
 599                 if (info->state == FSM_FASTCHARGE ||
 600                                 info->state == FSM_PRECHARGE)
 601                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 602                 else
 603                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 604                 break;
 605         case POWER_SUPPLY_PROP_ONLINE:
 606                 val->intval = info->online;
 607                 break;
 608         default:
 609                 return -ENODEV;
 610         }
 611         return 0;
 612 }
 613
 614 static enum power_supply_property pm860x_usb_props[] = {
 615         POWER_SUPPLY_PROP_STATUS,
 616         POWER_SUPPLY_PROP_ONLINE,
 617 };
 618
 619 static int pm860x_init_charger(struct pm860x_charger_info *info)
 620 {
 621         int ret;
 622
 623         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
 624         if (ret < 0)
 625                 return ret;
 626
 627         mutex_lock(&info->lock);
 628         info->state = FSM_INIT;
 629         if (ret & STATUS2_CHG) {
 630                 info->online = 1;
 631                 info->allowed = 1;
 632         } else {
 633                 info->online = 0;
 634                 info->allowed = 0;
 635         }
 636         mutex_unlock(&info->lock);
 637
 638         set_charging_fsm(info);
 639         return 0;
 640 }
 641
 642 static struct pm860x_irq_desc {
 643         const char *name;
 644         irqreturn_t (*handler)(int irq, void *data);
 645 } pm860x_irq_descs[] = {
 646         { "usb supply detect", pm860x_charger_handler },
 647         { "charge done", pm860x_done_handler },
 648         { "charge timeout", pm860x_exception_handler },
 649         { "charge fault", pm860x_exception_handler },
 650         { "temperature", pm860x_temp_handler },
 651         { "vbatt", pm860x_vbattery_handler },
 652         { "vchg", pm860x_vchg_handler },
 653 };
 654
 655 static const struct power_supply_desc pm860x_charger_desc = {
 656         .name           = "usb",
 657         .type           = POWER_SUPPLY_TYPE_USB,
 658         .properties     = pm860x_usb_props,
 659         .num_properties = ARRAY_SIZE(pm860x_usb_props),
 660         .get_property   = pm860x_usb_get_prop,
 661 };
 662
 663 static int pm860x_charger_probe(struct platform_device *pdev)
 664 {
 665         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 666         struct power_supply_config psy_cfg = {};
 667         struct pm860x_charger_info *info;
 668         int ret;
 669         int count;
 670         int i;
 671         int j;
 672
 673         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 674         if (!info)
 675                 return -ENOMEM;
 676
 677         count = pdev->num_resources;
 678         for (i = 0, j = 0; i < count; i++) {
 679                 info->irq[j] = platform_get_irq(pdev, i);
 680                 if (info->irq[j] < 0)
 681                         continue;
 682                 j++;
 683         }
 684         info->irq_nums = j;
 685
 686         info->chip = chip;
 687         info->i2c =
 688             (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 689         info->i2c_8606 =
 690             (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
 691         if (!info->i2c_8606) {
 692                 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
 693                 ret = -EINVAL;
 694                 goto out;
 695         }
 696         info->dev = &pdev->dev;
 697
 698         /* set init value for the case we are not using battery */
 699         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
 700
 701         mutex_init(&info->lock);
 702         platform_set_drvdata(pdev, info);
 703
 704         psy_cfg.drv_data = info;
 705         psy_cfg.supplied_to = pm860x_supplied_to;
 706         psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
 707         info->usb = power_supply_register(&pdev->dev, &pm860x_charger_desc,
 708                                           &psy_cfg);
 709         if (IS_ERR(info->usb)) {
 710                 ret = PTR_ERR(info->usb);
 711                 goto out;
 712         }
 713
 714         pm860x_init_charger(info);
 715
 716         for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
 717                 ret = request_threaded_irq(info->irq[i], NULL,
 718                         pm860x_irq_descs[i].handler,
 719                         IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
 720                 if (ret < 0) {
 721                         dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
 722                                 info->irq[i], ret);
 723                         goto out_irq;
 724                 }
 725         }
 726         return 0;
 727
 728 out_irq:
 729         power_supply_unregister(info->usb);
 730         while (--i >= 0)
 731                 free_irq(info->irq[i], info);
 732 out:
 733         return ret;
 734 }
 735
 736 static int pm860x_charger_remove(struct platform_device *pdev)
 737 {
 738         struct pm860x_charger_info *info = platform_get_drvdata(pdev);
 739         int i;
 740
 741         power_supply_unregister(info->usb);
 742         for (i = 0; i < info->irq_nums; i++)
 743                 free_irq(info->irq[i], info);
 744         return 0;
 745 }
 746
 747 static struct platform_driver pm860x_charger_driver = {
 748         .driver = {
 749                    .name = "88pm860x-charger",
 750         },
 751         .probe = pm860x_charger_probe,
 752         .remove = pm860x_charger_remove,
 753 };
 754 module_platform_driver(pm860x_charger_driver);
 755
 756 MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
 757 MODULE_LICENSE("GPL");