linux/drivers/power/88pm860x_charger.c
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   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
  99struct 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
 115static char *pm860x_supplied_to[] = {
 116        "battery-monitor",
 117};
 118
 119static 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
 137static 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
 159static 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
 182static 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);
 217out:
 218        return ret;
 219}
 220
 221static 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);
 269out:
 270        return ret;
 271}
 272
 273static 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
 281static void power_off_notification(struct pm860x_charger_info *info)
 282{
 283        dev_dbg(info->dev, "Power-off notification!\n");
 284}
 285
 286static 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
 393static 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);
 418out:
 419        return IRQ_HANDLED;
 420}
 421
 422static 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);
 448out:
 449        return IRQ_HANDLED;
 450}
 451
 452static 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
 465static 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
 505out:
 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
 513static 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
 533static 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 occure\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 occure,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);
 579out:
 580        return IRQ_HANDLED;
 581}
 582
 583static 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
 607static enum power_supply_property pm860x_usb_props[] = {
 608        POWER_SUPPLY_PROP_STATUS,
 609        POWER_SUPPLY_PROP_ONLINE,
 610};
 611
 612static 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
 635static 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
 648static 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
 713out_irq:
 714        while (--i >= 0)
 715                free_irq(info->irq[i], info);
 716out:
 717        return ret;
 718}
 719
 720static 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
 732static 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};
 740module_platform_driver(pm860x_charger_driver);
 741
 742MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
 743MODULE_LICENSE("GPL");
 744
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