drivers/power/supply/axp288_fuel_gauge.c

   1 /*
   2  * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
   3  *
   4  * Copyright (C) 2014 Intel Corporation
   5  *
   6  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   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 as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15  * General Public License for more details.
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/device.h>
  22 #include <linux/regmap.h>
  23 #include <linux/jiffies.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/workqueue.h>
  26 #include <linux/mfd/axp20x.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/power_supply.h>
  29 #include <linux/iio/consumer.h>
  30 #include <linux/debugfs.h>
  31 #include <linux/seq_file.h>
  32 #include <asm/unaligned.h>
  33
  34 #define CHRG_STAT_BAT_SAFE_MODE         (1 << 3)
  35 #define CHRG_STAT_BAT_VALID                     (1 << 4)
  36 #define CHRG_STAT_BAT_PRESENT           (1 << 5)
  37 #define CHRG_STAT_CHARGING                      (1 << 6)
  38 #define CHRG_STAT_PMIC_OTP                      (1 << 7)
  39
  40 #define CHRG_CCCV_CC_MASK                       0xf     /* 4 bits */
  41 #define CHRG_CCCV_CC_BIT_POS            0
  42 #define CHRG_CCCV_CC_OFFSET                     200     /* 200mA */
  43 #define CHRG_CCCV_CC_LSB_RES            200     /* 200mA */
  44 #define CHRG_CCCV_ITERM_20P                     (1 << 4)    /* 20% of CC */
  45 #define CHRG_CCCV_CV_MASK                       0x60        /* 2 bits */
  46 #define CHRG_CCCV_CV_BIT_POS            5
  47 #define CHRG_CCCV_CV_4100MV                     0x0     /* 4.10V */
  48 #define CHRG_CCCV_CV_4150MV                     0x1     /* 4.15V */
  49 #define CHRG_CCCV_CV_4200MV                     0x2     /* 4.20V */
  50 #define CHRG_CCCV_CV_4350MV                     0x3     /* 4.35V */
  51 #define CHRG_CCCV_CHG_EN                        (1 << 7)
  52
  53 #define CV_4100                                         4100    /* 4100mV */
  54 #define CV_4150                                         4150    /* 4150mV */
  55 #define CV_4200                                         4200    /* 4200mV */
  56 #define CV_4350                                         4350    /* 4350mV */
  57
  58 #define TEMP_IRQ_CFG_QWBTU                      (1 << 0)
  59 #define TEMP_IRQ_CFG_WBTU                       (1 << 1)
  60 #define TEMP_IRQ_CFG_QWBTO                      (1 << 2)
  61 #define TEMP_IRQ_CFG_WBTO                       (1 << 3)
  62 #define TEMP_IRQ_CFG_MASK                       0xf
  63
  64 #define FG_IRQ_CFG_LOWBATT_WL2          (1 << 0)
  65 #define FG_IRQ_CFG_LOWBATT_WL1          (1 << 1)
  66 #define FG_IRQ_CFG_LOWBATT_MASK         0x3
  67 #define LOWBAT_IRQ_STAT_LOWBATT_WL2     (1 << 0)
  68 #define LOWBAT_IRQ_STAT_LOWBATT_WL1     (1 << 1)
  69
  70 #define FG_CNTL_OCV_ADJ_STAT            (1 << 2)
  71 #define FG_CNTL_OCV_ADJ_EN                      (1 << 3)
  72 #define FG_CNTL_CAP_ADJ_STAT            (1 << 4)
  73 #define FG_CNTL_CAP_ADJ_EN                      (1 << 5)
  74 #define FG_CNTL_CC_EN                           (1 << 6)
  75 #define FG_CNTL_GAUGE_EN                        (1 << 7)
  76
  77 #define FG_15BIT_WORD_VALID                     (1 << 15)
  78 #define FG_15BIT_VAL_MASK                       0x7fff
  79
  80 #define FG_REP_CAP_VALID                        (1 << 7)
  81 #define FG_REP_CAP_VAL_MASK                     0x7F
  82
  83 #define FG_DES_CAP1_VALID                       (1 << 7)
  84 #define FG_DES_CAP_RES_LSB                      1456    /* 1.456mAhr */
  85
  86 #define FG_DES_CC_RES_LSB                       1456    /* 1.456mAhr */
  87
  88 #define FG_OCV_CAP_VALID                        (1 << 7)
  89 #define FG_OCV_CAP_VAL_MASK                     0x7F
  90 #define FG_CC_CAP_VALID                         (1 << 7)
  91 #define FG_CC_CAP_VAL_MASK                      0x7F
  92
  93 #define FG_LOW_CAP_THR1_MASK            0xf0    /* 5% tp 20% */
  94 #define FG_LOW_CAP_THR1_VAL                     0xa0    /* 15 perc */
  95 #define FG_LOW_CAP_THR2_MASK            0x0f    /* 0% to 15% */
  96 #define FG_LOW_CAP_WARN_THR                     14  /* 14 perc */
  97 #define FG_LOW_CAP_CRIT_THR                     4   /* 4 perc */
  98 #define FG_LOW_CAP_SHDN_THR                     0   /* 0 perc */
  99
 100 #define STATUS_MON_DELAY_JIFFIES    (HZ * 60)   /*60 sec */
 101 #define NR_RETRY_CNT    3
 102 #define DEV_NAME        "axp288_fuel_gauge"
 103
 104 /* 1.1mV per LSB expressed in uV */
 105 #define VOLTAGE_FROM_ADC(a)                     ((a * 11) / 10)
 106 /* properties converted to tenths of degrees, uV, uA, uW */
 107 #define PROP_TEMP(a)            ((a) * 10)
 108 #define UNPROP_TEMP(a)          ((a) / 10)
 109 #define PROP_VOLT(a)            ((a) * 1000)
 110 #define PROP_CURR(a)            ((a) * 1000)
 111
 112 #define AXP288_FG_INTR_NUM      6
 113 enum {
 114         QWBTU_IRQ = 0,
 115         WBTU_IRQ,
 116         QWBTO_IRQ,
 117         WBTO_IRQ,
 118         WL2_IRQ,
 119         WL1_IRQ,
 120 };
 121
 122 struct axp288_fg_info {
 123         struct platform_device *pdev;
 124         struct axp20x_fg_pdata *pdata;
 125         struct regmap *regmap;
 126         struct regmap_irq_chip_data *regmap_irqc;
 127         int irq[AXP288_FG_INTR_NUM];
 128         struct power_supply *bat;
 129         struct mutex lock;
 130         int status;
 131         struct delayed_work status_monitor;
 132         struct dentry *debug_file;
 133 };
 134
 135 static enum power_supply_property fuel_gauge_props[] = {
 136         POWER_SUPPLY_PROP_STATUS,
 137         POWER_SUPPLY_PROP_PRESENT,
 138         POWER_SUPPLY_PROP_HEALTH,
 139         POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 140         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 141         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 142         POWER_SUPPLY_PROP_VOLTAGE_OCV,
 143         POWER_SUPPLY_PROP_CURRENT_NOW,
 144         POWER_SUPPLY_PROP_CAPACITY,
 145         POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
 146         POWER_SUPPLY_PROP_TEMP,
 147         POWER_SUPPLY_PROP_TEMP_MAX,
 148         POWER_SUPPLY_PROP_TEMP_MIN,
 149         POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
 150         POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
 151         POWER_SUPPLY_PROP_TECHNOLOGY,
 152         POWER_SUPPLY_PROP_CHARGE_FULL,
 153         POWER_SUPPLY_PROP_CHARGE_NOW,
 154         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 155         POWER_SUPPLY_PROP_MODEL_NAME,
 156 };
 157
 158 static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
 159 {
 160         int ret, i;
 161         unsigned int val;
 162
 163         for (i = 0; i < NR_RETRY_CNT; i++) {
 164                 ret = regmap_read(info->regmap, reg, &val);
 165                 if (ret == -EBUSY)
 166                         continue;
 167                 else
 168                         break;
 169         }
 170
 171         if (ret < 0) {
 172                 dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
 173                 return ret;
 174         }
 175
 176         return val;
 177 }
 178
 179 static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
 180 {
 181         int ret;
 182
 183         ret = regmap_write(info->regmap, reg, (unsigned int)val);
 184
 185         if (ret < 0)
 186                 dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret);
 187
 188         return ret;
 189 }
 190
 191 static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg)
 192 {
 193         unsigned char buf[2];
 194         int ret;
 195
 196         ret = regmap_bulk_read(info->regmap, reg, buf, 2);
 197         if (ret < 0) {
 198                 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
 199                         reg, ret);
 200                 return ret;
 201         }
 202
 203         ret = get_unaligned_be16(buf);
 204         if (!(ret & FG_15BIT_WORD_VALID)) {
 205                 dev_err(&info->pdev->dev, "Error reg 0x%02x contents not valid\n",
 206                         reg);
 207                 return -ENXIO;
 208         }
 209
 210         return ret & FG_15BIT_VAL_MASK;
 211 }
 212
 213 static int pmic_read_adc_val(const char *name, int *raw_val,
 214                 struct axp288_fg_info *info)
 215 {
 216         int ret, val = 0;
 217         struct iio_channel *indio_chan;
 218
 219         indio_chan = iio_channel_get(NULL, name);
 220         if (IS_ERR_OR_NULL(indio_chan)) {
 221                 ret = PTR_ERR(indio_chan);
 222                 goto exit;
 223         }
 224         ret = iio_read_channel_raw(indio_chan, &val);
 225         if (ret < 0) {
 226                 dev_err(&info->pdev->dev,
 227                         "IIO channel read error: %x, %x\n", ret, val);
 228                 goto err_exit;
 229         }
 230
 231         dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val);
 232         *raw_val = val;
 233
 234 err_exit:
 235         iio_channel_release(indio_chan);
 236 exit:
 237         return ret;
 238 }
 239
 240 #ifdef CONFIG_DEBUG_FS
 241 static int fuel_gauge_debug_show(struct seq_file *s, void *data)
 242 {
 243         struct axp288_fg_info *info = s->private;
 244         int raw_val, ret;
 245
 246         seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
 247                 AXP20X_PWR_INPUT_STATUS,
 248                 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
 249         seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
 250                 AXP20X_PWR_OP_MODE,
 251                 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
 252         seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
 253                 AXP20X_CHRG_CTRL1,
 254                 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
 255         seq_printf(s, "       VLTF[%02x] : %02x\n",
 256                 AXP20X_V_LTF_DISCHRG,
 257                 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
 258         seq_printf(s, "       VHTF[%02x] : %02x\n",
 259                 AXP20X_V_HTF_DISCHRG,
 260                 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
 261         seq_printf(s, "    CC_CTRL[%02x] : %02x\n",
 262                 AXP20X_CC_CTRL,
 263                 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
 264         seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
 265                 AXP20X_FG_RES,
 266                 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
 267         seq_printf(s, "    FG_RDC1[%02x] : %02x\n",
 268                 AXP288_FG_RDC1_REG,
 269                 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
 270         seq_printf(s, "    FG_RDC0[%02x] : %02x\n",
 271                 AXP288_FG_RDC0_REG,
 272                 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
 273         seq_printf(s, "    FG_OCVH[%02x] : %02x\n",
 274                 AXP288_FG_OCVH_REG,
 275                 fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG));
 276         seq_printf(s, "    FG_OCVL[%02x] : %02x\n",
 277                 AXP288_FG_OCVL_REG,
 278                 fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG));
 279         seq_printf(s, " FG_DES_CAP[%02x] : %04x\n",
 280                 AXP288_FG_DES_CAP1_REG,
 281                 fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG));
 282         seq_printf(s, "  FG_CC_MTR[%02x] : %04x\n",
 283                 AXP288_FG_CC_MTR1_REG,
 284                 fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG));
 285         seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
 286                 AXP288_FG_OCV_CAP_REG,
 287                 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
 288         seq_printf(s, "  FG_CC_CAP[%02x] : %02x\n",
 289                 AXP288_FG_CC_CAP_REG,
 290                 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
 291         seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
 292                 AXP288_FG_LOW_CAP_REG,
 293                 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
 294         seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
 295                 AXP288_FG_TUNE0,
 296                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
 297         seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
 298                 AXP288_FG_TUNE1,
 299                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
 300         seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
 301                 AXP288_FG_TUNE2,
 302                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
 303         seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
 304                 AXP288_FG_TUNE3,
 305                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
 306         seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
 307                 AXP288_FG_TUNE4,
 308                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
 309         seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
 310                 AXP288_FG_TUNE5,
 311                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
 312
 313         ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
 314         if (ret >= 0)
 315                 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
 316         ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info);
 317         if (ret >= 0)
 318                 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
 319         ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info);
 320         if (ret >= 0)
 321                 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
 322         ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info);
 323         if (ret >= 0)
 324                 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
 325         ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info);
 326         if (ret >= 0)
 327                 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
 328         ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
 329         if (ret >= 0)
 330                 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
 331
 332         return 0;
 333 }
 334
 335 static int debug_open(struct inode *inode, struct file *file)
 336 {
 337         return single_open(file, fuel_gauge_debug_show, inode->i_private);
 338 }
 339
 340 static const struct file_operations fg_debug_fops = {
 341         .open       = debug_open,
 342         .read       = seq_read,
 343         .llseek     = seq_lseek,
 344         .release    = single_release,
 345 };
 346
 347 static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
 348 {
 349         info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
 350                 info, &fg_debug_fops);
 351 }
 352
 353 static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
 354 {
 355         debugfs_remove(info->debug_file);
 356 }
 357 #else
 358 static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
 359 {
 360 }
 361 static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
 362 {
 363 }
 364 #endif
 365
 366 static void fuel_gauge_get_status(struct axp288_fg_info *info)
 367 {
 368         int pwr_stat, ret;
 369         int charge, discharge;
 370
 371         pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
 372         if (pwr_stat < 0) {
 373                 dev_err(&info->pdev->dev,
 374                         "PWR STAT read failed:%d\n", pwr_stat);
 375                 return;
 376         }
 377         ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
 378         if (ret < 0) {
 379                 dev_err(&info->pdev->dev,
 380                         "ADC charge current read failed:%d\n", ret);
 381                 return;
 382         }
 383         ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
 384         if (ret < 0) {
 385                 dev_err(&info->pdev->dev,
 386                         "ADC discharge current read failed:%d\n", ret);
 387                 return;
 388         }
 389
 390         if (charge > 0)
 391                 info->status = POWER_SUPPLY_STATUS_CHARGING;
 392         else if (discharge > 0)
 393                 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
 394         else {
 395                 if (pwr_stat & CHRG_STAT_BAT_PRESENT)
 396                         info->status = POWER_SUPPLY_STATUS_FULL;
 397                 else
 398                         info->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
 399         }
 400 }
 401
 402 static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
 403 {
 404         int ret = 0, raw_val;
 405
 406         ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
 407         if (ret < 0)
 408                 goto vbatt_read_fail;
 409
 410         *vbatt = VOLTAGE_FROM_ADC(raw_val);
 411 vbatt_read_fail:
 412         return ret;
 413 }
 414
 415 static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
 416 {
 417         int ret, value = 0;
 418         int charge, discharge;
 419
 420         ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
 421         if (ret < 0)
 422                 goto current_read_fail;
 423         ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
 424         if (ret < 0)
 425                 goto current_read_fail;
 426
 427         if (charge > 0)
 428                 value = charge;
 429         else if (discharge > 0)
 430                 value = -1 * discharge;
 431
 432         *cur = value;
 433 current_read_fail:
 434         return ret;
 435 }
 436
 437 static int temp_to_adc(struct axp288_fg_info *info, int tval)
 438 {
 439         int rntc = 0, i, ret, adc_val;
 440         int rmin, rmax, tmin, tmax;
 441         int tcsz = info->pdata->tcsz;
 442
 443         /* get the Rntc resitance value for this temp */
 444         if (tval > info->pdata->thermistor_curve[0][1]) {
 445                 rntc = info->pdata->thermistor_curve[0][0];
 446         } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) {
 447                 rntc = info->pdata->thermistor_curve[tcsz-1][0];
 448         } else {
 449                 for (i = 1; i < tcsz; i++) {
 450                         if (tval > info->pdata->thermistor_curve[i][1]) {
 451                                 rmin = info->pdata->thermistor_curve[i-1][0];
 452                                 rmax = info->pdata->thermistor_curve[i][0];
 453                                 tmin = info->pdata->thermistor_curve[i-1][1];
 454                                 tmax = info->pdata->thermistor_curve[i][1];
 455                                 rntc = rmin + ((rmax - rmin) *
 456                                         (tval - tmin) / (tmax - tmin));
 457                                 break;
 458                         }
 459                 }
 460         }
 461
 462         /* we need the current to calculate the proper adc voltage */
 463         ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
 464         if (ret < 0) {
 465                 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
 466                 ret = 0x30;
 467         }
 468
 469         /*
 470          * temperature is proportional to NTS thermistor resistance
 471          * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
 472          * [12-bit ADC VAL] = R_NTC(Ω) * current / 800
 473          */
 474         adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800;
 475
 476         return adc_val;
 477 }
 478
 479 static int adc_to_temp(struct axp288_fg_info *info, int adc_val)
 480 {
 481         int ret, r, i, tval = 0;
 482         int rmin, rmax, tmin, tmax;
 483         int tcsz = info->pdata->tcsz;
 484
 485         ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
 486         if (ret < 0) {
 487                 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
 488                 ret = 0x30;
 489         }
 490
 491         /*
 492          * temperature is proportional to NTS thermistor resistance
 493          * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
 494          * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current
 495          */
 496         r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3)));
 497
 498         if (r < info->pdata->thermistor_curve[0][0]) {
 499                 tval = info->pdata->thermistor_curve[0][1];
 500         } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) {
 501                 tval = info->pdata->thermistor_curve[tcsz-1][1];
 502         } else {
 503                 for (i = 1; i < tcsz; i++) {
 504                         if (r < info->pdata->thermistor_curve[i][0]) {
 505                                 rmin = info->pdata->thermistor_curve[i-1][0];
 506                                 rmax = info->pdata->thermistor_curve[i][0];
 507                                 tmin = info->pdata->thermistor_curve[i-1][1];
 508                                 tmax = info->pdata->thermistor_curve[i][1];
 509                                 tval = tmin + ((tmax - tmin) *
 510                                         (r - rmin) / (rmax - rmin));
 511                                 break;
 512                         }
 513                 }
 514         }
 515
 516         return tval;
 517 }
 518
 519 static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp)
 520 {
 521         int ret, raw_val = 0;
 522
 523         ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
 524         if (ret < 0)
 525                 goto temp_read_fail;
 526
 527         *btemp = adc_to_temp(info, raw_val);
 528
 529 temp_read_fail:
 530         return ret;
 531 }
 532
 533 static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
 534 {
 535         int ret, value;
 536
 537         /* 12-bit data value, upper 8 in OCVH, lower 4 in OCVL */
 538         ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG);
 539         if (ret < 0)
 540                 goto vocv_read_fail;
 541         value = ret << 4;
 542
 543         ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG);
 544         if (ret < 0)
 545                 goto vocv_read_fail;
 546         value |= (ret & 0xf);
 547
 548         *vocv = VOLTAGE_FROM_ADC(value);
 549 vocv_read_fail:
 550         return ret;
 551 }
 552
 553 static int fuel_gauge_battery_health(struct axp288_fg_info *info)
 554 {
 555         int temp, vocv;
 556         int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN;
 557
 558         ret = fuel_gauge_get_btemp(info, &temp);
 559         if (ret < 0)
 560                 goto health_read_fail;
 561
 562         ret = fuel_gauge_get_vocv(info, &vocv);
 563         if (ret < 0)
 564                 goto health_read_fail;
 565
 566         if (vocv > info->pdata->max_volt)
 567                 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 568         else if (temp > info->pdata->max_temp)
 569                 health = POWER_SUPPLY_HEALTH_OVERHEAT;
 570         else if (temp < info->pdata->min_temp)
 571                 health = POWER_SUPPLY_HEALTH_COLD;
 572         else if (vocv < info->pdata->min_volt)
 573                 health = POWER_SUPPLY_HEALTH_DEAD;
 574         else
 575                 health = POWER_SUPPLY_HEALTH_GOOD;
 576
 577 health_read_fail:
 578         return health;
 579 }
 580
 581 static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info)
 582 {
 583         int ret, adc_val;
 584
 585         /* program temperature threshold as 1/16 ADC value */
 586         adc_val = temp_to_adc(info, info->pdata->max_temp);
 587         ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4);
 588
 589         return ret;
 590 }
 591
 592 static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info)
 593 {
 594         int ret, adc_val;
 595
 596         /* program temperature threshold as 1/16 ADC value */
 597         adc_val = temp_to_adc(info, info->pdata->min_temp);
 598         ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4);
 599
 600         return ret;
 601 }
 602
 603 static int fuel_gauge_get_property(struct power_supply *ps,
 604                 enum power_supply_property prop,
 605                 union power_supply_propval *val)
 606 {
 607         struct axp288_fg_info *info = power_supply_get_drvdata(ps);
 608         int ret = 0, value;
 609
 610         mutex_lock(&info->lock);
 611         switch (prop) {
 612         case POWER_SUPPLY_PROP_STATUS:
 613                 fuel_gauge_get_status(info);
 614                 val->intval = info->status;
 615                 break;
 616         case POWER_SUPPLY_PROP_HEALTH:
 617                 val->intval = fuel_gauge_battery_health(info);
 618                 break;
 619         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 620                 ret = fuel_gauge_get_vbatt(info, &value);
 621                 if (ret < 0)
 622                         goto fuel_gauge_read_err;
 623                 val->intval = PROP_VOLT(value);
 624                 break;
 625         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 626                 ret = fuel_gauge_get_vocv(info, &value);
 627                 if (ret < 0)
 628                         goto fuel_gauge_read_err;
 629                 val->intval = PROP_VOLT(value);
 630                 break;
 631         case POWER_SUPPLY_PROP_CURRENT_NOW:
 632                 ret = fuel_gauge_get_current(info, &value);
 633                 if (ret < 0)
 634                         goto fuel_gauge_read_err;
 635                 val->intval = PROP_CURR(value);
 636                 break;
 637         case POWER_SUPPLY_PROP_PRESENT:
 638                 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
 639                 if (ret < 0)
 640                         goto fuel_gauge_read_err;
 641
 642                 if (ret & CHRG_STAT_BAT_PRESENT)
 643                         val->intval = 1;
 644                 else
 645                         val->intval = 0;
 646                 break;
 647         case POWER_SUPPLY_PROP_CAPACITY:
 648                 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
 649                 if (ret < 0)
 650                         goto fuel_gauge_read_err;
 651
 652                 if (!(ret & FG_REP_CAP_VALID))
 653                         dev_err(&info->pdev->dev,
 654                                 "capacity measurement not valid\n");
 655                 val->intval = (ret & FG_REP_CAP_VAL_MASK);
 656                 break;
 657         case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
 658                 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
 659                 if (ret < 0)
 660                         goto fuel_gauge_read_err;
 661                 val->intval = (ret & 0x0f);
 662                 break;
 663         case POWER_SUPPLY_PROP_TEMP:
 664                 ret = fuel_gauge_get_btemp(info, &value);
 665                 if (ret < 0)
 666                         goto fuel_gauge_read_err;
 667                 val->intval = PROP_TEMP(value);
 668                 break;
 669         case POWER_SUPPLY_PROP_TEMP_MAX:
 670         case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
 671                 val->intval = PROP_TEMP(info->pdata->max_temp);
 672                 break;
 673         case POWER_SUPPLY_PROP_TEMP_MIN:
 674         case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
 675                 val->intval = PROP_TEMP(info->pdata->min_temp);
 676                 break;
 677         case POWER_SUPPLY_PROP_TECHNOLOGY:
 678                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
 679                 break;
 680         case POWER_SUPPLY_PROP_CHARGE_NOW:
 681                 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG);
 682                 if (ret < 0)
 683                         goto fuel_gauge_read_err;
 684
 685                 val->intval = ret * FG_DES_CAP_RES_LSB;
 686                 break;
 687         case POWER_SUPPLY_PROP_CHARGE_FULL:
 688                 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG);
 689                 if (ret < 0)
 690                         goto fuel_gauge_read_err;
 691
 692                 val->intval = ret * FG_DES_CAP_RES_LSB;
 693                 break;
 694         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 695                 val->intval = PROP_CURR(info->pdata->design_cap);
 696                 break;
 697         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 698                 val->intval = PROP_VOLT(info->pdata->max_volt);
 699                 break;
 700         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 701                 val->intval = PROP_VOLT(info->pdata->min_volt);
 702                 break;
 703         case POWER_SUPPLY_PROP_MODEL_NAME:
 704                 val->strval = info->pdata->battid;
 705                 break;
 706         default:
 707                 mutex_unlock(&info->lock);
 708                 return -EINVAL;
 709         }
 710
 711         mutex_unlock(&info->lock);
 712         return 0;
 713
 714 fuel_gauge_read_err:
 715         mutex_unlock(&info->lock);
 716         return ret;
 717 }
 718
 719 static int fuel_gauge_set_property(struct power_supply *ps,
 720                 enum power_supply_property prop,
 721                 const union power_supply_propval *val)
 722 {
 723         struct axp288_fg_info *info = power_supply_get_drvdata(ps);
 724         int ret = 0;
 725
 726         mutex_lock(&info->lock);
 727         switch (prop) {
 728         case POWER_SUPPLY_PROP_STATUS:
 729                 info->status = val->intval;
 730                 break;
 731         case POWER_SUPPLY_PROP_TEMP_MIN:
 732         case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
 733                 if ((val->intval < PD_DEF_MIN_TEMP) ||
 734                         (val->intval > PD_DEF_MAX_TEMP)) {
 735                         ret = -EINVAL;
 736                         break;
 737                 }
 738                 info->pdata->min_temp = UNPROP_TEMP(val->intval);
 739                 ret = fuel_gauge_set_low_btemp_alert(info);
 740                 if (ret < 0)
 741                         dev_err(&info->pdev->dev,
 742                                 "temp alert min set fail:%d\n", ret);
 743                 break;
 744         case POWER_SUPPLY_PROP_TEMP_MAX:
 745         case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
 746                 if ((val->intval < PD_DEF_MIN_TEMP) ||
 747                         (val->intval > PD_DEF_MAX_TEMP)) {
 748                         ret = -EINVAL;
 749                         break;
 750                 }
 751                 info->pdata->max_temp = UNPROP_TEMP(val->intval);
 752                 ret = fuel_gauge_set_high_btemp_alert(info);
 753                 if (ret < 0)
 754                         dev_err(&info->pdev->dev,
 755                                 "temp alert max set fail:%d\n", ret);
 756                 break;
 757         case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
 758                 if ((val->intval < 0) || (val->intval > 15)) {
 759                         ret = -EINVAL;
 760                         break;
 761                 }
 762                 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
 763                 if (ret < 0)
 764                         break;
 765                 ret &= 0xf0;
 766                 ret |= (val->intval & 0xf);
 767                 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
 768                 break;
 769         default:
 770                 ret = -EINVAL;
 771                 break;
 772         }
 773
 774         mutex_unlock(&info->lock);
 775         return ret;
 776 }
 777
 778 static int fuel_gauge_property_is_writeable(struct power_supply *psy,
 779         enum power_supply_property psp)
 780 {
 781         int ret;
 782
 783         switch (psp) {
 784         case POWER_SUPPLY_PROP_STATUS:
 785         case POWER_SUPPLY_PROP_TEMP_MIN:
 786         case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
 787         case POWER_SUPPLY_PROP_TEMP_MAX:
 788         case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
 789         case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
 790                 ret = 1;
 791                 break;
 792         default:
 793                 ret = 0;
 794         }
 795
 796         return ret;
 797 }
 798
 799 static void fuel_gauge_status_monitor(struct work_struct *work)
 800 {
 801         struct axp288_fg_info *info = container_of(work,
 802                 struct axp288_fg_info, status_monitor.work);
 803
 804         fuel_gauge_get_status(info);
 805         power_supply_changed(info->bat);
 806         schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
 807 }
 808
 809 static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
 810 {
 811         struct axp288_fg_info *info = dev;
 812         int i;
 813
 814         for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
 815                 if (info->irq[i] == irq)
 816                         break;
 817         }
 818
 819         if (i >= AXP288_FG_INTR_NUM) {
 820                 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
 821                 return IRQ_NONE;
 822         }
 823
 824         switch (i) {
 825         case QWBTU_IRQ:
 826                 dev_info(&info->pdev->dev,
 827                         "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
 828                 break;
 829         case WBTU_IRQ:
 830                 dev_info(&info->pdev->dev,
 831                         "Battery under temperature in work mode IRQ (WBTU)\n");
 832                 break;
 833         case QWBTO_IRQ:
 834                 dev_info(&info->pdev->dev,
 835                         "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
 836                 break;
 837         case WBTO_IRQ:
 838                 dev_info(&info->pdev->dev,
 839                         "Battery over temperature in work mode IRQ (WBTO)\n");
 840                 break;
 841         case WL2_IRQ:
 842                 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
 843                 break;
 844         case WL1_IRQ:
 845                 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
 846                 break;
 847         default:
 848                 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
 849         }
 850
 851         power_supply_changed(info->bat);
 852         return IRQ_HANDLED;
 853 }
 854
 855 static void fuel_gauge_external_power_changed(struct power_supply *psy)
 856 {
 857         struct axp288_fg_info *info = power_supply_get_drvdata(psy);
 858
 859         power_supply_changed(info->bat);
 860 }
 861
 862 static const struct power_supply_desc fuel_gauge_desc = {
 863         .name                   = DEV_NAME,
 864         .type                   = POWER_SUPPLY_TYPE_BATTERY,
 865         .properties             = fuel_gauge_props,
 866         .num_properties         = ARRAY_SIZE(fuel_gauge_props),
 867         .get_property           = fuel_gauge_get_property,
 868         .set_property           = fuel_gauge_set_property,
 869         .property_is_writeable  = fuel_gauge_property_is_writeable,
 870         .external_power_changed = fuel_gauge_external_power_changed,
 871 };
 872
 873 static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info)
 874 {
 875         int ret;
 876         u8 reg_val;
 877
 878         ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
 879         if (ret < 0) {
 880                 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
 881                 return ret;
 882         }
 883         ret = (ret & FG_REP_CAP_VAL_MASK);
 884
 885         if (ret > FG_LOW_CAP_WARN_THR)
 886                 reg_val = FG_LOW_CAP_WARN_THR;
 887         else if (ret > FG_LOW_CAP_CRIT_THR)
 888                 reg_val = FG_LOW_CAP_CRIT_THR;
 889         else
 890                 reg_val = FG_LOW_CAP_SHDN_THR;
 891
 892         reg_val |= FG_LOW_CAP_THR1_VAL;
 893         ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val);
 894         if (ret < 0)
 895                 dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret);
 896
 897         return ret;
 898 }
 899
 900 static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info)
 901 {
 902         int ret;
 903         u8 val;
 904
 905         ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
 906         if (ret < 0)
 907                 goto fg_prog_ocv_fail;
 908         else
 909                 val = (ret & ~CHRG_CCCV_CV_MASK);
 910
 911         switch (info->pdata->max_volt) {
 912         case CV_4100:
 913                 val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS);
 914                 break;
 915         case CV_4150:
 916                 val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS);
 917                 break;
 918         case CV_4200:
 919                 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
 920                 break;
 921         case CV_4350:
 922                 val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS);
 923                 break;
 924         default:
 925                 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
 926                 break;
 927         }
 928
 929         ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val);
 930 fg_prog_ocv_fail:
 931         return ret;
 932 }
 933
 934 static int fuel_gauge_program_design_cap(struct axp288_fg_info *info)
 935 {
 936         int ret;
 937
 938         ret = fuel_gauge_reg_writeb(info,
 939                 AXP288_FG_DES_CAP1_REG, info->pdata->cap1);
 940         if (ret < 0)
 941                 goto fg_prog_descap_fail;
 942
 943         ret = fuel_gauge_reg_writeb(info,
 944                 AXP288_FG_DES_CAP0_REG, info->pdata->cap0);
 945
 946 fg_prog_descap_fail:
 947         return ret;
 948 }
 949
 950 static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info)
 951 {
 952         int ret = 0, i;
 953
 954         for (i = 0; i < OCV_CURVE_SIZE; i++) {
 955                 ret = fuel_gauge_reg_writeb(info,
 956                         AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]);
 957                 if (ret < 0)
 958                         goto fg_prog_ocv_fail;
 959         }
 960
 961 fg_prog_ocv_fail:
 962         return ret;
 963 }
 964
 965 static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info)
 966 {
 967         int ret;
 968
 969         ret = fuel_gauge_reg_writeb(info,
 970                 AXP288_FG_RDC1_REG, info->pdata->rdc1);
 971         if (ret < 0)
 972                 goto fg_prog_ocv_fail;
 973
 974         ret = fuel_gauge_reg_writeb(info,
 975                 AXP288_FG_RDC0_REG, info->pdata->rdc0);
 976
 977 fg_prog_ocv_fail:
 978         return ret;
 979 }
 980
 981 static void fuel_gauge_init_config_regs(struct axp288_fg_info *info)
 982 {
 983         int ret;
 984
 985         /*
 986          * check if the config data is already
 987          * programmed and if so just return.
 988          */
 989
 990         ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
 991         if (ret < 0) {
 992                 dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n");
 993         } else if (!(ret & FG_DES_CAP1_VALID)) {
 994                 dev_info(&info->pdev->dev, "FG data needs to be initialized\n");
 995         } else {
 996                 dev_info(&info->pdev->dev, "FG data is already initialized\n");
 997                 return;
 998         }
 999
1000         ret = fuel_gauge_program_vbatt_full(info);
1001         if (ret < 0)
1002                 dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret);
1003
1004         ret = fuel_gauge_program_design_cap(info);
1005         if (ret < 0)
1006                 dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret);
1007
1008         ret = fuel_gauge_program_rdc_vals(info);
1009         if (ret < 0)
1010                 dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret);
1011
1012         ret = fuel_gauge_program_ocv_curve(info);
1013         if (ret < 0)
1014                 dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret);
1015
1016         ret = fuel_gauge_set_lowbatt_thresholds(info);
1017         if (ret < 0)
1018                 dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret);
1019
1020         ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef);
1021         if (ret < 0)
1022                 dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret);
1023 }
1024
1025 static void fuel_gauge_init_irq(struct axp288_fg_info *info)
1026 {
1027         int ret, i, pirq;
1028
1029         for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
1030                 pirq = platform_get_irq(info->pdev, i);
1031                 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
1032                 if (info->irq[i] < 0) {
1033                         dev_warn(&info->pdev->dev,
1034                                 "regmap_irq get virq failed for IRQ %d: %d\n",
1035                                 pirq, info->irq[i]);
1036                         info->irq[i] = -1;
1037                         goto intr_failed;
1038                 }
1039                 ret = request_threaded_irq(info->irq[i],
1040                                 NULL, fuel_gauge_thread_handler,
1041                                 IRQF_ONESHOT, DEV_NAME, info);
1042                 if (ret) {
1043                         dev_warn(&info->pdev->dev,
1044                                 "request irq failed for IRQ %d: %d\n",
1045                                 pirq, info->irq[i]);
1046                         info->irq[i] = -1;
1047                         goto intr_failed;
1048                 } else {
1049                         dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
1050                                 pirq, info->irq[i]);
1051                 }
1052         }
1053         return;
1054
1055 intr_failed:
1056         for (; i > 0; i--) {
1057                 free_irq(info->irq[i - 1], info);
1058                 info->irq[i - 1] = -1;
1059         }
1060 }
1061
1062 static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info)
1063 {
1064         int ret;
1065         unsigned int val;
1066
1067         ret = fuel_gauge_set_high_btemp_alert(info);
1068         if (ret < 0)
1069                 dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret);
1070
1071         ret = fuel_gauge_set_low_btemp_alert(info);
1072         if (ret < 0)
1073                 dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret);
1074
1075         /* enable interrupts */
1076         val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN);
1077         val |= TEMP_IRQ_CFG_MASK;
1078         fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val);
1079
1080         val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN);
1081         val |= FG_IRQ_CFG_LOWBATT_MASK;
1082         val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val);
1083 }
1084
1085 static int axp288_fuel_gauge_probe(struct platform_device *pdev)
1086 {
1087         int ret = 0;
1088         struct axp288_fg_info *info;
1089         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
1090         struct power_supply_config psy_cfg = {};
1091
1092         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
1093         if (!info)
1094                 return -ENOMEM;
1095
1096         info->pdev = pdev;
1097         info->regmap = axp20x->regmap;
1098         info->regmap_irqc = axp20x->regmap_irqc;
1099         info->status = POWER_SUPPLY_STATUS_UNKNOWN;
1100         info->pdata = pdev->dev.platform_data;
1101         if (!info->pdata)
1102                 return -ENODEV;
1103
1104         platform_set_drvdata(pdev, info);
1105
1106         mutex_init(&info->lock);
1107         INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
1108
1109         psy_cfg.drv_data = info;
1110         info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg);
1111         if (IS_ERR(info->bat)) {
1112                 ret = PTR_ERR(info->bat);
1113                 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
1114                 return ret;
1115         }
1116
1117         fuel_gauge_create_debugfs(info);
1118         fuel_gauge_init_config_regs(info);
1119         fuel_gauge_init_irq(info);
1120         fuel_gauge_init_hw_regs(info);
1121         schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
1122
1123         return ret;
1124 }
1125
1126 static const struct platform_device_id axp288_fg_id_table[] = {
1127         { .name = DEV_NAME },
1128         {},
1129 };
1130 MODULE_DEVICE_TABLE(platform, axp288_fg_id_table);
1131
1132 static int axp288_fuel_gauge_remove(struct platform_device *pdev)
1133 {
1134         struct axp288_fg_info *info = platform_get_drvdata(pdev);
1135         int i;
1136
1137         cancel_delayed_work_sync(&info->status_monitor);
1138         power_supply_unregister(info->bat);
1139         fuel_gauge_remove_debugfs(info);
1140
1141         for (i = 0; i < AXP288_FG_INTR_NUM; i++)
1142                 if (info->irq[i] >= 0)
1143                         free_irq(info->irq[i], info);
1144
1145         return 0;
1146 }
1147
1148 static struct platform_driver axp288_fuel_gauge_driver = {
1149         .probe = axp288_fuel_gauge_probe,
1150         .remove = axp288_fuel_gauge_remove,
1151         .id_table = axp288_fg_id_table,
1152         .driver = {
1153                 .name = DEV_NAME,
1154         },
1155 };
1156
1157 module_platform_driver(axp288_fuel_gauge_driver);
1158
1159 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
1160 MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
1161 MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
1162 MODULE_LICENSE("GPL");