drivers/power/supply/bq25980_charger.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // BQ25980 Battery Charger Driver
   3 // Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
   4
   5 #include <linux/err.h>
   6 #include <linux/i2c.h>
   7 #include <linux/init.h>
   8 #include <linux/interrupt.h>
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/gpio/consumer.h>
  12 #include <linux/power_supply.h>
  13 #include <linux/regmap.h>
  14 #include <linux/types.h>
  15 #include <linux/delay.h>
  16 #include <linux/device.h>
  17 #include <linux/moduleparam.h>
  18 #include <linux/slab.h>
  19
  20 #include "bq25980_charger.h"
  21
  22 struct bq25980_state {
  23         bool dischg;
  24         bool ovp;
  25         bool ocp;
  26         bool wdt;
  27         bool tflt;
  28         bool online;
  29         bool ce;
  30         bool hiz;
  31         bool bypass;
  32
  33         u32 vbat_adc;
  34         u32 vsys_adc;
  35         u32 ibat_adc;
  36 };
  37
  38 enum bq25980_id {
  39         BQ25980,
  40         BQ25975,
  41         BQ25960,
  42 };
  43
  44 struct bq25980_chip_info {
  45
  46         int model_id;
  47
  48         const struct regmap_config *regmap_config;
  49
  50         int busocp_def;
  51         int busocp_sc_max;
  52         int busocp_byp_max;
  53         int busocp_sc_min;
  54         int busocp_byp_min;
  55
  56         int busovp_sc_def;
  57         int busovp_byp_def;
  58         int busovp_sc_step;
  59
  60         int busovp_sc_offset;
  61         int busovp_byp_step;
  62         int busovp_byp_offset;
  63         int busovp_sc_min;
  64         int busovp_sc_max;
  65         int busovp_byp_min;
  66         int busovp_byp_max;
  67
  68         int batovp_def;
  69         int batovp_max;
  70         int batovp_min;
  71         int batovp_step;
  72         int batovp_offset;
  73
  74         int batocp_def;
  75         int batocp_max;
  76 };
  77
  78 struct bq25980_init_data {
  79         u32 ichg;
  80         u32 bypass_ilim;
  81         u32 sc_ilim;
  82         u32 vreg;
  83         u32 iterm;
  84         u32 iprechg;
  85         u32 bypass_vlim;
  86         u32 sc_vlim;
  87         u32 ichg_max;
  88         u32 vreg_max;
  89 };
  90
  91 struct bq25980_device {
  92         struct i2c_client *client;
  93         struct device *dev;
  94         struct power_supply *charger;
  95         struct power_supply *battery;
  96         struct mutex lock;
  97         struct regmap *regmap;
  98
  99         char model_name[I2C_NAME_SIZE];
 100
 101         struct bq25980_init_data init_data;
 102         const struct bq25980_chip_info *chip_info;
 103         struct bq25980_state state;
 104         int watchdog_timer;
 105 };
 106
 107 static struct reg_default bq25980_reg_defs[] = {
 108         {BQ25980_BATOVP, 0x5A},
 109         {BQ25980_BATOVP_ALM, 0x46},
 110         {BQ25980_BATOCP, 0x51},
 111         {BQ25980_BATOCP_ALM, 0x50},
 112         {BQ25980_BATUCP_ALM, 0x28},
 113         {BQ25980_CHRGR_CTRL_1, 0x0},
 114         {BQ25980_BUSOVP, 0x26},
 115         {BQ25980_BUSOVP_ALM, 0x22},
 116         {BQ25980_BUSOCP, 0xD},
 117         {BQ25980_BUSOCP_ALM, 0xC},
 118         {BQ25980_TEMP_CONTROL, 0x30},
 119         {BQ25980_TDIE_ALM, 0xC8},
 120         {BQ25980_TSBUS_FLT, 0x15},
 121         {BQ25980_TSBAT_FLG, 0x15},
 122         {BQ25980_VAC_CONTROL, 0x0},
 123         {BQ25980_CHRGR_CTRL_2, 0x0},
 124         {BQ25980_CHRGR_CTRL_3, 0x20},
 125         {BQ25980_CHRGR_CTRL_4, 0x1D},
 126         {BQ25980_CHRGR_CTRL_5, 0x18},
 127         {BQ25980_STAT1, 0x0},
 128         {BQ25980_STAT2, 0x0},
 129         {BQ25980_STAT3, 0x0},
 130         {BQ25980_STAT4, 0x0},
 131         {BQ25980_STAT5, 0x0},
 132         {BQ25980_FLAG1, 0x0},
 133         {BQ25980_FLAG2, 0x0},
 134         {BQ25980_FLAG3, 0x0},
 135         {BQ25980_FLAG4, 0x0},
 136         {BQ25980_FLAG5, 0x0},
 137         {BQ25980_MASK1, 0x0},
 138         {BQ25980_MASK2, 0x0},
 139         {BQ25980_MASK3, 0x0},
 140         {BQ25980_MASK4, 0x0},
 141         {BQ25980_MASK5, 0x0},
 142         {BQ25980_DEVICE_INFO, 0x8},
 143         {BQ25980_ADC_CONTROL1, 0x0},
 144         {BQ25980_ADC_CONTROL2, 0x0},
 145         {BQ25980_IBUS_ADC_LSB, 0x0},
 146         {BQ25980_IBUS_ADC_MSB, 0x0},
 147         {BQ25980_VBUS_ADC_LSB, 0x0},
 148         {BQ25980_VBUS_ADC_MSB, 0x0},
 149         {BQ25980_VAC1_ADC_LSB, 0x0},
 150         {BQ25980_VAC2_ADC_LSB, 0x0},
 151         {BQ25980_VOUT_ADC_LSB, 0x0},
 152         {BQ25980_VBAT_ADC_LSB, 0x0},
 153         {BQ25980_IBAT_ADC_MSB, 0x0},
 154         {BQ25980_IBAT_ADC_LSB, 0x0},
 155         {BQ25980_TSBUS_ADC_LSB, 0x0},
 156         {BQ25980_TSBAT_ADC_LSB, 0x0},
 157         {BQ25980_TDIE_ADC_LSB, 0x0},
 158         {BQ25980_DEGLITCH_TIME, 0x0},
 159         {BQ25980_CHRGR_CTRL_6, 0x0},
 160 };
 161
 162 static struct reg_default bq25975_reg_defs[] = {
 163         {BQ25980_BATOVP, 0x5A},
 164         {BQ25980_BATOVP_ALM, 0x46},
 165         {BQ25980_BATOCP, 0x51},
 166         {BQ25980_BATOCP_ALM, 0x50},
 167         {BQ25980_BATUCP_ALM, 0x28},
 168         {BQ25980_CHRGR_CTRL_1, 0x0},
 169         {BQ25980_BUSOVP, 0x26},
 170         {BQ25980_BUSOVP_ALM, 0x22},
 171         {BQ25980_BUSOCP, 0xD},
 172         {BQ25980_BUSOCP_ALM, 0xC},
 173         {BQ25980_TEMP_CONTROL, 0x30},
 174         {BQ25980_TDIE_ALM, 0xC8},
 175         {BQ25980_TSBUS_FLT, 0x15},
 176         {BQ25980_TSBAT_FLG, 0x15},
 177         {BQ25980_VAC_CONTROL, 0x0},
 178         {BQ25980_CHRGR_CTRL_2, 0x0},
 179         {BQ25980_CHRGR_CTRL_3, 0x20},
 180         {BQ25980_CHRGR_CTRL_4, 0x1D},
 181         {BQ25980_CHRGR_CTRL_5, 0x18},
 182         {BQ25980_STAT1, 0x0},
 183         {BQ25980_STAT2, 0x0},
 184         {BQ25980_STAT3, 0x0},
 185         {BQ25980_STAT4, 0x0},
 186         {BQ25980_STAT5, 0x0},
 187         {BQ25980_FLAG1, 0x0},
 188         {BQ25980_FLAG2, 0x0},
 189         {BQ25980_FLAG3, 0x0},
 190         {BQ25980_FLAG4, 0x0},
 191         {BQ25980_FLAG5, 0x0},
 192         {BQ25980_MASK1, 0x0},
 193         {BQ25980_MASK2, 0x0},
 194         {BQ25980_MASK3, 0x0},
 195         {BQ25980_MASK4, 0x0},
 196         {BQ25980_MASK5, 0x0},
 197         {BQ25980_DEVICE_INFO, 0x8},
 198         {BQ25980_ADC_CONTROL1, 0x0},
 199         {BQ25980_ADC_CONTROL2, 0x0},
 200         {BQ25980_IBUS_ADC_LSB, 0x0},
 201         {BQ25980_IBUS_ADC_MSB, 0x0},
 202         {BQ25980_VBUS_ADC_LSB, 0x0},
 203         {BQ25980_VBUS_ADC_MSB, 0x0},
 204         {BQ25980_VAC1_ADC_LSB, 0x0},
 205         {BQ25980_VAC2_ADC_LSB, 0x0},
 206         {BQ25980_VOUT_ADC_LSB, 0x0},
 207         {BQ25980_VBAT_ADC_LSB, 0x0},
 208         {BQ25980_IBAT_ADC_MSB, 0x0},
 209         {BQ25980_IBAT_ADC_LSB, 0x0},
 210         {BQ25980_TSBUS_ADC_LSB, 0x0},
 211         {BQ25980_TSBAT_ADC_LSB, 0x0},
 212         {BQ25980_TDIE_ADC_LSB, 0x0},
 213         {BQ25980_DEGLITCH_TIME, 0x0},
 214         {BQ25980_CHRGR_CTRL_6, 0x0},
 215 };
 216
 217 static struct reg_default bq25960_reg_defs[] = {
 218         {BQ25980_BATOVP, 0x5A},
 219         {BQ25980_BATOVP_ALM, 0x46},
 220         {BQ25980_BATOCP, 0x51},
 221         {BQ25980_BATOCP_ALM, 0x50},
 222         {BQ25980_BATUCP_ALM, 0x28},
 223         {BQ25980_CHRGR_CTRL_1, 0x0},
 224         {BQ25980_BUSOVP, 0x26},
 225         {BQ25980_BUSOVP_ALM, 0x22},
 226         {BQ25980_BUSOCP, 0xD},
 227         {BQ25980_BUSOCP_ALM, 0xC},
 228         {BQ25980_TEMP_CONTROL, 0x30},
 229         {BQ25980_TDIE_ALM, 0xC8},
 230         {BQ25980_TSBUS_FLT, 0x15},
 231         {BQ25980_TSBAT_FLG, 0x15},
 232         {BQ25980_VAC_CONTROL, 0x0},
 233         {BQ25980_CHRGR_CTRL_2, 0x0},
 234         {BQ25980_CHRGR_CTRL_3, 0x20},
 235         {BQ25980_CHRGR_CTRL_4, 0x1D},
 236         {BQ25980_CHRGR_CTRL_5, 0x18},
 237         {BQ25980_STAT1, 0x0},
 238         {BQ25980_STAT2, 0x0},
 239         {BQ25980_STAT3, 0x0},
 240         {BQ25980_STAT4, 0x0},
 241         {BQ25980_STAT5, 0x0},
 242         {BQ25980_FLAG1, 0x0},
 243         {BQ25980_FLAG2, 0x0},
 244         {BQ25980_FLAG3, 0x0},
 245         {BQ25980_FLAG4, 0x0},
 246         {BQ25980_FLAG5, 0x0},
 247         {BQ25980_MASK1, 0x0},
 248         {BQ25980_MASK2, 0x0},
 249         {BQ25980_MASK3, 0x0},
 250         {BQ25980_MASK4, 0x0},
 251         {BQ25980_MASK5, 0x0},
 252         {BQ25980_DEVICE_INFO, 0x8},
 253         {BQ25980_ADC_CONTROL1, 0x0},
 254         {BQ25980_ADC_CONTROL2, 0x0},
 255         {BQ25980_IBUS_ADC_LSB, 0x0},
 256         {BQ25980_IBUS_ADC_MSB, 0x0},
 257         {BQ25980_VBUS_ADC_LSB, 0x0},
 258         {BQ25980_VBUS_ADC_MSB, 0x0},
 259         {BQ25980_VAC1_ADC_LSB, 0x0},
 260         {BQ25980_VAC2_ADC_LSB, 0x0},
 261         {BQ25980_VOUT_ADC_LSB, 0x0},
 262         {BQ25980_VBAT_ADC_LSB, 0x0},
 263         {BQ25980_IBAT_ADC_MSB, 0x0},
 264         {BQ25980_IBAT_ADC_LSB, 0x0},
 265         {BQ25980_TSBUS_ADC_LSB, 0x0},
 266         {BQ25980_TSBAT_ADC_LSB, 0x0},
 267         {BQ25980_TDIE_ADC_LSB, 0x0},
 268         {BQ25980_DEGLITCH_TIME, 0x0},
 269         {BQ25980_CHRGR_CTRL_6, 0x0},
 270 };
 271
 272 static int bq25980_watchdog_time[BQ25980_NUM_WD_VAL] = {5000, 10000, 50000,
 273                                                         300000};
 274
 275 static int bq25980_get_input_curr_lim(struct bq25980_device *bq)
 276 {
 277         unsigned int busocp_reg_code;
 278         int ret;
 279
 280         ret = regmap_read(bq->regmap, BQ25980_BUSOCP, &busocp_reg_code);
 281         if (ret)
 282                 return ret;
 283
 284         return (busocp_reg_code * BQ25980_BUSOCP_STEP_uA) + BQ25980_BUSOCP_OFFSET_uA;
 285 }
 286
 287 static int bq25980_set_hiz(struct bq25980_device *bq, int setting)
 288 {
 289         return regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
 290                         BQ25980_EN_HIZ, setting);
 291 }
 292
 293 static int bq25980_set_input_curr_lim(struct bq25980_device *bq, int busocp)
 294 {
 295         unsigned int busocp_reg_code;
 296         int ret;
 297
 298         if (!busocp)
 299                 return bq25980_set_hiz(bq, BQ25980_ENABLE_HIZ);
 300
 301         bq25980_set_hiz(bq, BQ25980_DISABLE_HIZ);
 302
 303         if (busocp < BQ25980_BUSOCP_MIN_uA)
 304                 busocp = BQ25980_BUSOCP_MIN_uA;
 305
 306         if (bq->state.bypass)
 307                 busocp = min(busocp, bq->chip_info->busocp_sc_max);
 308         else
 309                 busocp = min(busocp, bq->chip_info->busocp_byp_max);
 310
 311         busocp_reg_code = (busocp - BQ25980_BUSOCP_OFFSET_uA)
 312                                                 / BQ25980_BUSOCP_STEP_uA;
 313
 314         ret = regmap_write(bq->regmap, BQ25980_BUSOCP, busocp_reg_code);
 315         if (ret)
 316                 return ret;
 317
 318         return regmap_write(bq->regmap, BQ25980_BUSOCP_ALM, busocp_reg_code);
 319 }
 320
 321 static int bq25980_get_input_volt_lim(struct bq25980_device *bq)
 322 {
 323         unsigned int busovp_reg_code;
 324         unsigned int busovp_offset;
 325         unsigned int busovp_step;
 326         int ret;
 327
 328         if (bq->state.bypass) {
 329                 busovp_step = bq->chip_info->busovp_byp_step;
 330                 busovp_offset = bq->chip_info->busovp_byp_offset;
 331         } else {
 332                 busovp_step = bq->chip_info->busovp_sc_step;
 333                 busovp_offset = bq->chip_info->busovp_sc_offset;
 334         }
 335
 336         ret = regmap_read(bq->regmap, BQ25980_BUSOVP, &busovp_reg_code);
 337         if (ret)
 338                 return ret;
 339
 340         return (busovp_reg_code * busovp_step) + busovp_offset;
 341 }
 342
 343 static int bq25980_set_input_volt_lim(struct bq25980_device *bq, int busovp)
 344 {
 345         unsigned int busovp_reg_code;
 346         unsigned int busovp_step;
 347         unsigned int busovp_offset;
 348         int ret;
 349
 350         if (bq->state.bypass) {
 351                 busovp_step = bq->chip_info->busovp_byp_step;
 352                 busovp_offset = bq->chip_info->busovp_byp_offset;
 353                 if (busovp > bq->chip_info->busovp_byp_max)
 354                         busovp = bq->chip_info->busovp_byp_max;
 355                 else if (busovp < bq->chip_info->busovp_byp_min)
 356                         busovp = bq->chip_info->busovp_byp_min;
 357         } else {
 358                 busovp_step = bq->chip_info->busovp_sc_step;
 359                 busovp_offset = bq->chip_info->busovp_sc_offset;
 360                 if (busovp > bq->chip_info->busovp_sc_max)
 361                         busovp = bq->chip_info->busovp_sc_max;
 362                 else if (busovp < bq->chip_info->busovp_sc_min)
 363                         busovp = bq->chip_info->busovp_sc_min;
 364         }
 365
 366         busovp_reg_code = (busovp - busovp_offset) / busovp_step;
 367
 368         ret = regmap_write(bq->regmap, BQ25980_BUSOVP, busovp_reg_code);
 369         if (ret)
 370                 return ret;
 371
 372         return regmap_write(bq->regmap, BQ25980_BUSOVP_ALM, busovp_reg_code);
 373 }
 374
 375 static int bq25980_get_const_charge_curr(struct bq25980_device *bq)
 376 {
 377         unsigned int batocp_reg_code;
 378         int ret;
 379
 380         ret = regmap_read(bq->regmap, BQ25980_BATOCP, &batocp_reg_code);
 381         if (ret)
 382                 return ret;
 383
 384         return (batocp_reg_code & BQ25980_BATOCP_MASK) *
 385                                                 BQ25980_BATOCP_STEP_uA;
 386 }
 387
 388 static int bq25980_set_const_charge_curr(struct bq25980_device *bq, int batocp)
 389 {
 390         unsigned int batocp_reg_code;
 391         int ret;
 392
 393         batocp = max(batocp, BQ25980_BATOCP_MIN_uA);
 394         batocp = min(batocp, bq->chip_info->batocp_max);
 395
 396         batocp_reg_code = batocp / BQ25980_BATOCP_STEP_uA;
 397
 398         ret = regmap_update_bits(bq->regmap, BQ25980_BATOCP,
 399                                 BQ25980_BATOCP_MASK, batocp_reg_code);
 400         if (ret)
 401                 return ret;
 402
 403         return regmap_update_bits(bq->regmap, BQ25980_BATOCP_ALM,
 404                                 BQ25980_BATOCP_MASK, batocp_reg_code);
 405 }
 406
 407 static int bq25980_get_const_charge_volt(struct bq25980_device *bq)
 408 {
 409         unsigned int batovp_reg_code;
 410         int ret;
 411
 412         ret = regmap_read(bq->regmap, BQ25980_BATOVP, &batovp_reg_code);
 413         if (ret)
 414                 return ret;
 415
 416         return ((batovp_reg_code * bq->chip_info->batovp_step) +
 417                         bq->chip_info->batovp_offset);
 418 }
 419
 420 static int bq25980_set_const_charge_volt(struct bq25980_device *bq, int batovp)
 421 {
 422         unsigned int batovp_reg_code;
 423         int ret;
 424
 425         if (batovp < bq->chip_info->batovp_min)
 426                 batovp = bq->chip_info->batovp_min;
 427
 428         if (batovp > bq->chip_info->batovp_max)
 429                 batovp = bq->chip_info->batovp_max;
 430
 431         batovp_reg_code = (batovp - bq->chip_info->batovp_offset) /
 432                                                 bq->chip_info->batovp_step;
 433
 434         ret = regmap_write(bq->regmap, BQ25980_BATOVP, batovp_reg_code);
 435         if (ret)
 436                 return ret;
 437
 438         return regmap_write(bq->regmap, BQ25980_BATOVP_ALM, batovp_reg_code);
 439 }
 440
 441 static int bq25980_set_bypass(struct bq25980_device *bq, bool en_bypass)
 442 {
 443         int ret;
 444
 445         if (en_bypass)
 446                 ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
 447                                         BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
 448         else
 449                 ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
 450                                         BQ25980_EN_BYPASS, en_bypass);
 451         if (ret)
 452                 return ret;
 453
 454         bq->state.bypass = en_bypass;
 455
 456         return bq->state.bypass;
 457 }
 458
 459 static int bq25980_set_chg_en(struct bq25980_device *bq, bool en_chg)
 460 {
 461         int ret;
 462
 463         if (en_chg)
 464                 ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
 465                                         BQ25980_CHG_EN, BQ25980_CHG_EN);
 466         else
 467                 ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
 468                                         BQ25980_CHG_EN, en_chg);
 469         if (ret)
 470                 return ret;
 471
 472         bq->state.ce = en_chg;
 473
 474         return 0;
 475 }
 476
 477 static int bq25980_get_adc_ibus(struct bq25980_device *bq)
 478 {
 479         int ibus_adc_lsb, ibus_adc_msb;
 480         u16 ibus_adc;
 481         int ret;
 482
 483         ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_MSB, &ibus_adc_msb);
 484         if (ret)
 485                 return ret;
 486
 487         ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_LSB, &ibus_adc_lsb);
 488         if (ret)
 489                 return ret;
 490
 491         ibus_adc = (ibus_adc_msb << 8) | ibus_adc_lsb;
 492
 493         if (ibus_adc_msb & BQ25980_ADC_POLARITY_BIT)
 494                 return ((ibus_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
 495
 496         return ibus_adc * BQ25980_ADC_CURR_STEP_uA;
 497 }
 498
 499 static int bq25980_get_adc_vbus(struct bq25980_device *bq)
 500 {
 501         int vbus_adc_lsb, vbus_adc_msb;
 502         u16 vbus_adc;
 503         int ret;
 504
 505         ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_MSB, &vbus_adc_msb);
 506         if (ret)
 507                 return ret;
 508
 509         ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_LSB, &vbus_adc_lsb);
 510         if (ret)
 511                 return ret;
 512
 513         vbus_adc = (vbus_adc_msb << 8) | vbus_adc_lsb;
 514
 515         return vbus_adc * BQ25980_ADC_VOLT_STEP_uV;
 516 }
 517
 518 static int bq25980_get_ibat_adc(struct bq25980_device *bq)
 519 {
 520         int ret;
 521         int ibat_adc_lsb, ibat_adc_msb;
 522         int ibat_adc;
 523
 524         ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
 525         if (ret)
 526                 return ret;
 527
 528         ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_LSB, &ibat_adc_lsb);
 529         if (ret)
 530                 return ret;
 531
 532         ibat_adc = (ibat_adc_msb << 8) | ibat_adc_lsb;
 533
 534         if (ibat_adc_msb & BQ25980_ADC_POLARITY_BIT)
 535                 return ((ibat_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
 536
 537         return ibat_adc * BQ25980_ADC_CURR_STEP_uA;
 538 }
 539
 540 static int bq25980_get_adc_vbat(struct bq25980_device *bq)
 541 {
 542         int vsys_adc_lsb, vsys_adc_msb;
 543         u16 vsys_adc;
 544         int ret;
 545
 546         ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_MSB, &vsys_adc_msb);
 547         if (ret)
 548                 return ret;
 549
 550         ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_LSB, &vsys_adc_lsb);
 551         if (ret)
 552                 return ret;
 553
 554         vsys_adc = (vsys_adc_msb << 8) | vsys_adc_lsb;
 555
 556         return vsys_adc * BQ25980_ADC_VOLT_STEP_uV;
 557 }
 558
 559 static int bq25980_get_state(struct bq25980_device *bq,
 560                                 struct bq25980_state *state)
 561 {
 562         unsigned int chg_ctrl_2;
 563         unsigned int stat1;
 564         unsigned int stat2;
 565         unsigned int stat3;
 566         unsigned int stat4;
 567         unsigned int ibat_adc_msb;
 568         int ret;
 569
 570         ret = regmap_read(bq->regmap, BQ25980_STAT1, &stat1);
 571         if (ret)
 572                 return ret;
 573
 574         ret = regmap_read(bq->regmap, BQ25980_STAT2, &stat2);
 575         if (ret)
 576                 return ret;
 577
 578         ret = regmap_read(bq->regmap, BQ25980_STAT3, &stat3);
 579         if (ret)
 580                 return ret;
 581
 582         ret = regmap_read(bq->regmap, BQ25980_STAT4, &stat4);
 583         if (ret)
 584                 return ret;
 585
 586         ret = regmap_read(bq->regmap, BQ25980_CHRGR_CTRL_2, &chg_ctrl_2);
 587         if (ret)
 588                 return ret;
 589
 590         ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
 591         if (ret)
 592                 return ret;
 593
 594         state->dischg = ibat_adc_msb & BQ25980_ADC_POLARITY_BIT;
 595         state->ovp = (stat1 & BQ25980_STAT1_OVP_MASK) |
 596                 (stat3 & BQ25980_STAT3_OVP_MASK);
 597         state->ocp = (stat1 & BQ25980_STAT1_OCP_MASK) |
 598                 (stat2 & BQ25980_STAT2_OCP_MASK);
 599         state->tflt = stat4 & BQ25980_STAT4_TFLT_MASK;
 600         state->wdt = stat4 & BQ25980_WD_STAT;
 601         state->online = stat3 & BQ25980_PRESENT_MASK;
 602         state->ce = chg_ctrl_2 & BQ25980_CHG_EN;
 603         state->hiz = chg_ctrl_2 & BQ25980_EN_HIZ;
 604         state->bypass = chg_ctrl_2 & BQ25980_EN_BYPASS;
 605
 606         return 0;
 607 }
 608
 609 static int bq25980_set_battery_property(struct power_supply *psy,
 610                                 enum power_supply_property psp,
 611                                 const union power_supply_propval *val)
 612 {
 613         struct bq25980_device *bq = power_supply_get_drvdata(psy);
 614         int ret = 0;
 615
 616         switch (psp) {
 617         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 618                 ret = bq25980_set_const_charge_curr(bq, val->intval);
 619                 if (ret)
 620                         return ret;
 621                 break;
 622
 623         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 624                 ret = bq25980_set_const_charge_volt(bq, val->intval);
 625                 if (ret)
 626                         return ret;
 627                 break;
 628
 629         default:
 630                 return -EINVAL;
 631         }
 632
 633         return ret;
 634 }
 635
 636 static int bq25980_get_battery_property(struct power_supply *psy,
 637                                 enum power_supply_property psp,
 638                                 union power_supply_propval *val)
 639 {
 640         struct bq25980_device *bq = power_supply_get_drvdata(psy);
 641         int ret = 0;
 642
 643         switch (psp) {
 644         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 645                 val->intval = bq->init_data.ichg_max;
 646                 break;
 647
 648         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 649                 val->intval = bq->init_data.vreg_max;
 650                 break;
 651
 652         case POWER_SUPPLY_PROP_CURRENT_NOW:
 653                 ret = bq25980_get_ibat_adc(bq);
 654                 val->intval = ret;
 655                 break;
 656
 657         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 658                 ret = bq25980_get_adc_vbat(bq);
 659                 if (ret < 0)
 660                         return ret;
 661
 662                 val->intval = ret;
 663                 break;
 664
 665         default:
 666                 return -EINVAL;
 667         }
 668
 669         return ret;
 670 }
 671
 672 static int bq25980_set_charger_property(struct power_supply *psy,
 673                 enum power_supply_property prop,
 674                 const union power_supply_propval *val)
 675 {
 676         struct bq25980_device *bq = power_supply_get_drvdata(psy);
 677         int ret = -EINVAL;
 678
 679         switch (prop) {
 680         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 681                 ret = bq25980_set_input_curr_lim(bq, val->intval);
 682                 if (ret)
 683                         return ret;
 684                 break;
 685
 686         case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
 687                 ret = bq25980_set_input_volt_lim(bq, val->intval);
 688                 if (ret)
 689                         return ret;
 690                 break;
 691
 692         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 693                 ret = bq25980_set_bypass(bq, val->intval);
 694                 if (ret)
 695                         return ret;
 696                 break;
 697
 698         case POWER_SUPPLY_PROP_STATUS:
 699                 ret = bq25980_set_chg_en(bq, val->intval);
 700                 if (ret)
 701                         return ret;
 702                 break;
 703
 704         default:
 705                 return -EINVAL;
 706         }
 707
 708         return ret;
 709 }
 710
 711 static int bq25980_get_charger_property(struct power_supply *psy,
 712                                 enum power_supply_property psp,
 713                                 union power_supply_propval *val)
 714 {
 715         struct bq25980_device *bq = power_supply_get_drvdata(psy);
 716         struct bq25980_state state;
 717         int ret = 0;
 718
 719         mutex_lock(&bq->lock);
 720         ret = bq25980_get_state(bq, &state);
 721         mutex_unlock(&bq->lock);
 722         if (ret)
 723                 return ret;
 724
 725         switch (psp) {
 726         case POWER_SUPPLY_PROP_MANUFACTURER:
 727                 val->strval = BQ25980_MANUFACTURER;
 728                 break;
 729         case POWER_SUPPLY_PROP_MODEL_NAME:
 730                 val->strval = bq->model_name;
 731                 break;
 732         case POWER_SUPPLY_PROP_ONLINE:
 733                 val->intval = state.online;
 734                 break;
 735
 736         case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
 737                 ret = bq25980_get_input_volt_lim(bq);
 738                 if (ret < 0)
 739                         return ret;
 740                 val->intval = ret;
 741                 break;
 742
 743         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 744                 ret = bq25980_get_input_curr_lim(bq);
 745                 if (ret < 0)
 746                         return ret;
 747
 748                 val->intval = ret;
 749                 break;
 750
 751         case POWER_SUPPLY_PROP_HEALTH:
 752                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 753
 754                 if (state.tflt)
 755                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 756                 else if (state.ovp)
 757                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 758                 else if (state.ocp)
 759                         val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
 760                 else if (state.wdt)
 761                         val->intval =
 762                                 POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
 763                 break;
 764
 765         case POWER_SUPPLY_PROP_STATUS:
 766                 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 767
 768                 if ((state.ce) && (!state.hiz))
 769                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 770                 else if (state.dischg)
 771                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 772                 else if (!state.ce)
 773                         val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 774                 break;
 775
 776         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 777                 val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
 778
 779                 if (!state.ce)
 780                         val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 781                 else if (state.bypass)
 782                         val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
 783                 else if (!state.bypass)
 784                         val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
 785                 break;
 786
 787         case POWER_SUPPLY_PROP_CURRENT_NOW:
 788                 ret = bq25980_get_adc_ibus(bq);
 789                 if (ret < 0)
 790                         return ret;
 791
 792                 val->intval = ret;
 793                 break;
 794
 795         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 796                 ret = bq25980_get_adc_vbus(bq);
 797                 if (ret < 0)
 798                         return ret;
 799
 800                 val->intval = ret;
 801                 break;
 802
 803         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 804                 ret = bq25980_get_const_charge_curr(bq);
 805                 if (ret < 0)
 806                         return ret;
 807
 808                 val->intval = ret;
 809                 break;
 810
 811         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 812                 ret = bq25980_get_const_charge_volt(bq);
 813                 if (ret < 0)
 814                         return ret;
 815
 816                 val->intval = ret;
 817                 break;
 818
 819         default:
 820                 return -EINVAL;
 821         }
 822
 823         return ret;
 824 }
 825
 826 static bool bq25980_state_changed(struct bq25980_device *bq,
 827                                   struct bq25980_state *new_state)
 828 {
 829         struct bq25980_state old_state;
 830
 831         mutex_lock(&bq->lock);
 832         old_state = bq->state;
 833         mutex_unlock(&bq->lock);
 834
 835         return (old_state.dischg != new_state->dischg ||
 836                 old_state.ovp != new_state->ovp ||
 837                 old_state.ocp != new_state->ocp ||
 838                 old_state.online != new_state->online ||
 839                 old_state.wdt != new_state->wdt ||
 840                 old_state.tflt != new_state->tflt ||
 841                 old_state.ce != new_state->ce ||
 842                 old_state.hiz != new_state->hiz ||
 843                 old_state.bypass != new_state->bypass);
 844 }
 845
 846 static irqreturn_t bq25980_irq_handler_thread(int irq, void *private)
 847 {
 848         struct bq25980_device *bq = private;
 849         struct bq25980_state state;
 850         int ret;
 851
 852         ret = bq25980_get_state(bq, &state);
 853         if (ret < 0)
 854                 goto irq_out;
 855
 856         if (!bq25980_state_changed(bq, &state))
 857                 goto irq_out;
 858
 859         mutex_lock(&bq->lock);
 860         bq->state = state;
 861         mutex_unlock(&bq->lock);
 862
 863         power_supply_changed(bq->charger);
 864
 865 irq_out:
 866         return IRQ_HANDLED;
 867 }
 868
 869 static enum power_supply_property bq25980_power_supply_props[] = {
 870         POWER_SUPPLY_PROP_MANUFACTURER,
 871         POWER_SUPPLY_PROP_MODEL_NAME,
 872         POWER_SUPPLY_PROP_STATUS,
 873         POWER_SUPPLY_PROP_ONLINE,
 874         POWER_SUPPLY_PROP_HEALTH,
 875         POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
 876         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 877         POWER_SUPPLY_PROP_CHARGE_TYPE,
 878         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 879         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 880         POWER_SUPPLY_PROP_CURRENT_NOW,
 881         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 882 };
 883
 884 static enum power_supply_property bq25980_battery_props[] = {
 885         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 886         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 887         POWER_SUPPLY_PROP_CURRENT_NOW,
 888         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 889 };
 890
 891 static char *bq25980_charger_supplied_to[] = {
 892         "main-battery",
 893 };
 894
 895 static int bq25980_property_is_writeable(struct power_supply *psy,
 896                                          enum power_supply_property prop)
 897 {
 898         switch (prop) {
 899         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 900         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 901         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 902         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 903         case POWER_SUPPLY_PROP_STATUS:
 904         case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
 905                 return true;
 906         default:
 907                 return false;
 908         }
 909 }
 910
 911 static const struct power_supply_desc bq25980_power_supply_desc = {
 912         .name = "bq25980-charger",
 913         .type = POWER_SUPPLY_TYPE_MAINS,
 914         .properties = bq25980_power_supply_props,
 915         .num_properties = ARRAY_SIZE(bq25980_power_supply_props),
 916         .get_property = bq25980_get_charger_property,
 917         .set_property = bq25980_set_charger_property,
 918         .property_is_writeable = bq25980_property_is_writeable,
 919 };
 920
 921 static struct power_supply_desc bq25980_battery_desc = {
 922         .name                   = "bq25980-battery",
 923         .type                   = POWER_SUPPLY_TYPE_BATTERY,
 924         .get_property           = bq25980_get_battery_property,
 925         .set_property           = bq25980_set_battery_property,
 926         .properties             = bq25980_battery_props,
 927         .num_properties         = ARRAY_SIZE(bq25980_battery_props),
 928         .property_is_writeable  = bq25980_property_is_writeable,
 929 };
 930
 931
 932 static bool bq25980_is_volatile_reg(struct device *dev, unsigned int reg)
 933 {
 934         switch (reg) {
 935         case BQ25980_CHRGR_CTRL_2:
 936         case BQ25980_STAT1...BQ25980_FLAG5:
 937         case BQ25980_ADC_CONTROL1...BQ25980_TDIE_ADC_LSB:
 938                 return true;
 939         default:
 940                 return false;
 941         }
 942 }
 943
 944 static const struct regmap_config bq25980_regmap_config = {
 945         .reg_bits = 8,
 946         .val_bits = 8,
 947
 948         .max_register = BQ25980_CHRGR_CTRL_6,
 949         .reg_defaults   = bq25980_reg_defs,
 950         .num_reg_defaults = ARRAY_SIZE(bq25980_reg_defs),
 951         .cache_type = REGCACHE_RBTREE,
 952         .volatile_reg = bq25980_is_volatile_reg,
 953 };
 954
 955 static const struct regmap_config bq25975_regmap_config = {
 956         .reg_bits = 8,
 957         .val_bits = 8,
 958
 959         .max_register = BQ25980_CHRGR_CTRL_6,
 960         .reg_defaults   = bq25975_reg_defs,
 961         .num_reg_defaults = ARRAY_SIZE(bq25975_reg_defs),
 962         .cache_type = REGCACHE_RBTREE,
 963         .volatile_reg = bq25980_is_volatile_reg,
 964 };
 965
 966 static const struct regmap_config bq25960_regmap_config = {
 967         .reg_bits = 8,
 968         .val_bits = 8,
 969
 970         .max_register = BQ25980_CHRGR_CTRL_6,
 971         .reg_defaults   = bq25960_reg_defs,
 972         .num_reg_defaults = ARRAY_SIZE(bq25960_reg_defs),
 973         .cache_type = REGCACHE_RBTREE,
 974         .volatile_reg = bq25980_is_volatile_reg,
 975 };
 976
 977 static const struct bq25980_chip_info bq25980_chip_info_tbl[] = {
 978         [BQ25980] = {
 979                 .model_id = BQ25980,
 980                 .regmap_config = &bq25980_regmap_config,
 981
 982                 .busocp_def = BQ25980_BUSOCP_DFLT_uA,
 983                 .busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
 984                 .busocp_sc_max = BQ25980_BUSOCP_SC_MAX_uA,
 985                 .busocp_byp_max = BQ25980_BUSOCP_BYP_MAX_uA,
 986                 .busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
 987
 988                 .busovp_sc_def = BQ25980_BUSOVP_DFLT_uV,
 989                 .busovp_byp_def = BQ25980_BUSOVP_BYPASS_DFLT_uV,
 990                 .busovp_sc_step = BQ25980_BUSOVP_SC_STEP_uV,
 991                 .busovp_sc_offset = BQ25980_BUSOVP_SC_OFFSET_uV,
 992                 .busovp_byp_step = BQ25980_BUSOVP_BYP_STEP_uV,
 993                 .busovp_byp_offset = BQ25980_BUSOVP_BYP_OFFSET_uV,
 994                 .busovp_sc_min = BQ25980_BUSOVP_SC_MIN_uV,
 995                 .busovp_sc_max = BQ25980_BUSOVP_SC_MAX_uV,
 996                 .busovp_byp_min = BQ25980_BUSOVP_BYP_MIN_uV,
 997                 .busovp_byp_max = BQ25980_BUSOVP_BYP_MAX_uV,
 998
 999                 .batovp_def = BQ25980_BATOVP_DFLT_uV,
1000                 .batovp_max = BQ25980_BATOVP_MAX_uV,
1001                 .batovp_min = BQ25980_BATOVP_MIN_uV,
1002                 .batovp_step = BQ25980_BATOVP_STEP_uV,
1003                 .batovp_offset = BQ25980_BATOVP_OFFSET_uV,
1004
1005                 .batocp_def = BQ25980_BATOCP_DFLT_uA,
1006                 .batocp_max = BQ25980_BATOCP_MAX_uA,
1007         },
1008
1009         [BQ25975] = {
1010                 .model_id = BQ25975,
1011                 .regmap_config = &bq25975_regmap_config,
1012
1013                 .busocp_def = BQ25975_BUSOCP_DFLT_uA,
1014                 .busocp_sc_min = BQ25975_BUSOCP_SC_MAX_uA,
1015                 .busocp_sc_max = BQ25975_BUSOCP_SC_MAX_uA,
1016                 .busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
1017                 .busocp_byp_max = BQ25975_BUSOCP_BYP_MAX_uA,
1018
1019                 .busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1020                 .busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1021                 .busovp_sc_step = BQ25975_BUSOVP_SC_STEP_uV,
1022                 .busovp_sc_offset = BQ25975_BUSOVP_SC_OFFSET_uV,
1023                 .busovp_byp_step = BQ25975_BUSOVP_BYP_STEP_uV,
1024                 .busovp_byp_offset = BQ25975_BUSOVP_BYP_OFFSET_uV,
1025                 .busovp_sc_min = BQ25975_BUSOVP_SC_MIN_uV,
1026                 .busovp_sc_max = BQ25975_BUSOVP_SC_MAX_uV,
1027                 .busovp_byp_min = BQ25975_BUSOVP_BYP_MIN_uV,
1028                 .busovp_byp_max = BQ25975_BUSOVP_BYP_MAX_uV,
1029
1030                 .batovp_def = BQ25975_BATOVP_DFLT_uV,
1031                 .batovp_max = BQ25975_BATOVP_MAX_uV,
1032                 .batovp_min = BQ25975_BATOVP_MIN_uV,
1033                 .batovp_step = BQ25975_BATOVP_STEP_uV,
1034                 .batovp_offset = BQ25975_BATOVP_OFFSET_uV,
1035
1036                 .batocp_def = BQ25980_BATOCP_DFLT_uA,
1037                 .batocp_max = BQ25980_BATOCP_MAX_uA,
1038         },
1039
1040         [BQ25960] = {
1041                 .model_id = BQ25960,
1042                 .regmap_config = &bq25960_regmap_config,
1043
1044                 .busocp_def = BQ25960_BUSOCP_DFLT_uA,
1045                 .busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
1046                 .busocp_sc_max = BQ25960_BUSOCP_SC_MAX_uA,
1047                 .busocp_byp_min = BQ25960_BUSOCP_SC_MAX_uA,
1048                 .busocp_byp_max = BQ25960_BUSOCP_BYP_MAX_uA,
1049
1050                 .busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1051                 .busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1052                 .busovp_sc_step = BQ25960_BUSOVP_SC_STEP_uV,
1053                 .busovp_sc_offset = BQ25960_BUSOVP_SC_OFFSET_uV,
1054                 .busovp_byp_step = BQ25960_BUSOVP_BYP_STEP_uV,
1055                 .busovp_byp_offset = BQ25960_BUSOVP_BYP_OFFSET_uV,
1056                 .busovp_sc_min = BQ25960_BUSOVP_SC_MIN_uV,
1057                 .busovp_sc_max = BQ25960_BUSOVP_SC_MAX_uV,
1058                 .busovp_byp_min = BQ25960_BUSOVP_BYP_MIN_uV,
1059                 .busovp_byp_max = BQ25960_BUSOVP_BYP_MAX_uV,
1060
1061                 .batovp_def = BQ25960_BATOVP_DFLT_uV,
1062                 .batovp_max = BQ25960_BATOVP_MAX_uV,
1063                 .batovp_min = BQ25960_BATOVP_MIN_uV,
1064                 .batovp_step = BQ25960_BATOVP_STEP_uV,
1065                 .batovp_offset = BQ25960_BATOVP_OFFSET_uV,
1066
1067                 .batocp_def = BQ25960_BATOCP_DFLT_uA,
1068                 .batocp_max = BQ25960_BATOCP_MAX_uA,
1069         },
1070 };
1071
1072 static int bq25980_power_supply_init(struct bq25980_device *bq,
1073                                                         struct device *dev)
1074 {
1075         struct power_supply_config psy_cfg = { .drv_data = bq,
1076                                                 .of_node = dev->of_node, };
1077
1078         psy_cfg.supplied_to = bq25980_charger_supplied_to;
1079         psy_cfg.num_supplicants = ARRAY_SIZE(bq25980_charger_supplied_to);
1080
1081         bq->charger = devm_power_supply_register(bq->dev,
1082                                                  &bq25980_power_supply_desc,
1083                                                  &psy_cfg);
1084         if (IS_ERR(bq->charger))
1085                 return -EINVAL;
1086
1087         bq->battery = devm_power_supply_register(bq->dev,
1088                                                       &bq25980_battery_desc,
1089                                                       &psy_cfg);
1090         if (IS_ERR(bq->battery))
1091                 return -EINVAL;
1092
1093         return 0;
1094 }
1095
1096 static int bq25980_hw_init(struct bq25980_device *bq)
1097 {
1098         struct power_supply_battery_info bat_info = { };
1099         int wd_reg_val = BQ25980_WATCHDOG_DIS;
1100         int wd_max_val = BQ25980_NUM_WD_VAL - 1;
1101         int ret = 0;
1102         int curr_val;
1103         int volt_val;
1104         int i;
1105
1106         if (bq->watchdog_timer) {
1107                 if (bq->watchdog_timer >= bq25980_watchdog_time[wd_max_val])
1108                         wd_reg_val = wd_max_val;
1109                 else {
1110                         for (i = 0; i < wd_max_val; i++) {
1111                                 if (bq->watchdog_timer > bq25980_watchdog_time[i] &&
1112                                     bq->watchdog_timer < bq25980_watchdog_time[i + 1]) {
1113                                         wd_reg_val = i;
1114                                         break;
1115                                 }
1116                         }
1117                 }
1118         }
1119
1120         ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_3,
1121                                  BQ25980_WATCHDOG_MASK, wd_reg_val);
1122         if (ret)
1123                 return ret;
1124
1125         ret = power_supply_get_battery_info(bq->charger, &bat_info);
1126         if (ret) {
1127                 dev_warn(bq->dev, "battery info missing\n");
1128                 return -EINVAL;
1129         }
1130
1131         bq->init_data.ichg_max = bat_info.constant_charge_current_max_ua;
1132         bq->init_data.vreg_max = bat_info.constant_charge_voltage_max_uv;
1133
1134         if (bq->state.bypass) {
1135                 ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
1136                                         BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
1137                 if (ret)
1138                         return ret;
1139
1140                 curr_val = bq->init_data.bypass_ilim;
1141                 volt_val = bq->init_data.bypass_vlim;
1142         } else {
1143                 curr_val = bq->init_data.sc_ilim;
1144                 volt_val = bq->init_data.sc_vlim;
1145         }
1146
1147         ret = bq25980_set_input_curr_lim(bq, curr_val);
1148         if (ret)
1149                 return ret;
1150
1151         ret = bq25980_set_input_volt_lim(bq, volt_val);
1152         if (ret)
1153                 return ret;
1154
1155         return regmap_update_bits(bq->regmap, BQ25980_ADC_CONTROL1,
1156                                  BQ25980_ADC_EN, BQ25980_ADC_EN);
1157 }
1158
1159 static int bq25980_parse_dt(struct bq25980_device *bq)
1160 {
1161         int ret;
1162
1163         ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
1164                                        &bq->watchdog_timer);
1165         if (ret)
1166                 bq->watchdog_timer = BQ25980_WATCHDOG_MIN;
1167
1168         if (bq->watchdog_timer > BQ25980_WATCHDOG_MAX ||
1169             bq->watchdog_timer < BQ25980_WATCHDOG_MIN)
1170                 return -EINVAL;
1171
1172         ret = device_property_read_u32(bq->dev,
1173                                        "ti,sc-ovp-limit-microvolt",
1174                                        &bq->init_data.sc_vlim);
1175         if (ret)
1176                 bq->init_data.sc_vlim = bq->chip_info->busovp_sc_def;
1177
1178         if (bq->init_data.sc_vlim > bq->chip_info->busovp_sc_max ||
1179             bq->init_data.sc_vlim < bq->chip_info->busovp_sc_min) {
1180                 dev_err(bq->dev, "SC ovp limit is out of range\n");
1181                 return -EINVAL;
1182         }
1183
1184         ret = device_property_read_u32(bq->dev,
1185                                        "ti,sc-ocp-limit-microamp",
1186                                        &bq->init_data.sc_ilim);
1187         if (ret)
1188                 bq->init_data.sc_ilim = bq->chip_info->busocp_def;
1189
1190         if (bq->init_data.sc_ilim > bq->chip_info->busocp_sc_max ||
1191             bq->init_data.sc_ilim < bq->chip_info->busocp_sc_min) {
1192                 dev_err(bq->dev, "SC ocp limit is out of range\n");
1193                 return -EINVAL;
1194         }
1195
1196         ret = device_property_read_u32(bq->dev,
1197                                        "ti,bypass-ovp-limit-microvolt",
1198                                        &bq->init_data.bypass_vlim);
1199         if (ret)
1200                 bq->init_data.bypass_vlim = bq->chip_info->busovp_byp_def;
1201
1202         if (bq->init_data.bypass_vlim > bq->chip_info->busovp_byp_max ||
1203             bq->init_data.bypass_vlim < bq->chip_info->busovp_byp_min) {
1204                 dev_err(bq->dev, "Bypass ovp limit is out of range\n");
1205                 return -EINVAL;
1206         }
1207
1208         ret = device_property_read_u32(bq->dev,
1209                                        "ti,bypass-ocp-limit-microamp",
1210                                        &bq->init_data.bypass_ilim);
1211         if (ret)
1212                 bq->init_data.bypass_ilim = bq->chip_info->busocp_def;
1213
1214         if (bq->init_data.bypass_ilim > bq->chip_info->busocp_byp_max ||
1215             bq->init_data.bypass_ilim < bq->chip_info->busocp_byp_min) {
1216                 dev_err(bq->dev, "Bypass ocp limit is out of range\n");
1217                 return -EINVAL;
1218         }
1219
1220
1221         bq->state.bypass = device_property_read_bool(bq->dev,
1222                                                       "ti,bypass-enable");
1223         return 0;
1224 }
1225
1226 static int bq25980_probe(struct i2c_client *client,
1227                          const struct i2c_device_id *id)
1228 {
1229         struct device *dev = &client->dev;
1230         struct bq25980_device *bq;
1231         int ret;
1232
1233         bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
1234         if (!bq)
1235                 return -ENOMEM;
1236
1237         bq->client = client;
1238         bq->dev = dev;
1239
1240         mutex_init(&bq->lock);
1241
1242         strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
1243         bq->chip_info = &bq25980_chip_info_tbl[id->driver_data];
1244
1245         bq->regmap = devm_regmap_init_i2c(client,
1246                                           bq->chip_info->regmap_config);
1247         if (IS_ERR(bq->regmap)) {
1248                 dev_err(dev, "Failed to allocate register map\n");
1249                 return PTR_ERR(bq->regmap);
1250         }
1251
1252         i2c_set_clientdata(client, bq);
1253
1254         ret = bq25980_parse_dt(bq);
1255         if (ret) {
1256                 dev_err(dev, "Failed to read device tree properties%d\n", ret);
1257                 return ret;
1258         }
1259
1260         if (client->irq) {
1261                 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1262                                                 bq25980_irq_handler_thread,
1263                                                 IRQF_TRIGGER_FALLING |
1264                                                 IRQF_ONESHOT,
1265                                                 dev_name(&client->dev), bq);
1266                 if (ret)
1267                         return ret;
1268         }
1269
1270         ret = bq25980_power_supply_init(bq, dev);
1271         if (ret) {
1272                 dev_err(dev, "Failed to register power supply\n");
1273                 return ret;
1274         }
1275
1276         ret = bq25980_hw_init(bq);
1277         if (ret) {
1278                 dev_err(dev, "Cannot initialize the chip.\n");
1279                 return ret;
1280         }
1281
1282         return 0;
1283 }
1284
1285 static const struct i2c_device_id bq25980_i2c_ids[] = {
1286         { "bq25980", BQ25980 },
1287         { "bq25975", BQ25975 },
1288         { "bq25975", BQ25975 },
1289         {},
1290 };
1291 MODULE_DEVICE_TABLE(i2c, bq25980_i2c_ids);
1292
1293 static const struct of_device_id bq25980_of_match[] = {
1294         { .compatible = "ti,bq25980", .data = (void *)BQ25980 },
1295         { .compatible = "ti,bq25975", .data = (void *)BQ25975 },
1296         { .compatible = "ti,bq25960", .data = (void *)BQ25960 },
1297         { },
1298 };
1299 MODULE_DEVICE_TABLE(of, bq25980_of_match);
1300
1301 static struct i2c_driver bq25980_driver = {
1302         .driver = {
1303                 .name = "bq25980-charger",
1304                 .of_match_table = bq25980_of_match,
1305         },
1306         .probe = bq25980_probe,
1307         .id_table = bq25980_i2c_ids,
1308 };
1309 module_i2c_driver(bq25980_driver);
1310
1311 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
1312 MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
1313 MODULE_DESCRIPTION("bq25980 charger driver");
1314 MODULE_LICENSE("GPL v2");