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_get_battery_property(struct power_supply *psy,
 610                                 enum power_supply_property psp,
 611                                 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_MAX:
 618                 val->intval = bq->init_data.ichg_max;
 619                 break;
 620
 621         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 622                 val->intval = bq->init_data.vreg_max;
 623                 break;
 624
 625         case POWER_SUPPLY_PROP_CURRENT_NOW:
 626                 ret = bq25980_get_ibat_adc(bq);
 627                 val->intval = ret;
 628                 break;
 629
 630         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 631                 ret = bq25980_get_adc_vbat(bq);
 632                 if (ret < 0)
 633                         return ret;
 634
 635                 val->intval = ret;
 636                 break;
 637
 638         default:
 639                 return -EINVAL;
 640         }
 641
 642         return ret;
 643 }
 644
 645 static int bq25980_set_charger_property(struct power_supply *psy,
 646                 enum power_supply_property prop,
 647                 const union power_supply_propval *val)
 648 {
 649         struct bq25980_device *bq = power_supply_get_drvdata(psy);
 650         int ret = -EINVAL;
 651
 652         switch (prop) {
 653         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 654                 ret = bq25980_set_input_curr_lim(bq, val->intval);
 655                 if (ret)
 656                         return ret;
 657                 break;
 658
 659         case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
 660                 ret = bq25980_set_input_volt_lim(bq, val->intval);
 661                 if (ret)
 662                         return ret;
 663                 break;
 664
 665         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 666                 ret = bq25980_set_bypass(bq, val->intval);
 667                 if (ret)
 668                         return ret;
 669                 break;
 670
 671         case POWER_SUPPLY_PROP_STATUS:
 672                 ret = bq25980_set_chg_en(bq, val->intval);
 673                 if (ret)
 674                         return ret;
 675                 break;
 676
 677         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 678                 ret = bq25980_set_const_charge_curr(bq, val->intval);
 679                 if (ret)
 680                         return ret;
 681                 break;
 682
 683         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 684                 ret = bq25980_set_const_charge_volt(bq, val->intval);
 685                 if (ret)
 686                         return ret;
 687                 break;
 688
 689         default:
 690                 return -EINVAL;
 691         }
 692
 693         return ret;
 694 }
 695
 696 static int bq25980_get_charger_property(struct power_supply *psy,
 697                                 enum power_supply_property psp,
 698                                 union power_supply_propval *val)
 699 {
 700         struct bq25980_device *bq = power_supply_get_drvdata(psy);
 701         struct bq25980_state state;
 702         int ret = 0;
 703
 704         mutex_lock(&bq->lock);
 705         ret = bq25980_get_state(bq, &state);
 706         mutex_unlock(&bq->lock);
 707         if (ret)
 708                 return ret;
 709
 710         switch (psp) {
 711         case POWER_SUPPLY_PROP_MANUFACTURER:
 712                 val->strval = BQ25980_MANUFACTURER;
 713                 break;
 714         case POWER_SUPPLY_PROP_MODEL_NAME:
 715                 val->strval = bq->model_name;
 716                 break;
 717         case POWER_SUPPLY_PROP_ONLINE:
 718                 val->intval = state.online;
 719                 break;
 720
 721         case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
 722                 ret = bq25980_get_input_volt_lim(bq);
 723                 if (ret < 0)
 724                         return ret;
 725                 val->intval = ret;
 726                 break;
 727
 728         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 729                 ret = bq25980_get_input_curr_lim(bq);
 730                 if (ret < 0)
 731                         return ret;
 732
 733                 val->intval = ret;
 734                 break;
 735
 736         case POWER_SUPPLY_PROP_HEALTH:
 737                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
 738
 739                 if (state.tflt)
 740                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 741                 else if (state.ovp)
 742                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 743                 else if (state.ocp)
 744                         val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
 745                 else if (state.wdt)
 746                         val->intval =
 747                                 POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
 748                 break;
 749
 750         case POWER_SUPPLY_PROP_STATUS:
 751                 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 752
 753                 if ((state.ce) && (!state.hiz))
 754                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 755                 else if (state.dischg)
 756                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 757                 else if (!state.ce)
 758                         val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 759                 break;
 760
 761         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 762                 val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
 763
 764                 if (!state.ce)
 765                         val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 766                 else if (state.bypass)
 767                         val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
 768                 else if (!state.bypass)
 769                         val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
 770                 break;
 771
 772         case POWER_SUPPLY_PROP_CURRENT_NOW:
 773                 ret = bq25980_get_adc_ibus(bq);
 774                 if (ret < 0)
 775                         return ret;
 776
 777                 val->intval = ret;
 778                 break;
 779
 780         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 781                 ret = bq25980_get_adc_vbus(bq);
 782                 if (ret < 0)
 783                         return ret;
 784
 785                 val->intval = ret;
 786                 break;
 787
 788         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 789                 ret = bq25980_get_const_charge_curr(bq);
 790                 if (ret < 0)
 791                         return ret;
 792
 793                 val->intval = ret;
 794                 break;
 795
 796         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 797                 ret = bq25980_get_const_charge_volt(bq);
 798                 if (ret < 0)
 799                         return ret;
 800
 801                 val->intval = ret;
 802                 break;
 803
 804         default:
 805                 return -EINVAL;
 806         }
 807
 808         return ret;
 809 }
 810
 811 static bool bq25980_state_changed(struct bq25980_device *bq,
 812                                   struct bq25980_state *new_state)
 813 {
 814         struct bq25980_state old_state;
 815
 816         mutex_lock(&bq->lock);
 817         old_state = bq->state;
 818         mutex_unlock(&bq->lock);
 819
 820         return (old_state.dischg != new_state->dischg ||
 821                 old_state.ovp != new_state->ovp ||
 822                 old_state.ocp != new_state->ocp ||
 823                 old_state.online != new_state->online ||
 824                 old_state.wdt != new_state->wdt ||
 825                 old_state.tflt != new_state->tflt ||
 826                 old_state.ce != new_state->ce ||
 827                 old_state.hiz != new_state->hiz ||
 828                 old_state.bypass != new_state->bypass);
 829 }
 830
 831 static irqreturn_t bq25980_irq_handler_thread(int irq, void *private)
 832 {
 833         struct bq25980_device *bq = private;
 834         struct bq25980_state state;
 835         int ret;
 836
 837         ret = bq25980_get_state(bq, &state);
 838         if (ret < 0)
 839                 goto irq_out;
 840
 841         if (!bq25980_state_changed(bq, &state))
 842                 goto irq_out;
 843
 844         mutex_lock(&bq->lock);
 845         bq->state = state;
 846         mutex_unlock(&bq->lock);
 847
 848         power_supply_changed(bq->charger);
 849
 850 irq_out:
 851         return IRQ_HANDLED;
 852 }
 853
 854 static enum power_supply_property bq25980_power_supply_props[] = {
 855         POWER_SUPPLY_PROP_MANUFACTURER,
 856         POWER_SUPPLY_PROP_MODEL_NAME,
 857         POWER_SUPPLY_PROP_STATUS,
 858         POWER_SUPPLY_PROP_ONLINE,
 859         POWER_SUPPLY_PROP_HEALTH,
 860         POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
 861         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 862         POWER_SUPPLY_PROP_CHARGE_TYPE,
 863         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 864         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 865         POWER_SUPPLY_PROP_CURRENT_NOW,
 866         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 867 };
 868
 869 static enum power_supply_property bq25980_battery_props[] = {
 870         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 871         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 872         POWER_SUPPLY_PROP_CURRENT_NOW,
 873         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 874 };
 875
 876 static char *bq25980_charger_supplied_to[] = {
 877         "main-battery",
 878 };
 879
 880 static int bq25980_property_is_writeable(struct power_supply *psy,
 881                                          enum power_supply_property prop)
 882 {
 883         switch (prop) {
 884         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 885         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 886         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 887         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 888         case POWER_SUPPLY_PROP_STATUS:
 889         case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
 890                 return true;
 891         default:
 892                 return false;
 893         }
 894 }
 895
 896 static const struct power_supply_desc bq25980_power_supply_desc = {
 897         .name = "bq25980-charger",
 898         .type = POWER_SUPPLY_TYPE_MAINS,
 899         .properties = bq25980_power_supply_props,
 900         .num_properties = ARRAY_SIZE(bq25980_power_supply_props),
 901         .get_property = bq25980_get_charger_property,
 902         .set_property = bq25980_set_charger_property,
 903         .property_is_writeable = bq25980_property_is_writeable,
 904 };
 905
 906 static struct power_supply_desc bq25980_battery_desc = {
 907         .name                   = "bq25980-battery",
 908         .type                   = POWER_SUPPLY_TYPE_BATTERY,
 909         .get_property           = bq25980_get_battery_property,
 910         .properties             = bq25980_battery_props,
 911         .num_properties         = ARRAY_SIZE(bq25980_battery_props),
 912         .property_is_writeable  = bq25980_property_is_writeable,
 913 };
 914
 915
 916 static bool bq25980_is_volatile_reg(struct device *dev, unsigned int reg)
 917 {
 918         switch (reg) {
 919         case BQ25980_CHRGR_CTRL_2:
 920         case BQ25980_STAT1...BQ25980_FLAG5:
 921         case BQ25980_ADC_CONTROL1...BQ25980_TDIE_ADC_LSB:
 922                 return true;
 923         default:
 924                 return false;
 925         }
 926 }
 927
 928 static const struct regmap_config bq25980_regmap_config = {
 929         .reg_bits = 8,
 930         .val_bits = 8,
 931
 932         .max_register = BQ25980_CHRGR_CTRL_6,
 933         .reg_defaults   = bq25980_reg_defs,
 934         .num_reg_defaults = ARRAY_SIZE(bq25980_reg_defs),
 935         .cache_type = REGCACHE_RBTREE,
 936         .volatile_reg = bq25980_is_volatile_reg,
 937 };
 938
 939 static const struct regmap_config bq25975_regmap_config = {
 940         .reg_bits = 8,
 941         .val_bits = 8,
 942
 943         .max_register = BQ25980_CHRGR_CTRL_6,
 944         .reg_defaults   = bq25975_reg_defs,
 945         .num_reg_defaults = ARRAY_SIZE(bq25975_reg_defs),
 946         .cache_type = REGCACHE_RBTREE,
 947         .volatile_reg = bq25980_is_volatile_reg,
 948 };
 949
 950 static const struct regmap_config bq25960_regmap_config = {
 951         .reg_bits = 8,
 952         .val_bits = 8,
 953
 954         .max_register = BQ25980_CHRGR_CTRL_6,
 955         .reg_defaults   = bq25960_reg_defs,
 956         .num_reg_defaults = ARRAY_SIZE(bq25960_reg_defs),
 957         .cache_type = REGCACHE_RBTREE,
 958         .volatile_reg = bq25980_is_volatile_reg,
 959 };
 960
 961 static const struct bq25980_chip_info bq25980_chip_info_tbl[] = {
 962         [BQ25980] = {
 963                 .model_id = BQ25980,
 964                 .regmap_config = &bq25980_regmap_config,
 965
 966                 .busocp_def = BQ25980_BUSOCP_DFLT_uA,
 967                 .busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
 968                 .busocp_sc_max = BQ25980_BUSOCP_SC_MAX_uA,
 969                 .busocp_byp_max = BQ25980_BUSOCP_BYP_MAX_uA,
 970                 .busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
 971
 972                 .busovp_sc_def = BQ25980_BUSOVP_DFLT_uV,
 973                 .busovp_byp_def = BQ25980_BUSOVP_BYPASS_DFLT_uV,
 974                 .busovp_sc_step = BQ25980_BUSOVP_SC_STEP_uV,
 975                 .busovp_sc_offset = BQ25980_BUSOVP_SC_OFFSET_uV,
 976                 .busovp_byp_step = BQ25980_BUSOVP_BYP_STEP_uV,
 977                 .busovp_byp_offset = BQ25980_BUSOVP_BYP_OFFSET_uV,
 978                 .busovp_sc_min = BQ25980_BUSOVP_SC_MIN_uV,
 979                 .busovp_sc_max = BQ25980_BUSOVP_SC_MAX_uV,
 980                 .busovp_byp_min = BQ25980_BUSOVP_BYP_MIN_uV,
 981                 .busovp_byp_max = BQ25980_BUSOVP_BYP_MAX_uV,
 982
 983                 .batovp_def = BQ25980_BATOVP_DFLT_uV,
 984                 .batovp_max = BQ25980_BATOVP_MAX_uV,
 985                 .batovp_min = BQ25980_BATOVP_MIN_uV,
 986                 .batovp_step = BQ25980_BATOVP_STEP_uV,
 987                 .batovp_offset = BQ25980_BATOVP_OFFSET_uV,
 988
 989                 .batocp_def = BQ25980_BATOCP_DFLT_uA,
 990                 .batocp_max = BQ25980_BATOCP_MAX_uA,
 991         },
 992
 993         [BQ25975] = {
 994                 .model_id = BQ25975,
 995                 .regmap_config = &bq25975_regmap_config,
 996
 997                 .busocp_def = BQ25975_BUSOCP_DFLT_uA,
 998                 .busocp_sc_min = BQ25975_BUSOCP_SC_MAX_uA,
 999                 .busocp_sc_max = BQ25975_BUSOCP_SC_MAX_uA,
1000                 .busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
1001                 .busocp_byp_max = BQ25975_BUSOCP_BYP_MAX_uA,
1002
1003                 .busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1004                 .busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1005                 .busovp_sc_step = BQ25975_BUSOVP_SC_STEP_uV,
1006                 .busovp_sc_offset = BQ25975_BUSOVP_SC_OFFSET_uV,
1007                 .busovp_byp_step = BQ25975_BUSOVP_BYP_STEP_uV,
1008                 .busovp_byp_offset = BQ25975_BUSOVP_BYP_OFFSET_uV,
1009                 .busovp_sc_min = BQ25975_BUSOVP_SC_MIN_uV,
1010                 .busovp_sc_max = BQ25975_BUSOVP_SC_MAX_uV,
1011                 .busovp_byp_min = BQ25975_BUSOVP_BYP_MIN_uV,
1012                 .busovp_byp_max = BQ25975_BUSOVP_BYP_MAX_uV,
1013
1014                 .batovp_def = BQ25975_BATOVP_DFLT_uV,
1015                 .batovp_max = BQ25975_BATOVP_MAX_uV,
1016                 .batovp_min = BQ25975_BATOVP_MIN_uV,
1017                 .batovp_step = BQ25975_BATOVP_STEP_uV,
1018                 .batovp_offset = BQ25975_BATOVP_OFFSET_uV,
1019
1020                 .batocp_def = BQ25980_BATOCP_DFLT_uA,
1021                 .batocp_max = BQ25980_BATOCP_MAX_uA,
1022         },
1023
1024         [BQ25960] = {
1025                 .model_id = BQ25960,
1026                 .regmap_config = &bq25960_regmap_config,
1027
1028                 .busocp_def = BQ25960_BUSOCP_DFLT_uA,
1029                 .busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
1030                 .busocp_sc_max = BQ25960_BUSOCP_SC_MAX_uA,
1031                 .busocp_byp_min = BQ25960_BUSOCP_SC_MAX_uA,
1032                 .busocp_byp_max = BQ25960_BUSOCP_BYP_MAX_uA,
1033
1034                 .busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1035                 .busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1036                 .busovp_sc_step = BQ25960_BUSOVP_SC_STEP_uV,
1037                 .busovp_sc_offset = BQ25960_BUSOVP_SC_OFFSET_uV,
1038                 .busovp_byp_step = BQ25960_BUSOVP_BYP_STEP_uV,
1039                 .busovp_byp_offset = BQ25960_BUSOVP_BYP_OFFSET_uV,
1040                 .busovp_sc_min = BQ25960_BUSOVP_SC_MIN_uV,
1041                 .busovp_sc_max = BQ25960_BUSOVP_SC_MAX_uV,
1042                 .busovp_byp_min = BQ25960_BUSOVP_BYP_MIN_uV,
1043                 .busovp_byp_max = BQ25960_BUSOVP_BYP_MAX_uV,
1044
1045                 .batovp_def = BQ25960_BATOVP_DFLT_uV,
1046                 .batovp_max = BQ25960_BATOVP_MAX_uV,
1047                 .batovp_min = BQ25960_BATOVP_MIN_uV,
1048                 .batovp_step = BQ25960_BATOVP_STEP_uV,
1049                 .batovp_offset = BQ25960_BATOVP_OFFSET_uV,
1050
1051                 .batocp_def = BQ25960_BATOCP_DFLT_uA,
1052                 .batocp_max = BQ25960_BATOCP_MAX_uA,
1053         },
1054 };
1055
1056 static int bq25980_power_supply_init(struct bq25980_device *bq,
1057                                                         struct device *dev)
1058 {
1059         struct power_supply_config psy_cfg = { .drv_data = bq,
1060                                                 .of_node = dev->of_node, };
1061
1062         psy_cfg.supplied_to = bq25980_charger_supplied_to;
1063         psy_cfg.num_supplicants = ARRAY_SIZE(bq25980_charger_supplied_to);
1064
1065         bq->charger = devm_power_supply_register(bq->dev,
1066                                                  &bq25980_power_supply_desc,
1067                                                  &psy_cfg);
1068         if (IS_ERR(bq->charger))
1069                 return -EINVAL;
1070
1071         bq->battery = devm_power_supply_register(bq->dev,
1072                                                       &bq25980_battery_desc,
1073                                                       &psy_cfg);
1074         if (IS_ERR(bq->battery))
1075                 return -EINVAL;
1076
1077         return 0;
1078 }
1079
1080 static int bq25980_hw_init(struct bq25980_device *bq)
1081 {
1082         struct power_supply_battery_info bat_info = { };
1083         int wd_reg_val = BQ25980_WATCHDOG_DIS;
1084         int wd_max_val = BQ25980_NUM_WD_VAL - 1;
1085         int ret = 0;
1086         int curr_val;
1087         int volt_val;
1088         int i;
1089
1090         if (bq->watchdog_timer) {
1091                 if (bq->watchdog_timer >= bq25980_watchdog_time[wd_max_val])
1092                         wd_reg_val = wd_max_val;
1093                 else {
1094                         for (i = 0; i < wd_max_val; i++) {
1095                                 if (bq->watchdog_timer > bq25980_watchdog_time[i] &&
1096                                     bq->watchdog_timer < bq25980_watchdog_time[i + 1]) {
1097                                         wd_reg_val = i;
1098                                         break;
1099                                 }
1100                         }
1101                 }
1102         }
1103
1104         ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_3,
1105                                  BQ25980_WATCHDOG_MASK, wd_reg_val);
1106         if (ret)
1107                 return ret;
1108
1109         ret = power_supply_get_battery_info(bq->charger, &bat_info);
1110         if (ret) {
1111                 dev_warn(bq->dev, "battery info missing\n");
1112                 return -EINVAL;
1113         }
1114
1115         bq->init_data.ichg_max = bat_info.constant_charge_current_max_ua;
1116         bq->init_data.vreg_max = bat_info.constant_charge_voltage_max_uv;
1117
1118         if (bq->state.bypass) {
1119                 ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
1120                                         BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
1121                 if (ret)
1122                         return ret;
1123
1124                 curr_val = bq->init_data.bypass_ilim;
1125                 volt_val = bq->init_data.bypass_vlim;
1126         } else {
1127                 curr_val = bq->init_data.sc_ilim;
1128                 volt_val = bq->init_data.sc_vlim;
1129         }
1130
1131         ret = bq25980_set_input_curr_lim(bq, curr_val);
1132         if (ret)
1133                 return ret;
1134
1135         ret = bq25980_set_input_volt_lim(bq, volt_val);
1136         if (ret)
1137                 return ret;
1138
1139         return regmap_update_bits(bq->regmap, BQ25980_ADC_CONTROL1,
1140                                  BQ25980_ADC_EN, BQ25980_ADC_EN);
1141 }
1142
1143 static int bq25980_parse_dt(struct bq25980_device *bq)
1144 {
1145         int ret;
1146
1147         ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
1148                                        &bq->watchdog_timer);
1149         if (ret)
1150                 bq->watchdog_timer = BQ25980_WATCHDOG_MIN;
1151
1152         if (bq->watchdog_timer > BQ25980_WATCHDOG_MAX ||
1153             bq->watchdog_timer < BQ25980_WATCHDOG_MIN)
1154                 return -EINVAL;
1155
1156         ret = device_property_read_u32(bq->dev,
1157                                        "ti,sc-ovp-limit-microvolt",
1158                                        &bq->init_data.sc_vlim);
1159         if (ret)
1160                 bq->init_data.sc_vlim = bq->chip_info->busovp_sc_def;
1161
1162         if (bq->init_data.sc_vlim > bq->chip_info->busovp_sc_max ||
1163             bq->init_data.sc_vlim < bq->chip_info->busovp_sc_min) {
1164                 dev_err(bq->dev, "SC ovp limit is out of range\n");
1165                 return -EINVAL;
1166         }
1167
1168         ret = device_property_read_u32(bq->dev,
1169                                        "ti,sc-ocp-limit-microamp",
1170                                        &bq->init_data.sc_ilim);
1171         if (ret)
1172                 bq->init_data.sc_ilim = bq->chip_info->busocp_def;
1173
1174         if (bq->init_data.sc_ilim > bq->chip_info->busocp_sc_max ||
1175             bq->init_data.sc_ilim < bq->chip_info->busocp_sc_min) {
1176                 dev_err(bq->dev, "SC ocp limit is out of range\n");
1177                 return -EINVAL;
1178         }
1179
1180         ret = device_property_read_u32(bq->dev,
1181                                        "ti,bypass-ovp-limit-microvolt",
1182                                        &bq->init_data.bypass_vlim);
1183         if (ret)
1184                 bq->init_data.bypass_vlim = bq->chip_info->busovp_byp_def;
1185
1186         if (bq->init_data.bypass_vlim > bq->chip_info->busovp_byp_max ||
1187             bq->init_data.bypass_vlim < bq->chip_info->busovp_byp_min) {
1188                 dev_err(bq->dev, "Bypass ovp limit is out of range\n");
1189                 return -EINVAL;
1190         }
1191
1192         ret = device_property_read_u32(bq->dev,
1193                                        "ti,bypass-ocp-limit-microamp",
1194                                        &bq->init_data.bypass_ilim);
1195         if (ret)
1196                 bq->init_data.bypass_ilim = bq->chip_info->busocp_def;
1197
1198         if (bq->init_data.bypass_ilim > bq->chip_info->busocp_byp_max ||
1199             bq->init_data.bypass_ilim < bq->chip_info->busocp_byp_min) {
1200                 dev_err(bq->dev, "Bypass ocp limit is out of range\n");
1201                 return -EINVAL;
1202         }
1203
1204
1205         bq->state.bypass = device_property_read_bool(bq->dev,
1206                                                       "ti,bypass-enable");
1207         return 0;
1208 }
1209
1210 static int bq25980_probe(struct i2c_client *client,
1211                          const struct i2c_device_id *id)
1212 {
1213         struct device *dev = &client->dev;
1214         struct bq25980_device *bq;
1215         int ret;
1216
1217         bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
1218         if (!bq)
1219                 return -ENOMEM;
1220
1221         bq->client = client;
1222         bq->dev = dev;
1223
1224         mutex_init(&bq->lock);
1225
1226         strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
1227         bq->chip_info = &bq25980_chip_info_tbl[id->driver_data];
1228
1229         bq->regmap = devm_regmap_init_i2c(client,
1230                                           bq->chip_info->regmap_config);
1231         if (IS_ERR(bq->regmap)) {
1232                 dev_err(dev, "Failed to allocate register map\n");
1233                 return PTR_ERR(bq->regmap);
1234         }
1235
1236         i2c_set_clientdata(client, bq);
1237
1238         ret = bq25980_parse_dt(bq);
1239         if (ret) {
1240                 dev_err(dev, "Failed to read device tree properties%d\n", ret);
1241                 return ret;
1242         }
1243
1244         if (client->irq) {
1245                 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1246                                                 bq25980_irq_handler_thread,
1247                                                 IRQF_TRIGGER_FALLING |
1248                                                 IRQF_ONESHOT,
1249                                                 dev_name(&client->dev), bq);
1250                 if (ret)
1251                         return ret;
1252         }
1253
1254         ret = bq25980_power_supply_init(bq, dev);
1255         if (ret) {
1256                 dev_err(dev, "Failed to register power supply\n");
1257                 return ret;
1258         }
1259
1260         ret = bq25980_hw_init(bq);
1261         if (ret) {
1262                 dev_err(dev, "Cannot initialize the chip.\n");
1263                 return ret;
1264         }
1265
1266         return 0;
1267 }
1268
1269 static const struct i2c_device_id bq25980_i2c_ids[] = {
1270         { "bq25980", BQ25980 },
1271         { "bq25975", BQ25975 },
1272         { "bq25960", BQ25960 },
1273         {},
1274 };
1275 MODULE_DEVICE_TABLE(i2c, bq25980_i2c_ids);
1276
1277 static const struct of_device_id bq25980_of_match[] = {
1278         { .compatible = "ti,bq25980", .data = (void *)BQ25980 },
1279         { .compatible = "ti,bq25975", .data = (void *)BQ25975 },
1280         { .compatible = "ti,bq25960", .data = (void *)BQ25960 },
1281         { },
1282 };
1283 MODULE_DEVICE_TABLE(of, bq25980_of_match);
1284
1285 static struct i2c_driver bq25980_driver = {
1286         .driver = {
1287                 .name = "bq25980-charger",
1288                 .of_match_table = bq25980_of_match,
1289         },
1290         .probe = bq25980_probe,
1291         .id_table = bq25980_i2c_ids,
1292 };
1293 module_i2c_driver(bq25980_driver);
1294
1295 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
1296 MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
1297 MODULE_DESCRIPTION("bq25980 charger driver");
1298 MODULE_LICENSE("GPL v2");