drivers/power/supply/bq2415x_charger.c

   1 /*
   2  * bq2415x charger driver
   3  *
   4  * Copyright (C) 2011-2013  Pali Rohár <pali.rohar@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * Datasheets:
  17  * http://www.ti.com/product/bq24150
  18  * http://www.ti.com/product/bq24150a
  19  * http://www.ti.com/product/bq24152
  20  * http://www.ti.com/product/bq24153
  21  * http://www.ti.com/product/bq24153a
  22  * http://www.ti.com/product/bq24155
  23  * http://www.ti.com/product/bq24157s
  24  * http://www.ti.com/product/bq24158
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/param.h>
  30 #include <linux/err.h>
  31 #include <linux/workqueue.h>
  32 #include <linux/sysfs.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/power_supply.h>
  35 #include <linux/idr.h>
  36 #include <linux/i2c.h>
  37 #include <linux/slab.h>
  38 #include <linux/acpi.h>
  39
  40 #include <linux/power/bq2415x_charger.h>
  41
  42 /* timeout for resetting chip timer */
  43 #define BQ2415X_TIMER_TIMEOUT           10
  44
  45 #define BQ2415X_REG_STATUS              0x00
  46 #define BQ2415X_REG_CONTROL             0x01
  47 #define BQ2415X_REG_VOLTAGE             0x02
  48 #define BQ2415X_REG_VENDER              0x03
  49 #define BQ2415X_REG_CURRENT             0x04
  50
  51 /* reset state for all registers */
  52 #define BQ2415X_RESET_STATUS            BIT(6)
  53 #define BQ2415X_RESET_CONTROL           (BIT(4)|BIT(5))
  54 #define BQ2415X_RESET_VOLTAGE           (BIT(1)|BIT(3))
  55 #define BQ2415X_RESET_CURRENT           (BIT(0)|BIT(3)|BIT(7))
  56
  57 /* status register */
  58 #define BQ2415X_BIT_TMR_RST             7
  59 #define BQ2415X_BIT_OTG                 7
  60 #define BQ2415X_BIT_EN_STAT             6
  61 #define BQ2415X_MASK_STAT               (BIT(4)|BIT(5))
  62 #define BQ2415X_SHIFT_STAT              4
  63 #define BQ2415X_BIT_BOOST               3
  64 #define BQ2415X_MASK_FAULT              (BIT(0)|BIT(1)|BIT(2))
  65 #define BQ2415X_SHIFT_FAULT             0
  66
  67 /* control register */
  68 #define BQ2415X_MASK_LIMIT              (BIT(6)|BIT(7))
  69 #define BQ2415X_SHIFT_LIMIT             6
  70 #define BQ2415X_MASK_VLOWV              (BIT(4)|BIT(5))
  71 #define BQ2415X_SHIFT_VLOWV             4
  72 #define BQ2415X_BIT_TE                  3
  73 #define BQ2415X_BIT_CE                  2
  74 #define BQ2415X_BIT_HZ_MODE             1
  75 #define BQ2415X_BIT_OPA_MODE            0
  76
  77 /* voltage register */
  78 #define BQ2415X_MASK_VO         (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
  79 #define BQ2415X_SHIFT_VO                2
  80 #define BQ2415X_BIT_OTG_PL              1
  81 #define BQ2415X_BIT_OTG_EN              0
  82
  83 /* vender register */
  84 #define BQ2415X_MASK_VENDER             (BIT(5)|BIT(6)|BIT(7))
  85 #define BQ2415X_SHIFT_VENDER            5
  86 #define BQ2415X_MASK_PN                 (BIT(3)|BIT(4))
  87 #define BQ2415X_SHIFT_PN                3
  88 #define BQ2415X_MASK_REVISION           (BIT(0)|BIT(1)|BIT(2))
  89 #define BQ2415X_SHIFT_REVISION          0
  90
  91 /* current register */
  92 #define BQ2415X_MASK_RESET              BIT(7)
  93 #define BQ2415X_MASK_VI_CHRG            (BIT(4)|BIT(5)|BIT(6))
  94 #define BQ2415X_SHIFT_VI_CHRG           4
  95 /* N/A                                  BIT(3) */
  96 #define BQ2415X_MASK_VI_TERM            (BIT(0)|BIT(1)|BIT(2))
  97 #define BQ2415X_SHIFT_VI_TERM           0
  98
  99
 100 enum bq2415x_command {
 101         BQ2415X_TIMER_RESET,
 102         BQ2415X_OTG_STATUS,
 103         BQ2415X_STAT_PIN_STATUS,
 104         BQ2415X_STAT_PIN_ENABLE,
 105         BQ2415X_STAT_PIN_DISABLE,
 106         BQ2415X_CHARGE_STATUS,
 107         BQ2415X_BOOST_STATUS,
 108         BQ2415X_FAULT_STATUS,
 109
 110         BQ2415X_CHARGE_TERMINATION_STATUS,
 111         BQ2415X_CHARGE_TERMINATION_ENABLE,
 112         BQ2415X_CHARGE_TERMINATION_DISABLE,
 113         BQ2415X_CHARGER_STATUS,
 114         BQ2415X_CHARGER_ENABLE,
 115         BQ2415X_CHARGER_DISABLE,
 116         BQ2415X_HIGH_IMPEDANCE_STATUS,
 117         BQ2415X_HIGH_IMPEDANCE_ENABLE,
 118         BQ2415X_HIGH_IMPEDANCE_DISABLE,
 119         BQ2415X_BOOST_MODE_STATUS,
 120         BQ2415X_BOOST_MODE_ENABLE,
 121         BQ2415X_BOOST_MODE_DISABLE,
 122
 123         BQ2415X_OTG_LEVEL,
 124         BQ2415X_OTG_ACTIVATE_HIGH,
 125         BQ2415X_OTG_ACTIVATE_LOW,
 126         BQ2415X_OTG_PIN_STATUS,
 127         BQ2415X_OTG_PIN_ENABLE,
 128         BQ2415X_OTG_PIN_DISABLE,
 129
 130         BQ2415X_VENDER_CODE,
 131         BQ2415X_PART_NUMBER,
 132         BQ2415X_REVISION,
 133 };
 134
 135 enum bq2415x_chip {
 136         BQUNKNOWN,
 137         BQ24150,
 138         BQ24150A,
 139         BQ24151,
 140         BQ24151A,
 141         BQ24152,
 142         BQ24153,
 143         BQ24153A,
 144         BQ24155,
 145         BQ24156,
 146         BQ24156A,
 147         BQ24157S,
 148         BQ24158,
 149 };
 150
 151 static char *bq2415x_chip_name[] = {
 152         "unknown",
 153         "bq24150",
 154         "bq24150a",
 155         "bq24151",
 156         "bq24151a",
 157         "bq24152",
 158         "bq24153",
 159         "bq24153a",
 160         "bq24155",
 161         "bq24156",
 162         "bq24156a",
 163         "bq24157s",
 164         "bq24158",
 165 };
 166
 167 struct bq2415x_device {
 168         struct device *dev;
 169         struct bq2415x_platform_data init_data;
 170         struct power_supply *charger;
 171         struct power_supply_desc charger_desc;
 172         struct delayed_work work;
 173         struct device_node *notify_node;
 174         struct notifier_block nb;
 175         enum bq2415x_mode reported_mode;/* mode reported by hook function */
 176         enum bq2415x_mode mode;         /* currently configured mode */
 177         enum bq2415x_chip chip;
 178         const char *timer_error;
 179         char *model;
 180         char *name;
 181         int autotimer;  /* 1 - if driver automatically reset timer, 0 - not */
 182         int automode;   /* 1 - enabled, 0 - disabled; -1 - not supported */
 183         int id;
 184 };
 185
 186 /* each registered chip must have unique id */
 187 static DEFINE_IDR(bq2415x_id);
 188
 189 static DEFINE_MUTEX(bq2415x_id_mutex);
 190 static DEFINE_MUTEX(bq2415x_timer_mutex);
 191 static DEFINE_MUTEX(bq2415x_i2c_mutex);
 192
 193 /**** i2c read functions ****/
 194
 195 /* read value from register */
 196 static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
 197 {
 198         struct i2c_client *client = to_i2c_client(bq->dev);
 199         struct i2c_msg msg[2];
 200         u8 val;
 201         int ret;
 202
 203         if (!client->adapter)
 204                 return -ENODEV;
 205
 206         msg[0].addr = client->addr;
 207         msg[0].flags = 0;
 208         msg[0].buf = &reg;
 209         msg[0].len = sizeof(reg);
 210         msg[1].addr = client->addr;
 211         msg[1].flags = I2C_M_RD;
 212         msg[1].buf = &val;
 213         msg[1].len = sizeof(val);
 214
 215         mutex_lock(&bq2415x_i2c_mutex);
 216         ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
 217         mutex_unlock(&bq2415x_i2c_mutex);
 218
 219         if (ret < 0)
 220                 return ret;
 221
 222         return val;
 223 }
 224
 225 /* read value from register, apply mask and right shift it */
 226 static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
 227                                  u8 mask, u8 shift)
 228 {
 229         int ret;
 230
 231         if (shift > 8)
 232                 return -EINVAL;
 233
 234         ret = bq2415x_i2c_read(bq, reg);
 235         if (ret < 0)
 236                 return ret;
 237         return (ret & mask) >> shift;
 238 }
 239
 240 /* read value from register and return one specified bit */
 241 static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
 242 {
 243         if (bit > 8)
 244                 return -EINVAL;
 245         return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
 246 }
 247
 248 /**** i2c write functions ****/
 249
 250 /* write value to register */
 251 static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
 252 {
 253         struct i2c_client *client = to_i2c_client(bq->dev);
 254         struct i2c_msg msg[1];
 255         u8 data[2];
 256         int ret;
 257
 258         data[0] = reg;
 259         data[1] = val;
 260
 261         msg[0].addr = client->addr;
 262         msg[0].flags = 0;
 263         msg[0].buf = data;
 264         msg[0].len = ARRAY_SIZE(data);
 265
 266         mutex_lock(&bq2415x_i2c_mutex);
 267         ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
 268         mutex_unlock(&bq2415x_i2c_mutex);
 269
 270         /* i2c_transfer returns number of messages transferred */
 271         if (ret < 0)
 272                 return ret;
 273         else if (ret != 1)
 274                 return -EIO;
 275
 276         return 0;
 277 }
 278
 279 /* read value from register, change it with mask left shifted and write back */
 280 static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
 281                                   u8 mask, u8 shift)
 282 {
 283         int ret;
 284
 285         if (shift > 8)
 286                 return -EINVAL;
 287
 288         ret = bq2415x_i2c_read(bq, reg);
 289         if (ret < 0)
 290                 return ret;
 291
 292         ret &= ~mask;
 293         ret |= val << shift;
 294
 295         return bq2415x_i2c_write(bq, reg, ret);
 296 }
 297
 298 /* change only one bit in register */
 299 static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
 300                                  bool val, u8 bit)
 301 {
 302         if (bit > 8)
 303                 return -EINVAL;
 304         return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
 305 }
 306
 307 /**** global functions ****/
 308
 309 /* exec command function */
 310 static int bq2415x_exec_command(struct bq2415x_device *bq,
 311                                 enum bq2415x_command command)
 312 {
 313         int ret;
 314
 315         switch (command) {
 316         case BQ2415X_TIMER_RESET:
 317                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
 318                                 1, BQ2415X_BIT_TMR_RST);
 319         case BQ2415X_OTG_STATUS:
 320                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
 321                                 BQ2415X_BIT_OTG);
 322         case BQ2415X_STAT_PIN_STATUS:
 323                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
 324                                 BQ2415X_BIT_EN_STAT);
 325         case BQ2415X_STAT_PIN_ENABLE:
 326                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
 327                                 BQ2415X_BIT_EN_STAT);
 328         case BQ2415X_STAT_PIN_DISABLE:
 329                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
 330                                 BQ2415X_BIT_EN_STAT);
 331         case BQ2415X_CHARGE_STATUS:
 332                 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
 333                                 BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
 334         case BQ2415X_BOOST_STATUS:
 335                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
 336                                 BQ2415X_BIT_BOOST);
 337         case BQ2415X_FAULT_STATUS:
 338                 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
 339                         BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
 340
 341         case BQ2415X_CHARGE_TERMINATION_STATUS:
 342                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
 343                                 BQ2415X_BIT_TE);
 344         case BQ2415X_CHARGE_TERMINATION_ENABLE:
 345                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 346                                 1, BQ2415X_BIT_TE);
 347         case BQ2415X_CHARGE_TERMINATION_DISABLE:
 348                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 349                                 0, BQ2415X_BIT_TE);
 350         case BQ2415X_CHARGER_STATUS:
 351                 ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
 352                         BQ2415X_BIT_CE);
 353                 if (ret < 0)
 354                         return ret;
 355                 return ret > 0 ? 0 : 1;
 356         case BQ2415X_CHARGER_ENABLE:
 357                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 358                                 0, BQ2415X_BIT_CE);
 359         case BQ2415X_CHARGER_DISABLE:
 360                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 361                                 1, BQ2415X_BIT_CE);
 362         case BQ2415X_HIGH_IMPEDANCE_STATUS:
 363                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
 364                                 BQ2415X_BIT_HZ_MODE);
 365         case BQ2415X_HIGH_IMPEDANCE_ENABLE:
 366                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 367                                 1, BQ2415X_BIT_HZ_MODE);
 368         case BQ2415X_HIGH_IMPEDANCE_DISABLE:
 369                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 370                                 0, BQ2415X_BIT_HZ_MODE);
 371         case BQ2415X_BOOST_MODE_STATUS:
 372                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
 373                                 BQ2415X_BIT_OPA_MODE);
 374         case BQ2415X_BOOST_MODE_ENABLE:
 375                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 376                                 1, BQ2415X_BIT_OPA_MODE);
 377         case BQ2415X_BOOST_MODE_DISABLE:
 378                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 379                                 0, BQ2415X_BIT_OPA_MODE);
 380
 381         case BQ2415X_OTG_LEVEL:
 382                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
 383                                 BQ2415X_BIT_OTG_PL);
 384         case BQ2415X_OTG_ACTIVATE_HIGH:
 385                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
 386                                 1, BQ2415X_BIT_OTG_PL);
 387         case BQ2415X_OTG_ACTIVATE_LOW:
 388                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
 389                                 0, BQ2415X_BIT_OTG_PL);
 390         case BQ2415X_OTG_PIN_STATUS:
 391                 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
 392                                 BQ2415X_BIT_OTG_EN);
 393         case BQ2415X_OTG_PIN_ENABLE:
 394                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
 395                                 1, BQ2415X_BIT_OTG_EN);
 396         case BQ2415X_OTG_PIN_DISABLE:
 397                 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
 398                                 0, BQ2415X_BIT_OTG_EN);
 399
 400         case BQ2415X_VENDER_CODE:
 401                 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
 402                         BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
 403         case BQ2415X_PART_NUMBER:
 404                 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
 405                                 BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
 406         case BQ2415X_REVISION:
 407                 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
 408                         BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
 409         }
 410         return -EINVAL;
 411 }
 412
 413 /* detect chip type */
 414 static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
 415 {
 416         struct i2c_client *client = to_i2c_client(bq->dev);
 417         int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
 418
 419         if (ret < 0)
 420                 return ret;
 421
 422         switch (client->addr) {
 423         case 0x6b:
 424                 switch (ret) {
 425                 case 0:
 426                         if (bq->chip == BQ24151A)
 427                                 return bq->chip;
 428                         return BQ24151;
 429                 case 1:
 430                         if (bq->chip == BQ24150A ||
 431                                 bq->chip == BQ24152 ||
 432                                 bq->chip == BQ24155)
 433                                 return bq->chip;
 434                         return BQ24150;
 435                 case 2:
 436                         if (bq->chip == BQ24153A)
 437                                 return bq->chip;
 438                         return BQ24153;
 439                 default:
 440                         return BQUNKNOWN;
 441                 }
 442                 break;
 443
 444         case 0x6a:
 445                 switch (ret) {
 446                 case 0:
 447                         if (bq->chip == BQ24156A)
 448                                 return bq->chip;
 449                         return BQ24156;
 450                 case 2:
 451                         if (bq->chip == BQ24157S)
 452                                 return bq->chip;
 453                         return BQ24158;
 454                 default:
 455                         return BQUNKNOWN;
 456                 }
 457                 break;
 458         }
 459
 460         return BQUNKNOWN;
 461 }
 462
 463 /* detect chip revision */
 464 static int bq2415x_detect_revision(struct bq2415x_device *bq)
 465 {
 466         int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
 467         int chip = bq2415x_detect_chip(bq);
 468
 469         if (ret < 0 || chip < 0)
 470                 return -1;
 471
 472         switch (chip) {
 473         case BQ24150:
 474         case BQ24150A:
 475         case BQ24151:
 476         case BQ24151A:
 477         case BQ24152:
 478                 if (ret >= 0 && ret <= 3)
 479                         return ret;
 480                 return -1;
 481         case BQ24153:
 482         case BQ24153A:
 483         case BQ24156:
 484         case BQ24156A:
 485         case BQ24157S:
 486         case BQ24158:
 487                 if (ret == 3)
 488                         return 0;
 489                 else if (ret == 1)
 490                         return 1;
 491                 return -1;
 492         case BQ24155:
 493                 if (ret == 3)
 494                         return 3;
 495                 return -1;
 496         case BQUNKNOWN:
 497                 return -1;
 498         }
 499
 500         return -1;
 501 }
 502
 503 /* return chip vender code */
 504 static int bq2415x_get_vender_code(struct bq2415x_device *bq)
 505 {
 506         int ret;
 507
 508         ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
 509         if (ret < 0)
 510                 return 0;
 511
 512         /* convert to binary */
 513         return (ret & 0x1) +
 514                ((ret >> 1) & 0x1) * 10 +
 515                ((ret >> 2) & 0x1) * 100;
 516 }
 517
 518 /* reset all chip registers to default state */
 519 static void bq2415x_reset_chip(struct bq2415x_device *bq)
 520 {
 521         bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
 522         bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
 523         bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
 524         bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
 525         bq->timer_error = NULL;
 526 }
 527
 528 /**** properties functions ****/
 529
 530 /* set current limit in mA */
 531 static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
 532 {
 533         int val;
 534
 535         if (mA <= 100)
 536                 val = 0;
 537         else if (mA <= 500)
 538                 val = 1;
 539         else if (mA <= 800)
 540                 val = 2;
 541         else
 542                 val = 3;
 543
 544         return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
 545                         BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
 546 }
 547
 548 /* get current limit in mA */
 549 static int bq2415x_get_current_limit(struct bq2415x_device *bq)
 550 {
 551         int ret;
 552
 553         ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
 554                         BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
 555         if (ret < 0)
 556                 return ret;
 557         else if (ret == 0)
 558                 return 100;
 559         else if (ret == 1)
 560                 return 500;
 561         else if (ret == 2)
 562                 return 800;
 563         else if (ret == 3)
 564                 return 1800;
 565         return -EINVAL;
 566 }
 567
 568 /* set weak battery voltage in mV */
 569 static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
 570 {
 571         int val;
 572
 573         /* round to 100mV */
 574         if (mV <= 3400 + 50)
 575                 val = 0;
 576         else if (mV <= 3500 + 50)
 577                 val = 1;
 578         else if (mV <= 3600 + 50)
 579                 val = 2;
 580         else
 581                 val = 3;
 582
 583         return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
 584                         BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
 585 }
 586
 587 /* get weak battery voltage in mV */
 588 static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
 589 {
 590         int ret;
 591
 592         ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
 593                         BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
 594         if (ret < 0)
 595                 return ret;
 596         return 100 * (34 + ret);
 597 }
 598
 599 /* set battery regulation voltage in mV */
 600 static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
 601                                                   int mV)
 602 {
 603         int val = (mV/10 - 350) / 2;
 604
 605         /*
 606          * According to datasheet, maximum battery regulation voltage is
 607          * 4440mV which is b101111 = 47.
 608          */
 609         if (val < 0)
 610                 val = 0;
 611         else if (val > 47)
 612                 return -EINVAL;
 613
 614         return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
 615                         BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
 616 }
 617
 618 /* get battery regulation voltage in mV */
 619 static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
 620 {
 621         int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
 622                         BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
 623
 624         if (ret < 0)
 625                 return ret;
 626         return 10 * (350 + 2*ret);
 627 }
 628
 629 /* set charge current in mA (platform data must provide resistor sense) */
 630 static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
 631 {
 632         int val;
 633
 634         if (bq->init_data.resistor_sense <= 0)
 635                 return -EINVAL;
 636
 637         val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
 638         if (val < 0)
 639                 val = 0;
 640         else if (val > 7)
 641                 val = 7;
 642
 643         return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
 644                         BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET,
 645                         BQ2415X_SHIFT_VI_CHRG);
 646 }
 647
 648 /* get charge current in mA (platform data must provide resistor sense) */
 649 static int bq2415x_get_charge_current(struct bq2415x_device *bq)
 650 {
 651         int ret;
 652
 653         if (bq->init_data.resistor_sense <= 0)
 654                 return -EINVAL;
 655
 656         ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
 657                         BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
 658         if (ret < 0)
 659                 return ret;
 660         return (37400 + 6800*ret) / bq->init_data.resistor_sense;
 661 }
 662
 663 /* set termination current in mA (platform data must provide resistor sense) */
 664 static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
 665 {
 666         int val;
 667
 668         if (bq->init_data.resistor_sense <= 0)
 669                 return -EINVAL;
 670
 671         val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
 672         if (val < 0)
 673                 val = 0;
 674         else if (val > 7)
 675                 val = 7;
 676
 677         return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
 678                         BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET,
 679                         BQ2415X_SHIFT_VI_TERM);
 680 }
 681
 682 /* get termination current in mA (platform data must provide resistor sense) */
 683 static int bq2415x_get_termination_current(struct bq2415x_device *bq)
 684 {
 685         int ret;
 686
 687         if (bq->init_data.resistor_sense <= 0)
 688                 return -EINVAL;
 689
 690         ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
 691                         BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
 692         if (ret < 0)
 693                 return ret;
 694         return (3400 + 3400*ret) / bq->init_data.resistor_sense;
 695 }
 696
 697 /* set default value of property */
 698 #define bq2415x_set_default_value(bq, prop) \
 699         do { \
 700                 int ret = 0; \
 701                 if (bq->init_data.prop != -1) \
 702                         ret = bq2415x_set_##prop(bq, bq->init_data.prop); \
 703                 if (ret < 0) \
 704                         return ret; \
 705         } while (0)
 706
 707 /* set default values of all properties */
 708 static int bq2415x_set_defaults(struct bq2415x_device *bq)
 709 {
 710         bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
 711         bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
 712         bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE);
 713
 714         bq2415x_set_default_value(bq, current_limit);
 715         bq2415x_set_default_value(bq, weak_battery_voltage);
 716         bq2415x_set_default_value(bq, battery_regulation_voltage);
 717
 718         if (bq->init_data.resistor_sense > 0) {
 719                 bq2415x_set_default_value(bq, charge_current);
 720                 bq2415x_set_default_value(bq, termination_current);
 721                 bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
 722         }
 723
 724         bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
 725         return 0;
 726 }
 727
 728 /**** charger mode functions ****/
 729
 730 /* set charger mode */
 731 static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
 732 {
 733         int ret = 0;
 734         int charger = 0;
 735         int boost = 0;
 736
 737         if (mode == BQ2415X_MODE_BOOST)
 738                 boost = 1;
 739         else if (mode != BQ2415X_MODE_OFF)
 740                 charger = 1;
 741
 742         if (!charger)
 743                 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
 744
 745         if (!boost)
 746                 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
 747
 748         if (ret < 0)
 749                 return ret;
 750
 751         switch (mode) {
 752         case BQ2415X_MODE_OFF:
 753                 dev_dbg(bq->dev, "changing mode to: Offline\n");
 754                 ret = bq2415x_set_current_limit(bq, 100);
 755                 break;
 756         case BQ2415X_MODE_NONE:
 757                 dev_dbg(bq->dev, "changing mode to: N/A\n");
 758                 ret = bq2415x_set_current_limit(bq, 100);
 759                 break;
 760         case BQ2415X_MODE_HOST_CHARGER:
 761                 dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n");
 762                 ret = bq2415x_set_current_limit(bq, 500);
 763                 break;
 764         case BQ2415X_MODE_DEDICATED_CHARGER:
 765                 dev_dbg(bq->dev, "changing mode to: Dedicated charger\n");
 766                 ret = bq2415x_set_current_limit(bq, 1800);
 767                 break;
 768         case BQ2415X_MODE_BOOST: /* Boost mode */
 769                 dev_dbg(bq->dev, "changing mode to: Boost\n");
 770                 ret = bq2415x_set_current_limit(bq, 100);
 771                 break;
 772         }
 773
 774         if (ret < 0)
 775                 return ret;
 776
 777         if (charger)
 778                 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
 779         else if (boost)
 780                 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
 781
 782         if (ret < 0)
 783                 return ret;
 784
 785         bq2415x_set_default_value(bq, weak_battery_voltage);
 786         bq2415x_set_default_value(bq, battery_regulation_voltage);
 787
 788         bq->mode = mode;
 789         sysfs_notify(&bq->charger->dev.kobj, NULL, "mode");
 790
 791         return 0;
 792
 793 }
 794
 795 static bool bq2415x_update_reported_mode(struct bq2415x_device *bq, int mA)
 796 {
 797         enum bq2415x_mode mode;
 798
 799         if (mA == 0)
 800                 mode = BQ2415X_MODE_OFF;
 801         else if (mA < 500)
 802                 mode = BQ2415X_MODE_NONE;
 803         else if (mA < 1800)
 804                 mode = BQ2415X_MODE_HOST_CHARGER;
 805         else
 806                 mode = BQ2415X_MODE_DEDICATED_CHARGER;
 807
 808         if (bq->reported_mode == mode)
 809                 return false;
 810
 811         bq->reported_mode = mode;
 812         return true;
 813 }
 814
 815 static int bq2415x_notifier_call(struct notifier_block *nb,
 816                 unsigned long val, void *v)
 817 {
 818         struct bq2415x_device *bq =
 819                 container_of(nb, struct bq2415x_device, nb);
 820         struct power_supply *psy = v;
 821         union power_supply_propval prop;
 822         int ret;
 823
 824         if (val != PSY_EVENT_PROP_CHANGED)
 825                 return NOTIFY_OK;
 826
 827         /* Ignore event if it was not send by notify_node/notify_device */
 828         if (bq->notify_node) {
 829                 if (!psy->dev.parent ||
 830                     psy->dev.parent->of_node != bq->notify_node)
 831                         return NOTIFY_OK;
 832         } else if (bq->init_data.notify_device) {
 833                 if (strcmp(psy->desc->name, bq->init_data.notify_device) != 0)
 834                         return NOTIFY_OK;
 835         }
 836
 837         dev_dbg(bq->dev, "notifier call was called\n");
 838
 839         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX,
 840                         &prop);
 841         if (ret != 0)
 842                 return NOTIFY_OK;
 843
 844         if (!bq2415x_update_reported_mode(bq, prop.intval))
 845                 return NOTIFY_OK;
 846
 847         /* if automode is not enabled do not tell about reported_mode */
 848         if (bq->automode < 1)
 849                 return NOTIFY_OK;
 850
 851         schedule_delayed_work(&bq->work, 0);
 852
 853         return NOTIFY_OK;
 854 }
 855
 856 /**** timer functions ****/
 857
 858 /* enable/disable auto resetting chip timer */
 859 static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
 860 {
 861         mutex_lock(&bq2415x_timer_mutex);
 862
 863         if (bq->autotimer == state) {
 864                 mutex_unlock(&bq2415x_timer_mutex);
 865                 return;
 866         }
 867
 868         bq->autotimer = state;
 869
 870         if (state) {
 871                 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
 872                 bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
 873                 bq->timer_error = NULL;
 874         } else {
 875                 cancel_delayed_work_sync(&bq->work);
 876         }
 877
 878         mutex_unlock(&bq2415x_timer_mutex);
 879 }
 880
 881 /* called by bq2415x_timer_work on timer error */
 882 static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
 883 {
 884         bq->timer_error = msg;
 885         sysfs_notify(&bq->charger->dev.kobj, NULL, "timer");
 886         dev_err(bq->dev, "%s\n", msg);
 887         if (bq->automode > 0)
 888                 bq->automode = 0;
 889         bq2415x_set_mode(bq, BQ2415X_MODE_OFF);
 890         bq2415x_set_autotimer(bq, 0);
 891 }
 892
 893 /* delayed work function for auto resetting chip timer */
 894 static void bq2415x_timer_work(struct work_struct *work)
 895 {
 896         struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
 897                                                  work.work);
 898         int ret;
 899         int error;
 900         int boost;
 901
 902         if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
 903                 sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
 904                 bq2415x_set_mode(bq, bq->reported_mode);
 905         }
 906
 907         if (!bq->autotimer)
 908                 return;
 909
 910         ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
 911         if (ret < 0) {
 912                 bq2415x_timer_error(bq, "Resetting timer failed");
 913                 return;
 914         }
 915
 916         boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
 917         if (boost < 0) {
 918                 bq2415x_timer_error(bq, "Unknown error");
 919                 return;
 920         }
 921
 922         error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
 923         if (error < 0) {
 924                 bq2415x_timer_error(bq, "Unknown error");
 925                 return;
 926         }
 927
 928         if (boost) {
 929                 switch (error) {
 930                 /* Non fatal errors, chip is OK */
 931                 case 0: /* No error */
 932                         break;
 933                 case 6: /* Timer expired */
 934                         dev_err(bq->dev, "Timer expired\n");
 935                         break;
 936                 case 3: /* Battery voltage too low */
 937                         dev_err(bq->dev, "Battery voltage to low\n");
 938                         break;
 939
 940                 /* Fatal errors, disable and reset chip */
 941                 case 1: /* Overvoltage protection (chip fried) */
 942                         bq2415x_timer_error(bq,
 943                                 "Overvoltage protection (chip fried)");
 944                         return;
 945                 case 2: /* Overload */
 946                         bq2415x_timer_error(bq, "Overload");
 947                         return;
 948                 case 4: /* Battery overvoltage protection */
 949                         bq2415x_timer_error(bq,
 950                                 "Battery overvoltage protection");
 951                         return;
 952                 case 5: /* Thermal shutdown (too hot) */
 953                         bq2415x_timer_error(bq,
 954                                         "Thermal shutdown (too hot)");
 955                         return;
 956                 case 7: /* N/A */
 957                         bq2415x_timer_error(bq, "Unknown error");
 958                         return;
 959                 }
 960         } else {
 961                 switch (error) {
 962                 /* Non fatal errors, chip is OK */
 963                 case 0: /* No error */
 964                         break;
 965                 case 2: /* Sleep mode */
 966                         dev_err(bq->dev, "Sleep mode\n");
 967                         break;
 968                 case 3: /* Poor input source */
 969                         dev_err(bq->dev, "Poor input source\n");
 970                         break;
 971                 case 6: /* Timer expired */
 972                         dev_err(bq->dev, "Timer expired\n");
 973                         break;
 974                 case 7: /* No battery */
 975                         dev_err(bq->dev, "No battery\n");
 976                         break;
 977
 978                 /* Fatal errors, disable and reset chip */
 979                 case 1: /* Overvoltage protection (chip fried) */
 980                         bq2415x_timer_error(bq,
 981                                 "Overvoltage protection (chip fried)");
 982                         return;
 983                 case 4: /* Battery overvoltage protection */
 984                         bq2415x_timer_error(bq,
 985                                 "Battery overvoltage protection");
 986                         return;
 987                 case 5: /* Thermal shutdown (too hot) */
 988                         bq2415x_timer_error(bq,
 989                                 "Thermal shutdown (too hot)");
 990                         return;
 991                 }
 992         }
 993
 994         schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
 995 }
 996
 997 /**** power supply interface code ****/
 998
 999 static enum power_supply_property bq2415x_power_supply_props[] = {
1000         /* TODO: maybe add more power supply properties */
1001         POWER_SUPPLY_PROP_STATUS,
1002         POWER_SUPPLY_PROP_MODEL_NAME,
1003 };
1004
1005 static int bq2415x_power_supply_get_property(struct power_supply *psy,
1006                                              enum power_supply_property psp,
1007                                              union power_supply_propval *val)
1008 {
1009         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1010         int ret;
1011
1012         switch (psp) {
1013         case POWER_SUPPLY_PROP_STATUS:
1014                 ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
1015                 if (ret < 0)
1016                         return ret;
1017                 else if (ret == 0) /* Ready */
1018                         val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1019                 else if (ret == 1) /* Charge in progress */
1020                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
1021                 else if (ret == 2) /* Charge done */
1022                         val->intval = POWER_SUPPLY_STATUS_FULL;
1023                 else
1024                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
1025                 break;
1026         case POWER_SUPPLY_PROP_MODEL_NAME:
1027                 val->strval = bq->model;
1028                 break;
1029         default:
1030                 return -EINVAL;
1031         }
1032         return 0;
1033 }
1034
1035 static int bq2415x_power_supply_init(struct bq2415x_device *bq)
1036 {
1037         int ret;
1038         int chip;
1039         char revstr[8];
1040         struct power_supply_config psy_cfg = {
1041                 .drv_data = bq,
1042                 .of_node = bq->dev->of_node,
1043         };
1044
1045         bq->charger_desc.name = bq->name;
1046         bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
1047         bq->charger_desc.properties = bq2415x_power_supply_props;
1048         bq->charger_desc.num_properties =
1049                         ARRAY_SIZE(bq2415x_power_supply_props);
1050         bq->charger_desc.get_property = bq2415x_power_supply_get_property;
1051
1052         ret = bq2415x_detect_chip(bq);
1053         if (ret < 0)
1054                 chip = BQUNKNOWN;
1055         else
1056                 chip = ret;
1057
1058         ret = bq2415x_detect_revision(bq);
1059         if (ret < 0)
1060                 strcpy(revstr, "unknown");
1061         else
1062                 sprintf(revstr, "1.%d", ret);
1063
1064         bq->model = kasprintf(GFP_KERNEL,
1065                                 "chip %s, revision %s, vender code %.3d",
1066                                 bq2415x_chip_name[chip], revstr,
1067                                 bq2415x_get_vender_code(bq));
1068         if (!bq->model) {
1069                 dev_err(bq->dev, "failed to allocate model name\n");
1070                 return -ENOMEM;
1071         }
1072
1073         bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
1074                                             &psy_cfg);
1075         if (IS_ERR(bq->charger)) {
1076                 kfree(bq->model);
1077                 return PTR_ERR(bq->charger);
1078         }
1079
1080         return 0;
1081 }
1082
1083 static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
1084 {
1085         bq->autotimer = 0;
1086         if (bq->automode > 0)
1087                 bq->automode = 0;
1088         cancel_delayed_work_sync(&bq->work);
1089         power_supply_unregister(bq->charger);
1090         kfree(bq->model);
1091 }
1092
1093 /**** additional sysfs entries for power supply interface ****/
1094
1095 /* show *_status entries */
1096 static ssize_t bq2415x_sysfs_show_status(struct device *dev,
1097                                          struct device_attribute *attr,
1098                                          char *buf)
1099 {
1100         struct power_supply *psy = dev_get_drvdata(dev);
1101         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1102         enum bq2415x_command command;
1103         int ret;
1104
1105         if (strcmp(attr->attr.name, "otg_status") == 0)
1106                 command = BQ2415X_OTG_STATUS;
1107         else if (strcmp(attr->attr.name, "charge_status") == 0)
1108                 command = BQ2415X_CHARGE_STATUS;
1109         else if (strcmp(attr->attr.name, "boost_status") == 0)
1110                 command = BQ2415X_BOOST_STATUS;
1111         else if (strcmp(attr->attr.name, "fault_status") == 0)
1112                 command = BQ2415X_FAULT_STATUS;
1113         else
1114                 return -EINVAL;
1115
1116         ret = bq2415x_exec_command(bq, command);
1117         if (ret < 0)
1118                 return ret;
1119         return sprintf(buf, "%d\n", ret);
1120 }
1121
1122 /*
1123  * set timer entry:
1124  *    auto - enable auto mode
1125  *    off - disable auto mode
1126  *    (other values) - reset chip timer
1127  */
1128 static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1129                                        struct device_attribute *attr,
1130                                        const char *buf,
1131                                        size_t count)
1132 {
1133         struct power_supply *psy = dev_get_drvdata(dev);
1134         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1135         int ret = 0;
1136
1137         if (strncmp(buf, "auto", 4) == 0)
1138                 bq2415x_set_autotimer(bq, 1);
1139         else if (strncmp(buf, "off", 3) == 0)
1140                 bq2415x_set_autotimer(bq, 0);
1141         else
1142                 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1143
1144         if (ret < 0)
1145                 return ret;
1146         return count;
1147 }
1148
1149 /* show timer entry (auto or off) */
1150 static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1151                                         struct device_attribute *attr,
1152                                         char *buf)
1153 {
1154         struct power_supply *psy = dev_get_drvdata(dev);
1155         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1156
1157         if (bq->timer_error)
1158                 return sprintf(buf, "%s\n", bq->timer_error);
1159
1160         if (bq->autotimer)
1161                 return sprintf(buf, "auto\n");
1162         return sprintf(buf, "off\n");
1163 }
1164
1165 /*
1166  * set mode entry:
1167  *    auto - if automode is supported, enable it and set mode to reported
1168  *    none - disable charger and boost mode
1169  *    host - charging mode for host/hub chargers (current limit 500mA)
1170  *    dedicated - charging mode for dedicated chargers (unlimited current limit)
1171  *    boost - disable charger and enable boost mode
1172  */
1173 static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1174                                       struct device_attribute *attr,
1175                                       const char *buf,
1176                                       size_t count)
1177 {
1178         struct power_supply *psy = dev_get_drvdata(dev);
1179         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1180         enum bq2415x_mode mode;
1181         int ret = 0;
1182
1183         if (strncmp(buf, "auto", 4) == 0) {
1184                 if (bq->automode < 0)
1185                         return -EINVAL;
1186                 bq->automode = 1;
1187                 mode = bq->reported_mode;
1188         } else if (strncmp(buf, "off", 3) == 0) {
1189                 if (bq->automode > 0)
1190                         bq->automode = 0;
1191                 mode = BQ2415X_MODE_OFF;
1192         } else if (strncmp(buf, "none", 4) == 0) {
1193                 if (bq->automode > 0)
1194                         bq->automode = 0;
1195                 mode = BQ2415X_MODE_NONE;
1196         } else if (strncmp(buf, "host", 4) == 0) {
1197                 if (bq->automode > 0)
1198                         bq->automode = 0;
1199                 mode = BQ2415X_MODE_HOST_CHARGER;
1200         } else if (strncmp(buf, "dedicated", 9) == 0) {
1201                 if (bq->automode > 0)
1202                         bq->automode = 0;
1203                 mode = BQ2415X_MODE_DEDICATED_CHARGER;
1204         } else if (strncmp(buf, "boost", 5) == 0) {
1205                 if (bq->automode > 0)
1206                         bq->automode = 0;
1207                 mode = BQ2415X_MODE_BOOST;
1208         } else if (strncmp(buf, "reset", 5) == 0) {
1209                 bq2415x_reset_chip(bq);
1210                 bq2415x_set_defaults(bq);
1211                 if (bq->automode <= 0)
1212                         return count;
1213                 bq->automode = 1;
1214                 mode = bq->reported_mode;
1215         } else {
1216                 return -EINVAL;
1217         }
1218
1219         ret = bq2415x_set_mode(bq, mode);
1220         if (ret < 0)
1221                 return ret;
1222         return count;
1223 }
1224
1225 /* show mode entry (auto, none, host, dedicated or boost) */
1226 static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1227                                        struct device_attribute *attr,
1228                                        char *buf)
1229 {
1230         struct power_supply *psy = dev_get_drvdata(dev);
1231         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1232         ssize_t ret = 0;
1233
1234         if (bq->automode > 0)
1235                 ret += sprintf(buf+ret, "auto (");
1236
1237         switch (bq->mode) {
1238         case BQ2415X_MODE_OFF:
1239                 ret += sprintf(buf+ret, "off");
1240                 break;
1241         case BQ2415X_MODE_NONE:
1242                 ret += sprintf(buf+ret, "none");
1243                 break;
1244         case BQ2415X_MODE_HOST_CHARGER:
1245                 ret += sprintf(buf+ret, "host");
1246                 break;
1247         case BQ2415X_MODE_DEDICATED_CHARGER:
1248                 ret += sprintf(buf+ret, "dedicated");
1249                 break;
1250         case BQ2415X_MODE_BOOST:
1251                 ret += sprintf(buf+ret, "boost");
1252                 break;
1253         }
1254
1255         if (bq->automode > 0)
1256                 ret += sprintf(buf+ret, ")");
1257
1258         ret += sprintf(buf+ret, "\n");
1259         return ret;
1260 }
1261
1262 /* show reported_mode entry (none, host, dedicated or boost) */
1263 static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
1264                                                 struct device_attribute *attr,
1265                                                 char *buf)
1266 {
1267         struct power_supply *psy = dev_get_drvdata(dev);
1268         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1269
1270         if (bq->automode < 0)
1271                 return -EINVAL;
1272
1273         switch (bq->reported_mode) {
1274         case BQ2415X_MODE_OFF:
1275                 return sprintf(buf, "off\n");
1276         case BQ2415X_MODE_NONE:
1277                 return sprintf(buf, "none\n");
1278         case BQ2415X_MODE_HOST_CHARGER:
1279                 return sprintf(buf, "host\n");
1280         case BQ2415X_MODE_DEDICATED_CHARGER:
1281                 return sprintf(buf, "dedicated\n");
1282         case BQ2415X_MODE_BOOST:
1283                 return sprintf(buf, "boost\n");
1284         }
1285
1286         return -EINVAL;
1287 }
1288
1289 /* directly set raw value to chip register, format: 'register value' */
1290 static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1291                                            struct device_attribute *attr,
1292                                            const char *buf,
1293                                            size_t count)
1294 {
1295         struct power_supply *psy = dev_get_drvdata(dev);
1296         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1297         ssize_t ret = 0;
1298         unsigned int reg;
1299         unsigned int val;
1300
1301         if (sscanf(buf, "%x %x", &reg, &val) != 2)
1302                 return -EINVAL;
1303
1304         if (reg > 4 || val > 255)
1305                 return -EINVAL;
1306
1307         ret = bq2415x_i2c_write(bq, reg, val);
1308         if (ret < 0)
1309                 return ret;
1310         return count;
1311 }
1312
1313 /* print value of chip register, format: 'register=value' */
1314 static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1315                                        u8 reg,
1316                                        char *buf)
1317 {
1318         int ret = bq2415x_i2c_read(bq, reg);
1319
1320         if (ret < 0)
1321                 return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1322         return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1323 }
1324
1325 /* show all raw values of chip register, format per line: 'register=value' */
1326 static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1327                                             struct device_attribute *attr,
1328                                             char *buf)
1329 {
1330         struct power_supply *psy = dev_get_drvdata(dev);
1331         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1332         ssize_t ret = 0;
1333
1334         ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1335         ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1336         ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1337         ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1338         ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1339         return ret;
1340 }
1341
1342 /* set current and voltage limit entries (in mA or mV) */
1343 static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1344                                        struct device_attribute *attr,
1345                                        const char *buf,
1346                                        size_t count)
1347 {
1348         struct power_supply *psy = dev_get_drvdata(dev);
1349         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1350         long val;
1351         int ret;
1352
1353         if (kstrtol(buf, 10, &val) < 0)
1354                 return -EINVAL;
1355
1356         if (strcmp(attr->attr.name, "current_limit") == 0)
1357                 ret = bq2415x_set_current_limit(bq, val);
1358         else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1359                 ret = bq2415x_set_weak_battery_voltage(bq, val);
1360         else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1361                 ret = bq2415x_set_battery_regulation_voltage(bq, val);
1362         else if (strcmp(attr->attr.name, "charge_current") == 0)
1363                 ret = bq2415x_set_charge_current(bq, val);
1364         else if (strcmp(attr->attr.name, "termination_current") == 0)
1365                 ret = bq2415x_set_termination_current(bq, val);
1366         else
1367                 return -EINVAL;
1368
1369         if (ret < 0)
1370                 return ret;
1371         return count;
1372 }
1373
1374 /* show current and voltage limit entries (in mA or mV) */
1375 static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1376                                         struct device_attribute *attr,
1377                                         char *buf)
1378 {
1379         struct power_supply *psy = dev_get_drvdata(dev);
1380         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1381         int ret;
1382
1383         if (strcmp(attr->attr.name, "current_limit") == 0)
1384                 ret = bq2415x_get_current_limit(bq);
1385         else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1386                 ret = bq2415x_get_weak_battery_voltage(bq);
1387         else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1388                 ret = bq2415x_get_battery_regulation_voltage(bq);
1389         else if (strcmp(attr->attr.name, "charge_current") == 0)
1390                 ret = bq2415x_get_charge_current(bq);
1391         else if (strcmp(attr->attr.name, "termination_current") == 0)
1392                 ret = bq2415x_get_termination_current(bq);
1393         else
1394                 return -EINVAL;
1395
1396         if (ret < 0)
1397                 return ret;
1398         return sprintf(buf, "%d\n", ret);
1399 }
1400
1401 /* set *_enable entries */
1402 static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1403                                         struct device_attribute *attr,
1404                                         const char *buf,
1405                                         size_t count)
1406 {
1407         struct power_supply *psy = dev_get_drvdata(dev);
1408         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1409         enum bq2415x_command command;
1410         long val;
1411         int ret;
1412
1413         if (kstrtol(buf, 10, &val) < 0)
1414                 return -EINVAL;
1415
1416         if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1417                 command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1418                         BQ2415X_CHARGE_TERMINATION_DISABLE;
1419         else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1420                 command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1421                         BQ2415X_HIGH_IMPEDANCE_DISABLE;
1422         else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1423                 command = val ? BQ2415X_OTG_PIN_ENABLE :
1424                         BQ2415X_OTG_PIN_DISABLE;
1425         else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1426                 command = val ? BQ2415X_STAT_PIN_ENABLE :
1427                         BQ2415X_STAT_PIN_DISABLE;
1428         else
1429                 return -EINVAL;
1430
1431         ret = bq2415x_exec_command(bq, command);
1432         if (ret < 0)
1433                 return ret;
1434         return count;
1435 }
1436
1437 /* show *_enable entries */
1438 static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1439                                          struct device_attribute *attr,
1440                                          char *buf)
1441 {
1442         struct power_supply *psy = dev_get_drvdata(dev);
1443         struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1444         enum bq2415x_command command;
1445         int ret;
1446
1447         if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1448                 command = BQ2415X_CHARGE_TERMINATION_STATUS;
1449         else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1450                 command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1451         else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1452                 command = BQ2415X_OTG_PIN_STATUS;
1453         else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1454                 command = BQ2415X_STAT_PIN_STATUS;
1455         else
1456                 return -EINVAL;
1457
1458         ret = bq2415x_exec_command(bq, command);
1459         if (ret < 0)
1460                 return ret;
1461         return sprintf(buf, "%d\n", ret);
1462 }
1463
1464 static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1465                 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1466 static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1467                 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1468 static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1469                 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1470 static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1471                 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1472 static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1473                 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1474
1475 static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1476                 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1477 static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1478                 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1479 static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1480                 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1481 static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1482                 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1483
1484 static DEVICE_ATTR(reported_mode, S_IRUGO,
1485                 bq2415x_sysfs_show_reported_mode, NULL);
1486 static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1487                 bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1488 static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1489                 bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1490
1491 static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1492                 bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1493
1494 static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1495 static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1496 static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1497 static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1498
1499 static struct attribute *bq2415x_sysfs_attributes[] = {
1500         /*
1501          * TODO: some (appropriate) of these attrs should be switched to
1502          * use power supply class props.
1503          */
1504         &dev_attr_current_limit.attr,
1505         &dev_attr_weak_battery_voltage.attr,
1506         &dev_attr_battery_regulation_voltage.attr,
1507         &dev_attr_charge_current.attr,
1508         &dev_attr_termination_current.attr,
1509
1510         &dev_attr_charge_termination_enable.attr,
1511         &dev_attr_high_impedance_enable.attr,
1512         &dev_attr_otg_pin_enable.attr,
1513         &dev_attr_stat_pin_enable.attr,
1514
1515         &dev_attr_reported_mode.attr,
1516         &dev_attr_mode.attr,
1517         &dev_attr_timer.attr,
1518
1519         &dev_attr_registers.attr,
1520
1521         &dev_attr_otg_status.attr,
1522         &dev_attr_charge_status.attr,
1523         &dev_attr_boost_status.attr,
1524         &dev_attr_fault_status.attr,
1525         NULL,
1526 };
1527
1528 static const struct attribute_group bq2415x_sysfs_attr_group = {
1529         .attrs = bq2415x_sysfs_attributes,
1530 };
1531
1532 static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1533 {
1534         return sysfs_create_group(&bq->charger->dev.kobj,
1535                         &bq2415x_sysfs_attr_group);
1536 }
1537
1538 static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1539 {
1540         sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group);
1541 }
1542
1543 /* main bq2415x probe function */
1544 static int bq2415x_probe(struct i2c_client *client,
1545                          const struct i2c_device_id *id)
1546 {
1547         int ret;
1548         int num;
1549         char *name = NULL;
1550         struct bq2415x_device *bq;
1551         struct device_node *np = client->dev.of_node;
1552         struct bq2415x_platform_data *pdata = client->dev.platform_data;
1553         const struct acpi_device_id *acpi_id = NULL;
1554         struct power_supply *notify_psy = NULL;
1555         union power_supply_propval prop;
1556
1557         if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
1558                 dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
1559                 return -ENODEV;
1560         }
1561
1562         /* Get new ID for the new device */
1563         mutex_lock(&bq2415x_id_mutex);
1564         num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
1565         mutex_unlock(&bq2415x_id_mutex);
1566         if (num < 0)
1567                 return num;
1568
1569         if (id) {
1570                 name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1571         } else if (ACPI_HANDLE(&client->dev)) {
1572                 acpi_id =
1573                         acpi_match_device(client->dev.driver->acpi_match_table,
1574                                           &client->dev);
1575                 if (!acpi_id) {
1576                         dev_err(&client->dev, "failed to match device name\n");
1577                         ret = -ENODEV;
1578                         goto error_1;
1579                 }
1580                 name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
1581         }
1582         if (!name) {
1583                 dev_err(&client->dev, "failed to allocate device name\n");
1584                 ret = -ENOMEM;
1585                 goto error_1;
1586         }
1587
1588         bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
1589         if (!bq) {
1590                 ret = -ENOMEM;
1591                 goto error_2;
1592         }
1593
1594         i2c_set_clientdata(client, bq);
1595
1596         bq->id = num;
1597         bq->dev = &client->dev;
1598         if (id)
1599                 bq->chip = id->driver_data;
1600         else if (ACPI_HANDLE(bq->dev))
1601                 bq->chip = acpi_id->driver_data;
1602         bq->name = name;
1603         bq->mode = BQ2415X_MODE_OFF;
1604         bq->reported_mode = BQ2415X_MODE_OFF;
1605         bq->autotimer = 0;
1606         bq->automode = 0;
1607
1608         if (np || ACPI_HANDLE(bq->dev)) {
1609                 ret = device_property_read_u32(bq->dev,
1610                                                "ti,current-limit",
1611                                                &bq->init_data.current_limit);
1612                 if (ret)
1613                         goto error_2;
1614                 ret = device_property_read_u32(bq->dev,
1615                                         "ti,weak-battery-voltage",
1616                                         &bq->init_data.weak_battery_voltage);
1617                 if (ret)
1618                         goto error_2;
1619                 ret = device_property_read_u32(bq->dev,
1620                                 "ti,battery-regulation-voltage",
1621                                 &bq->init_data.battery_regulation_voltage);
1622                 if (ret)
1623                         goto error_2;
1624                 ret = device_property_read_u32(bq->dev,
1625                                                "ti,charge-current",
1626                                                &bq->init_data.charge_current);
1627                 if (ret)
1628                         goto error_2;
1629                 ret = device_property_read_u32(bq->dev,
1630                                 "ti,termination-current",
1631                                 &bq->init_data.termination_current);
1632                 if (ret)
1633                         goto error_2;
1634                 ret = device_property_read_u32(bq->dev,
1635                                                "ti,resistor-sense",
1636                                                &bq->init_data.resistor_sense);
1637                 if (ret)
1638                         goto error_2;
1639                 if (np)
1640                         bq->notify_node = of_parse_phandle(np,
1641                                                 "ti,usb-charger-detection", 0);
1642         } else {
1643                 memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
1644         }
1645
1646         bq2415x_reset_chip(bq);
1647
1648         ret = bq2415x_power_supply_init(bq);
1649         if (ret) {
1650                 dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1651                 goto error_2;
1652         }
1653
1654         ret = bq2415x_sysfs_init(bq);
1655         if (ret) {
1656                 dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1657                 goto error_3;
1658         }
1659
1660         ret = bq2415x_set_defaults(bq);
1661         if (ret) {
1662                 dev_err(bq->dev, "failed to set default values: %d\n", ret);
1663                 goto error_4;
1664         }
1665
1666         if (bq->notify_node || bq->init_data.notify_device) {
1667                 bq->nb.notifier_call = bq2415x_notifier_call;
1668                 ret = power_supply_reg_notifier(&bq->nb);
1669                 if (ret) {
1670                         dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
1671                         goto error_4;
1672                 }
1673
1674                 bq->automode = 1;
1675                 dev_info(bq->dev, "automode supported, waiting for events\n");
1676         } else {
1677                 bq->automode = -1;
1678                 dev_info(bq->dev, "automode not supported\n");
1679         }
1680
1681         /* Query for initial reported_mode and set it */
1682         if (bq->nb.notifier_call) {
1683                 if (np) {
1684                         notify_psy = power_supply_get_by_phandle(np,
1685                                                 "ti,usb-charger-detection");
1686                         if (IS_ERR(notify_psy))
1687                                 notify_psy = NULL;
1688                 } else if (bq->init_data.notify_device) {
1689                         notify_psy = power_supply_get_by_name(
1690                                                 bq->init_data.notify_device);
1691                 }
1692         }
1693         if (notify_psy) {
1694                 ret = power_supply_get_property(notify_psy,
1695                                         POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
1696                 power_supply_put(notify_psy);
1697
1698                 if (ret == 0) {
1699                         bq2415x_update_reported_mode(bq, prop.intval);
1700                         bq2415x_set_mode(bq, bq->reported_mode);
1701                 }
1702         }
1703
1704         INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1705         bq2415x_set_autotimer(bq, 1);
1706
1707         dev_info(bq->dev, "driver registered\n");
1708         return 0;
1709
1710 error_4:
1711         bq2415x_sysfs_exit(bq);
1712 error_3:
1713         bq2415x_power_supply_exit(bq);
1714 error_2:
1715         if (bq)
1716                 of_node_put(bq->notify_node);
1717         kfree(name);
1718 error_1:
1719         mutex_lock(&bq2415x_id_mutex);
1720         idr_remove(&bq2415x_id, num);
1721         mutex_unlock(&bq2415x_id_mutex);
1722
1723         return ret;
1724 }
1725
1726 /* main bq2415x remove function */
1727
1728 static int bq2415x_remove(struct i2c_client *client)
1729 {
1730         struct bq2415x_device *bq = i2c_get_clientdata(client);
1731
1732         if (bq->nb.notifier_call)
1733                 power_supply_unreg_notifier(&bq->nb);
1734
1735         of_node_put(bq->notify_node);
1736         bq2415x_sysfs_exit(bq);
1737         bq2415x_power_supply_exit(bq);
1738
1739         bq2415x_reset_chip(bq);
1740
1741         mutex_lock(&bq2415x_id_mutex);
1742         idr_remove(&bq2415x_id, bq->id);
1743         mutex_unlock(&bq2415x_id_mutex);
1744
1745         dev_info(bq->dev, "driver unregistered\n");
1746
1747         kfree(bq->name);
1748
1749         return 0;
1750 }
1751
1752 static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1753         { "bq2415x", BQUNKNOWN },
1754         { "bq24150", BQ24150 },
1755         { "bq24150a", BQ24150A },
1756         { "bq24151", BQ24151 },
1757         { "bq24151a", BQ24151A },
1758         { "bq24152", BQ24152 },
1759         { "bq24153", BQ24153 },
1760         { "bq24153a", BQ24153A },
1761         { "bq24155", BQ24155 },
1762         { "bq24156", BQ24156 },
1763         { "bq24156a", BQ24156A },
1764         { "bq24157s", BQ24157S },
1765         { "bq24158", BQ24158 },
1766         {},
1767 };
1768 MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1769
1770 #ifdef CONFIG_ACPI
1771 static const struct acpi_device_id bq2415x_i2c_acpi_match[] = {
1772         { "BQ2415X", BQUNKNOWN },
1773         { "BQ241500", BQ24150 },
1774         { "BQA24150", BQ24150A },
1775         { "BQ241510", BQ24151 },
1776         { "BQA24151", BQ24151A },
1777         { "BQ241520", BQ24152 },
1778         { "BQ241530", BQ24153 },
1779         { "BQA24153", BQ24153A },
1780         { "BQ241550", BQ24155 },
1781         { "BQ241560", BQ24156 },
1782         { "BQA24156", BQ24156A },
1783         { "BQS24157", BQ24157S },
1784         { "BQ241580", BQ24158 },
1785         {},
1786 };
1787 MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
1788 #endif
1789
1790 #ifdef CONFIG_OF
1791 static const struct of_device_id bq2415x_of_match_table[] = {
1792         { .compatible = "ti,bq24150" },
1793         { .compatible = "ti,bq24150a" },
1794         { .compatible = "ti,bq24151" },
1795         { .compatible = "ti,bq24151a" },
1796         { .compatible = "ti,bq24152" },
1797         { .compatible = "ti,bq24153" },
1798         { .compatible = "ti,bq24153a" },
1799         { .compatible = "ti,bq24155" },
1800         { .compatible = "ti,bq24156" },
1801         { .compatible = "ti,bq24156a" },
1802         { .compatible = "ti,bq24157s" },
1803         { .compatible = "ti,bq24158" },
1804         {},
1805 };
1806 MODULE_DEVICE_TABLE(of, bq2415x_of_match_table);
1807 #endif
1808
1809 static struct i2c_driver bq2415x_driver = {
1810         .driver = {
1811                 .name = "bq2415x-charger",
1812                 .of_match_table = of_match_ptr(bq2415x_of_match_table),
1813                 .acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
1814         },
1815         .probe = bq2415x_probe,
1816         .remove = bq2415x_remove,
1817         .id_table = bq2415x_i2c_id_table,
1818 };
1819 module_i2c_driver(bq2415x_driver);
1820
1821 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1822 MODULE_DESCRIPTION("bq2415x charger driver");
1823 MODULE_LICENSE("GPL");