vcs.maemo.org Git - kernel-power/blob - kernel-power-2.6.28/debian/patches/bq24150-charger.patch

   1 --- /dev/null   2012-04-29 08:55:34.366920721 +0200
   2 +++ kernel-power/drivers/power/bq2415x_charger.c        2012-04-29 17:53:57.799826239 +0200
   3 @@ -0,0 +1,1564 @@
   4 +/*
   5 +    bq2415x_charger.c - bq2415x charger driver
   6 +    Copyright (C) 2011-2012  Pali Rohár <pali.rohar@gmail.com>
   7 +
   8 +    This program is free software; you can redistribute it and/or modify
   9 +    it under the terms of the GNU General Public License as published by
  10 +    the Free Software Foundation; either version 2 of the License, or
  11 +    (at your option) any later version.
  12 +
  13 +    This program is distributed in the hope that it will be useful,
  14 +    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 +    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 +    GNU General Public License for more details.
  17 +
  18 +    You should have received a copy of the GNU General Public License along
  19 +    with this program; if not, write to the Free Software Foundation, Inc.,
  20 +    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21 +*/
  22 +
  23 +/*
  24 +  Datasheets:
  25 +  http://www.ti.com/product/bq24150
  26 +  http://www.ti.com/product/bq24150a
  27 +  http://www.ti.com/product/bq24152
  28 +  http://www.ti.com/product/bq24153
  29 +  http://www.ti.com/product/bq24153a
  30 +  http://www.ti.com/product/bq24155
  31 +*/
  32 +
  33 +#include <linux/version.h>
  34 +#include <linux/module.h>
  35 +#include <linux/param.h>
  36 +#include <linux/err.h>
  37 +#include <linux/workqueue.h>
  38 +#include <linux/sysfs.h>
  39 +#include <linux/platform_device.h>
  40 +#include <linux/power_supply.h>
  41 +#include <linux/idr.h>
  42 +#include <linux/i2c.h>
  43 +#include <linux/slab.h>
  44 +
  45 +#include <linux/power/bq2415x_charger.h>
  46 +
  47 +#define BQ2415X_TIMER_TIMEOUT  10
  48 +
  49 +#define BQ2415X_REG_STATUS             0x00
  50 +#define BQ2415X_REG_CONTROL            0x01
  51 +#define BQ2415X_REG_VOLTAGE            0x02
  52 +#define BQ2415X_REG_VENDER             0x03
  53 +#define BQ2415X_REG_CURRENT            0x04
  54 +
  55 +/* reset state for all registers */
  56 +#define BQ2415X_RESET_STATUS           BIT(6)
  57 +#define BQ2415X_RESET_CONTROL          (BIT(4)|BIT(5))
  58 +#define BQ2415X_RESET_VOLTAGE          (BIT(1)|BIT(3))
  59 +#define BQ2415X_RESET_CURRENT          (BIT(0)|BIT(3)|BIT(7))
  60 +
  61 +/* status register */
  62 +#define BQ2415X_BIT_TMR_RST            7
  63 +#define BQ2415X_BIT_OTG                        7
  64 +#define BQ2415X_BIT_EN_STAT            6
  65 +#define BQ2415X_MASK_STAT              (BIT(4)|BIT(5))
  66 +#define BQ2415X_SHIFT_STAT             4
  67 +#define BQ2415X_BIT_BOOST              3
  68 +#define BQ2415X_MASK_FAULT             (BIT(0)|BIT(1)|BIT(2))
  69 +#define BQ2415X_SHIFT_FAULT            0
  70 +
  71 +/* control register */
  72 +#define BQ2415X_MASK_LIMIT             (BIT(6)|BIT(7))
  73 +#define BQ2415X_SHIFT_LIMIT            6
  74 +#define BQ2415X_MASK_VLOWV             (BIT(4)|BIT(5))
  75 +#define BQ2415X_SHIFT_VLOWV            4
  76 +#define BQ2415X_BIT_TE                 3
  77 +#define BQ2415X_BIT_CE                 2
  78 +#define BQ2415X_BIT_HZ_MODE            1
  79 +#define BQ2415X_BIT_OPA_MODE           0
  80 +
  81 +/* voltage register */
  82 +#define BQ2415X_MASK_VO                (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
  83 +#define BQ2415X_SHIFT_VO               2
  84 +#define BQ2415X_BIT_OTG_PL             1
  85 +#define BQ2415X_BIT_OTG_EN             0
  86 +
  87 +/* vender register */
  88 +#define BQ2415X_MASK_VENDER            (BIT(5)|BIT(6)|BIT(7))
  89 +#define BQ2415X_SHIFT_VENDER           5
  90 +#define BQ2415X_MASK_PN                        (BIT(3)|BIT(4))
  91 +#define BQ2415X_SHIFT_PN               3
  92 +#define BQ2415X_MASK_REVISION          (BIT(0)|BIT(1)|BIT(2))
  93 +#define BQ2415X_SHIFT_REVISION         0
  94 +
  95 +/* current register */
  96 +/* RESET                               BIT(7) */
  97 +#define BQ2415X_MASK_VI_CHRG           (BIT(4)|BIT(5)|BIT(6)|BIT(7))
  98 +#define BQ2415X_SHIFT_VI_CHRG          4
  99 +/* N/A                                 BIT(3) */
 100 +#define BQ2415X_MASK_VI_TERM           (BIT(0)|BIT(1)|BIT(2)|BIT(7))
 101 +#define BQ2415X_SHIFT_VI_TERM          0
 102 +
 103 +
 104 +enum bq2415x_command {
 105 +       BQ2415X_TIMER_RESET,
 106 +       BQ2415X_OTG_STATUS,
 107 +       BQ2415X_STAT_PIN_STATUS,
 108 +       BQ2415X_STAT_PIN_ENABLE,
 109 +       BQ2415X_STAT_PIN_DISABLE,
 110 +       BQ2415X_CHARGE_STATUS,
 111 +       BQ2415X_BOOST_STATUS,
 112 +       BQ2415X_FAULT_STATUS,
 113 +
 114 +       BQ2415X_CHARGE_TERMINATION_STATUS,
 115 +       BQ2415X_CHARGE_TERMINATION_ENABLE,
 116 +       BQ2415X_CHARGE_TERMINATION_DISABLE,
 117 +       BQ2415X_CHARGER_STATUS,
 118 +       BQ2415X_CHARGER_ENABLE,
 119 +       BQ2415X_CHARGER_DISABLE,
 120 +       BQ2415X_HIGH_IMPEDANCE_STATUS,
 121 +       BQ2415X_HIGH_IMPEDANCE_ENABLE,
 122 +       BQ2415X_HIGH_IMPEDANCE_DISABLE,
 123 +       BQ2415X_BOOST_MODE_STATUS,
 124 +       BQ2415X_BOOST_MODE_ENABLE,
 125 +       BQ2415X_BOOST_MODE_DISABLE,
 126 +
 127 +       BQ2415X_OTG_LEVEL,
 128 +       BQ2415X_OTG_ACTIVATE_HIGH,
 129 +       BQ2415X_OTG_ACTIVATE_LOW,
 130 +       BQ2415X_OTG_PIN_STATUS,
 131 +       BQ2415X_OTG_PIN_ENABLE,
 132 +       BQ2415X_OTG_PIN_DISABLE,
 133 +
 134 +       BQ2415X_VENDER_CODE,
 135 +       BQ2415X_PART_NUMBER,
 136 +       BQ2415X_REVISION,
 137 +};
 138 +
 139 +enum bq2415x_chip {
 140 +       BQUNKNOWN,
 141 +       BQ24150,
 142 +       BQ24150A,
 143 +       BQ24151,
 144 +       BQ24151A,
 145 +       BQ24152,
 146 +       BQ24153,
 147 +       BQ24153A,
 148 +       BQ24155,
 149 +       BQ24156,
 150 +       BQ24156A,
 151 +       BQ24158,
 152 +};
 153 +
 154 +enum bq2415x_mode {
 155 +       BQ2415X_MODE_NONE,
 156 +       BQ2415X_MODE_HOST_CHARGER,
 157 +       BQ2415X_MODE_DEDICATED_CHARGER,
 158 +       BQ2415X_MODE_BOOST,
 159 +};
 160 +
 161 +static char *bq2415x_chip_name[] = {
 162 +       "unknown",
 163 +       "bq24150",
 164 +       "bq24150a",
 165 +       "bq24151",
 166 +       "bq24151a",
 167 +       "bq24152",
 168 +       "bq24153",
 169 +       "bq24153a",
 170 +       "bq24155",
 171 +       "bq24156",
 172 +       "bq24156a",
 173 +       "bq24158",
 174 +};
 175 +
 176 +struct bq2415x_device {
 177 +       struct device *dev;
 178 +       struct bq2415x_platform_data init_data;
 179 +       struct power_supply charger;
 180 +       struct delayed_work work;
 181 +       enum bq2415x_mode charger_mode; /* mode reported by hook function */
 182 +       enum bq2415x_mode mode;         /* actual setted mode */
 183 +       enum bq2415x_chip chip;
 184 +       char *model;
 185 +       char *name;
 186 +       int autotimer;  /* 1 - if driver automatically reset timer, 0 - not */
 187 +       int automode;   /* 1 - enabled, 0 - disabled; -1 - not supported */
 188 +       int id;
 189 +};
 190 +
 191 +static DEFINE_IDR(bq2415x_id);
 192 +
 193 +static DEFINE_MUTEX(bq2415x_id_mutex);
 194 +static DEFINE_MUTEX(bq2415x_timer_mutex);
 195 +static DEFINE_MUTEX(bq2415x_i2c_mutex);
 196 +
 197 +/* i2c read functions */
 198 +
 199 +static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
 200 +{
 201 +       struct i2c_client *client = to_i2c_client(bq->dev);
 202 +       struct i2c_msg msg[2];
 203 +       u8 val;
 204 +       int ret;
 205 +
 206 +       if (!client->adapter)
 207 +               return -ENODEV;
 208 +
 209 +       msg[0].addr = client->addr;
 210 +       msg[0].flags = 0;
 211 +       msg[0].buf = &reg;
 212 +       msg[0].len = sizeof(reg);
 213 +       msg[1].addr = client->addr;
 214 +       msg[1].flags = I2C_M_RD;
 215 +       msg[1].buf = &val;
 216 +       msg[1].len = sizeof(val);
 217 +
 218 +       mutex_lock(&bq2415x_i2c_mutex);
 219 +       ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
 220 +       mutex_unlock(&bq2415x_i2c_mutex);
 221 +
 222 +       if (ret < 0)
 223 +               return ret;
 224 +
 225 +       return val;
 226 +}
 227 +
 228 +static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
 229 +                               u8 mask, u8 shift)
 230 +{
 231 +       int ret;
 232 +
 233 +       if (shift > 8)
 234 +               return -EINVAL;
 235 +
 236 +       ret = bq2415x_i2c_read(bq, reg);
 237 +       if (ret < 0)
 238 +               return ret;
 239 +       else
 240 +               return (ret & mask) >> shift;
 241 +}
 242 +
 243 +static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
 244 +{
 245 +       if (bit > 8)
 246 +               return -EINVAL;
 247 +       else
 248 +               return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
 249 +}
 250 +
 251 +/* i2c write functions */
 252 +
 253 +static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
 254 +{
 255 +       struct i2c_client *client = to_i2c_client(bq->dev);
 256 +       struct i2c_msg msg[1];
 257 +       u8 data[2];
 258 +       int ret;
 259 +
 260 +       data[0] = reg;
 261 +       data[1] = val;
 262 +
 263 +       msg[0].addr = client->addr;
 264 +       msg[0].flags = 0;
 265 +       msg[0].buf = data;
 266 +       msg[0].len = ARRAY_SIZE(data);
 267 +
 268 +       mutex_lock(&bq2415x_i2c_mutex);
 269 +       ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
 270 +       mutex_unlock(&bq2415x_i2c_mutex);
 271 +
 272 +       /* i2c_transfer returns number of messages transferred */
 273 +       if (ret < 0)
 274 +               return ret;
 275 +       else if (ret != 1)
 276 +               return -EIO;
 277 +
 278 +       return 0;
 279 +}
 280 +
 281 +static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
 282 +                               u8 mask, u8 shift)
 283 +{
 284 +       int ret;
 285 +
 286 +       if (shift > 8)
 287 +               return -EINVAL;
 288 +
 289 +       ret = bq2415x_i2c_read(bq, reg);
 290 +       if (ret < 0)
 291 +               return ret;
 292 +
 293 +       ret &= ~mask;
 294 +       ret |= val << shift;
 295 +
 296 +       return bq2415x_i2c_write(bq, reg, ret);
 297 +}
 298 +
 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 +       else
 305 +               return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
 306 +}
 307 +
 308 +/* global exec command function */
 309 +
 310 +static int bq2415x_exec_command(struct bq2415x_device *bq,
 311 +                               enum bq2415x_command command)
 312 +{
 313 +       int ret;
 314 +       switch (command) {
 315 +       case BQ2415X_TIMER_RESET:
 316 +               return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
 317 +                               1, BQ2415X_BIT_TMR_RST);
 318 +       case BQ2415X_OTG_STATUS:
 319 +               return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
 320 +                               BQ2415X_BIT_OTG);
 321 +       case BQ2415X_STAT_PIN_STATUS:
 322 +               return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
 323 +                               BQ2415X_BIT_EN_STAT);
 324 +       case BQ2415X_STAT_PIN_ENABLE:
 325 +               return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
 326 +                               BQ2415X_BIT_EN_STAT);
 327 +       case BQ2415X_STAT_PIN_DISABLE:
 328 +               return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
 329 +                               BQ2415X_BIT_EN_STAT);
 330 +       case BQ2415X_CHARGE_STATUS:
 331 +               return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
 332 +                               BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
 333 +       case BQ2415X_BOOST_STATUS:
 334 +               return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
 335 +                               BQ2415X_BIT_BOOST);
 336 +       case BQ2415X_FAULT_STATUS:
 337 +               return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
 338 +                       BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
 339 +
 340 +       case BQ2415X_CHARGE_TERMINATION_STATUS:
 341 +               return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
 342 +                               BQ2415X_BIT_TE);
 343 +       case BQ2415X_CHARGE_TERMINATION_ENABLE:
 344 +               return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 345 +                               1, BQ2415X_BIT_TE);
 346 +       case BQ2415X_CHARGE_TERMINATION_DISABLE:
 347 +               return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
 348 +                               0, BQ2415X_BIT_TE);
 349 +       case BQ2415X_CHARGER_STATUS:
 350 +               ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
 351 +                       BQ2415X_BIT_CE);
 352 +               if (ret < 0)
 353 +                       return ret;
 354 +               else
 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 +       default:
 411 +               return -EINVAL;
 412 +       }
 413 +}
 414 +
 415 +/* global detect chip */
 416 +
 417 +static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
 418 +{
 419 +       struct i2c_client *client = to_i2c_client(bq->dev);
 420 +       int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
 421 +
 422 +       if (ret < 0)
 423 +               return ret;
 424 +
 425 +       switch (client->addr) {
 426 +       case 0x6b:
 427 +               switch (ret) {
 428 +               case 0:
 429 +                       if (bq->chip == BQ24151A)
 430 +                               return bq->chip;
 431 +                       else
 432 +                               return BQ24151;
 433 +               case 1:
 434 +                       if (bq->chip == BQ24150A ||
 435 +                               bq->chip == BQ24152 ||
 436 +                               bq->chip == BQ24155)
 437 +                               return bq->chip;
 438 +                       else
 439 +                               return BQ24150;
 440 +               case 2:
 441 +                       if (bq->chip == BQ24153A)
 442 +                               return bq->chip;
 443 +                       else
 444 +                               return BQ24153;
 445 +               default:
 446 +                       return BQUNKNOWN;
 447 +               }
 448 +               break;
 449 +
 450 +       case 0x6a:
 451 +               switch (ret) {
 452 +               case 0:
 453 +                       if (bq->chip == BQ24156A)
 454 +                               return bq->chip;
 455 +                       else
 456 +                               return BQ24156;
 457 +               case 2:
 458 +                       return BQ24158;
 459 +               default:
 460 +                       return BQUNKNOWN;
 461 +               }
 462 +               break;
 463 +       }
 464 +
 465 +       return BQUNKNOWN;
 466 +}
 467 +
 468 +static int bq2415x_detect_revision(struct bq2415x_device *bq)
 469 +{
 470 +       int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
 471 +       int chip = bq2415x_detect_chip(bq);
 472 +       if (ret < 0 || chip < 0)
 473 +               return -1;
 474 +
 475 +       switch (chip) {
 476 +       case BQ24150:
 477 +       case BQ24150A:
 478 +       case BQ24151:
 479 +       case BQ24151A:
 480 +       case BQ24152:
 481 +               if (ret >= 0 && ret <= 3)
 482 +                       return ret;
 483 +               else
 484 +                       return -1;
 485 +
 486 +       case BQ24153:
 487 +       case BQ24153A:
 488 +       case BQ24156:
 489 +       case BQ24156A:
 490 +       case BQ24158:
 491 +               if (ret == 3)
 492 +                       return 0;
 493 +               else if (ret == 1)
 494 +                       return 1;
 495 +               else
 496 +                       return -1;
 497 +
 498 +       case BQ24155:
 499 +               if (ret == 3)
 500 +                       return 3;
 501 +               else
 502 +                       return -1;
 503 +
 504 +       case BQUNKNOWN:
 505 +               return -1;
 506 +       }
 507 +
 508 +       return -1;
 509 +}
 510 +
 511 +static int bq2415x_get_vender_code(struct bq2415x_device *bq)
 512 +{
 513 +       int ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
 514 +       if (ret < 0)
 515 +               return 0;
 516 +       else /* convert to binary */
 517 +               return (ret & 0x1) +
 518 +                       ((ret >> 1) & 0x1) * 10 +
 519 +                       ((ret >> 2) & 0x1) * 100;
 520 +}
 521 +
 522 +/* global other functions */
 523 +
 524 +static void bq2415x_reset_chip(struct bq2415x_device *bq)
 525 +{
 526 +       bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
 527 +       bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
 528 +       bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
 529 +       bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
 530 +}
 531 +
 532 +static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
 533 +{
 534 +       int val;
 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 +       return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
 544 +                       BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
 545 +}
 546 +
 547 +static int bq2415x_get_current_limit(struct bq2415x_device *bq)
 548 +{
 549 +       int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
 550 +                       BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
 551 +       if (ret < 0)
 552 +               return ret;
 553 +       else if (ret == 0)
 554 +               return 100;
 555 +       else if (ret == 1)
 556 +               return 500;
 557 +       else if (ret == 2)
 558 +               return 800;
 559 +       else if (ret == 3)
 560 +               return 1800;
 561 +       else
 562 +               return -EINVAL;
 563 +}
 564 +
 565 +static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
 566 +{
 567 +       int val = mV/100 + (mV%100 > 0 ? 1 : 0) - 34;
 568 +
 569 +       if (val < 0)
 570 +               val = 0;
 571 +       else if (val > 3)
 572 +               val = 3;
 573 +
 574 +       return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
 575 +                       BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
 576 +}
 577 +
 578 +static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
 579 +{
 580 +       int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
 581 +                       BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
 582 +       if (ret < 0)
 583 +               return ret;
 584 +       else
 585 +               return 100 * (34 + ret);
 586 +}
 587 +
 588 +static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
 589 +                                               int mV)
 590 +{
 591 +       int val = (mV/10 + (mV%10 > 0 ? 1 : 0) - 350) / 2;
 592 +
 593 +       if (val < 0)
 594 +               val = 0;
 595 +       else if (val > 94) /* FIXME: Max is 94 or 122 ? */
 596 +               return -EINVAL;
 597 +
 598 +       return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
 599 +                       BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
 600 +}
 601 +
 602 +static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
 603 +{
 604 +       int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
 605 +                       BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
 606 +       if (ret < 0)
 607 +               return ret;
 608 +       else
 609 +               return 10 * (350 + 2*ret);
 610 +}
 611 +
 612 +static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
 613 +{
 614 +       int val;
 615 +       if (bq->init_data.resistor_sense <= 0)
 616 +               return -ENOSYS;
 617 +
 618 +       val = (mA * bq->init_data.resistor_sense - 37400);
 619 +       val = val/6800 + (val%6800 > 0 ? 1 : 0);
 620 +
 621 +       if (val < 0)
 622 +               val = 0;
 623 +       else if (val > 7)
 624 +               val = 7;
 625 +
 626 +       return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
 627 +                       BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
 628 +}
 629 +
 630 +static int bq2415x_get_charge_current(struct bq2415x_device *bq)
 631 +{
 632 +       int ret;
 633 +       if (bq->init_data.resistor_sense <= 0)
 634 +               return -ENOSYS;
 635 +
 636 +       ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
 637 +                       BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
 638 +       if (ret < 0)
 639 +               return ret;
 640 +       else
 641 +               return (37400 + 6800*ret) / bq->init_data.resistor_sense;
 642 +}
 643 +
 644 +static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
 645 +{
 646 +       int val;
 647 +       if (bq->init_data.resistor_sense <= 0)
 648 +               return -ENOSYS;
 649 +
 650 +       val = (mA * bq->init_data.resistor_sense - 3400);
 651 +       val = val/3400 + (val%3400 > 0 ? 1 : 0);
 652 +
 653 +       if (val < 0)
 654 +               val = 0;
 655 +       else if (val > 7)
 656 +               val = 7;
 657 +
 658 +       return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
 659 +                       BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
 660 +}
 661 +
 662 +static int bq2415x_get_termination_current(struct bq2415x_device *bq)
 663 +{
 664 +       int ret;
 665 +       if (bq->init_data.resistor_sense <= 0)
 666 +               return -ENOSYS;
 667 +
 668 +       ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
 669 +                       BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
 670 +       if (ret < 0)
 671 +               return ret;
 672 +       else
 673 +               return (3400 + 3400*ret) / bq->init_data.resistor_sense;
 674 +}
 675 +
 676 +#define bq2415x_set_default_value(bq, value) \
 677 +       do { \
 678 +               int ret = 0; \
 679 +               if (bq->init_data.value != -1) \
 680 +                       ret = bq2415x_set_##value(bq, bq->init_data.value); \
 681 +               if (ret < 0) \
 682 +                       return ret; \
 683 +       } while (0)
 684 +
 685 +static int bq2415x_set_defaults(struct bq2415x_device *bq)
 686 +{
 687 +       bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
 688 +       bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
 689 +       bq2415x_set_default_value(bq, current_limit);
 690 +       bq2415x_set_default_value(bq, weak_battery_voltage);
 691 +       bq2415x_set_default_value(bq, battery_regulation_voltage);
 692 +       if (bq->init_data.resistor_sense > 0) {
 693 +               bq2415x_set_default_value(bq, charge_current);
 694 +               bq2415x_set_default_value(bq, termination_current);
 695 +               bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
 696 +       }
 697 +       bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
 698 +       return 0;
 699 +}
 700 +
 701 +#undef bq2415x_set_default_value
 702 +
 703 +/* charger mode functions */
 704 +
 705 +static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
 706 +{
 707 +       int ret = 0;
 708 +       int charger = 0;
 709 +
 710 +       if (mode == BQ2415X_MODE_NONE ||
 711 +               mode == BQ2415X_MODE_HOST_CHARGER ||
 712 +               mode == BQ2415X_MODE_DEDICATED_CHARGER)
 713 +                       charger = 1;
 714 +
 715 +       if (charger)
 716 +               ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
 717 +       else
 718 +               ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
 719 +
 720 +       if (ret < 0)
 721 +               return ret;
 722 +
 723 +       switch (mode) {
 724 +       case BQ2415X_MODE_NONE:
 725 +               dev_info(bq->dev, "mode: N/A\n");
 726 +               ret = bq2415x_set_current_limit(bq, 100);
 727 +               break;
 728 +       case BQ2415X_MODE_HOST_CHARGER:
 729 +               dev_info(bq->dev, "mode: Host/HUB charger\n");
 730 +               ret = bq2415x_set_current_limit(bq, 500);
 731 +               break;
 732 +       case BQ2415X_MODE_DEDICATED_CHARGER:
 733 +               dev_info(bq->dev, "mode: Dedicated charger\n");
 734 +               ret = bq2415x_set_current_limit(bq, 1800);
 735 +               break;
 736 +       case BQ2415X_MODE_BOOST: /* Boost mode */
 737 +               dev_info(bq->dev, "mode: Boost\n");
 738 +               ret = bq2415x_set_current_limit(bq, 100);
 739 +               break;
 740 +       }
 741 +
 742 +       if (ret < 0)
 743 +               return ret;
 744 +
 745 +       if (charger)
 746 +               ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
 747 +       else
 748 +               ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
 749 +
 750 +       if (ret < 0)
 751 +               return ret;
 752 +
 753 +       bq->mode = mode;
 754 +       return 0;
 755 +
 756 +}
 757 +
 758 +static void bq2415x_set_charger_type(int type, void *data)
 759 +{
 760 +       struct bq2415x_device *bq = data;
 761 +
 762 +       if (!bq)
 763 +               return;
 764 +
 765 +       switch (type) {
 766 +       case 0:
 767 +               bq->charger_mode = BQ2415X_MODE_NONE;
 768 +               break;
 769 +       case 1:
 770 +               bq->charger_mode = BQ2415X_MODE_HOST_CHARGER;
 771 +               break;
 772 +       case 2:
 773 +               bq->charger_mode = BQ2415X_MODE_DEDICATED_CHARGER;
 774 +               break;
 775 +       default:
 776 +               return;
 777 +       }
 778 +
 779 +       if (bq->automode < 1)
 780 +               return;
 781 +
 782 +       /* TODO: Detect USB Host mode */
 783 +
 784 +       bq2415x_set_mode(bq, bq->charger_mode);
 785 +
 786 +}
 787 +
 788 +/* timer functions */
 789 +
 790 +static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
 791 +{
 792 +       mutex_lock(&bq2415x_timer_mutex);
 793 +
 794 +       if (bq->autotimer == state) {
 795 +               mutex_unlock(&bq2415x_timer_mutex);
 796 +               return;
 797 +       }
 798 +
 799 +       bq->autotimer = state;
 800 +
 801 +       if (state) {
 802 +               schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
 803 +               bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
 804 +       } else {
 805 +               cancel_delayed_work_sync(&bq->work);
 806 +       }
 807 +
 808 +       mutex_unlock(&bq2415x_timer_mutex);
 809 +}
 810 +
 811 +static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
 812 +{
 813 +       dev_err(bq->dev, "%s\n", msg);
 814 +       if (bq->automode > 0)
 815 +               bq->automode = 0;
 816 +       bq2415x_set_mode(bq, BQ2415X_MODE_NONE);
 817 +       bq2415x_set_autotimer(bq, 0);
 818 +}
 819 +
 820 +static void bq2415x_timer_work(struct work_struct *work)
 821 +{
 822 +       struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
 823 +                                               work.work);
 824 +       int ret, error, boost;
 825 +
 826 +       if (!bq->autotimer)
 827 +               return;
 828 +
 829 +       ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
 830 +       if (ret < 0) {
 831 +               bq2415x_timer_error(bq, "Reseting timer failed");
 832 +               return;
 833 +       }
 834 +
 835 +       boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
 836 +       if (boost < 0) {
 837 +               bq2415x_timer_error(bq, "Unknow error");
 838 +               return;
 839 +       }
 840 +
 841 +       error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
 842 +       if (error < 0) {
 843 +               bq2415x_timer_error(bq, "Unknow error");
 844 +               return;
 845 +       }
 846 +
 847 +       if (boost) {
 848 +               switch (error) {
 849 +               case 0: /* No error */
 850 +                       break;
 851 +               case 6: /* Timer expired */
 852 +                       dev_err(bq->dev, "Timer expired\n");
 853 +                       break;
 854 +               case 3: /* Battery voltage too low */
 855 +                       dev_err(bq->dev, "Battery voltage to low\n");
 856 +                       break;
 857 +
 858 +               case 1: /* Overvoltage protection (chip fried) */
 859 +                       bq2415x_timer_error(bq,
 860 +                               "Overvolatge protection (chip fried)");
 861 +                       return;
 862 +               case 2: /* Overload */
 863 +                       bq2415x_timer_error(bq, "Overload");
 864 +                       return;
 865 +               case 4: /* Battery overvoltage protection */
 866 +                       bq2415x_timer_error(bq,
 867 +                               "Battery overvoltage protection");
 868 +                       return;
 869 +               case 5: /* Thermal shutdown (too hot) */
 870 +                       bq2415x_timer_error(bq,
 871 +                                       "Thermal shutdown (too hot)");
 872 +                       return;
 873 +               case 7: /* N/A */
 874 +                       bq2415x_timer_error(bq, "Unknown error");
 875 +                       return;
 876 +               }
 877 +       } else {
 878 +               switch (error) {
 879 +               case 0: /* No error */
 880 +                       break;
 881 +               case 2: /* Sleep mode */
 882 +                       dev_err(bq->dev, "Sleep mode\n");
 883 +                       break;
 884 +               case 3: /* Poor input source */
 885 +                       dev_err(bq->dev, "Poor input source\n");
 886 +                       break;
 887 +               case 6: /* Timer expired */
 888 +                       dev_err(bq->dev, "Timer expired\n");
 889 +                       break;
 890 +               case 7: /* No battery */
 891 +                       dev_err(bq->dev, "No battery\n");
 892 +                       break;
 893 +
 894 +               case 1: /* Overvoltage protection (chip fried) */
 895 +                       bq2415x_timer_error(bq,
 896 +                               "Overvolatge protection (chip fried)");
 897 +                       return;
 898 +               case 4: /* Battery overvoltage protection */
 899 +                       bq2415x_timer_error(bq,
 900 +                               "Battery overvoltage protection");
 901 +                       return;
 902 +               case 5: /* Thermal shutdown (too hot) */
 903 +                       bq2415x_timer_error(bq,
 904 +                               "Thermal shutdown (too hot)");
 905 +                       return;
 906 +               }
 907 +       }
 908 +
 909 +       schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
 910 +}
 911 +
 912 +/* power supply */
 913 +
 914 +static enum power_supply_property bq2415x_power_supply_props[] = {
 915 +       /* TODO: more power supply properties */
 916 +       POWER_SUPPLY_PROP_STATUS,
 917 +       POWER_SUPPLY_PROP_MODEL_NAME,
 918 +};
 919 +
 920 +static int bq2415x_power_supply_get_property(struct power_supply *psy,
 921 +       enum power_supply_property psp, union power_supply_propval *val)
 922 +{
 923 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
 924 +                                               charger);
 925 +       int ret;
 926 +
 927 +       switch (psp) {
 928 +       case POWER_SUPPLY_PROP_STATUS:
 929 +               ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
 930 +               if (ret < 0)
 931 +                       return ret;
 932 +               else if (ret == 0) /* Ready */
 933 +                       val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 934 +               else if (ret == 1) /* Charge in progress */
 935 +                       val->intval = POWER_SUPPLY_STATUS_CHARGING;
 936 +               else if (ret == 2) /* Charge done */
 937 +                       val->intval = POWER_SUPPLY_STATUS_FULL;
 938 +               else
 939 +                       val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 940 +               break;
 941 +       case POWER_SUPPLY_PROP_MODEL_NAME:
 942 +               val->strval = bq->model;
 943 +               break;
 944 +       default:
 945 +               return -EINVAL;
 946 +       }
 947 +       return 0;
 948 +}
 949 +
 950 +static int bq2415x_power_supply_init(struct bq2415x_device *bq)
 951 +{
 952 +       int ret;
 953 +       int chip;
 954 +       char revstr[8];
 955 +
 956 +       bq->charger.name = bq->name;
 957 +       bq->charger.type = POWER_SUPPLY_TYPE_USB;
 958 +       bq->charger.properties = bq2415x_power_supply_props;
 959 +       bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props);
 960 +       bq->charger.get_property = bq2415x_power_supply_get_property;
 961 +
 962 +       ret = bq2415x_detect_chip(bq);
 963 +       if (ret < 0)
 964 +               chip = BQUNKNOWN;
 965 +       else
 966 +               chip = ret;
 967 +
 968 +       ret = bq2415x_detect_revision(bq);
 969 +       if (ret < 0)
 970 +               strcpy(revstr, "unknown");
 971 +       else
 972 +               sprintf(revstr, "1.%d", ret);
 973 +
 974 +       bq->model = kasprintf(GFP_KERNEL,
 975 +                               "chip %s, revision %s, vender code %.3d",
 976 +                               bq2415x_chip_name[chip], revstr,
 977 +                               bq2415x_get_vender_code(bq));
 978 +       if (!bq->model) {
 979 +               dev_err(bq->dev, "failed to allocate model name\n");
 980 +               return -ENOMEM;
 981 +       }
 982 +
 983 +       ret = power_supply_register(bq->dev, &bq->charger);
 984 +       if (ret) {
 985 +               kfree(bq->model);
 986 +               return ret;
 987 +       }
 988 +
 989 +       return 0;
 990 +}
 991 +
 992 +static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
 993 +{
 994 +       bq->autotimer = 0;
 995 +       if (bq->automode > 0)
 996 +               bq->automode = 0;
 997 +       cancel_delayed_work_sync(&bq->work);
 998 +       power_supply_unregister(&bq->charger);
 999 +       kfree(bq->model);
1000 +}
1001 +
1002 +/* sysfs files */
1003 +
1004 +static ssize_t bq2415x_sysfs_show_status(struct device *dev,
1005 +               struct device_attribute *attr, char *buf)
1006 +{
1007 +       struct power_supply *psy = dev_get_drvdata(dev);
1008 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1009 +                                               charger);
1010 +       enum bq2415x_command command;
1011 +       int ret;
1012 +
1013 +       if (strcmp(attr->attr.name, "otg_status") == 0)
1014 +               command = BQ2415X_OTG_STATUS;
1015 +       else if (strcmp(attr->attr.name, "charge_status") == 0)
1016 +               command = BQ2415X_CHARGE_STATUS;
1017 +       else if (strcmp(attr->attr.name, "boost_status") == 0)
1018 +               command = BQ2415X_BOOST_STATUS;
1019 +       else if (strcmp(attr->attr.name, "fault_status") == 0)
1020 +               command = BQ2415X_FAULT_STATUS;
1021 +       else
1022 +               return -EINVAL;
1023 +
1024 +       ret = bq2415x_exec_command(bq, command);
1025 +       if (ret < 0)
1026 +               return ret;
1027 +       else
1028 +               return sprintf(buf, "%d\n", ret);
1029 +}
1030 +
1031 +static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1032 +               struct device_attribute *attr, const char *buf, size_t count)
1033 +{
1034 +       struct power_supply *psy = dev_get_drvdata(dev);
1035 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1036 +                                               charger);
1037 +       int ret = 0;
1038 +
1039 +       if (strncmp(buf, "auto", 4) == 0)
1040 +               bq2415x_set_autotimer(bq, 1);
1041 +       else if (strncmp(buf, "off", 3) == 0)
1042 +               bq2415x_set_autotimer(bq, 0);
1043 +       else
1044 +               ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1045 +
1046 +       if (ret < 0)
1047 +               return ret;
1048 +       else
1049 +               return count;
1050 +}
1051 +
1052 +static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1053 +               struct device_attribute *attr, char *buf)
1054 +{
1055 +       struct power_supply *psy = dev_get_drvdata(dev);
1056 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1057 +                                               charger);
1058 +
1059 +       if (bq->autotimer)
1060 +               return sprintf(buf, "auto\n");
1061 +       else
1062 +               return sprintf(buf, "off\n");
1063 +}
1064 +
1065 +static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1066 +               struct device_attribute *attr, const char *buf, size_t count)
1067 +{
1068 +       struct power_supply *psy = dev_get_drvdata(dev);
1069 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1070 +                                               charger);
1071 +       enum bq2415x_mode mode;
1072 +       int ret = 0;
1073 +
1074 +       if (strncmp(buf, "auto", 4) == 0) {
1075 +               if (bq->automode < 0)
1076 +                       return -ENOSYS;
1077 +               bq->automode = 1;
1078 +               mode = bq->charger_mode;
1079 +       } else if (strncmp(buf, "none", 4) == 0) {
1080 +               if (bq->automode > 0)
1081 +                       bq->automode = 0;
1082 +               mode = BQ2415X_MODE_NONE;
1083 +       } else if (strncmp(buf, "host", 4) == 0) {
1084 +               if (bq->automode > 0)
1085 +                       bq->automode = 0;
1086 +               mode = BQ2415X_MODE_HOST_CHARGER;
1087 +       } else if (strncmp(buf, "dedicated", 9) == 0) {
1088 +               if (bq->automode > 0)
1089 +                       bq->automode = 0;
1090 +               mode = BQ2415X_MODE_DEDICATED_CHARGER;
1091 +       } else if (strncmp(buf, "boost", 5) == 0) {
1092 +               if (bq->automode > 0)
1093 +                       bq->automode = 0;
1094 +               mode = BQ2415X_MODE_BOOST;
1095 +       } else if (strncmp(buf, "reset", 5) == 0) {
1096 +               bq2415x_reset_chip(bq);
1097 +               bq2415x_set_defaults(bq);
1098 +               if (bq->automode > 0)
1099 +                       bq->automode = 1;
1100 +               return count;
1101 +       } else
1102 +               return -EINVAL;
1103 +
1104 +       ret = bq2415x_set_mode(bq, mode);
1105 +       if (ret < 0)
1106 +               return ret;
1107 +       else
1108 +               return count;
1109 +}
1110 +
1111 +static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1112 +               struct device_attribute *attr, char *buf)
1113 +{
1114 +       struct power_supply *psy = dev_get_drvdata(dev);
1115 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1116 +                                               charger);
1117 +       ssize_t ret = 0;
1118 +
1119 +       if (bq->automode > 0)
1120 +               ret += sprintf(buf+ret, "auto (");
1121 +
1122 +       switch (bq->mode) {
1123 +       case BQ2415X_MODE_NONE:
1124 +               ret += sprintf(buf+ret, "none");
1125 +               break;
1126 +       case BQ2415X_MODE_HOST_CHARGER:
1127 +               ret += sprintf(buf+ret, "host");
1128 +               break;
1129 +       case BQ2415X_MODE_DEDICATED_CHARGER:
1130 +               ret += sprintf(buf+ret, "dedicated");
1131 +               break;
1132 +       case BQ2415X_MODE_BOOST:
1133 +               ret += sprintf(buf+ret, "boost");
1134 +               break;
1135 +       }
1136 +
1137 +       if (bq->automode > 0)
1138 +               ret += sprintf(buf+ret, ")");
1139 +
1140 +       ret += sprintf(buf+ret, "\n");
1141 +       return ret;
1142 +}
1143 +
1144 +static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1145 +               struct device_attribute *attr, const char *buf, size_t count)
1146 +{
1147 +       struct power_supply *psy = dev_get_drvdata(dev);
1148 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1149 +                                               charger);
1150 +       ssize_t ret = 0;
1151 +       char *end;
1152 +       int reg;
1153 +       int val;
1154 +
1155 +       reg = simple_strtol(buf, &end, 16);
1156 +       if (reg < 0 || reg > 4)
1157 +               return -EINVAL;
1158 +
1159 +       val = simple_strtol(end+1, NULL, 16);
1160 +       if (val < 0 || val > 255)
1161 +               return -EINVAL;
1162 +
1163 +       ret = bq2415x_i2c_write(bq, reg, val);
1164 +       if (ret < 0)
1165 +               return ret;
1166 +       else
1167 +               return count;
1168 +}
1169 +
1170 +static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1171 +                                       u8 reg, char *buf)
1172 +{
1173 +       int ret = bq2415x_i2c_read(bq, reg);
1174 +       if (ret < 0)
1175 +               return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1176 +       else
1177 +               return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1178 +}
1179 +
1180 +static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1181 +               struct device_attribute *attr, char *buf)
1182 +{
1183 +       struct power_supply *psy = dev_get_drvdata(dev);
1184 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1185 +                                               charger);
1186 +       ssize_t ret = 0;
1187 +
1188 +       ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1189 +       ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1190 +       ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1191 +       ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1192 +       ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1193 +       return ret;
1194 +}
1195 +
1196 +/* Current & Volatage settings */
1197 +
1198 +static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1199 +               struct device_attribute *attr, const char *buf, size_t count)
1200 +{
1201 +       struct power_supply *psy = dev_get_drvdata(dev);
1202 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1203 +                                               charger);
1204 +       long val;
1205 +       int ret;
1206 +
1207 +       if (strict_strtol(buf, 10, &val) < 0)
1208 +               return -EINVAL;
1209 +
1210 +       if (strcmp(attr->attr.name, "current_limit") == 0)
1211 +               ret = bq2415x_set_current_limit(bq, val);
1212 +       else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1213 +               ret = bq2415x_set_weak_battery_voltage(bq, val);
1214 +       else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1215 +               ret = bq2415x_set_battery_regulation_voltage(bq, val);
1216 +       else if (strcmp(attr->attr.name, "charge_current") == 0)
1217 +               ret = bq2415x_set_charge_current(bq, val);
1218 +       else if (strcmp(attr->attr.name, "termination_current") == 0)
1219 +               ret = bq2415x_set_termination_current(bq, val);
1220 +       else
1221 +               return -EINVAL;
1222 +
1223 +       if (ret < 0)
1224 +               return ret;
1225 +       else
1226 +               return count;
1227 +}
1228 +
1229 +static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1230 +               struct device_attribute *attr, char *buf)
1231 +{
1232 +       struct power_supply *psy = dev_get_drvdata(dev);
1233 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1234 +                                               charger);
1235 +       int ret;
1236 +
1237 +       if (strcmp(attr->attr.name, "current_limit") == 0)
1238 +               ret = bq2415x_get_current_limit(bq);
1239 +       else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1240 +               ret = bq2415x_get_weak_battery_voltage(bq);
1241 +       else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1242 +               ret = bq2415x_get_battery_regulation_voltage(bq);
1243 +       else if (strcmp(attr->attr.name, "charge_current") == 0)
1244 +               ret = bq2415x_get_charge_current(bq);
1245 +       else if (strcmp(attr->attr.name, "termination_current") == 0)
1246 +               ret = bq2415x_get_termination_current(bq);
1247 +       else
1248 +               return -EINVAL;
1249 +
1250 +       if (ret < 0)
1251 +               return ret;
1252 +       else
1253 +               return sprintf(buf, "%d\n", ret);
1254 +}
1255 +
1256 +static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1257 +               struct device_attribute *attr, const char *buf, size_t count)
1258 +{
1259 +       struct power_supply *psy = dev_get_drvdata(dev);
1260 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1261 +                                               charger);
1262 +       enum bq2415x_command command;
1263 +       long val;
1264 +       int ret;
1265 +
1266 +       if (strict_strtol(buf, 10, &val) < 0)
1267 +               return -EINVAL;
1268 +
1269 +       if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1270 +               command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1271 +                       BQ2415X_CHARGE_TERMINATION_DISABLE;
1272 +       else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1273 +               command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1274 +                       BQ2415X_HIGH_IMPEDANCE_DISABLE;
1275 +       else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1276 +               command = val ? BQ2415X_OTG_PIN_ENABLE :
1277 +                       BQ2415X_OTG_PIN_DISABLE;
1278 +       else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1279 +               command = val ? BQ2415X_STAT_PIN_ENABLE :
1280 +                       BQ2415X_STAT_PIN_DISABLE;
1281 +       else
1282 +               return -EINVAL;
1283 +
1284 +       ret = bq2415x_exec_command(bq, command);
1285 +       if (ret < 0)
1286 +               return ret;
1287 +       else
1288 +               return count;
1289 +}
1290 +
1291 +static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1292 +               struct device_attribute *attr, char *buf)
1293 +{
1294 +       struct power_supply *psy = dev_get_drvdata(dev);
1295 +       struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1296 +                                               charger);
1297 +       enum bq2415x_command command;
1298 +       int ret;
1299 +
1300 +       if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1301 +               command = BQ2415X_CHARGE_TERMINATION_STATUS;
1302 +       else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1303 +               command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1304 +       else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1305 +               command = BQ2415X_OTG_PIN_STATUS;
1306 +       else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1307 +               command = BQ2415X_STAT_PIN_STATUS;
1308 +       else
1309 +               return -EINVAL;
1310 +
1311 +       ret = bq2415x_exec_command(bq, command);
1312 +       if (ret < 0)
1313 +               return ret;
1314 +       else
1315 +               return sprintf(buf, "%d\n", ret);
1316 +}
1317 +
1318 +static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1319 +               bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1320 +static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1321 +               bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1322 +static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1323 +               bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1324 +static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1325 +               bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1326 +static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1327 +               bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1328 +
1329 +static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1330 +               bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1331 +static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1332 +               bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1333 +static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1334 +               bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1335 +static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1336 +               bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1337 +
1338 +static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1339 +               bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1340 +static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1341 +               bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1342 +
1343 +static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1344 +               bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1345 +
1346 +static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1347 +static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1348 +static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1349 +static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1350 +
1351 +static struct attribute *bq2415x_sysfs_attributes[] = {
1352 +       &dev_attr_current_limit.attr,
1353 +       &dev_attr_weak_battery_voltage.attr,
1354 +       &dev_attr_battery_regulation_voltage.attr,
1355 +       &dev_attr_charge_current.attr,
1356 +       &dev_attr_termination_current.attr,
1357 +
1358 +       &dev_attr_charge_termination_enable.attr,
1359 +       &dev_attr_high_impedance_enable.attr,
1360 +       &dev_attr_otg_pin_enable.attr,
1361 +       &dev_attr_stat_pin_enable.attr,
1362 +
1363 +       &dev_attr_mode.attr,
1364 +       &dev_attr_timer.attr,
1365 +
1366 +       &dev_attr_registers.attr,
1367 +
1368 +       &dev_attr_otg_status.attr,
1369 +       &dev_attr_charge_status.attr,
1370 +       &dev_attr_boost_status.attr,
1371 +       &dev_attr_fault_status.attr,
1372 +       NULL,
1373 +};
1374 +
1375 +static const struct attribute_group bq2415x_sysfs_attr_group = {
1376 +       .attrs = bq2415x_sysfs_attributes,
1377 +};
1378 +
1379 +static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1380 +{
1381 +       return sysfs_create_group(&bq->charger.dev->kobj,
1382 +                       &bq2415x_sysfs_attr_group);
1383 +}
1384 +
1385 +static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1386 +{
1387 +       sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group);
1388 +}
1389 +
1390 +/* bq2415x register */
1391 +
1392 +static int bq2415x_probe(struct i2c_client *client,
1393 +               const struct i2c_device_id *id)
1394 +{
1395 +       int ret;
1396 +       int num;
1397 +       char *name;
1398 +       struct bq2415x_device *bq;
1399 +
1400 +       if (!client->dev.platform_data) {
1401 +               dev_err(&client->dev, "platform data not set\n");
1402 +               return -ENODEV;
1403 +       }
1404 +
1405 +       /* Get new ID for the new device */
1406 +       ret = idr_pre_get(&bq2415x_id, GFP_KERNEL);
1407 +       if (ret == 0)
1408 +               return -ENOMEM;
1409 +
1410 +       mutex_lock(&bq2415x_id_mutex);
1411 +       ret = idr_get_new(&bq2415x_id, client, &num);
1412 +       mutex_unlock(&bq2415x_id_mutex);
1413 +
1414 +       if (ret < 0)
1415 +               return ret;
1416 +
1417 +       name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1418 +       if (!name) {
1419 +               dev_err(&client->dev, "failed to allocate device name\n");
1420 +               ret = -ENOMEM;
1421 +               goto error_1;
1422 +       }
1423 +
1424 +       bq = kzalloc(sizeof(*bq), GFP_KERNEL);
1425 +       if (!bq) {
1426 +               dev_err(&client->dev, "failed to allocate device data\n");
1427 +               ret = -ENOMEM;
1428 +               goto error_2;
1429 +       }
1430 +
1431 +       i2c_set_clientdata(client, bq);
1432 +
1433 +       bq->id = num;
1434 +       bq->dev = &client->dev;
1435 +       bq->chip = id->driver_data;
1436 +       bq->name = name;
1437 +       bq->mode = BQ2415X_MODE_NONE;
1438 +       bq->charger_mode = BQ2415X_MODE_NONE;
1439 +       bq->autotimer = 0;
1440 +       bq->automode = 0;
1441 +
1442 +       memcpy(&bq->init_data, client->dev.platform_data,
1443 +                       sizeof(bq->init_data));
1444 +
1445 +       bq2415x_reset_chip(bq);
1446 +
1447 +       ret = bq2415x_power_supply_init(bq);
1448 +       if (ret) {
1449 +               dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1450 +               goto error_3;
1451 +       }
1452 +
1453 +       ret = bq2415x_sysfs_init(bq);
1454 +       if (ret) {
1455 +               dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1456 +               goto error_4;
1457 +       }
1458 +
1459 +       ret = bq2415x_set_defaults(bq);
1460 +       if (ret) {
1461 +               dev_err(bq->dev, "failed to set default values: %d\n", ret);
1462 +               goto error_5;
1463 +       }
1464 +
1465 +       if (bq->init_data.set_charger_type_hook) {
1466 +               if (bq->init_data.set_charger_type_hook(
1467 +                               bq2415x_set_charger_type, bq)) {
1468 +                       bq->automode = 1;
1469 +                       dev_info(bq->dev, "automode enabled\n");
1470 +               } else {
1471 +                       bq->automode = -1;
1472 +                       dev_info(bq->dev, "automode not supported\n");
1473 +               }
1474 +       } else {
1475 +               bq->automode = -1;
1476 +               dev_info(bq->dev, "automode not supported\n");
1477 +       }
1478 +
1479 +       INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1480 +       bq2415x_set_autotimer(bq, 1);
1481 +
1482 +       dev_info(bq->dev, "driver registred\n");
1483 +       return 0;
1484 +
1485 +error_5:
1486 +       bq2415x_sysfs_exit(bq);
1487 +error_4:
1488 +       bq2415x_power_supply_exit(bq);
1489 +error_3:
1490 +       kfree(bq);
1491 +error_2:
1492 +       kfree(name);
1493 +error_1:
1494 +       mutex_lock(&bq2415x_id_mutex);
1495 +       idr_remove(&bq2415x_id, num);
1496 +       mutex_unlock(&bq2415x_id_mutex);
1497 +
1498 +       return ret;
1499 +}
1500 +
1501 +/* bq2415x unregister */
1502 +
1503 +static int bq2415x_remove(struct i2c_client *client)
1504 +{
1505 +       struct bq2415x_device *bq = i2c_get_clientdata(client);
1506 +
1507 +       if (bq->init_data.set_charger_type_hook)
1508 +               bq->init_data.set_charger_type_hook(NULL, NULL);
1509 +
1510 +       bq2415x_sysfs_exit(bq);
1511 +       bq2415x_power_supply_exit(bq);
1512 +
1513 +       bq2415x_reset_chip(bq);
1514 +
1515 +       mutex_lock(&bq2415x_id_mutex);
1516 +       idr_remove(&bq2415x_id, bq->id);
1517 +       mutex_unlock(&bq2415x_id_mutex);
1518 +
1519 +       dev_info(bq->dev, "driver unregistred\n");
1520 +
1521 +       kfree(bq->name);
1522 +       kfree(bq);
1523 +
1524 +       return 0;
1525 +}
1526 +
1527 +static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1528 +       { "bq2415x", BQUNKNOWN },
1529 +       { "bq24150", BQ24150 },
1530 +       { "bq24150a", BQ24150A },
1531 +       { "bq24151", BQ24151 },
1532 +       { "bq24151a", BQ24151A },
1533 +       { "bq24152", BQ24152 },
1534 +       { "bq24153", BQ24153 },
1535 +       { "bq24153a", BQ24153A },
1536 +       { "bq24155", BQ24155 },
1537 +       { "bq24156", BQ24156 },
1538 +       { "bq24156a", BQ24156A },
1539 +       { "bq24158", BQ24158 },
1540 +       {},
1541 +};
1542 +MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1543 +
1544 +static struct i2c_driver bq2415x_driver = {
1545 +       .driver = {
1546 +               .name = "bq2415x-charger",
1547 +       },
1548 +       .probe = bq2415x_probe,
1549 +       .remove = bq2415x_remove,
1550 +       .id_table = bq2415x_i2c_id_table,
1551 +};
1552 +
1553 +static int __init bq2415x_init(void)
1554 +{
1555 +       return i2c_add_driver(&bq2415x_driver);
1556 +}
1557 +module_init(bq2415x_init);
1558 +
1559 +static void __exit bq2415x_exit(void)
1560 +{
1561 +       i2c_del_driver(&bq2415x_driver);
1562 +}
1563 +module_exit(bq2415x_exit);
1564 +
1565 +MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1566 +MODULE_DESCRIPTION("bq2415x charger driver");
1567 +MODULE_LICENSE("GPL");
1568 --- /dev/null   2012-04-29 08:55:34.366920721 +0200
1569 +++ kernel-power/include/linux/power/bq2415x_charger.h  2012-01-27 15:47:45.689585447 +0100
1570 @@ -0,0 +1,78 @@
1571 +/*
1572 +    bq2415x_charger.h - bq2415x charger driver
1573 +    Copyright (C) 2011-2012  Pali Rohár <pali.rohar@gmail.com>
1574 +
1575 +    This program is free software; you can redistribute it and/or modify
1576 +    it under the terms of the GNU General Public License as published by
1577 +    the Free Software Foundation; either version 2 of the License, or
1578 +    (at your option) any later version.
1579 +
1580 +    This program is distributed in the hope that it will be useful,
1581 +    but WITHOUT ANY WARRANTY; without even the implied warranty of
1582 +    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
1583 +    GNU General Public License for more details.
1584 +
1585 +    You should have received a copy of the GNU General Public License along
1586 +    with this program; if not, write to the Free Software Foundation, Inc.,
1587 +    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
1588 +*/
1589 +
1590 +#ifndef BQ2415X_CHARGER_H
1591 +#define BQ2415X_CHARGER_H
1592 +
1593 +/*
1594 +  This is platform data for bq2415x chip. It contains default board volatages
1595 +  and currents which can be also later configured via sysfs. If value is -1
1596 +  then default chip value (specified in datasheet) will be used.
1597 +
1598 +  Value resistor_sense is needed for for configuring charge and termination
1599 +  current. It it is less or equal to zero, configuring charge and termination
1600 +  current will not be possible.
1601 +
1602 +  Function set_charger_type_hook is needed for automode (setting correct
1603 +  current limit when charger is connected/disconnected). When is NULL,
1604 +  automode function is disabled. When is not NULL, it must have this prototype:
1605 +
1606 +    int (*set_charger_type_hook)(void (*hook)(int type, void *data), void *data)
1607 +
1608 +  and bq2415x driver will call it as:
1609 +
1610 +    platform_data->set_charger_type_hook(bq_hook_function, bq_private_data);
1611 +
1612 +  Board/platform function set_charger_type_hook return non zero when hook
1613 +  function was successfull registred. Platform code should call that hook
1614 +  function (which get from pointer, with data) every time when charger was
1615 +  connected/disconnected. bq driver then set correct current limit.
1616 +
1617 +  Hook function has this prototype:
1618 +
1619 +    void hook(int type, void *data);
1620 +
1621 +  type is:
1622 +    0 - for unknown or none charger (max current limit is 100mA)
1623 +    1 - for usb host/hub charger (max current limit is 500mA)
1624 +    2 - for dedicated charger (unlimited)
1625 +
1626 +  data is pointer to bq_private_data (which get from set_charger_type_hook)
1627 +
1628 +  When bq driver is being unloaded, it call function:
1629 +
1630 +    platform_data->set_charger_type_hook(NULL, NULL);
1631 +
1632 +  After thet board/platform code must not call bq hook function! It is
1633 +  possible that pointer to hook function will not be valid.
1634 +
1635 +*/
1636 +
1637 +struct bq2415x_platform_data {
1638 +       int current_limit;              /* mA */
1639 +       int weak_battery_voltage;       /* mV */
1640 +       int battery_regulation_voltage; /* mV */
1641 +       int charge_current;             /* mA */
1642 +       int termination_current;        /* mA */
1643 +       int resistor_sense;             /* m ohm */
1644 +       int (*set_charger_type_hook)(void (*hook)(int type, void *data),
1645 +                                    void *data);
1646 +};
1647 +
1648 +#endif
1649 --- kernel-power/drivers/power/Makefile.orig    2012-04-29 18:03:10.751810073 +0200
1650 +++ kernel-power/drivers/power/Makefile 2012-04-29 18:03:52.207808860 +0200
1651 @@ -25,3 +25,4 @@ obj-$(CONFIG_TWL4030_BCI_BATTERY)     += twl
1652  obj-$(CONFIG_BATTERY_TOSA)     += tosa_battery.o
1653  obj-$(CONFIG_BATTERY_WM97XX)   += wm97xx_battery.o
1654  obj-$(CONFIG_BATTERY_BQ27x00)  += bq27x00_battery.o
1655 +obj-$(CONFIG_CHARGER_BQ2415X)  += bq2415x_charger.o
1656 --- kernel-power/drivers/power/Kconfig.orig     2012-04-29 18:01:48.819812466 +0200
1657 +++ kernel-power/drivers/power/Kconfig  2012-04-29 18:03:06.043810209 +0200
1658 @@ -75,4 +75,10 @@ config BATTERY_BQ27x00
1659         help
1660           Say Y here to enable support for batteries with BQ27200(I2C) chip.
1661
1662 +config CHARGER_BQ2415X
1663 +       tristate "BQ2415X charger driver"
1664 +       depends on I2C
1665 +       help
1666 +         Say Y here to enable support for chargers with BQ2415X(I2C) chip.
1667 +
1668  endif # POWER_SUPPLY