drivers/power/supply/bq27xxx_battery.c

   1 /*
   2  * BQ27xxx battery driver
   3  *
   4  * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
   5  * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
   6  * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
   7  * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com>
   8  *
   9  * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
  10  *
  11  * This package is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * Datasheets:
  20  * http://www.ti.com/product/bq27000
  21  * http://www.ti.com/product/bq27200
  22  * http://www.ti.com/product/bq27010
  23  * http://www.ti.com/product/bq27210
  24  * http://www.ti.com/product/bq27500
  25  * http://www.ti.com/product/bq27510-g1
  26  * http://www.ti.com/product/bq27510-g2
  27  * http://www.ti.com/product/bq27510-g3
  28  * http://www.ti.com/product/bq27520-g4
  29  * http://www.ti.com/product/bq27520-g1
  30  * http://www.ti.com/product/bq27520-g2
  31  * http://www.ti.com/product/bq27520-g3
  32  * http://www.ti.com/product/bq27530-g1
  33  * http://www.ti.com/product/bq27531-g1
  34  * http://www.ti.com/product/bq27541-g1
  35  * http://www.ti.com/product/bq27542-g1
  36  * http://www.ti.com/product/bq27546-g1
  37  * http://www.ti.com/product/bq27742-g1
  38  * http://www.ti.com/product/bq27545-g1
  39  * http://www.ti.com/product/bq27421-g1
  40  * http://www.ti.com/product/bq27425-g1
  41  * http://www.ti.com/product/bq27411-g1
  42  * http://www.ti.com/product/bq27621-g1
  43  */
  44
  45 #include <linux/device.h>
  46 #include <linux/module.h>
  47 #include <linux/mutex.h>
  48 #include <linux/param.h>
  49 #include <linux/jiffies.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/delay.h>
  52 #include <linux/platform_device.h>
  53 #include <linux/power_supply.h>
  54 #include <linux/slab.h>
  55 #include <linux/of.h>
  56
  57 #include <linux/power/bq27xxx_battery.h>
  58
  59 #define DRIVER_VERSION          "1.2.0"
  60
  61 #define BQ27XXX_MANUFACTURER    "Texas Instruments"
  62
  63 /* BQ27XXX Flags */
  64 #define BQ27XXX_FLAG_DSC        BIT(0)
  65 #define BQ27XXX_FLAG_SOCF       BIT(1) /* State-of-Charge threshold final */
  66 #define BQ27XXX_FLAG_SOC1       BIT(2) /* State-of-Charge threshold 1 */
  67 #define BQ27XXX_FLAG_FC         BIT(9)
  68 #define BQ27XXX_FLAG_OTD        BIT(14)
  69 #define BQ27XXX_FLAG_OTC        BIT(15)
  70 #define BQ27XXX_FLAG_UT         BIT(14)
  71 #define BQ27XXX_FLAG_OT         BIT(15)
  72
  73 /* BQ27000 has different layout for Flags register */
  74 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  75 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  76 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  77 #define BQ27000_FLAG_FC         BIT(5)
  78 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  79
  80 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  81 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  82 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  83
  84 #define INVALID_REG_ADDR        0xff
  85
  86 /*
  87  * bq27xxx_reg_index - Register names
  88  *
  89  * These are indexes into a device's register mapping array.
  90  */
  91
  92 enum bq27xxx_reg_index {
  93         BQ27XXX_REG_CTRL = 0,   /* Control */
  94         BQ27XXX_REG_TEMP,       /* Temperature */
  95         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
  96         BQ27XXX_REG_VOLT,       /* Voltage */
  97         BQ27XXX_REG_AI,         /* Average Current */
  98         BQ27XXX_REG_FLAGS,      /* Flags */
  99         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 100         BQ27XXX_REG_TTF,        /* Time-to-Full */
 101         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 102         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 103         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 104         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 105         BQ27XXX_REG_CYCT,       /* Cycle Count */
 106         BQ27XXX_REG_AE,         /* Available Energy */
 107         BQ27XXX_REG_SOC,        /* State-of-Charge */
 108         BQ27XXX_REG_DCAP,       /* Design Capacity */
 109         BQ27XXX_REG_AP,         /* Average Power */
 110         BQ27XXX_REG_MAX,        /* sentinel */
 111 };
 112
 113 /* Register mappings */
 114 static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
 115         [BQ27000] = {
 116                 [BQ27XXX_REG_CTRL] = 0x00,
 117                 [BQ27XXX_REG_TEMP] = 0x06,
 118                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 119                 [BQ27XXX_REG_VOLT] = 0x08,
 120                 [BQ27XXX_REG_AI] = 0x14,
 121                 [BQ27XXX_REG_FLAGS] = 0x0a,
 122                 [BQ27XXX_REG_TTE] = 0x16,
 123                 [BQ27XXX_REG_TTF] = 0x18,
 124                 [BQ27XXX_REG_TTES] = 0x1c,
 125                 [BQ27XXX_REG_TTECP] = 0x26,
 126                 [BQ27XXX_REG_NAC] = 0x0c,
 127                 [BQ27XXX_REG_FCC] = 0x12,
 128                 [BQ27XXX_REG_CYCT] = 0x2a,
 129                 [BQ27XXX_REG_AE] = 0x22,
 130                 [BQ27XXX_REG_SOC] = 0x0b,
 131                 [BQ27XXX_REG_DCAP] = 0x76,
 132                 [BQ27XXX_REG_AP] = 0x24,
 133         },
 134         [BQ27010] = {
 135                 [BQ27XXX_REG_CTRL] = 0x00,
 136                 [BQ27XXX_REG_TEMP] = 0x06,
 137                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 138                 [BQ27XXX_REG_VOLT] = 0x08,
 139                 [BQ27XXX_REG_AI] = 0x14,
 140                 [BQ27XXX_REG_FLAGS] = 0x0a,
 141                 [BQ27XXX_REG_TTE] = 0x16,
 142                 [BQ27XXX_REG_TTF] = 0x18,
 143                 [BQ27XXX_REG_TTES] = 0x1c,
 144                 [BQ27XXX_REG_TTECP] = 0x26,
 145                 [BQ27XXX_REG_NAC] = 0x0c,
 146                 [BQ27XXX_REG_FCC] = 0x12,
 147                 [BQ27XXX_REG_CYCT] = 0x2a,
 148                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 149                 [BQ27XXX_REG_SOC] = 0x0b,
 150                 [BQ27XXX_REG_DCAP] = 0x76,
 151                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 152         },
 153         [BQ2750X] = {
 154                 [BQ27XXX_REG_CTRL] = 0x00,
 155                 [BQ27XXX_REG_TEMP] = 0x06,
 156                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 157                 [BQ27XXX_REG_VOLT] = 0x08,
 158                 [BQ27XXX_REG_AI] = 0x14,
 159                 [BQ27XXX_REG_FLAGS] = 0x0a,
 160                 [BQ27XXX_REG_TTE] = 0x16,
 161                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 162                 [BQ27XXX_REG_TTES] = 0x1a,
 163                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 164                 [BQ27XXX_REG_NAC] = 0x0c,
 165                 [BQ27XXX_REG_FCC] = 0x12,
 166                 [BQ27XXX_REG_CYCT] = 0x2a,
 167                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 168                 [BQ27XXX_REG_SOC] = 0x2c,
 169                 [BQ27XXX_REG_DCAP] = 0x3c,
 170                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 171         },
 172         [BQ2751X] = {
 173                 [BQ27XXX_REG_CTRL] = 0x00,
 174                 [BQ27XXX_REG_TEMP] = 0x06,
 175                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 176                 [BQ27XXX_REG_VOLT] = 0x08,
 177                 [BQ27XXX_REG_AI] = 0x14,
 178                 [BQ27XXX_REG_FLAGS] = 0x0a,
 179                 [BQ27XXX_REG_TTE] = 0x16,
 180                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 181                 [BQ27XXX_REG_TTES] = 0x1a,
 182                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 183                 [BQ27XXX_REG_NAC] = 0x0c,
 184                 [BQ27XXX_REG_FCC] = 0x12,
 185                 [BQ27XXX_REG_CYCT] = 0x1e,
 186                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 187                 [BQ27XXX_REG_SOC] = 0x20,
 188                 [BQ27XXX_REG_DCAP] = 0x2e,
 189                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 190         },
 191         [BQ27500] = {
 192                 [BQ27XXX_REG_CTRL] = 0x00,
 193                 [BQ27XXX_REG_TEMP] = 0x06,
 194                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 195                 [BQ27XXX_REG_VOLT] = 0x08,
 196                 [BQ27XXX_REG_AI] = 0x14,
 197                 [BQ27XXX_REG_FLAGS] = 0x0a,
 198                 [BQ27XXX_REG_TTE] = 0x16,
 199                 [BQ27XXX_REG_TTF] = 0x18,
 200                 [BQ27XXX_REG_TTES] = 0x1c,
 201                 [BQ27XXX_REG_TTECP] = 0x26,
 202                 [BQ27XXX_REG_NAC] = 0x0c,
 203                 [BQ27XXX_REG_FCC] = 0x12,
 204                 [BQ27XXX_REG_CYCT] = 0x2a,
 205                 [BQ27XXX_REG_AE] = 0x22,
 206                 [BQ27XXX_REG_SOC] = 0x2c,
 207                 [BQ27XXX_REG_DCAP] = 0x3c,
 208                 [BQ27XXX_REG_AP] = 0x24,
 209         },
 210         [BQ27510G1] = {
 211                 [BQ27XXX_REG_CTRL] = 0x00,
 212                 [BQ27XXX_REG_TEMP] = 0x06,
 213                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 214                 [BQ27XXX_REG_VOLT] = 0x08,
 215                 [BQ27XXX_REG_AI] = 0x14,
 216                 [BQ27XXX_REG_FLAGS] = 0x0a,
 217                 [BQ27XXX_REG_TTE] = 0x16,
 218                 [BQ27XXX_REG_TTF] = 0x18,
 219                 [BQ27XXX_REG_TTES] = 0x1c,
 220                 [BQ27XXX_REG_TTECP] = 0x26,
 221                 [BQ27XXX_REG_NAC] = 0x0c,
 222                 [BQ27XXX_REG_FCC] = 0x12,
 223                 [BQ27XXX_REG_CYCT] = 0x2a,
 224                 [BQ27XXX_REG_AE] = 0x22,
 225                 [BQ27XXX_REG_SOC] = 0x2c,
 226                 [BQ27XXX_REG_DCAP] = 0x3c,
 227                 [BQ27XXX_REG_AP] = 0x24,
 228         },
 229         [BQ27510G2] = {
 230                 [BQ27XXX_REG_CTRL] = 0x00,
 231                 [BQ27XXX_REG_TEMP] = 0x06,
 232                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 233                 [BQ27XXX_REG_VOLT] = 0x08,
 234                 [BQ27XXX_REG_AI] = 0x14,
 235                 [BQ27XXX_REG_FLAGS] = 0x0a,
 236                 [BQ27XXX_REG_TTE] = 0x16,
 237                 [BQ27XXX_REG_TTF] = 0x18,
 238                 [BQ27XXX_REG_TTES] = 0x1c,
 239                 [BQ27XXX_REG_TTECP] = 0x26,
 240                 [BQ27XXX_REG_NAC] = 0x0c,
 241                 [BQ27XXX_REG_FCC] = 0x12,
 242                 [BQ27XXX_REG_CYCT] = 0x2a,
 243                 [BQ27XXX_REG_AE] = 0x22,
 244                 [BQ27XXX_REG_SOC] = 0x2c,
 245                 [BQ27XXX_REG_DCAP] = 0x3c,
 246                 [BQ27XXX_REG_AP] = 0x24,
 247         },
 248         [BQ27510G3] = {
 249                 [BQ27XXX_REG_CTRL] = 0x00,
 250                 [BQ27XXX_REG_TEMP] = 0x06,
 251                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 252                 [BQ27XXX_REG_VOLT] = 0x08,
 253                 [BQ27XXX_REG_AI] = 0x14,
 254                 [BQ27XXX_REG_FLAGS] = 0x0a,
 255                 [BQ27XXX_REG_TTE] = 0x16,
 256                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 257                 [BQ27XXX_REG_TTES] = 0x1a,
 258                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 259                 [BQ27XXX_REG_NAC] = 0x0c,
 260                 [BQ27XXX_REG_FCC] = 0x12,
 261                 [BQ27XXX_REG_CYCT] = 0x1e,
 262                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 263                 [BQ27XXX_REG_SOC] = 0x20,
 264                 [BQ27XXX_REG_DCAP] = 0x2e,
 265                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 266         },
 267         [BQ27520G1] = {
 268                 [BQ27XXX_REG_CTRL] = 0x00,
 269                 [BQ27XXX_REG_TEMP] = 0x06,
 270                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 271                 [BQ27XXX_REG_VOLT] = 0x08,
 272                 [BQ27XXX_REG_AI] = 0x14,
 273                 [BQ27XXX_REG_FLAGS] = 0x0a,
 274                 [BQ27XXX_REG_TTE] = 0x16,
 275                 [BQ27XXX_REG_TTF] = 0x18,
 276                 [BQ27XXX_REG_TTES] = 0x1c,
 277                 [BQ27XXX_REG_TTECP] = 0x26,
 278                 [BQ27XXX_REG_NAC] = 0x0c,
 279                 [BQ27XXX_REG_FCC] = 0x12,
 280                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 281                 [BQ27XXX_REG_AE] = 0x22,
 282                 [BQ27XXX_REG_SOC] = 0x2c,
 283                 [BQ27XXX_REG_DCAP] = 0x3c,
 284                 [BQ27XXX_REG_AP] = 0x24,
 285         },
 286         [BQ27520G2] = {
 287                 [BQ27XXX_REG_CTRL] = 0x00,
 288                 [BQ27XXX_REG_TEMP] = 0x06,
 289                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 290                 [BQ27XXX_REG_VOLT] = 0x08,
 291                 [BQ27XXX_REG_AI] = 0x14,
 292                 [BQ27XXX_REG_FLAGS] = 0x0a,
 293                 [BQ27XXX_REG_TTE] = 0x16,
 294                 [BQ27XXX_REG_TTF] = 0x18,
 295                 [BQ27XXX_REG_TTES] = 0x1c,
 296                 [BQ27XXX_REG_TTECP] = 0x26,
 297                 [BQ27XXX_REG_NAC] = 0x0c,
 298                 [BQ27XXX_REG_FCC] = 0x12,
 299                 [BQ27XXX_REG_CYCT] = 0x2a,
 300                 [BQ27XXX_REG_AE] = 0x22,
 301                 [BQ27XXX_REG_SOC] = 0x2c,
 302                 [BQ27XXX_REG_DCAP] = 0x3c,
 303                 [BQ27XXX_REG_AP] = 0x24,
 304         },
 305         [BQ27520G3] = {
 306                 [BQ27XXX_REG_CTRL] = 0x00,
 307                 [BQ27XXX_REG_TEMP] = 0x06,
 308                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 309                 [BQ27XXX_REG_VOLT] = 0x08,
 310                 [BQ27XXX_REG_AI] = 0x14,
 311                 [BQ27XXX_REG_FLAGS] = 0x0a,
 312                 [BQ27XXX_REG_TTE] = 0x16,
 313                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 314                 [BQ27XXX_REG_TTES] = 0x1c,
 315                 [BQ27XXX_REG_TTECP] = 0x26,
 316                 [BQ27XXX_REG_NAC] = 0x0c,
 317                 [BQ27XXX_REG_FCC] = 0x12,
 318                 [BQ27XXX_REG_CYCT] = 0x2a,
 319                 [BQ27XXX_REG_AE] = 0x22,
 320                 [BQ27XXX_REG_SOC] = 0x2c,
 321                 [BQ27XXX_REG_DCAP] = 0x3c,
 322                 [BQ27XXX_REG_AP] = 0x24,
 323         },
 324         [BQ27530] = {
 325                 [BQ27XXX_REG_CTRL] = 0x00,
 326                 [BQ27XXX_REG_TEMP] = 0x06,
 327                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 328                 [BQ27XXX_REG_VOLT] = 0x08,
 329                 [BQ27XXX_REG_AI] = 0x14,
 330                 [BQ27XXX_REG_FLAGS] = 0x0a,
 331                 [BQ27XXX_REG_TTE] = 0x16,
 332                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 333                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 334                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 335                 [BQ27XXX_REG_NAC] = 0x0c,
 336                 [BQ27XXX_REG_FCC] = 0x12,
 337                 [BQ27XXX_REG_CYCT] = 0x2a,
 338                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 339                 [BQ27XXX_REG_SOC] = 0x2c,
 340                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 341                 [BQ27XXX_REG_AP] = 0x24,
 342         },
 343         [BQ27541] = {
 344                 [BQ27XXX_REG_CTRL] = 0x00,
 345                 [BQ27XXX_REG_TEMP] = 0x06,
 346                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 347                 [BQ27XXX_REG_VOLT] = 0x08,
 348                 [BQ27XXX_REG_AI] = 0x14,
 349                 [BQ27XXX_REG_FLAGS] = 0x0a,
 350                 [BQ27XXX_REG_TTE] = 0x16,
 351                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 352                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 353                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 354                 [BQ27XXX_REG_NAC] = 0x0c,
 355                 [BQ27XXX_REG_FCC] = 0x12,
 356                 [BQ27XXX_REG_CYCT] = 0x2a,
 357                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 358                 [BQ27XXX_REG_SOC] = 0x2c,
 359                 [BQ27XXX_REG_DCAP] = 0x3c,
 360                 [BQ27XXX_REG_AP] = 0x24,
 361         },
 362         [BQ27545] = {
 363                 [BQ27XXX_REG_CTRL] = 0x00,
 364                 [BQ27XXX_REG_TEMP] = 0x06,
 365                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 366                 [BQ27XXX_REG_VOLT] = 0x08,
 367                 [BQ27XXX_REG_AI] = 0x14,
 368                 [BQ27XXX_REG_FLAGS] = 0x0a,
 369                 [BQ27XXX_REG_TTE] = 0x16,
 370                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 371                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 372                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 373                 [BQ27XXX_REG_NAC] = 0x0c,
 374                 [BQ27XXX_REG_FCC] = 0x12,
 375                 [BQ27XXX_REG_CYCT] = 0x2a,
 376                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 377                 [BQ27XXX_REG_SOC] = 0x2c,
 378                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 379                 [BQ27XXX_REG_AP] = 0x24,
 380         },
 381         [BQ27421] = {
 382                 [BQ27XXX_REG_CTRL] = 0x00,
 383                 [BQ27XXX_REG_TEMP] = 0x02,
 384                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 385                 [BQ27XXX_REG_VOLT] = 0x04,
 386                 [BQ27XXX_REG_AI] = 0x10,
 387                 [BQ27XXX_REG_FLAGS] = 0x06,
 388                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 389                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 390                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 391                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 392                 [BQ27XXX_REG_NAC] = 0x08,
 393                 [BQ27XXX_REG_FCC] = 0x0e,
 394                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 395                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 396                 [BQ27XXX_REG_SOC] = 0x1c,
 397                 [BQ27XXX_REG_DCAP] = 0x3c,
 398                 [BQ27XXX_REG_AP] = 0x18,
 399         },
 400 };
 401
 402 static enum power_supply_property bq27000_battery_props[] = {
 403         POWER_SUPPLY_PROP_STATUS,
 404         POWER_SUPPLY_PROP_PRESENT,
 405         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 406         POWER_SUPPLY_PROP_CURRENT_NOW,
 407         POWER_SUPPLY_PROP_CAPACITY,
 408         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 409         POWER_SUPPLY_PROP_TEMP,
 410         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 411         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 412         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 413         POWER_SUPPLY_PROP_TECHNOLOGY,
 414         POWER_SUPPLY_PROP_CHARGE_FULL,
 415         POWER_SUPPLY_PROP_CHARGE_NOW,
 416         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 417         POWER_SUPPLY_PROP_CYCLE_COUNT,
 418         POWER_SUPPLY_PROP_ENERGY_NOW,
 419         POWER_SUPPLY_PROP_POWER_AVG,
 420         POWER_SUPPLY_PROP_HEALTH,
 421         POWER_SUPPLY_PROP_MANUFACTURER,
 422 };
 423
 424 static enum power_supply_property bq27010_battery_props[] = {
 425         POWER_SUPPLY_PROP_STATUS,
 426         POWER_SUPPLY_PROP_PRESENT,
 427         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 428         POWER_SUPPLY_PROP_CURRENT_NOW,
 429         POWER_SUPPLY_PROP_CAPACITY,
 430         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 431         POWER_SUPPLY_PROP_TEMP,
 432         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 433         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 434         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 435         POWER_SUPPLY_PROP_TECHNOLOGY,
 436         POWER_SUPPLY_PROP_CHARGE_FULL,
 437         POWER_SUPPLY_PROP_CHARGE_NOW,
 438         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 439         POWER_SUPPLY_PROP_CYCLE_COUNT,
 440         POWER_SUPPLY_PROP_HEALTH,
 441         POWER_SUPPLY_PROP_MANUFACTURER,
 442 };
 443
 444 static enum power_supply_property bq2750x_battery_props[] = {
 445         POWER_SUPPLY_PROP_STATUS,
 446         POWER_SUPPLY_PROP_PRESENT,
 447         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 448         POWER_SUPPLY_PROP_CURRENT_NOW,
 449         POWER_SUPPLY_PROP_CAPACITY,
 450         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 451         POWER_SUPPLY_PROP_TEMP,
 452         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 453         POWER_SUPPLY_PROP_TECHNOLOGY,
 454         POWER_SUPPLY_PROP_CHARGE_FULL,
 455         POWER_SUPPLY_PROP_CHARGE_NOW,
 456         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 457         POWER_SUPPLY_PROP_CYCLE_COUNT,
 458         POWER_SUPPLY_PROP_HEALTH,
 459         POWER_SUPPLY_PROP_MANUFACTURER,
 460 };
 461
 462 static enum power_supply_property bq2751x_battery_props[] = {
 463         POWER_SUPPLY_PROP_STATUS,
 464         POWER_SUPPLY_PROP_PRESENT,
 465         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 466         POWER_SUPPLY_PROP_CURRENT_NOW,
 467         POWER_SUPPLY_PROP_CAPACITY,
 468         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 469         POWER_SUPPLY_PROP_TEMP,
 470         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 471         POWER_SUPPLY_PROP_TECHNOLOGY,
 472         POWER_SUPPLY_PROP_CHARGE_FULL,
 473         POWER_SUPPLY_PROP_CHARGE_NOW,
 474         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 475         POWER_SUPPLY_PROP_CYCLE_COUNT,
 476         POWER_SUPPLY_PROP_HEALTH,
 477         POWER_SUPPLY_PROP_MANUFACTURER,
 478 };
 479
 480 static enum power_supply_property bq27500_battery_props[] = {
 481         POWER_SUPPLY_PROP_STATUS,
 482         POWER_SUPPLY_PROP_PRESENT,
 483         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 484         POWER_SUPPLY_PROP_CURRENT_NOW,
 485         POWER_SUPPLY_PROP_CAPACITY,
 486         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 487         POWER_SUPPLY_PROP_TEMP,
 488         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 489         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 490         POWER_SUPPLY_PROP_TECHNOLOGY,
 491         POWER_SUPPLY_PROP_CHARGE_FULL,
 492         POWER_SUPPLY_PROP_CHARGE_NOW,
 493         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 494         POWER_SUPPLY_PROP_CYCLE_COUNT,
 495         POWER_SUPPLY_PROP_ENERGY_NOW,
 496         POWER_SUPPLY_PROP_POWER_AVG,
 497         POWER_SUPPLY_PROP_HEALTH,
 498         POWER_SUPPLY_PROP_MANUFACTURER,
 499 };
 500
 501 static enum power_supply_property bq27510g1_battery_props[] = {
 502         POWER_SUPPLY_PROP_STATUS,
 503         POWER_SUPPLY_PROP_PRESENT,
 504         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 505         POWER_SUPPLY_PROP_CURRENT_NOW,
 506         POWER_SUPPLY_PROP_CAPACITY,
 507         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 508         POWER_SUPPLY_PROP_TEMP,
 509         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 510         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 511         POWER_SUPPLY_PROP_TECHNOLOGY,
 512         POWER_SUPPLY_PROP_CHARGE_FULL,
 513         POWER_SUPPLY_PROP_CHARGE_NOW,
 514         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 515         POWER_SUPPLY_PROP_CYCLE_COUNT,
 516         POWER_SUPPLY_PROP_ENERGY_NOW,
 517         POWER_SUPPLY_PROP_POWER_AVG,
 518         POWER_SUPPLY_PROP_HEALTH,
 519         POWER_SUPPLY_PROP_MANUFACTURER,
 520 };
 521
 522 static enum power_supply_property bq27510g2_battery_props[] = {
 523         POWER_SUPPLY_PROP_STATUS,
 524         POWER_SUPPLY_PROP_PRESENT,
 525         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 526         POWER_SUPPLY_PROP_CURRENT_NOW,
 527         POWER_SUPPLY_PROP_CAPACITY,
 528         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 529         POWER_SUPPLY_PROP_TEMP,
 530         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 531         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 532         POWER_SUPPLY_PROP_TECHNOLOGY,
 533         POWER_SUPPLY_PROP_CHARGE_FULL,
 534         POWER_SUPPLY_PROP_CHARGE_NOW,
 535         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 536         POWER_SUPPLY_PROP_CYCLE_COUNT,
 537         POWER_SUPPLY_PROP_ENERGY_NOW,
 538         POWER_SUPPLY_PROP_POWER_AVG,
 539         POWER_SUPPLY_PROP_HEALTH,
 540         POWER_SUPPLY_PROP_MANUFACTURER,
 541 };
 542
 543 static enum power_supply_property bq27510g3_battery_props[] = {
 544         POWER_SUPPLY_PROP_STATUS,
 545         POWER_SUPPLY_PROP_PRESENT,
 546         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 547         POWER_SUPPLY_PROP_CURRENT_NOW,
 548         POWER_SUPPLY_PROP_CAPACITY,
 549         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 550         POWER_SUPPLY_PROP_TEMP,
 551         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 552         POWER_SUPPLY_PROP_TECHNOLOGY,
 553         POWER_SUPPLY_PROP_CHARGE_FULL,
 554         POWER_SUPPLY_PROP_CHARGE_NOW,
 555         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 556         POWER_SUPPLY_PROP_CYCLE_COUNT,
 557         POWER_SUPPLY_PROP_HEALTH,
 558         POWER_SUPPLY_PROP_MANUFACTURER,
 559 };
 560
 561 static enum power_supply_property bq27520g1_battery_props[] = {
 562         POWER_SUPPLY_PROP_STATUS,
 563         POWER_SUPPLY_PROP_PRESENT,
 564         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 565         POWER_SUPPLY_PROP_CURRENT_NOW,
 566         POWER_SUPPLY_PROP_CAPACITY,
 567         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 568         POWER_SUPPLY_PROP_TEMP,
 569         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 570         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 571         POWER_SUPPLY_PROP_TECHNOLOGY,
 572         POWER_SUPPLY_PROP_CHARGE_FULL,
 573         POWER_SUPPLY_PROP_CHARGE_NOW,
 574         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 575         POWER_SUPPLY_PROP_ENERGY_NOW,
 576         POWER_SUPPLY_PROP_POWER_AVG,
 577         POWER_SUPPLY_PROP_HEALTH,
 578         POWER_SUPPLY_PROP_MANUFACTURER,
 579 };
 580
 581 static enum power_supply_property bq27520g2_battery_props[] = {
 582         POWER_SUPPLY_PROP_STATUS,
 583         POWER_SUPPLY_PROP_PRESENT,
 584         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 585         POWER_SUPPLY_PROP_CURRENT_NOW,
 586         POWER_SUPPLY_PROP_CAPACITY,
 587         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 588         POWER_SUPPLY_PROP_TEMP,
 589         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 590         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 591         POWER_SUPPLY_PROP_TECHNOLOGY,
 592         POWER_SUPPLY_PROP_CHARGE_FULL,
 593         POWER_SUPPLY_PROP_CHARGE_NOW,
 594         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 595         POWER_SUPPLY_PROP_CYCLE_COUNT,
 596         POWER_SUPPLY_PROP_ENERGY_NOW,
 597         POWER_SUPPLY_PROP_POWER_AVG,
 598         POWER_SUPPLY_PROP_HEALTH,
 599         POWER_SUPPLY_PROP_MANUFACTURER,
 600 };
 601
 602 static enum power_supply_property bq27520g3_battery_props[] = {
 603         POWER_SUPPLY_PROP_STATUS,
 604         POWER_SUPPLY_PROP_PRESENT,
 605         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 606         POWER_SUPPLY_PROP_CURRENT_NOW,
 607         POWER_SUPPLY_PROP_CAPACITY,
 608         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 609         POWER_SUPPLY_PROP_TEMP,
 610         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 611         POWER_SUPPLY_PROP_TECHNOLOGY,
 612         POWER_SUPPLY_PROP_CHARGE_FULL,
 613         POWER_SUPPLY_PROP_CHARGE_NOW,
 614         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 615         POWER_SUPPLY_PROP_CYCLE_COUNT,
 616         POWER_SUPPLY_PROP_ENERGY_NOW,
 617         POWER_SUPPLY_PROP_POWER_AVG,
 618         POWER_SUPPLY_PROP_HEALTH,
 619         POWER_SUPPLY_PROP_MANUFACTURER,
 620 };
 621
 622 static enum power_supply_property bq27530_battery_props[] = {
 623         POWER_SUPPLY_PROP_STATUS,
 624         POWER_SUPPLY_PROP_PRESENT,
 625         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 626         POWER_SUPPLY_PROP_CURRENT_NOW,
 627         POWER_SUPPLY_PROP_CAPACITY,
 628         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 629         POWER_SUPPLY_PROP_TEMP,
 630         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 631         POWER_SUPPLY_PROP_TECHNOLOGY,
 632         POWER_SUPPLY_PROP_CHARGE_FULL,
 633         POWER_SUPPLY_PROP_CHARGE_NOW,
 634         POWER_SUPPLY_PROP_POWER_AVG,
 635         POWER_SUPPLY_PROP_HEALTH,
 636         POWER_SUPPLY_PROP_CYCLE_COUNT,
 637         POWER_SUPPLY_PROP_MANUFACTURER,
 638 };
 639
 640 static enum power_supply_property bq27541_battery_props[] = {
 641         POWER_SUPPLY_PROP_STATUS,
 642         POWER_SUPPLY_PROP_PRESENT,
 643         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 644         POWER_SUPPLY_PROP_CURRENT_NOW,
 645         POWER_SUPPLY_PROP_CAPACITY,
 646         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 647         POWER_SUPPLY_PROP_TEMP,
 648         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 649         POWER_SUPPLY_PROP_TECHNOLOGY,
 650         POWER_SUPPLY_PROP_CHARGE_FULL,
 651         POWER_SUPPLY_PROP_CHARGE_NOW,
 652         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 653         POWER_SUPPLY_PROP_CYCLE_COUNT,
 654         POWER_SUPPLY_PROP_POWER_AVG,
 655         POWER_SUPPLY_PROP_HEALTH,
 656         POWER_SUPPLY_PROP_MANUFACTURER,
 657 };
 658
 659 static enum power_supply_property bq27545_battery_props[] = {
 660         POWER_SUPPLY_PROP_STATUS,
 661         POWER_SUPPLY_PROP_PRESENT,
 662         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 663         POWER_SUPPLY_PROP_CURRENT_NOW,
 664         POWER_SUPPLY_PROP_CAPACITY,
 665         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 666         POWER_SUPPLY_PROP_TEMP,
 667         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 668         POWER_SUPPLY_PROP_TECHNOLOGY,
 669         POWER_SUPPLY_PROP_CHARGE_FULL,
 670         POWER_SUPPLY_PROP_CHARGE_NOW,
 671         POWER_SUPPLY_PROP_HEALTH,
 672         POWER_SUPPLY_PROP_CYCLE_COUNT,
 673         POWER_SUPPLY_PROP_POWER_AVG,
 674         POWER_SUPPLY_PROP_MANUFACTURER,
 675 };
 676
 677 static enum power_supply_property bq27421_battery_props[] = {
 678         POWER_SUPPLY_PROP_STATUS,
 679         POWER_SUPPLY_PROP_PRESENT,
 680         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 681         POWER_SUPPLY_PROP_CURRENT_NOW,
 682         POWER_SUPPLY_PROP_CAPACITY,
 683         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 684         POWER_SUPPLY_PROP_TEMP,
 685         POWER_SUPPLY_PROP_TECHNOLOGY,
 686         POWER_SUPPLY_PROP_CHARGE_FULL,
 687         POWER_SUPPLY_PROP_CHARGE_NOW,
 688         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 689         POWER_SUPPLY_PROP_MANUFACTURER,
 690 };
 691
 692 #define BQ27XXX_PROP(_id, _prop)                \
 693         [_id] = {                               \
 694                 .props = _prop,                 \
 695                 .size = ARRAY_SIZE(_prop),      \
 696         }
 697
 698 static struct {
 699         enum power_supply_property *props;
 700         size_t size;
 701 } bq27xxx_battery_props[] = {
 702         BQ27XXX_PROP(BQ27000, bq27000_battery_props),
 703         BQ27XXX_PROP(BQ27010, bq27010_battery_props),
 704         BQ27XXX_PROP(BQ2750X, bq2750x_battery_props),
 705         BQ27XXX_PROP(BQ2751X, bq2751x_battery_props),
 706         BQ27XXX_PROP(BQ27500, bq27500_battery_props),
 707         BQ27XXX_PROP(BQ27510G1, bq27510g1_battery_props),
 708         BQ27XXX_PROP(BQ27510G2, bq27510g2_battery_props),
 709         BQ27XXX_PROP(BQ27510G3, bq27510g3_battery_props),
 710         BQ27XXX_PROP(BQ27520G1, bq27520g1_battery_props),
 711         BQ27XXX_PROP(BQ27520G2, bq27520g2_battery_props),
 712         BQ27XXX_PROP(BQ27520G3, bq27520g3_battery_props),
 713         BQ27XXX_PROP(BQ27530, bq27530_battery_props),
 714         BQ27XXX_PROP(BQ27541, bq27541_battery_props),
 715         BQ27XXX_PROP(BQ27545, bq27545_battery_props),
 716         BQ27XXX_PROP(BQ27421, bq27421_battery_props),
 717 };
 718
 719 static DEFINE_MUTEX(bq27xxx_list_lock);
 720 static LIST_HEAD(bq27xxx_battery_devices);
 721
 722 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
 723 {
 724         struct bq27xxx_device_info *di;
 725         unsigned int prev_val = *(unsigned int *) kp->arg;
 726         int ret;
 727
 728         ret = param_set_uint(val, kp);
 729         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
 730                 return ret;
 731
 732         mutex_lock(&bq27xxx_list_lock);
 733         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
 734                 cancel_delayed_work_sync(&di->work);
 735                 schedule_delayed_work(&di->work, 0);
 736         }
 737         mutex_unlock(&bq27xxx_list_lock);
 738
 739         return ret;
 740 }
 741
 742 static const struct kernel_param_ops param_ops_poll_interval = {
 743         .get = param_get_uint,
 744         .set = poll_interval_param_set,
 745 };
 746
 747 static unsigned int poll_interval = 360;
 748 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
 749 MODULE_PARM_DESC(poll_interval,
 750                  "battery poll interval in seconds - 0 disables polling");
 751
 752 /*
 753  * Common code for BQ27xxx devices
 754  */
 755
 756 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
 757                                bool single)
 758 {
 759         /* Reports EINVAL for invalid/missing registers */
 760         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 761                 return -EINVAL;
 762
 763         return di->bus.read(di, di->regs[reg_index], single);
 764 }
 765
 766 /*
 767  * Return the battery State-of-Charge
 768  * Or < 0 if something fails.
 769  */
 770 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
 771 {
 772         int soc;
 773
 774         if (di->chip == BQ27000 || di->chip == BQ27010)
 775                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
 776         else
 777                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
 778
 779         if (soc < 0)
 780                 dev_dbg(di->dev, "error reading State-of-Charge\n");
 781
 782         return soc;
 783 }
 784
 785 /*
 786  * Return a battery charge value in µAh
 787  * Or < 0 if something fails.
 788  */
 789 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
 790 {
 791         int charge;
 792
 793         charge = bq27xxx_read(di, reg, false);
 794         if (charge < 0) {
 795                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
 796                         reg, charge);
 797                 return charge;
 798         }
 799
 800         if (di->chip == BQ27000 || di->chip == BQ27010)
 801                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
 802         else
 803                 charge *= 1000;
 804
 805         return charge;
 806 }
 807
 808 /*
 809  * Return the battery Nominal available capacity in µAh
 810  * Or < 0 if something fails.
 811  */
 812 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
 813 {
 814         int flags;
 815
 816         if (di->chip == BQ27000 || di->chip == BQ27010) {
 817                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
 818                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
 819                         return -ENODATA;
 820         }
 821
 822         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
 823 }
 824
 825 /*
 826  * Return the battery Full Charge Capacity in µAh
 827  * Or < 0 if something fails.
 828  */
 829 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
 830 {
 831         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
 832 }
 833
 834 /*
 835  * Return the Design Capacity in µAh
 836  * Or < 0 if something fails.
 837  */
 838 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
 839 {
 840         int dcap;
 841
 842         if (di->chip == BQ27000 || di->chip == BQ27010)
 843                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
 844         else
 845                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
 846
 847         if (dcap < 0) {
 848                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
 849                 return dcap;
 850         }
 851
 852         if (di->chip == BQ27000 || di->chip == BQ27010)
 853                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
 854         else
 855                 dcap *= 1000;
 856
 857         return dcap;
 858 }
 859
 860 /*
 861  * Return the battery Available energy in µWh
 862  * Or < 0 if something fails.
 863  */
 864 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
 865 {
 866         int ae;
 867
 868         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
 869         if (ae < 0) {
 870                 dev_dbg(di->dev, "error reading available energy\n");
 871                 return ae;
 872         }
 873
 874         if (di->chip == BQ27000 || di->chip == BQ27010)
 875                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
 876         else
 877                 ae *= 1000;
 878
 879         return ae;
 880 }
 881
 882 /*
 883  * Return the battery temperature in tenths of degree Kelvin
 884  * Or < 0 if something fails.
 885  */
 886 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
 887 {
 888         int temp;
 889
 890         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
 891         if (temp < 0) {
 892                 dev_err(di->dev, "error reading temperature\n");
 893                 return temp;
 894         }
 895
 896         if (di->chip == BQ27000 || di->chip == BQ27010)
 897                 temp = 5 * temp / 2;
 898
 899         return temp;
 900 }
 901
 902 /*
 903  * Return the battery Cycle count total
 904  * Or < 0 if something fails.
 905  */
 906 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
 907 {
 908         int cyct;
 909
 910         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
 911         if (cyct < 0)
 912                 dev_err(di->dev, "error reading cycle count total\n");
 913
 914         return cyct;
 915 }
 916
 917 /*
 918  * Read a time register.
 919  * Return < 0 if something fails.
 920  */
 921 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
 922 {
 923         int tval;
 924
 925         tval = bq27xxx_read(di, reg, false);
 926         if (tval < 0) {
 927                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
 928                         reg, tval);
 929                 return tval;
 930         }
 931
 932         if (tval == 65535)
 933                 return -ENODATA;
 934
 935         return tval * 60;
 936 }
 937
 938 /*
 939  * Read an average power register.
 940  * Return < 0 if something fails.
 941  */
 942 static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
 943 {
 944         int tval;
 945
 946         tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
 947         if (tval < 0) {
 948                 dev_err(di->dev, "error reading average power register  %02x: %d\n",
 949                         BQ27XXX_REG_AP, tval);
 950                 return tval;
 951         }
 952
 953         if (di->chip == BQ27000 || di->chip == BQ27010)
 954                 return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
 955         else
 956                 return tval;
 957 }
 958
 959 /*
 960  * Returns true if a battery over temperature condition is detected
 961  */
 962 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
 963 {
 964         switch (di->chip) {
 965         case BQ2750X:
 966         case BQ2751X:
 967         case BQ27500:
 968         case BQ27510G1:
 969         case BQ27510G2:
 970         case BQ27510G3:
 971         case BQ27520G1:
 972         case BQ27520G2:
 973         case BQ27520G3:
 974         case BQ27541:
 975         case BQ27545:
 976                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
 977         case BQ27530:
 978         case BQ27421:
 979                 return flags & BQ27XXX_FLAG_OT;
 980         default:
 981                 return false;
 982         }
 983 }
 984
 985 /*
 986  * Returns true if a battery under temperature condition is detected
 987  */
 988 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
 989 {
 990         if (di->chip == BQ27530 || di->chip == BQ27421)
 991                 return flags & BQ27XXX_FLAG_UT;
 992
 993         return false;
 994 }
 995
 996 /*
 997  * Returns true if a low state of charge condition is detected
 998  */
 999 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1000 {
1001         if (di->chip == BQ27000 || di->chip == BQ27010)
1002                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1003         else
1004                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1005 }
1006
1007 /*
1008  * Read flag register.
1009  * Return < 0 if something fails.
1010  */
1011 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1012 {
1013         int flags;
1014         bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
1015
1016         flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1017         if (flags < 0) {
1018                 dev_err(di->dev, "error reading flag register:%d\n", flags);
1019                 return flags;
1020         }
1021
1022         /* Unlikely but important to return first */
1023         if (unlikely(bq27xxx_battery_overtemp(di, flags)))
1024                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1025         if (unlikely(bq27xxx_battery_undertemp(di, flags)))
1026                 return POWER_SUPPLY_HEALTH_COLD;
1027         if (unlikely(bq27xxx_battery_dead(di, flags)))
1028                 return POWER_SUPPLY_HEALTH_DEAD;
1029
1030         return POWER_SUPPLY_HEALTH_GOOD;
1031 }
1032
1033 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1034 {
1035         struct bq27xxx_reg_cache cache = {0, };
1036         bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010;
1037         bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
1038
1039         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1040         if ((cache.flags & 0xff) == 0xff)
1041                 cache.flags = -1; /* read error */
1042         if (cache.flags >= 0) {
1043                 cache.temperature = bq27xxx_battery_read_temperature(di);
1044                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1045                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1046                         cache.capacity = -ENODATA;
1047                         cache.energy = -ENODATA;
1048                         cache.time_to_empty = -ENODATA;
1049                         cache.time_to_empty_avg = -ENODATA;
1050                         cache.time_to_full = -ENODATA;
1051                         cache.charge_full = -ENODATA;
1052                         cache.health = -ENODATA;
1053                 } else {
1054                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1055                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1056                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1057                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1058                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1059                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1060                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1061                         cache.capacity = bq27xxx_battery_read_soc(di);
1062                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1063                                 cache.energy = bq27xxx_battery_read_energy(di);
1064                         cache.health = bq27xxx_battery_read_health(di);
1065                 }
1066                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1067                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1068                 if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
1069                         cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
1070
1071                 /* We only have to read charge design full once */
1072                 if (di->charge_design_full <= 0)
1073                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1074         }
1075
1076         if (di->cache.capacity != cache.capacity)
1077                 power_supply_changed(di->bat);
1078
1079         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1080                 di->cache = cache;
1081
1082         di->last_update = jiffies;
1083 }
1084 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1085
1086 static void bq27xxx_battery_poll(struct work_struct *work)
1087 {
1088         struct bq27xxx_device_info *di =
1089                         container_of(work, struct bq27xxx_device_info,
1090                                      work.work);
1091
1092         bq27xxx_battery_update(di);
1093
1094         if (poll_interval > 0)
1095                 schedule_delayed_work(&di->work, poll_interval * HZ);
1096 }
1097
1098 /*
1099  * Return the battery average current in µA
1100  * Note that current can be negative signed as well
1101  * Or 0 if something fails.
1102  */
1103 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1104                                    union power_supply_propval *val)
1105 {
1106         int curr;
1107         int flags;
1108
1109         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1110         if (curr < 0) {
1111                 dev_err(di->dev, "error reading current\n");
1112                 return curr;
1113         }
1114
1115         if (di->chip == BQ27000 || di->chip == BQ27010) {
1116                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1117                 if (flags & BQ27000_FLAG_CHGS) {
1118                         dev_dbg(di->dev, "negative current!\n");
1119                         curr = -curr;
1120                 }
1121
1122                 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1123         } else {
1124                 /* Other gauges return signed value */
1125                 val->intval = (int)((s16)curr) * 1000;
1126         }
1127
1128         return 0;
1129 }
1130
1131 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1132                                   union power_supply_propval *val)
1133 {
1134         int status;
1135
1136         if (di->chip == BQ27000 || di->chip == BQ27010) {
1137                 if (di->cache.flags & BQ27000_FLAG_FC)
1138                         status = POWER_SUPPLY_STATUS_FULL;
1139                 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1140                         status = POWER_SUPPLY_STATUS_CHARGING;
1141                 else if (power_supply_am_i_supplied(di->bat))
1142                         status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1143                 else
1144                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1145         } else {
1146                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1147                         status = POWER_SUPPLY_STATUS_FULL;
1148                 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1149                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1150                 else
1151                         status = POWER_SUPPLY_STATUS_CHARGING;
1152         }
1153
1154         val->intval = status;
1155
1156         return 0;
1157 }
1158
1159 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1160                                           union power_supply_propval *val)
1161 {
1162         int level;
1163
1164         if (di->chip == BQ27000 || di->chip == BQ27010) {
1165                 if (di->cache.flags & BQ27000_FLAG_FC)
1166                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1167                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1168                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1169                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1170                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1171                 else
1172                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1173         } else {
1174                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1175                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1176                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1177                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1178                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1179                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1180                 else
1181                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1182         }
1183
1184         val->intval = level;
1185
1186         return 0;
1187 }
1188
1189 /*
1190  * Return the battery Voltage in millivolts
1191  * Or < 0 if something fails.
1192  */
1193 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1194                                    union power_supply_propval *val)
1195 {
1196         int volt;
1197
1198         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1199         if (volt < 0) {
1200                 dev_err(di->dev, "error reading voltage\n");
1201                 return volt;
1202         }
1203
1204         val->intval = volt * 1000;
1205
1206         return 0;
1207 }
1208
1209 static int bq27xxx_simple_value(int value,
1210                                 union power_supply_propval *val)
1211 {
1212         if (value < 0)
1213                 return value;
1214
1215         val->intval = value;
1216
1217         return 0;
1218 }
1219
1220 static int bq27xxx_battery_get_property(struct power_supply *psy,
1221                                         enum power_supply_property psp,
1222                                         union power_supply_propval *val)
1223 {
1224         int ret = 0;
1225         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1226
1227         mutex_lock(&di->lock);
1228         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1229                 cancel_delayed_work_sync(&di->work);
1230                 bq27xxx_battery_poll(&di->work.work);
1231         }
1232         mutex_unlock(&di->lock);
1233
1234         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1235                 return -ENODEV;
1236
1237         switch (psp) {
1238         case POWER_SUPPLY_PROP_STATUS:
1239                 ret = bq27xxx_battery_status(di, val);
1240                 break;
1241         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1242                 ret = bq27xxx_battery_voltage(di, val);
1243                 break;
1244         case POWER_SUPPLY_PROP_PRESENT:
1245                 val->intval = di->cache.flags < 0 ? 0 : 1;
1246                 break;
1247         case POWER_SUPPLY_PROP_CURRENT_NOW:
1248                 ret = bq27xxx_battery_current(di, val);
1249                 break;
1250         case POWER_SUPPLY_PROP_CAPACITY:
1251                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1252                 break;
1253         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1254                 ret = bq27xxx_battery_capacity_level(di, val);
1255                 break;
1256         case POWER_SUPPLY_PROP_TEMP:
1257                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1258                 if (ret == 0)
1259                         val->intval -= 2731; /* convert decidegree k to c */
1260                 break;
1261         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1262                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1263                 break;
1264         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1265                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1266                 break;
1267         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1268                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1269                 break;
1270         case POWER_SUPPLY_PROP_TECHNOLOGY:
1271                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1272                 break;
1273         case POWER_SUPPLY_PROP_CHARGE_NOW:
1274                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1275                 break;
1276         case POWER_SUPPLY_PROP_CHARGE_FULL:
1277                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1278                 break;
1279         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1280                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1281                 break;
1282         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1283                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1284                 break;
1285         case POWER_SUPPLY_PROP_ENERGY_NOW:
1286                 ret = bq27xxx_simple_value(di->cache.energy, val);
1287                 break;
1288         case POWER_SUPPLY_PROP_POWER_AVG:
1289                 ret = bq27xxx_simple_value(di->cache.power_avg, val);
1290                 break;
1291         case POWER_SUPPLY_PROP_HEALTH:
1292                 ret = bq27xxx_simple_value(di->cache.health, val);
1293                 break;
1294         case POWER_SUPPLY_PROP_MANUFACTURER:
1295                 val->strval = BQ27XXX_MANUFACTURER;
1296                 break;
1297         default:
1298                 return -EINVAL;
1299         }
1300
1301         return ret;
1302 }
1303
1304 static void bq27xxx_external_power_changed(struct power_supply *psy)
1305 {
1306         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1307
1308         cancel_delayed_work_sync(&di->work);
1309         schedule_delayed_work(&di->work, 0);
1310 }
1311
1312 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1313 {
1314         struct power_supply_desc *psy_desc;
1315         struct power_supply_config psy_cfg = { .drv_data = di, };
1316
1317         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1318         mutex_init(&di->lock);
1319         di->regs = bq27xxx_regs[di->chip];
1320
1321         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1322         if (!psy_desc)
1323                 return -ENOMEM;
1324
1325         psy_desc->name = di->name;
1326         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1327         psy_desc->properties = bq27xxx_battery_props[di->chip].props;
1328         psy_desc->num_properties = bq27xxx_battery_props[di->chip].size;
1329         psy_desc->get_property = bq27xxx_battery_get_property;
1330         psy_desc->external_power_changed = bq27xxx_external_power_changed;
1331
1332         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1333         if (IS_ERR(di->bat)) {
1334                 dev_err(di->dev, "failed to register battery\n");
1335                 return PTR_ERR(di->bat);
1336         }
1337
1338         dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
1339
1340         bq27xxx_battery_update(di);
1341
1342         mutex_lock(&bq27xxx_list_lock);
1343         list_add(&di->list, &bq27xxx_battery_devices);
1344         mutex_unlock(&bq27xxx_list_lock);
1345
1346         return 0;
1347 }
1348 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1349
1350 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1351 {
1352         /*
1353          * power_supply_unregister call bq27xxx_battery_get_property which
1354          * call bq27xxx_battery_poll.
1355          * Make sure that bq27xxx_battery_poll will not call
1356          * schedule_delayed_work again after unregister (which cause OOPS).
1357          */
1358         poll_interval = 0;
1359
1360         cancel_delayed_work_sync(&di->work);
1361
1362         power_supply_unregister(di->bat);
1363
1364         mutex_lock(&bq27xxx_list_lock);
1365         list_del(&di->list);
1366         mutex_unlock(&bq27xxx_list_lock);
1367
1368         mutex_destroy(&di->lock);
1369 }
1370 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1371
1372 static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg,
1373                                          bool single)
1374 {
1375         struct device *dev = di->dev;
1376         struct bq27xxx_platform_data *pdata = dev->platform_data;
1377         unsigned int timeout = 3;
1378         int upper, lower;
1379         int temp;
1380
1381         if (!single) {
1382                 /* Make sure the value has not changed in between reading the
1383                  * lower and the upper part */
1384                 upper = pdata->read(dev, reg + 1);
1385                 do {
1386                         temp = upper;
1387                         if (upper < 0)
1388                                 return upper;
1389
1390                         lower = pdata->read(dev, reg);
1391                         if (lower < 0)
1392                                 return lower;
1393
1394                         upper = pdata->read(dev, reg + 1);
1395                 } while (temp != upper && --timeout);
1396
1397                 if (timeout == 0)
1398                         return -EIO;
1399
1400                 return (upper << 8) | lower;
1401         }
1402
1403         return pdata->read(dev, reg);
1404 }
1405
1406 static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
1407 {
1408         struct bq27xxx_device_info *di;
1409         struct bq27xxx_platform_data *pdata = pdev->dev.platform_data;
1410
1411         if (!pdata) {
1412                 dev_err(&pdev->dev, "no platform_data supplied\n");
1413                 return -EINVAL;
1414         }
1415
1416         if (!pdata->read) {
1417                 dev_err(&pdev->dev, "no hdq read callback supplied\n");
1418                 return -EINVAL;
1419         }
1420
1421         if (!pdata->chip) {
1422                 dev_err(&pdev->dev, "no device supplied\n");
1423                 return -EINVAL;
1424         }
1425
1426         di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
1427         if (!di)
1428                 return -ENOMEM;
1429
1430         platform_set_drvdata(pdev, di);
1431
1432         di->dev = &pdev->dev;
1433         di->chip = pdata->chip;
1434         di->name = pdata->name ?: dev_name(&pdev->dev);
1435         di->bus.read = bq27xxx_battery_platform_read;
1436
1437         return bq27xxx_battery_setup(di);
1438 }
1439
1440 static int bq27xxx_battery_platform_remove(struct platform_device *pdev)
1441 {
1442         struct bq27xxx_device_info *di = platform_get_drvdata(pdev);
1443
1444         bq27xxx_battery_teardown(di);
1445
1446         return 0;
1447 }
1448
1449 static const struct platform_device_id bq27xxx_battery_platform_id_table[] = {
1450         { "bq27000-battery", },
1451         { /* sentinel */ }
1452 };
1453 MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table);
1454
1455 #ifdef CONFIG_OF
1456 static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = {
1457         { .compatible = "ti,bq27000" },
1458         {},
1459 };
1460 MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table);
1461 #endif
1462
1463 static struct platform_driver bq27xxx_battery_platform_driver = {
1464         .probe  = bq27xxx_battery_platform_probe,
1465         .remove = bq27xxx_battery_platform_remove,
1466         .driver = {
1467                 .name = "bq27000-battery",
1468                 .of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table),
1469         },
1470         .id_table = bq27xxx_battery_platform_id_table,
1471 };
1472 module_platform_driver(bq27xxx_battery_platform_driver);
1473
1474 MODULE_ALIAS("platform:bq27000-battery");
1475
1476 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1477 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
1478 MODULE_LICENSE("GPL");