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  * Copyright (C) 2017 Liam Breck <kernel@networkimprov.net>
   9  *
  10  * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
  11  *
  12  * This package is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  *
  16  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  18  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  19  *
  20  * Datasheets:
  21  * http://www.ti.com/product/bq27000
  22  * http://www.ti.com/product/bq27200
  23  * http://www.ti.com/product/bq27010
  24  * http://www.ti.com/product/bq27210
  25  * http://www.ti.com/product/bq27500
  26  * http://www.ti.com/product/bq27510-g1
  27  * http://www.ti.com/product/bq27510-g2
  28  * http://www.ti.com/product/bq27510-g3
  29  * http://www.ti.com/product/bq27520-g4
  30  * http://www.ti.com/product/bq27520-g1
  31  * http://www.ti.com/product/bq27520-g2
  32  * http://www.ti.com/product/bq27520-g3
  33  * http://www.ti.com/product/bq27520-g4
  34  * http://www.ti.com/product/bq27530-g1
  35  * http://www.ti.com/product/bq27531-g1
  36  * http://www.ti.com/product/bq27541-g1
  37  * http://www.ti.com/product/bq27542-g1
  38  * http://www.ti.com/product/bq27546-g1
  39  * http://www.ti.com/product/bq27742-g1
  40  * http://www.ti.com/product/bq27545-g1
  41  * http://www.ti.com/product/bq27421-g1
  42  * http://www.ti.com/product/bq27425-g1
  43  * http://www.ti.com/product/bq27411-g1
  44  * http://www.ti.com/product/bq27621-g1
  45  */
  46
  47 #include <linux/device.h>
  48 #include <linux/module.h>
  49 #include <linux/mutex.h>
  50 #include <linux/param.h>
  51 #include <linux/jiffies.h>
  52 #include <linux/workqueue.h>
  53 #include <linux/delay.h>
  54 #include <linux/platform_device.h>
  55 #include <linux/power_supply.h>
  56 #include <linux/slab.h>
  57 #include <linux/of.h>
  58
  59 #include <linux/power/bq27xxx_battery.h>
  60
  61 #define DRIVER_VERSION          "1.2.0"
  62
  63 #define BQ27XXX_MANUFACTURER    "Texas Instruments"
  64
  65 /* BQ27XXX Flags */
  66 #define BQ27XXX_FLAG_DSC        BIT(0)
  67 #define BQ27XXX_FLAG_SOCF       BIT(1) /* State-of-Charge threshold final */
  68 #define BQ27XXX_FLAG_SOC1       BIT(2) /* State-of-Charge threshold 1 */
  69 #define BQ27XXX_FLAG_CFGUP      BIT(4)
  70 #define BQ27XXX_FLAG_FC         BIT(9)
  71 #define BQ27XXX_FLAG_OTD        BIT(14)
  72 #define BQ27XXX_FLAG_OTC        BIT(15)
  73 #define BQ27XXX_FLAG_UT         BIT(14)
  74 #define BQ27XXX_FLAG_OT         BIT(15)
  75
  76 /* BQ27000 has different layout for Flags register */
  77 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  78 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  79 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  80 #define BQ27000_FLAG_FC         BIT(5)
  81 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  82
  83 /* control register params */
  84 #define BQ27XXX_SEALED                  0x20
  85 #define BQ27XXX_SET_CFGUPDATE           0x13
  86 #define BQ27XXX_SOFT_RESET              0x42
  87 #define BQ27XXX_RESET                   0x41
  88
  89 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  90 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  91 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  92
  93 #define INVALID_REG_ADDR        0xff
  94
  95 /*
  96  * bq27xxx_reg_index - Register names
  97  *
  98  * These are indexes into a device's register mapping array.
  99  */
 100
 101 enum bq27xxx_reg_index {
 102         BQ27XXX_REG_CTRL = 0,   /* Control */
 103         BQ27XXX_REG_TEMP,       /* Temperature */
 104         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
 105         BQ27XXX_REG_VOLT,       /* Voltage */
 106         BQ27XXX_REG_AI,         /* Average Current */
 107         BQ27XXX_REG_FLAGS,      /* Flags */
 108         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 109         BQ27XXX_REG_TTF,        /* Time-to-Full */
 110         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 111         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 112         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 113         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 114         BQ27XXX_REG_CYCT,       /* Cycle Count */
 115         BQ27XXX_REG_AE,         /* Available Energy */
 116         BQ27XXX_REG_SOC,        /* State-of-Charge */
 117         BQ27XXX_REG_DCAP,       /* Design Capacity */
 118         BQ27XXX_REG_AP,         /* Average Power */
 119         BQ27XXX_DM_CTRL,        /* Block Data Control */
 120         BQ27XXX_DM_CLASS,       /* Data Class */
 121         BQ27XXX_DM_BLOCK,       /* Data Block */
 122         BQ27XXX_DM_DATA,        /* Block Data */
 123         BQ27XXX_DM_CKSUM,       /* Block Data Checksum */
 124         BQ27XXX_REG_MAX,        /* sentinel */
 125 };
 126
 127 #define BQ27XXX_DM_REG_ROWS \
 128         [BQ27XXX_DM_CTRL] = 0x61,  \
 129         [BQ27XXX_DM_CLASS] = 0x3e, \
 130         [BQ27XXX_DM_BLOCK] = 0x3f, \
 131         [BQ27XXX_DM_DATA] = 0x40,  \
 132         [BQ27XXX_DM_CKSUM] = 0x60
 133
 134 /* Register mappings */
 135 static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
 136         [BQ27000] = {
 137                 [BQ27XXX_REG_CTRL] = 0x00,
 138                 [BQ27XXX_REG_TEMP] = 0x06,
 139                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 140                 [BQ27XXX_REG_VOLT] = 0x08,
 141                 [BQ27XXX_REG_AI] = 0x14,
 142                 [BQ27XXX_REG_FLAGS] = 0x0a,
 143                 [BQ27XXX_REG_TTE] = 0x16,
 144                 [BQ27XXX_REG_TTF] = 0x18,
 145                 [BQ27XXX_REG_TTES] = 0x1c,
 146                 [BQ27XXX_REG_TTECP] = 0x26,
 147                 [BQ27XXX_REG_NAC] = 0x0c,
 148                 [BQ27XXX_REG_FCC] = 0x12,
 149                 [BQ27XXX_REG_CYCT] = 0x2a,
 150                 [BQ27XXX_REG_AE] = 0x22,
 151                 [BQ27XXX_REG_SOC] = 0x0b,
 152                 [BQ27XXX_REG_DCAP] = 0x76,
 153                 [BQ27XXX_REG_AP] = 0x24,
 154                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 155                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 156                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 157                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 158                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 159         },
 160         [BQ27010] = {
 161                 [BQ27XXX_REG_CTRL] = 0x00,
 162                 [BQ27XXX_REG_TEMP] = 0x06,
 163                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 164                 [BQ27XXX_REG_VOLT] = 0x08,
 165                 [BQ27XXX_REG_AI] = 0x14,
 166                 [BQ27XXX_REG_FLAGS] = 0x0a,
 167                 [BQ27XXX_REG_TTE] = 0x16,
 168                 [BQ27XXX_REG_TTF] = 0x18,
 169                 [BQ27XXX_REG_TTES] = 0x1c,
 170                 [BQ27XXX_REG_TTECP] = 0x26,
 171                 [BQ27XXX_REG_NAC] = 0x0c,
 172                 [BQ27XXX_REG_FCC] = 0x12,
 173                 [BQ27XXX_REG_CYCT] = 0x2a,
 174                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 175                 [BQ27XXX_REG_SOC] = 0x0b,
 176                 [BQ27XXX_REG_DCAP] = 0x76,
 177                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 178                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 179                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 180                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 181                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 182                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 183         },
 184         [BQ2750X] = {
 185                 [BQ27XXX_REG_CTRL] = 0x00,
 186                 [BQ27XXX_REG_TEMP] = 0x06,
 187                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 188                 [BQ27XXX_REG_VOLT] = 0x08,
 189                 [BQ27XXX_REG_AI] = 0x14,
 190                 [BQ27XXX_REG_FLAGS] = 0x0a,
 191                 [BQ27XXX_REG_TTE] = 0x16,
 192                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 193                 [BQ27XXX_REG_TTES] = 0x1a,
 194                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 195                 [BQ27XXX_REG_NAC] = 0x0c,
 196                 [BQ27XXX_REG_FCC] = 0x12,
 197                 [BQ27XXX_REG_CYCT] = 0x2a,
 198                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 199                 [BQ27XXX_REG_SOC] = 0x2c,
 200                 [BQ27XXX_REG_DCAP] = 0x3c,
 201                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 202                 BQ27XXX_DM_REG_ROWS,
 203         },
 204         [BQ2751X] = {
 205                 [BQ27XXX_REG_CTRL] = 0x00,
 206                 [BQ27XXX_REG_TEMP] = 0x06,
 207                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 208                 [BQ27XXX_REG_VOLT] = 0x08,
 209                 [BQ27XXX_REG_AI] = 0x14,
 210                 [BQ27XXX_REG_FLAGS] = 0x0a,
 211                 [BQ27XXX_REG_TTE] = 0x16,
 212                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 213                 [BQ27XXX_REG_TTES] = 0x1a,
 214                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 215                 [BQ27XXX_REG_NAC] = 0x0c,
 216                 [BQ27XXX_REG_FCC] = 0x12,
 217                 [BQ27XXX_REG_CYCT] = 0x1e,
 218                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 219                 [BQ27XXX_REG_SOC] = 0x20,
 220                 [BQ27XXX_REG_DCAP] = 0x2e,
 221                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 222                 BQ27XXX_DM_REG_ROWS,
 223         },
 224         [BQ27500] = {
 225                 [BQ27XXX_REG_CTRL] = 0x00,
 226                 [BQ27XXX_REG_TEMP] = 0x06,
 227                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 228                 [BQ27XXX_REG_VOLT] = 0x08,
 229                 [BQ27XXX_REG_AI] = 0x14,
 230                 [BQ27XXX_REG_FLAGS] = 0x0a,
 231                 [BQ27XXX_REG_TTE] = 0x16,
 232                 [BQ27XXX_REG_TTF] = 0x18,
 233                 [BQ27XXX_REG_TTES] = 0x1c,
 234                 [BQ27XXX_REG_TTECP] = 0x26,
 235                 [BQ27XXX_REG_NAC] = 0x0c,
 236                 [BQ27XXX_REG_FCC] = 0x12,
 237                 [BQ27XXX_REG_CYCT] = 0x2a,
 238                 [BQ27XXX_REG_AE] = 0x22,
 239                 [BQ27XXX_REG_SOC] = 0x2c,
 240                 [BQ27XXX_REG_DCAP] = 0x3c,
 241                 [BQ27XXX_REG_AP] = 0x24,
 242                 BQ27XXX_DM_REG_ROWS,
 243         },
 244         [BQ27510G1] = {
 245                 [BQ27XXX_REG_CTRL] = 0x00,
 246                 [BQ27XXX_REG_TEMP] = 0x06,
 247                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 248                 [BQ27XXX_REG_VOLT] = 0x08,
 249                 [BQ27XXX_REG_AI] = 0x14,
 250                 [BQ27XXX_REG_FLAGS] = 0x0a,
 251                 [BQ27XXX_REG_TTE] = 0x16,
 252                 [BQ27XXX_REG_TTF] = 0x18,
 253                 [BQ27XXX_REG_TTES] = 0x1c,
 254                 [BQ27XXX_REG_TTECP] = 0x26,
 255                 [BQ27XXX_REG_NAC] = 0x0c,
 256                 [BQ27XXX_REG_FCC] = 0x12,
 257                 [BQ27XXX_REG_CYCT] = 0x2a,
 258                 [BQ27XXX_REG_AE] = 0x22,
 259                 [BQ27XXX_REG_SOC] = 0x2c,
 260                 [BQ27XXX_REG_DCAP] = 0x3c,
 261                 [BQ27XXX_REG_AP] = 0x24,
 262                 BQ27XXX_DM_REG_ROWS,
 263         },
 264         [BQ27510G2] = {
 265                 [BQ27XXX_REG_CTRL] = 0x00,
 266                 [BQ27XXX_REG_TEMP] = 0x06,
 267                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 268                 [BQ27XXX_REG_VOLT] = 0x08,
 269                 [BQ27XXX_REG_AI] = 0x14,
 270                 [BQ27XXX_REG_FLAGS] = 0x0a,
 271                 [BQ27XXX_REG_TTE] = 0x16,
 272                 [BQ27XXX_REG_TTF] = 0x18,
 273                 [BQ27XXX_REG_TTES] = 0x1c,
 274                 [BQ27XXX_REG_TTECP] = 0x26,
 275                 [BQ27XXX_REG_NAC] = 0x0c,
 276                 [BQ27XXX_REG_FCC] = 0x12,
 277                 [BQ27XXX_REG_CYCT] = 0x2a,
 278                 [BQ27XXX_REG_AE] = 0x22,
 279                 [BQ27XXX_REG_SOC] = 0x2c,
 280                 [BQ27XXX_REG_DCAP] = 0x3c,
 281                 [BQ27XXX_REG_AP] = 0x24,
 282                 BQ27XXX_DM_REG_ROWS,
 283         },
 284         [BQ27510G3] = {
 285                 [BQ27XXX_REG_CTRL] = 0x00,
 286                 [BQ27XXX_REG_TEMP] = 0x06,
 287                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 288                 [BQ27XXX_REG_VOLT] = 0x08,
 289                 [BQ27XXX_REG_AI] = 0x14,
 290                 [BQ27XXX_REG_FLAGS] = 0x0a,
 291                 [BQ27XXX_REG_TTE] = 0x16,
 292                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 293                 [BQ27XXX_REG_TTES] = 0x1a,
 294                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 295                 [BQ27XXX_REG_NAC] = 0x0c,
 296                 [BQ27XXX_REG_FCC] = 0x12,
 297                 [BQ27XXX_REG_CYCT] = 0x1e,
 298                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 299                 [BQ27XXX_REG_SOC] = 0x20,
 300                 [BQ27XXX_REG_DCAP] = 0x2e,
 301                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 302                 BQ27XXX_DM_REG_ROWS,
 303         },
 304         [BQ27520G1] = {
 305                 [BQ27XXX_REG_CTRL] = 0x00,
 306                 [BQ27XXX_REG_TEMP] = 0x06,
 307                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 308                 [BQ27XXX_REG_VOLT] = 0x08,
 309                 [BQ27XXX_REG_AI] = 0x14,
 310                 [BQ27XXX_REG_FLAGS] = 0x0a,
 311                 [BQ27XXX_REG_TTE] = 0x16,
 312                 [BQ27XXX_REG_TTF] = 0x18,
 313                 [BQ27XXX_REG_TTES] = 0x1c,
 314                 [BQ27XXX_REG_TTECP] = 0x26,
 315                 [BQ27XXX_REG_NAC] = 0x0c,
 316                 [BQ27XXX_REG_FCC] = 0x12,
 317                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 318                 [BQ27XXX_REG_AE] = 0x22,
 319                 [BQ27XXX_REG_SOC] = 0x2c,
 320                 [BQ27XXX_REG_DCAP] = 0x3c,
 321                 [BQ27XXX_REG_AP] = 0x24,
 322                 BQ27XXX_DM_REG_ROWS,
 323         },
 324         [BQ27520G2] = {
 325                 [BQ27XXX_REG_CTRL] = 0x00,
 326                 [BQ27XXX_REG_TEMP] = 0x06,
 327                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 328                 [BQ27XXX_REG_VOLT] = 0x08,
 329                 [BQ27XXX_REG_AI] = 0x14,
 330                 [BQ27XXX_REG_FLAGS] = 0x0a,
 331                 [BQ27XXX_REG_TTE] = 0x16,
 332                 [BQ27XXX_REG_TTF] = 0x18,
 333                 [BQ27XXX_REG_TTES] = 0x1c,
 334                 [BQ27XXX_REG_TTECP] = 0x26,
 335                 [BQ27XXX_REG_NAC] = 0x0c,
 336                 [BQ27XXX_REG_FCC] = 0x12,
 337                 [BQ27XXX_REG_CYCT] = 0x2a,
 338                 [BQ27XXX_REG_AE] = 0x22,
 339                 [BQ27XXX_REG_SOC] = 0x2c,
 340                 [BQ27XXX_REG_DCAP] = 0x3c,
 341                 [BQ27XXX_REG_AP] = 0x24,
 342                 BQ27XXX_DM_REG_ROWS,
 343         },
 344         [BQ27520G3] = {
 345                 [BQ27XXX_REG_CTRL] = 0x00,
 346                 [BQ27XXX_REG_TEMP] = 0x06,
 347                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 348                 [BQ27XXX_REG_VOLT] = 0x08,
 349                 [BQ27XXX_REG_AI] = 0x14,
 350                 [BQ27XXX_REG_FLAGS] = 0x0a,
 351                 [BQ27XXX_REG_TTE] = 0x16,
 352                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 353                 [BQ27XXX_REG_TTES] = 0x1c,
 354                 [BQ27XXX_REG_TTECP] = 0x26,
 355                 [BQ27XXX_REG_NAC] = 0x0c,
 356                 [BQ27XXX_REG_FCC] = 0x12,
 357                 [BQ27XXX_REG_CYCT] = 0x2a,
 358                 [BQ27XXX_REG_AE] = 0x22,
 359                 [BQ27XXX_REG_SOC] = 0x2c,
 360                 [BQ27XXX_REG_DCAP] = 0x3c,
 361                 [BQ27XXX_REG_AP] = 0x24,
 362                 BQ27XXX_DM_REG_ROWS,
 363         },
 364         [BQ27520G4] = {
 365                 [BQ27XXX_REG_CTRL] = 0x00,
 366                 [BQ27XXX_REG_TEMP] = 0x06,
 367                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 368                 [BQ27XXX_REG_VOLT] = 0x08,
 369                 [BQ27XXX_REG_AI] = 0x14,
 370                 [BQ27XXX_REG_FLAGS] = 0x0a,
 371                 [BQ27XXX_REG_TTE] = 0x16,
 372                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 373                 [BQ27XXX_REG_TTES] = 0x1c,
 374                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 375                 [BQ27XXX_REG_NAC] = 0x0c,
 376                 [BQ27XXX_REG_FCC] = 0x12,
 377                 [BQ27XXX_REG_CYCT] = 0x1e,
 378                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 379                 [BQ27XXX_REG_SOC] = 0x20,
 380                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 381                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 382                 BQ27XXX_DM_REG_ROWS,
 383         },
 384         [BQ27530] = {
 385                 [BQ27XXX_REG_CTRL] = 0x00,
 386                 [BQ27XXX_REG_TEMP] = 0x06,
 387                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 388                 [BQ27XXX_REG_VOLT] = 0x08,
 389                 [BQ27XXX_REG_AI] = 0x14,
 390                 [BQ27XXX_REG_FLAGS] = 0x0a,
 391                 [BQ27XXX_REG_TTE] = 0x16,
 392                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 393                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 394                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 395                 [BQ27XXX_REG_NAC] = 0x0c,
 396                 [BQ27XXX_REG_FCC] = 0x12,
 397                 [BQ27XXX_REG_CYCT] = 0x2a,
 398                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 399                 [BQ27XXX_REG_SOC] = 0x2c,
 400                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 401                 [BQ27XXX_REG_AP] = 0x24,
 402                 BQ27XXX_DM_REG_ROWS,
 403         },
 404         [BQ27541] = {
 405                 [BQ27XXX_REG_CTRL] = 0x00,
 406                 [BQ27XXX_REG_TEMP] = 0x06,
 407                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 408                 [BQ27XXX_REG_VOLT] = 0x08,
 409                 [BQ27XXX_REG_AI] = 0x14,
 410                 [BQ27XXX_REG_FLAGS] = 0x0a,
 411                 [BQ27XXX_REG_TTE] = 0x16,
 412                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 413                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 414                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 415                 [BQ27XXX_REG_NAC] = 0x0c,
 416                 [BQ27XXX_REG_FCC] = 0x12,
 417                 [BQ27XXX_REG_CYCT] = 0x2a,
 418                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 419                 [BQ27XXX_REG_SOC] = 0x2c,
 420                 [BQ27XXX_REG_DCAP] = 0x3c,
 421                 [BQ27XXX_REG_AP] = 0x24,
 422                 BQ27XXX_DM_REG_ROWS,
 423         },
 424         [BQ27545] = {
 425                 [BQ27XXX_REG_CTRL] = 0x00,
 426                 [BQ27XXX_REG_TEMP] = 0x06,
 427                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 428                 [BQ27XXX_REG_VOLT] = 0x08,
 429                 [BQ27XXX_REG_AI] = 0x14,
 430                 [BQ27XXX_REG_FLAGS] = 0x0a,
 431                 [BQ27XXX_REG_TTE] = 0x16,
 432                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 433                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 434                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 435                 [BQ27XXX_REG_NAC] = 0x0c,
 436                 [BQ27XXX_REG_FCC] = 0x12,
 437                 [BQ27XXX_REG_CYCT] = 0x2a,
 438                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 439                 [BQ27XXX_REG_SOC] = 0x2c,
 440                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 441                 [BQ27XXX_REG_AP] = 0x24,
 442                 BQ27XXX_DM_REG_ROWS,
 443         },
 444         [BQ27421] = {
 445                 [BQ27XXX_REG_CTRL] = 0x00,
 446                 [BQ27XXX_REG_TEMP] = 0x02,
 447                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 448                 [BQ27XXX_REG_VOLT] = 0x04,
 449                 [BQ27XXX_REG_AI] = 0x10,
 450                 [BQ27XXX_REG_FLAGS] = 0x06,
 451                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 452                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 453                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 454                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 455                 [BQ27XXX_REG_NAC] = 0x08,
 456                 [BQ27XXX_REG_FCC] = 0x0e,
 457                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 458                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 459                 [BQ27XXX_REG_SOC] = 0x1c,
 460                 [BQ27XXX_REG_DCAP] = 0x3c,
 461                 [BQ27XXX_REG_AP] = 0x18,
 462                 BQ27XXX_DM_REG_ROWS,
 463         },
 464 };
 465
 466 static enum power_supply_property bq27000_battery_props[] = {
 467         POWER_SUPPLY_PROP_STATUS,
 468         POWER_SUPPLY_PROP_PRESENT,
 469         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 470         POWER_SUPPLY_PROP_CURRENT_NOW,
 471         POWER_SUPPLY_PROP_CAPACITY,
 472         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 473         POWER_SUPPLY_PROP_TEMP,
 474         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 475         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 476         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 477         POWER_SUPPLY_PROP_TECHNOLOGY,
 478         POWER_SUPPLY_PROP_CHARGE_FULL,
 479         POWER_SUPPLY_PROP_CHARGE_NOW,
 480         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 481         POWER_SUPPLY_PROP_CYCLE_COUNT,
 482         POWER_SUPPLY_PROP_ENERGY_NOW,
 483         POWER_SUPPLY_PROP_POWER_AVG,
 484         POWER_SUPPLY_PROP_HEALTH,
 485         POWER_SUPPLY_PROP_MANUFACTURER,
 486 };
 487
 488 static enum power_supply_property bq27010_battery_props[] = {
 489         POWER_SUPPLY_PROP_STATUS,
 490         POWER_SUPPLY_PROP_PRESENT,
 491         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 492         POWER_SUPPLY_PROP_CURRENT_NOW,
 493         POWER_SUPPLY_PROP_CAPACITY,
 494         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 495         POWER_SUPPLY_PROP_TEMP,
 496         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 497         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 498         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 499         POWER_SUPPLY_PROP_TECHNOLOGY,
 500         POWER_SUPPLY_PROP_CHARGE_FULL,
 501         POWER_SUPPLY_PROP_CHARGE_NOW,
 502         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 503         POWER_SUPPLY_PROP_CYCLE_COUNT,
 504         POWER_SUPPLY_PROP_HEALTH,
 505         POWER_SUPPLY_PROP_MANUFACTURER,
 506 };
 507
 508 static enum power_supply_property bq2750x_battery_props[] = {
 509         POWER_SUPPLY_PROP_STATUS,
 510         POWER_SUPPLY_PROP_PRESENT,
 511         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 512         POWER_SUPPLY_PROP_CURRENT_NOW,
 513         POWER_SUPPLY_PROP_CAPACITY,
 514         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 515         POWER_SUPPLY_PROP_TEMP,
 516         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 517         POWER_SUPPLY_PROP_TECHNOLOGY,
 518         POWER_SUPPLY_PROP_CHARGE_FULL,
 519         POWER_SUPPLY_PROP_CHARGE_NOW,
 520         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 521         POWER_SUPPLY_PROP_CYCLE_COUNT,
 522         POWER_SUPPLY_PROP_HEALTH,
 523         POWER_SUPPLY_PROP_MANUFACTURER,
 524 };
 525
 526 static enum power_supply_property bq2751x_battery_props[] = {
 527         POWER_SUPPLY_PROP_STATUS,
 528         POWER_SUPPLY_PROP_PRESENT,
 529         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 530         POWER_SUPPLY_PROP_CURRENT_NOW,
 531         POWER_SUPPLY_PROP_CAPACITY,
 532         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 533         POWER_SUPPLY_PROP_TEMP,
 534         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 535         POWER_SUPPLY_PROP_TECHNOLOGY,
 536         POWER_SUPPLY_PROP_CHARGE_FULL,
 537         POWER_SUPPLY_PROP_CHARGE_NOW,
 538         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 539         POWER_SUPPLY_PROP_CYCLE_COUNT,
 540         POWER_SUPPLY_PROP_HEALTH,
 541         POWER_SUPPLY_PROP_MANUFACTURER,
 542 };
 543
 544 static enum power_supply_property bq27500_battery_props[] = {
 545         POWER_SUPPLY_PROP_STATUS,
 546         POWER_SUPPLY_PROP_PRESENT,
 547         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 548         POWER_SUPPLY_PROP_CURRENT_NOW,
 549         POWER_SUPPLY_PROP_CAPACITY,
 550         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 551         POWER_SUPPLY_PROP_TEMP,
 552         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 553         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 554         POWER_SUPPLY_PROP_TECHNOLOGY,
 555         POWER_SUPPLY_PROP_CHARGE_FULL,
 556         POWER_SUPPLY_PROP_CHARGE_NOW,
 557         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 558         POWER_SUPPLY_PROP_CYCLE_COUNT,
 559         POWER_SUPPLY_PROP_ENERGY_NOW,
 560         POWER_SUPPLY_PROP_POWER_AVG,
 561         POWER_SUPPLY_PROP_HEALTH,
 562         POWER_SUPPLY_PROP_MANUFACTURER,
 563 };
 564
 565 static enum power_supply_property bq27510g1_battery_props[] = {
 566         POWER_SUPPLY_PROP_STATUS,
 567         POWER_SUPPLY_PROP_PRESENT,
 568         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 569         POWER_SUPPLY_PROP_CURRENT_NOW,
 570         POWER_SUPPLY_PROP_CAPACITY,
 571         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 572         POWER_SUPPLY_PROP_TEMP,
 573         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 574         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 575         POWER_SUPPLY_PROP_TECHNOLOGY,
 576         POWER_SUPPLY_PROP_CHARGE_FULL,
 577         POWER_SUPPLY_PROP_CHARGE_NOW,
 578         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 579         POWER_SUPPLY_PROP_CYCLE_COUNT,
 580         POWER_SUPPLY_PROP_ENERGY_NOW,
 581         POWER_SUPPLY_PROP_POWER_AVG,
 582         POWER_SUPPLY_PROP_HEALTH,
 583         POWER_SUPPLY_PROP_MANUFACTURER,
 584 };
 585
 586 static enum power_supply_property bq27510g2_battery_props[] = {
 587         POWER_SUPPLY_PROP_STATUS,
 588         POWER_SUPPLY_PROP_PRESENT,
 589         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 590         POWER_SUPPLY_PROP_CURRENT_NOW,
 591         POWER_SUPPLY_PROP_CAPACITY,
 592         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 593         POWER_SUPPLY_PROP_TEMP,
 594         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 595         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 596         POWER_SUPPLY_PROP_TECHNOLOGY,
 597         POWER_SUPPLY_PROP_CHARGE_FULL,
 598         POWER_SUPPLY_PROP_CHARGE_NOW,
 599         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 600         POWER_SUPPLY_PROP_CYCLE_COUNT,
 601         POWER_SUPPLY_PROP_ENERGY_NOW,
 602         POWER_SUPPLY_PROP_POWER_AVG,
 603         POWER_SUPPLY_PROP_HEALTH,
 604         POWER_SUPPLY_PROP_MANUFACTURER,
 605 };
 606
 607 static enum power_supply_property bq27510g3_battery_props[] = {
 608         POWER_SUPPLY_PROP_STATUS,
 609         POWER_SUPPLY_PROP_PRESENT,
 610         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 611         POWER_SUPPLY_PROP_CURRENT_NOW,
 612         POWER_SUPPLY_PROP_CAPACITY,
 613         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 614         POWER_SUPPLY_PROP_TEMP,
 615         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 616         POWER_SUPPLY_PROP_TECHNOLOGY,
 617         POWER_SUPPLY_PROP_CHARGE_FULL,
 618         POWER_SUPPLY_PROP_CHARGE_NOW,
 619         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 620         POWER_SUPPLY_PROP_CYCLE_COUNT,
 621         POWER_SUPPLY_PROP_HEALTH,
 622         POWER_SUPPLY_PROP_MANUFACTURER,
 623 };
 624
 625 static enum power_supply_property bq27520g1_battery_props[] = {
 626         POWER_SUPPLY_PROP_STATUS,
 627         POWER_SUPPLY_PROP_PRESENT,
 628         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 629         POWER_SUPPLY_PROP_CURRENT_NOW,
 630         POWER_SUPPLY_PROP_CAPACITY,
 631         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 632         POWER_SUPPLY_PROP_TEMP,
 633         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 634         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 635         POWER_SUPPLY_PROP_TECHNOLOGY,
 636         POWER_SUPPLY_PROP_CHARGE_FULL,
 637         POWER_SUPPLY_PROP_CHARGE_NOW,
 638         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 639         POWER_SUPPLY_PROP_ENERGY_NOW,
 640         POWER_SUPPLY_PROP_POWER_AVG,
 641         POWER_SUPPLY_PROP_HEALTH,
 642         POWER_SUPPLY_PROP_MANUFACTURER,
 643 };
 644
 645 static enum power_supply_property bq27520g2_battery_props[] = {
 646         POWER_SUPPLY_PROP_STATUS,
 647         POWER_SUPPLY_PROP_PRESENT,
 648         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 649         POWER_SUPPLY_PROP_CURRENT_NOW,
 650         POWER_SUPPLY_PROP_CAPACITY,
 651         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 652         POWER_SUPPLY_PROP_TEMP,
 653         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 654         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 655         POWER_SUPPLY_PROP_TECHNOLOGY,
 656         POWER_SUPPLY_PROP_CHARGE_FULL,
 657         POWER_SUPPLY_PROP_CHARGE_NOW,
 658         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 659         POWER_SUPPLY_PROP_CYCLE_COUNT,
 660         POWER_SUPPLY_PROP_ENERGY_NOW,
 661         POWER_SUPPLY_PROP_POWER_AVG,
 662         POWER_SUPPLY_PROP_HEALTH,
 663         POWER_SUPPLY_PROP_MANUFACTURER,
 664 };
 665
 666 static enum power_supply_property bq27520g3_battery_props[] = {
 667         POWER_SUPPLY_PROP_STATUS,
 668         POWER_SUPPLY_PROP_PRESENT,
 669         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 670         POWER_SUPPLY_PROP_CURRENT_NOW,
 671         POWER_SUPPLY_PROP_CAPACITY,
 672         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 673         POWER_SUPPLY_PROP_TEMP,
 674         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 675         POWER_SUPPLY_PROP_TECHNOLOGY,
 676         POWER_SUPPLY_PROP_CHARGE_FULL,
 677         POWER_SUPPLY_PROP_CHARGE_NOW,
 678         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 679         POWER_SUPPLY_PROP_CYCLE_COUNT,
 680         POWER_SUPPLY_PROP_ENERGY_NOW,
 681         POWER_SUPPLY_PROP_POWER_AVG,
 682         POWER_SUPPLY_PROP_HEALTH,
 683         POWER_SUPPLY_PROP_MANUFACTURER,
 684 };
 685
 686 static enum power_supply_property bq27520g4_battery_props[] = {
 687         POWER_SUPPLY_PROP_STATUS,
 688         POWER_SUPPLY_PROP_PRESENT,
 689         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 690         POWER_SUPPLY_PROP_CURRENT_NOW,
 691         POWER_SUPPLY_PROP_CAPACITY,
 692         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 693         POWER_SUPPLY_PROP_TEMP,
 694         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 695         POWER_SUPPLY_PROP_TECHNOLOGY,
 696         POWER_SUPPLY_PROP_CHARGE_FULL,
 697         POWER_SUPPLY_PROP_CHARGE_NOW,
 698         POWER_SUPPLY_PROP_CYCLE_COUNT,
 699         POWER_SUPPLY_PROP_HEALTH,
 700         POWER_SUPPLY_PROP_MANUFACTURER,
 701 };
 702
 703 static enum power_supply_property bq27530_battery_props[] = {
 704         POWER_SUPPLY_PROP_STATUS,
 705         POWER_SUPPLY_PROP_PRESENT,
 706         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 707         POWER_SUPPLY_PROP_CURRENT_NOW,
 708         POWER_SUPPLY_PROP_CAPACITY,
 709         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 710         POWER_SUPPLY_PROP_TEMP,
 711         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 712         POWER_SUPPLY_PROP_TECHNOLOGY,
 713         POWER_SUPPLY_PROP_CHARGE_FULL,
 714         POWER_SUPPLY_PROP_CHARGE_NOW,
 715         POWER_SUPPLY_PROP_POWER_AVG,
 716         POWER_SUPPLY_PROP_HEALTH,
 717         POWER_SUPPLY_PROP_CYCLE_COUNT,
 718         POWER_SUPPLY_PROP_MANUFACTURER,
 719 };
 720
 721 static enum power_supply_property bq27541_battery_props[] = {
 722         POWER_SUPPLY_PROP_STATUS,
 723         POWER_SUPPLY_PROP_PRESENT,
 724         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 725         POWER_SUPPLY_PROP_CURRENT_NOW,
 726         POWER_SUPPLY_PROP_CAPACITY,
 727         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 728         POWER_SUPPLY_PROP_TEMP,
 729         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 730         POWER_SUPPLY_PROP_TECHNOLOGY,
 731         POWER_SUPPLY_PROP_CHARGE_FULL,
 732         POWER_SUPPLY_PROP_CHARGE_NOW,
 733         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 734         POWER_SUPPLY_PROP_CYCLE_COUNT,
 735         POWER_SUPPLY_PROP_POWER_AVG,
 736         POWER_SUPPLY_PROP_HEALTH,
 737         POWER_SUPPLY_PROP_MANUFACTURER,
 738 };
 739
 740 static enum power_supply_property bq27545_battery_props[] = {
 741         POWER_SUPPLY_PROP_STATUS,
 742         POWER_SUPPLY_PROP_PRESENT,
 743         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 744         POWER_SUPPLY_PROP_CURRENT_NOW,
 745         POWER_SUPPLY_PROP_CAPACITY,
 746         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 747         POWER_SUPPLY_PROP_TEMP,
 748         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 749         POWER_SUPPLY_PROP_TECHNOLOGY,
 750         POWER_SUPPLY_PROP_CHARGE_FULL,
 751         POWER_SUPPLY_PROP_CHARGE_NOW,
 752         POWER_SUPPLY_PROP_HEALTH,
 753         POWER_SUPPLY_PROP_CYCLE_COUNT,
 754         POWER_SUPPLY_PROP_POWER_AVG,
 755         POWER_SUPPLY_PROP_MANUFACTURER,
 756 };
 757
 758 static enum power_supply_property bq27421_battery_props[] = {
 759         POWER_SUPPLY_PROP_STATUS,
 760         POWER_SUPPLY_PROP_PRESENT,
 761         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 762         POWER_SUPPLY_PROP_CURRENT_NOW,
 763         POWER_SUPPLY_PROP_CAPACITY,
 764         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 765         POWER_SUPPLY_PROP_TEMP,
 766         POWER_SUPPLY_PROP_TECHNOLOGY,
 767         POWER_SUPPLY_PROP_CHARGE_FULL,
 768         POWER_SUPPLY_PROP_CHARGE_NOW,
 769         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 770         POWER_SUPPLY_PROP_MANUFACTURER,
 771 };
 772
 773 #define BQ27XXX_PROP(_id, _prop)                \
 774         [_id] = {                               \
 775                 .props = _prop,                 \
 776                 .size = ARRAY_SIZE(_prop),      \
 777         }
 778
 779 static struct {
 780         enum power_supply_property *props;
 781         size_t size;
 782 } bq27xxx_battery_props[] = {
 783         BQ27XXX_PROP(BQ27000, bq27000_battery_props),
 784         BQ27XXX_PROP(BQ27010, bq27010_battery_props),
 785         BQ27XXX_PROP(BQ2750X, bq2750x_battery_props),
 786         BQ27XXX_PROP(BQ2751X, bq2751x_battery_props),
 787         BQ27XXX_PROP(BQ27500, bq27500_battery_props),
 788         BQ27XXX_PROP(BQ27510G1, bq27510g1_battery_props),
 789         BQ27XXX_PROP(BQ27510G2, bq27510g2_battery_props),
 790         BQ27XXX_PROP(BQ27510G3, bq27510g3_battery_props),
 791         BQ27XXX_PROP(BQ27520G1, bq27520g1_battery_props),
 792         BQ27XXX_PROP(BQ27520G2, bq27520g2_battery_props),
 793         BQ27XXX_PROP(BQ27520G3, bq27520g3_battery_props),
 794         BQ27XXX_PROP(BQ27520G4, bq27520g4_battery_props),
 795         BQ27XXX_PROP(BQ27530, bq27530_battery_props),
 796         BQ27XXX_PROP(BQ27541, bq27541_battery_props),
 797         BQ27XXX_PROP(BQ27545, bq27545_battery_props),
 798         BQ27XXX_PROP(BQ27421, bq27421_battery_props),
 799 };
 800
 801 static DEFINE_MUTEX(bq27xxx_list_lock);
 802 static LIST_HEAD(bq27xxx_battery_devices);
 803
 804 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
 805
 806 #define BQ27XXX_DM_SZ   32
 807
 808 struct bq27xxx_dm_reg {
 809         u8 subclass_id;
 810         u8 offset;
 811         u8 bytes;
 812         u16 min, max;
 813 };
 814
 815 /**
 816  * struct bq27xxx_dm_buf - chip data memory buffer
 817  * @class: data memory subclass_id
 818  * @block: data memory block number
 819  * @data: data from/for the block
 820  * @has_data: true if data has been filled by read
 821  * @dirty: true if data has changed since last read/write
 822  *
 823  * Encapsulates info required to manage chip data memory blocks.
 824  */
 825 struct bq27xxx_dm_buf {
 826         u8 class;
 827         u8 block;
 828         u8 data[BQ27XXX_DM_SZ];
 829         bool has_data, dirty;
 830 };
 831
 832 #define BQ27XXX_DM_BUF(di, i) { \
 833         .class = (di)->dm_regs[i].subclass_id, \
 834         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
 835 }
 836
 837 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
 838                                       struct bq27xxx_dm_reg *reg)
 839 {
 840         if (buf->class == reg->subclass_id &&
 841             buf->block == reg->offset / BQ27XXX_DM_SZ)
 842                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
 843
 844         return NULL;
 845 }
 846
 847 enum bq27xxx_dm_reg_id {
 848         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 849         BQ27XXX_DM_DESIGN_ENERGY,
 850         BQ27XXX_DM_TERMINATE_VOLTAGE,
 851 };
 852
 853 static const char * const bq27xxx_dm_reg_name[] = {
 854         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
 855         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
 856         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
 857 };
 858
 859
 860 static bool bq27xxx_dt_to_nvm = true;
 861 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
 862 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
 863         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
 864         "Users must set this =0 when installing a different type of battery!\n"
 865         "Default is =1."
 866 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
 867         "\nSetting this affects future kernel updates, not the current configuration."
 868 #endif
 869 );
 870
 871 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
 872 {
 873         struct bq27xxx_device_info *di;
 874         unsigned int prev_val = *(unsigned int *) kp->arg;
 875         int ret;
 876
 877         ret = param_set_uint(val, kp);
 878         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
 879                 return ret;
 880
 881         mutex_lock(&bq27xxx_list_lock);
 882         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
 883                 cancel_delayed_work_sync(&di->work);
 884                 schedule_delayed_work(&di->work, 0);
 885         }
 886         mutex_unlock(&bq27xxx_list_lock);
 887
 888         return ret;
 889 }
 890
 891 static const struct kernel_param_ops param_ops_poll_interval = {
 892         .get = param_get_uint,
 893         .set = poll_interval_param_set,
 894 };
 895
 896 static unsigned int poll_interval = 360;
 897 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
 898 MODULE_PARM_DESC(poll_interval,
 899                  "battery poll interval in seconds - 0 disables polling");
 900
 901 /*
 902  * Common code for BQ27xxx devices
 903  */
 904
 905 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
 906                                bool single)
 907 {
 908         int ret;
 909
 910         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 911                 return -EINVAL;
 912
 913         ret = di->bus.read(di, di->regs[reg_index], single);
 914         if (ret < 0)
 915                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
 916                         di->regs[reg_index], reg_index);
 917
 918         return ret;
 919 }
 920
 921 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
 922                                 u16 value, bool single)
 923 {
 924         int ret;
 925
 926         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 927                 return -EINVAL;
 928
 929         if (!di->bus.write)
 930                 return -EPERM;
 931
 932         ret = di->bus.write(di, di->regs[reg_index], value, single);
 933         if (ret < 0)
 934                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
 935                         di->regs[reg_index], reg_index);
 936
 937         return ret;
 938 }
 939
 940 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
 941                                      u8 *data, int len)
 942 {
 943         int ret;
 944
 945         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 946                 return -EINVAL;
 947
 948         if (!di->bus.read_bulk)
 949                 return -EPERM;
 950
 951         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
 952         if (ret < 0)
 953                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
 954                         di->regs[reg_index], reg_index);
 955
 956         return ret;
 957 }
 958
 959 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
 960                                       u8 *data, int len)
 961 {
 962         int ret;
 963
 964         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 965                 return -EINVAL;
 966
 967         if (!di->bus.write_bulk)
 968                 return -EPERM;
 969
 970         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
 971         if (ret < 0)
 972                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
 973                         di->regs[reg_index], reg_index);
 974
 975         return ret;
 976 }
 977
 978 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
 979 {
 980         int ret;
 981
 982         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
 983         if (ret < 0) {
 984                 dev_err(di->dev, "bus error on seal: %d\n", ret);
 985                 return ret;
 986         }
 987
 988         return 0;
 989 }
 990
 991 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
 992 {
 993         int ret;
 994
 995         if (di->unseal_key == 0) {
 996                 dev_err(di->dev, "unseal failed due to missing key\n");
 997                 return -EINVAL;
 998         }
 999
1000         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1001         if (ret < 0)
1002                 goto out;
1003
1004         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1005         if (ret < 0)
1006                 goto out;
1007
1008         return 0;
1009
1010 out:
1011         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1012         return ret;
1013 }
1014
1015 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1016 {
1017         u16 sum = 0;
1018         int i;
1019
1020         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1021                 sum += buf->data[i];
1022         sum &= 0xff;
1023
1024         return 0xff - sum;
1025 }
1026
1027 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1028                                          struct bq27xxx_dm_buf *buf)
1029 {
1030         int ret;
1031
1032         buf->has_data = false;
1033
1034         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1035         if (ret < 0)
1036                 goto out;
1037
1038         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1039         if (ret < 0)
1040                 goto out;
1041
1042         BQ27XXX_MSLEEP(1);
1043
1044         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1045         if (ret < 0)
1046                 goto out;
1047
1048         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1049         if (ret < 0)
1050                 goto out;
1051
1052         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1053                 ret = -EINVAL;
1054                 goto out;
1055         }
1056
1057         buf->has_data = true;
1058         buf->dirty = false;
1059
1060         return 0;
1061
1062 out:
1063         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1064         return ret;
1065 }
1066
1067 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1068                                             struct bq27xxx_dm_buf *buf,
1069                                             enum bq27xxx_dm_reg_id reg_id,
1070                                             unsigned int val)
1071 {
1072         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1073         const char *str = bq27xxx_dm_reg_name[reg_id];
1074         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1075
1076         if (prev == NULL) {
1077                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1078                 return;
1079         }
1080
1081         if (reg->bytes != 2) {
1082                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1083                 return;
1084         }
1085
1086         if (!buf->has_data)
1087                 return;
1088
1089         if (be16_to_cpup(prev) == val) {
1090                 dev_info(di->dev, "%s has %u\n", str, val);
1091                 return;
1092         }
1093
1094 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1095         if (!di->ram_chip && !bq27xxx_dt_to_nvm) {
1096 #else
1097         if (!di->ram_chip) {
1098 #endif
1099                 /* devicetree and NVM differ; defer to NVM */
1100                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1101 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1102                          "by dt_monitored_battery_updates_nvm=0"
1103 #else
1104                          "for flash/NVM data memory"
1105 #endif
1106                          "\n", str, be16_to_cpup(prev), val);
1107                 return;
1108         }
1109
1110         dev_info(di->dev, "update %s to %u\n", str, val);
1111
1112         *prev = cpu_to_be16(val);
1113         buf->dirty = true;
1114 }
1115
1116 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1117 {
1118         const int limit = 100;
1119         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1120         int ret, try = limit;
1121
1122         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1123         if (ret < 0)
1124                 return ret;
1125
1126         do {
1127                 BQ27XXX_MSLEEP(25);
1128                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1129                 if (ret < 0)
1130                         return ret;
1131         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1132
1133         if (!try) {
1134                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1135                 return -EINVAL;
1136         }
1137
1138         if (limit - try > 3)
1139                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1140
1141         return 0;
1142 }
1143
1144 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1145 {
1146         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1147         if (ret < 0 && ret != -EINVAL)
1148                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1149
1150         return ret;
1151 }
1152
1153 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1154 {
1155         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1156         if (ret < 0 && ret != -EINVAL)
1157                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1158
1159         return ret;
1160 }
1161
1162 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1163                                           struct bq27xxx_dm_buf *buf)
1164 {
1165         bool cfgup = di->chip == BQ27421; /* assume related chips need cfgupdate */
1166         int ret;
1167
1168         if (!buf->dirty)
1169                 return 0;
1170
1171         if (cfgup) {
1172                 ret = bq27xxx_battery_set_cfgupdate(di);
1173                 if (ret < 0)
1174                         return ret;
1175         }
1176
1177         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1178         if (ret < 0)
1179                 goto out;
1180
1181         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1182         if (ret < 0)
1183                 goto out;
1184
1185         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1186         if (ret < 0)
1187                 goto out;
1188
1189         BQ27XXX_MSLEEP(1);
1190
1191         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1192         if (ret < 0)
1193                 goto out;
1194
1195         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1196                             bq27xxx_battery_checksum_dm_block(buf), true);
1197         if (ret < 0)
1198                 goto out;
1199
1200         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1201          * corruption on the '425 chip (and perhaps others), which can damage
1202          * the chip.
1203          */
1204
1205         if (cfgup) {
1206                 BQ27XXX_MSLEEP(1);
1207                 ret = bq27xxx_battery_soft_reset(di);
1208                 if (ret < 0)
1209                         return ret;
1210         } else {
1211                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1212         }
1213
1214         buf->dirty = false;
1215
1216         return 0;
1217
1218 out:
1219         if (cfgup)
1220                 bq27xxx_battery_soft_reset(di);
1221
1222         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1223         return ret;
1224 }
1225
1226 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1227                                        struct power_supply_battery_info *info)
1228 {
1229         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1230         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1231         bool updated;
1232
1233         if (bq27xxx_battery_unseal(di) < 0)
1234                 return;
1235
1236         if (info->charge_full_design_uah != -EINVAL &&
1237             info->energy_full_design_uwh != -EINVAL) {
1238                 bq27xxx_battery_read_dm_block(di, &bd);
1239                 /* assume design energy & capacity are in same block */
1240                 bq27xxx_battery_update_dm_block(di, &bd,
1241                                         BQ27XXX_DM_DESIGN_CAPACITY,
1242                                         info->charge_full_design_uah / 1000);
1243                 bq27xxx_battery_update_dm_block(di, &bd,
1244                                         BQ27XXX_DM_DESIGN_ENERGY,
1245                                         info->energy_full_design_uwh / 1000);
1246         }
1247
1248         if (info->voltage_min_design_uv != -EINVAL) {
1249                 bool same = bd.class == bt.class && bd.block == bt.block;
1250                 if (!same)
1251                         bq27xxx_battery_read_dm_block(di, &bt);
1252                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1253                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1254                                         info->voltage_min_design_uv / 1000);
1255         }
1256
1257         updated = bd.dirty || bt.dirty;
1258
1259         bq27xxx_battery_write_dm_block(di, &bd);
1260         bq27xxx_battery_write_dm_block(di, &bt);
1261
1262         bq27xxx_battery_seal(di);
1263
1264         if (updated && di->chip != BQ27421) { /* not a cfgupdate chip, so reset */
1265                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1266                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1267         }
1268         /* assume bq27xxx_battery_update() is called hereafter */
1269 }
1270
1271 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1272 {
1273         struct power_supply_battery_info info = {};
1274         unsigned int min, max;
1275
1276         if (power_supply_get_battery_info(di->bat, &info) < 0)
1277                 return;
1278
1279         if (!di->dm_regs) {
1280                 dev_warn(di->dev, "data memory update not supported for chip\n");
1281                 return;
1282         }
1283
1284         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1285                 if (info.energy_full_design_uwh == -EINVAL)
1286                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1287                 else if (info.charge_full_design_uah == -EINVAL)
1288                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1289         }
1290
1291         /* assume min == 0 */
1292         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1293         if (info.energy_full_design_uwh > max * 1000) {
1294                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1295                         info.energy_full_design_uwh);
1296                 info.energy_full_design_uwh = -EINVAL;
1297         }
1298
1299         /* assume min == 0 */
1300         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1301         if (info.charge_full_design_uah > max * 1000) {
1302                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1303                         info.charge_full_design_uah);
1304                 info.charge_full_design_uah = -EINVAL;
1305         }
1306
1307         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1308         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1309         if ((info.voltage_min_design_uv < min * 1000 ||
1310              info.voltage_min_design_uv > max * 1000) &&
1311              info.voltage_min_design_uv != -EINVAL) {
1312                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1313                         info.voltage_min_design_uv);
1314                 info.voltage_min_design_uv = -EINVAL;
1315         }
1316
1317         if ((info.energy_full_design_uwh != -EINVAL &&
1318              info.charge_full_design_uah != -EINVAL) ||
1319              info.voltage_min_design_uv  != -EINVAL)
1320                 bq27xxx_battery_set_config(di, &info);
1321 }
1322
1323 /*
1324  * Return the battery State-of-Charge
1325  * Or < 0 if something fails.
1326  */
1327 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1328 {
1329         int soc;
1330
1331         if (di->chip == BQ27000 || di->chip == BQ27010)
1332                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1333         else
1334                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1335
1336         if (soc < 0)
1337                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1338
1339         return soc;
1340 }
1341
1342 /*
1343  * Return a battery charge value in µAh
1344  * Or < 0 if something fails.
1345  */
1346 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1347 {
1348         int charge;
1349
1350         charge = bq27xxx_read(di, reg, false);
1351         if (charge < 0) {
1352                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1353                         reg, charge);
1354                 return charge;
1355         }
1356
1357         if (di->chip == BQ27000 || di->chip == BQ27010)
1358                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1359         else
1360                 charge *= 1000;
1361
1362         return charge;
1363 }
1364
1365 /*
1366  * Return the battery Nominal available capacity in µAh
1367  * Or < 0 if something fails.
1368  */
1369 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1370 {
1371         int flags;
1372
1373         if (di->chip == BQ27000 || di->chip == BQ27010) {
1374                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1375                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1376                         return -ENODATA;
1377         }
1378
1379         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1380 }
1381
1382 /*
1383  * Return the battery Full Charge Capacity in µAh
1384  * Or < 0 if something fails.
1385  */
1386 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1387 {
1388         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1389 }
1390
1391 /*
1392  * Return the Design Capacity in µAh
1393  * Or < 0 if something fails.
1394  */
1395 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1396 {
1397         int dcap;
1398
1399         if (di->chip == BQ27000 || di->chip == BQ27010)
1400                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1401         else
1402                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1403
1404         if (dcap < 0) {
1405                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1406                 return dcap;
1407         }
1408
1409         if (di->chip == BQ27000 || di->chip == BQ27010)
1410                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1411         else
1412                 dcap *= 1000;
1413
1414         return dcap;
1415 }
1416
1417 /*
1418  * Return the battery Available energy in µWh
1419  * Or < 0 if something fails.
1420  */
1421 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1422 {
1423         int ae;
1424
1425         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1426         if (ae < 0) {
1427                 dev_dbg(di->dev, "error reading available energy\n");
1428                 return ae;
1429         }
1430
1431         if (di->chip == BQ27000 || di->chip == BQ27010)
1432                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1433         else
1434                 ae *= 1000;
1435
1436         return ae;
1437 }
1438
1439 /*
1440  * Return the battery temperature in tenths of degree Kelvin
1441  * Or < 0 if something fails.
1442  */
1443 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1444 {
1445         int temp;
1446
1447         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1448         if (temp < 0) {
1449                 dev_err(di->dev, "error reading temperature\n");
1450                 return temp;
1451         }
1452
1453         if (di->chip == BQ27000 || di->chip == BQ27010)
1454                 temp = 5 * temp / 2;
1455
1456         return temp;
1457 }
1458
1459 /*
1460  * Return the battery Cycle count total
1461  * Or < 0 if something fails.
1462  */
1463 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1464 {
1465         int cyct;
1466
1467         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1468         if (cyct < 0)
1469                 dev_err(di->dev, "error reading cycle count total\n");
1470
1471         return cyct;
1472 }
1473
1474 /*
1475  * Read a time register.
1476  * Return < 0 if something fails.
1477  */
1478 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1479 {
1480         int tval;
1481
1482         tval = bq27xxx_read(di, reg, false);
1483         if (tval < 0) {
1484                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1485                         reg, tval);
1486                 return tval;
1487         }
1488
1489         if (tval == 65535)
1490                 return -ENODATA;
1491
1492         return tval * 60;
1493 }
1494
1495 /*
1496  * Read an average power register.
1497  * Return < 0 if something fails.
1498  */
1499 static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
1500 {
1501         int tval;
1502
1503         tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1504         if (tval < 0) {
1505                 dev_err(di->dev, "error reading average power register  %02x: %d\n",
1506                         BQ27XXX_REG_AP, tval);
1507                 return tval;
1508         }
1509
1510         if (di->chip == BQ27000 || di->chip == BQ27010)
1511                 return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1512         else
1513                 return tval;
1514 }
1515
1516 /*
1517  * Returns true if a battery over temperature condition is detected
1518  */
1519 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1520 {
1521         switch (di->chip) {
1522         case BQ2750X:
1523         case BQ2751X:
1524         case BQ27500:
1525         case BQ27510G1:
1526         case BQ27510G2:
1527         case BQ27510G3:
1528         case BQ27520G1:
1529         case BQ27520G2:
1530         case BQ27520G3:
1531         case BQ27520G4:
1532         case BQ27541:
1533         case BQ27545:
1534                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1535         case BQ27530:
1536         case BQ27421:
1537                 return flags & BQ27XXX_FLAG_OT;
1538         default:
1539                 return false;
1540         }
1541 }
1542
1543 /*
1544  * Returns true if a battery under temperature condition is detected
1545  */
1546 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1547 {
1548         if (di->chip == BQ27530 || di->chip == BQ27421)
1549                 return flags & BQ27XXX_FLAG_UT;
1550
1551         return false;
1552 }
1553
1554 /*
1555  * Returns true if a low state of charge condition is detected
1556  */
1557 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1558 {
1559         if (di->chip == BQ27000 || di->chip == BQ27010)
1560                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1561         else
1562                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1563 }
1564
1565 /*
1566  * Read flag register.
1567  * Return < 0 if something fails.
1568  */
1569 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1570 {
1571         int flags;
1572         bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
1573
1574         flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1575         if (flags < 0) {
1576                 dev_err(di->dev, "error reading flag register:%d\n", flags);
1577                 return flags;
1578         }
1579
1580         /* Unlikely but important to return first */
1581         if (unlikely(bq27xxx_battery_overtemp(di, flags)))
1582                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1583         if (unlikely(bq27xxx_battery_undertemp(di, flags)))
1584                 return POWER_SUPPLY_HEALTH_COLD;
1585         if (unlikely(bq27xxx_battery_dead(di, flags)))
1586                 return POWER_SUPPLY_HEALTH_DEAD;
1587
1588         return POWER_SUPPLY_HEALTH_GOOD;
1589 }
1590
1591 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1592 {
1593         struct bq27xxx_reg_cache cache = {0, };
1594         bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010;
1595         bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
1596
1597         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1598         if ((cache.flags & 0xff) == 0xff)
1599                 cache.flags = -1; /* read error */
1600         if (cache.flags >= 0) {
1601                 cache.temperature = bq27xxx_battery_read_temperature(di);
1602                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1603                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1604                         cache.capacity = -ENODATA;
1605                         cache.energy = -ENODATA;
1606                         cache.time_to_empty = -ENODATA;
1607                         cache.time_to_empty_avg = -ENODATA;
1608                         cache.time_to_full = -ENODATA;
1609                         cache.charge_full = -ENODATA;
1610                         cache.health = -ENODATA;
1611                 } else {
1612                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1613                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1614                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1615                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1616                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1617                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1618                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1619                         cache.capacity = bq27xxx_battery_read_soc(di);
1620                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1621                                 cache.energy = bq27xxx_battery_read_energy(di);
1622                         cache.health = bq27xxx_battery_read_health(di);
1623                 }
1624                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1625                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1626                 if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
1627                         cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
1628
1629                 /* We only have to read charge design full once */
1630                 if (di->charge_design_full <= 0)
1631                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1632         }
1633
1634         if (di->cache.capacity != cache.capacity)
1635                 power_supply_changed(di->bat);
1636
1637         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1638                 di->cache = cache;
1639
1640         di->last_update = jiffies;
1641 }
1642 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1643
1644 static void bq27xxx_battery_poll(struct work_struct *work)
1645 {
1646         struct bq27xxx_device_info *di =
1647                         container_of(work, struct bq27xxx_device_info,
1648                                      work.work);
1649
1650         bq27xxx_battery_update(di);
1651
1652         if (poll_interval > 0)
1653                 schedule_delayed_work(&di->work, poll_interval * HZ);
1654 }
1655
1656 /*
1657  * Return the battery average current in µA
1658  * Note that current can be negative signed as well
1659  * Or 0 if something fails.
1660  */
1661 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1662                                    union power_supply_propval *val)
1663 {
1664         int curr;
1665         int flags;
1666
1667         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1668         if (curr < 0) {
1669                 dev_err(di->dev, "error reading current\n");
1670                 return curr;
1671         }
1672
1673         if (di->chip == BQ27000 || di->chip == BQ27010) {
1674                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1675                 if (flags & BQ27000_FLAG_CHGS) {
1676                         dev_dbg(di->dev, "negative current!\n");
1677                         curr = -curr;
1678                 }
1679
1680                 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1681         } else {
1682                 /* Other gauges return signed value */
1683                 val->intval = (int)((s16)curr) * 1000;
1684         }
1685
1686         return 0;
1687 }
1688
1689 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1690                                   union power_supply_propval *val)
1691 {
1692         int status;
1693
1694         if (di->chip == BQ27000 || di->chip == BQ27010) {
1695                 if (di->cache.flags & BQ27000_FLAG_FC)
1696                         status = POWER_SUPPLY_STATUS_FULL;
1697                 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1698                         status = POWER_SUPPLY_STATUS_CHARGING;
1699                 else if (power_supply_am_i_supplied(di->bat))
1700                         status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1701                 else
1702                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1703         } else {
1704                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1705                         status = POWER_SUPPLY_STATUS_FULL;
1706                 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1707                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1708                 else
1709                         status = POWER_SUPPLY_STATUS_CHARGING;
1710         }
1711
1712         val->intval = status;
1713
1714         return 0;
1715 }
1716
1717 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1718                                           union power_supply_propval *val)
1719 {
1720         int level;
1721
1722         if (di->chip == BQ27000 || di->chip == BQ27010) {
1723                 if (di->cache.flags & BQ27000_FLAG_FC)
1724                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1725                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1726                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1727                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1728                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1729                 else
1730                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1731         } else {
1732                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1733                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1734                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1735                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1736                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1737                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1738                 else
1739                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1740         }
1741
1742         val->intval = level;
1743
1744         return 0;
1745 }
1746
1747 /*
1748  * Return the battery Voltage in millivolts
1749  * Or < 0 if something fails.
1750  */
1751 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1752                                    union power_supply_propval *val)
1753 {
1754         int volt;
1755
1756         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1757         if (volt < 0) {
1758                 dev_err(di->dev, "error reading voltage\n");
1759                 return volt;
1760         }
1761
1762         val->intval = volt * 1000;
1763
1764         return 0;
1765 }
1766
1767 static int bq27xxx_simple_value(int value,
1768                                 union power_supply_propval *val)
1769 {
1770         if (value < 0)
1771                 return value;
1772
1773         val->intval = value;
1774
1775         return 0;
1776 }
1777
1778 static int bq27xxx_battery_get_property(struct power_supply *psy,
1779                                         enum power_supply_property psp,
1780                                         union power_supply_propval *val)
1781 {
1782         int ret = 0;
1783         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1784
1785         mutex_lock(&di->lock);
1786         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1787                 cancel_delayed_work_sync(&di->work);
1788                 bq27xxx_battery_poll(&di->work.work);
1789         }
1790         mutex_unlock(&di->lock);
1791
1792         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1793                 return -ENODEV;
1794
1795         switch (psp) {
1796         case POWER_SUPPLY_PROP_STATUS:
1797                 ret = bq27xxx_battery_status(di, val);
1798                 break;
1799         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1800                 ret = bq27xxx_battery_voltage(di, val);
1801                 break;
1802         case POWER_SUPPLY_PROP_PRESENT:
1803                 val->intval = di->cache.flags < 0 ? 0 : 1;
1804                 break;
1805         case POWER_SUPPLY_PROP_CURRENT_NOW:
1806                 ret = bq27xxx_battery_current(di, val);
1807                 break;
1808         case POWER_SUPPLY_PROP_CAPACITY:
1809                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1810                 break;
1811         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1812                 ret = bq27xxx_battery_capacity_level(di, val);
1813                 break;
1814         case POWER_SUPPLY_PROP_TEMP:
1815                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1816                 if (ret == 0)
1817                         val->intval -= 2731; /* convert decidegree k to c */
1818                 break;
1819         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1820                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1821                 break;
1822         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1823                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1824                 break;
1825         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1826                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1827                 break;
1828         case POWER_SUPPLY_PROP_TECHNOLOGY:
1829                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1830                 break;
1831         case POWER_SUPPLY_PROP_CHARGE_NOW:
1832                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1833                 break;
1834         case POWER_SUPPLY_PROP_CHARGE_FULL:
1835                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1836                 break;
1837         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1838                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1839                 break;
1840         /*
1841          * TODO: Implement these to make registers set from
1842          * power_supply_battery_info visible in sysfs.
1843          */
1844         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1845         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1846                 return -EINVAL;
1847         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1848                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1849                 break;
1850         case POWER_SUPPLY_PROP_ENERGY_NOW:
1851                 ret = bq27xxx_simple_value(di->cache.energy, val);
1852                 break;
1853         case POWER_SUPPLY_PROP_POWER_AVG:
1854                 ret = bq27xxx_simple_value(di->cache.power_avg, val);
1855                 break;
1856         case POWER_SUPPLY_PROP_HEALTH:
1857                 ret = bq27xxx_simple_value(di->cache.health, val);
1858                 break;
1859         case POWER_SUPPLY_PROP_MANUFACTURER:
1860                 val->strval = BQ27XXX_MANUFACTURER;
1861                 break;
1862         default:
1863                 return -EINVAL;
1864         }
1865
1866         return ret;
1867 }
1868
1869 static void bq27xxx_external_power_changed(struct power_supply *psy)
1870 {
1871         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1872
1873         cancel_delayed_work_sync(&di->work);
1874         schedule_delayed_work(&di->work, 0);
1875 }
1876
1877 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1878 {
1879         struct power_supply_desc *psy_desc;
1880         struct power_supply_config psy_cfg = {
1881                 .of_node = di->dev->of_node,
1882                 .drv_data = di,
1883         };
1884
1885         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1886         mutex_init(&di->lock);
1887         di->regs = bq27xxx_regs[di->chip];
1888
1889         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1890         if (!psy_desc)
1891                 return -ENOMEM;
1892
1893         psy_desc->name = di->name;
1894         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1895         psy_desc->properties = bq27xxx_battery_props[di->chip].props;
1896         psy_desc->num_properties = bq27xxx_battery_props[di->chip].size;
1897         psy_desc->get_property = bq27xxx_battery_get_property;
1898         psy_desc->external_power_changed = bq27xxx_external_power_changed;
1899
1900         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1901         if (IS_ERR(di->bat)) {
1902                 dev_err(di->dev, "failed to register battery\n");
1903                 return PTR_ERR(di->bat);
1904         }
1905
1906         dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
1907
1908         bq27xxx_battery_settings(di);
1909         bq27xxx_battery_update(di);
1910
1911         mutex_lock(&bq27xxx_list_lock);
1912         list_add(&di->list, &bq27xxx_battery_devices);
1913         mutex_unlock(&bq27xxx_list_lock);
1914
1915         return 0;
1916 }
1917 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1918
1919 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1920 {
1921         /*
1922          * power_supply_unregister call bq27xxx_battery_get_property which
1923          * call bq27xxx_battery_poll.
1924          * Make sure that bq27xxx_battery_poll will not call
1925          * schedule_delayed_work again after unregister (which cause OOPS).
1926          */
1927         poll_interval = 0;
1928
1929         cancel_delayed_work_sync(&di->work);
1930
1931         power_supply_unregister(di->bat);
1932
1933         mutex_lock(&bq27xxx_list_lock);
1934         list_del(&di->list);
1935         mutex_unlock(&bq27xxx_list_lock);
1936
1937         mutex_destroy(&di->lock);
1938 }
1939 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1940
1941 static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg,
1942                                          bool single)
1943 {
1944         struct device *dev = di->dev;
1945         struct bq27xxx_platform_data *pdata = dev->platform_data;
1946         unsigned int timeout = 3;
1947         int upper, lower;
1948         int temp;
1949
1950         if (!single) {
1951                 /* Make sure the value has not changed in between reading the
1952                  * lower and the upper part */
1953                 upper = pdata->read(dev, reg + 1);
1954                 do {
1955                         temp = upper;
1956                         if (upper < 0)
1957                                 return upper;
1958
1959                         lower = pdata->read(dev, reg);
1960                         if (lower < 0)
1961                                 return lower;
1962
1963                         upper = pdata->read(dev, reg + 1);
1964                 } while (temp != upper && --timeout);
1965
1966                 if (timeout == 0)
1967                         return -EIO;
1968
1969                 return (upper << 8) | lower;
1970         }
1971
1972         return pdata->read(dev, reg);
1973 }
1974
1975 static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
1976 {
1977         struct bq27xxx_device_info *di;
1978         struct bq27xxx_platform_data *pdata = pdev->dev.platform_data;
1979
1980         if (!pdata) {
1981                 dev_err(&pdev->dev, "no platform_data supplied\n");
1982                 return -EINVAL;
1983         }
1984
1985         if (!pdata->read) {
1986                 dev_err(&pdev->dev, "no hdq read callback supplied\n");
1987                 return -EINVAL;
1988         }
1989
1990         if (!pdata->chip) {
1991                 dev_err(&pdev->dev, "no device supplied\n");
1992                 return -EINVAL;
1993         }
1994
1995         di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
1996         if (!di)
1997                 return -ENOMEM;
1998
1999         platform_set_drvdata(pdev, di);
2000
2001         di->dev = &pdev->dev;
2002         di->chip = pdata->chip;
2003         di->name = pdata->name ?: dev_name(&pdev->dev);
2004         di->bus.read = bq27xxx_battery_platform_read;
2005
2006         return bq27xxx_battery_setup(di);
2007 }
2008
2009 static int bq27xxx_battery_platform_remove(struct platform_device *pdev)
2010 {
2011         struct bq27xxx_device_info *di = platform_get_drvdata(pdev);
2012
2013         bq27xxx_battery_teardown(di);
2014
2015         return 0;
2016 }
2017
2018 static const struct platform_device_id bq27xxx_battery_platform_id_table[] = {
2019         { "bq27000-battery", },
2020         { /* sentinel */ }
2021 };
2022 MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table);
2023
2024 #ifdef CONFIG_OF
2025 static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = {
2026         { .compatible = "ti,bq27000" },
2027         {},
2028 };
2029 MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table);
2030 #endif
2031
2032 static struct platform_driver bq27xxx_battery_platform_driver = {
2033         .probe  = bq27xxx_battery_platform_probe,
2034         .remove = bq27xxx_battery_platform_remove,
2035         .driver = {
2036                 .name = "bq27000-battery",
2037                 .of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table),
2038         },
2039         .id_table = bq27xxx_battery_platform_id_table,
2040 };
2041 module_platform_driver(bq27xxx_battery_platform_driver);
2042
2043 MODULE_ALIAS("platform:bq27000-battery");
2044
2045 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
2046 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
2047 MODULE_LICENSE("GPL");