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 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_CFGUP      BIT(4)
  68 #define BQ27XXX_FLAG_FC         BIT(9)
  69 #define BQ27XXX_FLAG_OTD        BIT(14)
  70 #define BQ27XXX_FLAG_OTC        BIT(15)
  71 #define BQ27XXX_FLAG_UT         BIT(14)
  72 #define BQ27XXX_FLAG_OT         BIT(15)
  73
  74 /* BQ27000 has different layout for Flags register */
  75 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  76 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  77 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  78 #define BQ27000_FLAG_FC         BIT(5)
  79 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  80
  81 /* control register params */
  82 #define BQ27XXX_SEALED                  0x20
  83 #define BQ27XXX_SET_CFGUPDATE           0x13
  84 #define BQ27XXX_SOFT_RESET              0x42
  85 #define BQ27XXX_RESET                   0x41
  86
  87 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  88 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  89 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  90
  91 #define INVALID_REG_ADDR        0xff
  92
  93 /*
  94  * bq27xxx_reg_index - Register names
  95  *
  96  * These are indexes into a device's register mapping array.
  97  */
  98
  99 enum bq27xxx_reg_index {
 100         BQ27XXX_REG_CTRL = 0,   /* Control */
 101         BQ27XXX_REG_TEMP,       /* Temperature */
 102         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
 103         BQ27XXX_REG_VOLT,       /* Voltage */
 104         BQ27XXX_REG_AI,         /* Average Current */
 105         BQ27XXX_REG_FLAGS,      /* Flags */
 106         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 107         BQ27XXX_REG_TTF,        /* Time-to-Full */
 108         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 109         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 110         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 111         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 112         BQ27XXX_REG_CYCT,       /* Cycle Count */
 113         BQ27XXX_REG_AE,         /* Available Energy */
 114         BQ27XXX_REG_SOC,        /* State-of-Charge */
 115         BQ27XXX_REG_DCAP,       /* Design Capacity */
 116         BQ27XXX_REG_AP,         /* Average Power */
 117         BQ27XXX_DM_CTRL,        /* Block Data Control */
 118         BQ27XXX_DM_CLASS,       /* Data Class */
 119         BQ27XXX_DM_BLOCK,       /* Data Block */
 120         BQ27XXX_DM_DATA,        /* Block Data */
 121         BQ27XXX_DM_CKSUM,       /* Block Data Checksum */
 122         BQ27XXX_REG_MAX,        /* sentinel */
 123 };
 124
 125 #define BQ27XXX_DM_REG_ROWS \
 126         [BQ27XXX_DM_CTRL] = 0x61,  \
 127         [BQ27XXX_DM_CLASS] = 0x3e, \
 128         [BQ27XXX_DM_BLOCK] = 0x3f, \
 129         [BQ27XXX_DM_DATA] = 0x40,  \
 130         [BQ27XXX_DM_CKSUM] = 0x60
 131
 132 /* Register mappings */
 133 static u8
 134         bq27000_regs[BQ27XXX_REG_MAX] = {
 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] = 0x22,
 149                 [BQ27XXX_REG_SOC] = 0x0b,
 150                 [BQ27XXX_REG_DCAP] = 0x76,
 151                 [BQ27XXX_REG_AP] = 0x24,
 152                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 153                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 154                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 155                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 156                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 157         },
 158         bq27010_regs[BQ27XXX_REG_MAX] = {
 159                 [BQ27XXX_REG_CTRL] = 0x00,
 160                 [BQ27XXX_REG_TEMP] = 0x06,
 161                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 162                 [BQ27XXX_REG_VOLT] = 0x08,
 163                 [BQ27XXX_REG_AI] = 0x14,
 164                 [BQ27XXX_REG_FLAGS] = 0x0a,
 165                 [BQ27XXX_REG_TTE] = 0x16,
 166                 [BQ27XXX_REG_TTF] = 0x18,
 167                 [BQ27XXX_REG_TTES] = 0x1c,
 168                 [BQ27XXX_REG_TTECP] = 0x26,
 169                 [BQ27XXX_REG_NAC] = 0x0c,
 170                 [BQ27XXX_REG_FCC] = 0x12,
 171                 [BQ27XXX_REG_CYCT] = 0x2a,
 172                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 173                 [BQ27XXX_REG_SOC] = 0x0b,
 174                 [BQ27XXX_REG_DCAP] = 0x76,
 175                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 176                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 177                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 178                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 179                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 180                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 181         },
 182         bq2750x_regs[BQ27XXX_REG_MAX] = {
 183                 [BQ27XXX_REG_CTRL] = 0x00,
 184                 [BQ27XXX_REG_TEMP] = 0x06,
 185                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 186                 [BQ27XXX_REG_VOLT] = 0x08,
 187                 [BQ27XXX_REG_AI] = 0x14,
 188                 [BQ27XXX_REG_FLAGS] = 0x0a,
 189                 [BQ27XXX_REG_TTE] = 0x16,
 190                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 191                 [BQ27XXX_REG_TTES] = 0x1a,
 192                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 193                 [BQ27XXX_REG_NAC] = 0x0c,
 194                 [BQ27XXX_REG_FCC] = 0x12,
 195                 [BQ27XXX_REG_CYCT] = 0x2a,
 196                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 197                 [BQ27XXX_REG_SOC] = 0x2c,
 198                 [BQ27XXX_REG_DCAP] = 0x3c,
 199                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 200                 BQ27XXX_DM_REG_ROWS,
 201         },
 202         bq2751x_regs[BQ27XXX_REG_MAX] = {
 203                 [BQ27XXX_REG_CTRL] = 0x00,
 204                 [BQ27XXX_REG_TEMP] = 0x06,
 205                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 206                 [BQ27XXX_REG_VOLT] = 0x08,
 207                 [BQ27XXX_REG_AI] = 0x14,
 208                 [BQ27XXX_REG_FLAGS] = 0x0a,
 209                 [BQ27XXX_REG_TTE] = 0x16,
 210                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 211                 [BQ27XXX_REG_TTES] = 0x1a,
 212                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 213                 [BQ27XXX_REG_NAC] = 0x0c,
 214                 [BQ27XXX_REG_FCC] = 0x12,
 215                 [BQ27XXX_REG_CYCT] = 0x1e,
 216                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 217                 [BQ27XXX_REG_SOC] = 0x20,
 218                 [BQ27XXX_REG_DCAP] = 0x2e,
 219                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 220                 BQ27XXX_DM_REG_ROWS,
 221         },
 222 #define bq2752x_regs bq2751x_regs
 223         bq27500_regs[BQ27XXX_REG_MAX] = {
 224                 [BQ27XXX_REG_CTRL] = 0x00,
 225                 [BQ27XXX_REG_TEMP] = 0x06,
 226                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 227                 [BQ27XXX_REG_VOLT] = 0x08,
 228                 [BQ27XXX_REG_AI] = 0x14,
 229                 [BQ27XXX_REG_FLAGS] = 0x0a,
 230                 [BQ27XXX_REG_TTE] = 0x16,
 231                 [BQ27XXX_REG_TTF] = 0x18,
 232                 [BQ27XXX_REG_TTES] = 0x1c,
 233                 [BQ27XXX_REG_TTECP] = 0x26,
 234                 [BQ27XXX_REG_NAC] = 0x0c,
 235                 [BQ27XXX_REG_FCC] = 0x12,
 236                 [BQ27XXX_REG_CYCT] = 0x2a,
 237                 [BQ27XXX_REG_AE] = 0x22,
 238                 [BQ27XXX_REG_SOC] = 0x2c,
 239                 [BQ27XXX_REG_DCAP] = 0x3c,
 240                 [BQ27XXX_REG_AP] = 0x24,
 241                 BQ27XXX_DM_REG_ROWS,
 242         },
 243         bq27510g1_regs[BQ27XXX_REG_MAX] = {
 244                 [BQ27XXX_REG_CTRL] = 0x00,
 245                 [BQ27XXX_REG_TEMP] = 0x06,
 246                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 247                 [BQ27XXX_REG_VOLT] = 0x08,
 248                 [BQ27XXX_REG_AI] = 0x14,
 249                 [BQ27XXX_REG_FLAGS] = 0x0a,
 250                 [BQ27XXX_REG_TTE] = 0x16,
 251                 [BQ27XXX_REG_TTF] = 0x18,
 252                 [BQ27XXX_REG_TTES] = 0x1c,
 253                 [BQ27XXX_REG_TTECP] = 0x26,
 254                 [BQ27XXX_REG_NAC] = 0x0c,
 255                 [BQ27XXX_REG_FCC] = 0x12,
 256                 [BQ27XXX_REG_CYCT] = 0x2a,
 257                 [BQ27XXX_REG_AE] = 0x22,
 258                 [BQ27XXX_REG_SOC] = 0x2c,
 259                 [BQ27XXX_REG_DCAP] = 0x3c,
 260                 [BQ27XXX_REG_AP] = 0x24,
 261                 BQ27XXX_DM_REG_ROWS,
 262         },
 263         bq27510g2_regs[BQ27XXX_REG_MAX] = {
 264                 [BQ27XXX_REG_CTRL] = 0x00,
 265                 [BQ27XXX_REG_TEMP] = 0x06,
 266                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 267                 [BQ27XXX_REG_VOLT] = 0x08,
 268                 [BQ27XXX_REG_AI] = 0x14,
 269                 [BQ27XXX_REG_FLAGS] = 0x0a,
 270                 [BQ27XXX_REG_TTE] = 0x16,
 271                 [BQ27XXX_REG_TTF] = 0x18,
 272                 [BQ27XXX_REG_TTES] = 0x1c,
 273                 [BQ27XXX_REG_TTECP] = 0x26,
 274                 [BQ27XXX_REG_NAC] = 0x0c,
 275                 [BQ27XXX_REG_FCC] = 0x12,
 276                 [BQ27XXX_REG_CYCT] = 0x2a,
 277                 [BQ27XXX_REG_AE] = 0x22,
 278                 [BQ27XXX_REG_SOC] = 0x2c,
 279                 [BQ27XXX_REG_DCAP] = 0x3c,
 280                 [BQ27XXX_REG_AP] = 0x24,
 281                 BQ27XXX_DM_REG_ROWS,
 282         },
 283         bq27510g3_regs[BQ27XXX_REG_MAX] = {
 284                 [BQ27XXX_REG_CTRL] = 0x00,
 285                 [BQ27XXX_REG_TEMP] = 0x06,
 286                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 287                 [BQ27XXX_REG_VOLT] = 0x08,
 288                 [BQ27XXX_REG_AI] = 0x14,
 289                 [BQ27XXX_REG_FLAGS] = 0x0a,
 290                 [BQ27XXX_REG_TTE] = 0x16,
 291                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 292                 [BQ27XXX_REG_TTES] = 0x1a,
 293                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 294                 [BQ27XXX_REG_NAC] = 0x0c,
 295                 [BQ27XXX_REG_FCC] = 0x12,
 296                 [BQ27XXX_REG_CYCT] = 0x1e,
 297                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 298                 [BQ27XXX_REG_SOC] = 0x20,
 299                 [BQ27XXX_REG_DCAP] = 0x2e,
 300                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 301                 BQ27XXX_DM_REG_ROWS,
 302         },
 303         bq27520g1_regs[BQ27XXX_REG_MAX] = {
 304                 [BQ27XXX_REG_CTRL] = 0x00,
 305                 [BQ27XXX_REG_TEMP] = 0x06,
 306                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 307                 [BQ27XXX_REG_VOLT] = 0x08,
 308                 [BQ27XXX_REG_AI] = 0x14,
 309                 [BQ27XXX_REG_FLAGS] = 0x0a,
 310                 [BQ27XXX_REG_TTE] = 0x16,
 311                 [BQ27XXX_REG_TTF] = 0x18,
 312                 [BQ27XXX_REG_TTES] = 0x1c,
 313                 [BQ27XXX_REG_TTECP] = 0x26,
 314                 [BQ27XXX_REG_NAC] = 0x0c,
 315                 [BQ27XXX_REG_FCC] = 0x12,
 316                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 317                 [BQ27XXX_REG_AE] = 0x22,
 318                 [BQ27XXX_REG_SOC] = 0x2c,
 319                 [BQ27XXX_REG_DCAP] = 0x3c,
 320                 [BQ27XXX_REG_AP] = 0x24,
 321                 BQ27XXX_DM_REG_ROWS,
 322         },
 323         bq27520g2_regs[BQ27XXX_REG_MAX] = {
 324                 [BQ27XXX_REG_CTRL] = 0x00,
 325                 [BQ27XXX_REG_TEMP] = 0x06,
 326                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 327                 [BQ27XXX_REG_VOLT] = 0x08,
 328                 [BQ27XXX_REG_AI] = 0x14,
 329                 [BQ27XXX_REG_FLAGS] = 0x0a,
 330                 [BQ27XXX_REG_TTE] = 0x16,
 331                 [BQ27XXX_REG_TTF] = 0x18,
 332                 [BQ27XXX_REG_TTES] = 0x1c,
 333                 [BQ27XXX_REG_TTECP] = 0x26,
 334                 [BQ27XXX_REG_NAC] = 0x0c,
 335                 [BQ27XXX_REG_FCC] = 0x12,
 336                 [BQ27XXX_REG_CYCT] = 0x2a,
 337                 [BQ27XXX_REG_AE] = 0x22,
 338                 [BQ27XXX_REG_SOC] = 0x2c,
 339                 [BQ27XXX_REG_DCAP] = 0x3c,
 340                 [BQ27XXX_REG_AP] = 0x24,
 341                 BQ27XXX_DM_REG_ROWS,
 342         },
 343         bq27520g3_regs[BQ27XXX_REG_MAX] = {
 344                 [BQ27XXX_REG_CTRL] = 0x00,
 345                 [BQ27XXX_REG_TEMP] = 0x06,
 346                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 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] = 0x1c,
 353                 [BQ27XXX_REG_TTECP] = 0x26,
 354                 [BQ27XXX_REG_NAC] = 0x0c,
 355                 [BQ27XXX_REG_FCC] = 0x12,
 356                 [BQ27XXX_REG_CYCT] = 0x2a,
 357                 [BQ27XXX_REG_AE] = 0x22,
 358                 [BQ27XXX_REG_SOC] = 0x2c,
 359                 [BQ27XXX_REG_DCAP] = 0x3c,
 360                 [BQ27XXX_REG_AP] = 0x24,
 361                 BQ27XXX_DM_REG_ROWS,
 362         },
 363         bq27520g4_regs[BQ27XXX_REG_MAX] = {
 364                 [BQ27XXX_REG_CTRL] = 0x00,
 365                 [BQ27XXX_REG_TEMP] = 0x06,
 366                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 367                 [BQ27XXX_REG_VOLT] = 0x08,
 368                 [BQ27XXX_REG_AI] = 0x14,
 369                 [BQ27XXX_REG_FLAGS] = 0x0a,
 370                 [BQ27XXX_REG_TTE] = 0x16,
 371                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 372                 [BQ27XXX_REG_TTES] = 0x1c,
 373                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 374                 [BQ27XXX_REG_NAC] = 0x0c,
 375                 [BQ27XXX_REG_FCC] = 0x12,
 376                 [BQ27XXX_REG_CYCT] = 0x1e,
 377                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 378                 [BQ27XXX_REG_SOC] = 0x20,
 379                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 380                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 381                 BQ27XXX_DM_REG_ROWS,
 382         },
 383         bq27530_regs[BQ27XXX_REG_MAX] = {
 384                 [BQ27XXX_REG_CTRL] = 0x00,
 385                 [BQ27XXX_REG_TEMP] = 0x06,
 386                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 387                 [BQ27XXX_REG_VOLT] = 0x08,
 388                 [BQ27XXX_REG_AI] = 0x14,
 389                 [BQ27XXX_REG_FLAGS] = 0x0a,
 390                 [BQ27XXX_REG_TTE] = 0x16,
 391                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 392                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 393                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 394                 [BQ27XXX_REG_NAC] = 0x0c,
 395                 [BQ27XXX_REG_FCC] = 0x12,
 396                 [BQ27XXX_REG_CYCT] = 0x2a,
 397                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 398                 [BQ27XXX_REG_SOC] = 0x2c,
 399                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 400                 [BQ27XXX_REG_AP] = 0x24,
 401                 BQ27XXX_DM_REG_ROWS,
 402         },
 403 #define bq27531_regs bq27530_regs
 404         bq27541_regs[BQ27XXX_REG_MAX] = {
 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 #define bq27542_regs bq27541_regs
 425 #define bq27546_regs bq27541_regs
 426 #define bq27742_regs bq27541_regs
 427         bq27545_regs[BQ27XXX_REG_MAX] = {
 428                 [BQ27XXX_REG_CTRL] = 0x00,
 429                 [BQ27XXX_REG_TEMP] = 0x06,
 430                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 431                 [BQ27XXX_REG_VOLT] = 0x08,
 432                 [BQ27XXX_REG_AI] = 0x14,
 433                 [BQ27XXX_REG_FLAGS] = 0x0a,
 434                 [BQ27XXX_REG_TTE] = 0x16,
 435                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 436                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 437                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 438                 [BQ27XXX_REG_NAC] = 0x0c,
 439                 [BQ27XXX_REG_FCC] = 0x12,
 440                 [BQ27XXX_REG_CYCT] = 0x2a,
 441                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 442                 [BQ27XXX_REG_SOC] = 0x2c,
 443                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 444                 [BQ27XXX_REG_AP] = 0x24,
 445                 BQ27XXX_DM_REG_ROWS,
 446         },
 447         bq27421_regs[BQ27XXX_REG_MAX] = {
 448                 [BQ27XXX_REG_CTRL] = 0x00,
 449                 [BQ27XXX_REG_TEMP] = 0x02,
 450                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 451                 [BQ27XXX_REG_VOLT] = 0x04,
 452                 [BQ27XXX_REG_AI] = 0x10,
 453                 [BQ27XXX_REG_FLAGS] = 0x06,
 454                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 455                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 456                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 457                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 458                 [BQ27XXX_REG_NAC] = 0x08,
 459                 [BQ27XXX_REG_FCC] = 0x0e,
 460                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 461                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 462                 [BQ27XXX_REG_SOC] = 0x1c,
 463                 [BQ27XXX_REG_DCAP] = 0x3c,
 464                 [BQ27XXX_REG_AP] = 0x18,
 465                 BQ27XXX_DM_REG_ROWS,
 466         };
 467 #define bq27425_regs bq27421_regs
 468 #define bq27441_regs bq27421_regs
 469 #define bq27621_regs bq27421_regs
 470
 471 static enum power_supply_property bq27000_props[] = {
 472         POWER_SUPPLY_PROP_STATUS,
 473         POWER_SUPPLY_PROP_PRESENT,
 474         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 475         POWER_SUPPLY_PROP_CURRENT_NOW,
 476         POWER_SUPPLY_PROP_CAPACITY,
 477         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 478         POWER_SUPPLY_PROP_TEMP,
 479         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 480         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 481         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 482         POWER_SUPPLY_PROP_TECHNOLOGY,
 483         POWER_SUPPLY_PROP_CHARGE_FULL,
 484         POWER_SUPPLY_PROP_CHARGE_NOW,
 485         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 486         POWER_SUPPLY_PROP_CYCLE_COUNT,
 487         POWER_SUPPLY_PROP_ENERGY_NOW,
 488         POWER_SUPPLY_PROP_POWER_AVG,
 489         POWER_SUPPLY_PROP_HEALTH,
 490         POWER_SUPPLY_PROP_MANUFACTURER,
 491 };
 492
 493 static enum power_supply_property bq27010_props[] = {
 494         POWER_SUPPLY_PROP_STATUS,
 495         POWER_SUPPLY_PROP_PRESENT,
 496         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 497         POWER_SUPPLY_PROP_CURRENT_NOW,
 498         POWER_SUPPLY_PROP_CAPACITY,
 499         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 500         POWER_SUPPLY_PROP_TEMP,
 501         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 502         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 503         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 504         POWER_SUPPLY_PROP_TECHNOLOGY,
 505         POWER_SUPPLY_PROP_CHARGE_FULL,
 506         POWER_SUPPLY_PROP_CHARGE_NOW,
 507         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 508         POWER_SUPPLY_PROP_CYCLE_COUNT,
 509         POWER_SUPPLY_PROP_HEALTH,
 510         POWER_SUPPLY_PROP_MANUFACTURER,
 511 };
 512
 513 static enum power_supply_property bq2750x_props[] = {
 514         POWER_SUPPLY_PROP_STATUS,
 515         POWER_SUPPLY_PROP_PRESENT,
 516         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 517         POWER_SUPPLY_PROP_CURRENT_NOW,
 518         POWER_SUPPLY_PROP_CAPACITY,
 519         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 520         POWER_SUPPLY_PROP_TEMP,
 521         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 522         POWER_SUPPLY_PROP_TECHNOLOGY,
 523         POWER_SUPPLY_PROP_CHARGE_FULL,
 524         POWER_SUPPLY_PROP_CHARGE_NOW,
 525         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 526         POWER_SUPPLY_PROP_CYCLE_COUNT,
 527         POWER_SUPPLY_PROP_HEALTH,
 528         POWER_SUPPLY_PROP_MANUFACTURER,
 529 };
 530
 531 static enum power_supply_property bq2751x_props[] = {
 532         POWER_SUPPLY_PROP_STATUS,
 533         POWER_SUPPLY_PROP_PRESENT,
 534         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 535         POWER_SUPPLY_PROP_CURRENT_NOW,
 536         POWER_SUPPLY_PROP_CAPACITY,
 537         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 538         POWER_SUPPLY_PROP_TEMP,
 539         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 540         POWER_SUPPLY_PROP_TECHNOLOGY,
 541         POWER_SUPPLY_PROP_CHARGE_FULL,
 542         POWER_SUPPLY_PROP_CHARGE_NOW,
 543         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 544         POWER_SUPPLY_PROP_CYCLE_COUNT,
 545         POWER_SUPPLY_PROP_HEALTH,
 546         POWER_SUPPLY_PROP_MANUFACTURER,
 547 };
 548 #define bq2752x_props bq2751x_props
 549
 550 static enum power_supply_property bq27500_props[] = {
 551         POWER_SUPPLY_PROP_STATUS,
 552         POWER_SUPPLY_PROP_PRESENT,
 553         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 554         POWER_SUPPLY_PROP_CURRENT_NOW,
 555         POWER_SUPPLY_PROP_CAPACITY,
 556         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 557         POWER_SUPPLY_PROP_TEMP,
 558         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 559         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 560         POWER_SUPPLY_PROP_TECHNOLOGY,
 561         POWER_SUPPLY_PROP_CHARGE_FULL,
 562         POWER_SUPPLY_PROP_CHARGE_NOW,
 563         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 564         POWER_SUPPLY_PROP_CYCLE_COUNT,
 565         POWER_SUPPLY_PROP_ENERGY_NOW,
 566         POWER_SUPPLY_PROP_POWER_AVG,
 567         POWER_SUPPLY_PROP_HEALTH,
 568         POWER_SUPPLY_PROP_MANUFACTURER,
 569 };
 570
 571 static enum power_supply_property bq27510g1_props[] = {
 572         POWER_SUPPLY_PROP_STATUS,
 573         POWER_SUPPLY_PROP_PRESENT,
 574         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 575         POWER_SUPPLY_PROP_CURRENT_NOW,
 576         POWER_SUPPLY_PROP_CAPACITY,
 577         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 578         POWER_SUPPLY_PROP_TEMP,
 579         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 580         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 581         POWER_SUPPLY_PROP_TECHNOLOGY,
 582         POWER_SUPPLY_PROP_CHARGE_FULL,
 583         POWER_SUPPLY_PROP_CHARGE_NOW,
 584         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 585         POWER_SUPPLY_PROP_CYCLE_COUNT,
 586         POWER_SUPPLY_PROP_ENERGY_NOW,
 587         POWER_SUPPLY_PROP_POWER_AVG,
 588         POWER_SUPPLY_PROP_HEALTH,
 589         POWER_SUPPLY_PROP_MANUFACTURER,
 590 };
 591
 592 static enum power_supply_property bq27510g2_props[] = {
 593         POWER_SUPPLY_PROP_STATUS,
 594         POWER_SUPPLY_PROP_PRESENT,
 595         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 596         POWER_SUPPLY_PROP_CURRENT_NOW,
 597         POWER_SUPPLY_PROP_CAPACITY,
 598         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 599         POWER_SUPPLY_PROP_TEMP,
 600         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 601         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 602         POWER_SUPPLY_PROP_TECHNOLOGY,
 603         POWER_SUPPLY_PROP_CHARGE_FULL,
 604         POWER_SUPPLY_PROP_CHARGE_NOW,
 605         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 606         POWER_SUPPLY_PROP_CYCLE_COUNT,
 607         POWER_SUPPLY_PROP_ENERGY_NOW,
 608         POWER_SUPPLY_PROP_POWER_AVG,
 609         POWER_SUPPLY_PROP_HEALTH,
 610         POWER_SUPPLY_PROP_MANUFACTURER,
 611 };
 612
 613 static enum power_supply_property bq27510g3_props[] = {
 614         POWER_SUPPLY_PROP_STATUS,
 615         POWER_SUPPLY_PROP_PRESENT,
 616         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 617         POWER_SUPPLY_PROP_CURRENT_NOW,
 618         POWER_SUPPLY_PROP_CAPACITY,
 619         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 620         POWER_SUPPLY_PROP_TEMP,
 621         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 622         POWER_SUPPLY_PROP_TECHNOLOGY,
 623         POWER_SUPPLY_PROP_CHARGE_FULL,
 624         POWER_SUPPLY_PROP_CHARGE_NOW,
 625         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 626         POWER_SUPPLY_PROP_CYCLE_COUNT,
 627         POWER_SUPPLY_PROP_HEALTH,
 628         POWER_SUPPLY_PROP_MANUFACTURER,
 629 };
 630
 631 static enum power_supply_property bq27520g1_props[] = {
 632         POWER_SUPPLY_PROP_STATUS,
 633         POWER_SUPPLY_PROP_PRESENT,
 634         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 635         POWER_SUPPLY_PROP_CURRENT_NOW,
 636         POWER_SUPPLY_PROP_CAPACITY,
 637         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 638         POWER_SUPPLY_PROP_TEMP,
 639         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 640         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 641         POWER_SUPPLY_PROP_TECHNOLOGY,
 642         POWER_SUPPLY_PROP_CHARGE_FULL,
 643         POWER_SUPPLY_PROP_CHARGE_NOW,
 644         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 645         POWER_SUPPLY_PROP_ENERGY_NOW,
 646         POWER_SUPPLY_PROP_POWER_AVG,
 647         POWER_SUPPLY_PROP_HEALTH,
 648         POWER_SUPPLY_PROP_MANUFACTURER,
 649 };
 650
 651 static enum power_supply_property bq27520g2_props[] = {
 652         POWER_SUPPLY_PROP_STATUS,
 653         POWER_SUPPLY_PROP_PRESENT,
 654         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 655         POWER_SUPPLY_PROP_CURRENT_NOW,
 656         POWER_SUPPLY_PROP_CAPACITY,
 657         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 658         POWER_SUPPLY_PROP_TEMP,
 659         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 660         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 661         POWER_SUPPLY_PROP_TECHNOLOGY,
 662         POWER_SUPPLY_PROP_CHARGE_FULL,
 663         POWER_SUPPLY_PROP_CHARGE_NOW,
 664         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 665         POWER_SUPPLY_PROP_CYCLE_COUNT,
 666         POWER_SUPPLY_PROP_ENERGY_NOW,
 667         POWER_SUPPLY_PROP_POWER_AVG,
 668         POWER_SUPPLY_PROP_HEALTH,
 669         POWER_SUPPLY_PROP_MANUFACTURER,
 670 };
 671
 672 static enum power_supply_property bq27520g3_props[] = {
 673         POWER_SUPPLY_PROP_STATUS,
 674         POWER_SUPPLY_PROP_PRESENT,
 675         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 676         POWER_SUPPLY_PROP_CURRENT_NOW,
 677         POWER_SUPPLY_PROP_CAPACITY,
 678         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 679         POWER_SUPPLY_PROP_TEMP,
 680         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 681         POWER_SUPPLY_PROP_TECHNOLOGY,
 682         POWER_SUPPLY_PROP_CHARGE_FULL,
 683         POWER_SUPPLY_PROP_CHARGE_NOW,
 684         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 685         POWER_SUPPLY_PROP_CYCLE_COUNT,
 686         POWER_SUPPLY_PROP_ENERGY_NOW,
 687         POWER_SUPPLY_PROP_POWER_AVG,
 688         POWER_SUPPLY_PROP_HEALTH,
 689         POWER_SUPPLY_PROP_MANUFACTURER,
 690 };
 691
 692 static enum power_supply_property bq27520g4_props[] = {
 693         POWER_SUPPLY_PROP_STATUS,
 694         POWER_SUPPLY_PROP_PRESENT,
 695         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 696         POWER_SUPPLY_PROP_CURRENT_NOW,
 697         POWER_SUPPLY_PROP_CAPACITY,
 698         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 699         POWER_SUPPLY_PROP_TEMP,
 700         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 701         POWER_SUPPLY_PROP_TECHNOLOGY,
 702         POWER_SUPPLY_PROP_CHARGE_FULL,
 703         POWER_SUPPLY_PROP_CHARGE_NOW,
 704         POWER_SUPPLY_PROP_CYCLE_COUNT,
 705         POWER_SUPPLY_PROP_HEALTH,
 706         POWER_SUPPLY_PROP_MANUFACTURER,
 707 };
 708
 709 static enum power_supply_property bq27530_props[] = {
 710         POWER_SUPPLY_PROP_STATUS,
 711         POWER_SUPPLY_PROP_PRESENT,
 712         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 713         POWER_SUPPLY_PROP_CURRENT_NOW,
 714         POWER_SUPPLY_PROP_CAPACITY,
 715         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 716         POWER_SUPPLY_PROP_TEMP,
 717         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 718         POWER_SUPPLY_PROP_TECHNOLOGY,
 719         POWER_SUPPLY_PROP_CHARGE_FULL,
 720         POWER_SUPPLY_PROP_CHARGE_NOW,
 721         POWER_SUPPLY_PROP_POWER_AVG,
 722         POWER_SUPPLY_PROP_HEALTH,
 723         POWER_SUPPLY_PROP_CYCLE_COUNT,
 724         POWER_SUPPLY_PROP_MANUFACTURER,
 725 };
 726 #define bq27531_props bq27530_props
 727
 728 static enum power_supply_property bq27541_props[] = {
 729         POWER_SUPPLY_PROP_STATUS,
 730         POWER_SUPPLY_PROP_PRESENT,
 731         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 732         POWER_SUPPLY_PROP_CURRENT_NOW,
 733         POWER_SUPPLY_PROP_CAPACITY,
 734         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 735         POWER_SUPPLY_PROP_TEMP,
 736         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 737         POWER_SUPPLY_PROP_TECHNOLOGY,
 738         POWER_SUPPLY_PROP_CHARGE_FULL,
 739         POWER_SUPPLY_PROP_CHARGE_NOW,
 740         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 741         POWER_SUPPLY_PROP_CYCLE_COUNT,
 742         POWER_SUPPLY_PROP_POWER_AVG,
 743         POWER_SUPPLY_PROP_HEALTH,
 744         POWER_SUPPLY_PROP_MANUFACTURER,
 745 };
 746 #define bq27542_props bq27541_props
 747 #define bq27546_props bq27541_props
 748 #define bq27742_props bq27541_props
 749
 750 static enum power_supply_property bq27545_props[] = {
 751         POWER_SUPPLY_PROP_STATUS,
 752         POWER_SUPPLY_PROP_PRESENT,
 753         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 754         POWER_SUPPLY_PROP_CURRENT_NOW,
 755         POWER_SUPPLY_PROP_CAPACITY,
 756         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 757         POWER_SUPPLY_PROP_TEMP,
 758         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 759         POWER_SUPPLY_PROP_TECHNOLOGY,
 760         POWER_SUPPLY_PROP_CHARGE_FULL,
 761         POWER_SUPPLY_PROP_CHARGE_NOW,
 762         POWER_SUPPLY_PROP_HEALTH,
 763         POWER_SUPPLY_PROP_CYCLE_COUNT,
 764         POWER_SUPPLY_PROP_POWER_AVG,
 765         POWER_SUPPLY_PROP_MANUFACTURER,
 766 };
 767
 768 static enum power_supply_property bq27421_props[] = {
 769         POWER_SUPPLY_PROP_STATUS,
 770         POWER_SUPPLY_PROP_PRESENT,
 771         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 772         POWER_SUPPLY_PROP_CURRENT_NOW,
 773         POWER_SUPPLY_PROP_CAPACITY,
 774         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 775         POWER_SUPPLY_PROP_TEMP,
 776         POWER_SUPPLY_PROP_TECHNOLOGY,
 777         POWER_SUPPLY_PROP_CHARGE_FULL,
 778         POWER_SUPPLY_PROP_CHARGE_NOW,
 779         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 780         POWER_SUPPLY_PROP_MANUFACTURER,
 781 };
 782 #define bq27425_props bq27421_props
 783 #define bq27441_props bq27421_props
 784 #define bq27621_props bq27421_props
 785
 786 struct bq27xxx_dm_reg {
 787         u8 subclass_id;
 788         u8 offset;
 789         u8 bytes;
 790         u16 min, max;
 791 };
 792
 793 enum bq27xxx_dm_reg_id {
 794         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 795         BQ27XXX_DM_DESIGN_ENERGY,
 796         BQ27XXX_DM_TERMINATE_VOLTAGE,
 797 };
 798
 799 #define bq27000_dm_regs 0
 800 #define bq27010_dm_regs 0
 801 #define bq2750x_dm_regs 0
 802 #define bq2751x_dm_regs 0
 803 #define bq2752x_dm_regs 0
 804
 805 #if 0 /* not yet tested */
 806 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 807         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 10, 2,    0, 65535 },
 808         [BQ27XXX_DM_DESIGN_ENERGY]     = { }, /* missing on chip */
 809         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
 810 };
 811 #else
 812 #define bq27500_dm_regs 0
 813 #endif
 814
 815 /* todo create data memory definitions from datasheets and test on chips */
 816 #define bq27510g1_dm_regs 0
 817 #define bq27510g2_dm_regs 0
 818 #define bq27510g3_dm_regs 0
 819 #define bq27520g1_dm_regs 0
 820 #define bq27520g2_dm_regs 0
 821 #define bq27520g3_dm_regs 0
 822 #define bq27520g4_dm_regs 0
 823 #define bq27530_dm_regs 0
 824 #define bq27531_dm_regs 0
 825 #define bq27541_dm_regs 0
 826 #define bq27542_dm_regs 0
 827 #define bq27546_dm_regs 0
 828 #define bq27742_dm_regs 0
 829
 830 #if 0 /* not yet tested */
 831 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
 832         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 23, 2,    0, 32767 },
 833         [BQ27XXX_DM_DESIGN_ENERGY]     = { 48, 25, 2,    0, 32767 },
 834         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800,  3700 },
 835 };
 836 #else
 837 #define bq27545_dm_regs 0
 838 #endif
 839
 840 #if 0 /* not yet tested */
 841 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
 842         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0,  8000 },
 843         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 844         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500,  3700 },
 845 };
 846 #else
 847 #define bq27421_dm_regs 0
 848 #endif
 849
 850 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
 851         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 12, 2,    0, 32767 },
 852         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 14, 2,    0, 32767 },
 853         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800,  3700 },
 854 };
 855
 856 #if 0 /* not yet tested */
 857 #define bq27441_dm_regs bq27421_dm_regs
 858 #else
 859 #define bq27441_dm_regs 0
 860 #endif
 861
 862 #if 0 /* not yet tested */
 863 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 864         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 3, 2,    0,  8000 },
 865         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 5, 2,    0, 32767 },
 866         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500,  3700 },
 867 };
 868 #else
 869 #define bq27621_dm_regs 0
 870 #endif
 871
 872 #define BQ27XXX_O_ZERO  0x00000001
 873 #define BQ27XXX_O_OTDC  0x00000002
 874 #define BQ27XXX_O_UTOT  0x00000004
 875 #define BQ27XXX_O_CFGUP 0x00000008
 876 #define BQ27XXX_O_RAM   0x00000010
 877
 878 #define BQ27XXX_DATA(ref, key, opt) {           \
 879         .opts = (opt),                          \
 880         .unseal_key = key,                      \
 881         .regs  = ref##_regs,                    \
 882         .dm_regs = ref##_dm_regs,               \
 883         .props = ref##_props,                   \
 884         .props_size = ARRAY_SIZE(ref##_props) }
 885
 886 static struct {
 887         u32 opts;
 888         u32 unseal_key;
 889         u8 *regs;
 890         struct bq27xxx_dm_reg *dm_regs;
 891         enum power_supply_property *props;
 892         size_t props_size;
 893 } bq27xxx_chip_data[] = {
 894         [BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO),
 895         [BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO),
 896         [BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 897         [BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 898         [BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
 899         [BQ27500]   = BQ27XXX_DATA(bq27500,   0x04143672, BQ27XXX_O_OTDC),
 900         [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0         , BQ27XXX_O_OTDC),
 901         [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0         , BQ27XXX_O_OTDC),
 902         [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0         , BQ27XXX_O_OTDC),
 903         [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0         , BQ27XXX_O_OTDC),
 904         [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 905         [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 906         [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
 907         [BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 908         [BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
 909         [BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
 910         [BQ27542]   = BQ27XXX_DATA(bq27542,   0         , BQ27XXX_O_OTDC),
 911         [BQ27546]   = BQ27XXX_DATA(bq27546,   0         , BQ27XXX_O_OTDC),
 912         [BQ27742]   = BQ27XXX_DATA(bq27742,   0         , BQ27XXX_O_OTDC),
 913         [BQ27545]   = BQ27XXX_DATA(bq27545,   0x04143672, BQ27XXX_O_OTDC),
 914         [BQ27421]   = BQ27XXX_DATA(bq27421,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 915         [BQ27425]   = BQ27XXX_DATA(bq27425,   0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
 916         [BQ27441]   = BQ27XXX_DATA(bq27441,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 917         [BQ27621]   = BQ27XXX_DATA(bq27621,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 918 };
 919
 920 static DEFINE_MUTEX(bq27xxx_list_lock);
 921 static LIST_HEAD(bq27xxx_battery_devices);
 922
 923 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
 924
 925 #define BQ27XXX_DM_SZ   32
 926
 927 /**
 928  * struct bq27xxx_dm_buf - chip data memory buffer
 929  * @class: data memory subclass_id
 930  * @block: data memory block number
 931  * @data: data from/for the block
 932  * @has_data: true if data has been filled by read
 933  * @dirty: true if data has changed since last read/write
 934  *
 935  * Encapsulates info required to manage chip data memory blocks.
 936  */
 937 struct bq27xxx_dm_buf {
 938         u8 class;
 939         u8 block;
 940         u8 data[BQ27XXX_DM_SZ];
 941         bool has_data, dirty;
 942 };
 943
 944 #define BQ27XXX_DM_BUF(di, i) { \
 945         .class = (di)->dm_regs[i].subclass_id, \
 946         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
 947 }
 948
 949 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
 950                                       struct bq27xxx_dm_reg *reg)
 951 {
 952         if (buf->class == reg->subclass_id &&
 953             buf->block == reg->offset / BQ27XXX_DM_SZ)
 954                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
 955
 956         return NULL;
 957 }
 958
 959 static const char * const bq27xxx_dm_reg_name[] = {
 960         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
 961         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
 962         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
 963 };
 964
 965
 966 static bool bq27xxx_dt_to_nvm = true;
 967 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
 968 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
 969         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
 970         "Users must set this =0 when installing a different type of battery!\n"
 971         "Default is =1."
 972 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
 973         "\nSetting this affects future kernel updates, not the current configuration."
 974 #endif
 975 );
 976
 977 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
 978 {
 979         struct bq27xxx_device_info *di;
 980         unsigned int prev_val = *(unsigned int *) kp->arg;
 981         int ret;
 982
 983         ret = param_set_uint(val, kp);
 984         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
 985                 return ret;
 986
 987         mutex_lock(&bq27xxx_list_lock);
 988         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
 989                 cancel_delayed_work_sync(&di->work);
 990                 schedule_delayed_work(&di->work, 0);
 991         }
 992         mutex_unlock(&bq27xxx_list_lock);
 993
 994         return ret;
 995 }
 996
 997 static const struct kernel_param_ops param_ops_poll_interval = {
 998         .get = param_get_uint,
 999         .set = poll_interval_param_set,
1000 };
1001
1002 static unsigned int poll_interval = 360;
1003 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
1004 MODULE_PARM_DESC(poll_interval,
1005                  "battery poll interval in seconds - 0 disables polling");
1006
1007 /*
1008  * Common code for BQ27xxx devices
1009  */
1010
1011 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
1012                                bool single)
1013 {
1014         int ret;
1015
1016         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1017                 return -EINVAL;
1018
1019         ret = di->bus.read(di, di->regs[reg_index], single);
1020         if (ret < 0)
1021                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
1022                         di->regs[reg_index], reg_index);
1023
1024         return ret;
1025 }
1026
1027 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
1028                                 u16 value, bool single)
1029 {
1030         int ret;
1031
1032         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1033                 return -EINVAL;
1034
1035         if (!di->bus.write)
1036                 return -EPERM;
1037
1038         ret = di->bus.write(di, di->regs[reg_index], value, single);
1039         if (ret < 0)
1040                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
1041                         di->regs[reg_index], reg_index);
1042
1043         return ret;
1044 }
1045
1046 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
1047                                      u8 *data, int len)
1048 {
1049         int ret;
1050
1051         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1052                 return -EINVAL;
1053
1054         if (!di->bus.read_bulk)
1055                 return -EPERM;
1056
1057         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
1058         if (ret < 0)
1059                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
1060                         di->regs[reg_index], reg_index);
1061
1062         return ret;
1063 }
1064
1065 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
1066                                       u8 *data, int len)
1067 {
1068         int ret;
1069
1070         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1071                 return -EINVAL;
1072
1073         if (!di->bus.write_bulk)
1074                 return -EPERM;
1075
1076         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
1077         if (ret < 0)
1078                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
1079                         di->regs[reg_index], reg_index);
1080
1081         return ret;
1082 }
1083
1084 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
1085 {
1086         int ret;
1087
1088         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
1089         if (ret < 0) {
1090                 dev_err(di->dev, "bus error on seal: %d\n", ret);
1091                 return ret;
1092         }
1093
1094         return 0;
1095 }
1096
1097 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
1098 {
1099         int ret;
1100
1101         if (di->unseal_key == 0) {
1102                 dev_err(di->dev, "unseal failed due to missing key\n");
1103                 return -EINVAL;
1104         }
1105
1106         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1107         if (ret < 0)
1108                 goto out;
1109
1110         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1111         if (ret < 0)
1112                 goto out;
1113
1114         return 0;
1115
1116 out:
1117         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1118         return ret;
1119 }
1120
1121 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1122 {
1123         u16 sum = 0;
1124         int i;
1125
1126         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1127                 sum += buf->data[i];
1128         sum &= 0xff;
1129
1130         return 0xff - sum;
1131 }
1132
1133 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1134                                          struct bq27xxx_dm_buf *buf)
1135 {
1136         int ret;
1137
1138         buf->has_data = false;
1139
1140         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1141         if (ret < 0)
1142                 goto out;
1143
1144         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1145         if (ret < 0)
1146                 goto out;
1147
1148         BQ27XXX_MSLEEP(1);
1149
1150         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1151         if (ret < 0)
1152                 goto out;
1153
1154         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1155         if (ret < 0)
1156                 goto out;
1157
1158         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1159                 ret = -EINVAL;
1160                 goto out;
1161         }
1162
1163         buf->has_data = true;
1164         buf->dirty = false;
1165
1166         return 0;
1167
1168 out:
1169         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1170         return ret;
1171 }
1172
1173 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1174                                             struct bq27xxx_dm_buf *buf,
1175                                             enum bq27xxx_dm_reg_id reg_id,
1176                                             unsigned int val)
1177 {
1178         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1179         const char *str = bq27xxx_dm_reg_name[reg_id];
1180         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1181
1182         if (prev == NULL) {
1183                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1184                 return;
1185         }
1186
1187         if (reg->bytes != 2) {
1188                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1189                 return;
1190         }
1191
1192         if (!buf->has_data)
1193                 return;
1194
1195         if (be16_to_cpup(prev) == val) {
1196                 dev_info(di->dev, "%s has %u\n", str, val);
1197                 return;
1198         }
1199
1200 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1201         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1202 #else
1203         if (!(di->opts & BQ27XXX_O_RAM)) {
1204 #endif
1205                 /* devicetree and NVM differ; defer to NVM */
1206                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1207 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1208                          "by dt_monitored_battery_updates_nvm=0"
1209 #else
1210                          "for flash/NVM data memory"
1211 #endif
1212                          "\n", str, be16_to_cpup(prev), val);
1213                 return;
1214         }
1215
1216         dev_info(di->dev, "update %s to %u\n", str, val);
1217
1218         *prev = cpu_to_be16(val);
1219         buf->dirty = true;
1220 }
1221
1222 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1223 {
1224         const int limit = 100;
1225         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1226         int ret, try = limit;
1227
1228         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1229         if (ret < 0)
1230                 return ret;
1231
1232         do {
1233                 BQ27XXX_MSLEEP(25);
1234                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1235                 if (ret < 0)
1236                         return ret;
1237         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1238
1239         if (!try && di->chip != BQ27425) { // 425 has a bug
1240                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1241                 return -EINVAL;
1242         }
1243
1244         if (limit - try > 3)
1245                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1246
1247         return 0;
1248 }
1249
1250 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1251 {
1252         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1253         if (ret < 0 && ret != -EINVAL)
1254                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1255
1256         return ret;
1257 }
1258
1259 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1260 {
1261         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1262         if (ret < 0 && ret != -EINVAL)
1263                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1264
1265         return ret;
1266 }
1267
1268 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1269                                           struct bq27xxx_dm_buf *buf)
1270 {
1271         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1272         int ret;
1273
1274         if (!buf->dirty)
1275                 return 0;
1276
1277         if (cfgup) {
1278                 ret = bq27xxx_battery_set_cfgupdate(di);
1279                 if (ret < 0)
1280                         return ret;
1281         }
1282
1283         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1284         if (ret < 0)
1285                 goto out;
1286
1287         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1288         if (ret < 0)
1289                 goto out;
1290
1291         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1292         if (ret < 0)
1293                 goto out;
1294
1295         BQ27XXX_MSLEEP(1);
1296
1297         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1298         if (ret < 0)
1299                 goto out;
1300
1301         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1302                             bq27xxx_battery_checksum_dm_block(buf), true);
1303         if (ret < 0)
1304                 goto out;
1305
1306         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1307          * corruption on the '425 chip (and perhaps others), which can damage
1308          * the chip.
1309          */
1310
1311         if (cfgup) {
1312                 BQ27XXX_MSLEEP(1);
1313                 ret = bq27xxx_battery_soft_reset(di);
1314                 if (ret < 0)
1315                         return ret;
1316         } else {
1317                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1318         }
1319
1320         buf->dirty = false;
1321
1322         return 0;
1323
1324 out:
1325         if (cfgup)
1326                 bq27xxx_battery_soft_reset(di);
1327
1328         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1329         return ret;
1330 }
1331
1332 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1333                                        struct power_supply_battery_info *info)
1334 {
1335         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1336         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1337         bool updated;
1338
1339         if (bq27xxx_battery_unseal(di) < 0)
1340                 return;
1341
1342         if (info->charge_full_design_uah != -EINVAL &&
1343             info->energy_full_design_uwh != -EINVAL) {
1344                 bq27xxx_battery_read_dm_block(di, &bd);
1345                 /* assume design energy & capacity are in same block */
1346                 bq27xxx_battery_update_dm_block(di, &bd,
1347                                         BQ27XXX_DM_DESIGN_CAPACITY,
1348                                         info->charge_full_design_uah / 1000);
1349                 bq27xxx_battery_update_dm_block(di, &bd,
1350                                         BQ27XXX_DM_DESIGN_ENERGY,
1351                                         info->energy_full_design_uwh / 1000);
1352         }
1353
1354         if (info->voltage_min_design_uv != -EINVAL) {
1355                 bool same = bd.class == bt.class && bd.block == bt.block;
1356                 if (!same)
1357                         bq27xxx_battery_read_dm_block(di, &bt);
1358                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1359                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1360                                         info->voltage_min_design_uv / 1000);
1361         }
1362
1363         updated = bd.dirty || bt.dirty;
1364
1365         bq27xxx_battery_write_dm_block(di, &bd);
1366         bq27xxx_battery_write_dm_block(di, &bt);
1367
1368         bq27xxx_battery_seal(di);
1369
1370         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1371                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1372                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1373         }
1374         /* assume bq27xxx_battery_update() is called hereafter */
1375 }
1376
1377 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1378 {
1379         struct power_supply_battery_info info = {};
1380         unsigned int min, max;
1381
1382         if (power_supply_get_battery_info(di->bat, &info) < 0)
1383                 return;
1384
1385         if (!di->dm_regs) {
1386                 dev_warn(di->dev, "data memory update not supported for chip\n");
1387                 return;
1388         }
1389
1390         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1391                 if (info.energy_full_design_uwh == -EINVAL)
1392                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1393                 else if (info.charge_full_design_uah == -EINVAL)
1394                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1395         }
1396
1397         /* assume min == 0 */
1398         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1399         if (info.energy_full_design_uwh > max * 1000) {
1400                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1401                         info.energy_full_design_uwh);
1402                 info.energy_full_design_uwh = -EINVAL;
1403         }
1404
1405         /* assume min == 0 */
1406         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1407         if (info.charge_full_design_uah > max * 1000) {
1408                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1409                         info.charge_full_design_uah);
1410                 info.charge_full_design_uah = -EINVAL;
1411         }
1412
1413         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1414         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1415         if ((info.voltage_min_design_uv < min * 1000 ||
1416              info.voltage_min_design_uv > max * 1000) &&
1417              info.voltage_min_design_uv != -EINVAL) {
1418                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1419                         info.voltage_min_design_uv);
1420                 info.voltage_min_design_uv = -EINVAL;
1421         }
1422
1423         if ((info.energy_full_design_uwh != -EINVAL &&
1424              info.charge_full_design_uah != -EINVAL) ||
1425              info.voltage_min_design_uv  != -EINVAL)
1426                 bq27xxx_battery_set_config(di, &info);
1427 }
1428
1429 /*
1430  * Return the battery State-of-Charge
1431  * Or < 0 if something fails.
1432  */
1433 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1434 {
1435         int soc;
1436
1437         if (di->opts & BQ27XXX_O_ZERO)
1438                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1439         else
1440                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1441
1442         if (soc < 0)
1443                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1444
1445         return soc;
1446 }
1447
1448 /*
1449  * Return a battery charge value in µAh
1450  * Or < 0 if something fails.
1451  */
1452 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1453 {
1454         int charge;
1455
1456         charge = bq27xxx_read(di, reg, false);
1457         if (charge < 0) {
1458                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1459                         reg, charge);
1460                 return charge;
1461         }
1462
1463         if (di->opts & BQ27XXX_O_ZERO)
1464                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1465         else
1466                 charge *= 1000;
1467
1468         return charge;
1469 }
1470
1471 /*
1472  * Return the battery Nominal available capacity in µAh
1473  * Or < 0 if something fails.
1474  */
1475 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1476 {
1477         int flags;
1478
1479         if (di->opts & BQ27XXX_O_ZERO) {
1480                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1481                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1482                         return -ENODATA;
1483         }
1484
1485         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1486 }
1487
1488 /*
1489  * Return the battery Full Charge Capacity in µAh
1490  * Or < 0 if something fails.
1491  */
1492 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1493 {
1494         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1495 }
1496
1497 /*
1498  * Return the Design Capacity in µAh
1499  * Or < 0 if something fails.
1500  */
1501 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1502 {
1503         int dcap;
1504
1505         if (di->opts & BQ27XXX_O_ZERO)
1506                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1507         else
1508                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1509
1510         if (dcap < 0) {
1511                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1512                 return dcap;
1513         }
1514
1515         if (di->opts & BQ27XXX_O_ZERO)
1516                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1517         else
1518                 dcap *= 1000;
1519
1520         return dcap;
1521 }
1522
1523 /*
1524  * Return the battery Available energy in µWh
1525  * Or < 0 if something fails.
1526  */
1527 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1528 {
1529         int ae;
1530
1531         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1532         if (ae < 0) {
1533                 dev_dbg(di->dev, "error reading available energy\n");
1534                 return ae;
1535         }
1536
1537         if (di->opts & BQ27XXX_O_ZERO)
1538                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1539         else
1540                 ae *= 1000;
1541
1542         return ae;
1543 }
1544
1545 /*
1546  * Return the battery temperature in tenths of degree Kelvin
1547  * Or < 0 if something fails.
1548  */
1549 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1550 {
1551         int temp;
1552
1553         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1554         if (temp < 0) {
1555                 dev_err(di->dev, "error reading temperature\n");
1556                 return temp;
1557         }
1558
1559         if (di->opts & BQ27XXX_O_ZERO)
1560                 temp = 5 * temp / 2;
1561
1562         return temp;
1563 }
1564
1565 /*
1566  * Return the battery Cycle count total
1567  * Or < 0 if something fails.
1568  */
1569 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1570 {
1571         int cyct;
1572
1573         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1574         if (cyct < 0)
1575                 dev_err(di->dev, "error reading cycle count total\n");
1576
1577         return cyct;
1578 }
1579
1580 /*
1581  * Read a time register.
1582  * Return < 0 if something fails.
1583  */
1584 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1585 {
1586         int tval;
1587
1588         tval = bq27xxx_read(di, reg, false);
1589         if (tval < 0) {
1590                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1591                         reg, tval);
1592                 return tval;
1593         }
1594
1595         if (tval == 65535)
1596                 return -ENODATA;
1597
1598         return tval * 60;
1599 }
1600
1601 /*
1602  * Read an average power register.
1603  * Return < 0 if something fails.
1604  */
1605 static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
1606 {
1607         int tval;
1608
1609         tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1610         if (tval < 0) {
1611                 dev_err(di->dev, "error reading average power register  %02x: %d\n",
1612                         BQ27XXX_REG_AP, tval);
1613                 return tval;
1614         }
1615
1616         if (di->opts & BQ27XXX_O_ZERO)
1617                 return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1618         else
1619                 return tval;
1620 }
1621
1622 /*
1623  * Returns true if a battery over temperature condition is detected
1624  */
1625 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1626 {
1627         if (di->opts & BQ27XXX_O_OTDC)
1628                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1629         if (di->opts & BQ27XXX_O_UTOT)
1630                 return flags & BQ27XXX_FLAG_OT;
1631
1632         return false;
1633 }
1634
1635 /*
1636  * Returns true if a battery under temperature condition is detected
1637  */
1638 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1639 {
1640         if (di->opts & BQ27XXX_O_UTOT)
1641                 return flags & BQ27XXX_FLAG_UT;
1642
1643         return false;
1644 }
1645
1646 /*
1647  * Returns true if a low state of charge condition is detected
1648  */
1649 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1650 {
1651         if (di->opts & BQ27XXX_O_ZERO)
1652                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1653         else
1654                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1655 }
1656
1657 /*
1658  * Read flag register.
1659  * Return < 0 if something fails.
1660  */
1661 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1662 {
1663         int flags;
1664         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1665
1666         flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1667         if (flags < 0) {
1668                 dev_err(di->dev, "error reading flag register:%d\n", flags);
1669                 return flags;
1670         }
1671
1672         /* Unlikely but important to return first */
1673         if (unlikely(bq27xxx_battery_overtemp(di, flags)))
1674                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1675         if (unlikely(bq27xxx_battery_undertemp(di, flags)))
1676                 return POWER_SUPPLY_HEALTH_COLD;
1677         if (unlikely(bq27xxx_battery_dead(di, flags)))
1678                 return POWER_SUPPLY_HEALTH_DEAD;
1679
1680         return POWER_SUPPLY_HEALTH_GOOD;
1681 }
1682
1683 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1684 {
1685         struct bq27xxx_reg_cache cache = {0, };
1686         bool has_ci_flag = di->opts & BQ27XXX_O_ZERO;
1687         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1688
1689         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1690         if ((cache.flags & 0xff) == 0xff)
1691                 cache.flags = -1; /* read error */
1692         if (cache.flags >= 0) {
1693                 cache.temperature = bq27xxx_battery_read_temperature(di);
1694                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1695                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1696                         cache.capacity = -ENODATA;
1697                         cache.energy = -ENODATA;
1698                         cache.time_to_empty = -ENODATA;
1699                         cache.time_to_empty_avg = -ENODATA;
1700                         cache.time_to_full = -ENODATA;
1701                         cache.charge_full = -ENODATA;
1702                         cache.health = -ENODATA;
1703                 } else {
1704                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1705                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1706                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1707                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1708                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1709                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1710                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1711                         cache.capacity = bq27xxx_battery_read_soc(di);
1712                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1713                                 cache.energy = bq27xxx_battery_read_energy(di);
1714                         cache.health = bq27xxx_battery_read_health(di);
1715                 }
1716                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1717                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1718                 if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
1719                         cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
1720
1721                 /* We only have to read charge design full once */
1722                 if (di->charge_design_full <= 0)
1723                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1724         }
1725
1726         if (di->cache.capacity != cache.capacity)
1727                 power_supply_changed(di->bat);
1728
1729         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1730                 di->cache = cache;
1731
1732         di->last_update = jiffies;
1733 }
1734 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1735
1736 static void bq27xxx_battery_poll(struct work_struct *work)
1737 {
1738         struct bq27xxx_device_info *di =
1739                         container_of(work, struct bq27xxx_device_info,
1740                                      work.work);
1741
1742         bq27xxx_battery_update(di);
1743
1744         if (poll_interval > 0)
1745                 schedule_delayed_work(&di->work, poll_interval * HZ);
1746 }
1747
1748 /*
1749  * Return the battery average current in µA
1750  * Note that current can be negative signed as well
1751  * Or 0 if something fails.
1752  */
1753 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1754                                    union power_supply_propval *val)
1755 {
1756         int curr;
1757         int flags;
1758
1759         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1760         if (curr < 0) {
1761                 dev_err(di->dev, "error reading current\n");
1762                 return curr;
1763         }
1764
1765         if (di->opts & BQ27XXX_O_ZERO) {
1766                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1767                 if (flags & BQ27000_FLAG_CHGS) {
1768                         dev_dbg(di->dev, "negative current!\n");
1769                         curr = -curr;
1770                 }
1771
1772                 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1773         } else {
1774                 /* Other gauges return signed value */
1775                 val->intval = (int)((s16)curr) * 1000;
1776         }
1777
1778         return 0;
1779 }
1780
1781 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1782                                   union power_supply_propval *val)
1783 {
1784         int status;
1785
1786         if (di->opts & BQ27XXX_O_ZERO) {
1787                 if (di->cache.flags & BQ27000_FLAG_FC)
1788                         status = POWER_SUPPLY_STATUS_FULL;
1789                 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1790                         status = POWER_SUPPLY_STATUS_CHARGING;
1791                 else if (power_supply_am_i_supplied(di->bat))
1792                         status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1793                 else
1794                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1795         } else {
1796                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1797                         status = POWER_SUPPLY_STATUS_FULL;
1798                 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1799                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1800                 else
1801                         status = POWER_SUPPLY_STATUS_CHARGING;
1802         }
1803
1804         val->intval = status;
1805
1806         return 0;
1807 }
1808
1809 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1810                                           union power_supply_propval *val)
1811 {
1812         int level;
1813
1814         if (di->opts & BQ27XXX_O_ZERO) {
1815                 if (di->cache.flags & BQ27000_FLAG_FC)
1816                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1817                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1818                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1819                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1820                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1821                 else
1822                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1823         } else {
1824                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1825                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1826                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1827                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1828                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1829                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1830                 else
1831                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1832         }
1833
1834         val->intval = level;
1835
1836         return 0;
1837 }
1838
1839 /*
1840  * Return the battery Voltage in millivolts
1841  * Or < 0 if something fails.
1842  */
1843 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1844                                    union power_supply_propval *val)
1845 {
1846         int volt;
1847
1848         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1849         if (volt < 0) {
1850                 dev_err(di->dev, "error reading voltage\n");
1851                 return volt;
1852         }
1853
1854         val->intval = volt * 1000;
1855
1856         return 0;
1857 }
1858
1859 static int bq27xxx_simple_value(int value,
1860                                 union power_supply_propval *val)
1861 {
1862         if (value < 0)
1863                 return value;
1864
1865         val->intval = value;
1866
1867         return 0;
1868 }
1869
1870 static int bq27xxx_battery_get_property(struct power_supply *psy,
1871                                         enum power_supply_property psp,
1872                                         union power_supply_propval *val)
1873 {
1874         int ret = 0;
1875         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1876
1877         mutex_lock(&di->lock);
1878         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1879                 cancel_delayed_work_sync(&di->work);
1880                 bq27xxx_battery_poll(&di->work.work);
1881         }
1882         mutex_unlock(&di->lock);
1883
1884         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1885                 return -ENODEV;
1886
1887         switch (psp) {
1888         case POWER_SUPPLY_PROP_STATUS:
1889                 ret = bq27xxx_battery_status(di, val);
1890                 break;
1891         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1892                 ret = bq27xxx_battery_voltage(di, val);
1893                 break;
1894         case POWER_SUPPLY_PROP_PRESENT:
1895                 val->intval = di->cache.flags < 0 ? 0 : 1;
1896                 break;
1897         case POWER_SUPPLY_PROP_CURRENT_NOW:
1898                 ret = bq27xxx_battery_current(di, val);
1899                 break;
1900         case POWER_SUPPLY_PROP_CAPACITY:
1901                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1902                 break;
1903         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1904                 ret = bq27xxx_battery_capacity_level(di, val);
1905                 break;
1906         case POWER_SUPPLY_PROP_TEMP:
1907                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1908                 if (ret == 0)
1909                         val->intval -= 2731; /* convert decidegree k to c */
1910                 break;
1911         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1912                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1913                 break;
1914         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1915                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1916                 break;
1917         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1918                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1919                 break;
1920         case POWER_SUPPLY_PROP_TECHNOLOGY:
1921                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1922                 break;
1923         case POWER_SUPPLY_PROP_CHARGE_NOW:
1924                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1925                 break;
1926         case POWER_SUPPLY_PROP_CHARGE_FULL:
1927                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1928                 break;
1929         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1930                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1931                 break;
1932         /*
1933          * TODO: Implement these to make registers set from
1934          * power_supply_battery_info visible in sysfs.
1935          */
1936         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1937         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1938                 return -EINVAL;
1939         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1940                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1941                 break;
1942         case POWER_SUPPLY_PROP_ENERGY_NOW:
1943                 ret = bq27xxx_simple_value(di->cache.energy, val);
1944                 break;
1945         case POWER_SUPPLY_PROP_POWER_AVG:
1946                 ret = bq27xxx_simple_value(di->cache.power_avg, val);
1947                 break;
1948         case POWER_SUPPLY_PROP_HEALTH:
1949                 ret = bq27xxx_simple_value(di->cache.health, val);
1950                 break;
1951         case POWER_SUPPLY_PROP_MANUFACTURER:
1952                 val->strval = BQ27XXX_MANUFACTURER;
1953                 break;
1954         default:
1955                 return -EINVAL;
1956         }
1957
1958         return ret;
1959 }
1960
1961 static void bq27xxx_external_power_changed(struct power_supply *psy)
1962 {
1963         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1964
1965         cancel_delayed_work_sync(&di->work);
1966         schedule_delayed_work(&di->work, 0);
1967 }
1968
1969 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1970 {
1971         struct power_supply_desc *psy_desc;
1972         struct power_supply_config psy_cfg = {
1973                 .of_node = di->dev->of_node,
1974                 .drv_data = di,
1975         };
1976
1977         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1978         mutex_init(&di->lock);
1979
1980         di->regs       = bq27xxx_chip_data[di->chip].regs;
1981         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
1982         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
1983         di->opts       = bq27xxx_chip_data[di->chip].opts;
1984
1985         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1986         if (!psy_desc)
1987                 return -ENOMEM;
1988
1989         psy_desc->name = di->name;
1990         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1991         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
1992         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
1993         psy_desc->get_property = bq27xxx_battery_get_property;
1994         psy_desc->external_power_changed = bq27xxx_external_power_changed;
1995
1996         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1997         if (IS_ERR(di->bat)) {
1998                 dev_err(di->dev, "failed to register battery\n");
1999                 return PTR_ERR(di->bat);
2000         }
2001
2002         bq27xxx_battery_settings(di);
2003         bq27xxx_battery_update(di);
2004
2005         mutex_lock(&bq27xxx_list_lock);
2006         list_add(&di->list, &bq27xxx_battery_devices);
2007         mutex_unlock(&bq27xxx_list_lock);
2008
2009         return 0;
2010 }
2011 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
2012
2013 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
2014 {
2015         /*
2016          * power_supply_unregister call bq27xxx_battery_get_property which
2017          * call bq27xxx_battery_poll.
2018          * Make sure that bq27xxx_battery_poll will not call
2019          * schedule_delayed_work again after unregister (which cause OOPS).
2020          */
2021         poll_interval = 0;
2022
2023         cancel_delayed_work_sync(&di->work);
2024
2025         power_supply_unregister(di->bat);
2026
2027         mutex_lock(&bq27xxx_list_lock);
2028         list_del(&di->list);
2029         mutex_unlock(&bq27xxx_list_lock);
2030
2031         mutex_destroy(&di->lock);
2032 }
2033 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
2034
2035 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
2036 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
2037 MODULE_LICENSE("GPL");