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@kernel.org>
   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  * https://www.ti.com/product/bq27000
  22  * https://www.ti.com/product/bq27200
  23  * https://www.ti.com/product/bq27010
  24  * https://www.ti.com/product/bq27210
  25  * https://www.ti.com/product/bq27500
  26  * https://www.ti.com/product/bq27510-g1
  27  * https://www.ti.com/product/bq27510-g2
  28  * https://www.ti.com/product/bq27510-g3
  29  * https://www.ti.com/product/bq27520-g1
  30  * https://www.ti.com/product/bq27520-g2
  31  * https://www.ti.com/product/bq27520-g3
  32  * https://www.ti.com/product/bq27520-g4
  33  * https://www.ti.com/product/bq27530-g1
  34  * https://www.ti.com/product/bq27531-g1
  35  * https://www.ti.com/product/bq27541-g1
  36  * https://www.ti.com/product/bq27542-g1
  37  * https://www.ti.com/product/bq27546-g1
  38  * https://www.ti.com/product/bq27742-g1
  39  * https://www.ti.com/product/bq27545-g1
  40  * https://www.ti.com/product/bq27421-g1
  41  * https://www.ti.com/product/bq27425-g1
  42  * https://www.ti.com/product/bq27426
  43  * https://www.ti.com/product/bq27411-g1
  44  * https://www.ti.com/product/bq27441-g1
  45  * https://www.ti.com/product/bq27621-g1
  46  * https://www.ti.com/product/bq27z561
  47  * https://www.ti.com/product/bq28z610
  48  */
  49
  50 #include <linux/device.h>
  51 #include <linux/module.h>
  52 #include <linux/mutex.h>
  53 #include <linux/param.h>
  54 #include <linux/jiffies.h>
  55 #include <linux/workqueue.h>
  56 #include <linux/delay.h>
  57 #include <linux/platform_device.h>
  58 #include <linux/power_supply.h>
  59 #include <linux/slab.h>
  60 #include <linux/of.h>
  61
  62 #include <linux/power/bq27xxx_battery.h>
  63
  64 #define BQ27XXX_MANUFACTURER    "Texas Instruments"
  65
  66 /* BQ27XXX Flags */
  67 #define BQ27XXX_FLAG_DSC        BIT(0)
  68 #define BQ27XXX_FLAG_SOCF       BIT(1) /* State-of-Charge threshold final */
  69 #define BQ27XXX_FLAG_SOC1       BIT(2) /* State-of-Charge threshold 1 */
  70 #define BQ27XXX_FLAG_CFGUP      BIT(4)
  71 #define BQ27XXX_FLAG_FC         BIT(9)
  72 #define BQ27XXX_FLAG_OTD        BIT(14)
  73 #define BQ27XXX_FLAG_OTC        BIT(15)
  74 #define BQ27XXX_FLAG_UT         BIT(14)
  75 #define BQ27XXX_FLAG_OT         BIT(15)
  76
  77 /* BQ27000 has different layout for Flags register */
  78 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  79 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  80 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  81 #define BQ27000_FLAG_FC         BIT(5)
  82 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  83
  84 /* BQ27Z561 has different layout for Flags register */
  85 #define BQ27Z561_FLAG_FDC       BIT(4) /* Battery fully discharged */
  86 #define BQ27Z561_FLAG_FC                BIT(5) /* Battery fully charged */
  87 #define BQ27Z561_FLAG_DIS_CH    BIT(6) /* Battery is discharging */
  88
  89 /* control register params */
  90 #define BQ27XXX_SEALED                  0x20
  91 #define BQ27XXX_SET_CFGUPDATE           0x13
  92 #define BQ27XXX_SOFT_RESET              0x42
  93 #define BQ27XXX_RESET                   0x41
  94
  95 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  96 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  97 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  98
  99 #define INVALID_REG_ADDR        0xff
 100
 101 /*
 102  * bq27xxx_reg_index - Register names
 103  *
 104  * These are indexes into a device's register mapping array.
 105  */
 106
 107 enum bq27xxx_reg_index {
 108         BQ27XXX_REG_CTRL = 0,   /* Control */
 109         BQ27XXX_REG_TEMP,       /* Temperature */
 110         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
 111         BQ27XXX_REG_VOLT,       /* Voltage */
 112         BQ27XXX_REG_AI,         /* Average Current */
 113         BQ27XXX_REG_FLAGS,      /* Flags */
 114         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 115         BQ27XXX_REG_TTF,        /* Time-to-Full */
 116         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 117         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 118         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 119         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 120         BQ27XXX_REG_CYCT,       /* Cycle Count */
 121         BQ27XXX_REG_AE,         /* Available Energy */
 122         BQ27XXX_REG_SOC,        /* State-of-Charge */
 123         BQ27XXX_REG_DCAP,       /* Design Capacity */
 124         BQ27XXX_REG_AP,         /* Average Power */
 125         BQ27XXX_DM_CTRL,        /* Block Data Control */
 126         BQ27XXX_DM_CLASS,       /* Data Class */
 127         BQ27XXX_DM_BLOCK,       /* Data Block */
 128         BQ27XXX_DM_DATA,        /* Block Data */
 129         BQ27XXX_DM_CKSUM,       /* Block Data Checksum */
 130         BQ27XXX_REG_MAX,        /* sentinel */
 131 };
 132
 133 #define BQ27XXX_DM_REG_ROWS \
 134         [BQ27XXX_DM_CTRL] = 0x61,  \
 135         [BQ27XXX_DM_CLASS] = 0x3e, \
 136         [BQ27XXX_DM_BLOCK] = 0x3f, \
 137         [BQ27XXX_DM_DATA] = 0x40,  \
 138         [BQ27XXX_DM_CKSUM] = 0x60
 139
 140 /* Register mappings */
 141 static u8
 142         bq27000_regs[BQ27XXX_REG_MAX] = {
 143                 [BQ27XXX_REG_CTRL] = 0x00,
 144                 [BQ27XXX_REG_TEMP] = 0x06,
 145                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 146                 [BQ27XXX_REG_VOLT] = 0x08,
 147                 [BQ27XXX_REG_AI] = 0x14,
 148                 [BQ27XXX_REG_FLAGS] = 0x0a,
 149                 [BQ27XXX_REG_TTE] = 0x16,
 150                 [BQ27XXX_REG_TTF] = 0x18,
 151                 [BQ27XXX_REG_TTES] = 0x1c,
 152                 [BQ27XXX_REG_TTECP] = 0x26,
 153                 [BQ27XXX_REG_NAC] = 0x0c,
 154                 [BQ27XXX_REG_FCC] = 0x12,
 155                 [BQ27XXX_REG_CYCT] = 0x2a,
 156                 [BQ27XXX_REG_AE] = 0x22,
 157                 [BQ27XXX_REG_SOC] = 0x0b,
 158                 [BQ27XXX_REG_DCAP] = 0x76,
 159                 [BQ27XXX_REG_AP] = 0x24,
 160                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 161                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 162                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 163                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 164                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 165         },
 166         bq27010_regs[BQ27XXX_REG_MAX] = {
 167                 [BQ27XXX_REG_CTRL] = 0x00,
 168                 [BQ27XXX_REG_TEMP] = 0x06,
 169                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 170                 [BQ27XXX_REG_VOLT] = 0x08,
 171                 [BQ27XXX_REG_AI] = 0x14,
 172                 [BQ27XXX_REG_FLAGS] = 0x0a,
 173                 [BQ27XXX_REG_TTE] = 0x16,
 174                 [BQ27XXX_REG_TTF] = 0x18,
 175                 [BQ27XXX_REG_TTES] = 0x1c,
 176                 [BQ27XXX_REG_TTECP] = 0x26,
 177                 [BQ27XXX_REG_NAC] = 0x0c,
 178                 [BQ27XXX_REG_FCC] = 0x12,
 179                 [BQ27XXX_REG_CYCT] = 0x2a,
 180                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 181                 [BQ27XXX_REG_SOC] = 0x0b,
 182                 [BQ27XXX_REG_DCAP] = 0x76,
 183                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 184                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 185                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 186                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 187                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 188                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 189         },
 190         bq2750x_regs[BQ27XXX_REG_MAX] = {
 191                 [BQ27XXX_REG_CTRL] = 0x00,
 192                 [BQ27XXX_REG_TEMP] = 0x06,
 193                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 194                 [BQ27XXX_REG_VOLT] = 0x08,
 195                 [BQ27XXX_REG_AI] = 0x14,
 196                 [BQ27XXX_REG_FLAGS] = 0x0a,
 197                 [BQ27XXX_REG_TTE] = 0x16,
 198                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 199                 [BQ27XXX_REG_TTES] = 0x1a,
 200                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 201                 [BQ27XXX_REG_NAC] = 0x0c,
 202                 [BQ27XXX_REG_FCC] = 0x12,
 203                 [BQ27XXX_REG_CYCT] = 0x2a,
 204                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 205                 [BQ27XXX_REG_SOC] = 0x2c,
 206                 [BQ27XXX_REG_DCAP] = 0x3c,
 207                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 208                 BQ27XXX_DM_REG_ROWS,
 209         },
 210 #define bq2751x_regs bq27510g3_regs
 211 #define bq2752x_regs bq27510g3_regs
 212         bq27500_regs[BQ27XXX_REG_MAX] = {
 213                 [BQ27XXX_REG_CTRL] = 0x00,
 214                 [BQ27XXX_REG_TEMP] = 0x06,
 215                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 216                 [BQ27XXX_REG_VOLT] = 0x08,
 217                 [BQ27XXX_REG_AI] = 0x14,
 218                 [BQ27XXX_REG_FLAGS] = 0x0a,
 219                 [BQ27XXX_REG_TTE] = 0x16,
 220                 [BQ27XXX_REG_TTF] = 0x18,
 221                 [BQ27XXX_REG_TTES] = 0x1c,
 222                 [BQ27XXX_REG_TTECP] = 0x26,
 223                 [BQ27XXX_REG_NAC] = 0x0c,
 224                 [BQ27XXX_REG_FCC] = 0x12,
 225                 [BQ27XXX_REG_CYCT] = 0x2a,
 226                 [BQ27XXX_REG_AE] = 0x22,
 227                 [BQ27XXX_REG_SOC] = 0x2c,
 228                 [BQ27XXX_REG_DCAP] = 0x3c,
 229                 [BQ27XXX_REG_AP] = 0x24,
 230                 BQ27XXX_DM_REG_ROWS,
 231         },
 232 #define bq27510g1_regs bq27500_regs
 233 #define bq27510g2_regs bq27500_regs
 234         bq27510g3_regs[BQ27XXX_REG_MAX] = {
 235                 [BQ27XXX_REG_CTRL] = 0x00,
 236                 [BQ27XXX_REG_TEMP] = 0x06,
 237                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 238                 [BQ27XXX_REG_VOLT] = 0x08,
 239                 [BQ27XXX_REG_AI] = 0x14,
 240                 [BQ27XXX_REG_FLAGS] = 0x0a,
 241                 [BQ27XXX_REG_TTE] = 0x16,
 242                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 243                 [BQ27XXX_REG_TTES] = 0x1a,
 244                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 245                 [BQ27XXX_REG_NAC] = 0x0c,
 246                 [BQ27XXX_REG_FCC] = 0x12,
 247                 [BQ27XXX_REG_CYCT] = 0x1e,
 248                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 249                 [BQ27XXX_REG_SOC] = 0x20,
 250                 [BQ27XXX_REG_DCAP] = 0x2e,
 251                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 252                 BQ27XXX_DM_REG_ROWS,
 253         },
 254         bq27520g1_regs[BQ27XXX_REG_MAX] = {
 255                 [BQ27XXX_REG_CTRL] = 0x00,
 256                 [BQ27XXX_REG_TEMP] = 0x06,
 257                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 258                 [BQ27XXX_REG_VOLT] = 0x08,
 259                 [BQ27XXX_REG_AI] = 0x14,
 260                 [BQ27XXX_REG_FLAGS] = 0x0a,
 261                 [BQ27XXX_REG_TTE] = 0x16,
 262                 [BQ27XXX_REG_TTF] = 0x18,
 263                 [BQ27XXX_REG_TTES] = 0x1c,
 264                 [BQ27XXX_REG_TTECP] = 0x26,
 265                 [BQ27XXX_REG_NAC] = 0x0c,
 266                 [BQ27XXX_REG_FCC] = 0x12,
 267                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 268                 [BQ27XXX_REG_AE] = 0x22,
 269                 [BQ27XXX_REG_SOC] = 0x2c,
 270                 [BQ27XXX_REG_DCAP] = 0x3c,
 271                 [BQ27XXX_REG_AP] = 0x24,
 272                 BQ27XXX_DM_REG_ROWS,
 273         },
 274         bq27520g2_regs[BQ27XXX_REG_MAX] = {
 275                 [BQ27XXX_REG_CTRL] = 0x00,
 276                 [BQ27XXX_REG_TEMP] = 0x06,
 277                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 278                 [BQ27XXX_REG_VOLT] = 0x08,
 279                 [BQ27XXX_REG_AI] = 0x14,
 280                 [BQ27XXX_REG_FLAGS] = 0x0a,
 281                 [BQ27XXX_REG_TTE] = 0x16,
 282                 [BQ27XXX_REG_TTF] = 0x18,
 283                 [BQ27XXX_REG_TTES] = 0x1c,
 284                 [BQ27XXX_REG_TTECP] = 0x26,
 285                 [BQ27XXX_REG_NAC] = 0x0c,
 286                 [BQ27XXX_REG_FCC] = 0x12,
 287                 [BQ27XXX_REG_CYCT] = 0x2a,
 288                 [BQ27XXX_REG_AE] = 0x22,
 289                 [BQ27XXX_REG_SOC] = 0x2c,
 290                 [BQ27XXX_REG_DCAP] = 0x3c,
 291                 [BQ27XXX_REG_AP] = 0x24,
 292                 BQ27XXX_DM_REG_ROWS,
 293         },
 294         bq27520g3_regs[BQ27XXX_REG_MAX] = {
 295                 [BQ27XXX_REG_CTRL] = 0x00,
 296                 [BQ27XXX_REG_TEMP] = 0x06,
 297                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 298                 [BQ27XXX_REG_VOLT] = 0x08,
 299                 [BQ27XXX_REG_AI] = 0x14,
 300                 [BQ27XXX_REG_FLAGS] = 0x0a,
 301                 [BQ27XXX_REG_TTE] = 0x16,
 302                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 303                 [BQ27XXX_REG_TTES] = 0x1c,
 304                 [BQ27XXX_REG_TTECP] = 0x26,
 305                 [BQ27XXX_REG_NAC] = 0x0c,
 306                 [BQ27XXX_REG_FCC] = 0x12,
 307                 [BQ27XXX_REG_CYCT] = 0x2a,
 308                 [BQ27XXX_REG_AE] = 0x22,
 309                 [BQ27XXX_REG_SOC] = 0x2c,
 310                 [BQ27XXX_REG_DCAP] = 0x3c,
 311                 [BQ27XXX_REG_AP] = 0x24,
 312                 BQ27XXX_DM_REG_ROWS,
 313         },
 314         bq27520g4_regs[BQ27XXX_REG_MAX] = {
 315                 [BQ27XXX_REG_CTRL] = 0x00,
 316                 [BQ27XXX_REG_TEMP] = 0x06,
 317                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 318                 [BQ27XXX_REG_VOLT] = 0x08,
 319                 [BQ27XXX_REG_AI] = 0x14,
 320                 [BQ27XXX_REG_FLAGS] = 0x0a,
 321                 [BQ27XXX_REG_TTE] = 0x16,
 322                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 323                 [BQ27XXX_REG_TTES] = 0x1c,
 324                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 325                 [BQ27XXX_REG_NAC] = 0x0c,
 326                 [BQ27XXX_REG_FCC] = 0x12,
 327                 [BQ27XXX_REG_CYCT] = 0x1e,
 328                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 329                 [BQ27XXX_REG_SOC] = 0x20,
 330                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 331                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 332                 BQ27XXX_DM_REG_ROWS,
 333         },
 334         bq27521_regs[BQ27XXX_REG_MAX] = {
 335                 [BQ27XXX_REG_CTRL] = 0x02,
 336                 [BQ27XXX_REG_TEMP] = 0x0a,
 337                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 338                 [BQ27XXX_REG_VOLT] = 0x0c,
 339                 [BQ27XXX_REG_AI] = 0x0e,
 340                 [BQ27XXX_REG_FLAGS] = 0x08,
 341                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 342                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 343                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 344                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 345                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 346                 [BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
 347                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 348                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 349                 [BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
 350                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 351                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 352                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 353                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 354                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 355                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 356                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 357         },
 358         bq27530_regs[BQ27XXX_REG_MAX] = {
 359                 [BQ27XXX_REG_CTRL] = 0x00,
 360                 [BQ27XXX_REG_TEMP] = 0x06,
 361                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 362                 [BQ27XXX_REG_VOLT] = 0x08,
 363                 [BQ27XXX_REG_AI] = 0x14,
 364                 [BQ27XXX_REG_FLAGS] = 0x0a,
 365                 [BQ27XXX_REG_TTE] = 0x16,
 366                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 367                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 368                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 369                 [BQ27XXX_REG_NAC] = 0x0c,
 370                 [BQ27XXX_REG_FCC] = 0x12,
 371                 [BQ27XXX_REG_CYCT] = 0x2a,
 372                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 373                 [BQ27XXX_REG_SOC] = 0x2c,
 374                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 375                 [BQ27XXX_REG_AP] = 0x24,
 376                 BQ27XXX_DM_REG_ROWS,
 377         },
 378 #define bq27531_regs bq27530_regs
 379         bq27541_regs[BQ27XXX_REG_MAX] = {
 380                 [BQ27XXX_REG_CTRL] = 0x00,
 381                 [BQ27XXX_REG_TEMP] = 0x06,
 382                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 383                 [BQ27XXX_REG_VOLT] = 0x08,
 384                 [BQ27XXX_REG_AI] = 0x14,
 385                 [BQ27XXX_REG_FLAGS] = 0x0a,
 386                 [BQ27XXX_REG_TTE] = 0x16,
 387                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 388                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 389                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 390                 [BQ27XXX_REG_NAC] = 0x0c,
 391                 [BQ27XXX_REG_FCC] = 0x12,
 392                 [BQ27XXX_REG_CYCT] = 0x2a,
 393                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 394                 [BQ27XXX_REG_SOC] = 0x2c,
 395                 [BQ27XXX_REG_DCAP] = 0x3c,
 396                 [BQ27XXX_REG_AP] = 0x24,
 397                 BQ27XXX_DM_REG_ROWS,
 398         },
 399 #define bq27542_regs bq27541_regs
 400 #define bq27546_regs bq27541_regs
 401 #define bq27742_regs bq27541_regs
 402         bq27545_regs[BQ27XXX_REG_MAX] = {
 403                 [BQ27XXX_REG_CTRL] = 0x00,
 404                 [BQ27XXX_REG_TEMP] = 0x06,
 405                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 406                 [BQ27XXX_REG_VOLT] = 0x08,
 407                 [BQ27XXX_REG_AI] = 0x14,
 408                 [BQ27XXX_REG_FLAGS] = 0x0a,
 409                 [BQ27XXX_REG_TTE] = 0x16,
 410                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 411                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 412                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 413                 [BQ27XXX_REG_NAC] = 0x0c,
 414                 [BQ27XXX_REG_FCC] = 0x12,
 415                 [BQ27XXX_REG_CYCT] = 0x2a,
 416                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 417                 [BQ27XXX_REG_SOC] = 0x2c,
 418                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 419                 [BQ27XXX_REG_AP] = 0x24,
 420                 BQ27XXX_DM_REG_ROWS,
 421         },
 422         bq27421_regs[BQ27XXX_REG_MAX] = {
 423                 [BQ27XXX_REG_CTRL] = 0x00,
 424                 [BQ27XXX_REG_TEMP] = 0x02,
 425                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 426                 [BQ27XXX_REG_VOLT] = 0x04,
 427                 [BQ27XXX_REG_AI] = 0x10,
 428                 [BQ27XXX_REG_FLAGS] = 0x06,
 429                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 430                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 431                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 432                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 433                 [BQ27XXX_REG_NAC] = 0x08,
 434                 [BQ27XXX_REG_FCC] = 0x0e,
 435                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 436                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 437                 [BQ27XXX_REG_SOC] = 0x1c,
 438                 [BQ27XXX_REG_DCAP] = 0x3c,
 439                 [BQ27XXX_REG_AP] = 0x18,
 440                 BQ27XXX_DM_REG_ROWS,
 441         },
 442 #define bq27411_regs bq27421_regs
 443 #define bq27425_regs bq27421_regs
 444 #define bq27426_regs bq27421_regs
 445 #define bq27441_regs bq27421_regs
 446 #define bq27621_regs bq27421_regs
 447         bq27z561_regs[BQ27XXX_REG_MAX] = {
 448                 [BQ27XXX_REG_CTRL] = 0x00,
 449                 [BQ27XXX_REG_TEMP] = 0x06,
 450                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 451                 [BQ27XXX_REG_VOLT] = 0x08,
 452                 [BQ27XXX_REG_AI] = 0x14,
 453                 [BQ27XXX_REG_FLAGS] = 0x0a,
 454                 [BQ27XXX_REG_TTE] = 0x16,
 455                 [BQ27XXX_REG_TTF] = 0x18,
 456                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 457                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 458                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 459                 [BQ27XXX_REG_FCC] = 0x12,
 460                 [BQ27XXX_REG_CYCT] = 0x2a,
 461                 [BQ27XXX_REG_AE] = 0x22,
 462                 [BQ27XXX_REG_SOC] = 0x2c,
 463                 [BQ27XXX_REG_DCAP] = 0x3c,
 464                 [BQ27XXX_REG_AP] = 0x22,
 465                 BQ27XXX_DM_REG_ROWS,
 466         },
 467         bq28z610_regs[BQ27XXX_REG_MAX] = {
 468                 [BQ27XXX_REG_CTRL] = 0x00,
 469                 [BQ27XXX_REG_TEMP] = 0x06,
 470                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 471                 [BQ27XXX_REG_VOLT] = 0x08,
 472                 [BQ27XXX_REG_AI] = 0x14,
 473                 [BQ27XXX_REG_FLAGS] = 0x0a,
 474                 [BQ27XXX_REG_TTE] = 0x16,
 475                 [BQ27XXX_REG_TTF] = 0x18,
 476                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 477                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 478                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 479                 [BQ27XXX_REG_FCC] = 0x12,
 480                 [BQ27XXX_REG_CYCT] = 0x2a,
 481                 [BQ27XXX_REG_AE] = 0x22,
 482                 [BQ27XXX_REG_SOC] = 0x2c,
 483                 [BQ27XXX_REG_DCAP] = 0x3c,
 484                 [BQ27XXX_REG_AP] = 0x22,
 485                 BQ27XXX_DM_REG_ROWS,
 486         };
 487
 488 static enum power_supply_property bq27000_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_ENERGY_NOW,
 505         POWER_SUPPLY_PROP_POWER_AVG,
 506         POWER_SUPPLY_PROP_HEALTH,
 507         POWER_SUPPLY_PROP_MANUFACTURER,
 508 };
 509
 510 static enum power_supply_property bq27010_props[] = {
 511         POWER_SUPPLY_PROP_STATUS,
 512         POWER_SUPPLY_PROP_PRESENT,
 513         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 514         POWER_SUPPLY_PROP_CURRENT_NOW,
 515         POWER_SUPPLY_PROP_CAPACITY,
 516         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 517         POWER_SUPPLY_PROP_TEMP,
 518         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 519         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 520         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 521         POWER_SUPPLY_PROP_TECHNOLOGY,
 522         POWER_SUPPLY_PROP_CHARGE_FULL,
 523         POWER_SUPPLY_PROP_CHARGE_NOW,
 524         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 525         POWER_SUPPLY_PROP_CYCLE_COUNT,
 526         POWER_SUPPLY_PROP_HEALTH,
 527         POWER_SUPPLY_PROP_MANUFACTURER,
 528 };
 529
 530 #define bq2750x_props bq27510g3_props
 531 #define bq2751x_props bq27510g3_props
 532 #define bq2752x_props bq27510g3_props
 533
 534 static enum power_supply_property bq27500_props[] = {
 535         POWER_SUPPLY_PROP_STATUS,
 536         POWER_SUPPLY_PROP_PRESENT,
 537         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 538         POWER_SUPPLY_PROP_CURRENT_NOW,
 539         POWER_SUPPLY_PROP_CAPACITY,
 540         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 541         POWER_SUPPLY_PROP_TEMP,
 542         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 543         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 544         POWER_SUPPLY_PROP_TECHNOLOGY,
 545         POWER_SUPPLY_PROP_CHARGE_FULL,
 546         POWER_SUPPLY_PROP_CHARGE_NOW,
 547         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 548         POWER_SUPPLY_PROP_CYCLE_COUNT,
 549         POWER_SUPPLY_PROP_ENERGY_NOW,
 550         POWER_SUPPLY_PROP_POWER_AVG,
 551         POWER_SUPPLY_PROP_HEALTH,
 552         POWER_SUPPLY_PROP_MANUFACTURER,
 553 };
 554 #define bq27510g1_props bq27500_props
 555 #define bq27510g2_props bq27500_props
 556
 557 static enum power_supply_property bq27510g3_props[] = {
 558         POWER_SUPPLY_PROP_STATUS,
 559         POWER_SUPPLY_PROP_PRESENT,
 560         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 561         POWER_SUPPLY_PROP_CURRENT_NOW,
 562         POWER_SUPPLY_PROP_CAPACITY,
 563         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 564         POWER_SUPPLY_PROP_TEMP,
 565         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 566         POWER_SUPPLY_PROP_TECHNOLOGY,
 567         POWER_SUPPLY_PROP_CHARGE_FULL,
 568         POWER_SUPPLY_PROP_CHARGE_NOW,
 569         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 570         POWER_SUPPLY_PROP_CYCLE_COUNT,
 571         POWER_SUPPLY_PROP_HEALTH,
 572         POWER_SUPPLY_PROP_MANUFACTURER,
 573 };
 574
 575 static enum power_supply_property bq27520g1_props[] = {
 576         POWER_SUPPLY_PROP_STATUS,
 577         POWER_SUPPLY_PROP_PRESENT,
 578         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 579         POWER_SUPPLY_PROP_CURRENT_NOW,
 580         POWER_SUPPLY_PROP_CAPACITY,
 581         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 582         POWER_SUPPLY_PROP_TEMP,
 583         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 584         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 585         POWER_SUPPLY_PROP_TECHNOLOGY,
 586         POWER_SUPPLY_PROP_CHARGE_FULL,
 587         POWER_SUPPLY_PROP_CHARGE_NOW,
 588         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 589         POWER_SUPPLY_PROP_ENERGY_NOW,
 590         POWER_SUPPLY_PROP_POWER_AVG,
 591         POWER_SUPPLY_PROP_HEALTH,
 592         POWER_SUPPLY_PROP_MANUFACTURER,
 593 };
 594
 595 #define bq27520g2_props bq27500_props
 596
 597 static enum power_supply_property bq27520g3_props[] = {
 598         POWER_SUPPLY_PROP_STATUS,
 599         POWER_SUPPLY_PROP_PRESENT,
 600         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 601         POWER_SUPPLY_PROP_CURRENT_NOW,
 602         POWER_SUPPLY_PROP_CAPACITY,
 603         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 604         POWER_SUPPLY_PROP_TEMP,
 605         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 606         POWER_SUPPLY_PROP_TECHNOLOGY,
 607         POWER_SUPPLY_PROP_CHARGE_FULL,
 608         POWER_SUPPLY_PROP_CHARGE_NOW,
 609         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 610         POWER_SUPPLY_PROP_CYCLE_COUNT,
 611         POWER_SUPPLY_PROP_ENERGY_NOW,
 612         POWER_SUPPLY_PROP_POWER_AVG,
 613         POWER_SUPPLY_PROP_HEALTH,
 614         POWER_SUPPLY_PROP_MANUFACTURER,
 615 };
 616
 617 static enum power_supply_property bq27520g4_props[] = {
 618         POWER_SUPPLY_PROP_STATUS,
 619         POWER_SUPPLY_PROP_PRESENT,
 620         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 621         POWER_SUPPLY_PROP_CURRENT_NOW,
 622         POWER_SUPPLY_PROP_CAPACITY,
 623         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 624         POWER_SUPPLY_PROP_TEMP,
 625         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 626         POWER_SUPPLY_PROP_TECHNOLOGY,
 627         POWER_SUPPLY_PROP_CHARGE_FULL,
 628         POWER_SUPPLY_PROP_CHARGE_NOW,
 629         POWER_SUPPLY_PROP_CYCLE_COUNT,
 630         POWER_SUPPLY_PROP_HEALTH,
 631         POWER_SUPPLY_PROP_MANUFACTURER,
 632 };
 633
 634 static enum power_supply_property bq27521_props[] = {
 635         POWER_SUPPLY_PROP_STATUS,
 636         POWER_SUPPLY_PROP_PRESENT,
 637         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 638         POWER_SUPPLY_PROP_CURRENT_NOW,
 639         POWER_SUPPLY_PROP_TEMP,
 640         POWER_SUPPLY_PROP_TECHNOLOGY,
 641 };
 642
 643 static enum power_supply_property bq27530_props[] = {
 644         POWER_SUPPLY_PROP_STATUS,
 645         POWER_SUPPLY_PROP_PRESENT,
 646         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 647         POWER_SUPPLY_PROP_CURRENT_NOW,
 648         POWER_SUPPLY_PROP_CAPACITY,
 649         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 650         POWER_SUPPLY_PROP_TEMP,
 651         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 652         POWER_SUPPLY_PROP_TECHNOLOGY,
 653         POWER_SUPPLY_PROP_CHARGE_FULL,
 654         POWER_SUPPLY_PROP_CHARGE_NOW,
 655         POWER_SUPPLY_PROP_POWER_AVG,
 656         POWER_SUPPLY_PROP_HEALTH,
 657         POWER_SUPPLY_PROP_CYCLE_COUNT,
 658         POWER_SUPPLY_PROP_MANUFACTURER,
 659 };
 660 #define bq27531_props bq27530_props
 661
 662 static enum power_supply_property bq27541_props[] = {
 663         POWER_SUPPLY_PROP_STATUS,
 664         POWER_SUPPLY_PROP_PRESENT,
 665         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 666         POWER_SUPPLY_PROP_CURRENT_NOW,
 667         POWER_SUPPLY_PROP_CAPACITY,
 668         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 669         POWER_SUPPLY_PROP_TEMP,
 670         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 671         POWER_SUPPLY_PROP_TECHNOLOGY,
 672         POWER_SUPPLY_PROP_CHARGE_FULL,
 673         POWER_SUPPLY_PROP_CHARGE_NOW,
 674         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 675         POWER_SUPPLY_PROP_CYCLE_COUNT,
 676         POWER_SUPPLY_PROP_POWER_AVG,
 677         POWER_SUPPLY_PROP_HEALTH,
 678         POWER_SUPPLY_PROP_MANUFACTURER,
 679 };
 680 #define bq27542_props bq27541_props
 681 #define bq27546_props bq27541_props
 682 #define bq27742_props bq27541_props
 683
 684 static enum power_supply_property bq27545_props[] = {
 685         POWER_SUPPLY_PROP_STATUS,
 686         POWER_SUPPLY_PROP_PRESENT,
 687         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 688         POWER_SUPPLY_PROP_CURRENT_NOW,
 689         POWER_SUPPLY_PROP_CAPACITY,
 690         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 691         POWER_SUPPLY_PROP_TEMP,
 692         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 693         POWER_SUPPLY_PROP_TECHNOLOGY,
 694         POWER_SUPPLY_PROP_CHARGE_FULL,
 695         POWER_SUPPLY_PROP_CHARGE_NOW,
 696         POWER_SUPPLY_PROP_HEALTH,
 697         POWER_SUPPLY_PROP_CYCLE_COUNT,
 698         POWER_SUPPLY_PROP_POWER_AVG,
 699         POWER_SUPPLY_PROP_MANUFACTURER,
 700 };
 701
 702 static enum power_supply_property bq27421_props[] = {
 703         POWER_SUPPLY_PROP_STATUS,
 704         POWER_SUPPLY_PROP_PRESENT,
 705         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 706         POWER_SUPPLY_PROP_CURRENT_NOW,
 707         POWER_SUPPLY_PROP_CAPACITY,
 708         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 709         POWER_SUPPLY_PROP_TEMP,
 710         POWER_SUPPLY_PROP_TECHNOLOGY,
 711         POWER_SUPPLY_PROP_CHARGE_FULL,
 712         POWER_SUPPLY_PROP_CHARGE_NOW,
 713         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 714         POWER_SUPPLY_PROP_MANUFACTURER,
 715 };
 716 #define bq27411_props bq27421_props
 717 #define bq27425_props bq27421_props
 718 #define bq27426_props bq27421_props
 719 #define bq27441_props bq27421_props
 720 #define bq27621_props bq27421_props
 721
 722 static enum power_supply_property bq27z561_props[] = {
 723         POWER_SUPPLY_PROP_STATUS,
 724         POWER_SUPPLY_PROP_PRESENT,
 725         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 726         POWER_SUPPLY_PROP_CURRENT_NOW,
 727         POWER_SUPPLY_PROP_CAPACITY,
 728         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 729         POWER_SUPPLY_PROP_TEMP,
 730         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 731         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 732         POWER_SUPPLY_PROP_TECHNOLOGY,
 733         POWER_SUPPLY_PROP_CHARGE_FULL,
 734         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 735         POWER_SUPPLY_PROP_CYCLE_COUNT,
 736         POWER_SUPPLY_PROP_POWER_AVG,
 737         POWER_SUPPLY_PROP_HEALTH,
 738         POWER_SUPPLY_PROP_MANUFACTURER,
 739 };
 740
 741 static enum power_supply_property bq28z610_props[] = {
 742         POWER_SUPPLY_PROP_STATUS,
 743         POWER_SUPPLY_PROP_PRESENT,
 744         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 745         POWER_SUPPLY_PROP_CURRENT_NOW,
 746         POWER_SUPPLY_PROP_CAPACITY,
 747         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 748         POWER_SUPPLY_PROP_TEMP,
 749         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 750         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 751         POWER_SUPPLY_PROP_TECHNOLOGY,
 752         POWER_SUPPLY_PROP_CHARGE_FULL,
 753         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 754         POWER_SUPPLY_PROP_CYCLE_COUNT,
 755         POWER_SUPPLY_PROP_POWER_AVG,
 756         POWER_SUPPLY_PROP_HEALTH,
 757         POWER_SUPPLY_PROP_MANUFACTURER,
 758 };
 759
 760 struct bq27xxx_dm_reg {
 761         u8 subclass_id;
 762         u8 offset;
 763         u8 bytes;
 764         u16 min, max;
 765 };
 766
 767 enum bq27xxx_dm_reg_id {
 768         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 769         BQ27XXX_DM_DESIGN_ENERGY,
 770         BQ27XXX_DM_TERMINATE_VOLTAGE,
 771 };
 772
 773 #define bq27000_dm_regs 0
 774 #define bq27010_dm_regs 0
 775 #define bq2750x_dm_regs 0
 776 #define bq2751x_dm_regs 0
 777 #define bq2752x_dm_regs 0
 778
 779 #if 0 /* not yet tested */
 780 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 781         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 10, 2,    0, 65535 },
 782         [BQ27XXX_DM_DESIGN_ENERGY]     = { }, /* missing on chip */
 783         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
 784 };
 785 #else
 786 #define bq27500_dm_regs 0
 787 #endif
 788
 789 /* todo create data memory definitions from datasheets and test on chips */
 790 #define bq27510g1_dm_regs 0
 791 #define bq27510g2_dm_regs 0
 792 #define bq27510g3_dm_regs 0
 793 #define bq27520g1_dm_regs 0
 794 #define bq27520g2_dm_regs 0
 795 #define bq27520g3_dm_regs 0
 796 #define bq27520g4_dm_regs 0
 797 #define bq27521_dm_regs 0
 798 #define bq27530_dm_regs 0
 799 #define bq27531_dm_regs 0
 800 #define bq27541_dm_regs 0
 801 #define bq27542_dm_regs 0
 802 #define bq27546_dm_regs 0
 803 #define bq27742_dm_regs 0
 804
 805 #if 0 /* not yet tested */
 806 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
 807         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 23, 2,    0, 32767 },
 808         [BQ27XXX_DM_DESIGN_ENERGY]     = { 48, 25, 2,    0, 32767 },
 809         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800,  3700 },
 810 };
 811 #else
 812 #define bq27545_dm_regs 0
 813 #endif
 814
 815 static struct bq27xxx_dm_reg bq27411_dm_regs[] = {
 816         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0, 32767 },
 817         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 818         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2800,  3700 },
 819 };
 820
 821 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
 822         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0,  8000 },
 823         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 824         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500,  3700 },
 825 };
 826
 827 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
 828         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 12, 2,    0, 32767 },
 829         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 14, 2,    0, 32767 },
 830         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800,  3700 },
 831 };
 832
 833 static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
 834         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82,  6, 2,    0,  8000 },
 835         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82,  8, 2,    0, 32767 },
 836         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 10, 2, 2500,  3700 },
 837 };
 838
 839 #if 0 /* not yet tested */
 840 #define bq27441_dm_regs bq27421_dm_regs
 841 #else
 842 #define bq27441_dm_regs 0
 843 #endif
 844
 845 #if 0 /* not yet tested */
 846 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 847         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 3, 2,    0,  8000 },
 848         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 5, 2,    0, 32767 },
 849         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500,  3700 },
 850 };
 851 #else
 852 #define bq27621_dm_regs 0
 853 #endif
 854
 855 #define bq27z561_dm_regs 0
 856 #define bq28z610_dm_regs 0
 857
 858 #define BQ27XXX_O_ZERO  0x00000001
 859 #define BQ27XXX_O_OTDC  0x00000002 /* has OTC/OTD overtemperature flags */
 860 #define BQ27XXX_O_UTOT  0x00000004 /* has OT overtemperature flag */
 861 #define BQ27XXX_O_CFGUP 0x00000008
 862 #define BQ27XXX_O_RAM   0x00000010
 863 #define BQ27Z561_O_BITS 0x00000020
 864
 865 #define BQ27XXX_DATA(ref, key, opt) {           \
 866         .opts = (opt),                          \
 867         .unseal_key = key,                      \
 868         .regs  = ref##_regs,                    \
 869         .dm_regs = ref##_dm_regs,               \
 870         .props = ref##_props,                   \
 871         .props_size = ARRAY_SIZE(ref##_props) }
 872
 873 static struct {
 874         u32 opts;
 875         u32 unseal_key;
 876         u8 *regs;
 877         struct bq27xxx_dm_reg *dm_regs;
 878         enum power_supply_property *props;
 879         size_t props_size;
 880 } bq27xxx_chip_data[] = {
 881         [BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO),
 882         [BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO),
 883         [BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 884         [BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 885         [BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
 886         [BQ27500]   = BQ27XXX_DATA(bq27500,   0x04143672, BQ27XXX_O_OTDC),
 887         [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0         , BQ27XXX_O_OTDC),
 888         [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0         , BQ27XXX_O_OTDC),
 889         [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0         , BQ27XXX_O_OTDC),
 890         [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0         , BQ27XXX_O_OTDC),
 891         [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 892         [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 893         [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
 894         [BQ27521]   = BQ27XXX_DATA(bq27521,   0         , 0),
 895         [BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 896         [BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
 897         [BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
 898         [BQ27542]   = BQ27XXX_DATA(bq27542,   0         , BQ27XXX_O_OTDC),
 899         [BQ27546]   = BQ27XXX_DATA(bq27546,   0         , BQ27XXX_O_OTDC),
 900         [BQ27742]   = BQ27XXX_DATA(bq27742,   0         , BQ27XXX_O_OTDC),
 901         [BQ27545]   = BQ27XXX_DATA(bq27545,   0x04143672, BQ27XXX_O_OTDC),
 902         [BQ27411]   = BQ27XXX_DATA(bq27411,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 903         [BQ27421]   = BQ27XXX_DATA(bq27421,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 904         [BQ27425]   = BQ27XXX_DATA(bq27425,   0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
 905         [BQ27426]   = BQ27XXX_DATA(bq27426,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 906         [BQ27441]   = BQ27XXX_DATA(bq27441,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 907         [BQ27621]   = BQ27XXX_DATA(bq27621,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 908         [BQ27Z561]  = BQ27XXX_DATA(bq27z561,  0         , BQ27Z561_O_BITS),
 909         [BQ28Z610]  = BQ27XXX_DATA(bq28z610,  0         , BQ27Z561_O_BITS),
 910 };
 911
 912 static DEFINE_MUTEX(bq27xxx_list_lock);
 913 static LIST_HEAD(bq27xxx_battery_devices);
 914
 915 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
 916
 917 #define BQ27XXX_DM_SZ   32
 918
 919 /**
 920  * struct bq27xxx_dm_buf - chip data memory buffer
 921  * @class: data memory subclass_id
 922  * @block: data memory block number
 923  * @data: data from/for the block
 924  * @has_data: true if data has been filled by read
 925  * @dirty: true if data has changed since last read/write
 926  *
 927  * Encapsulates info required to manage chip data memory blocks.
 928  */
 929 struct bq27xxx_dm_buf {
 930         u8 class;
 931         u8 block;
 932         u8 data[BQ27XXX_DM_SZ];
 933         bool has_data, dirty;
 934 };
 935
 936 #define BQ27XXX_DM_BUF(di, i) { \
 937         .class = (di)->dm_regs[i].subclass_id, \
 938         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
 939 }
 940
 941 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
 942                                       struct bq27xxx_dm_reg *reg)
 943 {
 944         if (buf->class == reg->subclass_id &&
 945             buf->block == reg->offset / BQ27XXX_DM_SZ)
 946                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
 947
 948         return NULL;
 949 }
 950
 951 static const char * const bq27xxx_dm_reg_name[] = {
 952         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
 953         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
 954         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
 955 };
 956
 957
 958 static bool bq27xxx_dt_to_nvm = true;
 959 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
 960 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
 961         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
 962         "Users must set this =0 when installing a different type of battery!\n"
 963         "Default is =1."
 964 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
 965         "\nSetting this affects future kernel updates, not the current configuration."
 966 #endif
 967 );
 968
 969 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
 970 {
 971         struct bq27xxx_device_info *di;
 972         unsigned int prev_val = *(unsigned int *) kp->arg;
 973         int ret;
 974
 975         ret = param_set_uint(val, kp);
 976         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
 977                 return ret;
 978
 979         mutex_lock(&bq27xxx_list_lock);
 980         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
 981                 cancel_delayed_work_sync(&di->work);
 982                 schedule_delayed_work(&di->work, 0);
 983         }
 984         mutex_unlock(&bq27xxx_list_lock);
 985
 986         return ret;
 987 }
 988
 989 static const struct kernel_param_ops param_ops_poll_interval = {
 990         .get = param_get_uint,
 991         .set = poll_interval_param_set,
 992 };
 993
 994 static unsigned int poll_interval = 360;
 995 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
 996 MODULE_PARM_DESC(poll_interval,
 997                  "battery poll interval in seconds - 0 disables polling");
 998
 999 /*
1000  * Common code for BQ27xxx devices
1001  */
1002
1003 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
1004                                bool single)
1005 {
1006         int ret;
1007
1008         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1009                 return -EINVAL;
1010
1011         ret = di->bus.read(di, di->regs[reg_index], single);
1012         if (ret < 0)
1013                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
1014                         di->regs[reg_index], reg_index);
1015
1016         return ret;
1017 }
1018
1019 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
1020                                 u16 value, bool single)
1021 {
1022         int ret;
1023
1024         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1025                 return -EINVAL;
1026
1027         if (!di->bus.write)
1028                 return -EPERM;
1029
1030         ret = di->bus.write(di, di->regs[reg_index], value, single);
1031         if (ret < 0)
1032                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
1033                         di->regs[reg_index], reg_index);
1034
1035         return ret;
1036 }
1037
1038 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
1039                                      u8 *data, int len)
1040 {
1041         int ret;
1042
1043         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1044                 return -EINVAL;
1045
1046         if (!di->bus.read_bulk)
1047                 return -EPERM;
1048
1049         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
1050         if (ret < 0)
1051                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
1052                         di->regs[reg_index], reg_index);
1053
1054         return ret;
1055 }
1056
1057 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
1058                                       u8 *data, int len)
1059 {
1060         int ret;
1061
1062         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1063                 return -EINVAL;
1064
1065         if (!di->bus.write_bulk)
1066                 return -EPERM;
1067
1068         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
1069         if (ret < 0)
1070                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
1071                         di->regs[reg_index], reg_index);
1072
1073         return ret;
1074 }
1075
1076 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
1077 {
1078         int ret;
1079
1080         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
1081         if (ret < 0) {
1082                 dev_err(di->dev, "bus error on seal: %d\n", ret);
1083                 return ret;
1084         }
1085
1086         return 0;
1087 }
1088
1089 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
1090 {
1091         int ret;
1092
1093         if (di->unseal_key == 0) {
1094                 dev_err(di->dev, "unseal failed due to missing key\n");
1095                 return -EINVAL;
1096         }
1097
1098         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1099         if (ret < 0)
1100                 goto out;
1101
1102         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1103         if (ret < 0)
1104                 goto out;
1105
1106         return 0;
1107
1108 out:
1109         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1110         return ret;
1111 }
1112
1113 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1114 {
1115         u16 sum = 0;
1116         int i;
1117
1118         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1119                 sum += buf->data[i];
1120         sum &= 0xff;
1121
1122         return 0xff - sum;
1123 }
1124
1125 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1126                                          struct bq27xxx_dm_buf *buf)
1127 {
1128         int ret;
1129
1130         buf->has_data = false;
1131
1132         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1133         if (ret < 0)
1134                 goto out;
1135
1136         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1137         if (ret < 0)
1138                 goto out;
1139
1140         BQ27XXX_MSLEEP(1);
1141
1142         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1143         if (ret < 0)
1144                 goto out;
1145
1146         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1147         if (ret < 0)
1148                 goto out;
1149
1150         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1151                 ret = -EINVAL;
1152                 goto out;
1153         }
1154
1155         buf->has_data = true;
1156         buf->dirty = false;
1157
1158         return 0;
1159
1160 out:
1161         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1162         return ret;
1163 }
1164
1165 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1166                                             struct bq27xxx_dm_buf *buf,
1167                                             enum bq27xxx_dm_reg_id reg_id,
1168                                             unsigned int val)
1169 {
1170         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1171         const char *str = bq27xxx_dm_reg_name[reg_id];
1172         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1173
1174         if (prev == NULL) {
1175                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1176                 return;
1177         }
1178
1179         if (reg->bytes != 2) {
1180                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1181                 return;
1182         }
1183
1184         if (!buf->has_data)
1185                 return;
1186
1187         if (be16_to_cpup(prev) == val) {
1188                 dev_info(di->dev, "%s has %u\n", str, val);
1189                 return;
1190         }
1191
1192 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1193         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1194 #else
1195         if (!(di->opts & BQ27XXX_O_RAM)) {
1196 #endif
1197                 /* devicetree and NVM differ; defer to NVM */
1198                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1199 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1200                          "by dt_monitored_battery_updates_nvm=0"
1201 #else
1202                          "for flash/NVM data memory"
1203 #endif
1204                          "\n", str, be16_to_cpup(prev), val);
1205                 return;
1206         }
1207
1208         dev_info(di->dev, "update %s to %u\n", str, val);
1209
1210         *prev = cpu_to_be16(val);
1211         buf->dirty = true;
1212 }
1213
1214 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1215 {
1216         const int limit = 100;
1217         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1218         int ret, try = limit;
1219
1220         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1221         if (ret < 0)
1222                 return ret;
1223
1224         do {
1225                 BQ27XXX_MSLEEP(25);
1226                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1227                 if (ret < 0)
1228                         return ret;
1229         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1230
1231         if (!try && di->chip != BQ27425) { // 425 has a bug
1232                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1233                 return -EINVAL;
1234         }
1235
1236         if (limit - try > 3)
1237                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1238
1239         return 0;
1240 }
1241
1242 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1243 {
1244         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1245         if (ret < 0 && ret != -EINVAL)
1246                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1247
1248         return ret;
1249 }
1250
1251 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1252 {
1253         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1254         if (ret < 0 && ret != -EINVAL)
1255                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1256
1257         return ret;
1258 }
1259
1260 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1261                                           struct bq27xxx_dm_buf *buf)
1262 {
1263         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1264         int ret;
1265
1266         if (!buf->dirty)
1267                 return 0;
1268
1269         if (cfgup) {
1270                 ret = bq27xxx_battery_set_cfgupdate(di);
1271                 if (ret < 0)
1272                         return ret;
1273         }
1274
1275         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1276         if (ret < 0)
1277                 goto out;
1278
1279         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1280         if (ret < 0)
1281                 goto out;
1282
1283         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1284         if (ret < 0)
1285                 goto out;
1286
1287         BQ27XXX_MSLEEP(1);
1288
1289         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1290         if (ret < 0)
1291                 goto out;
1292
1293         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1294                             bq27xxx_battery_checksum_dm_block(buf), true);
1295         if (ret < 0)
1296                 goto out;
1297
1298         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1299          * corruption on the '425 chip (and perhaps others), which can damage
1300          * the chip.
1301          */
1302
1303         if (cfgup) {
1304                 BQ27XXX_MSLEEP(1);
1305                 ret = bq27xxx_battery_soft_reset(di);
1306                 if (ret < 0)
1307                         return ret;
1308         } else {
1309                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1310         }
1311
1312         buf->dirty = false;
1313
1314         return 0;
1315
1316 out:
1317         if (cfgup)
1318                 bq27xxx_battery_soft_reset(di);
1319
1320         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1321         return ret;
1322 }
1323
1324 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1325                                        struct power_supply_battery_info *info)
1326 {
1327         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1328         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1329         bool updated;
1330
1331         if (bq27xxx_battery_unseal(di) < 0)
1332                 return;
1333
1334         if (info->charge_full_design_uah != -EINVAL &&
1335             info->energy_full_design_uwh != -EINVAL) {
1336                 bq27xxx_battery_read_dm_block(di, &bd);
1337                 /* assume design energy & capacity are in same block */
1338                 bq27xxx_battery_update_dm_block(di, &bd,
1339                                         BQ27XXX_DM_DESIGN_CAPACITY,
1340                                         info->charge_full_design_uah / 1000);
1341                 bq27xxx_battery_update_dm_block(di, &bd,
1342                                         BQ27XXX_DM_DESIGN_ENERGY,
1343                                         info->energy_full_design_uwh / 1000);
1344         }
1345
1346         if (info->voltage_min_design_uv != -EINVAL) {
1347                 bool same = bd.class == bt.class && bd.block == bt.block;
1348                 if (!same)
1349                         bq27xxx_battery_read_dm_block(di, &bt);
1350                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1351                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1352                                         info->voltage_min_design_uv / 1000);
1353         }
1354
1355         updated = bd.dirty || bt.dirty;
1356
1357         bq27xxx_battery_write_dm_block(di, &bd);
1358         bq27xxx_battery_write_dm_block(di, &bt);
1359
1360         bq27xxx_battery_seal(di);
1361
1362         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1363                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1364                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1365         }
1366         /* assume bq27xxx_battery_update() is called hereafter */
1367 }
1368
1369 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1370 {
1371         struct power_supply_battery_info info = {};
1372         unsigned int min, max;
1373
1374         if (power_supply_get_battery_info(di->bat, &info) < 0)
1375                 return;
1376
1377         if (!di->dm_regs) {
1378                 dev_warn(di->dev, "data memory update not supported for chip\n");
1379                 return;
1380         }
1381
1382         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1383                 if (info.energy_full_design_uwh == -EINVAL)
1384                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1385                 else if (info.charge_full_design_uah == -EINVAL)
1386                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1387         }
1388
1389         /* assume min == 0 */
1390         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1391         if (info.energy_full_design_uwh > max * 1000) {
1392                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1393                         info.energy_full_design_uwh);
1394                 info.energy_full_design_uwh = -EINVAL;
1395         }
1396
1397         /* assume min == 0 */
1398         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1399         if (info.charge_full_design_uah > max * 1000) {
1400                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1401                         info.charge_full_design_uah);
1402                 info.charge_full_design_uah = -EINVAL;
1403         }
1404
1405         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1406         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1407         if ((info.voltage_min_design_uv < min * 1000 ||
1408              info.voltage_min_design_uv > max * 1000) &&
1409              info.voltage_min_design_uv != -EINVAL) {
1410                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1411                         info.voltage_min_design_uv);
1412                 info.voltage_min_design_uv = -EINVAL;
1413         }
1414
1415         if ((info.energy_full_design_uwh != -EINVAL &&
1416              info.charge_full_design_uah != -EINVAL) ||
1417              info.voltage_min_design_uv  != -EINVAL)
1418                 bq27xxx_battery_set_config(di, &info);
1419 }
1420
1421 /*
1422  * Return the battery State-of-Charge
1423  * Or < 0 if something fails.
1424  */
1425 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1426 {
1427         int soc;
1428
1429         if (di->opts & BQ27XXX_O_ZERO)
1430                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1431         else
1432                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1433
1434         if (soc < 0)
1435                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1436
1437         return soc;
1438 }
1439
1440 /*
1441  * Return a battery charge value in µAh
1442  * Or < 0 if something fails.
1443  */
1444 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1445 {
1446         int charge;
1447
1448         charge = bq27xxx_read(di, reg, false);
1449         if (charge < 0) {
1450                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1451                         reg, charge);
1452                 return charge;
1453         }
1454
1455         if (di->opts & BQ27XXX_O_ZERO)
1456                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1457         else
1458                 charge *= 1000;
1459
1460         return charge;
1461 }
1462
1463 /*
1464  * Return the battery Nominal available capacity in µAh
1465  * Or < 0 if something fails.
1466  */
1467 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1468 {
1469         int flags;
1470
1471         if (di->opts & BQ27XXX_O_ZERO) {
1472                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1473                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1474                         return -ENODATA;
1475         }
1476
1477         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1478 }
1479
1480 /*
1481  * Return the battery Full Charge Capacity in µAh
1482  * Or < 0 if something fails.
1483  */
1484 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1485 {
1486         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1487 }
1488
1489 /*
1490  * Return the Design Capacity in µAh
1491  * Or < 0 if something fails.
1492  */
1493 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1494 {
1495         int dcap;
1496
1497         if (di->opts & BQ27XXX_O_ZERO)
1498                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1499         else
1500                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1501
1502         if (dcap < 0) {
1503                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1504                 return dcap;
1505         }
1506
1507         if (di->opts & BQ27XXX_O_ZERO)
1508                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1509         else
1510                 dcap *= 1000;
1511
1512         return dcap;
1513 }
1514
1515 /*
1516  * Return the battery Available energy in µWh
1517  * Or < 0 if something fails.
1518  */
1519 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1520 {
1521         int ae;
1522
1523         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1524         if (ae < 0) {
1525                 dev_dbg(di->dev, "error reading available energy\n");
1526                 return ae;
1527         }
1528
1529         if (di->opts & BQ27XXX_O_ZERO)
1530                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1531         else
1532                 ae *= 1000;
1533
1534         return ae;
1535 }
1536
1537 /*
1538  * Return the battery temperature in tenths of degree Kelvin
1539  * Or < 0 if something fails.
1540  */
1541 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1542 {
1543         int temp;
1544
1545         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1546         if (temp < 0) {
1547                 dev_err(di->dev, "error reading temperature\n");
1548                 return temp;
1549         }
1550
1551         if (di->opts & BQ27XXX_O_ZERO)
1552                 temp = 5 * temp / 2;
1553
1554         return temp;
1555 }
1556
1557 /*
1558  * Return the battery Cycle count total
1559  * Or < 0 if something fails.
1560  */
1561 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1562 {
1563         int cyct;
1564
1565         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1566         if (cyct < 0)
1567                 dev_err(di->dev, "error reading cycle count total\n");
1568
1569         return cyct;
1570 }
1571
1572 /*
1573  * Read a time register.
1574  * Return < 0 if something fails.
1575  */
1576 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1577 {
1578         int tval;
1579
1580         tval = bq27xxx_read(di, reg, false);
1581         if (tval < 0) {
1582                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1583                         reg, tval);
1584                 return tval;
1585         }
1586
1587         if (tval == 65535)
1588                 return -ENODATA;
1589
1590         return tval * 60;
1591 }
1592
1593 /*
1594  * Read an average power register.
1595  * Return < 0 if something fails.
1596  */
1597 static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
1598 {
1599         int tval;
1600
1601         tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1602         if (tval < 0) {
1603                 dev_err(di->dev, "error reading average power register  %02x: %d\n",
1604                         BQ27XXX_REG_AP, tval);
1605                 return tval;
1606         }
1607
1608         if (di->opts & BQ27XXX_O_ZERO)
1609                 return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1610         else
1611                 return tval;
1612 }
1613
1614 /*
1615  * Returns true if a battery over temperature condition is detected
1616  */
1617 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1618 {
1619         if (di->opts & BQ27XXX_O_OTDC)
1620                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1621         if (di->opts & BQ27XXX_O_UTOT)
1622                 return flags & BQ27XXX_FLAG_OT;
1623
1624         return false;
1625 }
1626
1627 /*
1628  * Returns true if a battery under temperature condition is detected
1629  */
1630 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1631 {
1632         if (di->opts & BQ27XXX_O_UTOT)
1633                 return flags & BQ27XXX_FLAG_UT;
1634
1635         return false;
1636 }
1637
1638 /*
1639  * Returns true if a low state of charge condition is detected
1640  */
1641 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1642 {
1643         if (di->opts & BQ27XXX_O_ZERO)
1644                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1645         else if (di->opts & BQ27Z561_O_BITS)
1646                 return flags & BQ27Z561_FLAG_FDC;
1647         else
1648                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1649 }
1650
1651 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1652 {
1653         /* Unlikely but important to return first */
1654         if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
1655                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1656         if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
1657                 return POWER_SUPPLY_HEALTH_COLD;
1658         if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
1659                 return POWER_SUPPLY_HEALTH_DEAD;
1660
1661         return POWER_SUPPLY_HEALTH_GOOD;
1662 }
1663
1664 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1665 {
1666         struct bq27xxx_reg_cache cache = {0, };
1667         bool has_ci_flag = di->opts & BQ27XXX_O_ZERO;
1668         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1669
1670         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1671         if ((cache.flags & 0xff) == 0xff)
1672                 cache.flags = -1; /* read error */
1673         if (cache.flags >= 0) {
1674                 cache.temperature = bq27xxx_battery_read_temperature(di);
1675                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1676                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1677                         cache.capacity = -ENODATA;
1678                         cache.energy = -ENODATA;
1679                         cache.time_to_empty = -ENODATA;
1680                         cache.time_to_empty_avg = -ENODATA;
1681                         cache.time_to_full = -ENODATA;
1682                         cache.charge_full = -ENODATA;
1683                         cache.health = -ENODATA;
1684                 } else {
1685                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1686                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1687                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1688                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1689                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1690                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1691
1692                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1693                         cache.capacity = bq27xxx_battery_read_soc(di);
1694                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1695                                 cache.energy = bq27xxx_battery_read_energy(di);
1696                         di->cache.flags = cache.flags;
1697                         cache.health = bq27xxx_battery_read_health(di);
1698                 }
1699                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1700                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1701                 if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
1702                         cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
1703
1704                 /* We only have to read charge design full once */
1705                 if (di->charge_design_full <= 0)
1706                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1707         }
1708
1709         if ((di->cache.capacity != cache.capacity) ||
1710             (di->cache.flags != cache.flags))
1711                 power_supply_changed(di->bat);
1712
1713         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1714                 di->cache = cache;
1715
1716         di->last_update = jiffies;
1717 }
1718 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1719
1720 static void bq27xxx_battery_poll(struct work_struct *work)
1721 {
1722         struct bq27xxx_device_info *di =
1723                         container_of(work, struct bq27xxx_device_info,
1724                                      work.work);
1725
1726         bq27xxx_battery_update(di);
1727
1728         if (poll_interval > 0)
1729                 schedule_delayed_work(&di->work, poll_interval * HZ);
1730 }
1731
1732 /*
1733  * Return the battery average current in µA
1734  * Note that current can be negative signed as well
1735  * Or 0 if something fails.
1736  */
1737 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1738                                    union power_supply_propval *val)
1739 {
1740         int curr;
1741         int flags;
1742
1743         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1744         if (curr < 0) {
1745                 dev_err(di->dev, "error reading current\n");
1746                 return curr;
1747         }
1748
1749         if (di->opts & BQ27XXX_O_ZERO) {
1750                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1751                 if (flags & BQ27000_FLAG_CHGS) {
1752                         dev_dbg(di->dev, "negative current!\n");
1753                         curr = -curr;
1754                 }
1755
1756                 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1757         } else {
1758                 /* Other gauges return signed value */
1759                 val->intval = (int)((s16)curr) * 1000;
1760         }
1761
1762         return 0;
1763 }
1764
1765 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1766                                   union power_supply_propval *val)
1767 {
1768         int status;
1769
1770         if (di->opts & BQ27XXX_O_ZERO) {
1771                 if (di->cache.flags & BQ27000_FLAG_FC)
1772                         status = POWER_SUPPLY_STATUS_FULL;
1773                 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1774                         status = POWER_SUPPLY_STATUS_CHARGING;
1775                 else if (power_supply_am_i_supplied(di->bat) > 0)
1776                         status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1777                 else
1778                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1779         } else if (di->opts & BQ27Z561_O_BITS) {
1780                 if (di->cache.flags & BQ27Z561_FLAG_FC)
1781                         status = POWER_SUPPLY_STATUS_FULL;
1782                 else if (di->cache.flags & BQ27Z561_FLAG_DIS_CH)
1783                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1784                 else
1785                         status = POWER_SUPPLY_STATUS_CHARGING;
1786         } else {
1787                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1788                         status = POWER_SUPPLY_STATUS_FULL;
1789                 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1790                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1791                 else
1792                         status = POWER_SUPPLY_STATUS_CHARGING;
1793         }
1794
1795         val->intval = status;
1796
1797         return 0;
1798 }
1799
1800 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1801                                           union power_supply_propval *val)
1802 {
1803         int level;
1804
1805         if (di->opts & BQ27XXX_O_ZERO) {
1806                 if (di->cache.flags & BQ27000_FLAG_FC)
1807                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1808                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1809                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1810                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1811                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1812                 else
1813                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1814         } else if (di->opts & BQ27Z561_O_BITS) {
1815                 if (di->cache.flags & BQ27Z561_FLAG_FC)
1816                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1817                 else if (di->cache.flags & BQ27Z561_FLAG_FDC)
1818                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1819                 else
1820                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1821         } else {
1822                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1823                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1824                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1825                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1826                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1827                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1828                 else
1829                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1830         }
1831
1832         val->intval = level;
1833
1834         return 0;
1835 }
1836
1837 /*
1838  * Return the battery Voltage in millivolts
1839  * Or < 0 if something fails.
1840  */
1841 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1842                                    union power_supply_propval *val)
1843 {
1844         int volt;
1845
1846         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1847         if (volt < 0) {
1848                 dev_err(di->dev, "error reading voltage\n");
1849                 return volt;
1850         }
1851
1852         val->intval = volt * 1000;
1853
1854         return 0;
1855 }
1856
1857 static int bq27xxx_simple_value(int value,
1858                                 union power_supply_propval *val)
1859 {
1860         if (value < 0)
1861                 return value;
1862
1863         val->intval = value;
1864
1865         return 0;
1866 }
1867
1868 static int bq27xxx_battery_get_property(struct power_supply *psy,
1869                                         enum power_supply_property psp,
1870                                         union power_supply_propval *val)
1871 {
1872         int ret = 0;
1873         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1874
1875         mutex_lock(&di->lock);
1876         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1877                 cancel_delayed_work_sync(&di->work);
1878                 bq27xxx_battery_poll(&di->work.work);
1879         }
1880         mutex_unlock(&di->lock);
1881
1882         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1883                 return -ENODEV;
1884
1885         switch (psp) {
1886         case POWER_SUPPLY_PROP_STATUS:
1887                 ret = bq27xxx_battery_status(di, val);
1888                 break;
1889         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1890                 ret = bq27xxx_battery_voltage(di, val);
1891                 break;
1892         case POWER_SUPPLY_PROP_PRESENT:
1893                 val->intval = di->cache.flags < 0 ? 0 : 1;
1894                 break;
1895         case POWER_SUPPLY_PROP_CURRENT_NOW:
1896                 ret = bq27xxx_battery_current(di, val);
1897                 break;
1898         case POWER_SUPPLY_PROP_CAPACITY:
1899                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1900                 break;
1901         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1902                 ret = bq27xxx_battery_capacity_level(di, val);
1903                 break;
1904         case POWER_SUPPLY_PROP_TEMP:
1905                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1906                 if (ret == 0)
1907                         val->intval -= 2731; /* convert decidegree k to c */
1908                 break;
1909         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1910                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1911                 break;
1912         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1913                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1914                 break;
1915         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1916                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1917                 break;
1918         case POWER_SUPPLY_PROP_TECHNOLOGY:
1919                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1920                 break;
1921         case POWER_SUPPLY_PROP_CHARGE_NOW:
1922                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1923                 break;
1924         case POWER_SUPPLY_PROP_CHARGE_FULL:
1925                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1926                 break;
1927         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1928                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1929                 break;
1930         /*
1931          * TODO: Implement these to make registers set from
1932          * power_supply_battery_info visible in sysfs.
1933          */
1934         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1935         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1936                 return -EINVAL;
1937         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1938                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1939                 break;
1940         case POWER_SUPPLY_PROP_ENERGY_NOW:
1941                 ret = bq27xxx_simple_value(di->cache.energy, val);
1942                 break;
1943         case POWER_SUPPLY_PROP_POWER_AVG:
1944                 ret = bq27xxx_simple_value(di->cache.power_avg, val);
1945                 break;
1946         case POWER_SUPPLY_PROP_HEALTH:
1947                 ret = bq27xxx_simple_value(di->cache.health, val);
1948                 break;
1949         case POWER_SUPPLY_PROP_MANUFACTURER:
1950                 val->strval = BQ27XXX_MANUFACTURER;
1951                 break;
1952         default:
1953                 return -EINVAL;
1954         }
1955
1956         return ret;
1957 }
1958
1959 static void bq27xxx_external_power_changed(struct power_supply *psy)
1960 {
1961         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1962
1963         cancel_delayed_work_sync(&di->work);
1964         schedule_delayed_work(&di->work, 0);
1965 }
1966
1967 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1968 {
1969         struct power_supply_desc *psy_desc;
1970         struct power_supply_config psy_cfg = {
1971                 .of_node = di->dev->of_node,
1972                 .drv_data = di,
1973         };
1974
1975         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1976         mutex_init(&di->lock);
1977
1978         di->regs       = bq27xxx_chip_data[di->chip].regs;
1979         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
1980         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
1981         di->opts       = bq27xxx_chip_data[di->chip].opts;
1982
1983         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1984         if (!psy_desc)
1985                 return -ENOMEM;
1986
1987         psy_desc->name = di->name;
1988         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1989         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
1990         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
1991         psy_desc->get_property = bq27xxx_battery_get_property;
1992         psy_desc->external_power_changed = bq27xxx_external_power_changed;
1993
1994         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1995         if (IS_ERR(di->bat)) {
1996                 if (PTR_ERR(di->bat) == -EPROBE_DEFER)
1997                         dev_dbg(di->dev, "failed to register battery, deferring probe\n");
1998                 else
1999                         dev_err(di->dev, "failed to register battery\n");
2000                 return PTR_ERR(di->bat);
2001         }
2002
2003         bq27xxx_battery_settings(di);
2004         bq27xxx_battery_update(di);
2005
2006         mutex_lock(&bq27xxx_list_lock);
2007         list_add(&di->list, &bq27xxx_battery_devices);
2008         mutex_unlock(&bq27xxx_list_lock);
2009
2010         return 0;
2011 }
2012 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
2013
2014 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
2015 {
2016         /*
2017          * power_supply_unregister call bq27xxx_battery_get_property which
2018          * call bq27xxx_battery_poll.
2019          * Make sure that bq27xxx_battery_poll will not call
2020          * schedule_delayed_work again after unregister (which cause OOPS).
2021          */
2022         poll_interval = 0;
2023
2024         cancel_delayed_work_sync(&di->work);
2025
2026         power_supply_unregister(di->bat);
2027
2028         mutex_lock(&bq27xxx_list_lock);
2029         list_del(&di->list);
2030         mutex_unlock(&bq27xxx_list_lock);
2031
2032         mutex_destroy(&di->lock);
2033 }
2034 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
2035
2036 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
2037 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
2038 MODULE_LICENSE("GPL");