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-g1
  30  * http://www.ti.com/product/bq27520-g2
  31  * http://www.ti.com/product/bq27520-g3
  32  * http://www.ti.com/product/bq27520-g4
  33  * http://www.ti.com/product/bq27530-g1
  34  * http://www.ti.com/product/bq27531-g1
  35  * http://www.ti.com/product/bq27541-g1
  36  * http://www.ti.com/product/bq27542-g1
  37  * http://www.ti.com/product/bq27546-g1
  38  * http://www.ti.com/product/bq27742-g1
  39  * http://www.ti.com/product/bq27545-g1
  40  * http://www.ti.com/product/bq27421-g1
  41  * http://www.ti.com/product/bq27425-g1
  42  * http://www.ti.com/product/bq27426
  43  * http://www.ti.com/product/bq27411-g1
  44  * http://www.ti.com/product/bq27441-g1
  45  * http://www.ti.com/product/bq27621-g1
  46  */
  47
  48 #include <linux/device.h>
  49 #include <linux/module.h>
  50 #include <linux/mutex.h>
  51 #include <linux/param.h>
  52 #include <linux/jiffies.h>
  53 #include <linux/workqueue.h>
  54 #include <linux/delay.h>
  55 #include <linux/platform_device.h>
  56 #include <linux/power_supply.h>
  57 #include <linux/slab.h>
  58 #include <linux/of.h>
  59
  60 #include <linux/power/bq27xxx_battery.h>
  61
  62 #define BQ27XXX_MANUFACTURER    "Texas Instruments"
  63
  64 /* BQ27XXX Flags */
  65 #define BQ27XXX_FLAG_DSC        BIT(0)
  66 #define BQ27XXX_FLAG_SOCF       BIT(1) /* State-of-Charge threshold final */
  67 #define BQ27XXX_FLAG_SOC1       BIT(2) /* State-of-Charge threshold 1 */
  68 #define BQ27XXX_FLAG_CFGUP      BIT(4)
  69 #define BQ27XXX_FLAG_FC         BIT(9)
  70 #define BQ27XXX_FLAG_OTD        BIT(14)
  71 #define BQ27XXX_FLAG_OTC        BIT(15)
  72 #define BQ27XXX_FLAG_UT         BIT(14)
  73 #define BQ27XXX_FLAG_OT         BIT(15)
  74
  75 /* BQ27000 has different layout for Flags register */
  76 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  77 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  78 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  79 #define BQ27000_FLAG_FC         BIT(5)
  80 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  81
  82 /* control register params */
  83 #define BQ27XXX_SEALED                  0x20
  84 #define BQ27XXX_SET_CFGUPDATE           0x13
  85 #define BQ27XXX_SOFT_RESET              0x42
  86 #define BQ27XXX_RESET                   0x41
  87
  88 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  89 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  90 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  91
  92 #define INVALID_REG_ADDR        0xff
  93
  94 /*
  95  * bq27xxx_reg_index - Register names
  96  *
  97  * These are indexes into a device's register mapping array.
  98  */
  99
 100 enum bq27xxx_reg_index {
 101         BQ27XXX_REG_CTRL = 0,   /* Control */
 102         BQ27XXX_REG_TEMP,       /* Temperature */
 103         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
 104         BQ27XXX_REG_VOLT,       /* Voltage */
 105         BQ27XXX_REG_AI,         /* Average Current */
 106         BQ27XXX_REG_FLAGS,      /* Flags */
 107         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 108         BQ27XXX_REG_TTF,        /* Time-to-Full */
 109         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 110         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 111         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 112         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 113         BQ27XXX_REG_CYCT,       /* Cycle Count */
 114         BQ27XXX_REG_AE,         /* Available Energy */
 115         BQ27XXX_REG_SOC,        /* State-of-Charge */
 116         BQ27XXX_REG_DCAP,       /* Design Capacity */
 117         BQ27XXX_REG_AP,         /* Average Power */
 118         BQ27XXX_DM_CTRL,        /* Block Data Control */
 119         BQ27XXX_DM_CLASS,       /* Data Class */
 120         BQ27XXX_DM_BLOCK,       /* Data Block */
 121         BQ27XXX_DM_DATA,        /* Block Data */
 122         BQ27XXX_DM_CKSUM,       /* Block Data Checksum */
 123         BQ27XXX_REG_MAX,        /* sentinel */
 124 };
 125
 126 #define BQ27XXX_DM_REG_ROWS \
 127         [BQ27XXX_DM_CTRL] = 0x61,  \
 128         [BQ27XXX_DM_CLASS] = 0x3e, \
 129         [BQ27XXX_DM_BLOCK] = 0x3f, \
 130         [BQ27XXX_DM_DATA] = 0x40,  \
 131         [BQ27XXX_DM_CKSUM] = 0x60
 132
 133 /* Register mappings */
 134 static u8
 135         bq27000_regs[BQ27XXX_REG_MAX] = {
 136                 [BQ27XXX_REG_CTRL] = 0x00,
 137                 [BQ27XXX_REG_TEMP] = 0x06,
 138                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 139                 [BQ27XXX_REG_VOLT] = 0x08,
 140                 [BQ27XXX_REG_AI] = 0x14,
 141                 [BQ27XXX_REG_FLAGS] = 0x0a,
 142                 [BQ27XXX_REG_TTE] = 0x16,
 143                 [BQ27XXX_REG_TTF] = 0x18,
 144                 [BQ27XXX_REG_TTES] = 0x1c,
 145                 [BQ27XXX_REG_TTECP] = 0x26,
 146                 [BQ27XXX_REG_NAC] = 0x0c,
 147                 [BQ27XXX_REG_FCC] = 0x12,
 148                 [BQ27XXX_REG_CYCT] = 0x2a,
 149                 [BQ27XXX_REG_AE] = 0x22,
 150                 [BQ27XXX_REG_SOC] = 0x0b,
 151                 [BQ27XXX_REG_DCAP] = 0x76,
 152                 [BQ27XXX_REG_AP] = 0x24,
 153                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 154                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 155                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 156                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 157                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 158         },
 159         bq27010_regs[BQ27XXX_REG_MAX] = {
 160                 [BQ27XXX_REG_CTRL] = 0x00,
 161                 [BQ27XXX_REG_TEMP] = 0x06,
 162                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 163                 [BQ27XXX_REG_VOLT] = 0x08,
 164                 [BQ27XXX_REG_AI] = 0x14,
 165                 [BQ27XXX_REG_FLAGS] = 0x0a,
 166                 [BQ27XXX_REG_TTE] = 0x16,
 167                 [BQ27XXX_REG_TTF] = 0x18,
 168                 [BQ27XXX_REG_TTES] = 0x1c,
 169                 [BQ27XXX_REG_TTECP] = 0x26,
 170                 [BQ27XXX_REG_NAC] = 0x0c,
 171                 [BQ27XXX_REG_FCC] = 0x12,
 172                 [BQ27XXX_REG_CYCT] = 0x2a,
 173                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 174                 [BQ27XXX_REG_SOC] = 0x0b,
 175                 [BQ27XXX_REG_DCAP] = 0x76,
 176                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 177                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 178                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 179                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 180                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 181                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 182         },
 183         bq2750x_regs[BQ27XXX_REG_MAX] = {
 184                 [BQ27XXX_REG_CTRL] = 0x00,
 185                 [BQ27XXX_REG_TEMP] = 0x06,
 186                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 187                 [BQ27XXX_REG_VOLT] = 0x08,
 188                 [BQ27XXX_REG_AI] = 0x14,
 189                 [BQ27XXX_REG_FLAGS] = 0x0a,
 190                 [BQ27XXX_REG_TTE] = 0x16,
 191                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 192                 [BQ27XXX_REG_TTES] = 0x1a,
 193                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 194                 [BQ27XXX_REG_NAC] = 0x0c,
 195                 [BQ27XXX_REG_FCC] = 0x12,
 196                 [BQ27XXX_REG_CYCT] = 0x2a,
 197                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 198                 [BQ27XXX_REG_SOC] = 0x2c,
 199                 [BQ27XXX_REG_DCAP] = 0x3c,
 200                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 201                 BQ27XXX_DM_REG_ROWS,
 202         },
 203 #define bq2751x_regs bq27510g3_regs
 204 #define bq2752x_regs bq27510g3_regs
 205         bq27500_regs[BQ27XXX_REG_MAX] = {
 206                 [BQ27XXX_REG_CTRL] = 0x00,
 207                 [BQ27XXX_REG_TEMP] = 0x06,
 208                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 209                 [BQ27XXX_REG_VOLT] = 0x08,
 210                 [BQ27XXX_REG_AI] = 0x14,
 211                 [BQ27XXX_REG_FLAGS] = 0x0a,
 212                 [BQ27XXX_REG_TTE] = 0x16,
 213                 [BQ27XXX_REG_TTF] = 0x18,
 214                 [BQ27XXX_REG_TTES] = 0x1c,
 215                 [BQ27XXX_REG_TTECP] = 0x26,
 216                 [BQ27XXX_REG_NAC] = 0x0c,
 217                 [BQ27XXX_REG_FCC] = 0x12,
 218                 [BQ27XXX_REG_CYCT] = 0x2a,
 219                 [BQ27XXX_REG_AE] = 0x22,
 220                 [BQ27XXX_REG_SOC] = 0x2c,
 221                 [BQ27XXX_REG_DCAP] = 0x3c,
 222                 [BQ27XXX_REG_AP] = 0x24,
 223                 BQ27XXX_DM_REG_ROWS,
 224         },
 225 #define bq27510g1_regs bq27500_regs
 226 #define bq27510g2_regs bq27500_regs
 227         bq27510g3_regs[BQ27XXX_REG_MAX] = {
 228                 [BQ27XXX_REG_CTRL] = 0x00,
 229                 [BQ27XXX_REG_TEMP] = 0x06,
 230                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 231                 [BQ27XXX_REG_VOLT] = 0x08,
 232                 [BQ27XXX_REG_AI] = 0x14,
 233                 [BQ27XXX_REG_FLAGS] = 0x0a,
 234                 [BQ27XXX_REG_TTE] = 0x16,
 235                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 236                 [BQ27XXX_REG_TTES] = 0x1a,
 237                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 238                 [BQ27XXX_REG_NAC] = 0x0c,
 239                 [BQ27XXX_REG_FCC] = 0x12,
 240                 [BQ27XXX_REG_CYCT] = 0x1e,
 241                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 242                 [BQ27XXX_REG_SOC] = 0x20,
 243                 [BQ27XXX_REG_DCAP] = 0x2e,
 244                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 245                 BQ27XXX_DM_REG_ROWS,
 246         },
 247         bq27520g1_regs[BQ27XXX_REG_MAX] = {
 248                 [BQ27XXX_REG_CTRL] = 0x00,
 249                 [BQ27XXX_REG_TEMP] = 0x06,
 250                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 251                 [BQ27XXX_REG_VOLT] = 0x08,
 252                 [BQ27XXX_REG_AI] = 0x14,
 253                 [BQ27XXX_REG_FLAGS] = 0x0a,
 254                 [BQ27XXX_REG_TTE] = 0x16,
 255                 [BQ27XXX_REG_TTF] = 0x18,
 256                 [BQ27XXX_REG_TTES] = 0x1c,
 257                 [BQ27XXX_REG_TTECP] = 0x26,
 258                 [BQ27XXX_REG_NAC] = 0x0c,
 259                 [BQ27XXX_REG_FCC] = 0x12,
 260                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 261                 [BQ27XXX_REG_AE] = 0x22,
 262                 [BQ27XXX_REG_SOC] = 0x2c,
 263                 [BQ27XXX_REG_DCAP] = 0x3c,
 264                 [BQ27XXX_REG_AP] = 0x24,
 265                 BQ27XXX_DM_REG_ROWS,
 266         },
 267         bq27520g2_regs[BQ27XXX_REG_MAX] = {
 268                 [BQ27XXX_REG_CTRL] = 0x00,
 269                 [BQ27XXX_REG_TEMP] = 0x06,
 270                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 271                 [BQ27XXX_REG_VOLT] = 0x08,
 272                 [BQ27XXX_REG_AI] = 0x14,
 273                 [BQ27XXX_REG_FLAGS] = 0x0a,
 274                 [BQ27XXX_REG_TTE] = 0x16,
 275                 [BQ27XXX_REG_TTF] = 0x18,
 276                 [BQ27XXX_REG_TTES] = 0x1c,
 277                 [BQ27XXX_REG_TTECP] = 0x26,
 278                 [BQ27XXX_REG_NAC] = 0x0c,
 279                 [BQ27XXX_REG_FCC] = 0x12,
 280                 [BQ27XXX_REG_CYCT] = 0x2a,
 281                 [BQ27XXX_REG_AE] = 0x22,
 282                 [BQ27XXX_REG_SOC] = 0x2c,
 283                 [BQ27XXX_REG_DCAP] = 0x3c,
 284                 [BQ27XXX_REG_AP] = 0x24,
 285                 BQ27XXX_DM_REG_ROWS,
 286         },
 287         bq27520g3_regs[BQ27XXX_REG_MAX] = {
 288                 [BQ27XXX_REG_CTRL] = 0x00,
 289                 [BQ27XXX_REG_TEMP] = 0x06,
 290                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 291                 [BQ27XXX_REG_VOLT] = 0x08,
 292                 [BQ27XXX_REG_AI] = 0x14,
 293                 [BQ27XXX_REG_FLAGS] = 0x0a,
 294                 [BQ27XXX_REG_TTE] = 0x16,
 295                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 296                 [BQ27XXX_REG_TTES] = 0x1c,
 297                 [BQ27XXX_REG_TTECP] = 0x26,
 298                 [BQ27XXX_REG_NAC] = 0x0c,
 299                 [BQ27XXX_REG_FCC] = 0x12,
 300                 [BQ27XXX_REG_CYCT] = 0x2a,
 301                 [BQ27XXX_REG_AE] = 0x22,
 302                 [BQ27XXX_REG_SOC] = 0x2c,
 303                 [BQ27XXX_REG_DCAP] = 0x3c,
 304                 [BQ27XXX_REG_AP] = 0x24,
 305                 BQ27XXX_DM_REG_ROWS,
 306         },
 307         bq27520g4_regs[BQ27XXX_REG_MAX] = {
 308                 [BQ27XXX_REG_CTRL] = 0x00,
 309                 [BQ27XXX_REG_TEMP] = 0x06,
 310                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 311                 [BQ27XXX_REG_VOLT] = 0x08,
 312                 [BQ27XXX_REG_AI] = 0x14,
 313                 [BQ27XXX_REG_FLAGS] = 0x0a,
 314                 [BQ27XXX_REG_TTE] = 0x16,
 315                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 316                 [BQ27XXX_REG_TTES] = 0x1c,
 317                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 318                 [BQ27XXX_REG_NAC] = 0x0c,
 319                 [BQ27XXX_REG_FCC] = 0x12,
 320                 [BQ27XXX_REG_CYCT] = 0x1e,
 321                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 322                 [BQ27XXX_REG_SOC] = 0x20,
 323                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 324                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 325                 BQ27XXX_DM_REG_ROWS,
 326         },
 327         bq27521_regs[BQ27XXX_REG_MAX] = {
 328                 [BQ27XXX_REG_CTRL] = 0x02,
 329                 [BQ27XXX_REG_TEMP] = 0x0a,
 330                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 331                 [BQ27XXX_REG_VOLT] = 0x0c,
 332                 [BQ27XXX_REG_AI] = 0x0e,
 333                 [BQ27XXX_REG_FLAGS] = 0x08,
 334                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 335                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 336                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 337                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 338                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 339                 [BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
 340                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 341                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 342                 [BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
 343                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 344                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 345                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 346                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 347                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 348                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 349                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 350         },
 351         bq27530_regs[BQ27XXX_REG_MAX] = {
 352                 [BQ27XXX_REG_CTRL] = 0x00,
 353                 [BQ27XXX_REG_TEMP] = 0x06,
 354                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 355                 [BQ27XXX_REG_VOLT] = 0x08,
 356                 [BQ27XXX_REG_AI] = 0x14,
 357                 [BQ27XXX_REG_FLAGS] = 0x0a,
 358                 [BQ27XXX_REG_TTE] = 0x16,
 359                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 360                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 361                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 362                 [BQ27XXX_REG_NAC] = 0x0c,
 363                 [BQ27XXX_REG_FCC] = 0x12,
 364                 [BQ27XXX_REG_CYCT] = 0x2a,
 365                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 366                 [BQ27XXX_REG_SOC] = 0x2c,
 367                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 368                 [BQ27XXX_REG_AP] = 0x24,
 369                 BQ27XXX_DM_REG_ROWS,
 370         },
 371 #define bq27531_regs bq27530_regs
 372         bq27541_regs[BQ27XXX_REG_MAX] = {
 373                 [BQ27XXX_REG_CTRL] = 0x00,
 374                 [BQ27XXX_REG_TEMP] = 0x06,
 375                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 376                 [BQ27XXX_REG_VOLT] = 0x08,
 377                 [BQ27XXX_REG_AI] = 0x14,
 378                 [BQ27XXX_REG_FLAGS] = 0x0a,
 379                 [BQ27XXX_REG_TTE] = 0x16,
 380                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 381                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 382                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 383                 [BQ27XXX_REG_NAC] = 0x0c,
 384                 [BQ27XXX_REG_FCC] = 0x12,
 385                 [BQ27XXX_REG_CYCT] = 0x2a,
 386                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 387                 [BQ27XXX_REG_SOC] = 0x2c,
 388                 [BQ27XXX_REG_DCAP] = 0x3c,
 389                 [BQ27XXX_REG_AP] = 0x24,
 390                 BQ27XXX_DM_REG_ROWS,
 391         },
 392 #define bq27542_regs bq27541_regs
 393 #define bq27546_regs bq27541_regs
 394 #define bq27742_regs bq27541_regs
 395         bq27545_regs[BQ27XXX_REG_MAX] = {
 396                 [BQ27XXX_REG_CTRL] = 0x00,
 397                 [BQ27XXX_REG_TEMP] = 0x06,
 398                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 399                 [BQ27XXX_REG_VOLT] = 0x08,
 400                 [BQ27XXX_REG_AI] = 0x14,
 401                 [BQ27XXX_REG_FLAGS] = 0x0a,
 402                 [BQ27XXX_REG_TTE] = 0x16,
 403                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 404                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 405                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 406                 [BQ27XXX_REG_NAC] = 0x0c,
 407                 [BQ27XXX_REG_FCC] = 0x12,
 408                 [BQ27XXX_REG_CYCT] = 0x2a,
 409                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 410                 [BQ27XXX_REG_SOC] = 0x2c,
 411                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 412                 [BQ27XXX_REG_AP] = 0x24,
 413                 BQ27XXX_DM_REG_ROWS,
 414         },
 415         bq27421_regs[BQ27XXX_REG_MAX] = {
 416                 [BQ27XXX_REG_CTRL] = 0x00,
 417                 [BQ27XXX_REG_TEMP] = 0x02,
 418                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 419                 [BQ27XXX_REG_VOLT] = 0x04,
 420                 [BQ27XXX_REG_AI] = 0x10,
 421                 [BQ27XXX_REG_FLAGS] = 0x06,
 422                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 423                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 424                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 425                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 426                 [BQ27XXX_REG_NAC] = 0x08,
 427                 [BQ27XXX_REG_FCC] = 0x0e,
 428                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 429                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 430                 [BQ27XXX_REG_SOC] = 0x1c,
 431                 [BQ27XXX_REG_DCAP] = 0x3c,
 432                 [BQ27XXX_REG_AP] = 0x18,
 433                 BQ27XXX_DM_REG_ROWS,
 434         };
 435 #define bq27411_regs bq27421_regs
 436 #define bq27425_regs bq27421_regs
 437 #define bq27426_regs bq27421_regs
 438 #define bq27441_regs bq27421_regs
 439 #define bq27621_regs bq27421_regs
 440
 441 static enum power_supply_property bq27000_props[] = {
 442         POWER_SUPPLY_PROP_STATUS,
 443         POWER_SUPPLY_PROP_PRESENT,
 444         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 445         POWER_SUPPLY_PROP_CURRENT_NOW,
 446         POWER_SUPPLY_PROP_CAPACITY,
 447         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 448         POWER_SUPPLY_PROP_TEMP,
 449         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 450         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 451         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 452         POWER_SUPPLY_PROP_TECHNOLOGY,
 453         POWER_SUPPLY_PROP_CHARGE_FULL,
 454         POWER_SUPPLY_PROP_CHARGE_NOW,
 455         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 456         POWER_SUPPLY_PROP_CYCLE_COUNT,
 457         POWER_SUPPLY_PROP_ENERGY_NOW,
 458         POWER_SUPPLY_PROP_POWER_AVG,
 459         POWER_SUPPLY_PROP_HEALTH,
 460         POWER_SUPPLY_PROP_MANUFACTURER,
 461 };
 462
 463 static enum power_supply_property bq27010_props[] = {
 464         POWER_SUPPLY_PROP_STATUS,
 465         POWER_SUPPLY_PROP_PRESENT,
 466         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 467         POWER_SUPPLY_PROP_CURRENT_NOW,
 468         POWER_SUPPLY_PROP_CAPACITY,
 469         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 470         POWER_SUPPLY_PROP_TEMP,
 471         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 472         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 473         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 474         POWER_SUPPLY_PROP_TECHNOLOGY,
 475         POWER_SUPPLY_PROP_CHARGE_FULL,
 476         POWER_SUPPLY_PROP_CHARGE_NOW,
 477         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 478         POWER_SUPPLY_PROP_CYCLE_COUNT,
 479         POWER_SUPPLY_PROP_HEALTH,
 480         POWER_SUPPLY_PROP_MANUFACTURER,
 481 };
 482
 483 #define bq2750x_props bq27510g3_props
 484 #define bq2751x_props bq27510g3_props
 485 #define bq2752x_props bq27510g3_props
 486
 487 static enum power_supply_property bq27500_props[] = {
 488         POWER_SUPPLY_PROP_STATUS,
 489         POWER_SUPPLY_PROP_PRESENT,
 490         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 491         POWER_SUPPLY_PROP_CURRENT_NOW,
 492         POWER_SUPPLY_PROP_CAPACITY,
 493         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 494         POWER_SUPPLY_PROP_TEMP,
 495         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 496         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 497         POWER_SUPPLY_PROP_TECHNOLOGY,
 498         POWER_SUPPLY_PROP_CHARGE_FULL,
 499         POWER_SUPPLY_PROP_CHARGE_NOW,
 500         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 501         POWER_SUPPLY_PROP_CYCLE_COUNT,
 502         POWER_SUPPLY_PROP_ENERGY_NOW,
 503         POWER_SUPPLY_PROP_POWER_AVG,
 504         POWER_SUPPLY_PROP_HEALTH,
 505         POWER_SUPPLY_PROP_MANUFACTURER,
 506 };
 507 #define bq27510g1_props bq27500_props
 508 #define bq27510g2_props bq27500_props
 509
 510 static enum power_supply_property bq27510g3_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_TECHNOLOGY,
 520         POWER_SUPPLY_PROP_CHARGE_FULL,
 521         POWER_SUPPLY_PROP_CHARGE_NOW,
 522         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 523         POWER_SUPPLY_PROP_CYCLE_COUNT,
 524         POWER_SUPPLY_PROP_HEALTH,
 525         POWER_SUPPLY_PROP_MANUFACTURER,
 526 };
 527
 528 static enum power_supply_property bq27520g1_props[] = {
 529         POWER_SUPPLY_PROP_STATUS,
 530         POWER_SUPPLY_PROP_PRESENT,
 531         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 532         POWER_SUPPLY_PROP_CURRENT_NOW,
 533         POWER_SUPPLY_PROP_CAPACITY,
 534         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 535         POWER_SUPPLY_PROP_TEMP,
 536         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 537         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 538         POWER_SUPPLY_PROP_TECHNOLOGY,
 539         POWER_SUPPLY_PROP_CHARGE_FULL,
 540         POWER_SUPPLY_PROP_CHARGE_NOW,
 541         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 542         POWER_SUPPLY_PROP_ENERGY_NOW,
 543         POWER_SUPPLY_PROP_POWER_AVG,
 544         POWER_SUPPLY_PROP_HEALTH,
 545         POWER_SUPPLY_PROP_MANUFACTURER,
 546 };
 547
 548 #define bq27520g2_props bq27500_props
 549
 550 static enum power_supply_property bq27520g3_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_TECHNOLOGY,
 560         POWER_SUPPLY_PROP_CHARGE_FULL,
 561         POWER_SUPPLY_PROP_CHARGE_NOW,
 562         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 563         POWER_SUPPLY_PROP_CYCLE_COUNT,
 564         POWER_SUPPLY_PROP_ENERGY_NOW,
 565         POWER_SUPPLY_PROP_POWER_AVG,
 566         POWER_SUPPLY_PROP_HEALTH,
 567         POWER_SUPPLY_PROP_MANUFACTURER,
 568 };
 569
 570 static enum power_supply_property bq27520g4_props[] = {
 571         POWER_SUPPLY_PROP_STATUS,
 572         POWER_SUPPLY_PROP_PRESENT,
 573         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 574         POWER_SUPPLY_PROP_CURRENT_NOW,
 575         POWER_SUPPLY_PROP_CAPACITY,
 576         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 577         POWER_SUPPLY_PROP_TEMP,
 578         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 579         POWER_SUPPLY_PROP_TECHNOLOGY,
 580         POWER_SUPPLY_PROP_CHARGE_FULL,
 581         POWER_SUPPLY_PROP_CHARGE_NOW,
 582         POWER_SUPPLY_PROP_CYCLE_COUNT,
 583         POWER_SUPPLY_PROP_HEALTH,
 584         POWER_SUPPLY_PROP_MANUFACTURER,
 585 };
 586
 587 static enum power_supply_property bq27521_props[] = {
 588         POWER_SUPPLY_PROP_STATUS,
 589         POWER_SUPPLY_PROP_PRESENT,
 590         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 591         POWER_SUPPLY_PROP_CURRENT_NOW,
 592         POWER_SUPPLY_PROP_TEMP,
 593         POWER_SUPPLY_PROP_TECHNOLOGY,
 594 };
 595
 596 static enum power_supply_property bq27530_props[] = {
 597         POWER_SUPPLY_PROP_STATUS,
 598         POWER_SUPPLY_PROP_PRESENT,
 599         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 600         POWER_SUPPLY_PROP_CURRENT_NOW,
 601         POWER_SUPPLY_PROP_CAPACITY,
 602         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 603         POWER_SUPPLY_PROP_TEMP,
 604         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 605         POWER_SUPPLY_PROP_TECHNOLOGY,
 606         POWER_SUPPLY_PROP_CHARGE_FULL,
 607         POWER_SUPPLY_PROP_CHARGE_NOW,
 608         POWER_SUPPLY_PROP_POWER_AVG,
 609         POWER_SUPPLY_PROP_HEALTH,
 610         POWER_SUPPLY_PROP_CYCLE_COUNT,
 611         POWER_SUPPLY_PROP_MANUFACTURER,
 612 };
 613 #define bq27531_props bq27530_props
 614
 615 static enum power_supply_property bq27541_props[] = {
 616         POWER_SUPPLY_PROP_STATUS,
 617         POWER_SUPPLY_PROP_PRESENT,
 618         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 619         POWER_SUPPLY_PROP_CURRENT_NOW,
 620         POWER_SUPPLY_PROP_CAPACITY,
 621         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 622         POWER_SUPPLY_PROP_TEMP,
 623         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 624         POWER_SUPPLY_PROP_TECHNOLOGY,
 625         POWER_SUPPLY_PROP_CHARGE_FULL,
 626         POWER_SUPPLY_PROP_CHARGE_NOW,
 627         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 628         POWER_SUPPLY_PROP_CYCLE_COUNT,
 629         POWER_SUPPLY_PROP_POWER_AVG,
 630         POWER_SUPPLY_PROP_HEALTH,
 631         POWER_SUPPLY_PROP_MANUFACTURER,
 632 };
 633 #define bq27542_props bq27541_props
 634 #define bq27546_props bq27541_props
 635 #define bq27742_props bq27541_props
 636
 637 static enum power_supply_property bq27545_props[] = {
 638         POWER_SUPPLY_PROP_STATUS,
 639         POWER_SUPPLY_PROP_PRESENT,
 640         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 641         POWER_SUPPLY_PROP_CURRENT_NOW,
 642         POWER_SUPPLY_PROP_CAPACITY,
 643         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 644         POWER_SUPPLY_PROP_TEMP,
 645         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 646         POWER_SUPPLY_PROP_TECHNOLOGY,
 647         POWER_SUPPLY_PROP_CHARGE_FULL,
 648         POWER_SUPPLY_PROP_CHARGE_NOW,
 649         POWER_SUPPLY_PROP_HEALTH,
 650         POWER_SUPPLY_PROP_CYCLE_COUNT,
 651         POWER_SUPPLY_PROP_POWER_AVG,
 652         POWER_SUPPLY_PROP_MANUFACTURER,
 653 };
 654
 655 static enum power_supply_property bq27421_props[] = {
 656         POWER_SUPPLY_PROP_STATUS,
 657         POWER_SUPPLY_PROP_PRESENT,
 658         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 659         POWER_SUPPLY_PROP_CURRENT_NOW,
 660         POWER_SUPPLY_PROP_CAPACITY,
 661         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 662         POWER_SUPPLY_PROP_TEMP,
 663         POWER_SUPPLY_PROP_TECHNOLOGY,
 664         POWER_SUPPLY_PROP_CHARGE_FULL,
 665         POWER_SUPPLY_PROP_CHARGE_NOW,
 666         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 667         POWER_SUPPLY_PROP_MANUFACTURER,
 668 };
 669 #define bq27411_props bq27421_props
 670 #define bq27425_props bq27421_props
 671 #define bq27426_props bq27421_props
 672 #define bq27441_props bq27421_props
 673 #define bq27621_props bq27421_props
 674
 675 struct bq27xxx_dm_reg {
 676         u8 subclass_id;
 677         u8 offset;
 678         u8 bytes;
 679         u16 min, max;
 680 };
 681
 682 enum bq27xxx_dm_reg_id {
 683         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 684         BQ27XXX_DM_DESIGN_ENERGY,
 685         BQ27XXX_DM_TERMINATE_VOLTAGE,
 686 };
 687
 688 #define bq27000_dm_regs 0
 689 #define bq27010_dm_regs 0
 690 #define bq2750x_dm_regs 0
 691 #define bq2751x_dm_regs 0
 692 #define bq2752x_dm_regs 0
 693
 694 #if 0 /* not yet tested */
 695 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 696         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 10, 2,    0, 65535 },
 697         [BQ27XXX_DM_DESIGN_ENERGY]     = { }, /* missing on chip */
 698         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
 699 };
 700 #else
 701 #define bq27500_dm_regs 0
 702 #endif
 703
 704 /* todo create data memory definitions from datasheets and test on chips */
 705 #define bq27510g1_dm_regs 0
 706 #define bq27510g2_dm_regs 0
 707 #define bq27510g3_dm_regs 0
 708 #define bq27520g1_dm_regs 0
 709 #define bq27520g2_dm_regs 0
 710 #define bq27520g3_dm_regs 0
 711 #define bq27520g4_dm_regs 0
 712 #define bq27521_dm_regs 0
 713 #define bq27530_dm_regs 0
 714 #define bq27531_dm_regs 0
 715 #define bq27541_dm_regs 0
 716 #define bq27542_dm_regs 0
 717 #define bq27546_dm_regs 0
 718 #define bq27742_dm_regs 0
 719
 720 #if 0 /* not yet tested */
 721 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
 722         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 23, 2,    0, 32767 },
 723         [BQ27XXX_DM_DESIGN_ENERGY]     = { 48, 25, 2,    0, 32767 },
 724         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800,  3700 },
 725 };
 726 #else
 727 #define bq27545_dm_regs 0
 728 #endif
 729
 730 static struct bq27xxx_dm_reg bq27411_dm_regs[] = {
 731         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0, 32767 },
 732         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 733         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2800,  3700 },
 734 };
 735
 736 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
 737         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0,  8000 },
 738         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 739         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500,  3700 },
 740 };
 741
 742 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
 743         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 12, 2,    0, 32767 },
 744         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 14, 2,    0, 32767 },
 745         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800,  3700 },
 746 };
 747
 748 static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
 749         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82,  6, 2,    0,  8000 },
 750         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82,  8, 2,    0, 32767 },
 751         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 10, 2, 2500,  3700 },
 752 };
 753
 754 #if 0 /* not yet tested */
 755 #define bq27441_dm_regs bq27421_dm_regs
 756 #else
 757 #define bq27441_dm_regs 0
 758 #endif
 759
 760 #if 0 /* not yet tested */
 761 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 762         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 3, 2,    0,  8000 },
 763         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 5, 2,    0, 32767 },
 764         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500,  3700 },
 765 };
 766 #else
 767 #define bq27621_dm_regs 0
 768 #endif
 769
 770 #define BQ27XXX_O_ZERO  0x00000001
 771 #define BQ27XXX_O_OTDC  0x00000002 /* has OTC/OTD overtemperature flags */
 772 #define BQ27XXX_O_UTOT  0x00000004 /* has OT overtemperature flag */
 773 #define BQ27XXX_O_CFGUP 0x00000008
 774 #define BQ27XXX_O_RAM   0x00000010
 775
 776 #define BQ27XXX_DATA(ref, key, opt) {           \
 777         .opts = (opt),                          \
 778         .unseal_key = key,                      \
 779         .regs  = ref##_regs,                    \
 780         .dm_regs = ref##_dm_regs,               \
 781         .props = ref##_props,                   \
 782         .props_size = ARRAY_SIZE(ref##_props) }
 783
 784 static struct {
 785         u32 opts;
 786         u32 unseal_key;
 787         u8 *regs;
 788         struct bq27xxx_dm_reg *dm_regs;
 789         enum power_supply_property *props;
 790         size_t props_size;
 791 } bq27xxx_chip_data[] = {
 792         [BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO),
 793         [BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO),
 794         [BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 795         [BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 796         [BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
 797         [BQ27500]   = BQ27XXX_DATA(bq27500,   0x04143672, BQ27XXX_O_OTDC),
 798         [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0         , BQ27XXX_O_OTDC),
 799         [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0         , BQ27XXX_O_OTDC),
 800         [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0         , BQ27XXX_O_OTDC),
 801         [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0         , BQ27XXX_O_OTDC),
 802         [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 803         [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 804         [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
 805         [BQ27521]   = BQ27XXX_DATA(bq27521,   0         , 0),
 806         [BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 807         [BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
 808         [BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
 809         [BQ27542]   = BQ27XXX_DATA(bq27542,   0         , BQ27XXX_O_OTDC),
 810         [BQ27546]   = BQ27XXX_DATA(bq27546,   0         , BQ27XXX_O_OTDC),
 811         [BQ27742]   = BQ27XXX_DATA(bq27742,   0         , BQ27XXX_O_OTDC),
 812         [BQ27545]   = BQ27XXX_DATA(bq27545,   0x04143672, BQ27XXX_O_OTDC),
 813         [BQ27411]   = BQ27XXX_DATA(bq27411,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 814         [BQ27421]   = BQ27XXX_DATA(bq27421,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 815         [BQ27425]   = BQ27XXX_DATA(bq27425,   0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
 816         [BQ27426]   = BQ27XXX_DATA(bq27426,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 817         [BQ27441]   = BQ27XXX_DATA(bq27441,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 818         [BQ27621]   = BQ27XXX_DATA(bq27621,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 819 };
 820
 821 static DEFINE_MUTEX(bq27xxx_list_lock);
 822 static LIST_HEAD(bq27xxx_battery_devices);
 823
 824 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
 825
 826 #define BQ27XXX_DM_SZ   32
 827
 828 /**
 829  * struct bq27xxx_dm_buf - chip data memory buffer
 830  * @class: data memory subclass_id
 831  * @block: data memory block number
 832  * @data: data from/for the block
 833  * @has_data: true if data has been filled by read
 834  * @dirty: true if data has changed since last read/write
 835  *
 836  * Encapsulates info required to manage chip data memory blocks.
 837  */
 838 struct bq27xxx_dm_buf {
 839         u8 class;
 840         u8 block;
 841         u8 data[BQ27XXX_DM_SZ];
 842         bool has_data, dirty;
 843 };
 844
 845 #define BQ27XXX_DM_BUF(di, i) { \
 846         .class = (di)->dm_regs[i].subclass_id, \
 847         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
 848 }
 849
 850 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
 851                                       struct bq27xxx_dm_reg *reg)
 852 {
 853         if (buf->class == reg->subclass_id &&
 854             buf->block == reg->offset / BQ27XXX_DM_SZ)
 855                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
 856
 857         return NULL;
 858 }
 859
 860 static const char * const bq27xxx_dm_reg_name[] = {
 861         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
 862         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
 863         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
 864 };
 865
 866
 867 static bool bq27xxx_dt_to_nvm = true;
 868 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
 869 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
 870         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
 871         "Users must set this =0 when installing a different type of battery!\n"
 872         "Default is =1."
 873 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
 874         "\nSetting this affects future kernel updates, not the current configuration."
 875 #endif
 876 );
 877
 878 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
 879 {
 880         struct bq27xxx_device_info *di;
 881         unsigned int prev_val = *(unsigned int *) kp->arg;
 882         int ret;
 883
 884         ret = param_set_uint(val, kp);
 885         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
 886                 return ret;
 887
 888         mutex_lock(&bq27xxx_list_lock);
 889         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
 890                 cancel_delayed_work_sync(&di->work);
 891                 schedule_delayed_work(&di->work, 0);
 892         }
 893         mutex_unlock(&bq27xxx_list_lock);
 894
 895         return ret;
 896 }
 897
 898 static const struct kernel_param_ops param_ops_poll_interval = {
 899         .get = param_get_uint,
 900         .set = poll_interval_param_set,
 901 };
 902
 903 static unsigned int poll_interval = 360;
 904 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
 905 MODULE_PARM_DESC(poll_interval,
 906                  "battery poll interval in seconds - 0 disables polling");
 907
 908 /*
 909  * Common code for BQ27xxx devices
 910  */
 911
 912 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
 913                                bool single)
 914 {
 915         int ret;
 916
 917         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 918                 return -EINVAL;
 919
 920         ret = di->bus.read(di, di->regs[reg_index], single);
 921         if (ret < 0)
 922                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
 923                         di->regs[reg_index], reg_index);
 924
 925         return ret;
 926 }
 927
 928 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
 929                                 u16 value, bool single)
 930 {
 931         int ret;
 932
 933         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 934                 return -EINVAL;
 935
 936         if (!di->bus.write)
 937                 return -EPERM;
 938
 939         ret = di->bus.write(di, di->regs[reg_index], value, single);
 940         if (ret < 0)
 941                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
 942                         di->regs[reg_index], reg_index);
 943
 944         return ret;
 945 }
 946
 947 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
 948                                      u8 *data, int len)
 949 {
 950         int ret;
 951
 952         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 953                 return -EINVAL;
 954
 955         if (!di->bus.read_bulk)
 956                 return -EPERM;
 957
 958         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
 959         if (ret < 0)
 960                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
 961                         di->regs[reg_index], reg_index);
 962
 963         return ret;
 964 }
 965
 966 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
 967                                       u8 *data, int len)
 968 {
 969         int ret;
 970
 971         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 972                 return -EINVAL;
 973
 974         if (!di->bus.write_bulk)
 975                 return -EPERM;
 976
 977         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
 978         if (ret < 0)
 979                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
 980                         di->regs[reg_index], reg_index);
 981
 982         return ret;
 983 }
 984
 985 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
 986 {
 987         int ret;
 988
 989         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
 990         if (ret < 0) {
 991                 dev_err(di->dev, "bus error on seal: %d\n", ret);
 992                 return ret;
 993         }
 994
 995         return 0;
 996 }
 997
 998 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
 999 {
1000         int ret;
1001
1002         if (di->unseal_key == 0) {
1003                 dev_err(di->dev, "unseal failed due to missing key\n");
1004                 return -EINVAL;
1005         }
1006
1007         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1008         if (ret < 0)
1009                 goto out;
1010
1011         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1012         if (ret < 0)
1013                 goto out;
1014
1015         return 0;
1016
1017 out:
1018         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1019         return ret;
1020 }
1021
1022 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1023 {
1024         u16 sum = 0;
1025         int i;
1026
1027         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1028                 sum += buf->data[i];
1029         sum &= 0xff;
1030
1031         return 0xff - sum;
1032 }
1033
1034 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1035                                          struct bq27xxx_dm_buf *buf)
1036 {
1037         int ret;
1038
1039         buf->has_data = false;
1040
1041         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1042         if (ret < 0)
1043                 goto out;
1044
1045         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1046         if (ret < 0)
1047                 goto out;
1048
1049         BQ27XXX_MSLEEP(1);
1050
1051         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1052         if (ret < 0)
1053                 goto out;
1054
1055         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1056         if (ret < 0)
1057                 goto out;
1058
1059         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1060                 ret = -EINVAL;
1061                 goto out;
1062         }
1063
1064         buf->has_data = true;
1065         buf->dirty = false;
1066
1067         return 0;
1068
1069 out:
1070         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1071         return ret;
1072 }
1073
1074 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1075                                             struct bq27xxx_dm_buf *buf,
1076                                             enum bq27xxx_dm_reg_id reg_id,
1077                                             unsigned int val)
1078 {
1079         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1080         const char *str = bq27xxx_dm_reg_name[reg_id];
1081         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1082
1083         if (prev == NULL) {
1084                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1085                 return;
1086         }
1087
1088         if (reg->bytes != 2) {
1089                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1090                 return;
1091         }
1092
1093         if (!buf->has_data)
1094                 return;
1095
1096         if (be16_to_cpup(prev) == val) {
1097                 dev_info(di->dev, "%s has %u\n", str, val);
1098                 return;
1099         }
1100
1101 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1102         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1103 #else
1104         if (!(di->opts & BQ27XXX_O_RAM)) {
1105 #endif
1106                 /* devicetree and NVM differ; defer to NVM */
1107                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1108 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1109                          "by dt_monitored_battery_updates_nvm=0"
1110 #else
1111                          "for flash/NVM data memory"
1112 #endif
1113                          "\n", str, be16_to_cpup(prev), val);
1114                 return;
1115         }
1116
1117         dev_info(di->dev, "update %s to %u\n", str, val);
1118
1119         *prev = cpu_to_be16(val);
1120         buf->dirty = true;
1121 }
1122
1123 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1124 {
1125         const int limit = 100;
1126         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1127         int ret, try = limit;
1128
1129         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1130         if (ret < 0)
1131                 return ret;
1132
1133         do {
1134                 BQ27XXX_MSLEEP(25);
1135                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1136                 if (ret < 0)
1137                         return ret;
1138         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1139
1140         if (!try && di->chip != BQ27425) { // 425 has a bug
1141                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1142                 return -EINVAL;
1143         }
1144
1145         if (limit - try > 3)
1146                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1147
1148         return 0;
1149 }
1150
1151 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1152 {
1153         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1154         if (ret < 0 && ret != -EINVAL)
1155                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1156
1157         return ret;
1158 }
1159
1160 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1161 {
1162         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1163         if (ret < 0 && ret != -EINVAL)
1164                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1165
1166         return ret;
1167 }
1168
1169 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1170                                           struct bq27xxx_dm_buf *buf)
1171 {
1172         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1173         int ret;
1174
1175         if (!buf->dirty)
1176                 return 0;
1177
1178         if (cfgup) {
1179                 ret = bq27xxx_battery_set_cfgupdate(di);
1180                 if (ret < 0)
1181                         return ret;
1182         }
1183
1184         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1185         if (ret < 0)
1186                 goto out;
1187
1188         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1189         if (ret < 0)
1190                 goto out;
1191
1192         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1193         if (ret < 0)
1194                 goto out;
1195
1196         BQ27XXX_MSLEEP(1);
1197
1198         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1199         if (ret < 0)
1200                 goto out;
1201
1202         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1203                             bq27xxx_battery_checksum_dm_block(buf), true);
1204         if (ret < 0)
1205                 goto out;
1206
1207         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1208          * corruption on the '425 chip (and perhaps others), which can damage
1209          * the chip.
1210          */
1211
1212         if (cfgup) {
1213                 BQ27XXX_MSLEEP(1);
1214                 ret = bq27xxx_battery_soft_reset(di);
1215                 if (ret < 0)
1216                         return ret;
1217         } else {
1218                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1219         }
1220
1221         buf->dirty = false;
1222
1223         return 0;
1224
1225 out:
1226         if (cfgup)
1227                 bq27xxx_battery_soft_reset(di);
1228
1229         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1230         return ret;
1231 }
1232
1233 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1234                                        struct power_supply_battery_info *info)
1235 {
1236         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1237         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1238         bool updated;
1239
1240         if (bq27xxx_battery_unseal(di) < 0)
1241                 return;
1242
1243         if (info->charge_full_design_uah != -EINVAL &&
1244             info->energy_full_design_uwh != -EINVAL) {
1245                 bq27xxx_battery_read_dm_block(di, &bd);
1246                 /* assume design energy & capacity are in same block */
1247                 bq27xxx_battery_update_dm_block(di, &bd,
1248                                         BQ27XXX_DM_DESIGN_CAPACITY,
1249                                         info->charge_full_design_uah / 1000);
1250                 bq27xxx_battery_update_dm_block(di, &bd,
1251                                         BQ27XXX_DM_DESIGN_ENERGY,
1252                                         info->energy_full_design_uwh / 1000);
1253         }
1254
1255         if (info->voltage_min_design_uv != -EINVAL) {
1256                 bool same = bd.class == bt.class && bd.block == bt.block;
1257                 if (!same)
1258                         bq27xxx_battery_read_dm_block(di, &bt);
1259                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1260                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1261                                         info->voltage_min_design_uv / 1000);
1262         }
1263
1264         updated = bd.dirty || bt.dirty;
1265
1266         bq27xxx_battery_write_dm_block(di, &bd);
1267         bq27xxx_battery_write_dm_block(di, &bt);
1268
1269         bq27xxx_battery_seal(di);
1270
1271         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1272                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1273                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1274         }
1275         /* assume bq27xxx_battery_update() is called hereafter */
1276 }
1277
1278 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1279 {
1280         struct power_supply_battery_info info = {};
1281         unsigned int min, max;
1282
1283         if (power_supply_get_battery_info(di->bat, &info) < 0)
1284                 return;
1285
1286         if (!di->dm_regs) {
1287                 dev_warn(di->dev, "data memory update not supported for chip\n");
1288                 return;
1289         }
1290
1291         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1292                 if (info.energy_full_design_uwh == -EINVAL)
1293                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1294                 else if (info.charge_full_design_uah == -EINVAL)
1295                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1296         }
1297
1298         /* assume min == 0 */
1299         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1300         if (info.energy_full_design_uwh > max * 1000) {
1301                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1302                         info.energy_full_design_uwh);
1303                 info.energy_full_design_uwh = -EINVAL;
1304         }
1305
1306         /* assume min == 0 */
1307         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1308         if (info.charge_full_design_uah > max * 1000) {
1309                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1310                         info.charge_full_design_uah);
1311                 info.charge_full_design_uah = -EINVAL;
1312         }
1313
1314         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1315         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1316         if ((info.voltage_min_design_uv < min * 1000 ||
1317              info.voltage_min_design_uv > max * 1000) &&
1318              info.voltage_min_design_uv != -EINVAL) {
1319                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1320                         info.voltage_min_design_uv);
1321                 info.voltage_min_design_uv = -EINVAL;
1322         }
1323
1324         if ((info.energy_full_design_uwh != -EINVAL &&
1325              info.charge_full_design_uah != -EINVAL) ||
1326              info.voltage_min_design_uv  != -EINVAL)
1327                 bq27xxx_battery_set_config(di, &info);
1328 }
1329
1330 /*
1331  * Return the battery State-of-Charge
1332  * Or < 0 if something fails.
1333  */
1334 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1335 {
1336         int soc;
1337
1338         if (di->opts & BQ27XXX_O_ZERO)
1339                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1340         else
1341                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1342
1343         if (soc < 0)
1344                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1345
1346         return soc;
1347 }
1348
1349 /*
1350  * Return a battery charge value in µAh
1351  * Or < 0 if something fails.
1352  */
1353 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1354 {
1355         int charge;
1356
1357         charge = bq27xxx_read(di, reg, false);
1358         if (charge < 0) {
1359                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1360                         reg, charge);
1361                 return charge;
1362         }
1363
1364         if (di->opts & BQ27XXX_O_ZERO)
1365                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1366         else
1367                 charge *= 1000;
1368
1369         return charge;
1370 }
1371
1372 /*
1373  * Return the battery Nominal available capacity in µAh
1374  * Or < 0 if something fails.
1375  */
1376 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1377 {
1378         int flags;
1379
1380         if (di->opts & BQ27XXX_O_ZERO) {
1381                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1382                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1383                         return -ENODATA;
1384         }
1385
1386         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1387 }
1388
1389 /*
1390  * Return the battery Full Charge Capacity in µAh
1391  * Or < 0 if something fails.
1392  */
1393 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1394 {
1395         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1396 }
1397
1398 /*
1399  * Return the Design Capacity in µAh
1400  * Or < 0 if something fails.
1401  */
1402 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1403 {
1404         int dcap;
1405
1406         if (di->opts & BQ27XXX_O_ZERO)
1407                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1408         else
1409                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1410
1411         if (dcap < 0) {
1412                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1413                 return dcap;
1414         }
1415
1416         if (di->opts & BQ27XXX_O_ZERO)
1417                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1418         else
1419                 dcap *= 1000;
1420
1421         return dcap;
1422 }
1423
1424 /*
1425  * Return the battery Available energy in µWh
1426  * Or < 0 if something fails.
1427  */
1428 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1429 {
1430         int ae;
1431
1432         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1433         if (ae < 0) {
1434                 dev_dbg(di->dev, "error reading available energy\n");
1435                 return ae;
1436         }
1437
1438         if (di->opts & BQ27XXX_O_ZERO)
1439                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1440         else
1441                 ae *= 1000;
1442
1443         return ae;
1444 }
1445
1446 /*
1447  * Return the battery temperature in tenths of degree Kelvin
1448  * Or < 0 if something fails.
1449  */
1450 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1451 {
1452         int temp;
1453
1454         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1455         if (temp < 0) {
1456                 dev_err(di->dev, "error reading temperature\n");
1457                 return temp;
1458         }
1459
1460         if (di->opts & BQ27XXX_O_ZERO)
1461                 temp = 5 * temp / 2;
1462
1463         return temp;
1464 }
1465
1466 /*
1467  * Return the battery Cycle count total
1468  * Or < 0 if something fails.
1469  */
1470 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1471 {
1472         int cyct;
1473
1474         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1475         if (cyct < 0)
1476                 dev_err(di->dev, "error reading cycle count total\n");
1477
1478         return cyct;
1479 }
1480
1481 /*
1482  * Read a time register.
1483  * Return < 0 if something fails.
1484  */
1485 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1486 {
1487         int tval;
1488
1489         tval = bq27xxx_read(di, reg, false);
1490         if (tval < 0) {
1491                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1492                         reg, tval);
1493                 return tval;
1494         }
1495
1496         if (tval == 65535)
1497                 return -ENODATA;
1498
1499         return tval * 60;
1500 }
1501
1502 /*
1503  * Read an average power register.
1504  * Return < 0 if something fails.
1505  */
1506 static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
1507 {
1508         int tval;
1509
1510         tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1511         if (tval < 0) {
1512                 dev_err(di->dev, "error reading average power register  %02x: %d\n",
1513                         BQ27XXX_REG_AP, tval);
1514                 return tval;
1515         }
1516
1517         if (di->opts & BQ27XXX_O_ZERO)
1518                 return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1519         else
1520                 return tval;
1521 }
1522
1523 /*
1524  * Returns true if a battery over temperature condition is detected
1525  */
1526 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1527 {
1528         if (di->opts & BQ27XXX_O_OTDC)
1529                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1530         if (di->opts & BQ27XXX_O_UTOT)
1531                 return flags & BQ27XXX_FLAG_OT;
1532
1533         return false;
1534 }
1535
1536 /*
1537  * Returns true if a battery under temperature condition is detected
1538  */
1539 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1540 {
1541         if (di->opts & BQ27XXX_O_UTOT)
1542                 return flags & BQ27XXX_FLAG_UT;
1543
1544         return false;
1545 }
1546
1547 /*
1548  * Returns true if a low state of charge condition is detected
1549  */
1550 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1551 {
1552         if (di->opts & BQ27XXX_O_ZERO)
1553                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1554         else
1555                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1556 }
1557
1558 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1559 {
1560         /* Unlikely but important to return first */
1561         if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
1562                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1563         if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
1564                 return POWER_SUPPLY_HEALTH_COLD;
1565         if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
1566                 return POWER_SUPPLY_HEALTH_DEAD;
1567
1568         return POWER_SUPPLY_HEALTH_GOOD;
1569 }
1570
1571 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1572 {
1573         struct bq27xxx_reg_cache cache = {0, };
1574         bool has_ci_flag = di->opts & BQ27XXX_O_ZERO;
1575         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1576
1577         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1578         if ((cache.flags & 0xff) == 0xff)
1579                 cache.flags = -1; /* read error */
1580         if (cache.flags >= 0) {
1581                 cache.temperature = bq27xxx_battery_read_temperature(di);
1582                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1583                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1584                         cache.capacity = -ENODATA;
1585                         cache.energy = -ENODATA;
1586                         cache.time_to_empty = -ENODATA;
1587                         cache.time_to_empty_avg = -ENODATA;
1588                         cache.time_to_full = -ENODATA;
1589                         cache.charge_full = -ENODATA;
1590                         cache.health = -ENODATA;
1591                 } else {
1592                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1593                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1594                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1595                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1596                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1597                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1598                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1599                         cache.capacity = bq27xxx_battery_read_soc(di);
1600                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1601                                 cache.energy = bq27xxx_battery_read_energy(di);
1602                         di->cache.flags = cache.flags;
1603                         cache.health = bq27xxx_battery_read_health(di);
1604                 }
1605                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1606                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1607                 if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
1608                         cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
1609
1610                 /* We only have to read charge design full once */
1611                 if (di->charge_design_full <= 0)
1612                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1613         }
1614
1615         if ((di->cache.capacity != cache.capacity) ||
1616             (di->cache.flags != cache.flags))
1617                 power_supply_changed(di->bat);
1618
1619         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1620                 di->cache = cache;
1621
1622         di->last_update = jiffies;
1623 }
1624 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1625
1626 static void bq27xxx_battery_poll(struct work_struct *work)
1627 {
1628         struct bq27xxx_device_info *di =
1629                         container_of(work, struct bq27xxx_device_info,
1630                                      work.work);
1631
1632         bq27xxx_battery_update(di);
1633
1634         if (poll_interval > 0)
1635                 schedule_delayed_work(&di->work, poll_interval * HZ);
1636 }
1637
1638 /*
1639  * Return the battery average current in µA
1640  * Note that current can be negative signed as well
1641  * Or 0 if something fails.
1642  */
1643 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1644                                    union power_supply_propval *val)
1645 {
1646         int curr;
1647         int flags;
1648
1649         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1650         if (curr < 0) {
1651                 dev_err(di->dev, "error reading current\n");
1652                 return curr;
1653         }
1654
1655         if (di->opts & BQ27XXX_O_ZERO) {
1656                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1657                 if (flags & BQ27000_FLAG_CHGS) {
1658                         dev_dbg(di->dev, "negative current!\n");
1659                         curr = -curr;
1660                 }
1661
1662                 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1663         } else {
1664                 /* Other gauges return signed value */
1665                 val->intval = (int)((s16)curr) * 1000;
1666         }
1667
1668         return 0;
1669 }
1670
1671 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1672                                   union power_supply_propval *val)
1673 {
1674         int status;
1675
1676         if (di->opts & BQ27XXX_O_ZERO) {
1677                 if (di->cache.flags & BQ27000_FLAG_FC)
1678                         status = POWER_SUPPLY_STATUS_FULL;
1679                 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1680                         status = POWER_SUPPLY_STATUS_CHARGING;
1681                 else if (power_supply_am_i_supplied(di->bat) > 0)
1682                         status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1683                 else
1684                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1685         } else {
1686                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1687                         status = POWER_SUPPLY_STATUS_FULL;
1688                 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1689                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1690                 else
1691                         status = POWER_SUPPLY_STATUS_CHARGING;
1692         }
1693
1694         val->intval = status;
1695
1696         return 0;
1697 }
1698
1699 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1700                                           union power_supply_propval *val)
1701 {
1702         int level;
1703
1704         if (di->opts & BQ27XXX_O_ZERO) {
1705                 if (di->cache.flags & BQ27000_FLAG_FC)
1706                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1707                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1708                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1709                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1710                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1711                 else
1712                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1713         } else {
1714                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1715                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1716                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1717                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1718                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1719                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1720                 else
1721                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1722         }
1723
1724         val->intval = level;
1725
1726         return 0;
1727 }
1728
1729 /*
1730  * Return the battery Voltage in millivolts
1731  * Or < 0 if something fails.
1732  */
1733 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1734                                    union power_supply_propval *val)
1735 {
1736         int volt;
1737
1738         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1739         if (volt < 0) {
1740                 dev_err(di->dev, "error reading voltage\n");
1741                 return volt;
1742         }
1743
1744         val->intval = volt * 1000;
1745
1746         return 0;
1747 }
1748
1749 static int bq27xxx_simple_value(int value,
1750                                 union power_supply_propval *val)
1751 {
1752         if (value < 0)
1753                 return value;
1754
1755         val->intval = value;
1756
1757         return 0;
1758 }
1759
1760 static int bq27xxx_battery_get_property(struct power_supply *psy,
1761                                         enum power_supply_property psp,
1762                                         union power_supply_propval *val)
1763 {
1764         int ret = 0;
1765         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1766
1767         mutex_lock(&di->lock);
1768         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1769                 cancel_delayed_work_sync(&di->work);
1770                 bq27xxx_battery_poll(&di->work.work);
1771         }
1772         mutex_unlock(&di->lock);
1773
1774         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1775                 return -ENODEV;
1776
1777         switch (psp) {
1778         case POWER_SUPPLY_PROP_STATUS:
1779                 ret = bq27xxx_battery_status(di, val);
1780                 break;
1781         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1782                 ret = bq27xxx_battery_voltage(di, val);
1783                 break;
1784         case POWER_SUPPLY_PROP_PRESENT:
1785                 val->intval = di->cache.flags < 0 ? 0 : 1;
1786                 break;
1787         case POWER_SUPPLY_PROP_CURRENT_NOW:
1788                 ret = bq27xxx_battery_current(di, val);
1789                 break;
1790         case POWER_SUPPLY_PROP_CAPACITY:
1791                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1792                 break;
1793         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1794                 ret = bq27xxx_battery_capacity_level(di, val);
1795                 break;
1796         case POWER_SUPPLY_PROP_TEMP:
1797                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1798                 if (ret == 0)
1799                         val->intval -= 2731; /* convert decidegree k to c */
1800                 break;
1801         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1802                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1803                 break;
1804         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1805                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1806                 break;
1807         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1808                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1809                 break;
1810         case POWER_SUPPLY_PROP_TECHNOLOGY:
1811                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1812                 break;
1813         case POWER_SUPPLY_PROP_CHARGE_NOW:
1814                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1815                 break;
1816         case POWER_SUPPLY_PROP_CHARGE_FULL:
1817                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1818                 break;
1819         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1820                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1821                 break;
1822         /*
1823          * TODO: Implement these to make registers set from
1824          * power_supply_battery_info visible in sysfs.
1825          */
1826         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1827         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1828                 return -EINVAL;
1829         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1830                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1831                 break;
1832         case POWER_SUPPLY_PROP_ENERGY_NOW:
1833                 ret = bq27xxx_simple_value(di->cache.energy, val);
1834                 break;
1835         case POWER_SUPPLY_PROP_POWER_AVG:
1836                 ret = bq27xxx_simple_value(di->cache.power_avg, val);
1837                 break;
1838         case POWER_SUPPLY_PROP_HEALTH:
1839                 ret = bq27xxx_simple_value(di->cache.health, val);
1840                 break;
1841         case POWER_SUPPLY_PROP_MANUFACTURER:
1842                 val->strval = BQ27XXX_MANUFACTURER;
1843                 break;
1844         default:
1845                 return -EINVAL;
1846         }
1847
1848         return ret;
1849 }
1850
1851 static void bq27xxx_external_power_changed(struct power_supply *psy)
1852 {
1853         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1854
1855         cancel_delayed_work_sync(&di->work);
1856         schedule_delayed_work(&di->work, 0);
1857 }
1858
1859 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1860 {
1861         struct power_supply_desc *psy_desc;
1862         struct power_supply_config psy_cfg = {
1863                 .of_node = di->dev->of_node,
1864                 .drv_data = di,
1865         };
1866
1867         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1868         mutex_init(&di->lock);
1869
1870         di->regs       = bq27xxx_chip_data[di->chip].regs;
1871         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
1872         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
1873         di->opts       = bq27xxx_chip_data[di->chip].opts;
1874
1875         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1876         if (!psy_desc)
1877                 return -ENOMEM;
1878
1879         psy_desc->name = di->name;
1880         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1881         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
1882         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
1883         psy_desc->get_property = bq27xxx_battery_get_property;
1884         psy_desc->external_power_changed = bq27xxx_external_power_changed;
1885
1886         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1887         if (IS_ERR(di->bat)) {
1888                 dev_err(di->dev, "failed to register battery\n");
1889                 return PTR_ERR(di->bat);
1890         }
1891
1892         bq27xxx_battery_settings(di);
1893         bq27xxx_battery_update(di);
1894
1895         mutex_lock(&bq27xxx_list_lock);
1896         list_add(&di->list, &bq27xxx_battery_devices);
1897         mutex_unlock(&bq27xxx_list_lock);
1898
1899         return 0;
1900 }
1901 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1902
1903 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1904 {
1905         /*
1906          * power_supply_unregister call bq27xxx_battery_get_property which
1907          * call bq27xxx_battery_poll.
1908          * Make sure that bq27xxx_battery_poll will not call
1909          * schedule_delayed_work again after unregister (which cause OOPS).
1910          */
1911         poll_interval = 0;
1912
1913         cancel_delayed_work_sync(&di->work);
1914
1915         power_supply_unregister(di->bat);
1916
1917         mutex_lock(&bq27xxx_list_lock);
1918         list_del(&di->list);
1919         mutex_unlock(&bq27xxx_list_lock);
1920
1921         mutex_destroy(&di->lock);
1922 }
1923 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1924
1925 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1926 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
1927 MODULE_LICENSE("GPL");