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 bq27425_regs bq27421_regs
 436 #define bq27426_regs bq27421_regs
 437 #define bq27441_regs bq27421_regs
 438 #define bq27621_regs bq27421_regs
 439
 440 static enum power_supply_property bq27000_props[] = {
 441         POWER_SUPPLY_PROP_STATUS,
 442         POWER_SUPPLY_PROP_PRESENT,
 443         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 444         POWER_SUPPLY_PROP_CURRENT_NOW,
 445         POWER_SUPPLY_PROP_CAPACITY,
 446         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 447         POWER_SUPPLY_PROP_TEMP,
 448         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 449         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 450         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 451         POWER_SUPPLY_PROP_TECHNOLOGY,
 452         POWER_SUPPLY_PROP_CHARGE_FULL,
 453         POWER_SUPPLY_PROP_CHARGE_NOW,
 454         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 455         POWER_SUPPLY_PROP_CYCLE_COUNT,
 456         POWER_SUPPLY_PROP_ENERGY_NOW,
 457         POWER_SUPPLY_PROP_POWER_AVG,
 458         POWER_SUPPLY_PROP_HEALTH,
 459         POWER_SUPPLY_PROP_MANUFACTURER,
 460 };
 461
 462 static enum power_supply_property bq27010_props[] = {
 463         POWER_SUPPLY_PROP_STATUS,
 464         POWER_SUPPLY_PROP_PRESENT,
 465         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 466         POWER_SUPPLY_PROP_CURRENT_NOW,
 467         POWER_SUPPLY_PROP_CAPACITY,
 468         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 469         POWER_SUPPLY_PROP_TEMP,
 470         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 471         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 472         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 473         POWER_SUPPLY_PROP_TECHNOLOGY,
 474         POWER_SUPPLY_PROP_CHARGE_FULL,
 475         POWER_SUPPLY_PROP_CHARGE_NOW,
 476         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 477         POWER_SUPPLY_PROP_CYCLE_COUNT,
 478         POWER_SUPPLY_PROP_HEALTH,
 479         POWER_SUPPLY_PROP_MANUFACTURER,
 480 };
 481
 482 #define bq2750x_props bq27510g3_props
 483 #define bq2751x_props bq27510g3_props
 484 #define bq2752x_props bq27510g3_props
 485
 486 static enum power_supply_property bq27500_props[] = {
 487         POWER_SUPPLY_PROP_STATUS,
 488         POWER_SUPPLY_PROP_PRESENT,
 489         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 490         POWER_SUPPLY_PROP_CURRENT_NOW,
 491         POWER_SUPPLY_PROP_CAPACITY,
 492         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 493         POWER_SUPPLY_PROP_TEMP,
 494         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 495         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 496         POWER_SUPPLY_PROP_TECHNOLOGY,
 497         POWER_SUPPLY_PROP_CHARGE_FULL,
 498         POWER_SUPPLY_PROP_CHARGE_NOW,
 499         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 500         POWER_SUPPLY_PROP_CYCLE_COUNT,
 501         POWER_SUPPLY_PROP_ENERGY_NOW,
 502         POWER_SUPPLY_PROP_POWER_AVG,
 503         POWER_SUPPLY_PROP_HEALTH,
 504         POWER_SUPPLY_PROP_MANUFACTURER,
 505 };
 506 #define bq27510g1_props bq27500_props
 507 #define bq27510g2_props bq27500_props
 508
 509 static enum power_supply_property bq27510g3_props[] = {
 510         POWER_SUPPLY_PROP_STATUS,
 511         POWER_SUPPLY_PROP_PRESENT,
 512         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 513         POWER_SUPPLY_PROP_CURRENT_NOW,
 514         POWER_SUPPLY_PROP_CAPACITY,
 515         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 516         POWER_SUPPLY_PROP_TEMP,
 517         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 518         POWER_SUPPLY_PROP_TECHNOLOGY,
 519         POWER_SUPPLY_PROP_CHARGE_FULL,
 520         POWER_SUPPLY_PROP_CHARGE_NOW,
 521         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 522         POWER_SUPPLY_PROP_CYCLE_COUNT,
 523         POWER_SUPPLY_PROP_HEALTH,
 524         POWER_SUPPLY_PROP_MANUFACTURER,
 525 };
 526
 527 static enum power_supply_property bq27520g1_props[] = {
 528         POWER_SUPPLY_PROP_STATUS,
 529         POWER_SUPPLY_PROP_PRESENT,
 530         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 531         POWER_SUPPLY_PROP_CURRENT_NOW,
 532         POWER_SUPPLY_PROP_CAPACITY,
 533         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 534         POWER_SUPPLY_PROP_TEMP,
 535         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 536         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 537         POWER_SUPPLY_PROP_TECHNOLOGY,
 538         POWER_SUPPLY_PROP_CHARGE_FULL,
 539         POWER_SUPPLY_PROP_CHARGE_NOW,
 540         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 541         POWER_SUPPLY_PROP_ENERGY_NOW,
 542         POWER_SUPPLY_PROP_POWER_AVG,
 543         POWER_SUPPLY_PROP_HEALTH,
 544         POWER_SUPPLY_PROP_MANUFACTURER,
 545 };
 546
 547 #define bq27520g2_props bq27500_props
 548
 549 static enum power_supply_property bq27520g3_props[] = {
 550         POWER_SUPPLY_PROP_STATUS,
 551         POWER_SUPPLY_PROP_PRESENT,
 552         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 553         POWER_SUPPLY_PROP_CURRENT_NOW,
 554         POWER_SUPPLY_PROP_CAPACITY,
 555         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 556         POWER_SUPPLY_PROP_TEMP,
 557         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 558         POWER_SUPPLY_PROP_TECHNOLOGY,
 559         POWER_SUPPLY_PROP_CHARGE_FULL,
 560         POWER_SUPPLY_PROP_CHARGE_NOW,
 561         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 562         POWER_SUPPLY_PROP_CYCLE_COUNT,
 563         POWER_SUPPLY_PROP_ENERGY_NOW,
 564         POWER_SUPPLY_PROP_POWER_AVG,
 565         POWER_SUPPLY_PROP_HEALTH,
 566         POWER_SUPPLY_PROP_MANUFACTURER,
 567 };
 568
 569 static enum power_supply_property bq27520g4_props[] = {
 570         POWER_SUPPLY_PROP_STATUS,
 571         POWER_SUPPLY_PROP_PRESENT,
 572         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 573         POWER_SUPPLY_PROP_CURRENT_NOW,
 574         POWER_SUPPLY_PROP_CAPACITY,
 575         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 576         POWER_SUPPLY_PROP_TEMP,
 577         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 578         POWER_SUPPLY_PROP_TECHNOLOGY,
 579         POWER_SUPPLY_PROP_CHARGE_FULL,
 580         POWER_SUPPLY_PROP_CHARGE_NOW,
 581         POWER_SUPPLY_PROP_CYCLE_COUNT,
 582         POWER_SUPPLY_PROP_HEALTH,
 583         POWER_SUPPLY_PROP_MANUFACTURER,
 584 };
 585
 586 static enum power_supply_property bq27521_props[] = {
 587         POWER_SUPPLY_PROP_STATUS,
 588         POWER_SUPPLY_PROP_PRESENT,
 589         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 590         POWER_SUPPLY_PROP_CURRENT_NOW,
 591         POWER_SUPPLY_PROP_TEMP,
 592         POWER_SUPPLY_PROP_TECHNOLOGY,
 593 };
 594
 595 static enum power_supply_property bq27530_props[] = {
 596         POWER_SUPPLY_PROP_STATUS,
 597         POWER_SUPPLY_PROP_PRESENT,
 598         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 599         POWER_SUPPLY_PROP_CURRENT_NOW,
 600         POWER_SUPPLY_PROP_CAPACITY,
 601         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 602         POWER_SUPPLY_PROP_TEMP,
 603         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 604         POWER_SUPPLY_PROP_TECHNOLOGY,
 605         POWER_SUPPLY_PROP_CHARGE_FULL,
 606         POWER_SUPPLY_PROP_CHARGE_NOW,
 607         POWER_SUPPLY_PROP_POWER_AVG,
 608         POWER_SUPPLY_PROP_HEALTH,
 609         POWER_SUPPLY_PROP_CYCLE_COUNT,
 610         POWER_SUPPLY_PROP_MANUFACTURER,
 611 };
 612 #define bq27531_props bq27530_props
 613
 614 static enum power_supply_property bq27541_props[] = {
 615         POWER_SUPPLY_PROP_STATUS,
 616         POWER_SUPPLY_PROP_PRESENT,
 617         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 618         POWER_SUPPLY_PROP_CURRENT_NOW,
 619         POWER_SUPPLY_PROP_CAPACITY,
 620         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 621         POWER_SUPPLY_PROP_TEMP,
 622         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 623         POWER_SUPPLY_PROP_TECHNOLOGY,
 624         POWER_SUPPLY_PROP_CHARGE_FULL,
 625         POWER_SUPPLY_PROP_CHARGE_NOW,
 626         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 627         POWER_SUPPLY_PROP_CYCLE_COUNT,
 628         POWER_SUPPLY_PROP_POWER_AVG,
 629         POWER_SUPPLY_PROP_HEALTH,
 630         POWER_SUPPLY_PROP_MANUFACTURER,
 631 };
 632 #define bq27542_props bq27541_props
 633 #define bq27546_props bq27541_props
 634 #define bq27742_props bq27541_props
 635
 636 static enum power_supply_property bq27545_props[] = {
 637         POWER_SUPPLY_PROP_STATUS,
 638         POWER_SUPPLY_PROP_PRESENT,
 639         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 640         POWER_SUPPLY_PROP_CURRENT_NOW,
 641         POWER_SUPPLY_PROP_CAPACITY,
 642         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 643         POWER_SUPPLY_PROP_TEMP,
 644         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 645         POWER_SUPPLY_PROP_TECHNOLOGY,
 646         POWER_SUPPLY_PROP_CHARGE_FULL,
 647         POWER_SUPPLY_PROP_CHARGE_NOW,
 648         POWER_SUPPLY_PROP_HEALTH,
 649         POWER_SUPPLY_PROP_CYCLE_COUNT,
 650         POWER_SUPPLY_PROP_POWER_AVG,
 651         POWER_SUPPLY_PROP_MANUFACTURER,
 652 };
 653
 654 static enum power_supply_property bq27421_props[] = {
 655         POWER_SUPPLY_PROP_STATUS,
 656         POWER_SUPPLY_PROP_PRESENT,
 657         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 658         POWER_SUPPLY_PROP_CURRENT_NOW,
 659         POWER_SUPPLY_PROP_CAPACITY,
 660         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 661         POWER_SUPPLY_PROP_TEMP,
 662         POWER_SUPPLY_PROP_TECHNOLOGY,
 663         POWER_SUPPLY_PROP_CHARGE_FULL,
 664         POWER_SUPPLY_PROP_CHARGE_NOW,
 665         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 666         POWER_SUPPLY_PROP_MANUFACTURER,
 667 };
 668 #define bq27425_props bq27421_props
 669 #define bq27426_props bq27421_props
 670 #define bq27441_props bq27421_props
 671 #define bq27621_props bq27421_props
 672
 673 struct bq27xxx_dm_reg {
 674         u8 subclass_id;
 675         u8 offset;
 676         u8 bytes;
 677         u16 min, max;
 678 };
 679
 680 enum bq27xxx_dm_reg_id {
 681         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 682         BQ27XXX_DM_DESIGN_ENERGY,
 683         BQ27XXX_DM_TERMINATE_VOLTAGE,
 684 };
 685
 686 #define bq27000_dm_regs 0
 687 #define bq27010_dm_regs 0
 688 #define bq2750x_dm_regs 0
 689 #define bq2751x_dm_regs 0
 690 #define bq2752x_dm_regs 0
 691
 692 #if 0 /* not yet tested */
 693 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 694         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 10, 2,    0, 65535 },
 695         [BQ27XXX_DM_DESIGN_ENERGY]     = { }, /* missing on chip */
 696         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
 697 };
 698 #else
 699 #define bq27500_dm_regs 0
 700 #endif
 701
 702 /* todo create data memory definitions from datasheets and test on chips */
 703 #define bq27510g1_dm_regs 0
 704 #define bq27510g2_dm_regs 0
 705 #define bq27510g3_dm_regs 0
 706 #define bq27520g1_dm_regs 0
 707 #define bq27520g2_dm_regs 0
 708 #define bq27520g3_dm_regs 0
 709 #define bq27520g4_dm_regs 0
 710 #define bq27521_dm_regs 0
 711 #define bq27530_dm_regs 0
 712 #define bq27531_dm_regs 0
 713 #define bq27541_dm_regs 0
 714 #define bq27542_dm_regs 0
 715 #define bq27546_dm_regs 0
 716 #define bq27742_dm_regs 0
 717
 718 #if 0 /* not yet tested */
 719 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
 720         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 23, 2,    0, 32767 },
 721         [BQ27XXX_DM_DESIGN_ENERGY]     = { 48, 25, 2,    0, 32767 },
 722         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800,  3700 },
 723 };
 724 #else
 725 #define bq27545_dm_regs 0
 726 #endif
 727
 728 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
 729         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0,  8000 },
 730         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 731         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500,  3700 },
 732 };
 733
 734 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
 735         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 12, 2,    0, 32767 },
 736         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 14, 2,    0, 32767 },
 737         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800,  3700 },
 738 };
 739
 740 static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
 741         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82,  6, 2,    0,  8000 },
 742         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82,  8, 2,    0, 32767 },
 743         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 10, 2, 2500,  3700 },
 744 };
 745
 746 #if 0 /* not yet tested */
 747 #define bq27441_dm_regs bq27421_dm_regs
 748 #else
 749 #define bq27441_dm_regs 0
 750 #endif
 751
 752 #if 0 /* not yet tested */
 753 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 754         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 3, 2,    0,  8000 },
 755         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 5, 2,    0, 32767 },
 756         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500,  3700 },
 757 };
 758 #else
 759 #define bq27621_dm_regs 0
 760 #endif
 761
 762 #define BQ27XXX_O_ZERO  0x00000001
 763 #define BQ27XXX_O_OTDC  0x00000002 /* has OTC/OTD overtemperature flags */
 764 #define BQ27XXX_O_UTOT  0x00000004 /* has OT overtemperature flag */
 765 #define BQ27XXX_O_CFGUP 0x00000008
 766 #define BQ27XXX_O_RAM   0x00000010
 767
 768 #define BQ27XXX_DATA(ref, key, opt) {           \
 769         .opts = (opt),                          \
 770         .unseal_key = key,                      \
 771         .regs  = ref##_regs,                    \
 772         .dm_regs = ref##_dm_regs,               \
 773         .props = ref##_props,                   \
 774         .props_size = ARRAY_SIZE(ref##_props) }
 775
 776 static struct {
 777         u32 opts;
 778         u32 unseal_key;
 779         u8 *regs;
 780         struct bq27xxx_dm_reg *dm_regs;
 781         enum power_supply_property *props;
 782         size_t props_size;
 783 } bq27xxx_chip_data[] = {
 784         [BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO),
 785         [BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO),
 786         [BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 787         [BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 788         [BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
 789         [BQ27500]   = BQ27XXX_DATA(bq27500,   0x04143672, BQ27XXX_O_OTDC),
 790         [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0         , BQ27XXX_O_OTDC),
 791         [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0         , BQ27XXX_O_OTDC),
 792         [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0         , BQ27XXX_O_OTDC),
 793         [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0         , BQ27XXX_O_OTDC),
 794         [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 795         [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 796         [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
 797         [BQ27521]   = BQ27XXX_DATA(bq27521,   0         , 0),
 798         [BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 799         [BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
 800         [BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
 801         [BQ27542]   = BQ27XXX_DATA(bq27542,   0         , BQ27XXX_O_OTDC),
 802         [BQ27546]   = BQ27XXX_DATA(bq27546,   0         , BQ27XXX_O_OTDC),
 803         [BQ27742]   = BQ27XXX_DATA(bq27742,   0         , BQ27XXX_O_OTDC),
 804         [BQ27545]   = BQ27XXX_DATA(bq27545,   0x04143672, BQ27XXX_O_OTDC),
 805         [BQ27421]   = BQ27XXX_DATA(bq27421,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 806         [BQ27425]   = BQ27XXX_DATA(bq27425,   0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
 807         [BQ27426]   = BQ27XXX_DATA(bq27426,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 808         [BQ27441]   = BQ27XXX_DATA(bq27441,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 809         [BQ27621]   = BQ27XXX_DATA(bq27621,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 810 };
 811
 812 static DEFINE_MUTEX(bq27xxx_list_lock);
 813 static LIST_HEAD(bq27xxx_battery_devices);
 814
 815 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
 816
 817 #define BQ27XXX_DM_SZ   32
 818
 819 /**
 820  * struct bq27xxx_dm_buf - chip data memory buffer
 821  * @class: data memory subclass_id
 822  * @block: data memory block number
 823  * @data: data from/for the block
 824  * @has_data: true if data has been filled by read
 825  * @dirty: true if data has changed since last read/write
 826  *
 827  * Encapsulates info required to manage chip data memory blocks.
 828  */
 829 struct bq27xxx_dm_buf {
 830         u8 class;
 831         u8 block;
 832         u8 data[BQ27XXX_DM_SZ];
 833         bool has_data, dirty;
 834 };
 835
 836 #define BQ27XXX_DM_BUF(di, i) { \
 837         .class = (di)->dm_regs[i].subclass_id, \
 838         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
 839 }
 840
 841 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
 842                                       struct bq27xxx_dm_reg *reg)
 843 {
 844         if (buf->class == reg->subclass_id &&
 845             buf->block == reg->offset / BQ27XXX_DM_SZ)
 846                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
 847
 848         return NULL;
 849 }
 850
 851 static const char * const bq27xxx_dm_reg_name[] = {
 852         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
 853         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
 854         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
 855 };
 856
 857
 858 static bool bq27xxx_dt_to_nvm = true;
 859 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
 860 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
 861         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
 862         "Users must set this =0 when installing a different type of battery!\n"
 863         "Default is =1."
 864 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
 865         "\nSetting this affects future kernel updates, not the current configuration."
 866 #endif
 867 );
 868
 869 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
 870 {
 871         struct bq27xxx_device_info *di;
 872         unsigned int prev_val = *(unsigned int *) kp->arg;
 873         int ret;
 874
 875         ret = param_set_uint(val, kp);
 876         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
 877                 return ret;
 878
 879         mutex_lock(&bq27xxx_list_lock);
 880         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
 881                 cancel_delayed_work_sync(&di->work);
 882                 schedule_delayed_work(&di->work, 0);
 883         }
 884         mutex_unlock(&bq27xxx_list_lock);
 885
 886         return ret;
 887 }
 888
 889 static const struct kernel_param_ops param_ops_poll_interval = {
 890         .get = param_get_uint,
 891         .set = poll_interval_param_set,
 892 };
 893
 894 static unsigned int poll_interval = 360;
 895 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
 896 MODULE_PARM_DESC(poll_interval,
 897                  "battery poll interval in seconds - 0 disables polling");
 898
 899 /*
 900  * Common code for BQ27xxx devices
 901  */
 902
 903 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
 904                                bool single)
 905 {
 906         int ret;
 907
 908         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 909                 return -EINVAL;
 910
 911         ret = di->bus.read(di, di->regs[reg_index], single);
 912         if (ret < 0)
 913                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
 914                         di->regs[reg_index], reg_index);
 915
 916         return ret;
 917 }
 918
 919 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
 920                                 u16 value, bool single)
 921 {
 922         int ret;
 923
 924         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 925                 return -EINVAL;
 926
 927         if (!di->bus.write)
 928                 return -EPERM;
 929
 930         ret = di->bus.write(di, di->regs[reg_index], value, single);
 931         if (ret < 0)
 932                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
 933                         di->regs[reg_index], reg_index);
 934
 935         return ret;
 936 }
 937
 938 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
 939                                      u8 *data, int len)
 940 {
 941         int ret;
 942
 943         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 944                 return -EINVAL;
 945
 946         if (!di->bus.read_bulk)
 947                 return -EPERM;
 948
 949         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
 950         if (ret < 0)
 951                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
 952                         di->regs[reg_index], reg_index);
 953
 954         return ret;
 955 }
 956
 957 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
 958                                       u8 *data, int len)
 959 {
 960         int ret;
 961
 962         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
 963                 return -EINVAL;
 964
 965         if (!di->bus.write_bulk)
 966                 return -EPERM;
 967
 968         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
 969         if (ret < 0)
 970                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
 971                         di->regs[reg_index], reg_index);
 972
 973         return ret;
 974 }
 975
 976 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
 977 {
 978         int ret;
 979
 980         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
 981         if (ret < 0) {
 982                 dev_err(di->dev, "bus error on seal: %d\n", ret);
 983                 return ret;
 984         }
 985
 986         return 0;
 987 }
 988
 989 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
 990 {
 991         int ret;
 992
 993         if (di->unseal_key == 0) {
 994                 dev_err(di->dev, "unseal failed due to missing key\n");
 995                 return -EINVAL;
 996         }
 997
 998         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
 999         if (ret < 0)
1000                 goto out;
1001
1002         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1003         if (ret < 0)
1004                 goto out;
1005
1006         return 0;
1007
1008 out:
1009         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1010         return ret;
1011 }
1012
1013 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1014 {
1015         u16 sum = 0;
1016         int i;
1017
1018         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1019                 sum += buf->data[i];
1020         sum &= 0xff;
1021
1022         return 0xff - sum;
1023 }
1024
1025 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1026                                          struct bq27xxx_dm_buf *buf)
1027 {
1028         int ret;
1029
1030         buf->has_data = false;
1031
1032         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1033         if (ret < 0)
1034                 goto out;
1035
1036         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1037         if (ret < 0)
1038                 goto out;
1039
1040         BQ27XXX_MSLEEP(1);
1041
1042         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1043         if (ret < 0)
1044                 goto out;
1045
1046         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1047         if (ret < 0)
1048                 goto out;
1049
1050         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1051                 ret = -EINVAL;
1052                 goto out;
1053         }
1054
1055         buf->has_data = true;
1056         buf->dirty = false;
1057
1058         return 0;
1059
1060 out:
1061         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1062         return ret;
1063 }
1064
1065 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1066                                             struct bq27xxx_dm_buf *buf,
1067                                             enum bq27xxx_dm_reg_id reg_id,
1068                                             unsigned int val)
1069 {
1070         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1071         const char *str = bq27xxx_dm_reg_name[reg_id];
1072         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1073
1074         if (prev == NULL) {
1075                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1076                 return;
1077         }
1078
1079         if (reg->bytes != 2) {
1080                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1081                 return;
1082         }
1083
1084         if (!buf->has_data)
1085                 return;
1086
1087         if (be16_to_cpup(prev) == val) {
1088                 dev_info(di->dev, "%s has %u\n", str, val);
1089                 return;
1090         }
1091
1092 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1093         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1094 #else
1095         if (!(di->opts & BQ27XXX_O_RAM)) {
1096 #endif
1097                 /* devicetree and NVM differ; defer to NVM */
1098                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1099 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1100                          "by dt_monitored_battery_updates_nvm=0"
1101 #else
1102                          "for flash/NVM data memory"
1103 #endif
1104                          "\n", str, be16_to_cpup(prev), val);
1105                 return;
1106         }
1107
1108         dev_info(di->dev, "update %s to %u\n", str, val);
1109
1110         *prev = cpu_to_be16(val);
1111         buf->dirty = true;
1112 }
1113
1114 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1115 {
1116         const int limit = 100;
1117         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1118         int ret, try = limit;
1119
1120         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1121         if (ret < 0)
1122                 return ret;
1123
1124         do {
1125                 BQ27XXX_MSLEEP(25);
1126                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1127                 if (ret < 0)
1128                         return ret;
1129         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1130
1131         if (!try && di->chip != BQ27425) { // 425 has a bug
1132                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1133                 return -EINVAL;
1134         }
1135
1136         if (limit - try > 3)
1137                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1138
1139         return 0;
1140 }
1141
1142 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1143 {
1144         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1145         if (ret < 0 && ret != -EINVAL)
1146                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1147
1148         return ret;
1149 }
1150
1151 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1152 {
1153         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1154         if (ret < 0 && ret != -EINVAL)
1155                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1156
1157         return ret;
1158 }
1159
1160 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1161                                           struct bq27xxx_dm_buf *buf)
1162 {
1163         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1164         int ret;
1165
1166         if (!buf->dirty)
1167                 return 0;
1168
1169         if (cfgup) {
1170                 ret = bq27xxx_battery_set_cfgupdate(di);
1171                 if (ret < 0)
1172                         return ret;
1173         }
1174
1175         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1176         if (ret < 0)
1177                 goto out;
1178
1179         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1180         if (ret < 0)
1181                 goto out;
1182
1183         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1184         if (ret < 0)
1185                 goto out;
1186
1187         BQ27XXX_MSLEEP(1);
1188
1189         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1190         if (ret < 0)
1191                 goto out;
1192
1193         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1194                             bq27xxx_battery_checksum_dm_block(buf), true);
1195         if (ret < 0)
1196                 goto out;
1197
1198         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1199          * corruption on the '425 chip (and perhaps others), which can damage
1200          * the chip.
1201          */
1202
1203         if (cfgup) {
1204                 BQ27XXX_MSLEEP(1);
1205                 ret = bq27xxx_battery_soft_reset(di);
1206                 if (ret < 0)
1207                         return ret;
1208         } else {
1209                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1210         }
1211
1212         buf->dirty = false;
1213
1214         return 0;
1215
1216 out:
1217         if (cfgup)
1218                 bq27xxx_battery_soft_reset(di);
1219
1220         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1221         return ret;
1222 }
1223
1224 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1225                                        struct power_supply_battery_info *info)
1226 {
1227         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1228         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1229         bool updated;
1230
1231         if (bq27xxx_battery_unseal(di) < 0)
1232                 return;
1233
1234         if (info->charge_full_design_uah != -EINVAL &&
1235             info->energy_full_design_uwh != -EINVAL) {
1236                 bq27xxx_battery_read_dm_block(di, &bd);
1237                 /* assume design energy & capacity are in same block */
1238                 bq27xxx_battery_update_dm_block(di, &bd,
1239                                         BQ27XXX_DM_DESIGN_CAPACITY,
1240                                         info->charge_full_design_uah / 1000);
1241                 bq27xxx_battery_update_dm_block(di, &bd,
1242                                         BQ27XXX_DM_DESIGN_ENERGY,
1243                                         info->energy_full_design_uwh / 1000);
1244         }
1245
1246         if (info->voltage_min_design_uv != -EINVAL) {
1247                 bool same = bd.class == bt.class && bd.block == bt.block;
1248                 if (!same)
1249                         bq27xxx_battery_read_dm_block(di, &bt);
1250                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1251                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1252                                         info->voltage_min_design_uv / 1000);
1253         }
1254
1255         updated = bd.dirty || bt.dirty;
1256
1257         bq27xxx_battery_write_dm_block(di, &bd);
1258         bq27xxx_battery_write_dm_block(di, &bt);
1259
1260         bq27xxx_battery_seal(di);
1261
1262         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1263                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1264                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1265         }
1266         /* assume bq27xxx_battery_update() is called hereafter */
1267 }
1268
1269 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1270 {
1271         struct power_supply_battery_info info = {};
1272         unsigned int min, max;
1273
1274         if (power_supply_get_battery_info(di->bat, &info) < 0)
1275                 return;
1276
1277         if (!di->dm_regs) {
1278                 dev_warn(di->dev, "data memory update not supported for chip\n");
1279                 return;
1280         }
1281
1282         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1283                 if (info.energy_full_design_uwh == -EINVAL)
1284                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1285                 else if (info.charge_full_design_uah == -EINVAL)
1286                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1287         }
1288
1289         /* assume min == 0 */
1290         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1291         if (info.energy_full_design_uwh > max * 1000) {
1292                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1293                         info.energy_full_design_uwh);
1294                 info.energy_full_design_uwh = -EINVAL;
1295         }
1296
1297         /* assume min == 0 */
1298         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1299         if (info.charge_full_design_uah > max * 1000) {
1300                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1301                         info.charge_full_design_uah);
1302                 info.charge_full_design_uah = -EINVAL;
1303         }
1304
1305         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1306         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1307         if ((info.voltage_min_design_uv < min * 1000 ||
1308              info.voltage_min_design_uv > max * 1000) &&
1309              info.voltage_min_design_uv != -EINVAL) {
1310                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1311                         info.voltage_min_design_uv);
1312                 info.voltage_min_design_uv = -EINVAL;
1313         }
1314
1315         if ((info.energy_full_design_uwh != -EINVAL &&
1316              info.charge_full_design_uah != -EINVAL) ||
1317              info.voltage_min_design_uv  != -EINVAL)
1318                 bq27xxx_battery_set_config(di, &info);
1319 }
1320
1321 /*
1322  * Return the battery State-of-Charge
1323  * Or < 0 if something fails.
1324  */
1325 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1326 {
1327         int soc;
1328
1329         if (di->opts & BQ27XXX_O_ZERO)
1330                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1331         else
1332                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1333
1334         if (soc < 0)
1335                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1336
1337         return soc;
1338 }
1339
1340 /*
1341  * Return a battery charge value in µAh
1342  * Or < 0 if something fails.
1343  */
1344 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1345 {
1346         int charge;
1347
1348         charge = bq27xxx_read(di, reg, false);
1349         if (charge < 0) {
1350                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1351                         reg, charge);
1352                 return charge;
1353         }
1354
1355         if (di->opts & BQ27XXX_O_ZERO)
1356                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1357         else
1358                 charge *= 1000;
1359
1360         return charge;
1361 }
1362
1363 /*
1364  * Return the battery Nominal available capacity in µAh
1365  * Or < 0 if something fails.
1366  */
1367 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1368 {
1369         int flags;
1370
1371         if (di->opts & BQ27XXX_O_ZERO) {
1372                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1373                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1374                         return -ENODATA;
1375         }
1376
1377         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1378 }
1379
1380 /*
1381  * Return the battery Full Charge Capacity in µAh
1382  * Or < 0 if something fails.
1383  */
1384 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1385 {
1386         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1387 }
1388
1389 /*
1390  * Return the Design Capacity in µAh
1391  * Or < 0 if something fails.
1392  */
1393 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1394 {
1395         int dcap;
1396
1397         if (di->opts & BQ27XXX_O_ZERO)
1398                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1399         else
1400                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1401
1402         if (dcap < 0) {
1403                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1404                 return dcap;
1405         }
1406
1407         if (di->opts & BQ27XXX_O_ZERO)
1408                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1409         else
1410                 dcap *= 1000;
1411
1412         return dcap;
1413 }
1414
1415 /*
1416  * Return the battery Available energy in µWh
1417  * Or < 0 if something fails.
1418  */
1419 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1420 {
1421         int ae;
1422
1423         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1424         if (ae < 0) {
1425                 dev_dbg(di->dev, "error reading available energy\n");
1426                 return ae;
1427         }
1428
1429         if (di->opts & BQ27XXX_O_ZERO)
1430                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1431         else
1432                 ae *= 1000;
1433
1434         return ae;
1435 }
1436
1437 /*
1438  * Return the battery temperature in tenths of degree Kelvin
1439  * Or < 0 if something fails.
1440  */
1441 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1442 {
1443         int temp;
1444
1445         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1446         if (temp < 0) {
1447                 dev_err(di->dev, "error reading temperature\n");
1448                 return temp;
1449         }
1450
1451         if (di->opts & BQ27XXX_O_ZERO)
1452                 temp = 5 * temp / 2;
1453
1454         return temp;
1455 }
1456
1457 /*
1458  * Return the battery Cycle count total
1459  * Or < 0 if something fails.
1460  */
1461 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1462 {
1463         int cyct;
1464
1465         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1466         if (cyct < 0)
1467                 dev_err(di->dev, "error reading cycle count total\n");
1468
1469         return cyct;
1470 }
1471
1472 /*
1473  * Read a time register.
1474  * Return < 0 if something fails.
1475  */
1476 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1477 {
1478         int tval;
1479
1480         tval = bq27xxx_read(di, reg, false);
1481         if (tval < 0) {
1482                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1483                         reg, tval);
1484                 return tval;
1485         }
1486
1487         if (tval == 65535)
1488                 return -ENODATA;
1489
1490         return tval * 60;
1491 }
1492
1493 /*
1494  * Returns true if a battery over temperature condition is detected
1495  */
1496 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1497 {
1498         if (di->opts & BQ27XXX_O_OTDC)
1499                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1500         if (di->opts & BQ27XXX_O_UTOT)
1501                 return flags & BQ27XXX_FLAG_OT;
1502
1503         return false;
1504 }
1505
1506 /*
1507  * Returns true if a battery under temperature condition is detected
1508  */
1509 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1510 {
1511         if (di->opts & BQ27XXX_O_UTOT)
1512                 return flags & BQ27XXX_FLAG_UT;
1513
1514         return false;
1515 }
1516
1517 /*
1518  * Returns true if a low state of charge condition is detected
1519  */
1520 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1521 {
1522         if (di->opts & BQ27XXX_O_ZERO)
1523                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1524         else
1525                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1526 }
1527
1528 /*
1529  * Read flag register.
1530  * Return < 0 if something fails.
1531  */
1532 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1533 {
1534         int flags;
1535         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1536
1537         flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1538         if (flags < 0) {
1539                 dev_err(di->dev, "error reading flag register:%d\n", flags);
1540                 return flags;
1541         }
1542
1543         /* Unlikely but important to return first */
1544         if (unlikely(bq27xxx_battery_overtemp(di, flags)))
1545                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1546         if (unlikely(bq27xxx_battery_undertemp(di, flags)))
1547                 return POWER_SUPPLY_HEALTH_COLD;
1548         if (unlikely(bq27xxx_battery_dead(di, flags)))
1549                 return POWER_SUPPLY_HEALTH_DEAD;
1550
1551         return POWER_SUPPLY_HEALTH_GOOD;
1552 }
1553
1554 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1555 {
1556         struct bq27xxx_reg_cache cache = {0, };
1557         bool has_ci_flag = di->opts & BQ27XXX_O_ZERO;
1558         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1559
1560         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1561         if ((cache.flags & 0xff) == 0xff)
1562                 cache.flags = -1; /* read error */
1563         if (cache.flags >= 0) {
1564                 cache.temperature = bq27xxx_battery_read_temperature(di);
1565                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1566                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1567                         cache.capacity = -ENODATA;
1568                         cache.energy = -ENODATA;
1569                         cache.time_to_empty = -ENODATA;
1570                         cache.time_to_empty_avg = -ENODATA;
1571                         cache.time_to_full = -ENODATA;
1572                         cache.charge_full = -ENODATA;
1573                         cache.health = -ENODATA;
1574                 } else {
1575                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1576                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1577                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1578                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1579                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1580                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1581                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1582                         cache.capacity = bq27xxx_battery_read_soc(di);
1583                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1584                                 cache.energy = bq27xxx_battery_read_energy(di);
1585                         cache.health = bq27xxx_battery_read_health(di);
1586                 }
1587                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1588                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1589
1590                 /* We only have to read charge design full once */
1591                 if (di->charge_design_full <= 0)
1592                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1593         }
1594
1595         if (di->cache.capacity != cache.capacity)
1596                 power_supply_changed(di->bat);
1597
1598         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1599                 di->cache = cache;
1600
1601         di->last_update = jiffies;
1602 }
1603 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1604
1605 static void bq27xxx_battery_poll(struct work_struct *work)
1606 {
1607         struct bq27xxx_device_info *di =
1608                         container_of(work, struct bq27xxx_device_info,
1609                                      work.work);
1610
1611         bq27xxx_battery_update(di);
1612
1613         if (poll_interval > 0)
1614                 schedule_delayed_work(&di->work, poll_interval * HZ);
1615 }
1616
1617 /*
1618  * Return the battery average current in µA
1619  * Note that current can be negative signed as well
1620  * Or 0 if something fails.
1621  */
1622 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1623                                    union power_supply_propval *val)
1624 {
1625         int curr;
1626         int flags;
1627
1628         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1629         if (curr < 0) {
1630                 dev_err(di->dev, "error reading current\n");
1631                 return curr;
1632         }
1633
1634         if (di->opts & BQ27XXX_O_ZERO) {
1635                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1636                 if (flags & BQ27000_FLAG_CHGS) {
1637                         dev_dbg(di->dev, "negative current!\n");
1638                         curr = -curr;
1639                 }
1640
1641                 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1642         } else {
1643                 /* Other gauges return signed value */
1644                 val->intval = (int)((s16)curr) * 1000;
1645         }
1646
1647         return 0;
1648 }
1649
1650 /*
1651  * Get the average power in µW
1652  * Return < 0 if something fails.
1653  */
1654 static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
1655                                    union power_supply_propval *val)
1656 {
1657         int power;
1658
1659         power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1660         if (power < 0) {
1661                 dev_err(di->dev,
1662                         "error reading average power register %02x: %d\n",
1663                         BQ27XXX_REG_AP, power);
1664                 return power;
1665         }
1666
1667         if (di->opts & BQ27XXX_O_ZERO)
1668                 val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1669         else
1670                 /* Other gauges return a signed value in units of 10mW */
1671                 val->intval = (int)((s16)power) * 10000;
1672
1673         return 0;
1674 }
1675
1676 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1677                                   union power_supply_propval *val)
1678 {
1679         int status;
1680
1681         if (di->opts & BQ27XXX_O_ZERO) {
1682                 if (di->cache.flags & BQ27000_FLAG_FC)
1683                         status = POWER_SUPPLY_STATUS_FULL;
1684                 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1685                         status = POWER_SUPPLY_STATUS_CHARGING;
1686                 else
1687                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1688         } else {
1689                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1690                         status = POWER_SUPPLY_STATUS_FULL;
1691                 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1692                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1693                 else
1694                         status = POWER_SUPPLY_STATUS_CHARGING;
1695         }
1696
1697         if ((status == POWER_SUPPLY_STATUS_DISCHARGING) &&
1698             (power_supply_am_i_supplied(di->bat) > 0))
1699                 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1700
1701         val->intval = status;
1702
1703         return 0;
1704 }
1705
1706 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1707                                           union power_supply_propval *val)
1708 {
1709         int level;
1710
1711         if (di->opts & BQ27XXX_O_ZERO) {
1712                 if (di->cache.flags & BQ27000_FLAG_FC)
1713                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1714                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1715                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1716                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1717                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1718                 else
1719                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1720         } else {
1721                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1722                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1723                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1724                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1725                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1726                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1727                 else
1728                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1729         }
1730
1731         val->intval = level;
1732
1733         return 0;
1734 }
1735
1736 /*
1737  * Return the battery Voltage in millivolts
1738  * Or < 0 if something fails.
1739  */
1740 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1741                                    union power_supply_propval *val)
1742 {
1743         int volt;
1744
1745         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1746         if (volt < 0) {
1747                 dev_err(di->dev, "error reading voltage\n");
1748                 return volt;
1749         }
1750
1751         val->intval = volt * 1000;
1752
1753         return 0;
1754 }
1755
1756 static int bq27xxx_simple_value(int value,
1757                                 union power_supply_propval *val)
1758 {
1759         if (value < 0)
1760                 return value;
1761
1762         val->intval = value;
1763
1764         return 0;
1765 }
1766
1767 static int bq27xxx_battery_get_property(struct power_supply *psy,
1768                                         enum power_supply_property psp,
1769                                         union power_supply_propval *val)
1770 {
1771         int ret = 0;
1772         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1773
1774         mutex_lock(&di->lock);
1775         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1776                 cancel_delayed_work_sync(&di->work);
1777                 bq27xxx_battery_poll(&di->work.work);
1778         }
1779         mutex_unlock(&di->lock);
1780
1781         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1782                 return -ENODEV;
1783
1784         switch (psp) {
1785         case POWER_SUPPLY_PROP_STATUS:
1786                 ret = bq27xxx_battery_status(di, val);
1787                 break;
1788         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1789                 ret = bq27xxx_battery_voltage(di, val);
1790                 break;
1791         case POWER_SUPPLY_PROP_PRESENT:
1792                 val->intval = di->cache.flags < 0 ? 0 : 1;
1793                 break;
1794         case POWER_SUPPLY_PROP_CURRENT_NOW:
1795                 ret = bq27xxx_battery_current(di, val);
1796                 break;
1797         case POWER_SUPPLY_PROP_CAPACITY:
1798                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1799                 break;
1800         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1801                 ret = bq27xxx_battery_capacity_level(di, val);
1802                 break;
1803         case POWER_SUPPLY_PROP_TEMP:
1804                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1805                 if (ret == 0)
1806                         val->intval -= 2731; /* convert decidegree k to c */
1807                 break;
1808         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1809                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1810                 break;
1811         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1812                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1813                 break;
1814         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1815                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1816                 break;
1817         case POWER_SUPPLY_PROP_TECHNOLOGY:
1818                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1819                 break;
1820         case POWER_SUPPLY_PROP_CHARGE_NOW:
1821                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1822                 break;
1823         case POWER_SUPPLY_PROP_CHARGE_FULL:
1824                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1825                 break;
1826         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1827                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1828                 break;
1829         /*
1830          * TODO: Implement these to make registers set from
1831          * power_supply_battery_info visible in sysfs.
1832          */
1833         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1834         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1835                 return -EINVAL;
1836         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1837                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1838                 break;
1839         case POWER_SUPPLY_PROP_ENERGY_NOW:
1840                 ret = bq27xxx_simple_value(di->cache.energy, val);
1841                 break;
1842         case POWER_SUPPLY_PROP_POWER_AVG:
1843                 ret = bq27xxx_battery_pwr_avg(di, val);
1844                 break;
1845         case POWER_SUPPLY_PROP_HEALTH:
1846                 ret = bq27xxx_simple_value(di->cache.health, val);
1847                 break;
1848         case POWER_SUPPLY_PROP_MANUFACTURER:
1849                 val->strval = BQ27XXX_MANUFACTURER;
1850                 break;
1851         default:
1852                 return -EINVAL;
1853         }
1854
1855         return ret;
1856 }
1857
1858 static void bq27xxx_external_power_changed(struct power_supply *psy)
1859 {
1860         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1861
1862         cancel_delayed_work_sync(&di->work);
1863         schedule_delayed_work(&di->work, 0);
1864 }
1865
1866 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1867 {
1868         struct power_supply_desc *psy_desc;
1869         struct power_supply_config psy_cfg = {
1870                 .of_node = di->dev->of_node,
1871                 .drv_data = di,
1872         };
1873
1874         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1875         mutex_init(&di->lock);
1876
1877         di->regs       = bq27xxx_chip_data[di->chip].regs;
1878         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
1879         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
1880         di->opts       = bq27xxx_chip_data[di->chip].opts;
1881
1882         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1883         if (!psy_desc)
1884                 return -ENOMEM;
1885
1886         psy_desc->name = di->name;
1887         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1888         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
1889         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
1890         psy_desc->get_property = bq27xxx_battery_get_property;
1891         psy_desc->external_power_changed = bq27xxx_external_power_changed;
1892
1893         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1894         if (IS_ERR(di->bat)) {
1895                 if (PTR_ERR(di->bat) == -EPROBE_DEFER)
1896                         dev_dbg(di->dev, "failed to register battery, deferring probe\n");
1897                 else
1898                         dev_err(di->dev, "failed to register battery\n");
1899                 return PTR_ERR(di->bat);
1900         }
1901
1902         bq27xxx_battery_settings(di);
1903         bq27xxx_battery_update(di);
1904
1905         mutex_lock(&bq27xxx_list_lock);
1906         list_add(&di->list, &bq27xxx_battery_devices);
1907         mutex_unlock(&bq27xxx_list_lock);
1908
1909         return 0;
1910 }
1911 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1912
1913 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1914 {
1915         /*
1916          * power_supply_unregister call bq27xxx_battery_get_property which
1917          * call bq27xxx_battery_poll.
1918          * Make sure that bq27xxx_battery_poll will not call
1919          * schedule_delayed_work again after unregister (which cause OOPS).
1920          */
1921         poll_interval = 0;
1922
1923         cancel_delayed_work_sync(&di->work);
1924
1925         power_supply_unregister(di->bat);
1926
1927         mutex_lock(&bq27xxx_list_lock);
1928         list_del(&di->list);
1929         mutex_unlock(&bq27xxx_list_lock);
1930
1931         mutex_destroy(&di->lock);
1932 }
1933 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1934
1935 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1936 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
1937 MODULE_LICENSE("GPL");