linux/drivers/power/supply/bq27xxx_battery.c
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   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
 100enum 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 */
 134static 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
 441static 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
 463static 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
 487static 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
 510static 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
 528static 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
 550static 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
 570static 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
 587static 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
 596static 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
 615static 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
 637static 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
 655static 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
 675struct bq27xxx_dm_reg {
 676        u8 subclass_id;
 677        u8 offset;
 678        u8 bytes;
 679        u16 min, max;
 680};
 681
 682enum 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 */
 695static 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 */
 721static 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
 730static 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
 736static 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
 742static 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
 748static 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 */
 761static 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
 784static 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
 821static DEFINE_MUTEX(bq27xxx_list_lock);
 822static 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 */
 838struct 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
 850static 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
 860static 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
 867static bool bq27xxx_dt_to_nvm = true;
 868module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
 869MODULE_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
 878static 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
 898static const struct kernel_param_ops param_ops_poll_interval = {
 899        .get = param_get_uint,
 900        .set = poll_interval_param_set,
 901};
 902
 903static unsigned int poll_interval = 360;
 904module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
 905MODULE_PARM_DESC(poll_interval,
 906                 "battery poll interval in seconds - 0 disables polling");
 907
 908/*
 909 * Common code for BQ27xxx devices
 910 */
 911
 912static 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
 928static 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
 947static 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
 966static 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
 985static 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
 998static 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
1017out:
1018        dev_err(di->dev, "bus error on unseal: %d\n", ret);
1019        return ret;
1020}
1021
1022static 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
1034static 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
1069out:
1070        dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1071        return ret;
1072}
1073
1074static 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
1123static 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
1151static 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
1160static 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
1169static 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
1225out:
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
1233static 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
1278static 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 */
1334static 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 */
1353static 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 */
1376static 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 */
1393static 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 */
1402static 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 */
1428static 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 */
1450static 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 */
1470static 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 */
1485static 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 */
1506static 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 */
1526static 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 */
1539static 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 */
1550static 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
1558static 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
1571void 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                power_supply_changed(di->bat);
1617
1618        if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1619                di->cache = cache;
1620
1621        di->last_update = jiffies;
1622}
1623EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1624
1625static void bq27xxx_battery_poll(struct work_struct *work)
1626{
1627        struct bq27xxx_device_info *di =
1628                        container_of(work, struct bq27xxx_device_info,
1629                                     work.work);
1630
1631        bq27xxx_battery_update(di);
1632
1633        if (poll_interval > 0)
1634                schedule_delayed_work(&di->work, poll_interval * HZ);
1635}
1636
1637/*
1638 * Return the battery average current in µA
1639 * Note that current can be negative signed as well
1640 * Or 0 if something fails.
1641 */
1642static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1643                                   union power_supply_propval *val)
1644{
1645        int curr;
1646        int flags;
1647
1648        curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1649        if (curr < 0) {
1650                dev_err(di->dev, "error reading current\n");
1651                return curr;
1652        }
1653
1654        if (di->opts & BQ27XXX_O_ZERO) {
1655                flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1656                if (flags & BQ27000_FLAG_CHGS) {
1657                        dev_dbg(di->dev, "negative current!\n");
1658                        curr = -curr;
1659                }
1660
1661                val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1662        } else {
1663                /* Other gauges return signed value */
1664                val->intval = (int)((s16)curr) * 1000;
1665        }
1666
1667        return 0;
1668}
1669
1670static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1671                                  union power_supply_propval *val)
1672{
1673        int status;
1674
1675        if (di->opts & BQ27XXX_O_ZERO) {
1676                if (di->cache.flags & BQ27000_FLAG_FC)
1677                        status = POWER_SUPPLY_STATUS_FULL;
1678                else if (di->cache.flags & BQ27000_FLAG_CHGS)
1679                        status = POWER_SUPPLY_STATUS_CHARGING;
1680                else if (power_supply_am_i_supplied(di->bat) > 0)
1681                        status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1682                else
1683                        status = POWER_SUPPLY_STATUS_DISCHARGING;
1684        } else {
1685                if (di->cache.flags & BQ27XXX_FLAG_FC)
1686                        status = POWER_SUPPLY_STATUS_FULL;
1687                else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1688                        status = POWER_SUPPLY_STATUS_DISCHARGING;
1689                else
1690                        status = POWER_SUPPLY_STATUS_CHARGING;
1691        }
1692
1693        val->intval = status;
1694
1695        return 0;
1696}
1697
1698static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1699                                          union power_supply_propval *val)
1700{
1701        int level;
1702
1703        if (di->opts & BQ27XXX_O_ZERO) {
1704                if (di->cache.flags & BQ27000_FLAG_FC)
1705                        level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1706                else if (di->cache.flags & BQ27000_FLAG_EDV1)
1707                        level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1708                else if (di->cache.flags & BQ27000_FLAG_EDVF)
1709                        level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1710                else
1711                        level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1712        } else {
1713                if (di->cache.flags & BQ27XXX_FLAG_FC)
1714                        level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1715                else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1716                        level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1717                else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1718                        level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1719                else
1720                        level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1721        }
1722
1723        val->intval = level;
1724
1725        return 0;
1726}
1727
1728/*
1729 * Return the battery Voltage in millivolts
1730 * Or < 0 if something fails.
1731 */
1732static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1733                                   union power_supply_propval *val)
1734{
1735        int volt;
1736
1737        volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1738        if (volt < 0) {
1739                dev_err(di->dev, "error reading voltage\n");
1740                return volt;
1741        }
1742
1743        val->intval = volt * 1000;
1744
1745        return 0;
1746}
1747
1748static int bq27xxx_simple_value(int value,
1749                                union power_supply_propval *val)
1750{
1751        if (value < 0)
1752                return value;
1753
1754        val->intval = value;
1755
1756        return 0;
1757}
1758
1759static int bq27xxx_battery_get_property(struct power_supply *psy,
1760                                        enum power_supply_property psp,
1761                                        union power_supply_propval *val)
1762{
1763        int ret = 0;
1764        struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1765
1766        mutex_lock(&di->lock);
1767        if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1768                cancel_delayed_work_sync(&di->work);
1769                bq27xxx_battery_poll(&di->work.work);
1770        }
1771        mutex_unlock(&di->lock);
1772
1773        if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1774                return -ENODEV;
1775
1776        switch (psp) {
1777        case POWER_SUPPLY_PROP_STATUS:
1778                ret = bq27xxx_battery_status(di, val);
1779                break;
1780        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1781                ret = bq27xxx_battery_voltage(di, val);
1782                break;
1783        case POWER_SUPPLY_PROP_PRESENT:
1784                val->intval = di->cache.flags < 0 ? 0 : 1;
1785                break;
1786        case POWER_SUPPLY_PROP_CURRENT_NOW:
1787                ret = bq27xxx_battery_current(di, val);
1788                break;
1789        case POWER_SUPPLY_PROP_CAPACITY:
1790                ret = bq27xxx_simple_value(di->cache.capacity, val);
1791                break;
1792        case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1793                ret = bq27xxx_battery_capacity_level(di, val);
1794                break;
1795        case POWER_SUPPLY_PROP_TEMP:
1796                ret = bq27xxx_simple_value(di->cache.temperature, val);
1797                if (ret == 0)
1798                        val->intval -= 2731; /* convert decidegree k to c */
1799                break;
1800        case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1801                ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1802                break;
1803        case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1804                ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1805                break;
1806        case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1807                ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1808                break;
1809        case POWER_SUPPLY_PROP_TECHNOLOGY:
1810                val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1811                break;
1812        case POWER_SUPPLY_PROP_CHARGE_NOW:
1813                ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1814                break;
1815        case POWER_SUPPLY_PROP_CHARGE_FULL:
1816                ret = bq27xxx_simple_value(di->cache.charge_full, val);
1817                break;
1818        case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1819                ret = bq27xxx_simple_value(di->charge_design_full, val);
1820                break;
1821        /*
1822         * TODO: Implement these to make registers set from
1823         * power_supply_battery_info visible in sysfs.
1824         */
1825        case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1826        case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1827                return -EINVAL;
1828        case POWER_SUPPLY_PROP_CYCLE_COUNT:
1829                ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1830                break;
1831        case POWER_SUPPLY_PROP_ENERGY_NOW:
1832                ret = bq27xxx_simple_value(di->cache.energy, val);
1833                break;
1834        case POWER_SUPPLY_PROP_POWER_AVG:
1835                ret = bq27xxx_simple_value(di->cache.power_avg, val);
1836                break;
1837        case POWER_SUPPLY_PROP_HEALTH:
1838                ret = bq27xxx_simple_value(di->cache.health, val);
1839                break;
1840        case POWER_SUPPLY_PROP_MANUFACTURER:
1841                val->strval = BQ27XXX_MANUFACTURER;
1842                break;
1843        default:
1844                return -EINVAL;
1845        }
1846
1847        return ret;
1848}
1849
1850static void bq27xxx_external_power_changed(struct power_supply *psy)
1851{
1852        struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1853
1854        cancel_delayed_work_sync(&di->work);
1855        schedule_delayed_work(&di->work, 0);
1856}
1857
1858int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1859{
1860        struct power_supply_desc *psy_desc;
1861        struct power_supply_config psy_cfg = {
1862                .of_node = di->dev->of_node,
1863                .drv_data = di,
1864        };
1865
1866        INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1867        mutex_init(&di->lock);
1868
1869        di->regs       = bq27xxx_chip_data[di->chip].regs;
1870        di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
1871        di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
1872        di->opts       = bq27xxx_chip_data[di->chip].opts;
1873
1874        psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1875        if (!psy_desc)
1876                return -ENOMEM;
1877
1878        psy_desc->name = di->name;
1879        psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1880        psy_desc->properties = bq27xxx_chip_data[di->chip].props;
1881        psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
1882        psy_desc->get_property = bq27xxx_battery_get_property;
1883        psy_desc->external_power_changed = bq27xxx_external_power_changed;
1884
1885        di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1886        if (IS_ERR(di->bat)) {
1887                dev_err(di->dev, "failed to register battery\n");
1888                return PTR_ERR(di->bat);
1889        }
1890
1891        bq27xxx_battery_settings(di);
1892        bq27xxx_battery_update(di);
1893
1894        mutex_lock(&bq27xxx_list_lock);
1895        list_add(&di->list, &bq27xxx_battery_devices);
1896        mutex_unlock(&bq27xxx_list_lock);
1897
1898        return 0;
1899}
1900EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1901
1902void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1903{
1904        /*
1905         * power_supply_unregister call bq27xxx_battery_get_property which
1906         * call bq27xxx_battery_poll.
1907         * Make sure that bq27xxx_battery_poll will not call
1908         * schedule_delayed_work again after unregister (which cause OOPS).
1909         */
1910        poll_interval = 0;
1911
1912        cancel_delayed_work_sync(&di->work);
1913
1914        power_supply_unregister(di->bat);
1915
1916        mutex_lock(&bq27xxx_list_lock);
1917        list_del(&di->list);
1918        mutex_unlock(&bq27xxx_list_lock);
1919
1920        mutex_destroy(&di->lock);
1921}
1922EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1923
1924MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1925MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
1926MODULE_LICENSE("GPL");
1927