drivers/power/supply/bq27xxx_battery.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * BQ27xxx battery driver
   4  *
   5  * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
   6  * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
   7  * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
   8  * Copyright (C) 2011 Pali Rohár <pali@kernel.org>
   9  * Copyright (C) 2017 Liam Breck <kernel@networkimprov.net>
  10  *
  11  * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
  12  *
  13  * Datasheets:
  14  * https://www.ti.com/product/bq27000
  15  * https://www.ti.com/product/bq27200
  16  * https://www.ti.com/product/bq27010
  17  * https://www.ti.com/product/bq27210
  18  * https://www.ti.com/product/bq27500
  19  * https://www.ti.com/product/bq27510-g1
  20  * https://www.ti.com/product/bq27510-g2
  21  * https://www.ti.com/product/bq27510-g3
  22  * https://www.ti.com/product/bq27520-g1
  23  * https://www.ti.com/product/bq27520-g2
  24  * https://www.ti.com/product/bq27520-g3
  25  * https://www.ti.com/product/bq27520-g4
  26  * https://www.ti.com/product/bq27530-g1
  27  * https://www.ti.com/product/bq27531-g1
  28  * https://www.ti.com/product/bq27541-g1
  29  * https://www.ti.com/product/bq27542-g1
  30  * https://www.ti.com/product/bq27546-g1
  31  * https://www.ti.com/product/bq27742-g1
  32  * https://www.ti.com/product/bq27545-g1
  33  * https://www.ti.com/product/bq27421-g1
  34  * https://www.ti.com/product/bq27425-g1
  35  * https://www.ti.com/product/bq27426
  36  * https://www.ti.com/product/bq27411-g1
  37  * https://www.ti.com/product/bq27441-g1
  38  * https://www.ti.com/product/bq27621-g1
  39  * https://www.ti.com/product/bq27z561
  40  * https://www.ti.com/product/bq28z610
  41  * https://www.ti.com/product/bq34z100-g1
  42  * https://www.ti.com/product/bq78z100
  43  */
  44
  45 #include <linux/device.h>
  46 #include <linux/module.h>
  47 #include <linux/mutex.h>
  48 #include <linux/param.h>
  49 #include <linux/jiffies.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/delay.h>
  52 #include <linux/platform_device.h>
  53 #include <linux/power_supply.h>
  54 #include <linux/slab.h>
  55 #include <linux/of.h>
  56
  57 #include <linux/power/bq27xxx_battery.h>
  58
  59 #define BQ27XXX_MANUFACTURER    "Texas Instruments"
  60
  61 /* BQ27XXX Flags */
  62 #define BQ27XXX_FLAG_DSC        BIT(0)
  63 #define BQ27XXX_FLAG_SOCF       BIT(1) /* State-of-Charge threshold final */
  64 #define BQ27XXX_FLAG_SOC1       BIT(2) /* State-of-Charge threshold 1 */
  65 #define BQ27XXX_FLAG_CFGUP      BIT(4)
  66 #define BQ27XXX_FLAG_FC         BIT(9)
  67 #define BQ27XXX_FLAG_OTD        BIT(14)
  68 #define BQ27XXX_FLAG_OTC        BIT(15)
  69 #define BQ27XXX_FLAG_UT         BIT(14)
  70 #define BQ27XXX_FLAG_OT         BIT(15)
  71
  72 /* BQ27000 has different layout for Flags register */
  73 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  74 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  75 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  76 #define BQ27000_FLAG_FC         BIT(5)
  77 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  78
  79 /* BQ27Z561 has different layout for Flags register */
  80 #define BQ27Z561_FLAG_FDC       BIT(4) /* Battery fully discharged */
  81 #define BQ27Z561_FLAG_FC        BIT(5) /* Battery fully charged */
  82 #define BQ27Z561_FLAG_DIS_CH    BIT(6) /* Battery is discharging */
  83
  84 /* control register params */
  85 #define BQ27XXX_SEALED                  0x20
  86 #define BQ27XXX_SET_CFGUPDATE           0x13
  87 #define BQ27XXX_SOFT_RESET              0x42
  88 #define BQ27XXX_RESET                   0x41
  89
  90 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  91 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  92 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  93
  94 #define INVALID_REG_ADDR        0xff
  95
  96 /*
  97  * bq27xxx_reg_index - Register names
  98  *
  99  * These are indexes into a device's register mapping array.
 100  */
 101
 102 enum bq27xxx_reg_index {
 103         BQ27XXX_REG_CTRL = 0,   /* Control */
 104         BQ27XXX_REG_TEMP,       /* Temperature */
 105         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
 106         BQ27XXX_REG_VOLT,       /* Voltage */
 107         BQ27XXX_REG_AI,         /* Average Current */
 108         BQ27XXX_REG_FLAGS,      /* Flags */
 109         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 110         BQ27XXX_REG_TTF,        /* Time-to-Full */
 111         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 112         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 113         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 114         BQ27XXX_REG_RC,         /* Remaining Capacity */
 115         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 116         BQ27XXX_REG_CYCT,       /* Cycle Count */
 117         BQ27XXX_REG_AE,         /* Available Energy */
 118         BQ27XXX_REG_SOC,        /* State-of-Charge */
 119         BQ27XXX_REG_DCAP,       /* Design Capacity */
 120         BQ27XXX_REG_AP,         /* Average Power */
 121         BQ27XXX_DM_CTRL,        /* Block Data Control */
 122         BQ27XXX_DM_CLASS,       /* Data Class */
 123         BQ27XXX_DM_BLOCK,       /* Data Block */
 124         BQ27XXX_DM_DATA,        /* Block Data */
 125         BQ27XXX_DM_CKSUM,       /* Block Data Checksum */
 126         BQ27XXX_REG_MAX,        /* sentinel */
 127 };
 128
 129 #define BQ27XXX_DM_REG_ROWS \
 130         [BQ27XXX_DM_CTRL] = 0x61,  \
 131         [BQ27XXX_DM_CLASS] = 0x3e, \
 132         [BQ27XXX_DM_BLOCK] = 0x3f, \
 133         [BQ27XXX_DM_DATA] = 0x40,  \
 134         [BQ27XXX_DM_CKSUM] = 0x60
 135
 136 /* Register mappings */
 137 static u8
 138         bq27000_regs[BQ27XXX_REG_MAX] = {
 139                 [BQ27XXX_REG_CTRL] = 0x00,
 140                 [BQ27XXX_REG_TEMP] = 0x06,
 141                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 142                 [BQ27XXX_REG_VOLT] = 0x08,
 143                 [BQ27XXX_REG_AI] = 0x14,
 144                 [BQ27XXX_REG_FLAGS] = 0x0a,
 145                 [BQ27XXX_REG_TTE] = 0x16,
 146                 [BQ27XXX_REG_TTF] = 0x18,
 147                 [BQ27XXX_REG_TTES] = 0x1c,
 148                 [BQ27XXX_REG_TTECP] = 0x26,
 149                 [BQ27XXX_REG_NAC] = 0x0c,
 150                 [BQ27XXX_REG_RC] = INVALID_REG_ADDR,
 151                 [BQ27XXX_REG_FCC] = 0x12,
 152                 [BQ27XXX_REG_CYCT] = 0x2a,
 153                 [BQ27XXX_REG_AE] = 0x22,
 154                 [BQ27XXX_REG_SOC] = 0x0b,
 155                 [BQ27XXX_REG_DCAP] = 0x76,
 156                 [BQ27XXX_REG_AP] = 0x24,
 157                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 158                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 159                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 160                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 161                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 162         },
 163         bq27010_regs[BQ27XXX_REG_MAX] = {
 164                 [BQ27XXX_REG_CTRL] = 0x00,
 165                 [BQ27XXX_REG_TEMP] = 0x06,
 166                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 167                 [BQ27XXX_REG_VOLT] = 0x08,
 168                 [BQ27XXX_REG_AI] = 0x14,
 169                 [BQ27XXX_REG_FLAGS] = 0x0a,
 170                 [BQ27XXX_REG_TTE] = 0x16,
 171                 [BQ27XXX_REG_TTF] = 0x18,
 172                 [BQ27XXX_REG_TTES] = 0x1c,
 173                 [BQ27XXX_REG_TTECP] = 0x26,
 174                 [BQ27XXX_REG_NAC] = 0x0c,
 175                 [BQ27XXX_REG_RC] = INVALID_REG_ADDR,
 176                 [BQ27XXX_REG_FCC] = 0x12,
 177                 [BQ27XXX_REG_CYCT] = 0x2a,
 178                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 179                 [BQ27XXX_REG_SOC] = 0x0b,
 180                 [BQ27XXX_REG_DCAP] = 0x76,
 181                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 182                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 183                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 184                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 185                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 186                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 187         },
 188         bq2750x_regs[BQ27XXX_REG_MAX] = {
 189                 [BQ27XXX_REG_CTRL] = 0x00,
 190                 [BQ27XXX_REG_TEMP] = 0x06,
 191                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 192                 [BQ27XXX_REG_VOLT] = 0x08,
 193                 [BQ27XXX_REG_AI] = 0x14,
 194                 [BQ27XXX_REG_FLAGS] = 0x0a,
 195                 [BQ27XXX_REG_TTE] = 0x16,
 196                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 197                 [BQ27XXX_REG_TTES] = 0x1a,
 198                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 199                 [BQ27XXX_REG_NAC] = 0x0c,
 200                 [BQ27XXX_REG_RC] = 0x10,
 201                 [BQ27XXX_REG_FCC] = 0x12,
 202                 [BQ27XXX_REG_CYCT] = 0x2a,
 203                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 204                 [BQ27XXX_REG_SOC] = 0x2c,
 205                 [BQ27XXX_REG_DCAP] = 0x3c,
 206                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 207                 BQ27XXX_DM_REG_ROWS,
 208         },
 209 #define bq2751x_regs bq27510g3_regs
 210 #define bq2752x_regs bq27510g3_regs
 211         bq27500_regs[BQ27XXX_REG_MAX] = {
 212                 [BQ27XXX_REG_CTRL] = 0x00,
 213                 [BQ27XXX_REG_TEMP] = 0x06,
 214                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 215                 [BQ27XXX_REG_VOLT] = 0x08,
 216                 [BQ27XXX_REG_AI] = 0x14,
 217                 [BQ27XXX_REG_FLAGS] = 0x0a,
 218                 [BQ27XXX_REG_TTE] = 0x16,
 219                 [BQ27XXX_REG_TTF] = 0x18,
 220                 [BQ27XXX_REG_TTES] = 0x1c,
 221                 [BQ27XXX_REG_TTECP] = 0x26,
 222                 [BQ27XXX_REG_NAC] = 0x0c,
 223                 [BQ27XXX_REG_RC] = 0x10,
 224                 [BQ27XXX_REG_FCC] = 0x12,
 225                 [BQ27XXX_REG_CYCT] = 0x2a,
 226                 [BQ27XXX_REG_AE] = 0x22,
 227                 [BQ27XXX_REG_SOC] = 0x2c,
 228                 [BQ27XXX_REG_DCAP] = 0x3c,
 229                 [BQ27XXX_REG_AP] = 0x24,
 230                 BQ27XXX_DM_REG_ROWS,
 231         },
 232 #define bq27510g1_regs bq27500_regs
 233 #define bq27510g2_regs bq27500_regs
 234         bq27510g3_regs[BQ27XXX_REG_MAX] = {
 235                 [BQ27XXX_REG_CTRL] = 0x00,
 236                 [BQ27XXX_REG_TEMP] = 0x06,
 237                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 238                 [BQ27XXX_REG_VOLT] = 0x08,
 239                 [BQ27XXX_REG_AI] = 0x14,
 240                 [BQ27XXX_REG_FLAGS] = 0x0a,
 241                 [BQ27XXX_REG_TTE] = 0x16,
 242                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 243                 [BQ27XXX_REG_TTES] = 0x1a,
 244                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 245                 [BQ27XXX_REG_NAC] = 0x0c,
 246                 [BQ27XXX_REG_RC] = 0x10,
 247                 [BQ27XXX_REG_FCC] = 0x12,
 248                 [BQ27XXX_REG_CYCT] = 0x1e,
 249                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 250                 [BQ27XXX_REG_SOC] = 0x20,
 251                 [BQ27XXX_REG_DCAP] = 0x2e,
 252                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 253                 BQ27XXX_DM_REG_ROWS,
 254         },
 255         bq27520g1_regs[BQ27XXX_REG_MAX] = {
 256                 [BQ27XXX_REG_CTRL] = 0x00,
 257                 [BQ27XXX_REG_TEMP] = 0x06,
 258                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 259                 [BQ27XXX_REG_VOLT] = 0x08,
 260                 [BQ27XXX_REG_AI] = 0x14,
 261                 [BQ27XXX_REG_FLAGS] = 0x0a,
 262                 [BQ27XXX_REG_TTE] = 0x16,
 263                 [BQ27XXX_REG_TTF] = 0x18,
 264                 [BQ27XXX_REG_TTES] = 0x1c,
 265                 [BQ27XXX_REG_TTECP] = 0x26,
 266                 [BQ27XXX_REG_NAC] = 0x0c,
 267                 [BQ27XXX_REG_RC] = 0x10,
 268                 [BQ27XXX_REG_FCC] = 0x12,
 269                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 270                 [BQ27XXX_REG_AE] = 0x22,
 271                 [BQ27XXX_REG_SOC] = 0x2c,
 272                 [BQ27XXX_REG_DCAP] = 0x3c,
 273                 [BQ27XXX_REG_AP] = 0x24,
 274                 BQ27XXX_DM_REG_ROWS,
 275         },
 276         bq27520g2_regs[BQ27XXX_REG_MAX] = {
 277                 [BQ27XXX_REG_CTRL] = 0x00,
 278                 [BQ27XXX_REG_TEMP] = 0x06,
 279                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 280                 [BQ27XXX_REG_VOLT] = 0x08,
 281                 [BQ27XXX_REG_AI] = 0x14,
 282                 [BQ27XXX_REG_FLAGS] = 0x0a,
 283                 [BQ27XXX_REG_TTE] = 0x16,
 284                 [BQ27XXX_REG_TTF] = 0x18,
 285                 [BQ27XXX_REG_TTES] = 0x1c,
 286                 [BQ27XXX_REG_TTECP] = 0x26,
 287                 [BQ27XXX_REG_NAC] = 0x0c,
 288                 [BQ27XXX_REG_RC] = 0x10,
 289                 [BQ27XXX_REG_FCC] = 0x12,
 290                 [BQ27XXX_REG_CYCT] = 0x2a,
 291                 [BQ27XXX_REG_AE] = 0x22,
 292                 [BQ27XXX_REG_SOC] = 0x2c,
 293                 [BQ27XXX_REG_DCAP] = 0x3c,
 294                 [BQ27XXX_REG_AP] = 0x24,
 295                 BQ27XXX_DM_REG_ROWS,
 296         },
 297         bq27520g3_regs[BQ27XXX_REG_MAX] = {
 298                 [BQ27XXX_REG_CTRL] = 0x00,
 299                 [BQ27XXX_REG_TEMP] = 0x06,
 300                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 301                 [BQ27XXX_REG_VOLT] = 0x08,
 302                 [BQ27XXX_REG_AI] = 0x14,
 303                 [BQ27XXX_REG_FLAGS] = 0x0a,
 304                 [BQ27XXX_REG_TTE] = 0x16,
 305                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 306                 [BQ27XXX_REG_TTES] = 0x1c,
 307                 [BQ27XXX_REG_TTECP] = 0x26,
 308                 [BQ27XXX_REG_NAC] = 0x0c,
 309                 [BQ27XXX_REG_RC] = 0x10,
 310                 [BQ27XXX_REG_FCC] = 0x12,
 311                 [BQ27XXX_REG_CYCT] = 0x2a,
 312                 [BQ27XXX_REG_AE] = 0x22,
 313                 [BQ27XXX_REG_SOC] = 0x2c,
 314                 [BQ27XXX_REG_DCAP] = 0x3c,
 315                 [BQ27XXX_REG_AP] = 0x24,
 316                 BQ27XXX_DM_REG_ROWS,
 317         },
 318         bq27520g4_regs[BQ27XXX_REG_MAX] = {
 319                 [BQ27XXX_REG_CTRL] = 0x00,
 320                 [BQ27XXX_REG_TEMP] = 0x06,
 321                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 322                 [BQ27XXX_REG_VOLT] = 0x08,
 323                 [BQ27XXX_REG_AI] = 0x14,
 324                 [BQ27XXX_REG_FLAGS] = 0x0a,
 325                 [BQ27XXX_REG_TTE] = 0x16,
 326                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 327                 [BQ27XXX_REG_TTES] = 0x1c,
 328                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 329                 [BQ27XXX_REG_NAC] = 0x0c,
 330                 [BQ27XXX_REG_RC] = 0x10,
 331                 [BQ27XXX_REG_FCC] = 0x12,
 332                 [BQ27XXX_REG_CYCT] = 0x1e,
 333                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 334                 [BQ27XXX_REG_SOC] = 0x20,
 335                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 336                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 337                 BQ27XXX_DM_REG_ROWS,
 338         },
 339         bq27521_regs[BQ27XXX_REG_MAX] = {
 340                 [BQ27XXX_REG_CTRL] = 0x02,
 341                 [BQ27XXX_REG_TEMP] = 0x0a,
 342                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 343                 [BQ27XXX_REG_VOLT] = 0x0c,
 344                 [BQ27XXX_REG_AI] = 0x0e,
 345                 [BQ27XXX_REG_FLAGS] = 0x08,
 346                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 347                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 348                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 349                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 350                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 351                 [BQ27XXX_REG_RC] = INVALID_REG_ADDR,
 352                 [BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
 353                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 354                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 355                 [BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
 356                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 357                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 358                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 359                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 360                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 361                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 362                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 363         },
 364         bq27530_regs[BQ27XXX_REG_MAX] = {
 365                 [BQ27XXX_REG_CTRL] = 0x00,
 366                 [BQ27XXX_REG_TEMP] = 0x06,
 367                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 368                 [BQ27XXX_REG_VOLT] = 0x08,
 369                 [BQ27XXX_REG_AI] = 0x14,
 370                 [BQ27XXX_REG_FLAGS] = 0x0a,
 371                 [BQ27XXX_REG_TTE] = 0x16,
 372                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 373                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 374                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 375                 [BQ27XXX_REG_NAC] = 0x0c,
 376                 [BQ27XXX_REG_RC] = 0x10,
 377                 [BQ27XXX_REG_FCC] = 0x12,
 378                 [BQ27XXX_REG_CYCT] = 0x2a,
 379                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 380                 [BQ27XXX_REG_SOC] = 0x2c,
 381                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 382                 [BQ27XXX_REG_AP] = 0x24,
 383                 BQ27XXX_DM_REG_ROWS,
 384         },
 385 #define bq27531_regs bq27530_regs
 386         bq27541_regs[BQ27XXX_REG_MAX] = {
 387                 [BQ27XXX_REG_CTRL] = 0x00,
 388                 [BQ27XXX_REG_TEMP] = 0x06,
 389                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 390                 [BQ27XXX_REG_VOLT] = 0x08,
 391                 [BQ27XXX_REG_AI] = 0x14,
 392                 [BQ27XXX_REG_FLAGS] = 0x0a,
 393                 [BQ27XXX_REG_TTE] = 0x16,
 394                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 395                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 396                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 397                 [BQ27XXX_REG_NAC] = 0x0c,
 398                 [BQ27XXX_REG_RC] = 0x10,
 399                 [BQ27XXX_REG_FCC] = 0x12,
 400                 [BQ27XXX_REG_CYCT] = 0x2a,
 401                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 402                 [BQ27XXX_REG_SOC] = 0x2c,
 403                 [BQ27XXX_REG_DCAP] = 0x3c,
 404                 [BQ27XXX_REG_AP] = 0x24,
 405                 BQ27XXX_DM_REG_ROWS,
 406         },
 407 #define bq27542_regs bq27541_regs
 408 #define bq27546_regs bq27541_regs
 409 #define bq27742_regs bq27541_regs
 410         bq27545_regs[BQ27XXX_REG_MAX] = {
 411                 [BQ27XXX_REG_CTRL] = 0x00,
 412                 [BQ27XXX_REG_TEMP] = 0x06,
 413                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 414                 [BQ27XXX_REG_VOLT] = 0x08,
 415                 [BQ27XXX_REG_AI] = 0x14,
 416                 [BQ27XXX_REG_FLAGS] = 0x0a,
 417                 [BQ27XXX_REG_TTE] = 0x16,
 418                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 419                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 420                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 421                 [BQ27XXX_REG_NAC] = 0x0c,
 422                 [BQ27XXX_REG_RC] = 0x10,
 423                 [BQ27XXX_REG_FCC] = 0x12,
 424                 [BQ27XXX_REG_CYCT] = 0x2a,
 425                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 426                 [BQ27XXX_REG_SOC] = 0x2c,
 427                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 428                 [BQ27XXX_REG_AP] = 0x24,
 429                 BQ27XXX_DM_REG_ROWS,
 430         },
 431         bq27421_regs[BQ27XXX_REG_MAX] = {
 432                 [BQ27XXX_REG_CTRL] = 0x00,
 433                 [BQ27XXX_REG_TEMP] = 0x02,
 434                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 435                 [BQ27XXX_REG_VOLT] = 0x04,
 436                 [BQ27XXX_REG_AI] = 0x10,
 437                 [BQ27XXX_REG_FLAGS] = 0x06,
 438                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 439                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 440                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 441                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 442                 [BQ27XXX_REG_NAC] = 0x08,
 443                 [BQ27XXX_REG_RC] = 0x0c,
 444                 [BQ27XXX_REG_FCC] = 0x0e,
 445                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 446                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 447                 [BQ27XXX_REG_SOC] = 0x1c,
 448                 [BQ27XXX_REG_DCAP] = 0x3c,
 449                 [BQ27XXX_REG_AP] = 0x18,
 450                 BQ27XXX_DM_REG_ROWS,
 451         },
 452 #define bq27411_regs bq27421_regs
 453 #define bq27425_regs bq27421_regs
 454 #define bq27426_regs bq27421_regs
 455 #define bq27441_regs bq27421_regs
 456 #define bq27621_regs bq27421_regs
 457         bq27z561_regs[BQ27XXX_REG_MAX] = {
 458                 [BQ27XXX_REG_CTRL] = 0x00,
 459                 [BQ27XXX_REG_TEMP] = 0x06,
 460                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 461                 [BQ27XXX_REG_VOLT] = 0x08,
 462                 [BQ27XXX_REG_AI] = 0x14,
 463                 [BQ27XXX_REG_FLAGS] = 0x0a,
 464                 [BQ27XXX_REG_TTE] = 0x16,
 465                 [BQ27XXX_REG_TTF] = 0x18,
 466                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 467                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 468                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 469                 [BQ27XXX_REG_RC] = 0x10,
 470                 [BQ27XXX_REG_FCC] = 0x12,
 471                 [BQ27XXX_REG_CYCT] = 0x2a,
 472                 [BQ27XXX_REG_AE] = 0x22,
 473                 [BQ27XXX_REG_SOC] = 0x2c,
 474                 [BQ27XXX_REG_DCAP] = 0x3c,
 475                 [BQ27XXX_REG_AP] = 0x22,
 476                 BQ27XXX_DM_REG_ROWS,
 477         },
 478         bq28z610_regs[BQ27XXX_REG_MAX] = {
 479                 [BQ27XXX_REG_CTRL] = 0x00,
 480                 [BQ27XXX_REG_TEMP] = 0x06,
 481                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 482                 [BQ27XXX_REG_VOLT] = 0x08,
 483                 [BQ27XXX_REG_AI] = 0x14,
 484                 [BQ27XXX_REG_FLAGS] = 0x0a,
 485                 [BQ27XXX_REG_TTE] = 0x16,
 486                 [BQ27XXX_REG_TTF] = 0x18,
 487                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 488                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 489                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 490                 [BQ27XXX_REG_RC] = 0x10,
 491                 [BQ27XXX_REG_FCC] = 0x12,
 492                 [BQ27XXX_REG_CYCT] = 0x2a,
 493                 [BQ27XXX_REG_AE] = 0x22,
 494                 [BQ27XXX_REG_SOC] = 0x2c,
 495                 [BQ27XXX_REG_DCAP] = 0x3c,
 496                 [BQ27XXX_REG_AP] = 0x22,
 497                 BQ27XXX_DM_REG_ROWS,
 498         },
 499         bq34z100_regs[BQ27XXX_REG_MAX] = {
 500                 [BQ27XXX_REG_CTRL] = 0x00,
 501                 [BQ27XXX_REG_TEMP] = 0x0c,
 502                 [BQ27XXX_REG_INT_TEMP] = 0x2a,
 503                 [BQ27XXX_REG_VOLT] = 0x08,
 504                 [BQ27XXX_REG_AI] = 0x0a,
 505                 [BQ27XXX_REG_FLAGS] = 0x0e,
 506                 [BQ27XXX_REG_TTE] = 0x18,
 507                 [BQ27XXX_REG_TTF] = 0x1a,
 508                 [BQ27XXX_REG_TTES] = 0x1e,
 509                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 510                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 511                 [BQ27XXX_REG_RC] = 0x04,
 512                 [BQ27XXX_REG_FCC] = 0x06,
 513                 [BQ27XXX_REG_CYCT] = 0x2c,
 514                 [BQ27XXX_REG_AE] = 0x24,
 515                 [BQ27XXX_REG_SOC] = 0x02,
 516                 [BQ27XXX_REG_DCAP] = 0x3c,
 517                 [BQ27XXX_REG_AP] = 0x22,
 518                 BQ27XXX_DM_REG_ROWS,
 519         },
 520         bq78z100_regs[BQ27XXX_REG_MAX] = {
 521                 [BQ27XXX_REG_CTRL] = 0x00,
 522                 [BQ27XXX_REG_TEMP] = 0x06,
 523                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 524                 [BQ27XXX_REG_VOLT] = 0x08,
 525                 [BQ27XXX_REG_AI] = 0x14,
 526                 [BQ27XXX_REG_FLAGS] = 0x0a,
 527                 [BQ27XXX_REG_TTE] = 0x16,
 528                 [BQ27XXX_REG_TTF] = 0x18,
 529                 [BQ27XXX_REG_TTES] = 0x1c,
 530                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 531                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 532                 [BQ27XXX_REG_RC] = 0x10,
 533                 [BQ27XXX_REG_FCC] = 0x12,
 534                 [BQ27XXX_REG_CYCT] = 0x2a,
 535                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 536                 [BQ27XXX_REG_SOC] = 0x2c,
 537                 [BQ27XXX_REG_DCAP] = 0x3c,
 538                 [BQ27XXX_REG_AP] = 0x22,
 539                 BQ27XXX_DM_REG_ROWS,
 540         };
 541
 542 static enum power_supply_property bq27000_props[] = {
 543         POWER_SUPPLY_PROP_STATUS,
 544         POWER_SUPPLY_PROP_PRESENT,
 545         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 546         POWER_SUPPLY_PROP_CURRENT_NOW,
 547         POWER_SUPPLY_PROP_CAPACITY,
 548         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 549         POWER_SUPPLY_PROP_TEMP,
 550         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 551         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 552         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 553         POWER_SUPPLY_PROP_TECHNOLOGY,
 554         POWER_SUPPLY_PROP_CHARGE_FULL,
 555         POWER_SUPPLY_PROP_CHARGE_NOW,
 556         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 557         POWER_SUPPLY_PROP_CYCLE_COUNT,
 558         POWER_SUPPLY_PROP_ENERGY_NOW,
 559         POWER_SUPPLY_PROP_POWER_AVG,
 560         POWER_SUPPLY_PROP_HEALTH,
 561         POWER_SUPPLY_PROP_MANUFACTURER,
 562 };
 563
 564 static enum power_supply_property bq27010_props[] = {
 565         POWER_SUPPLY_PROP_STATUS,
 566         POWER_SUPPLY_PROP_PRESENT,
 567         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 568         POWER_SUPPLY_PROP_CURRENT_NOW,
 569         POWER_SUPPLY_PROP_CAPACITY,
 570         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 571         POWER_SUPPLY_PROP_TEMP,
 572         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 573         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 574         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 575         POWER_SUPPLY_PROP_TECHNOLOGY,
 576         POWER_SUPPLY_PROP_CHARGE_FULL,
 577         POWER_SUPPLY_PROP_CHARGE_NOW,
 578         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 579         POWER_SUPPLY_PROP_CYCLE_COUNT,
 580         POWER_SUPPLY_PROP_HEALTH,
 581         POWER_SUPPLY_PROP_MANUFACTURER,
 582 };
 583
 584 #define bq2750x_props bq27510g3_props
 585 #define bq2751x_props bq27510g3_props
 586 #define bq2752x_props bq27510g3_props
 587
 588 static enum power_supply_property bq27500_props[] = {
 589         POWER_SUPPLY_PROP_STATUS,
 590         POWER_SUPPLY_PROP_PRESENT,
 591         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 592         POWER_SUPPLY_PROP_CURRENT_NOW,
 593         POWER_SUPPLY_PROP_CAPACITY,
 594         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 595         POWER_SUPPLY_PROP_TEMP,
 596         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 597         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 598         POWER_SUPPLY_PROP_TECHNOLOGY,
 599         POWER_SUPPLY_PROP_CHARGE_FULL,
 600         POWER_SUPPLY_PROP_CHARGE_NOW,
 601         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 602         POWER_SUPPLY_PROP_CYCLE_COUNT,
 603         POWER_SUPPLY_PROP_ENERGY_NOW,
 604         POWER_SUPPLY_PROP_POWER_AVG,
 605         POWER_SUPPLY_PROP_HEALTH,
 606         POWER_SUPPLY_PROP_MANUFACTURER,
 607 };
 608 #define bq27510g1_props bq27500_props
 609 #define bq27510g2_props bq27500_props
 610
 611 static enum power_supply_property bq27510g3_props[] = {
 612         POWER_SUPPLY_PROP_STATUS,
 613         POWER_SUPPLY_PROP_PRESENT,
 614         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 615         POWER_SUPPLY_PROP_CURRENT_NOW,
 616         POWER_SUPPLY_PROP_CAPACITY,
 617         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 618         POWER_SUPPLY_PROP_TEMP,
 619         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 620         POWER_SUPPLY_PROP_TECHNOLOGY,
 621         POWER_SUPPLY_PROP_CHARGE_FULL,
 622         POWER_SUPPLY_PROP_CHARGE_NOW,
 623         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 624         POWER_SUPPLY_PROP_CYCLE_COUNT,
 625         POWER_SUPPLY_PROP_HEALTH,
 626         POWER_SUPPLY_PROP_MANUFACTURER,
 627 };
 628
 629 static enum power_supply_property bq27520g1_props[] = {
 630         POWER_SUPPLY_PROP_STATUS,
 631         POWER_SUPPLY_PROP_PRESENT,
 632         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 633         POWER_SUPPLY_PROP_CURRENT_NOW,
 634         POWER_SUPPLY_PROP_CAPACITY,
 635         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 636         POWER_SUPPLY_PROP_TEMP,
 637         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 638         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 639         POWER_SUPPLY_PROP_TECHNOLOGY,
 640         POWER_SUPPLY_PROP_CHARGE_FULL,
 641         POWER_SUPPLY_PROP_CHARGE_NOW,
 642         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 643         POWER_SUPPLY_PROP_ENERGY_NOW,
 644         POWER_SUPPLY_PROP_POWER_AVG,
 645         POWER_SUPPLY_PROP_HEALTH,
 646         POWER_SUPPLY_PROP_MANUFACTURER,
 647 };
 648
 649 #define bq27520g2_props bq27500_props
 650
 651 static enum power_supply_property bq27520g3_props[] = {
 652         POWER_SUPPLY_PROP_STATUS,
 653         POWER_SUPPLY_PROP_PRESENT,
 654         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 655         POWER_SUPPLY_PROP_CURRENT_NOW,
 656         POWER_SUPPLY_PROP_CAPACITY,
 657         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 658         POWER_SUPPLY_PROP_TEMP,
 659         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 660         POWER_SUPPLY_PROP_TECHNOLOGY,
 661         POWER_SUPPLY_PROP_CHARGE_FULL,
 662         POWER_SUPPLY_PROP_CHARGE_NOW,
 663         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 664         POWER_SUPPLY_PROP_CYCLE_COUNT,
 665         POWER_SUPPLY_PROP_ENERGY_NOW,
 666         POWER_SUPPLY_PROP_POWER_AVG,
 667         POWER_SUPPLY_PROP_HEALTH,
 668         POWER_SUPPLY_PROP_MANUFACTURER,
 669 };
 670
 671 static enum power_supply_property bq27520g4_props[] = {
 672         POWER_SUPPLY_PROP_STATUS,
 673         POWER_SUPPLY_PROP_PRESENT,
 674         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 675         POWER_SUPPLY_PROP_CURRENT_NOW,
 676         POWER_SUPPLY_PROP_CAPACITY,
 677         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 678         POWER_SUPPLY_PROP_TEMP,
 679         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 680         POWER_SUPPLY_PROP_TECHNOLOGY,
 681         POWER_SUPPLY_PROP_CHARGE_FULL,
 682         POWER_SUPPLY_PROP_CHARGE_NOW,
 683         POWER_SUPPLY_PROP_CYCLE_COUNT,
 684         POWER_SUPPLY_PROP_HEALTH,
 685         POWER_SUPPLY_PROP_MANUFACTURER,
 686 };
 687
 688 static enum power_supply_property bq27521_props[] = {
 689         POWER_SUPPLY_PROP_STATUS,
 690         POWER_SUPPLY_PROP_PRESENT,
 691         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 692         POWER_SUPPLY_PROP_CURRENT_NOW,
 693         POWER_SUPPLY_PROP_TEMP,
 694         POWER_SUPPLY_PROP_TECHNOLOGY,
 695 };
 696
 697 static enum power_supply_property bq27530_props[] = {
 698         POWER_SUPPLY_PROP_STATUS,
 699         POWER_SUPPLY_PROP_PRESENT,
 700         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 701         POWER_SUPPLY_PROP_CURRENT_NOW,
 702         POWER_SUPPLY_PROP_CAPACITY,
 703         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 704         POWER_SUPPLY_PROP_TEMP,
 705         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 706         POWER_SUPPLY_PROP_TECHNOLOGY,
 707         POWER_SUPPLY_PROP_CHARGE_FULL,
 708         POWER_SUPPLY_PROP_CHARGE_NOW,
 709         POWER_SUPPLY_PROP_POWER_AVG,
 710         POWER_SUPPLY_PROP_HEALTH,
 711         POWER_SUPPLY_PROP_CYCLE_COUNT,
 712         POWER_SUPPLY_PROP_MANUFACTURER,
 713 };
 714 #define bq27531_props bq27530_props
 715
 716 static enum power_supply_property bq27541_props[] = {
 717         POWER_SUPPLY_PROP_STATUS,
 718         POWER_SUPPLY_PROP_PRESENT,
 719         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 720         POWER_SUPPLY_PROP_CURRENT_NOW,
 721         POWER_SUPPLY_PROP_CAPACITY,
 722         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 723         POWER_SUPPLY_PROP_TEMP,
 724         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 725         POWER_SUPPLY_PROP_TECHNOLOGY,
 726         POWER_SUPPLY_PROP_CHARGE_FULL,
 727         POWER_SUPPLY_PROP_CHARGE_NOW,
 728         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 729         POWER_SUPPLY_PROP_CYCLE_COUNT,
 730         POWER_SUPPLY_PROP_POWER_AVG,
 731         POWER_SUPPLY_PROP_HEALTH,
 732         POWER_SUPPLY_PROP_MANUFACTURER,
 733 };
 734 #define bq27542_props bq27541_props
 735 #define bq27546_props bq27541_props
 736 #define bq27742_props bq27541_props
 737
 738 static enum power_supply_property bq27545_props[] = {
 739         POWER_SUPPLY_PROP_STATUS,
 740         POWER_SUPPLY_PROP_PRESENT,
 741         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 742         POWER_SUPPLY_PROP_CURRENT_NOW,
 743         POWER_SUPPLY_PROP_CAPACITY,
 744         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 745         POWER_SUPPLY_PROP_TEMP,
 746         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 747         POWER_SUPPLY_PROP_TECHNOLOGY,
 748         POWER_SUPPLY_PROP_CHARGE_FULL,
 749         POWER_SUPPLY_PROP_CHARGE_NOW,
 750         POWER_SUPPLY_PROP_HEALTH,
 751         POWER_SUPPLY_PROP_CYCLE_COUNT,
 752         POWER_SUPPLY_PROP_POWER_AVG,
 753         POWER_SUPPLY_PROP_MANUFACTURER,
 754 };
 755
 756 static enum power_supply_property bq27421_props[] = {
 757         POWER_SUPPLY_PROP_STATUS,
 758         POWER_SUPPLY_PROP_PRESENT,
 759         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 760         POWER_SUPPLY_PROP_CURRENT_NOW,
 761         POWER_SUPPLY_PROP_CAPACITY,
 762         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 763         POWER_SUPPLY_PROP_TEMP,
 764         POWER_SUPPLY_PROP_TECHNOLOGY,
 765         POWER_SUPPLY_PROP_CHARGE_FULL,
 766         POWER_SUPPLY_PROP_CHARGE_NOW,
 767         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 768         POWER_SUPPLY_PROP_MANUFACTURER,
 769 };
 770 #define bq27411_props bq27421_props
 771 #define bq27425_props bq27421_props
 772 #define bq27426_props bq27421_props
 773 #define bq27441_props bq27421_props
 774 #define bq27621_props bq27421_props
 775
 776 static enum power_supply_property bq27z561_props[] = {
 777         POWER_SUPPLY_PROP_STATUS,
 778         POWER_SUPPLY_PROP_PRESENT,
 779         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 780         POWER_SUPPLY_PROP_CURRENT_NOW,
 781         POWER_SUPPLY_PROP_CAPACITY,
 782         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 783         POWER_SUPPLY_PROP_TEMP,
 784         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 785         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 786         POWER_SUPPLY_PROP_TECHNOLOGY,
 787         POWER_SUPPLY_PROP_CHARGE_FULL,
 788         POWER_SUPPLY_PROP_CHARGE_NOW,
 789         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 790         POWER_SUPPLY_PROP_CYCLE_COUNT,
 791         POWER_SUPPLY_PROP_POWER_AVG,
 792         POWER_SUPPLY_PROP_HEALTH,
 793         POWER_SUPPLY_PROP_MANUFACTURER,
 794 };
 795
 796 static enum power_supply_property bq28z610_props[] = {
 797         POWER_SUPPLY_PROP_STATUS,
 798         POWER_SUPPLY_PROP_PRESENT,
 799         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 800         POWER_SUPPLY_PROP_CURRENT_NOW,
 801         POWER_SUPPLY_PROP_CAPACITY,
 802         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 803         POWER_SUPPLY_PROP_TEMP,
 804         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 805         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 806         POWER_SUPPLY_PROP_TECHNOLOGY,
 807         POWER_SUPPLY_PROP_CHARGE_FULL,
 808         POWER_SUPPLY_PROP_CHARGE_NOW,
 809         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 810         POWER_SUPPLY_PROP_CYCLE_COUNT,
 811         POWER_SUPPLY_PROP_POWER_AVG,
 812         POWER_SUPPLY_PROP_HEALTH,
 813         POWER_SUPPLY_PROP_MANUFACTURER,
 814 };
 815
 816 static enum power_supply_property bq34z100_props[] = {
 817         POWER_SUPPLY_PROP_STATUS,
 818         POWER_SUPPLY_PROP_PRESENT,
 819         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 820         POWER_SUPPLY_PROP_CURRENT_NOW,
 821         POWER_SUPPLY_PROP_CAPACITY,
 822         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 823         POWER_SUPPLY_PROP_TEMP,
 824         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 825         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 826         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 827         POWER_SUPPLY_PROP_TECHNOLOGY,
 828         POWER_SUPPLY_PROP_CHARGE_FULL,
 829         POWER_SUPPLY_PROP_CHARGE_NOW,
 830         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 831         POWER_SUPPLY_PROP_CYCLE_COUNT,
 832         POWER_SUPPLY_PROP_ENERGY_NOW,
 833         POWER_SUPPLY_PROP_POWER_AVG,
 834         POWER_SUPPLY_PROP_HEALTH,
 835         POWER_SUPPLY_PROP_MANUFACTURER,
 836 };
 837
 838 static enum power_supply_property bq78z100_props[] = {
 839         POWER_SUPPLY_PROP_STATUS,
 840         POWER_SUPPLY_PROP_PRESENT,
 841         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 842         POWER_SUPPLY_PROP_CURRENT_NOW,
 843         POWER_SUPPLY_PROP_CAPACITY,
 844         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 845         POWER_SUPPLY_PROP_TEMP,
 846         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 847         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 848         POWER_SUPPLY_PROP_TECHNOLOGY,
 849         POWER_SUPPLY_PROP_CHARGE_FULL,
 850         POWER_SUPPLY_PROP_CHARGE_NOW,
 851         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 852         POWER_SUPPLY_PROP_CYCLE_COUNT,
 853         POWER_SUPPLY_PROP_POWER_AVG,
 854         POWER_SUPPLY_PROP_HEALTH,
 855         POWER_SUPPLY_PROP_MANUFACTURER,
 856 };
 857
 858 struct bq27xxx_dm_reg {
 859         u8 subclass_id;
 860         u8 offset;
 861         u8 bytes;
 862         u16 min, max;
 863 };
 864
 865 enum bq27xxx_dm_reg_id {
 866         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 867         BQ27XXX_DM_DESIGN_ENERGY,
 868         BQ27XXX_DM_TERMINATE_VOLTAGE,
 869 };
 870
 871 #define bq27000_dm_regs 0
 872 #define bq27010_dm_regs 0
 873 #define bq2750x_dm_regs 0
 874 #define bq2751x_dm_regs 0
 875 #define bq2752x_dm_regs 0
 876
 877 #if 0 /* not yet tested */
 878 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 879         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 10, 2,    0, 65535 },
 880         [BQ27XXX_DM_DESIGN_ENERGY]     = { }, /* missing on chip */
 881         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
 882 };
 883 #else
 884 #define bq27500_dm_regs 0
 885 #endif
 886
 887 /* todo create data memory definitions from datasheets and test on chips */
 888 #define bq27510g1_dm_regs 0
 889 #define bq27510g2_dm_regs 0
 890 #define bq27510g3_dm_regs 0
 891 #define bq27520g1_dm_regs 0
 892 #define bq27520g2_dm_regs 0
 893 #define bq27520g3_dm_regs 0
 894 #define bq27520g4_dm_regs 0
 895 #define bq27521_dm_regs 0
 896 #define bq27530_dm_regs 0
 897 #define bq27531_dm_regs 0
 898 #define bq27541_dm_regs 0
 899 #define bq27542_dm_regs 0
 900 #define bq27546_dm_regs 0
 901 #define bq27742_dm_regs 0
 902
 903 #if 0 /* not yet tested */
 904 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
 905         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 23, 2,    0, 32767 },
 906         [BQ27XXX_DM_DESIGN_ENERGY]     = { 48, 25, 2,    0, 32767 },
 907         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800,  3700 },
 908 };
 909 #else
 910 #define bq27545_dm_regs 0
 911 #endif
 912
 913 static struct bq27xxx_dm_reg bq27411_dm_regs[] = {
 914         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0, 32767 },
 915         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 916         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2800,  3700 },
 917 };
 918
 919 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
 920         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0,  8000 },
 921         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 922         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500,  3700 },
 923 };
 924
 925 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
 926         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 12, 2,    0, 32767 },
 927         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 14, 2,    0, 32767 },
 928         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800,  3700 },
 929 };
 930
 931 static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
 932         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82,  6, 2,    0,  8000 },
 933         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82,  8, 2,    0, 32767 },
 934         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 10, 2, 2500,  3700 },
 935 };
 936
 937 #if 0 /* not yet tested */
 938 #define bq27441_dm_regs bq27421_dm_regs
 939 #else
 940 #define bq27441_dm_regs 0
 941 #endif
 942
 943 #if 0 /* not yet tested */
 944 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 945         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 3, 2,    0,  8000 },
 946         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 5, 2,    0, 32767 },
 947         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500,  3700 },
 948 };
 949 #else
 950 #define bq27621_dm_regs 0
 951 #endif
 952
 953 #define bq27z561_dm_regs 0
 954 #define bq28z610_dm_regs 0
 955 #define bq34z100_dm_regs 0
 956 #define bq78z100_dm_regs 0
 957
 958 #define BQ27XXX_O_ZERO          BIT(0)
 959 #define BQ27XXX_O_OTDC          BIT(1) /* has OTC/OTD overtemperature flags */
 960 #define BQ27XXX_O_UTOT          BIT(2) /* has OT overtemperature flag */
 961 #define BQ27XXX_O_CFGUP         BIT(3)
 962 #define BQ27XXX_O_RAM           BIT(4)
 963 #define BQ27Z561_O_BITS         BIT(5)
 964 #define BQ27XXX_O_SOC_SI        BIT(6) /* SoC is single register */
 965 #define BQ27XXX_O_HAS_CI        BIT(7) /* has Capacity Inaccurate flag */
 966 #define BQ27XXX_O_MUL_CHEM      BIT(8) /* multiple chemistries supported */
 967
 968 #define BQ27XXX_DATA(ref, key, opt) {           \
 969         .opts = (opt),                          \
 970         .unseal_key = key,                      \
 971         .regs  = ref##_regs,                    \
 972         .dm_regs = ref##_dm_regs,               \
 973         .props = ref##_props,                   \
 974         .props_size = ARRAY_SIZE(ref##_props) }
 975
 976 static struct {
 977         u32 opts;
 978         u32 unseal_key;
 979         u8 *regs;
 980         struct bq27xxx_dm_reg *dm_regs;
 981         enum power_supply_property *props;
 982         size_t props_size;
 983 } bq27xxx_chip_data[] = {
 984         [BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI | BQ27XXX_O_HAS_CI),
 985         [BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI | BQ27XXX_O_HAS_CI),
 986         [BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 987         [BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 988         [BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
 989         [BQ27500]   = BQ27XXX_DATA(bq27500,   0x04143672, BQ27XXX_O_OTDC),
 990         [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0         , BQ27XXX_O_OTDC),
 991         [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0         , BQ27XXX_O_OTDC),
 992         [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0         , BQ27XXX_O_OTDC),
 993         [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0         , BQ27XXX_O_OTDC),
 994         [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 995         [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 996         [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
 997         [BQ27521]   = BQ27XXX_DATA(bq27521,   0         , 0),
 998         [BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 999         [BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
1000         [BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
1001         [BQ27542]   = BQ27XXX_DATA(bq27542,   0         , BQ27XXX_O_OTDC),
1002         [BQ27546]   = BQ27XXX_DATA(bq27546,   0         , BQ27XXX_O_OTDC),
1003         [BQ27742]   = BQ27XXX_DATA(bq27742,   0         , BQ27XXX_O_OTDC),
1004         [BQ27545]   = BQ27XXX_DATA(bq27545,   0x04143672, BQ27XXX_O_OTDC),
1005         [BQ27411]   = BQ27XXX_DATA(bq27411,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
1006         [BQ27421]   = BQ27XXX_DATA(bq27421,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
1007         [BQ27425]   = BQ27XXX_DATA(bq27425,   0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
1008         [BQ27426]   = BQ27XXX_DATA(bq27426,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
1009         [BQ27441]   = BQ27XXX_DATA(bq27441,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
1010         [BQ27621]   = BQ27XXX_DATA(bq27621,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
1011         [BQ27Z561]  = BQ27XXX_DATA(bq27z561,  0         , BQ27Z561_O_BITS),
1012         [BQ28Z610]  = BQ27XXX_DATA(bq28z610,  0         , BQ27Z561_O_BITS),
1013         [BQ34Z100]  = BQ27XXX_DATA(bq34z100,  0         , BQ27XXX_O_OTDC | BQ27XXX_O_SOC_SI | \
1014                                                           BQ27XXX_O_HAS_CI | BQ27XXX_O_MUL_CHEM),
1015         [BQ78Z100]  = BQ27XXX_DATA(bq78z100,  0         , BQ27Z561_O_BITS),
1016 };
1017
1018 static DEFINE_MUTEX(bq27xxx_list_lock);
1019 static LIST_HEAD(bq27xxx_battery_devices);
1020
1021 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
1022
1023 #define BQ27XXX_DM_SZ   32
1024
1025 /**
1026  * struct bq27xxx_dm_buf - chip data memory buffer
1027  * @class: data memory subclass_id
1028  * @block: data memory block number
1029  * @data: data from/for the block
1030  * @has_data: true if data has been filled by read
1031  * @dirty: true if data has changed since last read/write
1032  *
1033  * Encapsulates info required to manage chip data memory blocks.
1034  */
1035 struct bq27xxx_dm_buf {
1036         u8 class;
1037         u8 block;
1038         u8 data[BQ27XXX_DM_SZ];
1039         bool has_data, dirty;
1040 };
1041
1042 #define BQ27XXX_DM_BUF(di, i) { \
1043         .class = (di)->dm_regs[i].subclass_id, \
1044         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
1045 }
1046
1047 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
1048                                       struct bq27xxx_dm_reg *reg)
1049 {
1050         if (buf->class == reg->subclass_id &&
1051             buf->block == reg->offset / BQ27XXX_DM_SZ)
1052                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
1053
1054         return NULL;
1055 }
1056
1057 static const char * const bq27xxx_dm_reg_name[] = {
1058         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
1059         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
1060         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
1061 };
1062
1063
1064 static bool bq27xxx_dt_to_nvm = true;
1065 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
1066 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
1067         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
1068         "Users must set this =0 when installing a different type of battery!\n"
1069         "Default is =1."
1070 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1071         "\nSetting this affects future kernel updates, not the current configuration."
1072 #endif
1073 );
1074
1075 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
1076 {
1077         struct bq27xxx_device_info *di;
1078         unsigned int prev_val = *(unsigned int *) kp->arg;
1079         int ret;
1080
1081         ret = param_set_uint(val, kp);
1082         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
1083                 return ret;
1084
1085         mutex_lock(&bq27xxx_list_lock);
1086         list_for_each_entry(di, &bq27xxx_battery_devices, list) {
1087                 cancel_delayed_work_sync(&di->work);
1088                 schedule_delayed_work(&di->work, 0);
1089         }
1090         mutex_unlock(&bq27xxx_list_lock);
1091
1092         return ret;
1093 }
1094
1095 static const struct kernel_param_ops param_ops_poll_interval = {
1096         .get = param_get_uint,
1097         .set = poll_interval_param_set,
1098 };
1099
1100 static unsigned int poll_interval = 360;
1101 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
1102 MODULE_PARM_DESC(poll_interval,
1103                  "battery poll interval in seconds - 0 disables polling");
1104
1105 /*
1106  * Common code for BQ27xxx devices
1107  */
1108
1109 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
1110                                bool single)
1111 {
1112         int ret;
1113
1114         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1115                 return -EINVAL;
1116
1117         ret = di->bus.read(di, di->regs[reg_index], single);
1118         if (ret < 0)
1119                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
1120                         di->regs[reg_index], reg_index);
1121
1122         return ret;
1123 }
1124
1125 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
1126                                 u16 value, bool single)
1127 {
1128         int ret;
1129
1130         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1131                 return -EINVAL;
1132
1133         if (!di->bus.write)
1134                 return -EPERM;
1135
1136         ret = di->bus.write(di, di->regs[reg_index], value, single);
1137         if (ret < 0)
1138                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
1139                         di->regs[reg_index], reg_index);
1140
1141         return ret;
1142 }
1143
1144 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
1145                                      u8 *data, int len)
1146 {
1147         int ret;
1148
1149         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1150                 return -EINVAL;
1151
1152         if (!di->bus.read_bulk)
1153                 return -EPERM;
1154
1155         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
1156         if (ret < 0)
1157                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
1158                         di->regs[reg_index], reg_index);
1159
1160         return ret;
1161 }
1162
1163 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
1164                                       u8 *data, int len)
1165 {
1166         int ret;
1167
1168         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1169                 return -EINVAL;
1170
1171         if (!di->bus.write_bulk)
1172                 return -EPERM;
1173
1174         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
1175         if (ret < 0)
1176                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
1177                         di->regs[reg_index], reg_index);
1178
1179         return ret;
1180 }
1181
1182 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
1183 {
1184         int ret;
1185
1186         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
1187         if (ret < 0) {
1188                 dev_err(di->dev, "bus error on seal: %d\n", ret);
1189                 return ret;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
1196 {
1197         int ret;
1198
1199         if (di->unseal_key == 0) {
1200                 dev_err(di->dev, "unseal failed due to missing key\n");
1201                 return -EINVAL;
1202         }
1203
1204         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1205         if (ret < 0)
1206                 goto out;
1207
1208         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1209         if (ret < 0)
1210                 goto out;
1211
1212         return 0;
1213
1214 out:
1215         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1216         return ret;
1217 }
1218
1219 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1220 {
1221         u16 sum = 0;
1222         int i;
1223
1224         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1225                 sum += buf->data[i];
1226         sum &= 0xff;
1227
1228         return 0xff - sum;
1229 }
1230
1231 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1232                                          struct bq27xxx_dm_buf *buf)
1233 {
1234         int ret;
1235
1236         buf->has_data = false;
1237
1238         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1239         if (ret < 0)
1240                 goto out;
1241
1242         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1243         if (ret < 0)
1244                 goto out;
1245
1246         BQ27XXX_MSLEEP(1);
1247
1248         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1249         if (ret < 0)
1250                 goto out;
1251
1252         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1253         if (ret < 0)
1254                 goto out;
1255
1256         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1257                 ret = -EINVAL;
1258                 goto out;
1259         }
1260
1261         buf->has_data = true;
1262         buf->dirty = false;
1263
1264         return 0;
1265
1266 out:
1267         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1268         return ret;
1269 }
1270
1271 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1272                                             struct bq27xxx_dm_buf *buf,
1273                                             enum bq27xxx_dm_reg_id reg_id,
1274                                             unsigned int val)
1275 {
1276         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1277         const char *str = bq27xxx_dm_reg_name[reg_id];
1278         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1279
1280         if (prev == NULL) {
1281                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1282                 return;
1283         }
1284
1285         if (reg->bytes != 2) {
1286                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1287                 return;
1288         }
1289
1290         if (!buf->has_data)
1291                 return;
1292
1293         if (be16_to_cpup(prev) == val) {
1294                 dev_info(di->dev, "%s has %u\n", str, val);
1295                 return;
1296         }
1297
1298 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1299         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1300 #else
1301         if (!(di->opts & BQ27XXX_O_RAM)) {
1302 #endif
1303                 /* devicetree and NVM differ; defer to NVM */
1304                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1305 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1306                          "by dt_monitored_battery_updates_nvm=0"
1307 #else
1308                          "for flash/NVM data memory"
1309 #endif
1310                          "\n", str, be16_to_cpup(prev), val);
1311                 return;
1312         }
1313
1314         dev_info(di->dev, "update %s to %u\n", str, val);
1315
1316         *prev = cpu_to_be16(val);
1317         buf->dirty = true;
1318 }
1319
1320 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1321 {
1322         const int limit = 100;
1323         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1324         int ret, try = limit;
1325
1326         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1327         if (ret < 0)
1328                 return ret;
1329
1330         do {
1331                 BQ27XXX_MSLEEP(25);
1332                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1333                 if (ret < 0)
1334                         return ret;
1335         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1336
1337         if (!try && di->chip != BQ27425) { // 425 has a bug
1338                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1339                 return -EINVAL;
1340         }
1341
1342         if (limit - try > 3)
1343                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1344
1345         return 0;
1346 }
1347
1348 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1349 {
1350         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1351         if (ret < 0 && ret != -EINVAL)
1352                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1353
1354         return ret;
1355 }
1356
1357 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1358 {
1359         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1360         if (ret < 0 && ret != -EINVAL)
1361                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1362
1363         return ret;
1364 }
1365
1366 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1367                                           struct bq27xxx_dm_buf *buf)
1368 {
1369         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1370         int ret;
1371
1372         if (!buf->dirty)
1373                 return 0;
1374
1375         if (cfgup) {
1376                 ret = bq27xxx_battery_set_cfgupdate(di);
1377                 if (ret < 0)
1378                         return ret;
1379         }
1380
1381         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1382         if (ret < 0)
1383                 goto out;
1384
1385         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1386         if (ret < 0)
1387                 goto out;
1388
1389         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1390         if (ret < 0)
1391                 goto out;
1392
1393         BQ27XXX_MSLEEP(1);
1394
1395         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1396         if (ret < 0)
1397                 goto out;
1398
1399         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1400                             bq27xxx_battery_checksum_dm_block(buf), true);
1401         if (ret < 0)
1402                 goto out;
1403
1404         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1405          * corruption on the '425 chip (and perhaps others), which can damage
1406          * the chip.
1407          */
1408
1409         if (cfgup) {
1410                 BQ27XXX_MSLEEP(1);
1411                 ret = bq27xxx_battery_soft_reset(di);
1412                 if (ret < 0)
1413                         return ret;
1414         } else {
1415                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1416         }
1417
1418         buf->dirty = false;
1419
1420         return 0;
1421
1422 out:
1423         if (cfgup)
1424                 bq27xxx_battery_soft_reset(di);
1425
1426         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1427         return ret;
1428 }
1429
1430 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1431                                        struct power_supply_battery_info *info)
1432 {
1433         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1434         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1435         bool updated;
1436
1437         if (bq27xxx_battery_unseal(di) < 0)
1438                 return;
1439
1440         if (info->charge_full_design_uah != -EINVAL &&
1441             info->energy_full_design_uwh != -EINVAL) {
1442                 bq27xxx_battery_read_dm_block(di, &bd);
1443                 /* assume design energy & capacity are in same block */
1444                 bq27xxx_battery_update_dm_block(di, &bd,
1445                                         BQ27XXX_DM_DESIGN_CAPACITY,
1446                                         info->charge_full_design_uah / 1000);
1447                 bq27xxx_battery_update_dm_block(di, &bd,
1448                                         BQ27XXX_DM_DESIGN_ENERGY,
1449                                         info->energy_full_design_uwh / 1000);
1450         }
1451
1452         if (info->voltage_min_design_uv != -EINVAL) {
1453                 bool same = bd.class == bt.class && bd.block == bt.block;
1454                 if (!same)
1455                         bq27xxx_battery_read_dm_block(di, &bt);
1456                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1457                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1458                                         info->voltage_min_design_uv / 1000);
1459         }
1460
1461         updated = bd.dirty || bt.dirty;
1462
1463         bq27xxx_battery_write_dm_block(di, &bd);
1464         bq27xxx_battery_write_dm_block(di, &bt);
1465
1466         bq27xxx_battery_seal(di);
1467
1468         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1469                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1470                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1471         }
1472         /* assume bq27xxx_battery_update() is called hereafter */
1473 }
1474
1475 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1476 {
1477         struct power_supply_battery_info info = {};
1478         unsigned int min, max;
1479
1480         if (power_supply_get_battery_info(di->bat, &info) < 0)
1481                 return;
1482
1483         if (!di->dm_regs) {
1484                 dev_warn(di->dev, "data memory update not supported for chip\n");
1485                 return;
1486         }
1487
1488         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1489                 if (info.energy_full_design_uwh == -EINVAL)
1490                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1491                 else if (info.charge_full_design_uah == -EINVAL)
1492                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1493         }
1494
1495         /* assume min == 0 */
1496         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1497         if (info.energy_full_design_uwh > max * 1000) {
1498                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1499                         info.energy_full_design_uwh);
1500                 info.energy_full_design_uwh = -EINVAL;
1501         }
1502
1503         /* assume min == 0 */
1504         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1505         if (info.charge_full_design_uah > max * 1000) {
1506                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1507                         info.charge_full_design_uah);
1508                 info.charge_full_design_uah = -EINVAL;
1509         }
1510
1511         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1512         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1513         if ((info.voltage_min_design_uv < min * 1000 ||
1514              info.voltage_min_design_uv > max * 1000) &&
1515              info.voltage_min_design_uv != -EINVAL) {
1516                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1517                         info.voltage_min_design_uv);
1518                 info.voltage_min_design_uv = -EINVAL;
1519         }
1520
1521         if ((info.energy_full_design_uwh != -EINVAL &&
1522              info.charge_full_design_uah != -EINVAL) ||
1523              info.voltage_min_design_uv  != -EINVAL)
1524                 bq27xxx_battery_set_config(di, &info);
1525 }
1526
1527 /*
1528  * Return the battery State-of-Charge
1529  * Or < 0 if something fails.
1530  */
1531 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1532 {
1533         int soc;
1534
1535         if (di->opts & BQ27XXX_O_SOC_SI)
1536                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1537         else
1538                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1539
1540         if (soc < 0)
1541                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1542
1543         return soc;
1544 }
1545
1546 /*
1547  * Return a battery charge value in µAh
1548  * Or < 0 if something fails.
1549  */
1550 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1551 {
1552         int charge;
1553
1554         charge = bq27xxx_read(di, reg, false);
1555         if (charge < 0) {
1556                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1557                         reg, charge);
1558                 return charge;
1559         }
1560
1561         if (di->opts & BQ27XXX_O_ZERO)
1562                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1563         else
1564                 charge *= 1000;
1565
1566         return charge;
1567 }
1568
1569 /*
1570  * Return the battery Nominal available capacity in µAh
1571  * Or < 0 if something fails.
1572  */
1573 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1574 {
1575         int flags;
1576
1577         if (di->opts & BQ27XXX_O_ZERO) {
1578                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1579                 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1580                         return -ENODATA;
1581         }
1582
1583         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1584 }
1585
1586 /*
1587  * Return the battery Remaining Capacity in µAh
1588  * Or < 0 if something fails.
1589  */
1590 static inline int bq27xxx_battery_read_rc(struct bq27xxx_device_info *di)
1591 {
1592         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_RC);
1593 }
1594
1595 /*
1596  * Return the battery Full Charge Capacity in µAh
1597  * Or < 0 if something fails.
1598  */
1599 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1600 {
1601         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1602 }
1603
1604 /*
1605  * Return the Design Capacity in µAh
1606  * Or < 0 if something fails.
1607  */
1608 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1609 {
1610         int dcap;
1611
1612         if (di->opts & BQ27XXX_O_ZERO)
1613                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1614         else
1615                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1616
1617         if (dcap < 0) {
1618                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1619                 return dcap;
1620         }
1621
1622         if (di->opts & BQ27XXX_O_ZERO)
1623                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1624         else
1625                 dcap *= 1000;
1626
1627         return dcap;
1628 }
1629
1630 /*
1631  * Return the battery Available energy in µWh
1632  * Or < 0 if something fails.
1633  */
1634 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1635 {
1636         int ae;
1637
1638         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1639         if (ae < 0) {
1640                 dev_dbg(di->dev, "error reading available energy\n");
1641                 return ae;
1642         }
1643
1644         if (di->opts & BQ27XXX_O_ZERO)
1645                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1646         else
1647                 ae *= 1000;
1648
1649         return ae;
1650 }
1651
1652 /*
1653  * Return the battery temperature in tenths of degree Kelvin
1654  * Or < 0 if something fails.
1655  */
1656 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1657 {
1658         int temp;
1659
1660         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1661         if (temp < 0) {
1662                 dev_err(di->dev, "error reading temperature\n");
1663                 return temp;
1664         }
1665
1666         if (di->opts & BQ27XXX_O_ZERO)
1667                 temp = 5 * temp / 2;
1668
1669         return temp;
1670 }
1671
1672 /*
1673  * Return the battery Cycle count total
1674  * Or < 0 if something fails.
1675  */
1676 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1677 {
1678         int cyct;
1679
1680         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1681         if (cyct < 0)
1682                 dev_err(di->dev, "error reading cycle count total\n");
1683
1684         return cyct;
1685 }
1686
1687 /*
1688  * Read a time register.
1689  * Return < 0 if something fails.
1690  */
1691 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1692 {
1693         int tval;
1694
1695         tval = bq27xxx_read(di, reg, false);
1696         if (tval < 0) {
1697                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1698                         reg, tval);
1699                 return tval;
1700         }
1701
1702         if (tval == 65535)
1703                 return -ENODATA;
1704
1705         return tval * 60;
1706 }
1707
1708 /*
1709  * Returns true if a battery over temperature condition is detected
1710  */
1711 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1712 {
1713         if (di->opts & BQ27XXX_O_OTDC)
1714                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1715         if (di->opts & BQ27XXX_O_UTOT)
1716                 return flags & BQ27XXX_FLAG_OT;
1717
1718         return false;
1719 }
1720
1721 /*
1722  * Returns true if a battery under temperature condition is detected
1723  */
1724 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1725 {
1726         if (di->opts & BQ27XXX_O_UTOT)
1727                 return flags & BQ27XXX_FLAG_UT;
1728
1729         return false;
1730 }
1731
1732 /*
1733  * Returns true if a low state of charge condition is detected
1734  */
1735 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1736 {
1737         if (di->opts & BQ27XXX_O_ZERO)
1738                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1739         else if (di->opts & BQ27Z561_O_BITS)
1740                 return flags & BQ27Z561_FLAG_FDC;
1741         else
1742                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1743 }
1744
1745 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1746 {
1747         /* Unlikely but important to return first */
1748         if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
1749                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1750         if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
1751                 return POWER_SUPPLY_HEALTH_COLD;
1752         if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
1753                 return POWER_SUPPLY_HEALTH_DEAD;
1754
1755         return POWER_SUPPLY_HEALTH_GOOD;
1756 }
1757
1758 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1759 {
1760         struct bq27xxx_reg_cache cache = {0, };
1761         bool has_ci_flag = di->opts & BQ27XXX_O_HAS_CI;
1762         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1763
1764         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1765         if ((cache.flags & 0xff) == 0xff)
1766                 cache.flags = -1; /* read error */
1767         if (cache.flags >= 0) {
1768                 cache.temperature = bq27xxx_battery_read_temperature(di);
1769                 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1770                         dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1771                         cache.capacity = -ENODATA;
1772                         cache.energy = -ENODATA;
1773                         cache.time_to_empty = -ENODATA;
1774                         cache.time_to_empty_avg = -ENODATA;
1775                         cache.time_to_full = -ENODATA;
1776                         cache.charge_full = -ENODATA;
1777                         cache.health = -ENODATA;
1778                 } else {
1779                         if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1780                                 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1781                         if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1782                                 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1783                         if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1784                                 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1785
1786                         cache.charge_full = bq27xxx_battery_read_fcc(di);
1787                         cache.capacity = bq27xxx_battery_read_soc(di);
1788                         if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1789                                 cache.energy = bq27xxx_battery_read_energy(di);
1790                         di->cache.flags = cache.flags;
1791                         cache.health = bq27xxx_battery_read_health(di);
1792                 }
1793                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1794                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1795
1796                 /* We only have to read charge design full once */
1797                 if (di->charge_design_full <= 0)
1798                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1799         }
1800
1801         if ((di->cache.capacity != cache.capacity) ||
1802             (di->cache.flags != cache.flags))
1803                 power_supply_changed(di->bat);
1804
1805         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1806                 di->cache = cache;
1807
1808         di->last_update = jiffies;
1809 }
1810 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1811
1812 static void bq27xxx_battery_poll(struct work_struct *work)
1813 {
1814         struct bq27xxx_device_info *di =
1815                         container_of(work, struct bq27xxx_device_info,
1816                                      work.work);
1817
1818         bq27xxx_battery_update(di);
1819
1820         if (poll_interval > 0)
1821                 schedule_delayed_work(&di->work, poll_interval * HZ);
1822 }
1823
1824 static bool bq27xxx_battery_is_full(struct bq27xxx_device_info *di, int flags)
1825 {
1826         if (di->opts & BQ27XXX_O_ZERO)
1827                 return (flags & BQ27000_FLAG_FC);
1828         else if (di->opts & BQ27Z561_O_BITS)
1829                 return (flags & BQ27Z561_FLAG_FC);
1830         else
1831                 return (flags & BQ27XXX_FLAG_FC);
1832 }
1833
1834 /*
1835  * Return the battery average current in µA and the status
1836  * Note that current can be negative signed as well
1837  * Or 0 if something fails.
1838  */
1839 static int bq27xxx_battery_current_and_status(
1840         struct bq27xxx_device_info *di,
1841         union power_supply_propval *val_curr,
1842         union power_supply_propval *val_status)
1843 {
1844         bool single_flags = (di->opts & BQ27XXX_O_ZERO);
1845         int curr;
1846         int flags;
1847
1848         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1849         if (curr < 0) {
1850                 dev_err(di->dev, "error reading current\n");
1851                 return curr;
1852         }
1853
1854         flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, single_flags);
1855         if (flags < 0) {
1856                 dev_err(di->dev, "error reading flags\n");
1857                 return flags;
1858         }
1859
1860         if (di->opts & BQ27XXX_O_ZERO) {
1861                 if (!(flags & BQ27000_FLAG_CHGS)) {
1862                         dev_dbg(di->dev, "negative current!\n");
1863                         curr = -curr;
1864                 }
1865
1866                 curr = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1867         } else {
1868                 /* Other gauges return signed value */
1869                 curr = (int)((s16)curr) * 1000;
1870         }
1871
1872         if (val_curr)
1873                 val_curr->intval = curr;
1874
1875         if (val_status) {
1876                 if (curr > 0) {
1877                         val_status->intval = POWER_SUPPLY_STATUS_CHARGING;
1878                 } else if (curr < 0) {
1879                         val_status->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1880                 } else {
1881                         if (bq27xxx_battery_is_full(di, flags))
1882                                 val_status->intval = POWER_SUPPLY_STATUS_FULL;
1883                         else
1884                                 val_status->intval =
1885                                         POWER_SUPPLY_STATUS_NOT_CHARGING;
1886                 }
1887         }
1888
1889         return 0;
1890 }
1891
1892 /*
1893  * Get the average power in µW
1894  * Return < 0 if something fails.
1895  */
1896 static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
1897                                    union power_supply_propval *val)
1898 {
1899         int power;
1900
1901         power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1902         if (power < 0) {
1903                 dev_err(di->dev,
1904                         "error reading average power register %02x: %d\n",
1905                         BQ27XXX_REG_AP, power);
1906                 return power;
1907         }
1908
1909         if (di->opts & BQ27XXX_O_ZERO)
1910                 val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1911         else
1912                 /* Other gauges return a signed value in units of 10mW */
1913                 val->intval = (int)((s16)power) * 10000;
1914
1915         return 0;
1916 }
1917
1918 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1919                                           union power_supply_propval *val)
1920 {
1921         int level;
1922
1923         if (di->opts & BQ27XXX_O_ZERO) {
1924                 if (di->cache.flags & BQ27000_FLAG_FC)
1925                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1926                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1927                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1928                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1929                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1930                 else
1931                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1932         } else if (di->opts & BQ27Z561_O_BITS) {
1933                 if (di->cache.flags & BQ27Z561_FLAG_FC)
1934                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1935                 else if (di->cache.flags & BQ27Z561_FLAG_FDC)
1936                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1937                 else
1938                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1939         } else {
1940                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1941                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1942                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1943                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1944                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1945                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1946                 else
1947                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1948         }
1949
1950         val->intval = level;
1951
1952         return 0;
1953 }
1954
1955 /*
1956  * Return the battery Voltage in millivolts
1957  * Or < 0 if something fails.
1958  */
1959 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1960                                    union power_supply_propval *val)
1961 {
1962         int volt;
1963
1964         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1965         if (volt < 0) {
1966                 dev_err(di->dev, "error reading voltage\n");
1967                 return volt;
1968         }
1969
1970         val->intval = volt * 1000;
1971
1972         return 0;
1973 }
1974
1975 static int bq27xxx_simple_value(int value,
1976                                 union power_supply_propval *val)
1977 {
1978         if (value < 0)
1979                 return value;
1980
1981         val->intval = value;
1982
1983         return 0;
1984 }
1985
1986 static int bq27xxx_battery_get_property(struct power_supply *psy,
1987                                         enum power_supply_property psp,
1988                                         union power_supply_propval *val)
1989 {
1990         int ret = 0;
1991         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1992
1993         mutex_lock(&di->lock);
1994         if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1995                 cancel_delayed_work_sync(&di->work);
1996                 bq27xxx_battery_poll(&di->work.work);
1997         }
1998         mutex_unlock(&di->lock);
1999
2000         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
2001                 return -ENODEV;
2002
2003         switch (psp) {
2004         case POWER_SUPPLY_PROP_STATUS:
2005                 ret = bq27xxx_battery_current_and_status(di, NULL, val);
2006                 break;
2007         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2008                 ret = bq27xxx_battery_voltage(di, val);
2009                 break;
2010         case POWER_SUPPLY_PROP_PRESENT:
2011                 val->intval = di->cache.flags < 0 ? 0 : 1;
2012                 break;
2013         case POWER_SUPPLY_PROP_CURRENT_NOW:
2014                 ret = bq27xxx_battery_current_and_status(di, val, NULL);
2015                 break;
2016         case POWER_SUPPLY_PROP_CAPACITY:
2017                 ret = bq27xxx_simple_value(di->cache.capacity, val);
2018                 break;
2019         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
2020                 ret = bq27xxx_battery_capacity_level(di, val);
2021                 break;
2022         case POWER_SUPPLY_PROP_TEMP:
2023                 ret = bq27xxx_simple_value(di->cache.temperature, val);
2024                 if (ret == 0)
2025                         val->intval -= 2731; /* convert decidegree k to c */
2026                 break;
2027         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
2028                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
2029                 break;
2030         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
2031                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
2032                 break;
2033         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
2034                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
2035                 break;
2036         case POWER_SUPPLY_PROP_TECHNOLOGY:
2037                 if (di->opts & BQ27XXX_O_MUL_CHEM)
2038                         val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
2039                 else
2040                         val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
2041                 break;
2042         case POWER_SUPPLY_PROP_CHARGE_NOW:
2043                 if (di->regs[BQ27XXX_REG_NAC] != INVALID_REG_ADDR)
2044                         ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
2045                 else
2046                         ret = bq27xxx_simple_value(bq27xxx_battery_read_rc(di), val);
2047                 break;
2048         case POWER_SUPPLY_PROP_CHARGE_FULL:
2049                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
2050                 break;
2051         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
2052                 ret = bq27xxx_simple_value(di->charge_design_full, val);
2053                 break;
2054         /*
2055          * TODO: Implement these to make registers set from
2056          * power_supply_battery_info visible in sysfs.
2057          */
2058         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
2059         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
2060                 return -EINVAL;
2061         case POWER_SUPPLY_PROP_CYCLE_COUNT:
2062                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
2063                 break;
2064         case POWER_SUPPLY_PROP_ENERGY_NOW:
2065                 ret = bq27xxx_simple_value(di->cache.energy, val);
2066                 break;
2067         case POWER_SUPPLY_PROP_POWER_AVG:
2068                 ret = bq27xxx_battery_pwr_avg(di, val);
2069                 break;
2070         case POWER_SUPPLY_PROP_HEALTH:
2071                 ret = bq27xxx_simple_value(di->cache.health, val);
2072                 break;
2073         case POWER_SUPPLY_PROP_MANUFACTURER:
2074                 val->strval = BQ27XXX_MANUFACTURER;
2075                 break;
2076         default:
2077                 return -EINVAL;
2078         }
2079
2080         return ret;
2081 }
2082
2083 static void bq27xxx_external_power_changed(struct power_supply *psy)
2084 {
2085         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
2086
2087         cancel_delayed_work_sync(&di->work);
2088         schedule_delayed_work(&di->work, 0);
2089 }
2090
2091 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
2092 {
2093         struct power_supply_desc *psy_desc;
2094         struct power_supply_config psy_cfg = {
2095                 .of_node = di->dev->of_node,
2096                 .drv_data = di,
2097         };
2098
2099         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
2100         mutex_init(&di->lock);
2101
2102         di->regs       = bq27xxx_chip_data[di->chip].regs;
2103         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
2104         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
2105         di->opts       = bq27xxx_chip_data[di->chip].opts;
2106
2107         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
2108         if (!psy_desc)
2109                 return -ENOMEM;
2110
2111         psy_desc->name = di->name;
2112         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
2113         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
2114         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
2115         psy_desc->get_property = bq27xxx_battery_get_property;
2116         psy_desc->external_power_changed = bq27xxx_external_power_changed;
2117
2118         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
2119         if (IS_ERR(di->bat))
2120                 return dev_err_probe(di->dev, PTR_ERR(di->bat),
2121                                      "failed to register battery\n");
2122
2123         bq27xxx_battery_settings(di);
2124         bq27xxx_battery_update(di);
2125
2126         mutex_lock(&bq27xxx_list_lock);
2127         list_add(&di->list, &bq27xxx_battery_devices);
2128         mutex_unlock(&bq27xxx_list_lock);
2129
2130         return 0;
2131 }
2132 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
2133
2134 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
2135 {
2136         /*
2137          * power_supply_unregister call bq27xxx_battery_get_property which
2138          * call bq27xxx_battery_poll.
2139          * Make sure that bq27xxx_battery_poll will not call
2140          * schedule_delayed_work again after unregister (which cause OOPS).
2141          */
2142         poll_interval = 0;
2143
2144         cancel_delayed_work_sync(&di->work);
2145
2146         power_supply_unregister(di->bat);
2147
2148         mutex_lock(&bq27xxx_list_lock);
2149         list_del(&di->list);
2150         mutex_unlock(&bq27xxx_list_lock);
2151
2152         mutex_destroy(&di->lock);
2153 }
2154 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
2155
2156 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
2157 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
2158 MODULE_LICENSE("GPL");