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 NULL
 872 #define bq27010_dm_regs NULL
 873 #define bq2750x_dm_regs NULL
 874 #define bq2751x_dm_regs NULL
 875 #define bq2752x_dm_regs NULL
 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 NULL
 885 #endif
 886
 887 /* todo create data memory definitions from datasheets and test on chips */
 888 #define bq27510g1_dm_regs NULL
 889 #define bq27510g2_dm_regs NULL
 890 #define bq27510g3_dm_regs NULL
 891 #define bq27520g1_dm_regs NULL
 892 #define bq27520g2_dm_regs NULL
 893 #define bq27520g3_dm_regs NULL
 894 #define bq27520g4_dm_regs NULL
 895 #define bq27521_dm_regs NULL
 896 #define bq27530_dm_regs NULL
 897 #define bq27531_dm_regs NULL
 898 #define bq27541_dm_regs NULL
 899 #define bq27542_dm_regs NULL
 900 #define bq27546_dm_regs NULL
 901 #define bq27742_dm_regs NULL
 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 NULL
 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 NULL
 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 NULL
 951 #endif
 952
 953 #define bq27z561_dm_regs NULL
 954 #define bq28z610_dm_regs NULL
 955 #define bq34z100_dm_regs NULL
 956 #define bq78z100_dm_regs NULL
 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 __be16 *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 (__be16 *) (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                 mod_delayed_work(system_wq, &di->work, 0);
1088         mutex_unlock(&bq27xxx_list_lock);
1089
1090         return ret;
1091 }
1092
1093 static const struct kernel_param_ops param_ops_poll_interval = {
1094         .get = param_get_uint,
1095         .set = poll_interval_param_set,
1096 };
1097
1098 static unsigned int poll_interval = 360;
1099 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
1100 MODULE_PARM_DESC(poll_interval,
1101                  "battery poll interval in seconds - 0 disables polling");
1102
1103 /*
1104  * Common code for BQ27xxx devices
1105  */
1106
1107 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
1108                                bool single)
1109 {
1110         int ret;
1111
1112         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1113                 return -EINVAL;
1114
1115         ret = di->bus.read(di, di->regs[reg_index], single);
1116         if (ret < 0)
1117                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
1118                         di->regs[reg_index], reg_index);
1119
1120         return ret;
1121 }
1122
1123 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
1124                                 u16 value, bool single)
1125 {
1126         int ret;
1127
1128         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1129                 return -EINVAL;
1130
1131         if (!di->bus.write)
1132                 return -EPERM;
1133
1134         ret = di->bus.write(di, di->regs[reg_index], value, single);
1135         if (ret < 0)
1136                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
1137                         di->regs[reg_index], reg_index);
1138
1139         return ret;
1140 }
1141
1142 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
1143                                      u8 *data, int len)
1144 {
1145         int ret;
1146
1147         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1148                 return -EINVAL;
1149
1150         if (!di->bus.read_bulk)
1151                 return -EPERM;
1152
1153         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
1154         if (ret < 0)
1155                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
1156                         di->regs[reg_index], reg_index);
1157
1158         return ret;
1159 }
1160
1161 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
1162                                       u8 *data, int len)
1163 {
1164         int ret;
1165
1166         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1167                 return -EINVAL;
1168
1169         if (!di->bus.write_bulk)
1170                 return -EPERM;
1171
1172         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
1173         if (ret < 0)
1174                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
1175                         di->regs[reg_index], reg_index);
1176
1177         return ret;
1178 }
1179
1180 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
1181 {
1182         int ret;
1183
1184         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
1185         if (ret < 0) {
1186                 dev_err(di->dev, "bus error on seal: %d\n", ret);
1187                 return ret;
1188         }
1189
1190         return 0;
1191 }
1192
1193 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
1194 {
1195         int ret;
1196
1197         if (di->unseal_key == 0) {
1198                 dev_err(di->dev, "unseal failed due to missing key\n");
1199                 return -EINVAL;
1200         }
1201
1202         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1203         if (ret < 0)
1204                 goto out;
1205
1206         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1207         if (ret < 0)
1208                 goto out;
1209
1210         return 0;
1211
1212 out:
1213         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1214         return ret;
1215 }
1216
1217 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1218 {
1219         u16 sum = 0;
1220         int i;
1221
1222         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1223                 sum += buf->data[i];
1224         sum &= 0xff;
1225
1226         return 0xff - sum;
1227 }
1228
1229 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1230                                          struct bq27xxx_dm_buf *buf)
1231 {
1232         int ret;
1233
1234         buf->has_data = false;
1235
1236         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1237         if (ret < 0)
1238                 goto out;
1239
1240         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1241         if (ret < 0)
1242                 goto out;
1243
1244         BQ27XXX_MSLEEP(1);
1245
1246         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1247         if (ret < 0)
1248                 goto out;
1249
1250         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1251         if (ret < 0)
1252                 goto out;
1253
1254         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1255                 ret = -EINVAL;
1256                 goto out;
1257         }
1258
1259         buf->has_data = true;
1260         buf->dirty = false;
1261
1262         return 0;
1263
1264 out:
1265         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1266         return ret;
1267 }
1268
1269 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1270                                             struct bq27xxx_dm_buf *buf,
1271                                             enum bq27xxx_dm_reg_id reg_id,
1272                                             unsigned int val)
1273 {
1274         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1275         const char *str = bq27xxx_dm_reg_name[reg_id];
1276         __be16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1277
1278         if (prev == NULL) {
1279                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1280                 return;
1281         }
1282
1283         if (reg->bytes != 2) {
1284                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1285                 return;
1286         }
1287
1288         if (!buf->has_data)
1289                 return;
1290
1291         if (be16_to_cpup(prev) == val) {
1292                 dev_info(di->dev, "%s has %u\n", str, val);
1293                 return;
1294         }
1295
1296 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1297         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1298 #else
1299         if (!(di->opts & BQ27XXX_O_RAM)) {
1300 #endif
1301                 /* devicetree and NVM differ; defer to NVM */
1302                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1303 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1304                          "by dt_monitored_battery_updates_nvm=0"
1305 #else
1306                          "for flash/NVM data memory"
1307 #endif
1308                          "\n", str, be16_to_cpup(prev), val);
1309                 return;
1310         }
1311
1312         dev_info(di->dev, "update %s to %u\n", str, val);
1313
1314         *prev = cpu_to_be16(val);
1315         buf->dirty = true;
1316 }
1317
1318 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1319 {
1320         const int limit = 100;
1321         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1322         int ret, try = limit;
1323
1324         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1325         if (ret < 0)
1326                 return ret;
1327
1328         do {
1329                 BQ27XXX_MSLEEP(25);
1330                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1331                 if (ret < 0)
1332                         return ret;
1333         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1334
1335         if (!try && di->chip != BQ27425) { // 425 has a bug
1336                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1337                 return -EINVAL;
1338         }
1339
1340         if (limit - try > 3)
1341                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1342
1343         return 0;
1344 }
1345
1346 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1347 {
1348         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1349         if (ret < 0 && ret != -EINVAL)
1350                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1351
1352         return ret;
1353 }
1354
1355 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1356 {
1357         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1358         if (ret < 0 && ret != -EINVAL)
1359                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1360
1361         return ret;
1362 }
1363
1364 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1365                                           struct bq27xxx_dm_buf *buf)
1366 {
1367         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1368         int ret;
1369
1370         if (!buf->dirty)
1371                 return 0;
1372
1373         if (cfgup) {
1374                 ret = bq27xxx_battery_set_cfgupdate(di);
1375                 if (ret < 0)
1376                         return ret;
1377         }
1378
1379         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1380         if (ret < 0)
1381                 goto out;
1382
1383         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1384         if (ret < 0)
1385                 goto out;
1386
1387         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1388         if (ret < 0)
1389                 goto out;
1390
1391         BQ27XXX_MSLEEP(1);
1392
1393         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1394         if (ret < 0)
1395                 goto out;
1396
1397         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1398                             bq27xxx_battery_checksum_dm_block(buf), true);
1399         if (ret < 0)
1400                 goto out;
1401
1402         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1403          * corruption on the '425 chip (and perhaps others), which can damage
1404          * the chip.
1405          */
1406
1407         if (cfgup) {
1408                 BQ27XXX_MSLEEP(1);
1409                 ret = bq27xxx_battery_soft_reset(di);
1410                 if (ret < 0)
1411                         return ret;
1412         } else {
1413                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1414         }
1415
1416         buf->dirty = false;
1417
1418         return 0;
1419
1420 out:
1421         if (cfgup)
1422                 bq27xxx_battery_soft_reset(di);
1423
1424         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1425         return ret;
1426 }
1427
1428 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1429                                        struct power_supply_battery_info *info)
1430 {
1431         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1432         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1433         bool updated;
1434
1435         if (bq27xxx_battery_unseal(di) < 0)
1436                 return;
1437
1438         if (info->charge_full_design_uah != -EINVAL &&
1439             info->energy_full_design_uwh != -EINVAL) {
1440                 bq27xxx_battery_read_dm_block(di, &bd);
1441                 /* assume design energy & capacity are in same block */
1442                 bq27xxx_battery_update_dm_block(di, &bd,
1443                                         BQ27XXX_DM_DESIGN_CAPACITY,
1444                                         info->charge_full_design_uah / 1000);
1445                 bq27xxx_battery_update_dm_block(di, &bd,
1446                                         BQ27XXX_DM_DESIGN_ENERGY,
1447                                         info->energy_full_design_uwh / 1000);
1448         }
1449
1450         if (info->voltage_min_design_uv != -EINVAL) {
1451                 bool same = bd.class == bt.class && bd.block == bt.block;
1452                 if (!same)
1453                         bq27xxx_battery_read_dm_block(di, &bt);
1454                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1455                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1456                                         info->voltage_min_design_uv / 1000);
1457         }
1458
1459         updated = bd.dirty || bt.dirty;
1460
1461         bq27xxx_battery_write_dm_block(di, &bd);
1462         bq27xxx_battery_write_dm_block(di, &bt);
1463
1464         bq27xxx_battery_seal(di);
1465
1466         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1467                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1468                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1469         }
1470         /* assume bq27xxx_battery_update() is called hereafter */
1471 }
1472
1473 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1474 {
1475         struct power_supply_battery_info *info;
1476         unsigned int min, max;
1477
1478         if (power_supply_get_battery_info(di->bat, &info) < 0)
1479                 return;
1480
1481         if (!di->dm_regs) {
1482                 dev_warn(di->dev, "data memory update not supported for chip\n");
1483                 return;
1484         }
1485
1486         if (info->energy_full_design_uwh != info->charge_full_design_uah) {
1487                 if (info->energy_full_design_uwh == -EINVAL)
1488                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1489                 else if (info->charge_full_design_uah == -EINVAL)
1490                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1491         }
1492
1493         /* assume min == 0 */
1494         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1495         if (info->energy_full_design_uwh > max * 1000) {
1496                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1497                         info->energy_full_design_uwh);
1498                 info->energy_full_design_uwh = -EINVAL;
1499         }
1500
1501         /* assume min == 0 */
1502         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1503         if (info->charge_full_design_uah > max * 1000) {
1504                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1505                         info->charge_full_design_uah);
1506                 info->charge_full_design_uah = -EINVAL;
1507         }
1508
1509         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1510         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1511         if ((info->voltage_min_design_uv < min * 1000 ||
1512              info->voltage_min_design_uv > max * 1000) &&
1513              info->voltage_min_design_uv != -EINVAL) {
1514                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1515                         info->voltage_min_design_uv);
1516                 info->voltage_min_design_uv = -EINVAL;
1517         }
1518
1519         if ((info->energy_full_design_uwh != -EINVAL &&
1520              info->charge_full_design_uah != -EINVAL) ||
1521              info->voltage_min_design_uv  != -EINVAL)
1522                 bq27xxx_battery_set_config(di, info);
1523 }
1524
1525 /*
1526  * Return the battery State-of-Charge
1527  * Or < 0 if something fails.
1528  */
1529 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1530 {
1531         int soc;
1532
1533         if (di->opts & BQ27XXX_O_SOC_SI)
1534                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1535         else
1536                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1537
1538         if (soc < 0)
1539                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1540
1541         return soc;
1542 }
1543
1544 /*
1545  * Return a battery charge value in µAh
1546  * Or < 0 if something fails.
1547  */
1548 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1549 {
1550         int charge;
1551
1552         charge = bq27xxx_read(di, reg, false);
1553         if (charge < 0) {
1554                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1555                         reg, charge);
1556                 return charge;
1557         }
1558
1559         if (di->opts & BQ27XXX_O_ZERO)
1560                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1561         else
1562                 charge *= 1000;
1563
1564         return charge;
1565 }
1566
1567 /*
1568  * Return the battery Nominal available capacity in µAh
1569  * Or < 0 if something fails.
1570  */
1571 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1572 {
1573         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1574 }
1575
1576 /*
1577  * Return the battery Remaining Capacity in µAh
1578  * Or < 0 if something fails.
1579  */
1580 static inline int bq27xxx_battery_read_rc(struct bq27xxx_device_info *di)
1581 {
1582         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_RC);
1583 }
1584
1585 /*
1586  * Return the battery Full Charge Capacity in µAh
1587  * Or < 0 if something fails.
1588  */
1589 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1590 {
1591         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1592 }
1593
1594 /*
1595  * Return the Design Capacity in µAh
1596  * Or < 0 if something fails.
1597  */
1598 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di,
1599                                      union power_supply_propval *val)
1600 {
1601         int dcap;
1602
1603         /* We only have to read charge design full once */
1604         if (di->charge_design_full > 0) {
1605                 val->intval = di->charge_design_full;
1606                 return 0;
1607         }
1608
1609         if (di->opts & BQ27XXX_O_ZERO)
1610                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1611         else
1612                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1613
1614         if (dcap < 0) {
1615                 dev_dbg(di->dev, "error reading design capacity\n");
1616                 return dcap;
1617         }
1618
1619         if (di->opts & BQ27XXX_O_ZERO)
1620                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1621         else
1622                 dcap *= 1000;
1623
1624         /* Save for later reads */
1625         di->charge_design_full = dcap;
1626
1627         val->intval = dcap;
1628
1629         return 0;
1630 }
1631
1632 /*
1633  * Return the battery Available energy in µWh
1634  * Or < 0 if something fails.
1635  */
1636 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1637 {
1638         int ae;
1639
1640         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1641         if (ae < 0) {
1642                 dev_dbg(di->dev, "error reading available energy\n");
1643                 return ae;
1644         }
1645
1646         if (di->opts & BQ27XXX_O_ZERO)
1647                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1648         else
1649                 ae *= 1000;
1650
1651         return ae;
1652 }
1653
1654 /*
1655  * Return the battery temperature in tenths of degree Kelvin
1656  * Or < 0 if something fails.
1657  */
1658 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1659 {
1660         int temp;
1661
1662         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1663         if (temp < 0) {
1664                 dev_err(di->dev, "error reading temperature\n");
1665                 return temp;
1666         }
1667
1668         if (di->opts & BQ27XXX_O_ZERO)
1669                 temp = 5 * temp / 2;
1670
1671         return temp;
1672 }
1673
1674 /*
1675  * Return the battery Cycle count total
1676  * Or < 0 if something fails.
1677  */
1678 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1679 {
1680         int cyct;
1681
1682         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1683         if (cyct < 0)
1684                 dev_err(di->dev, "error reading cycle count total\n");
1685
1686         return cyct;
1687 }
1688
1689 /*
1690  * Read a time register.
1691  * Return < 0 if something fails.
1692  */
1693 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1694 {
1695         int tval;
1696
1697         tval = bq27xxx_read(di, reg, false);
1698         if (tval < 0) {
1699                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1700                         reg, tval);
1701                 return tval;
1702         }
1703
1704         if (tval == 65535)
1705                 return -ENODATA;
1706
1707         return tval * 60;
1708 }
1709
1710 /*
1711  * Returns true if a battery over temperature condition is detected
1712  */
1713 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1714 {
1715         if (di->opts & BQ27XXX_O_OTDC)
1716                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1717         if (di->opts & BQ27XXX_O_UTOT)
1718                 return flags & BQ27XXX_FLAG_OT;
1719
1720         return false;
1721 }
1722
1723 /*
1724  * Returns true if a battery under temperature condition is detected
1725  */
1726 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1727 {
1728         if (di->opts & BQ27XXX_O_UTOT)
1729                 return flags & BQ27XXX_FLAG_UT;
1730
1731         return false;
1732 }
1733
1734 /*
1735  * Returns true if a low state of charge condition is detected
1736  */
1737 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1738 {
1739         if (di->opts & BQ27XXX_O_ZERO)
1740                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1741         else if (di->opts & BQ27Z561_O_BITS)
1742                 return flags & BQ27Z561_FLAG_FDC;
1743         else
1744                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1745 }
1746
1747 /*
1748  * Returns true if reported battery capacity is inaccurate
1749  */
1750 static bool bq27xxx_battery_capacity_inaccurate(struct bq27xxx_device_info *di,
1751                                                  u16 flags)
1752 {
1753         if (di->opts & BQ27XXX_O_HAS_CI)
1754                 return (flags & BQ27000_FLAG_CI);
1755         else
1756                 return false;
1757 }
1758
1759 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1760 {
1761         /* Unlikely but important to return first */
1762         if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
1763                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1764         if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
1765                 return POWER_SUPPLY_HEALTH_COLD;
1766         if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
1767                 return POWER_SUPPLY_HEALTH_DEAD;
1768         if (unlikely(bq27xxx_battery_capacity_inaccurate(di, di->cache.flags)))
1769                 return POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
1770
1771         return POWER_SUPPLY_HEALTH_GOOD;
1772 }
1773
1774 static bool bq27xxx_battery_is_full(struct bq27xxx_device_info *di, int flags)
1775 {
1776         if (di->opts & BQ27XXX_O_ZERO)
1777                 return (flags & BQ27000_FLAG_FC);
1778         else if (di->opts & BQ27Z561_O_BITS)
1779                 return (flags & BQ27Z561_FLAG_FC);
1780         else
1781                 return (flags & BQ27XXX_FLAG_FC);
1782 }
1783
1784 /*
1785  * Return the battery average current in µA and the status
1786  * Note that current can be negative signed as well
1787  * Or 0 if something fails.
1788  */
1789 static int bq27xxx_battery_current_and_status(
1790         struct bq27xxx_device_info *di,
1791         union power_supply_propval *val_curr,
1792         union power_supply_propval *val_status,
1793         struct bq27xxx_reg_cache *cache)
1794 {
1795         bool single_flags = (di->opts & BQ27XXX_O_ZERO);
1796         int curr;
1797         int flags;
1798
1799         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1800         if (curr < 0) {
1801                 dev_err(di->dev, "error reading current\n");
1802                 return curr;
1803         }
1804
1805         if (cache) {
1806                 flags = cache->flags;
1807         } else {
1808                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, single_flags);
1809                 if (flags < 0) {
1810                         dev_err(di->dev, "error reading flags\n");
1811                         return flags;
1812                 }
1813         }
1814
1815         if (di->opts & BQ27XXX_O_ZERO) {
1816                 if (!(flags & BQ27000_FLAG_CHGS)) {
1817                         dev_dbg(di->dev, "negative current!\n");
1818                         curr = -curr;
1819                 }
1820
1821                 curr = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1822         } else {
1823                 /* Other gauges return signed value */
1824                 curr = (int)((s16)curr) * 1000;
1825         }
1826
1827         if (val_curr)
1828                 val_curr->intval = curr;
1829
1830         if (val_status) {
1831                 if (bq27xxx_battery_is_full(di, flags))
1832                         val_status->intval = POWER_SUPPLY_STATUS_FULL;
1833                 else if (curr > 0)
1834                         val_status->intval = POWER_SUPPLY_STATUS_CHARGING;
1835                 else if (curr < 0)
1836                         val_status->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1837                 else
1838                         val_status->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1839         }
1840
1841         return 0;
1842 }
1843
1844 static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di)
1845 {
1846         union power_supply_propval status = di->last_status;
1847         struct bq27xxx_reg_cache cache = {0, };
1848         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1849
1850         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1851         if ((cache.flags & 0xff) == 0xff)
1852                 cache.flags = -1; /* read error */
1853         if (cache.flags >= 0) {
1854                 cache.temperature = bq27xxx_battery_read_temperature(di);
1855                 if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1856                         cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1857                 if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1858                         cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1859                 if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1860                         cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1861
1862                 cache.charge_full = bq27xxx_battery_read_fcc(di);
1863                 cache.capacity = bq27xxx_battery_read_soc(di);
1864                 if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1865                         cache.energy = bq27xxx_battery_read_energy(di);
1866                 di->cache.flags = cache.flags;
1867                 cache.health = bq27xxx_battery_read_health(di);
1868                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1869                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1870
1871                 /*
1872                  * On gauges with signed current reporting the current must be
1873                  * checked to detect charging <-> discharging status changes.
1874                  */
1875                 if (!(di->opts & BQ27XXX_O_ZERO))
1876                         bq27xxx_battery_current_and_status(di, NULL, &status, &cache);
1877         }
1878
1879         if ((di->cache.capacity != cache.capacity) ||
1880             (di->cache.flags != cache.flags) ||
1881             (di->last_status.intval != status.intval)) {
1882                 di->last_status.intval = status.intval;
1883                 power_supply_changed(di->bat);
1884         }
1885
1886         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1887                 di->cache = cache;
1888
1889         di->last_update = jiffies;
1890
1891         if (!di->removed && poll_interval > 0)
1892                 mod_delayed_work(system_wq, &di->work, poll_interval * HZ);
1893 }
1894
1895 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1896 {
1897         mutex_lock(&di->lock);
1898         bq27xxx_battery_update_unlocked(di);
1899         mutex_unlock(&di->lock);
1900 }
1901 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1902
1903 static void bq27xxx_battery_poll(struct work_struct *work)
1904 {
1905         struct bq27xxx_device_info *di =
1906                         container_of(work, struct bq27xxx_device_info,
1907                                      work.work);
1908
1909         bq27xxx_battery_update(di);
1910 }
1911
1912 /*
1913  * Get the average power in µW
1914  * Return < 0 if something fails.
1915  */
1916 static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
1917                                    union power_supply_propval *val)
1918 {
1919         int power;
1920
1921         power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1922         if (power < 0) {
1923                 dev_err(di->dev,
1924                         "error reading average power register %02x: %d\n",
1925                         BQ27XXX_REG_AP, power);
1926                 return power;
1927         }
1928
1929         if (di->opts & BQ27XXX_O_ZERO)
1930                 val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1931         else
1932                 /* Other gauges return a signed value in units of 10mW */
1933                 val->intval = (int)((s16)power) * 10000;
1934
1935         return 0;
1936 }
1937
1938 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1939                                           union power_supply_propval *val)
1940 {
1941         int level;
1942
1943         if (di->opts & BQ27XXX_O_ZERO) {
1944                 if (di->cache.flags & BQ27000_FLAG_FC)
1945                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1946                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1947                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1948                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1949                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1950                 else
1951                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1952         } else if (di->opts & BQ27Z561_O_BITS) {
1953                 if (di->cache.flags & BQ27Z561_FLAG_FC)
1954                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1955                 else if (di->cache.flags & BQ27Z561_FLAG_FDC)
1956                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1957                 else
1958                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1959         } else {
1960                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1961                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1962                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1963                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1964                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1965                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1966                 else
1967                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1968         }
1969
1970         val->intval = level;
1971
1972         return 0;
1973 }
1974
1975 /*
1976  * Return the battery Voltage in millivolts
1977  * Or < 0 if something fails.
1978  */
1979 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1980                                    union power_supply_propval *val)
1981 {
1982         int volt;
1983
1984         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1985         if (volt < 0) {
1986                 dev_err(di->dev, "error reading voltage\n");
1987                 return volt;
1988         }
1989
1990         val->intval = volt * 1000;
1991
1992         return 0;
1993 }
1994
1995 static int bq27xxx_simple_value(int value,
1996                                 union power_supply_propval *val)
1997 {
1998         if (value < 0)
1999                 return value;
2000
2001         val->intval = value;
2002
2003         return 0;
2004 }
2005
2006 static int bq27xxx_battery_get_property(struct power_supply *psy,
2007                                         enum power_supply_property psp,
2008                                         union power_supply_propval *val)
2009 {
2010         int ret = 0;
2011         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
2012
2013         mutex_lock(&di->lock);
2014         if (time_is_before_jiffies(di->last_update + 5 * HZ))
2015                 bq27xxx_battery_update_unlocked(di);
2016         mutex_unlock(&di->lock);
2017
2018         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
2019                 return -ENODEV;
2020
2021         switch (psp) {
2022         case POWER_SUPPLY_PROP_STATUS:
2023                 ret = bq27xxx_battery_current_and_status(di, NULL, val, NULL);
2024                 break;
2025         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2026                 ret = bq27xxx_battery_voltage(di, val);
2027                 break;
2028         case POWER_SUPPLY_PROP_PRESENT:
2029                 val->intval = di->cache.flags < 0 ? 0 : 1;
2030                 break;
2031         case POWER_SUPPLY_PROP_CURRENT_NOW:
2032                 ret = bq27xxx_battery_current_and_status(di, val, NULL, NULL);
2033                 break;
2034         case POWER_SUPPLY_PROP_CAPACITY:
2035                 ret = bq27xxx_simple_value(di->cache.capacity, val);
2036                 break;
2037         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
2038                 ret = bq27xxx_battery_capacity_level(di, val);
2039                 break;
2040         case POWER_SUPPLY_PROP_TEMP:
2041                 ret = bq27xxx_simple_value(di->cache.temperature, val);
2042                 if (ret == 0)
2043                         val->intval -= 2731; /* convert decidegree k to c */
2044                 break;
2045         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
2046                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
2047                 break;
2048         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
2049                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
2050                 break;
2051         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
2052                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
2053                 break;
2054         case POWER_SUPPLY_PROP_TECHNOLOGY:
2055                 if (di->opts & BQ27XXX_O_MUL_CHEM)
2056                         val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
2057                 else
2058                         val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
2059                 break;
2060         case POWER_SUPPLY_PROP_CHARGE_NOW:
2061                 if (di->regs[BQ27XXX_REG_NAC] != INVALID_REG_ADDR)
2062                         ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
2063                 else
2064                         ret = bq27xxx_simple_value(bq27xxx_battery_read_rc(di), val);
2065                 break;
2066         case POWER_SUPPLY_PROP_CHARGE_FULL:
2067                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
2068                 break;
2069         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
2070                 ret = bq27xxx_battery_read_dcap(di, val);
2071                 break;
2072         /*
2073          * TODO: Implement these to make registers set from
2074          * power_supply_battery_info visible in sysfs.
2075          */
2076         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
2077         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
2078                 return -EINVAL;
2079         case POWER_SUPPLY_PROP_CYCLE_COUNT:
2080                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
2081                 break;
2082         case POWER_SUPPLY_PROP_ENERGY_NOW:
2083                 ret = bq27xxx_simple_value(di->cache.energy, val);
2084                 break;
2085         case POWER_SUPPLY_PROP_POWER_AVG:
2086                 ret = bq27xxx_battery_pwr_avg(di, val);
2087                 break;
2088         case POWER_SUPPLY_PROP_HEALTH:
2089                 ret = bq27xxx_simple_value(di->cache.health, val);
2090                 break;
2091         case POWER_SUPPLY_PROP_MANUFACTURER:
2092                 val->strval = BQ27XXX_MANUFACTURER;
2093                 break;
2094         default:
2095                 return -EINVAL;
2096         }
2097
2098         return ret;
2099 }
2100
2101 static void bq27xxx_external_power_changed(struct power_supply *psy)
2102 {
2103         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
2104
2105         /* After charger plug in/out wait 0.5s for things to stabilize */
2106         mod_delayed_work(system_wq, &di->work, HZ / 2);
2107 }
2108
2109 static void bq27xxx_battery_mutex_destroy(void *data)
2110 {
2111         struct mutex *lock = data;
2112
2113         mutex_destroy(lock);
2114 }
2115
2116 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
2117 {
2118         struct power_supply_desc *psy_desc;
2119         struct power_supply_config psy_cfg = {
2120                 .of_node = di->dev->of_node,
2121                 .drv_data = di,
2122         };
2123         int ret;
2124
2125         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
2126         mutex_init(&di->lock);
2127         ret = devm_add_action_or_reset(di->dev, bq27xxx_battery_mutex_destroy,
2128                                        &di->lock);
2129         if (ret)
2130                 return ret;
2131
2132         di->regs       = bq27xxx_chip_data[di->chip].regs;
2133         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
2134         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
2135         di->opts       = bq27xxx_chip_data[di->chip].opts;
2136
2137         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
2138         if (!psy_desc)
2139                 return -ENOMEM;
2140
2141         psy_desc->name = di->name;
2142         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
2143         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
2144         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
2145         psy_desc->get_property = bq27xxx_battery_get_property;
2146         psy_desc->external_power_changed = bq27xxx_external_power_changed;
2147
2148         di->bat = devm_power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
2149         if (IS_ERR(di->bat))
2150                 return dev_err_probe(di->dev, PTR_ERR(di->bat),
2151                                      "failed to register battery\n");
2152
2153         bq27xxx_battery_settings(di);
2154         bq27xxx_battery_update(di);
2155
2156         mutex_lock(&bq27xxx_list_lock);
2157         list_add(&di->list, &bq27xxx_battery_devices);
2158         mutex_unlock(&bq27xxx_list_lock);
2159
2160         return 0;
2161 }
2162 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
2163
2164 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
2165 {
2166         mutex_lock(&bq27xxx_list_lock);
2167         list_del(&di->list);
2168         mutex_unlock(&bq27xxx_list_lock);
2169
2170         /* Set removed to avoid bq27xxx_battery_update() re-queuing the work */
2171         mutex_lock(&di->lock);
2172         di->removed = true;
2173         mutex_unlock(&di->lock);
2174
2175         cancel_delayed_work_sync(&di->work);
2176 }
2177 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
2178
2179 #ifdef CONFIG_PM_SLEEP
2180 static int bq27xxx_battery_suspend(struct device *dev)
2181 {
2182         struct bq27xxx_device_info *di = dev_get_drvdata(dev);
2183
2184         cancel_delayed_work(&di->work);
2185         return 0;
2186 }
2187
2188 static int bq27xxx_battery_resume(struct device *dev)
2189 {
2190         struct bq27xxx_device_info *di = dev_get_drvdata(dev);
2191
2192         schedule_delayed_work(&di->work, 0);
2193         return 0;
2194 }
2195 #endif /* CONFIG_PM_SLEEP */
2196
2197 SIMPLE_DEV_PM_OPS(bq27xxx_battery_battery_pm_ops,
2198                   bq27xxx_battery_suspend, bq27xxx_battery_resume);
2199 EXPORT_SYMBOL_GPL(bq27xxx_battery_battery_pm_ops);
2200
2201 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
2202 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
2203 MODULE_LICENSE("GPL");