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  */
  43
  44 #include <linux/device.h>
  45 #include <linux/module.h>
  46 #include <linux/mutex.h>
  47 #include <linux/param.h>
  48 #include <linux/jiffies.h>
  49 #include <linux/workqueue.h>
  50 #include <linux/delay.h>
  51 #include <linux/platform_device.h>
  52 #include <linux/power_supply.h>
  53 #include <linux/slab.h>
  54 #include <linux/of.h>
  55
  56 #include <linux/power/bq27xxx_battery.h>
  57
  58 #define BQ27XXX_MANUFACTURER    "Texas Instruments"
  59
  60 /* BQ27XXX Flags */
  61 #define BQ27XXX_FLAG_DSC        BIT(0)
  62 #define BQ27XXX_FLAG_SOCF       BIT(1) /* State-of-Charge threshold final */
  63 #define BQ27XXX_FLAG_SOC1       BIT(2) /* State-of-Charge threshold 1 */
  64 #define BQ27XXX_FLAG_CFGUP      BIT(4)
  65 #define BQ27XXX_FLAG_FC         BIT(9)
  66 #define BQ27XXX_FLAG_OTD        BIT(14)
  67 #define BQ27XXX_FLAG_OTC        BIT(15)
  68 #define BQ27XXX_FLAG_UT         BIT(14)
  69 #define BQ27XXX_FLAG_OT         BIT(15)
  70
  71 /* BQ27000 has different layout for Flags register */
  72 #define BQ27000_FLAG_EDVF       BIT(0) /* Final End-of-Discharge-Voltage flag */
  73 #define BQ27000_FLAG_EDV1       BIT(1) /* First End-of-Discharge-Voltage flag */
  74 #define BQ27000_FLAG_CI         BIT(4) /* Capacity Inaccurate flag */
  75 #define BQ27000_FLAG_FC         BIT(5)
  76 #define BQ27000_FLAG_CHGS       BIT(7) /* Charge state flag */
  77
  78 /* BQ27Z561 has different layout for Flags register */
  79 #define BQ27Z561_FLAG_FDC       BIT(4) /* Battery fully discharged */
  80 #define BQ27Z561_FLAG_FC        BIT(5) /* Battery fully charged */
  81 #define BQ27Z561_FLAG_DIS_CH    BIT(6) /* Battery is discharging */
  82
  83 /* control register params */
  84 #define BQ27XXX_SEALED                  0x20
  85 #define BQ27XXX_SET_CFGUPDATE           0x13
  86 #define BQ27XXX_SOFT_RESET              0x42
  87 #define BQ27XXX_RESET                   0x41
  88
  89 #define BQ27XXX_RS                      (20) /* Resistor sense mOhm */
  90 #define BQ27XXX_POWER_CONSTANT          (29200) /* 29.2 µV^2 * 1000 */
  91 #define BQ27XXX_CURRENT_CONSTANT        (3570) /* 3.57 µV * 1000 */
  92
  93 #define INVALID_REG_ADDR        0xff
  94
  95 /*
  96  * bq27xxx_reg_index - Register names
  97  *
  98  * These are indexes into a device's register mapping array.
  99  */
 100
 101 enum bq27xxx_reg_index {
 102         BQ27XXX_REG_CTRL = 0,   /* Control */
 103         BQ27XXX_REG_TEMP,       /* Temperature */
 104         BQ27XXX_REG_INT_TEMP,   /* Internal Temperature */
 105         BQ27XXX_REG_VOLT,       /* Voltage */
 106         BQ27XXX_REG_AI,         /* Average Current */
 107         BQ27XXX_REG_FLAGS,      /* Flags */
 108         BQ27XXX_REG_TTE,        /* Time-to-Empty */
 109         BQ27XXX_REG_TTF,        /* Time-to-Full */
 110         BQ27XXX_REG_TTES,       /* Time-to-Empty Standby */
 111         BQ27XXX_REG_TTECP,      /* Time-to-Empty at Constant Power */
 112         BQ27XXX_REG_NAC,        /* Nominal Available Capacity */
 113         BQ27XXX_REG_FCC,        /* Full Charge Capacity */
 114         BQ27XXX_REG_CYCT,       /* Cycle Count */
 115         BQ27XXX_REG_AE,         /* Available Energy */
 116         BQ27XXX_REG_SOC,        /* State-of-Charge */
 117         BQ27XXX_REG_DCAP,       /* Design Capacity */
 118         BQ27XXX_REG_AP,         /* Average Power */
 119         BQ27XXX_DM_CTRL,        /* Block Data Control */
 120         BQ27XXX_DM_CLASS,       /* Data Class */
 121         BQ27XXX_DM_BLOCK,       /* Data Block */
 122         BQ27XXX_DM_DATA,        /* Block Data */
 123         BQ27XXX_DM_CKSUM,       /* Block Data Checksum */
 124         BQ27XXX_REG_MAX,        /* sentinel */
 125 };
 126
 127 #define BQ27XXX_DM_REG_ROWS \
 128         [BQ27XXX_DM_CTRL] = 0x61,  \
 129         [BQ27XXX_DM_CLASS] = 0x3e, \
 130         [BQ27XXX_DM_BLOCK] = 0x3f, \
 131         [BQ27XXX_DM_DATA] = 0x40,  \
 132         [BQ27XXX_DM_CKSUM] = 0x60
 133
 134 /* Register mappings */
 135 static u8
 136         bq27000_regs[BQ27XXX_REG_MAX] = {
 137                 [BQ27XXX_REG_CTRL] = 0x00,
 138                 [BQ27XXX_REG_TEMP] = 0x06,
 139                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 140                 [BQ27XXX_REG_VOLT] = 0x08,
 141                 [BQ27XXX_REG_AI] = 0x14,
 142                 [BQ27XXX_REG_FLAGS] = 0x0a,
 143                 [BQ27XXX_REG_TTE] = 0x16,
 144                 [BQ27XXX_REG_TTF] = 0x18,
 145                 [BQ27XXX_REG_TTES] = 0x1c,
 146                 [BQ27XXX_REG_TTECP] = 0x26,
 147                 [BQ27XXX_REG_NAC] = 0x0c,
 148                 [BQ27XXX_REG_FCC] = 0x12,
 149                 [BQ27XXX_REG_CYCT] = 0x2a,
 150                 [BQ27XXX_REG_AE] = 0x22,
 151                 [BQ27XXX_REG_SOC] = 0x0b,
 152                 [BQ27XXX_REG_DCAP] = 0x76,
 153                 [BQ27XXX_REG_AP] = 0x24,
 154                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 155                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 156                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 157                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 158                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 159         },
 160         bq27010_regs[BQ27XXX_REG_MAX] = {
 161                 [BQ27XXX_REG_CTRL] = 0x00,
 162                 [BQ27XXX_REG_TEMP] = 0x06,
 163                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 164                 [BQ27XXX_REG_VOLT] = 0x08,
 165                 [BQ27XXX_REG_AI] = 0x14,
 166                 [BQ27XXX_REG_FLAGS] = 0x0a,
 167                 [BQ27XXX_REG_TTE] = 0x16,
 168                 [BQ27XXX_REG_TTF] = 0x18,
 169                 [BQ27XXX_REG_TTES] = 0x1c,
 170                 [BQ27XXX_REG_TTECP] = 0x26,
 171                 [BQ27XXX_REG_NAC] = 0x0c,
 172                 [BQ27XXX_REG_FCC] = 0x12,
 173                 [BQ27XXX_REG_CYCT] = 0x2a,
 174                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 175                 [BQ27XXX_REG_SOC] = 0x0b,
 176                 [BQ27XXX_REG_DCAP] = 0x76,
 177                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 178                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 179                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 180                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 181                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 182                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 183         },
 184         bq2750x_regs[BQ27XXX_REG_MAX] = {
 185                 [BQ27XXX_REG_CTRL] = 0x00,
 186                 [BQ27XXX_REG_TEMP] = 0x06,
 187                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 188                 [BQ27XXX_REG_VOLT] = 0x08,
 189                 [BQ27XXX_REG_AI] = 0x14,
 190                 [BQ27XXX_REG_FLAGS] = 0x0a,
 191                 [BQ27XXX_REG_TTE] = 0x16,
 192                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 193                 [BQ27XXX_REG_TTES] = 0x1a,
 194                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 195                 [BQ27XXX_REG_NAC] = 0x0c,
 196                 [BQ27XXX_REG_FCC] = 0x12,
 197                 [BQ27XXX_REG_CYCT] = 0x2a,
 198                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 199                 [BQ27XXX_REG_SOC] = 0x2c,
 200                 [BQ27XXX_REG_DCAP] = 0x3c,
 201                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 202                 BQ27XXX_DM_REG_ROWS,
 203         },
 204 #define bq2751x_regs bq27510g3_regs
 205 #define bq2752x_regs bq27510g3_regs
 206         bq27500_regs[BQ27XXX_REG_MAX] = {
 207                 [BQ27XXX_REG_CTRL] = 0x00,
 208                 [BQ27XXX_REG_TEMP] = 0x06,
 209                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 210                 [BQ27XXX_REG_VOLT] = 0x08,
 211                 [BQ27XXX_REG_AI] = 0x14,
 212                 [BQ27XXX_REG_FLAGS] = 0x0a,
 213                 [BQ27XXX_REG_TTE] = 0x16,
 214                 [BQ27XXX_REG_TTF] = 0x18,
 215                 [BQ27XXX_REG_TTES] = 0x1c,
 216                 [BQ27XXX_REG_TTECP] = 0x26,
 217                 [BQ27XXX_REG_NAC] = 0x0c,
 218                 [BQ27XXX_REG_FCC] = 0x12,
 219                 [BQ27XXX_REG_CYCT] = 0x2a,
 220                 [BQ27XXX_REG_AE] = 0x22,
 221                 [BQ27XXX_REG_SOC] = 0x2c,
 222                 [BQ27XXX_REG_DCAP] = 0x3c,
 223                 [BQ27XXX_REG_AP] = 0x24,
 224                 BQ27XXX_DM_REG_ROWS,
 225         },
 226 #define bq27510g1_regs bq27500_regs
 227 #define bq27510g2_regs bq27500_regs
 228         bq27510g3_regs[BQ27XXX_REG_MAX] = {
 229                 [BQ27XXX_REG_CTRL] = 0x00,
 230                 [BQ27XXX_REG_TEMP] = 0x06,
 231                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 232                 [BQ27XXX_REG_VOLT] = 0x08,
 233                 [BQ27XXX_REG_AI] = 0x14,
 234                 [BQ27XXX_REG_FLAGS] = 0x0a,
 235                 [BQ27XXX_REG_TTE] = 0x16,
 236                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 237                 [BQ27XXX_REG_TTES] = 0x1a,
 238                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 239                 [BQ27XXX_REG_NAC] = 0x0c,
 240                 [BQ27XXX_REG_FCC] = 0x12,
 241                 [BQ27XXX_REG_CYCT] = 0x1e,
 242                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 243                 [BQ27XXX_REG_SOC] = 0x20,
 244                 [BQ27XXX_REG_DCAP] = 0x2e,
 245                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 246                 BQ27XXX_DM_REG_ROWS,
 247         },
 248         bq27520g1_regs[BQ27XXX_REG_MAX] = {
 249                 [BQ27XXX_REG_CTRL] = 0x00,
 250                 [BQ27XXX_REG_TEMP] = 0x06,
 251                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 252                 [BQ27XXX_REG_VOLT] = 0x08,
 253                 [BQ27XXX_REG_AI] = 0x14,
 254                 [BQ27XXX_REG_FLAGS] = 0x0a,
 255                 [BQ27XXX_REG_TTE] = 0x16,
 256                 [BQ27XXX_REG_TTF] = 0x18,
 257                 [BQ27XXX_REG_TTES] = 0x1c,
 258                 [BQ27XXX_REG_TTECP] = 0x26,
 259                 [BQ27XXX_REG_NAC] = 0x0c,
 260                 [BQ27XXX_REG_FCC] = 0x12,
 261                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 262                 [BQ27XXX_REG_AE] = 0x22,
 263                 [BQ27XXX_REG_SOC] = 0x2c,
 264                 [BQ27XXX_REG_DCAP] = 0x3c,
 265                 [BQ27XXX_REG_AP] = 0x24,
 266                 BQ27XXX_DM_REG_ROWS,
 267         },
 268         bq27520g2_regs[BQ27XXX_REG_MAX] = {
 269                 [BQ27XXX_REG_CTRL] = 0x00,
 270                 [BQ27XXX_REG_TEMP] = 0x06,
 271                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 272                 [BQ27XXX_REG_VOLT] = 0x08,
 273                 [BQ27XXX_REG_AI] = 0x14,
 274                 [BQ27XXX_REG_FLAGS] = 0x0a,
 275                 [BQ27XXX_REG_TTE] = 0x16,
 276                 [BQ27XXX_REG_TTF] = 0x18,
 277                 [BQ27XXX_REG_TTES] = 0x1c,
 278                 [BQ27XXX_REG_TTECP] = 0x26,
 279                 [BQ27XXX_REG_NAC] = 0x0c,
 280                 [BQ27XXX_REG_FCC] = 0x12,
 281                 [BQ27XXX_REG_CYCT] = 0x2a,
 282                 [BQ27XXX_REG_AE] = 0x22,
 283                 [BQ27XXX_REG_SOC] = 0x2c,
 284                 [BQ27XXX_REG_DCAP] = 0x3c,
 285                 [BQ27XXX_REG_AP] = 0x24,
 286                 BQ27XXX_DM_REG_ROWS,
 287         },
 288         bq27520g3_regs[BQ27XXX_REG_MAX] = {
 289                 [BQ27XXX_REG_CTRL] = 0x00,
 290                 [BQ27XXX_REG_TEMP] = 0x06,
 291                 [BQ27XXX_REG_INT_TEMP] = 0x36,
 292                 [BQ27XXX_REG_VOLT] = 0x08,
 293                 [BQ27XXX_REG_AI] = 0x14,
 294                 [BQ27XXX_REG_FLAGS] = 0x0a,
 295                 [BQ27XXX_REG_TTE] = 0x16,
 296                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 297                 [BQ27XXX_REG_TTES] = 0x1c,
 298                 [BQ27XXX_REG_TTECP] = 0x26,
 299                 [BQ27XXX_REG_NAC] = 0x0c,
 300                 [BQ27XXX_REG_FCC] = 0x12,
 301                 [BQ27XXX_REG_CYCT] = 0x2a,
 302                 [BQ27XXX_REG_AE] = 0x22,
 303                 [BQ27XXX_REG_SOC] = 0x2c,
 304                 [BQ27XXX_REG_DCAP] = 0x3c,
 305                 [BQ27XXX_REG_AP] = 0x24,
 306                 BQ27XXX_DM_REG_ROWS,
 307         },
 308         bq27520g4_regs[BQ27XXX_REG_MAX] = {
 309                 [BQ27XXX_REG_CTRL] = 0x00,
 310                 [BQ27XXX_REG_TEMP] = 0x06,
 311                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 312                 [BQ27XXX_REG_VOLT] = 0x08,
 313                 [BQ27XXX_REG_AI] = 0x14,
 314                 [BQ27XXX_REG_FLAGS] = 0x0a,
 315                 [BQ27XXX_REG_TTE] = 0x16,
 316                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 317                 [BQ27XXX_REG_TTES] = 0x1c,
 318                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 319                 [BQ27XXX_REG_NAC] = 0x0c,
 320                 [BQ27XXX_REG_FCC] = 0x12,
 321                 [BQ27XXX_REG_CYCT] = 0x1e,
 322                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 323                 [BQ27XXX_REG_SOC] = 0x20,
 324                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 325                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 326                 BQ27XXX_DM_REG_ROWS,
 327         },
 328         bq27521_regs[BQ27XXX_REG_MAX] = {
 329                 [BQ27XXX_REG_CTRL] = 0x02,
 330                 [BQ27XXX_REG_TEMP] = 0x0a,
 331                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 332                 [BQ27XXX_REG_VOLT] = 0x0c,
 333                 [BQ27XXX_REG_AI] = 0x0e,
 334                 [BQ27XXX_REG_FLAGS] = 0x08,
 335                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 336                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 337                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 338                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 339                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 340                 [BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
 341                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 342                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 343                 [BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
 344                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 345                 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 346                 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
 347                 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
 348                 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
 349                 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
 350                 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
 351         },
 352         bq27530_regs[BQ27XXX_REG_MAX] = {
 353                 [BQ27XXX_REG_CTRL] = 0x00,
 354                 [BQ27XXX_REG_TEMP] = 0x06,
 355                 [BQ27XXX_REG_INT_TEMP] = 0x32,
 356                 [BQ27XXX_REG_VOLT] = 0x08,
 357                 [BQ27XXX_REG_AI] = 0x14,
 358                 [BQ27XXX_REG_FLAGS] = 0x0a,
 359                 [BQ27XXX_REG_TTE] = 0x16,
 360                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 361                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 362                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 363                 [BQ27XXX_REG_NAC] = 0x0c,
 364                 [BQ27XXX_REG_FCC] = 0x12,
 365                 [BQ27XXX_REG_CYCT] = 0x2a,
 366                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 367                 [BQ27XXX_REG_SOC] = 0x2c,
 368                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 369                 [BQ27XXX_REG_AP] = 0x24,
 370                 BQ27XXX_DM_REG_ROWS,
 371         },
 372 #define bq27531_regs bq27530_regs
 373         bq27541_regs[BQ27XXX_REG_MAX] = {
 374                 [BQ27XXX_REG_CTRL] = 0x00,
 375                 [BQ27XXX_REG_TEMP] = 0x06,
 376                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 377                 [BQ27XXX_REG_VOLT] = 0x08,
 378                 [BQ27XXX_REG_AI] = 0x14,
 379                 [BQ27XXX_REG_FLAGS] = 0x0a,
 380                 [BQ27XXX_REG_TTE] = 0x16,
 381                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 382                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 383                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 384                 [BQ27XXX_REG_NAC] = 0x0c,
 385                 [BQ27XXX_REG_FCC] = 0x12,
 386                 [BQ27XXX_REG_CYCT] = 0x2a,
 387                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 388                 [BQ27XXX_REG_SOC] = 0x2c,
 389                 [BQ27XXX_REG_DCAP] = 0x3c,
 390                 [BQ27XXX_REG_AP] = 0x24,
 391                 BQ27XXX_DM_REG_ROWS,
 392         },
 393 #define bq27542_regs bq27541_regs
 394 #define bq27546_regs bq27541_regs
 395 #define bq27742_regs bq27541_regs
 396         bq27545_regs[BQ27XXX_REG_MAX] = {
 397                 [BQ27XXX_REG_CTRL] = 0x00,
 398                 [BQ27XXX_REG_TEMP] = 0x06,
 399                 [BQ27XXX_REG_INT_TEMP] = 0x28,
 400                 [BQ27XXX_REG_VOLT] = 0x08,
 401                 [BQ27XXX_REG_AI] = 0x14,
 402                 [BQ27XXX_REG_FLAGS] = 0x0a,
 403                 [BQ27XXX_REG_TTE] = 0x16,
 404                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 405                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 406                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 407                 [BQ27XXX_REG_NAC] = 0x0c,
 408                 [BQ27XXX_REG_FCC] = 0x12,
 409                 [BQ27XXX_REG_CYCT] = 0x2a,
 410                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 411                 [BQ27XXX_REG_SOC] = 0x2c,
 412                 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
 413                 [BQ27XXX_REG_AP] = 0x24,
 414                 BQ27XXX_DM_REG_ROWS,
 415         },
 416         bq27421_regs[BQ27XXX_REG_MAX] = {
 417                 [BQ27XXX_REG_CTRL] = 0x00,
 418                 [BQ27XXX_REG_TEMP] = 0x02,
 419                 [BQ27XXX_REG_INT_TEMP] = 0x1e,
 420                 [BQ27XXX_REG_VOLT] = 0x04,
 421                 [BQ27XXX_REG_AI] = 0x10,
 422                 [BQ27XXX_REG_FLAGS] = 0x06,
 423                 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
 424                 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
 425                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 426                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 427                 [BQ27XXX_REG_NAC] = 0x08,
 428                 [BQ27XXX_REG_FCC] = 0x0e,
 429                 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
 430                 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
 431                 [BQ27XXX_REG_SOC] = 0x1c,
 432                 [BQ27XXX_REG_DCAP] = 0x3c,
 433                 [BQ27XXX_REG_AP] = 0x18,
 434                 BQ27XXX_DM_REG_ROWS,
 435         },
 436 #define bq27411_regs bq27421_regs
 437 #define bq27425_regs bq27421_regs
 438 #define bq27426_regs bq27421_regs
 439 #define bq27441_regs bq27421_regs
 440 #define bq27621_regs bq27421_regs
 441         bq27z561_regs[BQ27XXX_REG_MAX] = {
 442                 [BQ27XXX_REG_CTRL] = 0x00,
 443                 [BQ27XXX_REG_TEMP] = 0x06,
 444                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 445                 [BQ27XXX_REG_VOLT] = 0x08,
 446                 [BQ27XXX_REG_AI] = 0x14,
 447                 [BQ27XXX_REG_FLAGS] = 0x0a,
 448                 [BQ27XXX_REG_TTE] = 0x16,
 449                 [BQ27XXX_REG_TTF] = 0x18,
 450                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 451                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 452                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 453                 [BQ27XXX_REG_FCC] = 0x12,
 454                 [BQ27XXX_REG_CYCT] = 0x2a,
 455                 [BQ27XXX_REG_AE] = 0x22,
 456                 [BQ27XXX_REG_SOC] = 0x2c,
 457                 [BQ27XXX_REG_DCAP] = 0x3c,
 458                 [BQ27XXX_REG_AP] = 0x22,
 459                 BQ27XXX_DM_REG_ROWS,
 460         },
 461         bq28z610_regs[BQ27XXX_REG_MAX] = {
 462                 [BQ27XXX_REG_CTRL] = 0x00,
 463                 [BQ27XXX_REG_TEMP] = 0x06,
 464                 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
 465                 [BQ27XXX_REG_VOLT] = 0x08,
 466                 [BQ27XXX_REG_AI] = 0x14,
 467                 [BQ27XXX_REG_FLAGS] = 0x0a,
 468                 [BQ27XXX_REG_TTE] = 0x16,
 469                 [BQ27XXX_REG_TTF] = 0x18,
 470                 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
 471                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 472                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 473                 [BQ27XXX_REG_FCC] = 0x12,
 474                 [BQ27XXX_REG_CYCT] = 0x2a,
 475                 [BQ27XXX_REG_AE] = 0x22,
 476                 [BQ27XXX_REG_SOC] = 0x2c,
 477                 [BQ27XXX_REG_DCAP] = 0x3c,
 478                 [BQ27XXX_REG_AP] = 0x22,
 479                 BQ27XXX_DM_REG_ROWS,
 480         },
 481         bq34z100_regs[BQ27XXX_REG_MAX] = {
 482                 [BQ27XXX_REG_CTRL] = 0x00,
 483                 [BQ27XXX_REG_TEMP] = 0x0c,
 484                 [BQ27XXX_REG_INT_TEMP] = 0x2a,
 485                 [BQ27XXX_REG_VOLT] = 0x08,
 486                 [BQ27XXX_REG_AI] = 0x0a,
 487                 [BQ27XXX_REG_FLAGS] = 0x0e,
 488                 [BQ27XXX_REG_TTE] = 0x18,
 489                 [BQ27XXX_REG_TTF] = 0x1a,
 490                 [BQ27XXX_REG_TTES] = 0x1e,
 491                 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
 492                 [BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
 493                 [BQ27XXX_REG_FCC] = 0x06,
 494                 [BQ27XXX_REG_CYCT] = 0x2c,
 495                 [BQ27XXX_REG_AE] = 0x24,
 496                 [BQ27XXX_REG_SOC] = 0x02,
 497                 [BQ27XXX_REG_DCAP] = 0x3c,
 498                 [BQ27XXX_REG_AP] = 0x22,
 499                 BQ27XXX_DM_REG_ROWS,
 500         };
 501
 502 static enum power_supply_property bq27000_props[] = {
 503         POWER_SUPPLY_PROP_STATUS,
 504         POWER_SUPPLY_PROP_PRESENT,
 505         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 506         POWER_SUPPLY_PROP_CURRENT_NOW,
 507         POWER_SUPPLY_PROP_CAPACITY,
 508         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 509         POWER_SUPPLY_PROP_TEMP,
 510         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 511         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 512         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 513         POWER_SUPPLY_PROP_TECHNOLOGY,
 514         POWER_SUPPLY_PROP_CHARGE_FULL,
 515         POWER_SUPPLY_PROP_CHARGE_NOW,
 516         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 517         POWER_SUPPLY_PROP_CYCLE_COUNT,
 518         POWER_SUPPLY_PROP_ENERGY_NOW,
 519         POWER_SUPPLY_PROP_POWER_AVG,
 520         POWER_SUPPLY_PROP_HEALTH,
 521         POWER_SUPPLY_PROP_MANUFACTURER,
 522 };
 523
 524 static enum power_supply_property bq27010_props[] = {
 525         POWER_SUPPLY_PROP_STATUS,
 526         POWER_SUPPLY_PROP_PRESENT,
 527         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 528         POWER_SUPPLY_PROP_CURRENT_NOW,
 529         POWER_SUPPLY_PROP_CAPACITY,
 530         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 531         POWER_SUPPLY_PROP_TEMP,
 532         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 533         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 534         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 535         POWER_SUPPLY_PROP_TECHNOLOGY,
 536         POWER_SUPPLY_PROP_CHARGE_FULL,
 537         POWER_SUPPLY_PROP_CHARGE_NOW,
 538         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 539         POWER_SUPPLY_PROP_CYCLE_COUNT,
 540         POWER_SUPPLY_PROP_HEALTH,
 541         POWER_SUPPLY_PROP_MANUFACTURER,
 542 };
 543
 544 #define bq2750x_props bq27510g3_props
 545 #define bq2751x_props bq27510g3_props
 546 #define bq2752x_props bq27510g3_props
 547
 548 static enum power_supply_property bq27500_props[] = {
 549         POWER_SUPPLY_PROP_STATUS,
 550         POWER_SUPPLY_PROP_PRESENT,
 551         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 552         POWER_SUPPLY_PROP_CURRENT_NOW,
 553         POWER_SUPPLY_PROP_CAPACITY,
 554         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 555         POWER_SUPPLY_PROP_TEMP,
 556         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 557         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 558         POWER_SUPPLY_PROP_TECHNOLOGY,
 559         POWER_SUPPLY_PROP_CHARGE_FULL,
 560         POWER_SUPPLY_PROP_CHARGE_NOW,
 561         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 562         POWER_SUPPLY_PROP_CYCLE_COUNT,
 563         POWER_SUPPLY_PROP_ENERGY_NOW,
 564         POWER_SUPPLY_PROP_POWER_AVG,
 565         POWER_SUPPLY_PROP_HEALTH,
 566         POWER_SUPPLY_PROP_MANUFACTURER,
 567 };
 568 #define bq27510g1_props bq27500_props
 569 #define bq27510g2_props bq27500_props
 570
 571 static enum power_supply_property bq27510g3_props[] = {
 572         POWER_SUPPLY_PROP_STATUS,
 573         POWER_SUPPLY_PROP_PRESENT,
 574         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 575         POWER_SUPPLY_PROP_CURRENT_NOW,
 576         POWER_SUPPLY_PROP_CAPACITY,
 577         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 578         POWER_SUPPLY_PROP_TEMP,
 579         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 580         POWER_SUPPLY_PROP_TECHNOLOGY,
 581         POWER_SUPPLY_PROP_CHARGE_FULL,
 582         POWER_SUPPLY_PROP_CHARGE_NOW,
 583         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 584         POWER_SUPPLY_PROP_CYCLE_COUNT,
 585         POWER_SUPPLY_PROP_HEALTH,
 586         POWER_SUPPLY_PROP_MANUFACTURER,
 587 };
 588
 589 static enum power_supply_property bq27520g1_props[] = {
 590         POWER_SUPPLY_PROP_STATUS,
 591         POWER_SUPPLY_PROP_PRESENT,
 592         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 593         POWER_SUPPLY_PROP_CURRENT_NOW,
 594         POWER_SUPPLY_PROP_CAPACITY,
 595         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 596         POWER_SUPPLY_PROP_TEMP,
 597         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 598         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 599         POWER_SUPPLY_PROP_TECHNOLOGY,
 600         POWER_SUPPLY_PROP_CHARGE_FULL,
 601         POWER_SUPPLY_PROP_CHARGE_NOW,
 602         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 603         POWER_SUPPLY_PROP_ENERGY_NOW,
 604         POWER_SUPPLY_PROP_POWER_AVG,
 605         POWER_SUPPLY_PROP_HEALTH,
 606         POWER_SUPPLY_PROP_MANUFACTURER,
 607 };
 608
 609 #define bq27520g2_props bq27500_props
 610
 611 static enum power_supply_property bq27520g3_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_ENERGY_NOW,
 626         POWER_SUPPLY_PROP_POWER_AVG,
 627         POWER_SUPPLY_PROP_HEALTH,
 628         POWER_SUPPLY_PROP_MANUFACTURER,
 629 };
 630
 631 static enum power_supply_property bq27520g4_props[] = {
 632         POWER_SUPPLY_PROP_STATUS,
 633         POWER_SUPPLY_PROP_PRESENT,
 634         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 635         POWER_SUPPLY_PROP_CURRENT_NOW,
 636         POWER_SUPPLY_PROP_CAPACITY,
 637         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 638         POWER_SUPPLY_PROP_TEMP,
 639         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 640         POWER_SUPPLY_PROP_TECHNOLOGY,
 641         POWER_SUPPLY_PROP_CHARGE_FULL,
 642         POWER_SUPPLY_PROP_CHARGE_NOW,
 643         POWER_SUPPLY_PROP_CYCLE_COUNT,
 644         POWER_SUPPLY_PROP_HEALTH,
 645         POWER_SUPPLY_PROP_MANUFACTURER,
 646 };
 647
 648 static enum power_supply_property bq27521_props[] = {
 649         POWER_SUPPLY_PROP_STATUS,
 650         POWER_SUPPLY_PROP_PRESENT,
 651         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 652         POWER_SUPPLY_PROP_CURRENT_NOW,
 653         POWER_SUPPLY_PROP_TEMP,
 654         POWER_SUPPLY_PROP_TECHNOLOGY,
 655 };
 656
 657 static enum power_supply_property bq27530_props[] = {
 658         POWER_SUPPLY_PROP_STATUS,
 659         POWER_SUPPLY_PROP_PRESENT,
 660         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 661         POWER_SUPPLY_PROP_CURRENT_NOW,
 662         POWER_SUPPLY_PROP_CAPACITY,
 663         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 664         POWER_SUPPLY_PROP_TEMP,
 665         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 666         POWER_SUPPLY_PROP_TECHNOLOGY,
 667         POWER_SUPPLY_PROP_CHARGE_FULL,
 668         POWER_SUPPLY_PROP_CHARGE_NOW,
 669         POWER_SUPPLY_PROP_POWER_AVG,
 670         POWER_SUPPLY_PROP_HEALTH,
 671         POWER_SUPPLY_PROP_CYCLE_COUNT,
 672         POWER_SUPPLY_PROP_MANUFACTURER,
 673 };
 674 #define bq27531_props bq27530_props
 675
 676 static enum power_supply_property bq27541_props[] = {
 677         POWER_SUPPLY_PROP_STATUS,
 678         POWER_SUPPLY_PROP_PRESENT,
 679         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 680         POWER_SUPPLY_PROP_CURRENT_NOW,
 681         POWER_SUPPLY_PROP_CAPACITY,
 682         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 683         POWER_SUPPLY_PROP_TEMP,
 684         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 685         POWER_SUPPLY_PROP_TECHNOLOGY,
 686         POWER_SUPPLY_PROP_CHARGE_FULL,
 687         POWER_SUPPLY_PROP_CHARGE_NOW,
 688         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 689         POWER_SUPPLY_PROP_CYCLE_COUNT,
 690         POWER_SUPPLY_PROP_POWER_AVG,
 691         POWER_SUPPLY_PROP_HEALTH,
 692         POWER_SUPPLY_PROP_MANUFACTURER,
 693 };
 694 #define bq27542_props bq27541_props
 695 #define bq27546_props bq27541_props
 696 #define bq27742_props bq27541_props
 697
 698 static enum power_supply_property bq27545_props[] = {
 699         POWER_SUPPLY_PROP_STATUS,
 700         POWER_SUPPLY_PROP_PRESENT,
 701         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 702         POWER_SUPPLY_PROP_CURRENT_NOW,
 703         POWER_SUPPLY_PROP_CAPACITY,
 704         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 705         POWER_SUPPLY_PROP_TEMP,
 706         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 707         POWER_SUPPLY_PROP_TECHNOLOGY,
 708         POWER_SUPPLY_PROP_CHARGE_FULL,
 709         POWER_SUPPLY_PROP_CHARGE_NOW,
 710         POWER_SUPPLY_PROP_HEALTH,
 711         POWER_SUPPLY_PROP_CYCLE_COUNT,
 712         POWER_SUPPLY_PROP_POWER_AVG,
 713         POWER_SUPPLY_PROP_MANUFACTURER,
 714 };
 715
 716 static enum power_supply_property bq27421_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_TECHNOLOGY,
 725         POWER_SUPPLY_PROP_CHARGE_FULL,
 726         POWER_SUPPLY_PROP_CHARGE_NOW,
 727         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 728         POWER_SUPPLY_PROP_MANUFACTURER,
 729 };
 730 #define bq27411_props bq27421_props
 731 #define bq27425_props bq27421_props
 732 #define bq27426_props bq27421_props
 733 #define bq27441_props bq27421_props
 734 #define bq27621_props bq27421_props
 735
 736 static enum power_supply_property bq27z561_props[] = {
 737         POWER_SUPPLY_PROP_STATUS,
 738         POWER_SUPPLY_PROP_PRESENT,
 739         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 740         POWER_SUPPLY_PROP_CURRENT_NOW,
 741         POWER_SUPPLY_PROP_CAPACITY,
 742         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 743         POWER_SUPPLY_PROP_TEMP,
 744         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 745         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 746         POWER_SUPPLY_PROP_TECHNOLOGY,
 747         POWER_SUPPLY_PROP_CHARGE_FULL,
 748         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 749         POWER_SUPPLY_PROP_CYCLE_COUNT,
 750         POWER_SUPPLY_PROP_POWER_AVG,
 751         POWER_SUPPLY_PROP_HEALTH,
 752         POWER_SUPPLY_PROP_MANUFACTURER,
 753 };
 754
 755 static enum power_supply_property bq28z610_props[] = {
 756         POWER_SUPPLY_PROP_STATUS,
 757         POWER_SUPPLY_PROP_PRESENT,
 758         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 759         POWER_SUPPLY_PROP_CURRENT_NOW,
 760         POWER_SUPPLY_PROP_CAPACITY,
 761         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 762         POWER_SUPPLY_PROP_TEMP,
 763         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 764         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 765         POWER_SUPPLY_PROP_TECHNOLOGY,
 766         POWER_SUPPLY_PROP_CHARGE_FULL,
 767         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 768         POWER_SUPPLY_PROP_CYCLE_COUNT,
 769         POWER_SUPPLY_PROP_POWER_AVG,
 770         POWER_SUPPLY_PROP_HEALTH,
 771         POWER_SUPPLY_PROP_MANUFACTURER,
 772 };
 773
 774 static enum power_supply_property bq34z100_props[] = {
 775         POWER_SUPPLY_PROP_STATUS,
 776         POWER_SUPPLY_PROP_PRESENT,
 777         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 778         POWER_SUPPLY_PROP_CURRENT_NOW,
 779         POWER_SUPPLY_PROP_CAPACITY,
 780         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 781         POWER_SUPPLY_PROP_TEMP,
 782         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 783         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 784         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 785         POWER_SUPPLY_PROP_TECHNOLOGY,
 786         POWER_SUPPLY_PROP_CHARGE_FULL,
 787         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 788         POWER_SUPPLY_PROP_CYCLE_COUNT,
 789         POWER_SUPPLY_PROP_ENERGY_NOW,
 790         POWER_SUPPLY_PROP_POWER_AVG,
 791         POWER_SUPPLY_PROP_HEALTH,
 792         POWER_SUPPLY_PROP_MANUFACTURER,
 793 };
 794
 795 struct bq27xxx_dm_reg {
 796         u8 subclass_id;
 797         u8 offset;
 798         u8 bytes;
 799         u16 min, max;
 800 };
 801
 802 enum bq27xxx_dm_reg_id {
 803         BQ27XXX_DM_DESIGN_CAPACITY = 0,
 804         BQ27XXX_DM_DESIGN_ENERGY,
 805         BQ27XXX_DM_TERMINATE_VOLTAGE,
 806 };
 807
 808 #define bq27000_dm_regs 0
 809 #define bq27010_dm_regs 0
 810 #define bq2750x_dm_regs 0
 811 #define bq2751x_dm_regs 0
 812 #define bq2752x_dm_regs 0
 813
 814 #if 0 /* not yet tested */
 815 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
 816         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 10, 2,    0, 65535 },
 817         [BQ27XXX_DM_DESIGN_ENERGY]     = { }, /* missing on chip */
 818         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
 819 };
 820 #else
 821 #define bq27500_dm_regs 0
 822 #endif
 823
 824 /* todo create data memory definitions from datasheets and test on chips */
 825 #define bq27510g1_dm_regs 0
 826 #define bq27510g2_dm_regs 0
 827 #define bq27510g3_dm_regs 0
 828 #define bq27520g1_dm_regs 0
 829 #define bq27520g2_dm_regs 0
 830 #define bq27520g3_dm_regs 0
 831 #define bq27520g4_dm_regs 0
 832 #define bq27521_dm_regs 0
 833 #define bq27530_dm_regs 0
 834 #define bq27531_dm_regs 0
 835 #define bq27541_dm_regs 0
 836 #define bq27542_dm_regs 0
 837 #define bq27546_dm_regs 0
 838 #define bq27742_dm_regs 0
 839
 840 #if 0 /* not yet tested */
 841 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
 842         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 48, 23, 2,    0, 32767 },
 843         [BQ27XXX_DM_DESIGN_ENERGY]     = { 48, 25, 2,    0, 32767 },
 844         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800,  3700 },
 845 };
 846 #else
 847 #define bq27545_dm_regs 0
 848 #endif
 849
 850 static struct bq27xxx_dm_reg bq27411_dm_regs[] = {
 851         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0, 32767 },
 852         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 853         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2800,  3700 },
 854 };
 855
 856 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
 857         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 10, 2,    0,  8000 },
 858         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 12, 2,    0, 32767 },
 859         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500,  3700 },
 860 };
 861
 862 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
 863         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 12, 2,    0, 32767 },
 864         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 14, 2,    0, 32767 },
 865         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800,  3700 },
 866 };
 867
 868 static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
 869         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82,  6, 2,    0,  8000 },
 870         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82,  8, 2,    0, 32767 },
 871         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 10, 2, 2500,  3700 },
 872 };
 873
 874 #if 0 /* not yet tested */
 875 #define bq27441_dm_regs bq27421_dm_regs
 876 #else
 877 #define bq27441_dm_regs 0
 878 #endif
 879
 880 #if 0 /* not yet tested */
 881 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
 882         [BQ27XXX_DM_DESIGN_CAPACITY]   = { 82, 3, 2,    0,  8000 },
 883         [BQ27XXX_DM_DESIGN_ENERGY]     = { 82, 5, 2,    0, 32767 },
 884         [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500,  3700 },
 885 };
 886 #else
 887 #define bq27621_dm_regs 0
 888 #endif
 889
 890 #define bq27z561_dm_regs 0
 891 #define bq28z610_dm_regs 0
 892 #define bq34z100_dm_regs 0
 893
 894 #define BQ27XXX_O_ZERO          BIT(0)
 895 #define BQ27XXX_O_OTDC          BIT(1) /* has OTC/OTD overtemperature flags */
 896 #define BQ27XXX_O_UTOT          BIT(2) /* has OT overtemperature flag */
 897 #define BQ27XXX_O_CFGUP         BIT(3)
 898 #define BQ27XXX_O_RAM           BIT(4)
 899 #define BQ27Z561_O_BITS         BIT(5)
 900 #define BQ27XXX_O_SOC_SI        BIT(6) /* SoC is single register */
 901 #define BQ27XXX_O_HAS_CI        BIT(7) /* has Capacity Inaccurate flag */
 902 #define BQ27XXX_O_MUL_CHEM      BIT(8) /* multiple chemistries supported */
 903
 904 #define BQ27XXX_DATA(ref, key, opt) {           \
 905         .opts = (opt),                          \
 906         .unseal_key = key,                      \
 907         .regs  = ref##_regs,                    \
 908         .dm_regs = ref##_dm_regs,               \
 909         .props = ref##_props,                   \
 910         .props_size = ARRAY_SIZE(ref##_props) }
 911
 912 static struct {
 913         u32 opts;
 914         u32 unseal_key;
 915         u8 *regs;
 916         struct bq27xxx_dm_reg *dm_regs;
 917         enum power_supply_property *props;
 918         size_t props_size;
 919 } bq27xxx_chip_data[] = {
 920         [BQ27000]   = BQ27XXX_DATA(bq27000,   0         , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI | BQ27XXX_O_HAS_CI),
 921         [BQ27010]   = BQ27XXX_DATA(bq27010,   0         , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI | BQ27XXX_O_HAS_CI),
 922         [BQ2750X]   = BQ27XXX_DATA(bq2750x,   0         , BQ27XXX_O_OTDC),
 923         [BQ2751X]   = BQ27XXX_DATA(bq2751x,   0         , BQ27XXX_O_OTDC),
 924         [BQ2752X]   = BQ27XXX_DATA(bq2752x,   0         , BQ27XXX_O_OTDC),
 925         [BQ27500]   = BQ27XXX_DATA(bq27500,   0x04143672, BQ27XXX_O_OTDC),
 926         [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0         , BQ27XXX_O_OTDC),
 927         [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0         , BQ27XXX_O_OTDC),
 928         [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0         , BQ27XXX_O_OTDC),
 929         [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0         , BQ27XXX_O_OTDC),
 930         [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0         , BQ27XXX_O_OTDC),
 931         [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0         , BQ27XXX_O_OTDC),
 932         [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0         , BQ27XXX_O_OTDC),
 933         [BQ27521]   = BQ27XXX_DATA(bq27521,   0         , 0),
 934         [BQ27530]   = BQ27XXX_DATA(bq27530,   0         , BQ27XXX_O_UTOT),
 935         [BQ27531]   = BQ27XXX_DATA(bq27531,   0         , BQ27XXX_O_UTOT),
 936         [BQ27541]   = BQ27XXX_DATA(bq27541,   0         , BQ27XXX_O_OTDC),
 937         [BQ27542]   = BQ27XXX_DATA(bq27542,   0         , BQ27XXX_O_OTDC),
 938         [BQ27546]   = BQ27XXX_DATA(bq27546,   0         , BQ27XXX_O_OTDC),
 939         [BQ27742]   = BQ27XXX_DATA(bq27742,   0         , BQ27XXX_O_OTDC),
 940         [BQ27545]   = BQ27XXX_DATA(bq27545,   0x04143672, BQ27XXX_O_OTDC),
 941         [BQ27411]   = BQ27XXX_DATA(bq27411,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 942         [BQ27421]   = BQ27XXX_DATA(bq27421,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 943         [BQ27425]   = BQ27XXX_DATA(bq27425,   0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
 944         [BQ27426]   = BQ27XXX_DATA(bq27426,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 945         [BQ27441]   = BQ27XXX_DATA(bq27441,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 946         [BQ27621]   = BQ27XXX_DATA(bq27621,   0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
 947         [BQ27Z561]  = BQ27XXX_DATA(bq27z561,  0         , BQ27Z561_O_BITS),
 948         [BQ28Z610]  = BQ27XXX_DATA(bq28z610,  0         , BQ27Z561_O_BITS),
 949         [BQ34Z100]  = BQ27XXX_DATA(bq34z100,  0         , BQ27XXX_O_OTDC | BQ27XXX_O_SOC_SI | \
 950                                                           BQ27XXX_O_HAS_CI | BQ27XXX_O_MUL_CHEM),
 951 };
 952
 953 static DEFINE_MUTEX(bq27xxx_list_lock);
 954 static LIST_HEAD(bq27xxx_battery_devices);
 955
 956 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
 957
 958 #define BQ27XXX_DM_SZ   32
 959
 960 /**
 961  * struct bq27xxx_dm_buf - chip data memory buffer
 962  * @class: data memory subclass_id
 963  * @block: data memory block number
 964  * @data: data from/for the block
 965  * @has_data: true if data has been filled by read
 966  * @dirty: true if data has changed since last read/write
 967  *
 968  * Encapsulates info required to manage chip data memory blocks.
 969  */
 970 struct bq27xxx_dm_buf {
 971         u8 class;
 972         u8 block;
 973         u8 data[BQ27XXX_DM_SZ];
 974         bool has_data, dirty;
 975 };
 976
 977 #define BQ27XXX_DM_BUF(di, i) { \
 978         .class = (di)->dm_regs[i].subclass_id, \
 979         .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
 980 }
 981
 982 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
 983                                       struct bq27xxx_dm_reg *reg)
 984 {
 985         if (buf->class == reg->subclass_id &&
 986             buf->block == reg->offset / BQ27XXX_DM_SZ)
 987                 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
 988
 989         return NULL;
 990 }
 991
 992 static const char * const bq27xxx_dm_reg_name[] = {
 993         [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
 994         [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
 995         [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
 996 };
 997
 998
 999 static bool bq27xxx_dt_to_nvm = true;
1000 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
1001 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
1002         "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
1003         "Users must set this =0 when installing a different type of battery!\n"
1004         "Default is =1."
1005 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1006         "\nSetting this affects future kernel updates, not the current configuration."
1007 #endif
1008 );
1009
1010 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
1011 {
1012         struct bq27xxx_device_info *di;
1013         unsigned int prev_val = *(unsigned int *) kp->arg;
1014         int ret;
1015
1016         ret = param_set_uint(val, kp);
1017         if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
1018                 return ret;
1019
1020         mutex_lock(&bq27xxx_list_lock);
1021         list_for_each_entry(di, &bq27xxx_battery_devices, list)
1022                 mod_delayed_work(system_wq, &di->work, 0);
1023         mutex_unlock(&bq27xxx_list_lock);
1024
1025         return ret;
1026 }
1027
1028 static const struct kernel_param_ops param_ops_poll_interval = {
1029         .get = param_get_uint,
1030         .set = poll_interval_param_set,
1031 };
1032
1033 static unsigned int poll_interval = 360;
1034 module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
1035 MODULE_PARM_DESC(poll_interval,
1036                  "battery poll interval in seconds - 0 disables polling");
1037
1038 /*
1039  * Common code for BQ27xxx devices
1040  */
1041
1042 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
1043                                bool single)
1044 {
1045         int ret;
1046
1047         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1048                 return -EINVAL;
1049
1050         ret = di->bus.read(di, di->regs[reg_index], single);
1051         if (ret < 0)
1052                 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
1053                         di->regs[reg_index], reg_index);
1054
1055         return ret;
1056 }
1057
1058 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
1059                                 u16 value, bool single)
1060 {
1061         int ret;
1062
1063         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1064                 return -EINVAL;
1065
1066         if (!di->bus.write)
1067                 return -EPERM;
1068
1069         ret = di->bus.write(di, di->regs[reg_index], value, single);
1070         if (ret < 0)
1071                 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
1072                         di->regs[reg_index], reg_index);
1073
1074         return ret;
1075 }
1076
1077 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
1078                                      u8 *data, int len)
1079 {
1080         int ret;
1081
1082         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1083                 return -EINVAL;
1084
1085         if (!di->bus.read_bulk)
1086                 return -EPERM;
1087
1088         ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
1089         if (ret < 0)
1090                 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
1091                         di->regs[reg_index], reg_index);
1092
1093         return ret;
1094 }
1095
1096 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
1097                                       u8 *data, int len)
1098 {
1099         int ret;
1100
1101         if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
1102                 return -EINVAL;
1103
1104         if (!di->bus.write_bulk)
1105                 return -EPERM;
1106
1107         ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
1108         if (ret < 0)
1109                 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
1110                         di->regs[reg_index], reg_index);
1111
1112         return ret;
1113 }
1114
1115 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
1116 {
1117         int ret;
1118
1119         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
1120         if (ret < 0) {
1121                 dev_err(di->dev, "bus error on seal: %d\n", ret);
1122                 return ret;
1123         }
1124
1125         return 0;
1126 }
1127
1128 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
1129 {
1130         int ret;
1131
1132         if (di->unseal_key == 0) {
1133                 dev_err(di->dev, "unseal failed due to missing key\n");
1134                 return -EINVAL;
1135         }
1136
1137         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
1138         if (ret < 0)
1139                 goto out;
1140
1141         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
1142         if (ret < 0)
1143                 goto out;
1144
1145         return 0;
1146
1147 out:
1148         dev_err(di->dev, "bus error on unseal: %d\n", ret);
1149         return ret;
1150 }
1151
1152 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
1153 {
1154         u16 sum = 0;
1155         int i;
1156
1157         for (i = 0; i < BQ27XXX_DM_SZ; i++)
1158                 sum += buf->data[i];
1159         sum &= 0xff;
1160
1161         return 0xff - sum;
1162 }
1163
1164 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
1165                                          struct bq27xxx_dm_buf *buf)
1166 {
1167         int ret;
1168
1169         buf->has_data = false;
1170
1171         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1172         if (ret < 0)
1173                 goto out;
1174
1175         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1176         if (ret < 0)
1177                 goto out;
1178
1179         BQ27XXX_MSLEEP(1);
1180
1181         ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1182         if (ret < 0)
1183                 goto out;
1184
1185         ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1186         if (ret < 0)
1187                 goto out;
1188
1189         if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1190                 ret = -EINVAL;
1191                 goto out;
1192         }
1193
1194         buf->has_data = true;
1195         buf->dirty = false;
1196
1197         return 0;
1198
1199 out:
1200         dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1201         return ret;
1202 }
1203
1204 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1205                                             struct bq27xxx_dm_buf *buf,
1206                                             enum bq27xxx_dm_reg_id reg_id,
1207                                             unsigned int val)
1208 {
1209         struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1210         const char *str = bq27xxx_dm_reg_name[reg_id];
1211         u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1212
1213         if (prev == NULL) {
1214                 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1215                 return;
1216         }
1217
1218         if (reg->bytes != 2) {
1219                 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1220                 return;
1221         }
1222
1223         if (!buf->has_data)
1224                 return;
1225
1226         if (be16_to_cpup(prev) == val) {
1227                 dev_info(di->dev, "%s has %u\n", str, val);
1228                 return;
1229         }
1230
1231 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1232         if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1233 #else
1234         if (!(di->opts & BQ27XXX_O_RAM)) {
1235 #endif
1236                 /* devicetree and NVM differ; defer to NVM */
1237                 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1238 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1239                          "by dt_monitored_battery_updates_nvm=0"
1240 #else
1241                          "for flash/NVM data memory"
1242 #endif
1243                          "\n", str, be16_to_cpup(prev), val);
1244                 return;
1245         }
1246
1247         dev_info(di->dev, "update %s to %u\n", str, val);
1248
1249         *prev = cpu_to_be16(val);
1250         buf->dirty = true;
1251 }
1252
1253 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1254 {
1255         const int limit = 100;
1256         u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1257         int ret, try = limit;
1258
1259         ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1260         if (ret < 0)
1261                 return ret;
1262
1263         do {
1264                 BQ27XXX_MSLEEP(25);
1265                 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1266                 if (ret < 0)
1267                         return ret;
1268         } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1269
1270         if (!try && di->chip != BQ27425) { // 425 has a bug
1271                 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1272                 return -EINVAL;
1273         }
1274
1275         if (limit - try > 3)
1276                 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1277
1278         return 0;
1279 }
1280
1281 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1282 {
1283         int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1284         if (ret < 0 && ret != -EINVAL)
1285                 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1286
1287         return ret;
1288 }
1289
1290 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1291 {
1292         int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1293         if (ret < 0 && ret != -EINVAL)
1294                 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1295
1296         return ret;
1297 }
1298
1299 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1300                                           struct bq27xxx_dm_buf *buf)
1301 {
1302         bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1303         int ret;
1304
1305         if (!buf->dirty)
1306                 return 0;
1307
1308         if (cfgup) {
1309                 ret = bq27xxx_battery_set_cfgupdate(di);
1310                 if (ret < 0)
1311                         return ret;
1312         }
1313
1314         ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1315         if (ret < 0)
1316                 goto out;
1317
1318         ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1319         if (ret < 0)
1320                 goto out;
1321
1322         ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1323         if (ret < 0)
1324                 goto out;
1325
1326         BQ27XXX_MSLEEP(1);
1327
1328         ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1329         if (ret < 0)
1330                 goto out;
1331
1332         ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1333                             bq27xxx_battery_checksum_dm_block(buf), true);
1334         if (ret < 0)
1335                 goto out;
1336
1337         /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1338          * corruption on the '425 chip (and perhaps others), which can damage
1339          * the chip.
1340          */
1341
1342         if (cfgup) {
1343                 BQ27XXX_MSLEEP(1);
1344                 ret = bq27xxx_battery_soft_reset(di);
1345                 if (ret < 0)
1346                         return ret;
1347         } else {
1348                 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1349         }
1350
1351         buf->dirty = false;
1352
1353         return 0;
1354
1355 out:
1356         if (cfgup)
1357                 bq27xxx_battery_soft_reset(di);
1358
1359         dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1360         return ret;
1361 }
1362
1363 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1364                                        struct power_supply_battery_info *info)
1365 {
1366         struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1367         struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1368         bool updated;
1369
1370         if (bq27xxx_battery_unseal(di) < 0)
1371                 return;
1372
1373         if (info->charge_full_design_uah != -EINVAL &&
1374             info->energy_full_design_uwh != -EINVAL) {
1375                 bq27xxx_battery_read_dm_block(di, &bd);
1376                 /* assume design energy & capacity are in same block */
1377                 bq27xxx_battery_update_dm_block(di, &bd,
1378                                         BQ27XXX_DM_DESIGN_CAPACITY,
1379                                         info->charge_full_design_uah / 1000);
1380                 bq27xxx_battery_update_dm_block(di, &bd,
1381                                         BQ27XXX_DM_DESIGN_ENERGY,
1382                                         info->energy_full_design_uwh / 1000);
1383         }
1384
1385         if (info->voltage_min_design_uv != -EINVAL) {
1386                 bool same = bd.class == bt.class && bd.block == bt.block;
1387                 if (!same)
1388                         bq27xxx_battery_read_dm_block(di, &bt);
1389                 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1390                                         BQ27XXX_DM_TERMINATE_VOLTAGE,
1391                                         info->voltage_min_design_uv / 1000);
1392         }
1393
1394         updated = bd.dirty || bt.dirty;
1395
1396         bq27xxx_battery_write_dm_block(di, &bd);
1397         bq27xxx_battery_write_dm_block(di, &bt);
1398
1399         bq27xxx_battery_seal(di);
1400
1401         if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1402                 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1403                 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1404         }
1405         /* assume bq27xxx_battery_update() is called hereafter */
1406 }
1407
1408 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1409 {
1410         struct power_supply_battery_info info = {};
1411         unsigned int min, max;
1412
1413         if (power_supply_get_battery_info(di->bat, &info) < 0)
1414                 return;
1415
1416         if (!di->dm_regs) {
1417                 dev_warn(di->dev, "data memory update not supported for chip\n");
1418                 return;
1419         }
1420
1421         if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1422                 if (info.energy_full_design_uwh == -EINVAL)
1423                         dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1424                 else if (info.charge_full_design_uah == -EINVAL)
1425                         dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1426         }
1427
1428         /* assume min == 0 */
1429         max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1430         if (info.energy_full_design_uwh > max * 1000) {
1431                 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1432                         info.energy_full_design_uwh);
1433                 info.energy_full_design_uwh = -EINVAL;
1434         }
1435
1436         /* assume min == 0 */
1437         max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1438         if (info.charge_full_design_uah > max * 1000) {
1439                 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1440                         info.charge_full_design_uah);
1441                 info.charge_full_design_uah = -EINVAL;
1442         }
1443
1444         min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1445         max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1446         if ((info.voltage_min_design_uv < min * 1000 ||
1447              info.voltage_min_design_uv > max * 1000) &&
1448              info.voltage_min_design_uv != -EINVAL) {
1449                 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1450                         info.voltage_min_design_uv);
1451                 info.voltage_min_design_uv = -EINVAL;
1452         }
1453
1454         if ((info.energy_full_design_uwh != -EINVAL &&
1455              info.charge_full_design_uah != -EINVAL) ||
1456              info.voltage_min_design_uv  != -EINVAL)
1457                 bq27xxx_battery_set_config(di, &info);
1458 }
1459
1460 /*
1461  * Return the battery State-of-Charge
1462  * Or < 0 if something fails.
1463  */
1464 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1465 {
1466         int soc;
1467
1468         if (di->opts & BQ27XXX_O_SOC_SI)
1469                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1470         else
1471                 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1472
1473         if (soc < 0)
1474                 dev_dbg(di->dev, "error reading State-of-Charge\n");
1475
1476         return soc;
1477 }
1478
1479 /*
1480  * Return a battery charge value in µAh
1481  * Or < 0 if something fails.
1482  */
1483 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1484 {
1485         int charge;
1486
1487         charge = bq27xxx_read(di, reg, false);
1488         if (charge < 0) {
1489                 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1490                         reg, charge);
1491                 return charge;
1492         }
1493
1494         if (di->opts & BQ27XXX_O_ZERO)
1495                 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1496         else
1497                 charge *= 1000;
1498
1499         return charge;
1500 }
1501
1502 /*
1503  * Return the battery Nominal available capacity in µAh
1504  * Or < 0 if something fails.
1505  */
1506 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1507 {
1508         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1509 }
1510
1511 /*
1512  * Return the battery Full Charge Capacity in µAh
1513  * Or < 0 if something fails.
1514  */
1515 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1516 {
1517         return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1518 }
1519
1520 /*
1521  * Return the Design Capacity in µAh
1522  * Or < 0 if something fails.
1523  */
1524 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1525 {
1526         int dcap;
1527
1528         if (di->opts & BQ27XXX_O_ZERO)
1529                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1530         else
1531                 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1532
1533         if (dcap < 0) {
1534                 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1535                 return dcap;
1536         }
1537
1538         if (di->opts & BQ27XXX_O_ZERO)
1539                 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1540         else
1541                 dcap *= 1000;
1542
1543         return dcap;
1544 }
1545
1546 /*
1547  * Return the battery Available energy in µWh
1548  * Or < 0 if something fails.
1549  */
1550 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1551 {
1552         int ae;
1553
1554         ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1555         if (ae < 0) {
1556                 dev_dbg(di->dev, "error reading available energy\n");
1557                 return ae;
1558         }
1559
1560         if (di->opts & BQ27XXX_O_ZERO)
1561                 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1562         else
1563                 ae *= 1000;
1564
1565         return ae;
1566 }
1567
1568 /*
1569  * Return the battery temperature in tenths of degree Kelvin
1570  * Or < 0 if something fails.
1571  */
1572 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1573 {
1574         int temp;
1575
1576         temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1577         if (temp < 0) {
1578                 dev_err(di->dev, "error reading temperature\n");
1579                 return temp;
1580         }
1581
1582         if (di->opts & BQ27XXX_O_ZERO)
1583                 temp = 5 * temp / 2;
1584
1585         return temp;
1586 }
1587
1588 /*
1589  * Return the battery Cycle count total
1590  * Or < 0 if something fails.
1591  */
1592 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1593 {
1594         int cyct;
1595
1596         cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1597         if (cyct < 0)
1598                 dev_err(di->dev, "error reading cycle count total\n");
1599
1600         return cyct;
1601 }
1602
1603 /*
1604  * Read a time register.
1605  * Return < 0 if something fails.
1606  */
1607 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1608 {
1609         int tval;
1610
1611         tval = bq27xxx_read(di, reg, false);
1612         if (tval < 0) {
1613                 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1614                         reg, tval);
1615                 return tval;
1616         }
1617
1618         if (tval == 65535)
1619                 return -ENODATA;
1620
1621         return tval * 60;
1622 }
1623
1624 /*
1625  * Returns true if a battery over temperature condition is detected
1626  */
1627 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1628 {
1629         if (di->opts & BQ27XXX_O_OTDC)
1630                 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1631         if (di->opts & BQ27XXX_O_UTOT)
1632                 return flags & BQ27XXX_FLAG_OT;
1633
1634         return false;
1635 }
1636
1637 /*
1638  * Returns true if a battery under temperature condition is detected
1639  */
1640 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1641 {
1642         if (di->opts & BQ27XXX_O_UTOT)
1643                 return flags & BQ27XXX_FLAG_UT;
1644
1645         return false;
1646 }
1647
1648 /*
1649  * Returns true if a low state of charge condition is detected
1650  */
1651 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1652 {
1653         if (di->opts & BQ27XXX_O_ZERO)
1654                 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1655         else if (di->opts & BQ27Z561_O_BITS)
1656                 return flags & BQ27Z561_FLAG_FDC;
1657         else
1658                 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1659 }
1660
1661 /*
1662  * Returns true if reported battery capacity is inaccurate
1663  */
1664 static bool bq27xxx_battery_capacity_inaccurate(struct bq27xxx_device_info *di,
1665                                                  u16 flags)
1666 {
1667         if (di->opts & BQ27XXX_O_HAS_CI)
1668                 return (flags & BQ27000_FLAG_CI);
1669         else
1670                 return false;
1671 }
1672
1673 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1674 {
1675         /* Unlikely but important to return first */
1676         if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
1677                 return POWER_SUPPLY_HEALTH_OVERHEAT;
1678         if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
1679                 return POWER_SUPPLY_HEALTH_COLD;
1680         if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
1681                 return POWER_SUPPLY_HEALTH_DEAD;
1682         if (unlikely(bq27xxx_battery_capacity_inaccurate(di, di->cache.flags)))
1683                 return POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
1684
1685         return POWER_SUPPLY_HEALTH_GOOD;
1686 }
1687
1688 static bool bq27xxx_battery_is_full(struct bq27xxx_device_info *di, int flags)
1689 {
1690         if (di->opts & BQ27XXX_O_ZERO)
1691                 return (flags & BQ27000_FLAG_FC);
1692         else if (di->opts & BQ27Z561_O_BITS)
1693                 return (flags & BQ27Z561_FLAG_FC);
1694         else
1695                 return (flags & BQ27XXX_FLAG_FC);
1696 }
1697
1698 /*
1699  * Return the battery average current in µA and the status
1700  * Note that current can be negative signed as well
1701  * Or 0 if something fails.
1702  */
1703 static int bq27xxx_battery_current_and_status(
1704         struct bq27xxx_device_info *di,
1705         union power_supply_propval *val_curr,
1706         union power_supply_propval *val_status,
1707         struct bq27xxx_reg_cache *cache)
1708 {
1709         bool single_flags = (di->opts & BQ27XXX_O_ZERO);
1710         int curr;
1711         int flags;
1712
1713         curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1714         if (curr < 0) {
1715                 dev_err(di->dev, "error reading current\n");
1716                 return curr;
1717         }
1718
1719         if (cache) {
1720                 flags = cache->flags;
1721         } else {
1722                 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, single_flags);
1723                 if (flags < 0) {
1724                         dev_err(di->dev, "error reading flags\n");
1725                         return flags;
1726                 }
1727         }
1728
1729         if (di->opts & BQ27XXX_O_ZERO) {
1730                 if (!(flags & BQ27000_FLAG_CHGS)) {
1731                         dev_dbg(di->dev, "negative current!\n");
1732                         curr = -curr;
1733                 }
1734
1735                 curr = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1736         } else {
1737                 /* Other gauges return signed value */
1738                 curr = (int)((s16)curr) * 1000;
1739         }
1740
1741         if (val_curr)
1742                 val_curr->intval = curr;
1743
1744         if (val_status) {
1745                 if (curr > 0) {
1746                         val_status->intval = POWER_SUPPLY_STATUS_CHARGING;
1747                 } else if (curr < 0) {
1748                         val_status->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1749                 } else {
1750                         if (bq27xxx_battery_is_full(di, flags))
1751                                 val_status->intval = POWER_SUPPLY_STATUS_FULL;
1752                         else
1753                                 val_status->intval =
1754                                         POWER_SUPPLY_STATUS_NOT_CHARGING;
1755                 }
1756         }
1757
1758         return 0;
1759 }
1760
1761 static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di)
1762 {
1763         union power_supply_propval status = di->last_status;
1764         struct bq27xxx_reg_cache cache = {0, };
1765         bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1766
1767         cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1768         if ((cache.flags & 0xff) == 0xff)
1769                 cache.flags = -1; /* read error */
1770         if (cache.flags >= 0) {
1771                 cache.temperature = bq27xxx_battery_read_temperature(di);
1772                 if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1773                         cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1774                 if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1775                         cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1776                 if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1777                         cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1778
1779                 cache.charge_full = bq27xxx_battery_read_fcc(di);
1780                 cache.capacity = bq27xxx_battery_read_soc(di);
1781                 if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1782                         cache.energy = bq27xxx_battery_read_energy(di);
1783                 di->cache.flags = cache.flags;
1784                 cache.health = bq27xxx_battery_read_health(di);
1785                 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1786                         cache.cycle_count = bq27xxx_battery_read_cyct(di);
1787
1788                 /*
1789                  * On gauges with signed current reporting the current must be
1790                  * checked to detect charging <-> discharging status changes.
1791                  */
1792                 if (!(di->opts & BQ27XXX_O_ZERO))
1793                         bq27xxx_battery_current_and_status(di, NULL, &status, &cache);
1794
1795                 /* We only have to read charge design full once */
1796                 if (di->charge_design_full <= 0)
1797                         di->charge_design_full = bq27xxx_battery_read_dcap(di);
1798         }
1799
1800         if ((di->cache.capacity != cache.capacity) ||
1801             (di->cache.flags != cache.flags) ||
1802             (di->last_status.intval != status.intval)) {
1803                 di->last_status.intval = status.intval;
1804                 power_supply_changed(di->bat);
1805         }
1806
1807         if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1808                 di->cache = cache;
1809
1810         di->last_update = jiffies;
1811
1812         if (!di->removed && poll_interval > 0)
1813                 mod_delayed_work(system_wq, &di->work, poll_interval * HZ);
1814 }
1815
1816 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1817 {
1818         mutex_lock(&di->lock);
1819         bq27xxx_battery_update_unlocked(di);
1820         mutex_unlock(&di->lock);
1821 }
1822 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1823
1824 static void bq27xxx_battery_poll(struct work_struct *work)
1825 {
1826         struct bq27xxx_device_info *di =
1827                         container_of(work, struct bq27xxx_device_info,
1828                                      work.work);
1829
1830         bq27xxx_battery_update(di);
1831 }
1832
1833 /*
1834  * Get the average power in µW
1835  * Return < 0 if something fails.
1836  */
1837 static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
1838                                    union power_supply_propval *val)
1839 {
1840         int power;
1841
1842         power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1843         if (power < 0) {
1844                 dev_err(di->dev,
1845                         "error reading average power register %02x: %d\n",
1846                         BQ27XXX_REG_AP, power);
1847                 return power;
1848         }
1849
1850         if (di->opts & BQ27XXX_O_ZERO)
1851                 val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1852         else
1853                 /* Other gauges return a signed value in units of 10mW */
1854                 val->intval = (int)((s16)power) * 10000;
1855
1856         return 0;
1857 }
1858
1859 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1860                                           union power_supply_propval *val)
1861 {
1862         int level;
1863
1864         if (di->opts & BQ27XXX_O_ZERO) {
1865                 if (di->cache.flags & BQ27000_FLAG_FC)
1866                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1867                 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1868                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1869                 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1870                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1871                 else
1872                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1873         } else if (di->opts & BQ27Z561_O_BITS) {
1874                 if (di->cache.flags & BQ27Z561_FLAG_FC)
1875                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1876                 else if (di->cache.flags & BQ27Z561_FLAG_FDC)
1877                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1878                 else
1879                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1880         } else {
1881                 if (di->cache.flags & BQ27XXX_FLAG_FC)
1882                         level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1883                 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1884                         level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1885                 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1886                         level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1887                 else
1888                         level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1889         }
1890
1891         val->intval = level;
1892
1893         return 0;
1894 }
1895
1896 /*
1897  * Return the battery Voltage in millivolts
1898  * Or < 0 if something fails.
1899  */
1900 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1901                                    union power_supply_propval *val)
1902 {
1903         int volt;
1904
1905         volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1906         if (volt < 0) {
1907                 dev_err(di->dev, "error reading voltage\n");
1908                 return volt;
1909         }
1910
1911         val->intval = volt * 1000;
1912
1913         return 0;
1914 }
1915
1916 static int bq27xxx_simple_value(int value,
1917                                 union power_supply_propval *val)
1918 {
1919         if (value < 0)
1920                 return value;
1921
1922         val->intval = value;
1923
1924         return 0;
1925 }
1926
1927 static int bq27xxx_battery_get_property(struct power_supply *psy,
1928                                         enum power_supply_property psp,
1929                                         union power_supply_propval *val)
1930 {
1931         int ret = 0;
1932         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1933
1934         mutex_lock(&di->lock);
1935         if (time_is_before_jiffies(di->last_update + 5 * HZ))
1936                 bq27xxx_battery_update_unlocked(di);
1937         mutex_unlock(&di->lock);
1938
1939         if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1940                 return -ENODEV;
1941
1942         switch (psp) {
1943         case POWER_SUPPLY_PROP_STATUS:
1944                 ret = bq27xxx_battery_current_and_status(di, NULL, val, NULL);
1945                 break;
1946         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1947                 ret = bq27xxx_battery_voltage(di, val);
1948                 break;
1949         case POWER_SUPPLY_PROP_PRESENT:
1950                 val->intval = di->cache.flags < 0 ? 0 : 1;
1951                 break;
1952         case POWER_SUPPLY_PROP_CURRENT_NOW:
1953                 ret = bq27xxx_battery_current_and_status(di, val, NULL, NULL);
1954                 break;
1955         case POWER_SUPPLY_PROP_CAPACITY:
1956                 ret = bq27xxx_simple_value(di->cache.capacity, val);
1957                 break;
1958         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1959                 ret = bq27xxx_battery_capacity_level(di, val);
1960                 break;
1961         case POWER_SUPPLY_PROP_TEMP:
1962                 ret = bq27xxx_simple_value(di->cache.temperature, val);
1963                 if (ret == 0)
1964                         val->intval -= 2731; /* convert decidegree k to c */
1965                 break;
1966         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1967                 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1968                 break;
1969         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1970                 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1971                 break;
1972         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1973                 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1974                 break;
1975         case POWER_SUPPLY_PROP_TECHNOLOGY:
1976                 if (di->opts & BQ27XXX_O_MUL_CHEM)
1977                         val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
1978                 else
1979                         val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1980                 break;
1981         case POWER_SUPPLY_PROP_CHARGE_NOW:
1982                 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1983                 break;
1984         case POWER_SUPPLY_PROP_CHARGE_FULL:
1985                 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1986                 break;
1987         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1988                 ret = bq27xxx_simple_value(di->charge_design_full, val);
1989                 break;
1990         /*
1991          * TODO: Implement these to make registers set from
1992          * power_supply_battery_info visible in sysfs.
1993          */
1994         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1995         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1996                 return -EINVAL;
1997         case POWER_SUPPLY_PROP_CYCLE_COUNT:
1998                 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1999                 break;
2000         case POWER_SUPPLY_PROP_ENERGY_NOW:
2001                 ret = bq27xxx_simple_value(di->cache.energy, val);
2002                 break;
2003         case POWER_SUPPLY_PROP_POWER_AVG:
2004                 ret = bq27xxx_battery_pwr_avg(di, val);
2005                 break;
2006         case POWER_SUPPLY_PROP_HEALTH:
2007                 ret = bq27xxx_simple_value(di->cache.health, val);
2008                 break;
2009         case POWER_SUPPLY_PROP_MANUFACTURER:
2010                 val->strval = BQ27XXX_MANUFACTURER;
2011                 break;
2012         default:
2013                 return -EINVAL;
2014         }
2015
2016         return ret;
2017 }
2018
2019 static void bq27xxx_external_power_changed(struct power_supply *psy)
2020 {
2021         struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
2022
2023         /* After charger plug in/out wait 0.5s for things to stabilize */
2024         mod_delayed_work(system_wq, &di->work, HZ / 2);
2025 }
2026
2027 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
2028 {
2029         struct power_supply_desc *psy_desc;
2030         struct power_supply_config psy_cfg = {
2031                 .of_node = di->dev->of_node,
2032                 .drv_data = di,
2033         };
2034
2035         INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
2036         mutex_init(&di->lock);
2037
2038         di->regs       = bq27xxx_chip_data[di->chip].regs;
2039         di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
2040         di->dm_regs    = bq27xxx_chip_data[di->chip].dm_regs;
2041         di->opts       = bq27xxx_chip_data[di->chip].opts;
2042
2043         psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
2044         if (!psy_desc)
2045                 return -ENOMEM;
2046
2047         psy_desc->name = di->name;
2048         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
2049         psy_desc->properties = bq27xxx_chip_data[di->chip].props;
2050         psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
2051         psy_desc->get_property = bq27xxx_battery_get_property;
2052         psy_desc->external_power_changed = bq27xxx_external_power_changed;
2053
2054         di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
2055         if (IS_ERR(di->bat))
2056                 return dev_err_probe(di->dev, PTR_ERR(di->bat),
2057                                      "failed to register battery\n");
2058
2059         bq27xxx_battery_settings(di);
2060         bq27xxx_battery_update(di);
2061
2062         mutex_lock(&bq27xxx_list_lock);
2063         list_add(&di->list, &bq27xxx_battery_devices);
2064         mutex_unlock(&bq27xxx_list_lock);
2065
2066         return 0;
2067 }
2068 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
2069
2070 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
2071 {
2072         mutex_lock(&bq27xxx_list_lock);
2073         list_del(&di->list);
2074         mutex_unlock(&bq27xxx_list_lock);
2075
2076         /* Set removed to avoid bq27xxx_battery_update() re-queuing the work */
2077         mutex_lock(&di->lock);
2078         di->removed = true;
2079         mutex_unlock(&di->lock);
2080
2081         cancel_delayed_work_sync(&di->work);
2082
2083         power_supply_unregister(di->bat);
2084         mutex_destroy(&di->lock);
2085 }
2086 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
2087
2088 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
2089 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
2090 MODULE_LICENSE("GPL");