linux/drivers/power/olpc_battery.c
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   1/*
   2 * Battery driver for One Laptop Per Child board.
   3 *
   4 *      Copyright © 2006-2010  David Woodhouse <dwmw2@infradead.org>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/module.h>
  13#include <linux/types.h>
  14#include <linux/err.h>
  15#include <linux/device.h>
  16#include <linux/platform_device.h>
  17#include <linux/power_supply.h>
  18#include <linux/jiffies.h>
  19#include <linux/sched.h>
  20#include <linux/olpc-ec.h>
  21#include <asm/olpc.h>
  22
  23
  24#define EC_BAT_VOLTAGE  0x10    /* uint16_t,    *9.76/32,    mV   */
  25#define EC_BAT_CURRENT  0x11    /* int16_t,     *15.625/120, mA   */
  26#define EC_BAT_ACR      0x12    /* int16_t,     *6250/15,    µAh  */
  27#define EC_BAT_TEMP     0x13    /* uint16_t,    *100/256,   °C  */
  28#define EC_AMB_TEMP     0x14    /* uint16_t,    *100/256,   °C  */
  29#define EC_BAT_STATUS   0x15    /* uint8_t,     bitmask */
  30#define EC_BAT_SOC      0x16    /* uint8_t,     percentage */
  31#define EC_BAT_SERIAL   0x17    /* uint8_t[6] */
  32#define EC_BAT_EEPROM   0x18    /* uint8_t adr as input, uint8_t output */
  33#define EC_BAT_ERRCODE  0x1f    /* uint8_t,     bitmask */
  34
  35#define BAT_STAT_PRESENT        0x01
  36#define BAT_STAT_FULL           0x02
  37#define BAT_STAT_LOW            0x04
  38#define BAT_STAT_DESTROY        0x08
  39#define BAT_STAT_AC             0x10
  40#define BAT_STAT_CHARGING       0x20
  41#define BAT_STAT_DISCHARGING    0x40
  42#define BAT_STAT_TRICKLE        0x80
  43
  44#define BAT_ERR_INFOFAIL        0x02
  45#define BAT_ERR_OVERVOLTAGE     0x04
  46#define BAT_ERR_OVERTEMP        0x05
  47#define BAT_ERR_GAUGESTOP       0x06
  48#define BAT_ERR_OUT_OF_CONTROL  0x07
  49#define BAT_ERR_ID_FAIL         0x09
  50#define BAT_ERR_ACR_FAIL        0x10
  51
  52#define BAT_ADDR_MFR_TYPE       0x5F
  53
  54/*********************************************************************
  55 *              Power
  56 *********************************************************************/
  57
  58static int olpc_ac_get_prop(struct power_supply *psy,
  59                            enum power_supply_property psp,
  60                            union power_supply_propval *val)
  61{
  62        int ret = 0;
  63        uint8_t status;
  64
  65        switch (psp) {
  66        case POWER_SUPPLY_PROP_ONLINE:
  67                ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
  68                if (ret)
  69                        return ret;
  70
  71                val->intval = !!(status & BAT_STAT_AC);
  72                break;
  73        default:
  74                ret = -EINVAL;
  75                break;
  76        }
  77        return ret;
  78}
  79
  80static enum power_supply_property olpc_ac_props[] = {
  81        POWER_SUPPLY_PROP_ONLINE,
  82};
  83
  84static struct power_supply olpc_ac = {
  85        .name = "olpc-ac",
  86        .type = POWER_SUPPLY_TYPE_MAINS,
  87        .properties = olpc_ac_props,
  88        .num_properties = ARRAY_SIZE(olpc_ac_props),
  89        .get_property = olpc_ac_get_prop,
  90};
  91
  92static char bat_serial[17]; /* Ick */
  93
  94static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte)
  95{
  96        if (olpc_platform_info.ecver > 0x44) {
  97                if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE))
  98                        val->intval = POWER_SUPPLY_STATUS_CHARGING;
  99                else if (ec_byte & BAT_STAT_DISCHARGING)
 100                        val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 101                else if (ec_byte & BAT_STAT_FULL)
 102                        val->intval = POWER_SUPPLY_STATUS_FULL;
 103                else /* er,... */
 104                        val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 105        } else {
 106                /* Older EC didn't report charge/discharge bits */
 107                if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */
 108                        val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 109                else if (ec_byte & BAT_STAT_FULL)
 110                        val->intval = POWER_SUPPLY_STATUS_FULL;
 111                else /* Not _necessarily_ true but EC doesn't tell all yet */
 112                        val->intval = POWER_SUPPLY_STATUS_CHARGING;
 113        }
 114
 115        return 0;
 116}
 117
 118static int olpc_bat_get_health(union power_supply_propval *val)
 119{
 120        uint8_t ec_byte;
 121        int ret;
 122
 123        ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
 124        if (ret)
 125                return ret;
 126
 127        switch (ec_byte) {
 128        case 0:
 129                val->intval = POWER_SUPPLY_HEALTH_GOOD;
 130                break;
 131
 132        case BAT_ERR_OVERTEMP:
 133                val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
 134                break;
 135
 136        case BAT_ERR_OVERVOLTAGE:
 137                val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 138                break;
 139
 140        case BAT_ERR_INFOFAIL:
 141        case BAT_ERR_OUT_OF_CONTROL:
 142        case BAT_ERR_ID_FAIL:
 143        case BAT_ERR_ACR_FAIL:
 144                val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 145                break;
 146
 147        default:
 148                /* Eep. We don't know this failure code */
 149                ret = -EIO;
 150        }
 151
 152        return ret;
 153}
 154
 155static int olpc_bat_get_mfr(union power_supply_propval *val)
 156{
 157        uint8_t ec_byte;
 158        int ret;
 159
 160        ec_byte = BAT_ADDR_MFR_TYPE;
 161        ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
 162        if (ret)
 163                return ret;
 164
 165        switch (ec_byte >> 4) {
 166        case 1:
 167                val->strval = "Gold Peak";
 168                break;
 169        case 2:
 170                val->strval = "BYD";
 171                break;
 172        default:
 173                val->strval = "Unknown";
 174                break;
 175        }
 176
 177        return ret;
 178}
 179
 180static int olpc_bat_get_tech(union power_supply_propval *val)
 181{
 182        uint8_t ec_byte;
 183        int ret;
 184
 185        ec_byte = BAT_ADDR_MFR_TYPE;
 186        ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
 187        if (ret)
 188                return ret;
 189
 190        switch (ec_byte & 0xf) {
 191        case 1:
 192                val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
 193                break;
 194        case 2:
 195                val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe;
 196                break;
 197        default:
 198                val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
 199                break;
 200        }
 201
 202        return ret;
 203}
 204
 205static int olpc_bat_get_charge_full_design(union power_supply_propval *val)
 206{
 207        uint8_t ec_byte;
 208        union power_supply_propval tech;
 209        int ret, mfr;
 210
 211        ret = olpc_bat_get_tech(&tech);
 212        if (ret)
 213                return ret;
 214
 215        ec_byte = BAT_ADDR_MFR_TYPE;
 216        ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
 217        if (ret)
 218                return ret;
 219
 220        mfr = ec_byte >> 4;
 221
 222        switch (tech.intval) {
 223        case POWER_SUPPLY_TECHNOLOGY_NiMH:
 224                switch (mfr) {
 225                case 1: /* Gold Peak */
 226                        val->intval = 3000000*.8;
 227                        break;
 228                default:
 229                        return -EIO;
 230                }
 231                break;
 232
 233        case POWER_SUPPLY_TECHNOLOGY_LiFe:
 234                switch (mfr) {
 235                case 1: /* Gold Peak, fall through */
 236                case 2: /* BYD */
 237                        val->intval = 2800000;
 238                        break;
 239                default:
 240                        return -EIO;
 241                }
 242                break;
 243
 244        default:
 245                return -EIO;
 246        }
 247
 248        return ret;
 249}
 250
 251static int olpc_bat_get_charge_now(union power_supply_propval *val)
 252{
 253        uint8_t soc;
 254        union power_supply_propval full;
 255        int ret;
 256
 257        ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &soc, 1);
 258        if (ret)
 259                return ret;
 260
 261        ret = olpc_bat_get_charge_full_design(&full);
 262        if (ret)
 263                return ret;
 264
 265        val->intval = soc * (full.intval / 100);
 266        return 0;
 267}
 268
 269static int olpc_bat_get_voltage_max_design(union power_supply_propval *val)
 270{
 271        uint8_t ec_byte;
 272        union power_supply_propval tech;
 273        int mfr;
 274        int ret;
 275
 276        ret = olpc_bat_get_tech(&tech);
 277        if (ret)
 278                return ret;
 279
 280        ec_byte = BAT_ADDR_MFR_TYPE;
 281        ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
 282        if (ret)
 283                return ret;
 284
 285        mfr = ec_byte >> 4;
 286
 287        switch (tech.intval) {
 288        case POWER_SUPPLY_TECHNOLOGY_NiMH:
 289                switch (mfr) {
 290                case 1: /* Gold Peak */
 291                        val->intval = 6000000;
 292                        break;
 293                default:
 294                        return -EIO;
 295                }
 296                break;
 297
 298        case POWER_SUPPLY_TECHNOLOGY_LiFe:
 299                switch (mfr) {
 300                case 1: /* Gold Peak */
 301                        val->intval = 6400000;
 302                        break;
 303                case 2: /* BYD */
 304                        val->intval = 6500000;
 305                        break;
 306                default:
 307                        return -EIO;
 308                }
 309                break;
 310
 311        default:
 312                return -EIO;
 313        }
 314
 315        return ret;
 316}
 317
 318/*********************************************************************
 319 *              Battery properties
 320 *********************************************************************/
 321static int olpc_bat_get_property(struct power_supply *psy,
 322                                 enum power_supply_property psp,
 323                                 union power_supply_propval *val)
 324{
 325        int ret = 0;
 326        __be16 ec_word;
 327        uint8_t ec_byte;
 328        __be64 ser_buf;
 329
 330        ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
 331        if (ret)
 332                return ret;
 333
 334        /* Theoretically there's a race here -- the battery could be
 335           removed immediately after we check whether it's present, and
 336           then we query for some other property of the now-absent battery.
 337           It doesn't matter though -- the EC will return the last-known
 338           information, and it's as if we just ran that _little_ bit faster
 339           and managed to read it out before the battery went away. */
 340        if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) &&
 341                        psp != POWER_SUPPLY_PROP_PRESENT)
 342                return -ENODEV;
 343
 344        switch (psp) {
 345        case POWER_SUPPLY_PROP_STATUS:
 346                ret = olpc_bat_get_status(val, ec_byte);
 347                if (ret)
 348                        return ret;
 349                break;
 350        case POWER_SUPPLY_PROP_CHARGE_TYPE:
 351                if (ec_byte & BAT_STAT_TRICKLE)
 352                        val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
 353                else if (ec_byte & BAT_STAT_CHARGING)
 354                        val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
 355                else
 356                        val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
 357                break;
 358        case POWER_SUPPLY_PROP_PRESENT:
 359                val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
 360                                            BAT_STAT_TRICKLE));
 361                break;
 362
 363        case POWER_SUPPLY_PROP_HEALTH:
 364                if (ec_byte & BAT_STAT_DESTROY)
 365                        val->intval = POWER_SUPPLY_HEALTH_DEAD;
 366                else {
 367                        ret = olpc_bat_get_health(val);
 368                        if (ret)
 369                                return ret;
 370                }
 371                break;
 372
 373        case POWER_SUPPLY_PROP_MANUFACTURER:
 374                ret = olpc_bat_get_mfr(val);
 375                if (ret)
 376                        return ret;
 377                break;
 378        case POWER_SUPPLY_PROP_TECHNOLOGY:
 379                ret = olpc_bat_get_tech(val);
 380                if (ret)
 381                        return ret;
 382                break;
 383        case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 384        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 385                ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
 386                if (ret)
 387                        return ret;
 388
 389                val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32;
 390                break;
 391        case POWER_SUPPLY_PROP_CURRENT_AVG:
 392        case POWER_SUPPLY_PROP_CURRENT_NOW:
 393                ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
 394                if (ret)
 395                        return ret;
 396
 397                val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120;
 398                break;
 399        case POWER_SUPPLY_PROP_CAPACITY:
 400                ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
 401                if (ret)
 402                        return ret;
 403                val->intval = ec_byte;
 404                break;
 405        case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
 406                if (ec_byte & BAT_STAT_FULL)
 407                        val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
 408                else if (ec_byte & BAT_STAT_LOW)
 409                        val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 410                else
 411                        val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 412                break;
 413        case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 414                ret = olpc_bat_get_charge_full_design(val);
 415                if (ret)
 416                        return ret;
 417                break;
 418        case POWER_SUPPLY_PROP_CHARGE_NOW:
 419                ret = olpc_bat_get_charge_now(val);
 420                if (ret)
 421                        return ret;
 422                break;
 423        case POWER_SUPPLY_PROP_TEMP:
 424                ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
 425                if (ret)
 426                        return ret;
 427
 428                val->intval = (s16)be16_to_cpu(ec_word) * 100 / 256;
 429                break;
 430        case POWER_SUPPLY_PROP_TEMP_AMBIENT:
 431                ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
 432                if (ret)
 433                        return ret;
 434
 435                val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
 436                break;
 437        case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 438                ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
 439                if (ret)
 440                        return ret;
 441
 442                val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15;
 443                break;
 444        case POWER_SUPPLY_PROP_SERIAL_NUMBER:
 445                ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
 446                if (ret)
 447                        return ret;
 448
 449                sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
 450                val->strval = bat_serial;
 451                break;
 452        case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 453                ret = olpc_bat_get_voltage_max_design(val);
 454                if (ret)
 455                        return ret;
 456                break;
 457        default:
 458                ret = -EINVAL;
 459                break;
 460        }
 461
 462        return ret;
 463}
 464
 465static enum power_supply_property olpc_xo1_bat_props[] = {
 466        POWER_SUPPLY_PROP_STATUS,
 467        POWER_SUPPLY_PROP_CHARGE_TYPE,
 468        POWER_SUPPLY_PROP_PRESENT,
 469        POWER_SUPPLY_PROP_HEALTH,
 470        POWER_SUPPLY_PROP_TECHNOLOGY,
 471        POWER_SUPPLY_PROP_VOLTAGE_AVG,
 472        POWER_SUPPLY_PROP_VOLTAGE_NOW,
 473        POWER_SUPPLY_PROP_CURRENT_AVG,
 474        POWER_SUPPLY_PROP_CURRENT_NOW,
 475        POWER_SUPPLY_PROP_CAPACITY,
 476        POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 477        POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 478        POWER_SUPPLY_PROP_CHARGE_NOW,
 479        POWER_SUPPLY_PROP_TEMP,
 480        POWER_SUPPLY_PROP_TEMP_AMBIENT,
 481        POWER_SUPPLY_PROP_MANUFACTURER,
 482        POWER_SUPPLY_PROP_SERIAL_NUMBER,
 483        POWER_SUPPLY_PROP_CHARGE_COUNTER,
 484        POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 485};
 486
 487/* XO-1.5 does not have ambient temperature property */
 488static enum power_supply_property olpc_xo15_bat_props[] = {
 489        POWER_SUPPLY_PROP_STATUS,
 490        POWER_SUPPLY_PROP_CHARGE_TYPE,
 491        POWER_SUPPLY_PROP_PRESENT,
 492        POWER_SUPPLY_PROP_HEALTH,
 493        POWER_SUPPLY_PROP_TECHNOLOGY,
 494        POWER_SUPPLY_PROP_VOLTAGE_AVG,
 495        POWER_SUPPLY_PROP_VOLTAGE_NOW,
 496        POWER_SUPPLY_PROP_CURRENT_AVG,
 497        POWER_SUPPLY_PROP_CURRENT_NOW,
 498        POWER_SUPPLY_PROP_CAPACITY,
 499        POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 500        POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 501        POWER_SUPPLY_PROP_CHARGE_NOW,
 502        POWER_SUPPLY_PROP_TEMP,
 503        POWER_SUPPLY_PROP_MANUFACTURER,
 504        POWER_SUPPLY_PROP_SERIAL_NUMBER,
 505        POWER_SUPPLY_PROP_CHARGE_COUNTER,
 506        POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 507};
 508
 509/* EEPROM reading goes completely around the power_supply API, sadly */
 510
 511#define EEPROM_START    0x20
 512#define EEPROM_END      0x80
 513#define EEPROM_SIZE     (EEPROM_END - EEPROM_START)
 514
 515static ssize_t olpc_bat_eeprom_read(struct file *filp, struct kobject *kobj,
 516                struct bin_attribute *attr, char *buf, loff_t off, size_t count)
 517{
 518        uint8_t ec_byte;
 519        int ret;
 520        int i;
 521
 522        if (off >= EEPROM_SIZE)
 523                return 0;
 524        if (off + count > EEPROM_SIZE)
 525                count = EEPROM_SIZE - off;
 526
 527        for (i = 0; i < count; i++) {
 528                ec_byte = EEPROM_START + off + i;
 529                ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1);
 530                if (ret) {
 531                        pr_err("olpc-battery: "
 532                               "EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n",
 533                               ec_byte, ret);
 534                        return -EIO;
 535                }
 536        }
 537
 538        return count;
 539}
 540
 541static struct bin_attribute olpc_bat_eeprom = {
 542        .attr = {
 543                .name = "eeprom",
 544                .mode = S_IRUGO,
 545        },
 546        .size = 0,
 547        .read = olpc_bat_eeprom_read,
 548};
 549
 550/* Allow userspace to see the specific error value pulled from the EC */
 551
 552static ssize_t olpc_bat_error_read(struct device *dev,
 553                struct device_attribute *attr, char *buf)
 554{
 555        uint8_t ec_byte;
 556        ssize_t ret;
 557
 558        ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
 559        if (ret < 0)
 560                return ret;
 561
 562        return sprintf(buf, "%d\n", ec_byte);
 563}
 564
 565static struct device_attribute olpc_bat_error = {
 566        .attr = {
 567                .name = "error",
 568                .mode = S_IRUGO,
 569        },
 570        .show = olpc_bat_error_read,
 571};
 572
 573/*********************************************************************
 574 *              Initialisation
 575 *********************************************************************/
 576
 577static struct power_supply olpc_bat = {
 578        .name = "olpc-battery",
 579        .get_property = olpc_bat_get_property,
 580        .use_for_apm = 1,
 581};
 582
 583static int olpc_battery_suspend(struct platform_device *pdev,
 584                                pm_message_t state)
 585{
 586        if (device_may_wakeup(olpc_ac.dev))
 587                olpc_ec_wakeup_set(EC_SCI_SRC_ACPWR);
 588        else
 589                olpc_ec_wakeup_clear(EC_SCI_SRC_ACPWR);
 590
 591        if (device_may_wakeup(olpc_bat.dev))
 592                olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
 593                                   | EC_SCI_SRC_BATERR);
 594        else
 595                olpc_ec_wakeup_clear(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
 596                                     | EC_SCI_SRC_BATERR);
 597
 598        return 0;
 599}
 600
 601static int __devinit olpc_battery_probe(struct platform_device *pdev)
 602{
 603        int ret;
 604        uint8_t status;
 605
 606        /*
 607         * We've seen a number of EC protocol changes; this driver requires
 608         * the latest EC protocol, supported by 0x44 and above.
 609         */
 610        if (olpc_platform_info.ecver < 0x44) {
 611                printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
 612                        "battery driver.\n", olpc_platform_info.ecver);
 613                return -ENXIO;
 614        }
 615
 616        ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
 617        if (ret)
 618                return ret;
 619
 620        /* Ignore the status. It doesn't actually matter */
 621
 622        ret = power_supply_register(&pdev->dev, &olpc_ac);
 623        if (ret)
 624                return ret;
 625
 626        if (olpc_board_at_least(olpc_board_pre(0xd0))) { /* XO-1.5 */
 627                olpc_bat.properties = olpc_xo15_bat_props;
 628                olpc_bat.num_properties = ARRAY_SIZE(olpc_xo15_bat_props);
 629        } else { /* XO-1 */
 630                olpc_bat.properties = olpc_xo1_bat_props;
 631                olpc_bat.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
 632        }
 633
 634        ret = power_supply_register(&pdev->dev, &olpc_bat);
 635        if (ret)
 636                goto battery_failed;
 637
 638        ret = device_create_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
 639        if (ret)
 640                goto eeprom_failed;
 641
 642        ret = device_create_file(olpc_bat.dev, &olpc_bat_error);
 643        if (ret)
 644                goto error_failed;
 645
 646        if (olpc_ec_wakeup_available()) {
 647                device_set_wakeup_capable(olpc_ac.dev, true);
 648                device_set_wakeup_capable(olpc_bat.dev, true);
 649        }
 650
 651        return 0;
 652
 653error_failed:
 654        device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
 655eeprom_failed:
 656        power_supply_unregister(&olpc_bat);
 657battery_failed:
 658        power_supply_unregister(&olpc_ac);
 659        return ret;
 660}
 661
 662static int __devexit olpc_battery_remove(struct platform_device *pdev)
 663{
 664        device_remove_file(olpc_bat.dev, &olpc_bat_error);
 665        device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
 666        power_supply_unregister(&olpc_bat);
 667        power_supply_unregister(&olpc_ac);
 668        return 0;
 669}
 670
 671static const struct of_device_id olpc_battery_ids[] __devinitconst = {
 672        { .compatible = "olpc,xo1-battery" },
 673        {}
 674};
 675MODULE_DEVICE_TABLE(of, olpc_battery_ids);
 676
 677static struct platform_driver olpc_battery_driver = {
 678        .driver = {
 679                .name = "olpc-battery",
 680                .owner = THIS_MODULE,
 681                .of_match_table = olpc_battery_ids,
 682        },
 683        .probe = olpc_battery_probe,
 684        .remove = __devexit_p(olpc_battery_remove),
 685        .suspend = olpc_battery_suspend,
 686};
 687
 688module_platform_driver(olpc_battery_driver);
 689
 690MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 691MODULE_LICENSE("GPL");
 692MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine");
 693
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