1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) ST-Ericsson AB 2012 4 * 5 * Main and Back-up battery management driver. 6 * 7 * Note: Backup battery management is required in case of Li-Ion battery and not 8 * for capacitive battery. HREF boards have capacitive battery and hence backup 9 * battery management is not used and the supported code is available in this 10 * driver. 11 * 12 * Author: 13 * Johan Palsson <johan.palsson@stericsson.com> 14 * Karl Komierowski <karl.komierowski@stericsson.com> 15 * Arun R Murthy <arun.murthy@stericsson.com> 16 */ 17 18 #include <linux/init.h> 19 #include <linux/module.h> 20 #include <linux/component.h> 21 #include <linux/device.h> 22 #include <linux/interrupt.h> 23 #include <linux/platform_device.h> 24 #include <linux/power_supply.h> 25 #include <linux/kobject.h> 26 #include <linux/slab.h> 27 #include <linux/delay.h> 28 #include <linux/time.h> 29 #include <linux/time64.h> 30 #include <linux/of.h> 31 #include <linux/completion.h> 32 #include <linux/mfd/core.h> 33 #include <linux/mfd/abx500.h> 34 #include <linux/mfd/abx500/ab8500.h> 35 #include <linux/iio/consumer.h> 36 #include <linux/kernel.h> 37 #include <linux/fixp-arith.h> 38 39 #include "ab8500-bm.h" 40 41 #define FG_LSB_IN_MA 1627 42 #define QLSB_NANO_AMP_HOURS_X10 1071 43 #define INS_CURR_TIMEOUT (3 * HZ) 44 45 #define SEC_TO_SAMPLE(S) (S * 4) 46 47 #define NBR_AVG_SAMPLES 20 48 #define WAIT_FOR_INST_CURRENT_MAX 70 49 /* Currents higher than -500mA (dissipating) will make compensation unstable */ 50 #define IGNORE_VBAT_HIGHCUR -500000 51 52 #define LOW_BAT_CHECK_INTERVAL (HZ / 16) /* 62.5 ms */ 53 54 #define VALID_CAPACITY_SEC (45 * 60) /* 45 minutes */ 55 #define BATT_OK_MIN 2360 /* mV */ 56 #define BATT_OK_INCREMENT 50 /* mV */ 57 #define BATT_OK_MAX_NR_INCREMENTS 0xE 58 59 /* FG constants */ 60 #define BATT_OVV 0x01 61 62 /** 63 * struct ab8500_fg_interrupts - ab8500 fg interrupts 64 * @name: name of the interrupt 65 * @isr function pointer to the isr 66 */ 67 struct ab8500_fg_interrupts { 68 char *name; 69 irqreturn_t (*isr)(int irq, void *data); 70 }; 71 72 enum ab8500_fg_discharge_state { 73 AB8500_FG_DISCHARGE_INIT, 74 AB8500_FG_DISCHARGE_INITMEASURING, 75 AB8500_FG_DISCHARGE_INIT_RECOVERY, 76 AB8500_FG_DISCHARGE_RECOVERY, 77 AB8500_FG_DISCHARGE_READOUT_INIT, 78 AB8500_FG_DISCHARGE_READOUT, 79 AB8500_FG_DISCHARGE_WAKEUP, 80 }; 81 82 static char *discharge_state[] = { 83 "DISCHARGE_INIT", 84 "DISCHARGE_INITMEASURING", 85 "DISCHARGE_INIT_RECOVERY", 86 "DISCHARGE_RECOVERY", 87 "DISCHARGE_READOUT_INIT", 88 "DISCHARGE_READOUT", 89 "DISCHARGE_WAKEUP", 90 }; 91 92 enum ab8500_fg_charge_state { 93 AB8500_FG_CHARGE_INIT, 94 AB8500_FG_CHARGE_READOUT, 95 }; 96 97 static char *charge_state[] = { 98 "CHARGE_INIT", 99 "CHARGE_READOUT", 100 }; 101 102 enum ab8500_fg_calibration_state { 103 AB8500_FG_CALIB_INIT, 104 AB8500_FG_CALIB_WAIT, 105 AB8500_FG_CALIB_END, 106 }; 107 108 struct ab8500_fg_avg_cap { 109 int avg; 110 int samples[NBR_AVG_SAMPLES]; 111 time64_t time_stamps[NBR_AVG_SAMPLES]; 112 int pos; 113 int nbr_samples; 114 int sum; 115 }; 116 117 struct ab8500_fg_cap_scaling { 118 bool enable; 119 int cap_to_scale[2]; 120 int disable_cap_level; 121 int scaled_cap; 122 }; 123 124 struct ab8500_fg_battery_capacity { 125 int max_mah_design; 126 int max_mah; 127 int mah; 128 int permille; 129 int level; 130 int prev_mah; 131 int prev_percent; 132 int prev_level; 133 int user_mah; 134 struct ab8500_fg_cap_scaling cap_scale; 135 }; 136 137 struct ab8500_fg_flags { 138 bool fg_enabled; 139 bool conv_done; 140 bool charging; 141 bool fully_charged; 142 bool force_full; 143 bool low_bat_delay; 144 bool low_bat; 145 bool bat_ovv; 146 bool batt_unknown; 147 bool calibrate; 148 bool user_cap; 149 bool batt_id_received; 150 }; 151 152 struct inst_curr_result_list { 153 struct list_head list; 154 int *result; 155 }; 156 157 /** 158 * struct ab8500_fg - ab8500 FG device information 159 * @dev: Pointer to the structure device 160 * @node: a list of AB8500 FGs, hence prepared for reentrance 161 * @irq holds the CCEOC interrupt number 162 * @vbat_uv: Battery voltage in uV 163 * @vbat_nom_uv: Nominal battery voltage in uV 164 * @inst_curr_ua: Instantenous battery current in uA 165 * @avg_curr_ua: Average battery current in uA 166 * @bat_temp battery temperature 167 * @fg_samples: Number of samples used in the FG accumulation 168 * @accu_charge: Accumulated charge from the last conversion 169 * @recovery_cnt: Counter for recovery mode 170 * @high_curr_cnt: Counter for high current mode 171 * @init_cnt: Counter for init mode 172 * @low_bat_cnt Counter for number of consecutive low battery measures 173 * @nbr_cceoc_irq_cnt Counter for number of CCEOC irqs received since enabled 174 * @recovery_needed: Indicate if recovery is needed 175 * @high_curr_mode: Indicate if we're in high current mode 176 * @init_capacity: Indicate if initial capacity measuring should be done 177 * @turn_off_fg: True if fg was off before current measurement 178 * @calib_state State during offset calibration 179 * @discharge_state: Current discharge state 180 * @charge_state: Current charge state 181 * @ab8500_fg_started Completion struct used for the instant current start 182 * @ab8500_fg_complete Completion struct used for the instant current reading 183 * @flags: Structure for information about events triggered 184 * @bat_cap: Structure for battery capacity specific parameters 185 * @avg_cap: Average capacity filter 186 * @parent: Pointer to the struct ab8500 187 * @main_bat_v: ADC channel for the main battery voltage 188 * @bm: Platform specific battery management information 189 * @fg_psy: Structure that holds the FG specific battery properties 190 * @fg_wq: Work queue for running the FG algorithm 191 * @fg_periodic_work: Work to run the FG algorithm periodically 192 * @fg_low_bat_work: Work to check low bat condition 193 * @fg_reinit_work Work used to reset and reinitialise the FG algorithm 194 * @fg_work: Work to run the FG algorithm instantly 195 * @fg_acc_cur_work: Work to read the FG accumulator 196 * @fg_check_hw_failure_work: Work for checking HW state 197 * @cc_lock: Mutex for locking the CC 198 * @fg_kobject: Structure of type kobject 199 */ 200 struct ab8500_fg { 201 struct device *dev; 202 struct list_head node; 203 int irq; 204 int vbat_uv; 205 int vbat_nom_uv; 206 int inst_curr_ua; 207 int avg_curr_ua; 208 int bat_temp; 209 int fg_samples; 210 int accu_charge; 211 int recovery_cnt; 212 int high_curr_cnt; 213 int init_cnt; 214 int low_bat_cnt; 215 int nbr_cceoc_irq_cnt; 216 u32 line_impedance_uohm; 217 bool recovery_needed; 218 bool high_curr_mode; 219 bool init_capacity; 220 bool turn_off_fg; 221 enum ab8500_fg_calibration_state calib_state; 222 enum ab8500_fg_discharge_state discharge_state; 223 enum ab8500_fg_charge_state charge_state; 224 struct completion ab8500_fg_started; 225 struct completion ab8500_fg_complete; 226 struct ab8500_fg_flags flags; 227 struct ab8500_fg_battery_capacity bat_cap; 228 struct ab8500_fg_avg_cap avg_cap; 229 struct ab8500 *parent; 230 struct iio_channel *main_bat_v; 231 struct ab8500_bm_data *bm; 232 struct power_supply *fg_psy; 233 struct workqueue_struct *fg_wq; 234 struct delayed_work fg_periodic_work; 235 struct delayed_work fg_low_bat_work; 236 struct delayed_work fg_reinit_work; 237 struct work_struct fg_work; 238 struct work_struct fg_acc_cur_work; 239 struct delayed_work fg_check_hw_failure_work; 240 struct mutex cc_lock; 241 struct kobject fg_kobject; 242 }; 243 static LIST_HEAD(ab8500_fg_list); 244 245 /** 246 * ab8500_fg_get() - returns a reference to the primary AB8500 fuel gauge 247 * (i.e. the first fuel gauge in the instance list) 248 */ 249 struct ab8500_fg *ab8500_fg_get(void) 250 { 251 return list_first_entry_or_null(&ab8500_fg_list, struct ab8500_fg, 252 node); 253 } 254 255 /* Main battery properties */ 256 static enum power_supply_property ab8500_fg_props[] = { 257 POWER_SUPPLY_PROP_VOLTAGE_NOW, 258 POWER_SUPPLY_PROP_CURRENT_NOW, 259 POWER_SUPPLY_PROP_CURRENT_AVG, 260 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 261 POWER_SUPPLY_PROP_ENERGY_FULL, 262 POWER_SUPPLY_PROP_ENERGY_NOW, 263 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 264 POWER_SUPPLY_PROP_CHARGE_FULL, 265 POWER_SUPPLY_PROP_CHARGE_NOW, 266 POWER_SUPPLY_PROP_CAPACITY, 267 POWER_SUPPLY_PROP_CAPACITY_LEVEL, 268 }; 269 270 /* 271 * This array maps the raw hex value to lowbat voltage used by the AB8500 272 * Values taken from the UM0836, in microvolts. 273 */ 274 static int ab8500_fg_lowbat_voltage_map[] = { 275 2300000, 276 2325000, 277 2350000, 278 2375000, 279 2400000, 280 2425000, 281 2450000, 282 2475000, 283 2500000, 284 2525000, 285 2550000, 286 2575000, 287 2600000, 288 2625000, 289 2650000, 290 2675000, 291 2700000, 292 2725000, 293 2750000, 294 2775000, 295 2800000, 296 2825000, 297 2850000, 298 2875000, 299 2900000, 300 2925000, 301 2950000, 302 2975000, 303 3000000, 304 3025000, 305 3050000, 306 3075000, 307 3100000, 308 3125000, 309 3150000, 310 3175000, 311 3200000, 312 3225000, 313 3250000, 314 3275000, 315 3300000, 316 3325000, 317 3350000, 318 3375000, 319 3400000, 320 3425000, 321 3450000, 322 3475000, 323 3500000, 324 3525000, 325 3550000, 326 3575000, 327 3600000, 328 3625000, 329 3650000, 330 3675000, 331 3700000, 332 3725000, 333 3750000, 334 3775000, 335 3800000, 336 3825000, 337 3850000, 338 3850000, 339 }; 340 341 static u8 ab8500_volt_to_regval(int voltage_uv) 342 { 343 int i; 344 345 if (voltage_uv < ab8500_fg_lowbat_voltage_map[0]) 346 return 0; 347 348 for (i = 0; i < ARRAY_SIZE(ab8500_fg_lowbat_voltage_map); i++) { 349 if (voltage_uv < ab8500_fg_lowbat_voltage_map[i]) 350 return (u8) i - 1; 351 } 352 353 /* If not captured above, return index of last element */ 354 return (u8) ARRAY_SIZE(ab8500_fg_lowbat_voltage_map) - 1; 355 } 356 357 /** 358 * ab8500_fg_is_low_curr() - Low or high current mode 359 * @di: pointer to the ab8500_fg structure 360 * @curr_ua: the current to base or our decision on in microampere 361 * 362 * Low current mode if the current consumption is below a certain threshold 363 */ 364 static int ab8500_fg_is_low_curr(struct ab8500_fg *di, int curr_ua) 365 { 366 /* 367 * We want to know if we're in low current mode 368 */ 369 if (curr_ua > -di->bm->fg_params->high_curr_threshold_ua) 370 return true; 371 else 372 return false; 373 } 374 375 /** 376 * ab8500_fg_add_cap_sample() - Add capacity to average filter 377 * @di: pointer to the ab8500_fg structure 378 * @sample: the capacity in mAh to add to the filter 379 * 380 * A capacity is added to the filter and a new mean capacity is calculated and 381 * returned 382 */ 383 static int ab8500_fg_add_cap_sample(struct ab8500_fg *di, int sample) 384 { 385 time64_t now = ktime_get_boottime_seconds(); 386 struct ab8500_fg_avg_cap *avg = &di->avg_cap; 387 388 do { 389 avg->sum += sample - avg->samples[avg->pos]; 390 avg->samples[avg->pos] = sample; 391 avg->time_stamps[avg->pos] = now; 392 avg->pos++; 393 394 if (avg->pos == NBR_AVG_SAMPLES) 395 avg->pos = 0; 396 397 if (avg->nbr_samples < NBR_AVG_SAMPLES) 398 avg->nbr_samples++; 399 400 /* 401 * Check the time stamp for each sample. If too old, 402 * replace with latest sample 403 */ 404 } while (now - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]); 405 406 avg->avg = avg->sum / avg->nbr_samples; 407 408 return avg->avg; 409 } 410 411 /** 412 * ab8500_fg_clear_cap_samples() - Clear average filter 413 * @di: pointer to the ab8500_fg structure 414 * 415 * The capacity filter is reset to zero. 416 */ 417 static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di) 418 { 419 int i; 420 struct ab8500_fg_avg_cap *avg = &di->avg_cap; 421 422 avg->pos = 0; 423 avg->nbr_samples = 0; 424 avg->sum = 0; 425 avg->avg = 0; 426 427 for (i = 0; i < NBR_AVG_SAMPLES; i++) { 428 avg->samples[i] = 0; 429 avg->time_stamps[i] = 0; 430 } 431 } 432 433 /** 434 * ab8500_fg_fill_cap_sample() - Fill average filter 435 * @di: pointer to the ab8500_fg structure 436 * @sample: the capacity in mAh to fill the filter with 437 * 438 * The capacity filter is filled with a capacity in mAh 439 */ 440 static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample) 441 { 442 int i; 443 time64_t now; 444 struct ab8500_fg_avg_cap *avg = &di->avg_cap; 445 446 now = ktime_get_boottime_seconds(); 447 448 for (i = 0; i < NBR_AVG_SAMPLES; i++) { 449 avg->samples[i] = sample; 450 avg->time_stamps[i] = now; 451 } 452 453 avg->pos = 0; 454 avg->nbr_samples = NBR_AVG_SAMPLES; 455 avg->sum = sample * NBR_AVG_SAMPLES; 456 avg->avg = sample; 457 } 458 459 /** 460 * ab8500_fg_coulomb_counter() - enable coulomb counter 461 * @di: pointer to the ab8500_fg structure 462 * @enable: enable/disable 463 * 464 * Enable/Disable coulomb counter. 465 * On failure returns negative value. 466 */ 467 static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable) 468 { 469 int ret = 0; 470 mutex_lock(&di->cc_lock); 471 if (enable) { 472 /* To be able to reprogram the number of samples, we have to 473 * first stop the CC and then enable it again */ 474 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 475 AB8500_RTC_CC_CONF_REG, 0x00); 476 if (ret) 477 goto cc_err; 478 479 /* Program the samples */ 480 ret = abx500_set_register_interruptible(di->dev, 481 AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, 482 di->fg_samples); 483 if (ret) 484 goto cc_err; 485 486 /* Start the CC */ 487 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 488 AB8500_RTC_CC_CONF_REG, 489 (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); 490 if (ret) 491 goto cc_err; 492 493 di->flags.fg_enabled = true; 494 } else { 495 /* Clear any pending read requests */ 496 ret = abx500_mask_and_set_register_interruptible(di->dev, 497 AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 498 (RESET_ACCU | READ_REQ), 0); 499 if (ret) 500 goto cc_err; 501 502 ret = abx500_set_register_interruptible(di->dev, 503 AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, 0); 504 if (ret) 505 goto cc_err; 506 507 /* Stop the CC */ 508 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 509 AB8500_RTC_CC_CONF_REG, 0); 510 if (ret) 511 goto cc_err; 512 513 di->flags.fg_enabled = false; 514 515 } 516 dev_dbg(di->dev, " CC enabled: %d Samples: %d\n", 517 enable, di->fg_samples); 518 519 mutex_unlock(&di->cc_lock); 520 521 return ret; 522 cc_err: 523 dev_err(di->dev, "%s Enabling coulomb counter failed\n", __func__); 524 mutex_unlock(&di->cc_lock); 525 return ret; 526 } 527 528 /** 529 * ab8500_fg_inst_curr_start() - start battery instantaneous current 530 * @di: pointer to the ab8500_fg structure 531 * 532 * Returns 0 or error code 533 * Note: This is part "one" and has to be called before 534 * ab8500_fg_inst_curr_finalize() 535 */ 536 int ab8500_fg_inst_curr_start(struct ab8500_fg *di) 537 { 538 u8 reg_val; 539 int ret; 540 541 mutex_lock(&di->cc_lock); 542 543 di->nbr_cceoc_irq_cnt = 0; 544 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 545 AB8500_RTC_CC_CONF_REG, ®_val); 546 if (ret < 0) 547 goto fail; 548 549 if (!(reg_val & CC_PWR_UP_ENA)) { 550 dev_dbg(di->dev, "%s Enable FG\n", __func__); 551 di->turn_off_fg = true; 552 553 /* Program the samples */ 554 ret = abx500_set_register_interruptible(di->dev, 555 AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU, 556 SEC_TO_SAMPLE(10)); 557 if (ret) 558 goto fail; 559 560 /* Start the CC */ 561 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 562 AB8500_RTC_CC_CONF_REG, 563 (CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA)); 564 if (ret) 565 goto fail; 566 } else { 567 di->turn_off_fg = false; 568 } 569 570 /* Return and WFI */ 571 reinit_completion(&di->ab8500_fg_started); 572 reinit_completion(&di->ab8500_fg_complete); 573 enable_irq(di->irq); 574 575 /* Note: cc_lock is still locked */ 576 return 0; 577 fail: 578 mutex_unlock(&di->cc_lock); 579 return ret; 580 } 581 582 /** 583 * ab8500_fg_inst_curr_started() - check if fg conversion has started 584 * @di: pointer to the ab8500_fg structure 585 * 586 * Returns 1 if conversion started, 0 if still waiting 587 */ 588 int ab8500_fg_inst_curr_started(struct ab8500_fg *di) 589 { 590 return completion_done(&di->ab8500_fg_started); 591 } 592 593 /** 594 * ab8500_fg_inst_curr_done() - check if fg conversion is done 595 * @di: pointer to the ab8500_fg structure 596 * 597 * Returns 1 if conversion done, 0 if still waiting 598 */ 599 int ab8500_fg_inst_curr_done(struct ab8500_fg *di) 600 { 601 return completion_done(&di->ab8500_fg_complete); 602 } 603 604 /** 605 * ab8500_fg_inst_curr_finalize() - battery instantaneous current 606 * @di: pointer to the ab8500_fg structure 607 * @curr_ua: battery instantenous current in microampere (on success) 608 * 609 * Returns 0 or an error code 610 * Note: This is part "two" and has to be called at earliest 250 ms 611 * after ab8500_fg_inst_curr_start() 612 */ 613 int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *curr_ua) 614 { 615 u8 low, high; 616 int val; 617 int ret; 618 unsigned long timeout; 619 620 if (!completion_done(&di->ab8500_fg_complete)) { 621 timeout = wait_for_completion_timeout( 622 &di->ab8500_fg_complete, 623 INS_CURR_TIMEOUT); 624 dev_dbg(di->dev, "Finalize time: %d ms\n", 625 jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); 626 if (!timeout) { 627 ret = -ETIME; 628 disable_irq(di->irq); 629 di->nbr_cceoc_irq_cnt = 0; 630 dev_err(di->dev, "completion timed out [%d]\n", 631 __LINE__); 632 goto fail; 633 } 634 } 635 636 disable_irq(di->irq); 637 di->nbr_cceoc_irq_cnt = 0; 638 639 ret = abx500_mask_and_set_register_interruptible(di->dev, 640 AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 641 READ_REQ, READ_REQ); 642 643 /* 100uS between read request and read is needed */ 644 usleep_range(100, 100); 645 646 /* Read CC Sample conversion value Low and high */ 647 ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, 648 AB8500_GASG_CC_SMPL_CNVL_REG, &low); 649 if (ret < 0) 650 goto fail; 651 652 ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, 653 AB8500_GASG_CC_SMPL_CNVH_REG, &high); 654 if (ret < 0) 655 goto fail; 656 657 /* 658 * negative value for Discharging 659 * convert 2's complement into decimal 660 */ 661 if (high & 0x10) 662 val = (low | (high << 8) | 0xFFFFE000); 663 else 664 val = (low | (high << 8)); 665 666 /* 667 * Convert to unit value in mA 668 * Full scale input voltage is 669 * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542.000 uA 670 * Given a 250ms conversion cycle time the LSB corresponds 671 * to 107.1 nAh. Convert to current by dividing by the conversion 672 * time in hours (250ms = 1 / (3600 * 4)h) 673 * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm 674 */ 675 val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / di->bm->fg_res; 676 677 if (di->turn_off_fg) { 678 dev_dbg(di->dev, "%s Disable FG\n", __func__); 679 680 /* Clear any pending read requests */ 681 ret = abx500_set_register_interruptible(di->dev, 682 AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 0); 683 if (ret) 684 goto fail; 685 686 /* Stop the CC */ 687 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 688 AB8500_RTC_CC_CONF_REG, 0); 689 if (ret) 690 goto fail; 691 } 692 mutex_unlock(&di->cc_lock); 693 *curr_ua = val; 694 695 return 0; 696 fail: 697 mutex_unlock(&di->cc_lock); 698 return ret; 699 } 700 701 /** 702 * ab8500_fg_inst_curr_blocking() - battery instantaneous current 703 * @di: pointer to the ab8500_fg structure 704 * 705 * Returns battery instantenous current in microampere (on success) 706 * else error code 707 */ 708 int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di) 709 { 710 int ret; 711 unsigned long timeout; 712 int curr_ua = 0; 713 714 ret = ab8500_fg_inst_curr_start(di); 715 if (ret) { 716 dev_err(di->dev, "Failed to initialize fg_inst\n"); 717 return 0; 718 } 719 720 /* Wait for CC to actually start */ 721 if (!completion_done(&di->ab8500_fg_started)) { 722 timeout = wait_for_completion_timeout( 723 &di->ab8500_fg_started, 724 INS_CURR_TIMEOUT); 725 dev_dbg(di->dev, "Start time: %d ms\n", 726 jiffies_to_msecs(INS_CURR_TIMEOUT - timeout)); 727 if (!timeout) { 728 ret = -ETIME; 729 dev_err(di->dev, "completion timed out [%d]\n", 730 __LINE__); 731 goto fail; 732 } 733 } 734 735 ret = ab8500_fg_inst_curr_finalize(di, &curr_ua); 736 if (ret) { 737 dev_err(di->dev, "Failed to finalize fg_inst\n"); 738 return 0; 739 } 740 741 dev_dbg(di->dev, "%s instant current: %d uA", __func__, curr_ua); 742 return curr_ua; 743 fail: 744 disable_irq(di->irq); 745 mutex_unlock(&di->cc_lock); 746 return ret; 747 } 748 749 /** 750 * ab8500_fg_acc_cur_work() - average battery current 751 * @work: pointer to the work_struct structure 752 * 753 * Updated the average battery current obtained from the 754 * coulomb counter. 755 */ 756 static void ab8500_fg_acc_cur_work(struct work_struct *work) 757 { 758 int val; 759 int ret; 760 u8 low, med, high; 761 762 struct ab8500_fg *di = container_of(work, 763 struct ab8500_fg, fg_acc_cur_work); 764 765 mutex_lock(&di->cc_lock); 766 ret = abx500_set_register_interruptible(di->dev, AB8500_GAS_GAUGE, 767 AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ); 768 if (ret) 769 goto exit; 770 771 ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, 772 AB8500_GASG_CC_NCOV_ACCU_LOW, &low); 773 if (ret < 0) 774 goto exit; 775 776 ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, 777 AB8500_GASG_CC_NCOV_ACCU_MED, &med); 778 if (ret < 0) 779 goto exit; 780 781 ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE, 782 AB8500_GASG_CC_NCOV_ACCU_HIGH, &high); 783 if (ret < 0) 784 goto exit; 785 786 /* Check for sign bit in case of negative value, 2's complement */ 787 if (high & 0x10) 788 val = (low | (med << 8) | (high << 16) | 0xFFE00000); 789 else 790 val = (low | (med << 8) | (high << 16)); 791 792 /* 793 * Convert to uAh 794 * Given a 250ms conversion cycle time the LSB corresponds 795 * to 112.9 nAh. 796 * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm 797 */ 798 di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) / 799 (100 * di->bm->fg_res); 800 801 /* 802 * Convert to unit value in uA 803 * by dividing by the conversion 804 * time in hours (= samples / (3600 * 4)h) 805 */ 806 di->avg_curr_ua = (val * QLSB_NANO_AMP_HOURS_X10 * 36) / 807 (di->bm->fg_res * (di->fg_samples / 4)); 808 809 di->flags.conv_done = true; 810 811 mutex_unlock(&di->cc_lock); 812 813 queue_work(di->fg_wq, &di->fg_work); 814 815 dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n", 816 di->bm->fg_res, di->fg_samples, val, di->accu_charge); 817 return; 818 exit: 819 dev_err(di->dev, 820 "Failed to read or write gas gauge registers\n"); 821 mutex_unlock(&di->cc_lock); 822 queue_work(di->fg_wq, &di->fg_work); 823 } 824 825 /** 826 * ab8500_fg_bat_voltage() - get battery voltage 827 * @di: pointer to the ab8500_fg structure 828 * 829 * Returns battery voltage in microvolts (on success) else error code 830 */ 831 static int ab8500_fg_bat_voltage(struct ab8500_fg *di) 832 { 833 int vbat, ret; 834 static int prev; 835 836 ret = iio_read_channel_processed(di->main_bat_v, &vbat); 837 if (ret < 0) { 838 dev_err(di->dev, 839 "%s ADC conversion failed, using previous value\n", 840 __func__); 841 return prev; 842 } 843 844 /* IIO returns millivolts but we want microvolts */ 845 vbat *= 1000; 846 prev = vbat; 847 return vbat; 848 } 849 850 /** 851 * ab8500_fg_volt_to_capacity() - Voltage based capacity 852 * @di: pointer to the ab8500_fg structure 853 * @voltage_uv: The voltage to convert to a capacity in microvolt 854 * 855 * Returns battery capacity in per mille based on voltage 856 */ 857 static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage_uv) 858 { 859 struct power_supply_battery_info *bi = di->bm->bi; 860 861 /* Multiply by 10 because the capacity is tracked in per mille */ 862 return power_supply_batinfo_ocv2cap(bi, voltage_uv, di->bat_temp) * 10; 863 } 864 865 /** 866 * ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity 867 * @di: pointer to the ab8500_fg structure 868 * 869 * Returns battery capacity based on battery voltage that is not compensated 870 * for the voltage drop due to the load 871 */ 872 static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di) 873 { 874 di->vbat_uv = ab8500_fg_bat_voltage(di); 875 return ab8500_fg_volt_to_capacity(di, di->vbat_uv); 876 } 877 878 /** 879 * ab8500_fg_battery_resistance() - Returns the battery inner resistance 880 * @di: pointer to the ab8500_fg structure 881 * @vbat_uncomp_uv: Uncompensated VBAT voltage 882 * 883 * Returns battery inner resistance added with the fuel gauge resistor value 884 * to get the total resistance in the whole link from gnd to bat+ node 885 * in milliohm. 886 */ 887 static int ab8500_fg_battery_resistance(struct ab8500_fg *di, int vbat_uncomp_uv) 888 { 889 struct power_supply_battery_info *bi = di->bm->bi; 890 int resistance_percent = 0; 891 int resistance; 892 893 /* 894 * Determine the resistance at this voltage. First try VBAT-to-Ri else 895 * just infer it from the surrounding temperature, if nothing works just 896 * use the internal resistance. 897 */ 898 if (power_supply_supports_vbat2ri(bi)) { 899 resistance = power_supply_vbat2ri(bi, vbat_uncomp_uv, di->flags.charging); 900 /* Convert to milliohm */ 901 resistance = resistance / 1000; 902 } else if (power_supply_supports_temp2ri(bi)) { 903 resistance_percent = power_supply_temp2resist_simple(bi->resist_table, 904 bi->resist_table_size, 905 di->bat_temp / 10); 906 /* Convert to milliohm */ 907 resistance = bi->factory_internal_resistance_uohm / 1000; 908 resistance = resistance * resistance_percent / 100; 909 } else { 910 /* Last fallback */ 911 resistance = bi->factory_internal_resistance_uohm / 1000; 912 } 913 914 /* Compensate for line impedance */ 915 resistance += (di->line_impedance_uohm / 1000); 916 917 dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d" 918 " fg resistance %d, total: %d (mOhm)\n", 919 __func__, di->bat_temp, resistance, di->bm->fg_res / 10, 920 (di->bm->fg_res / 10) + resistance); 921 922 /* fg_res variable is in 0.1mOhm */ 923 resistance += di->bm->fg_res / 10; 924 925 return resistance; 926 } 927 928 /** 929 * ab8500_load_comp_fg_bat_voltage() - get load compensated battery voltage 930 * @di: pointer to the ab8500_fg structure 931 * @always: always return a voltage, also uncompensated 932 * 933 * Returns compensated battery voltage (on success) else error code. 934 * If always is specified, we always return a voltage but it may be 935 * uncompensated. 936 */ 937 static int ab8500_load_comp_fg_bat_voltage(struct ab8500_fg *di, bool always) 938 { 939 int i = 0; 940 int vbat_uv = 0; 941 int rcomp; 942 943 /* Average the instant current to get a stable current measurement */ 944 ab8500_fg_inst_curr_start(di); 945 946 do { 947 vbat_uv += ab8500_fg_bat_voltage(di); 948 i++; 949 usleep_range(5000, 6000); 950 } while (!ab8500_fg_inst_curr_done(di) && 951 i <= WAIT_FOR_INST_CURRENT_MAX); 952 953 if (i > WAIT_FOR_INST_CURRENT_MAX) { 954 dev_err(di->dev, 955 "TIMEOUT: return uncompensated measurement of VBAT\n"); 956 di->vbat_uv = vbat_uv / i; 957 return di->vbat_uv; 958 } 959 960 ab8500_fg_inst_curr_finalize(di, &di->inst_curr_ua); 961 962 /* 963 * If there is too high current dissipation, the compensation cannot be 964 * trusted so return an error unless we must return something here, as 965 * enforced by the "always" parameter. 966 */ 967 if (!always && di->inst_curr_ua < IGNORE_VBAT_HIGHCUR) 968 return -EINVAL; 969 970 vbat_uv = vbat_uv / i; 971 972 /* Next we apply voltage compensation from internal resistance */ 973 rcomp = ab8500_fg_battery_resistance(di, vbat_uv); 974 vbat_uv = vbat_uv - (di->inst_curr_ua * rcomp) / 1000; 975 976 /* Always keep this state at latest measurement */ 977 di->vbat_uv = vbat_uv; 978 979 return vbat_uv; 980 } 981 982 /** 983 * ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity 984 * @di: pointer to the ab8500_fg structure 985 * 986 * Returns battery capacity based on battery voltage that is load compensated 987 * for the voltage drop 988 */ 989 static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di) 990 { 991 int vbat_comp_uv; 992 993 vbat_comp_uv = ab8500_load_comp_fg_bat_voltage(di, true); 994 995 return ab8500_fg_volt_to_capacity(di, vbat_comp_uv); 996 } 997 998 /** 999 * ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille 1000 * @di: pointer to the ab8500_fg structure 1001 * @cap_mah: capacity in mAh 1002 * 1003 * Converts capacity in mAh to capacity in permille 1004 */ 1005 static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah) 1006 { 1007 return (cap_mah * 1000) / di->bat_cap.max_mah_design; 1008 } 1009 1010 /** 1011 * ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh 1012 * @di: pointer to the ab8500_fg structure 1013 * @cap_pm: capacity in permille 1014 * 1015 * Converts capacity in permille to capacity in mAh 1016 */ 1017 static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm) 1018 { 1019 return cap_pm * di->bat_cap.max_mah_design / 1000; 1020 } 1021 1022 /** 1023 * ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh 1024 * @di: pointer to the ab8500_fg structure 1025 * @cap_mah: capacity in mAh 1026 * 1027 * Converts capacity in mAh to capacity in uWh 1028 */ 1029 static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah) 1030 { 1031 u64 div_res; 1032 u32 div_rem; 1033 1034 /* 1035 * Capacity is in milli ampere hours (10^-3)Ah 1036 * Nominal voltage is in microvolts (10^-6)V 1037 * divide by 1000000 after multiplication to get to mWh 1038 */ 1039 div_res = ((u64) cap_mah) * ((u64) di->vbat_nom_uv); 1040 div_rem = do_div(div_res, 1000000); 1041 1042 /* Make sure to round upwards if necessary */ 1043 if (div_rem >= 1000000 / 2) 1044 div_res++; 1045 1046 return (int) div_res; 1047 } 1048 1049 /** 1050 * ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging 1051 * @di: pointer to the ab8500_fg structure 1052 * 1053 * Return the capacity in mAh based on previous calculated capcity and the FG 1054 * accumulator register value. The filter is filled with this capacity 1055 */ 1056 static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di) 1057 { 1058 dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", 1059 __func__, 1060 di->bat_cap.mah, 1061 di->accu_charge); 1062 1063 /* Capacity should not be less than 0 */ 1064 if (di->bat_cap.mah + di->accu_charge > 0) 1065 di->bat_cap.mah += di->accu_charge; 1066 else 1067 di->bat_cap.mah = 0; 1068 /* 1069 * We force capacity to 100% once when the algorithm 1070 * reports that it's full. 1071 */ 1072 if (di->bat_cap.mah >= di->bat_cap.max_mah_design || 1073 di->flags.force_full) { 1074 di->bat_cap.mah = di->bat_cap.max_mah_design; 1075 } 1076 1077 ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); 1078 di->bat_cap.permille = 1079 ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); 1080 1081 /* We need to update battery voltage and inst current when charging */ 1082 di->vbat_uv = ab8500_fg_bat_voltage(di); 1083 di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); 1084 1085 return di->bat_cap.mah; 1086 } 1087 1088 /** 1089 * ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage 1090 * @di: pointer to the ab8500_fg structure 1091 * 1092 * Return the capacity in mAh based on the load compensated battery voltage. 1093 * This value is added to the filter and a new mean value is calculated and 1094 * returned. 1095 */ 1096 static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di) 1097 { 1098 int permille, mah; 1099 1100 permille = ab8500_fg_load_comp_volt_to_capacity(di); 1101 1102 mah = ab8500_fg_convert_permille_to_mah(di, permille); 1103 1104 di->bat_cap.mah = ab8500_fg_add_cap_sample(di, mah); 1105 di->bat_cap.permille = 1106 ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); 1107 1108 return di->bat_cap.mah; 1109 } 1110 1111 /** 1112 * ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG 1113 * @di: pointer to the ab8500_fg structure 1114 * 1115 * Return the capacity in mAh based on previous calculated capcity and the FG 1116 * accumulator register value. This value is added to the filter and a 1117 * new mean value is calculated and returned. 1118 */ 1119 static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di) 1120 { 1121 int permille_volt, permille; 1122 1123 dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n", 1124 __func__, 1125 di->bat_cap.mah, 1126 di->accu_charge); 1127 1128 /* Capacity should not be less than 0 */ 1129 if (di->bat_cap.mah + di->accu_charge > 0) 1130 di->bat_cap.mah += di->accu_charge; 1131 else 1132 di->bat_cap.mah = 0; 1133 1134 if (di->bat_cap.mah >= di->bat_cap.max_mah_design) 1135 di->bat_cap.mah = di->bat_cap.max_mah_design; 1136 1137 /* 1138 * Check against voltage based capacity. It can not be lower 1139 * than what the uncompensated voltage says 1140 */ 1141 permille = ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); 1142 permille_volt = ab8500_fg_uncomp_volt_to_capacity(di); 1143 1144 if (permille < permille_volt) { 1145 di->bat_cap.permille = permille_volt; 1146 di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di, 1147 di->bat_cap.permille); 1148 1149 dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n", 1150 __func__, 1151 permille, 1152 permille_volt); 1153 1154 ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); 1155 } else { 1156 ab8500_fg_fill_cap_sample(di, di->bat_cap.mah); 1157 di->bat_cap.permille = 1158 ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah); 1159 } 1160 1161 return di->bat_cap.mah; 1162 } 1163 1164 /** 1165 * ab8500_fg_capacity_level() - Get the battery capacity level 1166 * @di: pointer to the ab8500_fg structure 1167 * 1168 * Get the battery capacity level based on the capacity in percent 1169 */ 1170 static int ab8500_fg_capacity_level(struct ab8500_fg *di) 1171 { 1172 int ret, percent; 1173 1174 percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); 1175 1176 if (percent <= di->bm->cap_levels->critical || 1177 di->flags.low_bat) 1178 ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; 1179 else if (percent <= di->bm->cap_levels->low) 1180 ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW; 1181 else if (percent <= di->bm->cap_levels->normal) 1182 ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; 1183 else if (percent <= di->bm->cap_levels->high) 1184 ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; 1185 else 1186 ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL; 1187 1188 return ret; 1189 } 1190 1191 /** 1192 * ab8500_fg_calculate_scaled_capacity() - Capacity scaling 1193 * @di: pointer to the ab8500_fg structure 1194 * 1195 * Calculates the capacity to be shown to upper layers. Scales the capacity 1196 * to have 100% as a reference from the actual capacity upon removal of charger 1197 * when charging is in maintenance mode. 1198 */ 1199 static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di) 1200 { 1201 struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; 1202 int capacity = di->bat_cap.prev_percent; 1203 1204 if (!cs->enable) 1205 return capacity; 1206 1207 /* 1208 * As long as we are in fully charge mode scale the capacity 1209 * to show 100%. 1210 */ 1211 if (di->flags.fully_charged) { 1212 cs->cap_to_scale[0] = 100; 1213 cs->cap_to_scale[1] = 1214 max(capacity, di->bm->fg_params->maint_thres); 1215 dev_dbg(di->dev, "Scale cap with %d/%d\n", 1216 cs->cap_to_scale[0], cs->cap_to_scale[1]); 1217 } 1218 1219 /* Calculates the scaled capacity. */ 1220 if ((cs->cap_to_scale[0] != cs->cap_to_scale[1]) 1221 && (cs->cap_to_scale[1] > 0)) 1222 capacity = min(100, 1223 DIV_ROUND_CLOSEST(di->bat_cap.prev_percent * 1224 cs->cap_to_scale[0], 1225 cs->cap_to_scale[1])); 1226 1227 if (di->flags.charging) { 1228 if (capacity < cs->disable_cap_level) { 1229 cs->disable_cap_level = capacity; 1230 dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n", 1231 cs->disable_cap_level); 1232 } else if (!di->flags.fully_charged) { 1233 if (di->bat_cap.prev_percent >= 1234 cs->disable_cap_level) { 1235 dev_dbg(di->dev, "Disabling scaled capacity\n"); 1236 cs->enable = false; 1237 capacity = di->bat_cap.prev_percent; 1238 } else { 1239 dev_dbg(di->dev, 1240 "Waiting in cap to level %d%%\n", 1241 cs->disable_cap_level); 1242 capacity = cs->disable_cap_level; 1243 } 1244 } 1245 } 1246 1247 return capacity; 1248 } 1249 1250 /** 1251 * ab8500_fg_update_cap_scalers() - Capacity scaling 1252 * @di: pointer to the ab8500_fg structure 1253 * 1254 * To be called when state change from charge<->discharge to update 1255 * the capacity scalers. 1256 */ 1257 static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di) 1258 { 1259 struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale; 1260 1261 if (!cs->enable) 1262 return; 1263 if (di->flags.charging) { 1264 di->bat_cap.cap_scale.disable_cap_level = 1265 di->bat_cap.cap_scale.scaled_cap; 1266 dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n", 1267 di->bat_cap.cap_scale.disable_cap_level); 1268 } else { 1269 if (cs->scaled_cap != 100) { 1270 cs->cap_to_scale[0] = cs->scaled_cap; 1271 cs->cap_to_scale[1] = di->bat_cap.prev_percent; 1272 } else { 1273 cs->cap_to_scale[0] = 100; 1274 cs->cap_to_scale[1] = 1275 max(di->bat_cap.prev_percent, 1276 di->bm->fg_params->maint_thres); 1277 } 1278 1279 dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n", 1280 cs->cap_to_scale[0], cs->cap_to_scale[1]); 1281 } 1282 } 1283 1284 /** 1285 * ab8500_fg_check_capacity_limits() - Check if capacity has changed 1286 * @di: pointer to the ab8500_fg structure 1287 * @init: capacity is allowed to go up in init mode 1288 * 1289 * Check if capacity or capacity limit has changed and notify the system 1290 * about it using the power_supply framework 1291 */ 1292 static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) 1293 { 1294 bool changed = false; 1295 int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10); 1296 1297 di->bat_cap.level = ab8500_fg_capacity_level(di); 1298 1299 if (di->bat_cap.level != di->bat_cap.prev_level) { 1300 /* 1301 * We do not allow reported capacity level to go up 1302 * unless we're charging or if we're in init 1303 */ 1304 if (!(!di->flags.charging && di->bat_cap.level > 1305 di->bat_cap.prev_level) || init) { 1306 dev_dbg(di->dev, "level changed from %d to %d\n", 1307 di->bat_cap.prev_level, 1308 di->bat_cap.level); 1309 di->bat_cap.prev_level = di->bat_cap.level; 1310 changed = true; 1311 } else { 1312 dev_dbg(di->dev, "level not allowed to go up " 1313 "since no charger is connected: %d to %d\n", 1314 di->bat_cap.prev_level, 1315 di->bat_cap.level); 1316 } 1317 } 1318 1319 /* 1320 * If we have received the LOW_BAT IRQ, set capacity to 0 to initiate 1321 * shutdown 1322 */ 1323 if (di->flags.low_bat) { 1324 dev_dbg(di->dev, "Battery low, set capacity to 0\n"); 1325 di->bat_cap.prev_percent = 0; 1326 di->bat_cap.permille = 0; 1327 percent = 0; 1328 di->bat_cap.prev_mah = 0; 1329 di->bat_cap.mah = 0; 1330 changed = true; 1331 } else if (di->flags.fully_charged) { 1332 /* 1333 * We report 100% if algorithm reported fully charged 1334 * and show 100% during maintenance charging (scaling). 1335 */ 1336 if (di->flags.force_full) { 1337 di->bat_cap.prev_percent = percent; 1338 di->bat_cap.prev_mah = di->bat_cap.mah; 1339 1340 changed = true; 1341 1342 if (!di->bat_cap.cap_scale.enable && 1343 di->bm->capacity_scaling) { 1344 di->bat_cap.cap_scale.enable = true; 1345 di->bat_cap.cap_scale.cap_to_scale[0] = 100; 1346 di->bat_cap.cap_scale.cap_to_scale[1] = 1347 di->bat_cap.prev_percent; 1348 di->bat_cap.cap_scale.disable_cap_level = 100; 1349 } 1350 } else if (di->bat_cap.prev_percent != percent) { 1351 dev_dbg(di->dev, 1352 "battery reported full " 1353 "but capacity dropping: %d\n", 1354 percent); 1355 di->bat_cap.prev_percent = percent; 1356 di->bat_cap.prev_mah = di->bat_cap.mah; 1357 1358 changed = true; 1359 } 1360 } else if (di->bat_cap.prev_percent != percent) { 1361 if (percent == 0) { 1362 /* 1363 * We will not report 0% unless we've got 1364 * the LOW_BAT IRQ, no matter what the FG 1365 * algorithm says. 1366 */ 1367 di->bat_cap.prev_percent = 1; 1368 percent = 1; 1369 1370 changed = true; 1371 } else if (!(!di->flags.charging && 1372 percent > di->bat_cap.prev_percent) || init) { 1373 /* 1374 * We do not allow reported capacity to go up 1375 * unless we're charging or if we're in init 1376 */ 1377 dev_dbg(di->dev, 1378 "capacity changed from %d to %d (%d)\n", 1379 di->bat_cap.prev_percent, 1380 percent, 1381 di->bat_cap.permille); 1382 di->bat_cap.prev_percent = percent; 1383 di->bat_cap.prev_mah = di->bat_cap.mah; 1384 1385 changed = true; 1386 } else { 1387 dev_dbg(di->dev, "capacity not allowed to go up since " 1388 "no charger is connected: %d to %d (%d)\n", 1389 di->bat_cap.prev_percent, 1390 percent, 1391 di->bat_cap.permille); 1392 } 1393 } 1394 1395 if (changed) { 1396 if (di->bm->capacity_scaling) { 1397 di->bat_cap.cap_scale.scaled_cap = 1398 ab8500_fg_calculate_scaled_capacity(di); 1399 1400 dev_info(di->dev, "capacity=%d (%d)\n", 1401 di->bat_cap.prev_percent, 1402 di->bat_cap.cap_scale.scaled_cap); 1403 } 1404 power_supply_changed(di->fg_psy); 1405 if (di->flags.fully_charged && di->flags.force_full) { 1406 dev_dbg(di->dev, "Battery full, notifying.\n"); 1407 di->flags.force_full = false; 1408 sysfs_notify(&di->fg_kobject, NULL, "charge_full"); 1409 } 1410 sysfs_notify(&di->fg_kobject, NULL, "charge_now"); 1411 } 1412 } 1413 1414 static void ab8500_fg_charge_state_to(struct ab8500_fg *di, 1415 enum ab8500_fg_charge_state new_state) 1416 { 1417 dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n", 1418 di->charge_state, 1419 charge_state[di->charge_state], 1420 new_state, 1421 charge_state[new_state]); 1422 1423 di->charge_state = new_state; 1424 } 1425 1426 static void ab8500_fg_discharge_state_to(struct ab8500_fg *di, 1427 enum ab8500_fg_discharge_state new_state) 1428 { 1429 dev_dbg(di->dev, "Discharge state from %d [%s] to %d [%s]\n", 1430 di->discharge_state, 1431 discharge_state[di->discharge_state], 1432 new_state, 1433 discharge_state[new_state]); 1434 1435 di->discharge_state = new_state; 1436 } 1437 1438 /** 1439 * ab8500_fg_algorithm_charging() - FG algorithm for when charging 1440 * @di: pointer to the ab8500_fg structure 1441 * 1442 * Battery capacity calculation state machine for when we're charging 1443 */ 1444 static void ab8500_fg_algorithm_charging(struct ab8500_fg *di) 1445 { 1446 /* 1447 * If we change to discharge mode 1448 * we should start with recovery 1449 */ 1450 if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY) 1451 ab8500_fg_discharge_state_to(di, 1452 AB8500_FG_DISCHARGE_INIT_RECOVERY); 1453 1454 switch (di->charge_state) { 1455 case AB8500_FG_CHARGE_INIT: 1456 di->fg_samples = SEC_TO_SAMPLE( 1457 di->bm->fg_params->accu_charging); 1458 1459 ab8500_fg_coulomb_counter(di, true); 1460 ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_READOUT); 1461 1462 break; 1463 1464 case AB8500_FG_CHARGE_READOUT: 1465 /* 1466 * Read the FG and calculate the new capacity 1467 */ 1468 mutex_lock(&di->cc_lock); 1469 if (!di->flags.conv_done && !di->flags.force_full) { 1470 /* Wasn't the CC IRQ that got us here */ 1471 mutex_unlock(&di->cc_lock); 1472 dev_dbg(di->dev, "%s CC conv not done\n", 1473 __func__); 1474 1475 break; 1476 } 1477 di->flags.conv_done = false; 1478 mutex_unlock(&di->cc_lock); 1479 1480 ab8500_fg_calc_cap_charging(di); 1481 1482 break; 1483 1484 default: 1485 break; 1486 } 1487 1488 /* Check capacity limits */ 1489 ab8500_fg_check_capacity_limits(di, false); 1490 } 1491 1492 static void force_capacity(struct ab8500_fg *di) 1493 { 1494 int cap; 1495 1496 ab8500_fg_clear_cap_samples(di); 1497 cap = di->bat_cap.user_mah; 1498 if (cap > di->bat_cap.max_mah_design) { 1499 dev_dbg(di->dev, "Remaining cap %d can't be bigger than total" 1500 " %d\n", cap, di->bat_cap.max_mah_design); 1501 cap = di->bat_cap.max_mah_design; 1502 } 1503 ab8500_fg_fill_cap_sample(di, di->bat_cap.user_mah); 1504 di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap); 1505 di->bat_cap.mah = cap; 1506 ab8500_fg_check_capacity_limits(di, true); 1507 } 1508 1509 static bool check_sysfs_capacity(struct ab8500_fg *di) 1510 { 1511 int cap, lower, upper; 1512 int cap_permille; 1513 1514 cap = di->bat_cap.user_mah; 1515 1516 cap_permille = ab8500_fg_convert_mah_to_permille(di, 1517 di->bat_cap.user_mah); 1518 1519 lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10; 1520 upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10; 1521 1522 if (lower < 0) 1523 lower = 0; 1524 /* 1000 is permille, -> 100 percent */ 1525 if (upper > 1000) 1526 upper = 1000; 1527 1528 dev_dbg(di->dev, "Capacity limits:" 1529 " (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n", 1530 lower, cap_permille, upper, cap, di->bat_cap.mah); 1531 1532 /* If within limits, use the saved capacity and exit estimation...*/ 1533 if (cap_permille > lower && cap_permille < upper) { 1534 dev_dbg(di->dev, "OK! Using users cap %d uAh now\n", cap); 1535 force_capacity(di); 1536 return true; 1537 } 1538 dev_dbg(di->dev, "Capacity from user out of limits, ignoring"); 1539 return false; 1540 } 1541 1542 /** 1543 * ab8500_fg_algorithm_discharging() - FG algorithm for when discharging 1544 * @di: pointer to the ab8500_fg structure 1545 * 1546 * Battery capacity calculation state machine for when we're discharging 1547 */ 1548 static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di) 1549 { 1550 int sleep_time; 1551 1552 /* If we change to charge mode we should start with init */ 1553 if (di->charge_state != AB8500_FG_CHARGE_INIT) 1554 ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); 1555 1556 switch (di->discharge_state) { 1557 case AB8500_FG_DISCHARGE_INIT: 1558 /* We use the FG IRQ to work on */ 1559 di->init_cnt = 0; 1560 di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); 1561 ab8500_fg_coulomb_counter(di, true); 1562 ab8500_fg_discharge_state_to(di, 1563 AB8500_FG_DISCHARGE_INITMEASURING); 1564 1565 fallthrough; 1566 case AB8500_FG_DISCHARGE_INITMEASURING: 1567 /* 1568 * Discard a number of samples during startup. 1569 * After that, use compensated voltage for a few 1570 * samples to get an initial capacity. 1571 * Then go to READOUT 1572 */ 1573 sleep_time = di->bm->fg_params->init_timer; 1574 1575 /* Discard the first [x] seconds */ 1576 if (di->init_cnt > di->bm->fg_params->init_discard_time) { 1577 ab8500_fg_calc_cap_discharge_voltage(di); 1578 1579 ab8500_fg_check_capacity_limits(di, true); 1580 } 1581 1582 di->init_cnt += sleep_time; 1583 if (di->init_cnt > di->bm->fg_params->init_total_time) 1584 ab8500_fg_discharge_state_to(di, 1585 AB8500_FG_DISCHARGE_READOUT_INIT); 1586 1587 break; 1588 1589 case AB8500_FG_DISCHARGE_INIT_RECOVERY: 1590 di->recovery_cnt = 0; 1591 di->recovery_needed = true; 1592 ab8500_fg_discharge_state_to(di, 1593 AB8500_FG_DISCHARGE_RECOVERY); 1594 1595 fallthrough; 1596 1597 case AB8500_FG_DISCHARGE_RECOVERY: 1598 sleep_time = di->bm->fg_params->recovery_sleep_timer; 1599 1600 /* 1601 * We should check the power consumption 1602 * If low, go to READOUT (after x min) or 1603 * RECOVERY_SLEEP if time left. 1604 * If high, go to READOUT 1605 */ 1606 di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); 1607 1608 if (ab8500_fg_is_low_curr(di, di->inst_curr_ua)) { 1609 if (di->recovery_cnt > 1610 di->bm->fg_params->recovery_total_time) { 1611 di->fg_samples = SEC_TO_SAMPLE( 1612 di->bm->fg_params->accu_high_curr); 1613 ab8500_fg_coulomb_counter(di, true); 1614 ab8500_fg_discharge_state_to(di, 1615 AB8500_FG_DISCHARGE_READOUT); 1616 di->recovery_needed = false; 1617 } else { 1618 queue_delayed_work(di->fg_wq, 1619 &di->fg_periodic_work, 1620 sleep_time * HZ); 1621 } 1622 di->recovery_cnt += sleep_time; 1623 } else { 1624 di->fg_samples = SEC_TO_SAMPLE( 1625 di->bm->fg_params->accu_high_curr); 1626 ab8500_fg_coulomb_counter(di, true); 1627 ab8500_fg_discharge_state_to(di, 1628 AB8500_FG_DISCHARGE_READOUT); 1629 } 1630 break; 1631 1632 case AB8500_FG_DISCHARGE_READOUT_INIT: 1633 di->fg_samples = SEC_TO_SAMPLE( 1634 di->bm->fg_params->accu_high_curr); 1635 ab8500_fg_coulomb_counter(di, true); 1636 ab8500_fg_discharge_state_to(di, 1637 AB8500_FG_DISCHARGE_READOUT); 1638 break; 1639 1640 case AB8500_FG_DISCHARGE_READOUT: 1641 di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di); 1642 1643 if (ab8500_fg_is_low_curr(di, di->inst_curr_ua)) { 1644 /* Detect mode change */ 1645 if (di->high_curr_mode) { 1646 di->high_curr_mode = false; 1647 di->high_curr_cnt = 0; 1648 } 1649 1650 if (di->recovery_needed) { 1651 ab8500_fg_discharge_state_to(di, 1652 AB8500_FG_DISCHARGE_INIT_RECOVERY); 1653 1654 queue_delayed_work(di->fg_wq, 1655 &di->fg_periodic_work, 0); 1656 1657 break; 1658 } 1659 1660 ab8500_fg_calc_cap_discharge_voltage(di); 1661 } else { 1662 mutex_lock(&di->cc_lock); 1663 if (!di->flags.conv_done) { 1664 /* Wasn't the CC IRQ that got us here */ 1665 mutex_unlock(&di->cc_lock); 1666 dev_dbg(di->dev, "%s CC conv not done\n", 1667 __func__); 1668 1669 break; 1670 } 1671 di->flags.conv_done = false; 1672 mutex_unlock(&di->cc_lock); 1673 1674 /* Detect mode change */ 1675 if (!di->high_curr_mode) { 1676 di->high_curr_mode = true; 1677 di->high_curr_cnt = 0; 1678 } 1679 1680 di->high_curr_cnt += 1681 di->bm->fg_params->accu_high_curr; 1682 if (di->high_curr_cnt > 1683 di->bm->fg_params->high_curr_time) 1684 di->recovery_needed = true; 1685 1686 ab8500_fg_calc_cap_discharge_fg(di); 1687 } 1688 1689 ab8500_fg_check_capacity_limits(di, false); 1690 1691 break; 1692 1693 case AB8500_FG_DISCHARGE_WAKEUP: 1694 ab8500_fg_calc_cap_discharge_voltage(di); 1695 1696 di->fg_samples = SEC_TO_SAMPLE( 1697 di->bm->fg_params->accu_high_curr); 1698 ab8500_fg_coulomb_counter(di, true); 1699 ab8500_fg_discharge_state_to(di, 1700 AB8500_FG_DISCHARGE_READOUT); 1701 1702 ab8500_fg_check_capacity_limits(di, false); 1703 1704 break; 1705 1706 default: 1707 break; 1708 } 1709 } 1710 1711 /** 1712 * ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration 1713 * @di: pointer to the ab8500_fg structure 1714 * 1715 */ 1716 static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di) 1717 { 1718 int ret; 1719 1720 switch (di->calib_state) { 1721 case AB8500_FG_CALIB_INIT: 1722 dev_dbg(di->dev, "Calibration ongoing...\n"); 1723 1724 ret = abx500_mask_and_set_register_interruptible(di->dev, 1725 AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 1726 CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8); 1727 if (ret < 0) 1728 goto err; 1729 1730 ret = abx500_mask_and_set_register_interruptible(di->dev, 1731 AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 1732 CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA); 1733 if (ret < 0) 1734 goto err; 1735 di->calib_state = AB8500_FG_CALIB_WAIT; 1736 break; 1737 case AB8500_FG_CALIB_END: 1738 ret = abx500_mask_and_set_register_interruptible(di->dev, 1739 AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 1740 CC_MUXOFFSET, CC_MUXOFFSET); 1741 if (ret < 0) 1742 goto err; 1743 di->flags.calibrate = false; 1744 dev_dbg(di->dev, "Calibration done...\n"); 1745 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 1746 break; 1747 case AB8500_FG_CALIB_WAIT: 1748 dev_dbg(di->dev, "Calibration WFI\n"); 1749 break; 1750 default: 1751 break; 1752 } 1753 return; 1754 err: 1755 /* Something went wrong, don't calibrate then */ 1756 dev_err(di->dev, "failed to calibrate the CC\n"); 1757 di->flags.calibrate = false; 1758 di->calib_state = AB8500_FG_CALIB_INIT; 1759 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 1760 } 1761 1762 /** 1763 * ab8500_fg_algorithm() - Entry point for the FG algorithm 1764 * @di: pointer to the ab8500_fg structure 1765 * 1766 * Entry point for the battery capacity calculation state machine 1767 */ 1768 static void ab8500_fg_algorithm(struct ab8500_fg *di) 1769 { 1770 if (di->flags.calibrate) 1771 ab8500_fg_algorithm_calibrate(di); 1772 else { 1773 if (di->flags.charging) 1774 ab8500_fg_algorithm_charging(di); 1775 else 1776 ab8500_fg_algorithm_discharging(di); 1777 } 1778 1779 dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d " 1780 "%d %d %d %d %d %d %d\n", 1781 di->bat_cap.max_mah_design, 1782 di->bat_cap.max_mah, 1783 di->bat_cap.mah, 1784 di->bat_cap.permille, 1785 di->bat_cap.level, 1786 di->bat_cap.prev_mah, 1787 di->bat_cap.prev_percent, 1788 di->bat_cap.prev_level, 1789 di->vbat_uv, 1790 di->inst_curr_ua, 1791 di->avg_curr_ua, 1792 di->accu_charge, 1793 di->flags.charging, 1794 di->charge_state, 1795 di->discharge_state, 1796 di->high_curr_mode, 1797 di->recovery_needed); 1798 } 1799 1800 /** 1801 * ab8500_fg_periodic_work() - Run the FG state machine periodically 1802 * @work: pointer to the work_struct structure 1803 * 1804 * Work queue function for periodic work 1805 */ 1806 static void ab8500_fg_periodic_work(struct work_struct *work) 1807 { 1808 struct ab8500_fg *di = container_of(work, struct ab8500_fg, 1809 fg_periodic_work.work); 1810 1811 if (di->init_capacity) { 1812 /* Get an initial capacity calculation */ 1813 ab8500_fg_calc_cap_discharge_voltage(di); 1814 ab8500_fg_check_capacity_limits(di, true); 1815 di->init_capacity = false; 1816 1817 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 1818 } else if (di->flags.user_cap) { 1819 if (check_sysfs_capacity(di)) { 1820 ab8500_fg_check_capacity_limits(di, true); 1821 if (di->flags.charging) 1822 ab8500_fg_charge_state_to(di, 1823 AB8500_FG_CHARGE_INIT); 1824 else 1825 ab8500_fg_discharge_state_to(di, 1826 AB8500_FG_DISCHARGE_READOUT_INIT); 1827 } 1828 di->flags.user_cap = false; 1829 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 1830 } else 1831 ab8500_fg_algorithm(di); 1832 1833 } 1834 1835 /** 1836 * ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition 1837 * @work: pointer to the work_struct structure 1838 * 1839 * Work queue function for checking the OVV_BAT condition 1840 */ 1841 static void ab8500_fg_check_hw_failure_work(struct work_struct *work) 1842 { 1843 int ret; 1844 u8 reg_value; 1845 1846 struct ab8500_fg *di = container_of(work, struct ab8500_fg, 1847 fg_check_hw_failure_work.work); 1848 1849 /* 1850 * If we have had a battery over-voltage situation, 1851 * check ovv-bit to see if it should be reset. 1852 */ 1853 ret = abx500_get_register_interruptible(di->dev, 1854 AB8500_CHARGER, AB8500_CH_STAT_REG, 1855 ®_value); 1856 if (ret < 0) { 1857 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 1858 return; 1859 } 1860 if ((reg_value & BATT_OVV) == BATT_OVV) { 1861 if (!di->flags.bat_ovv) { 1862 dev_dbg(di->dev, "Battery OVV\n"); 1863 di->flags.bat_ovv = true; 1864 power_supply_changed(di->fg_psy); 1865 } 1866 /* Not yet recovered from ovv, reschedule this test */ 1867 queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 1868 HZ); 1869 } else { 1870 dev_dbg(di->dev, "Battery recovered from OVV\n"); 1871 di->flags.bat_ovv = false; 1872 power_supply_changed(di->fg_psy); 1873 } 1874 } 1875 1876 /** 1877 * ab8500_fg_low_bat_work() - Check LOW_BAT condition 1878 * @work: pointer to the work_struct structure 1879 * 1880 * Work queue function for checking the LOW_BAT condition 1881 */ 1882 static void ab8500_fg_low_bat_work(struct work_struct *work) 1883 { 1884 int vbat_uv; 1885 1886 struct ab8500_fg *di = container_of(work, struct ab8500_fg, 1887 fg_low_bat_work.work); 1888 1889 vbat_uv = ab8500_fg_bat_voltage(di); 1890 1891 /* Check if LOW_BAT still fulfilled */ 1892 if (vbat_uv < di->bm->fg_params->lowbat_threshold_uv) { 1893 /* Is it time to shut down? */ 1894 if (di->low_bat_cnt < 1) { 1895 di->flags.low_bat = true; 1896 dev_warn(di->dev, "Shut down pending...\n"); 1897 } else { 1898 /* 1899 * Else we need to re-schedule this check to be able to detect 1900 * if the voltage increases again during charging or 1901 * due to decreasing load. 1902 */ 1903 di->low_bat_cnt--; 1904 dev_warn(di->dev, "Battery voltage still LOW\n"); 1905 queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, 1906 round_jiffies(LOW_BAT_CHECK_INTERVAL)); 1907 } 1908 } else { 1909 di->flags.low_bat_delay = false; 1910 di->low_bat_cnt = 10; 1911 dev_warn(di->dev, "Battery voltage OK again\n"); 1912 } 1913 1914 /* This is needed to dispatch LOW_BAT */ 1915 ab8500_fg_check_capacity_limits(di, false); 1916 } 1917 1918 /** 1919 * ab8500_fg_battok_calc - calculate the bit pattern corresponding 1920 * to the target voltage. 1921 * @di: pointer to the ab8500_fg structure 1922 * @target: target voltage 1923 * 1924 * Returns bit pattern closest to the target voltage 1925 * valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS) 1926 */ 1927 1928 static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target) 1929 { 1930 if (target > BATT_OK_MIN + 1931 (BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS)) 1932 return BATT_OK_MAX_NR_INCREMENTS; 1933 if (target < BATT_OK_MIN) 1934 return 0; 1935 return (target - BATT_OK_MIN) / BATT_OK_INCREMENT; 1936 } 1937 1938 /** 1939 * ab8500_fg_battok_init_hw_register - init battok levels 1940 * @di: pointer to the ab8500_fg structure 1941 * 1942 */ 1943 1944 static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di) 1945 { 1946 int selected; 1947 int sel0; 1948 int sel1; 1949 int cbp_sel0; 1950 int cbp_sel1; 1951 int ret; 1952 int new_val; 1953 1954 sel0 = di->bm->fg_params->battok_falling_th_sel0; 1955 sel1 = di->bm->fg_params->battok_raising_th_sel1; 1956 1957 cbp_sel0 = ab8500_fg_battok_calc(di, sel0); 1958 cbp_sel1 = ab8500_fg_battok_calc(di, sel1); 1959 1960 selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT; 1961 1962 if (selected != sel0) 1963 dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", 1964 sel0, selected, cbp_sel0); 1965 1966 selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT; 1967 1968 if (selected != sel1) 1969 dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n", 1970 sel1, selected, cbp_sel1); 1971 1972 new_val = cbp_sel0 | (cbp_sel1 << 4); 1973 1974 dev_dbg(di->dev, "using: %x %d %d\n", new_val, cbp_sel0, cbp_sel1); 1975 ret = abx500_set_register_interruptible(di->dev, AB8500_SYS_CTRL2_BLOCK, 1976 AB8500_BATT_OK_REG, new_val); 1977 return ret; 1978 } 1979 1980 /** 1981 * ab8500_fg_instant_work() - Run the FG state machine instantly 1982 * @work: pointer to the work_struct structure 1983 * 1984 * Work queue function for instant work 1985 */ 1986 static void ab8500_fg_instant_work(struct work_struct *work) 1987 { 1988 struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work); 1989 1990 ab8500_fg_algorithm(di); 1991 } 1992 1993 /** 1994 * ab8500_fg_cc_data_end_handler() - end of data conversion isr. 1995 * @irq: interrupt number 1996 * @_di: pointer to the ab8500_fg structure 1997 * 1998 * Returns IRQ status(IRQ_HANDLED) 1999 */ 2000 static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di) 2001 { 2002 struct ab8500_fg *di = _di; 2003 if (!di->nbr_cceoc_irq_cnt) { 2004 di->nbr_cceoc_irq_cnt++; 2005 complete(&di->ab8500_fg_started); 2006 } else { 2007 di->nbr_cceoc_irq_cnt = 0; 2008 complete(&di->ab8500_fg_complete); 2009 } 2010 return IRQ_HANDLED; 2011 } 2012 2013 /** 2014 * ab8500_fg_cc_int_calib_handler () - end of calibration isr. 2015 * @irq: interrupt number 2016 * @_di: pointer to the ab8500_fg structure 2017 * 2018 * Returns IRQ status(IRQ_HANDLED) 2019 */ 2020 static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di) 2021 { 2022 struct ab8500_fg *di = _di; 2023 di->calib_state = AB8500_FG_CALIB_END; 2024 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 2025 return IRQ_HANDLED; 2026 } 2027 2028 /** 2029 * ab8500_fg_cc_convend_handler() - isr to get battery avg current. 2030 * @irq: interrupt number 2031 * @_di: pointer to the ab8500_fg structure 2032 * 2033 * Returns IRQ status(IRQ_HANDLED) 2034 */ 2035 static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di) 2036 { 2037 struct ab8500_fg *di = _di; 2038 2039 queue_work(di->fg_wq, &di->fg_acc_cur_work); 2040 2041 return IRQ_HANDLED; 2042 } 2043 2044 /** 2045 * ab8500_fg_batt_ovv_handler() - Battery OVV occured 2046 * @irq: interrupt number 2047 * @_di: pointer to the ab8500_fg structure 2048 * 2049 * Returns IRQ status(IRQ_HANDLED) 2050 */ 2051 static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di) 2052 { 2053 struct ab8500_fg *di = _di; 2054 2055 dev_dbg(di->dev, "Battery OVV\n"); 2056 2057 /* Schedule a new HW failure check */ 2058 queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0); 2059 2060 return IRQ_HANDLED; 2061 } 2062 2063 /** 2064 * ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold 2065 * @irq: interrupt number 2066 * @_di: pointer to the ab8500_fg structure 2067 * 2068 * Returns IRQ status(IRQ_HANDLED) 2069 */ 2070 static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di) 2071 { 2072 struct ab8500_fg *di = _di; 2073 2074 /* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */ 2075 if (!di->flags.low_bat_delay) { 2076 dev_warn(di->dev, "Battery voltage is below LOW threshold\n"); 2077 di->flags.low_bat_delay = true; 2078 /* 2079 * Start a timer to check LOW_BAT again after some time 2080 * This is done to avoid shutdown on single voltage dips 2081 */ 2082 queue_delayed_work(di->fg_wq, &di->fg_low_bat_work, 2083 round_jiffies(LOW_BAT_CHECK_INTERVAL)); 2084 } 2085 return IRQ_HANDLED; 2086 } 2087 2088 /** 2089 * ab8500_fg_get_property() - get the fg properties 2090 * @psy: pointer to the power_supply structure 2091 * @psp: pointer to the power_supply_property structure 2092 * @val: pointer to the power_supply_propval union 2093 * 2094 * This function gets called when an application tries to get the 2095 * fg properties by reading the sysfs files. 2096 * voltage_now: battery voltage 2097 * current_now: battery instant current 2098 * current_avg: battery average current 2099 * charge_full_design: capacity where battery is considered full 2100 * charge_now: battery capacity in nAh 2101 * capacity: capacity in percent 2102 * capacity_level: capacity level 2103 * 2104 * Returns error code in case of failure else 0 on success 2105 */ 2106 static int ab8500_fg_get_property(struct power_supply *psy, 2107 enum power_supply_property psp, 2108 union power_supply_propval *val) 2109 { 2110 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2111 2112 /* 2113 * If battery is identified as unknown and charging of unknown 2114 * batteries is disabled, we always report 100% capacity and 2115 * capacity level UNKNOWN, since we can't calculate 2116 * remaining capacity 2117 */ 2118 2119 switch (psp) { 2120 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 2121 if (di->flags.bat_ovv) 2122 val->intval = BATT_OVV_VALUE; 2123 else 2124 val->intval = di->vbat_uv; 2125 break; 2126 case POWER_SUPPLY_PROP_CURRENT_NOW: 2127 val->intval = di->inst_curr_ua; 2128 break; 2129 case POWER_SUPPLY_PROP_CURRENT_AVG: 2130 val->intval = di->avg_curr_ua; 2131 break; 2132 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 2133 val->intval = ab8500_fg_convert_mah_to_uwh(di, 2134 di->bat_cap.max_mah_design); 2135 break; 2136 case POWER_SUPPLY_PROP_ENERGY_FULL: 2137 val->intval = ab8500_fg_convert_mah_to_uwh(di, 2138 di->bat_cap.max_mah); 2139 break; 2140 case POWER_SUPPLY_PROP_ENERGY_NOW: 2141 if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && 2142 di->flags.batt_id_received) 2143 val->intval = ab8500_fg_convert_mah_to_uwh(di, 2144 di->bat_cap.max_mah); 2145 else 2146 val->intval = ab8500_fg_convert_mah_to_uwh(di, 2147 di->bat_cap.prev_mah); 2148 break; 2149 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 2150 val->intval = di->bat_cap.max_mah_design; 2151 break; 2152 case POWER_SUPPLY_PROP_CHARGE_FULL: 2153 val->intval = di->bat_cap.max_mah; 2154 break; 2155 case POWER_SUPPLY_PROP_CHARGE_NOW: 2156 if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && 2157 di->flags.batt_id_received) 2158 val->intval = di->bat_cap.max_mah; 2159 else 2160 val->intval = di->bat_cap.prev_mah; 2161 break; 2162 case POWER_SUPPLY_PROP_CAPACITY: 2163 if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && 2164 di->flags.batt_id_received) 2165 val->intval = 100; 2166 else 2167 val->intval = di->bat_cap.prev_percent; 2168 break; 2169 case POWER_SUPPLY_PROP_CAPACITY_LEVEL: 2170 if (di->flags.batt_unknown && !di->bm->chg_unknown_bat && 2171 di->flags.batt_id_received) 2172 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; 2173 else 2174 val->intval = di->bat_cap.prev_level; 2175 break; 2176 default: 2177 return -EINVAL; 2178 } 2179 return 0; 2180 } 2181 2182 static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) 2183 { 2184 struct power_supply *psy; 2185 struct power_supply *ext = dev_get_drvdata(dev); 2186 const char **supplicants = (const char **)ext->supplied_to; 2187 struct ab8500_fg *di; 2188 struct power_supply_battery_info *bi; 2189 union power_supply_propval ret; 2190 int j; 2191 2192 psy = (struct power_supply *)data; 2193 di = power_supply_get_drvdata(psy); 2194 bi = di->bm->bi; 2195 2196 /* 2197 * For all psy where the name of your driver 2198 * appears in any supplied_to 2199 */ 2200 j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 2201 if (j < 0) 2202 return 0; 2203 2204 /* Go through all properties for the psy */ 2205 for (j = 0; j < ext->desc->num_properties; j++) { 2206 enum power_supply_property prop; 2207 prop = ext->desc->properties[j]; 2208 2209 if (power_supply_get_property(ext, prop, &ret)) 2210 continue; 2211 2212 switch (prop) { 2213 case POWER_SUPPLY_PROP_STATUS: 2214 switch (ext->desc->type) { 2215 case POWER_SUPPLY_TYPE_BATTERY: 2216 switch (ret.intval) { 2217 case POWER_SUPPLY_STATUS_UNKNOWN: 2218 case POWER_SUPPLY_STATUS_DISCHARGING: 2219 case POWER_SUPPLY_STATUS_NOT_CHARGING: 2220 if (!di->flags.charging) 2221 break; 2222 di->flags.charging = false; 2223 di->flags.fully_charged = false; 2224 if (di->bm->capacity_scaling) 2225 ab8500_fg_update_cap_scalers(di); 2226 queue_work(di->fg_wq, &di->fg_work); 2227 break; 2228 case POWER_SUPPLY_STATUS_FULL: 2229 if (di->flags.fully_charged) 2230 break; 2231 di->flags.fully_charged = true; 2232 di->flags.force_full = true; 2233 /* Save current capacity as maximum */ 2234 di->bat_cap.max_mah = di->bat_cap.mah; 2235 queue_work(di->fg_wq, &di->fg_work); 2236 break; 2237 case POWER_SUPPLY_STATUS_CHARGING: 2238 if (di->flags.charging && 2239 !di->flags.fully_charged) 2240 break; 2241 di->flags.charging = true; 2242 di->flags.fully_charged = false; 2243 if (di->bm->capacity_scaling) 2244 ab8500_fg_update_cap_scalers(di); 2245 queue_work(di->fg_wq, &di->fg_work); 2246 break; 2247 } 2248 break; 2249 default: 2250 break; 2251 } 2252 break; 2253 case POWER_SUPPLY_PROP_TECHNOLOGY: 2254 switch (ext->desc->type) { 2255 case POWER_SUPPLY_TYPE_BATTERY: 2256 if (!di->flags.batt_id_received && 2257 (bi && (bi->technology != 2258 POWER_SUPPLY_TECHNOLOGY_UNKNOWN))) { 2259 di->flags.batt_id_received = true; 2260 2261 di->bat_cap.max_mah_design = 2262 di->bm->bi->charge_full_design_uah; 2263 2264 di->bat_cap.max_mah = 2265 di->bat_cap.max_mah_design; 2266 2267 di->vbat_nom_uv = 2268 di->bm->bi->voltage_max_design_uv; 2269 } 2270 2271 if (ret.intval) 2272 di->flags.batt_unknown = false; 2273 else 2274 di->flags.batt_unknown = true; 2275 break; 2276 default: 2277 break; 2278 } 2279 break; 2280 case POWER_SUPPLY_PROP_TEMP: 2281 switch (ext->desc->type) { 2282 case POWER_SUPPLY_TYPE_BATTERY: 2283 if (di->flags.batt_id_received) 2284 di->bat_temp = ret.intval; 2285 break; 2286 default: 2287 break; 2288 } 2289 break; 2290 default: 2291 break; 2292 } 2293 } 2294 return 0; 2295 } 2296 2297 /** 2298 * ab8500_fg_init_hw_registers() - Set up FG related registers 2299 * @di: pointer to the ab8500_fg structure 2300 * 2301 * Set up battery OVV, low battery voltage registers 2302 */ 2303 static int ab8500_fg_init_hw_registers(struct ab8500_fg *di) 2304 { 2305 int ret; 2306 2307 /* 2308 * Set VBAT OVV (overvoltage) threshold to 4.75V (typ) this is what 2309 * the hardware supports, nothing else can be configured in hardware. 2310 * See this as an "outer limit" where the charger will certainly 2311 * shut down. Other (lower) overvoltage levels need to be implemented 2312 * in software. 2313 */ 2314 ret = abx500_mask_and_set_register_interruptible(di->dev, 2315 AB8500_CHARGER, 2316 AB8500_BATT_OVV, 2317 BATT_OVV_TH_4P75, 2318 BATT_OVV_TH_4P75); 2319 if (ret) { 2320 dev_err(di->dev, "failed to set BATT_OVV\n"); 2321 goto out; 2322 } 2323 2324 /* Enable VBAT OVV detection */ 2325 ret = abx500_mask_and_set_register_interruptible(di->dev, 2326 AB8500_CHARGER, 2327 AB8500_BATT_OVV, 2328 BATT_OVV_ENA, 2329 BATT_OVV_ENA); 2330 if (ret) { 2331 dev_err(di->dev, "failed to enable BATT_OVV\n"); 2332 goto out; 2333 } 2334 2335 /* Low Battery Voltage */ 2336 ret = abx500_set_register_interruptible(di->dev, 2337 AB8500_SYS_CTRL2_BLOCK, 2338 AB8500_LOW_BAT_REG, 2339 ab8500_volt_to_regval( 2340 di->bm->fg_params->lowbat_threshold_uv) << 1 | 2341 LOW_BAT_ENABLE); 2342 if (ret) { 2343 dev_err(di->dev, "%s write failed\n", __func__); 2344 goto out; 2345 } 2346 2347 /* Battery OK threshold */ 2348 ret = ab8500_fg_battok_init_hw_register(di); 2349 if (ret) { 2350 dev_err(di->dev, "BattOk init write failed.\n"); 2351 goto out; 2352 } 2353 2354 if (is_ab8505(di->parent)) { 2355 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2356 AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time); 2357 2358 if (ret) { 2359 dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__); 2360 goto out; 2361 } 2362 2363 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2364 AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time); 2365 2366 if (ret) { 2367 dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__); 2368 goto out; 2369 } 2370 2371 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2372 AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart); 2373 2374 if (ret) { 2375 dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__); 2376 goto out; 2377 } 2378 2379 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2380 AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time); 2381 2382 if (ret) { 2383 dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__); 2384 goto out; 2385 } 2386 2387 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2388 AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable); 2389 2390 if (ret) { 2391 dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__); 2392 goto out; 2393 } 2394 } 2395 out: 2396 return ret; 2397 } 2398 2399 /** 2400 * ab8500_fg_external_power_changed() - callback for power supply changes 2401 * @psy: pointer to the structure power_supply 2402 * 2403 * This function is the entry point of the pointer external_power_changed 2404 * of the structure power_supply. 2405 * This function gets executed when there is a change in any external power 2406 * supply that this driver needs to be notified of. 2407 */ 2408 static void ab8500_fg_external_power_changed(struct power_supply *psy) 2409 { 2410 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2411 2412 class_for_each_device(power_supply_class, NULL, 2413 di->fg_psy, ab8500_fg_get_ext_psy_data); 2414 } 2415 2416 /** 2417 * ab8500_fg_reinit_work() - work to reset the FG algorithm 2418 * @work: pointer to the work_struct structure 2419 * 2420 * Used to reset the current battery capacity to be able to 2421 * retrigger a new voltage base capacity calculation. For 2422 * test and verification purpose. 2423 */ 2424 static void ab8500_fg_reinit_work(struct work_struct *work) 2425 { 2426 struct ab8500_fg *di = container_of(work, struct ab8500_fg, 2427 fg_reinit_work.work); 2428 2429 if (!di->flags.calibrate) { 2430 dev_dbg(di->dev, "Resetting FG state machine to init.\n"); 2431 ab8500_fg_clear_cap_samples(di); 2432 ab8500_fg_calc_cap_discharge_voltage(di); 2433 ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); 2434 ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); 2435 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 2436 2437 } else { 2438 dev_err(di->dev, "Residual offset calibration ongoing " 2439 "retrying..\n"); 2440 /* Wait one second until next try*/ 2441 queue_delayed_work(di->fg_wq, &di->fg_reinit_work, 2442 round_jiffies(1)); 2443 } 2444 } 2445 2446 /* Exposure to the sysfs interface */ 2447 2448 struct ab8500_fg_sysfs_entry { 2449 struct attribute attr; 2450 ssize_t (*show)(struct ab8500_fg *, char *); 2451 ssize_t (*store)(struct ab8500_fg *, const char *, size_t); 2452 }; 2453 2454 static ssize_t charge_full_show(struct ab8500_fg *di, char *buf) 2455 { 2456 return sprintf(buf, "%d\n", di->bat_cap.max_mah); 2457 } 2458 2459 static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf, 2460 size_t count) 2461 { 2462 unsigned long charge_full; 2463 int ret; 2464 2465 ret = kstrtoul(buf, 10, &charge_full); 2466 if (ret) 2467 return ret; 2468 2469 di->bat_cap.max_mah = (int) charge_full; 2470 return count; 2471 } 2472 2473 static ssize_t charge_now_show(struct ab8500_fg *di, char *buf) 2474 { 2475 return sprintf(buf, "%d\n", di->bat_cap.prev_mah); 2476 } 2477 2478 static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf, 2479 size_t count) 2480 { 2481 unsigned long charge_now; 2482 int ret; 2483 2484 ret = kstrtoul(buf, 10, &charge_now); 2485 if (ret) 2486 return ret; 2487 2488 di->bat_cap.user_mah = (int) charge_now; 2489 di->flags.user_cap = true; 2490 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 2491 return count; 2492 } 2493 2494 static struct ab8500_fg_sysfs_entry charge_full_attr = 2495 __ATTR(charge_full, 0644, charge_full_show, charge_full_store); 2496 2497 static struct ab8500_fg_sysfs_entry charge_now_attr = 2498 __ATTR(charge_now, 0644, charge_now_show, charge_now_store); 2499 2500 static ssize_t 2501 ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf) 2502 { 2503 struct ab8500_fg_sysfs_entry *entry; 2504 struct ab8500_fg *di; 2505 2506 entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); 2507 di = container_of(kobj, struct ab8500_fg, fg_kobject); 2508 2509 if (!entry->show) 2510 return -EIO; 2511 2512 return entry->show(di, buf); 2513 } 2514 static ssize_t 2515 ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf, 2516 size_t count) 2517 { 2518 struct ab8500_fg_sysfs_entry *entry; 2519 struct ab8500_fg *di; 2520 2521 entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr); 2522 di = container_of(kobj, struct ab8500_fg, fg_kobject); 2523 2524 if (!entry->store) 2525 return -EIO; 2526 2527 return entry->store(di, buf, count); 2528 } 2529 2530 static const struct sysfs_ops ab8500_fg_sysfs_ops = { 2531 .show = ab8500_fg_show, 2532 .store = ab8500_fg_store, 2533 }; 2534 2535 static struct attribute *ab8500_fg_attrs[] = { 2536 &charge_full_attr.attr, 2537 &charge_now_attr.attr, 2538 NULL, 2539 }; 2540 ATTRIBUTE_GROUPS(ab8500_fg); 2541 2542 static struct kobj_type ab8500_fg_ktype = { 2543 .sysfs_ops = &ab8500_fg_sysfs_ops, 2544 .default_groups = ab8500_fg_groups, 2545 }; 2546 2547 /** 2548 * ab8500_fg_sysfs_exit() - de-init of sysfs entry 2549 * @di: pointer to the struct ab8500_chargalg 2550 * 2551 * This function removes the entry in sysfs. 2552 */ 2553 static void ab8500_fg_sysfs_exit(struct ab8500_fg *di) 2554 { 2555 kobject_del(&di->fg_kobject); 2556 } 2557 2558 /** 2559 * ab8500_fg_sysfs_init() - init of sysfs entry 2560 * @di: pointer to the struct ab8500_chargalg 2561 * 2562 * This function adds an entry in sysfs. 2563 * Returns error code in case of failure else 0(on success) 2564 */ 2565 static int ab8500_fg_sysfs_init(struct ab8500_fg *di) 2566 { 2567 int ret = 0; 2568 2569 ret = kobject_init_and_add(&di->fg_kobject, 2570 &ab8500_fg_ktype, 2571 NULL, "battery"); 2572 if (ret < 0) { 2573 kobject_put(&di->fg_kobject); 2574 dev_err(di->dev, "failed to create sysfs entry\n"); 2575 } 2576 2577 return ret; 2578 } 2579 2580 static ssize_t ab8505_powercut_flagtime_read(struct device *dev, 2581 struct device_attribute *attr, 2582 char *buf) 2583 { 2584 int ret; 2585 u8 reg_value; 2586 struct power_supply *psy = dev_get_drvdata(dev); 2587 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2588 2589 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2590 AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value); 2591 2592 if (ret < 0) { 2593 dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n"); 2594 goto fail; 2595 } 2596 2597 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); 2598 2599 fail: 2600 return ret; 2601 } 2602 2603 static ssize_t ab8505_powercut_flagtime_write(struct device *dev, 2604 struct device_attribute *attr, 2605 const char *buf, size_t count) 2606 { 2607 int ret; 2608 int reg_value; 2609 struct power_supply *psy = dev_get_drvdata(dev); 2610 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2611 2612 if (kstrtoint(buf, 10, ®_value)) 2613 goto fail; 2614 2615 if (reg_value > 0x7F) { 2616 dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n"); 2617 goto fail; 2618 } 2619 2620 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2621 AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value); 2622 2623 if (ret < 0) 2624 dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n"); 2625 2626 fail: 2627 return count; 2628 } 2629 2630 static ssize_t ab8505_powercut_maxtime_read(struct device *dev, 2631 struct device_attribute *attr, 2632 char *buf) 2633 { 2634 int ret; 2635 u8 reg_value; 2636 struct power_supply *psy = dev_get_drvdata(dev); 2637 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2638 2639 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2640 AB8505_RTC_PCUT_MAX_TIME_REG, ®_value); 2641 2642 if (ret < 0) { 2643 dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n"); 2644 goto fail; 2645 } 2646 2647 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); 2648 2649 fail: 2650 return ret; 2651 2652 } 2653 2654 static ssize_t ab8505_powercut_maxtime_write(struct device *dev, 2655 struct device_attribute *attr, 2656 const char *buf, size_t count) 2657 { 2658 int ret; 2659 int reg_value; 2660 struct power_supply *psy = dev_get_drvdata(dev); 2661 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2662 2663 if (kstrtoint(buf, 10, ®_value)) 2664 goto fail; 2665 2666 if (reg_value > 0x7F) { 2667 dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n"); 2668 goto fail; 2669 } 2670 2671 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2672 AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value); 2673 2674 if (ret < 0) 2675 dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n"); 2676 2677 fail: 2678 return count; 2679 } 2680 2681 static ssize_t ab8505_powercut_restart_read(struct device *dev, 2682 struct device_attribute *attr, 2683 char *buf) 2684 { 2685 int ret; 2686 u8 reg_value; 2687 struct power_supply *psy = dev_get_drvdata(dev); 2688 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2689 2690 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2691 AB8505_RTC_PCUT_RESTART_REG, ®_value); 2692 2693 if (ret < 0) { 2694 dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); 2695 goto fail; 2696 } 2697 2698 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF)); 2699 2700 fail: 2701 return ret; 2702 } 2703 2704 static ssize_t ab8505_powercut_restart_write(struct device *dev, 2705 struct device_attribute *attr, 2706 const char *buf, size_t count) 2707 { 2708 int ret; 2709 int reg_value; 2710 struct power_supply *psy = dev_get_drvdata(dev); 2711 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2712 2713 if (kstrtoint(buf, 10, ®_value)) 2714 goto fail; 2715 2716 if (reg_value > 0xF) { 2717 dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n"); 2718 goto fail; 2719 } 2720 2721 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2722 AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value); 2723 2724 if (ret < 0) 2725 dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n"); 2726 2727 fail: 2728 return count; 2729 2730 } 2731 2732 static ssize_t ab8505_powercut_timer_read(struct device *dev, 2733 struct device_attribute *attr, 2734 char *buf) 2735 { 2736 int ret; 2737 u8 reg_value; 2738 struct power_supply *psy = dev_get_drvdata(dev); 2739 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2740 2741 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2742 AB8505_RTC_PCUT_TIME_REG, ®_value); 2743 2744 if (ret < 0) { 2745 dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n"); 2746 goto fail; 2747 } 2748 2749 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F)); 2750 2751 fail: 2752 return ret; 2753 } 2754 2755 static ssize_t ab8505_powercut_restart_counter_read(struct device *dev, 2756 struct device_attribute *attr, 2757 char *buf) 2758 { 2759 int ret; 2760 u8 reg_value; 2761 struct power_supply *psy = dev_get_drvdata(dev); 2762 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2763 2764 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2765 AB8505_RTC_PCUT_RESTART_REG, ®_value); 2766 2767 if (ret < 0) { 2768 dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n"); 2769 goto fail; 2770 } 2771 2772 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4); 2773 2774 fail: 2775 return ret; 2776 } 2777 2778 static ssize_t ab8505_powercut_read(struct device *dev, 2779 struct device_attribute *attr, 2780 char *buf) 2781 { 2782 int ret; 2783 u8 reg_value; 2784 struct power_supply *psy = dev_get_drvdata(dev); 2785 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2786 2787 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2788 AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); 2789 2790 if (ret < 0) 2791 goto fail; 2792 2793 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1)); 2794 2795 fail: 2796 return ret; 2797 } 2798 2799 static ssize_t ab8505_powercut_write(struct device *dev, 2800 struct device_attribute *attr, 2801 const char *buf, size_t count) 2802 { 2803 int ret; 2804 int reg_value; 2805 struct power_supply *psy = dev_get_drvdata(dev); 2806 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2807 2808 if (kstrtoint(buf, 10, ®_value)) 2809 goto fail; 2810 2811 if (reg_value > 0x1) { 2812 dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n"); 2813 goto fail; 2814 } 2815 2816 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2817 AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value); 2818 2819 if (ret < 0) 2820 dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n"); 2821 2822 fail: 2823 return count; 2824 } 2825 2826 static ssize_t ab8505_powercut_flag_read(struct device *dev, 2827 struct device_attribute *attr, 2828 char *buf) 2829 { 2830 2831 int ret; 2832 u8 reg_value; 2833 struct power_supply *psy = dev_get_drvdata(dev); 2834 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2835 2836 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2837 AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); 2838 2839 if (ret < 0) { 2840 dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); 2841 goto fail; 2842 } 2843 2844 return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4)); 2845 2846 fail: 2847 return ret; 2848 } 2849 2850 static ssize_t ab8505_powercut_debounce_read(struct device *dev, 2851 struct device_attribute *attr, 2852 char *buf) 2853 { 2854 int ret; 2855 u8 reg_value; 2856 struct power_supply *psy = dev_get_drvdata(dev); 2857 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2858 2859 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2860 AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value); 2861 2862 if (ret < 0) { 2863 dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n"); 2864 goto fail; 2865 } 2866 2867 return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7)); 2868 2869 fail: 2870 return ret; 2871 } 2872 2873 static ssize_t ab8505_powercut_debounce_write(struct device *dev, 2874 struct device_attribute *attr, 2875 const char *buf, size_t count) 2876 { 2877 int ret; 2878 int reg_value; 2879 struct power_supply *psy = dev_get_drvdata(dev); 2880 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2881 2882 if (kstrtoint(buf, 10, ®_value)) 2883 goto fail; 2884 2885 if (reg_value > 0x7) { 2886 dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n"); 2887 goto fail; 2888 } 2889 2890 ret = abx500_set_register_interruptible(di->dev, AB8500_RTC, 2891 AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value); 2892 2893 if (ret < 0) 2894 dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n"); 2895 2896 fail: 2897 return count; 2898 } 2899 2900 static ssize_t ab8505_powercut_enable_status_read(struct device *dev, 2901 struct device_attribute *attr, 2902 char *buf) 2903 { 2904 int ret; 2905 u8 reg_value; 2906 struct power_supply *psy = dev_get_drvdata(dev); 2907 struct ab8500_fg *di = power_supply_get_drvdata(psy); 2908 2909 ret = abx500_get_register_interruptible(di->dev, AB8500_RTC, 2910 AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value); 2911 2912 if (ret < 0) { 2913 dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n"); 2914 goto fail; 2915 } 2916 2917 return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5)); 2918 2919 fail: 2920 return ret; 2921 } 2922 2923 static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = { 2924 __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP), 2925 ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write), 2926 __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP), 2927 ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write), 2928 __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP), 2929 ab8505_powercut_restart_read, ab8505_powercut_restart_write), 2930 __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL), 2931 __ATTR(powercut_restart_counter, S_IRUGO, 2932 ab8505_powercut_restart_counter_read, NULL), 2933 __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP), 2934 ab8505_powercut_read, ab8505_powercut_write), 2935 __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL), 2936 __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP), 2937 ab8505_powercut_debounce_read, ab8505_powercut_debounce_write), 2938 __ATTR(powercut_enable_status, S_IRUGO, 2939 ab8505_powercut_enable_status_read, NULL), 2940 }; 2941 2942 static int ab8500_fg_sysfs_psy_create_attrs(struct ab8500_fg *di) 2943 { 2944 unsigned int i; 2945 2946 if (is_ab8505(di->parent)) { 2947 for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) 2948 if (device_create_file(&di->fg_psy->dev, 2949 &ab8505_fg_sysfs_psy_attrs[i])) 2950 goto sysfs_psy_create_attrs_failed_ab8505; 2951 } 2952 return 0; 2953 sysfs_psy_create_attrs_failed_ab8505: 2954 dev_err(&di->fg_psy->dev, "Failed creating sysfs psy attrs for ab8505.\n"); 2955 while (i--) 2956 device_remove_file(&di->fg_psy->dev, 2957 &ab8505_fg_sysfs_psy_attrs[i]); 2958 2959 return -EIO; 2960 } 2961 2962 static void ab8500_fg_sysfs_psy_remove_attrs(struct ab8500_fg *di) 2963 { 2964 unsigned int i; 2965 2966 if (is_ab8505(di->parent)) { 2967 for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++) 2968 (void)device_remove_file(&di->fg_psy->dev, 2969 &ab8505_fg_sysfs_psy_attrs[i]); 2970 } 2971 } 2972 2973 /* Exposure to the sysfs interface <<END>> */ 2974 2975 static int __maybe_unused ab8500_fg_resume(struct device *dev) 2976 { 2977 struct ab8500_fg *di = dev_get_drvdata(dev); 2978 2979 /* 2980 * Change state if we're not charging. If we're charging we will wake 2981 * up on the FG IRQ 2982 */ 2983 if (!di->flags.charging) { 2984 ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_WAKEUP); 2985 queue_work(di->fg_wq, &di->fg_work); 2986 } 2987 2988 return 0; 2989 } 2990 2991 static int __maybe_unused ab8500_fg_suspend(struct device *dev) 2992 { 2993 struct ab8500_fg *di = dev_get_drvdata(dev); 2994 2995 flush_delayed_work(&di->fg_periodic_work); 2996 flush_work(&di->fg_work); 2997 flush_work(&di->fg_acc_cur_work); 2998 flush_delayed_work(&di->fg_reinit_work); 2999 flush_delayed_work(&di->fg_low_bat_work); 3000 flush_delayed_work(&di->fg_check_hw_failure_work); 3001 3002 /* 3003 * If the FG is enabled we will disable it before going to suspend 3004 * only if we're not charging 3005 */ 3006 if (di->flags.fg_enabled && !di->flags.charging) 3007 ab8500_fg_coulomb_counter(di, false); 3008 3009 return 0; 3010 } 3011 3012 /* ab8500 fg driver interrupts and their respective isr */ 3013 static struct ab8500_fg_interrupts ab8500_fg_irq[] = { 3014 {"NCONV_ACCU", ab8500_fg_cc_convend_handler}, 3015 {"BATT_OVV", ab8500_fg_batt_ovv_handler}, 3016 {"LOW_BAT_F", ab8500_fg_lowbatf_handler}, 3017 {"CC_INT_CALIB", ab8500_fg_cc_int_calib_handler}, 3018 {"CCEOC", ab8500_fg_cc_data_end_handler}, 3019 }; 3020 3021 static char *supply_interface[] = { 3022 "ab8500_chargalg", 3023 "ab8500_usb", 3024 }; 3025 3026 static const struct power_supply_desc ab8500_fg_desc = { 3027 .name = "ab8500_fg", 3028 .type = POWER_SUPPLY_TYPE_BATTERY, 3029 .properties = ab8500_fg_props, 3030 .num_properties = ARRAY_SIZE(ab8500_fg_props), 3031 .get_property = ab8500_fg_get_property, 3032 .external_power_changed = ab8500_fg_external_power_changed, 3033 }; 3034 3035 static int ab8500_fg_bind(struct device *dev, struct device *master, 3036 void *data) 3037 { 3038 struct ab8500_fg *di = dev_get_drvdata(dev); 3039 3040 di->bat_cap.max_mah_design = di->bm->bi->charge_full_design_uah; 3041 di->bat_cap.max_mah = di->bat_cap.max_mah_design; 3042 di->vbat_nom_uv = di->bm->bi->voltage_max_design_uv; 3043 3044 /* Start the coulomb counter */ 3045 ab8500_fg_coulomb_counter(di, true); 3046 /* Run the FG algorithm */ 3047 queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0); 3048 3049 return 0; 3050 } 3051 3052 static void ab8500_fg_unbind(struct device *dev, struct device *master, 3053 void *data) 3054 { 3055 struct ab8500_fg *di = dev_get_drvdata(dev); 3056 int ret; 3057 3058 /* Disable coulomb counter */ 3059 ret = ab8500_fg_coulomb_counter(di, false); 3060 if (ret) 3061 dev_err(dev, "failed to disable coulomb counter\n"); 3062 3063 flush_workqueue(di->fg_wq); 3064 } 3065 3066 static const struct component_ops ab8500_fg_component_ops = { 3067 .bind = ab8500_fg_bind, 3068 .unbind = ab8500_fg_unbind, 3069 }; 3070 3071 static int ab8500_fg_probe(struct platform_device *pdev) 3072 { 3073 struct device *dev = &pdev->dev; 3074 struct power_supply_config psy_cfg = {}; 3075 struct ab8500_fg *di; 3076 int i, irq; 3077 int ret = 0; 3078 3079 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); 3080 if (!di) 3081 return -ENOMEM; 3082 3083 di->bm = &ab8500_bm_data; 3084 3085 mutex_init(&di->cc_lock); 3086 3087 /* get parent data */ 3088 di->dev = dev; 3089 di->parent = dev_get_drvdata(pdev->dev.parent); 3090 3091 di->main_bat_v = devm_iio_channel_get(dev, "main_bat_v"); 3092 if (IS_ERR(di->main_bat_v)) { 3093 ret = dev_err_probe(dev, PTR_ERR(di->main_bat_v), 3094 "failed to get main battery ADC channel\n"); 3095 return ret; 3096 } 3097 3098 if (!of_property_read_u32(dev->of_node, "line-impedance-micro-ohms", 3099 &di->line_impedance_uohm)) 3100 dev_info(dev, "line impedance: %u uOhm\n", 3101 di->line_impedance_uohm); 3102 3103 psy_cfg.supplied_to = supply_interface; 3104 psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 3105 psy_cfg.drv_data = di; 3106 3107 di->init_capacity = true; 3108 3109 ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT); 3110 ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT); 3111 3112 /* Create a work queue for running the FG algorithm */ 3113 di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM); 3114 if (di->fg_wq == NULL) { 3115 dev_err(dev, "failed to create work queue\n"); 3116 return -ENOMEM; 3117 } 3118 3119 /* Init work for running the fg algorithm instantly */ 3120 INIT_WORK(&di->fg_work, ab8500_fg_instant_work); 3121 3122 /* Init work for getting the battery accumulated current */ 3123 INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work); 3124 3125 /* Init work for reinitialising the fg algorithm */ 3126 INIT_DEFERRABLE_WORK(&di->fg_reinit_work, 3127 ab8500_fg_reinit_work); 3128 3129 /* Work delayed Queue to run the state machine */ 3130 INIT_DEFERRABLE_WORK(&di->fg_periodic_work, 3131 ab8500_fg_periodic_work); 3132 3133 /* Work to check low battery condition */ 3134 INIT_DEFERRABLE_WORK(&di->fg_low_bat_work, 3135 ab8500_fg_low_bat_work); 3136 3137 /* Init work for HW failure check */ 3138 INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work, 3139 ab8500_fg_check_hw_failure_work); 3140 3141 /* Reset battery low voltage flag */ 3142 di->flags.low_bat = false; 3143 3144 /* Initialize low battery counter */ 3145 di->low_bat_cnt = 10; 3146 3147 /* Initialize OVV, and other registers */ 3148 ret = ab8500_fg_init_hw_registers(di); 3149 if (ret) { 3150 dev_err(dev, "failed to initialize registers\n"); 3151 destroy_workqueue(di->fg_wq); 3152 return ret; 3153 } 3154 3155 /* Consider battery unknown until we're informed otherwise */ 3156 di->flags.batt_unknown = true; 3157 di->flags.batt_id_received = false; 3158 3159 /* Register FG power supply class */ 3160 di->fg_psy = devm_power_supply_register(dev, &ab8500_fg_desc, &psy_cfg); 3161 if (IS_ERR(di->fg_psy)) { 3162 dev_err(dev, "failed to register FG psy\n"); 3163 destroy_workqueue(di->fg_wq); 3164 return PTR_ERR(di->fg_psy); 3165 } 3166 3167 di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer); 3168 3169 /* 3170 * Initialize completion used to notify completion and start 3171 * of inst current 3172 */ 3173 init_completion(&di->ab8500_fg_started); 3174 init_completion(&di->ab8500_fg_complete); 3175 3176 /* Register primary interrupt handlers */ 3177 for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq); i++) { 3178 irq = platform_get_irq_byname(pdev, ab8500_fg_irq[i].name); 3179 if (irq < 0) { 3180 destroy_workqueue(di->fg_wq); 3181 return irq; 3182 } 3183 3184 ret = devm_request_threaded_irq(dev, irq, NULL, 3185 ab8500_fg_irq[i].isr, 3186 IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, 3187 ab8500_fg_irq[i].name, di); 3188 3189 if (ret != 0) { 3190 dev_err(dev, "failed to request %s IRQ %d: %d\n", 3191 ab8500_fg_irq[i].name, irq, ret); 3192 destroy_workqueue(di->fg_wq); 3193 return ret; 3194 } 3195 dev_dbg(dev, "Requested %s IRQ %d: %d\n", 3196 ab8500_fg_irq[i].name, irq, ret); 3197 } 3198 3199 di->irq = platform_get_irq_byname(pdev, "CCEOC"); 3200 disable_irq(di->irq); 3201 di->nbr_cceoc_irq_cnt = 0; 3202 3203 platform_set_drvdata(pdev, di); 3204 3205 ret = ab8500_fg_sysfs_init(di); 3206 if (ret) { 3207 dev_err(dev, "failed to create sysfs entry\n"); 3208 destroy_workqueue(di->fg_wq); 3209 return ret; 3210 } 3211 3212 ret = ab8500_fg_sysfs_psy_create_attrs(di); 3213 if (ret) { 3214 dev_err(dev, "failed to create FG psy\n"); 3215 ab8500_fg_sysfs_exit(di); 3216 destroy_workqueue(di->fg_wq); 3217 return ret; 3218 } 3219 3220 /* Calibrate the fg first time */ 3221 di->flags.calibrate = true; 3222 di->calib_state = AB8500_FG_CALIB_INIT; 3223 3224 /* Use room temp as default value until we get an update from driver. */ 3225 di->bat_temp = 210; 3226 3227 list_add_tail(&di->node, &ab8500_fg_list); 3228 3229 return component_add(dev, &ab8500_fg_component_ops); 3230 } 3231 3232 static int ab8500_fg_remove(struct platform_device *pdev) 3233 { 3234 struct ab8500_fg *di = platform_get_drvdata(pdev); 3235 3236 destroy_workqueue(di->fg_wq); 3237 component_del(&pdev->dev, &ab8500_fg_component_ops); 3238 list_del(&di->node); 3239 ab8500_fg_sysfs_exit(di); 3240 ab8500_fg_sysfs_psy_remove_attrs(di); 3241 3242 return 0; 3243 } 3244 3245 static SIMPLE_DEV_PM_OPS(ab8500_fg_pm_ops, ab8500_fg_suspend, ab8500_fg_resume); 3246 3247 static const struct of_device_id ab8500_fg_match[] = { 3248 { .compatible = "stericsson,ab8500-fg", }, 3249 { }, 3250 }; 3251 MODULE_DEVICE_TABLE(of, ab8500_fg_match); 3252 3253 struct platform_driver ab8500_fg_driver = { 3254 .probe = ab8500_fg_probe, 3255 .remove = ab8500_fg_remove, 3256 .driver = { 3257 .name = "ab8500-fg", 3258 .of_match_table = ab8500_fg_match, 3259 .pm = &ab8500_fg_pm_ops, 3260 }, 3261 }; 3262 MODULE_LICENSE("GPL v2"); 3263 MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); 3264 MODULE_ALIAS("platform:ab8500-fg"); 3265 MODULE_DESCRIPTION("AB8500 Fuel Gauge driver"); 3266