Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 | /* * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver * * Copyright (C) 2014 Intel Corporation * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/regmap.h> #include <linux/jiffies.h> #include <linux/interrupt.h> #include <linux/workqueue.h> #include <linux/mfd/axp20x.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/iio/consumer.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <asm/unaligned.h> #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) #define CHRG_STAT_BAT_VALID (1 << 4) #define CHRG_STAT_BAT_PRESENT (1 << 5) #define CHRG_STAT_CHARGING (1 << 6) #define CHRG_STAT_PMIC_OTP (1 << 7) #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ #define CHRG_CCCV_CC_BIT_POS 0 #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ #define CHRG_CCCV_CV_BIT_POS 5 #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ #define CHRG_CCCV_CHG_EN (1 << 7) #define CV_4100 4100 /* 4100mV */ #define CV_4150 4150 /* 4150mV */ #define CV_4200 4200 /* 4200mV */ #define CV_4350 4350 /* 4350mV */ #define TEMP_IRQ_CFG_QWBTU (1 << 0) #define TEMP_IRQ_CFG_WBTU (1 << 1) #define TEMP_IRQ_CFG_QWBTO (1 << 2) #define TEMP_IRQ_CFG_WBTO (1 << 3) #define TEMP_IRQ_CFG_MASK 0xf #define FG_IRQ_CFG_LOWBATT_WL2 (1 << 0) #define FG_IRQ_CFG_LOWBATT_WL1 (1 << 1) #define FG_IRQ_CFG_LOWBATT_MASK 0x3 #define LOWBAT_IRQ_STAT_LOWBATT_WL2 (1 << 0) #define LOWBAT_IRQ_STAT_LOWBATT_WL1 (1 << 1) #define FG_CNTL_OCV_ADJ_STAT (1 << 2) #define FG_CNTL_OCV_ADJ_EN (1 << 3) #define FG_CNTL_CAP_ADJ_STAT (1 << 4) #define FG_CNTL_CAP_ADJ_EN (1 << 5) #define FG_CNTL_CC_EN (1 << 6) #define FG_CNTL_GAUGE_EN (1 << 7) #define FG_15BIT_WORD_VALID (1 << 15) #define FG_15BIT_VAL_MASK 0x7fff #define FG_REP_CAP_VALID (1 << 7) #define FG_REP_CAP_VAL_MASK 0x7F #define FG_DES_CAP1_VALID (1 << 7) #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */ #define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */ #define FG_OCV_CAP_VALID (1 << 7) #define FG_OCV_CAP_VAL_MASK 0x7F #define FG_CC_CAP_VALID (1 << 7) #define FG_CC_CAP_VAL_MASK 0x7F #define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */ #define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */ #define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */ #define FG_LOW_CAP_WARN_THR 14 /* 14 perc */ #define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */ #define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */ #define STATUS_MON_DELAY_JIFFIES (HZ * 60) /*60 sec */ #define NR_RETRY_CNT 3 #define DEV_NAME "axp288_fuel_gauge" /* 1.1mV per LSB expressed in uV */ #define VOLTAGE_FROM_ADC(a) ((a * 11) / 10) /* properties converted to tenths of degrees, uV, uA, uW */ #define PROP_TEMP(a) ((a) * 10) #define UNPROP_TEMP(a) ((a) / 10) #define PROP_VOLT(a) ((a) * 1000) #define PROP_CURR(a) ((a) * 1000) #define AXP288_FG_INTR_NUM 6 enum { QWBTU_IRQ = 0, WBTU_IRQ, QWBTO_IRQ, WBTO_IRQ, WL2_IRQ, WL1_IRQ, }; struct axp288_fg_info { struct platform_device *pdev; struct axp20x_fg_pdata *pdata; struct regmap *regmap; struct regmap_irq_chip_data *regmap_irqc; int irq[AXP288_FG_INTR_NUM]; struct power_supply *bat; struct mutex lock; int status; struct delayed_work status_monitor; struct dentry *debug_file; }; static enum power_supply_property fuel_gauge_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_VOLTAGE_OCV, POWER_SUPPLY_PROP_CURRENT_NOW, POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_TEMP_MAX, POWER_SUPPLY_PROP_TEMP_MIN, POWER_SUPPLY_PROP_TEMP_ALERT_MIN, POWER_SUPPLY_PROP_TEMP_ALERT_MAX, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_CHARGE_FULL, POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, POWER_SUPPLY_PROP_MODEL_NAME, }; static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg) { int ret, i; unsigned int val; for (i = 0; i < NR_RETRY_CNT; i++) { ret = regmap_read(info->regmap, reg, &val); if (ret == -EBUSY) continue; else break; } if (ret < 0) { dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret); return ret; } return val; } static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val) { int ret; ret = regmap_write(info->regmap, reg, (unsigned int)val); if (ret < 0) dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret); return ret; } static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg) { unsigned char buf[2]; int ret; ret = regmap_bulk_read(info->regmap, reg, buf, 2); if (ret < 0) { dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n", reg, ret); return ret; } ret = get_unaligned_be16(buf); if (!(ret & FG_15BIT_WORD_VALID)) { dev_err(&info->pdev->dev, "Error reg 0x%02x contents not valid\n", reg); return -ENXIO; } return ret & FG_15BIT_VAL_MASK; } static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg) { unsigned char buf[2]; int ret; ret = regmap_bulk_read(info->regmap, reg, buf, 2); if (ret < 0) { dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n", reg, ret); return ret; } /* 12-bit data values have upper 8 bits in buf[0], lower 4 in buf[1] */ return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f); } static int pmic_read_adc_val(const char *name, int *raw_val, struct axp288_fg_info *info) { int ret, val = 0; struct iio_channel *indio_chan; indio_chan = iio_channel_get(NULL, name); if (IS_ERR_OR_NULL(indio_chan)) { ret = PTR_ERR(indio_chan); goto exit; } ret = iio_read_channel_raw(indio_chan, &val); if (ret < 0) { dev_err(&info->pdev->dev, "IIO channel read error: %x, %x\n", ret, val); goto err_exit; } dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val); *raw_val = val; err_exit: iio_channel_release(indio_chan); exit: return ret; } #ifdef CONFIG_DEBUG_FS static int fuel_gauge_debug_show(struct seq_file *s, void *data) { struct axp288_fg_info *info = s->private; int raw_val, ret; seq_printf(s, " PWR_STATUS[%02x] : %02x\n", AXP20X_PWR_INPUT_STATUS, fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS)); seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n", AXP20X_PWR_OP_MODE, fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE)); seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n", AXP20X_CHRG_CTRL1, fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1)); seq_printf(s, " VLTF[%02x] : %02x\n", AXP20X_V_LTF_DISCHRG, fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG)); seq_printf(s, " VHTF[%02x] : %02x\n", AXP20X_V_HTF_DISCHRG, fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG)); seq_printf(s, " CC_CTRL[%02x] : %02x\n", AXP20X_CC_CTRL, fuel_gauge_reg_readb(info, AXP20X_CC_CTRL)); seq_printf(s, "BATTERY CAP[%02x] : %02x\n", AXP20X_FG_RES, fuel_gauge_reg_readb(info, AXP20X_FG_RES)); seq_printf(s, " FG_RDC1[%02x] : %02x\n", AXP288_FG_RDC1_REG, fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG)); seq_printf(s, " FG_RDC0[%02x] : %02x\n", AXP288_FG_RDC0_REG, fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG)); seq_printf(s, " FG_OCV[%02x] : %04x\n", AXP288_FG_OCVH_REG, fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG)); seq_printf(s, " FG_DES_CAP[%02x] : %04x\n", AXP288_FG_DES_CAP1_REG, fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG)); seq_printf(s, " FG_CC_MTR[%02x] : %04x\n", AXP288_FG_CC_MTR1_REG, fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG)); seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n", AXP288_FG_OCV_CAP_REG, fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG)); seq_printf(s, " FG_CC_CAP[%02x] : %02x\n", AXP288_FG_CC_CAP_REG, fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG)); seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n", AXP288_FG_LOW_CAP_REG, fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG)); seq_printf(s, "TUNING_CTL0[%02x] : %02x\n", AXP288_FG_TUNE0, fuel_gauge_reg_readb(info, AXP288_FG_TUNE0)); seq_printf(s, "TUNING_CTL1[%02x] : %02x\n", AXP288_FG_TUNE1, fuel_gauge_reg_readb(info, AXP288_FG_TUNE1)); seq_printf(s, "TUNING_CTL2[%02x] : %02x\n", AXP288_FG_TUNE2, fuel_gauge_reg_readb(info, AXP288_FG_TUNE2)); seq_printf(s, "TUNING_CTL3[%02x] : %02x\n", AXP288_FG_TUNE3, fuel_gauge_reg_readb(info, AXP288_FG_TUNE3)); seq_printf(s, "TUNING_CTL4[%02x] : %02x\n", AXP288_FG_TUNE4, fuel_gauge_reg_readb(info, AXP288_FG_TUNE4)); seq_printf(s, "TUNING_CTL5[%02x] : %02x\n", AXP288_FG_TUNE5, fuel_gauge_reg_readb(info, AXP288_FG_TUNE5)); ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); if (ret >= 0) seq_printf(s, "axp288-batttemp : %d\n", raw_val); ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info); if (ret >= 0) seq_printf(s, "axp288-pmictemp : %d\n", raw_val); ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info); if (ret >= 0) seq_printf(s, "axp288-systtemp : %d\n", raw_val); ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info); if (ret >= 0) seq_printf(s, "axp288-chrgcurr : %d\n", raw_val); ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info); if (ret >= 0) seq_printf(s, "axp288-dchrgcur : %d\n", raw_val); ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); if (ret >= 0) seq_printf(s, "axp288-battvolt : %d\n", raw_val); return 0; } static int debug_open(struct inode *inode, struct file *file) { return single_open(file, fuel_gauge_debug_show, inode->i_private); } static const struct file_operations fg_debug_fops = { .open = debug_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void fuel_gauge_create_debugfs(struct axp288_fg_info *info) { info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL, info, &fg_debug_fops); } static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) { debugfs_remove(info->debug_file); } #else static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info) { } static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) { } #endif static void fuel_gauge_get_status(struct axp288_fg_info *info) { int pwr_stat, ret; int charge, discharge; pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS); if (pwr_stat < 0) { dev_err(&info->pdev->dev, "PWR STAT read failed:%d\n", pwr_stat); return; } ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); if (ret < 0) { dev_err(&info->pdev->dev, "ADC charge current read failed:%d\n", ret); return; } ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); if (ret < 0) { dev_err(&info->pdev->dev, "ADC discharge current read failed:%d\n", ret); return; } if (charge > 0) info->status = POWER_SUPPLY_STATUS_CHARGING; else if (discharge > 0) info->status = POWER_SUPPLY_STATUS_DISCHARGING; else { if (pwr_stat & CHRG_STAT_BAT_PRESENT) info->status = POWER_SUPPLY_STATUS_FULL; else info->status = POWER_SUPPLY_STATUS_NOT_CHARGING; } } static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt) { int ret = 0, raw_val; ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); if (ret < 0) goto vbatt_read_fail; *vbatt = VOLTAGE_FROM_ADC(raw_val); vbatt_read_fail: return ret; } static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur) { int ret, value = 0; int charge, discharge; ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); if (ret < 0) goto current_read_fail; ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); if (ret < 0) goto current_read_fail; if (charge > 0) value = charge; else if (discharge > 0) value = -1 * discharge; *cur = value; current_read_fail: return ret; } static int temp_to_adc(struct axp288_fg_info *info, int tval) { int rntc = 0, i, ret, adc_val; int rmin, rmax, tmin, tmax; int tcsz = info->pdata->tcsz; /* get the Rntc resitance value for this temp */ if (tval > info->pdata->thermistor_curve[0][1]) { rntc = info->pdata->thermistor_curve[0][0]; } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) { rntc = info->pdata->thermistor_curve[tcsz-1][0]; } else { for (i = 1; i < tcsz; i++) { if (tval > info->pdata->thermistor_curve[i][1]) { rmin = info->pdata->thermistor_curve[i-1][0]; rmax = info->pdata->thermistor_curve[i][0]; tmin = info->pdata->thermistor_curve[i-1][1]; tmax = info->pdata->thermistor_curve[i][1]; rntc = rmin + ((rmax - rmin) * (tval - tmin) / (tmax - tmin)); break; } } } /* we need the current to calculate the proper adc voltage */ ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); if (ret < 0) { dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); ret = 0x30; } /* * temperature is proportional to NTS thermistor resistance * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA * [12-bit ADC VAL] = R_NTC(Ω) * current / 800 */ adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800; return adc_val; } static int adc_to_temp(struct axp288_fg_info *info, int adc_val) { int ret, r, i, tval = 0; int rmin, rmax, tmin, tmax; int tcsz = info->pdata->tcsz; ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); if (ret < 0) { dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); ret = 0x30; } /* * temperature is proportional to NTS thermistor resistance * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current */ r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3))); if (r < info->pdata->thermistor_curve[0][0]) { tval = info->pdata->thermistor_curve[0][1]; } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) { tval = info->pdata->thermistor_curve[tcsz-1][1]; } else { for (i = 1; i < tcsz; i++) { if (r < info->pdata->thermistor_curve[i][0]) { rmin = info->pdata->thermistor_curve[i-1][0]; rmax = info->pdata->thermistor_curve[i][0]; tmin = info->pdata->thermistor_curve[i-1][1]; tmax = info->pdata->thermistor_curve[i][1]; tval = tmin + ((tmax - tmin) * (r - rmin) / (rmax - rmin)); break; } } } return tval; } static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp) { int ret, raw_val = 0; ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); if (ret < 0) goto temp_read_fail; *btemp = adc_to_temp(info, raw_val); temp_read_fail: return ret; } static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv) { int ret; ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG); if (ret >= 0) *vocv = VOLTAGE_FROM_ADC(ret); return ret; } static int fuel_gauge_battery_health(struct axp288_fg_info *info) { int temp, vocv; int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN; ret = fuel_gauge_get_btemp(info, &temp); if (ret < 0) goto health_read_fail; ret = fuel_gauge_get_vocv(info, &vocv); if (ret < 0) goto health_read_fail; if (vocv > info->pdata->max_volt) health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; else if (temp > info->pdata->max_temp) health = POWER_SUPPLY_HEALTH_OVERHEAT; else if (temp < info->pdata->min_temp) health = POWER_SUPPLY_HEALTH_COLD; else if (vocv < info->pdata->min_volt) health = POWER_SUPPLY_HEALTH_DEAD; else health = POWER_SUPPLY_HEALTH_GOOD; health_read_fail: return health; } static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info) { int ret, adc_val; /* program temperature threshold as 1/16 ADC value */ adc_val = temp_to_adc(info, info->pdata->max_temp); ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4); return ret; } static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info) { int ret, adc_val; /* program temperature threshold as 1/16 ADC value */ adc_val = temp_to_adc(info, info->pdata->min_temp); ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4); return ret; } static int fuel_gauge_get_property(struct power_supply *ps, enum power_supply_property prop, union power_supply_propval *val) { struct axp288_fg_info *info = power_supply_get_drvdata(ps); int ret = 0, value; mutex_lock(&info->lock); switch (prop) { case POWER_SUPPLY_PROP_STATUS: fuel_gauge_get_status(info); val->intval = info->status; break; case POWER_SUPPLY_PROP_HEALTH: val->intval = fuel_gauge_battery_health(info); break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: ret = fuel_gauge_get_vbatt(info, &value); if (ret < 0) goto fuel_gauge_read_err; val->intval = PROP_VOLT(value); break; case POWER_SUPPLY_PROP_VOLTAGE_OCV: ret = fuel_gauge_get_vocv(info, &value); if (ret < 0) goto fuel_gauge_read_err; val->intval = PROP_VOLT(value); break; case POWER_SUPPLY_PROP_CURRENT_NOW: ret = fuel_gauge_get_current(info, &value); if (ret < 0) goto fuel_gauge_read_err; val->intval = PROP_CURR(value); break; case POWER_SUPPLY_PROP_PRESENT: ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE); if (ret < 0) goto fuel_gauge_read_err; if (ret & CHRG_STAT_BAT_PRESENT) val->intval = 1; else val->intval = 0; break; case POWER_SUPPLY_PROP_CAPACITY: ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); if (ret < 0) goto fuel_gauge_read_err; if (!(ret & FG_REP_CAP_VALID)) dev_err(&info->pdev->dev, "capacity measurement not valid\n"); val->intval = (ret & FG_REP_CAP_VAL_MASK); break; case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); if (ret < 0) goto fuel_gauge_read_err; val->intval = (ret & 0x0f); break; case POWER_SUPPLY_PROP_TEMP: ret = fuel_gauge_get_btemp(info, &value); if (ret < 0) goto fuel_gauge_read_err; val->intval = PROP_TEMP(value); break; case POWER_SUPPLY_PROP_TEMP_MAX: case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: val->intval = PROP_TEMP(info->pdata->max_temp); break; case POWER_SUPPLY_PROP_TEMP_MIN: case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: val->intval = PROP_TEMP(info->pdata->min_temp); break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; case POWER_SUPPLY_PROP_CHARGE_NOW: ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG); if (ret < 0) goto fuel_gauge_read_err; val->intval = ret * FG_DES_CAP_RES_LSB; break; case POWER_SUPPLY_PROP_CHARGE_FULL: ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG); if (ret < 0) goto fuel_gauge_read_err; val->intval = ret * FG_DES_CAP_RES_LSB; break; case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: val->intval = PROP_CURR(info->pdata->design_cap); break; case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: val->intval = PROP_VOLT(info->pdata->max_volt); break; case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: val->intval = PROP_VOLT(info->pdata->min_volt); break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = info->pdata->battid; break; default: mutex_unlock(&info->lock); return -EINVAL; } mutex_unlock(&info->lock); return 0; fuel_gauge_read_err: mutex_unlock(&info->lock); return ret; } static int fuel_gauge_set_property(struct power_supply *ps, enum power_supply_property prop, const union power_supply_propval *val) { struct axp288_fg_info *info = power_supply_get_drvdata(ps); int ret = 0; mutex_lock(&info->lock); switch (prop) { case POWER_SUPPLY_PROP_STATUS: info->status = val->intval; break; case POWER_SUPPLY_PROP_TEMP_MIN: case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: if ((val->intval < PD_DEF_MIN_TEMP) || (val->intval > PD_DEF_MAX_TEMP)) { ret = -EINVAL; break; } info->pdata->min_temp = UNPROP_TEMP(val->intval); ret = fuel_gauge_set_low_btemp_alert(info); if (ret < 0) dev_err(&info->pdev->dev, "temp alert min set fail:%d\n", ret); break; case POWER_SUPPLY_PROP_TEMP_MAX: case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: if ((val->intval < PD_DEF_MIN_TEMP) || (val->intval > PD_DEF_MAX_TEMP)) { ret = -EINVAL; break; } info->pdata->max_temp = UNPROP_TEMP(val->intval); ret = fuel_gauge_set_high_btemp_alert(info); if (ret < 0) dev_err(&info->pdev->dev, "temp alert max set fail:%d\n", ret); break; case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: if ((val->intval < 0) || (val->intval > 15)) { ret = -EINVAL; break; } ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); if (ret < 0) break; ret &= 0xf0; ret |= (val->intval & 0xf); ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret); break; default: ret = -EINVAL; break; } mutex_unlock(&info->lock); return ret; } static int fuel_gauge_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { int ret; switch (psp) { case POWER_SUPPLY_PROP_STATUS: case POWER_SUPPLY_PROP_TEMP_MIN: case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: case POWER_SUPPLY_PROP_TEMP_MAX: case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: ret = 1; break; default: ret = 0; } return ret; } static void fuel_gauge_status_monitor(struct work_struct *work) { struct axp288_fg_info *info = container_of(work, struct axp288_fg_info, status_monitor.work); fuel_gauge_get_status(info); power_supply_changed(info->bat); schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); } static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev) { struct axp288_fg_info *info = dev; int i; for (i = 0; i < AXP288_FG_INTR_NUM; i++) { if (info->irq[i] == irq) break; } if (i >= AXP288_FG_INTR_NUM) { dev_warn(&info->pdev->dev, "spurious interrupt!!\n"); return IRQ_NONE; } switch (i) { case QWBTU_IRQ: dev_info(&info->pdev->dev, "Quit Battery under temperature in work mode IRQ (QWBTU)\n"); break; case WBTU_IRQ: dev_info(&info->pdev->dev, "Battery under temperature in work mode IRQ (WBTU)\n"); break; case QWBTO_IRQ: dev_info(&info->pdev->dev, "Quit Battery over temperature in work mode IRQ (QWBTO)\n"); break; case WBTO_IRQ: dev_info(&info->pdev->dev, "Battery over temperature in work mode IRQ (WBTO)\n"); break; case WL2_IRQ: dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n"); break; case WL1_IRQ: dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n"); break; default: dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); } power_supply_changed(info->bat); return IRQ_HANDLED; } static void fuel_gauge_external_power_changed(struct power_supply *psy) { struct axp288_fg_info *info = power_supply_get_drvdata(psy); power_supply_changed(info->bat); } static const struct power_supply_desc fuel_gauge_desc = { .name = DEV_NAME, .type = POWER_SUPPLY_TYPE_BATTERY, .properties = fuel_gauge_props, .num_properties = ARRAY_SIZE(fuel_gauge_props), .get_property = fuel_gauge_get_property, .set_property = fuel_gauge_set_property, .property_is_writeable = fuel_gauge_property_is_writeable, .external_power_changed = fuel_gauge_external_power_changed, }; static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info) { int ret; u8 reg_val; ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); if (ret < 0) { dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); return ret; } ret = (ret & FG_REP_CAP_VAL_MASK); if (ret > FG_LOW_CAP_WARN_THR) reg_val = FG_LOW_CAP_WARN_THR; else if (ret > FG_LOW_CAP_CRIT_THR) reg_val = FG_LOW_CAP_CRIT_THR; else reg_val = FG_LOW_CAP_SHDN_THR; reg_val |= FG_LOW_CAP_THR1_VAL; ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val); if (ret < 0) dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret); return ret; } static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info) { int ret; u8 val; ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); if (ret < 0) goto fg_prog_ocv_fail; else val = (ret & ~CHRG_CCCV_CV_MASK); switch (info->pdata->max_volt) { case CV_4100: val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS); break; case CV_4150: val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS); break; case CV_4200: val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); break; case CV_4350: val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS); break; default: val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); break; } ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val); fg_prog_ocv_fail: return ret; } static int fuel_gauge_program_design_cap(struct axp288_fg_info *info) { int ret; ret = fuel_gauge_reg_writeb(info, AXP288_FG_DES_CAP1_REG, info->pdata->cap1); if (ret < 0) goto fg_prog_descap_fail; ret = fuel_gauge_reg_writeb(info, AXP288_FG_DES_CAP0_REG, info->pdata->cap0); fg_prog_descap_fail: return ret; } static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info) { int ret = 0, i; for (i = 0; i < OCV_CURVE_SIZE; i++) { ret = fuel_gauge_reg_writeb(info, AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]); if (ret < 0) goto fg_prog_ocv_fail; } fg_prog_ocv_fail: return ret; } static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info) { int ret; ret = fuel_gauge_reg_writeb(info, AXP288_FG_RDC1_REG, info->pdata->rdc1); if (ret < 0) goto fg_prog_ocv_fail; ret = fuel_gauge_reg_writeb(info, AXP288_FG_RDC0_REG, info->pdata->rdc0); fg_prog_ocv_fail: return ret; } static void fuel_gauge_init_config_regs(struct axp288_fg_info *info) { int ret; /* * check if the config data is already * programmed and if so just return. */ ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); if (ret < 0) { dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n"); } else if (!(ret & FG_DES_CAP1_VALID)) { dev_info(&info->pdev->dev, "FG data needs to be initialized\n"); } else { dev_info(&info->pdev->dev, "FG data is already initialized\n"); return; } ret = fuel_gauge_program_vbatt_full(info); if (ret < 0) dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret); ret = fuel_gauge_program_design_cap(info); if (ret < 0) dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret); ret = fuel_gauge_program_rdc_vals(info); if (ret < 0) dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret); ret = fuel_gauge_program_ocv_curve(info); if (ret < 0) dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret); ret = fuel_gauge_set_lowbatt_thresholds(info); if (ret < 0) dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret); ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef); if (ret < 0) dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret); } static void fuel_gauge_init_irq(struct axp288_fg_info *info) { int ret, i, pirq; for (i = 0; i < AXP288_FG_INTR_NUM; i++) { pirq = platform_get_irq(info->pdev, i); info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); if (info->irq[i] < 0) { dev_warn(&info->pdev->dev, "regmap_irq get virq failed for IRQ %d: %d\n", pirq, info->irq[i]); info->irq[i] = -1; goto intr_failed; } ret = request_threaded_irq(info->irq[i], NULL, fuel_gauge_thread_handler, IRQF_ONESHOT, DEV_NAME, info); if (ret) { dev_warn(&info->pdev->dev, "request irq failed for IRQ %d: %d\n", pirq, info->irq[i]); info->irq[i] = -1; goto intr_failed; } else { dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n", pirq, info->irq[i]); } } return; intr_failed: for (; i > 0; i--) { free_irq(info->irq[i - 1], info); info->irq[i - 1] = -1; } } static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info) { int ret; unsigned int val; ret = fuel_gauge_set_high_btemp_alert(info); if (ret < 0) dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret); ret = fuel_gauge_set_low_btemp_alert(info); if (ret < 0) dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret); /* enable interrupts */ val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN); val |= TEMP_IRQ_CFG_MASK; fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val); val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN); val |= FG_IRQ_CFG_LOWBATT_MASK; val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val); } static int axp288_fuel_gauge_probe(struct platform_device *pdev) { int ret = 0; struct axp288_fg_info *info; struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); struct power_supply_config psy_cfg = {}; info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->pdev = pdev; info->regmap = axp20x->regmap; info->regmap_irqc = axp20x->regmap_irqc; info->status = POWER_SUPPLY_STATUS_UNKNOWN; info->pdata = pdev->dev.platform_data; if (!info->pdata) return -ENODEV; platform_set_drvdata(pdev, info); mutex_init(&info->lock); INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor); psy_cfg.drv_data = info; info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg); if (IS_ERR(info->bat)) { ret = PTR_ERR(info->bat); dev_err(&pdev->dev, "failed to register battery: %d\n", ret); return ret; } fuel_gauge_create_debugfs(info); fuel_gauge_init_config_regs(info); fuel_gauge_init_irq(info); fuel_gauge_init_hw_regs(info); schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); return ret; } static const struct platform_device_id axp288_fg_id_table[] = { { .name = DEV_NAME }, {}, }; static int axp288_fuel_gauge_remove(struct platform_device *pdev) { struct axp288_fg_info *info = platform_get_drvdata(pdev); int i; cancel_delayed_work_sync(&info->status_monitor); power_supply_unregister(info->bat); fuel_gauge_remove_debugfs(info); for (i = 0; i < AXP288_FG_INTR_NUM; i++) if (info->irq[i] >= 0) free_irq(info->irq[i], info); return 0; } static struct platform_driver axp288_fuel_gauge_driver = { .probe = axp288_fuel_gauge_probe, .remove = axp288_fuel_gauge_remove, .id_table = axp288_fg_id_table, .driver = { .name = DEV_NAME, }, }; module_platform_driver(axp288_fuel_gauge_driver); MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>"); MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver"); MODULE_LICENSE("GPL"); |