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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 | /* * max8998.c - Voltage regulator driver for the Maxim 8998 * * Copyright (C) 2009-2010 Samsung Electronics * Kyungmin Park <kyungmin.park@samsung.com> * Marek Szyprowski <m.szyprowski@samsung.com> * * 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; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/module.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/of_regulator.h> #include <linux/mfd/max8998.h> #include <linux/mfd/max8998-private.h> struct max8998_data { struct device *dev; struct max8998_dev *iodev; int num_regulators; u8 buck1_vol[4]; /* voltages for selection */ u8 buck2_vol[2]; unsigned int buck1_idx; /* index to last changed voltage */ /* value in a set */ unsigned int buck2_idx; }; struct voltage_map_desc { int min; int max; int step; }; /* Voltage maps in uV*/ static const struct voltage_map_desc ldo23_voltage_map_desc = { .min = 800000, .step = 50000, .max = 1300000, }; static const struct voltage_map_desc ldo456711_voltage_map_desc = { .min = 1600000, .step = 100000, .max = 3600000, }; static const struct voltage_map_desc ldo8_voltage_map_desc = { .min = 3000000, .step = 100000, .max = 3600000, }; static const struct voltage_map_desc ldo9_voltage_map_desc = { .min = 2800000, .step = 100000, .max = 3100000, }; static const struct voltage_map_desc ldo10_voltage_map_desc = { .min = 950000, .step = 50000, .max = 1300000, }; static const struct voltage_map_desc ldo1213_voltage_map_desc = { .min = 800000, .step = 100000, .max = 3300000, }; static const struct voltage_map_desc ldo1415_voltage_map_desc = { .min = 1200000, .step = 100000, .max = 3300000, }; static const struct voltage_map_desc ldo1617_voltage_map_desc = { .min = 1600000, .step = 100000, .max = 3600000, }; static const struct voltage_map_desc buck12_voltage_map_desc = { .min = 750000, .step = 25000, .max = 1525000, }; static const struct voltage_map_desc buck3_voltage_map_desc = { .min = 1600000, .step = 100000, .max = 3600000, }; static const struct voltage_map_desc buck4_voltage_map_desc = { .min = 800000, .step = 100000, .max = 2300000, }; static const struct voltage_map_desc *ldo_voltage_map[] = { NULL, NULL, &ldo23_voltage_map_desc, /* LDO2 */ &ldo23_voltage_map_desc, /* LDO3 */ &ldo456711_voltage_map_desc, /* LDO4 */ &ldo456711_voltage_map_desc, /* LDO5 */ &ldo456711_voltage_map_desc, /* LDO6 */ &ldo456711_voltage_map_desc, /* LDO7 */ &ldo8_voltage_map_desc, /* LDO8 */ &ldo9_voltage_map_desc, /* LDO9 */ &ldo10_voltage_map_desc, /* LDO10 */ &ldo456711_voltage_map_desc, /* LDO11 */ &ldo1213_voltage_map_desc, /* LDO12 */ &ldo1213_voltage_map_desc, /* LDO13 */ &ldo1415_voltage_map_desc, /* LDO14 */ &ldo1415_voltage_map_desc, /* LDO15 */ &ldo1617_voltage_map_desc, /* LDO16 */ &ldo1617_voltage_map_desc, /* LDO17 */ &buck12_voltage_map_desc, /* BUCK1 */ &buck12_voltage_map_desc, /* BUCK2 */ &buck3_voltage_map_desc, /* BUCK3 */ &buck4_voltage_map_desc, /* BUCK4 */ }; static int max8998_get_enable_register(struct regulator_dev *rdev, int *reg, int *shift) { int ldo = rdev_get_id(rdev); switch (ldo) { case MAX8998_LDO2 ... MAX8998_LDO5: *reg = MAX8998_REG_ONOFF1; *shift = 3 - (ldo - MAX8998_LDO2); break; case MAX8998_LDO6 ... MAX8998_LDO13: *reg = MAX8998_REG_ONOFF2; *shift = 7 - (ldo - MAX8998_LDO6); break; case MAX8998_LDO14 ... MAX8998_LDO17: *reg = MAX8998_REG_ONOFF3; *shift = 7 - (ldo - MAX8998_LDO14); break; case MAX8998_BUCK1 ... MAX8998_BUCK4: *reg = MAX8998_REG_ONOFF1; *shift = 7 - (ldo - MAX8998_BUCK1); break; case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: *reg = MAX8998_REG_ONOFF4; *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); break; case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: *reg = MAX8998_REG_CHGR2; *shift = 7 - (ldo - MAX8998_ESAFEOUT1); break; default: return -EINVAL; } return 0; } static int max8998_ldo_is_enabled(struct regulator_dev *rdev) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8998->iodev->i2c; int ret, reg, shift = 8; u8 val; ret = max8998_get_enable_register(rdev, ®, &shift); if (ret) return ret; ret = max8998_read_reg(i2c, reg, &val); if (ret) return ret; return val & (1 << shift); } static int max8998_ldo_enable(struct regulator_dev *rdev) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8998->iodev->i2c; int reg, shift = 8, ret; ret = max8998_get_enable_register(rdev, ®, &shift); if (ret) return ret; return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); } static int max8998_ldo_disable(struct regulator_dev *rdev) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8998->iodev->i2c; int reg, shift = 8, ret; ret = max8998_get_enable_register(rdev, ®, &shift); if (ret) return ret; return max8998_update_reg(i2c, reg, 0, 1<<shift); } static int max8998_get_voltage_register(struct regulator_dev *rdev, int *_reg, int *_shift, int *_mask) { int ldo = rdev_get_id(rdev); struct max8998_data *max8998 = rdev_get_drvdata(rdev); int reg, shift = 0, mask = 0xff; switch (ldo) { case MAX8998_LDO2 ... MAX8998_LDO3: reg = MAX8998_REG_LDO2_LDO3; mask = 0xf; if (ldo == MAX8998_LDO2) shift = 4; else shift = 0; break; case MAX8998_LDO4 ... MAX8998_LDO7: reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); break; case MAX8998_LDO8 ... MAX8998_LDO9: reg = MAX8998_REG_LDO8_LDO9; mask = 0xf; if (ldo == MAX8998_LDO8) shift = 4; else shift = 0; break; case MAX8998_LDO10 ... MAX8998_LDO11: reg = MAX8998_REG_LDO10_LDO11; if (ldo == MAX8998_LDO10) { shift = 5; mask = 0x7; } else { shift = 0; mask = 0x1f; } break; case MAX8998_LDO12 ... MAX8998_LDO17: reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); break; case MAX8998_BUCK1: reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; break; case MAX8998_BUCK2: reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; break; case MAX8998_BUCK3: reg = MAX8998_REG_BUCK3; break; case MAX8998_BUCK4: reg = MAX8998_REG_BUCK4; break; default: return -EINVAL; } *_reg = reg; *_shift = shift; *_mask = mask; return 0; } static int max8998_get_voltage_sel(struct regulator_dev *rdev) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8998->iodev->i2c; int reg, shift = 0, mask, ret; u8 val; ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; ret = max8998_read_reg(i2c, reg, &val); if (ret) return ret; val >>= shift; val &= mask; return val; } static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, unsigned selector) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8998->iodev->i2c; int reg, shift = 0, mask, ret; ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); return ret; } static inline void buck1_gpio_set(int gpio1, int gpio2, int v) { gpio_set_value(gpio1, v & 0x1); gpio_set_value(gpio2, (v >> 1) & 0x1); } static inline void buck2_gpio_set(int gpio, int v) { gpio_set_value(gpio, v & 0x1); } static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, unsigned selector) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct max8998_platform_data *pdata = dev_get_platdata(max8998->iodev->dev); struct i2c_client *i2c = max8998->iodev->i2c; int buck = rdev_get_id(rdev); int reg, shift = 0, mask, ret, j; static u8 buck1_last_val; ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; switch (buck) { case MAX8998_BUCK1: dev_dbg(max8998->dev, "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" "buck1_vol3:%d, buck1_vol4:%d\n", selector, max8998->buck1_vol[0], max8998->buck1_vol[1], max8998->buck1_vol[2], max8998->buck1_vol[3]); if (gpio_is_valid(pdata->buck1_set1) && gpio_is_valid(pdata->buck1_set2)) { /* check if requested voltage */ /* value is already defined */ for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { if (max8998->buck1_vol[j] == selector) { max8998->buck1_idx = j; buck1_gpio_set(pdata->buck1_set1, pdata->buck1_set2, j); goto buck1_exit; } } if (pdata->buck_voltage_lock) return -EINVAL; /* no predefine regulator found */ max8998->buck1_idx = (buck1_last_val % 2) + 2; dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", max8998->buck1_idx); max8998->buck1_vol[max8998->buck1_idx] = selector; ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); ret = max8998_write_reg(i2c, reg, selector); buck1_gpio_set(pdata->buck1_set1, pdata->buck1_set2, max8998->buck1_idx); buck1_last_val++; buck1_exit: dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", i2c->name, gpio_get_value(pdata->buck1_set1), gpio_get_value(pdata->buck1_set2)); break; } else { ret = max8998_write_reg(i2c, reg, selector); } break; case MAX8998_BUCK2: dev_dbg(max8998->dev, "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); if (gpio_is_valid(pdata->buck2_set3)) { /* check if requested voltage */ /* value is already defined */ for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { if (max8998->buck2_vol[j] == selector) { max8998->buck2_idx = j; buck2_gpio_set(pdata->buck2_set3, j); goto buck2_exit; } } if (pdata->buck_voltage_lock) return -EINVAL; max8998_get_voltage_register(rdev, ®, &shift, &mask); ret = max8998_write_reg(i2c, reg, selector); max8998->buck2_vol[max8998->buck2_idx] = selector; buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); buck2_exit: dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, gpio_get_value(pdata->buck2_set3)); } else { ret = max8998_write_reg(i2c, reg, selector); } break; case MAX8998_BUCK3: case MAX8998_BUCK4: ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); break; } return ret; } static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, unsigned int old_selector, unsigned int new_selector) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8998->iodev->i2c; const struct voltage_map_desc *desc; int buck = rdev_get_id(rdev); u8 val = 0; int difference, ret; if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) return -EINVAL; desc = ldo_voltage_map[buck]; /* Voltage stabilization */ ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); if (ret) return ret; /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ /* MAX8998 has ENRAMP bit implemented, so test it*/ if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) return 0; difference = (new_selector - old_selector) * desc->step / 1000; if (difference > 0) return DIV_ROUND_UP(difference, (val & 0x0f) + 1); return 0; } static struct regulator_ops max8998_ldo_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = max8998_ldo_is_enabled, .enable = max8998_ldo_enable, .disable = max8998_ldo_disable, .get_voltage_sel = max8998_get_voltage_sel, .set_voltage_sel = max8998_set_voltage_ldo_sel, }; static struct regulator_ops max8998_buck_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = max8998_ldo_is_enabled, .enable = max8998_ldo_enable, .disable = max8998_ldo_disable, .get_voltage_sel = max8998_get_voltage_sel, .set_voltage_sel = max8998_set_voltage_buck_sel, .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, }; static struct regulator_ops max8998_others_ops = { .is_enabled = max8998_ldo_is_enabled, .enable = max8998_ldo_enable, .disable = max8998_ldo_disable, }; static struct regulator_desc regulators[] = { { .name = "LDO2", .id = MAX8998_LDO2, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO3", .id = MAX8998_LDO3, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO4", .id = MAX8998_LDO4, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO5", .id = MAX8998_LDO5, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO6", .id = MAX8998_LDO6, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO7", .id = MAX8998_LDO7, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO8", .id = MAX8998_LDO8, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO9", .id = MAX8998_LDO9, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO10", .id = MAX8998_LDO10, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO11", .id = MAX8998_LDO11, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO12", .id = MAX8998_LDO12, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO13", .id = MAX8998_LDO13, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO14", .id = MAX8998_LDO14, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO15", .id = MAX8998_LDO15, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO16", .id = MAX8998_LDO16, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO17", .id = MAX8998_LDO17, .ops = &max8998_ldo_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "BUCK1", .id = MAX8998_BUCK1, .ops = &max8998_buck_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "BUCK2", .id = MAX8998_BUCK2, .ops = &max8998_buck_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "BUCK3", .id = MAX8998_BUCK3, .ops = &max8998_buck_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "BUCK4", .id = MAX8998_BUCK4, .ops = &max8998_buck_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "EN32KHz-AP", .id = MAX8998_EN32KHZ_AP, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "EN32KHz-CP", .id = MAX8998_EN32KHZ_CP, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "ENVICHG", .id = MAX8998_ENVICHG, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "ESAFEOUT1", .id = MAX8998_ESAFEOUT1, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "ESAFEOUT2", .id = MAX8998_ESAFEOUT2, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, } }; static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, struct max8998_platform_data *pdata, struct device_node *pmic_np) { int gpio; gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); if (!gpio_is_valid(gpio)) { dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); return -EINVAL; } pdata->buck1_set1 = gpio; gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); if (!gpio_is_valid(gpio)) { dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); return -EINVAL; } pdata->buck1_set2 = gpio; gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); if (!gpio_is_valid(gpio)) { dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); return -EINVAL; } pdata->buck2_set3 = gpio; return 0; } static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, struct max8998_platform_data *pdata) { struct device_node *pmic_np = iodev->dev->of_node; struct device_node *regulators_np, *reg_np; struct max8998_regulator_data *rdata; unsigned int i; int ret; regulators_np = of_get_child_by_name(pmic_np, "regulators"); if (!regulators_np) { dev_err(iodev->dev, "could not find regulators sub-node\n"); return -EINVAL; } /* count the number of regulators to be supported in pmic */ pdata->num_regulators = of_get_child_count(regulators_np); rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * pdata->num_regulators, GFP_KERNEL); if (!rdata) { of_node_put(regulators_np); return -ENOMEM; } pdata->regulators = rdata; for (i = 0; i < ARRAY_SIZE(regulators); ++i) { reg_np = of_get_child_by_name(regulators_np, regulators[i].name); if (!reg_np) continue; rdata->id = regulators[i].id; rdata->initdata = of_get_regulator_init_data( iodev->dev, reg_np); rdata->reg_node = reg_np; ++rdata; } pdata->num_regulators = rdata - pdata->regulators; of_node_put(reg_np); of_node_put(regulators_np); ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); if (ret) return -EINVAL; if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) pdata->buck_voltage_lock = true; ret = of_property_read_u32(pmic_np, "max8998,pmic-buck1-default-dvs-idx", &pdata->buck1_default_idx); if (!ret && pdata->buck1_default_idx >= 4) { pdata->buck1_default_idx = 0; dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); } ret = of_property_read_u32(pmic_np, "max8998,pmic-buck2-default-dvs-idx", &pdata->buck2_default_idx); if (!ret && pdata->buck2_default_idx >= 2) { pdata->buck2_default_idx = 0; dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); } ret = of_property_read_u32_array(pmic_np, "max8998,pmic-buck1-dvs-voltage", pdata->buck1_voltage, ARRAY_SIZE(pdata->buck1_voltage)); if (ret) { dev_err(iodev->dev, "buck1 voltages not specified\n"); return -EINVAL; } ret = of_property_read_u32_array(pmic_np, "max8998,pmic-buck2-dvs-voltage", pdata->buck2_voltage, ARRAY_SIZE(pdata->buck2_voltage)); if (ret) { dev_err(iodev->dev, "buck2 voltages not specified\n"); return -EINVAL; } return 0; } static int max8998_pmic_probe(struct platform_device *pdev) { struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct max8998_platform_data *pdata = iodev->pdata; struct regulator_config config = { }; struct regulator_dev *rdev; struct max8998_data *max8998; struct i2c_client *i2c; int i, ret; unsigned int v; if (!pdata) { dev_err(pdev->dev.parent, "No platform init data supplied\n"); return -ENODEV; } if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { ret = max8998_pmic_dt_parse_pdata(iodev, pdata); if (ret) return ret; } max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), GFP_KERNEL); if (!max8998) return -ENOMEM; max8998->dev = &pdev->dev; max8998->iodev = iodev; max8998->num_regulators = pdata->num_regulators; platform_set_drvdata(pdev, max8998); i2c = max8998->iodev->i2c; max8998->buck1_idx = pdata->buck1_default_idx; max8998->buck2_idx = pdata->buck2_default_idx; /* NOTE: */ /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ /* will be displayed */ /* Check if MAX8998 voltage selection GPIOs are defined */ if (gpio_is_valid(pdata->buck1_set1) && gpio_is_valid(pdata->buck1_set2)) { /* Check if SET1 is not equal to 0 */ if (!pdata->buck1_set1) { dev_err(&pdev->dev, "MAX8998 SET1 GPIO defined as 0 !\n"); WARN_ON(!pdata->buck1_set1); return -EIO; } /* Check if SET2 is not equal to 0 */ if (!pdata->buck1_set2) { dev_err(&pdev->dev, "MAX8998 SET2 GPIO defined as 0 !\n"); WARN_ON(!pdata->buck1_set2); return -EIO; } gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); gpio_direction_output(pdata->buck1_set1, max8998->buck1_idx & 0x1); gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); gpio_direction_output(pdata->buck1_set2, (max8998->buck1_idx >> 1) & 0x1); /* Set predefined values for BUCK1 registers */ for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { i = 0; while (buck12_voltage_map_desc.min + buck12_voltage_map_desc.step*i < pdata->buck1_voltage[v]) i++; max8998->buck1_vol[v] = i; ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1 + v, i); if (ret) return ret; } } if (gpio_is_valid(pdata->buck2_set3)) { /* Check if SET3 is not equal to 0 */ if (!pdata->buck2_set3) { dev_err(&pdev->dev, "MAX8998 SET3 GPIO defined as 0 !\n"); WARN_ON(!pdata->buck2_set3); return -EIO; } gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); gpio_direction_output(pdata->buck2_set3, max8998->buck2_idx & 0x1); /* Set predefined values for BUCK2 registers */ for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { i = 0; while (buck12_voltage_map_desc.min + buck12_voltage_map_desc.step*i < pdata->buck2_voltage[v]) i++; max8998->buck2_vol[v] = i; ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1 + v, i); if (ret) return ret; } } for (i = 0; i < pdata->num_regulators; i++) { const struct voltage_map_desc *desc; int id = pdata->regulators[i].id; int index = id - MAX8998_LDO2; desc = ldo_voltage_map[id]; if (desc && regulators[index].ops != &max8998_others_ops) { int count = (desc->max - desc->min) / desc->step + 1; regulators[index].n_voltages = count; regulators[index].min_uV = desc->min; regulators[index].uV_step = desc->step; } config.dev = max8998->dev; config.of_node = pdata->regulators[i].reg_node; config.init_data = pdata->regulators[i].initdata; config.driver_data = max8998; rdev = devm_regulator_register(&pdev->dev, ®ulators[index], &config); if (IS_ERR(rdev)) { ret = PTR_ERR(rdev); dev_err(max8998->dev, "regulator %s init failed (%d)\n", regulators[index].name, ret); return ret; } } return 0; } static const struct platform_device_id max8998_pmic_id[] = { { "max8998-pmic", TYPE_MAX8998 }, { "lp3974-pmic", TYPE_LP3974 }, { } }; MODULE_DEVICE_TABLE(platform, max8998_pmic_id); static struct platform_driver max8998_pmic_driver = { .driver = { .name = "max8998-pmic", .owner = THIS_MODULE, }, .probe = max8998_pmic_probe, .id_table = max8998_pmic_id, }; static int __init max8998_pmic_init(void) { return platform_driver_register(&max8998_pmic_driver); } subsys_initcall(max8998_pmic_init); static void __exit max8998_pmic_cleanup(void) { platform_driver_unregister(&max8998_pmic_driver); } module_exit(max8998_pmic_cleanup); MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); MODULE_LICENSE("GPL"); |