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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 | /* * wm831x-dcdc.c -- DC-DC buck convertor driver for the WM831x series * * Copyright 2009 Wolfson Microelectronics PLC. * * Author: Mark Brown <broonie@opensource.wolfsonmicro.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. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/bitops.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/mfd/wm831x/core.h> #include <linux/mfd/wm831x/regulator.h> #include <linux/mfd/wm831x/pdata.h> #define WM831X_BUCKV_MAX_SELECTOR 0x68 #define WM831X_BUCKP_MAX_SELECTOR 0x66 #define WM831X_DCDC_MODE_FAST 0 #define WM831X_DCDC_MODE_NORMAL 1 #define WM831X_DCDC_MODE_IDLE 2 #define WM831X_DCDC_MODE_STANDBY 3 #define WM831X_DCDC_MAX_NAME 6 /* Register offsets in control block */ #define WM831X_DCDC_CONTROL_1 0 #define WM831X_DCDC_CONTROL_2 1 #define WM831X_DCDC_ON_CONFIG 2 #define WM831X_DCDC_SLEEP_CONTROL 3 /* * Shared */ struct wm831x_dcdc { char name[WM831X_DCDC_MAX_NAME]; struct regulator_desc desc; int base; struct wm831x *wm831x; struct regulator_dev *regulator; }; static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; int mask = 1 << rdev_get_id(rdev); int reg; reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); if (reg < 0) return reg; if (reg & mask) return 1; else return 0; } static int wm831x_dcdc_enable(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; int mask = 1 << rdev_get_id(rdev); return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); } static int wm831x_dcdc_disable(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; int mask = 1 << rdev_get_id(rdev); return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); } static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; int val; val = wm831x_reg_read(wm831x, reg); if (val < 0) return val; val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; switch (val) { case WM831X_DCDC_MODE_FAST: return REGULATOR_MODE_FAST; case WM831X_DCDC_MODE_NORMAL: return REGULATOR_MODE_NORMAL; case WM831X_DCDC_MODE_STANDBY: return REGULATOR_MODE_STANDBY; case WM831X_DCDC_MODE_IDLE: return REGULATOR_MODE_IDLE; default: BUG(); } } static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, unsigned int mode) { int val; switch (mode) { case REGULATOR_MODE_FAST: val = WM831X_DCDC_MODE_FAST; break; case REGULATOR_MODE_NORMAL: val = WM831X_DCDC_MODE_NORMAL; break; case REGULATOR_MODE_STANDBY: val = WM831X_DCDC_MODE_STANDBY; break; case REGULATOR_MODE_IDLE: val = WM831X_DCDC_MODE_IDLE; break; default: return -EINVAL; } return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, val << WM831X_DC1_ON_MODE_SHIFT); } static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; return wm831x_dcdc_set_mode_int(wm831x, reg, mode); } static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; return wm831x_dcdc_set_mode_int(wm831x, reg, mode); } static int wm831x_dcdc_get_status(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; int ret; /* First, check for errors */ ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); if (ret < 0) return ret; if (ret & (1 << rdev_get_id(rdev))) { dev_dbg(wm831x->dev, "DCDC%d under voltage\n", rdev_get_id(rdev) + 1); return REGULATOR_STATUS_ERROR; } /* DCDC1 and DCDC2 can additionally detect high voltage/current */ if (rdev_get_id(rdev) < 2) { if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { dev_dbg(wm831x->dev, "DCDC%d over voltage\n", rdev_get_id(rdev) + 1); return REGULATOR_STATUS_ERROR; } if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { dev_dbg(wm831x->dev, "DCDC%d over current\n", rdev_get_id(rdev) + 1); return REGULATOR_STATUS_ERROR; } } /* Is the regulator on? */ ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); if (ret < 0) return ret; if (!(ret & (1 << rdev_get_id(rdev)))) return REGULATOR_STATUS_OFF; /* TODO: When we handle hardware control modes so we can report the * current mode. */ return REGULATOR_STATUS_ON; } static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) { struct wm831x_dcdc *dcdc = data; regulator_notifier_call_chain(dcdc->regulator, REGULATOR_EVENT_UNDER_VOLTAGE, NULL); return IRQ_HANDLED; } static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) { struct wm831x_dcdc *dcdc = data; regulator_notifier_call_chain(dcdc->regulator, REGULATOR_EVENT_OVER_CURRENT, NULL); return IRQ_HANDLED; } /* * BUCKV specifics */ static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, unsigned selector) { if (selector <= 0x8) return 600000; if (selector <= WM831X_BUCKV_MAX_SELECTOR) return 600000 + ((selector - 0x8) * 12500); return -EINVAL; } static int wm831x_buckv_set_voltage_int(struct regulator_dev *rdev, int reg, int min_uV, int max_uV) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 vsel; if (min_uV < 600000) vsel = 0; else if (min_uV <= 1800000) vsel = ((min_uV - 600000) / 12500) + 8; else return -EINVAL; if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) return -EINVAL; return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_VSEL_MASK, vsel); } static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; return wm831x_buckv_set_voltage_int(rdev, reg, min_uV, max_uV); } static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, int uV) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; return wm831x_buckv_set_voltage_int(rdev, reg, uV, uV); } static int wm831x_buckv_get_voltage(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; int val; val = wm831x_reg_read(wm831x, reg); if (val < 0) return val; return wm831x_buckv_list_voltage(rdev, val & WM831X_DC1_ON_VSEL_MASK); } /* Current limit options */ static u16 wm831x_dcdc_ilim[] = { 125, 250, 375, 500, 625, 750, 875, 1000 }; static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; int i; for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { if (max_uA <= wm831x_dcdc_ilim[i]) break; } if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) return -EINVAL; return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i); } static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; int val; val = wm831x_reg_read(wm831x, reg); if (val < 0) return val; return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK]; } static struct regulator_ops wm831x_buckv_ops = { .set_voltage = wm831x_buckv_set_voltage, .get_voltage = wm831x_buckv_get_voltage, .list_voltage = wm831x_buckv_list_voltage, .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, .set_current_limit = wm831x_buckv_set_current_limit, .get_current_limit = wm831x_buckv_get_current_limit, .is_enabled = wm831x_dcdc_is_enabled, .enable = wm831x_dcdc_enable, .disable = wm831x_dcdc_disable, .get_status = wm831x_dcdc_get_status, .get_mode = wm831x_dcdc_get_mode, .set_mode = wm831x_dcdc_set_mode, .set_suspend_mode = wm831x_dcdc_set_suspend_mode, }; static __devinit int wm831x_buckv_probe(struct platform_device *pdev) { struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); struct wm831x_pdata *pdata = wm831x->dev->platform_data; int id = pdev->id % ARRAY_SIZE(pdata->dcdc); struct wm831x_dcdc *dcdc; struct resource *res; int ret, irq; dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); if (pdata == NULL || pdata->dcdc[id] == NULL) return -ENODEV; dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); if (dcdc == NULL) { dev_err(&pdev->dev, "Unable to allocate private data\n"); return -ENOMEM; } dcdc->wm831x = wm831x; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (res == NULL) { dev_err(&pdev->dev, "No I/O resource\n"); ret = -EINVAL; goto err; } dcdc->base = res->start; snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); dcdc->desc.name = dcdc->name; dcdc->desc.id = id; dcdc->desc.type = REGULATOR_VOLTAGE; dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; dcdc->desc.ops = &wm831x_buckv_ops; dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, pdata->dcdc[id], dcdc); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", id + 1, ret); goto err; } irq = platform_get_irq_byname(pdev, "UV"); ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, IRQF_TRIGGER_RISING, dcdc->name, dcdc); if (ret != 0) { dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", irq, ret); goto err_regulator; } irq = platform_get_irq_byname(pdev, "HC"); ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_oc_irq, IRQF_TRIGGER_RISING, dcdc->name, dcdc); if (ret != 0) { dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", irq, ret); goto err_uv; } platform_set_drvdata(pdev, dcdc); return 0; err_uv: wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); err_regulator: regulator_unregister(dcdc->regulator); err: kfree(dcdc); return ret; } static __devexit int wm831x_buckv_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); struct wm831x *wm831x = dcdc->wm831x; wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "HC"), dcdc); wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); regulator_unregister(dcdc->regulator); kfree(dcdc); return 0; } static struct platform_driver wm831x_buckv_driver = { .probe = wm831x_buckv_probe, .remove = __devexit_p(wm831x_buckv_remove), .driver = { .name = "wm831x-buckv", }, }; /* * BUCKP specifics */ static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, unsigned selector) { if (selector <= WM831X_BUCKP_MAX_SELECTOR) return 850000 + (selector * 25000); else return -EINVAL; } static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, int min_uV, int max_uV) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 vsel; if (min_uV <= 34000000) vsel = (min_uV - 850000) / 25000; else return -EINVAL; if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) return -EINVAL; return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); } static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV); } static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, int uV) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV); } static int wm831x_buckp_get_voltage(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; int val; val = wm831x_reg_read(wm831x, reg); if (val < 0) return val; return wm831x_buckp_list_voltage(rdev, val & WM831X_DC3_ON_VSEL_MASK); } static struct regulator_ops wm831x_buckp_ops = { .set_voltage = wm831x_buckp_set_voltage, .get_voltage = wm831x_buckp_get_voltage, .list_voltage = wm831x_buckp_list_voltage, .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, .is_enabled = wm831x_dcdc_is_enabled, .enable = wm831x_dcdc_enable, .disable = wm831x_dcdc_disable, .get_status = wm831x_dcdc_get_status, .get_mode = wm831x_dcdc_get_mode, .set_mode = wm831x_dcdc_set_mode, .set_suspend_mode = wm831x_dcdc_set_suspend_mode, }; static __devinit int wm831x_buckp_probe(struct platform_device *pdev) { struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); struct wm831x_pdata *pdata = wm831x->dev->platform_data; int id = pdev->id % ARRAY_SIZE(pdata->dcdc); struct wm831x_dcdc *dcdc; struct resource *res; int ret, irq; dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); if (pdata == NULL || pdata->dcdc[id] == NULL) return -ENODEV; dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); if (dcdc == NULL) { dev_err(&pdev->dev, "Unable to allocate private data\n"); return -ENOMEM; } dcdc->wm831x = wm831x; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (res == NULL) { dev_err(&pdev->dev, "No I/O resource\n"); ret = -EINVAL; goto err; } dcdc->base = res->start; snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); dcdc->desc.name = dcdc->name; dcdc->desc.id = id; dcdc->desc.type = REGULATOR_VOLTAGE; dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; dcdc->desc.ops = &wm831x_buckp_ops; dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, pdata->dcdc[id], dcdc); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", id + 1, ret); goto err; } irq = platform_get_irq_byname(pdev, "UV"); ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, IRQF_TRIGGER_RISING, dcdc->name, dcdc); if (ret != 0) { dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", irq, ret); goto err_regulator; } platform_set_drvdata(pdev, dcdc); return 0; err_regulator: regulator_unregister(dcdc->regulator); err: kfree(dcdc); return ret; } static __devexit int wm831x_buckp_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); struct wm831x *wm831x = dcdc->wm831x; wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); regulator_unregister(dcdc->regulator); kfree(dcdc); return 0; } static struct platform_driver wm831x_buckp_driver = { .probe = wm831x_buckp_probe, .remove = __devexit_p(wm831x_buckp_remove), .driver = { .name = "wm831x-buckp", }, }; /* * DCDC boost convertors */ static int wm831x_boostp_get_status(struct regulator_dev *rdev) { struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); struct wm831x *wm831x = dcdc->wm831x; int ret; /* First, check for errors */ ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); if (ret < 0) return ret; if (ret & (1 << rdev_get_id(rdev))) { dev_dbg(wm831x->dev, "DCDC%d under voltage\n", rdev_get_id(rdev) + 1); return REGULATOR_STATUS_ERROR; } /* Is the regulator on? */ ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); if (ret < 0) return ret; if (ret & (1 << rdev_get_id(rdev))) return REGULATOR_STATUS_ON; else return REGULATOR_STATUS_OFF; } static struct regulator_ops wm831x_boostp_ops = { .get_status = wm831x_boostp_get_status, .is_enabled = wm831x_dcdc_is_enabled, .enable = wm831x_dcdc_enable, .disable = wm831x_dcdc_disable, }; static __devinit int wm831x_boostp_probe(struct platform_device *pdev) { struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); struct wm831x_pdata *pdata = wm831x->dev->platform_data; int id = pdev->id % ARRAY_SIZE(pdata->dcdc); struct wm831x_dcdc *dcdc; struct resource *res; int ret, irq; dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); if (pdata == NULL || pdata->dcdc[id] == NULL) return -ENODEV; dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); if (dcdc == NULL) { dev_err(&pdev->dev, "Unable to allocate private data\n"); return -ENOMEM; } dcdc->wm831x = wm831x; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (res == NULL) { dev_err(&pdev->dev, "No I/O resource\n"); ret = -EINVAL; goto err; } dcdc->base = res->start; snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); dcdc->desc.name = dcdc->name; dcdc->desc.id = id; dcdc->desc.type = REGULATOR_VOLTAGE; dcdc->desc.ops = &wm831x_boostp_ops; dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, pdata->dcdc[id], dcdc); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", id + 1, ret); goto err; } irq = platform_get_irq_byname(pdev, "UV"); ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, IRQF_TRIGGER_RISING, dcdc->name, dcdc); if (ret != 0) { dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", irq, ret); goto err_regulator; } platform_set_drvdata(pdev, dcdc); return 0; err_regulator: regulator_unregister(dcdc->regulator); err: kfree(dcdc); return ret; } static __devexit int wm831x_boostp_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); struct wm831x *wm831x = dcdc->wm831x; wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); regulator_unregister(dcdc->regulator); kfree(dcdc); return 0; } static struct platform_driver wm831x_boostp_driver = { .probe = wm831x_boostp_probe, .remove = __devexit_p(wm831x_boostp_remove), .driver = { .name = "wm831x-boostp", }, }; /* * External Power Enable * * These aren't actually DCDCs but look like them in hardware so share * code. */ #define WM831X_EPE_BASE 6 static struct regulator_ops wm831x_epe_ops = { .is_enabled = wm831x_dcdc_is_enabled, .enable = wm831x_dcdc_enable, .disable = wm831x_dcdc_disable, .get_status = wm831x_dcdc_get_status, }; static __devinit int wm831x_epe_probe(struct platform_device *pdev) { struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); struct wm831x_pdata *pdata = wm831x->dev->platform_data; int id = pdev->id % ARRAY_SIZE(pdata->epe); struct wm831x_dcdc *dcdc; int ret; dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); if (pdata == NULL || pdata->epe[id] == NULL) return -ENODEV; dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); if (dcdc == NULL) { dev_err(&pdev->dev, "Unable to allocate private data\n"); return -ENOMEM; } dcdc->wm831x = wm831x; /* For current parts this is correct; probably need to revisit * in future. */ snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); dcdc->desc.name = dcdc->name; dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ dcdc->desc.ops = &wm831x_epe_ops; dcdc->desc.type = REGULATOR_VOLTAGE; dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, pdata->epe[id], dcdc); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", id + 1, ret); goto err; } platform_set_drvdata(pdev, dcdc); return 0; err: kfree(dcdc); return ret; } static __devexit int wm831x_epe_remove(struct platform_device *pdev) { struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); regulator_unregister(dcdc->regulator); kfree(dcdc); return 0; } static struct platform_driver wm831x_epe_driver = { .probe = wm831x_epe_probe, .remove = __devexit_p(wm831x_epe_remove), .driver = { .name = "wm831x-epe", }, }; static int __init wm831x_dcdc_init(void) { int ret; ret = platform_driver_register(&wm831x_buckv_driver); if (ret != 0) pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); ret = platform_driver_register(&wm831x_buckp_driver); if (ret != 0) pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); ret = platform_driver_register(&wm831x_boostp_driver); if (ret != 0) pr_err("Failed to register WM831x BOOST driver: %d\n", ret); ret = platform_driver_register(&wm831x_epe_driver); if (ret != 0) pr_err("Failed to register WM831x EPE driver: %d\n", ret); return 0; } subsys_initcall(wm831x_dcdc_init); static void __exit wm831x_dcdc_exit(void) { platform_driver_unregister(&wm831x_epe_driver); platform_driver_unregister(&wm831x_boostp_driver); platform_driver_unregister(&wm831x_buckp_driver); platform_driver_unregister(&wm831x_buckv_driver); } module_exit(wm831x_dcdc_exit); /* Module information */ MODULE_AUTHOR("Mark Brown"); MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:wm831x-buckv"); MODULE_ALIAS("platform:wm831x-buckp"); |