1 /* 2 * wm831x-ldo.c -- LDO driver for the WM831x series 3 * 4 * Copyright 2009 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/bitops.h> 18 #include <linux/err.h> 19 #include <linux/i2c.h> 20 #include <linux/platform_device.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/slab.h> 23 24 #include <linux/mfd/wm831x/core.h> 25 #include <linux/mfd/wm831x/regulator.h> 26 #include <linux/mfd/wm831x/pdata.h> 27 28 #define WM831X_LDO_MAX_NAME 9 29 30 #define WM831X_LDO_CONTROL 0 31 #define WM831X_LDO_ON_CONTROL 1 32 #define WM831X_LDO_SLEEP_CONTROL 2 33 34 #define WM831X_ALIVE_LDO_ON_CONTROL 0 35 #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 36 37 struct wm831x_ldo { 38 char name[WM831X_LDO_MAX_NAME]; 39 char supply_name[WM831X_LDO_MAX_NAME]; 40 struct regulator_desc desc; 41 int base; 42 struct wm831x *wm831x; 43 struct regulator_dev *regulator; 44 }; 45 46 /* 47 * Shared 48 */ 49 50 static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) 51 { 52 struct wm831x_ldo *ldo = data; 53 54 regulator_notifier_call_chain(ldo->regulator, 55 REGULATOR_EVENT_UNDER_VOLTAGE, 56 NULL); 57 58 return IRQ_HANDLED; 59 } 60 61 /* 62 * General purpose LDOs 63 */ 64 65 #define WM831X_GP_LDO_SELECTOR_LOW 0xe 66 #define WM831X_GP_LDO_MAX_SELECTOR 0x1f 67 68 static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, 69 unsigned int selector) 70 { 71 /* 0.9-1.6V in 50mV steps */ 72 if (selector <= WM831X_GP_LDO_SELECTOR_LOW) 73 return 900000 + (selector * 50000); 74 /* 1.7-3.3V in 100mV steps */ 75 if (selector <= WM831X_GP_LDO_MAX_SELECTOR) 76 return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) 77 * 100000); 78 return -EINVAL; 79 } 80 81 static int wm831x_gp_ldo_map_voltage(struct regulator_dev *rdev, 82 int min_uV, int max_uV) 83 { 84 int volt, vsel; 85 86 if (min_uV < 900000) 87 vsel = 0; 88 else if (min_uV < 1700000) 89 vsel = ((min_uV - 900000) / 50000); 90 else 91 vsel = ((min_uV - 1700000) / 100000) 92 + WM831X_GP_LDO_SELECTOR_LOW + 1; 93 94 volt = wm831x_gp_ldo_list_voltage(rdev, vsel); 95 if (volt < min_uV || volt > max_uV) 96 return -EINVAL; 97 98 return vsel; 99 } 100 101 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, 102 int uV) 103 { 104 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 105 struct wm831x *wm831x = ldo->wm831x; 106 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; 107 108 sel = wm831x_gp_ldo_map_voltage(rdev, uV, uV); 109 if (sel < 0) 110 return sel; 111 112 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel); 113 } 114 115 static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) 116 { 117 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 118 struct wm831x *wm831x = ldo->wm831x; 119 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; 120 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; 121 int ret; 122 123 ret = wm831x_reg_read(wm831x, on_reg); 124 if (ret < 0) 125 return ret; 126 127 if (!(ret & WM831X_LDO1_ON_MODE)) 128 return REGULATOR_MODE_NORMAL; 129 130 ret = wm831x_reg_read(wm831x, ctrl_reg); 131 if (ret < 0) 132 return ret; 133 134 if (ret & WM831X_LDO1_LP_MODE) 135 return REGULATOR_MODE_STANDBY; 136 else 137 return REGULATOR_MODE_IDLE; 138 } 139 140 static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, 141 unsigned int mode) 142 { 143 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 144 struct wm831x *wm831x = ldo->wm831x; 145 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; 146 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; 147 int ret; 148 149 150 switch (mode) { 151 case REGULATOR_MODE_NORMAL: 152 ret = wm831x_set_bits(wm831x, on_reg, 153 WM831X_LDO1_ON_MODE, 0); 154 if (ret < 0) 155 return ret; 156 break; 157 158 case REGULATOR_MODE_IDLE: 159 ret = wm831x_set_bits(wm831x, ctrl_reg, 160 WM831X_LDO1_LP_MODE, 0); 161 if (ret < 0) 162 return ret; 163 164 ret = wm831x_set_bits(wm831x, on_reg, 165 WM831X_LDO1_ON_MODE, 166 WM831X_LDO1_ON_MODE); 167 if (ret < 0) 168 return ret; 169 break; 170 171 case REGULATOR_MODE_STANDBY: 172 ret = wm831x_set_bits(wm831x, ctrl_reg, 173 WM831X_LDO1_LP_MODE, 174 WM831X_LDO1_LP_MODE); 175 if (ret < 0) 176 return ret; 177 178 ret = wm831x_set_bits(wm831x, on_reg, 179 WM831X_LDO1_ON_MODE, 180 WM831X_LDO1_ON_MODE); 181 if (ret < 0) 182 return ret; 183 break; 184 185 default: 186 return -EINVAL; 187 } 188 189 return 0; 190 } 191 192 static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) 193 { 194 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 195 struct wm831x *wm831x = ldo->wm831x; 196 int mask = 1 << rdev_get_id(rdev); 197 int ret; 198 199 /* Is the regulator on? */ 200 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); 201 if (ret < 0) 202 return ret; 203 if (!(ret & mask)) 204 return REGULATOR_STATUS_OFF; 205 206 /* Is it reporting under voltage? */ 207 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); 208 if (ret < 0) 209 return ret; 210 if (ret & mask) 211 return REGULATOR_STATUS_ERROR; 212 213 ret = wm831x_gp_ldo_get_mode(rdev); 214 if (ret < 0) 215 return ret; 216 else 217 return regulator_mode_to_status(ret); 218 } 219 220 static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, 221 int input_uV, 222 int output_uV, int load_uA) 223 { 224 if (load_uA < 20000) 225 return REGULATOR_MODE_STANDBY; 226 if (load_uA < 50000) 227 return REGULATOR_MODE_IDLE; 228 return REGULATOR_MODE_NORMAL; 229 } 230 231 232 static struct regulator_ops wm831x_gp_ldo_ops = { 233 .list_voltage = wm831x_gp_ldo_list_voltage, 234 .map_voltage = wm831x_gp_ldo_map_voltage, 235 .get_voltage_sel = regulator_get_voltage_sel_regmap, 236 .set_voltage_sel = regulator_set_voltage_sel_regmap, 237 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, 238 .get_mode = wm831x_gp_ldo_get_mode, 239 .set_mode = wm831x_gp_ldo_set_mode, 240 .get_status = wm831x_gp_ldo_get_status, 241 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, 242 .get_bypass = regulator_get_bypass_regmap, 243 .set_bypass = regulator_set_bypass_regmap, 244 245 .is_enabled = regulator_is_enabled_regmap, 246 .enable = regulator_enable_regmap, 247 .disable = regulator_disable_regmap, 248 }; 249 250 static int wm831x_gp_ldo_probe(struct platform_device *pdev) 251 { 252 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 253 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 254 struct regulator_config config = { }; 255 int id; 256 struct wm831x_ldo *ldo; 257 struct resource *res; 258 int ret, irq; 259 260 if (pdata && pdata->wm831x_num) 261 id = (pdata->wm831x_num * 10) + 1; 262 else 263 id = 0; 264 id = pdev->id - id; 265 266 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); 267 268 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); 269 if (ldo == NULL) { 270 dev_err(&pdev->dev, "Unable to allocate private data\n"); 271 return -ENOMEM; 272 } 273 274 ldo->wm831x = wm831x; 275 276 res = platform_get_resource(pdev, IORESOURCE_REG, 0); 277 if (res == NULL) { 278 dev_err(&pdev->dev, "No REG resource\n"); 279 ret = -EINVAL; 280 goto err; 281 } 282 ldo->base = res->start; 283 284 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); 285 ldo->desc.name = ldo->name; 286 287 snprintf(ldo->supply_name, sizeof(ldo->supply_name), 288 "LDO%dVDD", id + 1); 289 ldo->desc.supply_name = ldo->supply_name; 290 291 ldo->desc.id = id; 292 ldo->desc.type = REGULATOR_VOLTAGE; 293 ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; 294 ldo->desc.ops = &wm831x_gp_ldo_ops; 295 ldo->desc.owner = THIS_MODULE; 296 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; 297 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; 298 ldo->desc.enable_reg = WM831X_LDO_ENABLE; 299 ldo->desc.enable_mask = 1 << id; 300 ldo->desc.bypass_reg = ldo->base; 301 ldo->desc.bypass_mask = WM831X_LDO1_SWI; 302 303 config.dev = pdev->dev.parent; 304 if (pdata) 305 config.init_data = pdata->ldo[id]; 306 config.driver_data = ldo; 307 config.regmap = wm831x->regmap; 308 309 ldo->regulator = regulator_register(&ldo->desc, &config); 310 if (IS_ERR(ldo->regulator)) { 311 ret = PTR_ERR(ldo->regulator); 312 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", 313 id + 1, ret); 314 goto err; 315 } 316 317 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 318 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, 319 IRQF_TRIGGER_RISING, ldo->name, 320 ldo); 321 if (ret != 0) { 322 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 323 irq, ret); 324 goto err_regulator; 325 } 326 327 platform_set_drvdata(pdev, ldo); 328 329 return 0; 330 331 err_regulator: 332 regulator_unregister(ldo->regulator); 333 err: 334 return ret; 335 } 336 337 static int wm831x_gp_ldo_remove(struct platform_device *pdev) 338 { 339 struct wm831x_ldo *ldo = platform_get_drvdata(pdev); 340 341 free_irq(wm831x_irq(ldo->wm831x, 342 platform_get_irq_byname(pdev, "UV")), ldo); 343 regulator_unregister(ldo->regulator); 344 345 return 0; 346 } 347 348 static struct platform_driver wm831x_gp_ldo_driver = { 349 .probe = wm831x_gp_ldo_probe, 350 .remove = wm831x_gp_ldo_remove, 351 .driver = { 352 .name = "wm831x-ldo", 353 .owner = THIS_MODULE, 354 }, 355 }; 356 357 /* 358 * Analogue LDOs 359 */ 360 361 362 #define WM831X_ALDO_SELECTOR_LOW 0xc 363 #define WM831X_ALDO_MAX_SELECTOR 0x1f 364 365 static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, 366 unsigned int selector) 367 { 368 /* 1-1.6V in 50mV steps */ 369 if (selector <= WM831X_ALDO_SELECTOR_LOW) 370 return 1000000 + (selector * 50000); 371 /* 1.7-3.5V in 100mV steps */ 372 if (selector <= WM831X_ALDO_MAX_SELECTOR) 373 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) 374 * 100000); 375 return -EINVAL; 376 } 377 378 static int wm831x_aldo_map_voltage(struct regulator_dev *rdev, 379 int min_uV, int max_uV) 380 { 381 int volt, vsel; 382 383 if (min_uV < 1000000) 384 vsel = 0; 385 else if (min_uV < 1700000) 386 vsel = ((min_uV - 1000000) / 50000); 387 else 388 vsel = ((min_uV - 1700000) / 100000) 389 + WM831X_ALDO_SELECTOR_LOW + 1; 390 391 volt = wm831x_aldo_list_voltage(rdev, vsel); 392 if (volt < min_uV || volt > max_uV) 393 return -EINVAL; 394 395 return vsel; 396 397 } 398 399 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, 400 int uV) 401 { 402 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 403 struct wm831x *wm831x = ldo->wm831x; 404 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; 405 406 sel = wm831x_aldo_map_voltage(rdev, uV, uV); 407 if (sel < 0) 408 return sel; 409 410 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel); 411 } 412 413 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) 414 { 415 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 416 struct wm831x *wm831x = ldo->wm831x; 417 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; 418 int ret; 419 420 ret = wm831x_reg_read(wm831x, on_reg); 421 if (ret < 0) 422 return 0; 423 424 if (ret & WM831X_LDO7_ON_MODE) 425 return REGULATOR_MODE_IDLE; 426 else 427 return REGULATOR_MODE_NORMAL; 428 } 429 430 static int wm831x_aldo_set_mode(struct regulator_dev *rdev, 431 unsigned int mode) 432 { 433 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 434 struct wm831x *wm831x = ldo->wm831x; 435 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; 436 int ret; 437 438 439 switch (mode) { 440 case REGULATOR_MODE_NORMAL: 441 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); 442 if (ret < 0) 443 return ret; 444 break; 445 446 case REGULATOR_MODE_IDLE: 447 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 448 WM831X_LDO7_ON_MODE); 449 if (ret < 0) 450 return ret; 451 break; 452 453 default: 454 return -EINVAL; 455 } 456 457 return 0; 458 } 459 460 static int wm831x_aldo_get_status(struct regulator_dev *rdev) 461 { 462 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 463 struct wm831x *wm831x = ldo->wm831x; 464 int mask = 1 << rdev_get_id(rdev); 465 int ret; 466 467 /* Is the regulator on? */ 468 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); 469 if (ret < 0) 470 return ret; 471 if (!(ret & mask)) 472 return REGULATOR_STATUS_OFF; 473 474 /* Is it reporting under voltage? */ 475 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); 476 if (ret < 0) 477 return ret; 478 if (ret & mask) 479 return REGULATOR_STATUS_ERROR; 480 481 ret = wm831x_aldo_get_mode(rdev); 482 if (ret < 0) 483 return ret; 484 else 485 return regulator_mode_to_status(ret); 486 } 487 488 static struct regulator_ops wm831x_aldo_ops = { 489 .list_voltage = wm831x_aldo_list_voltage, 490 .map_voltage = wm831x_aldo_map_voltage, 491 .get_voltage_sel = regulator_get_voltage_sel_regmap, 492 .set_voltage_sel = regulator_set_voltage_sel_regmap, 493 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, 494 .get_mode = wm831x_aldo_get_mode, 495 .set_mode = wm831x_aldo_set_mode, 496 .get_status = wm831x_aldo_get_status, 497 .set_bypass = regulator_set_bypass_regmap, 498 .get_bypass = regulator_get_bypass_regmap, 499 500 .is_enabled = regulator_is_enabled_regmap, 501 .enable = regulator_enable_regmap, 502 .disable = regulator_disable_regmap, 503 }; 504 505 static int wm831x_aldo_probe(struct platform_device *pdev) 506 { 507 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 508 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 509 struct regulator_config config = { }; 510 int id; 511 struct wm831x_ldo *ldo; 512 struct resource *res; 513 int ret, irq; 514 515 if (pdata && pdata->wm831x_num) 516 id = (pdata->wm831x_num * 10) + 1; 517 else 518 id = 0; 519 id = pdev->id - id; 520 521 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); 522 523 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); 524 if (ldo == NULL) { 525 dev_err(&pdev->dev, "Unable to allocate private data\n"); 526 return -ENOMEM; 527 } 528 529 ldo->wm831x = wm831x; 530 531 res = platform_get_resource(pdev, IORESOURCE_REG, 0); 532 if (res == NULL) { 533 dev_err(&pdev->dev, "No REG resource\n"); 534 ret = -EINVAL; 535 goto err; 536 } 537 ldo->base = res->start; 538 539 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); 540 ldo->desc.name = ldo->name; 541 542 snprintf(ldo->supply_name, sizeof(ldo->supply_name), 543 "LDO%dVDD", id + 1); 544 ldo->desc.supply_name = ldo->supply_name; 545 546 ldo->desc.id = id; 547 ldo->desc.type = REGULATOR_VOLTAGE; 548 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; 549 ldo->desc.ops = &wm831x_aldo_ops; 550 ldo->desc.owner = THIS_MODULE; 551 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; 552 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; 553 ldo->desc.enable_reg = WM831X_LDO_ENABLE; 554 ldo->desc.enable_mask = 1 << id; 555 ldo->desc.bypass_reg = ldo->base; 556 ldo->desc.bypass_mask = WM831X_LDO7_SWI; 557 558 config.dev = pdev->dev.parent; 559 if (pdata) 560 config.init_data = pdata->ldo[id]; 561 config.driver_data = ldo; 562 config.regmap = wm831x->regmap; 563 564 ldo->regulator = regulator_register(&ldo->desc, &config); 565 if (IS_ERR(ldo->regulator)) { 566 ret = PTR_ERR(ldo->regulator); 567 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", 568 id + 1, ret); 569 goto err; 570 } 571 572 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 573 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, 574 IRQF_TRIGGER_RISING, ldo->name, ldo); 575 if (ret != 0) { 576 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 577 irq, ret); 578 goto err_regulator; 579 } 580 581 platform_set_drvdata(pdev, ldo); 582 583 return 0; 584 585 err_regulator: 586 regulator_unregister(ldo->regulator); 587 err: 588 return ret; 589 } 590 591 static int wm831x_aldo_remove(struct platform_device *pdev) 592 { 593 struct wm831x_ldo *ldo = platform_get_drvdata(pdev); 594 595 free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")), 596 ldo); 597 regulator_unregister(ldo->regulator); 598 599 return 0; 600 } 601 602 static struct platform_driver wm831x_aldo_driver = { 603 .probe = wm831x_aldo_probe, 604 .remove = wm831x_aldo_remove, 605 .driver = { 606 .name = "wm831x-aldo", 607 .owner = THIS_MODULE, 608 }, 609 }; 610 611 /* 612 * Alive LDO 613 */ 614 615 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf 616 617 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, 618 int uV) 619 { 620 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 621 struct wm831x *wm831x = ldo->wm831x; 622 int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; 623 624 sel = regulator_map_voltage_linear(rdev, uV, uV); 625 if (sel < 0) 626 return sel; 627 628 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel); 629 } 630 631 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) 632 { 633 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); 634 struct wm831x *wm831x = ldo->wm831x; 635 int mask = 1 << rdev_get_id(rdev); 636 int ret; 637 638 /* Is the regulator on? */ 639 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); 640 if (ret < 0) 641 return ret; 642 if (ret & mask) 643 return REGULATOR_STATUS_ON; 644 else 645 return REGULATOR_STATUS_OFF; 646 } 647 648 static struct regulator_ops wm831x_alive_ldo_ops = { 649 .list_voltage = regulator_list_voltage_linear, 650 .map_voltage = regulator_map_voltage_linear, 651 .get_voltage_sel = regulator_get_voltage_sel_regmap, 652 .set_voltage_sel = regulator_set_voltage_sel_regmap, 653 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, 654 .get_status = wm831x_alive_ldo_get_status, 655 656 .is_enabled = regulator_is_enabled_regmap, 657 .enable = regulator_enable_regmap, 658 .disable = regulator_disable_regmap, 659 }; 660 661 static int wm831x_alive_ldo_probe(struct platform_device *pdev) 662 { 663 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 664 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 665 struct regulator_config config = { }; 666 int id; 667 struct wm831x_ldo *ldo; 668 struct resource *res; 669 int ret; 670 671 if (pdata && pdata->wm831x_num) 672 id = (pdata->wm831x_num * 10) + 1; 673 else 674 id = 0; 675 id = pdev->id - id; 676 677 678 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); 679 680 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); 681 if (ldo == NULL) { 682 dev_err(&pdev->dev, "Unable to allocate private data\n"); 683 return -ENOMEM; 684 } 685 686 ldo->wm831x = wm831x; 687 688 res = platform_get_resource(pdev, IORESOURCE_REG, 0); 689 if (res == NULL) { 690 dev_err(&pdev->dev, "No REG resource\n"); 691 ret = -EINVAL; 692 goto err; 693 } 694 ldo->base = res->start; 695 696 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); 697 ldo->desc.name = ldo->name; 698 699 snprintf(ldo->supply_name, sizeof(ldo->supply_name), 700 "LDO%dVDD", id + 1); 701 ldo->desc.supply_name = ldo->supply_name; 702 703 ldo->desc.id = id; 704 ldo->desc.type = REGULATOR_VOLTAGE; 705 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; 706 ldo->desc.ops = &wm831x_alive_ldo_ops; 707 ldo->desc.owner = THIS_MODULE; 708 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; 709 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; 710 ldo->desc.enable_reg = WM831X_LDO_ENABLE; 711 ldo->desc.enable_mask = 1 << id; 712 ldo->desc.min_uV = 800000; 713 ldo->desc.uV_step = 50000; 714 ldo->desc.enable_time = 1000; 715 716 config.dev = pdev->dev.parent; 717 if (pdata) 718 config.init_data = pdata->ldo[id]; 719 config.driver_data = ldo; 720 config.regmap = wm831x->regmap; 721 722 ldo->regulator = regulator_register(&ldo->desc, &config); 723 if (IS_ERR(ldo->regulator)) { 724 ret = PTR_ERR(ldo->regulator); 725 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", 726 id + 1, ret); 727 goto err; 728 } 729 730 platform_set_drvdata(pdev, ldo); 731 732 return 0; 733 734 err: 735 return ret; 736 } 737 738 static int wm831x_alive_ldo_remove(struct platform_device *pdev) 739 { 740 struct wm831x_ldo *ldo = platform_get_drvdata(pdev); 741 742 regulator_unregister(ldo->regulator); 743 744 return 0; 745 } 746 747 static struct platform_driver wm831x_alive_ldo_driver = { 748 .probe = wm831x_alive_ldo_probe, 749 .remove = wm831x_alive_ldo_remove, 750 .driver = { 751 .name = "wm831x-alive-ldo", 752 .owner = THIS_MODULE, 753 }, 754 }; 755 756 static int __init wm831x_ldo_init(void) 757 { 758 int ret; 759 760 ret = platform_driver_register(&wm831x_gp_ldo_driver); 761 if (ret != 0) 762 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); 763 764 ret = platform_driver_register(&wm831x_aldo_driver); 765 if (ret != 0) 766 pr_err("Failed to register WM831x ALDO driver: %d\n", ret); 767 768 ret = platform_driver_register(&wm831x_alive_ldo_driver); 769 if (ret != 0) 770 pr_err("Failed to register WM831x alive LDO driver: %d\n", 771 ret); 772 773 return 0; 774 } 775 subsys_initcall(wm831x_ldo_init); 776 777 static void __exit wm831x_ldo_exit(void) 778 { 779 platform_driver_unregister(&wm831x_alive_ldo_driver); 780 platform_driver_unregister(&wm831x_aldo_driver); 781 platform_driver_unregister(&wm831x_gp_ldo_driver); 782 } 783 module_exit(wm831x_ldo_exit); 784 785 /* Module information */ 786 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 787 MODULE_DESCRIPTION("WM831x LDO driver"); 788 MODULE_LICENSE("GPL"); 789 MODULE_ALIAS("platform:wm831x-ldo"); 790 MODULE_ALIAS("platform:wm831x-aldo"); 791 MODULE_ALIAS("platform:wm831x-aliveldo"); 792