1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // wm8350.c -- Voltage and current regulation for the Wolfson WM8350 PMIC 4 // 5 // Copyright 2007, 2008 Wolfson Microelectronics PLC. 6 // 7 // Author: Liam Girdwood 8 // linux@wolfsonmicro.com 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/init.h> 13 #include <linux/bitops.h> 14 #include <linux/err.h> 15 #include <linux/i2c.h> 16 #include <linux/mfd/wm8350/core.h> 17 #include <linux/mfd/wm8350/pmic.h> 18 #include <linux/platform_device.h> 19 #include <linux/regulator/driver.h> 20 #include <linux/regulator/machine.h> 21 22 /* Maximum value possible for VSEL */ 23 #define WM8350_DCDC_MAX_VSEL 0x66 24 25 /* Microamps */ 26 static const unsigned int isink_cur[] = { 27 4, 28 5, 29 6, 30 7, 31 8, 32 10, 33 11, 34 14, 35 16, 36 19, 37 23, 38 27, 39 32, 40 39, 41 46, 42 54, 43 65, 44 77, 45 92, 46 109, 47 130, 48 154, 49 183, 50 218, 51 259, 52 308, 53 367, 54 436, 55 518, 56 616, 57 733, 58 872, 59 1037, 60 1233, 61 1466, 62 1744, 63 2073, 64 2466, 65 2933, 66 3487, 67 4147, 68 4932, 69 5865, 70 6975, 71 8294, 72 9864, 73 11730, 74 13949, 75 16589, 76 19728, 77 23460, 78 27899, 79 33178, 80 39455, 81 46920, 82 55798, 83 66355, 84 78910, 85 93840, 86 111596, 87 132710, 88 157820, 89 187681, 90 223191 91 }; 92 93 /* turn on ISINK followed by DCDC */ 94 static int wm8350_isink_enable(struct regulator_dev *rdev) 95 { 96 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 97 int isink = rdev_get_id(rdev); 98 99 switch (isink) { 100 case WM8350_ISINK_A: 101 switch (wm8350->pmic.isink_A_dcdc) { 102 case WM8350_DCDC_2: 103 case WM8350_DCDC_5: 104 wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7, 105 WM8350_CS1_ENA); 106 wm8350_set_bits(wm8350, WM8350_CSA_FLASH_CONTROL, 107 WM8350_CS1_DRIVE); 108 wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 109 1 << (wm8350->pmic.isink_A_dcdc - 110 WM8350_DCDC_1)); 111 break; 112 default: 113 return -EINVAL; 114 } 115 break; 116 case WM8350_ISINK_B: 117 switch (wm8350->pmic.isink_B_dcdc) { 118 case WM8350_DCDC_2: 119 case WM8350_DCDC_5: 120 wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7, 121 WM8350_CS2_ENA); 122 wm8350_set_bits(wm8350, WM8350_CSB_FLASH_CONTROL, 123 WM8350_CS2_DRIVE); 124 wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 125 1 << (wm8350->pmic.isink_B_dcdc - 126 WM8350_DCDC_1)); 127 break; 128 default: 129 return -EINVAL; 130 } 131 break; 132 default: 133 return -EINVAL; 134 } 135 return 0; 136 } 137 138 static int wm8350_isink_disable(struct regulator_dev *rdev) 139 { 140 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 141 int isink = rdev_get_id(rdev); 142 143 switch (isink) { 144 case WM8350_ISINK_A: 145 switch (wm8350->pmic.isink_A_dcdc) { 146 case WM8350_DCDC_2: 147 case WM8350_DCDC_5: 148 wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 149 1 << (wm8350->pmic.isink_A_dcdc - 150 WM8350_DCDC_1)); 151 wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7, 152 WM8350_CS1_ENA); 153 break; 154 default: 155 return -EINVAL; 156 } 157 break; 158 case WM8350_ISINK_B: 159 switch (wm8350->pmic.isink_B_dcdc) { 160 case WM8350_DCDC_2: 161 case WM8350_DCDC_5: 162 wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 163 1 << (wm8350->pmic.isink_B_dcdc - 164 WM8350_DCDC_1)); 165 wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7, 166 WM8350_CS2_ENA); 167 break; 168 default: 169 return -EINVAL; 170 } 171 break; 172 default: 173 return -EINVAL; 174 } 175 return 0; 176 } 177 178 static int wm8350_isink_is_enabled(struct regulator_dev *rdev) 179 { 180 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 181 int isink = rdev_get_id(rdev); 182 183 switch (isink) { 184 case WM8350_ISINK_A: 185 return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) & 186 0x8000; 187 case WM8350_ISINK_B: 188 return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) & 189 0x8000; 190 } 191 return -EINVAL; 192 } 193 194 static int wm8350_isink_enable_time(struct regulator_dev *rdev) 195 { 196 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 197 int isink = rdev_get_id(rdev); 198 int reg; 199 200 switch (isink) { 201 case WM8350_ISINK_A: 202 reg = wm8350_reg_read(wm8350, WM8350_CSA_FLASH_CONTROL); 203 break; 204 case WM8350_ISINK_B: 205 reg = wm8350_reg_read(wm8350, WM8350_CSB_FLASH_CONTROL); 206 break; 207 default: 208 return -EINVAL; 209 } 210 211 if (reg & WM8350_CS1_FLASH_MODE) { 212 switch (reg & WM8350_CS1_ON_RAMP_MASK) { 213 case 0: 214 return 0; 215 case 1: 216 return 1950; 217 case 2: 218 return 3910; 219 case 3: 220 return 7800; 221 } 222 } else { 223 switch (reg & WM8350_CS1_ON_RAMP_MASK) { 224 case 0: 225 return 0; 226 case 1: 227 return 250000; 228 case 2: 229 return 500000; 230 case 3: 231 return 1000000; 232 } 233 } 234 235 return -EINVAL; 236 } 237 238 239 int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode, 240 u16 trigger, u16 duration, u16 on_ramp, u16 off_ramp, 241 u16 drive) 242 { 243 switch (isink) { 244 case WM8350_ISINK_A: 245 wm8350_reg_write(wm8350, WM8350_CSA_FLASH_CONTROL, 246 (mode ? WM8350_CS1_FLASH_MODE : 0) | 247 (trigger ? WM8350_CS1_TRIGSRC : 0) | 248 duration | on_ramp | off_ramp | drive); 249 break; 250 case WM8350_ISINK_B: 251 wm8350_reg_write(wm8350, WM8350_CSB_FLASH_CONTROL, 252 (mode ? WM8350_CS2_FLASH_MODE : 0) | 253 (trigger ? WM8350_CS2_TRIGSRC : 0) | 254 duration | on_ramp | off_ramp | drive); 255 break; 256 default: 257 return -EINVAL; 258 } 259 return 0; 260 } 261 EXPORT_SYMBOL_GPL(wm8350_isink_set_flash); 262 263 static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV) 264 { 265 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 266 int sel, volt_reg, dcdc = rdev_get_id(rdev); 267 u16 val; 268 269 dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, dcdc, uV / 1000); 270 271 switch (dcdc) { 272 case WM8350_DCDC_1: 273 volt_reg = WM8350_DCDC1_LOW_POWER; 274 break; 275 case WM8350_DCDC_3: 276 volt_reg = WM8350_DCDC3_LOW_POWER; 277 break; 278 case WM8350_DCDC_4: 279 volt_reg = WM8350_DCDC4_LOW_POWER; 280 break; 281 case WM8350_DCDC_6: 282 volt_reg = WM8350_DCDC6_LOW_POWER; 283 break; 284 case WM8350_DCDC_2: 285 case WM8350_DCDC_5: 286 default: 287 return -EINVAL; 288 } 289 290 sel = regulator_map_voltage_linear(rdev, uV, uV); 291 if (sel < 0) 292 return sel; 293 294 /* all DCDCs have same mV bits */ 295 val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK; 296 wm8350_reg_write(wm8350, volt_reg, val | sel); 297 return 0; 298 } 299 300 static int wm8350_dcdc_set_suspend_enable(struct regulator_dev *rdev) 301 { 302 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 303 int dcdc = rdev_get_id(rdev); 304 u16 val; 305 306 switch (dcdc) { 307 case WM8350_DCDC_1: 308 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER) 309 & ~WM8350_DCDC_HIB_MODE_MASK; 310 wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER, 311 val | wm8350->pmic.dcdc1_hib_mode); 312 break; 313 case WM8350_DCDC_3: 314 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER) 315 & ~WM8350_DCDC_HIB_MODE_MASK; 316 wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER, 317 val | wm8350->pmic.dcdc3_hib_mode); 318 break; 319 case WM8350_DCDC_4: 320 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER) 321 & ~WM8350_DCDC_HIB_MODE_MASK; 322 wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER, 323 val | wm8350->pmic.dcdc4_hib_mode); 324 break; 325 case WM8350_DCDC_6: 326 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER) 327 & ~WM8350_DCDC_HIB_MODE_MASK; 328 wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER, 329 val | wm8350->pmic.dcdc6_hib_mode); 330 break; 331 case WM8350_DCDC_2: 332 case WM8350_DCDC_5: 333 default: 334 return -EINVAL; 335 } 336 337 return 0; 338 } 339 340 static int wm8350_dcdc_set_suspend_disable(struct regulator_dev *rdev) 341 { 342 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 343 int dcdc = rdev_get_id(rdev); 344 u16 val; 345 346 switch (dcdc) { 347 case WM8350_DCDC_1: 348 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER); 349 wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 350 wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER, 351 val | WM8350_DCDC_HIB_MODE_DIS); 352 break; 353 case WM8350_DCDC_3: 354 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER); 355 wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 356 wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER, 357 val | WM8350_DCDC_HIB_MODE_DIS); 358 break; 359 case WM8350_DCDC_4: 360 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER); 361 wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 362 wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER, 363 val | WM8350_DCDC_HIB_MODE_DIS); 364 break; 365 case WM8350_DCDC_6: 366 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER); 367 wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 368 wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER, 369 val | WM8350_DCDC_HIB_MODE_DIS); 370 break; 371 case WM8350_DCDC_2: 372 case WM8350_DCDC_5: 373 default: 374 return -EINVAL; 375 } 376 377 return 0; 378 } 379 380 static int wm8350_dcdc25_set_suspend_enable(struct regulator_dev *rdev) 381 { 382 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 383 int dcdc = rdev_get_id(rdev); 384 u16 val; 385 386 switch (dcdc) { 387 case WM8350_DCDC_2: 388 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL) 389 & ~WM8350_DC2_HIB_MODE_MASK; 390 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val | 391 (WM8350_DC2_HIB_MODE_ACTIVE << WM8350_DC2_HIB_MODE_SHIFT)); 392 break; 393 case WM8350_DCDC_5: 394 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL) 395 & ~WM8350_DC5_HIB_MODE_MASK; 396 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val | 397 (WM8350_DC5_HIB_MODE_ACTIVE << WM8350_DC5_HIB_MODE_SHIFT)); 398 break; 399 default: 400 return -EINVAL; 401 } 402 return 0; 403 } 404 405 static int wm8350_dcdc25_set_suspend_disable(struct regulator_dev *rdev) 406 { 407 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 408 int dcdc = rdev_get_id(rdev); 409 u16 val; 410 411 switch (dcdc) { 412 case WM8350_DCDC_2: 413 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL) 414 & ~WM8350_DC2_HIB_MODE_MASK; 415 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val | 416 (WM8350_DC2_HIB_MODE_DISABLE << WM8350_DC2_HIB_MODE_SHIFT)); 417 break; 418 case WM8350_DCDC_5: 419 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL) 420 & ~WM8350_DC5_HIB_MODE_MASK; 421 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val | 422 (WM8350_DC5_HIB_MODE_DISABLE << WM8350_DC5_HIB_MODE_SHIFT)); 423 break; 424 default: 425 return -EINVAL; 426 } 427 return 0; 428 } 429 430 static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev, 431 unsigned int mode) 432 { 433 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 434 int dcdc = rdev_get_id(rdev); 435 u16 *hib_mode; 436 437 switch (dcdc) { 438 case WM8350_DCDC_1: 439 hib_mode = &wm8350->pmic.dcdc1_hib_mode; 440 break; 441 case WM8350_DCDC_3: 442 hib_mode = &wm8350->pmic.dcdc3_hib_mode; 443 break; 444 case WM8350_DCDC_4: 445 hib_mode = &wm8350->pmic.dcdc4_hib_mode; 446 break; 447 case WM8350_DCDC_6: 448 hib_mode = &wm8350->pmic.dcdc6_hib_mode; 449 break; 450 case WM8350_DCDC_2: 451 case WM8350_DCDC_5: 452 default: 453 return -EINVAL; 454 } 455 456 switch (mode) { 457 case REGULATOR_MODE_NORMAL: 458 *hib_mode = WM8350_DCDC_HIB_MODE_IMAGE; 459 break; 460 case REGULATOR_MODE_IDLE: 461 *hib_mode = WM8350_DCDC_HIB_MODE_STANDBY; 462 break; 463 case REGULATOR_MODE_STANDBY: 464 *hib_mode = WM8350_DCDC_HIB_MODE_LDO_IM; 465 break; 466 default: 467 return -EINVAL; 468 } 469 470 return 0; 471 } 472 473 static const struct linear_range wm8350_ldo_ranges[] = { 474 REGULATOR_LINEAR_RANGE(900000, 0, 15, 50000), 475 REGULATOR_LINEAR_RANGE(1800000, 16, 31, 100000), 476 }; 477 478 static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV) 479 { 480 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 481 int sel, volt_reg, ldo = rdev_get_id(rdev); 482 u16 val; 483 484 dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, ldo, uV / 1000); 485 486 switch (ldo) { 487 case WM8350_LDO_1: 488 volt_reg = WM8350_LDO1_LOW_POWER; 489 break; 490 case WM8350_LDO_2: 491 volt_reg = WM8350_LDO2_LOW_POWER; 492 break; 493 case WM8350_LDO_3: 494 volt_reg = WM8350_LDO3_LOW_POWER; 495 break; 496 case WM8350_LDO_4: 497 volt_reg = WM8350_LDO4_LOW_POWER; 498 break; 499 default: 500 return -EINVAL; 501 } 502 503 sel = regulator_map_voltage_linear_range(rdev, uV, uV); 504 if (sel < 0) 505 return sel; 506 507 /* all LDOs have same mV bits */ 508 val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK; 509 wm8350_reg_write(wm8350, volt_reg, val | sel); 510 return 0; 511 } 512 513 static int wm8350_ldo_set_suspend_enable(struct regulator_dev *rdev) 514 { 515 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 516 int volt_reg, ldo = rdev_get_id(rdev); 517 u16 val; 518 519 switch (ldo) { 520 case WM8350_LDO_1: 521 volt_reg = WM8350_LDO1_LOW_POWER; 522 break; 523 case WM8350_LDO_2: 524 volt_reg = WM8350_LDO2_LOW_POWER; 525 break; 526 case WM8350_LDO_3: 527 volt_reg = WM8350_LDO3_LOW_POWER; 528 break; 529 case WM8350_LDO_4: 530 volt_reg = WM8350_LDO4_LOW_POWER; 531 break; 532 default: 533 return -EINVAL; 534 } 535 536 /* all LDOs have same mV bits */ 537 val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK; 538 wm8350_reg_write(wm8350, volt_reg, val); 539 return 0; 540 } 541 542 static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev) 543 { 544 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 545 int volt_reg, ldo = rdev_get_id(rdev); 546 u16 val; 547 548 switch (ldo) { 549 case WM8350_LDO_1: 550 volt_reg = WM8350_LDO1_LOW_POWER; 551 break; 552 case WM8350_LDO_2: 553 volt_reg = WM8350_LDO2_LOW_POWER; 554 break; 555 case WM8350_LDO_3: 556 volt_reg = WM8350_LDO3_LOW_POWER; 557 break; 558 case WM8350_LDO_4: 559 volt_reg = WM8350_LDO4_LOW_POWER; 560 break; 561 default: 562 return -EINVAL; 563 } 564 565 /* all LDOs have same mV bits */ 566 val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK; 567 wm8350_reg_write(wm8350, volt_reg, val | WM8350_LDO1_HIB_MODE_DIS); 568 return 0; 569 } 570 571 int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start, 572 u16 stop, u16 fault) 573 { 574 int slot_reg; 575 u16 val; 576 577 dev_dbg(wm8350->dev, "%s %d start %d stop %d\n", 578 __func__, dcdc, start, stop); 579 580 /* slot valid ? */ 581 if (start > 15 || stop > 15) 582 return -EINVAL; 583 584 switch (dcdc) { 585 case WM8350_DCDC_1: 586 slot_reg = WM8350_DCDC1_TIMEOUTS; 587 break; 588 case WM8350_DCDC_2: 589 slot_reg = WM8350_DCDC2_TIMEOUTS; 590 break; 591 case WM8350_DCDC_3: 592 slot_reg = WM8350_DCDC3_TIMEOUTS; 593 break; 594 case WM8350_DCDC_4: 595 slot_reg = WM8350_DCDC4_TIMEOUTS; 596 break; 597 case WM8350_DCDC_5: 598 slot_reg = WM8350_DCDC5_TIMEOUTS; 599 break; 600 case WM8350_DCDC_6: 601 slot_reg = WM8350_DCDC6_TIMEOUTS; 602 break; 603 default: 604 return -EINVAL; 605 } 606 607 val = wm8350_reg_read(wm8350, slot_reg) & 608 ~(WM8350_DC1_ENSLOT_MASK | WM8350_DC1_SDSLOT_MASK | 609 WM8350_DC1_ERRACT_MASK); 610 wm8350_reg_write(wm8350, slot_reg, 611 val | (start << WM8350_DC1_ENSLOT_SHIFT) | 612 (stop << WM8350_DC1_SDSLOT_SHIFT) | 613 (fault << WM8350_DC1_ERRACT_SHIFT)); 614 615 return 0; 616 } 617 EXPORT_SYMBOL_GPL(wm8350_dcdc_set_slot); 618 619 int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop) 620 { 621 int slot_reg; 622 u16 val; 623 624 dev_dbg(wm8350->dev, "%s %d start %d stop %d\n", 625 __func__, ldo, start, stop); 626 627 /* slot valid ? */ 628 if (start > 15 || stop > 15) 629 return -EINVAL; 630 631 switch (ldo) { 632 case WM8350_LDO_1: 633 slot_reg = WM8350_LDO1_TIMEOUTS; 634 break; 635 case WM8350_LDO_2: 636 slot_reg = WM8350_LDO2_TIMEOUTS; 637 break; 638 case WM8350_LDO_3: 639 slot_reg = WM8350_LDO3_TIMEOUTS; 640 break; 641 case WM8350_LDO_4: 642 slot_reg = WM8350_LDO4_TIMEOUTS; 643 break; 644 default: 645 return -EINVAL; 646 } 647 648 val = wm8350_reg_read(wm8350, slot_reg) & ~WM8350_LDO1_SDSLOT_MASK; 649 wm8350_reg_write(wm8350, slot_reg, val | ((start << 10) | (stop << 6))); 650 return 0; 651 } 652 EXPORT_SYMBOL_GPL(wm8350_ldo_set_slot); 653 654 int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode, 655 u16 ilim, u16 ramp, u16 feedback) 656 { 657 u16 val; 658 659 dev_dbg(wm8350->dev, "%s %d mode: %s %s\n", __func__, dcdc, 660 mode ? "normal" : "boost", ilim ? "low" : "normal"); 661 662 switch (dcdc) { 663 case WM8350_DCDC_2: 664 val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL) 665 & ~(WM8350_DC2_MODE_MASK | WM8350_DC2_ILIM_MASK | 666 WM8350_DC2_RMP_MASK | WM8350_DC2_FBSRC_MASK); 667 wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val | 668 (mode << WM8350_DC2_MODE_SHIFT) | 669 (ilim << WM8350_DC2_ILIM_SHIFT) | 670 (ramp << WM8350_DC2_RMP_SHIFT) | 671 (feedback << WM8350_DC2_FBSRC_SHIFT)); 672 break; 673 case WM8350_DCDC_5: 674 val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL) 675 & ~(WM8350_DC5_MODE_MASK | WM8350_DC5_ILIM_MASK | 676 WM8350_DC5_RMP_MASK | WM8350_DC5_FBSRC_MASK); 677 wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val | 678 (mode << WM8350_DC5_MODE_SHIFT) | 679 (ilim << WM8350_DC5_ILIM_SHIFT) | 680 (ramp << WM8350_DC5_RMP_SHIFT) | 681 (feedback << WM8350_DC5_FBSRC_SHIFT)); 682 break; 683 default: 684 return -EINVAL; 685 } 686 687 return 0; 688 } 689 EXPORT_SYMBOL_GPL(wm8350_dcdc25_set_mode); 690 691 static int force_continuous_enable(struct wm8350 *wm8350, int dcdc, int enable) 692 { 693 int reg = 0, ret; 694 695 switch (dcdc) { 696 case WM8350_DCDC_1: 697 reg = WM8350_DCDC1_FORCE_PWM; 698 break; 699 case WM8350_DCDC_3: 700 reg = WM8350_DCDC3_FORCE_PWM; 701 break; 702 case WM8350_DCDC_4: 703 reg = WM8350_DCDC4_FORCE_PWM; 704 break; 705 case WM8350_DCDC_6: 706 reg = WM8350_DCDC6_FORCE_PWM; 707 break; 708 default: 709 return -EINVAL; 710 } 711 712 if (enable) 713 ret = wm8350_set_bits(wm8350, reg, 714 WM8350_DCDC1_FORCE_PWM_ENA); 715 else 716 ret = wm8350_clear_bits(wm8350, reg, 717 WM8350_DCDC1_FORCE_PWM_ENA); 718 return ret; 719 } 720 721 static int wm8350_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 722 { 723 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 724 int dcdc = rdev_get_id(rdev); 725 u16 val; 726 727 if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6) 728 return -EINVAL; 729 730 if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5) 731 return -EINVAL; 732 733 val = 1 << (dcdc - WM8350_DCDC_1); 734 735 switch (mode) { 736 case REGULATOR_MODE_FAST: 737 /* force continuous mode */ 738 wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val); 739 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); 740 force_continuous_enable(wm8350, dcdc, 1); 741 break; 742 case REGULATOR_MODE_NORMAL: 743 /* active / pulse skipping */ 744 wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val); 745 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); 746 force_continuous_enable(wm8350, dcdc, 0); 747 break; 748 case REGULATOR_MODE_IDLE: 749 /* standby mode */ 750 force_continuous_enable(wm8350, dcdc, 0); 751 wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); 752 wm8350_clear_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val); 753 break; 754 case REGULATOR_MODE_STANDBY: 755 /* LDO mode */ 756 force_continuous_enable(wm8350, dcdc, 0); 757 wm8350_set_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); 758 break; 759 } 760 761 return 0; 762 } 763 764 static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev) 765 { 766 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 767 int dcdc = rdev_get_id(rdev); 768 u16 mask, sleep, active, force; 769 int mode = REGULATOR_MODE_NORMAL; 770 int reg; 771 772 switch (dcdc) { 773 case WM8350_DCDC_1: 774 reg = WM8350_DCDC1_FORCE_PWM; 775 break; 776 case WM8350_DCDC_3: 777 reg = WM8350_DCDC3_FORCE_PWM; 778 break; 779 case WM8350_DCDC_4: 780 reg = WM8350_DCDC4_FORCE_PWM; 781 break; 782 case WM8350_DCDC_6: 783 reg = WM8350_DCDC6_FORCE_PWM; 784 break; 785 default: 786 return -EINVAL; 787 } 788 789 mask = 1 << (dcdc - WM8350_DCDC_1); 790 active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask; 791 force = wm8350_reg_read(wm8350, reg) & WM8350_DCDC1_FORCE_PWM_ENA; 792 sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask; 793 794 dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x", 795 mask, active, sleep, force); 796 797 if (active && !sleep) { 798 if (force) 799 mode = REGULATOR_MODE_FAST; 800 else 801 mode = REGULATOR_MODE_NORMAL; 802 } else if (!active && !sleep) 803 mode = REGULATOR_MODE_IDLE; 804 else if (sleep) 805 mode = REGULATOR_MODE_STANDBY; 806 807 return mode; 808 } 809 810 static unsigned int wm8350_ldo_get_mode(struct regulator_dev *rdev) 811 { 812 return REGULATOR_MODE_NORMAL; 813 } 814 815 struct wm8350_dcdc_efficiency { 816 int uA_load_min; 817 int uA_load_max; 818 unsigned int mode; 819 }; 820 821 static const struct wm8350_dcdc_efficiency dcdc1_6_efficiency[] = { 822 {0, 10000, REGULATOR_MODE_STANDBY}, /* 0 - 10mA - LDO */ 823 {10000, 100000, REGULATOR_MODE_IDLE}, /* 10mA - 100mA - Standby */ 824 {100000, 1000000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */ 825 {-1, -1, REGULATOR_MODE_NORMAL}, 826 }; 827 828 static const struct wm8350_dcdc_efficiency dcdc3_4_efficiency[] = { 829 {0, 10000, REGULATOR_MODE_STANDBY}, /* 0 - 10mA - LDO */ 830 {10000, 100000, REGULATOR_MODE_IDLE}, /* 10mA - 100mA - Standby */ 831 {100000, 800000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */ 832 {-1, -1, REGULATOR_MODE_NORMAL}, 833 }; 834 835 static unsigned int get_mode(int uA, const struct wm8350_dcdc_efficiency *eff) 836 { 837 int i = 0; 838 839 while (eff[i].uA_load_min != -1) { 840 if (uA >= eff[i].uA_load_min && uA <= eff[i].uA_load_max) 841 return eff[i].mode; 842 i++; 843 } 844 return REGULATOR_MODE_NORMAL; 845 } 846 847 /* Query the regulator for it's most efficient mode @ uV,uA 848 * WM8350 regulator efficiency is pretty similar over 849 * different input and output uV. 850 */ 851 static unsigned int wm8350_dcdc_get_optimum_mode(struct regulator_dev *rdev, 852 int input_uV, int output_uV, 853 int output_uA) 854 { 855 int dcdc = rdev_get_id(rdev), mode; 856 857 switch (dcdc) { 858 case WM8350_DCDC_1: 859 case WM8350_DCDC_6: 860 mode = get_mode(output_uA, dcdc1_6_efficiency); 861 break; 862 case WM8350_DCDC_3: 863 case WM8350_DCDC_4: 864 mode = get_mode(output_uA, dcdc3_4_efficiency); 865 break; 866 default: 867 mode = REGULATOR_MODE_NORMAL; 868 break; 869 } 870 return mode; 871 } 872 873 static const struct regulator_ops wm8350_dcdc_ops = { 874 .set_voltage_sel = regulator_set_voltage_sel_regmap, 875 .get_voltage_sel = regulator_get_voltage_sel_regmap, 876 .list_voltage = regulator_list_voltage_linear, 877 .map_voltage = regulator_map_voltage_linear, 878 .enable = regulator_enable_regmap, 879 .disable = regulator_disable_regmap, 880 .is_enabled = regulator_is_enabled_regmap, 881 .get_mode = wm8350_dcdc_get_mode, 882 .set_mode = wm8350_dcdc_set_mode, 883 .get_optimum_mode = wm8350_dcdc_get_optimum_mode, 884 .set_suspend_voltage = wm8350_dcdc_set_suspend_voltage, 885 .set_suspend_enable = wm8350_dcdc_set_suspend_enable, 886 .set_suspend_disable = wm8350_dcdc_set_suspend_disable, 887 .set_suspend_mode = wm8350_dcdc_set_suspend_mode, 888 }; 889 890 static const struct regulator_ops wm8350_dcdc2_5_ops = { 891 .enable = regulator_enable_regmap, 892 .disable = regulator_disable_regmap, 893 .is_enabled = regulator_is_enabled_regmap, 894 .set_suspend_enable = wm8350_dcdc25_set_suspend_enable, 895 .set_suspend_disable = wm8350_dcdc25_set_suspend_disable, 896 }; 897 898 static const struct regulator_ops wm8350_ldo_ops = { 899 .map_voltage = regulator_map_voltage_linear_range, 900 .set_voltage_sel = regulator_set_voltage_sel_regmap, 901 .get_voltage_sel = regulator_get_voltage_sel_regmap, 902 .list_voltage = regulator_list_voltage_linear_range, 903 .enable = regulator_enable_regmap, 904 .disable = regulator_disable_regmap, 905 .is_enabled = regulator_is_enabled_regmap, 906 .get_mode = wm8350_ldo_get_mode, 907 .set_suspend_voltage = wm8350_ldo_set_suspend_voltage, 908 .set_suspend_enable = wm8350_ldo_set_suspend_enable, 909 .set_suspend_disable = wm8350_ldo_set_suspend_disable, 910 }; 911 912 static const struct regulator_ops wm8350_isink_ops = { 913 .set_current_limit = regulator_set_current_limit_regmap, 914 .get_current_limit = regulator_get_current_limit_regmap, 915 .enable = wm8350_isink_enable, 916 .disable = wm8350_isink_disable, 917 .is_enabled = wm8350_isink_is_enabled, 918 .enable_time = wm8350_isink_enable_time, 919 }; 920 921 static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = { 922 { 923 .name = "DCDC1", 924 .id = WM8350_DCDC_1, 925 .ops = &wm8350_dcdc_ops, 926 .irq = WM8350_IRQ_UV_DC1, 927 .type = REGULATOR_VOLTAGE, 928 .n_voltages = WM8350_DCDC_MAX_VSEL + 1, 929 .min_uV = 850000, 930 .uV_step = 25000, 931 .vsel_reg = WM8350_DCDC1_CONTROL, 932 .vsel_mask = WM8350_DC1_VSEL_MASK, 933 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 934 .enable_mask = WM8350_DC1_ENA, 935 .owner = THIS_MODULE, 936 }, 937 { 938 .name = "DCDC2", 939 .id = WM8350_DCDC_2, 940 .ops = &wm8350_dcdc2_5_ops, 941 .irq = WM8350_IRQ_UV_DC2, 942 .type = REGULATOR_VOLTAGE, 943 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 944 .enable_mask = WM8350_DC2_ENA, 945 .owner = THIS_MODULE, 946 }, 947 { 948 .name = "DCDC3", 949 .id = WM8350_DCDC_3, 950 .ops = &wm8350_dcdc_ops, 951 .irq = WM8350_IRQ_UV_DC3, 952 .type = REGULATOR_VOLTAGE, 953 .n_voltages = WM8350_DCDC_MAX_VSEL + 1, 954 .min_uV = 850000, 955 .uV_step = 25000, 956 .vsel_reg = WM8350_DCDC3_CONTROL, 957 .vsel_mask = WM8350_DC3_VSEL_MASK, 958 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 959 .enable_mask = WM8350_DC3_ENA, 960 .owner = THIS_MODULE, 961 }, 962 { 963 .name = "DCDC4", 964 .id = WM8350_DCDC_4, 965 .ops = &wm8350_dcdc_ops, 966 .irq = WM8350_IRQ_UV_DC4, 967 .type = REGULATOR_VOLTAGE, 968 .n_voltages = WM8350_DCDC_MAX_VSEL + 1, 969 .min_uV = 850000, 970 .uV_step = 25000, 971 .vsel_reg = WM8350_DCDC4_CONTROL, 972 .vsel_mask = WM8350_DC4_VSEL_MASK, 973 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 974 .enable_mask = WM8350_DC4_ENA, 975 .owner = THIS_MODULE, 976 }, 977 { 978 .name = "DCDC5", 979 .id = WM8350_DCDC_5, 980 .ops = &wm8350_dcdc2_5_ops, 981 .irq = WM8350_IRQ_UV_DC5, 982 .type = REGULATOR_VOLTAGE, 983 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 984 .enable_mask = WM8350_DC5_ENA, 985 .owner = THIS_MODULE, 986 }, 987 { 988 .name = "DCDC6", 989 .id = WM8350_DCDC_6, 990 .ops = &wm8350_dcdc_ops, 991 .irq = WM8350_IRQ_UV_DC6, 992 .type = REGULATOR_VOLTAGE, 993 .n_voltages = WM8350_DCDC_MAX_VSEL + 1, 994 .min_uV = 850000, 995 .uV_step = 25000, 996 .vsel_reg = WM8350_DCDC6_CONTROL, 997 .vsel_mask = WM8350_DC6_VSEL_MASK, 998 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 999 .enable_mask = WM8350_DC6_ENA, 1000 .owner = THIS_MODULE, 1001 }, 1002 { 1003 .name = "LDO1", 1004 .id = WM8350_LDO_1, 1005 .ops = &wm8350_ldo_ops, 1006 .irq = WM8350_IRQ_UV_LDO1, 1007 .type = REGULATOR_VOLTAGE, 1008 .n_voltages = WM8350_LDO1_VSEL_MASK + 1, 1009 .linear_ranges = wm8350_ldo_ranges, 1010 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges), 1011 .vsel_reg = WM8350_LDO1_CONTROL, 1012 .vsel_mask = WM8350_LDO1_VSEL_MASK, 1013 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 1014 .enable_mask = WM8350_LDO1_ENA, 1015 .owner = THIS_MODULE, 1016 }, 1017 { 1018 .name = "LDO2", 1019 .id = WM8350_LDO_2, 1020 .ops = &wm8350_ldo_ops, 1021 .irq = WM8350_IRQ_UV_LDO2, 1022 .type = REGULATOR_VOLTAGE, 1023 .n_voltages = WM8350_LDO2_VSEL_MASK + 1, 1024 .linear_ranges = wm8350_ldo_ranges, 1025 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges), 1026 .vsel_reg = WM8350_LDO2_CONTROL, 1027 .vsel_mask = WM8350_LDO2_VSEL_MASK, 1028 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 1029 .enable_mask = WM8350_LDO2_ENA, 1030 .owner = THIS_MODULE, 1031 }, 1032 { 1033 .name = "LDO3", 1034 .id = WM8350_LDO_3, 1035 .ops = &wm8350_ldo_ops, 1036 .irq = WM8350_IRQ_UV_LDO3, 1037 .type = REGULATOR_VOLTAGE, 1038 .n_voltages = WM8350_LDO3_VSEL_MASK + 1, 1039 .linear_ranges = wm8350_ldo_ranges, 1040 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges), 1041 .vsel_reg = WM8350_LDO3_CONTROL, 1042 .vsel_mask = WM8350_LDO3_VSEL_MASK, 1043 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 1044 .enable_mask = WM8350_LDO3_ENA, 1045 .owner = THIS_MODULE, 1046 }, 1047 { 1048 .name = "LDO4", 1049 .id = WM8350_LDO_4, 1050 .ops = &wm8350_ldo_ops, 1051 .irq = WM8350_IRQ_UV_LDO4, 1052 .type = REGULATOR_VOLTAGE, 1053 .n_voltages = WM8350_LDO4_VSEL_MASK + 1, 1054 .linear_ranges = wm8350_ldo_ranges, 1055 .n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges), 1056 .vsel_reg = WM8350_LDO4_CONTROL, 1057 .vsel_mask = WM8350_LDO4_VSEL_MASK, 1058 .enable_reg = WM8350_DCDC_LDO_REQUESTED, 1059 .enable_mask = WM8350_LDO4_ENA, 1060 .owner = THIS_MODULE, 1061 }, 1062 { 1063 .name = "ISINKA", 1064 .id = WM8350_ISINK_A, 1065 .ops = &wm8350_isink_ops, 1066 .irq = WM8350_IRQ_CS1, 1067 .type = REGULATOR_CURRENT, 1068 .owner = THIS_MODULE, 1069 .curr_table = isink_cur, 1070 .n_current_limits = ARRAY_SIZE(isink_cur), 1071 .csel_reg = WM8350_CURRENT_SINK_DRIVER_A, 1072 .csel_mask = WM8350_CS1_ISEL_MASK, 1073 }, 1074 { 1075 .name = "ISINKB", 1076 .id = WM8350_ISINK_B, 1077 .ops = &wm8350_isink_ops, 1078 .irq = WM8350_IRQ_CS2, 1079 .type = REGULATOR_CURRENT, 1080 .owner = THIS_MODULE, 1081 .curr_table = isink_cur, 1082 .n_current_limits = ARRAY_SIZE(isink_cur), 1083 .csel_reg = WM8350_CURRENT_SINK_DRIVER_B, 1084 .csel_mask = WM8350_CS2_ISEL_MASK, 1085 }, 1086 }; 1087 1088 static irqreturn_t pmic_uv_handler(int irq, void *data) 1089 { 1090 struct regulator_dev *rdev = (struct regulator_dev *)data; 1091 1092 if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2) 1093 regulator_notifier_call_chain(rdev, 1094 REGULATOR_EVENT_REGULATION_OUT, 1095 NULL); 1096 else 1097 regulator_notifier_call_chain(rdev, 1098 REGULATOR_EVENT_UNDER_VOLTAGE, 1099 NULL); 1100 1101 return IRQ_HANDLED; 1102 } 1103 1104 static int wm8350_regulator_probe(struct platform_device *pdev) 1105 { 1106 struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev); 1107 struct regulator_config config = { }; 1108 struct regulator_dev *rdev; 1109 int ret; 1110 u16 val; 1111 1112 if (pdev->id < WM8350_DCDC_1 || pdev->id > WM8350_ISINK_B) 1113 return -ENODEV; 1114 1115 /* do any regulator specific init */ 1116 switch (pdev->id) { 1117 case WM8350_DCDC_1: 1118 val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER); 1119 wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 1120 break; 1121 case WM8350_DCDC_3: 1122 val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER); 1123 wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 1124 break; 1125 case WM8350_DCDC_4: 1126 val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER); 1127 wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 1128 break; 1129 case WM8350_DCDC_6: 1130 val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER); 1131 wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; 1132 break; 1133 } 1134 1135 config.dev = &pdev->dev; 1136 config.init_data = dev_get_platdata(&pdev->dev); 1137 config.driver_data = dev_get_drvdata(&pdev->dev); 1138 config.regmap = wm8350->regmap; 1139 1140 /* register regulator */ 1141 rdev = devm_regulator_register(&pdev->dev, &wm8350_reg[pdev->id], 1142 &config); 1143 if (IS_ERR(rdev)) { 1144 dev_err(&pdev->dev, "failed to register %s\n", 1145 wm8350_reg[pdev->id].name); 1146 return PTR_ERR(rdev); 1147 } 1148 1149 /* register regulator IRQ */ 1150 ret = wm8350_register_irq(wm8350, wm8350_reg[pdev->id].irq, 1151 pmic_uv_handler, 0, "UV", rdev); 1152 if (ret < 0) { 1153 dev_err(&pdev->dev, "failed to register regulator %s IRQ\n", 1154 wm8350_reg[pdev->id].name); 1155 return ret; 1156 } 1157 1158 return 0; 1159 } 1160 1161 static int wm8350_regulator_remove(struct platform_device *pdev) 1162 { 1163 struct regulator_dev *rdev = platform_get_drvdata(pdev); 1164 struct wm8350 *wm8350 = rdev_get_drvdata(rdev); 1165 1166 wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq, rdev); 1167 1168 return 0; 1169 } 1170 1171 int wm8350_register_regulator(struct wm8350 *wm8350, int reg, 1172 struct regulator_init_data *initdata) 1173 { 1174 struct platform_device *pdev; 1175 int ret; 1176 if (reg < 0 || reg >= NUM_WM8350_REGULATORS) 1177 return -EINVAL; 1178 1179 if (wm8350->pmic.pdev[reg]) 1180 return -EBUSY; 1181 1182 if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 && 1183 reg > wm8350->pmic.max_dcdc) 1184 return -ENODEV; 1185 if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B && 1186 reg > wm8350->pmic.max_isink) 1187 return -ENODEV; 1188 1189 pdev = platform_device_alloc("wm8350-regulator", reg); 1190 if (!pdev) 1191 return -ENOMEM; 1192 1193 wm8350->pmic.pdev[reg] = pdev; 1194 1195 initdata->driver_data = wm8350; 1196 1197 pdev->dev.platform_data = initdata; 1198 pdev->dev.parent = wm8350->dev; 1199 platform_set_drvdata(pdev, wm8350); 1200 1201 ret = platform_device_add(pdev); 1202 1203 if (ret != 0) { 1204 dev_err(wm8350->dev, "Failed to register regulator %d: %d\n", 1205 reg, ret); 1206 platform_device_put(pdev); 1207 wm8350->pmic.pdev[reg] = NULL; 1208 } 1209 1210 return ret; 1211 } 1212 EXPORT_SYMBOL_GPL(wm8350_register_regulator); 1213 1214 /** 1215 * wm8350_register_led - Register a WM8350 LED output 1216 * 1217 * @wm8350: The WM8350 device to configure. 1218 * @lednum: LED device index to create. 1219 * @dcdc: The DCDC to use for the LED. 1220 * @isink: The ISINK to use for the LED. 1221 * @pdata: Configuration for the LED. 1222 * 1223 * The WM8350 supports the use of an ISINK together with a DCDC to 1224 * provide a power-efficient LED driver. This function registers the 1225 * regulators and instantiates the platform device for a LED. The 1226 * operating modes for the LED regulators must be configured using 1227 * wm8350_isink_set_flash(), wm8350_dcdc25_set_mode() and 1228 * wm8350_dcdc_set_slot() prior to calling this function. 1229 */ 1230 int wm8350_register_led(struct wm8350 *wm8350, int lednum, int dcdc, int isink, 1231 struct wm8350_led_platform_data *pdata) 1232 { 1233 struct wm8350_led *led; 1234 struct platform_device *pdev; 1235 int ret; 1236 1237 if (lednum >= ARRAY_SIZE(wm8350->pmic.led) || lednum < 0) { 1238 dev_err(wm8350->dev, "Invalid LED index %d\n", lednum); 1239 return -ENODEV; 1240 } 1241 1242 led = &wm8350->pmic.led[lednum]; 1243 1244 if (led->pdev) { 1245 dev_err(wm8350->dev, "LED %d already allocated\n", lednum); 1246 return -EINVAL; 1247 } 1248 1249 pdev = platform_device_alloc("wm8350-led", lednum); 1250 if (pdev == NULL) { 1251 dev_err(wm8350->dev, "Failed to allocate LED %d\n", lednum); 1252 return -ENOMEM; 1253 } 1254 1255 led->isink_consumer.dev_name = dev_name(&pdev->dev); 1256 led->isink_consumer.supply = "led_isink"; 1257 led->isink_init.num_consumer_supplies = 1; 1258 led->isink_init.consumer_supplies = &led->isink_consumer; 1259 led->isink_init.constraints.min_uA = 0; 1260 led->isink_init.constraints.max_uA = pdata->max_uA; 1261 led->isink_init.constraints.valid_ops_mask 1262 = REGULATOR_CHANGE_CURRENT | REGULATOR_CHANGE_STATUS; 1263 led->isink_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL; 1264 ret = wm8350_register_regulator(wm8350, isink, &led->isink_init); 1265 if (ret != 0) { 1266 platform_device_put(pdev); 1267 return ret; 1268 } 1269 1270 led->dcdc_consumer.dev_name = dev_name(&pdev->dev); 1271 led->dcdc_consumer.supply = "led_vcc"; 1272 led->dcdc_init.num_consumer_supplies = 1; 1273 led->dcdc_init.consumer_supplies = &led->dcdc_consumer; 1274 led->dcdc_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL; 1275 led->dcdc_init.constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS; 1276 ret = wm8350_register_regulator(wm8350, dcdc, &led->dcdc_init); 1277 if (ret != 0) { 1278 platform_device_put(pdev); 1279 return ret; 1280 } 1281 1282 switch (isink) { 1283 case WM8350_ISINK_A: 1284 wm8350->pmic.isink_A_dcdc = dcdc; 1285 break; 1286 case WM8350_ISINK_B: 1287 wm8350->pmic.isink_B_dcdc = dcdc; 1288 break; 1289 } 1290 1291 pdev->dev.platform_data = pdata; 1292 pdev->dev.parent = wm8350->dev; 1293 ret = platform_device_add(pdev); 1294 if (ret != 0) { 1295 dev_err(wm8350->dev, "Failed to register LED %d: %d\n", 1296 lednum, ret); 1297 platform_device_put(pdev); 1298 return ret; 1299 } 1300 1301 led->pdev = pdev; 1302 1303 return 0; 1304 } 1305 EXPORT_SYMBOL_GPL(wm8350_register_led); 1306 1307 static struct platform_driver wm8350_regulator_driver = { 1308 .probe = wm8350_regulator_probe, 1309 .remove = wm8350_regulator_remove, 1310 .driver = { 1311 .name = "wm8350-regulator", 1312 }, 1313 }; 1314 1315 static int __init wm8350_regulator_init(void) 1316 { 1317 return platform_driver_register(&wm8350_regulator_driver); 1318 } 1319 subsys_initcall(wm8350_regulator_init); 1320 1321 static void __exit wm8350_regulator_exit(void) 1322 { 1323 platform_driver_unregister(&wm8350_regulator_driver); 1324 } 1325 module_exit(wm8350_regulator_exit); 1326 1327 /* Module information */ 1328 MODULE_AUTHOR("Liam Girdwood"); 1329 MODULE_DESCRIPTION("WM8350 voltage and current regulator driver"); 1330 MODULE_LICENSE("GPL"); 1331 MODULE_ALIAS("platform:wm8350-regulator"); 1332