1 /* 2 * Driver for Regulator part of Palmas PMIC Chips 3 * 4 * Copyright 2011-2013 Texas Instruments Inc. 5 * 6 * Author: Graeme Gregory <gg@slimlogic.co.uk> 7 * Author: Ian Lartey <ian@slimlogic.co.uk> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/err.h> 20 #include <linux/platform_device.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/regulator/machine.h> 23 #include <linux/slab.h> 24 #include <linux/regmap.h> 25 #include <linux/mfd/palmas.h> 26 #include <linux/of.h> 27 #include <linux/of_platform.h> 28 #include <linux/regulator/of_regulator.h> 29 30 struct regs_info { 31 char *name; 32 char *sname; 33 u8 vsel_addr; 34 u8 ctrl_addr; 35 u8 tstep_addr; 36 }; 37 38 static const struct regs_info palmas_regs_info[] = { 39 { 40 .name = "SMPS12", 41 .sname = "smps1-in", 42 .vsel_addr = PALMAS_SMPS12_VOLTAGE, 43 .ctrl_addr = PALMAS_SMPS12_CTRL, 44 .tstep_addr = PALMAS_SMPS12_TSTEP, 45 }, 46 { 47 .name = "SMPS123", 48 .sname = "smps1-in", 49 .vsel_addr = PALMAS_SMPS12_VOLTAGE, 50 .ctrl_addr = PALMAS_SMPS12_CTRL, 51 .tstep_addr = PALMAS_SMPS12_TSTEP, 52 }, 53 { 54 .name = "SMPS3", 55 .sname = "smps3-in", 56 .vsel_addr = PALMAS_SMPS3_VOLTAGE, 57 .ctrl_addr = PALMAS_SMPS3_CTRL, 58 }, 59 { 60 .name = "SMPS45", 61 .sname = "smps4-in", 62 .vsel_addr = PALMAS_SMPS45_VOLTAGE, 63 .ctrl_addr = PALMAS_SMPS45_CTRL, 64 .tstep_addr = PALMAS_SMPS45_TSTEP, 65 }, 66 { 67 .name = "SMPS457", 68 .sname = "smps4-in", 69 .vsel_addr = PALMAS_SMPS45_VOLTAGE, 70 .ctrl_addr = PALMAS_SMPS45_CTRL, 71 .tstep_addr = PALMAS_SMPS45_TSTEP, 72 }, 73 { 74 .name = "SMPS6", 75 .sname = "smps6-in", 76 .vsel_addr = PALMAS_SMPS6_VOLTAGE, 77 .ctrl_addr = PALMAS_SMPS6_CTRL, 78 .tstep_addr = PALMAS_SMPS6_TSTEP, 79 }, 80 { 81 .name = "SMPS7", 82 .sname = "smps7-in", 83 .vsel_addr = PALMAS_SMPS7_VOLTAGE, 84 .ctrl_addr = PALMAS_SMPS7_CTRL, 85 }, 86 { 87 .name = "SMPS8", 88 .sname = "smps8-in", 89 .vsel_addr = PALMAS_SMPS8_VOLTAGE, 90 .ctrl_addr = PALMAS_SMPS8_CTRL, 91 .tstep_addr = PALMAS_SMPS8_TSTEP, 92 }, 93 { 94 .name = "SMPS9", 95 .sname = "smps9-in", 96 .vsel_addr = PALMAS_SMPS9_VOLTAGE, 97 .ctrl_addr = PALMAS_SMPS9_CTRL, 98 }, 99 { 100 .name = "SMPS10_OUT2", 101 .sname = "smps10-in", 102 .ctrl_addr = PALMAS_SMPS10_CTRL, 103 }, 104 { 105 .name = "SMPS10_OUT1", 106 .sname = "smps10-out2", 107 .ctrl_addr = PALMAS_SMPS10_CTRL, 108 }, 109 { 110 .name = "LDO1", 111 .sname = "ldo1-in", 112 .vsel_addr = PALMAS_LDO1_VOLTAGE, 113 .ctrl_addr = PALMAS_LDO1_CTRL, 114 }, 115 { 116 .name = "LDO2", 117 .sname = "ldo2-in", 118 .vsel_addr = PALMAS_LDO2_VOLTAGE, 119 .ctrl_addr = PALMAS_LDO2_CTRL, 120 }, 121 { 122 .name = "LDO3", 123 .sname = "ldo3-in", 124 .vsel_addr = PALMAS_LDO3_VOLTAGE, 125 .ctrl_addr = PALMAS_LDO3_CTRL, 126 }, 127 { 128 .name = "LDO4", 129 .sname = "ldo4-in", 130 .vsel_addr = PALMAS_LDO4_VOLTAGE, 131 .ctrl_addr = PALMAS_LDO4_CTRL, 132 }, 133 { 134 .name = "LDO5", 135 .sname = "ldo5-in", 136 .vsel_addr = PALMAS_LDO5_VOLTAGE, 137 .ctrl_addr = PALMAS_LDO5_CTRL, 138 }, 139 { 140 .name = "LDO6", 141 .sname = "ldo6-in", 142 .vsel_addr = PALMAS_LDO6_VOLTAGE, 143 .ctrl_addr = PALMAS_LDO6_CTRL, 144 }, 145 { 146 .name = "LDO7", 147 .sname = "ldo7-in", 148 .vsel_addr = PALMAS_LDO7_VOLTAGE, 149 .ctrl_addr = PALMAS_LDO7_CTRL, 150 }, 151 { 152 .name = "LDO8", 153 .sname = "ldo8-in", 154 .vsel_addr = PALMAS_LDO8_VOLTAGE, 155 .ctrl_addr = PALMAS_LDO8_CTRL, 156 }, 157 { 158 .name = "LDO9", 159 .sname = "ldo9-in", 160 .vsel_addr = PALMAS_LDO9_VOLTAGE, 161 .ctrl_addr = PALMAS_LDO9_CTRL, 162 }, 163 { 164 .name = "LDOLN", 165 .sname = "ldoln-in", 166 .vsel_addr = PALMAS_LDOLN_VOLTAGE, 167 .ctrl_addr = PALMAS_LDOLN_CTRL, 168 }, 169 { 170 .name = "LDOUSB", 171 .sname = "ldousb-in", 172 .vsel_addr = PALMAS_LDOUSB_VOLTAGE, 173 .ctrl_addr = PALMAS_LDOUSB_CTRL, 174 }, 175 { 176 .name = "REGEN1", 177 .ctrl_addr = PALMAS_REGEN1_CTRL, 178 }, 179 { 180 .name = "REGEN2", 181 .ctrl_addr = PALMAS_REGEN2_CTRL, 182 }, 183 { 184 .name = "REGEN3", 185 .ctrl_addr = PALMAS_REGEN3_CTRL, 186 }, 187 { 188 .name = "SYSEN1", 189 .ctrl_addr = PALMAS_SYSEN1_CTRL, 190 }, 191 { 192 .name = "SYSEN2", 193 .ctrl_addr = PALMAS_SYSEN2_CTRL, 194 }, 195 }; 196 197 static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500}; 198 199 #define SMPS_CTRL_MODE_OFF 0x00 200 #define SMPS_CTRL_MODE_ON 0x01 201 #define SMPS_CTRL_MODE_ECO 0x02 202 #define SMPS_CTRL_MODE_PWM 0x03 203 204 /* These values are derived from the data sheet. And are the number of steps 205 * where there is a voltage change, the ranges at beginning and end of register 206 * max/min values where there are no change are ommitted. 207 * 208 * So they are basically (maxV-minV)/stepV 209 */ 210 #define PALMAS_SMPS_NUM_VOLTAGES 117 211 #define PALMAS_SMPS10_NUM_VOLTAGES 2 212 #define PALMAS_LDO_NUM_VOLTAGES 50 213 214 #define SMPS10_VSEL (1<<3) 215 #define SMPS10_BOOST_EN (1<<2) 216 #define SMPS10_BYPASS_EN (1<<1) 217 #define SMPS10_SWITCH_EN (1<<0) 218 219 #define REGULATOR_SLAVE 0 220 221 static int palmas_smps_read(struct palmas *palmas, unsigned int reg, 222 unsigned int *dest) 223 { 224 unsigned int addr; 225 226 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); 227 228 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); 229 } 230 231 static int palmas_smps_write(struct palmas *palmas, unsigned int reg, 232 unsigned int value) 233 { 234 unsigned int addr; 235 236 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); 237 238 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); 239 } 240 241 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg, 242 unsigned int *dest) 243 { 244 unsigned int addr; 245 246 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); 247 248 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); 249 } 250 251 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg, 252 unsigned int value) 253 { 254 unsigned int addr; 255 256 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); 257 258 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); 259 } 260 261 static int palmas_is_enabled_smps(struct regulator_dev *dev) 262 { 263 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 264 int id = rdev_get_id(dev); 265 unsigned int reg; 266 267 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 268 269 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; 270 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; 271 272 return !!(reg); 273 } 274 275 static int palmas_enable_smps(struct regulator_dev *dev) 276 { 277 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 278 int id = rdev_get_id(dev); 279 unsigned int reg; 280 281 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 282 283 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 284 if (pmic->current_reg_mode[id]) 285 reg |= pmic->current_reg_mode[id]; 286 else 287 reg |= SMPS_CTRL_MODE_ON; 288 289 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); 290 291 return 0; 292 } 293 294 static int palmas_disable_smps(struct regulator_dev *dev) 295 { 296 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 297 int id = rdev_get_id(dev); 298 unsigned int reg; 299 300 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 301 302 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 303 304 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); 305 306 return 0; 307 } 308 309 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode) 310 { 311 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 312 int id = rdev_get_id(dev); 313 unsigned int reg; 314 bool rail_enable = true; 315 316 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 317 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 318 319 if (reg == SMPS_CTRL_MODE_OFF) 320 rail_enable = false; 321 322 switch (mode) { 323 case REGULATOR_MODE_NORMAL: 324 reg |= SMPS_CTRL_MODE_ON; 325 break; 326 case REGULATOR_MODE_IDLE: 327 reg |= SMPS_CTRL_MODE_ECO; 328 break; 329 case REGULATOR_MODE_FAST: 330 reg |= SMPS_CTRL_MODE_PWM; 331 break; 332 default: 333 return -EINVAL; 334 } 335 336 pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 337 if (rail_enable) 338 palmas_smps_write(pmic->palmas, 339 palmas_regs_info[id].ctrl_addr, reg); 340 return 0; 341 } 342 343 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev) 344 { 345 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 346 int id = rdev_get_id(dev); 347 unsigned int reg; 348 349 reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 350 351 switch (reg) { 352 case SMPS_CTRL_MODE_ON: 353 return REGULATOR_MODE_NORMAL; 354 case SMPS_CTRL_MODE_ECO: 355 return REGULATOR_MODE_IDLE; 356 case SMPS_CTRL_MODE_PWM: 357 return REGULATOR_MODE_FAST; 358 } 359 360 return 0; 361 } 362 363 static int palmas_list_voltage_smps(struct regulator_dev *dev, 364 unsigned selector) 365 { 366 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 367 int id = rdev_get_id(dev); 368 int mult = 1; 369 370 /* Read the multiplier set in VSEL register to return 371 * the correct voltage. 372 */ 373 if (pmic->range[id]) 374 mult = 2; 375 376 if (selector == 0) 377 return 0; 378 else if (selector < 6) 379 return 500000 * mult; 380 else 381 /* Voltage is linear mapping starting from selector 6, 382 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE 383 * RANGE is either x1 or x2 384 */ 385 return (490000 + ((selector - 5) * 10000)) * mult; 386 } 387 388 static int palmas_map_voltage_smps(struct regulator_dev *rdev, 389 int min_uV, int max_uV) 390 { 391 struct palmas_pmic *pmic = rdev_get_drvdata(rdev); 392 int id = rdev_get_id(rdev); 393 int ret, voltage; 394 395 if (min_uV == 0) 396 return 0; 397 398 if (pmic->range[id]) { /* RANGE is x2 */ 399 if (min_uV < 1000000) 400 min_uV = 1000000; 401 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6; 402 } else { /* RANGE is x1 */ 403 if (min_uV < 500000) 404 min_uV = 500000; 405 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6; 406 } 407 408 /* Map back into a voltage to verify we're still in bounds */ 409 voltage = palmas_list_voltage_smps(rdev, ret); 410 if (voltage < min_uV || voltage > max_uV) 411 return -EINVAL; 412 413 return ret; 414 } 415 416 static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev, 417 unsigned int old_selector, unsigned int new_selector) 418 { 419 struct palmas_pmic *pmic = rdev_get_drvdata(rdev); 420 int id = rdev_get_id(rdev); 421 int old_uv, new_uv; 422 unsigned int ramp_delay = pmic->ramp_delay[id]; 423 424 if (!ramp_delay) 425 return 0; 426 427 old_uv = palmas_list_voltage_smps(rdev, old_selector); 428 if (old_uv < 0) 429 return old_uv; 430 431 new_uv = palmas_list_voltage_smps(rdev, new_selector); 432 if (new_uv < 0) 433 return new_uv; 434 435 return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay); 436 } 437 438 static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev, 439 int ramp_delay) 440 { 441 struct palmas_pmic *pmic = rdev_get_drvdata(rdev); 442 int id = rdev_get_id(rdev); 443 unsigned int reg = 0; 444 unsigned int addr = palmas_regs_info[id].tstep_addr; 445 int ret; 446 447 /* SMPS3 and SMPS7 do not have tstep_addr setting */ 448 switch (id) { 449 case PALMAS_REG_SMPS3: 450 case PALMAS_REG_SMPS7: 451 return 0; 452 } 453 454 if (ramp_delay <= 0) 455 reg = 0; 456 else if (ramp_delay <= 2500) 457 reg = 3; 458 else if (ramp_delay <= 5000) 459 reg = 2; 460 else 461 reg = 1; 462 463 ret = palmas_smps_write(pmic->palmas, addr, reg); 464 if (ret < 0) { 465 dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret); 466 return ret; 467 } 468 469 pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg]; 470 return ret; 471 } 472 473 static struct regulator_ops palmas_ops_smps = { 474 .is_enabled = palmas_is_enabled_smps, 475 .enable = palmas_enable_smps, 476 .disable = palmas_disable_smps, 477 .set_mode = palmas_set_mode_smps, 478 .get_mode = palmas_get_mode_smps, 479 .get_voltage_sel = regulator_get_voltage_sel_regmap, 480 .set_voltage_sel = regulator_set_voltage_sel_regmap, 481 .list_voltage = palmas_list_voltage_smps, 482 .map_voltage = palmas_map_voltage_smps, 483 .set_voltage_time_sel = palma_smps_set_voltage_smps_time_sel, 484 .set_ramp_delay = palmas_smps_set_ramp_delay, 485 }; 486 487 static struct regulator_ops palmas_ops_smps10 = { 488 .is_enabled = regulator_is_enabled_regmap, 489 .enable = regulator_enable_regmap, 490 .disable = regulator_disable_regmap, 491 .get_voltage_sel = regulator_get_voltage_sel_regmap, 492 .set_voltage_sel = regulator_set_voltage_sel_regmap, 493 .list_voltage = regulator_list_voltage_linear, 494 .map_voltage = regulator_map_voltage_linear, 495 .set_bypass = regulator_set_bypass_regmap, 496 .get_bypass = regulator_get_bypass_regmap, 497 }; 498 499 static int palmas_is_enabled_ldo(struct regulator_dev *dev) 500 { 501 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 502 int id = rdev_get_id(dev); 503 unsigned int reg; 504 505 palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 506 507 reg &= PALMAS_LDO1_CTRL_STATUS; 508 509 return !!(reg); 510 } 511 512 static struct regulator_ops palmas_ops_ldo = { 513 .is_enabled = palmas_is_enabled_ldo, 514 .enable = regulator_enable_regmap, 515 .disable = regulator_disable_regmap, 516 .get_voltage_sel = regulator_get_voltage_sel_regmap, 517 .set_voltage_sel = regulator_set_voltage_sel_regmap, 518 .list_voltage = regulator_list_voltage_linear, 519 .map_voltage = regulator_map_voltage_linear, 520 }; 521 522 static struct regulator_ops palmas_ops_extreg = { 523 .is_enabled = regulator_is_enabled_regmap, 524 .enable = regulator_enable_regmap, 525 .disable = regulator_disable_regmap, 526 }; 527 528 /* 529 * setup the hardware based sleep configuration of the SMPS/LDO regulators 530 * from the platform data. This is different to the software based control 531 * supported by the regulator framework as it is controlled by toggling 532 * pins on the PMIC such as PREQ, SYSEN, ... 533 */ 534 static int palmas_smps_init(struct palmas *palmas, int id, 535 struct palmas_reg_init *reg_init) 536 { 537 unsigned int reg; 538 unsigned int addr; 539 int ret; 540 541 addr = palmas_regs_info[id].ctrl_addr; 542 543 ret = palmas_smps_read(palmas, addr, ®); 544 if (ret) 545 return ret; 546 547 switch (id) { 548 case PALMAS_REG_SMPS10_OUT1: 549 case PALMAS_REG_SMPS10_OUT2: 550 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK; 551 if (reg_init->mode_sleep) 552 reg |= reg_init->mode_sleep << 553 PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT; 554 break; 555 default: 556 if (reg_init->warm_reset) 557 reg |= PALMAS_SMPS12_CTRL_WR_S; 558 else 559 reg &= ~PALMAS_SMPS12_CTRL_WR_S; 560 561 if (reg_init->roof_floor) 562 reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; 563 else 564 reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; 565 566 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK; 567 if (reg_init->mode_sleep) 568 reg |= reg_init->mode_sleep << 569 PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT; 570 } 571 572 ret = palmas_smps_write(palmas, addr, reg); 573 if (ret) 574 return ret; 575 576 if (palmas_regs_info[id].vsel_addr && reg_init->vsel) { 577 addr = palmas_regs_info[id].vsel_addr; 578 579 reg = reg_init->vsel; 580 581 ret = palmas_smps_write(palmas, addr, reg); 582 if (ret) 583 return ret; 584 } 585 586 587 return 0; 588 } 589 590 static int palmas_ldo_init(struct palmas *palmas, int id, 591 struct palmas_reg_init *reg_init) 592 { 593 unsigned int reg; 594 unsigned int addr; 595 int ret; 596 597 addr = palmas_regs_info[id].ctrl_addr; 598 599 ret = palmas_ldo_read(palmas, addr, ®); 600 if (ret) 601 return ret; 602 603 if (reg_init->warm_reset) 604 reg |= PALMAS_LDO1_CTRL_WR_S; 605 else 606 reg &= ~PALMAS_LDO1_CTRL_WR_S; 607 608 if (reg_init->mode_sleep) 609 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP; 610 else 611 reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP; 612 613 ret = palmas_ldo_write(palmas, addr, reg); 614 if (ret) 615 return ret; 616 617 return 0; 618 } 619 620 static int palmas_extreg_init(struct palmas *palmas, int id, 621 struct palmas_reg_init *reg_init) 622 { 623 unsigned int addr; 624 int ret; 625 unsigned int val = 0; 626 627 addr = palmas_regs_info[id].ctrl_addr; 628 629 if (reg_init->mode_sleep) 630 val = PALMAS_REGEN1_CTRL_MODE_SLEEP; 631 632 ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE, 633 addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val); 634 if (ret < 0) { 635 dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n", 636 addr, ret); 637 return ret; 638 } 639 return 0; 640 } 641 642 static void palmas_enable_ldo8_track(struct palmas *palmas) 643 { 644 unsigned int reg; 645 unsigned int addr; 646 int ret; 647 648 addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr; 649 650 ret = palmas_ldo_read(palmas, addr, ®); 651 if (ret) { 652 dev_err(palmas->dev, "Error in reading ldo8 control reg\n"); 653 return; 654 } 655 656 reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN; 657 ret = palmas_ldo_write(palmas, addr, reg); 658 if (ret < 0) { 659 dev_err(palmas->dev, "Error in enabling tracking mode\n"); 660 return; 661 } 662 /* 663 * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8 664 * output is defined by the LDO8_VOLTAGE.VSEL register divided by two, 665 * and can be set from 0.45 to 1.65 V. 666 */ 667 addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr; 668 ret = palmas_ldo_read(palmas, addr, ®); 669 if (ret) { 670 dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n"); 671 return; 672 } 673 674 reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK; 675 ret = palmas_ldo_write(palmas, addr, reg); 676 if (ret < 0) 677 dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n"); 678 679 return; 680 } 681 682 static struct of_regulator_match palmas_matches[] = { 683 { .name = "smps12", }, 684 { .name = "smps123", }, 685 { .name = "smps3", }, 686 { .name = "smps45", }, 687 { .name = "smps457", }, 688 { .name = "smps6", }, 689 { .name = "smps7", }, 690 { .name = "smps8", }, 691 { .name = "smps9", }, 692 { .name = "smps10_out2", }, 693 { .name = "smps10_out1", }, 694 { .name = "ldo1", }, 695 { .name = "ldo2", }, 696 { .name = "ldo3", }, 697 { .name = "ldo4", }, 698 { .name = "ldo5", }, 699 { .name = "ldo6", }, 700 { .name = "ldo7", }, 701 { .name = "ldo8", }, 702 { .name = "ldo9", }, 703 { .name = "ldoln", }, 704 { .name = "ldousb", }, 705 { .name = "regen1", }, 706 { .name = "regen2", }, 707 { .name = "regen3", }, 708 { .name = "sysen1", }, 709 { .name = "sysen2", }, 710 }; 711 712 static void palmas_dt_to_pdata(struct device *dev, 713 struct device_node *node, 714 struct palmas_pmic_platform_data *pdata) 715 { 716 struct device_node *regulators; 717 u32 prop; 718 int idx, ret; 719 720 node = of_node_get(node); 721 regulators = of_find_node_by_name(node, "regulators"); 722 if (!regulators) { 723 dev_info(dev, "regulator node not found\n"); 724 return; 725 } 726 727 ret = of_regulator_match(dev, regulators, palmas_matches, 728 PALMAS_NUM_REGS); 729 of_node_put(regulators); 730 if (ret < 0) { 731 dev_err(dev, "Error parsing regulator init data: %d\n", ret); 732 return; 733 } 734 735 for (idx = 0; idx < PALMAS_NUM_REGS; idx++) { 736 if (!palmas_matches[idx].init_data || 737 !palmas_matches[idx].of_node) 738 continue; 739 740 pdata->reg_data[idx] = palmas_matches[idx].init_data; 741 742 pdata->reg_init[idx] = devm_kzalloc(dev, 743 sizeof(struct palmas_reg_init), GFP_KERNEL); 744 745 pdata->reg_init[idx]->warm_reset = 746 of_property_read_bool(palmas_matches[idx].of_node, 747 "ti,warm-reset"); 748 749 pdata->reg_init[idx]->roof_floor = 750 of_property_read_bool(palmas_matches[idx].of_node, 751 "ti,roof-floor"); 752 753 ret = of_property_read_u32(palmas_matches[idx].of_node, 754 "ti,mode-sleep", &prop); 755 if (!ret) 756 pdata->reg_init[idx]->mode_sleep = prop; 757 758 ret = of_property_read_bool(palmas_matches[idx].of_node, 759 "ti,smps-range"); 760 if (ret) 761 pdata->reg_init[idx]->vsel = 762 PALMAS_SMPS12_VOLTAGE_RANGE; 763 764 if (idx == PALMAS_REG_LDO8) 765 pdata->enable_ldo8_tracking = of_property_read_bool( 766 palmas_matches[idx].of_node, 767 "ti,enable-ldo8-tracking"); 768 } 769 770 pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator"); 771 } 772 773 774 static int palmas_regulators_probe(struct platform_device *pdev) 775 { 776 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); 777 struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data; 778 struct device_node *node = pdev->dev.of_node; 779 struct regulator_dev *rdev; 780 struct regulator_config config = { }; 781 struct palmas_pmic *pmic; 782 struct palmas_reg_init *reg_init; 783 int id = 0, ret; 784 unsigned int addr, reg; 785 786 if (node && !pdata) { 787 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 788 789 if (!pdata) 790 return -ENOMEM; 791 792 palmas_dt_to_pdata(&pdev->dev, node, pdata); 793 } 794 795 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); 796 if (!pmic) 797 return -ENOMEM; 798 799 pmic->dev = &pdev->dev; 800 pmic->palmas = palmas; 801 palmas->pmic = pmic; 802 platform_set_drvdata(pdev, pmic); 803 804 ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®); 805 if (ret) 806 return ret; 807 808 if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN) 809 pmic->smps123 = 1; 810 811 if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN) 812 pmic->smps457 = 1; 813 814 config.regmap = palmas->regmap[REGULATOR_SLAVE]; 815 config.dev = &pdev->dev; 816 config.driver_data = pmic; 817 818 for (id = 0; id < PALMAS_REG_LDO1; id++) { 819 bool ramp_delay_support = false; 820 821 /* 822 * Miss out regulators which are not available due 823 * to slaving configurations. 824 */ 825 switch (id) { 826 case PALMAS_REG_SMPS12: 827 case PALMAS_REG_SMPS3: 828 if (pmic->smps123) 829 continue; 830 if (id == PALMAS_REG_SMPS12) 831 ramp_delay_support = true; 832 break; 833 case PALMAS_REG_SMPS123: 834 if (!pmic->smps123) 835 continue; 836 ramp_delay_support = true; 837 break; 838 case PALMAS_REG_SMPS45: 839 case PALMAS_REG_SMPS7: 840 if (pmic->smps457) 841 continue; 842 if (id == PALMAS_REG_SMPS45) 843 ramp_delay_support = true; 844 break; 845 case PALMAS_REG_SMPS457: 846 if (!pmic->smps457) 847 continue; 848 ramp_delay_support = true; 849 break; 850 case PALMAS_REG_SMPS10_OUT1: 851 case PALMAS_REG_SMPS10_OUT2: 852 if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST)) 853 continue; 854 } 855 856 if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8)) 857 ramp_delay_support = true; 858 859 if (ramp_delay_support) { 860 addr = palmas_regs_info[id].tstep_addr; 861 ret = palmas_smps_read(pmic->palmas, addr, ®); 862 if (ret < 0) { 863 dev_err(&pdev->dev, 864 "reading TSTEP reg failed: %d\n", ret); 865 goto err_unregister_regulator; 866 } 867 pmic->desc[id].ramp_delay = 868 palmas_smps_ramp_delay[reg & 0x3]; 869 pmic->ramp_delay[id] = pmic->desc[id].ramp_delay; 870 } 871 872 /* Initialise sleep/init values from platform data */ 873 if (pdata && pdata->reg_init[id]) { 874 reg_init = pdata->reg_init[id]; 875 ret = palmas_smps_init(palmas, id, reg_init); 876 if (ret) 877 goto err_unregister_regulator; 878 } 879 880 /* Register the regulators */ 881 pmic->desc[id].name = palmas_regs_info[id].name; 882 pmic->desc[id].id = id; 883 884 switch (id) { 885 case PALMAS_REG_SMPS10_OUT1: 886 case PALMAS_REG_SMPS10_OUT2: 887 pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES; 888 pmic->desc[id].ops = &palmas_ops_smps10; 889 pmic->desc[id].vsel_reg = 890 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 891 PALMAS_SMPS10_CTRL); 892 pmic->desc[id].vsel_mask = SMPS10_VSEL; 893 pmic->desc[id].enable_reg = 894 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 895 PALMAS_SMPS10_CTRL); 896 if (id == PALMAS_REG_SMPS10_OUT1) 897 pmic->desc[id].enable_mask = SMPS10_SWITCH_EN; 898 else 899 pmic->desc[id].enable_mask = SMPS10_BOOST_EN; 900 pmic->desc[id].bypass_reg = 901 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 902 PALMAS_SMPS10_CTRL); 903 pmic->desc[id].bypass_mask = SMPS10_BYPASS_EN; 904 pmic->desc[id].min_uV = 3750000; 905 pmic->desc[id].uV_step = 1250000; 906 break; 907 default: 908 /* 909 * Read and store the RANGE bit for later use 910 * This must be done before regulator is probed, 911 * otherwise we error in probe with unsupportable 912 * ranges. Read the current smps mode for later use. 913 */ 914 addr = palmas_regs_info[id].vsel_addr; 915 916 ret = palmas_smps_read(pmic->palmas, addr, ®); 917 if (ret) 918 goto err_unregister_regulator; 919 if (reg & PALMAS_SMPS12_VOLTAGE_RANGE) 920 pmic->range[id] = 1; 921 922 pmic->desc[id].ops = &palmas_ops_smps; 923 pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES; 924 pmic->desc[id].vsel_reg = 925 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 926 palmas_regs_info[id].vsel_addr); 927 pmic->desc[id].vsel_mask = 928 PALMAS_SMPS12_VOLTAGE_VSEL_MASK; 929 930 /* Read the smps mode for later use. */ 931 addr = palmas_regs_info[id].ctrl_addr; 932 ret = palmas_smps_read(pmic->palmas, addr, ®); 933 if (ret) 934 goto err_unregister_regulator; 935 pmic->current_reg_mode[id] = reg & 936 PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 937 } 938 939 pmic->desc[id].type = REGULATOR_VOLTAGE; 940 pmic->desc[id].owner = THIS_MODULE; 941 942 if (pdata) 943 config.init_data = pdata->reg_data[id]; 944 else 945 config.init_data = NULL; 946 947 pmic->desc[id].supply_name = palmas_regs_info[id].sname; 948 config.of_node = palmas_matches[id].of_node; 949 950 rdev = regulator_register(&pmic->desc[id], &config); 951 if (IS_ERR(rdev)) { 952 dev_err(&pdev->dev, 953 "failed to register %s regulator\n", 954 pdev->name); 955 ret = PTR_ERR(rdev); 956 goto err_unregister_regulator; 957 } 958 959 /* Save regulator for cleanup */ 960 pmic->rdev[id] = rdev; 961 } 962 963 /* Start this loop from the id left from previous loop */ 964 for (; id < PALMAS_NUM_REGS; id++) { 965 966 /* Miss out regulators which are not available due 967 * to alternate functions. 968 */ 969 970 /* Register the regulators */ 971 pmic->desc[id].name = palmas_regs_info[id].name; 972 pmic->desc[id].id = id; 973 pmic->desc[id].type = REGULATOR_VOLTAGE; 974 pmic->desc[id].owner = THIS_MODULE; 975 976 if (id < PALMAS_REG_REGEN1) { 977 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES; 978 pmic->desc[id].ops = &palmas_ops_ldo; 979 pmic->desc[id].min_uV = 900000; 980 pmic->desc[id].uV_step = 50000; 981 pmic->desc[id].linear_min_sel = 1; 982 pmic->desc[id].vsel_reg = 983 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, 984 palmas_regs_info[id].vsel_addr); 985 pmic->desc[id].vsel_mask = 986 PALMAS_LDO1_VOLTAGE_VSEL_MASK; 987 pmic->desc[id].enable_reg = 988 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, 989 palmas_regs_info[id].ctrl_addr); 990 pmic->desc[id].enable_mask = 991 PALMAS_LDO1_CTRL_MODE_ACTIVE; 992 993 /* Check if LDO8 is in tracking mode or not */ 994 if (pdata && (id == PALMAS_REG_LDO8) && 995 pdata->enable_ldo8_tracking) { 996 palmas_enable_ldo8_track(palmas); 997 pmic->desc[id].min_uV = 450000; 998 pmic->desc[id].uV_step = 25000; 999 } 1000 } else { 1001 pmic->desc[id].n_voltages = 1; 1002 pmic->desc[id].ops = &palmas_ops_extreg; 1003 pmic->desc[id].enable_reg = 1004 PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE, 1005 palmas_regs_info[id].ctrl_addr); 1006 pmic->desc[id].enable_mask = 1007 PALMAS_REGEN1_CTRL_MODE_ACTIVE; 1008 } 1009 1010 if (pdata) 1011 config.init_data = pdata->reg_data[id]; 1012 else 1013 config.init_data = NULL; 1014 1015 pmic->desc[id].supply_name = palmas_regs_info[id].sname; 1016 config.of_node = palmas_matches[id].of_node; 1017 1018 rdev = regulator_register(&pmic->desc[id], &config); 1019 if (IS_ERR(rdev)) { 1020 dev_err(&pdev->dev, 1021 "failed to register %s regulator\n", 1022 pdev->name); 1023 ret = PTR_ERR(rdev); 1024 goto err_unregister_regulator; 1025 } 1026 1027 /* Save regulator for cleanup */ 1028 pmic->rdev[id] = rdev; 1029 1030 /* Initialise sleep/init values from platform data */ 1031 if (pdata) { 1032 reg_init = pdata->reg_init[id]; 1033 if (reg_init) { 1034 if (id < PALMAS_REG_REGEN1) 1035 ret = palmas_ldo_init(palmas, 1036 id, reg_init); 1037 else 1038 ret = palmas_extreg_init(palmas, 1039 id, reg_init); 1040 if (ret) { 1041 regulator_unregister(pmic->rdev[id]); 1042 goto err_unregister_regulator; 1043 } 1044 } 1045 } 1046 } 1047 1048 1049 return 0; 1050 1051 err_unregister_regulator: 1052 while (--id >= 0) 1053 regulator_unregister(pmic->rdev[id]); 1054 return ret; 1055 } 1056 1057 static int palmas_regulators_remove(struct platform_device *pdev) 1058 { 1059 struct palmas_pmic *pmic = platform_get_drvdata(pdev); 1060 int id; 1061 1062 for (id = 0; id < PALMAS_NUM_REGS; id++) 1063 regulator_unregister(pmic->rdev[id]); 1064 return 0; 1065 } 1066 1067 static struct of_device_id of_palmas_match_tbl[] = { 1068 { .compatible = "ti,palmas-pmic", }, 1069 { .compatible = "ti,twl6035-pmic", }, 1070 { .compatible = "ti,twl6036-pmic", }, 1071 { .compatible = "ti,twl6037-pmic", }, 1072 { .compatible = "ti,tps65913-pmic", }, 1073 { .compatible = "ti,tps65914-pmic", }, 1074 { .compatible = "ti,tps80036-pmic", }, 1075 { .compatible = "ti,tps659038-pmic", }, 1076 { /* end */ } 1077 }; 1078 1079 static struct platform_driver palmas_driver = { 1080 .driver = { 1081 .name = "palmas-pmic", 1082 .of_match_table = of_palmas_match_tbl, 1083 .owner = THIS_MODULE, 1084 }, 1085 .probe = palmas_regulators_probe, 1086 .remove = palmas_regulators_remove, 1087 }; 1088 1089 static int __init palmas_init(void) 1090 { 1091 return platform_driver_register(&palmas_driver); 1092 } 1093 subsys_initcall(palmas_init); 1094 1095 static void __exit palmas_exit(void) 1096 { 1097 platform_driver_unregister(&palmas_driver); 1098 } 1099 module_exit(palmas_exit); 1100 1101 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); 1102 MODULE_DESCRIPTION("Palmas voltage regulator driver"); 1103 MODULE_LICENSE("GPL"); 1104 MODULE_ALIAS("platform:palmas-pmic"); 1105 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl); 1106