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 #define PALMAS_SMPS_NUM_VOLTAGES 122 205 #define PALMAS_SMPS10_NUM_VOLTAGES 2 206 #define PALMAS_LDO_NUM_VOLTAGES 50 207 208 #define SMPS10_VSEL (1<<3) 209 #define SMPS10_BOOST_EN (1<<2) 210 #define SMPS10_BYPASS_EN (1<<1) 211 #define SMPS10_SWITCH_EN (1<<0) 212 213 #define REGULATOR_SLAVE 0 214 215 static int palmas_smps_read(struct palmas *palmas, unsigned int reg, 216 unsigned int *dest) 217 { 218 unsigned int addr; 219 220 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); 221 222 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); 223 } 224 225 static int palmas_smps_write(struct palmas *palmas, unsigned int reg, 226 unsigned int value) 227 { 228 unsigned int addr; 229 230 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); 231 232 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); 233 } 234 235 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg, 236 unsigned int *dest) 237 { 238 unsigned int addr; 239 240 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); 241 242 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); 243 } 244 245 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg, 246 unsigned int value) 247 { 248 unsigned int addr; 249 250 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); 251 252 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); 253 } 254 255 static int palmas_is_enabled_smps(struct regulator_dev *dev) 256 { 257 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 258 int id = rdev_get_id(dev); 259 unsigned int reg; 260 261 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 262 263 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; 264 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; 265 266 return !!(reg); 267 } 268 269 static int palmas_enable_smps(struct regulator_dev *dev) 270 { 271 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 272 int id = rdev_get_id(dev); 273 unsigned int reg; 274 275 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 276 277 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 278 if (pmic->current_reg_mode[id]) 279 reg |= pmic->current_reg_mode[id]; 280 else 281 reg |= SMPS_CTRL_MODE_ON; 282 283 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); 284 285 return 0; 286 } 287 288 static int palmas_disable_smps(struct regulator_dev *dev) 289 { 290 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 291 int id = rdev_get_id(dev); 292 unsigned int reg; 293 294 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 295 296 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 297 298 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); 299 300 return 0; 301 } 302 303 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode) 304 { 305 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 306 int id = rdev_get_id(dev); 307 unsigned int reg; 308 bool rail_enable = true; 309 310 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 311 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 312 313 if (reg == SMPS_CTRL_MODE_OFF) 314 rail_enable = false; 315 316 switch (mode) { 317 case REGULATOR_MODE_NORMAL: 318 reg |= SMPS_CTRL_MODE_ON; 319 break; 320 case REGULATOR_MODE_IDLE: 321 reg |= SMPS_CTRL_MODE_ECO; 322 break; 323 case REGULATOR_MODE_FAST: 324 reg |= SMPS_CTRL_MODE_PWM; 325 break; 326 default: 327 return -EINVAL; 328 } 329 330 pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 331 if (rail_enable) 332 palmas_smps_write(pmic->palmas, 333 palmas_regs_info[id].ctrl_addr, reg); 334 return 0; 335 } 336 337 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev) 338 { 339 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 340 int id = rdev_get_id(dev); 341 unsigned int reg; 342 343 reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 344 345 switch (reg) { 346 case SMPS_CTRL_MODE_ON: 347 return REGULATOR_MODE_NORMAL; 348 case SMPS_CTRL_MODE_ECO: 349 return REGULATOR_MODE_IDLE; 350 case SMPS_CTRL_MODE_PWM: 351 return REGULATOR_MODE_FAST; 352 } 353 354 return 0; 355 } 356 357 static int palmas_list_voltage_smps(struct regulator_dev *dev, 358 unsigned selector) 359 { 360 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 361 int id = rdev_get_id(dev); 362 int mult = 1; 363 364 /* Read the multiplier set in VSEL register to return 365 * the correct voltage. 366 */ 367 if (pmic->range[id]) 368 mult = 2; 369 370 if (selector == 0) 371 return 0; 372 else if (selector < 6) 373 return 500000 * mult; 374 else 375 /* Voltage is linear mapping starting from selector 6, 376 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE 377 * RANGE is either x1 or x2 378 */ 379 return (490000 + ((selector - 5) * 10000)) * mult; 380 } 381 382 static int palmas_map_voltage_smps(struct regulator_dev *rdev, 383 int min_uV, int max_uV) 384 { 385 struct palmas_pmic *pmic = rdev_get_drvdata(rdev); 386 int id = rdev_get_id(rdev); 387 int ret, voltage; 388 389 if (min_uV == 0) 390 return 0; 391 392 if (pmic->range[id]) { /* RANGE is x2 */ 393 if (min_uV < 1000000) 394 min_uV = 1000000; 395 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6; 396 } else { /* RANGE is x1 */ 397 if (min_uV < 500000) 398 min_uV = 500000; 399 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6; 400 } 401 402 /* Map back into a voltage to verify we're still in bounds */ 403 voltage = palmas_list_voltage_smps(rdev, ret); 404 if (voltage < min_uV || voltage > max_uV) 405 return -EINVAL; 406 407 return ret; 408 } 409 410 static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev, 411 unsigned int old_selector, unsigned int new_selector) 412 { 413 struct palmas_pmic *pmic = rdev_get_drvdata(rdev); 414 int id = rdev_get_id(rdev); 415 int old_uv, new_uv; 416 unsigned int ramp_delay = pmic->ramp_delay[id]; 417 418 if (!ramp_delay) 419 return 0; 420 421 old_uv = palmas_list_voltage_smps(rdev, old_selector); 422 if (old_uv < 0) 423 return old_uv; 424 425 new_uv = palmas_list_voltage_smps(rdev, new_selector); 426 if (new_uv < 0) 427 return new_uv; 428 429 return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay); 430 } 431 432 static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev, 433 int ramp_delay) 434 { 435 struct palmas_pmic *pmic = rdev_get_drvdata(rdev); 436 int id = rdev_get_id(rdev); 437 unsigned int reg = 0; 438 unsigned int addr = palmas_regs_info[id].tstep_addr; 439 int ret; 440 441 /* SMPS3 and SMPS7 do not have tstep_addr setting */ 442 switch (id) { 443 case PALMAS_REG_SMPS3: 444 case PALMAS_REG_SMPS7: 445 return 0; 446 } 447 448 if (ramp_delay <= 0) 449 reg = 0; 450 else if (ramp_delay <= 2500) 451 reg = 3; 452 else if (ramp_delay <= 5000) 453 reg = 2; 454 else 455 reg = 1; 456 457 ret = palmas_smps_write(pmic->palmas, addr, reg); 458 if (ret < 0) { 459 dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret); 460 return ret; 461 } 462 463 pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg]; 464 return ret; 465 } 466 467 static struct regulator_ops palmas_ops_smps = { 468 .is_enabled = palmas_is_enabled_smps, 469 .enable = palmas_enable_smps, 470 .disable = palmas_disable_smps, 471 .set_mode = palmas_set_mode_smps, 472 .get_mode = palmas_get_mode_smps, 473 .get_voltage_sel = regulator_get_voltage_sel_regmap, 474 .set_voltage_sel = regulator_set_voltage_sel_regmap, 475 .list_voltage = palmas_list_voltage_smps, 476 .map_voltage = palmas_map_voltage_smps, 477 .set_voltage_time_sel = palma_smps_set_voltage_smps_time_sel, 478 .set_ramp_delay = palmas_smps_set_ramp_delay, 479 }; 480 481 static struct regulator_ops palmas_ops_smps10 = { 482 .is_enabled = regulator_is_enabled_regmap, 483 .enable = regulator_enable_regmap, 484 .disable = regulator_disable_regmap, 485 .get_voltage_sel = regulator_get_voltage_sel_regmap, 486 .set_voltage_sel = regulator_set_voltage_sel_regmap, 487 .list_voltage = regulator_list_voltage_linear, 488 .map_voltage = regulator_map_voltage_linear, 489 .set_bypass = regulator_set_bypass_regmap, 490 .get_bypass = regulator_get_bypass_regmap, 491 }; 492 493 static int palmas_is_enabled_ldo(struct regulator_dev *dev) 494 { 495 struct palmas_pmic *pmic = rdev_get_drvdata(dev); 496 int id = rdev_get_id(dev); 497 unsigned int reg; 498 499 palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); 500 501 reg &= PALMAS_LDO1_CTRL_STATUS; 502 503 return !!(reg); 504 } 505 506 static struct regulator_ops palmas_ops_ldo = { 507 .is_enabled = palmas_is_enabled_ldo, 508 .enable = regulator_enable_regmap, 509 .disable = regulator_disable_regmap, 510 .get_voltage_sel = regulator_get_voltage_sel_regmap, 511 .set_voltage_sel = regulator_set_voltage_sel_regmap, 512 .list_voltage = regulator_list_voltage_linear, 513 .map_voltage = regulator_map_voltage_linear, 514 }; 515 516 static struct regulator_ops palmas_ops_extreg = { 517 .is_enabled = regulator_is_enabled_regmap, 518 .enable = regulator_enable_regmap, 519 .disable = regulator_disable_regmap, 520 }; 521 522 /* 523 * setup the hardware based sleep configuration of the SMPS/LDO regulators 524 * from the platform data. This is different to the software based control 525 * supported by the regulator framework as it is controlled by toggling 526 * pins on the PMIC such as PREQ, SYSEN, ... 527 */ 528 static int palmas_smps_init(struct palmas *palmas, int id, 529 struct palmas_reg_init *reg_init) 530 { 531 unsigned int reg; 532 unsigned int addr; 533 int ret; 534 535 addr = palmas_regs_info[id].ctrl_addr; 536 537 ret = palmas_smps_read(palmas, addr, ®); 538 if (ret) 539 return ret; 540 541 switch (id) { 542 case PALMAS_REG_SMPS10_OUT1: 543 case PALMAS_REG_SMPS10_OUT2: 544 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK; 545 if (reg_init->mode_sleep) 546 reg |= reg_init->mode_sleep << 547 PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT; 548 break; 549 default: 550 if (reg_init->warm_reset) 551 reg |= PALMAS_SMPS12_CTRL_WR_S; 552 else 553 reg &= ~PALMAS_SMPS12_CTRL_WR_S; 554 555 if (reg_init->roof_floor) 556 reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; 557 else 558 reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; 559 560 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK; 561 if (reg_init->mode_sleep) 562 reg |= reg_init->mode_sleep << 563 PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT; 564 } 565 566 ret = palmas_smps_write(palmas, addr, reg); 567 if (ret) 568 return ret; 569 570 if (palmas_regs_info[id].vsel_addr && reg_init->vsel) { 571 addr = palmas_regs_info[id].vsel_addr; 572 573 reg = reg_init->vsel; 574 575 ret = palmas_smps_write(palmas, addr, reg); 576 if (ret) 577 return ret; 578 } 579 580 581 return 0; 582 } 583 584 static int palmas_ldo_init(struct palmas *palmas, int id, 585 struct palmas_reg_init *reg_init) 586 { 587 unsigned int reg; 588 unsigned int addr; 589 int ret; 590 591 addr = palmas_regs_info[id].ctrl_addr; 592 593 ret = palmas_ldo_read(palmas, addr, ®); 594 if (ret) 595 return ret; 596 597 if (reg_init->warm_reset) 598 reg |= PALMAS_LDO1_CTRL_WR_S; 599 else 600 reg &= ~PALMAS_LDO1_CTRL_WR_S; 601 602 if (reg_init->mode_sleep) 603 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP; 604 else 605 reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP; 606 607 ret = palmas_ldo_write(palmas, addr, reg); 608 if (ret) 609 return ret; 610 611 return 0; 612 } 613 614 static int palmas_extreg_init(struct palmas *palmas, int id, 615 struct palmas_reg_init *reg_init) 616 { 617 unsigned int addr; 618 int ret; 619 unsigned int val = 0; 620 621 addr = palmas_regs_info[id].ctrl_addr; 622 623 if (reg_init->mode_sleep) 624 val = PALMAS_REGEN1_CTRL_MODE_SLEEP; 625 626 ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE, 627 addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val); 628 if (ret < 0) { 629 dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n", 630 addr, ret); 631 return ret; 632 } 633 return 0; 634 } 635 636 static void palmas_enable_ldo8_track(struct palmas *palmas) 637 { 638 unsigned int reg; 639 unsigned int addr; 640 int ret; 641 642 addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr; 643 644 ret = palmas_ldo_read(palmas, addr, ®); 645 if (ret) { 646 dev_err(palmas->dev, "Error in reading ldo8 control reg\n"); 647 return; 648 } 649 650 reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN; 651 ret = palmas_ldo_write(palmas, addr, reg); 652 if (ret < 0) { 653 dev_err(palmas->dev, "Error in enabling tracking mode\n"); 654 return; 655 } 656 /* 657 * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8 658 * output is defined by the LDO8_VOLTAGE.VSEL register divided by two, 659 * and can be set from 0.45 to 1.65 V. 660 */ 661 addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr; 662 ret = palmas_ldo_read(palmas, addr, ®); 663 if (ret) { 664 dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n"); 665 return; 666 } 667 668 reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK; 669 ret = palmas_ldo_write(palmas, addr, reg); 670 if (ret < 0) 671 dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n"); 672 673 return; 674 } 675 676 static struct of_regulator_match palmas_matches[] = { 677 { .name = "smps12", }, 678 { .name = "smps123", }, 679 { .name = "smps3", }, 680 { .name = "smps45", }, 681 { .name = "smps457", }, 682 { .name = "smps6", }, 683 { .name = "smps7", }, 684 { .name = "smps8", }, 685 { .name = "smps9", }, 686 { .name = "smps10_out2", }, 687 { .name = "smps10_out1", }, 688 { .name = "ldo1", }, 689 { .name = "ldo2", }, 690 { .name = "ldo3", }, 691 { .name = "ldo4", }, 692 { .name = "ldo5", }, 693 { .name = "ldo6", }, 694 { .name = "ldo7", }, 695 { .name = "ldo8", }, 696 { .name = "ldo9", }, 697 { .name = "ldoln", }, 698 { .name = "ldousb", }, 699 { .name = "regen1", }, 700 { .name = "regen2", }, 701 { .name = "regen3", }, 702 { .name = "sysen1", }, 703 { .name = "sysen2", }, 704 }; 705 706 static void palmas_dt_to_pdata(struct device *dev, 707 struct device_node *node, 708 struct palmas_pmic_platform_data *pdata) 709 { 710 struct device_node *regulators; 711 u32 prop; 712 int idx, ret; 713 714 node = of_node_get(node); 715 regulators = of_find_node_by_name(node, "regulators"); 716 if (!regulators) { 717 dev_info(dev, "regulator node not found\n"); 718 return; 719 } 720 721 ret = of_regulator_match(dev, regulators, palmas_matches, 722 PALMAS_NUM_REGS); 723 of_node_put(regulators); 724 if (ret < 0) { 725 dev_err(dev, "Error parsing regulator init data: %d\n", ret); 726 return; 727 } 728 729 for (idx = 0; idx < PALMAS_NUM_REGS; idx++) { 730 if (!palmas_matches[idx].init_data || 731 !palmas_matches[idx].of_node) 732 continue; 733 734 pdata->reg_data[idx] = palmas_matches[idx].init_data; 735 736 pdata->reg_init[idx] = devm_kzalloc(dev, 737 sizeof(struct palmas_reg_init), GFP_KERNEL); 738 739 pdata->reg_init[idx]->warm_reset = 740 of_property_read_bool(palmas_matches[idx].of_node, 741 "ti,warm-reset"); 742 743 pdata->reg_init[idx]->roof_floor = 744 of_property_read_bool(palmas_matches[idx].of_node, 745 "ti,roof-floor"); 746 747 ret = of_property_read_u32(palmas_matches[idx].of_node, 748 "ti,mode-sleep", &prop); 749 if (!ret) 750 pdata->reg_init[idx]->mode_sleep = prop; 751 752 ret = of_property_read_bool(palmas_matches[idx].of_node, 753 "ti,smps-range"); 754 if (ret) 755 pdata->reg_init[idx]->vsel = 756 PALMAS_SMPS12_VOLTAGE_RANGE; 757 758 if (idx == PALMAS_REG_LDO8) 759 pdata->enable_ldo8_tracking = of_property_read_bool( 760 palmas_matches[idx].of_node, 761 "ti,enable-ldo8-tracking"); 762 } 763 764 pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator"); 765 } 766 767 768 static int palmas_regulators_probe(struct platform_device *pdev) 769 { 770 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); 771 struct palmas_pmic_platform_data *pdata = dev_get_platdata(&pdev->dev); 772 struct device_node *node = pdev->dev.of_node; 773 struct regulator_dev *rdev; 774 struct regulator_config config = { }; 775 struct palmas_pmic *pmic; 776 struct palmas_reg_init *reg_init; 777 int id = 0, ret; 778 unsigned int addr, reg; 779 780 if (node && !pdata) { 781 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 782 783 if (!pdata) 784 return -ENOMEM; 785 786 palmas_dt_to_pdata(&pdev->dev, node, pdata); 787 } 788 789 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); 790 if (!pmic) 791 return -ENOMEM; 792 793 pmic->dev = &pdev->dev; 794 pmic->palmas = palmas; 795 palmas->pmic = pmic; 796 platform_set_drvdata(pdev, pmic); 797 798 ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®); 799 if (ret) 800 return ret; 801 802 if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN) 803 pmic->smps123 = 1; 804 805 if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN) 806 pmic->smps457 = 1; 807 808 config.regmap = palmas->regmap[REGULATOR_SLAVE]; 809 config.dev = &pdev->dev; 810 config.driver_data = pmic; 811 812 for (id = 0; id < PALMAS_REG_LDO1; id++) { 813 bool ramp_delay_support = false; 814 815 /* 816 * Miss out regulators which are not available due 817 * to slaving configurations. 818 */ 819 switch (id) { 820 case PALMAS_REG_SMPS12: 821 case PALMAS_REG_SMPS3: 822 if (pmic->smps123) 823 continue; 824 if (id == PALMAS_REG_SMPS12) 825 ramp_delay_support = true; 826 break; 827 case PALMAS_REG_SMPS123: 828 if (!pmic->smps123) 829 continue; 830 ramp_delay_support = true; 831 break; 832 case PALMAS_REG_SMPS45: 833 case PALMAS_REG_SMPS7: 834 if (pmic->smps457) 835 continue; 836 if (id == PALMAS_REG_SMPS45) 837 ramp_delay_support = true; 838 break; 839 case PALMAS_REG_SMPS457: 840 if (!pmic->smps457) 841 continue; 842 ramp_delay_support = true; 843 break; 844 case PALMAS_REG_SMPS10_OUT1: 845 case PALMAS_REG_SMPS10_OUT2: 846 if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST)) 847 continue; 848 } 849 850 if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8)) 851 ramp_delay_support = true; 852 853 if (ramp_delay_support) { 854 addr = palmas_regs_info[id].tstep_addr; 855 ret = palmas_smps_read(pmic->palmas, addr, ®); 856 if (ret < 0) { 857 dev_err(&pdev->dev, 858 "reading TSTEP reg failed: %d\n", ret); 859 goto err_unregister_regulator; 860 } 861 pmic->desc[id].ramp_delay = 862 palmas_smps_ramp_delay[reg & 0x3]; 863 pmic->ramp_delay[id] = pmic->desc[id].ramp_delay; 864 } 865 866 /* Initialise sleep/init values from platform data */ 867 if (pdata && pdata->reg_init[id]) { 868 reg_init = pdata->reg_init[id]; 869 ret = palmas_smps_init(palmas, id, reg_init); 870 if (ret) 871 goto err_unregister_regulator; 872 } 873 874 /* Register the regulators */ 875 pmic->desc[id].name = palmas_regs_info[id].name; 876 pmic->desc[id].id = id; 877 878 switch (id) { 879 case PALMAS_REG_SMPS10_OUT1: 880 case PALMAS_REG_SMPS10_OUT2: 881 pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES; 882 pmic->desc[id].ops = &palmas_ops_smps10; 883 pmic->desc[id].vsel_reg = 884 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 885 PALMAS_SMPS10_CTRL); 886 pmic->desc[id].vsel_mask = SMPS10_VSEL; 887 pmic->desc[id].enable_reg = 888 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 889 PALMAS_SMPS10_CTRL); 890 if (id == PALMAS_REG_SMPS10_OUT1) 891 pmic->desc[id].enable_mask = SMPS10_SWITCH_EN; 892 else 893 pmic->desc[id].enable_mask = SMPS10_BOOST_EN; 894 pmic->desc[id].bypass_reg = 895 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 896 PALMAS_SMPS10_CTRL); 897 pmic->desc[id].bypass_mask = SMPS10_BYPASS_EN; 898 pmic->desc[id].min_uV = 3750000; 899 pmic->desc[id].uV_step = 1250000; 900 break; 901 default: 902 /* 903 * Read and store the RANGE bit for later use 904 * This must be done before regulator is probed, 905 * otherwise we error in probe with unsupportable 906 * ranges. Read the current smps mode for later use. 907 */ 908 addr = palmas_regs_info[id].vsel_addr; 909 910 ret = palmas_smps_read(pmic->palmas, addr, ®); 911 if (ret) 912 goto err_unregister_regulator; 913 if (reg & PALMAS_SMPS12_VOLTAGE_RANGE) 914 pmic->range[id] = 1; 915 916 pmic->desc[id].ops = &palmas_ops_smps; 917 pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES; 918 pmic->desc[id].vsel_reg = 919 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 920 palmas_regs_info[id].vsel_addr); 921 pmic->desc[id].vsel_mask = 922 PALMAS_SMPS12_VOLTAGE_VSEL_MASK; 923 924 /* Read the smps mode for later use. */ 925 addr = palmas_regs_info[id].ctrl_addr; 926 ret = palmas_smps_read(pmic->palmas, addr, ®); 927 if (ret) 928 goto err_unregister_regulator; 929 pmic->current_reg_mode[id] = reg & 930 PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; 931 } 932 933 pmic->desc[id].type = REGULATOR_VOLTAGE; 934 pmic->desc[id].owner = THIS_MODULE; 935 936 if (pdata) 937 config.init_data = pdata->reg_data[id]; 938 else 939 config.init_data = NULL; 940 941 pmic->desc[id].supply_name = palmas_regs_info[id].sname; 942 config.of_node = palmas_matches[id].of_node; 943 944 rdev = regulator_register(&pmic->desc[id], &config); 945 if (IS_ERR(rdev)) { 946 dev_err(&pdev->dev, 947 "failed to register %s regulator\n", 948 pdev->name); 949 ret = PTR_ERR(rdev); 950 goto err_unregister_regulator; 951 } 952 953 /* Save regulator for cleanup */ 954 pmic->rdev[id] = rdev; 955 } 956 957 /* Start this loop from the id left from previous loop */ 958 for (; id < PALMAS_NUM_REGS; id++) { 959 960 /* Miss out regulators which are not available due 961 * to alternate functions. 962 */ 963 964 /* Register the regulators */ 965 pmic->desc[id].name = palmas_regs_info[id].name; 966 pmic->desc[id].id = id; 967 pmic->desc[id].type = REGULATOR_VOLTAGE; 968 pmic->desc[id].owner = THIS_MODULE; 969 970 if (id < PALMAS_REG_REGEN1) { 971 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES; 972 pmic->desc[id].ops = &palmas_ops_ldo; 973 pmic->desc[id].min_uV = 900000; 974 pmic->desc[id].uV_step = 50000; 975 pmic->desc[id].linear_min_sel = 1; 976 pmic->desc[id].enable_time = 500; 977 pmic->desc[id].vsel_reg = 978 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, 979 palmas_regs_info[id].vsel_addr); 980 pmic->desc[id].vsel_mask = 981 PALMAS_LDO1_VOLTAGE_VSEL_MASK; 982 pmic->desc[id].enable_reg = 983 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, 984 palmas_regs_info[id].ctrl_addr); 985 pmic->desc[id].enable_mask = 986 PALMAS_LDO1_CTRL_MODE_ACTIVE; 987 988 /* Check if LDO8 is in tracking mode or not */ 989 if (pdata && (id == PALMAS_REG_LDO8) && 990 pdata->enable_ldo8_tracking) { 991 palmas_enable_ldo8_track(palmas); 992 pmic->desc[id].min_uV = 450000; 993 pmic->desc[id].uV_step = 25000; 994 } 995 996 /* LOD6 in vibrator mode will have enable time 2000us */ 997 if (pdata && pdata->ldo6_vibrator && 998 (id == PALMAS_REG_LDO6)) 999 pmic->desc[id].enable_time = 2000; 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