1 /* 2 * Copyright (c) 2014, Sony Mobile Communications AB. 3 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 and 7 * only version 2 as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include <linux/module.h> 16 #include <linux/platform_device.h> 17 #include <linux/of.h> 18 #include <linux/of_device.h> 19 #include <linux/regulator/driver.h> 20 #include <linux/regulator/machine.h> 21 #include <linux/regulator/of_regulator.h> 22 #include <linux/mfd/qcom_rpm.h> 23 24 #include <dt-bindings/mfd/qcom-rpm.h> 25 26 #define MAX_REQUEST_LEN 2 27 28 struct request_member { 29 int word; 30 unsigned int mask; 31 int shift; 32 }; 33 34 struct rpm_reg_parts { 35 struct request_member mV; /* used if voltage is in mV */ 36 struct request_member uV; /* used if voltage is in uV */ 37 struct request_member ip; /* peak current in mA */ 38 struct request_member pd; /* pull down enable */ 39 struct request_member ia; /* average current in mA */ 40 struct request_member fm; /* force mode */ 41 struct request_member pm; /* power mode */ 42 struct request_member pc; /* pin control */ 43 struct request_member pf; /* pin function */ 44 struct request_member enable_state; /* NCP and switch */ 45 struct request_member comp_mode; /* NCP */ 46 struct request_member freq; /* frequency: NCP and SMPS */ 47 struct request_member freq_clk_src; /* clock source: SMPS */ 48 struct request_member hpm; /* switch: control OCP and SS */ 49 int request_len; 50 }; 51 52 #define FORCE_MODE_IS_2_BITS(reg) \ 53 (((reg)->parts->fm.mask >> (reg)->parts->fm.shift) == 3) 54 55 struct qcom_rpm_reg { 56 struct qcom_rpm *rpm; 57 58 struct mutex lock; 59 struct device *dev; 60 struct regulator_desc desc; 61 const struct rpm_reg_parts *parts; 62 63 int resource; 64 u32 val[MAX_REQUEST_LEN]; 65 66 int uV; 67 int is_enabled; 68 69 bool supports_force_mode_auto; 70 bool supports_force_mode_bypass; 71 }; 72 73 static const struct rpm_reg_parts rpm8660_ldo_parts = { 74 .request_len = 2, 75 .mV = { 0, 0x00000FFF, 0 }, 76 .ip = { 0, 0x00FFF000, 12 }, 77 .fm = { 0, 0x03000000, 24 }, 78 .pc = { 0, 0x3C000000, 26 }, 79 .pf = { 0, 0xC0000000, 30 }, 80 .pd = { 1, 0x00000001, 0 }, 81 .ia = { 1, 0x00001FFE, 1 }, 82 }; 83 84 static const struct rpm_reg_parts rpm8660_smps_parts = { 85 .request_len = 2, 86 .mV = { 0, 0x00000FFF, 0 }, 87 .ip = { 0, 0x00FFF000, 12 }, 88 .fm = { 0, 0x03000000, 24 }, 89 .pc = { 0, 0x3C000000, 26 }, 90 .pf = { 0, 0xC0000000, 30 }, 91 .pd = { 1, 0x00000001, 0 }, 92 .ia = { 1, 0x00001FFE, 1 }, 93 .freq = { 1, 0x001FE000, 13 }, 94 .freq_clk_src = { 1, 0x00600000, 21 }, 95 }; 96 97 static const struct rpm_reg_parts rpm8660_switch_parts = { 98 .request_len = 1, 99 .enable_state = { 0, 0x00000001, 0 }, 100 .pd = { 0, 0x00000002, 1 }, 101 .pc = { 0, 0x0000003C, 2 }, 102 .pf = { 0, 0x000000C0, 6 }, 103 .hpm = { 0, 0x00000300, 8 }, 104 }; 105 106 static const struct rpm_reg_parts rpm8660_ncp_parts = { 107 .request_len = 1, 108 .mV = { 0, 0x00000FFF, 0 }, 109 .enable_state = { 0, 0x00001000, 12 }, 110 .comp_mode = { 0, 0x00002000, 13 }, 111 .freq = { 0, 0x003FC000, 14 }, 112 }; 113 114 static const struct rpm_reg_parts rpm8960_ldo_parts = { 115 .request_len = 2, 116 .uV = { 0, 0x007FFFFF, 0 }, 117 .pd = { 0, 0x00800000, 23 }, 118 .pc = { 0, 0x0F000000, 24 }, 119 .pf = { 0, 0xF0000000, 28 }, 120 .ip = { 1, 0x000003FF, 0 }, 121 .ia = { 1, 0x000FFC00, 10 }, 122 .fm = { 1, 0x00700000, 20 }, 123 }; 124 125 static const struct rpm_reg_parts rpm8960_smps_parts = { 126 .request_len = 2, 127 .uV = { 0, 0x007FFFFF, 0 }, 128 .pd = { 0, 0x00800000, 23 }, 129 .pc = { 0, 0x0F000000, 24 }, 130 .pf = { 0, 0xF0000000, 28 }, 131 .ip = { 1, 0x000003FF, 0 }, 132 .ia = { 1, 0x000FFC00, 10 }, 133 .fm = { 1, 0x00700000, 20 }, 134 .pm = { 1, 0x00800000, 23 }, 135 .freq = { 1, 0x1F000000, 24 }, 136 .freq_clk_src = { 1, 0x60000000, 29 }, 137 }; 138 139 static const struct rpm_reg_parts rpm8960_switch_parts = { 140 .request_len = 1, 141 .enable_state = { 0, 0x00000001, 0 }, 142 .pd = { 0, 0x00000002, 1 }, 143 .pc = { 0, 0x0000003C, 2 }, 144 .pf = { 0, 0x000003C0, 6 }, 145 .hpm = { 0, 0x00000C00, 10 }, 146 }; 147 148 static const struct rpm_reg_parts rpm8960_ncp_parts = { 149 .request_len = 1, 150 .uV = { 0, 0x007FFFFF, 0 }, 151 .enable_state = { 0, 0x00800000, 23 }, 152 .comp_mode = { 0, 0x01000000, 24 }, 153 .freq = { 0, 0x3E000000, 25 }, 154 }; 155 156 /* 157 * Physically available PMIC regulator voltage ranges 158 */ 159 static const struct regulator_linear_range pldo_ranges[] = { 160 REGULATOR_LINEAR_RANGE( 750000, 0, 59, 12500), 161 REGULATOR_LINEAR_RANGE(1500000, 60, 123, 25000), 162 REGULATOR_LINEAR_RANGE(3100000, 124, 160, 50000), 163 }; 164 165 static const struct regulator_linear_range nldo_ranges[] = { 166 REGULATOR_LINEAR_RANGE( 750000, 0, 63, 12500), 167 }; 168 169 static const struct regulator_linear_range nldo1200_ranges[] = { 170 REGULATOR_LINEAR_RANGE( 375000, 0, 59, 6250), 171 REGULATOR_LINEAR_RANGE( 750000, 60, 123, 12500), 172 }; 173 174 static const struct regulator_linear_range smps_ranges[] = { 175 REGULATOR_LINEAR_RANGE( 375000, 0, 29, 12500), 176 REGULATOR_LINEAR_RANGE( 750000, 30, 89, 12500), 177 REGULATOR_LINEAR_RANGE(1500000, 90, 153, 25000), 178 }; 179 180 static const struct regulator_linear_range ftsmps_ranges[] = { 181 REGULATOR_LINEAR_RANGE( 350000, 0, 6, 50000), 182 REGULATOR_LINEAR_RANGE( 700000, 7, 63, 12500), 183 REGULATOR_LINEAR_RANGE(1500000, 64, 100, 50000), 184 }; 185 186 static const struct regulator_linear_range smb208_ranges[] = { 187 REGULATOR_LINEAR_RANGE( 375000, 0, 29, 12500), 188 REGULATOR_LINEAR_RANGE( 750000, 30, 89, 12500), 189 REGULATOR_LINEAR_RANGE(1500000, 90, 153, 25000), 190 REGULATOR_LINEAR_RANGE(3100000, 154, 234, 25000), 191 }; 192 193 static const struct regulator_linear_range ncp_ranges[] = { 194 REGULATOR_LINEAR_RANGE(1500000, 0, 31, 50000), 195 }; 196 197 static int rpm_reg_write(struct qcom_rpm_reg *vreg, 198 const struct request_member *req, 199 const int value) 200 { 201 if (WARN_ON((value << req->shift) & ~req->mask)) 202 return -EINVAL; 203 204 vreg->val[req->word] &= ~req->mask; 205 vreg->val[req->word] |= value << req->shift; 206 207 return qcom_rpm_write(vreg->rpm, 208 QCOM_RPM_ACTIVE_STATE, 209 vreg->resource, 210 vreg->val, 211 vreg->parts->request_len); 212 } 213 214 static int rpm_reg_set_mV_sel(struct regulator_dev *rdev, 215 unsigned selector) 216 { 217 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 218 const struct rpm_reg_parts *parts = vreg->parts; 219 const struct request_member *req = &parts->mV; 220 int ret = 0; 221 int uV; 222 223 if (req->mask == 0) 224 return -EINVAL; 225 226 uV = regulator_list_voltage_linear_range(rdev, selector); 227 if (uV < 0) 228 return uV; 229 230 mutex_lock(&vreg->lock); 231 if (vreg->is_enabled) 232 ret = rpm_reg_write(vreg, req, uV / 1000); 233 234 if (!ret) 235 vreg->uV = uV; 236 mutex_unlock(&vreg->lock); 237 238 return ret; 239 } 240 241 static int rpm_reg_set_uV_sel(struct regulator_dev *rdev, 242 unsigned selector) 243 { 244 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 245 const struct rpm_reg_parts *parts = vreg->parts; 246 const struct request_member *req = &parts->uV; 247 int ret = 0; 248 int uV; 249 250 if (req->mask == 0) 251 return -EINVAL; 252 253 uV = regulator_list_voltage_linear_range(rdev, selector); 254 if (uV < 0) 255 return uV; 256 257 mutex_lock(&vreg->lock); 258 if (vreg->is_enabled) 259 ret = rpm_reg_write(vreg, req, uV); 260 261 if (!ret) 262 vreg->uV = uV; 263 mutex_unlock(&vreg->lock); 264 265 return ret; 266 } 267 268 static int rpm_reg_get_voltage(struct regulator_dev *rdev) 269 { 270 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 271 272 return vreg->uV; 273 } 274 275 static int rpm_reg_mV_enable(struct regulator_dev *rdev) 276 { 277 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 278 const struct rpm_reg_parts *parts = vreg->parts; 279 const struct request_member *req = &parts->mV; 280 int ret; 281 282 if (req->mask == 0) 283 return -EINVAL; 284 285 mutex_lock(&vreg->lock); 286 ret = rpm_reg_write(vreg, req, vreg->uV / 1000); 287 if (!ret) 288 vreg->is_enabled = 1; 289 mutex_unlock(&vreg->lock); 290 291 return ret; 292 } 293 294 static int rpm_reg_uV_enable(struct regulator_dev *rdev) 295 { 296 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 297 const struct rpm_reg_parts *parts = vreg->parts; 298 const struct request_member *req = &parts->uV; 299 int ret; 300 301 if (req->mask == 0) 302 return -EINVAL; 303 304 mutex_lock(&vreg->lock); 305 ret = rpm_reg_write(vreg, req, vreg->uV); 306 if (!ret) 307 vreg->is_enabled = 1; 308 mutex_unlock(&vreg->lock); 309 310 return ret; 311 } 312 313 static int rpm_reg_switch_enable(struct regulator_dev *rdev) 314 { 315 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 316 const struct rpm_reg_parts *parts = vreg->parts; 317 const struct request_member *req = &parts->enable_state; 318 int ret; 319 320 if (req->mask == 0) 321 return -EINVAL; 322 323 mutex_lock(&vreg->lock); 324 ret = rpm_reg_write(vreg, req, 1); 325 if (!ret) 326 vreg->is_enabled = 1; 327 mutex_unlock(&vreg->lock); 328 329 return ret; 330 } 331 332 static int rpm_reg_mV_disable(struct regulator_dev *rdev) 333 { 334 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 335 const struct rpm_reg_parts *parts = vreg->parts; 336 const struct request_member *req = &parts->mV; 337 int ret; 338 339 if (req->mask == 0) 340 return -EINVAL; 341 342 mutex_lock(&vreg->lock); 343 ret = rpm_reg_write(vreg, req, 0); 344 if (!ret) 345 vreg->is_enabled = 0; 346 mutex_unlock(&vreg->lock); 347 348 return ret; 349 } 350 351 static int rpm_reg_uV_disable(struct regulator_dev *rdev) 352 { 353 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 354 const struct rpm_reg_parts *parts = vreg->parts; 355 const struct request_member *req = &parts->uV; 356 int ret; 357 358 if (req->mask == 0) 359 return -EINVAL; 360 361 mutex_lock(&vreg->lock); 362 ret = rpm_reg_write(vreg, req, 0); 363 if (!ret) 364 vreg->is_enabled = 0; 365 mutex_unlock(&vreg->lock); 366 367 return ret; 368 } 369 370 static int rpm_reg_switch_disable(struct regulator_dev *rdev) 371 { 372 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 373 const struct rpm_reg_parts *parts = vreg->parts; 374 const struct request_member *req = &parts->enable_state; 375 int ret; 376 377 if (req->mask == 0) 378 return -EINVAL; 379 380 mutex_lock(&vreg->lock); 381 ret = rpm_reg_write(vreg, req, 0); 382 if (!ret) 383 vreg->is_enabled = 0; 384 mutex_unlock(&vreg->lock); 385 386 return ret; 387 } 388 389 static int rpm_reg_is_enabled(struct regulator_dev *rdev) 390 { 391 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); 392 393 return vreg->is_enabled; 394 } 395 396 static struct regulator_ops uV_ops = { 397 .list_voltage = regulator_list_voltage_linear_range, 398 399 .set_voltage_sel = rpm_reg_set_uV_sel, 400 .get_voltage = rpm_reg_get_voltage, 401 402 .enable = rpm_reg_uV_enable, 403 .disable = rpm_reg_uV_disable, 404 .is_enabled = rpm_reg_is_enabled, 405 }; 406 407 static struct regulator_ops mV_ops = { 408 .list_voltage = regulator_list_voltage_linear_range, 409 410 .set_voltage_sel = rpm_reg_set_mV_sel, 411 .get_voltage = rpm_reg_get_voltage, 412 413 .enable = rpm_reg_mV_enable, 414 .disable = rpm_reg_mV_disable, 415 .is_enabled = rpm_reg_is_enabled, 416 }; 417 418 static struct regulator_ops switch_ops = { 419 .enable = rpm_reg_switch_enable, 420 .disable = rpm_reg_switch_disable, 421 .is_enabled = rpm_reg_is_enabled, 422 }; 423 424 /* 425 * PM8058 regulators 426 */ 427 static const struct qcom_rpm_reg pm8058_pldo = { 428 .desc.linear_ranges = pldo_ranges, 429 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges), 430 .desc.n_voltages = 161, 431 .desc.ops = &mV_ops, 432 .parts = &rpm8660_ldo_parts, 433 .supports_force_mode_auto = false, 434 .supports_force_mode_bypass = false, 435 }; 436 437 static const struct qcom_rpm_reg pm8058_nldo = { 438 .desc.linear_ranges = nldo_ranges, 439 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges), 440 .desc.n_voltages = 64, 441 .desc.ops = &mV_ops, 442 .parts = &rpm8660_ldo_parts, 443 .supports_force_mode_auto = false, 444 .supports_force_mode_bypass = false, 445 }; 446 447 static const struct qcom_rpm_reg pm8058_smps = { 448 .desc.linear_ranges = smps_ranges, 449 .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges), 450 .desc.n_voltages = 154, 451 .desc.ops = &mV_ops, 452 .parts = &rpm8660_smps_parts, 453 .supports_force_mode_auto = false, 454 .supports_force_mode_bypass = false, 455 }; 456 457 static const struct qcom_rpm_reg pm8058_ncp = { 458 .desc.linear_ranges = ncp_ranges, 459 .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges), 460 .desc.n_voltages = 32, 461 .desc.ops = &mV_ops, 462 .parts = &rpm8660_ncp_parts, 463 }; 464 465 static const struct qcom_rpm_reg pm8058_switch = { 466 .desc.ops = &switch_ops, 467 .parts = &rpm8660_switch_parts, 468 }; 469 470 /* 471 * PM8901 regulators 472 */ 473 static const struct qcom_rpm_reg pm8901_pldo = { 474 .desc.linear_ranges = pldo_ranges, 475 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges), 476 .desc.n_voltages = 161, 477 .desc.ops = &mV_ops, 478 .parts = &rpm8660_ldo_parts, 479 .supports_force_mode_auto = false, 480 .supports_force_mode_bypass = true, 481 }; 482 483 static const struct qcom_rpm_reg pm8901_nldo = { 484 .desc.linear_ranges = nldo_ranges, 485 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges), 486 .desc.n_voltages = 64, 487 .desc.ops = &mV_ops, 488 .parts = &rpm8660_ldo_parts, 489 .supports_force_mode_auto = false, 490 .supports_force_mode_bypass = true, 491 }; 492 493 static const struct qcom_rpm_reg pm8901_ftsmps = { 494 .desc.linear_ranges = ftsmps_ranges, 495 .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges), 496 .desc.n_voltages = 101, 497 .desc.ops = &mV_ops, 498 .parts = &rpm8660_smps_parts, 499 .supports_force_mode_auto = true, 500 .supports_force_mode_bypass = false, 501 }; 502 503 static const struct qcom_rpm_reg pm8901_switch = { 504 .desc.ops = &switch_ops, 505 .parts = &rpm8660_switch_parts, 506 }; 507 508 /* 509 * PM8921 regulators 510 */ 511 static const struct qcom_rpm_reg pm8921_pldo = { 512 .desc.linear_ranges = pldo_ranges, 513 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges), 514 .desc.n_voltages = 161, 515 .desc.ops = &uV_ops, 516 .parts = &rpm8960_ldo_parts, 517 .supports_force_mode_auto = false, 518 .supports_force_mode_bypass = true, 519 }; 520 521 static const struct qcom_rpm_reg pm8921_nldo = { 522 .desc.linear_ranges = nldo_ranges, 523 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges), 524 .desc.n_voltages = 64, 525 .desc.ops = &uV_ops, 526 .parts = &rpm8960_ldo_parts, 527 .supports_force_mode_auto = false, 528 .supports_force_mode_bypass = true, 529 }; 530 531 static const struct qcom_rpm_reg pm8921_nldo1200 = { 532 .desc.linear_ranges = nldo1200_ranges, 533 .desc.n_linear_ranges = ARRAY_SIZE(nldo1200_ranges), 534 .desc.n_voltages = 124, 535 .desc.ops = &uV_ops, 536 .parts = &rpm8960_ldo_parts, 537 .supports_force_mode_auto = false, 538 .supports_force_mode_bypass = true, 539 }; 540 541 static const struct qcom_rpm_reg pm8921_smps = { 542 .desc.linear_ranges = smps_ranges, 543 .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges), 544 .desc.n_voltages = 154, 545 .desc.ops = &uV_ops, 546 .parts = &rpm8960_smps_parts, 547 .supports_force_mode_auto = true, 548 .supports_force_mode_bypass = false, 549 }; 550 551 static const struct qcom_rpm_reg pm8921_ftsmps = { 552 .desc.linear_ranges = ftsmps_ranges, 553 .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges), 554 .desc.n_voltages = 101, 555 .desc.ops = &uV_ops, 556 .parts = &rpm8960_smps_parts, 557 .supports_force_mode_auto = true, 558 .supports_force_mode_bypass = false, 559 }; 560 561 static const struct qcom_rpm_reg pm8921_ncp = { 562 .desc.linear_ranges = ncp_ranges, 563 .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges), 564 .desc.n_voltages = 32, 565 .desc.ops = &uV_ops, 566 .parts = &rpm8960_ncp_parts, 567 }; 568 569 static const struct qcom_rpm_reg pm8921_switch = { 570 .desc.ops = &switch_ops, 571 .parts = &rpm8960_switch_parts, 572 }; 573 574 static const struct qcom_rpm_reg smb208_smps = { 575 .desc.linear_ranges = smb208_ranges, 576 .desc.n_linear_ranges = ARRAY_SIZE(smb208_ranges), 577 .desc.n_voltages = 235, 578 .desc.ops = &uV_ops, 579 .parts = &rpm8960_smps_parts, 580 .supports_force_mode_auto = false, 581 .supports_force_mode_bypass = false, 582 }; 583 584 static const struct of_device_id rpm_of_match[] = { 585 { .compatible = "qcom,rpm-pm8058-pldo", .data = &pm8058_pldo }, 586 { .compatible = "qcom,rpm-pm8058-nldo", .data = &pm8058_nldo }, 587 { .compatible = "qcom,rpm-pm8058-smps", .data = &pm8058_smps }, 588 { .compatible = "qcom,rpm-pm8058-ncp", .data = &pm8058_ncp }, 589 { .compatible = "qcom,rpm-pm8058-switch", .data = &pm8058_switch }, 590 591 { .compatible = "qcom,rpm-pm8901-pldo", .data = &pm8901_pldo }, 592 { .compatible = "qcom,rpm-pm8901-nldo", .data = &pm8901_nldo }, 593 { .compatible = "qcom,rpm-pm8901-ftsmps", .data = &pm8901_ftsmps }, 594 { .compatible = "qcom,rpm-pm8901-switch", .data = &pm8901_switch }, 595 596 { .compatible = "qcom,rpm-pm8921-pldo", .data = &pm8921_pldo }, 597 { .compatible = "qcom,rpm-pm8921-nldo", .data = &pm8921_nldo }, 598 { .compatible = "qcom,rpm-pm8921-nldo1200", .data = &pm8921_nldo1200 }, 599 { .compatible = "qcom,rpm-pm8921-smps", .data = &pm8921_smps }, 600 { .compatible = "qcom,rpm-pm8921-ftsmps", .data = &pm8921_ftsmps }, 601 { .compatible = "qcom,rpm-pm8921-ncp", .data = &pm8921_ncp }, 602 { .compatible = "qcom,rpm-pm8921-switch", .data = &pm8921_switch }, 603 604 { .compatible = "qcom,rpm-smb208", .data = &smb208_smps }, 605 { } 606 }; 607 MODULE_DEVICE_TABLE(of, rpm_of_match); 608 609 static int rpm_reg_set(struct qcom_rpm_reg *vreg, 610 const struct request_member *req, 611 const int value) 612 { 613 if (req->mask == 0 || (value << req->shift) & ~req->mask) 614 return -EINVAL; 615 616 vreg->val[req->word] &= ~req->mask; 617 vreg->val[req->word] |= value << req->shift; 618 619 return 0; 620 } 621 622 static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg) 623 { 624 static const int freq_table[] = { 625 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000, 626 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000, 627 1280000, 1200000, 628 629 }; 630 const char *key; 631 u32 freq; 632 int ret; 633 int i; 634 635 key = "qcom,switch-mode-frequency"; 636 ret = of_property_read_u32(dev->of_node, key, &freq); 637 if (ret) { 638 dev_err(dev, "regulator requires %s property\n", key); 639 return -EINVAL; 640 } 641 642 for (i = 0; i < ARRAY_SIZE(freq_table); i++) { 643 if (freq == freq_table[i]) { 644 rpm_reg_set(vreg, &vreg->parts->freq, i + 1); 645 return 0; 646 } 647 } 648 649 dev_err(dev, "invalid frequency %d\n", freq); 650 return -EINVAL; 651 } 652 653 static int rpm_reg_probe(struct platform_device *pdev) 654 { 655 struct regulator_init_data *initdata; 656 const struct qcom_rpm_reg *template; 657 const struct of_device_id *match; 658 struct regulator_config config = { }; 659 struct regulator_dev *rdev; 660 struct qcom_rpm_reg *vreg; 661 const char *key; 662 u32 force_mode; 663 bool pwm; 664 u32 val; 665 int ret; 666 667 match = of_match_device(rpm_of_match, &pdev->dev); 668 template = match->data; 669 670 vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL); 671 if (!vreg) { 672 dev_err(&pdev->dev, "failed to allocate vreg\n"); 673 return -ENOMEM; 674 } 675 memcpy(vreg, template, sizeof(*vreg)); 676 mutex_init(&vreg->lock); 677 vreg->dev = &pdev->dev; 678 vreg->desc.id = -1; 679 vreg->desc.owner = THIS_MODULE; 680 vreg->desc.type = REGULATOR_VOLTAGE; 681 vreg->desc.name = pdev->dev.of_node->name; 682 vreg->desc.supply_name = "vin"; 683 684 vreg->rpm = dev_get_drvdata(pdev->dev.parent); 685 if (!vreg->rpm) { 686 dev_err(&pdev->dev, "unable to retrieve handle to rpm\n"); 687 return -ENODEV; 688 } 689 690 initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node, 691 &vreg->desc); 692 if (!initdata) 693 return -EINVAL; 694 695 key = "reg"; 696 ret = of_property_read_u32(pdev->dev.of_node, key, &val); 697 if (ret) { 698 dev_err(&pdev->dev, "failed to read %s\n", key); 699 return ret; 700 } 701 vreg->resource = val; 702 703 if ((vreg->parts->uV.mask || vreg->parts->mV.mask) && 704 (!initdata->constraints.min_uV || !initdata->constraints.max_uV)) { 705 dev_err(&pdev->dev, "no voltage specified for regulator\n"); 706 return -EINVAL; 707 } 708 709 key = "bias-pull-down"; 710 if (of_property_read_bool(pdev->dev.of_node, key)) { 711 ret = rpm_reg_set(vreg, &vreg->parts->pd, 1); 712 if (ret) { 713 dev_err(&pdev->dev, "%s is invalid", key); 714 return ret; 715 } 716 } 717 718 if (vreg->parts->freq.mask) { 719 ret = rpm_reg_of_parse_freq(&pdev->dev, vreg); 720 if (ret < 0) 721 return ret; 722 } 723 724 if (vreg->parts->pm.mask) { 725 key = "qcom,power-mode-hysteretic"; 726 pwm = !of_property_read_bool(pdev->dev.of_node, key); 727 728 ret = rpm_reg_set(vreg, &vreg->parts->pm, pwm); 729 if (ret) { 730 dev_err(&pdev->dev, "failed to set power mode\n"); 731 return ret; 732 } 733 } 734 735 if (vreg->parts->fm.mask) { 736 force_mode = -1; 737 738 key = "qcom,force-mode"; 739 ret = of_property_read_u32(pdev->dev.of_node, key, &val); 740 if (ret == -EINVAL) { 741 val = QCOM_RPM_FORCE_MODE_NONE; 742 } else if (ret < 0) { 743 dev_err(&pdev->dev, "failed to read %s\n", key); 744 return ret; 745 } 746 747 /* 748 * If force-mode is encoded as 2 bits then the 749 * possible register values are: 750 * NONE, LPM, HPM 751 * otherwise: 752 * NONE, LPM, AUTO, HPM, BYPASS 753 */ 754 switch (val) { 755 case QCOM_RPM_FORCE_MODE_NONE: 756 force_mode = 0; 757 break; 758 case QCOM_RPM_FORCE_MODE_LPM: 759 force_mode = 1; 760 break; 761 case QCOM_RPM_FORCE_MODE_HPM: 762 if (FORCE_MODE_IS_2_BITS(vreg)) 763 force_mode = 2; 764 else 765 force_mode = 3; 766 break; 767 case QCOM_RPM_FORCE_MODE_AUTO: 768 if (vreg->supports_force_mode_auto) 769 force_mode = 2; 770 break; 771 case QCOM_RPM_FORCE_MODE_BYPASS: 772 if (vreg->supports_force_mode_bypass) 773 force_mode = 4; 774 break; 775 } 776 777 if (force_mode == -1) { 778 dev_err(&pdev->dev, "invalid force mode\n"); 779 return -EINVAL; 780 } 781 782 ret = rpm_reg_set(vreg, &vreg->parts->fm, force_mode); 783 if (ret) { 784 dev_err(&pdev->dev, "failed to set force mode\n"); 785 return ret; 786 } 787 } 788 789 config.dev = &pdev->dev; 790 config.init_data = initdata; 791 config.driver_data = vreg; 792 config.of_node = pdev->dev.of_node; 793 rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config); 794 if (IS_ERR(rdev)) { 795 dev_err(&pdev->dev, "can't register regulator\n"); 796 return PTR_ERR(rdev); 797 } 798 799 return 0; 800 } 801 802 static struct platform_driver rpm_reg_driver = { 803 .probe = rpm_reg_probe, 804 .driver = { 805 .name = "qcom_rpm_reg", 806 .of_match_table = of_match_ptr(rpm_of_match), 807 }, 808 }; 809 810 static int __init rpm_reg_init(void) 811 { 812 return platform_driver_register(&rpm_reg_driver); 813 } 814 subsys_initcall(rpm_reg_init); 815 816 static void __exit rpm_reg_exit(void) 817 { 818 platform_driver_unregister(&rpm_reg_driver); 819 } 820 module_exit(rpm_reg_exit) 821 822 MODULE_DESCRIPTION("Qualcomm RPM regulator driver"); 823 MODULE_LICENSE("GPL v2"); 824