drivers/regulator/qcom_rpm-regulator.c

   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 int rpm_reg_set_load(struct regulator_dev *rdev, int load_uA)
 397 {
 398         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
 399         const struct rpm_reg_parts *parts = vreg->parts;
 400         const struct request_member *req = &parts->ia;
 401         int load_mA = load_uA / 1000;
 402         int max_mA = req->mask >> req->shift;
 403         int ret;
 404
 405         if (req->mask == 0)
 406                 return -EINVAL;
 407
 408         if (load_mA > max_mA)
 409                 load_mA = max_mA;
 410
 411         mutex_lock(&vreg->lock);
 412         ret = rpm_reg_write(vreg, req, load_mA);
 413         mutex_unlock(&vreg->lock);
 414
 415         return ret;
 416 }
 417
 418 static struct regulator_ops uV_ops = {
 419         .list_voltage = regulator_list_voltage_linear_range,
 420
 421         .set_voltage_sel = rpm_reg_set_uV_sel,
 422         .get_voltage = rpm_reg_get_voltage,
 423
 424         .enable = rpm_reg_uV_enable,
 425         .disable = rpm_reg_uV_disable,
 426         .is_enabled = rpm_reg_is_enabled,
 427
 428         .set_load = rpm_reg_set_load,
 429 };
 430
 431 static struct regulator_ops mV_ops = {
 432         .list_voltage = regulator_list_voltage_linear_range,
 433
 434         .set_voltage_sel = rpm_reg_set_mV_sel,
 435         .get_voltage = rpm_reg_get_voltage,
 436
 437         .enable = rpm_reg_mV_enable,
 438         .disable = rpm_reg_mV_disable,
 439         .is_enabled = rpm_reg_is_enabled,
 440
 441         .set_load = rpm_reg_set_load,
 442 };
 443
 444 static struct regulator_ops switch_ops = {
 445         .enable = rpm_reg_switch_enable,
 446         .disable = rpm_reg_switch_disable,
 447         .is_enabled = rpm_reg_is_enabled,
 448 };
 449
 450 /*
 451  * PM8058 regulators
 452  */
 453 static const struct qcom_rpm_reg pm8058_pldo = {
 454         .desc.linear_ranges = pldo_ranges,
 455         .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
 456         .desc.n_voltages = 161,
 457         .desc.ops = &mV_ops,
 458         .parts = &rpm8660_ldo_parts,
 459         .supports_force_mode_auto = false,
 460         .supports_force_mode_bypass = false,
 461 };
 462
 463 static const struct qcom_rpm_reg pm8058_nldo = {
 464         .desc.linear_ranges = nldo_ranges,
 465         .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
 466         .desc.n_voltages = 64,
 467         .desc.ops = &mV_ops,
 468         .parts = &rpm8660_ldo_parts,
 469         .supports_force_mode_auto = false,
 470         .supports_force_mode_bypass = false,
 471 };
 472
 473 static const struct qcom_rpm_reg pm8058_smps = {
 474         .desc.linear_ranges = smps_ranges,
 475         .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
 476         .desc.n_voltages = 154,
 477         .desc.ops = &mV_ops,
 478         .parts = &rpm8660_smps_parts,
 479         .supports_force_mode_auto = false,
 480         .supports_force_mode_bypass = false,
 481 };
 482
 483 static const struct qcom_rpm_reg pm8058_ncp = {
 484         .desc.linear_ranges = ncp_ranges,
 485         .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
 486         .desc.n_voltages = 32,
 487         .desc.ops = &mV_ops,
 488         .parts = &rpm8660_ncp_parts,
 489 };
 490
 491 static const struct qcom_rpm_reg pm8058_switch = {
 492         .desc.ops = &switch_ops,
 493         .parts = &rpm8660_switch_parts,
 494 };
 495
 496 /*
 497  * PM8901 regulators
 498  */
 499 static const struct qcom_rpm_reg pm8901_pldo = {
 500         .desc.linear_ranges = pldo_ranges,
 501         .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
 502         .desc.n_voltages = 161,
 503         .desc.ops = &mV_ops,
 504         .parts = &rpm8660_ldo_parts,
 505         .supports_force_mode_auto = false,
 506         .supports_force_mode_bypass = true,
 507 };
 508
 509 static const struct qcom_rpm_reg pm8901_nldo = {
 510         .desc.linear_ranges = nldo_ranges,
 511         .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
 512         .desc.n_voltages = 64,
 513         .desc.ops = &mV_ops,
 514         .parts = &rpm8660_ldo_parts,
 515         .supports_force_mode_auto = false,
 516         .supports_force_mode_bypass = true,
 517 };
 518
 519 static const struct qcom_rpm_reg pm8901_ftsmps = {
 520         .desc.linear_ranges = ftsmps_ranges,
 521         .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
 522         .desc.n_voltages = 101,
 523         .desc.ops = &mV_ops,
 524         .parts = &rpm8660_smps_parts,
 525         .supports_force_mode_auto = true,
 526         .supports_force_mode_bypass = false,
 527 };
 528
 529 static const struct qcom_rpm_reg pm8901_switch = {
 530         .desc.ops = &switch_ops,
 531         .parts = &rpm8660_switch_parts,
 532 };
 533
 534 /*
 535  * PM8921 regulators
 536  */
 537 static const struct qcom_rpm_reg pm8921_pldo = {
 538         .desc.linear_ranges = pldo_ranges,
 539         .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
 540         .desc.n_voltages = 161,
 541         .desc.ops = &uV_ops,
 542         .parts = &rpm8960_ldo_parts,
 543         .supports_force_mode_auto = false,
 544         .supports_force_mode_bypass = true,
 545 };
 546
 547 static const struct qcom_rpm_reg pm8921_nldo = {
 548         .desc.linear_ranges = nldo_ranges,
 549         .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
 550         .desc.n_voltages = 64,
 551         .desc.ops = &uV_ops,
 552         .parts = &rpm8960_ldo_parts,
 553         .supports_force_mode_auto = false,
 554         .supports_force_mode_bypass = true,
 555 };
 556
 557 static const struct qcom_rpm_reg pm8921_nldo1200 = {
 558         .desc.linear_ranges = nldo1200_ranges,
 559         .desc.n_linear_ranges = ARRAY_SIZE(nldo1200_ranges),
 560         .desc.n_voltages = 124,
 561         .desc.ops = &uV_ops,
 562         .parts = &rpm8960_ldo_parts,
 563         .supports_force_mode_auto = false,
 564         .supports_force_mode_bypass = true,
 565 };
 566
 567 static const struct qcom_rpm_reg pm8921_smps = {
 568         .desc.linear_ranges = smps_ranges,
 569         .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
 570         .desc.n_voltages = 154,
 571         .desc.ops = &uV_ops,
 572         .parts = &rpm8960_smps_parts,
 573         .supports_force_mode_auto = true,
 574         .supports_force_mode_bypass = false,
 575 };
 576
 577 static const struct qcom_rpm_reg pm8921_ftsmps = {
 578         .desc.linear_ranges = ftsmps_ranges,
 579         .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
 580         .desc.n_voltages = 101,
 581         .desc.ops = &uV_ops,
 582         .parts = &rpm8960_smps_parts,
 583         .supports_force_mode_auto = true,
 584         .supports_force_mode_bypass = false,
 585 };
 586
 587 static const struct qcom_rpm_reg pm8921_ncp = {
 588         .desc.linear_ranges = ncp_ranges,
 589         .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
 590         .desc.n_voltages = 32,
 591         .desc.ops = &uV_ops,
 592         .parts = &rpm8960_ncp_parts,
 593 };
 594
 595 static const struct qcom_rpm_reg pm8921_switch = {
 596         .desc.ops = &switch_ops,
 597         .parts = &rpm8960_switch_parts,
 598 };
 599
 600 static const struct qcom_rpm_reg smb208_smps = {
 601         .desc.linear_ranges = smb208_ranges,
 602         .desc.n_linear_ranges = ARRAY_SIZE(smb208_ranges),
 603         .desc.n_voltages = 235,
 604         .desc.ops = &uV_ops,
 605         .parts = &rpm8960_smps_parts,
 606         .supports_force_mode_auto = false,
 607         .supports_force_mode_bypass = false,
 608 };
 609
 610 static const struct of_device_id rpm_of_match[] = {
 611         { .compatible = "qcom,rpm-pm8058-pldo",     .data = &pm8058_pldo },
 612         { .compatible = "qcom,rpm-pm8058-nldo",     .data = &pm8058_nldo },
 613         { .compatible = "qcom,rpm-pm8058-smps",     .data = &pm8058_smps },
 614         { .compatible = "qcom,rpm-pm8058-ncp",      .data = &pm8058_ncp },
 615         { .compatible = "qcom,rpm-pm8058-switch",   .data = &pm8058_switch },
 616
 617         { .compatible = "qcom,rpm-pm8901-pldo",     .data = &pm8901_pldo },
 618         { .compatible = "qcom,rpm-pm8901-nldo",     .data = &pm8901_nldo },
 619         { .compatible = "qcom,rpm-pm8901-ftsmps",   .data = &pm8901_ftsmps },
 620         { .compatible = "qcom,rpm-pm8901-switch",   .data = &pm8901_switch },
 621
 622         { .compatible = "qcom,rpm-pm8921-pldo",     .data = &pm8921_pldo },
 623         { .compatible = "qcom,rpm-pm8921-nldo",     .data = &pm8921_nldo },
 624         { .compatible = "qcom,rpm-pm8921-nldo1200", .data = &pm8921_nldo1200 },
 625         { .compatible = "qcom,rpm-pm8921-smps",     .data = &pm8921_smps },
 626         { .compatible = "qcom,rpm-pm8921-ftsmps",   .data = &pm8921_ftsmps },
 627         { .compatible = "qcom,rpm-pm8921-ncp",      .data = &pm8921_ncp },
 628         { .compatible = "qcom,rpm-pm8921-switch",   .data = &pm8921_switch },
 629
 630         { .compatible = "qcom,rpm-smb208", .data = &smb208_smps },
 631         { }
 632 };
 633 MODULE_DEVICE_TABLE(of, rpm_of_match);
 634
 635 static int rpm_reg_set(struct qcom_rpm_reg *vreg,
 636                        const struct request_member *req,
 637                        const int value)
 638 {
 639         if (req->mask == 0 || (value << req->shift) & ~req->mask)
 640                 return -EINVAL;
 641
 642         vreg->val[req->word] &= ~req->mask;
 643         vreg->val[req->word] |= value << req->shift;
 644
 645         return 0;
 646 }
 647
 648 static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
 649 {
 650         static const int freq_table[] = {
 651                 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000,
 652                 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000,
 653                 1280000, 1200000,
 654
 655         };
 656         const char *key;
 657         u32 freq;
 658         int ret;
 659         int i;
 660
 661         key = "qcom,switch-mode-frequency";
 662         ret = of_property_read_u32(dev->of_node, key, &freq);
 663         if (ret) {
 664                 dev_err(dev, "regulator requires %s property\n", key);
 665                 return -EINVAL;
 666         }
 667
 668         for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
 669                 if (freq == freq_table[i]) {
 670                         rpm_reg_set(vreg, &vreg->parts->freq, i + 1);
 671                         return 0;
 672                 }
 673         }
 674
 675         dev_err(dev, "invalid frequency %d\n", freq);
 676         return -EINVAL;
 677 }
 678
 679 static int rpm_reg_probe(struct platform_device *pdev)
 680 {
 681         struct regulator_init_data *initdata;
 682         const struct qcom_rpm_reg *template;
 683         const struct of_device_id *match;
 684         struct regulator_config config = { };
 685         struct regulator_dev *rdev;
 686         struct qcom_rpm_reg *vreg;
 687         const char *key;
 688         u32 force_mode;
 689         bool pwm;
 690         u32 val;
 691         int ret;
 692
 693         match = of_match_device(rpm_of_match, &pdev->dev);
 694         template = match->data;
 695
 696         vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
 697         if (!vreg) {
 698                 dev_err(&pdev->dev, "failed to allocate vreg\n");
 699                 return -ENOMEM;
 700         }
 701         memcpy(vreg, template, sizeof(*vreg));
 702         mutex_init(&vreg->lock);
 703         vreg->dev = &pdev->dev;
 704         vreg->desc.id = -1;
 705         vreg->desc.owner = THIS_MODULE;
 706         vreg->desc.type = REGULATOR_VOLTAGE;
 707         vreg->desc.name = pdev->dev.of_node->name;
 708         vreg->desc.supply_name = "vin";
 709
 710         vreg->rpm = dev_get_drvdata(pdev->dev.parent);
 711         if (!vreg->rpm) {
 712                 dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
 713                 return -ENODEV;
 714         }
 715
 716         initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
 717                                               &vreg->desc);
 718         if (!initdata)
 719                 return -EINVAL;
 720
 721         key = "reg";
 722         ret = of_property_read_u32(pdev->dev.of_node, key, &val);
 723         if (ret) {
 724                 dev_err(&pdev->dev, "failed to read %s\n", key);
 725                 return ret;
 726         }
 727         vreg->resource = val;
 728
 729         if ((vreg->parts->uV.mask || vreg->parts->mV.mask) &&
 730             (!initdata->constraints.min_uV || !initdata->constraints.max_uV)) {
 731                 dev_err(&pdev->dev, "no voltage specified for regulator\n");
 732                 return -EINVAL;
 733         }
 734
 735         key = "bias-pull-down";
 736         if (of_property_read_bool(pdev->dev.of_node, key)) {
 737                 ret = rpm_reg_set(vreg, &vreg->parts->pd, 1);
 738                 if (ret) {
 739                         dev_err(&pdev->dev, "%s is invalid", key);
 740                         return ret;
 741                 }
 742         }
 743
 744         if (vreg->parts->freq.mask) {
 745                 ret = rpm_reg_of_parse_freq(&pdev->dev, vreg);
 746                 if (ret < 0)
 747                         return ret;
 748         }
 749
 750         if (vreg->parts->pm.mask) {
 751                 key = "qcom,power-mode-hysteretic";
 752                 pwm = !of_property_read_bool(pdev->dev.of_node, key);
 753
 754                 ret = rpm_reg_set(vreg, &vreg->parts->pm, pwm);
 755                 if (ret) {
 756                         dev_err(&pdev->dev, "failed to set power mode\n");
 757                         return ret;
 758                 }
 759         }
 760
 761         if (vreg->parts->fm.mask) {
 762                 force_mode = -1;
 763
 764                 key = "qcom,force-mode";
 765                 ret = of_property_read_u32(pdev->dev.of_node, key, &val);
 766                 if (ret == -EINVAL) {
 767                         val = QCOM_RPM_FORCE_MODE_NONE;
 768                 } else if (ret < 0) {
 769                         dev_err(&pdev->dev, "failed to read %s\n", key);
 770                         return ret;
 771                 }
 772
 773                 /*
 774                  * If force-mode is encoded as 2 bits then the
 775                  * possible register values are:
 776                  * NONE, LPM, HPM
 777                  * otherwise:
 778                  * NONE, LPM, AUTO, HPM, BYPASS
 779                  */
 780                 switch (val) {
 781                 case QCOM_RPM_FORCE_MODE_NONE:
 782                         force_mode = 0;
 783                         break;
 784                 case QCOM_RPM_FORCE_MODE_LPM:
 785                         force_mode = 1;
 786                         break;
 787                 case QCOM_RPM_FORCE_MODE_HPM:
 788                         if (FORCE_MODE_IS_2_BITS(vreg))
 789                                 force_mode = 2;
 790                         else
 791                                 force_mode = 3;
 792                         break;
 793                 case QCOM_RPM_FORCE_MODE_AUTO:
 794                         if (vreg->supports_force_mode_auto)
 795                                 force_mode = 2;
 796                         break;
 797                 case QCOM_RPM_FORCE_MODE_BYPASS:
 798                         if (vreg->supports_force_mode_bypass)
 799                                 force_mode = 4;
 800                         break;
 801                 }
 802
 803                 if (force_mode == -1) {
 804                         dev_err(&pdev->dev, "invalid force mode\n");
 805                         return -EINVAL;
 806                 }
 807
 808                 ret = rpm_reg_set(vreg, &vreg->parts->fm, force_mode);
 809                 if (ret) {
 810                         dev_err(&pdev->dev, "failed to set force mode\n");
 811                         return ret;
 812                 }
 813         }
 814
 815         config.dev = &pdev->dev;
 816         config.init_data = initdata;
 817         config.driver_data = vreg;
 818         config.of_node = pdev->dev.of_node;
 819         rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config);
 820         if (IS_ERR(rdev)) {
 821                 dev_err(&pdev->dev, "can't register regulator\n");
 822                 return PTR_ERR(rdev);
 823         }
 824
 825         return 0;
 826 }
 827
 828 static struct platform_driver rpm_reg_driver = {
 829         .probe          = rpm_reg_probe,
 830         .driver  = {
 831                 .name  = "qcom_rpm_reg",
 832                 .of_match_table = of_match_ptr(rpm_of_match),
 833         },
 834 };
 835
 836 static int __init rpm_reg_init(void)
 837 {
 838         return platform_driver_register(&rpm_reg_driver);
 839 }
 840 subsys_initcall(rpm_reg_init);
 841
 842 static void __exit rpm_reg_exit(void)
 843 {
 844         platform_driver_unregister(&rpm_reg_driver);
 845 }
 846 module_exit(rpm_reg_exit)
 847
 848 MODULE_DESCRIPTION("Qualcomm RPM regulator driver");
 849 MODULE_LICENSE("GPL v2");