drivers/regulator/da9063-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Regulator driver for DA9063 PMIC series
   4 //
   5 // Copyright 2012 Dialog Semiconductors Ltd.
   6 // Copyright 2013 Philipp Zabel, Pengutronix
   7 //
   8 // Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/err.h>
  14 #include <linux/slab.h>
  15 #include <linux/of.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regmap.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/regulator/of_regulator.h>
  21 #include <linux/mfd/da9063/core.h>
  22 #include <linux/mfd/da9063/registers.h>
  23
  24
  25 /* Definition for registering regmap bit fields using a mask */
  26 #define BFIELD(_reg, _mask) \
  27         REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
  28                 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
  29
  30 /* DA9063 and DA9063L regulator IDs */
  31 enum {
  32         /* BUCKs */
  33         DA9063_ID_BCORE1,
  34         DA9063_ID_BCORE2,
  35         DA9063_ID_BPRO,
  36         DA9063_ID_BMEM,
  37         DA9063_ID_BIO,
  38         DA9063_ID_BPERI,
  39
  40         /* BCORE1 and BCORE2 in merged mode */
  41         DA9063_ID_BCORES_MERGED,
  42         /* BMEM and BIO in merged mode */
  43         DA9063_ID_BMEM_BIO_MERGED,
  44         /* When two BUCKs are merged, they cannot be reused separately */
  45
  46         /* LDOs on both DA9063 and DA9063L */
  47         DA9063_ID_LDO3,
  48         DA9063_ID_LDO7,
  49         DA9063_ID_LDO8,
  50         DA9063_ID_LDO9,
  51         DA9063_ID_LDO11,
  52
  53         /* DA9063-only LDOs */
  54         DA9063_ID_LDO1,
  55         DA9063_ID_LDO2,
  56         DA9063_ID_LDO4,
  57         DA9063_ID_LDO5,
  58         DA9063_ID_LDO6,
  59         DA9063_ID_LDO10,
  60 };
  61
  62 /* Old regulator platform data */
  63 struct da9063_regulator_data {
  64         int                             id;
  65         struct regulator_init_data      *initdata;
  66 };
  67
  68 struct da9063_regulators_pdata {
  69         unsigned int                    n_regulators;
  70         struct da9063_regulator_data    *regulator_data;
  71 };
  72
  73 /* Regulator capabilities and registers description */
  74 struct da9063_regulator_info {
  75         struct regulator_desc desc;
  76
  77         /* DA9063 main register fields */
  78         struct reg_field mode;          /* buck mode of operation */
  79         struct reg_field suspend;
  80         struct reg_field sleep;
  81         struct reg_field suspend_sleep;
  82         unsigned int suspend_vsel_reg;
  83
  84         /* DA9063 event detection bit */
  85         struct reg_field oc_event;
  86 };
  87
  88 /* Macros for LDO */
  89 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
  90         .desc.id = chip##_ID_##regl_name, \
  91         .desc.name = __stringify(chip##_##regl_name), \
  92         .desc.ops = &da9063_ldo_ops, \
  93         .desc.min_uV = (min_mV) * 1000, \
  94         .desc.uV_step = (step_mV) * 1000, \
  95         .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \
  96                 + (DA9063_V##regl_name##_BIAS)), \
  97         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  98         .desc.enable_mask = DA9063_LDO_EN, \
  99         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
 100         .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
 101         .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
 102         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
 103         .suspend = BFIELD(DA9063_REG_##regl_name##_CONT, DA9063_LDO_CONF), \
 104         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
 105         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
 106
 107 /* Macros for voltage DC/DC converters (BUCKs) */
 108 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array, \
 109                     creg, cmask) \
 110         .desc.id = chip##_ID_##regl_name, \
 111         .desc.name = __stringify(chip##_##regl_name), \
 112         .desc.ops = &da9063_buck_ops, \
 113         .desc.min_uV = (min_mV) * 1000, \
 114         .desc.uV_step = (step_mV) * 1000, \
 115         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
 116         .desc.csel_reg = (creg), \
 117         .desc.csel_mask = (cmask), \
 118         .desc.curr_table = limits_array, \
 119         .desc.n_current_limits = ARRAY_SIZE(limits_array)
 120
 121 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
 122         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
 123         .desc.enable_mask = DA9063_BUCK_EN, \
 124         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
 125         .desc.vsel_mask = DA9063_VBUCK_MASK, \
 126         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
 127         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
 128         .suspend = BFIELD(DA9063_REG_##regl_name##_CONT, DA9063_BUCK_CONF), \
 129         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
 130         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
 131         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
 132
 133 /* Defines asignment of regulators info table to chip model */
 134 struct da9063_dev_model {
 135         const struct da9063_regulator_info      *regulator_info;
 136         unsigned int                            n_regulators;
 137         enum da9063_type                        type;
 138 };
 139
 140 /* Single regulator settings */
 141 struct da9063_regulator {
 142         struct regulator_desc                   desc;
 143         struct regulator_dev                    *rdev;
 144         struct da9063                           *hw;
 145         const struct da9063_regulator_info      *info;
 146
 147         struct regmap_field                     *mode;
 148         struct regmap_field                     *suspend;
 149         struct regmap_field                     *sleep;
 150         struct regmap_field                     *suspend_sleep;
 151 };
 152
 153 /* Encapsulates all information for the regulators driver */
 154 struct da9063_regulators {
 155         unsigned int                            n_regulators;
 156         /* Array size to be defined during init. Keep at end. */
 157         struct da9063_regulator                 regulator[];
 158 };
 159
 160 /* BUCK modes for DA9063 */
 161 enum {
 162         BUCK_MODE_MANUAL,       /* 0 */
 163         BUCK_MODE_SLEEP,        /* 1 */
 164         BUCK_MODE_SYNC,         /* 2 */
 165         BUCK_MODE_AUTO          /* 3 */
 166 };
 167
 168 /* Regulator operations */
 169
 170 /*
 171  * Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 172  * Entry indexes corresponds to register values.
 173  */
 174 static const unsigned int da9063_buck_a_limits[] = {
 175          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 176         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 177 };
 178
 179 /*
 180  * Current limits array (in uA) for BMEM, BIO, BPERI.
 181  * Entry indexes corresponds to register values.
 182  */
 183 static const unsigned int da9063_buck_b_limits[] = {
 184         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 185         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 186 };
 187
 188 /*
 189  * Current limits array (in uA) for merged BCORE1 and BCORE2.
 190  * Entry indexes corresponds to register values.
 191  */
 192 static const unsigned int da9063_bcores_merged_limits[] = {
 193         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 194         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 195 };
 196
 197 /*
 198  * Current limits array (in uA) for merged BMEM and BIO.
 199  * Entry indexes corresponds to register values.
 200  */
 201 static const unsigned int da9063_bmem_bio_merged_limits[] = {
 202         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 203         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 204 };
 205
 206 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
 207 {
 208         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 209         unsigned int val;
 210
 211         switch (mode) {
 212         case REGULATOR_MODE_FAST:
 213                 val = BUCK_MODE_SYNC;
 214                 break;
 215         case REGULATOR_MODE_NORMAL:
 216                 val = BUCK_MODE_AUTO;
 217                 break;
 218         case REGULATOR_MODE_STANDBY:
 219                 val = BUCK_MODE_SLEEP;
 220                 break;
 221         default:
 222                 return -EINVAL;
 223         }
 224
 225         return regmap_field_write(regl->mode, val);
 226 }
 227
 228 /*
 229  * Bucks use single mode register field for normal operation
 230  * and suspend state.
 231  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 232  */
 233
 234 static unsigned int da9063_buck_get_mode(struct regulator_dev *rdev)
 235 {
 236         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 237         unsigned int val;
 238         int ret;
 239
 240         ret = regmap_field_read(regl->mode, &val);
 241         if (ret < 0)
 242                 return ret;
 243
 244         switch (val) {
 245         default:
 246         case BUCK_MODE_MANUAL:
 247                 /* Sleep flag bit decides the mode */
 248                 break;
 249         case BUCK_MODE_SLEEP:
 250                 return REGULATOR_MODE_STANDBY;
 251         case BUCK_MODE_SYNC:
 252                 return REGULATOR_MODE_FAST;
 253         case BUCK_MODE_AUTO:
 254                 return REGULATOR_MODE_NORMAL;
 255         }
 256
 257         ret = regmap_field_read(regl->sleep, &val);
 258         if (ret < 0)
 259                 return 0;
 260
 261         if (val)
 262                 return REGULATOR_MODE_STANDBY;
 263         else
 264                 return REGULATOR_MODE_FAST;
 265 }
 266
 267 /*
 268  * LDOs use sleep flags - one for normal and one for suspend state.
 269  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 270  */
 271
 272 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
 273 {
 274         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 275         unsigned int val;
 276
 277         switch (mode) {
 278         case REGULATOR_MODE_NORMAL:
 279                 val = 0;
 280                 break;
 281         case REGULATOR_MODE_STANDBY:
 282                 val = 1;
 283                 break;
 284         default:
 285                 return -EINVAL;
 286         }
 287
 288         return regmap_field_write(regl->sleep, val);
 289 }
 290
 291 static unsigned int da9063_ldo_get_mode(struct regulator_dev *rdev)
 292 {
 293         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 294         int ret, val;
 295
 296         ret = regmap_field_read(regl->sleep, &val);
 297         if (ret < 0)
 298                 return 0;
 299
 300         if (val)
 301                 return REGULATOR_MODE_STANDBY;
 302         else
 303                 return REGULATOR_MODE_NORMAL;
 304 }
 305
 306 static int da9063_buck_get_status(struct regulator_dev *rdev)
 307 {
 308         int ret = regulator_is_enabled_regmap(rdev);
 309
 310         if (ret == 0) {
 311                 ret = REGULATOR_STATUS_OFF;
 312         } else if (ret > 0) {
 313                 ret = da9063_buck_get_mode(rdev);
 314                 if (ret > 0)
 315                         ret = regulator_mode_to_status(ret);
 316                 else if (ret == 0)
 317                         ret = -EIO;
 318         }
 319
 320         return ret;
 321 }
 322
 323 static int da9063_ldo_get_status(struct regulator_dev *rdev)
 324 {
 325         int ret = regulator_is_enabled_regmap(rdev);
 326
 327         if (ret == 0) {
 328                 ret = REGULATOR_STATUS_OFF;
 329         } else if (ret > 0) {
 330                 ret = da9063_ldo_get_mode(rdev);
 331                 if (ret > 0)
 332                         ret = regulator_mode_to_status(ret);
 333                 else if (ret == 0)
 334                         ret = -EIO;
 335         }
 336
 337         return ret;
 338 }
 339
 340 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 341 {
 342         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 343         const struct da9063_regulator_info *rinfo = regl->info;
 344         int ret, sel;
 345
 346         sel = regulator_map_voltage_linear(rdev, uV, uV);
 347         if (sel < 0)
 348                 return sel;
 349
 350         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 351
 352         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 353                                  rdev->desc->vsel_mask, sel);
 354
 355         return ret;
 356 }
 357
 358 static int da9063_suspend_enable(struct regulator_dev *rdev)
 359 {
 360         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 361
 362         return regmap_field_write(regl->suspend, 1);
 363 }
 364
 365 static int da9063_suspend_disable(struct regulator_dev *rdev)
 366 {
 367         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 368
 369         return regmap_field_write(regl->suspend, 0);
 370 }
 371
 372 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev,
 373                                 unsigned int mode)
 374 {
 375         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 376         int val;
 377
 378         switch (mode) {
 379         case REGULATOR_MODE_FAST:
 380                 val = BUCK_MODE_SYNC;
 381                 break;
 382         case REGULATOR_MODE_NORMAL:
 383                 val = BUCK_MODE_AUTO;
 384                 break;
 385         case REGULATOR_MODE_STANDBY:
 386                 val = BUCK_MODE_SLEEP;
 387                 break;
 388         default:
 389                 return -EINVAL;
 390         }
 391
 392         return regmap_field_write(regl->mode, val);
 393 }
 394
 395 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev,
 396                                 unsigned int mode)
 397 {
 398         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 399         unsigned int val;
 400
 401         switch (mode) {
 402         case REGULATOR_MODE_NORMAL:
 403                 val = 0;
 404                 break;
 405         case REGULATOR_MODE_STANDBY:
 406                 val = 1;
 407                 break;
 408         default:
 409                 return -EINVAL;
 410         }
 411
 412         return regmap_field_write(regl->suspend_sleep, val);
 413 }
 414
 415 static unsigned int da9063_get_overdrive_mask(const struct regulator_desc *desc)
 416 {
 417         switch (desc->id) {
 418         case DA9063_ID_BCORES_MERGED:
 419         case DA9063_ID_BCORE1:
 420                 return DA9063_BCORE1_OD;
 421         case DA9063_ID_BCORE2:
 422                 return DA9063_BCORE2_OD;
 423         case DA9063_ID_BPRO:
 424                 return DA9063_BPRO_OD;
 425         default:
 426                 return 0;
 427         }
 428 }
 429
 430 static int da9063_buck_set_limit_set_overdrive(struct regulator_dev *rdev,
 431                                                int min_uA, int max_uA,
 432                                                unsigned int overdrive_mask)
 433 {
 434         /*
 435          * When enabling overdrive, do it before changing the current limit to
 436          * ensure sufficient supply throughout the switch.
 437          */
 438         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 439         int ret;
 440         unsigned int orig_overdrive;
 441
 442         ret = regmap_read(regl->hw->regmap, DA9063_REG_CONFIG_H,
 443                           &orig_overdrive);
 444         if (ret < 0)
 445                 return ret;
 446         orig_overdrive &= overdrive_mask;
 447
 448         if (orig_overdrive == 0) {
 449                 ret = regmap_set_bits(regl->hw->regmap, DA9063_REG_CONFIG_H,
 450                                 overdrive_mask);
 451                 if (ret < 0)
 452                         return ret;
 453         }
 454
 455         ret = regulator_set_current_limit_regmap(rdev, min_uA / 2, max_uA / 2);
 456         if (ret < 0 && orig_overdrive == 0)
 457                 /*
 458                  * regulator_set_current_limit_regmap may have rejected the
 459                  * change because of unusable min_uA and/or max_uA inputs.
 460                  * Attempt to restore original overdrive state, ignore failure-
 461                  * on-failure.
 462                  */
 463                 regmap_clear_bits(regl->hw->regmap, DA9063_REG_CONFIG_H,
 464                                   overdrive_mask);
 465
 466         return ret;
 467 }
 468
 469 static int da9063_buck_set_limit_clear_overdrive(struct regulator_dev *rdev,
 470                                                  int min_uA, int max_uA,
 471                                                  unsigned int overdrive_mask)
 472 {
 473         /*
 474          * When disabling overdrive, do it after changing the current limit to
 475          * ensure sufficient supply throughout the switch.
 476          */
 477         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 478         int ret, orig_limit;
 479
 480         ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &orig_limit);
 481         if (ret < 0)
 482                 return ret;
 483
 484         ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
 485         if (ret < 0)
 486                 return ret;
 487
 488         ret = regmap_clear_bits(regl->hw->regmap, DA9063_REG_CONFIG_H,
 489                                 overdrive_mask);
 490         if (ret < 0)
 491                 /*
 492                  * Attempt to restore original current limit, ignore failure-
 493                  * on-failure.
 494                  */
 495                 regmap_write(rdev->regmap, rdev->desc->csel_reg, orig_limit);
 496
 497         return ret;
 498 }
 499
 500 static int da9063_buck_set_current_limit(struct regulator_dev *rdev,
 501                                          int min_uA, int max_uA)
 502 {
 503         unsigned int overdrive_mask, n_currents;
 504
 505         overdrive_mask = da9063_get_overdrive_mask(rdev->desc);
 506         if (overdrive_mask) {
 507                 n_currents = rdev->desc->n_current_limits;
 508                 if (n_currents == 0)
 509                         return -EINVAL;
 510
 511                 if (max_uA > rdev->desc->curr_table[n_currents - 1])
 512                         return da9063_buck_set_limit_set_overdrive(rdev, min_uA,
 513                                                                    max_uA,
 514                                                                    overdrive_mask);
 515
 516                 return da9063_buck_set_limit_clear_overdrive(rdev, min_uA,
 517                                                              max_uA,
 518                                                              overdrive_mask);
 519         }
 520         return regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
 521 }
 522
 523 static int da9063_buck_get_current_limit(struct regulator_dev *rdev)
 524 {
 525         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 526         int val, ret, limit;
 527         unsigned int mask;
 528
 529         limit = regulator_get_current_limit_regmap(rdev);
 530         if (limit < 0)
 531                 return limit;
 532         mask = da9063_get_overdrive_mask(rdev->desc);
 533         if (mask) {
 534                 ret = regmap_read(regl->hw->regmap, DA9063_REG_CONFIG_H, &val);
 535                 if (ret < 0)
 536                         return ret;
 537                 if (val & mask)
 538                         limit *= 2;
 539         }
 540         return limit;
 541 }
 542
 543 static const struct regulator_ops da9063_buck_ops = {
 544         .enable                 = regulator_enable_regmap,
 545         .disable                = regulator_disable_regmap,
 546         .is_enabled             = regulator_is_enabled_regmap,
 547         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 548         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 549         .list_voltage           = regulator_list_voltage_linear,
 550         .set_current_limit      = da9063_buck_set_current_limit,
 551         .get_current_limit      = da9063_buck_get_current_limit,
 552         .set_mode               = da9063_buck_set_mode,
 553         .get_mode               = da9063_buck_get_mode,
 554         .get_status             = da9063_buck_get_status,
 555         .set_suspend_voltage    = da9063_set_suspend_voltage,
 556         .set_suspend_enable     = da9063_suspend_enable,
 557         .set_suspend_disable    = da9063_suspend_disable,
 558         .set_suspend_mode       = da9063_buck_set_suspend_mode,
 559 };
 560
 561 static const struct regulator_ops da9063_ldo_ops = {
 562         .enable                 = regulator_enable_regmap,
 563         .disable                = regulator_disable_regmap,
 564         .is_enabled             = regulator_is_enabled_regmap,
 565         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 566         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 567         .list_voltage           = regulator_list_voltage_linear,
 568         .set_mode               = da9063_ldo_set_mode,
 569         .get_mode               = da9063_ldo_get_mode,
 570         .get_status             = da9063_ldo_get_status,
 571         .set_suspend_voltage    = da9063_set_suspend_voltage,
 572         .set_suspend_enable     = da9063_suspend_enable,
 573         .set_suspend_disable    = da9063_suspend_disable,
 574         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 575 };
 576
 577 /* Info of regulators for DA9063 */
 578 static const struct da9063_regulator_info da9063_regulator_info[] = {
 579         {
 580                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 581                             da9063_buck_a_limits,
 582                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 583                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 584         },
 585         {
 586                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 587                             da9063_buck_a_limits,
 588                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK),
 589                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 590         },
 591         {
 592                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 593                             da9063_buck_a_limits,
 594                             DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK),
 595                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 596         },
 597         {
 598                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 599                             da9063_buck_b_limits,
 600                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 601                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 602         },
 603         {
 604                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 605                             da9063_buck_b_limits,
 606                             DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK),
 607                 DA9063_BUCK_COMMON_FIELDS(BIO),
 608         },
 609         {
 610                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 611                             da9063_buck_b_limits,
 612                             DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK),
 613                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 614         },
 615         {
 616                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 617                             da9063_bcores_merged_limits,
 618                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 619                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 620                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 621         },
 622         {
 623                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 624                             da9063_bmem_bio_merged_limits,
 625                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 626                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 627                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 628         },
 629         {
 630                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 631                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 632         },
 633         {
 634                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 635                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 636         },
 637         {
 638                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 639                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 640         },
 641         {
 642                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 643         },
 644         {
 645                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 646                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 647         },
 648
 649         /* The following LDOs are present only on DA9063, not on DA9063L */
 650         {
 651                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 652         },
 653         {
 654                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 655         },
 656         {
 657                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 658                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 659         },
 660         {
 661                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 662         },
 663         {
 664                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 665         },
 666
 667         {
 668                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 669         },
 670 };
 671
 672 /* Link chip model with regulators info table */
 673 static struct da9063_dev_model regulators_models[] = {
 674         {
 675                 .regulator_info = da9063_regulator_info,
 676                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 677                 .type = PMIC_TYPE_DA9063,
 678         },
 679         {
 680                 .regulator_info = da9063_regulator_info,
 681                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 682                 .type = PMIC_TYPE_DA9063L,
 683         },
 684         { }
 685 };
 686
 687 /* Regulator interrupt handlers */
 688 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 689 {
 690         struct da9063_regulators *regulators = data;
 691         struct da9063 *hw = regulators->regulator[0].hw;
 692         struct da9063_regulator *regl;
 693         int bits, i, ret;
 694
 695         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 696         if (ret < 0)
 697                 return IRQ_NONE;
 698
 699         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 700                 regl = &regulators->regulator[i];
 701                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 702                         continue;
 703
 704                 if (BIT(regl->info->oc_event.lsb) & bits) {
 705                         regulator_notifier_call_chain(regl->rdev,
 706                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 707                 }
 708         }
 709
 710         return IRQ_HANDLED;
 711 }
 712
 713 /*
 714  * Probing and Initialisation functions
 715  */
 716 static const struct regulator_init_data *da9063_get_regulator_initdata(
 717                 const struct da9063_regulators_pdata *regl_pdata, int id)
 718 {
 719         int i;
 720
 721         for (i = 0; i < regl_pdata->n_regulators; i++) {
 722                 if (id == regl_pdata->regulator_data[i].id)
 723                         return regl_pdata->regulator_data[i].initdata;
 724         }
 725
 726         return NULL;
 727 }
 728
 729 static struct of_regulator_match da9063_matches[] = {
 730         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 731         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 732         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 733         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 734         [DA9063_ID_BIO]              = { .name = "bio",             },
 735         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 736         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 737         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 738         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 739         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 740         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 741         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 742         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 743         /* The following LDOs are present only on DA9063, not on DA9063L */
 744         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 745         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 746         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 747         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 748         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 749         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 750 };
 751
 752 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 753                 struct platform_device *pdev,
 754                 struct of_regulator_match **da9063_reg_matches)
 755 {
 756         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 757         struct da9063_regulators_pdata *pdata;
 758         struct da9063_regulator_data *rdata;
 759         struct device_node *node;
 760         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 761         int i, n, num;
 762
 763         if (da9063->type == PMIC_TYPE_DA9063L)
 764                 da9063_matches_len -= 6;
 765
 766         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 767         if (!node) {
 768                 dev_err(&pdev->dev, "Regulators device node not found\n");
 769                 return ERR_PTR(-ENODEV);
 770         }
 771
 772         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 773                                  da9063_matches_len);
 774         of_node_put(node);
 775         if (num < 0) {
 776                 dev_err(&pdev->dev, "Failed to match regulators\n");
 777                 return ERR_PTR(-EINVAL);
 778         }
 779
 780         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 781         if (!pdata)
 782                 return ERR_PTR(-ENOMEM);
 783
 784         pdata->regulator_data = devm_kcalloc(&pdev->dev,
 785                                         num, sizeof(*pdata->regulator_data),
 786                                         GFP_KERNEL);
 787         if (!pdata->regulator_data)
 788                 return ERR_PTR(-ENOMEM);
 789         pdata->n_regulators = num;
 790
 791         n = 0;
 792         for (i = 0; i < da9063_matches_len; i++) {
 793                 if (!da9063_matches[i].init_data)
 794                         continue;
 795
 796                 rdata = &pdata->regulator_data[n];
 797                 rdata->id = i;
 798                 rdata->initdata = da9063_matches[i].init_data;
 799
 800                 n++;
 801         }
 802
 803         *da9063_reg_matches = da9063_matches;
 804         return pdata;
 805 }
 806
 807 static int da9063_regulator_probe(struct platform_device *pdev)
 808 {
 809         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 810         struct of_regulator_match *da9063_reg_matches = NULL;
 811         struct da9063_regulators_pdata *regl_pdata;
 812         const struct da9063_dev_model *model;
 813         struct da9063_regulators *regulators;
 814         struct da9063_regulator *regl;
 815         struct regulator_config config;
 816         bool bcores_merged, bmem_bio_merged;
 817         int id, irq, n, n_regulators, ret, val;
 818
 819         regl_pdata = da9063_parse_regulators_dt(pdev, &da9063_reg_matches);
 820
 821         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 822                 dev_err(&pdev->dev,
 823                         "No regulators defined for the platform\n");
 824                 return -ENODEV;
 825         }
 826
 827         /* Find regulators set for particular device model */
 828         for (model = regulators_models; model->regulator_info; model++) {
 829                 if (model->type == da9063->type)
 830                         break;
 831         }
 832         if (!model->regulator_info) {
 833                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 834                         da9063->type);
 835                 return -ENODEV;
 836         }
 837
 838         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 839         if (ret < 0) {
 840                 dev_err(&pdev->dev,
 841                         "Error while reading BUCKs configuration\n");
 842                 return ret;
 843         }
 844         bcores_merged = val & DA9063_BCORE_MERGE;
 845         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 846
 847         n_regulators = model->n_regulators;
 848         if (bcores_merged)
 849                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 850         else
 851                 n_regulators--;    /* remove BCORES_MERGED */
 852         if (bmem_bio_merged)
 853                 n_regulators -= 2; /* remove BMEM, BIO */
 854         else
 855                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 856
 857         /* Allocate memory required by usable regulators */
 858         regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
 859                                   regulator, n_regulators), GFP_KERNEL);
 860         if (!regulators)
 861                 return -ENOMEM;
 862
 863         regulators->n_regulators = n_regulators;
 864         platform_set_drvdata(pdev, regulators);
 865
 866         /* Register all regulators declared in platform information */
 867         n = 0;
 868         id = 0;
 869         while (n < regulators->n_regulators) {
 870                 /* Skip regulator IDs depending on merge mode configuration */
 871                 switch (id) {
 872                 case DA9063_ID_BCORE1:
 873                 case DA9063_ID_BCORE2:
 874                         if (bcores_merged) {
 875                                 id++;
 876                                 continue;
 877                         }
 878                         break;
 879                 case DA9063_ID_BMEM:
 880                 case DA9063_ID_BIO:
 881                         if (bmem_bio_merged) {
 882                                 id++;
 883                                 continue;
 884                         }
 885                         break;
 886                 case DA9063_ID_BCORES_MERGED:
 887                         if (!bcores_merged) {
 888                                 id++;
 889                                 continue;
 890                         }
 891                         break;
 892                 case DA9063_ID_BMEM_BIO_MERGED:
 893                         if (!bmem_bio_merged) {
 894                                 id++;
 895                                 continue;
 896                         }
 897                         break;
 898                 }
 899
 900                 /* Initialise regulator structure */
 901                 regl = &regulators->regulator[n];
 902                 regl->hw = da9063;
 903                 regl->info = &model->regulator_info[id];
 904                 regl->desc = regl->info->desc;
 905                 regl->desc.type = REGULATOR_VOLTAGE;
 906                 regl->desc.owner = THIS_MODULE;
 907
 908                 if (regl->info->mode.reg) {
 909                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 910                                         da9063->regmap, regl->info->mode);
 911                         if (IS_ERR(regl->mode))
 912                                 return PTR_ERR(regl->mode);
 913                 }
 914
 915                 if (regl->info->suspend.reg) {
 916                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 917                                         da9063->regmap, regl->info->suspend);
 918                         if (IS_ERR(regl->suspend))
 919                                 return PTR_ERR(regl->suspend);
 920                 }
 921
 922                 if (regl->info->sleep.reg) {
 923                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 924                                         da9063->regmap, regl->info->sleep);
 925                         if (IS_ERR(regl->sleep))
 926                                 return PTR_ERR(regl->sleep);
 927                 }
 928
 929                 if (regl->info->suspend_sleep.reg) {
 930                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 931                                 da9063->regmap, regl->info->suspend_sleep);
 932                         if (IS_ERR(regl->suspend_sleep))
 933                                 return PTR_ERR(regl->suspend_sleep);
 934                 }
 935
 936                 /* Register regulator */
 937                 memset(&config, 0, sizeof(config));
 938                 config.dev = &pdev->dev;
 939                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 940                 config.driver_data = regl;
 941                 if (da9063_reg_matches)
 942                         config.of_node = da9063_reg_matches[id].of_node;
 943                 config.regmap = da9063->regmap;
 944                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 945                                                      &config);
 946                 if (IS_ERR(regl->rdev)) {
 947                         dev_err(&pdev->dev,
 948                                 "Failed to register %s regulator\n",
 949                                 regl->desc.name);
 950                         return PTR_ERR(regl->rdev);
 951                 }
 952                 id++;
 953                 n++;
 954         }
 955
 956         /* LDOs overcurrent event support */
 957         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 958         if (irq < 0)
 959                 return irq;
 960
 961         ret = devm_request_threaded_irq(&pdev->dev, irq,
 962                                 NULL, da9063_ldo_lim_event,
 963                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 964                                 "LDO_LIM", regulators);
 965         if (ret)
 966                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 967
 968         return ret;
 969 }
 970
 971 static struct platform_driver da9063_regulator_driver = {
 972         .driver = {
 973                 .name = DA9063_DRVNAME_REGULATORS,
 974         },
 975         .probe = da9063_regulator_probe,
 976 };
 977
 978 static int __init da9063_regulator_init(void)
 979 {
 980         return platform_driver_register(&da9063_regulator_driver);
 981 }
 982 subsys_initcall(da9063_regulator_init);
 983
 984 static void __exit da9063_regulator_cleanup(void)
 985 {
 986         platform_driver_unregister(&da9063_regulator_driver);
 987 }
 988 module_exit(da9063_regulator_cleanup);
 989
 990
 991 /* Module information */
 992 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 993 MODULE_DESCRIPTION("DA9063 regulators driver");
 994 MODULE_LICENSE("GPL");
 995 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);