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 const struct regulator_ops da9063_buck_ops = {
 416         .enable                 = regulator_enable_regmap,
 417         .disable                = regulator_disable_regmap,
 418         .is_enabled             = regulator_is_enabled_regmap,
 419         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 420         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 421         .list_voltage           = regulator_list_voltage_linear,
 422         .set_current_limit      = regulator_set_current_limit_regmap,
 423         .get_current_limit      = regulator_get_current_limit_regmap,
 424         .set_mode               = da9063_buck_set_mode,
 425         .get_mode               = da9063_buck_get_mode,
 426         .get_status             = da9063_buck_get_status,
 427         .set_suspend_voltage    = da9063_set_suspend_voltage,
 428         .set_suspend_enable     = da9063_suspend_enable,
 429         .set_suspend_disable    = da9063_suspend_disable,
 430         .set_suspend_mode       = da9063_buck_set_suspend_mode,
 431 };
 432
 433 static const struct regulator_ops da9063_ldo_ops = {
 434         .enable                 = regulator_enable_regmap,
 435         .disable                = regulator_disable_regmap,
 436         .is_enabled             = regulator_is_enabled_regmap,
 437         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 438         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 439         .list_voltage           = regulator_list_voltage_linear,
 440         .set_mode               = da9063_ldo_set_mode,
 441         .get_mode               = da9063_ldo_get_mode,
 442         .get_status             = da9063_ldo_get_status,
 443         .set_suspend_voltage    = da9063_set_suspend_voltage,
 444         .set_suspend_enable     = da9063_suspend_enable,
 445         .set_suspend_disable    = da9063_suspend_disable,
 446         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 447 };
 448
 449 /* Info of regulators for DA9063 */
 450 static const struct da9063_regulator_info da9063_regulator_info[] = {
 451         {
 452                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 453                             da9063_buck_a_limits,
 454                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 455                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 456         },
 457         {
 458                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 459                             da9063_buck_a_limits,
 460                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK),
 461                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 462         },
 463         {
 464                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 465                             da9063_buck_a_limits,
 466                             DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK),
 467                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 468         },
 469         {
 470                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 471                             da9063_buck_b_limits,
 472                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 473                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 474         },
 475         {
 476                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 477                             da9063_buck_b_limits,
 478                             DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK),
 479                 DA9063_BUCK_COMMON_FIELDS(BIO),
 480         },
 481         {
 482                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 483                             da9063_buck_b_limits,
 484                             DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK),
 485                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 486         },
 487         {
 488                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 489                             da9063_bcores_merged_limits,
 490                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 491                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 492                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 493         },
 494         {
 495                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 496                             da9063_bmem_bio_merged_limits,
 497                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 498                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 499                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 500         },
 501         {
 502                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 503                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 504         },
 505         {
 506                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 507                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 508         },
 509         {
 510                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 511                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 512         },
 513         {
 514                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 515                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 516         },
 517         {
 518                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 519                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 520         },
 521
 522         /* The following LDOs are present only on DA9063, not on DA9063L */
 523         {
 524                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 525         },
 526         {
 527                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 528         },
 529         {
 530                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 531                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 532         },
 533         {
 534                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 535         },
 536         {
 537                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 538         },
 539
 540         {
 541                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 542         },
 543 };
 544
 545 /* Link chip model with regulators info table */
 546 static struct da9063_dev_model regulators_models[] = {
 547         {
 548                 .regulator_info = da9063_regulator_info,
 549                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 550                 .type = PMIC_TYPE_DA9063,
 551         },
 552         {
 553                 .regulator_info = da9063_regulator_info,
 554                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 555                 .type = PMIC_TYPE_DA9063L,
 556         },
 557         { }
 558 };
 559
 560 /* Regulator interrupt handlers */
 561 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 562 {
 563         struct da9063_regulators *regulators = data;
 564         struct da9063 *hw = regulators->regulator[0].hw;
 565         struct da9063_regulator *regl;
 566         int bits, i, ret;
 567
 568         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 569         if (ret < 0)
 570                 return IRQ_NONE;
 571
 572         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 573                 regl = &regulators->regulator[i];
 574                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 575                         continue;
 576
 577                 if (BIT(regl->info->oc_event.lsb) & bits) {
 578                         regulator_lock(regl->rdev);
 579                         regulator_notifier_call_chain(regl->rdev,
 580                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 581                         regulator_unlock(regl->rdev);
 582                 }
 583         }
 584
 585         return IRQ_HANDLED;
 586 }
 587
 588 /*
 589  * Probing and Initialisation functions
 590  */
 591 static const struct regulator_init_data *da9063_get_regulator_initdata(
 592                 const struct da9063_regulators_pdata *regl_pdata, int id)
 593 {
 594         int i;
 595
 596         for (i = 0; i < regl_pdata->n_regulators; i++) {
 597                 if (id == regl_pdata->regulator_data[i].id)
 598                         return regl_pdata->regulator_data[i].initdata;
 599         }
 600
 601         return NULL;
 602 }
 603
 604 static struct of_regulator_match da9063_matches[] = {
 605         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 606         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 607         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 608         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 609         [DA9063_ID_BIO]              = { .name = "bio",             },
 610         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 611         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 612         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 613         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 614         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 615         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 616         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 617         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 618         /* The following LDOs are present only on DA9063, not on DA9063L */
 619         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 620         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 621         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 622         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 623         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 624         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 625 };
 626
 627 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 628                 struct platform_device *pdev,
 629                 struct of_regulator_match **da9063_reg_matches)
 630 {
 631         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 632         struct da9063_regulators_pdata *pdata;
 633         struct da9063_regulator_data *rdata;
 634         struct device_node *node;
 635         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 636         int i, n, num;
 637
 638         if (da9063->type == PMIC_TYPE_DA9063L)
 639                 da9063_matches_len -= 6;
 640
 641         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 642         if (!node) {
 643                 dev_err(&pdev->dev, "Regulators device node not found\n");
 644                 return ERR_PTR(-ENODEV);
 645         }
 646
 647         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 648                                  da9063_matches_len);
 649         of_node_put(node);
 650         if (num < 0) {
 651                 dev_err(&pdev->dev, "Failed to match regulators\n");
 652                 return ERR_PTR(-EINVAL);
 653         }
 654
 655         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 656         if (!pdata)
 657                 return ERR_PTR(-ENOMEM);
 658
 659         pdata->regulator_data = devm_kcalloc(&pdev->dev,
 660                                         num, sizeof(*pdata->regulator_data),
 661                                         GFP_KERNEL);
 662         if (!pdata->regulator_data)
 663                 return ERR_PTR(-ENOMEM);
 664         pdata->n_regulators = num;
 665
 666         n = 0;
 667         for (i = 0; i < da9063_matches_len; i++) {
 668                 if (!da9063_matches[i].init_data)
 669                         continue;
 670
 671                 rdata = &pdata->regulator_data[n];
 672                 rdata->id = i;
 673                 rdata->initdata = da9063_matches[i].init_data;
 674
 675                 n++;
 676         }
 677
 678         *da9063_reg_matches = da9063_matches;
 679         return pdata;
 680 }
 681
 682 static int da9063_regulator_probe(struct platform_device *pdev)
 683 {
 684         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 685         struct of_regulator_match *da9063_reg_matches = NULL;
 686         struct da9063_regulators_pdata *regl_pdata;
 687         const struct da9063_dev_model *model;
 688         struct da9063_regulators *regulators;
 689         struct da9063_regulator *regl;
 690         struct regulator_config config;
 691         bool bcores_merged, bmem_bio_merged;
 692         int id, irq, n, n_regulators, ret, val;
 693
 694         regl_pdata = da9063_parse_regulators_dt(pdev, &da9063_reg_matches);
 695
 696         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 697                 dev_err(&pdev->dev,
 698                         "No regulators defined for the platform\n");
 699                 return -ENODEV;
 700         }
 701
 702         /* Find regulators set for particular device model */
 703         for (model = regulators_models; model->regulator_info; model++) {
 704                 if (model->type == da9063->type)
 705                         break;
 706         }
 707         if (!model->regulator_info) {
 708                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 709                         da9063->type);
 710                 return -ENODEV;
 711         }
 712
 713         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 714         if (ret < 0) {
 715                 dev_err(&pdev->dev,
 716                         "Error while reading BUCKs configuration\n");
 717                 return ret;
 718         }
 719         bcores_merged = val & DA9063_BCORE_MERGE;
 720         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 721
 722         n_regulators = model->n_regulators;
 723         if (bcores_merged)
 724                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 725         else
 726                 n_regulators--;    /* remove BCORES_MERGED */
 727         if (bmem_bio_merged)
 728                 n_regulators -= 2; /* remove BMEM, BIO */
 729         else
 730                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 731
 732         /* Allocate memory required by usable regulators */
 733         regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
 734                                   regulator, n_regulators), GFP_KERNEL);
 735         if (!regulators)
 736                 return -ENOMEM;
 737
 738         regulators->n_regulators = n_regulators;
 739         platform_set_drvdata(pdev, regulators);
 740
 741         /* Register all regulators declared in platform information */
 742         n = 0;
 743         id = 0;
 744         while (n < regulators->n_regulators) {
 745                 /* Skip regulator IDs depending on merge mode configuration */
 746                 switch (id) {
 747                 case DA9063_ID_BCORE1:
 748                 case DA9063_ID_BCORE2:
 749                         if (bcores_merged) {
 750                                 id++;
 751                                 continue;
 752                         }
 753                         break;
 754                 case DA9063_ID_BMEM:
 755                 case DA9063_ID_BIO:
 756                         if (bmem_bio_merged) {
 757                                 id++;
 758                                 continue;
 759                         }
 760                         break;
 761                 case DA9063_ID_BCORES_MERGED:
 762                         if (!bcores_merged) {
 763                                 id++;
 764                                 continue;
 765                         }
 766                         break;
 767                 case DA9063_ID_BMEM_BIO_MERGED:
 768                         if (!bmem_bio_merged) {
 769                                 id++;
 770                                 continue;
 771                         }
 772                         break;
 773                 }
 774
 775                 /* Initialise regulator structure */
 776                 regl = &regulators->regulator[n];
 777                 regl->hw = da9063;
 778                 regl->info = &model->regulator_info[id];
 779                 regl->desc = regl->info->desc;
 780                 regl->desc.type = REGULATOR_VOLTAGE;
 781                 regl->desc.owner = THIS_MODULE;
 782
 783                 if (regl->info->mode.reg) {
 784                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 785                                         da9063->regmap, regl->info->mode);
 786                         if (IS_ERR(regl->mode))
 787                                 return PTR_ERR(regl->mode);
 788                 }
 789
 790                 if (regl->info->suspend.reg) {
 791                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 792                                         da9063->regmap, regl->info->suspend);
 793                         if (IS_ERR(regl->suspend))
 794                                 return PTR_ERR(regl->suspend);
 795                 }
 796
 797                 if (regl->info->sleep.reg) {
 798                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 799                                         da9063->regmap, regl->info->sleep);
 800                         if (IS_ERR(regl->sleep))
 801                                 return PTR_ERR(regl->sleep);
 802                 }
 803
 804                 if (regl->info->suspend_sleep.reg) {
 805                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 806                                 da9063->regmap, regl->info->suspend_sleep);
 807                         if (IS_ERR(regl->suspend_sleep))
 808                                 return PTR_ERR(regl->suspend_sleep);
 809                 }
 810
 811                 /* Register regulator */
 812                 memset(&config, 0, sizeof(config));
 813                 config.dev = &pdev->dev;
 814                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 815                 config.driver_data = regl;
 816                 if (da9063_reg_matches)
 817                         config.of_node = da9063_reg_matches[id].of_node;
 818                 config.regmap = da9063->regmap;
 819                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 820                                                      &config);
 821                 if (IS_ERR(regl->rdev)) {
 822                         dev_err(&pdev->dev,
 823                                 "Failed to register %s regulator\n",
 824                                 regl->desc.name);
 825                         return PTR_ERR(regl->rdev);
 826                 }
 827                 id++;
 828                 n++;
 829         }
 830
 831         /* LDOs overcurrent event support */
 832         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 833         if (irq < 0)
 834                 return irq;
 835
 836         ret = devm_request_threaded_irq(&pdev->dev, irq,
 837                                 NULL, da9063_ldo_lim_event,
 838                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 839                                 "LDO_LIM", regulators);
 840         if (ret)
 841                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 842
 843         return ret;
 844 }
 845
 846 static struct platform_driver da9063_regulator_driver = {
 847         .driver = {
 848                 .name = DA9063_DRVNAME_REGULATORS,
 849         },
 850         .probe = da9063_regulator_probe,
 851 };
 852
 853 static int __init da9063_regulator_init(void)
 854 {
 855         return platform_driver_register(&da9063_regulator_driver);
 856 }
 857 subsys_initcall(da9063_regulator_init);
 858
 859 static void __exit da9063_regulator_cleanup(void)
 860 {
 861         platform_driver_unregister(&da9063_regulator_driver);
 862 }
 863 module_exit(da9063_regulator_cleanup);
 864
 865
 866 /* Module information */
 867 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 868 MODULE_DESCRIPTION("DA9063 regulators driver");
 869 MODULE_LICENSE("GPL");
 870 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);