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                        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_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
 104         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
 105
 106 /* Macros for voltage DC/DC converters (BUCKs) */
 107 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array, \
 108                     creg, cmask) \
 109         .desc.id = chip##_ID_##regl_name, \
 110         .desc.name = __stringify(chip##_##regl_name), \
 111         .desc.ops = &da9063_buck_ops, \
 112         .desc.min_uV = (min_mV) * 1000, \
 113         .desc.uV_step = (step_mV) * 1000, \
 114         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
 115         .desc.csel_reg = (creg), \
 116         .desc.csel_mask = (cmask), \
 117         .desc.curr_table = limits_array, \
 118         .desc.n_current_limits = ARRAY_SIZE(limits_array)
 119
 120 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
 121         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
 122         .desc.enable_mask = DA9063_BUCK_EN, \
 123         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
 124         .desc.vsel_mask = DA9063_VBUCK_MASK, \
 125         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
 126         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
 127         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
 128         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
 129         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
 130
 131 /* Defines asignment of regulators info table to chip model */
 132 struct da9063_dev_model {
 133         const struct da9063_regulator_info      *regulator_info;
 134         unsigned                                n_regulators;
 135         enum da9063_type                        type;
 136 };
 137
 138 /* Single regulator settings */
 139 struct da9063_regulator {
 140         struct regulator_desc                   desc;
 141         struct regulator_dev                    *rdev;
 142         struct da9063                           *hw;
 143         const struct da9063_regulator_info      *info;
 144
 145         struct regmap_field                     *mode;
 146         struct regmap_field                     *suspend;
 147         struct regmap_field                     *sleep;
 148         struct regmap_field                     *suspend_sleep;
 149 };
 150
 151 /* Encapsulates all information for the regulators driver */
 152 struct da9063_regulators {
 153         unsigned                                n_regulators;
 154         /* Array size to be defined during init. Keep at end. */
 155         struct da9063_regulator                 regulator[0];
 156 };
 157
 158 /* BUCK modes for DA9063 */
 159 enum {
 160         BUCK_MODE_MANUAL,       /* 0 */
 161         BUCK_MODE_SLEEP,        /* 1 */
 162         BUCK_MODE_SYNC,         /* 2 */
 163         BUCK_MODE_AUTO          /* 3 */
 164 };
 165
 166 /* Regulator operations */
 167
 168 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 169    Entry indexes corresponds to register values. */
 170 static const unsigned int da9063_buck_a_limits[] = {
 171          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 172         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 173 };
 174
 175 /* Current limits array (in uA) for BMEM, BIO, BPERI.
 176    Entry indexes corresponds to register values. */
 177 static const unsigned int da9063_buck_b_limits[] = {
 178         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 179         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 180 };
 181
 182 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
 183    Entry indexes corresponds to register values. */
 184 static const unsigned int da9063_bcores_merged_limits[] = {
 185         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 186         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 187 };
 188
 189 /* Current limits array (in uA) for merged BMEM and BIO.
 190    Entry indexes corresponds to register values. */
 191 static const unsigned int da9063_bmem_bio_merged_limits[] = {
 192         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 193         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 194 };
 195
 196 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
 197 {
 198         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 199         unsigned val;
 200
 201         switch (mode) {
 202         case REGULATOR_MODE_FAST:
 203                 val = BUCK_MODE_SYNC;
 204                 break;
 205         case REGULATOR_MODE_NORMAL:
 206                 val = BUCK_MODE_AUTO;
 207                 break;
 208         case REGULATOR_MODE_STANDBY:
 209                 val = BUCK_MODE_SLEEP;
 210                 break;
 211         default:
 212                 return -EINVAL;
 213         }
 214
 215         return regmap_field_write(regl->mode, val);
 216 }
 217
 218 /*
 219  * Bucks use single mode register field for normal operation
 220  * and suspend state.
 221  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 222  */
 223
 224 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
 225 {
 226         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 227         struct regmap_field *field;
 228         unsigned int val, mode = 0;
 229         int ret;
 230
 231         ret = regmap_field_read(regl->mode, &val);
 232         if (ret < 0)
 233                 return ret;
 234
 235         switch (val) {
 236         default:
 237         case BUCK_MODE_MANUAL:
 238                 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 239                 /* Sleep flag bit decides the mode */
 240                 break;
 241         case BUCK_MODE_SLEEP:
 242                 return REGULATOR_MODE_STANDBY;
 243         case BUCK_MODE_SYNC:
 244                 return REGULATOR_MODE_FAST;
 245         case BUCK_MODE_AUTO:
 246                 return REGULATOR_MODE_NORMAL;
 247         }
 248
 249         /* Detect current regulator state */
 250         ret = regmap_field_read(regl->suspend, &val);
 251         if (ret < 0)
 252                 return 0;
 253
 254         /* Read regulator mode from proper register, depending on state */
 255         if (val)
 256                 field = regl->suspend_sleep;
 257         else
 258                 field = regl->sleep;
 259
 260         ret = regmap_field_read(field, &val);
 261         if (ret < 0)
 262                 return 0;
 263
 264         if (val)
 265                 mode &= REGULATOR_MODE_STANDBY;
 266         else
 267                 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
 268
 269         return mode;
 270 }
 271
 272 /*
 273  * LDOs use sleep flags - one for normal and one for suspend state.
 274  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 275  */
 276
 277 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 278 {
 279         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 280         unsigned val;
 281
 282         switch (mode) {
 283         case REGULATOR_MODE_NORMAL:
 284                 val = 0;
 285                 break;
 286         case REGULATOR_MODE_STANDBY:
 287                 val = 1;
 288                 break;
 289         default:
 290                 return -EINVAL;
 291         }
 292
 293         return regmap_field_write(regl->sleep, val);
 294 }
 295
 296 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 297 {
 298         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 299         struct regmap_field *field;
 300         int ret, val;
 301
 302         /* Detect current regulator state */
 303         ret = regmap_field_read(regl->suspend, &val);
 304         if (ret < 0)
 305                 return 0;
 306
 307         /* Read regulator mode from proper register, depending on state */
 308         if (val)
 309                 field = regl->suspend_sleep;
 310         else
 311                 field = regl->sleep;
 312
 313         ret = regmap_field_read(field, &val);
 314         if (ret < 0)
 315                 return 0;
 316
 317         if (val)
 318                 return REGULATOR_MODE_STANDBY;
 319         else
 320                 return REGULATOR_MODE_NORMAL;
 321 }
 322
 323 static int da9063_buck_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_buck_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_ldo_get_status(struct regulator_dev *rdev)
 341 {
 342         int ret = regulator_is_enabled_regmap(rdev);
 343
 344         if (ret == 0) {
 345                 ret = REGULATOR_STATUS_OFF;
 346         } else if (ret > 0) {
 347                 ret = da9063_ldo_get_mode(rdev);
 348                 if (ret > 0)
 349                         ret = regulator_mode_to_status(ret);
 350                 else if (ret == 0)
 351                         ret = -EIO;
 352         }
 353
 354         return ret;
 355 }
 356
 357 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 358 {
 359         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 360         const struct da9063_regulator_info *rinfo = regl->info;
 361         int ret, sel;
 362
 363         sel = regulator_map_voltage_linear(rdev, uV, uV);
 364         if (sel < 0)
 365                 return sel;
 366
 367         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 368
 369         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 370                                  rdev->desc->vsel_mask, sel);
 371
 372         return ret;
 373 }
 374
 375 static int da9063_suspend_enable(struct regulator_dev *rdev)
 376 {
 377         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 378
 379         return regmap_field_write(regl->suspend, 1);
 380 }
 381
 382 static int da9063_suspend_disable(struct regulator_dev *rdev)
 383 {
 384         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 385
 386         return regmap_field_write(regl->suspend, 0);
 387 }
 388
 389 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 390 {
 391         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 392         int val;
 393
 394         switch (mode) {
 395         case REGULATOR_MODE_FAST:
 396                 val = BUCK_MODE_SYNC;
 397                 break;
 398         case REGULATOR_MODE_NORMAL:
 399                 val = BUCK_MODE_AUTO;
 400                 break;
 401         case REGULATOR_MODE_STANDBY:
 402                 val = BUCK_MODE_SLEEP;
 403                 break;
 404         default:
 405                 return -EINVAL;
 406         }
 407
 408         return regmap_field_write(regl->mode, val);
 409 }
 410
 411 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 412 {
 413         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 414         unsigned val;
 415
 416         switch (mode) {
 417         case REGULATOR_MODE_NORMAL:
 418                 val = 0;
 419                 break;
 420         case REGULATOR_MODE_STANDBY:
 421                 val = 1;
 422                 break;
 423         default:
 424                 return -EINVAL;
 425         }
 426
 427         return regmap_field_write(regl->suspend_sleep, val);
 428 }
 429
 430 static const struct regulator_ops da9063_buck_ops = {
 431         .enable                 = regulator_enable_regmap,
 432         .disable                = regulator_disable_regmap,
 433         .is_enabled             = regulator_is_enabled_regmap,
 434         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 435         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 436         .list_voltage           = regulator_list_voltage_linear,
 437         .set_current_limit      = regulator_set_current_limit_regmap,
 438         .get_current_limit      = regulator_get_current_limit_regmap,
 439         .set_mode               = da9063_buck_set_mode,
 440         .get_mode               = da9063_buck_get_mode,
 441         .get_status             = da9063_buck_get_status,
 442         .set_suspend_voltage    = da9063_set_suspend_voltage,
 443         .set_suspend_enable     = da9063_suspend_enable,
 444         .set_suspend_disable    = da9063_suspend_disable,
 445         .set_suspend_mode       = da9063_buck_set_suspend_mode,
 446 };
 447
 448 static const struct regulator_ops da9063_ldo_ops = {
 449         .enable                 = regulator_enable_regmap,
 450         .disable                = regulator_disable_regmap,
 451         .is_enabled             = regulator_is_enabled_regmap,
 452         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 453         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 454         .list_voltage           = regulator_list_voltage_linear,
 455         .set_mode               = da9063_ldo_set_mode,
 456         .get_mode               = da9063_ldo_get_mode,
 457         .get_status             = da9063_ldo_get_status,
 458         .set_suspend_voltage    = da9063_set_suspend_voltage,
 459         .set_suspend_enable     = da9063_suspend_enable,
 460         .set_suspend_disable    = da9063_suspend_disable,
 461         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 462 };
 463
 464 /* Info of regulators for DA9063 */
 465 static const struct da9063_regulator_info da9063_regulator_info[] = {
 466         {
 467                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 468                             da9063_buck_a_limits,
 469                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 470                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 471                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 472         },
 473         {
 474                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 475                             da9063_buck_a_limits,
 476                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK),
 477                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 478                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 479         },
 480         {
 481                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 482                             da9063_buck_a_limits,
 483                             DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK),
 484                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 485                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 486         },
 487         {
 488                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 489                             da9063_buck_b_limits,
 490                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 491                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 492                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 493         },
 494         {
 495                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 496                             da9063_buck_b_limits,
 497                             DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK),
 498                 DA9063_BUCK_COMMON_FIELDS(BIO),
 499                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 500         },
 501         {
 502                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 503                             da9063_buck_b_limits,
 504                             DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK),
 505                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 506                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 507         },
 508         {
 509                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 510                             da9063_bcores_merged_limits,
 511                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 512                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 513                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 514                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 515         },
 516         {
 517                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 518                             da9063_bmem_bio_merged_limits,
 519                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 520                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 521                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 522                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 523         },
 524         {
 525                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 526                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 527                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 528         },
 529         {
 530                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 531                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 532                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 533         },
 534         {
 535                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 536                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 537                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 538         },
 539         {
 540                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 541                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 542         },
 543         {
 544                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 545                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 546                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 547         },
 548
 549         /* The following LDOs are present only on DA9063, not on DA9063L */
 550         {
 551                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 552                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 553         },
 554         {
 555                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 556                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 557         },
 558         {
 559                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 560                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 561                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 562         },
 563         {
 564                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 565                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 566         },
 567         {
 568                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 569                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 570         },
 571
 572         {
 573                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 574                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 575         },
 576 };
 577
 578 /* Link chip model with regulators info table */
 579 static struct da9063_dev_model regulators_models[] = {
 580         {
 581                 .regulator_info = da9063_regulator_info,
 582                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 583                 .type = PMIC_TYPE_DA9063,
 584         },
 585         {
 586                 .regulator_info = da9063_regulator_info,
 587                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 588                 .type = PMIC_TYPE_DA9063L,
 589         },
 590         { }
 591 };
 592
 593 /* Regulator interrupt handlers */
 594 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 595 {
 596         struct da9063_regulators *regulators = data;
 597         struct da9063 *hw = regulators->regulator[0].hw;
 598         struct da9063_regulator *regl;
 599         int bits, i , ret;
 600
 601         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 602         if (ret < 0)
 603                 return IRQ_NONE;
 604
 605         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 606                 regl = &regulators->regulator[i];
 607                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 608                         continue;
 609
 610                 if (BIT(regl->info->oc_event.lsb) & bits) {
 611                         regulator_lock(regl->rdev);
 612                         regulator_notifier_call_chain(regl->rdev,
 613                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 614                         regulator_unlock(regl->rdev);
 615                 }
 616         }
 617
 618         return IRQ_HANDLED;
 619 }
 620
 621 /*
 622  * Probing and Initialisation functions
 623  */
 624 static const struct regulator_init_data *da9063_get_regulator_initdata(
 625                 const struct da9063_regulators_pdata *regl_pdata, int id)
 626 {
 627         int i;
 628
 629         for (i = 0; i < regl_pdata->n_regulators; i++) {
 630                 if (id == regl_pdata->regulator_data[i].id)
 631                         return regl_pdata->regulator_data[i].initdata;
 632         }
 633
 634         return NULL;
 635 }
 636
 637 static struct of_regulator_match da9063_matches[] = {
 638         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 639         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 640         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 641         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 642         [DA9063_ID_BIO]              = { .name = "bio",             },
 643         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 644         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 645         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 646         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 647         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 648         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 649         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 650         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 651         /* The following LDOs are present only on DA9063, not on DA9063L */
 652         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 653         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 654         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 655         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 656         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 657         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 658 };
 659
 660 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 661                 struct platform_device *pdev,
 662                 struct of_regulator_match **da9063_reg_matches)
 663 {
 664         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 665         struct da9063_regulators_pdata *pdata;
 666         struct da9063_regulator_data *rdata;
 667         struct device_node *node;
 668         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 669         int i, n, num;
 670
 671         if (da9063->type == PMIC_TYPE_DA9063L)
 672                 da9063_matches_len -= 6;
 673
 674         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 675         if (!node) {
 676                 dev_err(&pdev->dev, "Regulators device node not found\n");
 677                 return ERR_PTR(-ENODEV);
 678         }
 679
 680         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 681                                  da9063_matches_len);
 682         of_node_put(node);
 683         if (num < 0) {
 684                 dev_err(&pdev->dev, "Failed to match regulators\n");
 685                 return ERR_PTR(-EINVAL);
 686         }
 687
 688         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 689         if (!pdata)
 690                 return ERR_PTR(-ENOMEM);
 691
 692         pdata->regulator_data = devm_kcalloc(&pdev->dev,
 693                                         num, sizeof(*pdata->regulator_data),
 694                                         GFP_KERNEL);
 695         if (!pdata->regulator_data)
 696                 return ERR_PTR(-ENOMEM);
 697         pdata->n_regulators = num;
 698
 699         n = 0;
 700         for (i = 0; i < da9063_matches_len; i++) {
 701                 if (!da9063_matches[i].init_data)
 702                         continue;
 703
 704                 rdata = &pdata->regulator_data[n];
 705                 rdata->id = i;
 706                 rdata->initdata = da9063_matches[i].init_data;
 707
 708                 n++;
 709         }
 710
 711         *da9063_reg_matches = da9063_matches;
 712         return pdata;
 713 }
 714
 715 static int da9063_regulator_probe(struct platform_device *pdev)
 716 {
 717         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 718         struct of_regulator_match *da9063_reg_matches = NULL;
 719         struct da9063_regulators_pdata *regl_pdata;
 720         const struct da9063_dev_model *model;
 721         struct da9063_regulators *regulators;
 722         struct da9063_regulator *regl;
 723         struct regulator_config config;
 724         bool bcores_merged, bmem_bio_merged;
 725         int id, irq, n, n_regulators, ret, val;
 726
 727         regl_pdata = da9063_parse_regulators_dt(pdev, &da9063_reg_matches);
 728
 729         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 730                 dev_err(&pdev->dev,
 731                         "No regulators defined for the platform\n");
 732                 return -ENODEV;
 733         }
 734
 735         /* Find regulators set for particular device model */
 736         for (model = regulators_models; model->regulator_info; model++) {
 737                 if (model->type == da9063->type)
 738                         break;
 739         }
 740         if (!model->regulator_info) {
 741                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 742                         da9063->type);
 743                 return -ENODEV;
 744         }
 745
 746         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 747         if (ret < 0) {
 748                 dev_err(&pdev->dev,
 749                         "Error while reading BUCKs configuration\n");
 750                 return ret;
 751         }
 752         bcores_merged = val & DA9063_BCORE_MERGE;
 753         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 754
 755         n_regulators = model->n_regulators;
 756         if (bcores_merged)
 757                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 758         else
 759                 n_regulators--;    /* remove BCORES_MERGED */
 760         if (bmem_bio_merged)
 761                 n_regulators -= 2; /* remove BMEM, BIO */
 762         else
 763                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 764
 765         /* Allocate memory required by usable regulators */
 766         regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
 767                                   regulator, n_regulators), GFP_KERNEL);
 768         if (!regulators)
 769                 return -ENOMEM;
 770
 771         regulators->n_regulators = n_regulators;
 772         platform_set_drvdata(pdev, regulators);
 773
 774         /* Register all regulators declared in platform information */
 775         n = 0;
 776         id = 0;
 777         while (n < regulators->n_regulators) {
 778                 /* Skip regulator IDs depending on merge mode configuration */
 779                 switch (id) {
 780                 case DA9063_ID_BCORE1:
 781                 case DA9063_ID_BCORE2:
 782                         if (bcores_merged) {
 783                                 id++;
 784                                 continue;
 785                         }
 786                         break;
 787                 case DA9063_ID_BMEM:
 788                 case DA9063_ID_BIO:
 789                         if (bmem_bio_merged) {
 790                                 id++;
 791                                 continue;
 792                         }
 793                         break;
 794                 case DA9063_ID_BCORES_MERGED:
 795                         if (!bcores_merged) {
 796                                 id++;
 797                                 continue;
 798                         }
 799                         break;
 800                 case DA9063_ID_BMEM_BIO_MERGED:
 801                         if (!bmem_bio_merged) {
 802                                 id++;
 803                                 continue;
 804                         }
 805                         break;
 806                 }
 807
 808                 /* Initialise regulator structure */
 809                 regl = &regulators->regulator[n];
 810                 regl->hw = da9063;
 811                 regl->info = &model->regulator_info[id];
 812                 regl->desc = regl->info->desc;
 813                 regl->desc.type = REGULATOR_VOLTAGE;
 814                 regl->desc.owner = THIS_MODULE;
 815
 816                 if (regl->info->mode.reg) {
 817                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 818                                         da9063->regmap, regl->info->mode);
 819                         if (IS_ERR(regl->mode))
 820                                 return PTR_ERR(regl->mode);
 821                 }
 822
 823                 if (regl->info->suspend.reg) {
 824                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 825                                         da9063->regmap, regl->info->suspend);
 826                         if (IS_ERR(regl->suspend))
 827                                 return PTR_ERR(regl->suspend);
 828                 }
 829
 830                 if (regl->info->sleep.reg) {
 831                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 832                                         da9063->regmap, regl->info->sleep);
 833                         if (IS_ERR(regl->sleep))
 834                                 return PTR_ERR(regl->sleep);
 835                 }
 836
 837                 if (regl->info->suspend_sleep.reg) {
 838                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 839                                         da9063->regmap, regl->info->suspend_sleep);
 840                         if (IS_ERR(regl->suspend_sleep))
 841                                 return PTR_ERR(regl->suspend_sleep);
 842                 }
 843
 844                 /* Register regulator */
 845                 memset(&config, 0, sizeof(config));
 846                 config.dev = &pdev->dev;
 847                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 848                 config.driver_data = regl;
 849                 if (da9063_reg_matches)
 850                         config.of_node = da9063_reg_matches[id].of_node;
 851                 config.regmap = da9063->regmap;
 852                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 853                                                      &config);
 854                 if (IS_ERR(regl->rdev)) {
 855                         dev_err(&pdev->dev,
 856                                 "Failed to register %s regulator\n",
 857                                 regl->desc.name);
 858                         return PTR_ERR(regl->rdev);
 859                 }
 860                 id++;
 861                 n++;
 862         }
 863
 864         /* LDOs overcurrent event support */
 865         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 866         if (irq < 0) {
 867                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
 868                 return irq;
 869         }
 870
 871         ret = devm_request_threaded_irq(&pdev->dev, irq,
 872                                 NULL, da9063_ldo_lim_event,
 873                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 874                                 "LDO_LIM", regulators);
 875         if (ret) {
 876                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 877                 return ret;
 878         }
 879
 880         return 0;
 881 }
 882
 883 static struct platform_driver da9063_regulator_driver = {
 884         .driver = {
 885                 .name = DA9063_DRVNAME_REGULATORS,
 886         },
 887         .probe = da9063_regulator_probe,
 888 };
 889
 890 static int __init da9063_regulator_init(void)
 891 {
 892         return platform_driver_register(&da9063_regulator_driver);
 893 }
 894 subsys_initcall(da9063_regulator_init);
 895
 896 static void __exit da9063_regulator_cleanup(void)
 897 {
 898         platform_driver_unregister(&da9063_regulator_driver);
 899 }
 900 module_exit(da9063_regulator_cleanup);
 901
 902
 903 /* Module information */
 904 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 905 MODULE_DESCRIPTION("DA9063 regulators driver");
 906 MODULE_LICENSE("GPL");
 907 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);