drivers/regulator/da9063-regulator.c

   1
   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  *  This program is free software; you can redistribute  it and/or modify it
  11  *  under  the terms of  the GNU General  Public License as published by the
  12  *  Free Software Foundation;  either version 2 of the  License, or (at your
  13  *  option) any later version.
  14  *
  15  */
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/err.h>
  20 #include <linux/slab.h>
  21 #include <linux/of.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/regmap.h>
  24 #include <linux/regulator/driver.h>
  25 #include <linux/regulator/machine.h>
  26 #include <linux/regulator/of_regulator.h>
  27 #include <linux/mfd/da9063/core.h>
  28 #include <linux/mfd/da9063/pdata.h>
  29 #include <linux/mfd/da9063/registers.h>
  30
  31
  32 /* Definition for registering regmap bit fields using a mask */
  33 #define BFIELD(_reg, _mask) \
  34         REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
  35                 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
  36
  37 /* Regulator capabilities and registers description */
  38 struct da9063_regulator_info {
  39         struct regulator_desc desc;
  40
  41         /* Current limiting */
  42         unsigned        n_current_limits;
  43         const int       *current_limits;
  44
  45         /* DA9063 main register fields */
  46         struct reg_field mode;          /* buck mode of operation */
  47         struct reg_field suspend;
  48         struct reg_field sleep;
  49         struct reg_field suspend_sleep;
  50         unsigned int suspend_vsel_reg;
  51         struct reg_field ilimit;
  52
  53         /* DA9063 event detection bit */
  54         struct reg_field oc_event;
  55 };
  56
  57 /* Macros for LDO */
  58 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
  59         .desc.id = chip##_ID_##regl_name, \
  60         .desc.name = __stringify(chip##_##regl_name), \
  61         .desc.ops = &da9063_ldo_ops, \
  62         .desc.min_uV = (min_mV) * 1000, \
  63         .desc.uV_step = (step_mV) * 1000, \
  64         .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \
  65                 + (DA9063_V##regl_name##_BIAS)), \
  66         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  67         .desc.enable_mask = DA9063_LDO_EN, \
  68         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  69         .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
  70         .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
  71         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
  72         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
  73         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
  74
  75 /* Macros for voltage DC/DC converters (BUCKs) */
  76 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
  77         .desc.id = chip##_ID_##regl_name, \
  78         .desc.name = __stringify(chip##_##regl_name), \
  79         .desc.ops = &da9063_buck_ops, \
  80         .desc.min_uV = (min_mV) * 1000, \
  81         .desc.uV_step = (step_mV) * 1000, \
  82         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
  83         .current_limits = limits_array, \
  84         .n_current_limits = ARRAY_SIZE(limits_array)
  85
  86 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
  87         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  88         .desc.enable_mask = DA9063_BUCK_EN, \
  89         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  90         .desc.vsel_mask = DA9063_VBUCK_MASK, \
  91         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
  92         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
  93         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
  94         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
  95         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
  96
  97 /* Defines asignment of regulators info table to chip model */
  98 struct da9063_dev_model {
  99         const struct da9063_regulator_info      *regulator_info;
 100         unsigned                                n_regulators;
 101         unsigned                                dev_model;
 102 };
 103
 104 /* Single regulator settings */
 105 struct da9063_regulator {
 106         struct regulator_desc                   desc;
 107         struct regulator_dev                    *rdev;
 108         struct da9063                           *hw;
 109         const struct da9063_regulator_info      *info;
 110
 111         struct regmap_field                     *mode;
 112         struct regmap_field                     *suspend;
 113         struct regmap_field                     *sleep;
 114         struct regmap_field                     *suspend_sleep;
 115         struct regmap_field                     *ilimit;
 116 };
 117
 118 /* Encapsulates all information for the regulators driver */
 119 struct da9063_regulators {
 120         unsigned                                n_regulators;
 121         /* Array size to be defined during init. Keep at end. */
 122         struct da9063_regulator                 regulator[0];
 123 };
 124
 125 /* BUCK modes for DA9063 */
 126 enum {
 127         BUCK_MODE_MANUAL,       /* 0 */
 128         BUCK_MODE_SLEEP,        /* 1 */
 129         BUCK_MODE_SYNC,         /* 2 */
 130         BUCK_MODE_AUTO          /* 3 */
 131 };
 132
 133 /* Regulator operations */
 134
 135 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 136    Entry indexes corresponds to register values. */
 137 static const int da9063_buck_a_limits[] = {
 138          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 139         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 140 };
 141
 142 /* Current limits array (in uA) for BMEM, BIO, BPERI.
 143    Entry indexes corresponds to register values. */
 144 static const int da9063_buck_b_limits[] = {
 145         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 146         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 147 };
 148
 149 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
 150    Entry indexes corresponds to register values. */
 151 static const int da9063_bcores_merged_limits[] = {
 152         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 153         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 154 };
 155
 156 /* Current limits array (in uA) for merged BMEM and BIO.
 157    Entry indexes corresponds to register values. */
 158 static const int da9063_bmem_bio_merged_limits[] = {
 159         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 160         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 161 };
 162
 163 static int da9063_set_current_limit(struct regulator_dev *rdev,
 164                                                         int min_uA, int max_uA)
 165 {
 166         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 167         const struct da9063_regulator_info *rinfo = regl->info;
 168         int n, tval;
 169
 170         for (n = 0; n < rinfo->n_current_limits; n++) {
 171                 tval = rinfo->current_limits[n];
 172                 if (tval >= min_uA && tval <= max_uA)
 173                         return regmap_field_write(regl->ilimit, n);
 174         }
 175
 176         return -EINVAL;
 177 }
 178
 179 static int da9063_get_current_limit(struct regulator_dev *rdev)
 180 {
 181         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 182         const struct da9063_regulator_info *rinfo = regl->info;
 183         unsigned int sel;
 184         int ret;
 185
 186         ret = regmap_field_read(regl->ilimit, &sel);
 187         if (ret < 0)
 188                 return ret;
 189
 190         if (sel >= rinfo->n_current_limits)
 191                 sel = rinfo->n_current_limits - 1;
 192
 193         return rinfo->current_limits[sel];
 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      = da9063_set_current_limit,
 438         .get_current_limit      = da9063_get_current_limit,
 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_BUCK_COMMON_FIELDS(BCORE1),
 470                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 471                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 472                                  DA9063_BCORE1_ILIM_MASK),
 473         },
 474         {
 475                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 476                             da9063_buck_a_limits),
 477                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 478                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 479                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 480                                  DA9063_BCORE2_ILIM_MASK),
 481         },
 482         {
 483                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 484                             da9063_buck_a_limits),
 485                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 486                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 487                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 488                                  DA9063_BPRO_ILIM_MASK),
 489         },
 490         {
 491                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 492                             da9063_buck_b_limits),
 493                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 494                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 495                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 496                                  DA9063_BMEM_ILIM_MASK),
 497         },
 498         {
 499                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 500                             da9063_buck_b_limits),
 501                 DA9063_BUCK_COMMON_FIELDS(BIO),
 502                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 503                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 504                                  DA9063_BIO_ILIM_MASK),
 505         },
 506         {
 507                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 508                             da9063_buck_b_limits),
 509                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 510                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 511                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 512                                  DA9063_BPERI_ILIM_MASK),
 513         },
 514         {
 515                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 516                             da9063_bcores_merged_limits),
 517                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 518                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 519                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 520                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 521                                  DA9063_BCORE1_ILIM_MASK),
 522         },
 523         {
 524                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 525                             da9063_bmem_bio_merged_limits),
 526                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 527                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 528                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 529                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 530                                  DA9063_BMEM_ILIM_MASK),
 531         },
 532         {
 533                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 534                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 535         },
 536         {
 537                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 538                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 539         },
 540         {
 541                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 542                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 543                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 544         },
 545         {
 546                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 547                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 548                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 549         },
 550         {
 551                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 552                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 553         },
 554         {
 555                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 556                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 557         },
 558         {
 559                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 560                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 561                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 562         },
 563         {
 564                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 565                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 566                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 567         },
 568         {
 569                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 570                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 571         },
 572         {
 573                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 574                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 575         },
 576         {
 577                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 578                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 579                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 580         },
 581 };
 582
 583 /* Link chip model with regulators info table */
 584 static struct da9063_dev_model regulators_models[] = {
 585         {
 586                 .regulator_info = da9063_regulator_info,
 587                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 588                 .dev_model = PMIC_DA9063,
 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_notifier_call_chain(regl->rdev,
 612                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 613         }
 614
 615         return IRQ_HANDLED;
 616 }
 617
 618 /*
 619  * Probing and Initialisation functions
 620  */
 621 static const struct regulator_init_data *da9063_get_regulator_initdata(
 622                 const struct da9063_regulators_pdata *regl_pdata, int id)
 623 {
 624         int i;
 625
 626         for (i = 0; i < regl_pdata->n_regulators; i++) {
 627                 if (id == regl_pdata->regulator_data[i].id)
 628                         return regl_pdata->regulator_data[i].initdata;
 629         }
 630
 631         return NULL;
 632 }
 633
 634 #ifdef CONFIG_OF
 635 static struct of_regulator_match da9063_matches[] = {
 636         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 637         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 638         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 639         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 640         [DA9063_ID_BIO]              = { .name = "bio",             },
 641         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 642         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 643         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 644         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 645         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 646         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 647         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 648         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 649         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 650         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 651         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 652         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 653         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 654         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 655 };
 656
 657 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 658                 struct platform_device *pdev,
 659                 struct of_regulator_match **da9063_reg_matches)
 660 {
 661         struct da9063_regulators_pdata *pdata;
 662         struct da9063_regulator_data *rdata;
 663         struct device_node *node;
 664         int i, n, num;
 665
 666         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 667         if (!node) {
 668                 dev_err(&pdev->dev, "Regulators device node not found\n");
 669                 return ERR_PTR(-ENODEV);
 670         }
 671
 672         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 673                                  ARRAY_SIZE(da9063_matches));
 674         of_node_put(node);
 675         if (num < 0) {
 676                 dev_err(&pdev->dev, "Failed to match regulators\n");
 677                 return ERR_PTR(-EINVAL);
 678         }
 679
 680         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 681         if (!pdata)
 682                 return ERR_PTR(-ENOMEM);
 683
 684         pdata->regulator_data = devm_kzalloc(&pdev->dev,
 685                                         num * sizeof(*pdata->regulator_data),
 686                                         GFP_KERNEL);
 687         if (!pdata->regulator_data)
 688                 return ERR_PTR(-ENOMEM);
 689         pdata->n_regulators = num;
 690
 691         n = 0;
 692         for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
 693                 if (!da9063_matches[i].init_data)
 694                         continue;
 695
 696                 rdata = &pdata->regulator_data[n];
 697                 rdata->id = i;
 698                 rdata->initdata = da9063_matches[i].init_data;
 699
 700                 n++;
 701         }
 702
 703         *da9063_reg_matches = da9063_matches;
 704         return pdata;
 705 }
 706 #else
 707 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 708                 struct platform_device *pdev,
 709                 struct of_regulator_match **da9063_reg_matches)
 710 {
 711         *da9063_reg_matches = NULL;
 712         return ERR_PTR(-ENODEV);
 713 }
 714 #endif
 715
 716 static int da9063_regulator_probe(struct platform_device *pdev)
 717 {
 718         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 719         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
 720         struct of_regulator_match *da9063_reg_matches = NULL;
 721         struct da9063_regulators_pdata *regl_pdata;
 722         const struct da9063_dev_model *model;
 723         struct da9063_regulators *regulators;
 724         struct da9063_regulator *regl;
 725         struct regulator_config config;
 726         bool bcores_merged, bmem_bio_merged;
 727         int id, irq, n, n_regulators, ret, val;
 728         size_t size;
 729
 730         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
 731
 732         if (!regl_pdata)
 733                 regl_pdata = da9063_parse_regulators_dt(pdev,
 734                                                         &da9063_reg_matches);
 735
 736         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 737                 dev_err(&pdev->dev,
 738                         "No regulators defined for the platform\n");
 739                 return -ENODEV;
 740         }
 741
 742         /* Find regulators set for particular device model */
 743         for (model = regulators_models; model->regulator_info; model++) {
 744                 if (model->dev_model == da9063->model)
 745                         break;
 746         }
 747         if (!model->regulator_info) {
 748                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 749                         da9063->model);
 750                 return -ENODEV;
 751         }
 752
 753         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 754         if (ret < 0) {
 755                 dev_err(&pdev->dev,
 756                         "Error while reading BUCKs configuration\n");
 757                 return ret;
 758         }
 759         bcores_merged = val & DA9063_BCORE_MERGE;
 760         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 761
 762         n_regulators = model->n_regulators;
 763         if (bcores_merged)
 764                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 765         else
 766                 n_regulators--;    /* remove BCORES_MERGED */
 767         if (bmem_bio_merged)
 768                 n_regulators -= 2; /* remove BMEM, BIO */
 769         else
 770                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 771
 772         /* Allocate memory required by usable regulators */
 773         size = sizeof(struct da9063_regulators) +
 774                 n_regulators * sizeof(struct da9063_regulator);
 775         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 776         if (!regulators)
 777                 return -ENOMEM;
 778
 779         regulators->n_regulators = n_regulators;
 780         platform_set_drvdata(pdev, regulators);
 781
 782         /* Register all regulators declared in platform information */
 783         n = 0;
 784         id = 0;
 785         while (n < regulators->n_regulators) {
 786                 /* Skip regulator IDs depending on merge mode configuration */
 787                 switch (id) {
 788                 case DA9063_ID_BCORE1:
 789                 case DA9063_ID_BCORE2:
 790                         if (bcores_merged) {
 791                                 id++;
 792                                 continue;
 793                         }
 794                         break;
 795                 case DA9063_ID_BMEM:
 796                 case DA9063_ID_BIO:
 797                         if (bmem_bio_merged) {
 798                                 id++;
 799                                 continue;
 800                         }
 801                         break;
 802                 case DA9063_ID_BCORES_MERGED:
 803                         if (!bcores_merged) {
 804                                 id++;
 805                                 continue;
 806                         }
 807                         break;
 808                 case DA9063_ID_BMEM_BIO_MERGED:
 809                         if (!bmem_bio_merged) {
 810                                 id++;
 811                                 continue;
 812                         }
 813                         break;
 814                 }
 815
 816                 /* Initialise regulator structure */
 817                 regl = &regulators->regulator[n];
 818                 regl->hw = da9063;
 819                 regl->info = &model->regulator_info[id];
 820                 regl->desc = regl->info->desc;
 821                 regl->desc.type = REGULATOR_VOLTAGE;
 822                 regl->desc.owner = THIS_MODULE;
 823
 824                 if (regl->info->mode.reg)
 825                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 826                                         da9063->regmap, regl->info->mode);
 827                 if (regl->info->suspend.reg)
 828                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 829                                         da9063->regmap, regl->info->suspend);
 830                 if (regl->info->sleep.reg)
 831                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 832                                         da9063->regmap, regl->info->sleep);
 833                 if (regl->info->suspend_sleep.reg)
 834                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 835                                         da9063->regmap, regl->info->suspend_sleep);
 836                 if (regl->info->ilimit.reg)
 837                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
 838                                         da9063->regmap, regl->info->ilimit);
 839
 840                 /* Register regulator */
 841                 memset(&config, 0, sizeof(config));
 842                 config.dev = &pdev->dev;
 843                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 844                 config.driver_data = regl;
 845                 if (da9063_reg_matches)
 846                         config.of_node = da9063_reg_matches[id].of_node;
 847                 config.regmap = da9063->regmap;
 848                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 849                                                      &config);
 850                 if (IS_ERR(regl->rdev)) {
 851                         dev_err(&pdev->dev,
 852                                 "Failed to register %s regulator\n",
 853                                 regl->desc.name);
 854                         return PTR_ERR(regl->rdev);
 855                 }
 856                 id++;
 857                 n++;
 858         }
 859
 860         /* LDOs overcurrent event support */
 861         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 862         if (irq < 0) {
 863                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
 864                 return irq;
 865         }
 866
 867         ret = devm_request_threaded_irq(&pdev->dev, irq,
 868                                 NULL, da9063_ldo_lim_event,
 869                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 870                                 "LDO_LIM", regulators);
 871         if (ret) {
 872                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 873                 return ret;
 874         }
 875
 876         return 0;
 877 }
 878
 879 static struct platform_driver da9063_regulator_driver = {
 880         .driver = {
 881                 .name = DA9063_DRVNAME_REGULATORS,
 882         },
 883         .probe = da9063_regulator_probe,
 884 };
 885
 886 static int __init da9063_regulator_init(void)
 887 {
 888         return platform_driver_register(&da9063_regulator_driver);
 889 }
 890 subsys_initcall(da9063_regulator_init);
 891
 892 static void __exit da9063_regulator_cleanup(void)
 893 {
 894         platform_driver_unregister(&da9063_regulator_driver);
 895 }
 896 module_exit(da9063_regulator_cleanup);
 897
 898
 899 /* Module information */
 900 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 901 MODULE_DESCRIPTION("DA9063 regulators driver");
 902 MODULE_LICENSE("GPL");
 903 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);