drivers/regulator/da9063-regulator.c

   1 /*
   2  * Regulator driver for DA9063 PMIC series
   3  *
   4  * Copyright 2012 Dialog Semiconductors Ltd.
   5  * Copyright 2013 Philipp Zabel, Pengutronix
   6  *
   7  * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  */
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/err.h>
  19 #include <linux/slab.h>
  20 #include <linux/of.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regmap.h>
  23 #include <linux/regulator/driver.h>
  24 #include <linux/regulator/machine.h>
  25 #include <linux/regulator/of_regulator.h>
  26 #include <linux/mfd/da9063/core.h>
  27 #include <linux/mfd/da9063/pdata.h>
  28 #include <linux/mfd/da9063/registers.h>
  29
  30
  31 /* Definition for registering regmap bit fields using a mask */
  32 #define BFIELD(_reg, _mask) \
  33         REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
  34                 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
  35
  36 /* Regulator capabilities and registers description */
  37 struct da9063_regulator_info {
  38         struct regulator_desc desc;
  39
  40         /* Current limiting */
  41         unsigned        n_current_limits;
  42         const int       *current_limits;
  43
  44         /* DA9063 main register fields */
  45         struct reg_field mode;          /* buck mode of operation */
  46         struct reg_field suspend;
  47         struct reg_field sleep;
  48         struct reg_field suspend_sleep;
  49         unsigned int suspend_vsel_reg;
  50         struct reg_field ilimit;
  51
  52         /* DA9063 event detection bit */
  53         struct reg_field oc_event;
  54 };
  55
  56 /* Macros for LDO */
  57 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
  58         .desc.id = chip##_ID_##regl_name, \
  59         .desc.name = __stringify(chip##_##regl_name), \
  60         .desc.ops = &da9063_ldo_ops, \
  61         .desc.min_uV = (min_mV) * 1000, \
  62         .desc.uV_step = (step_mV) * 1000, \
  63         .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1), \
  64         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  65         .desc.enable_mask = DA9063_LDO_EN, \
  66         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  67         .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
  68         .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
  69         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
  70         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
  71         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
  72
  73 /* Macros for voltage DC/DC converters (BUCKs) */
  74 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
  75         .desc.id = chip##_ID_##regl_name, \
  76         .desc.name = __stringify(chip##_##regl_name), \
  77         .desc.ops = &da9063_buck_ops, \
  78         .desc.min_uV = (min_mV) * 1000, \
  79         .desc.uV_step = (step_mV) * 1000, \
  80         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
  81         .current_limits = limits_array, \
  82         .n_current_limits = ARRAY_SIZE(limits_array)
  83
  84 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
  85         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  86         .desc.enable_mask = DA9063_BUCK_EN, \
  87         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  88         .desc.vsel_mask = DA9063_VBUCK_MASK, \
  89         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
  90         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
  91         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
  92         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
  93         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
  94
  95 /* Defines asignment of regulators info table to chip model */
  96 struct da9063_dev_model {
  97         const struct da9063_regulator_info      *regulator_info;
  98         unsigned                                n_regulators;
  99         unsigned                                dev_model;
 100 };
 101
 102 /* Single regulator settings */
 103 struct da9063_regulator {
 104         struct regulator_desc                   desc;
 105         struct regulator_dev                    *rdev;
 106         struct da9063                           *hw;
 107         const struct da9063_regulator_info      *info;
 108
 109         struct regmap_field                     *mode;
 110         struct regmap_field                     *suspend;
 111         struct regmap_field                     *sleep;
 112         struct regmap_field                     *suspend_sleep;
 113         struct regmap_field                     *ilimit;
 114 };
 115
 116 /* Encapsulates all information for the regulators driver */
 117 struct da9063_regulators {
 118         int                                     irq_ldo_lim;
 119         int                                     irq_uvov;
 120
 121         unsigned                                n_regulators;
 122         /* Array size to be defined during init. Keep at end. */
 123         struct da9063_regulator                 regulator[0];
 124 };
 125
 126 /* BUCK modes for DA9063 */
 127 enum {
 128         BUCK_MODE_MANUAL,       /* 0 */
 129         BUCK_MODE_SLEEP,        /* 1 */
 130         BUCK_MODE_SYNC,         /* 2 */
 131         BUCK_MODE_AUTO          /* 3 */
 132 };
 133
 134 /* Regulator operations */
 135
 136 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 137    Entry indexes corresponds to register values. */
 138 static const int da9063_buck_a_limits[] = {
 139          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 140         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 141 };
 142
 143 /* Current limits array (in uA) for BMEM, BIO, BPERI.
 144    Entry indexes corresponds to register values. */
 145 static const int da9063_buck_b_limits[] = {
 146         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 147         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 148 };
 149
 150 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
 151    Entry indexes corresponds to register values. */
 152 static const int da9063_bcores_merged_limits[] = {
 153         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 154         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 155 };
 156
 157 /* Current limits array (in uA) for merged BMEM and BIO.
 158    Entry indexes corresponds to register values. */
 159 static const int da9063_bmem_bio_merged_limits[] = {
 160         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 161         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 162 };
 163
 164 static int da9063_set_current_limit(struct regulator_dev *rdev,
 165                                                         int min_uA, int max_uA)
 166 {
 167         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 168         const struct da9063_regulator_info *rinfo = regl->info;
 169         int n, tval;
 170
 171         for (n = 0; n < rinfo->n_current_limits; n++) {
 172                 tval = rinfo->current_limits[n];
 173                 if (tval >= min_uA && tval <= max_uA)
 174                         return regmap_field_write(regl->ilimit, n);
 175         }
 176
 177         return -EINVAL;
 178 }
 179
 180 static int da9063_get_current_limit(struct regulator_dev *rdev)
 181 {
 182         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 183         const struct da9063_regulator_info *rinfo = regl->info;
 184         unsigned int sel;
 185         int ret;
 186
 187         ret = regmap_field_read(regl->ilimit, &sel);
 188         if (ret < 0)
 189                 return ret;
 190
 191         if (sel >= rinfo->n_current_limits)
 192                 sel = rinfo->n_current_limits - 1;
 193
 194         return rinfo->current_limits[sel];
 195 }
 196
 197 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
 198 {
 199         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 200         unsigned val;
 201
 202         switch (mode) {
 203         case REGULATOR_MODE_FAST:
 204                 val = BUCK_MODE_SYNC;
 205                 break;
 206         case REGULATOR_MODE_NORMAL:
 207                 val = BUCK_MODE_AUTO;
 208                 break;
 209         case REGULATOR_MODE_STANDBY:
 210                 val = BUCK_MODE_SLEEP;
 211                 break;
 212         default:
 213                 return -EINVAL;
 214         }
 215
 216         return regmap_field_write(regl->mode, val);
 217 }
 218
 219 /*
 220  * Bucks use single mode register field for normal operation
 221  * and suspend state.
 222  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 223  */
 224
 225 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
 226 {
 227         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 228         struct regmap_field *field;
 229         unsigned int val, mode = 0;
 230         int ret;
 231
 232         ret = regmap_field_read(regl->mode, &val);
 233         if (ret < 0)
 234                 return ret;
 235
 236         switch (val) {
 237         default:
 238         case BUCK_MODE_MANUAL:
 239                 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 240                 /* Sleep flag bit decides the mode */
 241                 break;
 242         case BUCK_MODE_SLEEP:
 243                 return REGULATOR_MODE_STANDBY;
 244         case BUCK_MODE_SYNC:
 245                 return REGULATOR_MODE_FAST;
 246         case BUCK_MODE_AUTO:
 247                 return REGULATOR_MODE_NORMAL;
 248         }
 249
 250         /* Detect current regulator state */
 251         ret = regmap_field_read(regl->suspend, &val);
 252         if (ret < 0)
 253                 return 0;
 254
 255         /* Read regulator mode from proper register, depending on state */
 256         if (val)
 257                 field = regl->suspend_sleep;
 258         else
 259                 field = regl->sleep;
 260
 261         ret = regmap_field_read(field, &val);
 262         if (ret < 0)
 263                 return 0;
 264
 265         if (val)
 266                 mode &= REGULATOR_MODE_STANDBY;
 267         else
 268                 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
 269
 270         return mode;
 271 }
 272
 273 /*
 274  * LDOs use sleep flags - one for normal and one for suspend state.
 275  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 276  */
 277
 278 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 279 {
 280         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 281         unsigned val;
 282
 283         switch (mode) {
 284         case REGULATOR_MODE_NORMAL:
 285                 val = 0;
 286                 break;
 287         case REGULATOR_MODE_STANDBY:
 288                 val = 1;
 289                 break;
 290         default:
 291                 return -EINVAL;
 292         }
 293
 294         return regmap_field_write(regl->sleep, val);
 295 }
 296
 297 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 298 {
 299         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 300         struct regmap_field *field;
 301         int ret, val;
 302
 303         /* Detect current regulator state */
 304         ret = regmap_field_read(regl->suspend, &val);
 305         if (ret < 0)
 306                 return 0;
 307
 308         /* Read regulator mode from proper register, depending on state */
 309         if (val)
 310                 field = regl->suspend_sleep;
 311         else
 312                 field = regl->sleep;
 313
 314         ret = regmap_field_read(field, &val);
 315         if (ret < 0)
 316                 return 0;
 317
 318         if (val)
 319                 return REGULATOR_MODE_STANDBY;
 320         else
 321                 return REGULATOR_MODE_NORMAL;
 322 }
 323
 324 static int da9063_buck_get_status(struct regulator_dev *rdev)
 325 {
 326         int ret = regulator_is_enabled_regmap(rdev);
 327
 328         if (ret == 0) {
 329                 ret = REGULATOR_STATUS_OFF;
 330         } else if (ret > 0) {
 331                 ret = da9063_buck_get_mode(rdev);
 332                 if (ret > 0)
 333                         ret = regulator_mode_to_status(ret);
 334                 else if (ret == 0)
 335                         ret = -EIO;
 336         }
 337
 338         return ret;
 339 }
 340
 341 static int da9063_ldo_get_status(struct regulator_dev *rdev)
 342 {
 343         int ret = regulator_is_enabled_regmap(rdev);
 344
 345         if (ret == 0) {
 346                 ret = REGULATOR_STATUS_OFF;
 347         } else if (ret > 0) {
 348                 ret = da9063_ldo_get_mode(rdev);
 349                 if (ret > 0)
 350                         ret = regulator_mode_to_status(ret);
 351                 else if (ret == 0)
 352                         ret = -EIO;
 353         }
 354
 355         return ret;
 356 }
 357
 358 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 359 {
 360         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 361         const struct da9063_regulator_info *rinfo = regl->info;
 362         int ret, sel;
 363
 364         sel = regulator_map_voltage_linear(rdev, uV, uV);
 365         if (sel < 0)
 366                 return -EINVAL;
 367
 368         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 369
 370         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 371                                  rdev->desc->vsel_mask, sel);
 372
 373         return ret;
 374 }
 375
 376 static int da9063_suspend_enable(struct regulator_dev *rdev)
 377 {
 378         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 379
 380         return regmap_field_write(regl->suspend, 1);
 381 }
 382
 383 static int da9063_suspend_disable(struct regulator_dev *rdev)
 384 {
 385         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 386
 387         return regmap_field_write(regl->suspend, 0);
 388 }
 389
 390 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 391 {
 392         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 393         int val;
 394
 395         switch (mode) {
 396         case REGULATOR_MODE_FAST:
 397                 val = BUCK_MODE_SYNC;
 398                 break;
 399         case REGULATOR_MODE_NORMAL:
 400                 val = BUCK_MODE_AUTO;
 401                 break;
 402         case REGULATOR_MODE_STANDBY:
 403                 val = BUCK_MODE_SLEEP;
 404                 break;
 405         default:
 406                 return -EINVAL;
 407         }
 408
 409         return regmap_field_write(regl->mode, val);
 410 }
 411
 412 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 413 {
 414         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 415         unsigned val;
 416
 417         switch (mode) {
 418         case REGULATOR_MODE_NORMAL:
 419                 val = 0;
 420                 break;
 421         case REGULATOR_MODE_STANDBY:
 422                 val = 1;
 423                 break;
 424         default:
 425                 return -EINVAL;
 426         }
 427
 428         return regmap_field_write(regl->suspend_sleep, val);
 429 }
 430
 431 static struct regulator_ops da9063_buck_ops = {
 432         .enable                 = regulator_enable_regmap,
 433         .disable                = regulator_disable_regmap,
 434         .is_enabled             = regulator_is_enabled_regmap,
 435         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 436         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 437         .list_voltage           = regulator_list_voltage_linear,
 438         .set_current_limit      = da9063_set_current_limit,
 439         .get_current_limit      = da9063_get_current_limit,
 440         .set_mode               = da9063_buck_set_mode,
 441         .get_mode               = da9063_buck_get_mode,
 442         .get_status             = da9063_buck_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_buck_set_suspend_mode,
 447 };
 448
 449 static struct regulator_ops da9063_ldo_ops = {
 450         .enable                 = regulator_enable_regmap,
 451         .disable                = regulator_disable_regmap,
 452         .is_enabled             = regulator_is_enabled_regmap,
 453         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 454         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 455         .list_voltage           = regulator_list_voltage_linear,
 456         .set_mode               = da9063_ldo_set_mode,
 457         .get_mode               = da9063_ldo_get_mode,
 458         .get_status             = da9063_ldo_get_status,
 459         .set_suspend_voltage    = da9063_set_suspend_voltage,
 460         .set_suspend_enable     = da9063_suspend_enable,
 461         .set_suspend_disable    = da9063_suspend_disable,
 462         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 463 };
 464
 465 /* Info of regulators for DA9063 */
 466 static const struct da9063_regulator_info da9063_regulator_info[] = {
 467         {
 468                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 469                             da9063_buck_a_limits),
 470                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 471                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 472                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 473                                  DA9063_BCORE1_ILIM_MASK),
 474         },
 475         {
 476                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 477                             da9063_buck_a_limits),
 478                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 479                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 480                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 481                                  DA9063_BCORE2_ILIM_MASK),
 482         },
 483         {
 484                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 485                             da9063_buck_a_limits),
 486                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 487                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 488                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 489                                  DA9063_BPRO_ILIM_MASK),
 490         },
 491         {
 492                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 493                             da9063_buck_b_limits),
 494                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 495                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 496                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 497                                  DA9063_BMEM_ILIM_MASK),
 498         },
 499         {
 500                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 501                             da9063_buck_b_limits),
 502                 DA9063_BUCK_COMMON_FIELDS(BIO),
 503                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 504                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 505                                  DA9063_BIO_ILIM_MASK),
 506         },
 507         {
 508                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 509                             da9063_buck_b_limits),
 510                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 511                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 512                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 513                                  DA9063_BPERI_ILIM_MASK),
 514         },
 515         {
 516                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 517                             da9063_bcores_merged_limits),
 518                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 519                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 520                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 521                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 522                                  DA9063_BCORE1_ILIM_MASK),
 523         },
 524         {
 525                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 526                             da9063_bmem_bio_merged_limits),
 527                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 528                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 529                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 530                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 531                                  DA9063_BMEM_ILIM_MASK),
 532         },
 533         {
 534                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 535                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 536         },
 537         {
 538                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 539                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 540         },
 541         {
 542                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 543                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 544                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 545         },
 546         {
 547                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 548                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 549                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 550         },
 551         {
 552                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 553                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 554         },
 555         {
 556                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 557                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 558         },
 559         {
 560                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 561                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 562                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 563         },
 564         {
 565                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 566                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 567                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 568         },
 569         {
 570                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 571                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 572         },
 573         {
 574                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 575                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 576         },
 577         {
 578                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 579                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 580                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 581         },
 582 };
 583
 584 /* Link chip model with regulators info table */
 585 static struct da9063_dev_model regulators_models[] = {
 586         {
 587                 .regulator_info = da9063_regulator_info,
 588                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 589                 .dev_model = PMIC_DA9063,
 590         },
 591         { }
 592 };
 593
 594 /* Regulator interrupt handlers */
 595 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 596 {
 597         struct da9063_regulators *regulators = data;
 598         struct da9063 *hw = regulators->regulator[0].hw;
 599         struct da9063_regulator *regl;
 600         int bits, i , ret;
 601
 602         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 603         if (ret < 0)
 604                 return IRQ_NONE;
 605
 606         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 607                 regl = &regulators->regulator[i];
 608                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 609                         continue;
 610
 611                 if (BIT(regl->info->oc_event.lsb) & bits)
 612                         regulator_notifier_call_chain(regl->rdev,
 613                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 614         }
 615
 616         return IRQ_HANDLED;
 617 }
 618
 619 /*
 620  * Probing and Initialisation functions
 621  */
 622 static const struct regulator_init_data *da9063_get_regulator_initdata(
 623                 const struct da9063_regulators_pdata *regl_pdata, int id)
 624 {
 625         int i;
 626
 627         for (i = 0; i < regl_pdata->n_regulators; i++) {
 628                 if (id == regl_pdata->regulator_data[i].id)
 629                         return regl_pdata->regulator_data[i].initdata;
 630         }
 631
 632         return NULL;
 633 }
 634
 635 #ifdef CONFIG_OF
 636 static struct of_regulator_match da9063_matches[] = {
 637         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 638         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 639         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 640         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 641         [DA9063_ID_BIO]              = { .name = "bio",             },
 642         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 643         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 644         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 645         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 646         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 647         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 648         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 649         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 650         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 651         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 652         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 653         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 654         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 655         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 656 };
 657
 658 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 659                 struct platform_device *pdev,
 660                 struct of_regulator_match **da9063_reg_matches)
 661 {
 662         struct da9063_regulators_pdata *pdata;
 663         struct da9063_regulator_data *rdata;
 664         struct device_node *node;
 665         int i, n, num;
 666
 667         node = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
 668         if (!node) {
 669                 dev_err(&pdev->dev, "Regulators device node not found\n");
 670                 return ERR_PTR(-ENODEV);
 671         }
 672
 673         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 674                                  ARRAY_SIZE(da9063_matches));
 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 PTR_ERR(regl_pdata);
 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 -EIO;
 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                 dev_err(&pdev->dev, "No memory for regulators\n");
 778                 return -ENOMEM;
 779         }
 780
 781         regulators->n_regulators = n_regulators;
 782         platform_set_drvdata(pdev, regulators);
 783
 784         /* Register all regulators declared in platform information */
 785         n = 0;
 786         id = 0;
 787         while (n < regulators->n_regulators) {
 788                 /* Skip regulator IDs depending on merge mode configuration */
 789                 switch (id) {
 790                 case DA9063_ID_BCORE1:
 791                 case DA9063_ID_BCORE2:
 792                         if (bcores_merged) {
 793                                 id++;
 794                                 continue;
 795                         }
 796                         break;
 797                 case DA9063_ID_BMEM:
 798                 case DA9063_ID_BIO:
 799                         if (bmem_bio_merged) {
 800                                 id++;
 801                                 continue;
 802                         }
 803                         break;
 804                 case DA9063_ID_BCORES_MERGED:
 805                         if (!bcores_merged) {
 806                                 id++;
 807                                 continue;
 808                         }
 809                         break;
 810                 case DA9063_ID_BMEM_BIO_MERGED:
 811                         if (!bmem_bio_merged) {
 812                                 id++;
 813                                 continue;
 814                         }
 815                         break;
 816                 }
 817
 818                 /* Initialise regulator structure */
 819                 regl = &regulators->regulator[n];
 820                 regl->hw = da9063;
 821                 regl->info = &model->regulator_info[id];
 822                 regl->desc = regl->info->desc;
 823                 regl->desc.type = REGULATOR_VOLTAGE;
 824                 regl->desc.owner = THIS_MODULE;
 825
 826                 if (regl->info->mode.reg)
 827                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 828                                         da9063->regmap, regl->info->mode);
 829                 if (regl->info->suspend.reg)
 830                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 831                                         da9063->regmap, regl->info->suspend);
 832                 if (regl->info->sleep.reg)
 833                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 834                                         da9063->regmap, regl->info->sleep);
 835                 if (regl->info->suspend_sleep.reg)
 836                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 837                                         da9063->regmap, regl->info->suspend_sleep);
 838                 if (regl->info->ilimit.reg)
 839                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
 840                                         da9063->regmap, regl->info->ilimit);
 841
 842                 /* Register regulator */
 843                 memset(&config, 0, sizeof(config));
 844                 config.dev = &pdev->dev;
 845                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 846                 config.driver_data = regl;
 847                 if (da9063_reg_matches)
 848                         config.of_node = da9063_reg_matches[id].of_node;
 849                 config.regmap = da9063->regmap;
 850                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 851                                                      &config);
 852                 if (IS_ERR(regl->rdev)) {
 853                         dev_err(&pdev->dev,
 854                                 "Failed to register %s regulator\n",
 855                                 regl->desc.name);
 856                         return PTR_ERR(regl->rdev);
 857                 }
 858                 id++;
 859                 n++;
 860         }
 861
 862         /* LDOs overcurrent event support */
 863         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 864         if (irq < 0) {
 865                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
 866                 return irq;
 867         }
 868
 869         regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq);
 870         if (regulators->irq_ldo_lim >= 0) {
 871                 ret = request_threaded_irq(regulators->irq_ldo_lim,
 872                                            NULL, da9063_ldo_lim_event,
 873                                            IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 874                                            "LDO_LIM", regulators);
 875                 if (ret) {
 876                         dev_err(&pdev->dev,
 877                                         "Failed to request LDO_LIM IRQ.\n");
 878                         regulators->irq_ldo_lim = -ENXIO;
 879                 }
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int da9063_regulator_remove(struct platform_device *pdev)
 886 {
 887         struct da9063_regulators *regulators = platform_get_drvdata(pdev);
 888
 889         free_irq(regulators->irq_ldo_lim, regulators);
 890         free_irq(regulators->irq_uvov, regulators);
 891
 892         return 0;
 893 }
 894
 895 static struct platform_driver da9063_regulator_driver = {
 896         .driver = {
 897                 .name = DA9063_DRVNAME_REGULATORS,
 898                 .owner = THIS_MODULE,
 899         },
 900         .probe = da9063_regulator_probe,
 901         .remove = da9063_regulator_remove,
 902 };
 903
 904 static int __init da9063_regulator_init(void)
 905 {
 906         return platform_driver_register(&da9063_regulator_driver);
 907 }
 908 subsys_initcall(da9063_regulator_init);
 909
 910 static void __exit da9063_regulator_cleanup(void)
 911 {
 912         platform_driver_unregister(&da9063_regulator_driver);
 913 }
 914 module_exit(da9063_regulator_cleanup);
 915
 916
 917 /* Module information */
 918 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 919 MODULE_DESCRIPTION("DA9063 regulators driver");
 920 MODULE_LICENSE("GPL");
 921 MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);