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         enum da9063_type                        type;
 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, LDO3, 900, 20, 3440),
 534                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 535                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 536         },
 537         {
 538                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 539                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 540                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 541         },
 542         {
 543                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 544                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 545                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 546         },
 547         {
 548                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 549                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 550         },
 551         {
 552                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 553                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 554                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 555         },
 556
 557         /* The following LDOs are present only on DA9063, not on DA9063L */
 558         {
 559                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 560                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 561         },
 562         {
 563                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 564                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 565         },
 566         {
 567                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 568                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 569                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 570         },
 571         {
 572                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 573                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 574         },
 575         {
 576                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 577                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 578         },
 579
 580         {
 581                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 582                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 583         },
 584 };
 585
 586 /* Link chip model with regulators info table */
 587 static struct da9063_dev_model regulators_models[] = {
 588         {
 589                 .regulator_info = da9063_regulator_info,
 590                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 591                 .type = PMIC_TYPE_DA9063,
 592         },
 593         {
 594                 .regulator_info = da9063_regulator_info,
 595                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 596                 .type = PMIC_TYPE_DA9063L,
 597         },
 598         { }
 599 };
 600
 601 /* Regulator interrupt handlers */
 602 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 603 {
 604         struct da9063_regulators *regulators = data;
 605         struct da9063 *hw = regulators->regulator[0].hw;
 606         struct da9063_regulator *regl;
 607         int bits, i , ret;
 608
 609         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 610         if (ret < 0)
 611                 return IRQ_NONE;
 612
 613         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 614                 regl = &regulators->regulator[i];
 615                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 616                         continue;
 617
 618                 if (BIT(regl->info->oc_event.lsb) & bits)
 619                         regulator_notifier_call_chain(regl->rdev,
 620                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 621         }
 622
 623         return IRQ_HANDLED;
 624 }
 625
 626 /*
 627  * Probing and Initialisation functions
 628  */
 629 static const struct regulator_init_data *da9063_get_regulator_initdata(
 630                 const struct da9063_regulators_pdata *regl_pdata, int id)
 631 {
 632         int i;
 633
 634         for (i = 0; i < regl_pdata->n_regulators; i++) {
 635                 if (id == regl_pdata->regulator_data[i].id)
 636                         return regl_pdata->regulator_data[i].initdata;
 637         }
 638
 639         return NULL;
 640 }
 641
 642 #ifdef CONFIG_OF
 643 static struct of_regulator_match da9063_matches[] = {
 644         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 645         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 646         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 647         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 648         [DA9063_ID_BIO]              = { .name = "bio",             },
 649         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 650         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 651         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 652         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 653         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 654         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 655         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 656         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 657         /* The following LDOs are present only on DA9063, not on DA9063L */
 658         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 659         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 660         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 661         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 662         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 663         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 664 };
 665
 666 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 667                 struct platform_device *pdev,
 668                 struct of_regulator_match **da9063_reg_matches)
 669 {
 670         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 671         struct da9063_regulators_pdata *pdata;
 672         struct da9063_regulator_data *rdata;
 673         struct device_node *node;
 674         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 675         int i, n, num;
 676
 677         if (da9063->type == PMIC_TYPE_DA9063L)
 678                 da9063_matches_len -= 6;
 679
 680         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 681         if (!node) {
 682                 dev_err(&pdev->dev, "Regulators device node not found\n");
 683                 return ERR_PTR(-ENODEV);
 684         }
 685
 686         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 687                                  da9063_matches_len);
 688         of_node_put(node);
 689         if (num < 0) {
 690                 dev_err(&pdev->dev, "Failed to match regulators\n");
 691                 return ERR_PTR(-EINVAL);
 692         }
 693
 694         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 695         if (!pdata)
 696                 return ERR_PTR(-ENOMEM);
 697
 698         pdata->regulator_data = devm_kcalloc(&pdev->dev,
 699                                         num, sizeof(*pdata->regulator_data),
 700                                         GFP_KERNEL);
 701         if (!pdata->regulator_data)
 702                 return ERR_PTR(-ENOMEM);
 703         pdata->n_regulators = num;
 704
 705         n = 0;
 706         for (i = 0; i < da9063_matches_len; i++) {
 707                 if (!da9063_matches[i].init_data)
 708                         continue;
 709
 710                 rdata = &pdata->regulator_data[n];
 711                 rdata->id = i;
 712                 rdata->initdata = da9063_matches[i].init_data;
 713
 714                 n++;
 715         }
 716
 717         *da9063_reg_matches = da9063_matches;
 718         return pdata;
 719 }
 720 #else
 721 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 722                 struct platform_device *pdev,
 723                 struct of_regulator_match **da9063_reg_matches)
 724 {
 725         *da9063_reg_matches = NULL;
 726         return ERR_PTR(-ENODEV);
 727 }
 728 #endif
 729
 730 static int da9063_regulator_probe(struct platform_device *pdev)
 731 {
 732         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 733         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
 734         struct of_regulator_match *da9063_reg_matches = NULL;
 735         struct da9063_regulators_pdata *regl_pdata;
 736         const struct da9063_dev_model *model;
 737         struct da9063_regulators *regulators;
 738         struct da9063_regulator *regl;
 739         struct regulator_config config;
 740         bool bcores_merged, bmem_bio_merged;
 741         int id, irq, n, n_regulators, ret, val;
 742         size_t size;
 743
 744         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
 745
 746         if (!regl_pdata)
 747                 regl_pdata = da9063_parse_regulators_dt(pdev,
 748                                                         &da9063_reg_matches);
 749
 750         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 751                 dev_err(&pdev->dev,
 752                         "No regulators defined for the platform\n");
 753                 return -ENODEV;
 754         }
 755
 756         /* Find regulators set for particular device model */
 757         for (model = regulators_models; model->regulator_info; model++) {
 758                 if (model->type == da9063->type)
 759                         break;
 760         }
 761         if (!model->regulator_info) {
 762                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 763                         da9063->type);
 764                 return -ENODEV;
 765         }
 766
 767         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 768         if (ret < 0) {
 769                 dev_err(&pdev->dev,
 770                         "Error while reading BUCKs configuration\n");
 771                 return ret;
 772         }
 773         bcores_merged = val & DA9063_BCORE_MERGE;
 774         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 775
 776         n_regulators = model->n_regulators;
 777         if (bcores_merged)
 778                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 779         else
 780                 n_regulators--;    /* remove BCORES_MERGED */
 781         if (bmem_bio_merged)
 782                 n_regulators -= 2; /* remove BMEM, BIO */
 783         else
 784                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 785
 786         /* Allocate memory required by usable regulators */
 787         size = sizeof(struct da9063_regulators) +
 788                 n_regulators * sizeof(struct da9063_regulator);
 789         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 790         if (!regulators)
 791                 return -ENOMEM;
 792
 793         regulators->n_regulators = n_regulators;
 794         platform_set_drvdata(pdev, regulators);
 795
 796         /* Register all regulators declared in platform information */
 797         n = 0;
 798         id = 0;
 799         while (n < regulators->n_regulators) {
 800                 /* Skip regulator IDs depending on merge mode configuration */
 801                 switch (id) {
 802                 case DA9063_ID_BCORE1:
 803                 case DA9063_ID_BCORE2:
 804                         if (bcores_merged) {
 805                                 id++;
 806                                 continue;
 807                         }
 808                         break;
 809                 case DA9063_ID_BMEM:
 810                 case DA9063_ID_BIO:
 811                         if (bmem_bio_merged) {
 812                                 id++;
 813                                 continue;
 814                         }
 815                         break;
 816                 case DA9063_ID_BCORES_MERGED:
 817                         if (!bcores_merged) {
 818                                 id++;
 819                                 continue;
 820                         }
 821                         break;
 822                 case DA9063_ID_BMEM_BIO_MERGED:
 823                         if (!bmem_bio_merged) {
 824                                 id++;
 825                                 continue;
 826                         }
 827                         break;
 828                 }
 829
 830                 /* Initialise regulator structure */
 831                 regl = &regulators->regulator[n];
 832                 regl->hw = da9063;
 833                 regl->info = &model->regulator_info[id];
 834                 regl->desc = regl->info->desc;
 835                 regl->desc.type = REGULATOR_VOLTAGE;
 836                 regl->desc.owner = THIS_MODULE;
 837
 838                 if (regl->info->mode.reg)
 839                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 840                                         da9063->regmap, regl->info->mode);
 841                 if (regl->info->suspend.reg)
 842                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 843                                         da9063->regmap, regl->info->suspend);
 844                 if (regl->info->sleep.reg)
 845                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 846                                         da9063->regmap, regl->info->sleep);
 847                 if (regl->info->suspend_sleep.reg)
 848                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 849                                         da9063->regmap, regl->info->suspend_sleep);
 850                 if (regl->info->ilimit.reg)
 851                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
 852                                         da9063->regmap, regl->info->ilimit);
 853
 854                 /* Register regulator */
 855                 memset(&config, 0, sizeof(config));
 856                 config.dev = &pdev->dev;
 857                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 858                 config.driver_data = regl;
 859                 if (da9063_reg_matches)
 860                         config.of_node = da9063_reg_matches[id].of_node;
 861                 config.regmap = da9063->regmap;
 862                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 863                                                      &config);
 864                 if (IS_ERR(regl->rdev)) {
 865                         dev_err(&pdev->dev,
 866                                 "Failed to register %s regulator\n",
 867                                 regl->desc.name);
 868                         return PTR_ERR(regl->rdev);
 869                 }
 870                 id++;
 871                 n++;
 872         }
 873
 874         /* LDOs overcurrent event support */
 875         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 876         if (irq < 0) {
 877                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
 878                 return irq;
 879         }
 880
 881         ret = devm_request_threaded_irq(&pdev->dev, irq,
 882                                 NULL, da9063_ldo_lim_event,
 883                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 884                                 "LDO_LIM", regulators);
 885         if (ret) {
 886                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 887                 return ret;
 888         }
 889
 890         return 0;
 891 }
 892
 893 static struct platform_driver da9063_regulator_driver = {
 894         .driver = {
 895                 .name = DA9063_DRVNAME_REGULATORS,
 896         },
 897         .probe = da9063_regulator_probe,
 898 };
 899
 900 static int __init da9063_regulator_init(void)
 901 {
 902         return platform_driver_register(&da9063_regulator_driver);
 903 }
 904 subsys_initcall(da9063_regulator_init);
 905
 906 static void __exit da9063_regulator_cleanup(void)
 907 {
 908         platform_driver_unregister(&da9063_regulator_driver);
 909 }
 910 module_exit(da9063_regulator_cleanup);
 911
 912
 913 /* Module information */
 914 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 915 MODULE_DESCRIPTION("DA9063 regulators driver");
 916 MODULE_LICENSE("GPL");
 917 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);