kernel/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         int                                     irq_ldo_lim;
 121         int                                     irq_uvov;
 122
 123         unsigned                                n_regulators;
 124         /* Array size to be defined during init. Keep at end. */
 125         struct da9063_regulator                 regulator[0];
 126 };
 127
 128 /* BUCK modes for DA9063 */
 129 enum {
 130         BUCK_MODE_MANUAL,       /* 0 */
 131         BUCK_MODE_SLEEP,        /* 1 */
 132         BUCK_MODE_SYNC,         /* 2 */
 133         BUCK_MODE_AUTO          /* 3 */
 134 };
 135
 136 /* Regulator operations */
 137
 138 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 139    Entry indexes corresponds to register values. */
 140 static const int da9063_buck_a_limits[] = {
 141          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 142         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 143 };
 144
 145 /* Current limits array (in uA) for BMEM, BIO, BPERI.
 146    Entry indexes corresponds to register values. */
 147 static const int da9063_buck_b_limits[] = {
 148         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 149         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 150 };
 151
 152 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
 153    Entry indexes corresponds to register values. */
 154 static const int da9063_bcores_merged_limits[] = {
 155         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 156         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 157 };
 158
 159 /* Current limits array (in uA) for merged BMEM and BIO.
 160    Entry indexes corresponds to register values. */
 161 static const int da9063_bmem_bio_merged_limits[] = {
 162         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 163         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 164 };
 165
 166 static int da9063_set_current_limit(struct regulator_dev *rdev,
 167                                                         int min_uA, int max_uA)
 168 {
 169         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 170         const struct da9063_regulator_info *rinfo = regl->info;
 171         int n, tval;
 172
 173         for (n = 0; n < rinfo->n_current_limits; n++) {
 174                 tval = rinfo->current_limits[n];
 175                 if (tval >= min_uA && tval <= max_uA)
 176                         return regmap_field_write(regl->ilimit, n);
 177         }
 178
 179         return -EINVAL;
 180 }
 181
 182 static int da9063_get_current_limit(struct regulator_dev *rdev)
 183 {
 184         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 185         const struct da9063_regulator_info *rinfo = regl->info;
 186         unsigned int sel;
 187         int ret;
 188
 189         ret = regmap_field_read(regl->ilimit, &sel);
 190         if (ret < 0)
 191                 return ret;
 192
 193         if (sel >= rinfo->n_current_limits)
 194                 sel = rinfo->n_current_limits - 1;
 195
 196         return rinfo->current_limits[sel];
 197 }
 198
 199 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
 200 {
 201         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 202         unsigned val;
 203
 204         switch (mode) {
 205         case REGULATOR_MODE_FAST:
 206                 val = BUCK_MODE_SYNC;
 207                 break;
 208         case REGULATOR_MODE_NORMAL:
 209                 val = BUCK_MODE_AUTO;
 210                 break;
 211         case REGULATOR_MODE_STANDBY:
 212                 val = BUCK_MODE_SLEEP;
 213                 break;
 214         default:
 215                 return -EINVAL;
 216         }
 217
 218         return regmap_field_write(regl->mode, val);
 219 }
 220
 221 /*
 222  * Bucks use single mode register field for normal operation
 223  * and suspend state.
 224  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 225  */
 226
 227 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
 228 {
 229         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 230         struct regmap_field *field;
 231         unsigned int val, mode = 0;
 232         int ret;
 233
 234         ret = regmap_field_read(regl->mode, &val);
 235         if (ret < 0)
 236                 return ret;
 237
 238         switch (val) {
 239         default:
 240         case BUCK_MODE_MANUAL:
 241                 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 242                 /* Sleep flag bit decides the mode */
 243                 break;
 244         case BUCK_MODE_SLEEP:
 245                 return REGULATOR_MODE_STANDBY;
 246         case BUCK_MODE_SYNC:
 247                 return REGULATOR_MODE_FAST;
 248         case BUCK_MODE_AUTO:
 249                 return REGULATOR_MODE_NORMAL;
 250         }
 251
 252         /* Detect current regulator state */
 253         ret = regmap_field_read(regl->suspend, &val);
 254         if (ret < 0)
 255                 return 0;
 256
 257         /* Read regulator mode from proper register, depending on state */
 258         if (val)
 259                 field = regl->suspend_sleep;
 260         else
 261                 field = regl->sleep;
 262
 263         ret = regmap_field_read(field, &val);
 264         if (ret < 0)
 265                 return 0;
 266
 267         if (val)
 268                 mode &= REGULATOR_MODE_STANDBY;
 269         else
 270                 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
 271
 272         return mode;
 273 }
 274
 275 /*
 276  * LDOs use sleep flags - one for normal and one for suspend state.
 277  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 278  */
 279
 280 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 281 {
 282         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 283         unsigned val;
 284
 285         switch (mode) {
 286         case REGULATOR_MODE_NORMAL:
 287                 val = 0;
 288                 break;
 289         case REGULATOR_MODE_STANDBY:
 290                 val = 1;
 291                 break;
 292         default:
 293                 return -EINVAL;
 294         }
 295
 296         return regmap_field_write(regl->sleep, val);
 297 }
 298
 299 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 300 {
 301         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 302         struct regmap_field *field;
 303         int ret, val;
 304
 305         /* Detect current regulator state */
 306         ret = regmap_field_read(regl->suspend, &val);
 307         if (ret < 0)
 308                 return 0;
 309
 310         /* Read regulator mode from proper register, depending on state */
 311         if (val)
 312                 field = regl->suspend_sleep;
 313         else
 314                 field = regl->sleep;
 315
 316         ret = regmap_field_read(field, &val);
 317         if (ret < 0)
 318                 return 0;
 319
 320         if (val)
 321                 return REGULATOR_MODE_STANDBY;
 322         else
 323                 return REGULATOR_MODE_NORMAL;
 324 }
 325
 326 static int da9063_buck_get_status(struct regulator_dev *rdev)
 327 {
 328         int ret = regulator_is_enabled_regmap(rdev);
 329
 330         if (ret == 0) {
 331                 ret = REGULATOR_STATUS_OFF;
 332         } else if (ret > 0) {
 333                 ret = da9063_buck_get_mode(rdev);
 334                 if (ret > 0)
 335                         ret = regulator_mode_to_status(ret);
 336                 else if (ret == 0)
 337                         ret = -EIO;
 338         }
 339
 340         return ret;
 341 }
 342
 343 static int da9063_ldo_get_status(struct regulator_dev *rdev)
 344 {
 345         int ret = regulator_is_enabled_regmap(rdev);
 346
 347         if (ret == 0) {
 348                 ret = REGULATOR_STATUS_OFF;
 349         } else if (ret > 0) {
 350                 ret = da9063_ldo_get_mode(rdev);
 351                 if (ret > 0)
 352                         ret = regulator_mode_to_status(ret);
 353                 else if (ret == 0)
 354                         ret = -EIO;
 355         }
 356
 357         return ret;
 358 }
 359
 360 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 361 {
 362         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 363         const struct da9063_regulator_info *rinfo = regl->info;
 364         int ret, sel;
 365
 366         sel = regulator_map_voltage_linear(rdev, uV, uV);
 367         if (sel < 0)
 368                 return sel;
 369
 370         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 371
 372         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 373                                  rdev->desc->vsel_mask, sel);
 374
 375         return ret;
 376 }
 377
 378 static int da9063_suspend_enable(struct regulator_dev *rdev)
 379 {
 380         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 381
 382         return regmap_field_write(regl->suspend, 1);
 383 }
 384
 385 static int da9063_suspend_disable(struct regulator_dev *rdev)
 386 {
 387         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 388
 389         return regmap_field_write(regl->suspend, 0);
 390 }
 391
 392 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 393 {
 394         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 395         int val;
 396
 397         switch (mode) {
 398         case REGULATOR_MODE_FAST:
 399                 val = BUCK_MODE_SYNC;
 400                 break;
 401         case REGULATOR_MODE_NORMAL:
 402                 val = BUCK_MODE_AUTO;
 403                 break;
 404         case REGULATOR_MODE_STANDBY:
 405                 val = BUCK_MODE_SLEEP;
 406                 break;
 407         default:
 408                 return -EINVAL;
 409         }
 410
 411         return regmap_field_write(regl->mode, val);
 412 }
 413
 414 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 415 {
 416         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 417         unsigned val;
 418
 419         switch (mode) {
 420         case REGULATOR_MODE_NORMAL:
 421                 val = 0;
 422                 break;
 423         case REGULATOR_MODE_STANDBY:
 424                 val = 1;
 425                 break;
 426         default:
 427                 return -EINVAL;
 428         }
 429
 430         return regmap_field_write(regl->suspend_sleep, val);
 431 }
 432
 433 static struct regulator_ops da9063_buck_ops = {
 434         .enable                 = regulator_enable_regmap,
 435         .disable                = regulator_disable_regmap,
 436         .is_enabled             = regulator_is_enabled_regmap,
 437         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 438         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 439         .list_voltage           = regulator_list_voltage_linear,
 440         .set_current_limit      = da9063_set_current_limit,
 441         .get_current_limit      = da9063_get_current_limit,
 442         .set_mode               = da9063_buck_set_mode,
 443         .get_mode               = da9063_buck_get_mode,
 444         .get_status             = da9063_buck_get_status,
 445         .set_suspend_voltage    = da9063_set_suspend_voltage,
 446         .set_suspend_enable     = da9063_suspend_enable,
 447         .set_suspend_disable    = da9063_suspend_disable,
 448         .set_suspend_mode       = da9063_buck_set_suspend_mode,
 449 };
 450
 451 static struct regulator_ops da9063_ldo_ops = {
 452         .enable                 = regulator_enable_regmap,
 453         .disable                = regulator_disable_regmap,
 454         .is_enabled             = regulator_is_enabled_regmap,
 455         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 456         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 457         .list_voltage           = regulator_list_voltage_linear,
 458         .set_mode               = da9063_ldo_set_mode,
 459         .get_mode               = da9063_ldo_get_mode,
 460         .get_status             = da9063_ldo_get_status,
 461         .set_suspend_voltage    = da9063_set_suspend_voltage,
 462         .set_suspend_enable     = da9063_suspend_enable,
 463         .set_suspend_disable    = da9063_suspend_disable,
 464         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 465 };
 466
 467 /* Info of regulators for DA9063 */
 468 static const struct da9063_regulator_info da9063_regulator_info[] = {
 469         {
 470                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 471                             da9063_buck_a_limits),
 472                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 473                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 474                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 475                                  DA9063_BCORE1_ILIM_MASK),
 476         },
 477         {
 478                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 479                             da9063_buck_a_limits),
 480                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 481                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 482                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 483                                  DA9063_BCORE2_ILIM_MASK),
 484         },
 485         {
 486                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 487                             da9063_buck_a_limits),
 488                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 489                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 490                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 491                                  DA9063_BPRO_ILIM_MASK),
 492         },
 493         {
 494                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 495                             da9063_buck_b_limits),
 496                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 497                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 498                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 499                                  DA9063_BMEM_ILIM_MASK),
 500         },
 501         {
 502                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 503                             da9063_buck_b_limits),
 504                 DA9063_BUCK_COMMON_FIELDS(BIO),
 505                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 506                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 507                                  DA9063_BIO_ILIM_MASK),
 508         },
 509         {
 510                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 511                             da9063_buck_b_limits),
 512                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 513                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 514                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 515                                  DA9063_BPERI_ILIM_MASK),
 516         },
 517         {
 518                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 519                             da9063_bcores_merged_limits),
 520                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 521                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 522                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 523                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 524                                  DA9063_BCORE1_ILIM_MASK),
 525         },
 526         {
 527                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 528                             da9063_bmem_bio_merged_limits),
 529                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 530                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 531                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 532                 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 533                                  DA9063_BMEM_ILIM_MASK),
 534         },
 535         {
 536                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 537                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 538         },
 539         {
 540                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 541                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 542         },
 543         {
 544                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 545                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 546                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 547         },
 548         {
 549                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 550                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 551                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 552         },
 553         {
 554                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 555                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 556         },
 557         {
 558                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 559                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 560         },
 561         {
 562                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 563                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 564                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 565         },
 566         {
 567                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 568                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 569                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 570         },
 571         {
 572                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 573                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 574         },
 575         {
 576                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 577                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 578         },
 579         {
 580                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 581                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 582                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 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                 .dev_model = PMIC_DA9063,
 592         },
 593         { }
 594 };
 595
 596 /* Regulator interrupt handlers */
 597 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 598 {
 599         struct da9063_regulators *regulators = data;
 600         struct da9063 *hw = regulators->regulator[0].hw;
 601         struct da9063_regulator *regl;
 602         int bits, i , ret;
 603
 604         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 605         if (ret < 0)
 606                 return IRQ_NONE;
 607
 608         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 609                 regl = &regulators->regulator[i];
 610                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 611                         continue;
 612
 613                 if (BIT(regl->info->oc_event.lsb) & bits)
 614                         regulator_notifier_call_chain(regl->rdev,
 615                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 616         }
 617
 618         return IRQ_HANDLED;
 619 }
 620
 621 /*
 622  * Probing and Initialisation functions
 623  */
 624 static const struct regulator_init_data *da9063_get_regulator_initdata(
 625                 const struct da9063_regulators_pdata *regl_pdata, int id)
 626 {
 627         int i;
 628
 629         for (i = 0; i < regl_pdata->n_regulators; i++) {
 630                 if (id == regl_pdata->regulator_data[i].id)
 631                         return regl_pdata->regulator_data[i].initdata;
 632         }
 633
 634         return NULL;
 635 }
 636
 637 #ifdef CONFIG_OF
 638 static struct of_regulator_match da9063_matches[] = {
 639         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 640         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 641         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 642         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 643         [DA9063_ID_BIO]              = { .name = "bio",             },
 644         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 645         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 646         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 647         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 648         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 649         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 650         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 651         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 652         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 653         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 654         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 655         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 656         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 657         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 658 };
 659
 660 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 661                 struct platform_device *pdev,
 662                 struct of_regulator_match **da9063_reg_matches)
 663 {
 664         struct da9063_regulators_pdata *pdata;
 665         struct da9063_regulator_data *rdata;
 666         struct device_node *node;
 667         int i, n, num;
 668
 669         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 670         if (!node) {
 671                 dev_err(&pdev->dev, "Regulators device node not found\n");
 672                 return ERR_PTR(-ENODEV);
 673         }
 674
 675         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 676                                  ARRAY_SIZE(da9063_matches));
 677         of_node_put(node);
 678         if (num < 0) {
 679                 dev_err(&pdev->dev, "Failed to match regulators\n");
 680                 return ERR_PTR(-EINVAL);
 681         }
 682
 683         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 684         if (!pdata)
 685                 return ERR_PTR(-ENOMEM);
 686
 687         pdata->regulator_data = devm_kzalloc(&pdev->dev,
 688                                         num * sizeof(*pdata->regulator_data),
 689                                         GFP_KERNEL);
 690         if (!pdata->regulator_data)
 691                 return ERR_PTR(-ENOMEM);
 692         pdata->n_regulators = num;
 693
 694         n = 0;
 695         for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
 696                 if (!da9063_matches[i].init_data)
 697                         continue;
 698
 699                 rdata = &pdata->regulator_data[n];
 700                 rdata->id = i;
 701                 rdata->initdata = da9063_matches[i].init_data;
 702
 703                 n++;
 704         };
 705
 706         *da9063_reg_matches = da9063_matches;
 707         return pdata;
 708 }
 709 #else
 710 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 711                 struct platform_device *pdev,
 712                 struct of_regulator_match **da9063_reg_matches)
 713 {
 714         *da9063_reg_matches = NULL;
 715         return ERR_PTR(-ENODEV);
 716 }
 717 #endif
 718
 719 static int da9063_regulator_probe(struct platform_device *pdev)
 720 {
 721         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 722         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
 723         struct of_regulator_match *da9063_reg_matches = NULL;
 724         struct da9063_regulators_pdata *regl_pdata;
 725         const struct da9063_dev_model *model;
 726         struct da9063_regulators *regulators;
 727         struct da9063_regulator *regl;
 728         struct regulator_config config;
 729         bool bcores_merged, bmem_bio_merged;
 730         int id, irq, n, n_regulators, ret, val;
 731         size_t size;
 732
 733         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
 734
 735         if (!regl_pdata)
 736                 regl_pdata = da9063_parse_regulators_dt(pdev,
 737                                                         &da9063_reg_matches);
 738
 739         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 740                 dev_err(&pdev->dev,
 741                         "No regulators defined for the platform\n");
 742                 return PTR_ERR(regl_pdata);
 743         }
 744
 745         /* Find regulators set for particular device model */
 746         for (model = regulators_models; model->regulator_info; model++) {
 747                 if (model->dev_model == da9063->model)
 748                         break;
 749         }
 750         if (!model->regulator_info) {
 751                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 752                         da9063->model);
 753                 return -ENODEV;
 754         }
 755
 756         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 757         if (ret < 0) {
 758                 dev_err(&pdev->dev,
 759                         "Error while reading BUCKs configuration\n");
 760                 return ret;
 761         }
 762         bcores_merged = val & DA9063_BCORE_MERGE;
 763         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 764
 765         n_regulators = model->n_regulators;
 766         if (bcores_merged)
 767                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 768         else
 769                 n_regulators--;    /* remove BCORES_MERGED */
 770         if (bmem_bio_merged)
 771                 n_regulators -= 2; /* remove BMEM, BIO */
 772         else
 773                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 774
 775         /* Allocate memory required by usable regulators */
 776         size = sizeof(struct da9063_regulators) +
 777                 n_regulators * sizeof(struct da9063_regulator);
 778         regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 779         if (!regulators)
 780                 return -ENOMEM;
 781
 782         regulators->n_regulators = n_regulators;
 783         platform_set_drvdata(pdev, regulators);
 784
 785         /* Register all regulators declared in platform information */
 786         n = 0;
 787         id = 0;
 788         while (n < regulators->n_regulators) {
 789                 /* Skip regulator IDs depending on merge mode configuration */
 790                 switch (id) {
 791                 case DA9063_ID_BCORE1:
 792                 case DA9063_ID_BCORE2:
 793                         if (bcores_merged) {
 794                                 id++;
 795                                 continue;
 796                         }
 797                         break;
 798                 case DA9063_ID_BMEM:
 799                 case DA9063_ID_BIO:
 800                         if (bmem_bio_merged) {
 801                                 id++;
 802                                 continue;
 803                         }
 804                         break;
 805                 case DA9063_ID_BCORES_MERGED:
 806                         if (!bcores_merged) {
 807                                 id++;
 808                                 continue;
 809                         }
 810                         break;
 811                 case DA9063_ID_BMEM_BIO_MERGED:
 812                         if (!bmem_bio_merged) {
 813                                 id++;
 814                                 continue;
 815                         }
 816                         break;
 817                 }
 818
 819                 /* Initialise regulator structure */
 820                 regl = &regulators->regulator[n];
 821                 regl->hw = da9063;
 822                 regl->info = &model->regulator_info[id];
 823                 regl->desc = regl->info->desc;
 824                 regl->desc.type = REGULATOR_VOLTAGE;
 825                 regl->desc.owner = THIS_MODULE;
 826
 827                 if (regl->info->mode.reg)
 828                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 829                                         da9063->regmap, regl->info->mode);
 830                 if (regl->info->suspend.reg)
 831                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 832                                         da9063->regmap, regl->info->suspend);
 833                 if (regl->info->sleep.reg)
 834                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 835                                         da9063->regmap, regl->info->sleep);
 836                 if (regl->info->suspend_sleep.reg)
 837                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 838                                         da9063->regmap, regl->info->suspend_sleep);
 839                 if (regl->info->ilimit.reg)
 840                         regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
 841                                         da9063->regmap, regl->info->ilimit);
 842
 843                 /* Register regulator */
 844                 memset(&config, 0, sizeof(config));
 845                 config.dev = &pdev->dev;
 846                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 847                 config.driver_data = regl;
 848                 if (da9063_reg_matches)
 849                         config.of_node = da9063_reg_matches[id].of_node;
 850                 config.regmap = da9063->regmap;
 851                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 852                                                      &config);
 853                 if (IS_ERR(regl->rdev)) {
 854                         dev_err(&pdev->dev,
 855                                 "Failed to register %s regulator\n",
 856                                 regl->desc.name);
 857                         return PTR_ERR(regl->rdev);
 858                 }
 859                 id++;
 860                 n++;
 861         }
 862
 863         /* LDOs overcurrent event support */
 864         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 865         if (irq < 0) {
 866                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
 867                 return irq;
 868         }
 869
 870         ret = request_threaded_irq(irq,
 871                                 NULL, da9063_ldo_lim_event,
 872                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 873                                 "LDO_LIM", regulators);
 874         if (ret) {
 875                 dev_err(&pdev->dev,
 876                                 "Failed to request LDO_LIM IRQ.\n");
 877                 regulators->irq_ldo_lim = -ENXIO;
 878         }
 879
 880         return 0;
 881 }
 882
 883 static int da9063_regulator_remove(struct platform_device *pdev)
 884 {
 885         struct da9063_regulators *regulators = platform_get_drvdata(pdev);
 886
 887         free_irq(regulators->irq_ldo_lim, regulators);
 888         free_irq(regulators->irq_uvov, regulators);
 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         .remove = da9063_regulator_remove,
 899 };
 900
 901 static int __init da9063_regulator_init(void)
 902 {
 903         return platform_driver_register(&da9063_regulator_driver);
 904 }
 905 subsys_initcall(da9063_regulator_init);
 906
 907 static void __exit da9063_regulator_cleanup(void)
 908 {
 909         platform_driver_unregister(&da9063_regulator_driver);
 910 }
 911 module_exit(da9063_regulator_cleanup);
 912
 913
 914 /* Module information */
 915 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 916 MODULE_DESCRIPTION("DA9063 regulators driver");
 917 MODULE_LICENSE("GPL");
 918 MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);