drivers/regulator/da9063-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Regulator driver for DA9063 PMIC series
   4 //
   5 // Copyright 2012 Dialog Semiconductors Ltd.
   6 // Copyright 2013 Philipp Zabel, Pengutronix
   7 //
   8 // Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/err.h>
  14 #include <linux/slab.h>
  15 #include <linux/of.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regmap.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/regulator/of_regulator.h>
  21 #include <linux/mfd/da9063/core.h>
  22 #include <linux/mfd/da9063/pdata.h>
  23 #include <linux/mfd/da9063/registers.h>
  24
  25
  26 /* Definition for registering regmap bit fields using a mask */
  27 #define BFIELD(_reg, _mask) \
  28         REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
  29                 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
  30
  31 /* Regulator capabilities and registers description */
  32 struct da9063_regulator_info {
  33         struct regulator_desc desc;
  34
  35         /* DA9063 main register fields */
  36         struct reg_field mode;          /* buck mode of operation */
  37         struct reg_field suspend;
  38         struct reg_field sleep;
  39         struct reg_field suspend_sleep;
  40         unsigned int suspend_vsel_reg;
  41
  42         /* DA9063 event detection bit */
  43         struct reg_field oc_event;
  44 };
  45
  46 /* Macros for LDO */
  47 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
  48         .desc.id = chip##_ID_##regl_name, \
  49         .desc.name = __stringify(chip##_##regl_name), \
  50         .desc.ops = &da9063_ldo_ops, \
  51         .desc.min_uV = (min_mV) * 1000, \
  52         .desc.uV_step = (step_mV) * 1000, \
  53         .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \
  54                 + (DA9063_V##regl_name##_BIAS)), \
  55         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  56         .desc.enable_mask = DA9063_LDO_EN, \
  57         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  58         .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
  59         .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
  60         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
  61         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
  62         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
  63
  64 /* Macros for voltage DC/DC converters (BUCKs) */
  65 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array, \
  66                     creg, cmask) \
  67         .desc.id = chip##_ID_##regl_name, \
  68         .desc.name = __stringify(chip##_##regl_name), \
  69         .desc.ops = &da9063_buck_ops, \
  70         .desc.min_uV = (min_mV) * 1000, \
  71         .desc.uV_step = (step_mV) * 1000, \
  72         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
  73         .desc.csel_reg = (creg), \
  74         .desc.csel_mask = (cmask), \
  75         .desc.curr_table = limits_array, \
  76         .desc.n_current_limits = ARRAY_SIZE(limits_array)
  77
  78 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
  79         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  80         .desc.enable_mask = DA9063_BUCK_EN, \
  81         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  82         .desc.vsel_mask = DA9063_VBUCK_MASK, \
  83         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
  84         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
  85         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
  86         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
  87         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
  88
  89 /* Defines asignment of regulators info table to chip model */
  90 struct da9063_dev_model {
  91         const struct da9063_regulator_info      *regulator_info;
  92         unsigned                                n_regulators;
  93         enum da9063_type                        type;
  94 };
  95
  96 /* Single regulator settings */
  97 struct da9063_regulator {
  98         struct regulator_desc                   desc;
  99         struct regulator_dev                    *rdev;
 100         struct da9063                           *hw;
 101         const struct da9063_regulator_info      *info;
 102
 103         struct regmap_field                     *mode;
 104         struct regmap_field                     *suspend;
 105         struct regmap_field                     *sleep;
 106         struct regmap_field                     *suspend_sleep;
 107 };
 108
 109 /* Encapsulates all information for the regulators driver */
 110 struct da9063_regulators {
 111         unsigned                                n_regulators;
 112         /* Array size to be defined during init. Keep at end. */
 113         struct da9063_regulator                 regulator[0];
 114 };
 115
 116 /* BUCK modes for DA9063 */
 117 enum {
 118         BUCK_MODE_MANUAL,       /* 0 */
 119         BUCK_MODE_SLEEP,        /* 1 */
 120         BUCK_MODE_SYNC,         /* 2 */
 121         BUCK_MODE_AUTO          /* 3 */
 122 };
 123
 124 /* Regulator operations */
 125
 126 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 127    Entry indexes corresponds to register values. */
 128 static const unsigned int da9063_buck_a_limits[] = {
 129          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 130         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 131 };
 132
 133 /* Current limits array (in uA) for BMEM, BIO, BPERI.
 134    Entry indexes corresponds to register values. */
 135 static const unsigned int da9063_buck_b_limits[] = {
 136         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 137         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 138 };
 139
 140 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
 141    Entry indexes corresponds to register values. */
 142 static const unsigned int da9063_bcores_merged_limits[] = {
 143         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 144         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 145 };
 146
 147 /* Current limits array (in uA) for merged BMEM and BIO.
 148    Entry indexes corresponds to register values. */
 149 static const unsigned int da9063_bmem_bio_merged_limits[] = {
 150         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 151         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 152 };
 153
 154 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
 155 {
 156         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 157         unsigned val;
 158
 159         switch (mode) {
 160         case REGULATOR_MODE_FAST:
 161                 val = BUCK_MODE_SYNC;
 162                 break;
 163         case REGULATOR_MODE_NORMAL:
 164                 val = BUCK_MODE_AUTO;
 165                 break;
 166         case REGULATOR_MODE_STANDBY:
 167                 val = BUCK_MODE_SLEEP;
 168                 break;
 169         default:
 170                 return -EINVAL;
 171         }
 172
 173         return regmap_field_write(regl->mode, val);
 174 }
 175
 176 /*
 177  * Bucks use single mode register field for normal operation
 178  * and suspend state.
 179  * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 180  */
 181
 182 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
 183 {
 184         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 185         struct regmap_field *field;
 186         unsigned int val, mode = 0;
 187         int ret;
 188
 189         ret = regmap_field_read(regl->mode, &val);
 190         if (ret < 0)
 191                 return ret;
 192
 193         switch (val) {
 194         default:
 195         case BUCK_MODE_MANUAL:
 196                 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 197                 /* Sleep flag bit decides the mode */
 198                 break;
 199         case BUCK_MODE_SLEEP:
 200                 return REGULATOR_MODE_STANDBY;
 201         case BUCK_MODE_SYNC:
 202                 return REGULATOR_MODE_FAST;
 203         case BUCK_MODE_AUTO:
 204                 return REGULATOR_MODE_NORMAL;
 205         }
 206
 207         /* Detect current regulator state */
 208         ret = regmap_field_read(regl->suspend, &val);
 209         if (ret < 0)
 210                 return 0;
 211
 212         /* Read regulator mode from proper register, depending on state */
 213         if (val)
 214                 field = regl->suspend_sleep;
 215         else
 216                 field = regl->sleep;
 217
 218         ret = regmap_field_read(field, &val);
 219         if (ret < 0)
 220                 return 0;
 221
 222         if (val)
 223                 mode &= REGULATOR_MODE_STANDBY;
 224         else
 225                 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
 226
 227         return mode;
 228 }
 229
 230 /*
 231  * LDOs use sleep flags - one for normal and one for suspend state.
 232  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 233  */
 234
 235 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 236 {
 237         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 238         unsigned val;
 239
 240         switch (mode) {
 241         case REGULATOR_MODE_NORMAL:
 242                 val = 0;
 243                 break;
 244         case REGULATOR_MODE_STANDBY:
 245                 val = 1;
 246                 break;
 247         default:
 248                 return -EINVAL;
 249         }
 250
 251         return regmap_field_write(regl->sleep, val);
 252 }
 253
 254 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 255 {
 256         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 257         struct regmap_field *field;
 258         int ret, val;
 259
 260         /* Detect current regulator state */
 261         ret = regmap_field_read(regl->suspend, &val);
 262         if (ret < 0)
 263                 return 0;
 264
 265         /* Read regulator mode from proper register, depending on state */
 266         if (val)
 267                 field = regl->suspend_sleep;
 268         else
 269                 field = regl->sleep;
 270
 271         ret = regmap_field_read(field, &val);
 272         if (ret < 0)
 273                 return 0;
 274
 275         if (val)
 276                 return REGULATOR_MODE_STANDBY;
 277         else
 278                 return REGULATOR_MODE_NORMAL;
 279 }
 280
 281 static int da9063_buck_get_status(struct regulator_dev *rdev)
 282 {
 283         int ret = regulator_is_enabled_regmap(rdev);
 284
 285         if (ret == 0) {
 286                 ret = REGULATOR_STATUS_OFF;
 287         } else if (ret > 0) {
 288                 ret = da9063_buck_get_mode(rdev);
 289                 if (ret > 0)
 290                         ret = regulator_mode_to_status(ret);
 291                 else if (ret == 0)
 292                         ret = -EIO;
 293         }
 294
 295         return ret;
 296 }
 297
 298 static int da9063_ldo_get_status(struct regulator_dev *rdev)
 299 {
 300         int ret = regulator_is_enabled_regmap(rdev);
 301
 302         if (ret == 0) {
 303                 ret = REGULATOR_STATUS_OFF;
 304         } else if (ret > 0) {
 305                 ret = da9063_ldo_get_mode(rdev);
 306                 if (ret > 0)
 307                         ret = regulator_mode_to_status(ret);
 308                 else if (ret == 0)
 309                         ret = -EIO;
 310         }
 311
 312         return ret;
 313 }
 314
 315 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 316 {
 317         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 318         const struct da9063_regulator_info *rinfo = regl->info;
 319         int ret, sel;
 320
 321         sel = regulator_map_voltage_linear(rdev, uV, uV);
 322         if (sel < 0)
 323                 return sel;
 324
 325         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 326
 327         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 328                                  rdev->desc->vsel_mask, sel);
 329
 330         return ret;
 331 }
 332
 333 static int da9063_suspend_enable(struct regulator_dev *rdev)
 334 {
 335         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 336
 337         return regmap_field_write(regl->suspend, 1);
 338 }
 339
 340 static int da9063_suspend_disable(struct regulator_dev *rdev)
 341 {
 342         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 343
 344         return regmap_field_write(regl->suspend, 0);
 345 }
 346
 347 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 348 {
 349         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 350         int val;
 351
 352         switch (mode) {
 353         case REGULATOR_MODE_FAST:
 354                 val = BUCK_MODE_SYNC;
 355                 break;
 356         case REGULATOR_MODE_NORMAL:
 357                 val = BUCK_MODE_AUTO;
 358                 break;
 359         case REGULATOR_MODE_STANDBY:
 360                 val = BUCK_MODE_SLEEP;
 361                 break;
 362         default:
 363                 return -EINVAL;
 364         }
 365
 366         return regmap_field_write(regl->mode, val);
 367 }
 368
 369 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 370 {
 371         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 372         unsigned val;
 373
 374         switch (mode) {
 375         case REGULATOR_MODE_NORMAL:
 376                 val = 0;
 377                 break;
 378         case REGULATOR_MODE_STANDBY:
 379                 val = 1;
 380                 break;
 381         default:
 382                 return -EINVAL;
 383         }
 384
 385         return regmap_field_write(regl->suspend_sleep, val);
 386 }
 387
 388 static const struct regulator_ops da9063_buck_ops = {
 389         .enable                 = regulator_enable_regmap,
 390         .disable                = regulator_disable_regmap,
 391         .is_enabled             = regulator_is_enabled_regmap,
 392         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 393         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 394         .list_voltage           = regulator_list_voltage_linear,
 395         .set_current_limit      = regulator_set_current_limit_regmap,
 396         .get_current_limit      = regulator_get_current_limit_regmap,
 397         .set_mode               = da9063_buck_set_mode,
 398         .get_mode               = da9063_buck_get_mode,
 399         .get_status             = da9063_buck_get_status,
 400         .set_suspend_voltage    = da9063_set_suspend_voltage,
 401         .set_suspend_enable     = da9063_suspend_enable,
 402         .set_suspend_disable    = da9063_suspend_disable,
 403         .set_suspend_mode       = da9063_buck_set_suspend_mode,
 404 };
 405
 406 static const struct regulator_ops da9063_ldo_ops = {
 407         .enable                 = regulator_enable_regmap,
 408         .disable                = regulator_disable_regmap,
 409         .is_enabled             = regulator_is_enabled_regmap,
 410         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 411         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 412         .list_voltage           = regulator_list_voltage_linear,
 413         .set_mode               = da9063_ldo_set_mode,
 414         .get_mode               = da9063_ldo_get_mode,
 415         .get_status             = da9063_ldo_get_status,
 416         .set_suspend_voltage    = da9063_set_suspend_voltage,
 417         .set_suspend_enable     = da9063_suspend_enable,
 418         .set_suspend_disable    = da9063_suspend_disable,
 419         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 420 };
 421
 422 /* Info of regulators for DA9063 */
 423 static const struct da9063_regulator_info da9063_regulator_info[] = {
 424         {
 425                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 426                             da9063_buck_a_limits,
 427                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 428                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 429                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 430         },
 431         {
 432                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 433                             da9063_buck_a_limits,
 434                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK),
 435                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 436                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 437         },
 438         {
 439                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 440                             da9063_buck_a_limits,
 441                             DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK),
 442                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 443                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 444         },
 445         {
 446                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 447                             da9063_buck_b_limits,
 448                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 449                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 450                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 451         },
 452         {
 453                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 454                             da9063_buck_b_limits,
 455                             DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK),
 456                 DA9063_BUCK_COMMON_FIELDS(BIO),
 457                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 458         },
 459         {
 460                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 461                             da9063_buck_b_limits,
 462                             DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK),
 463                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 464                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 465         },
 466         {
 467                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 468                             da9063_bcores_merged_limits,
 469                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 470                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 471                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 472                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 473         },
 474         {
 475                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 476                             da9063_bmem_bio_merged_limits,
 477                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 478                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 479                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 480                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 481         },
 482         {
 483                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 484                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 485                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 486         },
 487         {
 488                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 489                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 490                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 491         },
 492         {
 493                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 494                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 495                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 496         },
 497         {
 498                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 499                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 500         },
 501         {
 502                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 503                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 504                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 505         },
 506
 507         /* The following LDOs are present only on DA9063, not on DA9063L */
 508         {
 509                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 510                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 511         },
 512         {
 513                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 514                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 515         },
 516         {
 517                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 518                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 519                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 520         },
 521         {
 522                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 523                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 524         },
 525         {
 526                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 527                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 528         },
 529
 530         {
 531                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 532                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 533         },
 534 };
 535
 536 /* Link chip model with regulators info table */
 537 static struct da9063_dev_model regulators_models[] = {
 538         {
 539                 .regulator_info = da9063_regulator_info,
 540                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 541                 .type = PMIC_TYPE_DA9063,
 542         },
 543         {
 544                 .regulator_info = da9063_regulator_info,
 545                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 546                 .type = PMIC_TYPE_DA9063L,
 547         },
 548         { }
 549 };
 550
 551 /* Regulator interrupt handlers */
 552 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 553 {
 554         struct da9063_regulators *regulators = data;
 555         struct da9063 *hw = regulators->regulator[0].hw;
 556         struct da9063_regulator *regl;
 557         int bits, i , ret;
 558
 559         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 560         if (ret < 0)
 561                 return IRQ_NONE;
 562
 563         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 564                 regl = &regulators->regulator[i];
 565                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 566                         continue;
 567
 568                 if (BIT(regl->info->oc_event.lsb) & bits) {
 569                         regulator_lock(regl->rdev);
 570                         regulator_notifier_call_chain(regl->rdev,
 571                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 572                         regulator_unlock(regl->rdev);
 573                 }
 574         }
 575
 576         return IRQ_HANDLED;
 577 }
 578
 579 /*
 580  * Probing and Initialisation functions
 581  */
 582 static const struct regulator_init_data *da9063_get_regulator_initdata(
 583                 const struct da9063_regulators_pdata *regl_pdata, int id)
 584 {
 585         int i;
 586
 587         for (i = 0; i < regl_pdata->n_regulators; i++) {
 588                 if (id == regl_pdata->regulator_data[i].id)
 589                         return regl_pdata->regulator_data[i].initdata;
 590         }
 591
 592         return NULL;
 593 }
 594
 595 #ifdef CONFIG_OF
 596 static struct of_regulator_match da9063_matches[] = {
 597         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 598         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 599         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 600         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 601         [DA9063_ID_BIO]              = { .name = "bio",             },
 602         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 603         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 604         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 605         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 606         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 607         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 608         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 609         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 610         /* The following LDOs are present only on DA9063, not on DA9063L */
 611         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 612         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 613         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 614         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 615         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 616         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 617 };
 618
 619 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 620                 struct platform_device *pdev,
 621                 struct of_regulator_match **da9063_reg_matches)
 622 {
 623         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 624         struct da9063_regulators_pdata *pdata;
 625         struct da9063_regulator_data *rdata;
 626         struct device_node *node;
 627         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 628         int i, n, num;
 629
 630         if (da9063->type == PMIC_TYPE_DA9063L)
 631                 da9063_matches_len -= 6;
 632
 633         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 634         if (!node) {
 635                 dev_err(&pdev->dev, "Regulators device node not found\n");
 636                 return ERR_PTR(-ENODEV);
 637         }
 638
 639         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 640                                  da9063_matches_len);
 641         of_node_put(node);
 642         if (num < 0) {
 643                 dev_err(&pdev->dev, "Failed to match regulators\n");
 644                 return ERR_PTR(-EINVAL);
 645         }
 646
 647         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 648         if (!pdata)
 649                 return ERR_PTR(-ENOMEM);
 650
 651         pdata->regulator_data = devm_kcalloc(&pdev->dev,
 652                                         num, sizeof(*pdata->regulator_data),
 653                                         GFP_KERNEL);
 654         if (!pdata->regulator_data)
 655                 return ERR_PTR(-ENOMEM);
 656         pdata->n_regulators = num;
 657
 658         n = 0;
 659         for (i = 0; i < da9063_matches_len; i++) {
 660                 if (!da9063_matches[i].init_data)
 661                         continue;
 662
 663                 rdata = &pdata->regulator_data[n];
 664                 rdata->id = i;
 665                 rdata->initdata = da9063_matches[i].init_data;
 666
 667                 n++;
 668         }
 669
 670         *da9063_reg_matches = da9063_matches;
 671         return pdata;
 672 }
 673 #else
 674 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 675                 struct platform_device *pdev,
 676                 struct of_regulator_match **da9063_reg_matches)
 677 {
 678         *da9063_reg_matches = NULL;
 679         return ERR_PTR(-ENODEV);
 680 }
 681 #endif
 682
 683 static int da9063_regulator_probe(struct platform_device *pdev)
 684 {
 685         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 686         struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
 687         struct of_regulator_match *da9063_reg_matches = NULL;
 688         struct da9063_regulators_pdata *regl_pdata;
 689         const struct da9063_dev_model *model;
 690         struct da9063_regulators *regulators;
 691         struct da9063_regulator *regl;
 692         struct regulator_config config;
 693         bool bcores_merged, bmem_bio_merged;
 694         int id, irq, n, n_regulators, ret, val;
 695
 696         regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
 697
 698         if (!regl_pdata)
 699                 regl_pdata = da9063_parse_regulators_dt(pdev,
 700                                                         &da9063_reg_matches);
 701
 702         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 703                 dev_err(&pdev->dev,
 704                         "No regulators defined for the platform\n");
 705                 return -ENODEV;
 706         }
 707
 708         /* Find regulators set for particular device model */
 709         for (model = regulators_models; model->regulator_info; model++) {
 710                 if (model->type == da9063->type)
 711                         break;
 712         }
 713         if (!model->regulator_info) {
 714                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 715                         da9063->type);
 716                 return -ENODEV;
 717         }
 718
 719         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 720         if (ret < 0) {
 721                 dev_err(&pdev->dev,
 722                         "Error while reading BUCKs configuration\n");
 723                 return ret;
 724         }
 725         bcores_merged = val & DA9063_BCORE_MERGE;
 726         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 727
 728         n_regulators = model->n_regulators;
 729         if (bcores_merged)
 730                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 731         else
 732                 n_regulators--;    /* remove BCORES_MERGED */
 733         if (bmem_bio_merged)
 734                 n_regulators -= 2; /* remove BMEM, BIO */
 735         else
 736                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 737
 738         /* Allocate memory required by usable regulators */
 739         regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
 740                                   regulator, n_regulators), GFP_KERNEL);
 741         if (!regulators)
 742                 return -ENOMEM;
 743
 744         regulators->n_regulators = n_regulators;
 745         platform_set_drvdata(pdev, regulators);
 746
 747         /* Register all regulators declared in platform information */
 748         n = 0;
 749         id = 0;
 750         while (n < regulators->n_regulators) {
 751                 /* Skip regulator IDs depending on merge mode configuration */
 752                 switch (id) {
 753                 case DA9063_ID_BCORE1:
 754                 case DA9063_ID_BCORE2:
 755                         if (bcores_merged) {
 756                                 id++;
 757                                 continue;
 758                         }
 759                         break;
 760                 case DA9063_ID_BMEM:
 761                 case DA9063_ID_BIO:
 762                         if (bmem_bio_merged) {
 763                                 id++;
 764                                 continue;
 765                         }
 766                         break;
 767                 case DA9063_ID_BCORES_MERGED:
 768                         if (!bcores_merged) {
 769                                 id++;
 770                                 continue;
 771                         }
 772                         break;
 773                 case DA9063_ID_BMEM_BIO_MERGED:
 774                         if (!bmem_bio_merged) {
 775                                 id++;
 776                                 continue;
 777                         }
 778                         break;
 779                 }
 780
 781                 /* Initialise regulator structure */
 782                 regl = &regulators->regulator[n];
 783                 regl->hw = da9063;
 784                 regl->info = &model->regulator_info[id];
 785                 regl->desc = regl->info->desc;
 786                 regl->desc.type = REGULATOR_VOLTAGE;
 787                 regl->desc.owner = THIS_MODULE;
 788
 789                 if (regl->info->mode.reg) {
 790                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 791                                         da9063->regmap, regl->info->mode);
 792                         if (IS_ERR(regl->mode))
 793                                 return PTR_ERR(regl->mode);
 794                 }
 795
 796                 if (regl->info->suspend.reg) {
 797                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 798                                         da9063->regmap, regl->info->suspend);
 799                         if (IS_ERR(regl->suspend))
 800                                 return PTR_ERR(regl->suspend);
 801                 }
 802
 803                 if (regl->info->sleep.reg) {
 804                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 805                                         da9063->regmap, regl->info->sleep);
 806                         if (IS_ERR(regl->sleep))
 807                                 return PTR_ERR(regl->sleep);
 808                 }
 809
 810                 if (regl->info->suspend_sleep.reg) {
 811                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 812                                         da9063->regmap, regl->info->suspend_sleep);
 813                         if (IS_ERR(regl->suspend_sleep))
 814                                 return PTR_ERR(regl->suspend_sleep);
 815                 }
 816
 817                 /* Register regulator */
 818                 memset(&config, 0, sizeof(config));
 819                 config.dev = &pdev->dev;
 820                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 821                 config.driver_data = regl;
 822                 if (da9063_reg_matches)
 823                         config.of_node = da9063_reg_matches[id].of_node;
 824                 config.regmap = da9063->regmap;
 825                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 826                                                      &config);
 827                 if (IS_ERR(regl->rdev)) {
 828                         dev_err(&pdev->dev,
 829                                 "Failed to register %s regulator\n",
 830                                 regl->desc.name);
 831                         return PTR_ERR(regl->rdev);
 832                 }
 833                 id++;
 834                 n++;
 835         }
 836
 837         /* LDOs overcurrent event support */
 838         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 839         if (irq < 0) {
 840                 dev_err(&pdev->dev, "Failed to get IRQ.\n");
 841                 return irq;
 842         }
 843
 844         ret = devm_request_threaded_irq(&pdev->dev, irq,
 845                                 NULL, da9063_ldo_lim_event,
 846                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 847                                 "LDO_LIM", regulators);
 848         if (ret) {
 849                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 850                 return ret;
 851         }
 852
 853         return 0;
 854 }
 855
 856 static struct platform_driver da9063_regulator_driver = {
 857         .driver = {
 858                 .name = DA9063_DRVNAME_REGULATORS,
 859         },
 860         .probe = da9063_regulator_probe,
 861 };
 862
 863 static int __init da9063_regulator_init(void)
 864 {
 865         return platform_driver_register(&da9063_regulator_driver);
 866 }
 867 subsys_initcall(da9063_regulator_init);
 868
 869 static void __exit da9063_regulator_cleanup(void)
 870 {
 871         platform_driver_unregister(&da9063_regulator_driver);
 872 }
 873 module_exit(da9063_regulator_cleanup);
 874
 875
 876 /* Module information */
 877 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 878 MODULE_DESCRIPTION("DA9063 regulators driver");
 879 MODULE_LICENSE("GPL");
 880 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);