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/registers.h>
  23
  24
  25 /* Definition for registering regmap bit fields using a mask */
  26 #define BFIELD(_reg, _mask) \
  27         REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
  28                 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
  29
  30 /* DA9063 and DA9063L regulator IDs */
  31 enum {
  32         /* BUCKs */
  33         DA9063_ID_BCORE1,
  34         DA9063_ID_BCORE2,
  35         DA9063_ID_BPRO,
  36         DA9063_ID_BMEM,
  37         DA9063_ID_BIO,
  38         DA9063_ID_BPERI,
  39
  40         /* BCORE1 and BCORE2 in merged mode */
  41         DA9063_ID_BCORES_MERGED,
  42         /* BMEM and BIO in merged mode */
  43         DA9063_ID_BMEM_BIO_MERGED,
  44         /* When two BUCKs are merged, they cannot be reused separately */
  45
  46         /* LDOs on both DA9063 and DA9063L */
  47         DA9063_ID_LDO3,
  48         DA9063_ID_LDO7,
  49         DA9063_ID_LDO8,
  50         DA9063_ID_LDO9,
  51         DA9063_ID_LDO11,
  52
  53         /* DA9063-only LDOs */
  54         DA9063_ID_LDO1,
  55         DA9063_ID_LDO2,
  56         DA9063_ID_LDO4,
  57         DA9063_ID_LDO5,
  58         DA9063_ID_LDO6,
  59         DA9063_ID_LDO10,
  60 };
  61
  62 /* Old regulator platform data */
  63 struct da9063_regulator_data {
  64         int                             id;
  65         struct regulator_init_data      *initdata;
  66 };
  67
  68 struct da9063_regulators_pdata {
  69         unsigned                        n_regulators;
  70         struct da9063_regulator_data    *regulator_data;
  71 };
  72
  73 /* Regulator capabilities and registers description */
  74 struct da9063_regulator_info {
  75         struct regulator_desc desc;
  76
  77         /* DA9063 main register fields */
  78         struct reg_field mode;          /* buck mode of operation */
  79         struct reg_field suspend;
  80         struct reg_field sleep;
  81         struct reg_field suspend_sleep;
  82         unsigned int suspend_vsel_reg;
  83
  84         /* DA9063 event detection bit */
  85         struct reg_field oc_event;
  86 };
  87
  88 /* Macros for LDO */
  89 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
  90         .desc.id = chip##_ID_##regl_name, \
  91         .desc.name = __stringify(chip##_##regl_name), \
  92         .desc.ops = &da9063_ldo_ops, \
  93         .desc.min_uV = (min_mV) * 1000, \
  94         .desc.uV_step = (step_mV) * 1000, \
  95         .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \
  96                 + (DA9063_V##regl_name##_BIAS)), \
  97         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  98         .desc.enable_mask = DA9063_LDO_EN, \
  99         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
 100         .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
 101         .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
 102         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
 103         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
 104         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
 105
 106 /* Macros for voltage DC/DC converters (BUCKs) */
 107 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array, \
 108                     creg, cmask) \
 109         .desc.id = chip##_ID_##regl_name, \
 110         .desc.name = __stringify(chip##_##regl_name), \
 111         .desc.ops = &da9063_buck_ops, \
 112         .desc.min_uV = (min_mV) * 1000, \
 113         .desc.uV_step = (step_mV) * 1000, \
 114         .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
 115         .desc.csel_reg = (creg), \
 116         .desc.csel_mask = (cmask), \
 117         .desc.curr_table = limits_array, \
 118         .desc.n_current_limits = ARRAY_SIZE(limits_array)
 119
 120 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \
 121         .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
 122         .desc.enable_mask = DA9063_BUCK_EN, \
 123         .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
 124         .desc.vsel_mask = DA9063_VBUCK_MASK, \
 125         .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
 126         .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
 127         .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
 128         .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
 129         .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
 130
 131 /* Defines asignment of regulators info table to chip model */
 132 struct da9063_dev_model {
 133         const struct da9063_regulator_info      *regulator_info;
 134         unsigned                                n_regulators;
 135         enum da9063_type                        type;
 136 };
 137
 138 /* Single regulator settings */
 139 struct da9063_regulator {
 140         struct regulator_desc                   desc;
 141         struct regulator_dev                    *rdev;
 142         struct da9063                           *hw;
 143         const struct da9063_regulator_info      *info;
 144
 145         struct regmap_field                     *mode;
 146         struct regmap_field                     *suspend;
 147         struct regmap_field                     *sleep;
 148         struct regmap_field                     *suspend_sleep;
 149 };
 150
 151 /* Encapsulates all information for the regulators driver */
 152 struct da9063_regulators {
 153         unsigned                                n_regulators;
 154         /* Array size to be defined during init. Keep at end. */
 155         struct da9063_regulator                 regulator[0];
 156 };
 157
 158 /* BUCK modes for DA9063 */
 159 enum {
 160         BUCK_MODE_MANUAL,       /* 0 */
 161         BUCK_MODE_SLEEP,        /* 1 */
 162         BUCK_MODE_SYNC,         /* 2 */
 163         BUCK_MODE_AUTO          /* 3 */
 164 };
 165
 166 /* Regulator operations */
 167
 168 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 169    Entry indexes corresponds to register values. */
 170 static const unsigned int da9063_buck_a_limits[] = {
 171          500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 172         1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 173 };
 174
 175 /* Current limits array (in uA) for BMEM, BIO, BPERI.
 176    Entry indexes corresponds to register values. */
 177 static const unsigned int da9063_buck_b_limits[] = {
 178         1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 179         2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 180 };
 181
 182 /* Current limits array (in uA) for merged BCORE1 and BCORE2.
 183    Entry indexes corresponds to register values. */
 184 static const unsigned int da9063_bcores_merged_limits[] = {
 185         1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 186         2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 187 };
 188
 189 /* Current limits array (in uA) for merged BMEM and BIO.
 190    Entry indexes corresponds to register values. */
 191 static const unsigned int da9063_bmem_bio_merged_limits[] = {
 192         3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 193         4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 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;
 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                 /* Sleep flag bit decides the mode */
 239                 break;
 240         case BUCK_MODE_SLEEP:
 241                 return REGULATOR_MODE_STANDBY;
 242         case BUCK_MODE_SYNC:
 243                 return REGULATOR_MODE_FAST;
 244         case BUCK_MODE_AUTO:
 245                 return REGULATOR_MODE_NORMAL;
 246         }
 247
 248         /* Detect current regulator state */
 249         ret = regmap_field_read(regl->suspend, &val);
 250         if (ret < 0)
 251                 return 0;
 252
 253         /* Read regulator mode from proper register, depending on state */
 254         if (val)
 255                 field = regl->suspend_sleep;
 256         else
 257                 field = regl->sleep;
 258
 259         ret = regmap_field_read(field, &val);
 260         if (ret < 0)
 261                 return 0;
 262
 263         if (val)
 264                 return REGULATOR_MODE_STANDBY;
 265         else
 266                 return REGULATOR_MODE_FAST;
 267 }
 268
 269 /*
 270  * LDOs use sleep flags - one for normal and one for suspend state.
 271  * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 272  */
 273
 274 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 275 {
 276         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 277         unsigned val;
 278
 279         switch (mode) {
 280         case REGULATOR_MODE_NORMAL:
 281                 val = 0;
 282                 break;
 283         case REGULATOR_MODE_STANDBY:
 284                 val = 1;
 285                 break;
 286         default:
 287                 return -EINVAL;
 288         }
 289
 290         return regmap_field_write(regl->sleep, val);
 291 }
 292
 293 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 294 {
 295         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 296         struct regmap_field *field;
 297         int ret, val;
 298
 299         /* Detect current regulator state */
 300         ret = regmap_field_read(regl->suspend, &val);
 301         if (ret < 0)
 302                 return 0;
 303
 304         /* Read regulator mode from proper register, depending on state */
 305         if (val)
 306                 field = regl->suspend_sleep;
 307         else
 308                 field = regl->sleep;
 309
 310         ret = regmap_field_read(field, &val);
 311         if (ret < 0)
 312                 return 0;
 313
 314         if (val)
 315                 return REGULATOR_MODE_STANDBY;
 316         else
 317                 return REGULATOR_MODE_NORMAL;
 318 }
 319
 320 static int da9063_buck_get_status(struct regulator_dev *rdev)
 321 {
 322         int ret = regulator_is_enabled_regmap(rdev);
 323
 324         if (ret == 0) {
 325                 ret = REGULATOR_STATUS_OFF;
 326         } else if (ret > 0) {
 327                 ret = da9063_buck_get_mode(rdev);
 328                 if (ret > 0)
 329                         ret = regulator_mode_to_status(ret);
 330                 else if (ret == 0)
 331                         ret = -EIO;
 332         }
 333
 334         return ret;
 335 }
 336
 337 static int da9063_ldo_get_status(struct regulator_dev *rdev)
 338 {
 339         int ret = regulator_is_enabled_regmap(rdev);
 340
 341         if (ret == 0) {
 342                 ret = REGULATOR_STATUS_OFF;
 343         } else if (ret > 0) {
 344                 ret = da9063_ldo_get_mode(rdev);
 345                 if (ret > 0)
 346                         ret = regulator_mode_to_status(ret);
 347                 else if (ret == 0)
 348                         ret = -EIO;
 349         }
 350
 351         return ret;
 352 }
 353
 354 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 355 {
 356         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 357         const struct da9063_regulator_info *rinfo = regl->info;
 358         int ret, sel;
 359
 360         sel = regulator_map_voltage_linear(rdev, uV, uV);
 361         if (sel < 0)
 362                 return sel;
 363
 364         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 365
 366         ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 367                                  rdev->desc->vsel_mask, sel);
 368
 369         return ret;
 370 }
 371
 372 static int da9063_suspend_enable(struct regulator_dev *rdev)
 373 {
 374         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 375
 376         return regmap_field_write(regl->suspend, 1);
 377 }
 378
 379 static int da9063_suspend_disable(struct regulator_dev *rdev)
 380 {
 381         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 382
 383         return regmap_field_write(regl->suspend, 0);
 384 }
 385
 386 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 387 {
 388         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 389         int val;
 390
 391         switch (mode) {
 392         case REGULATOR_MODE_FAST:
 393                 val = BUCK_MODE_SYNC;
 394                 break;
 395         case REGULATOR_MODE_NORMAL:
 396                 val = BUCK_MODE_AUTO;
 397                 break;
 398         case REGULATOR_MODE_STANDBY:
 399                 val = BUCK_MODE_SLEEP;
 400                 break;
 401         default:
 402                 return -EINVAL;
 403         }
 404
 405         return regmap_field_write(regl->mode, val);
 406 }
 407
 408 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 409 {
 410         struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 411         unsigned val;
 412
 413         switch (mode) {
 414         case REGULATOR_MODE_NORMAL:
 415                 val = 0;
 416                 break;
 417         case REGULATOR_MODE_STANDBY:
 418                 val = 1;
 419                 break;
 420         default:
 421                 return -EINVAL;
 422         }
 423
 424         return regmap_field_write(regl->suspend_sleep, val);
 425 }
 426
 427 static const struct regulator_ops da9063_buck_ops = {
 428         .enable                 = regulator_enable_regmap,
 429         .disable                = regulator_disable_regmap,
 430         .is_enabled             = regulator_is_enabled_regmap,
 431         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 432         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 433         .list_voltage           = regulator_list_voltage_linear,
 434         .set_current_limit      = regulator_set_current_limit_regmap,
 435         .get_current_limit      = regulator_get_current_limit_regmap,
 436         .set_mode               = da9063_buck_set_mode,
 437         .get_mode               = da9063_buck_get_mode,
 438         .get_status             = da9063_buck_get_status,
 439         .set_suspend_voltage    = da9063_set_suspend_voltage,
 440         .set_suspend_enable     = da9063_suspend_enable,
 441         .set_suspend_disable    = da9063_suspend_disable,
 442         .set_suspend_mode       = da9063_buck_set_suspend_mode,
 443 };
 444
 445 static const struct regulator_ops da9063_ldo_ops = {
 446         .enable                 = regulator_enable_regmap,
 447         .disable                = regulator_disable_regmap,
 448         .is_enabled             = regulator_is_enabled_regmap,
 449         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 450         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 451         .list_voltage           = regulator_list_voltage_linear,
 452         .set_mode               = da9063_ldo_set_mode,
 453         .get_mode               = da9063_ldo_get_mode,
 454         .get_status             = da9063_ldo_get_status,
 455         .set_suspend_voltage    = da9063_set_suspend_voltage,
 456         .set_suspend_enable     = da9063_suspend_enable,
 457         .set_suspend_disable    = da9063_suspend_disable,
 458         .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 459 };
 460
 461 /* Info of regulators for DA9063 */
 462 static const struct da9063_regulator_info da9063_regulator_info[] = {
 463         {
 464                 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 465                             da9063_buck_a_limits,
 466                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 467                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 468                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 469         },
 470         {
 471                 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 472                             da9063_buck_a_limits,
 473                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK),
 474                 DA9063_BUCK_COMMON_FIELDS(BCORE2),
 475                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 476         },
 477         {
 478                 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 479                             da9063_buck_a_limits,
 480                             DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK),
 481                 DA9063_BUCK_COMMON_FIELDS(BPRO),
 482                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 483         },
 484         {
 485                 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 486                             da9063_buck_b_limits,
 487                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 488                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 489                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 490         },
 491         {
 492                 DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 493                             da9063_buck_b_limits,
 494                             DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK),
 495                 DA9063_BUCK_COMMON_FIELDS(BIO),
 496                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 497         },
 498         {
 499                 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 500                             da9063_buck_b_limits,
 501                             DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK),
 502                 DA9063_BUCK_COMMON_FIELDS(BPERI),
 503                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 504         },
 505         {
 506                 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 507                             da9063_bcores_merged_limits,
 508                             DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK),
 509                 /* BCORES_MERGED uses the same register fields as BCORE1 */
 510                 DA9063_BUCK_COMMON_FIELDS(BCORE1),
 511                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 512         },
 513         {
 514                 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 515                             da9063_bmem_bio_merged_limits,
 516                             DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK),
 517                 /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 518                 DA9063_BUCK_COMMON_FIELDS(BMEM),
 519                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 520         },
 521         {
 522                 DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 523                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 524                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 525         },
 526         {
 527                 DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 528                 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 529                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 530         },
 531         {
 532                 DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 533                 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 534                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 535         },
 536         {
 537                 DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 538                 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 539         },
 540         {
 541                 DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 542                 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 543                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 544         },
 545
 546         /* The following LDOs are present only on DA9063, not on DA9063L */
 547         {
 548                 DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 549                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 550         },
 551         {
 552                 DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 553                 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 554         },
 555         {
 556                 DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 557                 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 558                 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 559         },
 560         {
 561                 DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 562                 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 563         },
 564         {
 565                 DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 566                 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 567         },
 568
 569         {
 570                 DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 571                 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 572         },
 573 };
 574
 575 /* Link chip model with regulators info table */
 576 static struct da9063_dev_model regulators_models[] = {
 577         {
 578                 .regulator_info = da9063_regulator_info,
 579                 .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 580                 .type = PMIC_TYPE_DA9063,
 581         },
 582         {
 583                 .regulator_info = da9063_regulator_info,
 584                 .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 585                 .type = PMIC_TYPE_DA9063L,
 586         },
 587         { }
 588 };
 589
 590 /* Regulator interrupt handlers */
 591 static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 592 {
 593         struct da9063_regulators *regulators = data;
 594         struct da9063 *hw = regulators->regulator[0].hw;
 595         struct da9063_regulator *regl;
 596         int bits, i , ret;
 597
 598         ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 599         if (ret < 0)
 600                 return IRQ_NONE;
 601
 602         for (i = regulators->n_regulators - 1; i >= 0; i--) {
 603                 regl = &regulators->regulator[i];
 604                 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 605                         continue;
 606
 607                 if (BIT(regl->info->oc_event.lsb) & bits) {
 608                         regulator_lock(regl->rdev);
 609                         regulator_notifier_call_chain(regl->rdev,
 610                                         REGULATOR_EVENT_OVER_CURRENT, NULL);
 611                         regulator_unlock(regl->rdev);
 612                 }
 613         }
 614
 615         return IRQ_HANDLED;
 616 }
 617
 618 /*
 619  * Probing and Initialisation functions
 620  */
 621 static const struct regulator_init_data *da9063_get_regulator_initdata(
 622                 const struct da9063_regulators_pdata *regl_pdata, int id)
 623 {
 624         int i;
 625
 626         for (i = 0; i < regl_pdata->n_regulators; i++) {
 627                 if (id == regl_pdata->regulator_data[i].id)
 628                         return regl_pdata->regulator_data[i].initdata;
 629         }
 630
 631         return NULL;
 632 }
 633
 634 static struct of_regulator_match da9063_matches[] = {
 635         [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 636         [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 637         [DA9063_ID_BPRO]             = { .name = "bpro",            },
 638         [DA9063_ID_BMEM]             = { .name = "bmem",            },
 639         [DA9063_ID_BIO]              = { .name = "bio",             },
 640         [DA9063_ID_BPERI]            = { .name = "bperi",           },
 641         [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 642         [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 643         [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 644         [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 645         [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 646         [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 647         [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 648         /* The following LDOs are present only on DA9063, not on DA9063L */
 649         [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 650         [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 651         [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 652         [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 653         [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 654         [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 655 };
 656
 657 static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 658                 struct platform_device *pdev,
 659                 struct of_regulator_match **da9063_reg_matches)
 660 {
 661         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 662         struct da9063_regulators_pdata *pdata;
 663         struct da9063_regulator_data *rdata;
 664         struct device_node *node;
 665         int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 666         int i, n, num;
 667
 668         if (da9063->type == PMIC_TYPE_DA9063L)
 669                 da9063_matches_len -= 6;
 670
 671         node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 672         if (!node) {
 673                 dev_err(&pdev->dev, "Regulators device node not found\n");
 674                 return ERR_PTR(-ENODEV);
 675         }
 676
 677         num = of_regulator_match(&pdev->dev, node, da9063_matches,
 678                                  da9063_matches_len);
 679         of_node_put(node);
 680         if (num < 0) {
 681                 dev_err(&pdev->dev, "Failed to match regulators\n");
 682                 return ERR_PTR(-EINVAL);
 683         }
 684
 685         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 686         if (!pdata)
 687                 return ERR_PTR(-ENOMEM);
 688
 689         pdata->regulator_data = devm_kcalloc(&pdev->dev,
 690                                         num, sizeof(*pdata->regulator_data),
 691                                         GFP_KERNEL);
 692         if (!pdata->regulator_data)
 693                 return ERR_PTR(-ENOMEM);
 694         pdata->n_regulators = num;
 695
 696         n = 0;
 697         for (i = 0; i < da9063_matches_len; i++) {
 698                 if (!da9063_matches[i].init_data)
 699                         continue;
 700
 701                 rdata = &pdata->regulator_data[n];
 702                 rdata->id = i;
 703                 rdata->initdata = da9063_matches[i].init_data;
 704
 705                 n++;
 706         }
 707
 708         *da9063_reg_matches = da9063_matches;
 709         return pdata;
 710 }
 711
 712 static int da9063_regulator_probe(struct platform_device *pdev)
 713 {
 714         struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 715         struct of_regulator_match *da9063_reg_matches = NULL;
 716         struct da9063_regulators_pdata *regl_pdata;
 717         const struct da9063_dev_model *model;
 718         struct da9063_regulators *regulators;
 719         struct da9063_regulator *regl;
 720         struct regulator_config config;
 721         bool bcores_merged, bmem_bio_merged;
 722         int id, irq, n, n_regulators, ret, val;
 723
 724         regl_pdata = da9063_parse_regulators_dt(pdev, &da9063_reg_matches);
 725
 726         if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 727                 dev_err(&pdev->dev,
 728                         "No regulators defined for the platform\n");
 729                 return -ENODEV;
 730         }
 731
 732         /* Find regulators set for particular device model */
 733         for (model = regulators_models; model->regulator_info; model++) {
 734                 if (model->type == da9063->type)
 735                         break;
 736         }
 737         if (!model->regulator_info) {
 738                 dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 739                         da9063->type);
 740                 return -ENODEV;
 741         }
 742
 743         ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 744         if (ret < 0) {
 745                 dev_err(&pdev->dev,
 746                         "Error while reading BUCKs configuration\n");
 747                 return ret;
 748         }
 749         bcores_merged = val & DA9063_BCORE_MERGE;
 750         bmem_bio_merged = val & DA9063_BUCK_MERGE;
 751
 752         n_regulators = model->n_regulators;
 753         if (bcores_merged)
 754                 n_regulators -= 2; /* remove BCORE1, BCORE2 */
 755         else
 756                 n_regulators--;    /* remove BCORES_MERGED */
 757         if (bmem_bio_merged)
 758                 n_regulators -= 2; /* remove BMEM, BIO */
 759         else
 760                 n_regulators--;    /* remove BMEM_BIO_MERGED */
 761
 762         /* Allocate memory required by usable regulators */
 763         regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
 764                                   regulator, n_regulators), GFP_KERNEL);
 765         if (!regulators)
 766                 return -ENOMEM;
 767
 768         regulators->n_regulators = n_regulators;
 769         platform_set_drvdata(pdev, regulators);
 770
 771         /* Register all regulators declared in platform information */
 772         n = 0;
 773         id = 0;
 774         while (n < regulators->n_regulators) {
 775                 /* Skip regulator IDs depending on merge mode configuration */
 776                 switch (id) {
 777                 case DA9063_ID_BCORE1:
 778                 case DA9063_ID_BCORE2:
 779                         if (bcores_merged) {
 780                                 id++;
 781                                 continue;
 782                         }
 783                         break;
 784                 case DA9063_ID_BMEM:
 785                 case DA9063_ID_BIO:
 786                         if (bmem_bio_merged) {
 787                                 id++;
 788                                 continue;
 789                         }
 790                         break;
 791                 case DA9063_ID_BCORES_MERGED:
 792                         if (!bcores_merged) {
 793                                 id++;
 794                                 continue;
 795                         }
 796                         break;
 797                 case DA9063_ID_BMEM_BIO_MERGED:
 798                         if (!bmem_bio_merged) {
 799                                 id++;
 800                                 continue;
 801                         }
 802                         break;
 803                 }
 804
 805                 /* Initialise regulator structure */
 806                 regl = &regulators->regulator[n];
 807                 regl->hw = da9063;
 808                 regl->info = &model->regulator_info[id];
 809                 regl->desc = regl->info->desc;
 810                 regl->desc.type = REGULATOR_VOLTAGE;
 811                 regl->desc.owner = THIS_MODULE;
 812
 813                 if (regl->info->mode.reg) {
 814                         regl->mode = devm_regmap_field_alloc(&pdev->dev,
 815                                         da9063->regmap, regl->info->mode);
 816                         if (IS_ERR(regl->mode))
 817                                 return PTR_ERR(regl->mode);
 818                 }
 819
 820                 if (regl->info->suspend.reg) {
 821                         regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 822                                         da9063->regmap, regl->info->suspend);
 823                         if (IS_ERR(regl->suspend))
 824                                 return PTR_ERR(regl->suspend);
 825                 }
 826
 827                 if (regl->info->sleep.reg) {
 828                         regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 829                                         da9063->regmap, regl->info->sleep);
 830                         if (IS_ERR(regl->sleep))
 831                                 return PTR_ERR(regl->sleep);
 832                 }
 833
 834                 if (regl->info->suspend_sleep.reg) {
 835                         regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 836                                         da9063->regmap, regl->info->suspend_sleep);
 837                         if (IS_ERR(regl->suspend_sleep))
 838                                 return PTR_ERR(regl->suspend_sleep);
 839                 }
 840
 841                 /* Register regulator */
 842                 memset(&config, 0, sizeof(config));
 843                 config.dev = &pdev->dev;
 844                 config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 845                 config.driver_data = regl;
 846                 if (da9063_reg_matches)
 847                         config.of_node = da9063_reg_matches[id].of_node;
 848                 config.regmap = da9063->regmap;
 849                 regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 850                                                      &config);
 851                 if (IS_ERR(regl->rdev)) {
 852                         dev_err(&pdev->dev,
 853                                 "Failed to register %s regulator\n",
 854                                 regl->desc.name);
 855                         return PTR_ERR(regl->rdev);
 856                 }
 857                 id++;
 858                 n++;
 859         }
 860
 861         /* LDOs overcurrent event support */
 862         irq = platform_get_irq_byname(pdev, "LDO_LIM");
 863         if (irq < 0)
 864                 return irq;
 865
 866         ret = devm_request_threaded_irq(&pdev->dev, irq,
 867                                 NULL, da9063_ldo_lim_event,
 868                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 869                                 "LDO_LIM", regulators);
 870         if (ret) {
 871                 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 872                 return ret;
 873         }
 874
 875         return 0;
 876 }
 877
 878 static struct platform_driver da9063_regulator_driver = {
 879         .driver = {
 880                 .name = DA9063_DRVNAME_REGULATORS,
 881         },
 882         .probe = da9063_regulator_probe,
 883 };
 884
 885 static int __init da9063_regulator_init(void)
 886 {
 887         return platform_driver_register(&da9063_regulator_driver);
 888 }
 889 subsys_initcall(da9063_regulator_init);
 890
 891 static void __exit da9063_regulator_cleanup(void)
 892 {
 893         platform_driver_unregister(&da9063_regulator_driver);
 894 }
 895 module_exit(da9063_regulator_cleanup);
 896
 897
 898 /* Module information */
 899 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 900 MODULE_DESCRIPTION("DA9063 regulators driver");
 901 MODULE_LICENSE("GPL");
 902 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);