linux/drivers/regulator/da9063-regulator.c
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   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 */
  38struct 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 */
  98struct da9063_dev_model {
  99        const struct da9063_regulator_info      *regulator_info;
 100        unsigned                                n_regulators;
 101        enum da9063_type                        type;
 102};
 103
 104/* Single regulator settings */
 105struct 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 */
 119struct da9063_regulators {
 120        unsigned                                n_regulators;
 121        /* Array size to be defined during init. Keep at end. */
 122        struct da9063_regulator                 regulator[0];
 123};
 124
 125/* BUCK modes for DA9063 */
 126enum {
 127        BUCK_MODE_MANUAL,       /* 0 */
 128        BUCK_MODE_SLEEP,        /* 1 */
 129        BUCK_MODE_SYNC,         /* 2 */
 130        BUCK_MODE_AUTO          /* 3 */
 131};
 132
 133/* Regulator operations */
 134
 135/* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 136   Entry indexes corresponds to register values. */
 137static const int da9063_buck_a_limits[] = {
 138         500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 139        1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 140};
 141
 142/* Current limits array (in uA) for BMEM, BIO, BPERI.
 143   Entry indexes corresponds to register values. */
 144static const int da9063_buck_b_limits[] = {
 145        1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 146        2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 147};
 148
 149/* Current limits array (in uA) for merged BCORE1 and BCORE2.
 150   Entry indexes corresponds to register values. */
 151static const int da9063_bcores_merged_limits[] = {
 152        1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 153        2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 154};
 155
 156/* Current limits array (in uA) for merged BMEM and BIO.
 157   Entry indexes corresponds to register values. */
 158static const int da9063_bmem_bio_merged_limits[] = {
 159        3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 160        4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 161};
 162
 163static int da9063_set_current_limit(struct regulator_dev *rdev,
 164                                                        int min_uA, int max_uA)
 165{
 166        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 167        const struct da9063_regulator_info *rinfo = regl->info;
 168        int n, tval;
 169
 170        for (n = 0; n < rinfo->n_current_limits; n++) {
 171                tval = rinfo->current_limits[n];
 172                if (tval >= min_uA && tval <= max_uA)
 173                        return regmap_field_write(regl->ilimit, n);
 174        }
 175
 176        return -EINVAL;
 177}
 178
 179static int da9063_get_current_limit(struct regulator_dev *rdev)
 180{
 181        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 182        const struct da9063_regulator_info *rinfo = regl->info;
 183        unsigned int sel;
 184        int ret;
 185
 186        ret = regmap_field_read(regl->ilimit, &sel);
 187        if (ret < 0)
 188                return ret;
 189
 190        if (sel >= rinfo->n_current_limits)
 191                sel = rinfo->n_current_limits - 1;
 192
 193        return rinfo->current_limits[sel];
 194}
 195
 196static 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
 224static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
 225{
 226        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 227        struct regmap_field *field;
 228        unsigned int val, mode = 0;
 229        int ret;
 230
 231        ret = regmap_field_read(regl->mode, &val);
 232        if (ret < 0)
 233                return ret;
 234
 235        switch (val) {
 236        default:
 237        case BUCK_MODE_MANUAL:
 238                mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 239                /* Sleep flag bit decides the mode */
 240                break;
 241        case BUCK_MODE_SLEEP:
 242                return REGULATOR_MODE_STANDBY;
 243        case BUCK_MODE_SYNC:
 244                return REGULATOR_MODE_FAST;
 245        case BUCK_MODE_AUTO:
 246                return REGULATOR_MODE_NORMAL;
 247        }
 248
 249        /* Detect current regulator state */
 250        ret = regmap_field_read(regl->suspend, &val);
 251        if (ret < 0)
 252                return 0;
 253
 254        /* Read regulator mode from proper register, depending on state */
 255        if (val)
 256                field = regl->suspend_sleep;
 257        else
 258                field = regl->sleep;
 259
 260        ret = regmap_field_read(field, &val);
 261        if (ret < 0)
 262                return 0;
 263
 264        if (val)
 265                mode &= REGULATOR_MODE_STANDBY;
 266        else
 267                mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
 268
 269        return mode;
 270}
 271
 272/*
 273 * LDOs use sleep flags - one for normal and one for suspend state.
 274 * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 275 */
 276
 277static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 278{
 279        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 280        unsigned val;
 281
 282        switch (mode) {
 283        case REGULATOR_MODE_NORMAL:
 284                val = 0;
 285                break;
 286        case REGULATOR_MODE_STANDBY:
 287                val = 1;
 288                break;
 289        default:
 290                return -EINVAL;
 291        }
 292
 293        return regmap_field_write(regl->sleep, val);
 294}
 295
 296static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 297{
 298        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 299        struct regmap_field *field;
 300        int ret, val;
 301
 302        /* Detect current regulator state */
 303        ret = regmap_field_read(regl->suspend, &val);
 304        if (ret < 0)
 305                return 0;
 306
 307        /* Read regulator mode from proper register, depending on state */
 308        if (val)
 309                field = regl->suspend_sleep;
 310        else
 311                field = regl->sleep;
 312
 313        ret = regmap_field_read(field, &val);
 314        if (ret < 0)
 315                return 0;
 316
 317        if (val)
 318                return REGULATOR_MODE_STANDBY;
 319        else
 320                return REGULATOR_MODE_NORMAL;
 321}
 322
 323static int da9063_buck_get_status(struct regulator_dev *rdev)
 324{
 325        int ret = regulator_is_enabled_regmap(rdev);
 326
 327        if (ret == 0) {
 328                ret = REGULATOR_STATUS_OFF;
 329        } else if (ret > 0) {
 330                ret = da9063_buck_get_mode(rdev);
 331                if (ret > 0)
 332                        ret = regulator_mode_to_status(ret);
 333                else if (ret == 0)
 334                        ret = -EIO;
 335        }
 336
 337        return ret;
 338}
 339
 340static int da9063_ldo_get_status(struct regulator_dev *rdev)
 341{
 342        int ret = regulator_is_enabled_regmap(rdev);
 343
 344        if (ret == 0) {
 345                ret = REGULATOR_STATUS_OFF;
 346        } else if (ret > 0) {
 347                ret = da9063_ldo_get_mode(rdev);
 348                if (ret > 0)
 349                        ret = regulator_mode_to_status(ret);
 350                else if (ret == 0)
 351                        ret = -EIO;
 352        }
 353
 354        return ret;
 355}
 356
 357static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 358{
 359        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 360        const struct da9063_regulator_info *rinfo = regl->info;
 361        int ret, sel;
 362
 363        sel = regulator_map_voltage_linear(rdev, uV, uV);
 364        if (sel < 0)
 365                return sel;
 366
 367        sel <<= ffs(rdev->desc->vsel_mask) - 1;
 368
 369        ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 370                                 rdev->desc->vsel_mask, sel);
 371
 372        return ret;
 373}
 374
 375static int da9063_suspend_enable(struct regulator_dev *rdev)
 376{
 377        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 378
 379        return regmap_field_write(regl->suspend, 1);
 380}
 381
 382static int da9063_suspend_disable(struct regulator_dev *rdev)
 383{
 384        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 385
 386        return regmap_field_write(regl->suspend, 0);
 387}
 388
 389static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 390{
 391        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 392        int val;
 393
 394        switch (mode) {
 395        case REGULATOR_MODE_FAST:
 396                val = BUCK_MODE_SYNC;
 397                break;
 398        case REGULATOR_MODE_NORMAL:
 399                val = BUCK_MODE_AUTO;
 400                break;
 401        case REGULATOR_MODE_STANDBY:
 402                val = BUCK_MODE_SLEEP;
 403                break;
 404        default:
 405                return -EINVAL;
 406        }
 407
 408        return regmap_field_write(regl->mode, val);
 409}
 410
 411static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 412{
 413        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 414        unsigned val;
 415
 416        switch (mode) {
 417        case REGULATOR_MODE_NORMAL:
 418                val = 0;
 419                break;
 420        case REGULATOR_MODE_STANDBY:
 421                val = 1;
 422                break;
 423        default:
 424                return -EINVAL;
 425        }
 426
 427        return regmap_field_write(regl->suspend_sleep, val);
 428}
 429
 430static const struct regulator_ops da9063_buck_ops = {
 431        .enable                 = regulator_enable_regmap,
 432        .disable                = regulator_disable_regmap,
 433        .is_enabled             = regulator_is_enabled_regmap,
 434        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 435        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 436        .list_voltage           = regulator_list_voltage_linear,
 437        .set_current_limit      = da9063_set_current_limit,
 438        .get_current_limit      = da9063_get_current_limit,
 439        .set_mode               = da9063_buck_set_mode,
 440        .get_mode               = da9063_buck_get_mode,
 441        .get_status             = da9063_buck_get_status,
 442        .set_suspend_voltage    = da9063_set_suspend_voltage,
 443        .set_suspend_enable     = da9063_suspend_enable,
 444        .set_suspend_disable    = da9063_suspend_disable,
 445        .set_suspend_mode       = da9063_buck_set_suspend_mode,
 446};
 447
 448static const struct regulator_ops da9063_ldo_ops = {
 449        .enable                 = regulator_enable_regmap,
 450        .disable                = regulator_disable_regmap,
 451        .is_enabled             = regulator_is_enabled_regmap,
 452        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 453        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 454        .list_voltage           = regulator_list_voltage_linear,
 455        .set_mode               = da9063_ldo_set_mode,
 456        .get_mode               = da9063_ldo_get_mode,
 457        .get_status             = da9063_ldo_get_status,
 458        .set_suspend_voltage    = da9063_set_suspend_voltage,
 459        .set_suspend_enable     = da9063_suspend_enable,
 460        .set_suspend_disable    = da9063_suspend_disable,
 461        .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 462};
 463
 464/* Info of regulators for DA9063 */
 465static const struct da9063_regulator_info da9063_regulator_info[] = {
 466        {
 467                DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 468                            da9063_buck_a_limits),
 469                DA9063_BUCK_COMMON_FIELDS(BCORE1),
 470                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 471                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 472                                 DA9063_BCORE1_ILIM_MASK),
 473        },
 474        {
 475                DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 476                            da9063_buck_a_limits),
 477                DA9063_BUCK_COMMON_FIELDS(BCORE2),
 478                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 479                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 480                                 DA9063_BCORE2_ILIM_MASK),
 481        },
 482        {
 483                DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 484                            da9063_buck_a_limits),
 485                DA9063_BUCK_COMMON_FIELDS(BPRO),
 486                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 487                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 488                                 DA9063_BPRO_ILIM_MASK),
 489        },
 490        {
 491                DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 492                            da9063_buck_b_limits),
 493                DA9063_BUCK_COMMON_FIELDS(BMEM),
 494                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 495                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 496                                 DA9063_BMEM_ILIM_MASK),
 497        },
 498        {
 499                DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 500                            da9063_buck_b_limits),
 501                DA9063_BUCK_COMMON_FIELDS(BIO),
 502                .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 503                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 504                                 DA9063_BIO_ILIM_MASK),
 505        },
 506        {
 507                DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 508                            da9063_buck_b_limits),
 509                DA9063_BUCK_COMMON_FIELDS(BPERI),
 510                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 511                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 512                                 DA9063_BPERI_ILIM_MASK),
 513        },
 514        {
 515                DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 516                            da9063_bcores_merged_limits),
 517                /* BCORES_MERGED uses the same register fields as BCORE1 */
 518                DA9063_BUCK_COMMON_FIELDS(BCORE1),
 519                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 520                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 521                                 DA9063_BCORE1_ILIM_MASK),
 522        },
 523        {
 524                DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 525                            da9063_bmem_bio_merged_limits),
 526                /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 527                DA9063_BUCK_COMMON_FIELDS(BMEM),
 528                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 529                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 530                                 DA9063_BMEM_ILIM_MASK),
 531        },
 532        {
 533                DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 534                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 535                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 536        },
 537        {
 538                DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 539                .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 540                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 541        },
 542        {
 543                DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 544                .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 545                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 546        },
 547        {
 548                DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 549                .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 550        },
 551        {
 552                DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 553                .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 554                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 555        },
 556
 557        /* The following LDOs are present only on DA9063, not on DA9063L */
 558        {
 559                DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 560                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 561        },
 562        {
 563                DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 564                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 565        },
 566        {
 567                DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 568                .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 569                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 570        },
 571        {
 572                DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 573                .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 574        },
 575        {
 576                DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 577                .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 578        },
 579
 580        {
 581                DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 582                .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 583        },
 584};
 585
 586/* Link chip model with regulators info table */
 587static struct da9063_dev_model regulators_models[] = {
 588        {
 589                .regulator_info = da9063_regulator_info,
 590                .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 591                .type = PMIC_TYPE_DA9063,
 592        },
 593        {
 594                .regulator_info = da9063_regulator_info,
 595                .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6,
 596                .type = PMIC_TYPE_DA9063L,
 597        },
 598        { }
 599};
 600
 601/* Regulator interrupt handlers */
 602static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 603{
 604        struct da9063_regulators *regulators = data;
 605        struct da9063 *hw = regulators->regulator[0].hw;
 606        struct da9063_regulator *regl;
 607        int bits, i , ret;
 608
 609        ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 610        if (ret < 0)
 611                return IRQ_NONE;
 612
 613        for (i = regulators->n_regulators - 1; i >= 0; i--) {
 614                regl = &regulators->regulator[i];
 615                if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 616                        continue;
 617
 618                if (BIT(regl->info->oc_event.lsb) & bits)
 619                        regulator_notifier_call_chain(regl->rdev,
 620                                        REGULATOR_EVENT_OVER_CURRENT, NULL);
 621        }
 622
 623        return IRQ_HANDLED;
 624}
 625
 626/*
 627 * Probing and Initialisation functions
 628 */
 629static const struct regulator_init_data *da9063_get_regulator_initdata(
 630                const struct da9063_regulators_pdata *regl_pdata, int id)
 631{
 632        int i;
 633
 634        for (i = 0; i < regl_pdata->n_regulators; i++) {
 635                if (id == regl_pdata->regulator_data[i].id)
 636                        return regl_pdata->regulator_data[i].initdata;
 637        }
 638
 639        return NULL;
 640}
 641
 642#ifdef CONFIG_OF
 643static struct of_regulator_match da9063_matches[] = {
 644        [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 645        [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 646        [DA9063_ID_BPRO]             = { .name = "bpro",            },
 647        [DA9063_ID_BMEM]             = { .name = "bmem",            },
 648        [DA9063_ID_BIO]              = { .name = "bio",             },
 649        [DA9063_ID_BPERI]            = { .name = "bperi",           },
 650        [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 651        [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 652        [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 653        [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 654        [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 655        [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 656        [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 657        /* The following LDOs are present only on DA9063, not on DA9063L */
 658        [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 659        [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 660        [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 661        [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 662        [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 663        [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 664};
 665
 666static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 667                struct platform_device *pdev,
 668                struct of_regulator_match **da9063_reg_matches)
 669{
 670        struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 671        struct da9063_regulators_pdata *pdata;
 672        struct da9063_regulator_data *rdata;
 673        struct device_node *node;
 674        int da9063_matches_len = ARRAY_SIZE(da9063_matches);
 675        int i, n, num;
 676
 677        if (da9063->type == PMIC_TYPE_DA9063L)
 678                da9063_matches_len -= 6;
 679
 680        node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 681        if (!node) {
 682                dev_err(&pdev->dev, "Regulators device node not found\n");
 683                return ERR_PTR(-ENODEV);
 684        }
 685
 686        num = of_regulator_match(&pdev->dev, node, da9063_matches,
 687                                 da9063_matches_len);
 688        of_node_put(node);
 689        if (num < 0) {
 690                dev_err(&pdev->dev, "Failed to match regulators\n");
 691                return ERR_PTR(-EINVAL);
 692        }
 693
 694        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 695        if (!pdata)
 696                return ERR_PTR(-ENOMEM);
 697
 698        pdata->regulator_data = devm_kcalloc(&pdev->dev,
 699                                        num, sizeof(*pdata->regulator_data),
 700                                        GFP_KERNEL);
 701        if (!pdata->regulator_data)
 702                return ERR_PTR(-ENOMEM);
 703        pdata->n_regulators = num;
 704
 705        n = 0;
 706        for (i = 0; i < da9063_matches_len; i++) {
 707                if (!da9063_matches[i].init_data)
 708                        continue;
 709
 710                rdata = &pdata->regulator_data[n];
 711                rdata->id = i;
 712                rdata->initdata = da9063_matches[i].init_data;
 713
 714                n++;
 715        }
 716
 717        *da9063_reg_matches = da9063_matches;
 718        return pdata;
 719}
 720#else
 721static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 722                struct platform_device *pdev,
 723                struct of_regulator_match **da9063_reg_matches)
 724{
 725        *da9063_reg_matches = NULL;
 726        return ERR_PTR(-ENODEV);
 727}
 728#endif
 729
 730static int da9063_regulator_probe(struct platform_device *pdev)
 731{
 732        struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 733        struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
 734        struct of_regulator_match *da9063_reg_matches = NULL;
 735        struct da9063_regulators_pdata *regl_pdata;
 736        const struct da9063_dev_model *model;
 737        struct da9063_regulators *regulators;
 738        struct da9063_regulator *regl;
 739        struct regulator_config config;
 740        bool bcores_merged, bmem_bio_merged;
 741        int id, irq, n, n_regulators, ret, val;
 742        size_t size;
 743
 744        regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
 745
 746        if (!regl_pdata)
 747                regl_pdata = da9063_parse_regulators_dt(pdev,
 748                                                        &da9063_reg_matches);
 749
 750        if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 751                dev_err(&pdev->dev,
 752                        "No regulators defined for the platform\n");
 753                return -ENODEV;
 754        }
 755
 756        /* Find regulators set for particular device model */
 757        for (model = regulators_models; model->regulator_info; model++) {
 758                if (model->type == da9063->type)
 759                        break;
 760        }
 761        if (!model->regulator_info) {
 762                dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 763                        da9063->type);
 764                return -ENODEV;
 765        }
 766
 767        ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 768        if (ret < 0) {
 769                dev_err(&pdev->dev,
 770                        "Error while reading BUCKs configuration\n");
 771                return ret;
 772        }
 773        bcores_merged = val & DA9063_BCORE_MERGE;
 774        bmem_bio_merged = val & DA9063_BUCK_MERGE;
 775
 776        n_regulators = model->n_regulators;
 777        if (bcores_merged)
 778                n_regulators -= 2; /* remove BCORE1, BCORE2 */
 779        else
 780                n_regulators--;    /* remove BCORES_MERGED */
 781        if (bmem_bio_merged)
 782                n_regulators -= 2; /* remove BMEM, BIO */
 783        else
 784                n_regulators--;    /* remove BMEM_BIO_MERGED */
 785
 786        /* Allocate memory required by usable regulators */
 787        size = sizeof(struct da9063_regulators) +
 788                n_regulators * sizeof(struct da9063_regulator);
 789        regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 790        if (!regulators)
 791                return -ENOMEM;
 792
 793        regulators->n_regulators = n_regulators;
 794        platform_set_drvdata(pdev, regulators);
 795
 796        /* Register all regulators declared in platform information */
 797        n = 0;
 798        id = 0;
 799        while (n < regulators->n_regulators) {
 800                /* Skip regulator IDs depending on merge mode configuration */
 801                switch (id) {
 802                case DA9063_ID_BCORE1:
 803                case DA9063_ID_BCORE2:
 804                        if (bcores_merged) {
 805                                id++;
 806                                continue;
 807                        }
 808                        break;
 809                case DA9063_ID_BMEM:
 810                case DA9063_ID_BIO:
 811                        if (bmem_bio_merged) {
 812                                id++;
 813                                continue;
 814                        }
 815                        break;
 816                case DA9063_ID_BCORES_MERGED:
 817                        if (!bcores_merged) {
 818                                id++;
 819                                continue;
 820                        }
 821                        break;
 822                case DA9063_ID_BMEM_BIO_MERGED:
 823                        if (!bmem_bio_merged) {
 824                                id++;
 825                                continue;
 826                        }
 827                        break;
 828                }
 829
 830                /* Initialise regulator structure */
 831                regl = &regulators->regulator[n];
 832                regl->hw = da9063;
 833                regl->info = &model->regulator_info[id];
 834                regl->desc = regl->info->desc;
 835                regl->desc.type = REGULATOR_VOLTAGE;
 836                regl->desc.owner = THIS_MODULE;
 837
 838                if (regl->info->mode.reg)
 839                        regl->mode = devm_regmap_field_alloc(&pdev->dev,
 840                                        da9063->regmap, regl->info->mode);
 841                if (regl->info->suspend.reg)
 842                        regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 843                                        da9063->regmap, regl->info->suspend);
 844                if (regl->info->sleep.reg)
 845                        regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 846                                        da9063->regmap, regl->info->sleep);
 847                if (regl->info->suspend_sleep.reg)
 848                        regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 849                                        da9063->regmap, regl->info->suspend_sleep);
 850                if (regl->info->ilimit.reg)
 851                        regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
 852                                        da9063->regmap, regl->info->ilimit);
 853
 854                /* Register regulator */
 855                memset(&config, 0, sizeof(config));
 856                config.dev = &pdev->dev;
 857                config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 858                config.driver_data = regl;
 859                if (da9063_reg_matches)
 860                        config.of_node = da9063_reg_matches[id].of_node;
 861                config.regmap = da9063->regmap;
 862                regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
 863                                                     &config);
 864                if (IS_ERR(regl->rdev)) {
 865                        dev_err(&pdev->dev,
 866                                "Failed to register %s regulator\n",
 867                                regl->desc.name);
 868                        return PTR_ERR(regl->rdev);
 869                }
 870                id++;
 871                n++;
 872        }
 873
 874        /* LDOs overcurrent event support */
 875        irq = platform_get_irq_byname(pdev, "LDO_LIM");
 876        if (irq < 0) {
 877                dev_err(&pdev->dev, "Failed to get IRQ.\n");
 878                return irq;
 879        }
 880
 881        ret = devm_request_threaded_irq(&pdev->dev, irq,
 882                                NULL, da9063_ldo_lim_event,
 883                                IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 884                                "LDO_LIM", regulators);
 885        if (ret) {
 886                dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
 887                return ret;
 888        }
 889
 890        return 0;
 891}
 892
 893static struct platform_driver da9063_regulator_driver = {
 894        .driver = {
 895                .name = DA9063_DRVNAME_REGULATORS,
 896        },
 897        .probe = da9063_regulator_probe,
 898};
 899
 900static int __init da9063_regulator_init(void)
 901{
 902        return platform_driver_register(&da9063_regulator_driver);
 903}
 904subsys_initcall(da9063_regulator_init);
 905
 906static void __exit da9063_regulator_cleanup(void)
 907{
 908        platform_driver_unregister(&da9063_regulator_driver);
 909}
 910module_exit(da9063_regulator_cleanup);
 911
 912
 913/* Module information */
 914MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 915MODULE_DESCRIPTION("DA9063 regulators driver");
 916MODULE_LICENSE("GPL");
 917MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS);
 918