linux/drivers/regulator/da9063-regulator.c
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   1/*
   2 * Regulator driver for DA9063 PMIC series
   3 *
   4 * Copyright 2012 Dialog Semiconductors Ltd.
   5 * Copyright 2013 Philipp Zabel, Pengutronix
   6 *
   7 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
   8 *
   9 *  This program is free software; you can redistribute  it and/or modify it
  10 *  under  the terms of  the GNU General  Public License as published by the
  11 *  Free Software Foundation;  either version 2 of the  License, or (at your
  12 *  option) any later version.
  13 *
  14 */
  15#include <linux/kernel.h>
  16#include <linux/module.h>
  17#include <linux/init.h>
  18#include <linux/err.h>
  19#include <linux/slab.h>
  20#include <linux/of.h>
  21#include <linux/platform_device.h>
  22#include <linux/regmap.h>
  23#include <linux/regulator/driver.h>
  24#include <linux/regulator/machine.h>
  25#include <linux/regulator/of_regulator.h>
  26#include <linux/mfd/da9063/core.h>
  27#include <linux/mfd/da9063/pdata.h>
  28#include <linux/mfd/da9063/registers.h>
  29
  30
  31/* Definition for registering regmap bit fields using a mask */
  32#define BFIELD(_reg, _mask) \
  33        REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
  34                sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)
  35
  36/* Regulator capabilities and registers description */
  37struct da9063_regulator_info {
  38        struct regulator_desc desc;
  39
  40        /* Current limiting */
  41        unsigned        n_current_limits;
  42        const int       *current_limits;
  43
  44        /* DA9063 main register fields */
  45        struct reg_field mode;          /* buck mode of operation */
  46        struct reg_field suspend;
  47        struct reg_field sleep;
  48        struct reg_field suspend_sleep;
  49        unsigned int suspend_vsel_reg;
  50        struct reg_field ilimit;
  51
  52        /* DA9063 event detection bit */
  53        struct reg_field oc_event;
  54};
  55
  56/* Macros for LDO */
  57#define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
  58        .desc.id = chip##_ID_##regl_name, \
  59        .desc.name = __stringify(chip##_##regl_name), \
  60        .desc.ops = &da9063_ldo_ops, \
  61        .desc.min_uV = (min_mV) * 1000, \
  62        .desc.uV_step = (step_mV) * 1000, \
  63        .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1), \
  64        .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  65        .desc.enable_mask = DA9063_LDO_EN, \
  66        .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  67        .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
  68        .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
  69        .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
  70        .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
  71        .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
  72
  73/* Macros for voltage DC/DC converters (BUCKs) */
  74#define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
  75        .desc.id = chip##_ID_##regl_name, \
  76        .desc.name = __stringify(chip##_##regl_name), \
  77        .desc.ops = &da9063_buck_ops, \
  78        .desc.min_uV = (min_mV) * 1000, \
  79        .desc.uV_step = (step_mV) * 1000, \
  80        .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
  81        .current_limits = limits_array, \
  82        .n_current_limits = ARRAY_SIZE(limits_array)
  83
  84#define DA9063_BUCK_COMMON_FIELDS(regl_name) \
  85        .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
  86        .desc.enable_mask = DA9063_BUCK_EN, \
  87        .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
  88        .desc.vsel_mask = DA9063_VBUCK_MASK, \
  89        .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
  90        .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
  91        .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
  92        .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
  93        .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)
  94
  95/* Defines asignment of regulators info table to chip model */
  96struct da9063_dev_model {
  97        const struct da9063_regulator_info      *regulator_info;
  98        unsigned                                n_regulators;
  99        unsigned                                dev_model;
 100};
 101
 102/* Single regulator settings */
 103struct da9063_regulator {
 104        struct regulator_desc                   desc;
 105        struct regulator_dev                    *rdev;
 106        struct da9063                           *hw;
 107        const struct da9063_regulator_info      *info;
 108
 109        struct regmap_field                     *mode;
 110        struct regmap_field                     *suspend;
 111        struct regmap_field                     *sleep;
 112        struct regmap_field                     *suspend_sleep;
 113        struct regmap_field                     *ilimit;
 114};
 115
 116/* Encapsulates all information for the regulators driver */
 117struct da9063_regulators {
 118        int                                     irq_ldo_lim;
 119        int                                     irq_uvov;
 120
 121        unsigned                                n_regulators;
 122        /* Array size to be defined during init. Keep at end. */
 123        struct da9063_regulator                 regulator[0];
 124};
 125
 126/* BUCK modes for DA9063 */
 127enum {
 128        BUCK_MODE_MANUAL,       /* 0 */
 129        BUCK_MODE_SLEEP,        /* 1 */
 130        BUCK_MODE_SYNC,         /* 2 */
 131        BUCK_MODE_AUTO          /* 3 */
 132};
 133
 134/* Regulator operations */
 135
 136/* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
 137   Entry indexes corresponds to register values. */
 138static const int da9063_buck_a_limits[] = {
 139         500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
 140        1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
 141};
 142
 143/* Current limits array (in uA) for BMEM, BIO, BPERI.
 144   Entry indexes corresponds to register values. */
 145static const int da9063_buck_b_limits[] = {
 146        1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
 147        2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
 148};
 149
 150/* Current limits array (in uA) for merged BCORE1 and BCORE2.
 151   Entry indexes corresponds to register values. */
 152static const int da9063_bcores_merged_limits[] = {
 153        1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
 154        2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
 155};
 156
 157/* Current limits array (in uA) for merged BMEM and BIO.
 158   Entry indexes corresponds to register values. */
 159static const int da9063_bmem_bio_merged_limits[] = {
 160        3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
 161        4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 162};
 163
 164static int da9063_set_current_limit(struct regulator_dev *rdev,
 165                                                        int min_uA, int max_uA)
 166{
 167        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 168        const struct da9063_regulator_info *rinfo = regl->info;
 169        int n, tval;
 170
 171        for (n = 0; n < rinfo->n_current_limits; n++) {
 172                tval = rinfo->current_limits[n];
 173                if (tval >= min_uA && tval <= max_uA)
 174                        return regmap_field_write(regl->ilimit, n);
 175        }
 176
 177        return -EINVAL;
 178}
 179
 180static int da9063_get_current_limit(struct regulator_dev *rdev)
 181{
 182        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 183        const struct da9063_regulator_info *rinfo = regl->info;
 184        unsigned int sel;
 185        int ret;
 186
 187        ret = regmap_field_read(regl->ilimit, &sel);
 188        if (ret < 0)
 189                return ret;
 190
 191        if (sel >= rinfo->n_current_limits)
 192                sel = rinfo->n_current_limits - 1;
 193
 194        return rinfo->current_limits[sel];
 195}
 196
 197static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
 198{
 199        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 200        unsigned val;
 201
 202        switch (mode) {
 203        case REGULATOR_MODE_FAST:
 204                val = BUCK_MODE_SYNC;
 205                break;
 206        case REGULATOR_MODE_NORMAL:
 207                val = BUCK_MODE_AUTO;
 208                break;
 209        case REGULATOR_MODE_STANDBY:
 210                val = BUCK_MODE_SLEEP;
 211                break;
 212        default:
 213                return -EINVAL;
 214        }
 215
 216        return regmap_field_write(regl->mode, val);
 217}
 218
 219/*
 220 * Bucks use single mode register field for normal operation
 221 * and suspend state.
 222 * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 223 */
 224
 225static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
 226{
 227        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 228        struct regmap_field *field;
 229        unsigned int val, mode = 0;
 230        int ret;
 231
 232        ret = regmap_field_read(regl->mode, &val);
 233        if (ret < 0)
 234                return ret;
 235
 236        switch (val) {
 237        default:
 238        case BUCK_MODE_MANUAL:
 239                mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 240                /* Sleep flag bit decides the mode */
 241                break;
 242        case BUCK_MODE_SLEEP:
 243                return REGULATOR_MODE_STANDBY;
 244        case BUCK_MODE_SYNC:
 245                return REGULATOR_MODE_FAST;
 246        case BUCK_MODE_AUTO:
 247                return REGULATOR_MODE_NORMAL;
 248        }
 249
 250        /* Detect current regulator state */
 251        ret = regmap_field_read(regl->suspend, &val);
 252        if (ret < 0)
 253                return 0;
 254
 255        /* Read regulator mode from proper register, depending on state */
 256        if (val)
 257                field = regl->suspend_sleep;
 258        else
 259                field = regl->sleep;
 260
 261        ret = regmap_field_read(field, &val);
 262        if (ret < 0)
 263                return 0;
 264
 265        if (val)
 266                mode &= REGULATOR_MODE_STANDBY;
 267        else
 268                mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
 269
 270        return mode;
 271}
 272
 273/*
 274 * LDOs use sleep flags - one for normal and one for suspend state.
 275 * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 276 */
 277
 278static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
 279{
 280        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 281        unsigned val;
 282
 283        switch (mode) {
 284        case REGULATOR_MODE_NORMAL:
 285                val = 0;
 286                break;
 287        case REGULATOR_MODE_STANDBY:
 288                val = 1;
 289                break;
 290        default:
 291                return -EINVAL;
 292        }
 293
 294        return regmap_field_write(regl->sleep, val);
 295}
 296
 297static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
 298{
 299        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 300        struct regmap_field *field;
 301        int ret, val;
 302
 303        /* Detect current regulator state */
 304        ret = regmap_field_read(regl->suspend, &val);
 305        if (ret < 0)
 306                return 0;
 307
 308        /* Read regulator mode from proper register, depending on state */
 309        if (val)
 310                field = regl->suspend_sleep;
 311        else
 312                field = regl->sleep;
 313
 314        ret = regmap_field_read(field, &val);
 315        if (ret < 0)
 316                return 0;
 317
 318        if (val)
 319                return REGULATOR_MODE_STANDBY;
 320        else
 321                return REGULATOR_MODE_NORMAL;
 322}
 323
 324static int da9063_buck_get_status(struct regulator_dev *rdev)
 325{
 326        int ret = regulator_is_enabled_regmap(rdev);
 327
 328        if (ret == 0) {
 329                ret = REGULATOR_STATUS_OFF;
 330        } else if (ret > 0) {
 331                ret = da9063_buck_get_mode(rdev);
 332                if (ret > 0)
 333                        ret = regulator_mode_to_status(ret);
 334                else if (ret == 0)
 335                        ret = -EIO;
 336        }
 337
 338        return ret;
 339}
 340
 341static int da9063_ldo_get_status(struct regulator_dev *rdev)
 342{
 343        int ret = regulator_is_enabled_regmap(rdev);
 344
 345        if (ret == 0) {
 346                ret = REGULATOR_STATUS_OFF;
 347        } else if (ret > 0) {
 348                ret = da9063_ldo_get_mode(rdev);
 349                if (ret > 0)
 350                        ret = regulator_mode_to_status(ret);
 351                else if (ret == 0)
 352                        ret = -EIO;
 353        }
 354
 355        return ret;
 356}
 357
 358static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 359{
 360        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 361        const struct da9063_regulator_info *rinfo = regl->info;
 362        int ret, sel;
 363
 364        sel = regulator_map_voltage_linear(rdev, uV, uV);
 365        if (sel < 0)
 366                return -EINVAL;
 367
 368        sel <<= ffs(rdev->desc->vsel_mask) - 1;
 369
 370        ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
 371                                 rdev->desc->vsel_mask, sel);
 372
 373        return ret;
 374}
 375
 376static int da9063_suspend_enable(struct regulator_dev *rdev)
 377{
 378        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 379
 380        return regmap_field_write(regl->suspend, 1);
 381}
 382
 383static int da9063_suspend_disable(struct regulator_dev *rdev)
 384{
 385        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 386
 387        return regmap_field_write(regl->suspend, 0);
 388}
 389
 390static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 391{
 392        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 393        int val;
 394
 395        switch (mode) {
 396        case REGULATOR_MODE_FAST:
 397                val = BUCK_MODE_SYNC;
 398                break;
 399        case REGULATOR_MODE_NORMAL:
 400                val = BUCK_MODE_AUTO;
 401                break;
 402        case REGULATOR_MODE_STANDBY:
 403                val = BUCK_MODE_SLEEP;
 404                break;
 405        default:
 406                return -EINVAL;
 407        }
 408
 409        return regmap_field_write(regl->mode, val);
 410}
 411
 412static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
 413{
 414        struct da9063_regulator *regl = rdev_get_drvdata(rdev);
 415        unsigned val;
 416
 417        switch (mode) {
 418        case REGULATOR_MODE_NORMAL:
 419                val = 0;
 420                break;
 421        case REGULATOR_MODE_STANDBY:
 422                val = 1;
 423                break;
 424        default:
 425                return -EINVAL;
 426        }
 427
 428        return regmap_field_write(regl->suspend_sleep, val);
 429}
 430
 431static struct regulator_ops da9063_buck_ops = {
 432        .enable                 = regulator_enable_regmap,
 433        .disable                = regulator_disable_regmap,
 434        .is_enabled             = regulator_is_enabled_regmap,
 435        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 436        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 437        .list_voltage           = regulator_list_voltage_linear,
 438        .set_current_limit      = da9063_set_current_limit,
 439        .get_current_limit      = da9063_get_current_limit,
 440        .set_mode               = da9063_buck_set_mode,
 441        .get_mode               = da9063_buck_get_mode,
 442        .get_status             = da9063_buck_get_status,
 443        .set_suspend_voltage    = da9063_set_suspend_voltage,
 444        .set_suspend_enable     = da9063_suspend_enable,
 445        .set_suspend_disable    = da9063_suspend_disable,
 446        .set_suspend_mode       = da9063_buck_set_suspend_mode,
 447};
 448
 449static struct regulator_ops da9063_ldo_ops = {
 450        .enable                 = regulator_enable_regmap,
 451        .disable                = regulator_disable_regmap,
 452        .is_enabled             = regulator_is_enabled_regmap,
 453        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 454        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 455        .list_voltage           = regulator_list_voltage_linear,
 456        .set_mode               = da9063_ldo_set_mode,
 457        .get_mode               = da9063_ldo_get_mode,
 458        .get_status             = da9063_ldo_get_status,
 459        .set_suspend_voltage    = da9063_set_suspend_voltage,
 460        .set_suspend_enable     = da9063_suspend_enable,
 461        .set_suspend_disable    = da9063_suspend_disable,
 462        .set_suspend_mode       = da9063_ldo_set_suspend_mode,
 463};
 464
 465/* Info of regulators for DA9063 */
 466static const struct da9063_regulator_info da9063_regulator_info[] = {
 467        {
 468                DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
 469                            da9063_buck_a_limits),
 470                DA9063_BUCK_COMMON_FIELDS(BCORE1),
 471                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 472                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 473                                 DA9063_BCORE1_ILIM_MASK),
 474        },
 475        {
 476                DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
 477                            da9063_buck_a_limits),
 478                DA9063_BUCK_COMMON_FIELDS(BCORE2),
 479                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
 480                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 481                                 DA9063_BCORE2_ILIM_MASK),
 482        },
 483        {
 484                DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
 485                            da9063_buck_a_limits),
 486                DA9063_BUCK_COMMON_FIELDS(BPRO),
 487                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
 488                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 489                                 DA9063_BPRO_ILIM_MASK),
 490        },
 491        {
 492                DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
 493                            da9063_buck_b_limits),
 494                DA9063_BUCK_COMMON_FIELDS(BMEM),
 495                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 496                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 497                                 DA9063_BMEM_ILIM_MASK),
 498        },
 499        {
 500                DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
 501                            da9063_buck_b_limits),
 502                DA9063_BUCK_COMMON_FIELDS(BIO),
 503                .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
 504                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 505                                 DA9063_BIO_ILIM_MASK),
 506        },
 507        {
 508                DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
 509                            da9063_buck_b_limits),
 510                DA9063_BUCK_COMMON_FIELDS(BPERI),
 511                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
 512                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
 513                                 DA9063_BPERI_ILIM_MASK),
 514        },
 515        {
 516                DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
 517                            da9063_bcores_merged_limits),
 518                /* BCORES_MERGED uses the same register fields as BCORE1 */
 519                DA9063_BUCK_COMMON_FIELDS(BCORE1),
 520                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
 521                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
 522                                 DA9063_BCORE1_ILIM_MASK),
 523        },
 524        {
 525                DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
 526                            da9063_bmem_bio_merged_limits),
 527                /* BMEM_BIO_MERGED uses the same register fields as BMEM */
 528                DA9063_BUCK_COMMON_FIELDS(BMEM),
 529                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
 530                .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
 531                                 DA9063_BMEM_ILIM_MASK),
 532        },
 533        {
 534                DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
 535                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
 536        },
 537        {
 538                DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
 539                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
 540        },
 541        {
 542                DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
 543                .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
 544                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
 545        },
 546        {
 547                DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
 548                .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
 549                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
 550        },
 551        {
 552                DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
 553                .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
 554        },
 555        {
 556                DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
 557                .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
 558        },
 559        {
 560                DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
 561                .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
 562                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
 563        },
 564        {
 565                DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
 566                .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
 567                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
 568        },
 569        {
 570                DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
 571                .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
 572        },
 573        {
 574                DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
 575                .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
 576        },
 577        {
 578                DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
 579                .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
 580                .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
 581        },
 582};
 583
 584/* Link chip model with regulators info table */
 585static struct da9063_dev_model regulators_models[] = {
 586        {
 587                .regulator_info = da9063_regulator_info,
 588                .n_regulators = ARRAY_SIZE(da9063_regulator_info),
 589                .dev_model = PMIC_DA9063,
 590        },
 591        { }
 592};
 593
 594/* Regulator interrupt handlers */
 595static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
 596{
 597        struct da9063_regulators *regulators = data;
 598        struct da9063 *hw = regulators->regulator[0].hw;
 599        struct da9063_regulator *regl;
 600        int bits, i , ret;
 601
 602        ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
 603        if (ret < 0)
 604                return IRQ_NONE;
 605
 606        for (i = regulators->n_regulators - 1; i >= 0; i--) {
 607                regl = &regulators->regulator[i];
 608                if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
 609                        continue;
 610
 611                if (BIT(regl->info->oc_event.lsb) & bits)
 612                        regulator_notifier_call_chain(regl->rdev,
 613                                        REGULATOR_EVENT_OVER_CURRENT, NULL);
 614        }
 615
 616        return IRQ_HANDLED;
 617}
 618
 619/*
 620 * Probing and Initialisation functions
 621 */
 622static const struct regulator_init_data *da9063_get_regulator_initdata(
 623                const struct da9063_regulators_pdata *regl_pdata, int id)
 624{
 625        int i;
 626
 627        for (i = 0; i < regl_pdata->n_regulators; i++) {
 628                if (id == regl_pdata->regulator_data[i].id)
 629                        return regl_pdata->regulator_data[i].initdata;
 630        }
 631
 632        return NULL;
 633}
 634
 635#ifdef CONFIG_OF
 636static struct of_regulator_match da9063_matches[] = {
 637        [DA9063_ID_BCORE1]           = { .name = "bcore1"           },
 638        [DA9063_ID_BCORE2]           = { .name = "bcore2"           },
 639        [DA9063_ID_BPRO]             = { .name = "bpro",            },
 640        [DA9063_ID_BMEM]             = { .name = "bmem",            },
 641        [DA9063_ID_BIO]              = { .name = "bio",             },
 642        [DA9063_ID_BPERI]            = { .name = "bperi",           },
 643        [DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
 644        [DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
 645        [DA9063_ID_LDO1]             = { .name = "ldo1",            },
 646        [DA9063_ID_LDO2]             = { .name = "ldo2",            },
 647        [DA9063_ID_LDO3]             = { .name = "ldo3",            },
 648        [DA9063_ID_LDO4]             = { .name = "ldo4",            },
 649        [DA9063_ID_LDO5]             = { .name = "ldo5",            },
 650        [DA9063_ID_LDO6]             = { .name = "ldo6",            },
 651        [DA9063_ID_LDO7]             = { .name = "ldo7",            },
 652        [DA9063_ID_LDO8]             = { .name = "ldo8",            },
 653        [DA9063_ID_LDO9]             = { .name = "ldo9",            },
 654        [DA9063_ID_LDO10]            = { .name = "ldo10",           },
 655        [DA9063_ID_LDO11]            = { .name = "ldo11",           },
 656};
 657
 658static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 659                struct platform_device *pdev,
 660                struct of_regulator_match **da9063_reg_matches)
 661{
 662        struct da9063_regulators_pdata *pdata;
 663        struct da9063_regulator_data *rdata;
 664        struct device_node *node;
 665        int i, n, num;
 666
 667        node = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
 668        if (!node) {
 669                dev_err(&pdev->dev, "Regulators device node not found\n");
 670                return ERR_PTR(-ENODEV);
 671        }
 672
 673        num = of_regulator_match(&pdev->dev, node, da9063_matches,
 674                                 ARRAY_SIZE(da9063_matches));
 675        if (num < 0) {
 676                dev_err(&pdev->dev, "Failed to match regulators\n");
 677                return ERR_PTR(-EINVAL);
 678        }
 679
 680        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 681        if (!pdata)
 682                return ERR_PTR(-ENOMEM);
 683
 684        pdata->regulator_data = devm_kzalloc(&pdev->dev,
 685                                        num * sizeof(*pdata->regulator_data),
 686                                        GFP_KERNEL);
 687        if (!pdata->regulator_data)
 688                return ERR_PTR(-ENOMEM);
 689        pdata->n_regulators = num;
 690
 691        n = 0;
 692        for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
 693                if (!da9063_matches[i].init_data)
 694                        continue;
 695
 696                rdata = &pdata->regulator_data[n];
 697                rdata->id = i;
 698                rdata->initdata = da9063_matches[i].init_data;
 699
 700                n++;
 701        };
 702
 703        *da9063_reg_matches = da9063_matches;
 704        return pdata;
 705}
 706#else
 707static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
 708                struct platform_device *pdev,
 709                struct of_regulator_match **da9063_reg_matches)
 710{
 711        da9063_reg_matches = NULL;
 712        return ERR_PTR(-ENODEV);
 713}
 714#endif
 715
 716static int da9063_regulator_probe(struct platform_device *pdev)
 717{
 718        struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 719        struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
 720        struct of_regulator_match *da9063_reg_matches;
 721        struct da9063_regulators_pdata *regl_pdata;
 722        const struct da9063_dev_model *model;
 723        struct da9063_regulators *regulators;
 724        struct da9063_regulator *regl;
 725        struct regulator_config config;
 726        bool bcores_merged, bmem_bio_merged;
 727        int id, irq, n, n_regulators, ret, val;
 728        size_t size;
 729
 730        regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
 731
 732        if (!regl_pdata)
 733                regl_pdata = da9063_parse_regulators_dt(pdev,
 734                                                        &da9063_reg_matches);
 735
 736        if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
 737                dev_err(&pdev->dev,
 738                        "No regulators defined for the platform\n");
 739                return PTR_ERR(regl_pdata);
 740        }
 741
 742        /* Find regulators set for particular device model */
 743        for (model = regulators_models; model->regulator_info; model++) {
 744                if (model->dev_model == da9063->model)
 745                        break;
 746        }
 747        if (!model->regulator_info) {
 748                dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
 749                        da9063->model);
 750                return -ENODEV;
 751        }
 752
 753        ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
 754        if (ret < 0) {
 755                dev_err(&pdev->dev,
 756                        "Error while reading BUCKs configuration\n");
 757                return -EIO;
 758        }
 759        bcores_merged = val & DA9063_BCORE_MERGE;
 760        bmem_bio_merged = val & DA9063_BUCK_MERGE;
 761
 762        n_regulators = model->n_regulators;
 763        if (bcores_merged)
 764                n_regulators -= 2; /* remove BCORE1, BCORE2 */
 765        else
 766                n_regulators--;    /* remove BCORES_MERGED */
 767        if (bmem_bio_merged)
 768                n_regulators -= 2; /* remove BMEM, BIO */
 769        else
 770                n_regulators--;    /* remove BMEM_BIO_MERGED */
 771
 772        /* Allocate memory required by usable regulators */
 773        size = sizeof(struct da9063_regulators) +
 774                n_regulators * sizeof(struct da9063_regulator);
 775        regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 776        if (!regulators) {
 777                dev_err(&pdev->dev, "No memory for regulators\n");
 778                return -ENOMEM;
 779        }
 780
 781        regulators->n_regulators = n_regulators;
 782        platform_set_drvdata(pdev, regulators);
 783
 784        /* Register all regulators declared in platform information */
 785        n = 0;
 786        id = 0;
 787        while (n < regulators->n_regulators) {
 788                /* Skip regulator IDs depending on merge mode configuration */
 789                switch (id) {
 790                case DA9063_ID_BCORE1:
 791                case DA9063_ID_BCORE2:
 792                        if (bcores_merged) {
 793                                id++;
 794                                continue;
 795                        }
 796                        break;
 797                case DA9063_ID_BMEM:
 798                case DA9063_ID_BIO:
 799                        if (bmem_bio_merged) {
 800                                id++;
 801                                continue;
 802                        }
 803                        break;
 804                case DA9063_ID_BCORES_MERGED:
 805                        if (!bcores_merged) {
 806                                id++;
 807                                continue;
 808                        }
 809                        break;
 810                case DA9063_ID_BMEM_BIO_MERGED:
 811                        if (!bmem_bio_merged) {
 812                                id++;
 813                                continue;
 814                        }
 815                        break;
 816                }
 817
 818                /* Initialise regulator structure */
 819                regl = &regulators->regulator[n];
 820                regl->hw = da9063;
 821                regl->info = &model->regulator_info[id];
 822                regl->desc = regl->info->desc;
 823                regl->desc.type = REGULATOR_VOLTAGE;
 824                regl->desc.owner = THIS_MODULE;
 825
 826                if (regl->info->mode.reg)
 827                        regl->mode = devm_regmap_field_alloc(&pdev->dev,
 828                                        da9063->regmap, regl->info->mode);
 829                if (regl->info->suspend.reg)
 830                        regl->suspend = devm_regmap_field_alloc(&pdev->dev,
 831                                        da9063->regmap, regl->info->suspend);
 832                if (regl->info->sleep.reg)
 833                        regl->sleep = devm_regmap_field_alloc(&pdev->dev,
 834                                        da9063->regmap, regl->info->sleep);
 835                if (regl->info->suspend_sleep.reg)
 836                        regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
 837                                        da9063->regmap, regl->info->suspend_sleep);
 838                if (regl->info->ilimit.reg)
 839                        regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
 840                                        da9063->regmap, regl->info->ilimit);
 841
 842                /* Register regulator */
 843                memset(&config, 0, sizeof(config));
 844                config.dev = &pdev->dev;
 845                config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
 846                config.driver_data = regl;
 847                if (da9063_reg_matches)
 848                        config.of_node = da9063_reg_matches[id].of_node;
 849                config.regmap = da9063->regmap;
 850                regl->rdev = regulator_register(&regl->desc, &config);
 851                if (IS_ERR(regl->rdev)) {
 852                        dev_err(&pdev->dev,
 853                                "Failed to register %s regulator\n",
 854                                regl->desc.name);
 855                        ret = PTR_ERR(regl->rdev);
 856                        goto err;
 857                }
 858                id++;
 859                n++;
 860        }
 861
 862        /* LDOs overcurrent event support */
 863        irq = platform_get_irq_byname(pdev, "LDO_LIM");
 864        if (irq < 0) {
 865                ret = irq;
 866                dev_err(&pdev->dev, "Failed to get IRQ.\n");
 867                goto err;
 868        }
 869
 870        regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq);
 871        if (regulators->irq_ldo_lim >= 0) {
 872                ret = request_threaded_irq(regulators->irq_ldo_lim,
 873                                           NULL, da9063_ldo_lim_event,
 874                                           IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 875                                           "LDO_LIM", regulators);
 876                if (ret) {
 877                        dev_err(&pdev->dev,
 878                                        "Failed to request LDO_LIM IRQ.\n");
 879                        regulators->irq_ldo_lim = -ENXIO;
 880                }
 881        }
 882
 883        return 0;
 884
 885err:
 886        /* Wind back regulators registeration */
 887        while (--n >= 0)
 888                regulator_unregister(regulators->regulator[n].rdev);
 889
 890        return ret;
 891}
 892
 893static int da9063_regulator_remove(struct platform_device *pdev)
 894{
 895        struct da9063_regulators *regulators = platform_get_drvdata(pdev);
 896        struct da9063_regulator *regl;
 897
 898        free_irq(regulators->irq_ldo_lim, regulators);
 899        free_irq(regulators->irq_uvov, regulators);
 900
 901        for (regl = &regulators->regulator[regulators->n_regulators - 1];
 902             regl >= &regulators->regulator[0]; regl--)
 903                regulator_unregister(regl->rdev);
 904
 905        return 0;
 906}
 907
 908static struct platform_driver da9063_regulator_driver = {
 909        .driver = {
 910                .name = DA9063_DRVNAME_REGULATORS,
 911                .owner = THIS_MODULE,
 912        },
 913        .probe = da9063_regulator_probe,
 914        .remove = da9063_regulator_remove,
 915};
 916
 917static int __init da9063_regulator_init(void)
 918{
 919        return platform_driver_register(&da9063_regulator_driver);
 920}
 921subsys_initcall(da9063_regulator_init);
 922
 923static void __exit da9063_regulator_cleanup(void)
 924{
 925        platform_driver_unregister(&da9063_regulator_driver);
 926}
 927module_exit(da9063_regulator_cleanup);
 928
 929
 930/* Module information */
 931MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
 932MODULE_DESCRIPTION("DA9063 regulators driver");
 933MODULE_LICENSE("GPL");
 934MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);
 935
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