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