linux/drivers/regulator/bcm590xx-regulator.c
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   1/*
   2 * Broadcom BCM590xx regulator driver
   3 *
   4 * Copyright 2014 Linaro Limited
   5 * Author: Matt Porter <mporter@linaro.org>
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under  the terms of the GNU General  Public License as published by the
   9 * Free Software Foundation;  either version 2 of the License, or (at your
  10 * option) any later version.
  11 */
  12
  13#include <linux/err.h>
  14#include <linux/init.h>
  15#include <linux/kernel.h>
  16#include <linux/mfd/bcm590xx.h>
  17#include <linux/module.h>
  18#include <linux/of.h>
  19#include <linux/platform_device.h>
  20#include <linux/regulator/driver.h>
  21#include <linux/regulator/machine.h>
  22#include <linux/regulator/of_regulator.h>
  23#include <linux/slab.h>
  24
  25/* I2C slave 0 registers */
  26#define BCM590XX_RFLDOPMCTRL1   0x60
  27#define BCM590XX_IOSR1PMCTRL1   0x7a
  28#define BCM590XX_IOSR2PMCTRL1   0x7c
  29#define BCM590XX_CSRPMCTRL1     0x7e
  30#define BCM590XX_SDSR1PMCTRL1   0x82
  31#define BCM590XX_SDSR2PMCTRL1   0x86
  32#define BCM590XX_MSRPMCTRL1     0x8a
  33#define BCM590XX_VSRPMCTRL1     0x8e
  34#define BCM590XX_RFLDOCTRL      0x96
  35#define BCM590XX_CSRVOUT1       0xc0
  36
  37/* I2C slave 1 registers */
  38#define BCM590XX_GPLDO5PMCTRL1  0x16
  39#define BCM590XX_GPLDO6PMCTRL1  0x18
  40#define BCM590XX_GPLDO1CTRL     0x1a
  41#define BCM590XX_GPLDO2CTRL     0x1b
  42#define BCM590XX_GPLDO3CTRL     0x1c
  43#define BCM590XX_GPLDO4CTRL     0x1d
  44#define BCM590XX_GPLDO5CTRL     0x1e
  45#define BCM590XX_GPLDO6CTRL     0x1f
  46#define BCM590XX_OTG_CTRL       0x40
  47#define BCM590XX_GPLDO1PMCTRL1  0x57
  48#define BCM590XX_GPLDO2PMCTRL1  0x59
  49#define BCM590XX_GPLDO3PMCTRL1  0x5b
  50#define BCM590XX_GPLDO4PMCTRL1  0x5d
  51
  52#define BCM590XX_REG_ENABLE     BIT(7)
  53#define BCM590XX_VBUS_ENABLE    BIT(2)
  54#define BCM590XX_LDO_VSEL_MASK  GENMASK(5, 3)
  55#define BCM590XX_SR_VSEL_MASK   GENMASK(5, 0)
  56
  57/*
  58 * RFLDO to VSR regulators are
  59 * accessed via I2C slave 0
  60 */
  61
  62/* LDO regulator IDs */
  63#define BCM590XX_REG_RFLDO      0
  64#define BCM590XX_REG_CAMLDO1    1
  65#define BCM590XX_REG_CAMLDO2    2
  66#define BCM590XX_REG_SIMLDO1    3
  67#define BCM590XX_REG_SIMLDO2    4
  68#define BCM590XX_REG_SDLDO      5
  69#define BCM590XX_REG_SDXLDO     6
  70#define BCM590XX_REG_MMCLDO1    7
  71#define BCM590XX_REG_MMCLDO2    8
  72#define BCM590XX_REG_AUDLDO     9
  73#define BCM590XX_REG_MICLDO     10
  74#define BCM590XX_REG_USBLDO     11
  75#define BCM590XX_REG_VIBLDO     12
  76
  77/* DCDC regulator IDs */
  78#define BCM590XX_REG_CSR        13
  79#define BCM590XX_REG_IOSR1      14
  80#define BCM590XX_REG_IOSR2      15
  81#define BCM590XX_REG_MSR        16
  82#define BCM590XX_REG_SDSR1      17
  83#define BCM590XX_REG_SDSR2      18
  84#define BCM590XX_REG_VSR        19
  85
  86/*
  87 * GPLDO1 to VBUS regulators are
  88 * accessed via I2C slave 1
  89 */
  90
  91#define BCM590XX_REG_GPLDO1     20
  92#define BCM590XX_REG_GPLDO2     21
  93#define BCM590XX_REG_GPLDO3     22
  94#define BCM590XX_REG_GPLDO4     23
  95#define BCM590XX_REG_GPLDO5     24
  96#define BCM590XX_REG_GPLDO6     25
  97#define BCM590XX_REG_VBUS       26
  98
  99#define BCM590XX_NUM_REGS       27
 100
 101#define BCM590XX_REG_IS_LDO(n)  (n < BCM590XX_REG_CSR)
 102#define BCM590XX_REG_IS_GPLDO(n) \
 103        ((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))
 104#define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS)
 105
 106struct bcm590xx_board {
 107        struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
 108};
 109
 110/* LDO group A: supported voltages in microvolts */
 111static const unsigned int ldo_a_table[] = {
 112        1200000, 1800000, 2500000, 2700000, 2800000,
 113        2900000, 3000000, 3300000,
 114};
 115
 116/* LDO group C: supported voltages in microvolts */
 117static const unsigned int ldo_c_table[] = {
 118        3100000, 1800000, 2500000, 2700000, 2800000,
 119        2900000, 3000000, 3300000,
 120};
 121
 122static const unsigned int ldo_vbus[] = {
 123        5000000,
 124};
 125
 126/* DCDC group CSR: supported voltages in microvolts */
 127static const struct regulator_linear_range dcdc_csr_ranges[] = {
 128        REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 129        REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
 130        REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
 131};
 132
 133/* DCDC group IOSR1: supported voltages in microvolts */
 134static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
 135        REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
 136        REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
 137        REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
 138        REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
 139};
 140
 141/* DCDC group SDSR1: supported voltages in microvolts */
 142static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
 143        REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 144        REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
 145        REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
 146};
 147
 148struct bcm590xx_info {
 149        const char *name;
 150        const char *vin_name;
 151        u8 n_voltages;
 152        const unsigned int *volt_table;
 153        u8 n_linear_ranges;
 154        const struct regulator_linear_range *linear_ranges;
 155};
 156
 157#define BCM590XX_REG_TABLE(_name, _table) \
 158        { \
 159                .name = #_name, \
 160                .n_voltages = ARRAY_SIZE(_table), \
 161                .volt_table = _table, \
 162        }
 163
 164#define BCM590XX_REG_RANGES(_name, _ranges) \
 165        { \
 166                .name = #_name, \
 167                .n_voltages = 64, \
 168                .n_linear_ranges = ARRAY_SIZE(_ranges), \
 169                .linear_ranges = _ranges, \
 170        }
 171
 172static struct bcm590xx_info bcm590xx_regs[] = {
 173        BCM590XX_REG_TABLE(rfldo, ldo_a_table),
 174        BCM590XX_REG_TABLE(camldo1, ldo_c_table),
 175        BCM590XX_REG_TABLE(camldo2, ldo_c_table),
 176        BCM590XX_REG_TABLE(simldo1, ldo_a_table),
 177        BCM590XX_REG_TABLE(simldo2, ldo_a_table),
 178        BCM590XX_REG_TABLE(sdldo, ldo_c_table),
 179        BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
 180        BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
 181        BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
 182        BCM590XX_REG_TABLE(audldo, ldo_a_table),
 183        BCM590XX_REG_TABLE(micldo, ldo_a_table),
 184        BCM590XX_REG_TABLE(usbldo, ldo_a_table),
 185        BCM590XX_REG_TABLE(vibldo, ldo_c_table),
 186        BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
 187        BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
 188        BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
 189        BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
 190        BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
 191        BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
 192        BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
 193        BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
 194        BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
 195        BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
 196        BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
 197        BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
 198        BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
 199        BCM590XX_REG_TABLE(vbus, ldo_vbus),
 200};
 201
 202struct bcm590xx_reg {
 203        struct regulator_desc *desc;
 204        struct bcm590xx *mfd;
 205};
 206
 207static int bcm590xx_get_vsel_register(int id)
 208{
 209        if (BCM590XX_REG_IS_LDO(id))
 210                return BCM590XX_RFLDOCTRL + id;
 211        else if (BCM590XX_REG_IS_GPLDO(id))
 212                return BCM590XX_GPLDO1CTRL + id;
 213        else
 214                return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
 215}
 216
 217static int bcm590xx_get_enable_register(int id)
 218{
 219        int reg = 0;
 220
 221        if (BCM590XX_REG_IS_LDO(id))
 222                reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
 223        else if (BCM590XX_REG_IS_GPLDO(id))
 224                reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
 225        else
 226                switch (id) {
 227                case BCM590XX_REG_CSR:
 228                        reg = BCM590XX_CSRPMCTRL1;
 229                        break;
 230                case BCM590XX_REG_IOSR1:
 231                        reg = BCM590XX_IOSR1PMCTRL1;
 232                        break;
 233                case BCM590XX_REG_IOSR2:
 234                        reg = BCM590XX_IOSR2PMCTRL1;
 235                        break;
 236                case BCM590XX_REG_MSR:
 237                        reg = BCM590XX_MSRPMCTRL1;
 238                        break;
 239                case BCM590XX_REG_SDSR1:
 240                        reg = BCM590XX_SDSR1PMCTRL1;
 241                        break;
 242                case BCM590XX_REG_SDSR2:
 243                        reg = BCM590XX_SDSR2PMCTRL1;
 244                        break;
 245                case BCM590XX_REG_VBUS:
 246                        reg = BCM590XX_OTG_CTRL;
 247                };
 248
 249
 250        return reg;
 251}
 252
 253static struct regulator_ops bcm590xx_ops_ldo = {
 254        .is_enabled             = regulator_is_enabled_regmap,
 255        .enable                 = regulator_enable_regmap,
 256        .disable                = regulator_disable_regmap,
 257        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 258        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 259        .list_voltage           = regulator_list_voltage_table,
 260        .map_voltage            = regulator_map_voltage_iterate,
 261};
 262
 263static struct regulator_ops bcm590xx_ops_dcdc = {
 264        .is_enabled             = regulator_is_enabled_regmap,
 265        .enable                 = regulator_enable_regmap,
 266        .disable                = regulator_disable_regmap,
 267        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 268        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 269        .list_voltage           = regulator_list_voltage_linear_range,
 270        .map_voltage            = regulator_map_voltage_linear_range,
 271};
 272
 273static struct regulator_ops bcm590xx_ops_vbus = {
 274        .is_enabled             = regulator_is_enabled_regmap,
 275        .enable                 = regulator_enable_regmap,
 276        .disable                = regulator_disable_regmap,
 277};
 278
 279#define BCM590XX_MATCH(_name, _id) \
 280        { \
 281                .name = #_name, \
 282                .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
 283        }
 284
 285static struct of_regulator_match bcm590xx_matches[] = {
 286        BCM590XX_MATCH(rfldo, RFLDO),
 287        BCM590XX_MATCH(camldo1, CAMLDO1),
 288        BCM590XX_MATCH(camldo2, CAMLDO2),
 289        BCM590XX_MATCH(simldo1, SIMLDO1),
 290        BCM590XX_MATCH(simldo2, SIMLDO2),
 291        BCM590XX_MATCH(sdldo, SDLDO),
 292        BCM590XX_MATCH(sdxldo, SDXLDO),
 293        BCM590XX_MATCH(mmcldo1, MMCLDO1),
 294        BCM590XX_MATCH(mmcldo2, MMCLDO2),
 295        BCM590XX_MATCH(audldo, AUDLDO),
 296        BCM590XX_MATCH(micldo, MICLDO),
 297        BCM590XX_MATCH(usbldo, USBLDO),
 298        BCM590XX_MATCH(vibldo, VIBLDO),
 299        BCM590XX_MATCH(csr, CSR),
 300        BCM590XX_MATCH(iosr1, IOSR1),
 301        BCM590XX_MATCH(iosr2, IOSR2),
 302        BCM590XX_MATCH(msr, MSR),
 303        BCM590XX_MATCH(sdsr1, SDSR1),
 304        BCM590XX_MATCH(sdsr2, SDSR2),
 305        BCM590XX_MATCH(vsr, VSR),
 306        BCM590XX_MATCH(gpldo1, GPLDO1),
 307        BCM590XX_MATCH(gpldo2, GPLDO2),
 308        BCM590XX_MATCH(gpldo3, GPLDO3),
 309        BCM590XX_MATCH(gpldo4, GPLDO4),
 310        BCM590XX_MATCH(gpldo5, GPLDO5),
 311        BCM590XX_MATCH(gpldo6, GPLDO6),
 312        BCM590XX_MATCH(vbus, VBUS),
 313};
 314
 315static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
 316                struct platform_device *pdev,
 317                struct of_regulator_match **bcm590xx_reg_matches)
 318{
 319        struct bcm590xx_board *data;
 320        struct device_node *np = pdev->dev.parent->of_node;
 321        struct device_node *regulators;
 322        struct of_regulator_match *matches = bcm590xx_matches;
 323        int count = ARRAY_SIZE(bcm590xx_matches);
 324        int idx = 0;
 325        int ret;
 326
 327        if (!np) {
 328                dev_err(&pdev->dev, "of node not found\n");
 329                return NULL;
 330        }
 331
 332        data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 333        if (!data)
 334                return NULL;
 335
 336        np = of_node_get(np);
 337        regulators = of_get_child_by_name(np, "regulators");
 338        if (!regulators) {
 339                dev_warn(&pdev->dev, "regulator node not found\n");
 340                return NULL;
 341        }
 342
 343        ret = of_regulator_match(&pdev->dev, regulators, matches, count);
 344        of_node_put(regulators);
 345        if (ret < 0) {
 346                dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
 347                        ret);
 348                return NULL;
 349        }
 350
 351        *bcm590xx_reg_matches = matches;
 352
 353        for (idx = 0; idx < count; idx++) {
 354                if (!matches[idx].init_data || !matches[idx].of_node)
 355                        continue;
 356
 357                data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
 358        }
 359
 360        return data;
 361}
 362
 363static int bcm590xx_probe(struct platform_device *pdev)
 364{
 365        struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
 366        struct bcm590xx_board *pmu_data = NULL;
 367        struct bcm590xx_reg *pmu;
 368        struct regulator_config config = { };
 369        struct bcm590xx_info *info;
 370        struct regulator_init_data *reg_data;
 371        struct regulator_dev *rdev;
 372        struct of_regulator_match *bcm590xx_reg_matches = NULL;
 373        int i;
 374
 375        pmu_data = bcm590xx_parse_dt_reg_data(pdev,
 376                                              &bcm590xx_reg_matches);
 377
 378        pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
 379        if (!pmu)
 380                return -ENOMEM;
 381
 382        pmu->mfd = bcm590xx;
 383
 384        platform_set_drvdata(pdev, pmu);
 385
 386        pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
 387                        sizeof(struct regulator_desc), GFP_KERNEL);
 388        if (!pmu->desc)
 389                return -ENOMEM;
 390
 391        info = bcm590xx_regs;
 392
 393        for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
 394                if (pmu_data)
 395                        reg_data = pmu_data->bcm590xx_pmu_init_data[i];
 396                else
 397                        reg_data = NULL;
 398
 399                /* Register the regulators */
 400                pmu->desc[i].name = info->name;
 401                pmu->desc[i].supply_name = info->vin_name;
 402                pmu->desc[i].id = i;
 403                pmu->desc[i].volt_table = info->volt_table;
 404                pmu->desc[i].n_voltages = info->n_voltages;
 405                pmu->desc[i].linear_ranges = info->linear_ranges;
 406                pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
 407
 408                if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
 409                        pmu->desc[i].ops = &bcm590xx_ops_ldo;
 410                        pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
 411                } else if (BCM590XX_REG_IS_VBUS(i))
 412                        pmu->desc[i].ops = &bcm590xx_ops_vbus;
 413                else {
 414                        pmu->desc[i].ops = &bcm590xx_ops_dcdc;
 415                        pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
 416                }
 417
 418                if (BCM590XX_REG_IS_VBUS(i))
 419                        pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
 420                else {
 421                        pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
 422                        pmu->desc[i].enable_is_inverted = true;
 423                        pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
 424                }
 425                pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
 426                pmu->desc[i].type = REGULATOR_VOLTAGE;
 427                pmu->desc[i].owner = THIS_MODULE;
 428
 429                config.dev = bcm590xx->dev;
 430                config.init_data = reg_data;
 431                config.driver_data = pmu;
 432                if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
 433                        config.regmap = bcm590xx->regmap_sec;
 434                else
 435                        config.regmap = bcm590xx->regmap_pri;
 436
 437                if (bcm590xx_reg_matches)
 438                        config.of_node = bcm590xx_reg_matches[i].of_node;
 439
 440                rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
 441                                               &config);
 442                if (IS_ERR(rdev)) {
 443                        dev_err(bcm590xx->dev,
 444                                "failed to register %s regulator\n",
 445                                pdev->name);
 446                        return PTR_ERR(rdev);
 447                }
 448        }
 449
 450        return 0;
 451}
 452
 453static struct platform_driver bcm590xx_regulator_driver = {
 454        .driver = {
 455                .name = "bcm590xx-vregs",
 456        },
 457        .probe = bcm590xx_probe,
 458};
 459module_platform_driver(bcm590xx_regulator_driver);
 460
 461MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 462MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 463MODULE_LICENSE("GPL v2");
 464MODULE_ALIAS("platform:bcm590xx-vregs");
 465
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