drivers/regulator/bcm590xx-regulator.c

   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
 106 struct bcm590xx_board {
 107         struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
 108 };
 109
 110 /* LDO group A: supported voltages in microvolts */
 111 static 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 */
 117 static const unsigned int ldo_c_table[] = {
 118         3100000, 1800000, 2500000, 2700000, 2800000,
 119         2900000, 3000000, 3300000,
 120 };
 121
 122 static const unsigned int ldo_vbus[] = {
 123         5000000,
 124 };
 125
 126 /* DCDC group CSR: supported voltages in microvolts */
 127 static 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 */
 134 static 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 */
 142 static 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
 148 struct 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
 172 static 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
 202 struct bcm590xx_reg {
 203         struct regulator_desc *desc;
 204         struct bcm590xx *mfd;
 205 };
 206
 207 static 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
 217 static 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
 253 static const 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
 263 static const 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
 273 static const 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
 285 static 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
 315 static 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
 363 static 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
 453 static struct platform_driver bcm590xx_regulator_driver = {
 454         .driver = {
 455                 .name = "bcm590xx-vregs",
 456         },
 457         .probe = bcm590xx_probe,
 458 };
 459 module_platform_driver(bcm590xx_regulator_driver);
 460
 461 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 462 MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 463 MODULE_LICENSE("GPL v2");
 464 MODULE_ALIAS("platform:bcm590xx-vregs");