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         struct bcm590xx_info **info;
 206 };
 207
 208 static int bcm590xx_get_vsel_register(int id)
 209 {
 210         if (BCM590XX_REG_IS_LDO(id))
 211                 return BCM590XX_RFLDOCTRL + id;
 212         else if (BCM590XX_REG_IS_GPLDO(id))
 213                 return BCM590XX_GPLDO1CTRL + id;
 214         else
 215                 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
 216 }
 217
 218 static int bcm590xx_get_enable_register(int id)
 219 {
 220         int reg = 0;
 221
 222         if (BCM590XX_REG_IS_LDO(id))
 223                 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
 224         else if (BCM590XX_REG_IS_GPLDO(id))
 225                 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
 226         else
 227                 switch (id) {
 228                 case BCM590XX_REG_CSR:
 229                         reg = BCM590XX_CSRPMCTRL1;
 230                         break;
 231                 case BCM590XX_REG_IOSR1:
 232                         reg = BCM590XX_IOSR1PMCTRL1;
 233                         break;
 234                 case BCM590XX_REG_IOSR2:
 235                         reg = BCM590XX_IOSR2PMCTRL1;
 236                         break;
 237                 case BCM590XX_REG_MSR:
 238                         reg = BCM590XX_MSRPMCTRL1;
 239                         break;
 240                 case BCM590XX_REG_SDSR1:
 241                         reg = BCM590XX_SDSR1PMCTRL1;
 242                         break;
 243                 case BCM590XX_REG_SDSR2:
 244                         reg = BCM590XX_SDSR2PMCTRL1;
 245                         break;
 246                 case BCM590XX_REG_VBUS:
 247                         reg = BCM590XX_OTG_CTRL;
 248                 };
 249
 250
 251         return reg;
 252 }
 253
 254 static struct regulator_ops bcm590xx_ops_ldo = {
 255         .is_enabled             = regulator_is_enabled_regmap,
 256         .enable                 = regulator_enable_regmap,
 257         .disable                = regulator_disable_regmap,
 258         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 259         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 260         .list_voltage           = regulator_list_voltage_table,
 261         .map_voltage            = regulator_map_voltage_iterate,
 262 };
 263
 264 static struct regulator_ops bcm590xx_ops_dcdc = {
 265         .is_enabled             = regulator_is_enabled_regmap,
 266         .enable                 = regulator_enable_regmap,
 267         .disable                = regulator_disable_regmap,
 268         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 269         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 270         .list_voltage           = regulator_list_voltage_linear_range,
 271         .map_voltage            = regulator_map_voltage_linear_range,
 272 };
 273
 274 static struct regulator_ops bcm590xx_ops_vbus = {
 275         .is_enabled             = regulator_is_enabled_regmap,
 276         .enable                 = regulator_enable_regmap,
 277         .disable                = regulator_disable_regmap,
 278 };
 279
 280 #define BCM590XX_MATCH(_name, _id) \
 281         { \
 282                 .name = #_name, \
 283                 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
 284         }
 285
 286 static struct of_regulator_match bcm590xx_matches[] = {
 287         BCM590XX_MATCH(rfldo, RFLDO),
 288         BCM590XX_MATCH(camldo1, CAMLDO1),
 289         BCM590XX_MATCH(camldo2, CAMLDO2),
 290         BCM590XX_MATCH(simldo1, SIMLDO1),
 291         BCM590XX_MATCH(simldo2, SIMLDO2),
 292         BCM590XX_MATCH(sdldo, SDLDO),
 293         BCM590XX_MATCH(sdxldo, SDXLDO),
 294         BCM590XX_MATCH(mmcldo1, MMCLDO1),
 295         BCM590XX_MATCH(mmcldo2, MMCLDO2),
 296         BCM590XX_MATCH(audldo, AUDLDO),
 297         BCM590XX_MATCH(micldo, MICLDO),
 298         BCM590XX_MATCH(usbldo, USBLDO),
 299         BCM590XX_MATCH(vibldo, VIBLDO),
 300         BCM590XX_MATCH(csr, CSR),
 301         BCM590XX_MATCH(iosr1, IOSR1),
 302         BCM590XX_MATCH(iosr2, IOSR2),
 303         BCM590XX_MATCH(msr, MSR),
 304         BCM590XX_MATCH(sdsr1, SDSR1),
 305         BCM590XX_MATCH(sdsr2, SDSR2),
 306         BCM590XX_MATCH(vsr, VSR),
 307         BCM590XX_MATCH(gpldo1, GPLDO1),
 308         BCM590XX_MATCH(gpldo2, GPLDO2),
 309         BCM590XX_MATCH(gpldo3, GPLDO3),
 310         BCM590XX_MATCH(gpldo4, GPLDO4),
 311         BCM590XX_MATCH(gpldo5, GPLDO5),
 312         BCM590XX_MATCH(gpldo6, GPLDO6),
 313         BCM590XX_MATCH(vbus, VBUS),
 314 };
 315
 316 static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
 317                 struct platform_device *pdev,
 318                 struct of_regulator_match **bcm590xx_reg_matches)
 319 {
 320         struct bcm590xx_board *data;
 321         struct device_node *np = pdev->dev.parent->of_node;
 322         struct device_node *regulators;
 323         struct of_regulator_match *matches = bcm590xx_matches;
 324         int count = ARRAY_SIZE(bcm590xx_matches);
 325         int idx = 0;
 326         int ret;
 327
 328         if (!np) {
 329                 dev_err(&pdev->dev, "of node not found\n");
 330                 return NULL;
 331         }
 332
 333         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 334         if (!data)
 335                 return NULL;
 336
 337         np = of_node_get(np);
 338         regulators = of_get_child_by_name(np, "regulators");
 339         if (!regulators) {
 340                 dev_warn(&pdev->dev, "regulator node not found\n");
 341                 return NULL;
 342         }
 343
 344         ret = of_regulator_match(&pdev->dev, regulators, matches, count);
 345         of_node_put(regulators);
 346         if (ret < 0) {
 347                 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
 348                         ret);
 349                 return NULL;
 350         }
 351
 352         *bcm590xx_reg_matches = matches;
 353
 354         for (idx = 0; idx < count; idx++) {
 355                 if (!matches[idx].init_data || !matches[idx].of_node)
 356                         continue;
 357
 358                 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
 359         }
 360
 361         return data;
 362 }
 363
 364 static int bcm590xx_probe(struct platform_device *pdev)
 365 {
 366         struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
 367         struct bcm590xx_board *pmu_data = NULL;
 368         struct bcm590xx_reg *pmu;
 369         struct regulator_config config = { };
 370         struct bcm590xx_info *info;
 371         struct regulator_init_data *reg_data;
 372         struct regulator_dev *rdev;
 373         struct of_regulator_match *bcm590xx_reg_matches = NULL;
 374         int i;
 375
 376         pmu_data = bcm590xx_parse_dt_reg_data(pdev,
 377                                               &bcm590xx_reg_matches);
 378
 379         pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
 380         if (!pmu)
 381                 return -ENOMEM;
 382
 383         pmu->mfd = bcm590xx;
 384
 385         platform_set_drvdata(pdev, pmu);
 386
 387         pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
 388                         sizeof(struct regulator_desc), GFP_KERNEL);
 389         if (!pmu->desc)
 390                 return -ENOMEM;
 391
 392         pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
 393                         sizeof(struct bcm590xx_info *), GFP_KERNEL);
 394         if (!pmu->info)
 395                 return -ENOMEM;
 396
 397         info = bcm590xx_regs;
 398
 399         for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
 400                 if (pmu_data)
 401                         reg_data = pmu_data->bcm590xx_pmu_init_data[i];
 402                 else
 403                         reg_data = NULL;
 404
 405                 /* Register the regulators */
 406                 pmu->info[i] = info;
 407
 408                 pmu->desc[i].name = info->name;
 409                 pmu->desc[i].supply_name = info->vin_name;
 410                 pmu->desc[i].id = i;
 411                 pmu->desc[i].volt_table = info->volt_table;
 412                 pmu->desc[i].n_voltages = info->n_voltages;
 413                 pmu->desc[i].linear_ranges = info->linear_ranges;
 414                 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
 415
 416                 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
 417                         pmu->desc[i].ops = &bcm590xx_ops_ldo;
 418                         pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
 419                 } else if (BCM590XX_REG_IS_VBUS(i))
 420                         pmu->desc[i].ops = &bcm590xx_ops_vbus;
 421                 else {
 422                         pmu->desc[i].ops = &bcm590xx_ops_dcdc;
 423                         pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
 424                 }
 425
 426                 if (BCM590XX_REG_IS_VBUS(i))
 427                         pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
 428                 else {
 429                         pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
 430                         pmu->desc[i].enable_is_inverted = true;
 431                         pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
 432                 }
 433                 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
 434                 pmu->desc[i].type = REGULATOR_VOLTAGE;
 435                 pmu->desc[i].owner = THIS_MODULE;
 436
 437                 config.dev = bcm590xx->dev;
 438                 config.init_data = reg_data;
 439                 config.driver_data = pmu;
 440                 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
 441                         config.regmap = bcm590xx->regmap_sec;
 442                 else
 443                         config.regmap = bcm590xx->regmap_pri;
 444
 445                 if (bcm590xx_reg_matches)
 446                         config.of_node = bcm590xx_reg_matches[i].of_node;
 447
 448                 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
 449                                                &config);
 450                 if (IS_ERR(rdev)) {
 451                         dev_err(bcm590xx->dev,
 452                                 "failed to register %s regulator\n",
 453                                 pdev->name);
 454                         return PTR_ERR(rdev);
 455                 }
 456         }
 457
 458         return 0;
 459 }
 460
 461 static struct platform_driver bcm590xx_regulator_driver = {
 462         .driver = {
 463                 .name = "bcm590xx-vregs",
 464                 .owner = THIS_MODULE,
 465         },
 466         .probe = bcm590xx_probe,
 467 };
 468 module_platform_driver(bcm590xx_regulator_driver);
 469
 470 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 471 MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 472 MODULE_LICENSE("GPL v2");
 473 MODULE_ALIAS("platform:bcm590xx-vregs");