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 /* Register defs */
  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_REG_ENABLE     BIT(7)
  35
  36 #define BCM590XX_RFLDOCTRL      0x96
  37 #define BCM590XX_CSRVOUT1       0xc0
  38 #define BCM590XX_LDO_VSEL_MASK  GENMASK(5, 3)
  39 #define BCM590XX_SR_VSEL_MASK   GENMASK(5, 0)
  40
  41 /* LDO regulator IDs */
  42 #define BCM590XX_REG_RFLDO      0
  43 #define BCM590XX_REG_CAMLDO1    1
  44 #define BCM590XX_REG_CAMLDO2    2
  45 #define BCM590XX_REG_SIMLDO1    3
  46 #define BCM590XX_REG_SIMLDO2    4
  47 #define BCM590XX_REG_SDLDO      5
  48 #define BCM590XX_REG_SDXLDO     6
  49 #define BCM590XX_REG_MMCLDO1    7
  50 #define BCM590XX_REG_MMCLDO2    8
  51 #define BCM590XX_REG_AUDLDO     9
  52 #define BCM590XX_REG_MICLDO     10
  53 #define BCM590XX_REG_USBLDO     11
  54 #define BCM590XX_REG_VIBLDO     12
  55
  56 /* DCDC regulator IDs */
  57 #define BCM590XX_REG_CSR        13
  58 #define BCM590XX_REG_IOSR1      14
  59 #define BCM590XX_REG_IOSR2      15
  60 #define BCM590XX_REG_MSR        16
  61 #define BCM590XX_REG_SDSR1      17
  62 #define BCM590XX_REG_SDSR2      18
  63 #define BCM590XX_REG_VSR        19
  64
  65 #define BCM590XX_NUM_REGS       20
  66
  67 #define BCM590XX_REG_IS_LDO(n)  (n < BCM590XX_REG_CSR)
  68
  69 struct bcm590xx_board {
  70         struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
  71 };
  72
  73 /* LDO group A: supported voltages in microvolts */
  74 static const unsigned int ldo_a_table[] = {
  75         1200000, 1800000, 2500000, 2700000, 2800000,
  76         2900000, 3000000, 3300000,
  77 };
  78
  79 /* LDO group C: supported voltages in microvolts */
  80 static const unsigned int ldo_c_table[] = {
  81         3100000, 1800000, 2500000, 2700000, 2800000,
  82         2900000, 3000000, 3300000,
  83 };
  84
  85 /* DCDC group CSR: supported voltages in microvolts */
  86 static const struct regulator_linear_range dcdc_csr_ranges[] = {
  87         REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
  88         REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
  89         REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
  90 };
  91
  92 /* DCDC group IOSR1: supported voltages in microvolts */
  93 static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
  94         REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
  95         REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
  96         REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
  97         REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
  98 };
  99
 100 /* DCDC group SDSR1: supported voltages in microvolts */
 101 static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
 102         REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 103         REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
 104         REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
 105 };
 106
 107 struct bcm590xx_info {
 108         const char *name;
 109         const char *vin_name;
 110         u8 n_voltages;
 111         const unsigned int *volt_table;
 112         u8 n_linear_ranges;
 113         const struct regulator_linear_range *linear_ranges;
 114 };
 115
 116 #define BCM590XX_REG_TABLE(_name, _table) \
 117         { \
 118                 .name = #_name, \
 119                 .n_voltages = ARRAY_SIZE(_table), \
 120                 .volt_table = _table, \
 121         }
 122
 123 #define BCM590XX_REG_RANGES(_name, _ranges) \
 124         { \
 125                 .name = #_name, \
 126                 .n_linear_ranges = ARRAY_SIZE(_ranges), \
 127                 .linear_ranges = _ranges, \
 128         }
 129
 130 static struct bcm590xx_info bcm590xx_regs[] = {
 131         BCM590XX_REG_TABLE(rfldo, ldo_a_table),
 132         BCM590XX_REG_TABLE(camldo1, ldo_c_table),
 133         BCM590XX_REG_TABLE(camldo2, ldo_c_table),
 134         BCM590XX_REG_TABLE(simldo1, ldo_a_table),
 135         BCM590XX_REG_TABLE(simldo2, ldo_a_table),
 136         BCM590XX_REG_TABLE(sdldo, ldo_c_table),
 137         BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
 138         BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
 139         BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
 140         BCM590XX_REG_TABLE(audldo, ldo_a_table),
 141         BCM590XX_REG_TABLE(micldo, ldo_a_table),
 142         BCM590XX_REG_TABLE(usbldo, ldo_a_table),
 143         BCM590XX_REG_TABLE(vibldo, ldo_c_table),
 144         BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
 145         BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
 146         BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
 147         BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
 148         BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
 149         BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
 150         BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
 151 };
 152
 153 struct bcm590xx_reg {
 154         struct regulator_desc *desc;
 155         struct bcm590xx *mfd;
 156         struct bcm590xx_info **info;
 157 };
 158
 159 static int bcm590xx_get_vsel_register(int id)
 160 {
 161         if (BCM590XX_REG_IS_LDO(id))
 162                 return BCM590XX_RFLDOCTRL + id;
 163         else
 164                 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
 165 }
 166
 167 static int bcm590xx_get_enable_register(int id)
 168 {
 169         int reg = 0;
 170
 171         if (BCM590XX_REG_IS_LDO(id))
 172                 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
 173         else
 174                 switch (id) {
 175                 case BCM590XX_REG_CSR:
 176                         reg = BCM590XX_CSRPMCTRL1;
 177                         break;
 178                 case BCM590XX_REG_IOSR1:
 179                         reg = BCM590XX_IOSR1PMCTRL1;
 180                         break;
 181                 case BCM590XX_REG_IOSR2:
 182                         reg = BCM590XX_IOSR2PMCTRL1;
 183                         break;
 184                 case BCM590XX_REG_MSR:
 185                         reg = BCM590XX_MSRPMCTRL1;
 186                         break;
 187                 case BCM590XX_REG_SDSR1:
 188                         reg = BCM590XX_SDSR1PMCTRL1;
 189                         break;
 190                 case BCM590XX_REG_SDSR2:
 191                         reg = BCM590XX_SDSR2PMCTRL1;
 192                         break;
 193                 };
 194
 195         return reg;
 196 }
 197
 198 static struct regulator_ops bcm590xx_ops_ldo = {
 199         .is_enabled             = regulator_is_enabled_regmap,
 200         .enable                 = regulator_enable_regmap,
 201         .disable                = regulator_disable_regmap,
 202         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 203         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 204         .list_voltage           = regulator_list_voltage_table,
 205         .map_voltage            = regulator_map_voltage_iterate,
 206 };
 207
 208 static struct regulator_ops bcm590xx_ops_dcdc = {
 209         .is_enabled             = regulator_is_enabled_regmap,
 210         .enable                 = regulator_enable_regmap,
 211         .disable                = regulator_disable_regmap,
 212         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 213         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 214         .list_voltage           = regulator_list_voltage_linear_range,
 215         .map_voltage            = regulator_map_voltage_linear_range,
 216 };
 217
 218 #define BCM590XX_MATCH(_name, _id) \
 219         { \
 220                 .name = #_name, \
 221                 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
 222         }
 223
 224 static struct of_regulator_match bcm590xx_matches[] = {
 225         BCM590XX_MATCH(rfldo, RFLDO),
 226         BCM590XX_MATCH(camldo1, CAMLDO1),
 227         BCM590XX_MATCH(camldo2, CAMLDO2),
 228         BCM590XX_MATCH(simldo1, SIMLDO1),
 229         BCM590XX_MATCH(simldo2, SIMLDO2),
 230         BCM590XX_MATCH(sdldo, SDLDO),
 231         BCM590XX_MATCH(sdxldo, SDXLDO),
 232         BCM590XX_MATCH(mmcldo1, MMCLDO1),
 233         BCM590XX_MATCH(mmcldo2, MMCLDO2),
 234         BCM590XX_MATCH(audldo, AUDLDO),
 235         BCM590XX_MATCH(micldo, MICLDO),
 236         BCM590XX_MATCH(usbldo, USBLDO),
 237         BCM590XX_MATCH(vibldo, VIBLDO),
 238         BCM590XX_MATCH(csr, CSR),
 239         BCM590XX_MATCH(iosr1, IOSR1),
 240         BCM590XX_MATCH(iosr2, IOSR2),
 241         BCM590XX_MATCH(msr, MSR),
 242         BCM590XX_MATCH(sdsr1, SDSR1),
 243         BCM590XX_MATCH(sdsr2, SDSR2),
 244         BCM590XX_MATCH(vsr, VSR),
 245 };
 246
 247 static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
 248                 struct platform_device *pdev,
 249                 struct of_regulator_match **bcm590xx_reg_matches)
 250 {
 251         struct bcm590xx_board *data;
 252         struct device_node *np = pdev->dev.parent->of_node;
 253         struct device_node *regulators;
 254         struct of_regulator_match *matches = bcm590xx_matches;
 255         int count = ARRAY_SIZE(bcm590xx_matches);
 256         int idx = 0;
 257         int ret;
 258
 259         if (!np) {
 260                 dev_err(&pdev->dev, "of node not found\n");
 261                 return NULL;
 262         }
 263
 264         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 265         if (!data) {
 266                 dev_err(&pdev->dev, "failed to allocate regulator board data\n");
 267                 return NULL;
 268         }
 269
 270         np = of_node_get(np);
 271         regulators = of_get_child_by_name(np, "regulators");
 272         if (!regulators) {
 273                 dev_warn(&pdev->dev, "regulator node not found\n");
 274                 return NULL;
 275         }
 276
 277         ret = of_regulator_match(&pdev->dev, regulators, matches, count);
 278         of_node_put(regulators);
 279         if (ret < 0) {
 280                 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
 281                         ret);
 282                 return NULL;
 283         }
 284
 285         *bcm590xx_reg_matches = matches;
 286
 287         for (idx = 0; idx < count; idx++) {
 288                 if (!matches[idx].init_data || !matches[idx].of_node)
 289                         continue;
 290
 291                 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
 292         }
 293
 294         return data;
 295 }
 296
 297 static int bcm590xx_probe(struct platform_device *pdev)
 298 {
 299         struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
 300         struct bcm590xx_board *pmu_data = NULL;
 301         struct bcm590xx_reg *pmu;
 302         struct regulator_config config = { };
 303         struct bcm590xx_info *info;
 304         struct regulator_init_data *reg_data;
 305         struct regulator_dev *rdev;
 306         struct of_regulator_match *bcm590xx_reg_matches = NULL;
 307         int i;
 308
 309         pmu_data = bcm590xx_parse_dt_reg_data(pdev,
 310                                               &bcm590xx_reg_matches);
 311
 312         pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
 313         if (!pmu) {
 314                 dev_err(&pdev->dev, "Memory allocation failed for pmu\n");
 315                 return -ENOMEM;
 316         }
 317
 318         pmu->mfd = bcm590xx;
 319
 320         platform_set_drvdata(pdev, pmu);
 321
 322         pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
 323                         sizeof(struct regulator_desc), GFP_KERNEL);
 324         if (!pmu->desc) {
 325                 dev_err(&pdev->dev, "Memory alloc fails for desc\n");
 326                 return -ENOMEM;
 327         }
 328
 329         pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
 330                         sizeof(struct bcm590xx_info *), GFP_KERNEL);
 331         if (!pmu->info) {
 332                 dev_err(&pdev->dev, "Memory alloc fails for info\n");
 333                 return -ENOMEM;
 334         }
 335
 336         info = bcm590xx_regs;
 337
 338         for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
 339                 if (pmu_data)
 340                         reg_data = pmu_data->bcm590xx_pmu_init_data[i];
 341                 else
 342                         reg_data = NULL;
 343
 344                 /* Register the regulators */
 345                 pmu->info[i] = info;
 346
 347                 pmu->desc[i].name = info->name;
 348                 pmu->desc[i].supply_name = info->vin_name;
 349                 pmu->desc[i].id = i;
 350                 pmu->desc[i].volt_table = info->volt_table;
 351                 pmu->desc[i].n_voltages = info->n_voltages;
 352                 pmu->desc[i].linear_ranges = info->linear_ranges;
 353                 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
 354
 355                 if (BCM590XX_REG_IS_LDO(i)) {
 356                         pmu->desc[i].ops = &bcm590xx_ops_ldo;
 357                         pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
 358                 } else {
 359                         pmu->desc[i].ops = &bcm590xx_ops_dcdc;
 360                         pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
 361                 }
 362
 363                 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
 364                 pmu->desc[i].enable_is_inverted = true;
 365                 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
 366                 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
 367                 pmu->desc[i].type = REGULATOR_VOLTAGE;
 368                 pmu->desc[i].owner = THIS_MODULE;
 369
 370                 config.dev = bcm590xx->dev;
 371                 config.init_data = reg_data;
 372                 config.driver_data = pmu;
 373                 config.regmap = bcm590xx->regmap;
 374
 375                 if (bcm590xx_reg_matches)
 376                         config.of_node = bcm590xx_reg_matches[i].of_node;
 377
 378                 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
 379                                                &config);
 380                 if (IS_ERR(rdev)) {
 381                         dev_err(bcm590xx->dev,
 382                                 "failed to register %s regulator\n",
 383                                 pdev->name);
 384                         return PTR_ERR(rdev);
 385                 }
 386         }
 387
 388         return 0;
 389 }
 390
 391 static struct platform_driver bcm590xx_regulator_driver = {
 392         .driver = {
 393                 .name = "bcm590xx-vregs",
 394                 .owner = THIS_MODULE,
 395         },
 396         .probe = bcm590xx_probe,
 397 };
 398 module_platform_driver(bcm590xx_regulator_driver);
 399
 400 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 401 MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 402 MODULE_LICENSE("GPL v2");
 403 MODULE_ALIAS("platform:bcm590xx-vregs");