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 /* LDO group A: supported voltages in microvolts */
 107 static const unsigned int ldo_a_table[] = {
 108         1200000, 1800000, 2500000, 2700000, 2800000,
 109         2900000, 3000000, 3300000,
 110 };
 111
 112 /* LDO group C: supported voltages in microvolts */
 113 static const unsigned int ldo_c_table[] = {
 114         3100000, 1800000, 2500000, 2700000, 2800000,
 115         2900000, 3000000, 3300000,
 116 };
 117
 118 static const unsigned int ldo_vbus[] = {
 119         5000000,
 120 };
 121
 122 /* DCDC group CSR: supported voltages in microvolts */
 123 static const struct regulator_linear_range dcdc_csr_ranges[] = {
 124         REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 125         REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
 126         REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
 127 };
 128
 129 /* DCDC group IOSR1: supported voltages in microvolts */
 130 static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
 131         REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
 132         REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
 133         REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
 134         REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
 135 };
 136
 137 /* DCDC group SDSR1: supported voltages in microvolts */
 138 static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
 139         REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 140         REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
 141         REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
 142 };
 143
 144 struct bcm590xx_info {
 145         const char *name;
 146         const char *vin_name;
 147         u8 n_voltages;
 148         const unsigned int *volt_table;
 149         u8 n_linear_ranges;
 150         const struct regulator_linear_range *linear_ranges;
 151 };
 152
 153 #define BCM590XX_REG_TABLE(_name, _table) \
 154         { \
 155                 .name = #_name, \
 156                 .n_voltages = ARRAY_SIZE(_table), \
 157                 .volt_table = _table, \
 158         }
 159
 160 #define BCM590XX_REG_RANGES(_name, _ranges) \
 161         { \
 162                 .name = #_name, \
 163                 .n_voltages = 64, \
 164                 .n_linear_ranges = ARRAY_SIZE(_ranges), \
 165                 .linear_ranges = _ranges, \
 166         }
 167
 168 static struct bcm590xx_info bcm590xx_regs[] = {
 169         BCM590XX_REG_TABLE(rfldo, ldo_a_table),
 170         BCM590XX_REG_TABLE(camldo1, ldo_c_table),
 171         BCM590XX_REG_TABLE(camldo2, ldo_c_table),
 172         BCM590XX_REG_TABLE(simldo1, ldo_a_table),
 173         BCM590XX_REG_TABLE(simldo2, ldo_a_table),
 174         BCM590XX_REG_TABLE(sdldo, ldo_c_table),
 175         BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
 176         BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
 177         BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
 178         BCM590XX_REG_TABLE(audldo, ldo_a_table),
 179         BCM590XX_REG_TABLE(micldo, ldo_a_table),
 180         BCM590XX_REG_TABLE(usbldo, ldo_a_table),
 181         BCM590XX_REG_TABLE(vibldo, ldo_c_table),
 182         BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
 183         BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
 184         BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
 185         BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
 186         BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
 187         BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
 188         BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
 189         BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
 190         BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
 191         BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
 192         BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
 193         BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
 194         BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
 195         BCM590XX_REG_TABLE(vbus, ldo_vbus),
 196 };
 197
 198 struct bcm590xx_reg {
 199         struct regulator_desc *desc;
 200         struct bcm590xx *mfd;
 201 };
 202
 203 static int bcm590xx_get_vsel_register(int id)
 204 {
 205         if (BCM590XX_REG_IS_LDO(id))
 206                 return BCM590XX_RFLDOCTRL + id;
 207         else if (BCM590XX_REG_IS_GPLDO(id))
 208                 return BCM590XX_GPLDO1CTRL + id;
 209         else
 210                 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
 211 }
 212
 213 static int bcm590xx_get_enable_register(int id)
 214 {
 215         int reg = 0;
 216
 217         if (BCM590XX_REG_IS_LDO(id))
 218                 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
 219         else if (BCM590XX_REG_IS_GPLDO(id))
 220                 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
 221         else
 222                 switch (id) {
 223                 case BCM590XX_REG_CSR:
 224                         reg = BCM590XX_CSRPMCTRL1;
 225                         break;
 226                 case BCM590XX_REG_IOSR1:
 227                         reg = BCM590XX_IOSR1PMCTRL1;
 228                         break;
 229                 case BCM590XX_REG_IOSR2:
 230                         reg = BCM590XX_IOSR2PMCTRL1;
 231                         break;
 232                 case BCM590XX_REG_MSR:
 233                         reg = BCM590XX_MSRPMCTRL1;
 234                         break;
 235                 case BCM590XX_REG_SDSR1:
 236                         reg = BCM590XX_SDSR1PMCTRL1;
 237                         break;
 238                 case BCM590XX_REG_SDSR2:
 239                         reg = BCM590XX_SDSR2PMCTRL1;
 240                         break;
 241                 case BCM590XX_REG_VSR:
 242                         reg = BCM590XX_VSRPMCTRL1;
 243                         break;
 244                 case BCM590XX_REG_VBUS:
 245                         reg = BCM590XX_OTG_CTRL;
 246                         break;
 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 static int bcm590xx_probe(struct platform_device *pdev)
 280 {
 281         struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
 282         struct bcm590xx_reg *pmu;
 283         struct regulator_config config = { };
 284         struct bcm590xx_info *info;
 285         struct regulator_dev *rdev;
 286         int i;
 287
 288         pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
 289         if (!pmu)
 290                 return -ENOMEM;
 291
 292         pmu->mfd = bcm590xx;
 293
 294         platform_set_drvdata(pdev, pmu);
 295
 296         pmu->desc = devm_kcalloc(&pdev->dev,
 297                                  BCM590XX_NUM_REGS,
 298                                  sizeof(struct regulator_desc),
 299                                  GFP_KERNEL);
 300         if (!pmu->desc)
 301                 return -ENOMEM;
 302
 303         info = bcm590xx_regs;
 304
 305         for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
 306                 /* Register the regulators */
 307                 pmu->desc[i].name = info->name;
 308                 pmu->desc[i].of_match = of_match_ptr(info->name);
 309                 pmu->desc[i].regulators_node = of_match_ptr("regulators");
 310                 pmu->desc[i].supply_name = info->vin_name;
 311                 pmu->desc[i].id = i;
 312                 pmu->desc[i].volt_table = info->volt_table;
 313                 pmu->desc[i].n_voltages = info->n_voltages;
 314                 pmu->desc[i].linear_ranges = info->linear_ranges;
 315                 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
 316
 317                 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
 318                         pmu->desc[i].ops = &bcm590xx_ops_ldo;
 319                         pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
 320                 } else if (BCM590XX_REG_IS_VBUS(i))
 321                         pmu->desc[i].ops = &bcm590xx_ops_vbus;
 322                 else {
 323                         pmu->desc[i].ops = &bcm590xx_ops_dcdc;
 324                         pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
 325                 }
 326
 327                 if (BCM590XX_REG_IS_VBUS(i))
 328                         pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
 329                 else {
 330                         pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
 331                         pmu->desc[i].enable_is_inverted = true;
 332                         pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
 333                 }
 334                 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
 335                 pmu->desc[i].type = REGULATOR_VOLTAGE;
 336                 pmu->desc[i].owner = THIS_MODULE;
 337
 338                 config.dev = bcm590xx->dev;
 339                 config.driver_data = pmu;
 340                 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
 341                         config.regmap = bcm590xx->regmap_sec;
 342                 else
 343                         config.regmap = bcm590xx->regmap_pri;
 344
 345                 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
 346                                                &config);
 347                 if (IS_ERR(rdev)) {
 348                         dev_err(bcm590xx->dev,
 349                                 "failed to register %s regulator\n",
 350                                 pdev->name);
 351                         return PTR_ERR(rdev);
 352                 }
 353         }
 354
 355         return 0;
 356 }
 357
 358 static struct platform_driver bcm590xx_regulator_driver = {
 359         .driver = {
 360                 .name = "bcm590xx-vregs",
 361         },
 362         .probe = bcm590xx_probe,
 363 };
 364 module_platform_driver(bcm590xx_regulator_driver);
 365
 366 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 367 MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 368 MODULE_LICENSE("GPL v2");
 369 MODULE_ALIAS("platform:bcm590xx-vregs");