drivers/regulator/bcm590xx-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Broadcom BCM590xx regulator driver
   4  *
   5  * Copyright 2014 Linaro Limited
   6  * Author: Matt Porter <mporter@linaro.org>
   7  */
   8
   9 #include <linux/err.h>
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/mfd/bcm590xx.h>
  13 #include <linux/module.h>
  14 #include <linux/of.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/machine.h>
  18 #include <linux/regulator/of_regulator.h>
  19 #include <linux/slab.h>
  20
  21 /* I2C slave 0 registers */
  22 #define BCM590XX_RFLDOPMCTRL1   0x60
  23 #define BCM590XX_IOSR1PMCTRL1   0x7a
  24 #define BCM590XX_IOSR2PMCTRL1   0x7c
  25 #define BCM590XX_CSRPMCTRL1     0x7e
  26 #define BCM590XX_SDSR1PMCTRL1   0x82
  27 #define BCM590XX_SDSR2PMCTRL1   0x86
  28 #define BCM590XX_MSRPMCTRL1     0x8a
  29 #define BCM590XX_VSRPMCTRL1     0x8e
  30 #define BCM590XX_RFLDOCTRL      0x96
  31 #define BCM590XX_CSRVOUT1       0xc0
  32
  33 /* I2C slave 1 registers */
  34 #define BCM590XX_GPLDO5PMCTRL1  0x16
  35 #define BCM590XX_GPLDO6PMCTRL1  0x18
  36 #define BCM590XX_GPLDO1CTRL     0x1a
  37 #define BCM590XX_GPLDO2CTRL     0x1b
  38 #define BCM590XX_GPLDO3CTRL     0x1c
  39 #define BCM590XX_GPLDO4CTRL     0x1d
  40 #define BCM590XX_GPLDO5CTRL     0x1e
  41 #define BCM590XX_GPLDO6CTRL     0x1f
  42 #define BCM590XX_OTG_CTRL       0x40
  43 #define BCM590XX_GPLDO1PMCTRL1  0x57
  44 #define BCM590XX_GPLDO2PMCTRL1  0x59
  45 #define BCM590XX_GPLDO3PMCTRL1  0x5b
  46 #define BCM590XX_GPLDO4PMCTRL1  0x5d
  47
  48 #define BCM590XX_REG_ENABLE     BIT(7)
  49 #define BCM590XX_VBUS_ENABLE    BIT(2)
  50 #define BCM590XX_LDO_VSEL_MASK  GENMASK(5, 3)
  51 #define BCM590XX_SR_VSEL_MASK   GENMASK(5, 0)
  52
  53 /*
  54  * RFLDO to VSR regulators are
  55  * accessed via I2C slave 0
  56  */
  57
  58 /* LDO regulator IDs */
  59 #define BCM590XX_REG_RFLDO      0
  60 #define BCM590XX_REG_CAMLDO1    1
  61 #define BCM590XX_REG_CAMLDO2    2
  62 #define BCM590XX_REG_SIMLDO1    3
  63 #define BCM590XX_REG_SIMLDO2    4
  64 #define BCM590XX_REG_SDLDO      5
  65 #define BCM590XX_REG_SDXLDO     6
  66 #define BCM590XX_REG_MMCLDO1    7
  67 #define BCM590XX_REG_MMCLDO2    8
  68 #define BCM590XX_REG_AUDLDO     9
  69 #define BCM590XX_REG_MICLDO     10
  70 #define BCM590XX_REG_USBLDO     11
  71 #define BCM590XX_REG_VIBLDO     12
  72
  73 /* DCDC regulator IDs */
  74 #define BCM590XX_REG_CSR        13
  75 #define BCM590XX_REG_IOSR1      14
  76 #define BCM590XX_REG_IOSR2      15
  77 #define BCM590XX_REG_MSR        16
  78 #define BCM590XX_REG_SDSR1      17
  79 #define BCM590XX_REG_SDSR2      18
  80 #define BCM590XX_REG_VSR        19
  81
  82 /*
  83  * GPLDO1 to VBUS regulators are
  84  * accessed via I2C slave 1
  85  */
  86
  87 #define BCM590XX_REG_GPLDO1     20
  88 #define BCM590XX_REG_GPLDO2     21
  89 #define BCM590XX_REG_GPLDO3     22
  90 #define BCM590XX_REG_GPLDO4     23
  91 #define BCM590XX_REG_GPLDO5     24
  92 #define BCM590XX_REG_GPLDO6     25
  93 #define BCM590XX_REG_VBUS       26
  94
  95 #define BCM590XX_NUM_REGS       27
  96
  97 #define BCM590XX_REG_IS_LDO(n)  (n < BCM590XX_REG_CSR)
  98 #define BCM590XX_REG_IS_GPLDO(n) \
  99         ((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))
 100 #define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS)
 101
 102 /* LDO group A: supported voltages in microvolts */
 103 static const unsigned int ldo_a_table[] = {
 104         1200000, 1800000, 2500000, 2700000, 2800000,
 105         2900000, 3000000, 3300000,
 106 };
 107
 108 /* LDO group C: supported voltages in microvolts */
 109 static const unsigned int ldo_c_table[] = {
 110         3100000, 1800000, 2500000, 2700000, 2800000,
 111         2900000, 3000000, 3300000,
 112 };
 113
 114 static const unsigned int ldo_vbus[] = {
 115         5000000,
 116 };
 117
 118 /* DCDC group CSR: supported voltages in microvolts */
 119 static const struct linear_range dcdc_csr_ranges[] = {
 120         REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 121         REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
 122         REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
 123 };
 124
 125 /* DCDC group IOSR1: supported voltages in microvolts */
 126 static const struct linear_range dcdc_iosr1_ranges[] = {
 127         REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
 128         REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
 129         REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
 130         REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
 131 };
 132
 133 /* DCDC group SDSR1: supported voltages in microvolts */
 134 static const struct linear_range dcdc_sdsr1_ranges[] = {
 135         REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
 136         REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
 137         REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
 138 };
 139
 140 struct bcm590xx_info {
 141         const char *name;
 142         const char *vin_name;
 143         u8 n_voltages;
 144         const unsigned int *volt_table;
 145         u8 n_linear_ranges;
 146         const struct linear_range *linear_ranges;
 147 };
 148
 149 #define BCM590XX_REG_TABLE(_name, _table) \
 150         { \
 151                 .name = #_name, \
 152                 .n_voltages = ARRAY_SIZE(_table), \
 153                 .volt_table = _table, \
 154         }
 155
 156 #define BCM590XX_REG_RANGES(_name, _ranges) \
 157         { \
 158                 .name = #_name, \
 159                 .n_voltages = 64, \
 160                 .n_linear_ranges = ARRAY_SIZE(_ranges), \
 161                 .linear_ranges = _ranges, \
 162         }
 163
 164 static struct bcm590xx_info bcm590xx_regs[] = {
 165         BCM590XX_REG_TABLE(rfldo, ldo_a_table),
 166         BCM590XX_REG_TABLE(camldo1, ldo_c_table),
 167         BCM590XX_REG_TABLE(camldo2, ldo_c_table),
 168         BCM590XX_REG_TABLE(simldo1, ldo_a_table),
 169         BCM590XX_REG_TABLE(simldo2, ldo_a_table),
 170         BCM590XX_REG_TABLE(sdldo, ldo_c_table),
 171         BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
 172         BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
 173         BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
 174         BCM590XX_REG_TABLE(audldo, ldo_a_table),
 175         BCM590XX_REG_TABLE(micldo, ldo_a_table),
 176         BCM590XX_REG_TABLE(usbldo, ldo_a_table),
 177         BCM590XX_REG_TABLE(vibldo, ldo_c_table),
 178         BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
 179         BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
 180         BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
 181         BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
 182         BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
 183         BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
 184         BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
 185         BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
 186         BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
 187         BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
 188         BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
 189         BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
 190         BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
 191         BCM590XX_REG_TABLE(vbus, ldo_vbus),
 192 };
 193
 194 struct bcm590xx_reg {
 195         struct regulator_desc *desc;
 196         struct bcm590xx *mfd;
 197 };
 198
 199 static int bcm590xx_get_vsel_register(int id)
 200 {
 201         if (BCM590XX_REG_IS_LDO(id))
 202                 return BCM590XX_RFLDOCTRL + id;
 203         else if (BCM590XX_REG_IS_GPLDO(id))
 204                 return BCM590XX_GPLDO1CTRL + id;
 205         else
 206                 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
 207 }
 208
 209 static int bcm590xx_get_enable_register(int id)
 210 {
 211         int reg = 0;
 212
 213         if (BCM590XX_REG_IS_LDO(id))
 214                 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
 215         else if (BCM590XX_REG_IS_GPLDO(id))
 216                 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
 217         else
 218                 switch (id) {
 219                 case BCM590XX_REG_CSR:
 220                         reg = BCM590XX_CSRPMCTRL1;
 221                         break;
 222                 case BCM590XX_REG_IOSR1:
 223                         reg = BCM590XX_IOSR1PMCTRL1;
 224                         break;
 225                 case BCM590XX_REG_IOSR2:
 226                         reg = BCM590XX_IOSR2PMCTRL1;
 227                         break;
 228                 case BCM590XX_REG_MSR:
 229                         reg = BCM590XX_MSRPMCTRL1;
 230                         break;
 231                 case BCM590XX_REG_SDSR1:
 232                         reg = BCM590XX_SDSR1PMCTRL1;
 233                         break;
 234                 case BCM590XX_REG_SDSR2:
 235                         reg = BCM590XX_SDSR2PMCTRL1;
 236                         break;
 237                 case BCM590XX_REG_VSR:
 238                         reg = BCM590XX_VSRPMCTRL1;
 239                         break;
 240                 case BCM590XX_REG_VBUS:
 241                         reg = BCM590XX_OTG_CTRL;
 242                         break;
 243                 }
 244
 245
 246         return reg;
 247 }
 248
 249 static const struct regulator_ops bcm590xx_ops_ldo = {
 250         .is_enabled             = regulator_is_enabled_regmap,
 251         .enable                 = regulator_enable_regmap,
 252         .disable                = regulator_disable_regmap,
 253         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 254         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 255         .list_voltage           = regulator_list_voltage_table,
 256         .map_voltage            = regulator_map_voltage_iterate,
 257 };
 258
 259 static const struct regulator_ops bcm590xx_ops_dcdc = {
 260         .is_enabled             = regulator_is_enabled_regmap,
 261         .enable                 = regulator_enable_regmap,
 262         .disable                = regulator_disable_regmap,
 263         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 264         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 265         .list_voltage           = regulator_list_voltage_linear_range,
 266         .map_voltage            = regulator_map_voltage_linear_range,
 267 };
 268
 269 static const struct regulator_ops bcm590xx_ops_vbus = {
 270         .is_enabled             = regulator_is_enabled_regmap,
 271         .enable                 = regulator_enable_regmap,
 272         .disable                = regulator_disable_regmap,
 273 };
 274
 275 static int bcm590xx_probe(struct platform_device *pdev)
 276 {
 277         struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
 278         struct bcm590xx_reg *pmu;
 279         struct regulator_config config = { };
 280         struct bcm590xx_info *info;
 281         struct regulator_dev *rdev;
 282         int i;
 283
 284         pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
 285         if (!pmu)
 286                 return -ENOMEM;
 287
 288         pmu->mfd = bcm590xx;
 289
 290         platform_set_drvdata(pdev, pmu);
 291
 292         pmu->desc = devm_kcalloc(&pdev->dev,
 293                                  BCM590XX_NUM_REGS,
 294                                  sizeof(struct regulator_desc),
 295                                  GFP_KERNEL);
 296         if (!pmu->desc)
 297                 return -ENOMEM;
 298
 299         info = bcm590xx_regs;
 300
 301         for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
 302                 /* Register the regulators */
 303                 pmu->desc[i].name = info->name;
 304                 pmu->desc[i].of_match = of_match_ptr(info->name);
 305                 pmu->desc[i].regulators_node = of_match_ptr("regulators");
 306                 pmu->desc[i].supply_name = info->vin_name;
 307                 pmu->desc[i].id = i;
 308                 pmu->desc[i].volt_table = info->volt_table;
 309                 pmu->desc[i].n_voltages = info->n_voltages;
 310                 pmu->desc[i].linear_ranges = info->linear_ranges;
 311                 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
 312
 313                 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
 314                         pmu->desc[i].ops = &bcm590xx_ops_ldo;
 315                         pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
 316                 } else if (BCM590XX_REG_IS_VBUS(i))
 317                         pmu->desc[i].ops = &bcm590xx_ops_vbus;
 318                 else {
 319                         pmu->desc[i].ops = &bcm590xx_ops_dcdc;
 320                         pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
 321                 }
 322
 323                 if (BCM590XX_REG_IS_VBUS(i))
 324                         pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
 325                 else {
 326                         pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
 327                         pmu->desc[i].enable_is_inverted = true;
 328                         pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
 329                 }
 330                 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
 331                 pmu->desc[i].type = REGULATOR_VOLTAGE;
 332                 pmu->desc[i].owner = THIS_MODULE;
 333
 334                 config.dev = bcm590xx->dev;
 335                 config.driver_data = pmu;
 336                 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
 337                         config.regmap = bcm590xx->regmap_sec;
 338                 else
 339                         config.regmap = bcm590xx->regmap_pri;
 340
 341                 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
 342                                                &config);
 343                 if (IS_ERR(rdev)) {
 344                         dev_err(bcm590xx->dev,
 345                                 "failed to register %s regulator\n",
 346                                 pdev->name);
 347                         return PTR_ERR(rdev);
 348                 }
 349         }
 350
 351         return 0;
 352 }
 353
 354 static struct platform_driver bcm590xx_regulator_driver = {
 355         .driver = {
 356                 .name = "bcm590xx-vregs",
 357         },
 358         .probe = bcm590xx_probe,
 359 };
 360 module_platform_driver(bcm590xx_regulator_driver);
 361
 362 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 363 MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 364 MODULE_LICENSE("GPL v2");
 365 MODULE_ALIAS("platform:bcm590xx-vregs");