linux/drivers/regulator/bcm590xx-regulator.c
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   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 */
 103static 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 */
 109static const unsigned int ldo_c_table[] = {
 110        3100000, 1800000, 2500000, 2700000, 2800000,
 111        2900000, 3000000, 3300000,
 112};
 113
 114static const unsigned int ldo_vbus[] = {
 115        5000000,
 116};
 117
 118/* DCDC group CSR: supported voltages in microvolts */
 119static 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 */
 126static 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 */
 134static 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
 140struct 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
 164static 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
 194struct bcm590xx_reg {
 195        struct regulator_desc *desc;
 196        struct bcm590xx *mfd;
 197};
 198
 199static 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
 209static 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
 249static 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
 259static 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
 269static 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
 275static 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
 354static struct platform_driver bcm590xx_regulator_driver = {
 355        .driver = {
 356                .name = "bcm590xx-vregs",
 357        },
 358        .probe = bcm590xx_probe,
 359};
 360module_platform_driver(bcm590xx_regulator_driver);
 361
 362MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
 363MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
 364MODULE_LICENSE("GPL v2");
 365MODULE_ALIAS("platform:bcm590xx-vregs");
 366