drivers/regulator/act8865-regulator.c

   1 /*
   2  * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
   3  *
   4  * http://www.active-semi.com/products/power-management-units/act88xx/
   5  *
   6  * Copyright (C) 2013 Atmel Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/i2c.h>
  22 #include <linux/err.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/regulator/driver.h>
  25 #include <linux/regulator/act8865.h>
  26 #include <linux/of.h>
  27 #include <linux/of_device.h>
  28 #include <linux/regulator/of_regulator.h>
  29 #include <linux/regmap.h>
  30
  31 /*
  32  * ACT8600 Global Register Map.
  33  */
  34 #define ACT8600_SYS_MODE        0x00
  35 #define ACT8600_SYS_CTRL        0x01
  36 #define ACT8600_DCDC1_VSET      0x10
  37 #define ACT8600_DCDC1_CTRL      0x12
  38 #define ACT8600_DCDC2_VSET      0x20
  39 #define ACT8600_DCDC2_CTRL      0x22
  40 #define ACT8600_DCDC3_VSET      0x30
  41 #define ACT8600_DCDC3_CTRL      0x32
  42 #define ACT8600_SUDCDC4_VSET    0x40
  43 #define ACT8600_SUDCDC4_CTRL    0x41
  44 #define ACT8600_LDO5_VSET       0x50
  45 #define ACT8600_LDO5_CTRL       0x51
  46 #define ACT8600_LDO6_VSET       0x60
  47 #define ACT8600_LDO6_CTRL       0x61
  48 #define ACT8600_LDO7_VSET       0x70
  49 #define ACT8600_LDO7_CTRL       0x71
  50 #define ACT8600_LDO8_VSET       0x80
  51 #define ACT8600_LDO8_CTRL       0x81
  52 #define ACT8600_LDO910_CTRL     0x91
  53 #define ACT8600_APCH0           0xA1
  54 #define ACT8600_APCH1           0xA8
  55 #define ACT8600_APCH2           0xA9
  56 #define ACT8600_APCH_STAT       0xAA
  57 #define ACT8600_OTG0            0xB0
  58 #define ACT8600_OTG1            0xB2
  59
  60 /*
  61  * ACT8846 Global Register Map.
  62  */
  63 #define ACT8846_SYS0            0x00
  64 #define ACT8846_SYS1            0x01
  65 #define ACT8846_REG1_VSET       0x10
  66 #define ACT8846_REG1_CTRL       0x12
  67 #define ACT8846_REG2_VSET0      0x20
  68 #define ACT8846_REG2_VSET1      0x21
  69 #define ACT8846_REG2_CTRL       0x22
  70 #define ACT8846_REG3_VSET0      0x30
  71 #define ACT8846_REG3_VSET1      0x31
  72 #define ACT8846_REG3_CTRL       0x32
  73 #define ACT8846_REG4_VSET0      0x40
  74 #define ACT8846_REG4_VSET1      0x41
  75 #define ACT8846_REG4_CTRL       0x42
  76 #define ACT8846_REG5_VSET       0x50
  77 #define ACT8846_REG5_CTRL       0x51
  78 #define ACT8846_REG6_VSET       0x58
  79 #define ACT8846_REG6_CTRL       0x59
  80 #define ACT8846_REG7_VSET       0x60
  81 #define ACT8846_REG7_CTRL       0x61
  82 #define ACT8846_REG8_VSET       0x68
  83 #define ACT8846_REG8_CTRL       0x69
  84 #define ACT8846_REG9_VSET       0x70
  85 #define ACT8846_REG9_CTRL       0x71
  86 #define ACT8846_REG10_VSET      0x80
  87 #define ACT8846_REG10_CTRL      0x81
  88 #define ACT8846_REG11_VSET      0x90
  89 #define ACT8846_REG11_CTRL      0x91
  90 #define ACT8846_REG12_VSET      0xa0
  91 #define ACT8846_REG12_CTRL      0xa1
  92 #define ACT8846_REG13_CTRL      0xb1
  93 #define ACT8846_GLB_OFF_CTRL    0xc3
  94 #define ACT8846_OFF_SYSMASK     0x18
  95
  96 /*
  97  * ACT8865 Global Register Map.
  98  */
  99 #define ACT8865_SYS_MODE        0x00
 100 #define ACT8865_SYS_CTRL        0x01
 101 #define ACT8865_DCDC1_VSET1     0x20
 102 #define ACT8865_DCDC1_VSET2     0x21
 103 #define ACT8865_DCDC1_CTRL      0x22
 104 #define ACT8865_DCDC2_VSET1     0x30
 105 #define ACT8865_DCDC2_VSET2     0x31
 106 #define ACT8865_DCDC2_CTRL      0x32
 107 #define ACT8865_DCDC3_VSET1     0x40
 108 #define ACT8865_DCDC3_VSET2     0x41
 109 #define ACT8865_DCDC3_CTRL      0x42
 110 #define ACT8865_LDO1_VSET       0x50
 111 #define ACT8865_LDO1_CTRL       0x51
 112 #define ACT8865_LDO2_VSET       0x54
 113 #define ACT8865_LDO2_CTRL       0x55
 114 #define ACT8865_LDO3_VSET       0x60
 115 #define ACT8865_LDO3_CTRL       0x61
 116 #define ACT8865_LDO4_VSET       0x64
 117 #define ACT8865_LDO4_CTRL       0x65
 118 #define ACT8865_MSTROFF         0x20
 119
 120 /*
 121  * Field Definitions.
 122  */
 123 #define ACT8865_ENA             0x80    /* ON - [7] */
 124 #define ACT8865_VSEL_MASK       0x3F    /* VSET - [5:0] */
 125
 126
 127 #define ACT8600_LDO10_ENA               0x40    /* ON - [6] */
 128 #define ACT8600_SUDCDC_VSEL_MASK        0xFF    /* SUDCDC VSET - [7:0] */
 129
 130 /*
 131  * ACT8865 voltage number
 132  */
 133 #define ACT8865_VOLTAGE_NUM     64
 134 #define ACT8600_SUDCDC_VOLTAGE_NUM      256
 135
 136 struct act8865 {
 137         struct regmap *regmap;
 138         int off_reg;
 139         int off_mask;
 140 };
 141
 142 static const struct regmap_range act8600_reg_ranges[] = {
 143         regmap_reg_range(0x00, 0x01),
 144         regmap_reg_range(0x10, 0x10),
 145         regmap_reg_range(0x12, 0x12),
 146         regmap_reg_range(0x20, 0x20),
 147         regmap_reg_range(0x22, 0x22),
 148         regmap_reg_range(0x30, 0x30),
 149         regmap_reg_range(0x32, 0x32),
 150         regmap_reg_range(0x40, 0x41),
 151         regmap_reg_range(0x50, 0x51),
 152         regmap_reg_range(0x60, 0x61),
 153         regmap_reg_range(0x70, 0x71),
 154         regmap_reg_range(0x80, 0x81),
 155         regmap_reg_range(0x91, 0x91),
 156         regmap_reg_range(0xA1, 0xA1),
 157         regmap_reg_range(0xA8, 0xAA),
 158         regmap_reg_range(0xB0, 0xB0),
 159         regmap_reg_range(0xB2, 0xB2),
 160         regmap_reg_range(0xC1, 0xC1),
 161 };
 162
 163 static const struct regmap_range act8600_reg_ro_ranges[] = {
 164         regmap_reg_range(0xAA, 0xAA),
 165         regmap_reg_range(0xC1, 0xC1),
 166 };
 167
 168 static const struct regmap_range act8600_reg_volatile_ranges[] = {
 169         regmap_reg_range(0x00, 0x01),
 170         regmap_reg_range(0x12, 0x12),
 171         regmap_reg_range(0x22, 0x22),
 172         regmap_reg_range(0x32, 0x32),
 173         regmap_reg_range(0x41, 0x41),
 174         regmap_reg_range(0x51, 0x51),
 175         regmap_reg_range(0x61, 0x61),
 176         regmap_reg_range(0x71, 0x71),
 177         regmap_reg_range(0x81, 0x81),
 178         regmap_reg_range(0xA8, 0xA8),
 179         regmap_reg_range(0xAA, 0xAA),
 180         regmap_reg_range(0xB0, 0xB0),
 181         regmap_reg_range(0xC1, 0xC1),
 182 };
 183
 184 static const struct regmap_access_table act8600_write_ranges_table = {
 185         .yes_ranges     = act8600_reg_ranges,
 186         .n_yes_ranges   = ARRAY_SIZE(act8600_reg_ranges),
 187         .no_ranges      = act8600_reg_ro_ranges,
 188         .n_no_ranges    = ARRAY_SIZE(act8600_reg_ro_ranges),
 189 };
 190
 191 static const struct regmap_access_table act8600_read_ranges_table = {
 192         .yes_ranges     = act8600_reg_ranges,
 193         .n_yes_ranges   = ARRAY_SIZE(act8600_reg_ranges),
 194 };
 195
 196 static const struct regmap_access_table act8600_volatile_ranges_table = {
 197         .yes_ranges     = act8600_reg_volatile_ranges,
 198         .n_yes_ranges   = ARRAY_SIZE(act8600_reg_volatile_ranges),
 199 };
 200
 201 static const struct regmap_config act8600_regmap_config = {
 202         .reg_bits = 8,
 203         .val_bits = 8,
 204         .max_register = 0xFF,
 205         .wr_table = &act8600_write_ranges_table,
 206         .rd_table = &act8600_read_ranges_table,
 207         .volatile_table = &act8600_volatile_ranges_table,
 208 };
 209
 210 static const struct regmap_config act8865_regmap_config = {
 211         .reg_bits = 8,
 212         .val_bits = 8,
 213 };
 214
 215 static const struct regulator_linear_range act8865_voltage_ranges[] = {
 216         REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
 217         REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
 218         REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
 219 };
 220
 221 static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
 222         REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
 223         REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
 224         REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
 225         REGULATOR_LINEAR_RANGE(19000000, 192, 247, 400000),
 226         REGULATOR_LINEAR_RANGE(41400000, 248, 255, 0),
 227 };
 228
 229 static struct regulator_ops act8865_ops = {
 230         .list_voltage           = regulator_list_voltage_linear_range,
 231         .map_voltage            = regulator_map_voltage_linear_range,
 232         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 233         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 234         .enable                 = regulator_enable_regmap,
 235         .disable                = regulator_disable_regmap,
 236         .is_enabled             = regulator_is_enabled_regmap,
 237 };
 238
 239 static struct regulator_ops act8865_ldo_ops = {
 240         .enable                 = regulator_enable_regmap,
 241         .disable                = regulator_disable_regmap,
 242         .is_enabled             = regulator_is_enabled_regmap,
 243 };
 244
 245 #define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply)            \
 246         [_family##_ID_##_id] = {                                        \
 247                 .name                   = _name,                        \
 248                 .supply_name            = _supply,                      \
 249                 .id                     = _family##_ID_##_id,           \
 250                 .type                   = REGULATOR_VOLTAGE,            \
 251                 .ops                    = &act8865_ops,                 \
 252                 .n_voltages             = ACT8865_VOLTAGE_NUM,          \
 253                 .linear_ranges          = act8865_voltage_ranges,       \
 254                 .n_linear_ranges        = ARRAY_SIZE(act8865_voltage_ranges), \
 255                 .vsel_reg               = _family##_##_id##_##_vsel_reg, \
 256                 .vsel_mask              = ACT8865_VSEL_MASK,            \
 257                 .enable_reg             = _family##_##_id##_CTRL,       \
 258                 .enable_mask            = ACT8865_ENA,                  \
 259                 .owner                  = THIS_MODULE,                  \
 260         }
 261
 262 static const struct regulator_desc act8600_regulators[] = {
 263         ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
 264         ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
 265         ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
 266         {
 267                 .name = "SUDCDC_REG4",
 268                 .id = ACT8600_ID_SUDCDC4,
 269                 .ops = &act8865_ops,
 270                 .type = REGULATOR_VOLTAGE,
 271                 .n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
 272                 .linear_ranges = act8600_sudcdc_voltage_ranges,
 273                 .n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
 274                 .vsel_reg = ACT8600_SUDCDC4_VSET,
 275                 .vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
 276                 .enable_reg = ACT8600_SUDCDC4_CTRL,
 277                 .enable_mask = ACT8865_ENA,
 278                 .owner = THIS_MODULE,
 279         },
 280         ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
 281         ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
 282         ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
 283         ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
 284         {
 285                 .name = "LDO_REG9",
 286                 .id = ACT8600_ID_LDO9,
 287                 .ops = &act8865_ldo_ops,
 288                 .type = REGULATOR_VOLTAGE,
 289                 .n_voltages = 1,
 290                 .fixed_uV = 3300000,
 291                 .enable_reg = ACT8600_LDO910_CTRL,
 292                 .enable_mask = ACT8865_ENA,
 293                 .owner = THIS_MODULE,
 294         },
 295         {
 296                 .name = "LDO_REG10",
 297                 .id = ACT8600_ID_LDO10,
 298                 .ops = &act8865_ldo_ops,
 299                 .type = REGULATOR_VOLTAGE,
 300                 .n_voltages = 1,
 301                 .fixed_uV = 1200000,
 302                 .enable_reg = ACT8600_LDO910_CTRL,
 303                 .enable_mask = ACT8600_LDO10_ENA,
 304                 .owner = THIS_MODULE,
 305         },
 306 };
 307
 308 static const struct regulator_desc act8846_regulators[] = {
 309         ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
 310         ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
 311         ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
 312         ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
 313         ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
 314         ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
 315         ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
 316         ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
 317         ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
 318         ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
 319         ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
 320         ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
 321 };
 322
 323 static const struct regulator_desc act8865_regulators[] = {
 324         ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
 325         ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
 326         ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
 327         ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
 328         ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
 329         ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
 330         ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
 331 };
 332
 333 static const struct regulator_desc act8865_alt_regulators[] = {
 334         ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"),
 335         ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"),
 336         ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"),
 337         ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
 338         ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
 339         ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
 340         ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
 341 };
 342
 343 #ifdef CONFIG_OF
 344 static const struct of_device_id act8865_dt_ids[] = {
 345         { .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
 346         { .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
 347         { .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
 348         { }
 349 };
 350 MODULE_DEVICE_TABLE(of, act8865_dt_ids);
 351
 352 static struct of_regulator_match act8846_matches[] = {
 353         [ACT8846_ID_REG1]       = { .name = "REG1" },
 354         [ACT8846_ID_REG2]       = { .name = "REG2" },
 355         [ACT8846_ID_REG3]       = { .name = "REG3" },
 356         [ACT8846_ID_REG4]       = { .name = "REG4" },
 357         [ACT8846_ID_REG5]       = { .name = "REG5" },
 358         [ACT8846_ID_REG6]       = { .name = "REG6" },
 359         [ACT8846_ID_REG7]       = { .name = "REG7" },
 360         [ACT8846_ID_REG8]       = { .name = "REG8" },
 361         [ACT8846_ID_REG9]       = { .name = "REG9" },
 362         [ACT8846_ID_REG10]      = { .name = "REG10" },
 363         [ACT8846_ID_REG11]      = { .name = "REG11" },
 364         [ACT8846_ID_REG12]      = { .name = "REG12" },
 365 };
 366
 367 static struct of_regulator_match act8865_matches[] = {
 368         [ACT8865_ID_DCDC1]      = { .name = "DCDC_REG1"},
 369         [ACT8865_ID_DCDC2]      = { .name = "DCDC_REG2"},
 370         [ACT8865_ID_DCDC3]      = { .name = "DCDC_REG3"},
 371         [ACT8865_ID_LDO1]       = { .name = "LDO_REG1"},
 372         [ACT8865_ID_LDO2]       = { .name = "LDO_REG2"},
 373         [ACT8865_ID_LDO3]       = { .name = "LDO_REG3"},
 374         [ACT8865_ID_LDO4]       = { .name = "LDO_REG4"},
 375 };
 376
 377 static struct of_regulator_match act8600_matches[] = {
 378         [ACT8600_ID_DCDC1]      = { .name = "DCDC_REG1"},
 379         [ACT8600_ID_DCDC2]      = { .name = "DCDC_REG2"},
 380         [ACT8600_ID_DCDC3]      = { .name = "DCDC_REG3"},
 381         [ACT8600_ID_SUDCDC4]    = { .name = "SUDCDC_REG4"},
 382         [ACT8600_ID_LDO5]       = { .name = "LDO_REG5"},
 383         [ACT8600_ID_LDO6]       = { .name = "LDO_REG6"},
 384         [ACT8600_ID_LDO7]       = { .name = "LDO_REG7"},
 385         [ACT8600_ID_LDO8]       = { .name = "LDO_REG8"},
 386         [ACT8600_ID_LDO9]       = { .name = "LDO_REG9"},
 387         [ACT8600_ID_LDO10]      = { .name = "LDO_REG10"},
 388 };
 389
 390 static int act8865_pdata_from_dt(struct device *dev,
 391                                  struct act8865_platform_data *pdata,
 392                                  unsigned long type)
 393 {
 394         int matched, i, num_matches;
 395         struct device_node *np;
 396         struct act8865_regulator_data *regulator;
 397         struct of_regulator_match *matches;
 398
 399         switch (type) {
 400         case ACT8600:
 401                 matches = act8600_matches;
 402                 num_matches = ARRAY_SIZE(act8600_matches);
 403                 break;
 404         case ACT8846:
 405                 matches = act8846_matches;
 406                 num_matches = ARRAY_SIZE(act8846_matches);
 407                 break;
 408         case ACT8865:
 409                 matches = act8865_matches;
 410                 num_matches = ARRAY_SIZE(act8865_matches);
 411                 break;
 412         default:
 413                 dev_err(dev, "invalid device id %lu\n", type);
 414                 return -EINVAL;
 415         }
 416
 417         np = of_get_child_by_name(dev->of_node, "regulators");
 418         if (!np) {
 419                 dev_err(dev, "missing 'regulators' subnode in DT\n");
 420                 return -EINVAL;
 421         }
 422
 423         matched = of_regulator_match(dev, np, matches, num_matches);
 424         of_node_put(np);
 425         if (matched <= 0)
 426                 return matched;
 427
 428         pdata->regulators = devm_kcalloc(dev,
 429                                          num_matches,
 430                                          sizeof(struct act8865_regulator_data),
 431                                          GFP_KERNEL);
 432         if (!pdata->regulators)
 433                 return -ENOMEM;
 434
 435         pdata->num_regulators = num_matches;
 436         regulator = pdata->regulators;
 437
 438         for (i = 0; i < num_matches; i++) {
 439                 regulator->id = i;
 440                 regulator->name = matches[i].name;
 441                 regulator->init_data = matches[i].init_data;
 442                 regulator->of_node = matches[i].of_node;
 443                 regulator++;
 444         }
 445
 446         return 0;
 447 }
 448 #else
 449 static inline int act8865_pdata_from_dt(struct device *dev,
 450                                         struct act8865_platform_data *pdata,
 451                                         unsigned long type)
 452 {
 453         return 0;
 454 }
 455 #endif
 456
 457 static struct act8865_regulator_data *act8865_get_regulator_data(
 458                 int id, struct act8865_platform_data *pdata)
 459 {
 460         int i;
 461
 462         if (!pdata)
 463                 return NULL;
 464
 465         for (i = 0; i < pdata->num_regulators; i++) {
 466                 if (pdata->regulators[i].id == id)
 467                         return &pdata->regulators[i];
 468         }
 469
 470         return NULL;
 471 }
 472
 473 static struct i2c_client *act8865_i2c_client;
 474 static void act8865_power_off(void)
 475 {
 476         struct act8865 *act8865;
 477
 478         act8865 = i2c_get_clientdata(act8865_i2c_client);
 479         regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
 480         while (1);
 481 }
 482
 483 static int act8865_pmic_probe(struct i2c_client *client,
 484                               const struct i2c_device_id *i2c_id)
 485 {
 486         const struct regulator_desc *regulators;
 487         struct act8865_platform_data pdata_of, *pdata;
 488         struct device *dev = &client->dev;
 489         int i, ret, num_regulators;
 490         struct act8865 *act8865;
 491         const struct regmap_config *regmap_config;
 492         unsigned long type;
 493         int off_reg, off_mask;
 494         int voltage_select = 0;
 495
 496         pdata = dev_get_platdata(dev);
 497
 498         if (dev->of_node && !pdata) {
 499                 const struct of_device_id *id;
 500
 501                 id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
 502                 if (!id)
 503                         return -ENODEV;
 504
 505                 type = (unsigned long) id->data;
 506
 507                 voltage_select = !!of_get_property(dev->of_node,
 508                                                    "active-semi,vsel-high",
 509                                                    NULL);
 510         } else {
 511                 type = i2c_id->driver_data;
 512         }
 513
 514         switch (type) {
 515         case ACT8600:
 516                 regulators = act8600_regulators;
 517                 num_regulators = ARRAY_SIZE(act8600_regulators);
 518                 regmap_config = &act8600_regmap_config;
 519                 off_reg = -1;
 520                 off_mask = -1;
 521                 break;
 522         case ACT8846:
 523                 regulators = act8846_regulators;
 524                 num_regulators = ARRAY_SIZE(act8846_regulators);
 525                 regmap_config = &act8865_regmap_config;
 526                 off_reg = ACT8846_GLB_OFF_CTRL;
 527                 off_mask = ACT8846_OFF_SYSMASK;
 528                 break;
 529         case ACT8865:
 530                 if (voltage_select) {
 531                         regulators = act8865_alt_regulators;
 532                         num_regulators = ARRAY_SIZE(act8865_alt_regulators);
 533                 } else {
 534                         regulators = act8865_regulators;
 535                         num_regulators = ARRAY_SIZE(act8865_regulators);
 536                 }
 537                 regmap_config = &act8865_regmap_config;
 538                 off_reg = ACT8865_SYS_CTRL;
 539                 off_mask = ACT8865_MSTROFF;
 540                 break;
 541         default:
 542                 dev_err(dev, "invalid device id %lu\n", type);
 543                 return -EINVAL;
 544         }
 545
 546         if (dev->of_node && !pdata) {
 547                 ret = act8865_pdata_from_dt(dev, &pdata_of, type);
 548                 if (ret < 0)
 549                         return ret;
 550
 551                 pdata = &pdata_of;
 552         }
 553
 554         act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
 555         if (!act8865)
 556                 return -ENOMEM;
 557
 558         act8865->regmap = devm_regmap_init_i2c(client, regmap_config);
 559         if (IS_ERR(act8865->regmap)) {
 560                 ret = PTR_ERR(act8865->regmap);
 561                 dev_err(dev, "Failed to allocate register map: %d\n", ret);
 562                 return ret;
 563         }
 564
 565         if (of_device_is_system_power_controller(dev->of_node)) {
 566                 if (!pm_power_off && (off_reg > 0)) {
 567                         act8865_i2c_client = client;
 568                         act8865->off_reg = off_reg;
 569                         act8865->off_mask = off_mask;
 570                         pm_power_off = act8865_power_off;
 571                 } else {
 572                         dev_err(dev, "Failed to set poweroff capability, already defined\n");
 573                 }
 574         }
 575
 576         /* Finally register devices */
 577         for (i = 0; i < num_regulators; i++) {
 578                 const struct regulator_desc *desc = &regulators[i];
 579                 struct regulator_config config = { };
 580                 struct act8865_regulator_data *rdata;
 581                 struct regulator_dev *rdev;
 582
 583                 config.dev = dev;
 584                 config.driver_data = act8865;
 585                 config.regmap = act8865->regmap;
 586
 587                 rdata = act8865_get_regulator_data(desc->id, pdata);
 588                 if (rdata) {
 589                         config.init_data = rdata->init_data;
 590                         config.of_node = rdata->of_node;
 591                 }
 592
 593                 rdev = devm_regulator_register(dev, desc, &config);
 594                 if (IS_ERR(rdev)) {
 595                         dev_err(dev, "failed to register %s\n", desc->name);
 596                         return PTR_ERR(rdev);
 597                 }
 598         }
 599
 600         i2c_set_clientdata(client, act8865);
 601
 602         return 0;
 603 }
 604
 605 static const struct i2c_device_id act8865_ids[] = {
 606         { .name = "act8600", .driver_data = ACT8600 },
 607         { .name = "act8846", .driver_data = ACT8846 },
 608         { .name = "act8865", .driver_data = ACT8865 },
 609         { },
 610 };
 611 MODULE_DEVICE_TABLE(i2c, act8865_ids);
 612
 613 static struct i2c_driver act8865_pmic_driver = {
 614         .driver = {
 615                 .name   = "act8865",
 616         },
 617         .probe          = act8865_pmic_probe,
 618         .id_table       = act8865_ids,
 619 };
 620
 621 module_i2c_driver(act8865_pmic_driver);
 622
 623 MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
 624 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
 625 MODULE_LICENSE("GPL v2");