drivers/regulator/88pm8607.c

   1 /*
   2  * Regulators driver for Marvell 88PM8607
   3  *
   4  * Copyright (C) 2009 Marvell International Ltd.
   5  *      Haojian Zhuang <haojian.zhuang@marvell.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/err.h>
  14 #include <linux/i2c.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/machine.h>
  18 #include <linux/mfd/88pm860x.h>
  19
  20 struct pm8607_regulator_info {
  21         struct regulator_desc   desc;
  22         struct pm860x_chip      *chip;
  23         struct regulator_dev    *regulator;
  24         struct i2c_client       *i2c;
  25
  26         unsigned int    *vol_table;
  27         unsigned int    *vol_suspend;
  28
  29         int     vol_reg;
  30         int     vol_shift;
  31         int     vol_nbits;
  32         int     update_reg;
  33         int     update_bit;
  34         int     enable_reg;
  35         int     enable_bit;
  36         int     slope_double;
  37 };
  38
  39 static const unsigned int BUCK1_table[] = {
  40          725000,  750000,  775000,  800000,  825000,  850000,  875000,  900000,
  41          925000,  950000,  975000, 1000000, 1025000, 1050000, 1075000, 1100000,
  42         1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
  43         1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
  44               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  45          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  46          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  47          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  48 };
  49
  50 static const unsigned int BUCK1_suspend_table[] = {
  51               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  52          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  53          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  54          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  55          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  56         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  57         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  58         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  59 };
  60
  61 static const unsigned int BUCK2_table[] = {
  62               0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  63          400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  64          800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  65         1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  66         1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  67         2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  68         2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  69         2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  70 };
  71
  72 static const unsigned int BUCK2_suspend_table[] = {
  73               0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  74          400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  75          800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  76         1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  77         1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  78         2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  79         2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  80         2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  81 };
  82
  83 static const unsigned int BUCK3_table[] = {
  84               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  85          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  86          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  87          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  88          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  89         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  90         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  91         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  92 };
  93
  94 static const unsigned int BUCK3_suspend_table[] = {
  95               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  96          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  97          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  98          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  99          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
 100         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
 101         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
 102         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
 103 };
 104
 105 static const unsigned int LDO1_table[] = {
 106         1800000, 1200000, 2800000, 0,
 107 };
 108
 109 static const unsigned int LDO1_suspend_table[] = {
 110         1800000, 1200000, 0, 0,
 111 };
 112
 113 static const unsigned int LDO2_table[] = {
 114         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 115 };
 116
 117 static const unsigned int LDO2_suspend_table[] = {
 118         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 119 };
 120
 121 static const unsigned int LDO3_table[] = {
 122         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 123 };
 124
 125 static const unsigned int LDO3_suspend_table[] = {
 126         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 127 };
 128
 129 static const unsigned int LDO4_table[] = {
 130         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
 131 };
 132
 133 static const unsigned int LDO4_suspend_table[] = {
 134         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
 135 };
 136
 137 static const unsigned int LDO5_table[] = {
 138         2900000, 3000000, 3100000, 3300000,
 139 };
 140
 141 static const unsigned int LDO5_suspend_table[] = {
 142         2900000, 0, 0, 0,
 143 };
 144
 145 static const unsigned int LDO6_table[] = {
 146         1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
 147 };
 148
 149 static const unsigned int LDO6_suspend_table[] = {
 150         1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
 151 };
 152
 153 static const unsigned int LDO7_table[] = {
 154         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 155 };
 156
 157 static const unsigned int LDO7_suspend_table[] = {
 158         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 159 };
 160
 161 static const unsigned int LDO8_table[] = {
 162         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 163 };
 164
 165 static const unsigned int LDO8_suspend_table[] = {
 166         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 167 };
 168
 169 static const unsigned int LDO9_table[] = {
 170         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 171 };
 172
 173 static const unsigned int LDO9_suspend_table[] = {
 174         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 175 };
 176
 177 static const unsigned int LDO10_table[] = {
 178         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 179         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 180 };
 181
 182 static const unsigned int LDO10_suspend_table[] = {
 183         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 184         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 185 };
 186
 187 static const unsigned int LDO12_table[] = {
 188         1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
 189         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 190 };
 191
 192 static const unsigned int LDO12_suspend_table[] = {
 193         1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
 194         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 195 };
 196
 197 static const unsigned int LDO13_table[] = {
 198         1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0, 0,
 199 };
 200
 201 static const unsigned int LDO13_suspend_table[] = {
 202         0,
 203 };
 204
 205 static const unsigned int LDO14_table[] = {
 206         1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
 207 };
 208
 209 static const unsigned int LDO14_suspend_table[] = {
 210         1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
 211 };
 212
 213 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
 214 {
 215         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 216         int ret = -EINVAL;
 217
 218         if (info->vol_table && (index < (1 << info->vol_nbits))) {
 219                 ret = info->vol_table[index];
 220                 if (info->slope_double)
 221                         ret <<= 1;
 222         }
 223         return ret;
 224 }
 225
 226 static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
 227 {
 228         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 229         int i, ret = -ENOENT;
 230
 231         if (info->slope_double) {
 232                 min_uV = min_uV >> 1;
 233                 max_uV = max_uV >> 1;
 234         }
 235         if (info->vol_table) {
 236                 for (i = 0; i < (1 << info->vol_nbits); i++) {
 237                         if (!info->vol_table[i])
 238                                 break;
 239                         if ((min_uV <= info->vol_table[i])
 240                                 && (max_uV >= info->vol_table[i])) {
 241                                 ret = i;
 242                                 break;
 243                         }
 244                 }
 245         }
 246         if (ret < 0)
 247                 pr_err("invalid voltage range (%d %d) uV\n", min_uV, max_uV);
 248         return ret;
 249 }
 250
 251 static int pm8607_set_voltage(struct regulator_dev *rdev,
 252                               int min_uV, int max_uV, unsigned *selector)
 253 {
 254         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 255         uint8_t val, mask;
 256         int ret;
 257
 258         if (min_uV > max_uV) {
 259                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 260                 return -EINVAL;
 261         }
 262
 263         ret = choose_voltage(rdev, min_uV, max_uV);
 264         if (ret < 0)
 265                 return -EINVAL;
 266         *selector = ret;
 267         val = (uint8_t)(ret << info->vol_shift);
 268         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 269
 270         ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val);
 271         if (ret)
 272                 return ret;
 273         switch (info->desc.id) {
 274         case PM8607_ID_BUCK1:
 275         case PM8607_ID_BUCK3:
 276                 ret = pm860x_set_bits(info->i2c, info->update_reg,
 277                                       1 << info->update_bit,
 278                                       1 << info->update_bit);
 279                 break;
 280         }
 281         return ret;
 282 }
 283
 284 static int pm8607_get_voltage(struct regulator_dev *rdev)
 285 {
 286         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 287         uint8_t val, mask;
 288         int ret;
 289
 290         ret = pm860x_reg_read(info->i2c, info->vol_reg);
 291         if (ret < 0)
 292                 return ret;
 293
 294         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 295         val = ((unsigned char)ret & mask) >> info->vol_shift;
 296
 297         return pm8607_list_voltage(rdev, val);
 298 }
 299
 300 static int pm8607_enable(struct regulator_dev *rdev)
 301 {
 302         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 303
 304         return pm860x_set_bits(info->i2c, info->enable_reg,
 305                                1 << info->enable_bit,
 306                                1 << info->enable_bit);
 307 }
 308
 309 static int pm8607_disable(struct regulator_dev *rdev)
 310 {
 311         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 312
 313         return pm860x_set_bits(info->i2c, info->enable_reg,
 314                                1 << info->enable_bit, 0);
 315 }
 316
 317 static int pm8607_is_enabled(struct regulator_dev *rdev)
 318 {
 319         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 320         int ret;
 321
 322         ret = pm860x_reg_read(info->i2c, info->enable_reg);
 323         if (ret < 0)
 324                 return ret;
 325
 326         return !!((unsigned char)ret & (1 << info->enable_bit));
 327 }
 328
 329 static struct regulator_ops pm8607_regulator_ops = {
 330         .set_voltage    = pm8607_set_voltage,
 331         .get_voltage    = pm8607_get_voltage,
 332         .enable         = pm8607_enable,
 333         .disable        = pm8607_disable,
 334         .is_enabled     = pm8607_is_enabled,
 335 };
 336
 337 #define PM8607_DVC(vreg, nbits, ureg, ubit, ereg, ebit)                 \
 338 {                                                                       \
 339         .desc   = {                                                     \
 340                 .name   = #vreg,                                        \
 341                 .ops    = &pm8607_regulator_ops,                        \
 342                 .type   = REGULATOR_VOLTAGE,                            \
 343                 .id     = PM8607_ID_##vreg,                             \
 344                 .owner  = THIS_MODULE,                                  \
 345         },                                                              \
 346         .vol_reg        = PM8607_##vreg,                                \
 347         .vol_shift      = (0),                                          \
 348         .vol_nbits      = (nbits),                                      \
 349         .update_reg     = PM8607_##ureg,                                \
 350         .update_bit     = (ubit),                                       \
 351         .enable_reg     = PM8607_##ereg,                                \
 352         .enable_bit     = (ebit),                                       \
 353         .slope_double   = (0),                                          \
 354         .vol_table      = (unsigned int *)&vreg##_table,                \
 355         .vol_suspend    = (unsigned int *)&vreg##_suspend_table,        \
 356 }
 357
 358 #define PM8607_LDO(_id, vreg, shift, nbits, ereg, ebit)                 \
 359 {                                                                       \
 360         .desc   = {                                                     \
 361                 .name   = "LDO" #_id,                                   \
 362                 .ops    = &pm8607_regulator_ops,                        \
 363                 .type   = REGULATOR_VOLTAGE,                            \
 364                 .id     = PM8607_ID_LDO##_id,                           \
 365                 .owner  = THIS_MODULE,                                  \
 366         },                                                              \
 367         .vol_reg        = PM8607_##vreg,                                \
 368         .vol_shift      = (shift),                                      \
 369         .vol_nbits      = (nbits),                                      \
 370         .enable_reg     = PM8607_##ereg,                                \
 371         .enable_bit     = (ebit),                                       \
 372         .slope_double   = (0),                                          \
 373         .vol_table      = (unsigned int *)&LDO##_id##_table,            \
 374         .vol_suspend    = (unsigned int *)&LDO##_id##_suspend_table,    \
 375 }
 376
 377 static struct pm8607_regulator_info pm8607_regulator_info[] = {
 378         PM8607_DVC(BUCK1, 6, GO, 0, SUPPLIES_EN11, 0),
 379         PM8607_DVC(BUCK2, 6, GO, 1, SUPPLIES_EN11, 1),
 380         PM8607_DVC(BUCK3, 6, GO, 2, SUPPLIES_EN11, 2),
 381
 382         PM8607_LDO( 1,         LDO1, 0, 2, SUPPLIES_EN11, 3),
 383         PM8607_LDO( 2,         LDO2, 0, 3, SUPPLIES_EN11, 4),
 384         PM8607_LDO( 3,         LDO3, 0, 3, SUPPLIES_EN11, 5),
 385         PM8607_LDO( 4,         LDO4, 0, 3, SUPPLIES_EN11, 6),
 386         PM8607_LDO( 5,         LDO5, 0, 2, SUPPLIES_EN11, 7),
 387         PM8607_LDO( 6,         LDO6, 0, 3, SUPPLIES_EN12, 0),
 388         PM8607_LDO( 7,         LDO7, 0, 3, SUPPLIES_EN12, 1),
 389         PM8607_LDO( 8,         LDO8, 0, 3, SUPPLIES_EN12, 2),
 390         PM8607_LDO( 9,         LDO9, 0, 3, SUPPLIES_EN12, 3),
 391         PM8607_LDO(10,        LDO10, 0, 3, SUPPLIES_EN12, 4),
 392         PM8607_LDO(12,        LDO12, 0, 4, SUPPLIES_EN12, 5),
 393         PM8607_LDO(13, VIBRATOR_SET, 1, 3,  VIBRATOR_SET, 0),
 394         PM8607_LDO(14,        LDO14, 0, 4, SUPPLIES_EN12, 6),
 395 };
 396
 397 static inline struct pm8607_regulator_info *find_regulator_info(int id)
 398 {
 399         struct pm8607_regulator_info *info;
 400         int i;
 401
 402         for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
 403                 info = &pm8607_regulator_info[i];
 404                 if (info->desc.id == id)
 405                         return info;
 406         }
 407         return NULL;
 408 }
 409
 410 static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
 411 {
 412         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 413         struct pm860x_platform_data *pdata = chip->dev->platform_data;
 414         struct pm8607_regulator_info *info = NULL;
 415
 416         info = find_regulator_info(pdev->id);
 417         if (info == NULL) {
 418                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
 419                 return -EINVAL;
 420         }
 421
 422         info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 423         info->chip = chip;
 424
 425         info->regulator = regulator_register(&info->desc, &pdev->dev,
 426                                              pdata->regulator[pdev->id], info);
 427         if (IS_ERR(info->regulator)) {
 428                 dev_err(&pdev->dev, "failed to register regulator %s\n",
 429                         info->desc.name);
 430                 return PTR_ERR(info->regulator);
 431         }
 432
 433         /* check DVC ramp slope double */
 434         if (info->desc.id == PM8607_ID_BUCK3)
 435                 if (info->chip->buck3_double)
 436                         info->slope_double = 1;
 437
 438         platform_set_drvdata(pdev, info);
 439         return 0;
 440 }
 441
 442 static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
 443 {
 444         struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
 445
 446         platform_set_drvdata(pdev, NULL);
 447         regulator_unregister(info->regulator);
 448         return 0;
 449 }
 450
 451 static struct platform_driver pm8607_regulator_driver = {
 452         .driver         = {
 453                 .name   = "88pm860x-regulator",
 454                 .owner  = THIS_MODULE,
 455         },
 456         .probe          = pm8607_regulator_probe,
 457         .remove         = __devexit_p(pm8607_regulator_remove),
 458 };
 459
 460 static int __init pm8607_regulator_init(void)
 461 {
 462         return platform_driver_register(&pm8607_regulator_driver);
 463 }
 464 subsys_initcall(pm8607_regulator_init);
 465
 466 static void __exit pm8607_regulator_exit(void)
 467 {
 468         platform_driver_unregister(&pm8607_regulator_driver);
 469 }
 470 module_exit(pm8607_regulator_exit);
 471
 472 MODULE_LICENSE("GPL");
 473 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 474 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
 475 MODULE_ALIAS("platform:88pm8607-regulator");