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/of.h>
  16 #include <linux/regulator/of_regulator.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/mfd/88pm860x.h>
  21 #include <linux/module.h>
  22
  23 struct pm8607_regulator_info {
  24         struct regulator_desc   desc;
  25         struct pm860x_chip      *chip;
  26         struct regulator_dev    *regulator;
  27         struct i2c_client       *i2c;
  28         struct i2c_client       *i2c_8606;
  29
  30         unsigned int    *vol_table;
  31         unsigned int    *vol_suspend;
  32
  33         int     slope_double;
  34 };
  35
  36 static const unsigned int BUCK1_table[] = {
  37          725000,  750000,  775000,  800000,  825000,  850000,  875000,  900000,
  38          925000,  950000,  975000, 1000000, 1025000, 1050000, 1075000, 1100000,
  39         1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
  40         1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
  41               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  42          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  43          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  44          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  45 };
  46
  47 static const unsigned int BUCK1_suspend_table[] = {
  48               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  49          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  50          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  51          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  52          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  53         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  54         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  55         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  56 };
  57
  58 static const unsigned int BUCK2_table[] = {
  59               0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  60          400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  61          800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  62         1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  63         1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  64         2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  65         2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  66         2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  67 };
  68
  69 static const unsigned int BUCK2_suspend_table[] = {
  70               0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  71          400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  72          800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  73         1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  74         1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  75         2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  76         2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  77         2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  78 };
  79
  80 static const unsigned int BUCK3_table[] = {
  81               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  82          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  83          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  84          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  85          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  86         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  87         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  88         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  89 };
  90
  91 static const unsigned int BUCK3_suspend_table[] = {
  92               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  93          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  94          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  95          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  96          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  97         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  98         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  99         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
 100 };
 101
 102 static const unsigned int LDO1_table[] = {
 103         1800000, 1200000, 2800000, 0,
 104 };
 105
 106 static const unsigned int LDO1_suspend_table[] = {
 107         1800000, 1200000, 0, 0,
 108 };
 109
 110 static const unsigned int LDO2_table[] = {
 111         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 112 };
 113
 114 static const unsigned int LDO2_suspend_table[] = {
 115         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 116 };
 117
 118 static const unsigned int LDO3_table[] = {
 119         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 120 };
 121
 122 static const unsigned int LDO3_suspend_table[] = {
 123         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 124 };
 125
 126 static const unsigned int LDO4_table[] = {
 127         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
 128 };
 129
 130 static const unsigned int LDO4_suspend_table[] = {
 131         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
 132 };
 133
 134 static const unsigned int LDO5_table[] = {
 135         2900000, 3000000, 3100000, 3300000,
 136 };
 137
 138 static const unsigned int LDO5_suspend_table[] = {
 139         2900000, 0, 0, 0,
 140 };
 141
 142 static const unsigned int LDO6_table[] = {
 143         1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
 144 };
 145
 146 static const unsigned int LDO6_suspend_table[] = {
 147         1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
 148 };
 149
 150 static const unsigned int LDO7_table[] = {
 151         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 152 };
 153
 154 static const unsigned int LDO7_suspend_table[] = {
 155         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 156 };
 157
 158 static const unsigned int LDO8_table[] = {
 159         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 160 };
 161
 162 static const unsigned int LDO8_suspend_table[] = {
 163         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 164 };
 165
 166 static const unsigned int LDO9_table[] = {
 167         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 168 };
 169
 170 static const unsigned int LDO9_suspend_table[] = {
 171         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 172 };
 173
 174 static const unsigned int LDO10_table[] = {
 175         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 176         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 177 };
 178
 179 static const unsigned int LDO10_suspend_table[] = {
 180         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 181         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 182 };
 183
 184 static const unsigned int LDO12_table[] = {
 185         1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
 186         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 187 };
 188
 189 static const unsigned int LDO12_suspend_table[] = {
 190         1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
 191         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 192 };
 193
 194 static const unsigned int LDO13_table[] = {
 195         1200000, 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0,
 196 };
 197
 198 static const unsigned int LDO13_suspend_table[] = {
 199         0,
 200 };
 201
 202 static const unsigned int LDO14_table[] = {
 203         1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
 204 };
 205
 206 static const unsigned int LDO14_suspend_table[] = {
 207         1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
 208 };
 209
 210 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
 211 {
 212         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 213         int ret = -EINVAL;
 214
 215         if (info->vol_table && (index < rdev->desc->n_voltages)) {
 216                 ret = info->vol_table[index];
 217                 if (info->slope_double)
 218                         ret <<= 1;
 219         }
 220         return ret;
 221 }
 222
 223 static int pm8606_preg_enable(struct regulator_dev *rdev)
 224 {
 225         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 226
 227         return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 228                                1 << rdev->desc->enable_mask, 0);
 229 }
 230
 231 static int pm8606_preg_disable(struct regulator_dev *rdev)
 232 {
 233         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 234
 235         return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 236                                1 << rdev->desc->enable_mask,
 237                                1 << rdev->desc->enable_mask);
 238 }
 239
 240 static int pm8606_preg_is_enabled(struct regulator_dev *rdev)
 241 {
 242         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 243         int ret;
 244
 245         ret = pm860x_reg_read(info->i2c, rdev->desc->enable_reg);
 246         if (ret < 0)
 247                 return ret;
 248
 249         return !((unsigned char)ret & (1 << rdev->desc->enable_mask));
 250 }
 251
 252 static struct regulator_ops pm8607_regulator_ops = {
 253         .list_voltage   = pm8607_list_voltage,
 254         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 255         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 256         .enable = regulator_enable_regmap,
 257         .disable = regulator_disable_regmap,
 258         .is_enabled = regulator_is_enabled_regmap,
 259 };
 260
 261 static struct regulator_ops pm8606_preg_ops = {
 262         .enable         = pm8606_preg_enable,
 263         .disable        = pm8606_preg_disable,
 264         .is_enabled     = pm8606_preg_is_enabled,
 265 };
 266
 267 #define PM8606_PREG(ereg, ebit)                                         \
 268 {                                                                       \
 269         .desc   = {                                                     \
 270                 .name   = "PREG",                                       \
 271                 .ops    = &pm8606_preg_ops,                             \
 272                 .type   = REGULATOR_CURRENT,                            \
 273                 .id     = PM8606_ID_PREG,                               \
 274                 .owner  = THIS_MODULE,                                  \
 275                 .enable_reg = PM8606_##ereg,                            \
 276                 .enable_mask = (ebit),                                  \
 277         },                                                              \
 278 }
 279
 280 #define PM8607_DVC(vreg, ureg, ubit, ereg, ebit)                        \
 281 {                                                                       \
 282         .desc   = {                                                     \
 283                 .name   = #vreg,                                        \
 284                 .ops    = &pm8607_regulator_ops,                        \
 285                 .type   = REGULATOR_VOLTAGE,                            \
 286                 .id     = PM8607_ID_##vreg,                             \
 287                 .owner  = THIS_MODULE,                                  \
 288                 .n_voltages = ARRAY_SIZE(vreg##_table),                 \
 289                 .vsel_reg = PM8607_##vreg,                              \
 290                 .vsel_mask = ARRAY_SIZE(vreg##_table) - 1,              \
 291                 .apply_reg = PM8607_##ureg,                             \
 292                 .apply_bit = (ubit),                                    \
 293                 .enable_reg = PM8607_##ereg,                            \
 294                 .enable_mask = 1 << (ebit),                             \
 295         },                                                              \
 296         .slope_double   = (0),                                          \
 297         .vol_table      = (unsigned int *)&vreg##_table,                \
 298         .vol_suspend    = (unsigned int *)&vreg##_suspend_table,        \
 299 }
 300
 301 #define PM8607_LDO(_id, vreg, shift, ereg, ebit)                        \
 302 {                                                                       \
 303         .desc   = {                                                     \
 304                 .name   = "LDO" #_id,                                   \
 305                 .ops    = &pm8607_regulator_ops,                        \
 306                 .type   = REGULATOR_VOLTAGE,                            \
 307                 .id     = PM8607_ID_LDO##_id,                           \
 308                 .owner  = THIS_MODULE,                                  \
 309                 .n_voltages = ARRAY_SIZE(LDO##_id##_table),             \
 310                 .vsel_reg = PM8607_##vreg,                              \
 311                 .vsel_mask = (ARRAY_SIZE(LDO##_id##_table) - 1) << (shift), \
 312                 .enable_reg = PM8607_##ereg,                            \
 313                 .enable_mask = 1 << (ebit),                             \
 314         },                                                              \
 315         .slope_double   = (0),                                          \
 316         .vol_table      = (unsigned int *)&LDO##_id##_table,            \
 317         .vol_suspend    = (unsigned int *)&LDO##_id##_suspend_table,    \
 318 }
 319
 320 static struct pm8607_regulator_info pm8607_regulator_info[] = {
 321         PM8607_DVC(BUCK1, GO, BIT(0), SUPPLIES_EN11, 0),
 322         PM8607_DVC(BUCK2, GO, BIT(1), SUPPLIES_EN11, 1),
 323         PM8607_DVC(BUCK3, GO, BIT(2), SUPPLIES_EN11, 2),
 324
 325         PM8607_LDO(1,         LDO1, 0, SUPPLIES_EN11, 3),
 326         PM8607_LDO(2,         LDO2, 0, SUPPLIES_EN11, 4),
 327         PM8607_LDO(3,         LDO3, 0, SUPPLIES_EN11, 5),
 328         PM8607_LDO(4,         LDO4, 0, SUPPLIES_EN11, 6),
 329         PM8607_LDO(5,         LDO5, 0, SUPPLIES_EN11, 7),
 330         PM8607_LDO(6,         LDO6, 0, SUPPLIES_EN12, 0),
 331         PM8607_LDO(7,         LDO7, 0, SUPPLIES_EN12, 1),
 332         PM8607_LDO(8,         LDO8, 0, SUPPLIES_EN12, 2),
 333         PM8607_LDO(9,         LDO9, 0, SUPPLIES_EN12, 3),
 334         PM8607_LDO(10,        LDO10, 0, SUPPLIES_EN12, 4),
 335         PM8607_LDO(12,        LDO12, 0, SUPPLIES_EN12, 5),
 336         PM8607_LDO(13, VIBRATOR_SET, 1, VIBRATOR_SET, 0),
 337         PM8607_LDO(14,        LDO14, 0, SUPPLIES_EN12, 6),
 338 };
 339
 340 static struct pm8607_regulator_info pm8606_regulator_info[] = {
 341         PM8606_PREG(PREREGULATORB, 5),
 342 };
 343
 344 #ifdef CONFIG_OF
 345 static int pm8607_regulator_dt_init(struct platform_device *pdev,
 346                                     struct pm8607_regulator_info *info,
 347                                     struct regulator_config *config)
 348 {
 349         struct device_node *nproot, *np;
 350         nproot = of_node_get(pdev->dev.parent->of_node);
 351         if (!nproot)
 352                 return -ENODEV;
 353         nproot = of_find_node_by_name(nproot, "regulators");
 354         if (!nproot) {
 355                 dev_err(&pdev->dev, "failed to find regulators node\n");
 356                 return -ENODEV;
 357         }
 358         for_each_child_of_node(nproot, np) {
 359                 if (!of_node_cmp(np->name, info->desc.name)) {
 360                         config->init_data =
 361                                 of_get_regulator_init_data(&pdev->dev, np);
 362                         config->of_node = np;
 363                         break;
 364                 }
 365         }
 366         of_node_put(nproot);
 367         return 0;
 368 }
 369 #else
 370 #define pm8607_regulator_dt_init(x, y, z)       (-1)
 371 #endif
 372
 373 static int pm8607_regulator_probe(struct platform_device *pdev)
 374 {
 375         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 376         struct pm8607_regulator_info *info = NULL;
 377         struct regulator_init_data *pdata = pdev->dev.platform_data;
 378         struct regulator_config config = { };
 379         struct resource *res;
 380         int i;
 381
 382         res = platform_get_resource(pdev, IORESOURCE_REG, 0);
 383         if (res) {
 384                 /* There're resources in 88PM8607 regulator driver */
 385                 for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
 386                         info = &pm8607_regulator_info[i];
 387                         if (info->desc.vsel_reg == res->start)
 388                                 break;
 389                 }
 390                 if (i == ARRAY_SIZE(pm8607_regulator_info)) {
 391                         dev_err(&pdev->dev, "Failed to find regulator %llu\n",
 392                                 (unsigned long long)res->start);
 393                         return -EINVAL;
 394                 }
 395         } else {
 396                 /* There's no resource in 88PM8606 PREG regulator driver */
 397                 info = &pm8606_regulator_info[0];
 398                 /* i is used to check regulator ID */
 399                 i = -1;
 400         }
 401         info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 402         info->i2c_8606 = (chip->id == CHIP_PM8607) ? chip->companion :
 403                         chip->client;
 404         info->chip = chip;
 405
 406         /* check DVC ramp slope double */
 407         if ((i == PM8607_ID_BUCK3) && info->chip->buck3_double)
 408                 info->slope_double = 1;
 409
 410         config.dev = &pdev->dev;
 411         config.driver_data = info;
 412
 413         if (pm8607_regulator_dt_init(pdev, info, &config))
 414                 if (pdata)
 415                         config.init_data = pdata;
 416
 417         if (chip->id == CHIP_PM8607)
 418                 config.regmap = chip->regmap;
 419         else
 420                 config.regmap = chip->regmap_companion;
 421
 422         info->regulator = regulator_register(&info->desc, &config);
 423         if (IS_ERR(info->regulator)) {
 424                 dev_err(&pdev->dev, "failed to register regulator %s\n",
 425                         info->desc.name);
 426                 return PTR_ERR(info->regulator);
 427         }
 428
 429         platform_set_drvdata(pdev, info);
 430         return 0;
 431 }
 432
 433 static int pm8607_regulator_remove(struct platform_device *pdev)
 434 {
 435         struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
 436
 437         platform_set_drvdata(pdev, NULL);
 438         regulator_unregister(info->regulator);
 439         return 0;
 440 }
 441
 442 static struct platform_device_id pm8607_regulator_driver_ids[] = {
 443         {
 444                 .name   = "88pm860x-regulator",
 445                 .driver_data    = 0,
 446         }, {
 447                 .name   = "88pm860x-preg",
 448                 .driver_data    = 0,
 449         },
 450         { },
 451 };
 452 MODULE_DEVICE_TABLE(platform, pm8607_regulator_driver_ids);
 453
 454 static struct platform_driver pm8607_regulator_driver = {
 455         .driver         = {
 456                 .name   = "88pm860x-regulator",
 457                 .owner  = THIS_MODULE,
 458         },
 459         .probe          = pm8607_regulator_probe,
 460         .remove         = pm8607_regulator_remove,
 461         .id_table       = pm8607_regulator_driver_ids,
 462 };
 463
 464 static int __init pm8607_regulator_init(void)
 465 {
 466         return platform_driver_register(&pm8607_regulator_driver);
 467 }
 468 subsys_initcall(pm8607_regulator_init);
 469
 470 static void __exit pm8607_regulator_exit(void)
 471 {
 472         platform_driver_unregister(&pm8607_regulator_driver);
 473 }
 474 module_exit(pm8607_regulator_exit);
 475
 476 MODULE_LICENSE("GPL");
 477 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 478 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
 479 MODULE_ALIAS("platform:88pm8607-regulator");