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     update_reg;
  34         int     update_bit;
  35         int     slope_double;
  36 };
  37
  38 static const unsigned int BUCK1_table[] = {
  39          725000,  750000,  775000,  800000,  825000,  850000,  875000,  900000,
  40          925000,  950000,  975000, 1000000, 1025000, 1050000, 1075000, 1100000,
  41         1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
  42         1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
  43               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  44          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  45          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  46          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  47 };
  48
  49 static const unsigned int BUCK1_suspend_table[] = {
  50               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  51          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  52          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  53          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  54          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  55         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  56         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  57         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  58 };
  59
  60 static const unsigned int BUCK2_table[] = {
  61               0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  62          400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  63          800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  64         1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  65         1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  66         2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  67         2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  68         2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  69 };
  70
  71 static const unsigned int BUCK2_suspend_table[] = {
  72               0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  73          400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  74          800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  75         1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  76         1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  77         2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  78         2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  79         2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  80 };
  81
  82 static const unsigned int BUCK3_table[] = {
  83               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  84          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  85          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  86          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  87          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  88         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  89         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  90         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  91 };
  92
  93 static const unsigned int BUCK3_suspend_table[] = {
  94               0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  95          200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  96          400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  97          600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  98          800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  99         1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
 100         1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
 101         1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
 102 };
 103
 104 static const unsigned int LDO1_table[] = {
 105         1800000, 1200000, 2800000, 0,
 106 };
 107
 108 static const unsigned int LDO1_suspend_table[] = {
 109         1800000, 1200000, 0, 0,
 110 };
 111
 112 static const unsigned int LDO2_table[] = {
 113         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 114 };
 115
 116 static const unsigned int LDO2_suspend_table[] = {
 117         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 118 };
 119
 120 static const unsigned int LDO3_table[] = {
 121         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 122 };
 123
 124 static const unsigned int LDO3_suspend_table[] = {
 125         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 126 };
 127
 128 static const unsigned int LDO4_table[] = {
 129         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
 130 };
 131
 132 static const unsigned int LDO4_suspend_table[] = {
 133         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
 134 };
 135
 136 static const unsigned int LDO5_table[] = {
 137         2900000, 3000000, 3100000, 3300000,
 138 };
 139
 140 static const unsigned int LDO5_suspend_table[] = {
 141         2900000, 0, 0, 0,
 142 };
 143
 144 static const unsigned int LDO6_table[] = {
 145         1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
 146 };
 147
 148 static const unsigned int LDO6_suspend_table[] = {
 149         1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
 150 };
 151
 152 static const unsigned int LDO7_table[] = {
 153         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 154 };
 155
 156 static const unsigned int LDO7_suspend_table[] = {
 157         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 158 };
 159
 160 static const unsigned int LDO8_table[] = {
 161         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 162 };
 163
 164 static const unsigned int LDO8_suspend_table[] = {
 165         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 166 };
 167
 168 static const unsigned int LDO9_table[] = {
 169         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 170 };
 171
 172 static const unsigned int LDO9_suspend_table[] = {
 173         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 174 };
 175
 176 static const unsigned int LDO10_table[] = {
 177         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 178         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 179 };
 180
 181 static const unsigned int LDO10_suspend_table[] = {
 182         1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 183         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 184 };
 185
 186 static const unsigned int LDO12_table[] = {
 187         1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
 188         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 189 };
 190
 191 static const unsigned int LDO12_suspend_table[] = {
 192         1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
 193         1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 194 };
 195
 196 static const unsigned int LDO13_table[] = {
 197         1200000, 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0,
 198 };
 199
 200 static const unsigned int LDO13_suspend_table[] = {
 201         0,
 202 };
 203
 204 static const unsigned int LDO14_table[] = {
 205         1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
 206 };
 207
 208 static const unsigned int LDO14_suspend_table[] = {
 209         1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
 210 };
 211
 212 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
 213 {
 214         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 215         int ret = -EINVAL;
 216
 217         if (info->vol_table && (index < rdev->desc->n_voltages)) {
 218                 ret = info->vol_table[index];
 219                 if (info->slope_double)
 220                         ret <<= 1;
 221         }
 222         return ret;
 223 }
 224
 225 static int pm8607_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 226 {
 227         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 228         uint8_t val;
 229         int ret;
 230
 231         val = (uint8_t)(selector << (ffs(rdev->desc->vsel_mask) - 1));
 232
 233         ret = pm860x_set_bits(info->i2c, rdev->desc->vsel_reg,
 234                               rdev->desc->vsel_mask, val);
 235         if (ret)
 236                 return ret;
 237         switch (info->desc.id) {
 238         case PM8607_ID_BUCK1:
 239         case PM8607_ID_BUCK3:
 240                 ret = pm860x_set_bits(info->i2c, info->update_reg,
 241                                       1 << info->update_bit,
 242                                       1 << info->update_bit);
 243                 break;
 244         }
 245         return ret;
 246 }
 247
 248 static int pm8606_preg_enable(struct regulator_dev *rdev)
 249 {
 250         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 251
 252         return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 253                                1 << rdev->desc->enable_mask, 0);
 254 }
 255
 256 static int pm8606_preg_disable(struct regulator_dev *rdev)
 257 {
 258         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 259
 260         return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 261                                1 << rdev->desc->enable_mask,
 262                                1 << rdev->desc->enable_mask);
 263 }
 264
 265 static int pm8606_preg_is_enabled(struct regulator_dev *rdev)
 266 {
 267         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 268         int ret;
 269
 270         ret = pm860x_reg_read(info->i2c, rdev->desc->enable_reg);
 271         if (ret < 0)
 272                 return ret;
 273
 274         return !((unsigned char)ret & (1 << rdev->desc->enable_mask));
 275 }
 276
 277 static struct regulator_ops pm8607_regulator_ops = {
 278         .list_voltage   = pm8607_list_voltage,
 279         .set_voltage_sel = pm8607_set_voltage_sel,
 280         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 281         .enable = regulator_enable_regmap,
 282         .disable = regulator_disable_regmap,
 283         .is_enabled = regulator_is_enabled_regmap,
 284 };
 285
 286 static struct regulator_ops pm8606_preg_ops = {
 287         .enable         = pm8606_preg_enable,
 288         .disable        = pm8606_preg_disable,
 289         .is_enabled     = pm8606_preg_is_enabled,
 290 };
 291
 292 #define PM8606_PREG(ereg, ebit)                                         \
 293 {                                                                       \
 294         .desc   = {                                                     \
 295                 .name   = "PREG",                                       \
 296                 .ops    = &pm8606_preg_ops,                             \
 297                 .type   = REGULATOR_CURRENT,                            \
 298                 .id     = PM8606_ID_PREG,                               \
 299                 .owner  = THIS_MODULE,                                  \
 300                 .enable_reg = PM8606_##ereg,                            \
 301                 .enable_mask = (ebit),                                  \
 302         },                                                              \
 303 }
 304
 305 #define PM8607_DVC(vreg, ureg, ubit, ereg, ebit)                        \
 306 {                                                                       \
 307         .desc   = {                                                     \
 308                 .name   = #vreg,                                        \
 309                 .ops    = &pm8607_regulator_ops,                        \
 310                 .type   = REGULATOR_VOLTAGE,                            \
 311                 .id     = PM8607_ID_##vreg,                             \
 312                 .owner  = THIS_MODULE,                                  \
 313                 .n_voltages = ARRAY_SIZE(vreg##_table),                 \
 314                 .vsel_reg = PM8607_##vreg,                              \
 315                 .vsel_mask = ARRAY_SIZE(vreg##_table) - 1,              \
 316                 .enable_reg = PM8607_##ereg,                            \
 317                 .enable_mask = 1 << (ebit),                             \
 318         },                                                              \
 319         .update_reg     = PM8607_##ureg,                                \
 320         .update_bit     = (ubit),                                       \
 321         .slope_double   = (0),                                          \
 322         .vol_table      = (unsigned int *)&vreg##_table,                \
 323         .vol_suspend    = (unsigned int *)&vreg##_suspend_table,        \
 324 }
 325
 326 #define PM8607_LDO(_id, vreg, shift, ereg, ebit)                        \
 327 {                                                                       \
 328         .desc   = {                                                     \
 329                 .name   = "LDO" #_id,                                   \
 330                 .ops    = &pm8607_regulator_ops,                        \
 331                 .type   = REGULATOR_VOLTAGE,                            \
 332                 .id     = PM8607_ID_LDO##_id,                           \
 333                 .owner  = THIS_MODULE,                                  \
 334                 .n_voltages = ARRAY_SIZE(LDO##_id##_table),             \
 335                 .vsel_reg = PM8607_##vreg,                              \
 336                 .vsel_mask = (ARRAY_SIZE(LDO##_id##_table) - 1) << (shift), \
 337                 .enable_reg = PM8607_##ereg,                            \
 338                 .enable_mask = 1 << (ebit),                             \
 339         },                                                              \
 340         .slope_double   = (0),                                          \
 341         .vol_table      = (unsigned int *)&LDO##_id##_table,            \
 342         .vol_suspend    = (unsigned int *)&LDO##_id##_suspend_table,    \
 343 }
 344
 345 static struct pm8607_regulator_info pm8607_regulator_info[] = {
 346         PM8607_DVC(BUCK1, GO, 0, SUPPLIES_EN11, 0),
 347         PM8607_DVC(BUCK2, GO, 1, SUPPLIES_EN11, 1),
 348         PM8607_DVC(BUCK3, GO, 2, SUPPLIES_EN11, 2),
 349
 350         PM8607_LDO(1,         LDO1, 0, SUPPLIES_EN11, 3),
 351         PM8607_LDO(2,         LDO2, 0, SUPPLIES_EN11, 4),
 352         PM8607_LDO(3,         LDO3, 0, SUPPLIES_EN11, 5),
 353         PM8607_LDO(4,         LDO4, 0, SUPPLIES_EN11, 6),
 354         PM8607_LDO(5,         LDO5, 0, SUPPLIES_EN11, 7),
 355         PM8607_LDO(6,         LDO6, 0, SUPPLIES_EN12, 0),
 356         PM8607_LDO(7,         LDO7, 0, SUPPLIES_EN12, 1),
 357         PM8607_LDO(8,         LDO8, 0, SUPPLIES_EN12, 2),
 358         PM8607_LDO(9,         LDO9, 0, SUPPLIES_EN12, 3),
 359         PM8607_LDO(10,        LDO10, 0, SUPPLIES_EN12, 4),
 360         PM8607_LDO(12,        LDO12, 0, SUPPLIES_EN12, 5),
 361         PM8607_LDO(13, VIBRATOR_SET, 1, VIBRATOR_SET, 0),
 362         PM8607_LDO(14,        LDO14, 0, SUPPLIES_EN12, 6),
 363 };
 364
 365 static struct pm8607_regulator_info pm8606_regulator_info[] = {
 366         PM8606_PREG(PREREGULATORB, 5),
 367 };
 368
 369 #ifdef CONFIG_OF
 370 static int pm8607_regulator_dt_init(struct platform_device *pdev,
 371                                     struct pm8607_regulator_info *info,
 372                                     struct regulator_config *config)
 373 {
 374         struct device_node *nproot, *np;
 375         nproot = pdev->dev.parent->of_node;
 376         if (!nproot)
 377                 return -ENODEV;
 378         nproot = of_find_node_by_name(nproot, "regulators");
 379         if (!nproot) {
 380                 dev_err(&pdev->dev, "failed to find regulators node\n");
 381                 return -ENODEV;
 382         }
 383         for_each_child_of_node(nproot, np) {
 384                 if (!of_node_cmp(np->name, info->desc.name)) {
 385                         config->init_data =
 386                                 of_get_regulator_init_data(&pdev->dev, np);
 387                         config->of_node = np;
 388                         break;
 389                 }
 390         }
 391         return 0;
 392 }
 393 #else
 394 #define pm8607_regulator_dt_init(x, y, z)       (-1)
 395 #endif
 396
 397 static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
 398 {
 399         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 400         struct pm8607_regulator_info *info = NULL;
 401         struct regulator_init_data *pdata = pdev->dev.platform_data;
 402         struct regulator_config config = { };
 403         struct resource *res;
 404         int i;
 405
 406         res = platform_get_resource(pdev, IORESOURCE_REG, 0);
 407         if (res) {
 408                 /* There're resources in 88PM8607 regulator driver */
 409                 for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
 410                         info = &pm8607_regulator_info[i];
 411                         if (info->desc.vsel_reg == res->start)
 412                                 break;
 413                 }
 414                 if (i == ARRAY_SIZE(pm8607_regulator_info)) {
 415                         dev_err(&pdev->dev, "Failed to find regulator %llu\n",
 416                                 (unsigned long long)res->start);
 417                         return -EINVAL;
 418                 }
 419         } else {
 420                 /* There's no resource in 88PM8606 PREG regulator driver */
 421                 info = &pm8606_regulator_info[0];
 422                 /* i is used to check regulator ID */
 423                 i = -1;
 424         }
 425         info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 426         info->i2c_8606 = (chip->id == CHIP_PM8607) ? chip->companion :
 427                         chip->client;
 428         info->chip = chip;
 429
 430         /* check DVC ramp slope double */
 431         if ((i == PM8607_ID_BUCK3) && info->chip->buck3_double)
 432                 info->slope_double = 1;
 433
 434         config.dev = &pdev->dev;
 435         config.driver_data = info;
 436
 437         if (pm8607_regulator_dt_init(pdev, info, &config))
 438                 if (pdata)
 439                         config.init_data = pdata;
 440
 441         if (chip->id == CHIP_PM8607)
 442                 config.regmap = chip->regmap;
 443         else
 444                 config.regmap = chip->regmap_companion;
 445
 446         info->regulator = regulator_register(&info->desc, &config);
 447         if (IS_ERR(info->regulator)) {
 448                 dev_err(&pdev->dev, "failed to register regulator %s\n",
 449                         info->desc.name);
 450                 return PTR_ERR(info->regulator);
 451         }
 452
 453         platform_set_drvdata(pdev, info);
 454         return 0;
 455 }
 456
 457 static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
 458 {
 459         struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
 460
 461         platform_set_drvdata(pdev, NULL);
 462         regulator_unregister(info->regulator);
 463         return 0;
 464 }
 465
 466 static struct platform_device_id pm8607_regulator_driver_ids[] = {
 467         {
 468                 .name   = "88pm860x-regulator",
 469                 .driver_data    = 0,
 470         }, {
 471                 .name   = "88pm860x-preg",
 472                 .driver_data    = 0,
 473         },
 474         { },
 475 };
 476 MODULE_DEVICE_TABLE(platform, pm8607_regulator_driver_ids);
 477
 478 static struct platform_driver pm8607_regulator_driver = {
 479         .driver         = {
 480                 .name   = "88pm860x-regulator",
 481                 .owner  = THIS_MODULE,
 482         },
 483         .probe          = pm8607_regulator_probe,
 484         .remove         = __devexit_p(pm8607_regulator_remove),
 485         .id_table       = pm8607_regulator_driver_ids,
 486 };
 487
 488 static int __init pm8607_regulator_init(void)
 489 {
 490         return platform_driver_register(&pm8607_regulator_driver);
 491 }
 492 subsys_initcall(pm8607_regulator_init);
 493
 494 static void __exit pm8607_regulator_exit(void)
 495 {
 496         platform_driver_unregister(&pm8607_regulator_driver);
 497 }
 498 module_exit(pm8607_regulator_exit);
 499
 500 MODULE_LICENSE("GPL");
 501 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 502 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
 503 MODULE_ALIAS("platform:88pm8607-regulator");