drivers/regulator/tps65912-regulator.c

   1 /*
   2  * tps65912.c  --  TI tps65912
   3  *
   4  * Copyright 2011 Texas Instruments Inc.
   5  *
   6  * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify it
   9  *  under  the terms of the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the License, or (at your
  11  *  option) any later version.
  12  *
  13  * This driver is based on wm8350 implementation.
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/err.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regulator/driver.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/slab.h>
  24 #include <linux/gpio.h>
  25 #include <linux/mfd/tps65912.h>
  26
  27 /* DCDC's */
  28 #define TPS65912_REG_DCDC1      0
  29 #define TPS65912_REG_DCDC2      1
  30 #define TPS65912_REG_DCDC3      2
  31 #define TPS65912_REG_DCDC4      3
  32
  33 /* LDOs */
  34 #define TPS65912_REG_LDO1       4
  35 #define TPS65912_REG_LDO2       5
  36 #define TPS65912_REG_LDO3       6
  37 #define TPS65912_REG_LDO4       7
  38 #define TPS65912_REG_LDO5       8
  39 #define TPS65912_REG_LDO6       9
  40 #define TPS65912_REG_LDO7       10
  41 #define TPS65912_REG_LDO8       11
  42 #define TPS65912_REG_LDO9       12
  43 #define TPS65912_REG_LDO10      13
  44
  45 /* Number of step-down converters available */
  46 #define TPS65912_NUM_DCDC       4
  47
  48 /* Number of LDO voltage regulators  available */
  49 #define TPS65912_NUM_LDO        10
  50
  51 /* Number of total regulators available */
  52 #define TPS65912_NUM_REGULATOR          (TPS65912_NUM_DCDC + TPS65912_NUM_LDO)
  53
  54 #define TPS65912_REG_ENABLED    0x80
  55 #define OP_SELREG_MASK          0x40
  56 #define OP_SELREG_SHIFT         6
  57
  58 struct tps_info {
  59         const char *name;
  60 };
  61
  62 static struct tps_info tps65912_regs[] = {
  63         {
  64                 .name = "DCDC1",
  65         },
  66         {
  67                 .name = "DCDC2",
  68         },
  69         {
  70                 .name = "DCDC3",
  71         },
  72         {
  73                 .name = "DCDC4",
  74         },
  75         {
  76                 .name = "LDO1",
  77         },
  78         {
  79                 .name = "LDO2",
  80         },
  81         {
  82                 .name = "LDO3",
  83         },
  84         {
  85                 .name = "LDO4",
  86         },
  87         {
  88                 .name = "LDO5",
  89         },
  90         {
  91                 .name = "LDO6",
  92         },
  93         {
  94                 .name = "LDO7",
  95         },
  96         {
  97                 .name = "LDO8",
  98         },
  99         {
 100                 .name = "LDO9",
 101         },
 102         {
 103                 .name = "LDO10",
 104         },
 105 };
 106
 107 struct tps65912_reg {
 108         struct regulator_desc desc[TPS65912_NUM_REGULATOR];
 109         struct tps65912 *mfd;
 110         struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
 111         struct tps_info *info[TPS65912_NUM_REGULATOR];
 112         /* for read/write access */
 113         struct mutex io_lock;
 114         int mode;
 115         int (*get_ctrl_reg)(int);
 116         int dcdc_range[TPS65912_NUM_DCDC];
 117         int pwm_mode_reg;
 118         int eco_reg;
 119 };
 120
 121 static const struct regulator_linear_range tps65912_ldo_ranges[] = {
 122         { .min_uV = 800000, .max_uV = 1600000, .min_sel =  0, .max_sel = 32,
 123           .uV_step = 25000 },
 124         { .min_uV = 1650000, .max_uV = 3000000, .min_sel = 33, .max_sel = 60,
 125           .uV_step = 50000 },
 126         { .min_uV = 3100000, .max_uV = 3300000, .min_sel = 61, .max_sel = 63,
 127           .uV_step = 100000 },
 128 };
 129
 130 static int tps65912_get_range(struct tps65912_reg *pmic, int id)
 131 {
 132         struct tps65912 *mfd = pmic->mfd;
 133         int range;
 134
 135         switch (id) {
 136         case TPS65912_REG_DCDC1:
 137                 range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT);
 138                 break;
 139         case TPS65912_REG_DCDC2:
 140                 range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT);
 141                 break;
 142         case TPS65912_REG_DCDC3:
 143                 range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT);
 144                 break;
 145         case TPS65912_REG_DCDC4:
 146                 range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT);
 147                 break;
 148         default:
 149                 return 0;
 150         }
 151
 152         if (range >= 0)
 153                 range = (range & DCDC_LIMIT_RANGE_MASK)
 154                         >> DCDC_LIMIT_RANGE_SHIFT;
 155
 156         pmic->dcdc_range[id] = range;
 157         return range;
 158 }
 159
 160 static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
 161 {
 162         unsigned long uv;
 163
 164         uv = ((vsel * 12500) + 500000);
 165         return uv;
 166 }
 167
 168 static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
 169 {
 170         unsigned long uv;
 171
 172          uv = ((vsel * 12500) + 700000);
 173         return uv;
 174 }
 175
 176 static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
 177 {
 178         unsigned long uv;
 179
 180         uv = ((vsel * 25000) + 500000);
 181         return uv;
 182 }
 183
 184 static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
 185 {
 186         unsigned long uv;
 187
 188         if (vsel == 0x3f)
 189                 uv = 3800000;
 190         else
 191                 uv = ((vsel * 50000) + 500000);
 192
 193         return uv;
 194 }
 195
 196 static int tps65912_get_ctrl_register(int id)
 197 {
 198         if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
 199                 return id * 3 + TPS65912_DCDC1_AVS;
 200         else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
 201                 return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
 202         else
 203                 return -EINVAL;
 204 }
 205
 206 static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
 207 {
 208         struct tps65912 *mfd = pmic->mfd;
 209         int opvsel;
 210         u8 reg = 0;
 211
 212         if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
 213                 opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
 214                 if (opvsel & OP_SELREG_MASK)
 215                         reg = id * 3 + TPS65912_DCDC1_AVS;
 216                 else
 217                         reg = id * 3 + TPS65912_DCDC1_OP;
 218         } else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
 219                 reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
 220         } else {
 221                 return -EINVAL;
 222         }
 223
 224         return reg;
 225 }
 226
 227 static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
 228 {
 229         switch (id) {
 230         case TPS65912_REG_DCDC1:
 231                 pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
 232                 pmic->eco_reg = TPS65912_DCDC1_AVS;
 233                 break;
 234         case TPS65912_REG_DCDC2:
 235                 pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
 236                 pmic->eco_reg = TPS65912_DCDC2_AVS;
 237                 break;
 238         case TPS65912_REG_DCDC3:
 239                 pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
 240                 pmic->eco_reg = TPS65912_DCDC3_AVS;
 241                 break;
 242         case TPS65912_REG_DCDC4:
 243                 pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
 244                 pmic->eco_reg = TPS65912_DCDC4_AVS;
 245                 break;
 246         default:
 247                 return -EINVAL;
 248         }
 249
 250         return 0;
 251 }
 252
 253 static int tps65912_reg_is_enabled(struct regulator_dev *dev)
 254 {
 255         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 256         struct tps65912 *mfd = pmic->mfd;
 257         int reg, value, id = rdev_get_id(dev);
 258
 259         if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
 260                 return -EINVAL;
 261
 262         reg = pmic->get_ctrl_reg(id);
 263         if (reg < 0)
 264                 return reg;
 265
 266         value = tps65912_reg_read(mfd, reg);
 267         if (value < 0)
 268                 return value;
 269
 270         return value & TPS65912_REG_ENABLED;
 271 }
 272
 273 static int tps65912_reg_enable(struct regulator_dev *dev)
 274 {
 275         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 276         struct tps65912 *mfd = pmic->mfd;
 277         int id = rdev_get_id(dev);
 278         int reg;
 279
 280         if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
 281                 return -EINVAL;
 282
 283         reg = pmic->get_ctrl_reg(id);
 284         if (reg < 0)
 285                 return reg;
 286
 287         return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
 288 }
 289
 290 static int tps65912_reg_disable(struct regulator_dev *dev)
 291 {
 292         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 293         struct tps65912 *mfd = pmic->mfd;
 294         int id = rdev_get_id(dev), reg;
 295
 296         reg = pmic->get_ctrl_reg(id);
 297         if (reg < 0)
 298                 return reg;
 299
 300         return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
 301 }
 302
 303 static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
 304 {
 305         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 306         struct tps65912 *mfd = pmic->mfd;
 307         int pwm_mode, eco, id = rdev_get_id(dev);
 308
 309         tps65912_get_mode_regiters(pmic, id);
 310
 311         pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
 312         eco = tps65912_reg_read(mfd, pmic->eco_reg);
 313
 314         pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
 315         eco &= DCDC_AVS_ECO_MASK;
 316
 317         switch (mode) {
 318         case REGULATOR_MODE_FAST:
 319                 /* Verify if mode alredy set */
 320                 if (pwm_mode && !eco)
 321                         break;
 322                 tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
 323                 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
 324                 break;
 325         case REGULATOR_MODE_NORMAL:
 326         case REGULATOR_MODE_IDLE:
 327                 if (!pwm_mode && !eco)
 328                         break;
 329                 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
 330                 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
 331                 break;
 332         case REGULATOR_MODE_STANDBY:
 333                 if (!pwm_mode && eco)
 334                         break;
 335                 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
 336                 tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
 337                 break;
 338         default:
 339                 return -EINVAL;
 340         }
 341
 342         return 0;
 343 }
 344
 345 static unsigned int tps65912_get_mode(struct regulator_dev *dev)
 346 {
 347         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 348         struct tps65912 *mfd = pmic->mfd;
 349         int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
 350
 351         tps65912_get_mode_regiters(pmic, id);
 352
 353         pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
 354         eco = tps65912_reg_read(mfd, pmic->eco_reg);
 355
 356         pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
 357         eco &= DCDC_AVS_ECO_MASK;
 358
 359         if (pwm_mode && !eco)
 360                 mode = REGULATOR_MODE_FAST;
 361         else if (!pwm_mode && !eco)
 362                 mode = REGULATOR_MODE_NORMAL;
 363         else if (!pwm_mode && eco)
 364                 mode = REGULATOR_MODE_STANDBY;
 365
 366         return mode;
 367 }
 368
 369 static int tps65912_list_voltage(struct regulator_dev *dev, unsigned selector)
 370 {
 371         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 372         int range, voltage = 0, id = rdev_get_id(dev);
 373
 374         if (id > TPS65912_REG_DCDC4)
 375                 return -EINVAL;
 376
 377         range = pmic->dcdc_range[id];
 378
 379         switch (range) {
 380         case 0:
 381                 /* 0.5 - 1.2875V in 12.5mV steps */
 382                 voltage = tps65912_vsel_to_uv_range0(selector);
 383                 break;
 384         case 1:
 385                 /* 0.7 - 1.4875V in 12.5mV steps */
 386                 voltage = tps65912_vsel_to_uv_range1(selector);
 387                 break;
 388         case 2:
 389                 /* 0.5 - 2.075V in 25mV steps */
 390                 voltage = tps65912_vsel_to_uv_range2(selector);
 391                 break;
 392         case 3:
 393                 /* 0.5 - 3.8V in 50mV steps */
 394                 voltage = tps65912_vsel_to_uv_range3(selector);
 395                 break;
 396         }
 397         return voltage;
 398 }
 399
 400 static int tps65912_get_voltage_sel(struct regulator_dev *dev)
 401 {
 402         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 403         struct tps65912 *mfd = pmic->mfd;
 404         int id = rdev_get_id(dev);
 405         int reg, vsel;
 406
 407         reg = tps65912_get_sel_register(pmic, id);
 408         if (reg < 0)
 409                 return reg;
 410
 411         vsel = tps65912_reg_read(mfd, reg);
 412         vsel &= 0x3F;
 413
 414         return vsel;
 415 }
 416
 417 static int tps65912_set_voltage_sel(struct regulator_dev *dev,
 418                                          unsigned selector)
 419 {
 420         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 421         struct tps65912 *mfd = pmic->mfd;
 422         int id = rdev_get_id(dev);
 423         int value;
 424         u8 reg;
 425
 426         reg = tps65912_get_sel_register(pmic, id);
 427         value = tps65912_reg_read(mfd, reg);
 428         value &= 0xC0;
 429         return tps65912_reg_write(mfd, reg, selector | value);
 430 }
 431
 432 /* Operations permitted on DCDCx */
 433 static struct regulator_ops tps65912_ops_dcdc = {
 434         .is_enabled = tps65912_reg_is_enabled,
 435         .enable = tps65912_reg_enable,
 436         .disable = tps65912_reg_disable,
 437         .set_mode = tps65912_set_mode,
 438         .get_mode = tps65912_get_mode,
 439         .get_voltage_sel = tps65912_get_voltage_sel,
 440         .set_voltage_sel = tps65912_set_voltage_sel,
 441         .list_voltage = tps65912_list_voltage,
 442 };
 443
 444 /* Operations permitted on LDOx */
 445 static struct regulator_ops tps65912_ops_ldo = {
 446         .is_enabled = tps65912_reg_is_enabled,
 447         .enable = tps65912_reg_enable,
 448         .disable = tps65912_reg_disable,
 449         .get_voltage_sel = tps65912_get_voltage_sel,
 450         .set_voltage_sel = tps65912_set_voltage_sel,
 451         .list_voltage = regulator_list_voltage_linear_range,
 452         .map_voltage = regulator_map_voltage_linear_range,
 453 };
 454
 455 static int tps65912_probe(struct platform_device *pdev)
 456 {
 457         struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
 458         struct regulator_config config = { };
 459         struct tps_info *info;
 460         struct regulator_init_data *reg_data;
 461         struct regulator_dev *rdev;
 462         struct tps65912_reg *pmic;
 463         struct tps65912_board *pmic_plat_data;
 464         int i, err;
 465
 466         pmic_plat_data = dev_get_platdata(tps65912->dev);
 467         if (!pmic_plat_data)
 468                 return -EINVAL;
 469
 470         reg_data = pmic_plat_data->tps65912_pmic_init_data;
 471
 472         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 473         if (!pmic)
 474                 return -ENOMEM;
 475
 476         mutex_init(&pmic->io_lock);
 477         pmic->mfd = tps65912;
 478         platform_set_drvdata(pdev, pmic);
 479
 480         pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
 481         info = tps65912_regs;
 482
 483         for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
 484                 int range = 0;
 485                 /* Register the regulators */
 486                 pmic->info[i] = info;
 487
 488                 pmic->desc[i].name = info->name;
 489                 pmic->desc[i].id = i;
 490                 pmic->desc[i].n_voltages = 64;
 491                 if (i > TPS65912_REG_DCDC4) {
 492                         pmic->desc[i].ops = &tps65912_ops_ldo;
 493                         pmic->desc[i].linear_ranges = tps65912_ldo_ranges;
 494                         pmic->desc[i].n_linear_ranges =
 495                                         ARRAY_SIZE(tps65912_ldo_ranges);
 496                 } else {
 497                         pmic->desc[i].ops = &tps65912_ops_dcdc;
 498                 }
 499                 pmic->desc[i].type = REGULATOR_VOLTAGE;
 500                 pmic->desc[i].owner = THIS_MODULE;
 501                 range = tps65912_get_range(pmic, i);
 502
 503                 config.dev = tps65912->dev;
 504                 config.init_data = reg_data;
 505                 config.driver_data = pmic;
 506
 507                 rdev = regulator_register(&pmic->desc[i], &config);
 508                 if (IS_ERR(rdev)) {
 509                         dev_err(tps65912->dev,
 510                                 "failed to register %s regulator\n",
 511                                 pdev->name);
 512                         err = PTR_ERR(rdev);
 513                         goto err;
 514                 }
 515
 516                 /* Save regulator for cleanup */
 517                 pmic->rdev[i] = rdev;
 518         }
 519         return 0;
 520
 521 err:
 522         while (--i >= 0)
 523                 regulator_unregister(pmic->rdev[i]);
 524         return err;
 525 }
 526
 527 static int tps65912_remove(struct platform_device *pdev)
 528 {
 529         struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev);
 530         int i;
 531
 532         for (i = 0; i < TPS65912_NUM_REGULATOR; i++)
 533                 regulator_unregister(tps65912_reg->rdev[i]);
 534         return 0;
 535 }
 536
 537 static struct platform_driver tps65912_driver = {
 538         .driver = {
 539                 .name = "tps65912-pmic",
 540                 .owner = THIS_MODULE,
 541         },
 542         .probe = tps65912_probe,
 543         .remove = tps65912_remove,
 544 };
 545
 546 static int __init tps65912_init(void)
 547 {
 548         return platform_driver_register(&tps65912_driver);
 549 }
 550 subsys_initcall(tps65912_init);
 551
 552 static void __exit tps65912_cleanup(void)
 553 {
 554         platform_driver_unregister(&tps65912_driver);
 555 }
 556 module_exit(tps65912_cleanup);
 557
 558 MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
 559 MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
 560 MODULE_LICENSE("GPL v2");
 561 MODULE_ALIAS("platform:tps65912-pmic");