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 int tps65912_get_range(struct tps65912_reg *pmic, int id)
 122 {
 123         struct tps65912 *mfd = pmic->mfd;
 124         int range;
 125
 126         switch (id) {
 127         case TPS65912_REG_DCDC1:
 128                 range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT);
 129                 break;
 130         case TPS65912_REG_DCDC2:
 131                 range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT);
 132                 break;
 133         case TPS65912_REG_DCDC3:
 134                 range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT);
 135                 break;
 136         case TPS65912_REG_DCDC4:
 137                 range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT);
 138                 break;
 139         default:
 140                 return 0;
 141         }
 142
 143         if (range >= 0)
 144                 range = (range & DCDC_LIMIT_RANGE_MASK)
 145                         >> DCDC_LIMIT_RANGE_SHIFT;
 146
 147         pmic->dcdc_range[id] = range;
 148         return range;
 149 }
 150
 151 static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
 152 {
 153         unsigned long uv;
 154
 155         uv = ((vsel * 12500) + 500000);
 156         return uv;
 157 }
 158
 159 static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
 160 {
 161         unsigned long uv;
 162
 163          uv = ((vsel * 12500) + 700000);
 164         return uv;
 165 }
 166
 167 static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
 168 {
 169         unsigned long uv;
 170
 171         uv = ((vsel * 25000) + 500000);
 172         return uv;
 173 }
 174
 175 static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
 176 {
 177         unsigned long uv;
 178
 179         if (vsel == 0x3f)
 180                 uv = 3800000;
 181         else
 182                 uv = ((vsel * 50000) + 500000);
 183
 184         return uv;
 185 }
 186
 187 static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel)
 188 {
 189         unsigned long uv = 0;
 190
 191         if (vsel <= 32)
 192                 uv = ((vsel * 25000) + 800000);
 193         else if (vsel > 32 && vsel <= 60)
 194                 uv = (((vsel - 32) * 50000) + 1600000);
 195         else if (vsel > 60)
 196                 uv = (((vsel - 60) * 100000) + 3000000);
 197
 198         return uv;
 199 }
 200
 201 static int tps65912_get_ctrl_register(int id)
 202 {
 203         if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
 204                 return id * 3 + TPS65912_DCDC1_AVS;
 205         else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
 206                 return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
 207         else
 208                 return -EINVAL;
 209 }
 210
 211 static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
 212 {
 213         struct tps65912 *mfd = pmic->mfd;
 214         int opvsel;
 215         u8 reg = 0;
 216
 217         if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
 218                 opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
 219                 if (opvsel & OP_SELREG_MASK)
 220                         reg = id * 3 + TPS65912_DCDC1_AVS;
 221                 else
 222                         reg = id * 3 + TPS65912_DCDC1_OP;
 223         } else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
 224                 reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
 225         } else {
 226                 return -EINVAL;
 227         }
 228
 229         return reg;
 230 }
 231
 232 static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
 233 {
 234         switch (id) {
 235         case TPS65912_REG_DCDC1:
 236                 pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
 237                 pmic->eco_reg = TPS65912_DCDC1_AVS;
 238                 break;
 239         case TPS65912_REG_DCDC2:
 240                 pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
 241                 pmic->eco_reg = TPS65912_DCDC2_AVS;
 242                 break;
 243         case TPS65912_REG_DCDC3:
 244                 pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
 245                 pmic->eco_reg = TPS65912_DCDC3_AVS;
 246                 break;
 247         case TPS65912_REG_DCDC4:
 248                 pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
 249                 pmic->eco_reg = TPS65912_DCDC4_AVS;
 250                 break;
 251         default:
 252                 return -EINVAL;
 253         }
 254
 255         return 0;
 256 }
 257
 258 static int tps65912_reg_is_enabled(struct regulator_dev *dev)
 259 {
 260         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 261         struct tps65912 *mfd = pmic->mfd;
 262         int reg, value, id = rdev_get_id(dev);
 263
 264         if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
 265                 return -EINVAL;
 266
 267         reg = pmic->get_ctrl_reg(id);
 268         if (reg < 0)
 269                 return reg;
 270
 271         value = tps65912_reg_read(mfd, reg);
 272         if (value < 0)
 273                 return value;
 274
 275         return value & TPS65912_REG_ENABLED;
 276 }
 277
 278 static int tps65912_reg_enable(struct regulator_dev *dev)
 279 {
 280         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 281         struct tps65912 *mfd = pmic->mfd;
 282         int id = rdev_get_id(dev);
 283         int reg;
 284
 285         if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
 286                 return -EINVAL;
 287
 288         reg = pmic->get_ctrl_reg(id);
 289         if (reg < 0)
 290                 return reg;
 291
 292         return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
 293 }
 294
 295 static int tps65912_reg_disable(struct regulator_dev *dev)
 296 {
 297         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 298         struct tps65912 *mfd = pmic->mfd;
 299         int id = rdev_get_id(dev), reg;
 300
 301         reg = pmic->get_ctrl_reg(id);
 302         if (reg < 0)
 303                 return reg;
 304
 305         return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
 306 }
 307
 308 static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
 309 {
 310         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 311         struct tps65912 *mfd = pmic->mfd;
 312         int pwm_mode, eco, id = rdev_get_id(dev);
 313
 314         tps65912_get_mode_regiters(pmic, id);
 315
 316         pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
 317         eco = tps65912_reg_read(mfd, pmic->eco_reg);
 318
 319         pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
 320         eco &= DCDC_AVS_ECO_MASK;
 321
 322         switch (mode) {
 323         case REGULATOR_MODE_FAST:
 324                 /* Verify if mode alredy set */
 325                 if (pwm_mode && !eco)
 326                         break;
 327                 tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
 328                 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
 329                 break;
 330         case REGULATOR_MODE_NORMAL:
 331         case REGULATOR_MODE_IDLE:
 332                 if (!pwm_mode && !eco)
 333                         break;
 334                 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
 335                 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
 336                 break;
 337         case REGULATOR_MODE_STANDBY:
 338                 if (!pwm_mode && eco)
 339                         break;
 340                 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
 341                 tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
 342                 break;
 343         default:
 344                 return -EINVAL;
 345         }
 346
 347         return 0;
 348 }
 349
 350 static unsigned int tps65912_get_mode(struct regulator_dev *dev)
 351 {
 352         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 353         struct tps65912 *mfd = pmic->mfd;
 354         int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
 355
 356         tps65912_get_mode_regiters(pmic, id);
 357
 358         pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
 359         eco = tps65912_reg_read(mfd, pmic->eco_reg);
 360
 361         pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
 362         eco &= DCDC_AVS_ECO_MASK;
 363
 364         if (pwm_mode && !eco)
 365                 mode = REGULATOR_MODE_FAST;
 366         else if (!pwm_mode && !eco)
 367                 mode = REGULATOR_MODE_NORMAL;
 368         else if (!pwm_mode && eco)
 369                 mode = REGULATOR_MODE_STANDBY;
 370
 371         return mode;
 372 }
 373
 374 static int tps65912_list_voltage(struct regulator_dev *dev, unsigned selector)
 375 {
 376         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 377         int range, voltage = 0, id = rdev_get_id(dev);
 378
 379         if (id >= TPS65912_REG_LDO1 && id <= TPS65912_REG_LDO10)
 380                 return tps65912_vsel_to_uv_ldo(selector);
 381
 382         if (id > TPS65912_REG_DCDC4)
 383                 return -EINVAL;
 384
 385         range = pmic->dcdc_range[id];
 386
 387         switch (range) {
 388         case 0:
 389                 /* 0.5 - 1.2875V in 12.5mV steps */
 390                 voltage = tps65912_vsel_to_uv_range0(selector);
 391                 break;
 392         case 1:
 393                 /* 0.7 - 1.4875V in 12.5mV steps */
 394                 voltage = tps65912_vsel_to_uv_range1(selector);
 395                 break;
 396         case 2:
 397                 /* 0.5 - 2.075V in 25mV steps */
 398                 voltage = tps65912_vsel_to_uv_range2(selector);
 399                 break;
 400         case 3:
 401                 /* 0.5 - 3.8V in 50mV steps */
 402                 voltage = tps65912_vsel_to_uv_range3(selector);
 403                 break;
 404         }
 405         return voltage;
 406 }
 407
 408 static int tps65912_get_voltage_sel(struct regulator_dev *dev)
 409 {
 410         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 411         struct tps65912 *mfd = pmic->mfd;
 412         int id = rdev_get_id(dev);
 413         int reg, vsel;
 414
 415         reg = tps65912_get_sel_register(pmic, id);
 416         if (reg < 0)
 417                 return reg;
 418
 419         vsel = tps65912_reg_read(mfd, reg);
 420         vsel &= 0x3F;
 421
 422         return vsel;
 423 }
 424
 425 static int tps65912_set_voltage_sel(struct regulator_dev *dev,
 426                                          unsigned selector)
 427 {
 428         struct tps65912_reg *pmic = rdev_get_drvdata(dev);
 429         struct tps65912 *mfd = pmic->mfd;
 430         int id = rdev_get_id(dev);
 431         int value;
 432         u8 reg;
 433
 434         reg = tps65912_get_sel_register(pmic, id);
 435         value = tps65912_reg_read(mfd, reg);
 436         value &= 0xC0;
 437         return tps65912_reg_write(mfd, reg, selector | value);
 438 }
 439
 440 /* Operations permitted on DCDCx */
 441 static struct regulator_ops tps65912_ops_dcdc = {
 442         .is_enabled = tps65912_reg_is_enabled,
 443         .enable = tps65912_reg_enable,
 444         .disable = tps65912_reg_disable,
 445         .set_mode = tps65912_set_mode,
 446         .get_mode = tps65912_get_mode,
 447         .get_voltage_sel = tps65912_get_voltage_sel,
 448         .set_voltage_sel = tps65912_set_voltage_sel,
 449         .list_voltage = tps65912_list_voltage,
 450 };
 451
 452 /* Operations permitted on LDOx */
 453 static struct regulator_ops tps65912_ops_ldo = {
 454         .is_enabled = tps65912_reg_is_enabled,
 455         .enable = tps65912_reg_enable,
 456         .disable = tps65912_reg_disable,
 457         .get_voltage_sel = tps65912_get_voltage_sel,
 458         .set_voltage_sel = tps65912_set_voltage_sel,
 459         .list_voltage = tps65912_list_voltage,
 460 };
 461
 462 static int tps65912_probe(struct platform_device *pdev)
 463 {
 464         struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
 465         struct regulator_config config = { };
 466         struct tps_info *info;
 467         struct regulator_init_data *reg_data;
 468         struct regulator_dev *rdev;
 469         struct tps65912_reg *pmic;
 470         struct tps65912_board *pmic_plat_data;
 471         int i, err;
 472
 473         pmic_plat_data = dev_get_platdata(tps65912->dev);
 474         if (!pmic_plat_data)
 475                 return -EINVAL;
 476
 477         reg_data = pmic_plat_data->tps65912_pmic_init_data;
 478
 479         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 480         if (!pmic)
 481                 return -ENOMEM;
 482
 483         mutex_init(&pmic->io_lock);
 484         pmic->mfd = tps65912;
 485         platform_set_drvdata(pdev, pmic);
 486
 487         pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
 488         info = tps65912_regs;
 489
 490         for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
 491                 int range = 0;
 492                 /* Register the regulators */
 493                 pmic->info[i] = info;
 494
 495                 pmic->desc[i].name = info->name;
 496                 pmic->desc[i].id = i;
 497                 pmic->desc[i].n_voltages = 64;
 498                 pmic->desc[i].ops = (i > TPS65912_REG_DCDC4 ?
 499                         &tps65912_ops_ldo : &tps65912_ops_dcdc);
 500                 pmic->desc[i].type = REGULATOR_VOLTAGE;
 501                 pmic->desc[i].owner = THIS_MODULE;
 502                 range = tps65912_get_range(pmic, i);
 503
 504                 config.dev = tps65912->dev;
 505                 config.init_data = reg_data;
 506                 config.driver_data = pmic;
 507
 508                 rdev = regulator_register(&pmic->desc[i], &config);
 509                 if (IS_ERR(rdev)) {
 510                         dev_err(tps65912->dev,
 511                                 "failed to register %s regulator\n",
 512                                 pdev->name);
 513                         err = PTR_ERR(rdev);
 514                         goto err;
 515                 }
 516
 517                 /* Save regulator for cleanup */
 518                 pmic->rdev[i] = rdev;
 519         }
 520         return 0;
 521
 522 err:
 523         while (--i >= 0)
 524                 regulator_unregister(pmic->rdev[i]);
 525         return err;
 526 }
 527
 528 static int tps65912_remove(struct platform_device *pdev)
 529 {
 530         struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev);
 531         int i;
 532
 533         for (i = 0; i < TPS65912_NUM_REGULATOR; i++)
 534                 regulator_unregister(tps65912_reg->rdev[i]);
 535         return 0;
 536 }
 537
 538 static struct platform_driver tps65912_driver = {
 539         .driver = {
 540                 .name = "tps65912-pmic",
 541                 .owner = THIS_MODULE,
 542         },
 543         .probe = tps65912_probe,
 544         .remove = tps65912_remove,
 545 };
 546
 547 static int __init tps65912_init(void)
 548 {
 549         return platform_driver_register(&tps65912_driver);
 550 }
 551 subsys_initcall(tps65912_init);
 552
 553 static void __exit tps65912_cleanup(void)
 554 {
 555         platform_driver_unregister(&tps65912_driver);
 556 }
 557 module_exit(tps65912_cleanup);
 558
 559 MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
 560 MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
 561 MODULE_LICENSE("GPL v2");
 562 MODULE_ALIAS("platform:tps65912-pmic");