drivers/regulator/palmas-regulator.c

   1 /*
   2  * Driver for Regulator part of Palmas PMIC Chips
   3  *
   4  * Copyright 2011-2012 Texas Instruments Inc.
   5  *
   6  * Author: Graeme Gregory <gg@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  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/err.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regulator/driver.h>
  21 #include <linux/regulator/machine.h>
  22 #include <linux/slab.h>
  23 #include <linux/regmap.h>
  24 #include <linux/mfd/palmas.h>
  25 #include <linux/of.h>
  26 #include <linux/of_platform.h>
  27 #include <linux/regulator/of_regulator.h>
  28
  29 struct regs_info {
  30         char    *name;
  31         u8      vsel_addr;
  32         u8      ctrl_addr;
  33         u8      tstep_addr;
  34 };
  35
  36 static const struct regs_info palmas_regs_info[] = {
  37         {
  38                 .name           = "SMPS12",
  39                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  40                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
  41                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
  42         },
  43         {
  44                 .name           = "SMPS123",
  45                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  46                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
  47                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
  48         },
  49         {
  50                 .name           = "SMPS3",
  51                 .vsel_addr      = PALMAS_SMPS3_VOLTAGE,
  52                 .ctrl_addr      = PALMAS_SMPS3_CTRL,
  53         },
  54         {
  55                 .name           = "SMPS45",
  56                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  57                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
  58                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
  59         },
  60         {
  61                 .name           = "SMPS457",
  62                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  63                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
  64                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
  65         },
  66         {
  67                 .name           = "SMPS6",
  68                 .vsel_addr      = PALMAS_SMPS6_VOLTAGE,
  69                 .ctrl_addr      = PALMAS_SMPS6_CTRL,
  70                 .tstep_addr     = PALMAS_SMPS6_TSTEP,
  71         },
  72         {
  73                 .name           = "SMPS7",
  74                 .vsel_addr      = PALMAS_SMPS7_VOLTAGE,
  75                 .ctrl_addr      = PALMAS_SMPS7_CTRL,
  76         },
  77         {
  78                 .name           = "SMPS8",
  79                 .vsel_addr      = PALMAS_SMPS8_VOLTAGE,
  80                 .ctrl_addr      = PALMAS_SMPS8_CTRL,
  81                 .tstep_addr     = PALMAS_SMPS8_TSTEP,
  82         },
  83         {
  84                 .name           = "SMPS9",
  85                 .vsel_addr      = PALMAS_SMPS9_VOLTAGE,
  86                 .ctrl_addr      = PALMAS_SMPS9_CTRL,
  87         },
  88         {
  89                 .name           = "SMPS10",
  90         },
  91         {
  92                 .name           = "LDO1",
  93                 .vsel_addr      = PALMAS_LDO1_VOLTAGE,
  94                 .ctrl_addr      = PALMAS_LDO1_CTRL,
  95         },
  96         {
  97                 .name           = "LDO2",
  98                 .vsel_addr      = PALMAS_LDO2_VOLTAGE,
  99                 .ctrl_addr      = PALMAS_LDO2_CTRL,
 100         },
 101         {
 102                 .name           = "LDO3",
 103                 .vsel_addr      = PALMAS_LDO3_VOLTAGE,
 104                 .ctrl_addr      = PALMAS_LDO3_CTRL,
 105         },
 106         {
 107                 .name           = "LDO4",
 108                 .vsel_addr      = PALMAS_LDO4_VOLTAGE,
 109                 .ctrl_addr      = PALMAS_LDO4_CTRL,
 110         },
 111         {
 112                 .name           = "LDO5",
 113                 .vsel_addr      = PALMAS_LDO5_VOLTAGE,
 114                 .ctrl_addr      = PALMAS_LDO5_CTRL,
 115         },
 116         {
 117                 .name           = "LDO6",
 118                 .vsel_addr      = PALMAS_LDO6_VOLTAGE,
 119                 .ctrl_addr      = PALMAS_LDO6_CTRL,
 120         },
 121         {
 122                 .name           = "LDO7",
 123                 .vsel_addr      = PALMAS_LDO7_VOLTAGE,
 124                 .ctrl_addr      = PALMAS_LDO7_CTRL,
 125         },
 126         {
 127                 .name           = "LDO8",
 128                 .vsel_addr      = PALMAS_LDO8_VOLTAGE,
 129                 .ctrl_addr      = PALMAS_LDO8_CTRL,
 130         },
 131         {
 132                 .name           = "LDO9",
 133                 .vsel_addr      = PALMAS_LDO9_VOLTAGE,
 134                 .ctrl_addr      = PALMAS_LDO9_CTRL,
 135         },
 136         {
 137                 .name           = "LDOLN",
 138                 .vsel_addr      = PALMAS_LDOLN_VOLTAGE,
 139                 .ctrl_addr      = PALMAS_LDOLN_CTRL,
 140         },
 141         {
 142                 .name           = "LDOUSB",
 143                 .vsel_addr      = PALMAS_LDOUSB_VOLTAGE,
 144                 .ctrl_addr      = PALMAS_LDOUSB_CTRL,
 145         },
 146 };
 147
 148 #define SMPS_CTRL_MODE_OFF              0x00
 149 #define SMPS_CTRL_MODE_ON               0x01
 150 #define SMPS_CTRL_MODE_ECO              0x02
 151 #define SMPS_CTRL_MODE_PWM              0x03
 152
 153 /* These values are derived from the data sheet. And are the number of steps
 154  * where there is a voltage change, the ranges at beginning and end of register
 155  * max/min values where there are no change are ommitted.
 156  *
 157  * So they are basically (maxV-minV)/stepV
 158  */
 159 #define PALMAS_SMPS_NUM_VOLTAGES        116
 160 #define PALMAS_SMPS10_NUM_VOLTAGES      2
 161 #define PALMAS_LDO_NUM_VOLTAGES         50
 162
 163 #define SMPS10_VSEL                     (1<<3)
 164 #define SMPS10_BOOST_EN                 (1<<2)
 165 #define SMPS10_BYPASS_EN                (1<<1)
 166 #define SMPS10_SWITCH_EN                (1<<0)
 167
 168 #define REGULATOR_SLAVE                 0
 169
 170 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
 171                 unsigned int *dest)
 172 {
 173         unsigned int addr;
 174
 175         addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 176
 177         return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 178 }
 179
 180 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
 181                 unsigned int value)
 182 {
 183         unsigned int addr;
 184
 185         addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 186
 187         return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 188 }
 189
 190 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
 191                 unsigned int *dest)
 192 {
 193         unsigned int addr;
 194
 195         addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 196
 197         return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 198 }
 199
 200 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
 201                 unsigned int value)
 202 {
 203         unsigned int addr;
 204
 205         addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 206
 207         return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 208 }
 209
 210 static int palmas_is_enabled_smps(struct regulator_dev *dev)
 211 {
 212         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 213         int id = rdev_get_id(dev);
 214         unsigned int reg;
 215
 216         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 217
 218         reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
 219         reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
 220
 221         return !!(reg);
 222 }
 223
 224 static int palmas_enable_smps(struct regulator_dev *dev)
 225 {
 226         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 227         int id = rdev_get_id(dev);
 228         unsigned int reg;
 229
 230         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 231
 232         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 233         reg |= SMPS_CTRL_MODE_ON;
 234
 235         palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 236
 237         return 0;
 238 }
 239
 240 static int palmas_disable_smps(struct regulator_dev *dev)
 241 {
 242         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 243         int id = rdev_get_id(dev);
 244         unsigned int reg;
 245
 246         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 247
 248         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 249
 250         palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 251
 252         return 0;
 253 }
 254
 255
 256 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 257 {
 258         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 259         int id = rdev_get_id(dev);
 260         unsigned int reg;
 261
 262         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 263         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 264
 265         switch (mode) {
 266         case REGULATOR_MODE_NORMAL:
 267                 reg |= SMPS_CTRL_MODE_ON;
 268                 break;
 269         case REGULATOR_MODE_IDLE:
 270                 reg |= SMPS_CTRL_MODE_ECO;
 271                 break;
 272         case REGULATOR_MODE_FAST:
 273                 reg |= SMPS_CTRL_MODE_PWM;
 274                 break;
 275         default:
 276                 return -EINVAL;
 277         }
 278         palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 279
 280         return 0;
 281 }
 282
 283 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
 284 {
 285         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 286         int id = rdev_get_id(dev);
 287         unsigned int reg;
 288
 289         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 290         reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
 291         reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
 292
 293         switch (reg) {
 294         case SMPS_CTRL_MODE_ON:
 295                 return REGULATOR_MODE_NORMAL;
 296         case SMPS_CTRL_MODE_ECO:
 297                 return REGULATOR_MODE_IDLE;
 298         case SMPS_CTRL_MODE_PWM:
 299                 return REGULATOR_MODE_FAST;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static int palmas_list_voltage_smps(struct regulator_dev *dev,
 306                                         unsigned selector)
 307 {
 308         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 309         int id = rdev_get_id(dev);
 310         int mult = 1;
 311
 312         /* Read the multiplier set in VSEL register to return
 313          * the correct voltage.
 314          */
 315         if (pmic->range[id])
 316                 mult = 2;
 317
 318         if (selector == 0)
 319                 return 0;
 320         else if (selector < 6)
 321                 return 500000 * mult;
 322         else
 323                 /* Voltage is linear mapping starting from selector 6,
 324                  * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
 325                  * RANGE is either x1 or x2
 326                  */
 327                 return (490000 + ((selector - 5) * 10000)) * mult;
 328 }
 329
 330 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
 331                 int min_uV, int max_uV)
 332 {
 333         struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 334         int id = rdev_get_id(rdev);
 335         int ret, voltage;
 336
 337         if (min_uV == 0)
 338                 return 0;
 339
 340         if (pmic->range[id]) { /* RANGE is x2 */
 341                 if (min_uV < 1000000)
 342                         min_uV = 1000000;
 343                 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
 344         } else {                /* RANGE is x1 */
 345                 if (min_uV < 500000)
 346                         min_uV = 500000;
 347                 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
 348         }
 349
 350         /* Map back into a voltage to verify we're still in bounds */
 351         voltage = palmas_list_voltage_smps(rdev, ret);
 352         if (voltage < min_uV || voltage > max_uV)
 353                 return -EINVAL;
 354
 355         return ret;
 356 }
 357
 358 static struct regulator_ops palmas_ops_smps = {
 359         .is_enabled             = palmas_is_enabled_smps,
 360         .enable                 = palmas_enable_smps,
 361         .disable                = palmas_disable_smps,
 362         .set_mode               = palmas_set_mode_smps,
 363         .get_mode               = palmas_get_mode_smps,
 364         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 365         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 366         .list_voltage           = palmas_list_voltage_smps,
 367         .map_voltage            = palmas_map_voltage_smps,
 368 };
 369
 370 static struct regulator_ops palmas_ops_smps10 = {
 371         .is_enabled             = regulator_is_enabled_regmap,
 372         .enable                 = regulator_enable_regmap,
 373         .disable                = regulator_disable_regmap,
 374         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 375         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 376         .list_voltage           = regulator_list_voltage_linear,
 377         .map_voltage            = regulator_map_voltage_linear,
 378 };
 379
 380 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
 381 {
 382         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 383         int id = rdev_get_id(dev);
 384         unsigned int reg;
 385
 386         palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 387
 388         reg &= PALMAS_LDO1_CTRL_STATUS;
 389
 390         return !!(reg);
 391 }
 392
 393 static struct regulator_ops palmas_ops_ldo = {
 394         .is_enabled             = palmas_is_enabled_ldo,
 395         .enable                 = regulator_enable_regmap,
 396         .disable                = regulator_disable_regmap,
 397         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 398         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 399         .list_voltage           = regulator_list_voltage_linear,
 400         .map_voltage            = regulator_map_voltage_linear,
 401 };
 402
 403 /*
 404  * setup the hardware based sleep configuration of the SMPS/LDO regulators
 405  * from the platform data. This is different to the software based control
 406  * supported by the regulator framework as it is controlled by toggling
 407  * pins on the PMIC such as PREQ, SYSEN, ...
 408  */
 409 static int palmas_smps_init(struct palmas *palmas, int id,
 410                 struct palmas_reg_init *reg_init)
 411 {
 412         unsigned int reg;
 413         unsigned int addr;
 414         int ret;
 415
 416         addr = palmas_regs_info[id].ctrl_addr;
 417
 418         ret = palmas_smps_read(palmas, addr, &reg);
 419         if (ret)
 420                 return ret;
 421
 422         switch (id) {
 423         case PALMAS_REG_SMPS10:
 424                 if (reg_init->mode_sleep) {
 425                         reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
 426                         reg |= reg_init->mode_sleep <<
 427                                         PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
 428                 }
 429                 break;
 430         default:
 431                 if (reg_init->warm_reset)
 432                         reg |= PALMAS_SMPS12_CTRL_WR_S;
 433
 434                 if (reg_init->roof_floor)
 435                         reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 436
 437                 if (reg_init->mode_sleep) {
 438                         reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
 439                         reg |= reg_init->mode_sleep <<
 440                                         PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
 441                 }
 442         }
 443
 444         ret = palmas_smps_write(palmas, addr, reg);
 445         if (ret)
 446                 return ret;
 447
 448         if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
 449                 addr = palmas_regs_info[id].tstep_addr;
 450
 451                 reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;
 452
 453                 ret = palmas_smps_write(palmas, addr, reg);
 454                 if (ret)
 455                         return ret;
 456         }
 457
 458         if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
 459                 addr = palmas_regs_info[id].vsel_addr;
 460
 461                 reg = reg_init->vsel;
 462
 463                 ret = palmas_smps_write(palmas, addr, reg);
 464                 if (ret)
 465                         return ret;
 466         }
 467
 468
 469         return 0;
 470 }
 471
 472 static int palmas_ldo_init(struct palmas *palmas, int id,
 473                 struct palmas_reg_init *reg_init)
 474 {
 475         unsigned int reg;
 476         unsigned int addr;
 477         int ret;
 478
 479         addr = palmas_regs_info[id].ctrl_addr;
 480
 481         ret = palmas_ldo_read(palmas, addr, &reg);
 482         if (ret)
 483                 return ret;
 484
 485         if (reg_init->warm_reset)
 486                 reg |= PALMAS_LDO1_CTRL_WR_S;
 487
 488         if (reg_init->mode_sleep)
 489                 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
 490
 491         ret = palmas_ldo_write(palmas, addr, reg);
 492         if (ret)
 493                 return ret;
 494
 495         return 0;
 496 }
 497
 498 static struct of_regulator_match palmas_matches[] = {
 499         { .name = "smps12", },
 500         { .name = "smps123", },
 501         { .name = "smps3", },
 502         { .name = "smps45", },
 503         { .name = "smps457", },
 504         { .name = "smps6", },
 505         { .name = "smps7", },
 506         { .name = "smps8", },
 507         { .name = "smps9", },
 508         { .name = "smps10", },
 509         { .name = "ldo1", },
 510         { .name = "ldo2", },
 511         { .name = "ldo3", },
 512         { .name = "ldo4", },
 513         { .name = "ldo5", },
 514         { .name = "ldo6", },
 515         { .name = "ldo7", },
 516         { .name = "ldo8", },
 517         { .name = "ldo9", },
 518         { .name = "ldoln", },
 519         { .name = "ldousb", },
 520 };
 521
 522 static void palmas_dt_to_pdata(struct device *dev,
 523                 struct device_node *node,
 524                 struct palmas_pmic_platform_data *pdata)
 525 {
 526         struct device_node *regulators;
 527         u32 prop;
 528         int idx, ret;
 529
 530         node = of_node_get(node);
 531         regulators = of_find_node_by_name(node, "regulators");
 532         if (!regulators) {
 533                 dev_info(dev, "regulator node not found\n");
 534                 return;
 535         }
 536
 537         ret = of_regulator_match(dev, regulators, palmas_matches,
 538                         PALMAS_NUM_REGS);
 539         of_node_put(regulators);
 540         if (ret < 0) {
 541                 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
 542                 return;
 543         }
 544
 545         for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
 546                 if (!palmas_matches[idx].init_data ||
 547                                 !palmas_matches[idx].of_node)
 548                         continue;
 549
 550                 pdata->reg_data[idx] = palmas_matches[idx].init_data;
 551
 552                 pdata->reg_init[idx] = devm_kzalloc(dev,
 553                                 sizeof(struct palmas_reg_init), GFP_KERNEL);
 554
 555                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 556                                 "ti,warm_reset", &prop);
 557                 if (!ret)
 558                         pdata->reg_init[idx]->warm_reset = prop;
 559
 560                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 561                                 "ti,roof_floor", &prop);
 562                 if (!ret)
 563                         pdata->reg_init[idx]->roof_floor = prop;
 564
 565                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 566                                 "ti,mode_sleep", &prop);
 567                 if (!ret)
 568                         pdata->reg_init[idx]->mode_sleep = prop;
 569
 570                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 571                                 "ti,tstep", &prop);
 572                 if (!ret)
 573                         pdata->reg_init[idx]->tstep = prop;
 574
 575                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 576                                 "ti,vsel", &prop);
 577                 if (!ret)
 578                         pdata->reg_init[idx]->vsel = prop;
 579         }
 580
 581         ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
 582         if (!ret)
 583                 pdata->ldo6_vibrator = prop;
 584 }
 585
 586
 587 static int palmas_probe(struct platform_device *pdev)
 588 {
 589         struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
 590         struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
 591         struct device_node *node = pdev->dev.of_node;
 592         struct regulator_dev *rdev;
 593         struct regulator_config config = { };
 594         struct palmas_pmic *pmic;
 595         struct palmas_reg_init *reg_init;
 596         int id = 0, ret;
 597         unsigned int addr, reg;
 598
 599         if (node && !pdata) {
 600                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 601
 602                 if (!pdata)
 603                         return -ENOMEM;
 604
 605                 palmas_dt_to_pdata(&pdev->dev, node, pdata);
 606         }
 607
 608         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 609         if (!pmic)
 610                 return -ENOMEM;
 611
 612         pmic->dev = &pdev->dev;
 613         pmic->palmas = palmas;
 614         palmas->pmic = pmic;
 615         platform_set_drvdata(pdev, pmic);
 616
 617         ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
 618         if (ret)
 619                 return ret;
 620
 621         if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
 622                 pmic->smps123 = 1;
 623
 624         if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
 625                 pmic->smps457 = 1;
 626
 627         config.regmap = palmas->regmap[REGULATOR_SLAVE];
 628         config.dev = &pdev->dev;
 629         config.driver_data = pmic;
 630
 631         for (id = 0; id < PALMAS_REG_LDO1; id++) {
 632
 633                 /*
 634                  * Miss out regulators which are not available due
 635                  * to slaving configurations.
 636                  */
 637                 switch (id) {
 638                 case PALMAS_REG_SMPS12:
 639                 case PALMAS_REG_SMPS3:
 640                         if (pmic->smps123)
 641                                 continue;
 642                         break;
 643                 case PALMAS_REG_SMPS123:
 644                         if (!pmic->smps123)
 645                                 continue;
 646                         break;
 647                 case PALMAS_REG_SMPS45:
 648                 case PALMAS_REG_SMPS7:
 649                         if (pmic->smps457)
 650                                 continue;
 651                         break;
 652                 case PALMAS_REG_SMPS457:
 653                         if (!pmic->smps457)
 654                                 continue;
 655                 }
 656
 657                 /* Initialise sleep/init values from platform data */
 658                 if (pdata && pdata->reg_init[id]) {
 659                         reg_init = pdata->reg_init[id];
 660                         ret = palmas_smps_init(palmas, id, reg_init);
 661                         if (ret)
 662                                 goto err_unregister_regulator;
 663                 }
 664
 665                 /* Register the regulators */
 666                 pmic->desc[id].name = palmas_regs_info[id].name;
 667                 pmic->desc[id].id = id;
 668
 669                 switch (id) {
 670                 case PALMAS_REG_SMPS10:
 671                         pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
 672                         pmic->desc[id].ops = &palmas_ops_smps10;
 673                         pmic->desc[id].vsel_reg =
 674                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 675                                                         PALMAS_SMPS10_CTRL);
 676                         pmic->desc[id].vsel_mask = SMPS10_VSEL;
 677                         pmic->desc[id].enable_reg =
 678                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 679                                                         PALMAS_SMPS10_STATUS);
 680                         pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
 681                         pmic->desc[id].min_uV = 3750000;
 682                         pmic->desc[id].uV_step = 1250000;
 683                         break;
 684                 default:
 685                         /*
 686                          * Read and store the RANGE bit for later use
 687                          * This must be done before regulator is probed,
 688                          * otherwise we error in probe with unsupportable ranges.
 689                          */
 690                         addr = palmas_regs_info[id].vsel_addr;
 691
 692                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 693                         if (ret)
 694                                 goto err_unregister_regulator;
 695                         if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
 696                                 pmic->range[id] = 1;
 697
 698                         pmic->desc[id].ops = &palmas_ops_smps;
 699                         pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
 700                         pmic->desc[id].vsel_reg =
 701                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 702                                                 palmas_regs_info[id].vsel_addr);
 703                         pmic->desc[id].vsel_mask =
 704                                         PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
 705                 }
 706
 707                 pmic->desc[id].type = REGULATOR_VOLTAGE;
 708                 pmic->desc[id].owner = THIS_MODULE;
 709
 710                 if (pdata)
 711                         config.init_data = pdata->reg_data[id];
 712                 else
 713                         config.init_data = NULL;
 714
 715                 config.of_node = palmas_matches[id].of_node;
 716
 717                 rdev = regulator_register(&pmic->desc[id], &config);
 718                 if (IS_ERR(rdev)) {
 719                         dev_err(&pdev->dev,
 720                                 "failed to register %s regulator\n",
 721                                 pdev->name);
 722                         ret = PTR_ERR(rdev);
 723                         goto err_unregister_regulator;
 724                 }
 725
 726                 /* Save regulator for cleanup */
 727                 pmic->rdev[id] = rdev;
 728         }
 729
 730         /* Start this loop from the id left from previous loop */
 731         for (; id < PALMAS_NUM_REGS; id++) {
 732
 733                 /* Miss out regulators which are not available due
 734                  * to alternate functions.
 735                  */
 736
 737                 /* Register the regulators */
 738                 pmic->desc[id].name = palmas_regs_info[id].name;
 739                 pmic->desc[id].id = id;
 740                 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
 741
 742                 pmic->desc[id].ops = &palmas_ops_ldo;
 743
 744                 pmic->desc[id].type = REGULATOR_VOLTAGE;
 745                 pmic->desc[id].owner = THIS_MODULE;
 746                 pmic->desc[id].min_uV = 900000;
 747                 pmic->desc[id].uV_step = 50000;
 748                 pmic->desc[id].linear_min_sel = 1;
 749                 pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 750                                                 palmas_regs_info[id].vsel_addr);
 751                 pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
 752                 pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 753                                                 palmas_regs_info[id].ctrl_addr);
 754                 pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
 755
 756                 if (pdata)
 757                         config.init_data = pdata->reg_data[id];
 758                 else
 759                         config.init_data = NULL;
 760
 761                 config.of_node = palmas_matches[id].of_node;
 762
 763                 rdev = regulator_register(&pmic->desc[id], &config);
 764                 if (IS_ERR(rdev)) {
 765                         dev_err(&pdev->dev,
 766                                 "failed to register %s regulator\n",
 767                                 pdev->name);
 768                         ret = PTR_ERR(rdev);
 769                         goto err_unregister_regulator;
 770                 }
 771
 772                 /* Save regulator for cleanup */
 773                 pmic->rdev[id] = rdev;
 774
 775                 /* Initialise sleep/init values from platform data */
 776                 if (pdata) {
 777                         reg_init = pdata->reg_init[id];
 778                         if (reg_init) {
 779                                 ret = palmas_ldo_init(palmas, id, reg_init);
 780                                 if (ret) {
 781                                         regulator_unregister(pmic->rdev[id]);
 782                                         goto err_unregister_regulator;
 783                                 }
 784                         }
 785                 }
 786         }
 787
 788         return 0;
 789
 790 err_unregister_regulator:
 791         while (--id >= 0)
 792                 regulator_unregister(pmic->rdev[id]);
 793         return ret;
 794 }
 795
 796 static int palmas_remove(struct platform_device *pdev)
 797 {
 798         struct palmas_pmic *pmic = platform_get_drvdata(pdev);
 799         int id;
 800
 801         for (id = 0; id < PALMAS_NUM_REGS; id++)
 802                 regulator_unregister(pmic->rdev[id]);
 803         return 0;
 804 }
 805
 806 static struct of_device_id of_palmas_match_tbl[] = {
 807         { .compatible = "ti,palmas-pmic", },
 808         { /* end */ }
 809 };
 810
 811 static struct platform_driver palmas_driver = {
 812         .driver = {
 813                 .name = "palmas-pmic",
 814                 .of_match_table = of_palmas_match_tbl,
 815                 .owner = THIS_MODULE,
 816         },
 817         .probe = palmas_probe,
 818         .remove = palmas_remove,
 819 };
 820
 821 static int __init palmas_init(void)
 822 {
 823         return platform_driver_register(&palmas_driver);
 824 }
 825 subsys_initcall(palmas_init);
 826
 827 static void __exit palmas_exit(void)
 828 {
 829         platform_driver_unregister(&palmas_driver);
 830 }
 831 module_exit(palmas_exit);
 832
 833 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 834 MODULE_DESCRIPTION("Palmas voltage regulator driver");
 835 MODULE_LICENSE("GPL");
 836 MODULE_ALIAS("platform:palmas-pmic");
 837 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);