drivers/regulator/pv88080-regulator.c

   1 /*
   2  * pv88080-regulator.c - Regulator device driver for PV88080
   3  * Copyright (C) 2016  Powerventure Semiconductor Ltd.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/err.h>
  17 #include <linux/i2c.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/init.h>
  21 #include <linux/slab.h>
  22 #include <linux/regulator/driver.h>
  23 #include <linux/regulator/machine.h>
  24 #include <linux/regmap.h>
  25 #include <linux/irq.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/regulator/of_regulator.h>
  28 #include "pv88080-regulator.h"
  29
  30 #define PV88080_MAX_REGULATORS  4
  31
  32 /* PV88080 REGULATOR IDs */
  33 enum {
  34         /* BUCKs */
  35         PV88080_ID_BUCK1,
  36         PV88080_ID_BUCK2,
  37         PV88080_ID_BUCK3,
  38         PV88080_ID_HVBUCK,
  39 };
  40
  41 enum pv88080_types {
  42         TYPE_PV88080_AA,
  43         TYPE_PV88080_BA,
  44 };
  45
  46 struct pv88080_regulator {
  47         struct regulator_desc desc;
  48         /* Current limiting */
  49         unsigned int n_current_limits;
  50         const int *current_limits;
  51         unsigned int limit_mask;
  52         unsigned int mode_reg;
  53         unsigned int limit_reg;
  54         unsigned int conf2;
  55         unsigned int conf5;
  56 };
  57
  58 struct pv88080 {
  59         struct device *dev;
  60         struct regmap *regmap;
  61         struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
  62         unsigned long type;
  63         const struct pv88080_compatible_regmap *regmap_config;
  64 };
  65
  66 struct pv88080_buck_voltage {
  67         int min_uV;
  68         int max_uV;
  69         int uV_step;
  70 };
  71
  72 struct pv88080_buck_regmap {
  73         /* REGS */
  74         int buck_enable_reg;
  75         int buck_vsel_reg;
  76         int buck_mode_reg;
  77         int buck_limit_reg;
  78         int buck_vdac_range_reg;
  79         int buck_vrange_gain_reg;
  80         /* MASKS */
  81         int buck_enable_mask;
  82         int buck_vsel_mask;
  83         int buck_limit_mask;
  84 };
  85
  86 struct pv88080_compatible_regmap {
  87         /* BUCK1, 2, 3 */
  88         struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1];
  89         /* HVBUCK */
  90         int hvbuck_enable_reg;
  91         int hvbuck_vsel_reg;
  92         int hvbuck_enable_mask;
  93         int hvbuck_vsel_mask;
  94 };
  95
  96 static const struct regmap_config pv88080_regmap_config = {
  97         .reg_bits = 8,
  98         .val_bits = 8,
  99 };
 100
 101 /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
 102  * Entry indexes corresponds to register values.
 103  */
 104
 105 static const int pv88080_buck1_limits[] = {
 106         3230000, 5130000, 6960000, 8790000
 107 };
 108
 109 static const int pv88080_buck23_limits[] = {
 110         1496000, 2393000, 3291000, 4189000
 111 };
 112
 113 static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
 114         {
 115                 .min_uV = 600000,
 116                 .max_uV = 1393750,
 117                 .uV_step = 6250,
 118         },
 119         {
 120                 .min_uV = 1400000,
 121                 .max_uV = 2193750,
 122                 .uV_step = 6250,
 123         },
 124 };
 125
 126 static const struct pv88080_compatible_regmap pv88080_aa_regs = {
 127         /* BUCK1 */
 128         .buck_regmap[0] = {
 129                 .buck_enable_reg      = PV88080AA_REG_BUCK1_CONF0,
 130                 .buck_vsel_reg        = PV88080AA_REG_BUCK1_CONF0,
 131                 .buck_mode_reg        = PV88080AA_REG_BUCK1_CONF1,
 132                 .buck_limit_reg       = PV88080AA_REG_BUCK1_CONF1,
 133                 .buck_vdac_range_reg  = PV88080AA_REG_BUCK1_CONF2,
 134                 .buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5,
 135                 .buck_enable_mask     = PV88080_BUCK1_EN,
 136                 .buck_vsel_mask       = PV88080_VBUCK1_MASK,
 137                 .buck_limit_mask      = PV88080_BUCK1_ILIM_MASK,
 138         },
 139         /* BUCK2 */
 140         .buck_regmap[1] = {
 141                 .buck_enable_reg      = PV88080AA_REG_BUCK2_CONF0,
 142                 .buck_vsel_reg        = PV88080AA_REG_BUCK2_CONF0,
 143                 .buck_mode_reg        = PV88080AA_REG_BUCK2_CONF1,
 144                 .buck_limit_reg       = PV88080AA_REG_BUCK2_CONF1,
 145                 .buck_vdac_range_reg  = PV88080AA_REG_BUCK2_CONF2,
 146                 .buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5,
 147                 .buck_enable_mask         = PV88080_BUCK2_EN,
 148                 .buck_vsel_mask       = PV88080_VBUCK2_MASK,
 149                 .buck_limit_mask      = PV88080_BUCK2_ILIM_MASK,
 150         },
 151         /* BUCK3 */
 152         .buck_regmap[2] = {
 153                 .buck_enable_reg          = PV88080AA_REG_BUCK3_CONF0,
 154                 .buck_vsel_reg        = PV88080AA_REG_BUCK3_CONF0,
 155                 .buck_mode_reg        = PV88080AA_REG_BUCK3_CONF1,
 156                 .buck_limit_reg       = PV88080AA_REG_BUCK3_CONF1,
 157                 .buck_vdac_range_reg  = PV88080AA_REG_BUCK3_CONF2,
 158                 .buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5,
 159                 .buck_enable_mask         = PV88080_BUCK3_EN,
 160                 .buck_vsel_mask       = PV88080_VBUCK3_MASK,
 161                 .buck_limit_mask      = PV88080_BUCK3_ILIM_MASK,
 162         },
 163         /* HVBUCK */
 164         .hvbuck_enable_reg            = PV88080AA_REG_HVBUCK_CONF2,
 165         .hvbuck_vsel_reg          = PV88080AA_REG_HVBUCK_CONF1,
 166         .hvbuck_enable_mask       = PV88080_HVBUCK_EN,
 167         .hvbuck_vsel_mask         = PV88080_VHVBUCK_MASK,
 168 };
 169
 170 static const struct pv88080_compatible_regmap pv88080_ba_regs = {
 171         /* BUCK1 */
 172         .buck_regmap[0] = {
 173                 .buck_enable_reg          = PV88080BA_REG_BUCK1_CONF0,
 174                 .buck_vsel_reg        = PV88080BA_REG_BUCK1_CONF0,
 175                 .buck_mode_reg        = PV88080BA_REG_BUCK1_CONF1,
 176                 .buck_limit_reg       = PV88080BA_REG_BUCK1_CONF1,
 177                 .buck_vdac_range_reg  = PV88080BA_REG_BUCK1_CONF2,
 178                 .buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5,
 179                 .buck_enable_mask     = PV88080_BUCK1_EN,
 180                 .buck_vsel_mask       = PV88080_VBUCK1_MASK,
 181                 .buck_limit_mask          = PV88080_BUCK1_ILIM_MASK,
 182         },
 183         /* BUCK2 */
 184         .buck_regmap[1] = {
 185                 .buck_enable_reg          = PV88080BA_REG_BUCK2_CONF0,
 186                 .buck_vsel_reg        = PV88080BA_REG_BUCK2_CONF0,
 187                 .buck_mode_reg        = PV88080BA_REG_BUCK2_CONF1,
 188                 .buck_limit_reg       = PV88080BA_REG_BUCK2_CONF1,
 189                 .buck_vdac_range_reg  = PV88080BA_REG_BUCK2_CONF2,
 190                 .buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5,
 191                 .buck_enable_mask         = PV88080_BUCK2_EN,
 192                 .buck_vsel_mask       = PV88080_VBUCK2_MASK,
 193                 .buck_limit_mask          = PV88080_BUCK2_ILIM_MASK,
 194         },
 195         /* BUCK3 */
 196         .buck_regmap[2] = {
 197                 .buck_enable_reg          = PV88080BA_REG_BUCK3_CONF0,
 198                 .buck_vsel_reg        = PV88080BA_REG_BUCK3_CONF0,
 199                 .buck_mode_reg        = PV88080BA_REG_BUCK3_CONF1,
 200                 .buck_limit_reg       = PV88080BA_REG_BUCK3_CONF1,
 201                 .buck_vdac_range_reg  = PV88080BA_REG_BUCK3_CONF2,
 202                 .buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5,
 203                 .buck_enable_mask         = PV88080_BUCK3_EN,
 204                 .buck_vsel_mask       = PV88080_VBUCK3_MASK,
 205                 .buck_limit_mask          = PV88080_BUCK3_ILIM_MASK,
 206         },
 207         /* HVBUCK */
 208         .hvbuck_enable_reg            = PV88080BA_REG_HVBUCK_CONF2,
 209         .hvbuck_vsel_reg          = PV88080BA_REG_HVBUCK_CONF1,
 210         .hvbuck_enable_mask       = PV88080_HVBUCK_EN,
 211         .hvbuck_vsel_mask                 = PV88080_VHVBUCK_MASK,
 212 };
 213
 214 #ifdef CONFIG_OF
 215 static const struct of_device_id pv88080_dt_ids[] = {
 216         { .compatible = "pvs,pv88080",    .data = (void *)TYPE_PV88080_AA },
 217         { .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA },
 218         { .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA },
 219         {},
 220 };
 221 MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
 222 #endif
 223
 224 static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev)
 225 {
 226         struct pv88080_regulator *info = rdev_get_drvdata(rdev);
 227         unsigned int data;
 228         int ret, mode = 0;
 229
 230         ret = regmap_read(rdev->regmap, info->mode_reg, &data);
 231         if (ret < 0)
 232                 return ret;
 233
 234         switch (data & PV88080_BUCK1_MODE_MASK) {
 235         case PV88080_BUCK_MODE_SYNC:
 236                 mode = REGULATOR_MODE_FAST;
 237                 break;
 238         case PV88080_BUCK_MODE_AUTO:
 239                 mode = REGULATOR_MODE_NORMAL;
 240                 break;
 241         case PV88080_BUCK_MODE_SLEEP:
 242                 mode = REGULATOR_MODE_STANDBY;
 243                 break;
 244         default:
 245                 return -EINVAL;
 246         }
 247
 248         return mode;
 249 }
 250
 251 static int pv88080_buck_set_mode(struct regulator_dev *rdev,
 252                                         unsigned int mode)
 253 {
 254         struct pv88080_regulator *info = rdev_get_drvdata(rdev);
 255         int val = 0;
 256
 257         switch (mode) {
 258         case REGULATOR_MODE_FAST:
 259                 val = PV88080_BUCK_MODE_SYNC;
 260                 break;
 261         case REGULATOR_MODE_NORMAL:
 262                 val = PV88080_BUCK_MODE_AUTO;
 263                 break;
 264         case REGULATOR_MODE_STANDBY:
 265                 val = PV88080_BUCK_MODE_SLEEP;
 266                 break;
 267         default:
 268                 return -EINVAL;
 269         }
 270
 271         return regmap_update_bits(rdev->regmap, info->mode_reg,
 272                                         PV88080_BUCK1_MODE_MASK, val);
 273 }
 274
 275 static int pv88080_set_current_limit(struct regulator_dev *rdev, int min,
 276                                     int max)
 277 {
 278         struct pv88080_regulator *info = rdev_get_drvdata(rdev);
 279         int i;
 280
 281         /* search for closest to maximum */
 282         for (i = info->n_current_limits; i >= 0; i--) {
 283                 if (min <= info->current_limits[i]
 284                         && max >= info->current_limits[i]) {
 285                                 return regmap_update_bits(rdev->regmap,
 286                                         info->limit_reg,
 287                                         info->limit_mask,
 288                                         i << PV88080_BUCK1_ILIM_SHIFT);
 289                 }
 290         }
 291
 292         return -EINVAL;
 293 }
 294
 295 static int pv88080_get_current_limit(struct regulator_dev *rdev)
 296 {
 297         struct pv88080_regulator *info = rdev_get_drvdata(rdev);
 298         unsigned int data;
 299         int ret;
 300
 301         ret = regmap_read(rdev->regmap, info->limit_reg, &data);
 302         if (ret < 0)
 303                 return ret;
 304
 305         data = (data & info->limit_mask) >> PV88080_BUCK1_ILIM_SHIFT;
 306         return info->current_limits[data];
 307 }
 308
 309 static struct regulator_ops pv88080_buck_ops = {
 310         .get_mode = pv88080_buck_get_mode,
 311         .set_mode = pv88080_buck_set_mode,
 312         .enable = regulator_enable_regmap,
 313         .disable = regulator_disable_regmap,
 314         .is_enabled = regulator_is_enabled_regmap,
 315         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 316         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 317         .list_voltage = regulator_list_voltage_linear,
 318         .set_current_limit = pv88080_set_current_limit,
 319         .get_current_limit = pv88080_get_current_limit,
 320 };
 321
 322 static struct regulator_ops pv88080_hvbuck_ops = {
 323         .enable = regulator_enable_regmap,
 324         .disable = regulator_disable_regmap,
 325         .is_enabled = regulator_is_enabled_regmap,
 326         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 327         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 328         .list_voltage = regulator_list_voltage_linear,
 329 };
 330
 331 #define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \
 332 {\
 333         .desc   =       {\
 334                 .id = chip##_ID_##regl_name,\
 335                 .name = __stringify(chip##_##regl_name),\
 336                 .of_match = of_match_ptr(#regl_name),\
 337                 .regulators_node = of_match_ptr("regulators"),\
 338                 .type = REGULATOR_VOLTAGE,\
 339                 .owner = THIS_MODULE,\
 340                 .ops = &pv88080_buck_ops,\
 341                 .min_uV = min, \
 342                 .uV_step = step, \
 343                 .n_voltages = ((max) - (min))/(step) + 1, \
 344         },\
 345         .current_limits = limits_array, \
 346         .n_current_limits = ARRAY_SIZE(limits_array), \
 347 }
 348
 349 #define PV88080_HVBUCK(chip, regl_name, min, step, max) \
 350 {\
 351         .desc   =       {\
 352                 .id = chip##_ID_##regl_name,\
 353                 .name = __stringify(chip##_##regl_name),\
 354                 .of_match = of_match_ptr(#regl_name),\
 355                 .regulators_node = of_match_ptr("regulators"),\
 356                 .type = REGULATOR_VOLTAGE,\
 357                 .owner = THIS_MODULE,\
 358                 .ops = &pv88080_hvbuck_ops,\
 359                 .min_uV = min, \
 360                 .uV_step = step, \
 361                 .n_voltages = ((max) - (min))/(step) + 1, \
 362         },\
 363 }
 364
 365 static struct pv88080_regulator pv88080_regulator_info[] = {
 366         PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750,
 367                 pv88080_buck1_limits),
 368         PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750,
 369                 pv88080_buck23_limits),
 370         PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750,
 371                 pv88080_buck23_limits),
 372         PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000),
 373 };
 374
 375 static irqreturn_t pv88080_irq_handler(int irq, void *data)
 376 {
 377         struct pv88080 *chip = data;
 378         int i, reg_val, err, ret = IRQ_NONE;
 379
 380         err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, &reg_val);
 381         if (err < 0)
 382                 goto error_i2c;
 383
 384         if (reg_val & PV88080_E_VDD_FLT) {
 385                 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
 386                         if (chip->rdev[i] != NULL) {
 387                                 regulator_notifier_call_chain(chip->rdev[i],
 388                                         REGULATOR_EVENT_UNDER_VOLTAGE,
 389                                         NULL);
 390                         }
 391                 }
 392
 393                 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
 394                         PV88080_E_VDD_FLT);
 395                 if (err < 0)
 396                         goto error_i2c;
 397
 398                 ret = IRQ_HANDLED;
 399         }
 400
 401         if (reg_val & PV88080_E_OVER_TEMP) {
 402                 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
 403                         if (chip->rdev[i] != NULL) {
 404                                 regulator_notifier_call_chain(chip->rdev[i],
 405                                         REGULATOR_EVENT_OVER_TEMP,
 406                                         NULL);
 407                         }
 408                 }
 409
 410                 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
 411                         PV88080_E_OVER_TEMP);
 412                 if (err < 0)
 413                         goto error_i2c;
 414
 415                 ret = IRQ_HANDLED;
 416         }
 417
 418         return ret;
 419
 420 error_i2c:
 421         dev_err(chip->dev, "I2C error : %d\n", err);
 422         return IRQ_NONE;
 423 }
 424
 425 /*
 426  * I2C driver interface functions
 427  */
 428 static int pv88080_i2c_probe(struct i2c_client *i2c,
 429                 const struct i2c_device_id *id)
 430 {
 431         struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
 432         struct pv88080 *chip;
 433         const struct pv88080_compatible_regmap *regmap_config;
 434         const struct of_device_id *match;
 435         struct regulator_config config = { };
 436         int i, error, ret;
 437         unsigned int conf2, conf5;
 438
 439         chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL);
 440         if (!chip)
 441                 return -ENOMEM;
 442
 443         chip->dev = &i2c->dev;
 444         chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config);
 445         if (IS_ERR(chip->regmap)) {
 446                 error = PTR_ERR(chip->regmap);
 447                 dev_err(chip->dev, "Failed to allocate register map: %d\n",
 448                         error);
 449                 return error;
 450         }
 451
 452         if (i2c->dev.of_node) {
 453                 match = of_match_node(pv88080_dt_ids, i2c->dev.of_node);
 454                 if (!match) {
 455                         dev_err(chip->dev, "Failed to get of_match_node\n");
 456                         return -EINVAL;
 457                 }
 458                 chip->type = (unsigned long)match->data;
 459         } else {
 460                 chip->type = id->driver_data;
 461         }
 462
 463         i2c_set_clientdata(i2c, chip);
 464
 465         if (i2c->irq != 0) {
 466                 ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF);
 467                 if (ret < 0) {
 468                         dev_err(chip->dev,
 469                                 "Failed to mask A reg: %d\n", ret);
 470                         return ret;
 471                 }
 472                 ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF);
 473                 if (ret < 0) {
 474                         dev_err(chip->dev,
 475                                 "Failed to mask B reg: %d\n", ret);
 476                         return ret;
 477                 }
 478                 ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF);
 479                 if (ret < 0) {
 480                         dev_err(chip->dev,
 481                                 "Failed to mask C reg: %d\n", ret);
 482                         return ret;
 483                 }
 484
 485                 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
 486                                         pv88080_irq_handler,
 487                                         IRQF_TRIGGER_LOW|IRQF_ONESHOT,
 488                                         "pv88080", chip);
 489                 if (ret != 0) {
 490                         dev_err(chip->dev, "Failed to request IRQ: %d\n",
 491                                 i2c->irq);
 492                         return ret;
 493                 }
 494
 495                 ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A,
 496                         PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0);
 497                 if (ret < 0) {
 498                         dev_err(chip->dev,
 499                                 "Failed to update mask reg: %d\n", ret);
 500                         return ret;
 501                 }
 502         } else {
 503                 dev_warn(chip->dev, "No IRQ configured\n");
 504         }
 505
 506         switch (chip->type) {
 507         case TYPE_PV88080_AA:
 508                 chip->regmap_config = &pv88080_aa_regs;
 509                 break;
 510         case TYPE_PV88080_BA:
 511                 chip->regmap_config = &pv88080_ba_regs;
 512                 break;
 513         }
 514
 515         regmap_config = chip->regmap_config;
 516         config.dev = chip->dev;
 517         config.regmap = chip->regmap;
 518
 519         /* Registeration for BUCK1, 2, 3 */
 520         for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) {
 521                 if (init_data)
 522                         config.init_data = &init_data[i];
 523
 524                 pv88080_regulator_info[i].limit_reg
 525                         = regmap_config->buck_regmap[i].buck_limit_reg;
 526                 pv88080_regulator_info[i].limit_mask
 527                         = regmap_config->buck_regmap[i].buck_limit_mask;
 528                 pv88080_regulator_info[i].mode_reg
 529                         = regmap_config->buck_regmap[i].buck_mode_reg;
 530                 pv88080_regulator_info[i].conf2
 531                         = regmap_config->buck_regmap[i].buck_vdac_range_reg;
 532                 pv88080_regulator_info[i].conf5
 533                         = regmap_config->buck_regmap[i].buck_vrange_gain_reg;
 534                 pv88080_regulator_info[i].desc.enable_reg
 535                         = regmap_config->buck_regmap[i].buck_enable_reg;
 536                 pv88080_regulator_info[i].desc.enable_mask
 537                         = regmap_config->buck_regmap[i].buck_enable_mask;
 538                 pv88080_regulator_info[i].desc.vsel_reg
 539                         = regmap_config->buck_regmap[i].buck_vsel_reg;
 540                 pv88080_regulator_info[i].desc.vsel_mask
 541                         = regmap_config->buck_regmap[i].buck_vsel_mask;
 542
 543                 ret = regmap_read(chip->regmap,
 544                                 pv88080_regulator_info[i].conf2, &conf2);
 545                 if (ret < 0)
 546                         return ret;
 547                 conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) &
 548                         PV88080_BUCK_VDAC_RANGE_MASK);
 549
 550                 ret = regmap_read(chip->regmap,
 551                                 pv88080_regulator_info[i].conf5, &conf5);
 552                 if (ret < 0)
 553                         return ret;
 554                 conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) &
 555                         PV88080_BUCK_VRANGE_GAIN_MASK);
 556
 557                 pv88080_regulator_info[i].desc.min_uV =
 558                         pv88080_buck_vol[conf2].min_uV * (conf5+1);
 559                 pv88080_regulator_info[i].desc.uV_step =
 560                         pv88080_buck_vol[conf2].uV_step * (conf5+1);
 561                 pv88080_regulator_info[i].desc.n_voltages =
 562                         ((pv88080_buck_vol[conf2].max_uV * (conf5+1))
 563                         - (pv88080_regulator_info[i].desc.min_uV))
 564                         /(pv88080_regulator_info[i].desc.uV_step) + 1;
 565
 566                 config.driver_data = (void *)&pv88080_regulator_info[i];
 567                 chip->rdev[i] = devm_regulator_register(chip->dev,
 568                         &pv88080_regulator_info[i].desc, &config);
 569                 if (IS_ERR(chip->rdev[i])) {
 570                         dev_err(chip->dev,
 571                                 "Failed to register PV88080 regulator\n");
 572                         return PTR_ERR(chip->rdev[i]);
 573                 }
 574         }
 575
 576         pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg
 577                 = regmap_config->hvbuck_enable_reg;
 578         pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask
 579                 = regmap_config->hvbuck_enable_mask;
 580         pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg
 581                 = regmap_config->hvbuck_vsel_reg;
 582         pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask
 583                 = regmap_config->hvbuck_vsel_mask;
 584
 585         /* Registeration for HVBUCK */
 586         if (init_data)
 587                 config.init_data = &init_data[PV88080_ID_HVBUCK];
 588
 589         config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK];
 590         chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev,
 591                 &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config);
 592         if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) {
 593                 dev_err(chip->dev, "Failed to register PV88080 regulator\n");
 594                 return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]);
 595         }
 596
 597         return 0;
 598 }
 599
 600 static const struct i2c_device_id pv88080_i2c_id[] = {
 601         { "pv88080",    TYPE_PV88080_AA },
 602         { "pv88080-aa", TYPE_PV88080_AA },
 603         { "pv88080-ba", TYPE_PV88080_BA },
 604         {},
 605 };
 606 MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id);
 607
 608 static struct i2c_driver pv88080_regulator_driver = {
 609         .driver = {
 610                 .name = "pv88080",
 611                 .of_match_table = of_match_ptr(pv88080_dt_ids),
 612         },
 613         .probe = pv88080_i2c_probe,
 614         .id_table = pv88080_i2c_id,
 615 };
 616
 617 module_i2c_driver(pv88080_regulator_driver);
 618
 619 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
 620 MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080");
 621 MODULE_LICENSE("GPL");