drivers/regulator/max77686.c

   1 /*
   2  * max77686.c - Regulator driver for the Maxim 77686
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * Chiwoong Byun <woong.byun@smasung.com>
   6  * Jonghwa Lee <jonghwa3.lee@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * This driver is based on max8997.c
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/bug.h>
  27 #include <linux/err.h>
  28 #include <linux/gpio.h>
  29 #include <linux/slab.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/regulator/driver.h>
  32 #include <linux/regulator/machine.h>
  33 #include <linux/regulator/of_regulator.h>
  34 #include <linux/mfd/max77686.h>
  35 #include <linux/mfd/max77686-private.h>
  36
  37 #define MAX77686_LDO_MINUV      800000
  38 #define MAX77686_LDO_UVSTEP     50000
  39 #define MAX77686_LDO_LOW_MINUV  800000
  40 #define MAX77686_LDO_LOW_UVSTEP 25000
  41 #define MAX77686_BUCK_MINUV     750000
  42 #define MAX77686_BUCK_UVSTEP    50000
  43 #define MAX77686_RAMP_DELAY     100000                  /* uV/us */
  44 #define MAX77686_DVS_RAMP_DELAY 27500                   /* uV/us */
  45 #define MAX77686_DVS_MINUV      600000
  46 #define MAX77686_DVS_UVSTEP     12500
  47
  48 /*
  49  * Values used for configuring LDOs and bucks.
  50  * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
  51  */
  52 #define MAX77686_LDO_LOWPOWER           0x1
  53 /*
  54  * On/off controlled by PWRREQ:
  55  *  - LDO2, 6-8, 10-12, 14-16
  56  *  - buck[1234]
  57  */
  58 #define MAX77686_OFF_PWRREQ             0x1
  59 /* Low power mode controlled by PWRREQ: All LDOs */
  60 #define MAX77686_LDO_LOWPOWER_PWRREQ    0x2
  61 /* Forcing low power mode: buck[234] */
  62 #define MAX77686_BUCK_LOWPOWER          0x2
  63 #define MAX77686_NORMAL                 0x3
  64
  65 #define MAX77686_OPMODE_SHIFT   6
  66 #define MAX77686_OPMODE_BUCK234_SHIFT   4
  67 #define MAX77686_OPMODE_MASK    0x3
  68
  69 #define MAX77686_VSEL_MASK      0x3F
  70 #define MAX77686_DVS_VSEL_MASK  0xFF
  71
  72 #define MAX77686_RAMP_RATE_MASK 0xC0
  73
  74 #define MAX77686_REGULATORS     MAX77686_REG_MAX
  75 #define MAX77686_LDOS           26
  76
  77 enum max77686_ramp_rate {
  78         RAMP_RATE_13P75MV,
  79         RAMP_RATE_27P5MV,
  80         RAMP_RATE_55MV,
  81         RAMP_RATE_NO_CTRL,      /* 100mV/us */
  82 };
  83
  84 struct max77686_data {
  85         unsigned int opmode[MAX77686_REGULATORS];
  86 };
  87
  88 static unsigned int max77686_get_opmode_shift(int id)
  89 {
  90         switch (id) {
  91         case MAX77686_BUCK1:
  92         case MAX77686_BUCK5 ... MAX77686_BUCK9:
  93                 return 0;
  94         case MAX77686_BUCK2 ... MAX77686_BUCK4:
  95                 return MAX77686_OPMODE_BUCK234_SHIFT;
  96         default:
  97                 /* all LDOs */
  98                 return MAX77686_OPMODE_SHIFT;
  99         }
 100 }
 101
 102 /* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
 103 static int max77686_set_suspend_disable(struct regulator_dev *rdev)
 104 {
 105         unsigned int val, shift;
 106         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 107         int ret, id = rdev_get_id(rdev);
 108
 109         shift = max77686_get_opmode_shift(id);
 110         val = MAX77686_OFF_PWRREQ;
 111
 112         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 113                                  rdev->desc->enable_mask, val << shift);
 114         if (ret)
 115                 return ret;
 116
 117         max77686->opmode[id] = val;
 118         return 0;
 119 }
 120
 121 /* Some LDOs supports [LPM/Normal]ON mode during suspend state */
 122 static int max77686_set_suspend_mode(struct regulator_dev *rdev,
 123                                      unsigned int mode)
 124 {
 125         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 126         unsigned int val;
 127         int ret, id = rdev_get_id(rdev);
 128
 129         /* BUCK[5-9] doesn't support this feature */
 130         if (id >= MAX77686_BUCK5)
 131                 return 0;
 132
 133         switch (mode) {
 134         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 135                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
 136                 break;
 137         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 138                 val = MAX77686_NORMAL;
 139                 break;
 140         default:
 141                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 142                         rdev->desc->name, mode);
 143                 return -EINVAL;
 144         }
 145
 146         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 147                                   rdev->desc->enable_mask,
 148                                   val << MAX77686_OPMODE_SHIFT);
 149         if (ret)
 150                 return ret;
 151
 152         max77686->opmode[id] = val;
 153         return 0;
 154 }
 155
 156 /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
 157 static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
 158                                      unsigned int mode)
 159 {
 160         unsigned int val;
 161         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 162         int ret;
 163
 164         switch (mode) {
 165         case REGULATOR_MODE_STANDBY:                    /* switch off */
 166                 val = MAX77686_OFF_PWRREQ;
 167                 break;
 168         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 169                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
 170                 break;
 171         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 172                 val = MAX77686_NORMAL;
 173                 break;
 174         default:
 175                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 176                         rdev->desc->name, mode);
 177                 return -EINVAL;
 178         }
 179
 180         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 181                                  rdev->desc->enable_mask,
 182                                  val << MAX77686_OPMODE_SHIFT);
 183         if (ret)
 184                 return ret;
 185
 186         max77686->opmode[rdev_get_id(rdev)] = val;
 187         return 0;
 188 }
 189
 190 static int max77686_enable(struct regulator_dev *rdev)
 191 {
 192         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 193         unsigned int shift;
 194         int id = rdev_get_id(rdev);
 195
 196         shift = max77686_get_opmode_shift(id);
 197
 198         if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
 199                 max77686->opmode[id] = MAX77686_NORMAL;
 200
 201         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 202                                   rdev->desc->enable_mask,
 203                                   max77686->opmode[id] << shift);
 204 }
 205
 206 static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 207 {
 208         unsigned int ramp_value = RAMP_RATE_NO_CTRL;
 209
 210         switch (ramp_delay) {
 211         case 1 ... 13750:
 212                 ramp_value = RAMP_RATE_13P75MV;
 213                 break;
 214         case 13751 ... 27500:
 215                 ramp_value = RAMP_RATE_27P5MV;
 216                 break;
 217         case 27501 ... 55000:
 218                 ramp_value = RAMP_RATE_55MV;
 219                 break;
 220         case 55001 ... 100000:
 221                 break;
 222         default:
 223                 pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
 224                         rdev->desc->name, ramp_delay);
 225         }
 226
 227         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 228                                   MAX77686_RAMP_RATE_MASK, ramp_value << 6);
 229 }
 230
 231 static struct regulator_ops max77686_ops = {
 232         .list_voltage           = regulator_list_voltage_linear,
 233         .map_voltage            = regulator_map_voltage_linear,
 234         .is_enabled             = regulator_is_enabled_regmap,
 235         .enable                 = max77686_enable,
 236         .disable                = regulator_disable_regmap,
 237         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 238         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 239         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 240         .set_suspend_mode       = max77686_set_suspend_mode,
 241 };
 242
 243 static struct regulator_ops max77686_ldo_ops = {
 244         .list_voltage           = regulator_list_voltage_linear,
 245         .map_voltage            = regulator_map_voltage_linear,
 246         .is_enabled             = regulator_is_enabled_regmap,
 247         .enable                 = max77686_enable,
 248         .disable                = regulator_disable_regmap,
 249         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 250         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 251         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 252         .set_suspend_mode       = max77686_ldo_set_suspend_mode,
 253         .set_suspend_disable    = max77686_set_suspend_disable,
 254 };
 255
 256 static struct regulator_ops max77686_buck1_ops = {
 257         .list_voltage           = regulator_list_voltage_linear,
 258         .map_voltage            = regulator_map_voltage_linear,
 259         .is_enabled             = regulator_is_enabled_regmap,
 260         .enable                 = max77686_enable,
 261         .disable                = regulator_disable_regmap,
 262         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 263         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 264         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 265         .set_suspend_disable    = max77686_set_suspend_disable,
 266 };
 267
 268 static struct regulator_ops max77686_buck_dvs_ops = {
 269         .list_voltage           = regulator_list_voltage_linear,
 270         .map_voltage            = regulator_map_voltage_linear,
 271         .is_enabled             = regulator_is_enabled_regmap,
 272         .enable                 = max77686_enable,
 273         .disable                = regulator_disable_regmap,
 274         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 275         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 276         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 277         .set_ramp_delay         = max77686_set_ramp_delay,
 278         .set_suspend_disable    = max77686_set_suspend_disable,
 279 };
 280
 281 #define regulator_desc_ldo(num)         {                               \
 282         .name           = "LDO"#num,                                    \
 283         .id             = MAX77686_LDO##num,                            \
 284         .ops            = &max77686_ops,                                \
 285         .type           = REGULATOR_VOLTAGE,                            \
 286         .owner          = THIS_MODULE,                                  \
 287         .min_uV         = MAX77686_LDO_MINUV,                           \
 288         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 289         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 290         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 291         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 292         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 293         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 294         .enable_mask    = MAX77686_OPMODE_MASK                          \
 295                         << MAX77686_OPMODE_SHIFT,                       \
 296 }
 297 #define regulator_desc_lpm_ldo(num)     {                               \
 298         .name           = "LDO"#num,                                    \
 299         .id             = MAX77686_LDO##num,                            \
 300         .ops            = &max77686_ldo_ops,                            \
 301         .type           = REGULATOR_VOLTAGE,                            \
 302         .owner          = THIS_MODULE,                                  \
 303         .min_uV         = MAX77686_LDO_MINUV,                           \
 304         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 305         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 306         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 307         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 308         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 309         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 310         .enable_mask    = MAX77686_OPMODE_MASK                          \
 311                         << MAX77686_OPMODE_SHIFT,                       \
 312 }
 313 #define regulator_desc_ldo_low(num)             {                       \
 314         .name           = "LDO"#num,                                    \
 315         .id             = MAX77686_LDO##num,                            \
 316         .ops            = &max77686_ldo_ops,                            \
 317         .type           = REGULATOR_VOLTAGE,                            \
 318         .owner          = THIS_MODULE,                                  \
 319         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 320         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 321         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 322         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 323         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 324         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 325         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 326         .enable_mask    = MAX77686_OPMODE_MASK                          \
 327                         << MAX77686_OPMODE_SHIFT,                       \
 328 }
 329 #define regulator_desc_ldo1_low(num)            {                       \
 330         .name           = "LDO"#num,                                    \
 331         .id             = MAX77686_LDO##num,                            \
 332         .ops            = &max77686_ops,                                \
 333         .type           = REGULATOR_VOLTAGE,                            \
 334         .owner          = THIS_MODULE,                                  \
 335         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 336         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 337         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 338         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 339         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 340         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 341         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 342         .enable_mask    = MAX77686_OPMODE_MASK                          \
 343                         << MAX77686_OPMODE_SHIFT,                       \
 344 }
 345 #define regulator_desc_buck(num)                {                       \
 346         .name           = "BUCK"#num,                                   \
 347         .id             = MAX77686_BUCK##num,                           \
 348         .ops            = &max77686_ops,                                \
 349         .type           = REGULATOR_VOLTAGE,                            \
 350         .owner          = THIS_MODULE,                                  \
 351         .min_uV         = MAX77686_BUCK_MINUV,                          \
 352         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 353         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 354         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 355         .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
 356         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 357         .enable_reg     = MAX77686_REG_BUCK5CTRL + (num - 5) * 2,       \
 358         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 359 }
 360 #define regulator_desc_buck1(num)               {                       \
 361         .name           = "BUCK"#num,                                   \
 362         .id             = MAX77686_BUCK##num,                           \
 363         .ops            = &max77686_buck1_ops,                          \
 364         .type           = REGULATOR_VOLTAGE,                            \
 365         .owner          = THIS_MODULE,                                  \
 366         .min_uV         = MAX77686_BUCK_MINUV,                          \
 367         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 368         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 369         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 370         .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
 371         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 372         .enable_reg     = MAX77686_REG_BUCK1CTRL,                       \
 373         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 374 }
 375 #define regulator_desc_buck_dvs(num)            {                       \
 376         .name           = "BUCK"#num,                                   \
 377         .id             = MAX77686_BUCK##num,                           \
 378         .ops            = &max77686_buck_dvs_ops,                       \
 379         .type           = REGULATOR_VOLTAGE,                            \
 380         .owner          = THIS_MODULE,                                  \
 381         .min_uV         = MAX77686_DVS_MINUV,                           \
 382         .uV_step        = MAX77686_DVS_UVSTEP,                          \
 383         .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
 384         .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
 385         .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
 386         .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \
 387         .enable_reg     = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
 388         .enable_mask    = MAX77686_OPMODE_MASK                          \
 389                         << MAX77686_OPMODE_BUCK234_SHIFT,               \
 390 }
 391
 392 static const struct regulator_desc regulators[] = {
 393         regulator_desc_ldo1_low(1),
 394         regulator_desc_ldo_low(2),
 395         regulator_desc_ldo(3),
 396         regulator_desc_ldo(4),
 397         regulator_desc_ldo(5),
 398         regulator_desc_ldo_low(6),
 399         regulator_desc_ldo_low(7),
 400         regulator_desc_ldo_low(8),
 401         regulator_desc_ldo(9),
 402         regulator_desc_lpm_ldo(10),
 403         regulator_desc_lpm_ldo(11),
 404         regulator_desc_lpm_ldo(12),
 405         regulator_desc_ldo(13),
 406         regulator_desc_lpm_ldo(14),
 407         regulator_desc_ldo_low(15),
 408         regulator_desc_lpm_ldo(16),
 409         regulator_desc_ldo(17),
 410         regulator_desc_ldo(18),
 411         regulator_desc_ldo(19),
 412         regulator_desc_ldo(20),
 413         regulator_desc_ldo(21),
 414         regulator_desc_ldo(22),
 415         regulator_desc_ldo(23),
 416         regulator_desc_ldo(24),
 417         regulator_desc_ldo(25),
 418         regulator_desc_ldo(26),
 419         regulator_desc_buck1(1),
 420         regulator_desc_buck_dvs(2),
 421         regulator_desc_buck_dvs(3),
 422         regulator_desc_buck_dvs(4),
 423         regulator_desc_buck(5),
 424         regulator_desc_buck(6),
 425         regulator_desc_buck(7),
 426         regulator_desc_buck(8),
 427         regulator_desc_buck(9),
 428 };
 429
 430 #ifdef CONFIG_OF
 431 static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
 432                                         struct max77686_platform_data *pdata)
 433 {
 434         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 435         struct device_node *pmic_np, *regulators_np;
 436         struct max77686_regulator_data *rdata;
 437         struct of_regulator_match rmatch;
 438         unsigned int i;
 439
 440         pmic_np = iodev->dev->of_node;
 441         regulators_np = of_get_child_by_name(pmic_np, "voltage-regulators");
 442         if (!regulators_np) {
 443                 dev_err(&pdev->dev, "could not find regulators sub-node\n");
 444                 return -EINVAL;
 445         }
 446
 447         pdata->num_regulators = ARRAY_SIZE(regulators);
 448         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
 449                              pdata->num_regulators, GFP_KERNEL);
 450         if (!rdata) {
 451                 of_node_put(regulators_np);
 452                 return -ENOMEM;
 453         }
 454
 455         for (i = 0; i < pdata->num_regulators; i++) {
 456                 rmatch.name = regulators[i].name;
 457                 rmatch.init_data = NULL;
 458                 rmatch.of_node = NULL;
 459                 of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
 460                 rdata[i].initdata = rmatch.init_data;
 461                 rdata[i].of_node = rmatch.of_node;
 462         }
 463
 464         pdata->regulators = rdata;
 465         of_node_put(regulators_np);
 466
 467         return 0;
 468 }
 469 #else
 470 static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
 471                                         struct max77686_platform_data *pdata)
 472 {
 473         return 0;
 474 }
 475 #endif /* CONFIG_OF */
 476
 477 static int max77686_pmic_probe(struct platform_device *pdev)
 478 {
 479         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 480         struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
 481         struct max77686_data *max77686;
 482         int i, ret = 0;
 483         struct regulator_config config = { };
 484
 485         dev_dbg(&pdev->dev, "%s\n", __func__);
 486
 487         if (!pdata) {
 488                 dev_err(&pdev->dev, "no platform data found for regulator\n");
 489                 return -ENODEV;
 490         }
 491
 492         if (iodev->dev->of_node) {
 493                 ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
 494                 if (ret)
 495                         return ret;
 496         }
 497
 498         if (pdata->num_regulators != MAX77686_REGULATORS) {
 499                 dev_err(&pdev->dev,
 500                         "Invalid initial data for regulator's initialiation\n");
 501                 return -EINVAL;
 502         }
 503
 504         max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
 505                                 GFP_KERNEL);
 506         if (!max77686)
 507                 return -ENOMEM;
 508
 509         config.dev = &pdev->dev;
 510         config.regmap = iodev->regmap;
 511         config.driver_data = max77686;
 512         platform_set_drvdata(pdev, max77686);
 513
 514         for (i = 0; i < MAX77686_REGULATORS; i++) {
 515                 struct regulator_dev *rdev;
 516
 517                 config.init_data = pdata->regulators[i].initdata;
 518                 config.of_node = pdata->regulators[i].of_node;
 519
 520                 max77686->opmode[i] = regulators[i].enable_mask >>
 521                                                 max77686_get_opmode_shift(i);
 522                 rdev = devm_regulator_register(&pdev->dev,
 523                                                 &regulators[i], &config);
 524                 if (IS_ERR(rdev)) {
 525                         dev_err(&pdev->dev,
 526                                 "regulator init failed for %d\n", i);
 527                         return PTR_ERR(rdev);
 528                 }
 529         }
 530
 531         return 0;
 532 }
 533
 534 static const struct platform_device_id max77686_pmic_id[] = {
 535         {"max77686-pmic", 0},
 536         { },
 537 };
 538 MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
 539
 540 static struct platform_driver max77686_pmic_driver = {
 541         .driver = {
 542                 .name = "max77686-pmic",
 543                 .owner = THIS_MODULE,
 544         },
 545         .probe = max77686_pmic_probe,
 546         .id_table = max77686_pmic_id,
 547 };
 548
 549 static int __init max77686_pmic_init(void)
 550 {
 551         return platform_driver_register(&max77686_pmic_driver);
 552 }
 553 subsys_initcall(max77686_pmic_init);
 554
 555 static void __exit max77686_pmic_cleanup(void)
 556 {
 557         platform_driver_unregister(&max77686_pmic_driver);
 558 }
 559 module_exit(max77686_pmic_cleanup);
 560
 561 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
 562 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
 563 MODULE_LICENSE("GPL");