drivers/regulator/max77686-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // max77686.c - Regulator driver for the Maxim 77686
   4 //
   5 // Copyright (C) 2012 Samsung Electronics
   6 // Chiwoong Byun <woong.byun@samsung.com>
   7 // Jonghwa Lee <jonghwa3.lee@samsung.com>
   8 //
   9 // This driver is based on max8997.c
  10
  11 #include <linux/kernel.h>
  12 #include <linux/bug.h>
  13 #include <linux/err.h>
  14 #include <linux/gpio/consumer.h>
  15 #include <linux/slab.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regulator/driver.h>
  18 #include <linux/regulator/machine.h>
  19 #include <linux/regulator/of_regulator.h>
  20 #include <linux/mfd/max77686.h>
  21 #include <linux/mfd/max77686-private.h>
  22
  23 #define MAX77686_LDO_MINUV      800000
  24 #define MAX77686_LDO_UVSTEP     50000
  25 #define MAX77686_LDO_LOW_MINUV  800000
  26 #define MAX77686_LDO_LOW_UVSTEP 25000
  27 #define MAX77686_BUCK_MINUV     750000
  28 #define MAX77686_BUCK_UVSTEP    50000
  29 #define MAX77686_BUCK_ENABLE_TIME       40              /* us */
  30 #define MAX77686_DVS_ENABLE_TIME        22              /* us */
  31 #define MAX77686_RAMP_DELAY     100000                  /* uV/us */
  32 #define MAX77686_DVS_RAMP_DELAY 27500                   /* uV/us */
  33 #define MAX77686_DVS_MINUV      600000
  34 #define MAX77686_DVS_UVSTEP     12500
  35
  36 /*
  37  * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
  38  * It is the same as 'off' for other regulators.
  39  */
  40 #define MAX77686_GPIO_CONTROL           0x0
  41 /*
  42  * Values used for configuring LDOs and bucks.
  43  * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
  44  */
  45 #define MAX77686_LDO_LOWPOWER           0x1
  46 /*
  47  * On/off controlled by PWRREQ:
  48  *  - LDO2, 6-8, 10-12, 14-16
  49  *  - buck[1234]
  50  */
  51 #define MAX77686_OFF_PWRREQ             0x1
  52 /* Low power mode controlled by PWRREQ: All LDOs */
  53 #define MAX77686_LDO_LOWPOWER_PWRREQ    0x2
  54 /* Forcing low power mode: buck[234] */
  55 #define MAX77686_BUCK_LOWPOWER          0x2
  56 #define MAX77686_NORMAL                 0x3
  57
  58 #define MAX77686_OPMODE_SHIFT   6
  59 #define MAX77686_OPMODE_BUCK234_SHIFT   4
  60 #define MAX77686_OPMODE_MASK    0x3
  61
  62 #define MAX77686_VSEL_MASK      0x3F
  63 #define MAX77686_DVS_VSEL_MASK  0xFF
  64
  65 #define MAX77686_RAMP_RATE_MASK 0xC0
  66
  67 #define MAX77686_REGULATORS     MAX77686_REG_MAX
  68 #define MAX77686_LDOS           26
  69
  70 struct max77686_data {
  71         struct device *dev;
  72         DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
  73
  74         /* Array indexed by regulator id */
  75         unsigned int opmode[MAX77686_REGULATORS];
  76 };
  77
  78 static unsigned int max77686_get_opmode_shift(int id)
  79 {
  80         switch (id) {
  81         case MAX77686_BUCK1:
  82         case MAX77686_BUCK5 ... MAX77686_BUCK9:
  83                 return 0;
  84         case MAX77686_BUCK2 ... MAX77686_BUCK4:
  85                 return MAX77686_OPMODE_BUCK234_SHIFT;
  86         default:
  87                 /* all LDOs */
  88                 return MAX77686_OPMODE_SHIFT;
  89         }
  90 }
  91
  92 /*
  93  * When regulator is configured for GPIO control then it
  94  * replaces "normal" mode. Any change from low power mode to normal
  95  * should actually change to GPIO control.
  96  * Map normal mode to proper value for such regulators.
  97  */
  98 static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
  99                                              int id)
 100 {
 101         switch (id) {
 102         case MAX77686_BUCK8:
 103         case MAX77686_BUCK9:
 104         case MAX77686_LDO20 ... MAX77686_LDO22:
 105                 if (test_bit(id, max77686->gpio_enabled))
 106                         return MAX77686_GPIO_CONTROL;
 107         }
 108
 109         return MAX77686_NORMAL;
 110 }
 111
 112 /* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
 113 static int max77686_set_suspend_disable(struct regulator_dev *rdev)
 114 {
 115         unsigned int val, shift;
 116         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 117         int ret, id = rdev_get_id(rdev);
 118
 119         shift = max77686_get_opmode_shift(id);
 120         val = MAX77686_OFF_PWRREQ;
 121
 122         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 123                                  rdev->desc->enable_mask, val << shift);
 124         if (ret)
 125                 return ret;
 126
 127         max77686->opmode[id] = val;
 128         return 0;
 129 }
 130
 131 /* Some LDOs supports [LPM/Normal]ON mode during suspend state */
 132 static int max77686_set_suspend_mode(struct regulator_dev *rdev,
 133                                      unsigned int mode)
 134 {
 135         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 136         unsigned int val;
 137         int ret, id = rdev_get_id(rdev);
 138
 139         /* BUCK[5-9] doesn't support this feature */
 140         if (id >= MAX77686_BUCK5)
 141                 return 0;
 142
 143         switch (mode) {
 144         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 145                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
 146                 break;
 147         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 148                 val = max77686_map_normal_mode(max77686, id);
 149                 break;
 150         default:
 151                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 152                         rdev->desc->name, mode);
 153                 return -EINVAL;
 154         }
 155
 156         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 157                                   rdev->desc->enable_mask,
 158                                   val << MAX77686_OPMODE_SHIFT);
 159         if (ret)
 160                 return ret;
 161
 162         max77686->opmode[id] = val;
 163         return 0;
 164 }
 165
 166 /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
 167 static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
 168                                      unsigned int mode)
 169 {
 170         unsigned int val;
 171         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 172         int ret, id = rdev_get_id(rdev);
 173
 174         switch (mode) {
 175         case REGULATOR_MODE_STANDBY:                    /* switch off */
 176                 val = MAX77686_OFF_PWRREQ;
 177                 break;
 178         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 179                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
 180                 break;
 181         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 182                 val = max77686_map_normal_mode(max77686, id);
 183                 break;
 184         default:
 185                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 186                         rdev->desc->name, mode);
 187                 return -EINVAL;
 188         }
 189
 190         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 191                                  rdev->desc->enable_mask,
 192                                  val << MAX77686_OPMODE_SHIFT);
 193         if (ret)
 194                 return ret;
 195
 196         max77686->opmode[id] = val;
 197         return 0;
 198 }
 199
 200 static int max77686_enable(struct regulator_dev *rdev)
 201 {
 202         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 203         unsigned int shift;
 204         int id = rdev_get_id(rdev);
 205
 206         shift = max77686_get_opmode_shift(id);
 207
 208         if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
 209                 max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
 210
 211         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 212                                   rdev->desc->enable_mask,
 213                                   max77686->opmode[id] << shift);
 214 }
 215
 216 static int max77686_of_parse_cb(struct device_node *np,
 217                 const struct regulator_desc *desc,
 218                 struct regulator_config *config)
 219 {
 220         struct max77686_data *max77686 = config->driver_data;
 221         int ret;
 222
 223         switch (desc->id) {
 224         case MAX77686_BUCK8:
 225         case MAX77686_BUCK9:
 226         case MAX77686_LDO20 ... MAX77686_LDO22:
 227                 config->ena_gpiod = fwnode_gpiod_get_index(
 228                                 of_fwnode_handle(np),
 229                                 "maxim,ena",
 230                                 0,
 231                                 GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 232                                 "max77686-regulator");
 233                 if (IS_ERR(config->ena_gpiod))
 234                         config->ena_gpiod = NULL;
 235                 break;
 236         default:
 237                 return 0;
 238         }
 239
 240         if (config->ena_gpiod) {
 241                 set_bit(desc->id, max77686->gpio_enabled);
 242
 243                 ret = regmap_update_bits(config->regmap, desc->enable_reg,
 244                                          desc->enable_mask,
 245                                          MAX77686_GPIO_CONTROL);
 246                 if (ret) {
 247                         gpiod_put(config->ena_gpiod);
 248                         config->ena_gpiod = NULL;
 249                 }
 250         }
 251
 252         return 0;
 253 }
 254
 255 static const unsigned int max77686_buck_dvs_ramp_table[] = {
 256         13750, 27500, 55000, 100000
 257 };
 258
 259 static const struct regulator_ops max77686_ops = {
 260         .list_voltage           = regulator_list_voltage_linear,
 261         .map_voltage            = regulator_map_voltage_linear,
 262         .is_enabled             = regulator_is_enabled_regmap,
 263         .enable                 = max77686_enable,
 264         .disable                = regulator_disable_regmap,
 265         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 266         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 267         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 268         .set_suspend_mode       = max77686_set_suspend_mode,
 269 };
 270
 271 static const struct regulator_ops max77686_ldo_ops = {
 272         .list_voltage           = regulator_list_voltage_linear,
 273         .map_voltage            = regulator_map_voltage_linear,
 274         .is_enabled             = regulator_is_enabled_regmap,
 275         .enable                 = max77686_enable,
 276         .disable                = regulator_disable_regmap,
 277         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 278         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 279         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 280         .set_suspend_mode       = max77686_ldo_set_suspend_mode,
 281         .set_suspend_disable    = max77686_set_suspend_disable,
 282 };
 283
 284 static const struct regulator_ops max77686_buck1_ops = {
 285         .list_voltage           = regulator_list_voltage_linear,
 286         .map_voltage            = regulator_map_voltage_linear,
 287         .is_enabled             = regulator_is_enabled_regmap,
 288         .enable                 = max77686_enable,
 289         .disable                = regulator_disable_regmap,
 290         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 291         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 292         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 293         .set_suspend_disable    = max77686_set_suspend_disable,
 294 };
 295
 296 static const struct regulator_ops max77686_buck_dvs_ops = {
 297         .list_voltage           = regulator_list_voltage_linear,
 298         .map_voltage            = regulator_map_voltage_linear,
 299         .is_enabled             = regulator_is_enabled_regmap,
 300         .enable                 = max77686_enable,
 301         .disable                = regulator_disable_regmap,
 302         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 303         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 304         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 305         .set_ramp_delay         = regulator_set_ramp_delay_regmap,
 306         .set_suspend_disable    = max77686_set_suspend_disable,
 307 };
 308
 309 #define regulator_desc_ldo(num)         {                               \
 310         .name           = "LDO"#num,                                    \
 311         .of_match       = of_match_ptr("LDO"#num),                      \
 312         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 313         .of_parse_cb    = max77686_of_parse_cb,                         \
 314         .id             = MAX77686_LDO##num,                            \
 315         .ops            = &max77686_ops,                                \
 316         .type           = REGULATOR_VOLTAGE,                            \
 317         .owner          = THIS_MODULE,                                  \
 318         .min_uV         = MAX77686_LDO_MINUV,                           \
 319         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 320         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 321         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 322         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 323         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 324         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 325         .enable_mask    = MAX77686_OPMODE_MASK                          \
 326                         << MAX77686_OPMODE_SHIFT,                       \
 327 }
 328 #define regulator_desc_lpm_ldo(num)     {                               \
 329         .name           = "LDO"#num,                                    \
 330         .of_match       = of_match_ptr("LDO"#num),                      \
 331         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 332         .id             = MAX77686_LDO##num,                            \
 333         .ops            = &max77686_ldo_ops,                            \
 334         .type           = REGULATOR_VOLTAGE,                            \
 335         .owner          = THIS_MODULE,                                  \
 336         .min_uV         = MAX77686_LDO_MINUV,                           \
 337         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 338         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 339         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 340         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 341         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 342         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 343         .enable_mask    = MAX77686_OPMODE_MASK                          \
 344                         << MAX77686_OPMODE_SHIFT,                       \
 345 }
 346 #define regulator_desc_ldo_low(num)             {                       \
 347         .name           = "LDO"#num,                                    \
 348         .of_match       = of_match_ptr("LDO"#num),                      \
 349         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 350         .id             = MAX77686_LDO##num,                            \
 351         .ops            = &max77686_ldo_ops,                            \
 352         .type           = REGULATOR_VOLTAGE,                            \
 353         .owner          = THIS_MODULE,                                  \
 354         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 355         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 356         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 357         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 358         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 359         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 360         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 361         .enable_mask    = MAX77686_OPMODE_MASK                          \
 362                         << MAX77686_OPMODE_SHIFT,                       \
 363 }
 364 #define regulator_desc_ldo1_low(num)            {                       \
 365         .name           = "LDO"#num,                                    \
 366         .of_match       = of_match_ptr("LDO"#num),                      \
 367         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 368         .id             = MAX77686_LDO##num,                            \
 369         .ops            = &max77686_ops,                                \
 370         .type           = REGULATOR_VOLTAGE,                            \
 371         .owner          = THIS_MODULE,                                  \
 372         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 373         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 374         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 375         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 376         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 377         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 378         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 379         .enable_mask    = MAX77686_OPMODE_MASK                          \
 380                         << MAX77686_OPMODE_SHIFT,                       \
 381 }
 382 #define regulator_desc_buck(num)                {                       \
 383         .name           = "BUCK"#num,                                   \
 384         .of_match       = of_match_ptr("BUCK"#num),                     \
 385         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 386         .of_parse_cb    = max77686_of_parse_cb,                         \
 387         .id             = MAX77686_BUCK##num,                           \
 388         .ops            = &max77686_ops,                                \
 389         .type           = REGULATOR_VOLTAGE,                            \
 390         .owner          = THIS_MODULE,                                  \
 391         .min_uV         = MAX77686_BUCK_MINUV,                          \
 392         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 393         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 394         .enable_time    = MAX77686_BUCK_ENABLE_TIME,                    \
 395         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 396         .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
 397         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 398         .enable_reg     = MAX77686_REG_BUCK5CTRL + (num - 5) * 2,       \
 399         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 400 }
 401 #define regulator_desc_buck1(num)               {                       \
 402         .name           = "BUCK"#num,                                   \
 403         .of_match       = of_match_ptr("BUCK"#num),                     \
 404         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 405         .id             = MAX77686_BUCK##num,                           \
 406         .ops            = &max77686_buck1_ops,                          \
 407         .type           = REGULATOR_VOLTAGE,                            \
 408         .owner          = THIS_MODULE,                                  \
 409         .min_uV         = MAX77686_BUCK_MINUV,                          \
 410         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 411         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 412         .enable_time    = MAX77686_BUCK_ENABLE_TIME,                    \
 413         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 414         .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
 415         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 416         .enable_reg     = MAX77686_REG_BUCK1CTRL,                       \
 417         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 418 }
 419 #define regulator_desc_buck_dvs(num)            {                       \
 420         .name           = "BUCK"#num,                                   \
 421         .of_match       = of_match_ptr("BUCK"#num),                     \
 422         .regulators_node        = of_match_ptr("voltage-regulators"),   \
 423         .id             = MAX77686_BUCK##num,                           \
 424         .ops            = &max77686_buck_dvs_ops,                       \
 425         .type           = REGULATOR_VOLTAGE,                            \
 426         .owner          = THIS_MODULE,                                  \
 427         .min_uV         = MAX77686_DVS_MINUV,                           \
 428         .uV_step        = MAX77686_DVS_UVSTEP,                          \
 429         .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
 430         .enable_time    = MAX77686_DVS_ENABLE_TIME,                     \
 431         .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
 432         .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
 433         .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \
 434         .enable_reg     = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
 435         .enable_mask    = MAX77686_OPMODE_MASK                          \
 436                         << MAX77686_OPMODE_BUCK234_SHIFT,               \
 437         .ramp_reg       = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
 438         .ramp_mask      = MAX77686_RAMP_RATE_MASK,                      \
 439         .ramp_delay_table = max77686_buck_dvs_ramp_table,               \
 440         .n_ramp_values  = ARRAY_SIZE(max77686_buck_dvs_ramp_table),     \
 441 }
 442
 443 static const struct regulator_desc regulators[] = {
 444         regulator_desc_ldo1_low(1),
 445         regulator_desc_ldo_low(2),
 446         regulator_desc_ldo(3),
 447         regulator_desc_ldo(4),
 448         regulator_desc_ldo(5),
 449         regulator_desc_ldo_low(6),
 450         regulator_desc_ldo_low(7),
 451         regulator_desc_ldo_low(8),
 452         regulator_desc_ldo(9),
 453         regulator_desc_lpm_ldo(10),
 454         regulator_desc_lpm_ldo(11),
 455         regulator_desc_lpm_ldo(12),
 456         regulator_desc_ldo(13),
 457         regulator_desc_lpm_ldo(14),
 458         regulator_desc_ldo_low(15),
 459         regulator_desc_lpm_ldo(16),
 460         regulator_desc_ldo(17),
 461         regulator_desc_ldo(18),
 462         regulator_desc_ldo(19),
 463         regulator_desc_ldo(20),
 464         regulator_desc_ldo(21),
 465         regulator_desc_ldo(22),
 466         regulator_desc_ldo(23),
 467         regulator_desc_ldo(24),
 468         regulator_desc_ldo(25),
 469         regulator_desc_ldo(26),
 470         regulator_desc_buck1(1),
 471         regulator_desc_buck_dvs(2),
 472         regulator_desc_buck_dvs(3),
 473         regulator_desc_buck_dvs(4),
 474         regulator_desc_buck(5),
 475         regulator_desc_buck(6),
 476         regulator_desc_buck(7),
 477         regulator_desc_buck(8),
 478         regulator_desc_buck(9),
 479 };
 480
 481 static int max77686_pmic_probe(struct platform_device *pdev)
 482 {
 483         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 484         struct max77686_data *max77686;
 485         int i;
 486         struct regulator_config config = { };
 487
 488         dev_dbg(&pdev->dev, "%s\n", __func__);
 489
 490         max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
 491                                 GFP_KERNEL);
 492         if (!max77686)
 493                 return -ENOMEM;
 494
 495         max77686->dev = &pdev->dev;
 496         config.dev = iodev->dev;
 497         config.regmap = iodev->regmap;
 498         config.driver_data = max77686;
 499         platform_set_drvdata(pdev, max77686);
 500
 501         for (i = 0; i < MAX77686_REGULATORS; i++) {
 502                 struct regulator_dev *rdev;
 503                 int id = regulators[i].id;
 504
 505                 max77686->opmode[id] = MAX77686_NORMAL;
 506                 rdev = devm_regulator_register(&pdev->dev,
 507                                                 &regulators[i], &config);
 508                 if (IS_ERR(rdev)) {
 509                         int ret = PTR_ERR(rdev);
 510                         dev_err(&pdev->dev,
 511                                 "regulator init failed for %d: %d\n", i, ret);
 512                         return ret;
 513                 }
 514         }
 515
 516         return 0;
 517 }
 518
 519 static const struct platform_device_id max77686_pmic_id[] = {
 520         {"max77686-pmic", 0},
 521         { },
 522 };
 523 MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
 524
 525 static struct platform_driver max77686_pmic_driver = {
 526         .driver = {
 527                 .name = "max77686-pmic",
 528         },
 529         .probe = max77686_pmic_probe,
 530         .id_table = max77686_pmic_id,
 531 };
 532
 533 module_platform_driver(max77686_pmic_driver);
 534
 535 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
 536 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
 537 MODULE_LICENSE("GPL");