drivers/regulator/bd71815-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // Copyright 2014 Embest Technology Co. Ltd. Inc.
   4 // bd71815-regulator.c ROHM BD71815 regulator driver
   5 //
   6 // Author: Tony Luo <luofc@embedinfo.com>
   7 //
   8 // Partially rewritten at 2021 by
   9 // Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com>
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/err.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/of.h>
  17 #include <linux/gpio/consumer.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/delay.h>
  20 #include <linux/slab.h>
  21 #include <linux/mfd/rohm-generic.h>
  22 #include <linux/mfd/rohm-bd71815.h>
  23 #include <linux/regulator/of_regulator.h>
  24
  25 struct bd71815_regulator {
  26         struct regulator_desc desc;
  27         const struct rohm_dvs_config *dvs;
  28 };
  29
  30 static const int bd7181x_wled_currents[] = {
  31         10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000,
  32         5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000,
  33         16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000,
  34 };
  35
  36 static const struct rohm_dvs_config buck1_dvs = {
  37         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
  38                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
  39         .run_reg                = BD71815_REG_BUCK1_VOLT_H,
  40         .run_mask               = BD71815_VOLT_MASK,
  41         .run_on_mask            = BD71815_BUCK_RUN_ON,
  42         .snvs_on_mask           = BD71815_BUCK_SNVS_ON,
  43         .suspend_reg            = BD71815_REG_BUCK1_VOLT_L,
  44         .suspend_mask           = BD71815_VOLT_MASK,
  45         .suspend_on_mask        = BD71815_BUCK_SUSP_ON,
  46         .lpsr_reg               = BD71815_REG_BUCK1_VOLT_L,
  47         .lpsr_mask              = BD71815_VOLT_MASK,
  48         .lpsr_on_mask           = BD71815_BUCK_LPSR_ON,
  49 };
  50
  51 static const struct rohm_dvs_config buck2_dvs = {
  52         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
  53                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
  54         .run_reg                = BD71815_REG_BUCK2_VOLT_H,
  55         .run_mask               = BD71815_VOLT_MASK,
  56         .run_on_mask            = BD71815_BUCK_RUN_ON,
  57         .snvs_on_mask           = BD71815_BUCK_SNVS_ON,
  58         .suspend_reg            = BD71815_REG_BUCK2_VOLT_L,
  59         .suspend_mask           = BD71815_VOLT_MASK,
  60         .suspend_on_mask        = BD71815_BUCK_SUSP_ON,
  61         .lpsr_reg               = BD71815_REG_BUCK2_VOLT_L,
  62         .lpsr_mask              = BD71815_VOLT_MASK,
  63         .lpsr_on_mask           = BD71815_BUCK_LPSR_ON,
  64 };
  65
  66 static const struct rohm_dvs_config buck3_dvs = {
  67         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
  68                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
  69         .run_reg                = BD71815_REG_BUCK3_VOLT,
  70         .run_mask               = BD71815_VOLT_MASK,
  71         .run_on_mask            = BD71815_BUCK_RUN_ON,
  72         .snvs_on_mask           = BD71815_BUCK_SNVS_ON,
  73         .suspend_on_mask        = BD71815_BUCK_SUSP_ON,
  74         .lpsr_on_mask           = BD71815_BUCK_LPSR_ON,
  75 };
  76
  77 static const struct rohm_dvs_config buck4_dvs = {
  78         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
  79                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
  80         .run_reg                = BD71815_REG_BUCK4_VOLT,
  81         .run_mask               = BD71815_VOLT_MASK,
  82         .run_on_mask            = BD71815_BUCK_RUN_ON,
  83         .snvs_on_mask           = BD71815_BUCK_SNVS_ON,
  84         .suspend_on_mask        = BD71815_BUCK_SUSP_ON,
  85         .lpsr_on_mask           = BD71815_BUCK_LPSR_ON,
  86 };
  87
  88 static const struct rohm_dvs_config ldo1_dvs = {
  89         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
  90                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
  91         .run_reg                = BD71815_REG_LDO_MODE1,
  92         .run_mask               = BD71815_VOLT_MASK,
  93         .run_on_mask            = LDO1_RUN_ON,
  94         .snvs_on_mask           = LDO1_SNVS_ON,
  95         .suspend_on_mask        = LDO1_SUSP_ON,
  96         .lpsr_on_mask           = LDO1_LPSR_ON,
  97 };
  98
  99 static const struct rohm_dvs_config ldo2_dvs = {
 100         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 101                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 102         .run_reg                = BD71815_REG_LDO_MODE2,
 103         .run_mask               = BD71815_VOLT_MASK,
 104         .run_on_mask            = LDO2_RUN_ON,
 105         .snvs_on_mask           = LDO2_SNVS_ON,
 106         .suspend_on_mask        = LDO2_SUSP_ON,
 107         .lpsr_on_mask           = LDO2_LPSR_ON,
 108 };
 109
 110 static const struct rohm_dvs_config ldo3_dvs = {
 111         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 112                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 113         .run_reg                = BD71815_REG_LDO_MODE2,
 114         .run_mask               = BD71815_VOLT_MASK,
 115         .run_on_mask            = LDO3_RUN_ON,
 116         .snvs_on_mask           = LDO3_SNVS_ON,
 117         .suspend_on_mask        = LDO3_SUSP_ON,
 118         .lpsr_on_mask           = LDO3_LPSR_ON,
 119 };
 120
 121 static const struct rohm_dvs_config ldo4_dvs = {
 122         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 123                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 124         .run_reg                = BD71815_REG_LDO_MODE3,
 125         .run_mask               = BD71815_VOLT_MASK,
 126         .run_on_mask            = LDO4_RUN_ON,
 127         .snvs_on_mask           = LDO4_SNVS_ON,
 128         .suspend_on_mask        = LDO4_SUSP_ON,
 129         .lpsr_on_mask           = LDO4_LPSR_ON,
 130 };
 131
 132 static const struct rohm_dvs_config ldo5_dvs = {
 133         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 134                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 135         .run_reg                = BD71815_REG_LDO_MODE3,
 136         .run_mask               = BD71815_VOLT_MASK,
 137         .run_on_mask            = LDO5_RUN_ON,
 138         .snvs_on_mask           = LDO5_SNVS_ON,
 139         .suspend_on_mask        = LDO5_SUSP_ON,
 140         .lpsr_on_mask           = LDO5_LPSR_ON,
 141 };
 142
 143 static const struct rohm_dvs_config dvref_dvs = {
 144         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 145                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 146         .run_on_mask            = DVREF_RUN_ON,
 147         .snvs_on_mask           = DVREF_SNVS_ON,
 148         .suspend_on_mask        = DVREF_SUSP_ON,
 149         .lpsr_on_mask           = DVREF_LPSR_ON,
 150 };
 151
 152 static const struct rohm_dvs_config ldolpsr_dvs = {
 153         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 154                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 155         .run_on_mask            = DVREF_RUN_ON,
 156         .snvs_on_mask           = DVREF_SNVS_ON,
 157         .suspend_on_mask        = DVREF_SUSP_ON,
 158         .lpsr_on_mask           = DVREF_LPSR_ON,
 159 };
 160
 161 static const struct rohm_dvs_config buck5_dvs = {
 162         .level_map              = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
 163                                   ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
 164         .run_reg                = BD71815_REG_BUCK5_VOLT,
 165         .run_mask               = BD71815_VOLT_MASK,
 166         .run_on_mask            = BD71815_BUCK_RUN_ON,
 167         .snvs_on_mask           = BD71815_BUCK_SNVS_ON,
 168         .suspend_on_mask        = BD71815_BUCK_SUSP_ON,
 169         .lpsr_on_mask           = BD71815_BUCK_LPSR_ON,
 170 };
 171
 172 static int set_hw_dvs_levels(struct device_node *np,
 173                              const struct regulator_desc *desc,
 174                              struct regulator_config *cfg)
 175 {
 176         struct bd71815_regulator *data;
 177
 178         data = container_of(desc, struct bd71815_regulator, desc);
 179         return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap);
 180 }
 181
 182 /*
 183  * Bucks 1 and 2 have two voltage selection registers where selected
 184  * voltage can be set. Which of the registers is used can be either controlled
 185  * by a control bit in register - or by HW state. If HW state specific voltages
 186  * are given - then we assume HW state based control should be used.
 187  *
 188  * If volatge value is updated to currently selected register - then output
 189  * voltage is immediately changed no matter what is set as ramp rate. Thus we
 190  * default changing voltage by writing new value to inactive register and
 191  * then updating the 'register selection' bit. This naturally only works when
 192  * HW state machine is not used to select the voltage.
 193  */
 194 static int buck12_set_hw_dvs_levels(struct device_node *np,
 195                                     const struct regulator_desc *desc,
 196                                     struct regulator_config *cfg)
 197 {
 198         struct bd71815_regulator *data;
 199         int ret = 0, val;
 200
 201         data = container_of(desc, struct bd71815_regulator, desc);
 202
 203         if (of_property_present(np, "rohm,dvs-run-voltage") ||
 204             of_property_present(np, "rohm,dvs-suspend-voltage") ||
 205             of_property_present(np, "rohm,dvs-lpsr-voltage") ||
 206             of_property_present(np, "rohm,dvs-snvs-voltage")) {
 207                 ret = regmap_read(cfg->regmap, desc->vsel_reg, &val);
 208                 if (ret)
 209                         return ret;
 210
 211                 if (!(BD71815_BUCK_STBY_DVS & val) &&
 212                     !(BD71815_BUCK_DVSSEL & val)) {
 213                         int val2;
 214
 215                         /*
 216                          * We are currently using voltage from _L.
 217                          * We'd better copy it to _H and switch to it to
 218                          * avoid shutting us down if LPSR or SUSPEND is set to
 219                          * disabled. _L value is at reg _H + 1
 220                          */
 221                         ret = regmap_read(cfg->regmap, desc->vsel_reg + 1,
 222                                           &val2);
 223                         if (ret)
 224                                 return ret;
 225
 226                         ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
 227                                                  BD71815_VOLT_MASK |
 228                                                  BD71815_BUCK_DVSSEL,
 229                                                  val2 | BD71815_BUCK_DVSSEL);
 230                         if (ret)
 231                                 return ret;
 232                 }
 233                 ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc,
 234                                                     cfg->regmap);
 235                 if (ret)
 236                         return ret;
 237                 /*
 238                  * DVS levels were given => use HW-state machine for voltage
 239                  * controls. NOTE: AFAIK, This means that if voltage is changed
 240                  * by SW the ramp-rate is not respected. Should we disable
 241                  * SW voltage control when the HW state machine is used?
 242                  */
 243                 ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
 244                                          BD71815_BUCK_STBY_DVS,
 245                                          BD71815_BUCK_STBY_DVS);
 246         }
 247
 248         return ret;
 249 }
 250
 251 /*
 252  * BUCK1/2
 253  * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
 254  * 00: 10.00mV/usec     10mV 1uS
 255  * 01: 5.00mV/usec      10mV 2uS
 256  * 10: 2.50mV/usec      10mV 4uS
 257  * 11: 1.25mV/usec      10mV 8uS
 258  */
 259 static const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 };
 260
 261 static int bd7181x_led_set_current_limit(struct regulator_dev *rdev,
 262                                         int min_uA, int max_uA)
 263 {
 264         int ret;
 265         int onstatus;
 266
 267         onstatus = regulator_is_enabled_regmap(rdev);
 268
 269         ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
 270         if (!ret) {
 271                 int newstatus;
 272
 273                 newstatus = regulator_is_enabled_regmap(rdev);
 274                 if (onstatus != newstatus) {
 275                         /*
 276                          * HW FIX: spurious led status change detected. Toggle
 277                          * state as a workaround
 278                          */
 279                         if (onstatus)
 280                                 ret = regulator_enable_regmap(rdev);
 281                         else
 282                                 ret = regulator_disable_regmap(rdev);
 283
 284                         if (ret)
 285                                 dev_err(rdev_get_dev(rdev),
 286                                         "failed to revert the LED state (%d)\n",
 287                                         ret);
 288                 }
 289         }
 290
 291         return ret;
 292 }
 293
 294 static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev)
 295 {
 296         int rid = rdev_get_id(rdev);
 297         int ret, regh, regl, val;
 298
 299         regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2;
 300         regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2;
 301
 302         ret = regmap_read(rdev->regmap, regh, &val);
 303         if (ret)
 304                 return ret;
 305
 306         /*
 307          * If we use HW state machine based voltage reg selection - then we
 308          * return BD71815_REG_BUCK1_VOLT_H which is used at RUN.
 309          * Else we do return the BD71815_REG_BUCK1_VOLT_H or
 310          * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used
 311          * by BD71815_BUCK_DVSSEL bit
 312          */
 313         if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL)))
 314                 ret = regmap_read(rdev->regmap, regl, &val);
 315
 316         if (ret)
 317                 return ret;
 318
 319         return val & BD71815_VOLT_MASK;
 320 }
 321
 322 /*
 323  * For Buck 1/2.
 324  */
 325 static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev,
 326                                           unsigned int sel)
 327 {
 328         int rid = rdev_get_id(rdev);
 329         int ret, val, reg, regh, regl;
 330
 331         regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2;
 332         regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2;
 333
 334         ret = regmap_read(rdev->regmap, regh, &val);
 335         if (ret)
 336                 return ret;
 337
 338         /*
 339          * If bucks 1 & 2 are controlled by state machine - then the RUN state
 340          * voltage is set to BD71815_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR
 341          * voltages at runtime is not supported by this driver.
 342          */
 343         if (((val & BD71815_BUCK_STBY_DVS))) {
 344                 return regmap_update_bits(rdev->regmap, regh, BD71815_VOLT_MASK,
 345                                           sel);
 346         }
 347         /* Update new voltage to the register which is not selected now */
 348         if (val & BD71815_BUCK_DVSSEL)
 349                 reg = regl;
 350         else
 351                 reg = regh;
 352
 353         ret = regmap_update_bits(rdev->regmap, reg, BD71815_VOLT_MASK, sel);
 354         if (ret)
 355                 return ret;
 356
 357         /* Select the other DVS register to be used */
 358         return regmap_update_bits(rdev->regmap, regh, BD71815_BUCK_DVSSEL,
 359                                   ~val);
 360 }
 361
 362 static const struct regulator_ops bd7181x_ldo_regulator_ops = {
 363         .enable = regulator_enable_regmap,
 364         .disable = regulator_disable_regmap,
 365         .is_enabled = regulator_is_enabled_regmap,
 366         .list_voltage = regulator_list_voltage_linear,
 367         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 368         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 369 };
 370
 371 static const struct regulator_ops bd7181x_fixed_regulator_ops = {
 372         .enable = regulator_enable_regmap,
 373         .disable = regulator_disable_regmap,
 374         .is_enabled = regulator_is_enabled_regmap,
 375         .list_voltage = regulator_list_voltage_linear,
 376 };
 377
 378 static const struct regulator_ops bd7181x_buck_regulator_ops = {
 379         .enable = regulator_enable_regmap,
 380         .disable = regulator_disable_regmap,
 381         .is_enabled = regulator_is_enabled_regmap,
 382         .list_voltage = regulator_list_voltage_linear,
 383         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 384         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 385         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 386 };
 387
 388 static const struct regulator_ops bd7181x_buck12_regulator_ops = {
 389         .enable = regulator_enable_regmap,
 390         .disable = regulator_disable_regmap,
 391         .is_enabled = regulator_is_enabled_regmap,
 392         .list_voltage = regulator_list_voltage_linear,
 393         .set_voltage_sel = bd7181x_buck12_set_voltage_sel,
 394         .get_voltage_sel = bd7181x_buck12_get_voltage_sel,
 395         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 396         .set_ramp_delay = regulator_set_ramp_delay_regmap,
 397 };
 398
 399 static const struct regulator_ops bd7181x_led_regulator_ops = {
 400         .enable = regulator_enable_regmap,
 401         .disable = regulator_disable_regmap,
 402         .is_enabled = regulator_is_enabled_regmap,
 403         .set_current_limit = bd7181x_led_set_current_limit,
 404         .get_current_limit = regulator_get_current_limit_regmap,
 405 };
 406
 407 #define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs)        \
 408         [(_id)] = {                                                     \
 409                 .desc = {                                               \
 410                         .name = #_name,                                 \
 411                         .of_match = of_match_ptr(#_name),               \
 412                         .regulators_node = of_match_ptr("regulators"),  \
 413                         .n_voltages = 1,                                \
 414                         .ops = &bd7181x_fixed_regulator_ops,            \
 415                         .type = REGULATOR_VOLTAGE,                      \
 416                         .id = (_id),                                    \
 417                         .owner = THIS_MODULE,                           \
 418                         .min_uV = (voltage),                            \
 419                         .enable_reg = (ereg),                           \
 420                         .enable_mask = (emsk),                          \
 421                         .of_parse_cb = set_hw_dvs_levels,               \
 422                 },                                                      \
 423                 .dvs = (_dvs),                                          \
 424         }
 425
 426 #define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs)  \
 427         [(_id)] = {                                                     \
 428                 .desc = {                                               \
 429                         .name = #_name,                                 \
 430                         .of_match = of_match_ptr(#_name),               \
 431                         .regulators_node = of_match_ptr("regulators"),  \
 432                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 433                         .ops = &bd7181x_buck_regulator_ops,             \
 434                         .type = REGULATOR_VOLTAGE,                      \
 435                         .id = (_id),                                    \
 436                         .owner = THIS_MODULE,                           \
 437                         .min_uV = (min),                                \
 438                         .uV_step = (step),                              \
 439                         .vsel_reg = (vsel),                             \
 440                         .vsel_mask = BD71815_VOLT_MASK,                 \
 441                         .enable_reg = (ereg),                           \
 442                         .enable_mask = BD71815_BUCK_RUN_ON,             \
 443                         .of_parse_cb = set_hw_dvs_levels,               \
 444                 },                                                      \
 445                 .dvs = (_dvs),                                          \
 446         }
 447
 448 #define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step,      \
 449                            _dvs)                                        \
 450         [(_id)] = {                                                     \
 451                 .desc = {                                               \
 452                         .name = #_name,                                 \
 453                         .of_match = of_match_ptr(#_name),               \
 454                         .regulators_node = of_match_ptr("regulators"),  \
 455                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 456                         .ops = &bd7181x_buck12_regulator_ops,           \
 457                         .type = REGULATOR_VOLTAGE,                      \
 458                         .id = (_id),                                    \
 459                         .owner = THIS_MODULE,                           \
 460                         .min_uV = (min),                                \
 461                         .uV_step = (step),                              \
 462                         .vsel_reg = (vsel),                             \
 463                         .vsel_mask = BD71815_VOLT_MASK,                 \
 464                         .enable_reg = (ereg),                           \
 465                         .enable_mask = BD71815_BUCK_RUN_ON,             \
 466                         .ramp_reg = (ereg),                             \
 467                         .ramp_mask = BD71815_BUCK_RAMPRATE_MASK,        \
 468                         .ramp_delay_table = bd7181x_ramp_table,         \
 469                         .n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\
 470                         .of_parse_cb = buck12_set_hw_dvs_levels,        \
 471                 },                                                      \
 472                 .dvs = (_dvs),                                          \
 473         }
 474
 475 #define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents)   \
 476         [(_id)] = {                                                     \
 477                 .desc = {                                               \
 478                         .name = #_name,                                 \
 479                         .of_match = of_match_ptr(#_name),               \
 480                         .regulators_node = of_match_ptr("regulators"),  \
 481                         .n_current_limits = ARRAY_SIZE(currents),       \
 482                         .ops = &bd7181x_led_regulator_ops,              \
 483                         .type = REGULATOR_CURRENT,                      \
 484                         .id = (_id),                                    \
 485                         .owner = THIS_MODULE,                           \
 486                         .curr_table = currents,                         \
 487                         .csel_reg = (csel),                             \
 488                         .csel_mask = (mask),                            \
 489                         .enable_reg = (ereg),                           \
 490                         .enable_mask = (emsk),                          \
 491                 },                                                      \
 492         }
 493
 494 #define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step,   \
 495                         _dvs)                                           \
 496         [(_id)] = {                                                     \
 497                 .desc = {                                               \
 498                         .name = #_name,                                 \
 499                         .of_match = of_match_ptr(#_name),               \
 500                         .regulators_node = of_match_ptr("regulators"),  \
 501                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 502                         .ops = &bd7181x_ldo_regulator_ops,              \
 503                         .type = REGULATOR_VOLTAGE,                      \
 504                         .id = (_id),                                    \
 505                         .owner = THIS_MODULE,                           \
 506                         .min_uV = (min),                                \
 507                         .uV_step = (step),                              \
 508                         .vsel_reg = (vsel),                             \
 509                         .vsel_mask = BD71815_VOLT_MASK,                 \
 510                         .enable_reg = (ereg),                           \
 511                         .enable_mask = (emsk),                          \
 512                         .of_parse_cb = set_hw_dvs_levels,               \
 513                 },                                                      \
 514                 .dvs = (_dvs),                                          \
 515         }
 516
 517 static const struct bd71815_regulator bd71815_regulators[] = {
 518         BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H,
 519                            BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000,
 520                            &buck1_dvs),
 521         BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H,
 522                            BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000,
 523                            &buck2_dvs),
 524         BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT,
 525                          BD71815_REG_BUCK3_MODE,  1200000, 2700000, 50000,
 526                          &buck3_dvs),
 527         BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT,
 528                          BD71815_REG_BUCK4_MODE,  1100000, 1850000, 25000,
 529                          &buck4_dvs),
 530         BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT,
 531                          BD71815_REG_BUCK5_MODE,  1800000, 3300000, 50000,
 532                          &buck5_dvs),
 533         BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT,
 534                         BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000,
 535                         50000, &ldo1_dvs),
 536         BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT,
 537                         BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000,
 538                         50000, &ldo2_dvs),
 539         /*
 540          * Let's default LDO3 to be enabled by SW. We can override ops if DT
 541          * says LDO3 should be enabled by HW when DCIN is connected.
 542          */
 543         BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT,
 544                         BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000,
 545                         50000, &ldo3_dvs),
 546         BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT,
 547                         BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000,
 548                         50000, &ldo4_dvs),
 549         BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H,
 550                         BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000,
 551                         50000, &ldo5_dvs),
 552         BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4,
 553                           DVREF_RUN_ON, 3000000, &dvref_dvs),
 554         BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4,
 555                           LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs),
 556         BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK,
 557                         BD71815_REG_LED_CTRL, LED_RUN_ON,
 558                         bd7181x_wled_currents),
 559 };
 560
 561 static int bd7181x_probe(struct platform_device *pdev)
 562 {
 563         struct regulator_config config = {};
 564         int i, ret;
 565         struct gpio_desc *ldo4_en;
 566         struct regmap *regmap;
 567
 568         regmap = dev_get_regmap(pdev->dev.parent, NULL);
 569         if (!regmap) {
 570                 dev_err(&pdev->dev, "No parent regmap\n");
 571                 return -ENODEV;
 572         }
 573
 574         ldo4_en = devm_fwnode_gpiod_get(&pdev->dev,
 575                                         dev_fwnode(pdev->dev.parent),
 576                                         "rohm,vsel", GPIOD_ASIS, "ldo4-en");
 577         if (IS_ERR(ldo4_en)) {
 578                 ret = PTR_ERR(ldo4_en);
 579                 if (ret != -ENOENT)
 580                         return ret;
 581                 ldo4_en = NULL;
 582         }
 583
 584         /* Disable to go to ship-mode */
 585         ret = regmap_update_bits(regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0);
 586         if (ret)
 587                 return ret;
 588
 589         config.dev = pdev->dev.parent;
 590         config.regmap = regmap;
 591
 592         for (i = 0; i < BD71815_REGULATOR_CNT; i++) {
 593                 const struct regulator_desc *desc;
 594                 struct regulator_dev *rdev;
 595
 596                 desc = &bd71815_regulators[i].desc;
 597
 598                 if (i == BD71815_LDO4)
 599                         config.ena_gpiod = ldo4_en;
 600                 else
 601                         config.ena_gpiod = NULL;
 602
 603                 rdev = devm_regulator_register(&pdev->dev, desc, &config);
 604                 if (IS_ERR(rdev))
 605                         return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
 606                                              "failed to register %s regulator\n",
 607                                              desc->name);
 608         }
 609         return 0;
 610 }
 611
 612 static const struct platform_device_id bd7181x_pmic_id[] = {
 613         { "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 },
 614         { },
 615 };
 616 MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id);
 617
 618 static struct platform_driver bd7181x_regulator = {
 619         .driver = {
 620                 .name = "bd7181x-pmic",
 621                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 622         },
 623         .probe = bd7181x_probe,
 624         .id_table = bd7181x_pmic_id,
 625 };
 626 module_platform_driver(bd7181x_regulator);
 627
 628 MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>");
 629 MODULE_DESCRIPTION("BD71815 voltage regulator driver");
 630 MODULE_LICENSE("GPL v2");
 631 MODULE_ALIAS("platform:bd7181x-pmic");