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