drivers/regulator/pca9450-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright 2020 NXP.
   4  * NXP PCA9450 pmic driver
   5  */
   6
   7 #include <linux/err.h>
   8 #include <linux/gpio/consumer.h>
   9 #include <linux/i2c.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/regulator/driver.h>
  16 #include <linux/regulator/machine.h>
  17 #include <linux/regulator/of_regulator.h>
  18 #include <linux/regulator/pca9450.h>
  19
  20 struct pc9450_dvs_config {
  21         unsigned int run_reg; /* dvs0 */
  22         unsigned int run_mask;
  23         unsigned int standby_reg; /* dvs1 */
  24         unsigned int standby_mask;
  25 };
  26
  27 struct pca9450_regulator_desc {
  28         struct regulator_desc desc;
  29         const struct pc9450_dvs_config dvs;
  30 };
  31
  32 struct pca9450 {
  33         struct device *dev;
  34         struct regmap *regmap;
  35         struct gpio_desc *sd_vsel_gpio;
  36         enum pca9450_chip_type type;
  37         unsigned int rcnt;
  38         int irq;
  39 };
  40
  41 static const struct regmap_range pca9450_status_range = {
  42         .range_min = PCA9450_REG_INT1,
  43         .range_max = PCA9450_REG_PWRON_STAT,
  44 };
  45
  46 static const struct regmap_access_table pca9450_volatile_regs = {
  47         .yes_ranges = &pca9450_status_range,
  48         .n_yes_ranges = 1,
  49 };
  50
  51 static const struct regmap_config pca9450_regmap_config = {
  52         .reg_bits = 8,
  53         .val_bits = 8,
  54         .volatile_table = &pca9450_volatile_regs,
  55         .max_register = PCA9450_MAX_REGISTER - 1,
  56         .cache_type = REGCACHE_RBTREE,
  57 };
  58
  59 /*
  60  * BUCK1/2/3
  61  * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
  62  * 00: 25mV/1usec
  63  * 01: 25mV/2usec
  64  * 10: 25mV/4usec
  65  * 11: 25mV/8usec
  66  */
  67 static const unsigned int pca9450_dvs_buck_ramp_table[] = {
  68         25000, 12500, 6250, 3125
  69 };
  70
  71 static const struct regulator_ops pca9450_dvs_buck_regulator_ops = {
  72         .enable = regulator_enable_regmap,
  73         .disable = regulator_disable_regmap,
  74         .is_enabled = regulator_is_enabled_regmap,
  75         .list_voltage = regulator_list_voltage_linear_range,
  76         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  77         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  78         .set_voltage_time_sel = regulator_set_voltage_time_sel,
  79         .set_ramp_delay = regulator_set_ramp_delay_regmap,
  80 };
  81
  82 static const struct regulator_ops pca9450_buck_regulator_ops = {
  83         .enable = regulator_enable_regmap,
  84         .disable = regulator_disable_regmap,
  85         .is_enabled = regulator_is_enabled_regmap,
  86         .list_voltage = regulator_list_voltage_linear_range,
  87         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  88         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  89         .set_voltage_time_sel = regulator_set_voltage_time_sel,
  90 };
  91
  92 static const struct regulator_ops pca9450_ldo_regulator_ops = {
  93         .enable = regulator_enable_regmap,
  94         .disable = regulator_disable_regmap,
  95         .is_enabled = regulator_is_enabled_regmap,
  96         .list_voltage = regulator_list_voltage_linear_range,
  97         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  98         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  99 };
 100
 101 /*
 102  * BUCK1/2/3
 103  * 0.60 to 2.1875V (12.5mV step)
 104  */
 105 static const struct linear_range pca9450_dvs_buck_volts[] = {
 106         REGULATOR_LINEAR_RANGE(600000,  0x00, 0x7F, 12500),
 107 };
 108
 109 /*
 110  * BUCK4/5/6
 111  * 0.6V to 3.4V (25mV step)
 112  */
 113 static const struct linear_range pca9450_buck_volts[] = {
 114         REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
 115         REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
 116 };
 117
 118 /*
 119  * LDO1
 120  * 1.6 to 3.3V ()
 121  */
 122 static const struct linear_range pca9450_ldo1_volts[] = {
 123         REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
 124         REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
 125 };
 126
 127 /*
 128  * LDO2
 129  * 0.8 to 1.15V (50mV step)
 130  */
 131 static const struct linear_range pca9450_ldo2_volts[] = {
 132         REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
 133 };
 134
 135 /*
 136  * LDO3/4
 137  * 0.8 to 3.3V (100mV step)
 138  */
 139 static const struct linear_range pca9450_ldo34_volts[] = {
 140         REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
 141         REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
 142 };
 143
 144 /*
 145  * LDO5
 146  * 1.8 to 3.3V (100mV step)
 147  */
 148 static const struct linear_range pca9450_ldo5_volts[] = {
 149         REGULATOR_LINEAR_RANGE(1800000,  0x00, 0x0F, 100000),
 150 };
 151
 152 static int buck_set_dvs(const struct regulator_desc *desc,
 153                         struct device_node *np, struct regmap *regmap,
 154                         char *prop, unsigned int reg, unsigned int mask)
 155 {
 156         int ret, i;
 157         uint32_t uv;
 158
 159         ret = of_property_read_u32(np, prop, &uv);
 160         if (ret == -EINVAL)
 161                 return 0;
 162         else if (ret)
 163                 return ret;
 164
 165         for (i = 0; i < desc->n_voltages; i++) {
 166                 ret = regulator_desc_list_voltage_linear_range(desc, i);
 167                 if (ret < 0)
 168                         continue;
 169                 if (ret == uv) {
 170                         i <<= ffs(desc->vsel_mask) - 1;
 171                         ret = regmap_update_bits(regmap, reg, mask, i);
 172                         break;
 173                 }
 174         }
 175
 176         if (ret == 0) {
 177                 struct pca9450_regulator_desc *regulator = container_of(desc,
 178                                         struct pca9450_regulator_desc, desc);
 179
 180                 /* Enable DVS control through PMIC_STBY_REQ for this BUCK */
 181                 ret = regmap_update_bits(regmap, regulator->desc.enable_reg,
 182                                          BUCK1_DVS_CTRL, BUCK1_DVS_CTRL);
 183         }
 184         return ret;
 185 }
 186
 187 static int pca9450_set_dvs_levels(struct device_node *np,
 188                             const struct regulator_desc *desc,
 189                             struct regulator_config *cfg)
 190 {
 191         struct pca9450_regulator_desc *data = container_of(desc,
 192                                         struct pca9450_regulator_desc, desc);
 193         const struct pc9450_dvs_config *dvs = &data->dvs;
 194         unsigned int reg, mask;
 195         char *prop;
 196         int i, ret = 0;
 197
 198         for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
 199                 switch (i) {
 200                 case PCA9450_DVS_LEVEL_RUN:
 201                         prop = "nxp,dvs-run-voltage";
 202                         reg = dvs->run_reg;
 203                         mask = dvs->run_mask;
 204                         break;
 205                 case PCA9450_DVS_LEVEL_STANDBY:
 206                         prop = "nxp,dvs-standby-voltage";
 207                         reg = dvs->standby_reg;
 208                         mask = dvs->standby_mask;
 209                         break;
 210                 default:
 211                         return -EINVAL;
 212                 }
 213
 214                 ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
 215                 if (ret)
 216                         break;
 217         }
 218
 219         return ret;
 220 }
 221
 222 static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 223         {
 224                 .desc = {
 225                         .name = "buck1",
 226                         .of_match = of_match_ptr("BUCK1"),
 227                         .regulators_node = of_match_ptr("regulators"),
 228                         .id = PCA9450_BUCK1,
 229                         .ops = &pca9450_dvs_buck_regulator_ops,
 230                         .type = REGULATOR_VOLTAGE,
 231                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 232                         .linear_ranges = pca9450_dvs_buck_volts,
 233                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 234                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 235                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 236                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 237                         .enable_mask = BUCK1_ENMODE_MASK,
 238                         .ramp_reg = PCA9450_REG_BUCK1CTRL,
 239                         .ramp_mask = BUCK1_RAMP_MASK,
 240                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 241                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 242                         .owner = THIS_MODULE,
 243                         .of_parse_cb = pca9450_set_dvs_levels,
 244                 },
 245                 .dvs = {
 246                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 247                         .run_mask = BUCK1OUT_DVS0_MASK,
 248                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 249                         .standby_mask = BUCK1OUT_DVS1_MASK,
 250                 },
 251         },
 252         {
 253                 .desc = {
 254                         .name = "buck2",
 255                         .of_match = of_match_ptr("BUCK2"),
 256                         .regulators_node = of_match_ptr("regulators"),
 257                         .id = PCA9450_BUCK2,
 258                         .ops = &pca9450_dvs_buck_regulator_ops,
 259                         .type = REGULATOR_VOLTAGE,
 260                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 261                         .linear_ranges = pca9450_dvs_buck_volts,
 262                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 263                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 264                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 265                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 266                         .enable_mask = BUCK2_ENMODE_MASK,
 267                         .ramp_reg = PCA9450_REG_BUCK2CTRL,
 268                         .ramp_mask = BUCK2_RAMP_MASK,
 269                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 270                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 271                         .owner = THIS_MODULE,
 272                         .of_parse_cb = pca9450_set_dvs_levels,
 273                 },
 274                 .dvs = {
 275                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 276                         .run_mask = BUCK2OUT_DVS0_MASK,
 277                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 278                         .standby_mask = BUCK2OUT_DVS1_MASK,
 279                 },
 280         },
 281         {
 282                 .desc = {
 283                         .name = "buck3",
 284                         .of_match = of_match_ptr("BUCK3"),
 285                         .regulators_node = of_match_ptr("regulators"),
 286                         .id = PCA9450_BUCK3,
 287                         .ops = &pca9450_dvs_buck_regulator_ops,
 288                         .type = REGULATOR_VOLTAGE,
 289                         .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
 290                         .linear_ranges = pca9450_dvs_buck_volts,
 291                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 292                         .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
 293                         .vsel_mask = BUCK3OUT_DVS0_MASK,
 294                         .enable_reg = PCA9450_REG_BUCK3CTRL,
 295                         .enable_mask = BUCK3_ENMODE_MASK,
 296                         .ramp_reg = PCA9450_REG_BUCK3CTRL,
 297                         .ramp_mask = BUCK3_RAMP_MASK,
 298                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 299                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 300                         .owner = THIS_MODULE,
 301                         .of_parse_cb = pca9450_set_dvs_levels,
 302                 },
 303                 .dvs = {
 304                         .run_reg = PCA9450_REG_BUCK3OUT_DVS0,
 305                         .run_mask = BUCK3OUT_DVS0_MASK,
 306                         .standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
 307                         .standby_mask = BUCK3OUT_DVS1_MASK,
 308                 },
 309         },
 310         {
 311                 .desc = {
 312                         .name = "buck4",
 313                         .of_match = of_match_ptr("BUCK4"),
 314                         .regulators_node = of_match_ptr("regulators"),
 315                         .id = PCA9450_BUCK4,
 316                         .ops = &pca9450_buck_regulator_ops,
 317                         .type = REGULATOR_VOLTAGE,
 318                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 319                         .linear_ranges = pca9450_buck_volts,
 320                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 321                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 322                         .vsel_mask = BUCK4OUT_MASK,
 323                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 324                         .enable_mask = BUCK4_ENMODE_MASK,
 325                         .owner = THIS_MODULE,
 326                 },
 327         },
 328         {
 329                 .desc = {
 330                         .name = "buck5",
 331                         .of_match = of_match_ptr("BUCK5"),
 332                         .regulators_node = of_match_ptr("regulators"),
 333                         .id = PCA9450_BUCK5,
 334                         .ops = &pca9450_buck_regulator_ops,
 335                         .type = REGULATOR_VOLTAGE,
 336                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 337                         .linear_ranges = pca9450_buck_volts,
 338                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 339                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 340                         .vsel_mask = BUCK5OUT_MASK,
 341                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 342                         .enable_mask = BUCK5_ENMODE_MASK,
 343                         .owner = THIS_MODULE,
 344                 },
 345         },
 346         {
 347                 .desc = {
 348                         .name = "buck6",
 349                         .of_match = of_match_ptr("BUCK6"),
 350                         .regulators_node = of_match_ptr("regulators"),
 351                         .id = PCA9450_BUCK6,
 352                         .ops = &pca9450_buck_regulator_ops,
 353                         .type = REGULATOR_VOLTAGE,
 354                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 355                         .linear_ranges = pca9450_buck_volts,
 356                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 357                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 358                         .vsel_mask = BUCK6OUT_MASK,
 359                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 360                         .enable_mask = BUCK6_ENMODE_MASK,
 361                         .owner = THIS_MODULE,
 362                 },
 363         },
 364         {
 365                 .desc = {
 366                         .name = "ldo1",
 367                         .of_match = of_match_ptr("LDO1"),
 368                         .regulators_node = of_match_ptr("regulators"),
 369                         .id = PCA9450_LDO1,
 370                         .ops = &pca9450_ldo_regulator_ops,
 371                         .type = REGULATOR_VOLTAGE,
 372                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 373                         .linear_ranges = pca9450_ldo1_volts,
 374                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 375                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 376                         .vsel_mask = LDO1OUT_MASK,
 377                         .enable_reg = PCA9450_REG_LDO1CTRL,
 378                         .enable_mask = LDO1_EN_MASK,
 379                         .owner = THIS_MODULE,
 380                 },
 381         },
 382         {
 383                 .desc = {
 384                         .name = "ldo2",
 385                         .of_match = of_match_ptr("LDO2"),
 386                         .regulators_node = of_match_ptr("regulators"),
 387                         .id = PCA9450_LDO2,
 388                         .ops = &pca9450_ldo_regulator_ops,
 389                         .type = REGULATOR_VOLTAGE,
 390                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 391                         .linear_ranges = pca9450_ldo2_volts,
 392                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 393                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 394                         .vsel_mask = LDO2OUT_MASK,
 395                         .enable_reg = PCA9450_REG_LDO2CTRL,
 396                         .enable_mask = LDO2_EN_MASK,
 397                         .owner = THIS_MODULE,
 398                 },
 399         },
 400         {
 401                 .desc = {
 402                         .name = "ldo3",
 403                         .of_match = of_match_ptr("LDO3"),
 404                         .regulators_node = of_match_ptr("regulators"),
 405                         .id = PCA9450_LDO3,
 406                         .ops = &pca9450_ldo_regulator_ops,
 407                         .type = REGULATOR_VOLTAGE,
 408                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 409                         .linear_ranges = pca9450_ldo34_volts,
 410                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 411                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 412                         .vsel_mask = LDO3OUT_MASK,
 413                         .enable_reg = PCA9450_REG_LDO3CTRL,
 414                         .enable_mask = LDO3_EN_MASK,
 415                         .owner = THIS_MODULE,
 416                 },
 417         },
 418         {
 419                 .desc = {
 420                         .name = "ldo4",
 421                         .of_match = of_match_ptr("LDO4"),
 422                         .regulators_node = of_match_ptr("regulators"),
 423                         .id = PCA9450_LDO4,
 424                         .ops = &pca9450_ldo_regulator_ops,
 425                         .type = REGULATOR_VOLTAGE,
 426                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 427                         .linear_ranges = pca9450_ldo34_volts,
 428                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 429                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 430                         .vsel_mask = LDO4OUT_MASK,
 431                         .enable_reg = PCA9450_REG_LDO4CTRL,
 432                         .enable_mask = LDO4_EN_MASK,
 433                         .owner = THIS_MODULE,
 434                 },
 435         },
 436         {
 437                 .desc = {
 438                         .name = "ldo5",
 439                         .of_match = of_match_ptr("LDO5"),
 440                         .regulators_node = of_match_ptr("regulators"),
 441                         .id = PCA9450_LDO5,
 442                         .ops = &pca9450_ldo_regulator_ops,
 443                         .type = REGULATOR_VOLTAGE,
 444                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 445                         .linear_ranges = pca9450_ldo5_volts,
 446                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 447                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 448                         .vsel_mask = LDO5HOUT_MASK,
 449                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 450                         .enable_mask = LDO5H_EN_MASK,
 451                         .owner = THIS_MODULE,
 452                 },
 453         },
 454 };
 455
 456 /*
 457  * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
 458  * on PCA9450C as no Buck3.
 459  */
 460 static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 461         {
 462                 .desc = {
 463                         .name = "buck1",
 464                         .of_match = of_match_ptr("BUCK1"),
 465                         .regulators_node = of_match_ptr("regulators"),
 466                         .id = PCA9450_BUCK1,
 467                         .ops = &pca9450_dvs_buck_regulator_ops,
 468                         .type = REGULATOR_VOLTAGE,
 469                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 470                         .linear_ranges = pca9450_dvs_buck_volts,
 471                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 472                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 473                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 474                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 475                         .enable_mask = BUCK1_ENMODE_MASK,
 476                         .ramp_reg = PCA9450_REG_BUCK1CTRL,
 477                         .ramp_mask = BUCK1_RAMP_MASK,
 478                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 479                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 480                         .owner = THIS_MODULE,
 481                         .of_parse_cb = pca9450_set_dvs_levels,
 482                 },
 483                 .dvs = {
 484                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 485                         .run_mask = BUCK1OUT_DVS0_MASK,
 486                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 487                         .standby_mask = BUCK1OUT_DVS1_MASK,
 488                 },
 489         },
 490         {
 491                 .desc = {
 492                         .name = "buck2",
 493                         .of_match = of_match_ptr("BUCK2"),
 494                         .regulators_node = of_match_ptr("regulators"),
 495                         .id = PCA9450_BUCK2,
 496                         .ops = &pca9450_dvs_buck_regulator_ops,
 497                         .type = REGULATOR_VOLTAGE,
 498                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 499                         .linear_ranges = pca9450_dvs_buck_volts,
 500                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 501                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 502                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 503                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 504                         .enable_mask = BUCK2_ENMODE_MASK,
 505                         .ramp_reg = PCA9450_REG_BUCK2CTRL,
 506                         .ramp_mask = BUCK2_RAMP_MASK,
 507                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 508                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 509                         .owner = THIS_MODULE,
 510                         .of_parse_cb = pca9450_set_dvs_levels,
 511                 },
 512                 .dvs = {
 513                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 514                         .run_mask = BUCK2OUT_DVS0_MASK,
 515                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 516                         .standby_mask = BUCK2OUT_DVS1_MASK,
 517                 },
 518         },
 519         {
 520                 .desc = {
 521                         .name = "buck4",
 522                         .of_match = of_match_ptr("BUCK4"),
 523                         .regulators_node = of_match_ptr("regulators"),
 524                         .id = PCA9450_BUCK4,
 525                         .ops = &pca9450_buck_regulator_ops,
 526                         .type = REGULATOR_VOLTAGE,
 527                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 528                         .linear_ranges = pca9450_buck_volts,
 529                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 530                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 531                         .vsel_mask = BUCK4OUT_MASK,
 532                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 533                         .enable_mask = BUCK4_ENMODE_MASK,
 534                         .owner = THIS_MODULE,
 535                 },
 536         },
 537         {
 538                 .desc = {
 539                         .name = "buck5",
 540                         .of_match = of_match_ptr("BUCK5"),
 541                         .regulators_node = of_match_ptr("regulators"),
 542                         .id = PCA9450_BUCK5,
 543                         .ops = &pca9450_buck_regulator_ops,
 544                         .type = REGULATOR_VOLTAGE,
 545                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 546                         .linear_ranges = pca9450_buck_volts,
 547                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 548                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 549                         .vsel_mask = BUCK5OUT_MASK,
 550                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 551                         .enable_mask = BUCK5_ENMODE_MASK,
 552                         .owner = THIS_MODULE,
 553                 },
 554         },
 555         {
 556                 .desc = {
 557                         .name = "buck6",
 558                         .of_match = of_match_ptr("BUCK6"),
 559                         .regulators_node = of_match_ptr("regulators"),
 560                         .id = PCA9450_BUCK6,
 561                         .ops = &pca9450_buck_regulator_ops,
 562                         .type = REGULATOR_VOLTAGE,
 563                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 564                         .linear_ranges = pca9450_buck_volts,
 565                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 566                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 567                         .vsel_mask = BUCK6OUT_MASK,
 568                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 569                         .enable_mask = BUCK6_ENMODE_MASK,
 570                         .owner = THIS_MODULE,
 571                 },
 572         },
 573         {
 574                 .desc = {
 575                         .name = "ldo1",
 576                         .of_match = of_match_ptr("LDO1"),
 577                         .regulators_node = of_match_ptr("regulators"),
 578                         .id = PCA9450_LDO1,
 579                         .ops = &pca9450_ldo_regulator_ops,
 580                         .type = REGULATOR_VOLTAGE,
 581                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 582                         .linear_ranges = pca9450_ldo1_volts,
 583                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 584                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 585                         .vsel_mask = LDO1OUT_MASK,
 586                         .enable_reg = PCA9450_REG_LDO1CTRL,
 587                         .enable_mask = LDO1_EN_MASK,
 588                         .owner = THIS_MODULE,
 589                 },
 590         },
 591         {
 592                 .desc = {
 593                         .name = "ldo2",
 594                         .of_match = of_match_ptr("LDO2"),
 595                         .regulators_node = of_match_ptr("regulators"),
 596                         .id = PCA9450_LDO2,
 597                         .ops = &pca9450_ldo_regulator_ops,
 598                         .type = REGULATOR_VOLTAGE,
 599                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 600                         .linear_ranges = pca9450_ldo2_volts,
 601                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 602                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 603                         .vsel_mask = LDO2OUT_MASK,
 604                         .enable_reg = PCA9450_REG_LDO2CTRL,
 605                         .enable_mask = LDO2_EN_MASK,
 606                         .owner = THIS_MODULE,
 607                 },
 608         },
 609         {
 610                 .desc = {
 611                         .name = "ldo3",
 612                         .of_match = of_match_ptr("LDO3"),
 613                         .regulators_node = of_match_ptr("regulators"),
 614                         .id = PCA9450_LDO3,
 615                         .ops = &pca9450_ldo_regulator_ops,
 616                         .type = REGULATOR_VOLTAGE,
 617                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 618                         .linear_ranges = pca9450_ldo34_volts,
 619                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 620                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 621                         .vsel_mask = LDO3OUT_MASK,
 622                         .enable_reg = PCA9450_REG_LDO3CTRL,
 623                         .enable_mask = LDO3_EN_MASK,
 624                         .owner = THIS_MODULE,
 625                 },
 626         },
 627         {
 628                 .desc = {
 629                         .name = "ldo4",
 630                         .of_match = of_match_ptr("LDO4"),
 631                         .regulators_node = of_match_ptr("regulators"),
 632                         .id = PCA9450_LDO4,
 633                         .ops = &pca9450_ldo_regulator_ops,
 634                         .type = REGULATOR_VOLTAGE,
 635                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 636                         .linear_ranges = pca9450_ldo34_volts,
 637                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 638                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 639                         .vsel_mask = LDO4OUT_MASK,
 640                         .enable_reg = PCA9450_REG_LDO4CTRL,
 641                         .enable_mask = LDO4_EN_MASK,
 642                         .owner = THIS_MODULE,
 643                 },
 644         },
 645         {
 646                 .desc = {
 647                         .name = "ldo5",
 648                         .of_match = of_match_ptr("LDO5"),
 649                         .regulators_node = of_match_ptr("regulators"),
 650                         .id = PCA9450_LDO5,
 651                         .ops = &pca9450_ldo_regulator_ops,
 652                         .type = REGULATOR_VOLTAGE,
 653                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 654                         .linear_ranges = pca9450_ldo5_volts,
 655                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 656                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 657                         .vsel_mask = LDO5HOUT_MASK,
 658                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 659                         .enable_mask = LDO5H_EN_MASK,
 660                         .owner = THIS_MODULE,
 661                 },
 662         },
 663 };
 664
 665 static irqreturn_t pca9450_irq_handler(int irq, void *data)
 666 {
 667         struct pca9450 *pca9450 = data;
 668         struct regmap *regmap = pca9450->regmap;
 669         unsigned int status;
 670         int ret;
 671
 672         ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
 673         if (ret < 0) {
 674                 dev_err(pca9450->dev,
 675                         "Failed to read INT1(%d)\n", ret);
 676                 return IRQ_NONE;
 677         }
 678
 679         if (status & IRQ_PWRON)
 680                 dev_warn(pca9450->dev, "PWRON interrupt.\n");
 681
 682         if (status & IRQ_WDOGB)
 683                 dev_warn(pca9450->dev, "WDOGB interrupt.\n");
 684
 685         if (status & IRQ_VR_FLT1)
 686                 dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
 687
 688         if (status & IRQ_VR_FLT2)
 689                 dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
 690
 691         if (status & IRQ_LOWVSYS)
 692                 dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
 693
 694         if (status & IRQ_THERM_105)
 695                 dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
 696
 697         if (status & IRQ_THERM_125)
 698                 dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
 699
 700         return IRQ_HANDLED;
 701 }
 702
 703 static int pca9450_i2c_probe(struct i2c_client *i2c)
 704 {
 705         enum pca9450_chip_type type = (unsigned int)(uintptr_t)
 706                                       of_device_get_match_data(&i2c->dev);
 707         const struct pca9450_regulator_desc     *regulator_desc;
 708         struct regulator_config config = { };
 709         struct pca9450 *pca9450;
 710         unsigned int device_id, i;
 711         unsigned int reset_ctrl;
 712         int ret;
 713
 714         if (!i2c->irq) {
 715                 dev_err(&i2c->dev, "No IRQ configured?\n");
 716                 return -EINVAL;
 717         }
 718
 719         pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
 720         if (!pca9450)
 721                 return -ENOMEM;
 722
 723         switch (type) {
 724         case PCA9450_TYPE_PCA9450A:
 725                 regulator_desc = pca9450a_regulators;
 726                 pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
 727                 break;
 728         case PCA9450_TYPE_PCA9450BC:
 729                 regulator_desc = pca9450bc_regulators;
 730                 pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
 731                 break;
 732         default:
 733                 dev_err(&i2c->dev, "Unknown device type");
 734                 return -EINVAL;
 735         }
 736
 737         pca9450->irq = i2c->irq;
 738         pca9450->type = type;
 739         pca9450->dev = &i2c->dev;
 740
 741         dev_set_drvdata(&i2c->dev, pca9450);
 742
 743         pca9450->regmap = devm_regmap_init_i2c(i2c,
 744                                                &pca9450_regmap_config);
 745         if (IS_ERR(pca9450->regmap)) {
 746                 dev_err(&i2c->dev, "regmap initialization failed\n");
 747                 return PTR_ERR(pca9450->regmap);
 748         }
 749
 750         ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
 751         if (ret) {
 752                 dev_err(&i2c->dev, "Read device id error\n");
 753                 return ret;
 754         }
 755
 756         /* Check your board and dts for match the right pmic */
 757         if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
 758             ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
 759                 dev_err(&i2c->dev, "Device id(%x) mismatched\n",
 760                         device_id >> 4);
 761                 return -EINVAL;
 762         }
 763
 764         for (i = 0; i < pca9450->rcnt; i++) {
 765                 const struct regulator_desc *desc;
 766                 struct regulator_dev *rdev;
 767                 const struct pca9450_regulator_desc *r;
 768
 769                 r = &regulator_desc[i];
 770                 desc = &r->desc;
 771
 772                 config.regmap = pca9450->regmap;
 773                 config.dev = pca9450->dev;
 774
 775                 rdev = devm_regulator_register(pca9450->dev, desc, &config);
 776                 if (IS_ERR(rdev)) {
 777                         ret = PTR_ERR(rdev);
 778                         dev_err(pca9450->dev,
 779                                 "Failed to register regulator(%s): %d\n",
 780                                 desc->name, ret);
 781                         return ret;
 782                 }
 783         }
 784
 785         ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
 786                                         pca9450_irq_handler,
 787                                         (IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
 788                                         "pca9450-irq", pca9450);
 789         if (ret != 0) {
 790                 dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
 791                         pca9450->irq);
 792                 return ret;
 793         }
 794         /* Unmask all interrupt except PWRON/WDOG/RSVD */
 795         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
 796                                 IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
 797                                 IRQ_THERM_105 | IRQ_THERM_125,
 798                                 IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
 799         if (ret) {
 800                 dev_err(&i2c->dev, "Unmask irq error\n");
 801                 return ret;
 802         }
 803
 804         /* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
 805         ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
 806                                 BUCK123_PRESET_EN);
 807         if (ret) {
 808                 dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret);
 809                 return ret;
 810         }
 811
 812         if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
 813                 reset_ctrl = WDOG_B_CFG_WARM;
 814         else
 815                 reset_ctrl = WDOG_B_CFG_COLD_LDO12;
 816
 817         /* Set reset behavior on assertion of WDOG_B signal */
 818         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
 819                                  WDOG_B_CFG_MASK, reset_ctrl);
 820         if (ret) {
 821                 dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
 822                 return ret;
 823         }
 824
 825         if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) {
 826                 /* Enable I2C Level Translator */
 827                 ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2,
 828                                          I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN);
 829                 if (ret) {
 830                         dev_err(&i2c->dev,
 831                                 "Failed to enable I2C level translator\n");
 832                         return ret;
 833                 }
 834         }
 835
 836         /*
 837          * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
 838          * This is only valid if the SD_VSEL input of the PMIC is high. Let's
 839          * check if the pin is available as GPIO and set it to high.
 840          */
 841         pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
 842
 843         if (IS_ERR(pca9450->sd_vsel_gpio)) {
 844                 dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
 845                 return PTR_ERR(pca9450->sd_vsel_gpio);
 846         }
 847
 848         dev_info(&i2c->dev, "%s probed.\n",
 849                 type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
 850
 851         return 0;
 852 }
 853
 854 static const struct of_device_id pca9450_of_match[] = {
 855         {
 856                 .compatible = "nxp,pca9450a",
 857                 .data = (void *)PCA9450_TYPE_PCA9450A,
 858         },
 859         {
 860                 .compatible = "nxp,pca9450b",
 861                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 862         },
 863         {
 864                 .compatible = "nxp,pca9450c",
 865                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 866         },
 867         { }
 868 };
 869 MODULE_DEVICE_TABLE(of, pca9450_of_match);
 870
 871 static struct i2c_driver pca9450_i2c_driver = {
 872         .driver = {
 873                 .name = "nxp-pca9450",
 874                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 875                 .of_match_table = pca9450_of_match,
 876         },
 877         .probe = pca9450_i2c_probe,
 878 };
 879
 880 module_i2c_driver(pca9450_i2c_driver);
 881
 882 MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
 883 MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
 884 MODULE_LICENSE("GPL");