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/of_device.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/machine.h>
  18 #include <linux/regulator/of_regulator.h>
  19 #include <linux/regulator/pca9450.h>
  20
  21 struct pc9450_dvs_config {
  22         unsigned int run_reg; /* dvs0 */
  23         unsigned int run_mask;
  24         unsigned int standby_reg; /* dvs1 */
  25         unsigned int standby_mask;
  26 };
  27
  28 struct pca9450_regulator_desc {
  29         struct regulator_desc desc;
  30         const struct pc9450_dvs_config dvs;
  31 };
  32
  33 struct pca9450 {
  34         struct device *dev;
  35         struct regmap *regmap;
  36         struct gpio_desc *sd_vsel_gpio;
  37         enum pca9450_chip_type type;
  38         unsigned int rcnt;
  39         int irq;
  40 };
  41
  42 static const struct regmap_range pca9450_status_range = {
  43         .range_min = PCA9450_REG_INT1,
  44         .range_max = PCA9450_REG_PWRON_STAT,
  45 };
  46
  47 static const struct regmap_access_table pca9450_volatile_regs = {
  48         .yes_ranges = &pca9450_status_range,
  49         .n_yes_ranges = 1,
  50 };
  51
  52 static const struct regmap_config pca9450_regmap_config = {
  53         .reg_bits = 8,
  54         .val_bits = 8,
  55         .volatile_table = &pca9450_volatile_regs,
  56         .max_register = PCA9450_MAX_REGISTER - 1,
  57         .cache_type = REGCACHE_RBTREE,
  58 };
  59
  60 /*
  61  * BUCK1/2/3
  62  * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
  63  * 00: 25mV/1usec
  64  * 01: 25mV/2usec
  65  * 10: 25mV/4usec
  66  * 11: 25mV/8usec
  67  */
  68 static const unsigned int pca9450_dvs_buck_ramp_table[] = {
  69         25000, 12500, 6250, 3125
  70 };
  71
  72 static const struct regulator_ops pca9450_dvs_buck_regulator_ops = {
  73         .enable = regulator_enable_regmap,
  74         .disable = regulator_disable_regmap,
  75         .is_enabled = regulator_is_enabled_regmap,
  76         .list_voltage = regulator_list_voltage_linear_range,
  77         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  78         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  79         .set_voltage_time_sel = regulator_set_voltage_time_sel,
  80         .set_ramp_delay = regulator_set_ramp_delay_regmap,
  81 };
  82
  83 static const struct regulator_ops pca9450_buck_regulator_ops = {
  84         .enable = regulator_enable_regmap,
  85         .disable = regulator_disable_regmap,
  86         .is_enabled = regulator_is_enabled_regmap,
  87         .list_voltage = regulator_list_voltage_linear_range,
  88         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  89         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  90         .set_voltage_time_sel = regulator_set_voltage_time_sel,
  91 };
  92
  93 static const struct regulator_ops pca9450_ldo_regulator_ops = {
  94         .enable = regulator_enable_regmap,
  95         .disable = regulator_disable_regmap,
  96         .is_enabled = regulator_is_enabled_regmap,
  97         .list_voltage = regulator_list_voltage_linear_range,
  98         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  99         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 100 };
 101
 102 /*
 103  * BUCK1/2/3
 104  * 0.60 to 2.1875V (12.5mV step)
 105  */
 106 static const struct linear_range pca9450_dvs_buck_volts[] = {
 107         REGULATOR_LINEAR_RANGE(600000,  0x00, 0x7F, 12500),
 108 };
 109
 110 /*
 111  * BUCK4/5/6
 112  * 0.6V to 3.4V (25mV step)
 113  */
 114 static const struct linear_range pca9450_buck_volts[] = {
 115         REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
 116         REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
 117 };
 118
 119 /*
 120  * LDO1
 121  * 1.6 to 3.3V ()
 122  */
 123 static const struct linear_range pca9450_ldo1_volts[] = {
 124         REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
 125         REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
 126 };
 127
 128 /*
 129  * LDO2
 130  * 0.8 to 1.15V (50mV step)
 131  */
 132 static const struct linear_range pca9450_ldo2_volts[] = {
 133         REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
 134 };
 135
 136 /*
 137  * LDO3/4
 138  * 0.8 to 3.3V (100mV step)
 139  */
 140 static const struct linear_range pca9450_ldo34_volts[] = {
 141         REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
 142         REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
 143 };
 144
 145 /*
 146  * LDO5
 147  * 1.8 to 3.3V (100mV step)
 148  */
 149 static const struct linear_range pca9450_ldo5_volts[] = {
 150         REGULATOR_LINEAR_RANGE(1800000,  0x00, 0x0F, 100000),
 151 };
 152
 153 static int buck_set_dvs(const struct regulator_desc *desc,
 154                         struct device_node *np, struct regmap *regmap,
 155                         char *prop, unsigned int reg, unsigned int mask)
 156 {
 157         int ret, i;
 158         uint32_t uv;
 159
 160         ret = of_property_read_u32(np, prop, &uv);
 161         if (ret == -EINVAL)
 162                 return 0;
 163         else if (ret)
 164                 return ret;
 165
 166         for (i = 0; i < desc->n_voltages; i++) {
 167                 ret = regulator_desc_list_voltage_linear_range(desc, i);
 168                 if (ret < 0)
 169                         continue;
 170                 if (ret == uv) {
 171                         i <<= ffs(desc->vsel_mask) - 1;
 172                         ret = regmap_update_bits(regmap, reg, mask, i);
 173                         break;
 174                 }
 175         }
 176
 177         return ret;
 178 }
 179
 180 static int pca9450_set_dvs_levels(struct device_node *np,
 181                             const struct regulator_desc *desc,
 182                             struct regulator_config *cfg)
 183 {
 184         struct pca9450_regulator_desc *data = container_of(desc,
 185                                         struct pca9450_regulator_desc, desc);
 186         const struct pc9450_dvs_config *dvs = &data->dvs;
 187         unsigned int reg, mask;
 188         char *prop;
 189         int i, ret = 0;
 190
 191         for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
 192                 switch (i) {
 193                 case PCA9450_DVS_LEVEL_RUN:
 194                         prop = "nxp,dvs-run-voltage";
 195                         reg = dvs->run_reg;
 196                         mask = dvs->run_mask;
 197                         break;
 198                 case PCA9450_DVS_LEVEL_STANDBY:
 199                         prop = "nxp,dvs-standby-voltage";
 200                         reg = dvs->standby_reg;
 201                         mask = dvs->standby_mask;
 202                         break;
 203                 default:
 204                         return -EINVAL;
 205                 }
 206
 207                 ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
 208                 if (ret)
 209                         break;
 210         }
 211
 212         return ret;
 213 }
 214
 215 static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 216         {
 217                 .desc = {
 218                         .name = "buck1",
 219                         .of_match = of_match_ptr("BUCK1"),
 220                         .regulators_node = of_match_ptr("regulators"),
 221                         .id = PCA9450_BUCK1,
 222                         .ops = &pca9450_dvs_buck_regulator_ops,
 223                         .type = REGULATOR_VOLTAGE,
 224                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 225                         .linear_ranges = pca9450_dvs_buck_volts,
 226                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 227                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 228                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 229                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 230                         .enable_mask = BUCK1_ENMODE_MASK,
 231                         .ramp_reg = PCA9450_REG_BUCK1CTRL,
 232                         .ramp_mask = BUCK1_RAMP_MASK,
 233                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 234                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 235                         .owner = THIS_MODULE,
 236                         .of_parse_cb = pca9450_set_dvs_levels,
 237                 },
 238                 .dvs = {
 239                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 240                         .run_mask = BUCK1OUT_DVS0_MASK,
 241                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 242                         .standby_mask = BUCK1OUT_DVS1_MASK,
 243                 },
 244         },
 245         {
 246                 .desc = {
 247                         .name = "buck2",
 248                         .of_match = of_match_ptr("BUCK2"),
 249                         .regulators_node = of_match_ptr("regulators"),
 250                         .id = PCA9450_BUCK2,
 251                         .ops = &pca9450_dvs_buck_regulator_ops,
 252                         .type = REGULATOR_VOLTAGE,
 253                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 254                         .linear_ranges = pca9450_dvs_buck_volts,
 255                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 256                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 257                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 258                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 259                         .enable_mask = BUCK1_ENMODE_MASK,
 260                         .ramp_reg = PCA9450_REG_BUCK2CTRL,
 261                         .ramp_mask = BUCK2_RAMP_MASK,
 262                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 263                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 264                         .owner = THIS_MODULE,
 265                         .of_parse_cb = pca9450_set_dvs_levels,
 266                 },
 267                 .dvs = {
 268                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 269                         .run_mask = BUCK2OUT_DVS0_MASK,
 270                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 271                         .standby_mask = BUCK2OUT_DVS1_MASK,
 272                 },
 273         },
 274         {
 275                 .desc = {
 276                         .name = "buck3",
 277                         .of_match = of_match_ptr("BUCK3"),
 278                         .regulators_node = of_match_ptr("regulators"),
 279                         .id = PCA9450_BUCK3,
 280                         .ops = &pca9450_dvs_buck_regulator_ops,
 281                         .type = REGULATOR_VOLTAGE,
 282                         .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
 283                         .linear_ranges = pca9450_dvs_buck_volts,
 284                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 285                         .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
 286                         .vsel_mask = BUCK3OUT_DVS0_MASK,
 287                         .enable_reg = PCA9450_REG_BUCK3CTRL,
 288                         .enable_mask = BUCK3_ENMODE_MASK,
 289                         .ramp_reg = PCA9450_REG_BUCK3CTRL,
 290                         .ramp_mask = BUCK3_RAMP_MASK,
 291                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 292                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 293                         .owner = THIS_MODULE,
 294                         .of_parse_cb = pca9450_set_dvs_levels,
 295                 },
 296                 .dvs = {
 297                         .run_reg = PCA9450_REG_BUCK3OUT_DVS0,
 298                         .run_mask = BUCK3OUT_DVS0_MASK,
 299                         .standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
 300                         .standby_mask = BUCK3OUT_DVS1_MASK,
 301                 },
 302         },
 303         {
 304                 .desc = {
 305                         .name = "buck4",
 306                         .of_match = of_match_ptr("BUCK4"),
 307                         .regulators_node = of_match_ptr("regulators"),
 308                         .id = PCA9450_BUCK4,
 309                         .ops = &pca9450_buck_regulator_ops,
 310                         .type = REGULATOR_VOLTAGE,
 311                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 312                         .linear_ranges = pca9450_buck_volts,
 313                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 314                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 315                         .vsel_mask = BUCK4OUT_MASK,
 316                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 317                         .enable_mask = BUCK4_ENMODE_MASK,
 318                         .owner = THIS_MODULE,
 319                 },
 320         },
 321         {
 322                 .desc = {
 323                         .name = "buck5",
 324                         .of_match = of_match_ptr("BUCK5"),
 325                         .regulators_node = of_match_ptr("regulators"),
 326                         .id = PCA9450_BUCK5,
 327                         .ops = &pca9450_buck_regulator_ops,
 328                         .type = REGULATOR_VOLTAGE,
 329                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 330                         .linear_ranges = pca9450_buck_volts,
 331                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 332                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 333                         .vsel_mask = BUCK5OUT_MASK,
 334                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 335                         .enable_mask = BUCK5_ENMODE_MASK,
 336                         .owner = THIS_MODULE,
 337                 },
 338         },
 339         {
 340                 .desc = {
 341                         .name = "buck6",
 342                         .of_match = of_match_ptr("BUCK6"),
 343                         .regulators_node = of_match_ptr("regulators"),
 344                         .id = PCA9450_BUCK6,
 345                         .ops = &pca9450_buck_regulator_ops,
 346                         .type = REGULATOR_VOLTAGE,
 347                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 348                         .linear_ranges = pca9450_buck_volts,
 349                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 350                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 351                         .vsel_mask = BUCK6OUT_MASK,
 352                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 353                         .enable_mask = BUCK6_ENMODE_MASK,
 354                         .owner = THIS_MODULE,
 355                 },
 356         },
 357         {
 358                 .desc = {
 359                         .name = "ldo1",
 360                         .of_match = of_match_ptr("LDO1"),
 361                         .regulators_node = of_match_ptr("regulators"),
 362                         .id = PCA9450_LDO1,
 363                         .ops = &pca9450_ldo_regulator_ops,
 364                         .type = REGULATOR_VOLTAGE,
 365                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 366                         .linear_ranges = pca9450_ldo1_volts,
 367                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 368                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 369                         .vsel_mask = LDO1OUT_MASK,
 370                         .enable_reg = PCA9450_REG_LDO1CTRL,
 371                         .enable_mask = LDO1_EN_MASK,
 372                         .owner = THIS_MODULE,
 373                 },
 374         },
 375         {
 376                 .desc = {
 377                         .name = "ldo2",
 378                         .of_match = of_match_ptr("LDO2"),
 379                         .regulators_node = of_match_ptr("regulators"),
 380                         .id = PCA9450_LDO2,
 381                         .ops = &pca9450_ldo_regulator_ops,
 382                         .type = REGULATOR_VOLTAGE,
 383                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 384                         .linear_ranges = pca9450_ldo2_volts,
 385                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 386                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 387                         .vsel_mask = LDO2OUT_MASK,
 388                         .enable_reg = PCA9450_REG_LDO2CTRL,
 389                         .enable_mask = LDO2_EN_MASK,
 390                         .owner = THIS_MODULE,
 391                 },
 392         },
 393         {
 394                 .desc = {
 395                         .name = "ldo3",
 396                         .of_match = of_match_ptr("LDO3"),
 397                         .regulators_node = of_match_ptr("regulators"),
 398                         .id = PCA9450_LDO3,
 399                         .ops = &pca9450_ldo_regulator_ops,
 400                         .type = REGULATOR_VOLTAGE,
 401                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 402                         .linear_ranges = pca9450_ldo34_volts,
 403                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 404                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 405                         .vsel_mask = LDO3OUT_MASK,
 406                         .enable_reg = PCA9450_REG_LDO3CTRL,
 407                         .enable_mask = LDO3_EN_MASK,
 408                         .owner = THIS_MODULE,
 409                 },
 410         },
 411         {
 412                 .desc = {
 413                         .name = "ldo4",
 414                         .of_match = of_match_ptr("LDO4"),
 415                         .regulators_node = of_match_ptr("regulators"),
 416                         .id = PCA9450_LDO4,
 417                         .ops = &pca9450_ldo_regulator_ops,
 418                         .type = REGULATOR_VOLTAGE,
 419                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 420                         .linear_ranges = pca9450_ldo34_volts,
 421                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 422                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 423                         .vsel_mask = LDO4OUT_MASK,
 424                         .enable_reg = PCA9450_REG_LDO4CTRL,
 425                         .enable_mask = LDO4_EN_MASK,
 426                         .owner = THIS_MODULE,
 427                 },
 428         },
 429         {
 430                 .desc = {
 431                         .name = "ldo5",
 432                         .of_match = of_match_ptr("LDO5"),
 433                         .regulators_node = of_match_ptr("regulators"),
 434                         .id = PCA9450_LDO5,
 435                         .ops = &pca9450_ldo_regulator_ops,
 436                         .type = REGULATOR_VOLTAGE,
 437                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 438                         .linear_ranges = pca9450_ldo5_volts,
 439                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 440                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 441                         .vsel_mask = LDO5HOUT_MASK,
 442                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 443                         .enable_mask = LDO5H_EN_MASK,
 444                         .owner = THIS_MODULE,
 445                 },
 446         },
 447 };
 448
 449 /*
 450  * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
 451  * on PCA9450C as no Buck3.
 452  */
 453 static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 454         {
 455                 .desc = {
 456                         .name = "buck1",
 457                         .of_match = of_match_ptr("BUCK1"),
 458                         .regulators_node = of_match_ptr("regulators"),
 459                         .id = PCA9450_BUCK1,
 460                         .ops = &pca9450_dvs_buck_regulator_ops,
 461                         .type = REGULATOR_VOLTAGE,
 462                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 463                         .linear_ranges = pca9450_dvs_buck_volts,
 464                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 465                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 466                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 467                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 468                         .enable_mask = BUCK1_ENMODE_MASK,
 469                         .ramp_reg = PCA9450_REG_BUCK1CTRL,
 470                         .ramp_mask = BUCK1_RAMP_MASK,
 471                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 472                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 473                         .owner = THIS_MODULE,
 474                         .of_parse_cb = pca9450_set_dvs_levels,
 475                 },
 476                 .dvs = {
 477                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 478                         .run_mask = BUCK1OUT_DVS0_MASK,
 479                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 480                         .standby_mask = BUCK1OUT_DVS1_MASK,
 481                 },
 482         },
 483         {
 484                 .desc = {
 485                         .name = "buck2",
 486                         .of_match = of_match_ptr("BUCK2"),
 487                         .regulators_node = of_match_ptr("regulators"),
 488                         .id = PCA9450_BUCK2,
 489                         .ops = &pca9450_dvs_buck_regulator_ops,
 490                         .type = REGULATOR_VOLTAGE,
 491                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 492                         .linear_ranges = pca9450_dvs_buck_volts,
 493                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 494                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 495                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 496                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 497                         .enable_mask = BUCK1_ENMODE_MASK,
 498                         .ramp_reg = PCA9450_REG_BUCK2CTRL,
 499                         .ramp_mask = BUCK2_RAMP_MASK,
 500                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 501                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 502                         .owner = THIS_MODULE,
 503                         .of_parse_cb = pca9450_set_dvs_levels,
 504                 },
 505                 .dvs = {
 506                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 507                         .run_mask = BUCK2OUT_DVS0_MASK,
 508                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 509                         .standby_mask = BUCK2OUT_DVS1_MASK,
 510                 },
 511         },
 512         {
 513                 .desc = {
 514                         .name = "buck4",
 515                         .of_match = of_match_ptr("BUCK4"),
 516                         .regulators_node = of_match_ptr("regulators"),
 517                         .id = PCA9450_BUCK4,
 518                         .ops = &pca9450_buck_regulator_ops,
 519                         .type = REGULATOR_VOLTAGE,
 520                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 521                         .linear_ranges = pca9450_buck_volts,
 522                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 523                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 524                         .vsel_mask = BUCK4OUT_MASK,
 525                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 526                         .enable_mask = BUCK4_ENMODE_MASK,
 527                         .owner = THIS_MODULE,
 528                 },
 529         },
 530         {
 531                 .desc = {
 532                         .name = "buck5",
 533                         .of_match = of_match_ptr("BUCK5"),
 534                         .regulators_node = of_match_ptr("regulators"),
 535                         .id = PCA9450_BUCK5,
 536                         .ops = &pca9450_buck_regulator_ops,
 537                         .type = REGULATOR_VOLTAGE,
 538                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 539                         .linear_ranges = pca9450_buck_volts,
 540                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 541                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 542                         .vsel_mask = BUCK5OUT_MASK,
 543                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 544                         .enable_mask = BUCK5_ENMODE_MASK,
 545                         .owner = THIS_MODULE,
 546                 },
 547         },
 548         {
 549                 .desc = {
 550                         .name = "buck6",
 551                         .of_match = of_match_ptr("BUCK6"),
 552                         .regulators_node = of_match_ptr("regulators"),
 553                         .id = PCA9450_BUCK6,
 554                         .ops = &pca9450_buck_regulator_ops,
 555                         .type = REGULATOR_VOLTAGE,
 556                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 557                         .linear_ranges = pca9450_buck_volts,
 558                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 559                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 560                         .vsel_mask = BUCK6OUT_MASK,
 561                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 562                         .enable_mask = BUCK6_ENMODE_MASK,
 563                         .owner = THIS_MODULE,
 564                 },
 565         },
 566         {
 567                 .desc = {
 568                         .name = "ldo1",
 569                         .of_match = of_match_ptr("LDO1"),
 570                         .regulators_node = of_match_ptr("regulators"),
 571                         .id = PCA9450_LDO1,
 572                         .ops = &pca9450_ldo_regulator_ops,
 573                         .type = REGULATOR_VOLTAGE,
 574                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 575                         .linear_ranges = pca9450_ldo1_volts,
 576                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 577                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 578                         .vsel_mask = LDO1OUT_MASK,
 579                         .enable_reg = PCA9450_REG_LDO1CTRL,
 580                         .enable_mask = LDO1_EN_MASK,
 581                         .owner = THIS_MODULE,
 582                 },
 583         },
 584         {
 585                 .desc = {
 586                         .name = "ldo2",
 587                         .of_match = of_match_ptr("LDO2"),
 588                         .regulators_node = of_match_ptr("regulators"),
 589                         .id = PCA9450_LDO2,
 590                         .ops = &pca9450_ldo_regulator_ops,
 591                         .type = REGULATOR_VOLTAGE,
 592                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 593                         .linear_ranges = pca9450_ldo2_volts,
 594                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 595                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 596                         .vsel_mask = LDO2OUT_MASK,
 597                         .enable_reg = PCA9450_REG_LDO2CTRL,
 598                         .enable_mask = LDO2_EN_MASK,
 599                         .owner = THIS_MODULE,
 600                 },
 601         },
 602         {
 603                 .desc = {
 604                         .name = "ldo3",
 605                         .of_match = of_match_ptr("LDO3"),
 606                         .regulators_node = of_match_ptr("regulators"),
 607                         .id = PCA9450_LDO3,
 608                         .ops = &pca9450_ldo_regulator_ops,
 609                         .type = REGULATOR_VOLTAGE,
 610                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 611                         .linear_ranges = pca9450_ldo34_volts,
 612                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 613                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 614                         .vsel_mask = LDO3OUT_MASK,
 615                         .enable_reg = PCA9450_REG_LDO3CTRL,
 616                         .enable_mask = LDO3_EN_MASK,
 617                         .owner = THIS_MODULE,
 618                 },
 619         },
 620         {
 621                 .desc = {
 622                         .name = "ldo4",
 623                         .of_match = of_match_ptr("LDO4"),
 624                         .regulators_node = of_match_ptr("regulators"),
 625                         .id = PCA9450_LDO4,
 626                         .ops = &pca9450_ldo_regulator_ops,
 627                         .type = REGULATOR_VOLTAGE,
 628                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 629                         .linear_ranges = pca9450_ldo34_volts,
 630                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 631                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 632                         .vsel_mask = LDO4OUT_MASK,
 633                         .enable_reg = PCA9450_REG_LDO4CTRL,
 634                         .enable_mask = LDO4_EN_MASK,
 635                         .owner = THIS_MODULE,
 636                 },
 637         },
 638         {
 639                 .desc = {
 640                         .name = "ldo5",
 641                         .of_match = of_match_ptr("LDO5"),
 642                         .regulators_node = of_match_ptr("regulators"),
 643                         .id = PCA9450_LDO5,
 644                         .ops = &pca9450_ldo_regulator_ops,
 645                         .type = REGULATOR_VOLTAGE,
 646                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 647                         .linear_ranges = pca9450_ldo5_volts,
 648                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 649                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 650                         .vsel_mask = LDO5HOUT_MASK,
 651                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 652                         .enable_mask = LDO5H_EN_MASK,
 653                         .owner = THIS_MODULE,
 654                 },
 655         },
 656 };
 657
 658 static irqreturn_t pca9450_irq_handler(int irq, void *data)
 659 {
 660         struct pca9450 *pca9450 = data;
 661         struct regmap *regmap = pca9450->regmap;
 662         unsigned int status;
 663         int ret;
 664
 665         ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
 666         if (ret < 0) {
 667                 dev_err(pca9450->dev,
 668                         "Failed to read INT1(%d)\n", ret);
 669                 return IRQ_NONE;
 670         }
 671
 672         if (status & IRQ_PWRON)
 673                 dev_warn(pca9450->dev, "PWRON interrupt.\n");
 674
 675         if (status & IRQ_WDOGB)
 676                 dev_warn(pca9450->dev, "WDOGB interrupt.\n");
 677
 678         if (status & IRQ_VR_FLT1)
 679                 dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
 680
 681         if (status & IRQ_VR_FLT2)
 682                 dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
 683
 684         if (status & IRQ_LOWVSYS)
 685                 dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
 686
 687         if (status & IRQ_THERM_105)
 688                 dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
 689
 690         if (status & IRQ_THERM_125)
 691                 dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
 692
 693         return IRQ_HANDLED;
 694 }
 695
 696 static int pca9450_i2c_probe(struct i2c_client *i2c,
 697                              const struct i2c_device_id *id)
 698 {
 699         enum pca9450_chip_type type = (unsigned int)(uintptr_t)
 700                                       of_device_get_match_data(&i2c->dev);
 701         const struct pca9450_regulator_desc     *regulator_desc;
 702         struct regulator_config config = { };
 703         struct pca9450 *pca9450;
 704         unsigned int device_id, i;
 705         int ret;
 706
 707         if (!i2c->irq) {
 708                 dev_err(&i2c->dev, "No IRQ configured?\n");
 709                 return -EINVAL;
 710         }
 711
 712         pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
 713         if (!pca9450)
 714                 return -ENOMEM;
 715
 716         switch (type) {
 717         case PCA9450_TYPE_PCA9450A:
 718                 regulator_desc = pca9450a_regulators;
 719                 pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
 720                 break;
 721         case PCA9450_TYPE_PCA9450BC:
 722                 regulator_desc = pca9450bc_regulators;
 723                 pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
 724                 break;
 725         default:
 726                 dev_err(&i2c->dev, "Unknown device type");
 727                 return -EINVAL;
 728         }
 729
 730         pca9450->irq = i2c->irq;
 731         pca9450->type = type;
 732         pca9450->dev = &i2c->dev;
 733
 734         dev_set_drvdata(&i2c->dev, pca9450);
 735
 736         pca9450->regmap = devm_regmap_init_i2c(i2c,
 737                                                &pca9450_regmap_config);
 738         if (IS_ERR(pca9450->regmap)) {
 739                 dev_err(&i2c->dev, "regmap initialization failed\n");
 740                 return PTR_ERR(pca9450->regmap);
 741         }
 742
 743         ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
 744         if (ret) {
 745                 dev_err(&i2c->dev, "Read device id error\n");
 746                 return ret;
 747         }
 748
 749         /* Check your board and dts for match the right pmic */
 750         if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
 751             ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
 752                 dev_err(&i2c->dev, "Device id(%x) mismatched\n",
 753                         device_id >> 4);
 754                 return -EINVAL;
 755         }
 756
 757         for (i = 0; i < pca9450->rcnt; i++) {
 758                 const struct regulator_desc *desc;
 759                 struct regulator_dev *rdev;
 760                 const struct pca9450_regulator_desc *r;
 761
 762                 r = &regulator_desc[i];
 763                 desc = &r->desc;
 764
 765                 config.regmap = pca9450->regmap;
 766                 config.dev = pca9450->dev;
 767
 768                 rdev = devm_regulator_register(pca9450->dev, desc, &config);
 769                 if (IS_ERR(rdev)) {
 770                         ret = PTR_ERR(rdev);
 771                         dev_err(pca9450->dev,
 772                                 "Failed to register regulator(%s): %d\n",
 773                                 desc->name, ret);
 774                         return ret;
 775                 }
 776         }
 777
 778         ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
 779                                         pca9450_irq_handler,
 780                                         (IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
 781                                         "pca9450-irq", pca9450);
 782         if (ret != 0) {
 783                 dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
 784                         pca9450->irq);
 785                 return ret;
 786         }
 787         /* Unmask all interrupt except PWRON/WDOG/RSVD */
 788         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
 789                                 IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
 790                                 IRQ_THERM_105 | IRQ_THERM_125,
 791                                 IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
 792         if (ret) {
 793                 dev_err(&i2c->dev, "Unmask irq error\n");
 794                 return ret;
 795         }
 796
 797         /* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
 798         ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
 799                                 BUCK123_PRESET_EN);
 800         if (ret) {
 801                 dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret);
 802                 return ret;
 803         }
 804
 805         /* Set reset behavior on assertion of WDOG_B signal */
 806         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
 807                                 WDOG_B_CFG_MASK, WDOG_B_CFG_COLD_LDO12);
 808         if (ret) {
 809                 dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
 810                 return ret;
 811         }
 812
 813         /*
 814          * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
 815          * This is only valid if the SD_VSEL input of the PMIC is high. Let's
 816          * check if the pin is available as GPIO and set it to high.
 817          */
 818         pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
 819
 820         if (IS_ERR(pca9450->sd_vsel_gpio)) {
 821                 dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
 822                 return PTR_ERR(pca9450->sd_vsel_gpio);
 823         }
 824
 825         dev_info(&i2c->dev, "%s probed.\n",
 826                 type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
 827
 828         return 0;
 829 }
 830
 831 static const struct of_device_id pca9450_of_match[] = {
 832         {
 833                 .compatible = "nxp,pca9450a",
 834                 .data = (void *)PCA9450_TYPE_PCA9450A,
 835         },
 836         {
 837                 .compatible = "nxp,pca9450b",
 838                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 839         },
 840         {
 841                 .compatible = "nxp,pca9450c",
 842                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 843         },
 844         { }
 845 };
 846 MODULE_DEVICE_TABLE(of, pca9450_of_match);
 847
 848 static struct i2c_driver pca9450_i2c_driver = {
 849         .driver = {
 850                 .name = "nxp-pca9450",
 851                 .of_match_table = pca9450_of_match,
 852         },
 853         .probe = pca9450_i2c_probe,
 854 };
 855
 856 module_i2c_driver(pca9450_i2c_driver);
 857
 858 MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
 859 MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
 860 MODULE_LICENSE("GPL");