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         if (ret == 0) {
 178                 struct pca9450_regulator_desc *regulator = container_of(desc,
 179                                         struct pca9450_regulator_desc, desc);
 180
 181                 /* Enable DVS control through PMIC_STBY_REQ for this BUCK */
 182                 ret = regmap_update_bits(regmap, regulator->desc.enable_reg,
 183                                          BUCK1_DVS_CTRL, BUCK1_DVS_CTRL);
 184         }
 185         return ret;
 186 }
 187
 188 static int pca9450_set_dvs_levels(struct device_node *np,
 189                             const struct regulator_desc *desc,
 190                             struct regulator_config *cfg)
 191 {
 192         struct pca9450_regulator_desc *data = container_of(desc,
 193                                         struct pca9450_regulator_desc, desc);
 194         const struct pc9450_dvs_config *dvs = &data->dvs;
 195         unsigned int reg, mask;
 196         char *prop;
 197         int i, ret = 0;
 198
 199         for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
 200                 switch (i) {
 201                 case PCA9450_DVS_LEVEL_RUN:
 202                         prop = "nxp,dvs-run-voltage";
 203                         reg = dvs->run_reg;
 204                         mask = dvs->run_mask;
 205                         break;
 206                 case PCA9450_DVS_LEVEL_STANDBY:
 207                         prop = "nxp,dvs-standby-voltage";
 208                         reg = dvs->standby_reg;
 209                         mask = dvs->standby_mask;
 210                         break;
 211                 default:
 212                         return -EINVAL;
 213                 }
 214
 215                 ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
 216                 if (ret)
 217                         break;
 218         }
 219
 220         return ret;
 221 }
 222
 223 static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 224         {
 225                 .desc = {
 226                         .name = "buck1",
 227                         .of_match = of_match_ptr("BUCK1"),
 228                         .regulators_node = of_match_ptr("regulators"),
 229                         .id = PCA9450_BUCK1,
 230                         .ops = &pca9450_dvs_buck_regulator_ops,
 231                         .type = REGULATOR_VOLTAGE,
 232                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 233                         .linear_ranges = pca9450_dvs_buck_volts,
 234                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 235                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 236                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 237                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 238                         .enable_mask = BUCK1_ENMODE_MASK,
 239                         .ramp_reg = PCA9450_REG_BUCK1CTRL,
 240                         .ramp_mask = BUCK1_RAMP_MASK,
 241                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 242                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 243                         .owner = THIS_MODULE,
 244                         .of_parse_cb = pca9450_set_dvs_levels,
 245                 },
 246                 .dvs = {
 247                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 248                         .run_mask = BUCK1OUT_DVS0_MASK,
 249                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 250                         .standby_mask = BUCK1OUT_DVS1_MASK,
 251                 },
 252         },
 253         {
 254                 .desc = {
 255                         .name = "buck2",
 256                         .of_match = of_match_ptr("BUCK2"),
 257                         .regulators_node = of_match_ptr("regulators"),
 258                         .id = PCA9450_BUCK2,
 259                         .ops = &pca9450_dvs_buck_regulator_ops,
 260                         .type = REGULATOR_VOLTAGE,
 261                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 262                         .linear_ranges = pca9450_dvs_buck_volts,
 263                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 264                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 265                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 266                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 267                         .enable_mask = BUCK1_ENMODE_MASK,
 268                         .ramp_reg = PCA9450_REG_BUCK2CTRL,
 269                         .ramp_mask = BUCK2_RAMP_MASK,
 270                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 271                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 272                         .owner = THIS_MODULE,
 273                         .of_parse_cb = pca9450_set_dvs_levels,
 274                 },
 275                 .dvs = {
 276                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 277                         .run_mask = BUCK2OUT_DVS0_MASK,
 278                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 279                         .standby_mask = BUCK2OUT_DVS1_MASK,
 280                 },
 281         },
 282         {
 283                 .desc = {
 284                         .name = "buck3",
 285                         .of_match = of_match_ptr("BUCK3"),
 286                         .regulators_node = of_match_ptr("regulators"),
 287                         .id = PCA9450_BUCK3,
 288                         .ops = &pca9450_dvs_buck_regulator_ops,
 289                         .type = REGULATOR_VOLTAGE,
 290                         .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
 291                         .linear_ranges = pca9450_dvs_buck_volts,
 292                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 293                         .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
 294                         .vsel_mask = BUCK3OUT_DVS0_MASK,
 295                         .enable_reg = PCA9450_REG_BUCK3CTRL,
 296                         .enable_mask = BUCK3_ENMODE_MASK,
 297                         .ramp_reg = PCA9450_REG_BUCK3CTRL,
 298                         .ramp_mask = BUCK3_RAMP_MASK,
 299                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 300                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 301                         .owner = THIS_MODULE,
 302                         .of_parse_cb = pca9450_set_dvs_levels,
 303                 },
 304                 .dvs = {
 305                         .run_reg = PCA9450_REG_BUCK3OUT_DVS0,
 306                         .run_mask = BUCK3OUT_DVS0_MASK,
 307                         .standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
 308                         .standby_mask = BUCK3OUT_DVS1_MASK,
 309                 },
 310         },
 311         {
 312                 .desc = {
 313                         .name = "buck4",
 314                         .of_match = of_match_ptr("BUCK4"),
 315                         .regulators_node = of_match_ptr("regulators"),
 316                         .id = PCA9450_BUCK4,
 317                         .ops = &pca9450_buck_regulator_ops,
 318                         .type = REGULATOR_VOLTAGE,
 319                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 320                         .linear_ranges = pca9450_buck_volts,
 321                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 322                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 323                         .vsel_mask = BUCK4OUT_MASK,
 324                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 325                         .enable_mask = BUCK4_ENMODE_MASK,
 326                         .owner = THIS_MODULE,
 327                 },
 328         },
 329         {
 330                 .desc = {
 331                         .name = "buck5",
 332                         .of_match = of_match_ptr("BUCK5"),
 333                         .regulators_node = of_match_ptr("regulators"),
 334                         .id = PCA9450_BUCK5,
 335                         .ops = &pca9450_buck_regulator_ops,
 336                         .type = REGULATOR_VOLTAGE,
 337                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 338                         .linear_ranges = pca9450_buck_volts,
 339                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 340                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 341                         .vsel_mask = BUCK5OUT_MASK,
 342                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 343                         .enable_mask = BUCK5_ENMODE_MASK,
 344                         .owner = THIS_MODULE,
 345                 },
 346         },
 347         {
 348                 .desc = {
 349                         .name = "buck6",
 350                         .of_match = of_match_ptr("BUCK6"),
 351                         .regulators_node = of_match_ptr("regulators"),
 352                         .id = PCA9450_BUCK6,
 353                         .ops = &pca9450_buck_regulator_ops,
 354                         .type = REGULATOR_VOLTAGE,
 355                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 356                         .linear_ranges = pca9450_buck_volts,
 357                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 358                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 359                         .vsel_mask = BUCK6OUT_MASK,
 360                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 361                         .enable_mask = BUCK6_ENMODE_MASK,
 362                         .owner = THIS_MODULE,
 363                 },
 364         },
 365         {
 366                 .desc = {
 367                         .name = "ldo1",
 368                         .of_match = of_match_ptr("LDO1"),
 369                         .regulators_node = of_match_ptr("regulators"),
 370                         .id = PCA9450_LDO1,
 371                         .ops = &pca9450_ldo_regulator_ops,
 372                         .type = REGULATOR_VOLTAGE,
 373                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 374                         .linear_ranges = pca9450_ldo1_volts,
 375                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 376                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 377                         .vsel_mask = LDO1OUT_MASK,
 378                         .enable_reg = PCA9450_REG_LDO1CTRL,
 379                         .enable_mask = LDO1_EN_MASK,
 380                         .owner = THIS_MODULE,
 381                 },
 382         },
 383         {
 384                 .desc = {
 385                         .name = "ldo2",
 386                         .of_match = of_match_ptr("LDO2"),
 387                         .regulators_node = of_match_ptr("regulators"),
 388                         .id = PCA9450_LDO2,
 389                         .ops = &pca9450_ldo_regulator_ops,
 390                         .type = REGULATOR_VOLTAGE,
 391                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 392                         .linear_ranges = pca9450_ldo2_volts,
 393                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 394                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 395                         .vsel_mask = LDO2OUT_MASK,
 396                         .enable_reg = PCA9450_REG_LDO2CTRL,
 397                         .enable_mask = LDO2_EN_MASK,
 398                         .owner = THIS_MODULE,
 399                 },
 400         },
 401         {
 402                 .desc = {
 403                         .name = "ldo3",
 404                         .of_match = of_match_ptr("LDO3"),
 405                         .regulators_node = of_match_ptr("regulators"),
 406                         .id = PCA9450_LDO3,
 407                         .ops = &pca9450_ldo_regulator_ops,
 408                         .type = REGULATOR_VOLTAGE,
 409                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 410                         .linear_ranges = pca9450_ldo34_volts,
 411                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 412                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 413                         .vsel_mask = LDO3OUT_MASK,
 414                         .enable_reg = PCA9450_REG_LDO3CTRL,
 415                         .enable_mask = LDO3_EN_MASK,
 416                         .owner = THIS_MODULE,
 417                 },
 418         },
 419         {
 420                 .desc = {
 421                         .name = "ldo4",
 422                         .of_match = of_match_ptr("LDO4"),
 423                         .regulators_node = of_match_ptr("regulators"),
 424                         .id = PCA9450_LDO4,
 425                         .ops = &pca9450_ldo_regulator_ops,
 426                         .type = REGULATOR_VOLTAGE,
 427                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 428                         .linear_ranges = pca9450_ldo34_volts,
 429                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 430                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 431                         .vsel_mask = LDO4OUT_MASK,
 432                         .enable_reg = PCA9450_REG_LDO4CTRL,
 433                         .enable_mask = LDO4_EN_MASK,
 434                         .owner = THIS_MODULE,
 435                 },
 436         },
 437         {
 438                 .desc = {
 439                         .name = "ldo5",
 440                         .of_match = of_match_ptr("LDO5"),
 441                         .regulators_node = of_match_ptr("regulators"),
 442                         .id = PCA9450_LDO5,
 443                         .ops = &pca9450_ldo_regulator_ops,
 444                         .type = REGULATOR_VOLTAGE,
 445                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 446                         .linear_ranges = pca9450_ldo5_volts,
 447                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 448                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 449                         .vsel_mask = LDO5HOUT_MASK,
 450                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 451                         .enable_mask = LDO5H_EN_MASK,
 452                         .owner = THIS_MODULE,
 453                 },
 454         },
 455 };
 456
 457 /*
 458  * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
 459  * on PCA9450C as no Buck3.
 460  */
 461 static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 462         {
 463                 .desc = {
 464                         .name = "buck1",
 465                         .of_match = of_match_ptr("BUCK1"),
 466                         .regulators_node = of_match_ptr("regulators"),
 467                         .id = PCA9450_BUCK1,
 468                         .ops = &pca9450_dvs_buck_regulator_ops,
 469                         .type = REGULATOR_VOLTAGE,
 470                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 471                         .linear_ranges = pca9450_dvs_buck_volts,
 472                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 473                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 474                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 475                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 476                         .enable_mask = BUCK1_ENMODE_MASK,
 477                         .ramp_reg = PCA9450_REG_BUCK1CTRL,
 478                         .ramp_mask = BUCK1_RAMP_MASK,
 479                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 480                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 481                         .owner = THIS_MODULE,
 482                         .of_parse_cb = pca9450_set_dvs_levels,
 483                 },
 484                 .dvs = {
 485                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 486                         .run_mask = BUCK1OUT_DVS0_MASK,
 487                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 488                         .standby_mask = BUCK1OUT_DVS1_MASK,
 489                 },
 490         },
 491         {
 492                 .desc = {
 493                         .name = "buck2",
 494                         .of_match = of_match_ptr("BUCK2"),
 495                         .regulators_node = of_match_ptr("regulators"),
 496                         .id = PCA9450_BUCK2,
 497                         .ops = &pca9450_dvs_buck_regulator_ops,
 498                         .type = REGULATOR_VOLTAGE,
 499                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 500                         .linear_ranges = pca9450_dvs_buck_volts,
 501                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 502                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 503                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 504                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 505                         .enable_mask = BUCK1_ENMODE_MASK,
 506                         .ramp_reg = PCA9450_REG_BUCK2CTRL,
 507                         .ramp_mask = BUCK2_RAMP_MASK,
 508                         .ramp_delay_table = pca9450_dvs_buck_ramp_table,
 509                         .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
 510                         .owner = THIS_MODULE,
 511                         .of_parse_cb = pca9450_set_dvs_levels,
 512                 },
 513                 .dvs = {
 514                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 515                         .run_mask = BUCK2OUT_DVS0_MASK,
 516                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 517                         .standby_mask = BUCK2OUT_DVS1_MASK,
 518                 },
 519         },
 520         {
 521                 .desc = {
 522                         .name = "buck4",
 523                         .of_match = of_match_ptr("BUCK4"),
 524                         .regulators_node = of_match_ptr("regulators"),
 525                         .id = PCA9450_BUCK4,
 526                         .ops = &pca9450_buck_regulator_ops,
 527                         .type = REGULATOR_VOLTAGE,
 528                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 529                         .linear_ranges = pca9450_buck_volts,
 530                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 531                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 532                         .vsel_mask = BUCK4OUT_MASK,
 533                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 534                         .enable_mask = BUCK4_ENMODE_MASK,
 535                         .owner = THIS_MODULE,
 536                 },
 537         },
 538         {
 539                 .desc = {
 540                         .name = "buck5",
 541                         .of_match = of_match_ptr("BUCK5"),
 542                         .regulators_node = of_match_ptr("regulators"),
 543                         .id = PCA9450_BUCK5,
 544                         .ops = &pca9450_buck_regulator_ops,
 545                         .type = REGULATOR_VOLTAGE,
 546                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 547                         .linear_ranges = pca9450_buck_volts,
 548                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 549                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 550                         .vsel_mask = BUCK5OUT_MASK,
 551                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 552                         .enable_mask = BUCK5_ENMODE_MASK,
 553                         .owner = THIS_MODULE,
 554                 },
 555         },
 556         {
 557                 .desc = {
 558                         .name = "buck6",
 559                         .of_match = of_match_ptr("BUCK6"),
 560                         .regulators_node = of_match_ptr("regulators"),
 561                         .id = PCA9450_BUCK6,
 562                         .ops = &pca9450_buck_regulator_ops,
 563                         .type = REGULATOR_VOLTAGE,
 564                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 565                         .linear_ranges = pca9450_buck_volts,
 566                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 567                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 568                         .vsel_mask = BUCK6OUT_MASK,
 569                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 570                         .enable_mask = BUCK6_ENMODE_MASK,
 571                         .owner = THIS_MODULE,
 572                 },
 573         },
 574         {
 575                 .desc = {
 576                         .name = "ldo1",
 577                         .of_match = of_match_ptr("LDO1"),
 578                         .regulators_node = of_match_ptr("regulators"),
 579                         .id = PCA9450_LDO1,
 580                         .ops = &pca9450_ldo_regulator_ops,
 581                         .type = REGULATOR_VOLTAGE,
 582                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 583                         .linear_ranges = pca9450_ldo1_volts,
 584                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 585                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 586                         .vsel_mask = LDO1OUT_MASK,
 587                         .enable_reg = PCA9450_REG_LDO1CTRL,
 588                         .enable_mask = LDO1_EN_MASK,
 589                         .owner = THIS_MODULE,
 590                 },
 591         },
 592         {
 593                 .desc = {
 594                         .name = "ldo2",
 595                         .of_match = of_match_ptr("LDO2"),
 596                         .regulators_node = of_match_ptr("regulators"),
 597                         .id = PCA9450_LDO2,
 598                         .ops = &pca9450_ldo_regulator_ops,
 599                         .type = REGULATOR_VOLTAGE,
 600                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 601                         .linear_ranges = pca9450_ldo2_volts,
 602                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 603                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 604                         .vsel_mask = LDO2OUT_MASK,
 605                         .enable_reg = PCA9450_REG_LDO2CTRL,
 606                         .enable_mask = LDO2_EN_MASK,
 607                         .owner = THIS_MODULE,
 608                 },
 609         },
 610         {
 611                 .desc = {
 612                         .name = "ldo3",
 613                         .of_match = of_match_ptr("LDO3"),
 614                         .regulators_node = of_match_ptr("regulators"),
 615                         .id = PCA9450_LDO3,
 616                         .ops = &pca9450_ldo_regulator_ops,
 617                         .type = REGULATOR_VOLTAGE,
 618                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 619                         .linear_ranges = pca9450_ldo34_volts,
 620                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 621                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 622                         .vsel_mask = LDO3OUT_MASK,
 623                         .enable_reg = PCA9450_REG_LDO3CTRL,
 624                         .enable_mask = LDO3_EN_MASK,
 625                         .owner = THIS_MODULE,
 626                 },
 627         },
 628         {
 629                 .desc = {
 630                         .name = "ldo4",
 631                         .of_match = of_match_ptr("LDO4"),
 632                         .regulators_node = of_match_ptr("regulators"),
 633                         .id = PCA9450_LDO4,
 634                         .ops = &pca9450_ldo_regulator_ops,
 635                         .type = REGULATOR_VOLTAGE,
 636                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 637                         .linear_ranges = pca9450_ldo34_volts,
 638                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 639                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 640                         .vsel_mask = LDO4OUT_MASK,
 641                         .enable_reg = PCA9450_REG_LDO4CTRL,
 642                         .enable_mask = LDO4_EN_MASK,
 643                         .owner = THIS_MODULE,
 644                 },
 645         },
 646         {
 647                 .desc = {
 648                         .name = "ldo5",
 649                         .of_match = of_match_ptr("LDO5"),
 650                         .regulators_node = of_match_ptr("regulators"),
 651                         .id = PCA9450_LDO5,
 652                         .ops = &pca9450_ldo_regulator_ops,
 653                         .type = REGULATOR_VOLTAGE,
 654                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 655                         .linear_ranges = pca9450_ldo5_volts,
 656                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 657                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 658                         .vsel_mask = LDO5HOUT_MASK,
 659                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 660                         .enable_mask = LDO5H_EN_MASK,
 661                         .owner = THIS_MODULE,
 662                 },
 663         },
 664 };
 665
 666 static irqreturn_t pca9450_irq_handler(int irq, void *data)
 667 {
 668         struct pca9450 *pca9450 = data;
 669         struct regmap *regmap = pca9450->regmap;
 670         unsigned int status;
 671         int ret;
 672
 673         ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
 674         if (ret < 0) {
 675                 dev_err(pca9450->dev,
 676                         "Failed to read INT1(%d)\n", ret);
 677                 return IRQ_NONE;
 678         }
 679
 680         if (status & IRQ_PWRON)
 681                 dev_warn(pca9450->dev, "PWRON interrupt.\n");
 682
 683         if (status & IRQ_WDOGB)
 684                 dev_warn(pca9450->dev, "WDOGB interrupt.\n");
 685
 686         if (status & IRQ_VR_FLT1)
 687                 dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
 688
 689         if (status & IRQ_VR_FLT2)
 690                 dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
 691
 692         if (status & IRQ_LOWVSYS)
 693                 dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
 694
 695         if (status & IRQ_THERM_105)
 696                 dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
 697
 698         if (status & IRQ_THERM_125)
 699                 dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
 700
 701         return IRQ_HANDLED;
 702 }
 703
 704 static int pca9450_i2c_probe(struct i2c_client *i2c,
 705                              const struct i2c_device_id *id)
 706 {
 707         enum pca9450_chip_type type = (unsigned int)(uintptr_t)
 708                                       of_device_get_match_data(&i2c->dev);
 709         const struct pca9450_regulator_desc     *regulator_desc;
 710         struct regulator_config config = { };
 711         struct pca9450 *pca9450;
 712         unsigned int device_id, i;
 713         unsigned int reset_ctrl;
 714         int ret;
 715
 716         if (!i2c->irq) {
 717                 dev_err(&i2c->dev, "No IRQ configured?\n");
 718                 return -EINVAL;
 719         }
 720
 721         pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
 722         if (!pca9450)
 723                 return -ENOMEM;
 724
 725         switch (type) {
 726         case PCA9450_TYPE_PCA9450A:
 727                 regulator_desc = pca9450a_regulators;
 728                 pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
 729                 break;
 730         case PCA9450_TYPE_PCA9450BC:
 731                 regulator_desc = pca9450bc_regulators;
 732                 pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
 733                 break;
 734         default:
 735                 dev_err(&i2c->dev, "Unknown device type");
 736                 return -EINVAL;
 737         }
 738
 739         pca9450->irq = i2c->irq;
 740         pca9450->type = type;
 741         pca9450->dev = &i2c->dev;
 742
 743         dev_set_drvdata(&i2c->dev, pca9450);
 744
 745         pca9450->regmap = devm_regmap_init_i2c(i2c,
 746                                                &pca9450_regmap_config);
 747         if (IS_ERR(pca9450->regmap)) {
 748                 dev_err(&i2c->dev, "regmap initialization failed\n");
 749                 return PTR_ERR(pca9450->regmap);
 750         }
 751
 752         ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
 753         if (ret) {
 754                 dev_err(&i2c->dev, "Read device id error\n");
 755                 return ret;
 756         }
 757
 758         /* Check your board and dts for match the right pmic */
 759         if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
 760             ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
 761                 dev_err(&i2c->dev, "Device id(%x) mismatched\n",
 762                         device_id >> 4);
 763                 return -EINVAL;
 764         }
 765
 766         for (i = 0; i < pca9450->rcnt; i++) {
 767                 const struct regulator_desc *desc;
 768                 struct regulator_dev *rdev;
 769                 const struct pca9450_regulator_desc *r;
 770
 771                 r = &regulator_desc[i];
 772                 desc = &r->desc;
 773
 774                 config.regmap = pca9450->regmap;
 775                 config.dev = pca9450->dev;
 776
 777                 rdev = devm_regulator_register(pca9450->dev, desc, &config);
 778                 if (IS_ERR(rdev)) {
 779                         ret = PTR_ERR(rdev);
 780                         dev_err(pca9450->dev,
 781                                 "Failed to register regulator(%s): %d\n",
 782                                 desc->name, ret);
 783                         return ret;
 784                 }
 785         }
 786
 787         ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
 788                                         pca9450_irq_handler,
 789                                         (IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
 790                                         "pca9450-irq", pca9450);
 791         if (ret != 0) {
 792                 dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
 793                         pca9450->irq);
 794                 return ret;
 795         }
 796         /* Unmask all interrupt except PWRON/WDOG/RSVD */
 797         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
 798                                 IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
 799                                 IRQ_THERM_105 | IRQ_THERM_125,
 800                                 IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
 801         if (ret) {
 802                 dev_err(&i2c->dev, "Unmask irq error\n");
 803                 return ret;
 804         }
 805
 806         /* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
 807         ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
 808                                 BUCK123_PRESET_EN);
 809         if (ret) {
 810                 dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret);
 811                 return ret;
 812         }
 813
 814         if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
 815                 reset_ctrl = WDOG_B_CFG_WARM;
 816         else
 817                 reset_ctrl = WDOG_B_CFG_COLD_LDO12;
 818
 819         /* Set reset behavior on assertion of WDOG_B signal */
 820         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
 821                                  WDOG_B_CFG_MASK, reset_ctrl);
 822         if (ret) {
 823                 dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
 824                 return ret;
 825         }
 826
 827         if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) {
 828                 /* Enable I2C Level Translator */
 829                 ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2,
 830                                          I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN);
 831                 if (ret) {
 832                         dev_err(&i2c->dev,
 833                                 "Failed to enable I2C level translator\n");
 834                         return ret;
 835                 }
 836         }
 837
 838         /*
 839          * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
 840          * This is only valid if the SD_VSEL input of the PMIC is high. Let's
 841          * check if the pin is available as GPIO and set it to high.
 842          */
 843         pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
 844
 845         if (IS_ERR(pca9450->sd_vsel_gpio)) {
 846                 dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
 847                 return PTR_ERR(pca9450->sd_vsel_gpio);
 848         }
 849
 850         dev_info(&i2c->dev, "%s probed.\n",
 851                 type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
 852
 853         return 0;
 854 }
 855
 856 static const struct of_device_id pca9450_of_match[] = {
 857         {
 858                 .compatible = "nxp,pca9450a",
 859                 .data = (void *)PCA9450_TYPE_PCA9450A,
 860         },
 861         {
 862                 .compatible = "nxp,pca9450b",
 863                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 864         },
 865         {
 866                 .compatible = "nxp,pca9450c",
 867                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 868         },
 869         { }
 870 };
 871 MODULE_DEVICE_TABLE(of, pca9450_of_match);
 872
 873 static struct i2c_driver pca9450_i2c_driver = {
 874         .driver = {
 875                 .name = "nxp-pca9450",
 876                 .of_match_table = pca9450_of_match,
 877         },
 878         .probe = pca9450_i2c_probe,
 879 };
 880
 881 module_i2c_driver(pca9450_i2c_driver);
 882
 883 MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
 884 MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
 885 MODULE_LICENSE("GPL");