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 int pca9450_dvs_set_ramp_delay(struct regulator_dev *rdev,
  69                                       int ramp_delay)
  70 {
  71         int id = rdev_get_id(rdev);
  72         unsigned int ramp_value;
  73
  74         switch (ramp_delay) {
  75         case 1 ... 3125:
  76                 ramp_value = BUCK1_RAMP_3P125MV;
  77                 break;
  78         case 3126 ... 6250:
  79                 ramp_value = BUCK1_RAMP_6P25MV;
  80                 break;
  81         case 6251 ... 12500:
  82                 ramp_value = BUCK1_RAMP_12P5MV;
  83                 break;
  84         case 12501 ... 25000:
  85                 ramp_value = BUCK1_RAMP_25MV;
  86                 break;
  87         default:
  88                 ramp_value = BUCK1_RAMP_25MV;
  89         }
  90
  91         return regmap_update_bits(rdev->regmap, PCA9450_REG_BUCK1CTRL + id * 3,
  92                                   BUCK1_RAMP_MASK, ramp_value << 6);
  93 }
  94
  95 static const struct regulator_ops pca9450_dvs_buck_regulator_ops = {
  96         .enable = regulator_enable_regmap,
  97         .disable = regulator_disable_regmap,
  98         .is_enabled = regulator_is_enabled_regmap,
  99         .list_voltage = regulator_list_voltage_linear_range,
 100         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 101         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 102         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 103         .set_ramp_delay = pca9450_dvs_set_ramp_delay,
 104 };
 105
 106 static const struct regulator_ops pca9450_buck_regulator_ops = {
 107         .enable = regulator_enable_regmap,
 108         .disable = regulator_disable_regmap,
 109         .is_enabled = regulator_is_enabled_regmap,
 110         .list_voltage = regulator_list_voltage_linear_range,
 111         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 112         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 113         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 114 };
 115
 116 static const struct regulator_ops pca9450_ldo_regulator_ops = {
 117         .enable = regulator_enable_regmap,
 118         .disable = regulator_disable_regmap,
 119         .is_enabled = regulator_is_enabled_regmap,
 120         .list_voltage = regulator_list_voltage_linear_range,
 121         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 122         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 123 };
 124
 125 /*
 126  * BUCK1/2/3
 127  * 0.60 to 2.1875V (12.5mV step)
 128  */
 129 static const struct linear_range pca9450_dvs_buck_volts[] = {
 130         REGULATOR_LINEAR_RANGE(600000,  0x00, 0x7F, 12500),
 131 };
 132
 133 /*
 134  * BUCK4/5/6
 135  * 0.6V to 3.4V (25mV step)
 136  */
 137 static const struct linear_range pca9450_buck_volts[] = {
 138         REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
 139         REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
 140 };
 141
 142 /*
 143  * LDO1
 144  * 1.6 to 3.3V ()
 145  */
 146 static const struct linear_range pca9450_ldo1_volts[] = {
 147         REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
 148         REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
 149 };
 150
 151 /*
 152  * LDO2
 153  * 0.8 to 1.15V (50mV step)
 154  */
 155 static const struct linear_range pca9450_ldo2_volts[] = {
 156         REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
 157 };
 158
 159 /*
 160  * LDO3/4
 161  * 0.8 to 3.3V (100mV step)
 162  */
 163 static const struct linear_range pca9450_ldo34_volts[] = {
 164         REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
 165         REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
 166 };
 167
 168 /*
 169  * LDO5
 170  * 1.8 to 3.3V (100mV step)
 171  */
 172 static const struct linear_range pca9450_ldo5_volts[] = {
 173         REGULATOR_LINEAR_RANGE(1800000,  0x00, 0x0F, 100000),
 174 };
 175
 176 static int buck_set_dvs(const struct regulator_desc *desc,
 177                         struct device_node *np, struct regmap *regmap,
 178                         char *prop, unsigned int reg, unsigned int mask)
 179 {
 180         int ret, i;
 181         uint32_t uv;
 182
 183         ret = of_property_read_u32(np, prop, &uv);
 184         if (ret == -EINVAL)
 185                 return 0;
 186         else if (ret)
 187                 return ret;
 188
 189         for (i = 0; i < desc->n_voltages; i++) {
 190                 ret = regulator_desc_list_voltage_linear_range(desc, i);
 191                 if (ret < 0)
 192                         continue;
 193                 if (ret == uv) {
 194                         i <<= ffs(desc->vsel_mask) - 1;
 195                         ret = regmap_update_bits(regmap, reg, mask, i);
 196                         break;
 197                 }
 198         }
 199
 200         return ret;
 201 }
 202
 203 static int pca9450_set_dvs_levels(struct device_node *np,
 204                             const struct regulator_desc *desc,
 205                             struct regulator_config *cfg)
 206 {
 207         struct pca9450_regulator_desc *data = container_of(desc,
 208                                         struct pca9450_regulator_desc, desc);
 209         const struct pc9450_dvs_config *dvs = &data->dvs;
 210         unsigned int reg, mask;
 211         char *prop;
 212         int i, ret = 0;
 213
 214         for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
 215                 switch (i) {
 216                 case PCA9450_DVS_LEVEL_RUN:
 217                         prop = "nxp,dvs-run-voltage";
 218                         reg = dvs->run_reg;
 219                         mask = dvs->run_mask;
 220                         break;
 221                 case PCA9450_DVS_LEVEL_STANDBY:
 222                         prop = "nxp,dvs-standby-voltage";
 223                         reg = dvs->standby_reg;
 224                         mask = dvs->standby_mask;
 225                         break;
 226                 default:
 227                         return -EINVAL;
 228                 }
 229
 230                 ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
 231                 if (ret)
 232                         break;
 233         }
 234
 235         return ret;
 236 }
 237
 238 static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 239         {
 240                 .desc = {
 241                         .name = "buck1",
 242                         .of_match = of_match_ptr("BUCK1"),
 243                         .regulators_node = of_match_ptr("regulators"),
 244                         .id = PCA9450_BUCK1,
 245                         .ops = &pca9450_dvs_buck_regulator_ops,
 246                         .type = REGULATOR_VOLTAGE,
 247                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 248                         .linear_ranges = pca9450_dvs_buck_volts,
 249                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 250                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 251                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 252                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 253                         .enable_mask = BUCK1_ENMODE_MASK,
 254                         .owner = THIS_MODULE,
 255                         .of_parse_cb = pca9450_set_dvs_levels,
 256                 },
 257                 .dvs = {
 258                         .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
 259                         .run_mask = BUCK1OUT_DVS0_MASK,
 260                         .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
 261                         .standby_mask = BUCK1OUT_DVS1_MASK,
 262                 },
 263         },
 264         {
 265                 .desc = {
 266                         .name = "buck2",
 267                         .of_match = of_match_ptr("BUCK2"),
 268                         .regulators_node = of_match_ptr("regulators"),
 269                         .id = PCA9450_BUCK2,
 270                         .ops = &pca9450_dvs_buck_regulator_ops,
 271                         .type = REGULATOR_VOLTAGE,
 272                         .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
 273                         .linear_ranges = pca9450_dvs_buck_volts,
 274                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 275                         .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
 276                         .vsel_mask = BUCK2OUT_DVS0_MASK,
 277                         .enable_reg = PCA9450_REG_BUCK2CTRL,
 278                         .enable_mask = BUCK1_ENMODE_MASK,
 279                         .owner = THIS_MODULE,
 280                         .of_parse_cb = pca9450_set_dvs_levels,
 281                 },
 282                 .dvs = {
 283                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 284                         .run_mask = BUCK2OUT_DVS0_MASK,
 285                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 286                         .standby_mask = BUCK2OUT_DVS1_MASK,
 287                 },
 288         },
 289         {
 290                 .desc = {
 291                         .name = "buck3",
 292                         .of_match = of_match_ptr("BUCK3"),
 293                         .regulators_node = of_match_ptr("regulators"),
 294                         .id = PCA9450_BUCK3,
 295                         .ops = &pca9450_dvs_buck_regulator_ops,
 296                         .type = REGULATOR_VOLTAGE,
 297                         .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
 298                         .linear_ranges = pca9450_dvs_buck_volts,
 299                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 300                         .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
 301                         .vsel_mask = BUCK3OUT_DVS0_MASK,
 302                         .enable_reg = PCA9450_REG_BUCK3CTRL,
 303                         .enable_mask = BUCK3_ENMODE_MASK,
 304                         .owner = THIS_MODULE,
 305                         .of_parse_cb = pca9450_set_dvs_levels,
 306                 },
 307                 .dvs = {
 308                         .run_reg = PCA9450_REG_BUCK3OUT_DVS0,
 309                         .run_mask = BUCK3OUT_DVS0_MASK,
 310                         .standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
 311                         .standby_mask = BUCK3OUT_DVS1_MASK,
 312                 },
 313         },
 314         {
 315                 .desc = {
 316                         .name = "buck4",
 317                         .of_match = of_match_ptr("BUCK4"),
 318                         .regulators_node = of_match_ptr("regulators"),
 319                         .id = PCA9450_BUCK4,
 320                         .ops = &pca9450_buck_regulator_ops,
 321                         .type = REGULATOR_VOLTAGE,
 322                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 323                         .linear_ranges = pca9450_buck_volts,
 324                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 325                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 326                         .vsel_mask = BUCK4OUT_MASK,
 327                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 328                         .enable_mask = BUCK4_ENMODE_MASK,
 329                         .owner = THIS_MODULE,
 330                 },
 331         },
 332         {
 333                 .desc = {
 334                         .name = "buck5",
 335                         .of_match = of_match_ptr("BUCK5"),
 336                         .regulators_node = of_match_ptr("regulators"),
 337                         .id = PCA9450_BUCK5,
 338                         .ops = &pca9450_buck_regulator_ops,
 339                         .type = REGULATOR_VOLTAGE,
 340                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 341                         .linear_ranges = pca9450_buck_volts,
 342                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 343                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 344                         .vsel_mask = BUCK5OUT_MASK,
 345                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 346                         .enable_mask = BUCK5_ENMODE_MASK,
 347                         .owner = THIS_MODULE,
 348                 },
 349         },
 350         {
 351                 .desc = {
 352                         .name = "buck6",
 353                         .of_match = of_match_ptr("BUCK6"),
 354                         .regulators_node = of_match_ptr("regulators"),
 355                         .id = PCA9450_BUCK6,
 356                         .ops = &pca9450_buck_regulator_ops,
 357                         .type = REGULATOR_VOLTAGE,
 358                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 359                         .linear_ranges = pca9450_buck_volts,
 360                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 361                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 362                         .vsel_mask = BUCK6OUT_MASK,
 363                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 364                         .enable_mask = BUCK6_ENMODE_MASK,
 365                         .owner = THIS_MODULE,
 366                 },
 367         },
 368         {
 369                 .desc = {
 370                         .name = "ldo1",
 371                         .of_match = of_match_ptr("LDO1"),
 372                         .regulators_node = of_match_ptr("regulators"),
 373                         .id = PCA9450_LDO1,
 374                         .ops = &pca9450_ldo_regulator_ops,
 375                         .type = REGULATOR_VOLTAGE,
 376                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 377                         .linear_ranges = pca9450_ldo1_volts,
 378                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 379                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 380                         .vsel_mask = LDO1OUT_MASK,
 381                         .enable_reg = PCA9450_REG_LDO1CTRL,
 382                         .enable_mask = LDO1_EN_MASK,
 383                         .owner = THIS_MODULE,
 384                 },
 385         },
 386         {
 387                 .desc = {
 388                         .name = "ldo2",
 389                         .of_match = of_match_ptr("LDO2"),
 390                         .regulators_node = of_match_ptr("regulators"),
 391                         .id = PCA9450_LDO2,
 392                         .ops = &pca9450_ldo_regulator_ops,
 393                         .type = REGULATOR_VOLTAGE,
 394                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 395                         .linear_ranges = pca9450_ldo2_volts,
 396                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 397                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 398                         .vsel_mask = LDO2OUT_MASK,
 399                         .enable_reg = PCA9450_REG_LDO2CTRL,
 400                         .enable_mask = LDO2_EN_MASK,
 401                         .owner = THIS_MODULE,
 402                 },
 403         },
 404         {
 405                 .desc = {
 406                         .name = "ldo3",
 407                         .of_match = of_match_ptr("LDO3"),
 408                         .regulators_node = of_match_ptr("regulators"),
 409                         .id = PCA9450_LDO3,
 410                         .ops = &pca9450_ldo_regulator_ops,
 411                         .type = REGULATOR_VOLTAGE,
 412                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 413                         .linear_ranges = pca9450_ldo34_volts,
 414                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 415                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 416                         .vsel_mask = LDO3OUT_MASK,
 417                         .enable_reg = PCA9450_REG_LDO3CTRL,
 418                         .enable_mask = LDO3_EN_MASK,
 419                         .owner = THIS_MODULE,
 420                 },
 421         },
 422         {
 423                 .desc = {
 424                         .name = "ldo4",
 425                         .of_match = of_match_ptr("LDO4"),
 426                         .regulators_node = of_match_ptr("regulators"),
 427                         .id = PCA9450_LDO4,
 428                         .ops = &pca9450_ldo_regulator_ops,
 429                         .type = REGULATOR_VOLTAGE,
 430                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 431                         .linear_ranges = pca9450_ldo34_volts,
 432                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 433                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 434                         .vsel_mask = LDO4OUT_MASK,
 435                         .enable_reg = PCA9450_REG_LDO4CTRL,
 436                         .enable_mask = LDO4_EN_MASK,
 437                         .owner = THIS_MODULE,
 438                 },
 439         },
 440         {
 441                 .desc = {
 442                         .name = "ldo5",
 443                         .of_match = of_match_ptr("LDO5"),
 444                         .regulators_node = of_match_ptr("regulators"),
 445                         .id = PCA9450_LDO5,
 446                         .ops = &pca9450_ldo_regulator_ops,
 447                         .type = REGULATOR_VOLTAGE,
 448                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 449                         .linear_ranges = pca9450_ldo5_volts,
 450                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 451                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 452                         .vsel_mask = LDO5HOUT_MASK,
 453                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 454                         .enable_mask = LDO5H_EN_MASK,
 455                         .owner = THIS_MODULE,
 456                 },
 457         },
 458 };
 459
 460 /*
 461  * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
 462  * on PCA9450C as no Buck3.
 463  */
 464 static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 465         {
 466                 .desc = {
 467                         .name = "buck1",
 468                         .of_match = of_match_ptr("BUCK1"),
 469                         .regulators_node = of_match_ptr("regulators"),
 470                         .id = PCA9450_BUCK1,
 471                         .ops = &pca9450_dvs_buck_regulator_ops,
 472                         .type = REGULATOR_VOLTAGE,
 473                         .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
 474                         .linear_ranges = pca9450_dvs_buck_volts,
 475                         .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
 476                         .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
 477                         .vsel_mask = BUCK1OUT_DVS0_MASK,
 478                         .enable_reg = PCA9450_REG_BUCK1CTRL,
 479                         .enable_mask = BUCK1_ENMODE_MASK,
 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 = BUCK1_ENMODE_MASK,
 505                         .owner = THIS_MODULE,
 506                         .of_parse_cb = pca9450_set_dvs_levels,
 507                 },
 508                 .dvs = {
 509                         .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
 510                         .run_mask = BUCK2OUT_DVS0_MASK,
 511                         .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
 512                         .standby_mask = BUCK2OUT_DVS1_MASK,
 513                 },
 514         },
 515         {
 516                 .desc = {
 517                         .name = "buck4",
 518                         .of_match = of_match_ptr("BUCK4"),
 519                         .regulators_node = of_match_ptr("regulators"),
 520                         .id = PCA9450_BUCK4,
 521                         .ops = &pca9450_buck_regulator_ops,
 522                         .type = REGULATOR_VOLTAGE,
 523                         .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
 524                         .linear_ranges = pca9450_buck_volts,
 525                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 526                         .vsel_reg = PCA9450_REG_BUCK4OUT,
 527                         .vsel_mask = BUCK4OUT_MASK,
 528                         .enable_reg = PCA9450_REG_BUCK4CTRL,
 529                         .enable_mask = BUCK4_ENMODE_MASK,
 530                         .owner = THIS_MODULE,
 531                 },
 532         },
 533         {
 534                 .desc = {
 535                         .name = "buck5",
 536                         .of_match = of_match_ptr("BUCK5"),
 537                         .regulators_node = of_match_ptr("regulators"),
 538                         .id = PCA9450_BUCK5,
 539                         .ops = &pca9450_buck_regulator_ops,
 540                         .type = REGULATOR_VOLTAGE,
 541                         .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
 542                         .linear_ranges = pca9450_buck_volts,
 543                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 544                         .vsel_reg = PCA9450_REG_BUCK5OUT,
 545                         .vsel_mask = BUCK5OUT_MASK,
 546                         .enable_reg = PCA9450_REG_BUCK5CTRL,
 547                         .enable_mask = BUCK5_ENMODE_MASK,
 548                         .owner = THIS_MODULE,
 549                 },
 550         },
 551         {
 552                 .desc = {
 553                         .name = "buck6",
 554                         .of_match = of_match_ptr("BUCK6"),
 555                         .regulators_node = of_match_ptr("regulators"),
 556                         .id = PCA9450_BUCK6,
 557                         .ops = &pca9450_buck_regulator_ops,
 558                         .type = REGULATOR_VOLTAGE,
 559                         .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
 560                         .linear_ranges = pca9450_buck_volts,
 561                         .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
 562                         .vsel_reg = PCA9450_REG_BUCK6OUT,
 563                         .vsel_mask = BUCK6OUT_MASK,
 564                         .enable_reg = PCA9450_REG_BUCK6CTRL,
 565                         .enable_mask = BUCK6_ENMODE_MASK,
 566                         .owner = THIS_MODULE,
 567                 },
 568         },
 569         {
 570                 .desc = {
 571                         .name = "ldo1",
 572                         .of_match = of_match_ptr("LDO1"),
 573                         .regulators_node = of_match_ptr("regulators"),
 574                         .id = PCA9450_LDO1,
 575                         .ops = &pca9450_ldo_regulator_ops,
 576                         .type = REGULATOR_VOLTAGE,
 577                         .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
 578                         .linear_ranges = pca9450_ldo1_volts,
 579                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
 580                         .vsel_reg = PCA9450_REG_LDO1CTRL,
 581                         .vsel_mask = LDO1OUT_MASK,
 582                         .enable_reg = PCA9450_REG_LDO1CTRL,
 583                         .enable_mask = LDO1_EN_MASK,
 584                         .owner = THIS_MODULE,
 585                 },
 586         },
 587         {
 588                 .desc = {
 589                         .name = "ldo2",
 590                         .of_match = of_match_ptr("LDO2"),
 591                         .regulators_node = of_match_ptr("regulators"),
 592                         .id = PCA9450_LDO2,
 593                         .ops = &pca9450_ldo_regulator_ops,
 594                         .type = REGULATOR_VOLTAGE,
 595                         .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
 596                         .linear_ranges = pca9450_ldo2_volts,
 597                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
 598                         .vsel_reg = PCA9450_REG_LDO2CTRL,
 599                         .vsel_mask = LDO2OUT_MASK,
 600                         .enable_reg = PCA9450_REG_LDO2CTRL,
 601                         .enable_mask = LDO2_EN_MASK,
 602                         .owner = THIS_MODULE,
 603                 },
 604         },
 605         {
 606                 .desc = {
 607                         .name = "ldo3",
 608                         .of_match = of_match_ptr("LDO3"),
 609                         .regulators_node = of_match_ptr("regulators"),
 610                         .id = PCA9450_LDO3,
 611                         .ops = &pca9450_ldo_regulator_ops,
 612                         .type = REGULATOR_VOLTAGE,
 613                         .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
 614                         .linear_ranges = pca9450_ldo34_volts,
 615                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 616                         .vsel_reg = PCA9450_REG_LDO3CTRL,
 617                         .vsel_mask = LDO3OUT_MASK,
 618                         .enable_reg = PCA9450_REG_LDO3CTRL,
 619                         .enable_mask = LDO3_EN_MASK,
 620                         .owner = THIS_MODULE,
 621                 },
 622         },
 623         {
 624                 .desc = {
 625                         .name = "ldo4",
 626                         .of_match = of_match_ptr("LDO4"),
 627                         .regulators_node = of_match_ptr("regulators"),
 628                         .id = PCA9450_LDO4,
 629                         .ops = &pca9450_ldo_regulator_ops,
 630                         .type = REGULATOR_VOLTAGE,
 631                         .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
 632                         .linear_ranges = pca9450_ldo34_volts,
 633                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
 634                         .vsel_reg = PCA9450_REG_LDO4CTRL,
 635                         .vsel_mask = LDO4OUT_MASK,
 636                         .enable_reg = PCA9450_REG_LDO4CTRL,
 637                         .enable_mask = LDO4_EN_MASK,
 638                         .owner = THIS_MODULE,
 639                 },
 640         },
 641         {
 642                 .desc = {
 643                         .name = "ldo5",
 644                         .of_match = of_match_ptr("LDO5"),
 645                         .regulators_node = of_match_ptr("regulators"),
 646                         .id = PCA9450_LDO5,
 647                         .ops = &pca9450_ldo_regulator_ops,
 648                         .type = REGULATOR_VOLTAGE,
 649                         .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
 650                         .linear_ranges = pca9450_ldo5_volts,
 651                         .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
 652                         .vsel_reg = PCA9450_REG_LDO5CTRL_H,
 653                         .vsel_mask = LDO5HOUT_MASK,
 654                         .enable_reg = PCA9450_REG_LDO5CTRL_H,
 655                         .enable_mask = LDO5H_EN_MASK,
 656                         .owner = THIS_MODULE,
 657                 },
 658         },
 659 };
 660
 661 static irqreturn_t pca9450_irq_handler(int irq, void *data)
 662 {
 663         struct pca9450 *pca9450 = data;
 664         struct regmap *regmap = pca9450->regmap;
 665         unsigned int status;
 666         int ret;
 667
 668         ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
 669         if (ret < 0) {
 670                 dev_err(pca9450->dev,
 671                         "Failed to read INT1(%d)\n", ret);
 672                 return IRQ_NONE;
 673         }
 674
 675         if (status & IRQ_PWRON)
 676                 dev_warn(pca9450->dev, "PWRON interrupt.\n");
 677
 678         if (status & IRQ_WDOGB)
 679                 dev_warn(pca9450->dev, "WDOGB interrupt.\n");
 680
 681         if (status & IRQ_VR_FLT1)
 682                 dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
 683
 684         if (status & IRQ_VR_FLT2)
 685                 dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
 686
 687         if (status & IRQ_LOWVSYS)
 688                 dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
 689
 690         if (status & IRQ_THERM_105)
 691                 dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
 692
 693         if (status & IRQ_THERM_125)
 694                 dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
 695
 696         return IRQ_HANDLED;
 697 }
 698
 699 static int pca9450_i2c_probe(struct i2c_client *i2c,
 700                              const struct i2c_device_id *id)
 701 {
 702         enum pca9450_chip_type type = (unsigned int)(uintptr_t)
 703                                       of_device_get_match_data(&i2c->dev);
 704         const struct pca9450_regulator_desc     *regulator_desc;
 705         struct regulator_config config = { };
 706         struct pca9450 *pca9450;
 707         unsigned int device_id, i;
 708         int ret;
 709
 710         if (!i2c->irq) {
 711                 dev_err(&i2c->dev, "No IRQ configured?\n");
 712                 return -EINVAL;
 713         }
 714
 715         pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
 716         if (!pca9450)
 717                 return -ENOMEM;
 718
 719         switch (type) {
 720         case PCA9450_TYPE_PCA9450A:
 721                 regulator_desc = pca9450a_regulators;
 722                 pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
 723                 break;
 724         case PCA9450_TYPE_PCA9450BC:
 725                 regulator_desc = pca9450bc_regulators;
 726                 pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
 727                 break;
 728         default:
 729                 dev_err(&i2c->dev, "Unknown device type");
 730                 return -EINVAL;
 731         }
 732
 733         pca9450->irq = i2c->irq;
 734         pca9450->type = type;
 735         pca9450->dev = &i2c->dev;
 736
 737         dev_set_drvdata(&i2c->dev, pca9450);
 738
 739         pca9450->regmap = devm_regmap_init_i2c(i2c,
 740                                                &pca9450_regmap_config);
 741         if (IS_ERR(pca9450->regmap)) {
 742                 dev_err(&i2c->dev, "regmap initialization failed\n");
 743                 return PTR_ERR(pca9450->regmap);
 744         }
 745
 746         ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
 747         if (ret) {
 748                 dev_err(&i2c->dev, "Read device id error\n");
 749                 return ret;
 750         }
 751
 752         /* Check your board and dts for match the right pmic */
 753         if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
 754             ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
 755                 dev_err(&i2c->dev, "Device id(%x) mismatched\n",
 756                         device_id >> 4);
 757                 return -EINVAL;
 758         }
 759
 760         for (i = 0; i < pca9450->rcnt; i++) {
 761                 const struct regulator_desc *desc;
 762                 struct regulator_dev *rdev;
 763                 const struct pca9450_regulator_desc *r;
 764
 765                 r = &regulator_desc[i];
 766                 desc = &r->desc;
 767
 768                 config.regmap = pca9450->regmap;
 769                 config.dev = pca9450->dev;
 770
 771                 rdev = devm_regulator_register(pca9450->dev, desc, &config);
 772                 if (IS_ERR(rdev)) {
 773                         ret = PTR_ERR(rdev);
 774                         dev_err(pca9450->dev,
 775                                 "Failed to register regulator(%s): %d\n",
 776                                 desc->name, ret);
 777                         return ret;
 778                 }
 779         }
 780
 781         ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
 782                                         pca9450_irq_handler,
 783                                         (IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
 784                                         "pca9450-irq", pca9450);
 785         if (ret != 0) {
 786                 dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
 787                         pca9450->irq);
 788                 return ret;
 789         }
 790         /* Unmask all interrupt except PWRON/WDOG/RSVD */
 791         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
 792                                 IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
 793                                 IRQ_THERM_105 | IRQ_THERM_125,
 794                                 IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
 795         if (ret) {
 796                 dev_err(&i2c->dev, "Unmask irq error\n");
 797                 return ret;
 798         }
 799
 800         /* Set reset behavior on assertion of WDOG_B signal */
 801         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
 802                                 WDOG_B_CFG_MASK, WDOG_B_CFG_COLD_LDO12);
 803         if (ret) {
 804                 dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
 805                 return ret;
 806         }
 807
 808         /*
 809          * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
 810          * This is only valid if the SD_VSEL input of the PMIC is high. Let's
 811          * check if the pin is available as GPIO and set it to high.
 812          */
 813         pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
 814
 815         if (IS_ERR(pca9450->sd_vsel_gpio)) {
 816                 dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
 817                 return ret;
 818         }
 819
 820         dev_info(&i2c->dev, "%s probed.\n",
 821                 type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
 822
 823         return 0;
 824 }
 825
 826 static const struct of_device_id pca9450_of_match[] = {
 827         {
 828                 .compatible = "nxp,pca9450a",
 829                 .data = (void *)PCA9450_TYPE_PCA9450A,
 830         },
 831         {
 832                 .compatible = "nxp,pca9450b",
 833                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 834         },
 835         {
 836                 .compatible = "nxp,pca9450c",
 837                 .data = (void *)PCA9450_TYPE_PCA9450BC,
 838         },
 839         { }
 840 };
 841 MODULE_DEVICE_TABLE(of, pca9450_of_match);
 842
 843 static struct i2c_driver pca9450_i2c_driver = {
 844         .driver = {
 845                 .name = "nxp-pca9450",
 846                 .of_match_table = pca9450_of_match,
 847         },
 848         .probe = pca9450_i2c_probe,
 849 };
 850
 851 module_i2c_driver(pca9450_i2c_driver);
 852
 853 MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
 854 MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
 855 MODULE_LICENSE("GPL");