drivers/regulator/da9121-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // DA9121 Single-channel dual-phase 10A buck converter
   4 //
   5 // Copyright (C) 2020 Axis Communications AB
   6 //
   7 // DA9130 Single-channel dual-phase 10A buck converter (Automotive)
   8 // DA9217 Single-channel dual-phase  6A buck converter
   9 // DA9122 Dual-channel single-phase  5A buck converter
  10 // DA9131 Dual-channel single-phase  5A buck converter (Automotive)
  11 // DA9220 Dual-channel single-phase  3A buck converter
  12 // DA9132 Dual-channel single-phase  3A buck converter (Automotive)
  13 //
  14 // Copyright (C) 2020 Dialog Semiconductor
  15
  16 #include <linux/of_device.h>
  17 #include <linux/of_gpio.h>
  18 #include <linux/gpio/consumer.h>
  19 #include <linux/regulator/of_regulator.h>
  20 #include <linux/regulator/machine.h>
  21 #include <linux/regulator/driver.h>
  22 #include <linux/module.h>
  23 #include <linux/regmap.h>
  24 #include <linux/err.h>
  25 #include <linux/i2c.h>
  26 #include <linux/regulator/da9121.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/workqueue.h>
  29
  30 #include "da9121-regulator.h"
  31
  32 /* Chip data */
  33 struct da9121 {
  34         struct device *dev;
  35         struct delayed_work work;
  36         struct da9121_pdata *pdata;
  37         struct regmap *regmap;
  38         struct regulator_dev *rdev[DA9121_IDX_MAX];
  39         unsigned int persistent[2];
  40         unsigned int passive_delay;
  41         int chip_irq;
  42         int variant_id;
  43         int subvariant_id;
  44 };
  45
  46 /* Define ranges for different variants, enabling translation to/from
  47  * registers. Maximums give scope to allow for transients.
  48  */
  49 struct da9121_range {
  50         int val_min;
  51         int val_max;
  52         int val_stp;
  53         int reg_min;
  54         int reg_max;
  55 };
  56
  57 static struct da9121_range da9121_10A_2phase_current = {
  58         .val_min =  7000000,
  59         .val_max = 20000000,
  60         .val_stp =  1000000,
  61         .reg_min = 1,
  62         .reg_max = 14,
  63 };
  64
  65 static struct da9121_range da9121_6A_2phase_current = {
  66         .val_min =  7000000,
  67         .val_max = 12000000,
  68         .val_stp =  1000000,
  69         .reg_min = 1,
  70         .reg_max = 6,
  71 };
  72
  73 static struct da9121_range da9121_5A_1phase_current = {
  74         .val_min =  3500000,
  75         .val_max = 10000000,
  76         .val_stp =   500000,
  77         .reg_min = 1,
  78         .reg_max = 14,
  79 };
  80
  81 static struct da9121_range da9121_3A_1phase_current = {
  82         .val_min = 3500000,
  83         .val_max = 6000000,
  84         .val_stp =  500000,
  85         .reg_min = 1,
  86         .reg_max = 6,
  87 };
  88
  89 struct da9121_variant_info {
  90         int num_bucks;
  91         int num_phases;
  92         struct da9121_range *current_range;
  93 };
  94
  95 static const struct da9121_variant_info variant_parameters[] = {
  96         { 1, 2, &da9121_10A_2phase_current },   //DA9121_TYPE_DA9121_DA9130
  97         { 2, 1, &da9121_3A_1phase_current  },   //DA9121_TYPE_DA9220_DA9132
  98         { 2, 1, &da9121_5A_1phase_current  },   //DA9121_TYPE_DA9122_DA9131
  99         { 1, 2, &da9121_6A_2phase_current  },   //DA9121_TYPE_DA9217
 100 };
 101
 102 struct da9121_field {
 103         unsigned int reg;
 104         unsigned int msk;
 105 };
 106
 107 static const struct da9121_field da9121_current_field[2] = {
 108         { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 109         { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 110 };
 111
 112 static const struct da9121_field da9121_mode_field[2] = {
 113         { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
 114         { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
 115 };
 116
 117 struct status_event_data {
 118         int buck_id; /* 0=core, 1/2-buck */
 119         int reg_index;  /* index for status/event/mask register selection */
 120         int status_bit; /* bit masks... */
 121         int event_bit;
 122         int mask_bit;
 123         unsigned long notification; /* Notification for status inception */
 124         char *warn; /* if NULL, notify - otherwise dev_warn this string */
 125 };
 126
 127 #define DA9121_STATUS(id, bank, name, notification, warning) \
 128         { id, bank, \
 129         DA9121_MASK_SYS_STATUS_##bank##_##name, \
 130         DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
 131         DA9121_MASK_SYS_MASK_##bank##_M_##name, \
 132         notification, warning }
 133
 134 /* For second buck related event bits that are specific to DA9122, DA9220 variants */
 135 #define DA9xxx_STATUS(id, bank, name, notification, warning) \
 136         { id, bank, \
 137         DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
 138         DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
 139         DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
 140         notification, warning }
 141
 142 /* The status signals that may need servicing, depending on device variant.
 143  * After assertion, they persist; so event is notified, the IRQ disabled,
 144  * and status polled until clear again and IRQ is reenabled.
 145  *
 146  * SG/PG1/PG2 should be set when device first powers up and should never
 147  * re-occur. When this driver starts, it is expected that these will have
 148  * self-cleared for when the IRQs are enabled, so these should never be seen.
 149  * If seen, the implication is that the device has reset.
 150  *
 151  * GPIO0/1/2 are not configured for use by default, so should not be seen.
 152  */
 153 static const struct status_event_data status_event_handling[] = {
 154         DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
 155         DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
 156         DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
 157         DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
 158         DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
 159         DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
 160         DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
 161         DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
 162         DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
 163         DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
 164         DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
 165         DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
 166         DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
 167         DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
 168 };
 169
 170 static int da9121_get_current_limit(struct regulator_dev *rdev)
 171 {
 172         struct da9121 *chip = rdev_get_drvdata(rdev);
 173         int id = rdev_get_id(rdev);
 174         struct da9121_range *range =
 175                 variant_parameters[chip->variant_id].current_range;
 176         unsigned int val = 0;
 177         int ret = 0;
 178
 179         ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
 180         if (ret < 0) {
 181                 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
 182                 goto error;
 183         }
 184
 185         if (val < range->reg_min) {
 186                 ret = -EACCES;
 187                 goto error;
 188         }
 189
 190         if (val > range->reg_max) {
 191                 ret = -EINVAL;
 192                 goto error;
 193         }
 194
 195         return range->val_min + (range->val_stp * (val - range->reg_min));
 196 error:
 197         return ret;
 198 }
 199
 200 static int da9121_ceiling_selector(struct regulator_dev *rdev,
 201                 int min, int max,
 202                 unsigned int *selector)
 203 {
 204         struct da9121 *chip = rdev_get_drvdata(rdev);
 205         struct da9121_range *range =
 206                 variant_parameters[chip->variant_id].current_range;
 207         unsigned int level;
 208         unsigned int i = 0;
 209         unsigned int sel = 0;
 210         int ret = 0;
 211
 212         if (range->val_min > max || range->val_max < min) {
 213                 dev_err(chip->dev,
 214                         "Requested current out of regulator capability\n");
 215                 ret = -EINVAL;
 216                 goto error;
 217         }
 218
 219         level = range->val_max;
 220         for (i = range->reg_max; i >= range->reg_min; i--) {
 221                 if (level <= max) {
 222                         sel = i;
 223                         break;
 224                 }
 225                 level -= range->val_stp;
 226         }
 227
 228         if (level < min) {
 229                 dev_err(chip->dev,
 230                         "Best match falls below minimum requested current\n");
 231                 ret = -EINVAL;
 232                 goto error;
 233         }
 234
 235         *selector = sel;
 236 error:
 237         return ret;
 238 }
 239
 240 static int da9121_set_current_limit(struct regulator_dev *rdev,
 241                                 int min_ua, int max_ua)
 242 {
 243         struct da9121 *chip = rdev_get_drvdata(rdev);
 244         int id = rdev_get_id(rdev);
 245         struct da9121_range *range =
 246                 variant_parameters[chip->variant_id].current_range;
 247         unsigned int sel = 0;
 248         int ret = 0;
 249
 250         if (min_ua < range->val_min ||
 251             max_ua > range->val_max) {
 252                 ret = -EINVAL;
 253                 goto error;
 254         }
 255
 256         if (rdev->desc->ops->is_enabled(rdev)) {
 257                 ret = -EBUSY;
 258                 goto error;
 259         }
 260
 261         ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
 262         if (ret < 0)
 263                 goto error;
 264
 265         ret = regmap_update_bits(chip->regmap,
 266                                 da9121_current_field[id].reg,
 267                                 da9121_current_field[id].msk,
 268                                 (unsigned int)sel);
 269         if (ret < 0)
 270                 dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
 271
 272 error:
 273         return ret;
 274 }
 275
 276 static unsigned int da9121_map_mode(unsigned int mode)
 277 {
 278         switch (mode) {
 279         case DA9121_BUCK_MODE_FORCE_PWM:
 280                 return REGULATOR_MODE_FAST;
 281         case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
 282                 return REGULATOR_MODE_NORMAL;
 283         case DA9121_BUCK_MODE_AUTO:
 284                 return REGULATOR_MODE_IDLE;
 285         case DA9121_BUCK_MODE_FORCE_PFM:
 286                 return REGULATOR_MODE_STANDBY;
 287         default:
 288                 return REGULATOR_MODE_INVALID;
 289         }
 290 }
 291
 292 static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
 293 {
 294         struct da9121 *chip = rdev_get_drvdata(rdev);
 295         int id = rdev_get_id(rdev);
 296         unsigned int val;
 297
 298         switch (mode) {
 299         case REGULATOR_MODE_FAST:
 300                 val = DA9121_BUCK_MODE_FORCE_PWM;
 301                 break;
 302         case REGULATOR_MODE_NORMAL:
 303                 val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
 304                 break;
 305         case REGULATOR_MODE_IDLE:
 306                 val = DA9121_BUCK_MODE_AUTO;
 307                 break;
 308         case REGULATOR_MODE_STANDBY:
 309                 val = DA9121_BUCK_MODE_FORCE_PFM;
 310                 break;
 311         default:
 312                 return -EINVAL;
 313         }
 314
 315         return regmap_update_bits(chip->regmap,
 316                                   da9121_mode_field[id].reg,
 317                                   da9121_mode_field[id].msk,
 318                                   val);
 319 }
 320
 321 static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
 322 {
 323         struct da9121 *chip = rdev_get_drvdata(rdev);
 324         int id = rdev_get_id(rdev);
 325         unsigned int val, mode;
 326         int ret = 0;
 327
 328         ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
 329         if (ret < 0) {
 330                 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
 331                 return -EINVAL;
 332         }
 333
 334         mode = da9121_map_mode(val & da9121_mode_field[id].msk);
 335         if (mode == REGULATOR_MODE_INVALID)
 336                 return -EINVAL;
 337
 338         return mode;
 339 }
 340
 341 static const struct regulator_ops da9121_buck_ops = {
 342         .enable = regulator_enable_regmap,
 343         .disable = regulator_disable_regmap,
 344         .is_enabled = regulator_is_enabled_regmap,
 345         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 346         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 347         .list_voltage = regulator_list_voltage_linear,
 348         .get_current_limit = da9121_get_current_limit,
 349         .set_current_limit = da9121_set_current_limit,
 350         .set_mode = da9121_buck_set_mode,
 351         .get_mode = da9121_buck_get_mode,
 352 };
 353
 354 static struct of_regulator_match da9121_matches[] = {
 355         [DA9121_IDX_BUCK1] = { .name = "buck1" },
 356         [DA9121_IDX_BUCK2] = { .name = "buck2" },
 357 };
 358
 359 static int da9121_of_parse_cb(struct device_node *np,
 360                                 const struct regulator_desc *desc,
 361                                 struct regulator_config *config)
 362 {
 363         struct da9121 *chip = config->driver_data;
 364         struct da9121_pdata *pdata;
 365         struct gpio_desc *ena_gpiod;
 366
 367         if (chip->pdata == NULL) {
 368                 pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
 369                 if (!pdata)
 370                         return -ENOMEM;
 371         } else {
 372                 pdata = chip->pdata;
 373         }
 374
 375         pdata->num_buck++;
 376
 377         if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
 378                 dev_err(chip->dev, "Error: excessive regulators for device\n");
 379                 return -ENODEV;
 380         }
 381
 382         ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
 383                                                 GPIOD_OUT_HIGH |
 384                                                 GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 385                                                 "da9121-enable");
 386         if (!IS_ERR(ena_gpiod))
 387                 config->ena_gpiod = ena_gpiod;
 388
 389         if (variant_parameters[chip->variant_id].num_bucks == 2) {
 390                 uint32_t ripple_cancel;
 391                 uint32_t ripple_reg;
 392                 int ret;
 393
 394                 if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
 395                                 "dlg,ripple-cancel", &ripple_cancel)) {
 396                         if (pdata->num_buck > 1)
 397                                 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
 398                         else
 399                                 ripple_reg = DA9121_REG_BUCK_BUCK1_7;
 400
 401                         ret = regmap_update_bits(chip->regmap, ripple_reg,
 402                                 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
 403                                 ripple_cancel);
 404                         if (ret < 0)
 405                                 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
 406                 }
 407         }
 408
 409         return 0;
 410 }
 411
 412 #define DA9121_MIN_MV           300
 413 #define DA9121_MAX_MV           1900
 414 #define DA9121_STEP_MV          10
 415 #define DA9121_MIN_SEL          (DA9121_MIN_MV / DA9121_STEP_MV)
 416 #define DA9121_N_VOLTAGES       (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
 417                                  + 1 + DA9121_MIN_SEL)
 418
 419 static const struct regulator_desc da9121_reg = {
 420         .id = DA9121_IDX_BUCK1,
 421         .name = "da9121",
 422         .of_match = "buck1",
 423         .of_parse_cb = da9121_of_parse_cb,
 424         .owner = THIS_MODULE,
 425         .regulators_node = of_match_ptr("regulators"),
 426         .of_map_mode = da9121_map_mode,
 427         .ops = &da9121_buck_ops,
 428         .type = REGULATOR_VOLTAGE,
 429         .n_voltages = DA9121_N_VOLTAGES,
 430         .min_uV = DA9121_MIN_MV * 1000,
 431         .uV_step = DA9121_STEP_MV * 1000,
 432         .linear_min_sel = DA9121_MIN_SEL,
 433         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 434         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 435         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 436         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 437         /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
 438         .ramp_delay = 20000,
 439         /* tBUCK_EN */
 440         .enable_time = 20,
 441 };
 442
 443 static const struct regulator_desc da9220_reg[2] = {
 444         {
 445                 .id = DA9121_IDX_BUCK1,
 446                 .name = "DA9220/DA9132 BUCK1",
 447                 .of_match = "buck1",
 448                 .of_parse_cb = da9121_of_parse_cb,
 449                 .owner = THIS_MODULE,
 450                 .regulators_node = of_match_ptr("regulators"),
 451                 .of_map_mode = da9121_map_mode,
 452                 .ops = &da9121_buck_ops,
 453                 .type = REGULATOR_VOLTAGE,
 454                 .n_voltages = DA9121_N_VOLTAGES,
 455                 .min_uV = DA9121_MIN_MV * 1000,
 456                 .uV_step = DA9121_STEP_MV * 1000,
 457                 .linear_min_sel = DA9121_MIN_SEL,
 458                 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 459                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 460                 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 461                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 462         },
 463         {
 464                 .id = DA9121_IDX_BUCK2,
 465                 .name = "DA9220/DA9132 BUCK2",
 466                 .of_match = "buck2",
 467                 .of_parse_cb = da9121_of_parse_cb,
 468                 .owner = THIS_MODULE,
 469                 .regulators_node = of_match_ptr("regulators"),
 470                 .of_map_mode = da9121_map_mode,
 471                 .ops = &da9121_buck_ops,
 472                 .type = REGULATOR_VOLTAGE,
 473                 .n_voltages = DA9121_N_VOLTAGES,
 474                 .min_uV = DA9121_MIN_MV * 1000,
 475                 .uV_step = DA9121_STEP_MV * 1000,
 476                 .linear_min_sel = DA9121_MIN_SEL,
 477                 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
 478                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 479                 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
 480                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 481         }
 482 };
 483
 484 static const struct regulator_desc da9122_reg[2] = {
 485         {
 486                 .id = DA9121_IDX_BUCK1,
 487                 .name = "DA9122/DA9131 BUCK1",
 488                 .of_match = "buck1",
 489                 .of_parse_cb = da9121_of_parse_cb,
 490                 .owner = THIS_MODULE,
 491                 .regulators_node = of_match_ptr("regulators"),
 492                 .of_map_mode = da9121_map_mode,
 493                 .ops = &da9121_buck_ops,
 494                 .type = REGULATOR_VOLTAGE,
 495                 .n_voltages = DA9121_N_VOLTAGES,
 496                 .min_uV = DA9121_MIN_MV * 1000,
 497                 .uV_step = DA9121_STEP_MV * 1000,
 498                 .linear_min_sel = DA9121_MIN_SEL,
 499                 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 500                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 501                 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 502                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 503         },
 504         {
 505                 .id = DA9121_IDX_BUCK2,
 506                 .name = "DA9122/DA9131 BUCK2",
 507                 .of_match = "buck2",
 508                 .of_parse_cb = da9121_of_parse_cb,
 509                 .owner = THIS_MODULE,
 510                 .regulators_node = of_match_ptr("regulators"),
 511                 .of_map_mode = da9121_map_mode,
 512                 .ops = &da9121_buck_ops,
 513                 .type = REGULATOR_VOLTAGE,
 514                 .n_voltages = DA9121_N_VOLTAGES,
 515                 .min_uV = DA9121_MIN_MV * 1000,
 516                 .uV_step = DA9121_STEP_MV * 1000,
 517                 .linear_min_sel = DA9121_MIN_SEL,
 518                 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
 519                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 520                 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
 521                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 522         }
 523 };
 524
 525 static const struct regulator_desc da9217_reg = {
 526         .id = DA9121_IDX_BUCK1,
 527         .name = "DA9217 BUCK1",
 528         .of_match = "buck1",
 529         .of_parse_cb = da9121_of_parse_cb,
 530         .owner = THIS_MODULE,
 531         .regulators_node = of_match_ptr("regulators"),
 532         .of_map_mode = da9121_map_mode,
 533         .ops = &da9121_buck_ops,
 534         .type = REGULATOR_VOLTAGE,
 535         .n_voltages = DA9121_N_VOLTAGES,
 536         .min_uV = DA9121_MIN_MV * 1000,
 537         .uV_step = DA9121_STEP_MV * 1000,
 538         .linear_min_sel = DA9121_MIN_SEL,
 539         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 540         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 541         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 542         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 543 };
 544
 545 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
 546         [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
 547         [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
 548         [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
 549         [DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
 550 };
 551
 552 static void da9121_status_poll_on(struct work_struct *work)
 553 {
 554         struct da9121 *chip = container_of(work, struct da9121, work.work);
 555         int status[3] = {0};
 556         int clear[3] = {0};
 557         unsigned long delay;
 558         int i;
 559         int ret;
 560
 561         ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
 562         if (ret < 0) {
 563                 dev_err(chip->dev,
 564                         "Failed to read STATUS registers: %d\n", ret);
 565                 goto error;
 566         }
 567
 568         /* Possible events are tested to be within range for the variant, potentially
 569          * masked by the IRQ handler (not just warned about), as having been masked,
 570          * and the respective state cleared - then flagged to unmask for next IRQ.
 571          */
 572         for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
 573                 const struct status_event_data *item = &status_event_handling[i];
 574                 int reg_idx = item->reg_index;
 575                 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
 576                 bool supported = (item->warn == NULL);
 577                 bool persisting = (chip->persistent[reg_idx] & item->event_bit);
 578                 bool now_cleared = !(status[reg_idx] & item->status_bit);
 579
 580                 if (relevant && supported && persisting && now_cleared) {
 581                         clear[reg_idx] |= item->mask_bit;
 582                         chip->persistent[reg_idx] &= ~item->event_bit;
 583                 }
 584         }
 585
 586         for (i = 0; i < 2; i++) {
 587                 if (clear[i]) {
 588                         unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
 589                         unsigned int mbit = clear[i];
 590
 591                         ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
 592                         if (ret < 0) {
 593                                 dev_err(chip->dev,
 594                                         "Failed to unmask 0x%02x %d\n",
 595                                         reg, ret);
 596                                 goto error;
 597                         }
 598                 }
 599         }
 600
 601         if (chip->persistent[0] | chip->persistent[1]) {
 602                 delay = msecs_to_jiffies(chip->passive_delay);
 603                 queue_delayed_work(system_freezable_wq, &chip->work, delay);
 604         }
 605
 606 error:
 607         return;
 608 }
 609
 610 static irqreturn_t da9121_irq_handler(int irq, void *data)
 611 {
 612         struct da9121 *chip = data;
 613         struct regulator_dev *rdev;
 614         int event[3] = {0};
 615         int handled[3] = {0};
 616         int mask[3] = {0};
 617         int ret = IRQ_NONE;
 618         int i;
 619         int err;
 620
 621         err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
 622         if (err < 0) {
 623                 dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
 624                 ret = IRQ_NONE;
 625                 goto error;
 626         }
 627
 628         err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
 629         if (err < 0) {
 630                 dev_err(chip->dev,
 631                         "Failed to read MASK registers: %d\n", ret);
 632                 ret = IRQ_NONE;
 633                 goto error;
 634         }
 635
 636         rdev = chip->rdev[DA9121_IDX_BUCK1];
 637
 638         /* Possible events are tested to be within range for the variant, currently
 639          * enabled, and having triggered this IRQ. The event may then be notified,
 640          * or a warning given for unexpected events - those from device POR, and
 641          * currently unsupported GPIO configurations.
 642          */
 643         for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
 644                 const struct status_event_data *item = &status_event_handling[i];
 645                 int reg_idx = item->reg_index;
 646                 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
 647                 bool enabled = !(mask[reg_idx] & item->mask_bit);
 648                 bool active = (event[reg_idx] & item->event_bit);
 649                 bool notify = (item->warn == NULL);
 650
 651                 if (relevant && enabled && active) {
 652                         if (notify) {
 653                                 chip->persistent[reg_idx] |= item->event_bit;
 654                                 regulator_notifier_call_chain(rdev, item->notification, NULL);
 655                         } else {
 656                                 dev_warn(chip->dev, item->warn);
 657                                 handled[reg_idx] |= item->event_bit;
 658                                 ret = IRQ_HANDLED;
 659                         }
 660                 }
 661         }
 662
 663         for (i = 0; i < 3; i++) {
 664                 if (event[i] != handled[i]) {
 665                         dev_warn(chip->dev,
 666                                 "Unhandled event(s) in bank%d 0x%02x\n", i,
 667                                 event[i] ^ handled[i]);
 668                 }
 669         }
 670
 671         /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
 672         for (i = 0; i < 2; i++) {
 673                 if (handled[i]) {
 674                         unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
 675                         unsigned int mbit = handled[i];
 676
 677                         err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
 678                         if (err < 0) {
 679                                 dev_err(chip->dev,
 680                                         "Failed to mask 0x%02x interrupt %d\n",
 681                                         reg, err);
 682                                 ret = IRQ_NONE;
 683                                 goto error;
 684                         }
 685                 }
 686         }
 687
 688         /* clear the events */
 689         if (handled[0] | handled[1] | handled[2]) {
 690                 err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
 691                 if (err < 0) {
 692                         dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
 693                         ret = IRQ_NONE;
 694                         goto error;
 695                 }
 696         }
 697
 698         queue_delayed_work(system_freezable_wq, &chip->work, 0);
 699 error:
 700         return ret;
 701 }
 702
 703 static int da9121_set_regulator_config(struct da9121 *chip)
 704 {
 705         struct regulator_config config = { };
 706         unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
 707         int ret = 0;
 708         int i;
 709
 710         for (i = 0; i < max_matches; i++) {
 711                 const struct regulator_desc *regl_desc =
 712                         local_da9121_regulators[chip->variant_id][i];
 713
 714                 config.dev = chip->dev;
 715                 config.driver_data = chip;
 716                 config.regmap = chip->regmap;
 717
 718                 chip->rdev[i] = devm_regulator_register(chip->dev,
 719                                         regl_desc, &config);
 720                 if (IS_ERR(chip->rdev[i])) {
 721                         dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
 722                                 regl_desc->name, (i+1), max_matches);
 723                         ret = PTR_ERR(chip->rdev[i]);
 724                         goto error;
 725                 }
 726         }
 727
 728 error:
 729         return ret;
 730 }
 731
 732 /* DA9121 chip register model */
 733 static const struct regmap_range da9121_1ch_readable_ranges[] = {
 734         regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
 735         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 736         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 737         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
 738         regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
 739 };
 740
 741 static const struct regmap_access_table da9121_1ch_readable_table = {
 742         .yes_ranges = da9121_1ch_readable_ranges,
 743         .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
 744 };
 745
 746 static const struct regmap_range da9121_2ch_readable_ranges[] = {
 747         regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
 748         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 749         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 750         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
 751         regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
 752         regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
 753 };
 754
 755 static const struct regmap_access_table da9121_2ch_readable_table = {
 756         .yes_ranges = da9121_2ch_readable_ranges,
 757         .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
 758 };
 759
 760 static const struct regmap_range da9121_1ch_writeable_ranges[] = {
 761         regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
 762         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 763         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 764         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
 765         regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
 766 };
 767
 768 static const struct regmap_access_table da9121_1ch_writeable_table = {
 769         .yes_ranges = da9121_1ch_writeable_ranges,
 770         .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
 771 };
 772
 773 static const struct regmap_range da9121_2ch_writeable_ranges[] = {
 774         regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
 775         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 776         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 777         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
 778         regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
 779         regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
 780         regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
 781 };
 782
 783 static const struct regmap_access_table da9121_2ch_writeable_table = {
 784         .yes_ranges = da9121_2ch_writeable_ranges,
 785         .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
 786 };
 787
 788
 789 static const struct regmap_range da9121_volatile_ranges[] = {
 790         regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
 791         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 792         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
 793 };
 794
 795 static const struct regmap_access_table da9121_volatile_table = {
 796         .yes_ranges = da9121_volatile_ranges,
 797         .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
 798 };
 799
 800 /* DA9121 regmap config for 1 channel variants */
 801 static struct regmap_config da9121_1ch_regmap_config = {
 802         .reg_bits = 8,
 803         .val_bits = 8,
 804         .max_register = DA9121_REG_OTP_CONFIG_ID,
 805         .rd_table = &da9121_1ch_readable_table,
 806         .wr_table = &da9121_1ch_writeable_table,
 807         .volatile_table = &da9121_volatile_table,
 808         .cache_type = REGCACHE_RBTREE,
 809 };
 810
 811 /* DA9121 regmap config for 2 channel variants */
 812 static struct regmap_config da9121_2ch_regmap_config = {
 813         .reg_bits = 8,
 814         .val_bits = 8,
 815         .max_register = DA9121_REG_OTP_CONFIG_ID,
 816         .rd_table = &da9121_2ch_readable_table,
 817         .wr_table = &da9121_2ch_writeable_table,
 818         .volatile_table = &da9121_volatile_table,
 819         .cache_type = REGCACHE_RBTREE,
 820 };
 821
 822 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
 823 {
 824         u32 device_id;
 825         u32 variant_id;
 826         u8 variant_mrc, variant_vrc;
 827         char *type;
 828         bool config_match = false;
 829         int ret = 0;
 830
 831         ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
 832         if (ret < 0) {
 833                 dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
 834                 goto error;
 835         }
 836
 837         ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
 838         if (ret < 0) {
 839                 dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
 840                 goto error;
 841         }
 842
 843         if (device_id != DA9121_DEVICE_ID) {
 844                 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
 845                 ret = -ENODEV;
 846                 goto error;
 847         }
 848
 849         variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
 850
 851         switch (chip->subvariant_id) {
 852         case DA9121_SUBTYPE_DA9121:
 853                 type = "DA9121";
 854                 config_match = (variant_vrc == DA9121_VARIANT_VRC);
 855                 break;
 856         case DA9121_SUBTYPE_DA9130:
 857                 type = "DA9130";
 858                 config_match = (variant_vrc == DA9130_VARIANT_VRC);
 859                 break;
 860         case DA9121_SUBTYPE_DA9220:
 861                 type = "DA9220";
 862                 config_match = (variant_vrc == DA9220_VARIANT_VRC);
 863                 break;
 864         case DA9121_SUBTYPE_DA9132:
 865                 type = "DA9132";
 866                 config_match = (variant_vrc == DA9132_VARIANT_VRC);
 867                 break;
 868         case DA9121_SUBTYPE_DA9122:
 869                 type = "DA9122";
 870                 config_match = (variant_vrc == DA9122_VARIANT_VRC);
 871                 break;
 872         case DA9121_SUBTYPE_DA9131:
 873                 type = "DA9131";
 874                 config_match = (variant_vrc == DA9131_VARIANT_VRC);
 875                 break;
 876         case DA9121_SUBTYPE_DA9217:
 877                 type = "DA9217";
 878                 config_match = (variant_vrc == DA9217_VARIANT_VRC);
 879                 break;
 880         default:
 881                 type = "Unknown";
 882                 break;
 883         }
 884
 885         dev_info(chip->dev,
 886                  "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
 887                  device_id, variant_id, type);
 888
 889         if (!config_match) {
 890                 dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
 891                 ret = -EINVAL;
 892                 goto error;
 893         }
 894
 895         variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
 896                         >> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
 897
 898         if ((device_id == DA9121_DEVICE_ID) &&
 899             (variant_mrc < DA9121_VARIANT_MRC_BASE)) {
 900                 dev_err(chip->dev,
 901                         "Cannot support variant MRC: 0x%02X\n", variant_mrc);
 902                 ret = -EINVAL;
 903         }
 904 error:
 905         return ret;
 906 }
 907
 908 static int da9121_assign_chip_model(struct i2c_client *i2c,
 909                         struct da9121 *chip)
 910 {
 911         struct regmap_config *regmap;
 912         int ret = 0;
 913
 914         chip->dev = &i2c->dev;
 915
 916         /* Use configured subtype to select the regulator descriptor index and
 917          * register map, common to both consumer and automotive grade variants
 918          */
 919         switch (chip->subvariant_id) {
 920         case DA9121_SUBTYPE_DA9121:
 921         case DA9121_SUBTYPE_DA9130:
 922                 chip->variant_id = DA9121_TYPE_DA9121_DA9130;
 923                 regmap = &da9121_1ch_regmap_config;
 924                 break;
 925         case DA9121_SUBTYPE_DA9217:
 926                 chip->variant_id = DA9121_TYPE_DA9217;
 927                 regmap = &da9121_1ch_regmap_config;
 928                 break;
 929         case DA9121_SUBTYPE_DA9122:
 930         case DA9121_SUBTYPE_DA9131:
 931                 chip->variant_id = DA9121_TYPE_DA9122_DA9131;
 932                 regmap = &da9121_2ch_regmap_config;
 933                 break;
 934         case DA9121_SUBTYPE_DA9220:
 935         case DA9121_SUBTYPE_DA9132:
 936                 chip->variant_id = DA9121_TYPE_DA9220_DA9132;
 937                 regmap = &da9121_2ch_regmap_config;
 938                 break;
 939         default:
 940                 return -EINVAL;
 941         }
 942
 943         /* Set these up for of_regulator_match call which may want .of_map_modes */
 944         da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
 945         da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
 946
 947         chip->regmap = devm_regmap_init_i2c(i2c, regmap);
 948         if (IS_ERR(chip->regmap)) {
 949                 ret = PTR_ERR(chip->regmap);
 950                 dev_err(chip->dev, "Failed to configure a register map: %d\n",
 951                         ret);
 952                 return ret;
 953         }
 954
 955         ret = da9121_check_device_type(i2c, chip);
 956
 957         return ret;
 958 }
 959
 960 static int da9121_config_irq(struct i2c_client *i2c,
 961                         struct da9121 *chip)
 962 {
 963         unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
 964         const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
 965         int ret = 0;
 966
 967         chip->chip_irq = i2c->irq;
 968
 969         if (chip->chip_irq != 0) {
 970                 if (!of_property_read_u32(chip->dev->of_node,
 971                                           "dlg,irq-polling-delay-passive-ms",
 972                                           &p_delay)) {
 973                         if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
 974                             p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
 975                                 dev_warn(chip->dev,
 976                                          "Out-of-range polling period %d ms\n",
 977                                          p_delay);
 978                                 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
 979                         }
 980                 }
 981
 982                 chip->passive_delay = p_delay;
 983
 984                 ret = request_threaded_irq(chip->chip_irq, NULL,
 985                                         da9121_irq_handler,
 986                                         IRQF_TRIGGER_LOW|IRQF_ONESHOT,
 987                                         "da9121", chip);
 988                 if (ret != 0) {
 989                         dev_err(chip->dev, "Failed IRQ request: %d\n",
 990                                 chip->chip_irq);
 991                         goto error;
 992                 }
 993
 994                 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
 995                 if (ret != 0) {
 996                         dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
 997                                 ret);
 998                         goto regmap_error;
 999                 }
1000
1001                 INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
1002                 dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
1003                          chip->passive_delay);
1004         }
1005 error:
1006         return ret;
1007 regmap_error:
1008         free_irq(chip->chip_irq, chip);
1009         return ret;
1010 }
1011
1012 static const struct of_device_id da9121_dt_ids[] = {
1013         { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
1014         { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
1015         { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
1016         { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
1017         { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
1018         { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
1019         { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
1020         { }
1021 };
1022 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
1023
1024 static inline int da9121_of_get_id(struct device *dev)
1025 {
1026         const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
1027
1028         if (!id) {
1029                 dev_err(dev, "%s: Failed\n", __func__);
1030                 return -EINVAL;
1031         }
1032         return (uintptr_t)id->data;
1033 }
1034
1035 static int da9121_i2c_probe(struct i2c_client *i2c,
1036                             const struct i2c_device_id *id)
1037 {
1038         struct da9121 *chip;
1039         const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1040         int ret = 0;
1041
1042         chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
1043         if (!chip) {
1044                 ret = -ENOMEM;
1045                 goto error;
1046         }
1047
1048         chip->pdata = i2c->dev.platform_data;
1049         chip->subvariant_id = da9121_of_get_id(&i2c->dev);
1050
1051         ret = da9121_assign_chip_model(i2c, chip);
1052         if (ret < 0)
1053                 goto error;
1054
1055         ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1056         if (ret != 0) {
1057                 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1058                 goto error;
1059         }
1060
1061         ret = da9121_set_regulator_config(chip);
1062         if (ret < 0)
1063                 goto error;
1064
1065         ret = da9121_config_irq(i2c, chip);
1066
1067 error:
1068         return ret;
1069 }
1070
1071 static int da9121_i2c_remove(struct i2c_client *i2c)
1072 {
1073         struct da9121 *chip = i2c_get_clientdata(i2c);
1074         const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1075         int ret = 0;
1076
1077         free_irq(chip->chip_irq, chip);
1078         cancel_delayed_work_sync(&chip->work);
1079
1080         ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1081         if (ret != 0)
1082                 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1083         return ret;
1084 }
1085
1086 static const struct i2c_device_id da9121_i2c_id[] = {
1087         {"da9121", DA9121_TYPE_DA9121_DA9130},
1088         {"da9130", DA9121_TYPE_DA9121_DA9130},
1089         {"da9217", DA9121_TYPE_DA9217},
1090         {"da9122", DA9121_TYPE_DA9122_DA9131},
1091         {"da9131", DA9121_TYPE_DA9122_DA9131},
1092         {"da9220", DA9121_TYPE_DA9220_DA9132},
1093         {"da9132", DA9121_TYPE_DA9220_DA9132},
1094         {},
1095 };
1096 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1097
1098 static struct i2c_driver da9121_regulator_driver = {
1099         .driver = {
1100                 .name = "da9121",
1101                 .of_match_table = of_match_ptr(da9121_dt_ids),
1102         },
1103         .probe = da9121_i2c_probe,
1104         .remove = da9121_i2c_remove,
1105         .id_table = da9121_i2c_id,
1106 };
1107
1108 module_i2c_driver(da9121_regulator_driver);
1109
1110 MODULE_LICENSE("GPL v2");