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 static struct da9121_range da914x_40A_4phase_current = {
  90         .val_min = 26000000,
  91         .val_max = 78000000,
  92         .val_stp =  4000000,
  93         .reg_min = 1,
  94         .reg_max = 14,
  95 };
  96
  97 static struct da9121_range da914x_20A_2phase_current = {
  98         .val_min = 13000000,
  99         .val_max = 39000000,
 100         .val_stp =  2000000,
 101         .reg_min = 1,
 102         .reg_max = 14,
 103 };
 104
 105 struct da9121_variant_info {
 106         int num_bucks;
 107         int num_phases;
 108         struct da9121_range *current_range;
 109 };
 110
 111 static const struct da9121_variant_info variant_parameters[] = {
 112         { 1, 2, &da9121_10A_2phase_current },   //DA9121_TYPE_DA9121_DA9130
 113         { 2, 1, &da9121_3A_1phase_current  },   //DA9121_TYPE_DA9220_DA9132
 114         { 2, 1, &da9121_5A_1phase_current  },   //DA9121_TYPE_DA9122_DA9131
 115         { 1, 2, &da9121_6A_2phase_current  },   //DA9121_TYPE_DA9217
 116         { 1, 4, &da914x_40A_4phase_current },   //DA9121_TYPE_DA9141
 117         { 1, 2, &da914x_20A_2phase_current },   //DA9121_TYPE_DA9142
 118 };
 119
 120 struct da9121_field {
 121         unsigned int reg;
 122         unsigned int msk;
 123 };
 124
 125 static const struct da9121_field da9121_current_field[2] = {
 126         { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 127         { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 128 };
 129
 130 static const struct da9121_field da9121_mode_field[2] = {
 131         { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
 132         { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
 133 };
 134
 135 struct status_event_data {
 136         int buck_id; /* 0=core, 1/2-buck */
 137         int reg_index;  /* index for status/event/mask register selection */
 138         int status_bit; /* bit masks... */
 139         int event_bit;
 140         int mask_bit;
 141         unsigned long notification; /* Notification for status inception */
 142         char *warn; /* if NULL, notify - otherwise dev_warn this string */
 143 };
 144
 145 #define DA9121_STATUS(id, bank, name, notification, warning) \
 146         { id, bank, \
 147         DA9121_MASK_SYS_STATUS_##bank##_##name, \
 148         DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
 149         DA9121_MASK_SYS_MASK_##bank##_M_##name, \
 150         notification, warning }
 151
 152 /* For second buck related event bits that are specific to DA9122, DA9220 variants */
 153 #define DA9xxx_STATUS(id, bank, name, notification, warning) \
 154         { id, bank, \
 155         DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
 156         DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
 157         DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
 158         notification, warning }
 159
 160 /* The status signals that may need servicing, depending on device variant.
 161  * After assertion, they persist; so event is notified, the IRQ disabled,
 162  * and status polled until clear again and IRQ is reenabled.
 163  *
 164  * SG/PG1/PG2 should be set when device first powers up and should never
 165  * re-occur. When this driver starts, it is expected that these will have
 166  * self-cleared for when the IRQs are enabled, so these should never be seen.
 167  * If seen, the implication is that the device has reset.
 168  *
 169  * GPIO0/1/2 are not configured for use by default, so should not be seen.
 170  */
 171 static const struct status_event_data status_event_handling[] = {
 172         DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
 173         DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
 174         DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
 175         DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
 176         DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
 177         DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
 178         DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
 179         DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
 180         DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
 181         DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
 182         DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
 183         DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
 184         DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
 185         DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
 186 };
 187
 188 static int da9121_get_current_limit(struct regulator_dev *rdev)
 189 {
 190         struct da9121 *chip = rdev_get_drvdata(rdev);
 191         int id = rdev_get_id(rdev);
 192         struct da9121_range *range =
 193                 variant_parameters[chip->variant_id].current_range;
 194         unsigned int val = 0;
 195         int ret = 0;
 196
 197         ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
 198         if (ret < 0) {
 199                 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
 200                 goto error;
 201         }
 202
 203         if (val < range->reg_min) {
 204                 ret = -EACCES;
 205                 goto error;
 206         }
 207
 208         if (val > range->reg_max) {
 209                 ret = -EINVAL;
 210                 goto error;
 211         }
 212
 213         return range->val_min + (range->val_stp * (val - range->reg_min));
 214 error:
 215         return ret;
 216 }
 217
 218 static int da9121_ceiling_selector(struct regulator_dev *rdev,
 219                 int min, int max,
 220                 unsigned int *selector)
 221 {
 222         struct da9121 *chip = rdev_get_drvdata(rdev);
 223         struct da9121_range *range =
 224                 variant_parameters[chip->variant_id].current_range;
 225         unsigned int level;
 226         unsigned int i = 0;
 227         unsigned int sel = 0;
 228         int ret = 0;
 229
 230         if (range->val_min > max || range->val_max < min) {
 231                 dev_err(chip->dev,
 232                         "Requested current out of regulator capability\n");
 233                 ret = -EINVAL;
 234                 goto error;
 235         }
 236
 237         level = range->val_max;
 238         for (i = range->reg_max; i >= range->reg_min; i--) {
 239                 if (level <= max) {
 240                         sel = i;
 241                         break;
 242                 }
 243                 level -= range->val_stp;
 244         }
 245
 246         if (level < min) {
 247                 dev_err(chip->dev,
 248                         "Best match falls below minimum requested current\n");
 249                 ret = -EINVAL;
 250                 goto error;
 251         }
 252
 253         *selector = sel;
 254 error:
 255         return ret;
 256 }
 257
 258 static int da9121_set_current_limit(struct regulator_dev *rdev,
 259                                 int min_ua, int max_ua)
 260 {
 261         struct da9121 *chip = rdev_get_drvdata(rdev);
 262         int id = rdev_get_id(rdev);
 263         struct da9121_range *range =
 264                 variant_parameters[chip->variant_id].current_range;
 265         unsigned int sel = 0;
 266         int ret = 0;
 267
 268         if (min_ua < range->val_min ||
 269             max_ua > range->val_max) {
 270                 ret = -EINVAL;
 271                 goto error;
 272         }
 273
 274         if (rdev->desc->ops->is_enabled(rdev)) {
 275                 ret = -EBUSY;
 276                 goto error;
 277         }
 278
 279         ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
 280         if (ret < 0)
 281                 goto error;
 282
 283         ret = regmap_update_bits(chip->regmap,
 284                                 da9121_current_field[id].reg,
 285                                 da9121_current_field[id].msk,
 286                                 (unsigned int)sel);
 287         if (ret < 0)
 288                 dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
 289
 290 error:
 291         return ret;
 292 }
 293
 294 static unsigned int da9121_map_mode(unsigned int mode)
 295 {
 296         switch (mode) {
 297         case DA9121_BUCK_MODE_FORCE_PWM:
 298                 return REGULATOR_MODE_FAST;
 299         case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
 300                 return REGULATOR_MODE_NORMAL;
 301         case DA9121_BUCK_MODE_AUTO:
 302                 return REGULATOR_MODE_IDLE;
 303         case DA9121_BUCK_MODE_FORCE_PFM:
 304                 return REGULATOR_MODE_STANDBY;
 305         default:
 306                 return REGULATOR_MODE_INVALID;
 307         }
 308 }
 309
 310 static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
 311 {
 312         struct da9121 *chip = rdev_get_drvdata(rdev);
 313         int id = rdev_get_id(rdev);
 314         unsigned int val;
 315
 316         switch (mode) {
 317         case REGULATOR_MODE_FAST:
 318                 val = DA9121_BUCK_MODE_FORCE_PWM;
 319                 break;
 320         case REGULATOR_MODE_NORMAL:
 321                 val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
 322                 break;
 323         case REGULATOR_MODE_IDLE:
 324                 val = DA9121_BUCK_MODE_AUTO;
 325                 break;
 326         case REGULATOR_MODE_STANDBY:
 327                 val = DA9121_BUCK_MODE_FORCE_PFM;
 328                 break;
 329         default:
 330                 return -EINVAL;
 331         }
 332
 333         return regmap_update_bits(chip->regmap,
 334                                   da9121_mode_field[id].reg,
 335                                   da9121_mode_field[id].msk,
 336                                   val);
 337 }
 338
 339 static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
 340 {
 341         struct da9121 *chip = rdev_get_drvdata(rdev);
 342         int id = rdev_get_id(rdev);
 343         unsigned int val, mode;
 344         int ret = 0;
 345
 346         ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
 347         if (ret < 0) {
 348                 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
 349                 return -EINVAL;
 350         }
 351
 352         mode = da9121_map_mode(val & da9121_mode_field[id].msk);
 353         if (mode == REGULATOR_MODE_INVALID)
 354                 return -EINVAL;
 355
 356         return mode;
 357 }
 358
 359 static const struct regulator_ops da9121_buck_ops = {
 360         .enable = regulator_enable_regmap,
 361         .disable = regulator_disable_regmap,
 362         .is_enabled = regulator_is_enabled_regmap,
 363         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 364         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 365         .list_voltage = regulator_list_voltage_linear,
 366         .get_current_limit = da9121_get_current_limit,
 367         .set_current_limit = da9121_set_current_limit,
 368         .set_mode = da9121_buck_set_mode,
 369         .get_mode = da9121_buck_get_mode,
 370 };
 371
 372 static struct of_regulator_match da9121_matches[] = {
 373         [DA9121_IDX_BUCK1] = { .name = "buck1" },
 374         [DA9121_IDX_BUCK2] = { .name = "buck2" },
 375 };
 376
 377 static int da9121_of_parse_cb(struct device_node *np,
 378                                 const struct regulator_desc *desc,
 379                                 struct regulator_config *config)
 380 {
 381         struct da9121 *chip = config->driver_data;
 382         struct da9121_pdata *pdata;
 383         struct gpio_desc *ena_gpiod;
 384
 385         if (chip->pdata == NULL) {
 386                 pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
 387                 if (!pdata)
 388                         return -ENOMEM;
 389         } else {
 390                 pdata = chip->pdata;
 391         }
 392
 393         pdata->num_buck++;
 394
 395         if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
 396                 dev_err(chip->dev, "Error: excessive regulators for device\n");
 397                 return -ENODEV;
 398         }
 399
 400         ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
 401                                                 GPIOD_OUT_HIGH |
 402                                                 GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 403                                                 "da9121-enable");
 404         if (!IS_ERR(ena_gpiod))
 405                 config->ena_gpiod = ena_gpiod;
 406
 407         if (variant_parameters[chip->variant_id].num_bucks == 2) {
 408                 uint32_t ripple_cancel;
 409                 uint32_t ripple_reg;
 410                 int ret;
 411
 412                 if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
 413                                 "dlg,ripple-cancel", &ripple_cancel)) {
 414                         if (pdata->num_buck > 1)
 415                                 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
 416                         else
 417                                 ripple_reg = DA9121_REG_BUCK_BUCK1_7;
 418
 419                         ret = regmap_update_bits(chip->regmap, ripple_reg,
 420                                 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
 421                                 ripple_cancel);
 422                         if (ret < 0)
 423                                 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
 424                 }
 425         }
 426
 427         return 0;
 428 }
 429
 430 #define DA9121_MIN_MV           300
 431 #define DA9121_MAX_MV           1900
 432 #define DA9121_STEP_MV          10
 433 #define DA9121_MIN_SEL          (DA9121_MIN_MV / DA9121_STEP_MV)
 434 #define DA9121_N_VOLTAGES       (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
 435                                  + 1 + DA9121_MIN_SEL)
 436
 437 static const struct regulator_desc da9121_reg = {
 438         .id = DA9121_IDX_BUCK1,
 439         .name = "da9121",
 440         .of_match = "buck1",
 441         .of_parse_cb = da9121_of_parse_cb,
 442         .owner = THIS_MODULE,
 443         .regulators_node = of_match_ptr("regulators"),
 444         .of_map_mode = da9121_map_mode,
 445         .ops = &da9121_buck_ops,
 446         .type = REGULATOR_VOLTAGE,
 447         .n_voltages = DA9121_N_VOLTAGES,
 448         .min_uV = DA9121_MIN_MV * 1000,
 449         .uV_step = DA9121_STEP_MV * 1000,
 450         .linear_min_sel = DA9121_MIN_SEL,
 451         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 452         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 453         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 454         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 455         /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
 456         .ramp_delay = 20000,
 457         /* tBUCK_EN */
 458         .enable_time = 20,
 459 };
 460
 461 static const struct regulator_desc da9220_reg[2] = {
 462         {
 463                 .id = DA9121_IDX_BUCK1,
 464                 .name = "DA9220/DA9132 BUCK1",
 465                 .of_match = "buck1",
 466                 .of_parse_cb = da9121_of_parse_cb,
 467                 .owner = THIS_MODULE,
 468                 .regulators_node = of_match_ptr("regulators"),
 469                 .of_map_mode = da9121_map_mode,
 470                 .ops = &da9121_buck_ops,
 471                 .type = REGULATOR_VOLTAGE,
 472                 .n_voltages = DA9121_N_VOLTAGES,
 473                 .min_uV = DA9121_MIN_MV * 1000,
 474                 .uV_step = DA9121_STEP_MV * 1000,
 475                 .linear_min_sel = DA9121_MIN_SEL,
 476                 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 477                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 478                 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 479                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 480         },
 481         {
 482                 .id = DA9121_IDX_BUCK2,
 483                 .name = "DA9220/DA9132 BUCK2",
 484                 .of_match = "buck2",
 485                 .of_parse_cb = da9121_of_parse_cb,
 486                 .owner = THIS_MODULE,
 487                 .regulators_node = of_match_ptr("regulators"),
 488                 .of_map_mode = da9121_map_mode,
 489                 .ops = &da9121_buck_ops,
 490                 .type = REGULATOR_VOLTAGE,
 491                 .n_voltages = DA9121_N_VOLTAGES,
 492                 .min_uV = DA9121_MIN_MV * 1000,
 493                 .uV_step = DA9121_STEP_MV * 1000,
 494                 .linear_min_sel = DA9121_MIN_SEL,
 495                 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
 496                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 497                 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
 498                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 499         }
 500 };
 501
 502 static const struct regulator_desc da9122_reg[2] = {
 503         {
 504                 .id = DA9121_IDX_BUCK1,
 505                 .name = "DA9122/DA9131 BUCK1",
 506                 .of_match = "buck1",
 507                 .of_parse_cb = da9121_of_parse_cb,
 508                 .owner = THIS_MODULE,
 509                 .regulators_node = of_match_ptr("regulators"),
 510                 .of_map_mode = da9121_map_mode,
 511                 .ops = &da9121_buck_ops,
 512                 .type = REGULATOR_VOLTAGE,
 513                 .n_voltages = DA9121_N_VOLTAGES,
 514                 .min_uV = DA9121_MIN_MV * 1000,
 515                 .uV_step = DA9121_STEP_MV * 1000,
 516                 .linear_min_sel = DA9121_MIN_SEL,
 517                 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 518                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 519                 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 520                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 521         },
 522         {
 523                 .id = DA9121_IDX_BUCK2,
 524                 .name = "DA9122/DA9131 BUCK2",
 525                 .of_match = "buck2",
 526                 .of_parse_cb = da9121_of_parse_cb,
 527                 .owner = THIS_MODULE,
 528                 .regulators_node = of_match_ptr("regulators"),
 529                 .of_map_mode = da9121_map_mode,
 530                 .ops = &da9121_buck_ops,
 531                 .type = REGULATOR_VOLTAGE,
 532                 .n_voltages = DA9121_N_VOLTAGES,
 533                 .min_uV = DA9121_MIN_MV * 1000,
 534                 .uV_step = DA9121_STEP_MV * 1000,
 535                 .linear_min_sel = DA9121_MIN_SEL,
 536                 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
 537                 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 538                 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
 539                 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 540         }
 541 };
 542
 543 static const struct regulator_desc da9217_reg = {
 544         .id = DA9121_IDX_BUCK1,
 545         .name = "DA9217 BUCK1",
 546         .of_match = "buck1",
 547         .of_parse_cb = da9121_of_parse_cb,
 548         .owner = THIS_MODULE,
 549         .regulators_node = of_match_ptr("regulators"),
 550         .of_map_mode = da9121_map_mode,
 551         .ops = &da9121_buck_ops,
 552         .type = REGULATOR_VOLTAGE,
 553         .n_voltages = DA9121_N_VOLTAGES,
 554         .min_uV = DA9121_MIN_MV * 1000,
 555         .uV_step = DA9121_STEP_MV * 1000,
 556         .linear_min_sel = DA9121_MIN_SEL,
 557         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 558         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 559         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 560         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 561 };
 562
 563 #define DA914X_MIN_MV           500
 564 #define DA914X_MAX_MV           1300
 565 #define DA914X_STEP_MV          10
 566 #define DA914X_MIN_SEL          (DA914X_MIN_MV / DA914X_STEP_MV)
 567 #define DA914X_N_VOLTAGES       (((DA914X_MAX_MV - DA914X_MIN_MV) / DA914X_STEP_MV) \
 568                                  + 1 + DA914X_MIN_SEL)
 569
 570 static const struct regulator_desc da9141_reg = {
 571         .id = DA9121_IDX_BUCK1,
 572         .name = "DA9141",
 573         .of_match = "buck1",
 574         .of_parse_cb = da9121_of_parse_cb,
 575         .owner = THIS_MODULE,
 576         .regulators_node = of_match_ptr("regulators"),
 577         .of_map_mode = da9121_map_mode,
 578         .ops = &da9121_buck_ops,
 579         .type = REGULATOR_VOLTAGE,
 580         .n_voltages = DA914X_N_VOLTAGES,
 581         .min_uV = DA914X_MIN_MV * 1000,
 582         .uV_step = DA914X_STEP_MV * 1000,
 583         .linear_min_sel = DA914X_MIN_SEL,
 584         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 585         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 586         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 587         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 588 };
 589
 590 static const struct regulator_desc da9142_reg = {
 591         .id = DA9121_IDX_BUCK1,
 592         .name = "DA9142 BUCK1",
 593         .of_match = "buck1",
 594         .of_parse_cb = da9121_of_parse_cb,
 595         .owner = THIS_MODULE,
 596         .regulators_node = of_match_ptr("regulators"),
 597         .of_map_mode = da9121_map_mode,
 598         .ops = &da9121_buck_ops,
 599         .type = REGULATOR_VOLTAGE,
 600         .n_voltages = DA914X_N_VOLTAGES,
 601         .min_uV = DA914X_MIN_MV * 1000,
 602         .uV_step = DA914X_STEP_MV * 1000,
 603         .linear_min_sel = DA914X_MIN_SEL,
 604         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
 605         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 606         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 607         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 608 };
 609
 610
 611 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
 612         [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
 613         [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
 614         [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
 615         [DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
 616         [DA9121_TYPE_DA9141] = { &da9141_reg, NULL },
 617         [DA9121_TYPE_DA9142] = { &da9142_reg, NULL },
 618 };
 619
 620 static void da9121_status_poll_on(struct work_struct *work)
 621 {
 622         struct da9121 *chip = container_of(work, struct da9121, work.work);
 623         int status[3] = {0};
 624         int clear[3] = {0};
 625         unsigned long delay;
 626         int i;
 627         int ret;
 628
 629         ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
 630         if (ret < 0) {
 631                 dev_err(chip->dev,
 632                         "Failed to read STATUS registers: %d\n", ret);
 633                 goto error;
 634         }
 635
 636         /* Possible events are tested to be within range for the variant, potentially
 637          * masked by the IRQ handler (not just warned about), as having been masked,
 638          * and the respective state cleared - then flagged to unmask for next IRQ.
 639          */
 640         for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
 641                 const struct status_event_data *item = &status_event_handling[i];
 642                 int reg_idx = item->reg_index;
 643                 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
 644                 bool supported = (item->warn == NULL);
 645                 bool persisting = (chip->persistent[reg_idx] & item->event_bit);
 646                 bool now_cleared = !(status[reg_idx] & item->status_bit);
 647
 648                 if (relevant && supported && persisting && now_cleared) {
 649                         clear[reg_idx] |= item->mask_bit;
 650                         chip->persistent[reg_idx] &= ~item->event_bit;
 651                 }
 652         }
 653
 654         for (i = 0; i < 2; i++) {
 655                 if (clear[i]) {
 656                         unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
 657                         unsigned int mbit = clear[i];
 658
 659                         ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
 660                         if (ret < 0) {
 661                                 dev_err(chip->dev,
 662                                         "Failed to unmask 0x%02x %d\n",
 663                                         reg, ret);
 664                                 goto error;
 665                         }
 666                 }
 667         }
 668
 669         if (chip->persistent[0] | chip->persistent[1]) {
 670                 delay = msecs_to_jiffies(chip->passive_delay);
 671                 queue_delayed_work(system_freezable_wq, &chip->work, delay);
 672         }
 673
 674 error:
 675         return;
 676 }
 677
 678 static irqreturn_t da9121_irq_handler(int irq, void *data)
 679 {
 680         struct da9121 *chip = data;
 681         struct regulator_dev *rdev;
 682         int event[3] = {0};
 683         int handled[3] = {0};
 684         int mask[3] = {0};
 685         int ret = IRQ_NONE;
 686         int i;
 687         int err;
 688
 689         err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
 690         if (err < 0) {
 691                 dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
 692                 ret = IRQ_NONE;
 693                 goto error;
 694         }
 695
 696         err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
 697         if (err < 0) {
 698                 dev_err(chip->dev,
 699                         "Failed to read MASK registers: %d\n", ret);
 700                 ret = IRQ_NONE;
 701                 goto error;
 702         }
 703
 704         rdev = chip->rdev[DA9121_IDX_BUCK1];
 705
 706         /* Possible events are tested to be within range for the variant, currently
 707          * enabled, and having triggered this IRQ. The event may then be notified,
 708          * or a warning given for unexpected events - those from device POR, and
 709          * currently unsupported GPIO configurations.
 710          */
 711         for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
 712                 const struct status_event_data *item = &status_event_handling[i];
 713                 int reg_idx = item->reg_index;
 714                 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
 715                 bool enabled = !(mask[reg_idx] & item->mask_bit);
 716                 bool active = (event[reg_idx] & item->event_bit);
 717                 bool notify = (item->warn == NULL);
 718
 719                 if (relevant && enabled && active) {
 720                         if (notify) {
 721                                 chip->persistent[reg_idx] |= item->event_bit;
 722                                 regulator_notifier_call_chain(rdev, item->notification, NULL);
 723                         } else {
 724                                 dev_warn(chip->dev, item->warn);
 725                                 handled[reg_idx] |= item->event_bit;
 726                                 ret = IRQ_HANDLED;
 727                         }
 728                 }
 729         }
 730
 731         for (i = 0; i < 3; i++) {
 732                 if (event[i] != handled[i]) {
 733                         dev_warn(chip->dev,
 734                                 "Unhandled event(s) in bank%d 0x%02x\n", i,
 735                                 event[i] ^ handled[i]);
 736                 }
 737         }
 738
 739         /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
 740         for (i = 0; i < 2; i++) {
 741                 if (handled[i]) {
 742                         unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
 743                         unsigned int mbit = handled[i];
 744
 745                         err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
 746                         if (err < 0) {
 747                                 dev_err(chip->dev,
 748                                         "Failed to mask 0x%02x interrupt %d\n",
 749                                         reg, err);
 750                                 ret = IRQ_NONE;
 751                                 goto error;
 752                         }
 753                 }
 754         }
 755
 756         /* clear the events */
 757         if (handled[0] | handled[1] | handled[2]) {
 758                 err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
 759                 if (err < 0) {
 760                         dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
 761                         ret = IRQ_NONE;
 762                         goto error;
 763                 }
 764         }
 765
 766         queue_delayed_work(system_freezable_wq, &chip->work, 0);
 767 error:
 768         return ret;
 769 }
 770
 771 static int da9121_set_regulator_config(struct da9121 *chip)
 772 {
 773         struct regulator_config config = { };
 774         unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
 775         int ret = 0;
 776         int i;
 777
 778         for (i = 0; i < max_matches; i++) {
 779                 const struct regulator_desc *regl_desc =
 780                         local_da9121_regulators[chip->variant_id][i];
 781
 782                 config.dev = chip->dev;
 783                 config.driver_data = chip;
 784                 config.regmap = chip->regmap;
 785
 786                 chip->rdev[i] = devm_regulator_register(chip->dev,
 787                                         regl_desc, &config);
 788                 if (IS_ERR(chip->rdev[i])) {
 789                         dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
 790                                 regl_desc->name, (i+1), max_matches);
 791                         ret = PTR_ERR(chip->rdev[i]);
 792                         goto error;
 793                 }
 794         }
 795
 796 error:
 797         return ret;
 798 }
 799
 800 /* DA9121 chip register model */
 801 static const struct regmap_range da9121_1ch_readable_ranges[] = {
 802         regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
 803         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 804         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 805         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
 806         regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
 807 };
 808
 809 static const struct regmap_access_table da9121_1ch_readable_table = {
 810         .yes_ranges = da9121_1ch_readable_ranges,
 811         .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
 812 };
 813
 814 static const struct regmap_range da9121_2ch_readable_ranges[] = {
 815         regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
 816         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 817         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 818         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
 819         regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
 820         regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
 821 };
 822
 823 static const struct regmap_access_table da9121_2ch_readable_table = {
 824         .yes_ranges = da9121_2ch_readable_ranges,
 825         .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
 826 };
 827
 828 static const struct regmap_range da9121_1ch_writeable_ranges[] = {
 829         regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
 830         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 831         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 832         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
 833         regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
 834 };
 835
 836 static const struct regmap_access_table da9121_1ch_writeable_table = {
 837         .yes_ranges = da9121_1ch_writeable_ranges,
 838         .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
 839 };
 840
 841 static const struct regmap_range da9121_2ch_writeable_ranges[] = {
 842         regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
 843         regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 844         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 845         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
 846         regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
 847         regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
 848         regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
 849 };
 850
 851 static const struct regmap_access_table da9121_2ch_writeable_table = {
 852         .yes_ranges = da9121_2ch_writeable_ranges,
 853         .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
 854 };
 855
 856
 857 static const struct regmap_range da9121_volatile_ranges[] = {
 858         regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
 859         regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 860         regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
 861 };
 862
 863 static const struct regmap_access_table da9121_volatile_table = {
 864         .yes_ranges = da9121_volatile_ranges,
 865         .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
 866 };
 867
 868 /* DA9121 regmap config for 1 channel variants */
 869 static struct regmap_config da9121_1ch_regmap_config = {
 870         .reg_bits = 8,
 871         .val_bits = 8,
 872         .max_register = DA9121_REG_OTP_CONFIG_ID,
 873         .rd_table = &da9121_1ch_readable_table,
 874         .wr_table = &da9121_1ch_writeable_table,
 875         .volatile_table = &da9121_volatile_table,
 876         .cache_type = REGCACHE_RBTREE,
 877 };
 878
 879 /* DA9121 regmap config for 2 channel variants */
 880 static struct regmap_config da9121_2ch_regmap_config = {
 881         .reg_bits = 8,
 882         .val_bits = 8,
 883         .max_register = DA9121_REG_OTP_CONFIG_ID,
 884         .rd_table = &da9121_2ch_readable_table,
 885         .wr_table = &da9121_2ch_writeable_table,
 886         .volatile_table = &da9121_volatile_table,
 887         .cache_type = REGCACHE_RBTREE,
 888 };
 889
 890 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
 891 {
 892         u32 device_id;
 893         u32 variant_id;
 894         u8 variant_mrc, variant_vrc;
 895         char *type;
 896         bool config_match = false;
 897         int ret = 0;
 898
 899         ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
 900         if (ret < 0) {
 901                 dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
 902                 goto error;
 903         }
 904
 905         ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
 906         if (ret < 0) {
 907                 dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
 908                 goto error;
 909         }
 910
 911         if ((device_id != DA9121_DEVICE_ID) && (device_id != DA914x_DEVICE_ID)) {
 912                 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
 913                 ret = -ENODEV;
 914                 goto error;
 915         }
 916
 917         variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
 918
 919         switch (chip->subvariant_id) {
 920         case DA9121_SUBTYPE_DA9121:
 921                 type = "DA9121";
 922                 config_match = (variant_vrc == DA9121_VARIANT_VRC);
 923                 break;
 924         case DA9121_SUBTYPE_DA9130:
 925                 type = "DA9130";
 926                 config_match = (variant_vrc == DA9130_VARIANT_VRC);
 927                 break;
 928         case DA9121_SUBTYPE_DA9220:
 929                 type = "DA9220";
 930                 config_match = (variant_vrc == DA9220_VARIANT_VRC);
 931                 break;
 932         case DA9121_SUBTYPE_DA9132:
 933                 type = "DA9132";
 934                 config_match = (variant_vrc == DA9132_VARIANT_VRC);
 935                 break;
 936         case DA9121_SUBTYPE_DA9122:
 937                 type = "DA9122";
 938                 config_match = (variant_vrc == DA9122_VARIANT_VRC);
 939                 break;
 940         case DA9121_SUBTYPE_DA9131:
 941                 type = "DA9131";
 942                 config_match = (variant_vrc == DA9131_VARIANT_VRC);
 943                 break;
 944         case DA9121_SUBTYPE_DA9217:
 945                 type = "DA9217";
 946                 config_match = (variant_vrc == DA9217_VARIANT_VRC);
 947                 break;
 948         default:
 949                 type = "Unknown";
 950                 break;
 951         }
 952
 953         if (device_id == DA914x_DEVICE_ID) {
 954                 switch (chip->subvariant_id) {
 955                 case DA9121_SUBTYPE_DA9141:
 956                         type = "DA9141";
 957                         config_match = (variant_vrc == DA9141_VARIANT_VRC);
 958                         break;
 959                 case DA9121_SUBTYPE_DA9142:
 960                         type = "DA9142";
 961                         config_match = (variant_vrc == DA9142_VARIANT_VRC);
 962                         break;
 963                 default:
 964                         type = "Unknown";
 965                         break;
 966                 }
 967         }
 968
 969         dev_info(chip->dev,
 970                  "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
 971                  device_id, variant_id, type);
 972
 973         if (!config_match) {
 974                 dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
 975                 ret = -EINVAL;
 976                 goto error;
 977         }
 978
 979         variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
 980                         >> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
 981
 982         if (((device_id == DA9121_DEVICE_ID) &&
 983              (variant_mrc < DA9121_VARIANT_MRC_BASE)) ||
 984             ((device_id == DA914x_DEVICE_ID) &&
 985              (variant_mrc != DA914x_VARIANT_MRC_BASE))) {
 986                 dev_err(chip->dev,
 987                         "Cannot support variant MRC: 0x%02X\n", variant_mrc);
 988                 ret = -EINVAL;
 989         }
 990 error:
 991         return ret;
 992 }
 993
 994 static int da9121_assign_chip_model(struct i2c_client *i2c,
 995                         struct da9121 *chip)
 996 {
 997         struct regmap_config *regmap;
 998         int ret = 0;
 999
1000         chip->dev = &i2c->dev;
1001
1002         /* Use configured subtype to select the regulator descriptor index and
1003          * register map, common to both consumer and automotive grade variants
1004          */
1005         switch (chip->subvariant_id) {
1006         case DA9121_SUBTYPE_DA9121:
1007         case DA9121_SUBTYPE_DA9130:
1008                 chip->variant_id = DA9121_TYPE_DA9121_DA9130;
1009                 regmap = &da9121_1ch_regmap_config;
1010                 break;
1011         case DA9121_SUBTYPE_DA9217:
1012                 chip->variant_id = DA9121_TYPE_DA9217;
1013                 regmap = &da9121_1ch_regmap_config;
1014                 break;
1015         case DA9121_SUBTYPE_DA9122:
1016         case DA9121_SUBTYPE_DA9131:
1017                 chip->variant_id = DA9121_TYPE_DA9122_DA9131;
1018                 regmap = &da9121_2ch_regmap_config;
1019                 break;
1020         case DA9121_SUBTYPE_DA9220:
1021         case DA9121_SUBTYPE_DA9132:
1022                 chip->variant_id = DA9121_TYPE_DA9220_DA9132;
1023                 regmap = &da9121_2ch_regmap_config;
1024                 break;
1025         case DA9121_SUBTYPE_DA9141:
1026                 chip->variant_id = DA9121_TYPE_DA9141;
1027                 regmap = &da9121_1ch_regmap_config;
1028                 break;
1029         case DA9121_SUBTYPE_DA9142:
1030                 chip->variant_id = DA9121_TYPE_DA9142;
1031                 regmap = &da9121_2ch_regmap_config;
1032                 break;
1033         default:
1034                 return -EINVAL;
1035         }
1036
1037         /* Set these up for of_regulator_match call which may want .of_map_modes */
1038         da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
1039         da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
1040
1041         chip->regmap = devm_regmap_init_i2c(i2c, regmap);
1042         if (IS_ERR(chip->regmap)) {
1043                 ret = PTR_ERR(chip->regmap);
1044                 dev_err(chip->dev, "Failed to configure a register map: %d\n",
1045                         ret);
1046                 return ret;
1047         }
1048
1049         ret = da9121_check_device_type(i2c, chip);
1050
1051         return ret;
1052 }
1053
1054 static int da9121_config_irq(struct i2c_client *i2c,
1055                         struct da9121 *chip)
1056 {
1057         unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1058         const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
1059         int ret = 0;
1060
1061         chip->chip_irq = i2c->irq;
1062
1063         if (chip->chip_irq != 0) {
1064                 if (!of_property_read_u32(chip->dev->of_node,
1065                                           "dlg,irq-polling-delay-passive-ms",
1066                                           &p_delay)) {
1067                         if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
1068                             p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
1069                                 dev_warn(chip->dev,
1070                                          "Out-of-range polling period %d ms\n",
1071                                          p_delay);
1072                                 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1073                         }
1074                 }
1075
1076                 chip->passive_delay = p_delay;
1077
1078                 ret = request_threaded_irq(chip->chip_irq, NULL,
1079                                         da9121_irq_handler,
1080                                         IRQF_TRIGGER_LOW|IRQF_ONESHOT,
1081                                         "da9121", chip);
1082                 if (ret != 0) {
1083                         dev_err(chip->dev, "Failed IRQ request: %d\n",
1084                                 chip->chip_irq);
1085                         goto error;
1086                 }
1087
1088                 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1089                 if (ret != 0) {
1090                         dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
1091                                 ret);
1092                         goto regmap_error;
1093                 }
1094
1095                 INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
1096                 dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
1097                          chip->passive_delay);
1098         }
1099 error:
1100         return ret;
1101 regmap_error:
1102         free_irq(chip->chip_irq, chip);
1103         return ret;
1104 }
1105
1106 static const struct of_device_id da9121_dt_ids[] = {
1107         { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
1108         { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
1109         { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
1110         { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
1111         { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
1112         { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
1113         { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
1114         { .compatible = "dlg,da9141", .data = (void *) DA9121_SUBTYPE_DA9141 },
1115         { .compatible = "dlg,da9142", .data = (void *) DA9121_SUBTYPE_DA9142 },
1116         { }
1117 };
1118 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
1119
1120 static inline int da9121_of_get_id(struct device *dev)
1121 {
1122         const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
1123
1124         if (!id) {
1125                 dev_err(dev, "%s: Failed\n", __func__);
1126                 return -EINVAL;
1127         }
1128         return (uintptr_t)id->data;
1129 }
1130
1131 static int da9121_i2c_probe(struct i2c_client *i2c)
1132 {
1133         struct da9121 *chip;
1134         const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1135         int ret = 0;
1136
1137         chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
1138         if (!chip) {
1139                 ret = -ENOMEM;
1140                 goto error;
1141         }
1142
1143         chip->pdata = i2c->dev.platform_data;
1144         chip->subvariant_id = da9121_of_get_id(&i2c->dev);
1145
1146         ret = da9121_assign_chip_model(i2c, chip);
1147         if (ret < 0)
1148                 goto error;
1149
1150         ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1151         if (ret != 0) {
1152                 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1153                 goto error;
1154         }
1155
1156         ret = da9121_set_regulator_config(chip);
1157         if (ret < 0)
1158                 goto error;
1159
1160         ret = da9121_config_irq(i2c, chip);
1161
1162 error:
1163         return ret;
1164 }
1165
1166 static void da9121_i2c_remove(struct i2c_client *i2c)
1167 {
1168         struct da9121 *chip = i2c_get_clientdata(i2c);
1169         const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1170         int ret;
1171
1172         free_irq(chip->chip_irq, chip);
1173         cancel_delayed_work_sync(&chip->work);
1174
1175         ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1176         if (ret != 0)
1177                 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1178 }
1179
1180 static const struct i2c_device_id da9121_i2c_id[] = {
1181         {"da9121", DA9121_TYPE_DA9121_DA9130},
1182         {"da9130", DA9121_TYPE_DA9121_DA9130},
1183         {"da9217", DA9121_TYPE_DA9217},
1184         {"da9122", DA9121_TYPE_DA9122_DA9131},
1185         {"da9131", DA9121_TYPE_DA9122_DA9131},
1186         {"da9220", DA9121_TYPE_DA9220_DA9132},
1187         {"da9132", DA9121_TYPE_DA9220_DA9132},
1188         {"da9141", DA9121_TYPE_DA9141},
1189         {"da9142", DA9121_TYPE_DA9142},
1190         {},
1191 };
1192 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1193
1194 static struct i2c_driver da9121_regulator_driver = {
1195         .driver = {
1196                 .name = "da9121",
1197                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1198                 .of_match_table = of_match_ptr(da9121_dt_ids),
1199         },
1200         .probe_new = da9121_i2c_probe,
1201         .remove = da9121_i2c_remove,
1202         .id_table = da9121_i2c_id,
1203 };
1204
1205 module_i2c_driver(da9121_regulator_driver);
1206
1207 MODULE_LICENSE("GPL v2");